diff options
Diffstat (limited to 'net-wireless/compat-wireless/files/compat-wireless-3.6.6-grsec.patch')
| -rw-r--r-- | net-wireless/compat-wireless/files/compat-wireless-3.6.6-grsec.patch | 8363 |
1 files changed, 8363 insertions, 0 deletions
diff --git a/net-wireless/compat-wireless/files/compat-wireless-3.6.6-grsec.patch b/net-wireless/compat-wireless/files/compat-wireless-3.6.6-grsec.patch new file mode 100644 index 00000000..bf9e483e --- /dev/null +++ b/net-wireless/compat-wireless/files/compat-wireless-3.6.6-grsec.patch @@ -0,0 +1,8363 @@ +--- drivers/net/ethernet/atheros/alx/alx_sw.h 2012-09-27 23:19:12.000000000 +0000 ++++ drivers/net/ethernet/atheros/alx/alx_sw.h 2012-10-15 17:29:45.216925787 +0000 +@@ -326,7 +326,7 @@ struct alx_hw_callbacks { + + /* Others */ + int (*get_ethtool_regs)(struct alx_hw *, void *); +-}; ++} __no_const; + + struct alx_hw { + struct alx_adapter *adpt; +--- drivers/net/ethernet/atheros/atlx/atl2.c 2012-09-27 23:19:12.000000000 +0000 ++++ drivers/net/ethernet/atheros/atlx/atl2.c 2012-10-15 17:30:59.816924531 +0000 +@@ -2872,7 +2872,7 @@ static void atl2_force_ps(struct atl2_hw + */ + + #define ATL2_PARAM(X, desc) \ +- static const int __devinitdata X[ATL2_MAX_NIC + 1] = ATL2_PARAM_INIT; \ ++ static const int __devinitconst X[ATL2_MAX_NIC + 1] = ATL2_PARAM_INIT; \ + MODULE_PARM(X, "1-" __MODULE_STRING(ATL2_MAX_NIC) "i"); \ + MODULE_PARM_DESC(X, desc); + #else +--- drivers/net/wireless/ath/ath.h 2012-09-27 23:19:12.000000000 +0000 ++++ drivers/net/wireless/ath/ath.h 2012-10-15 17:30:59.818924529 +0000 +@@ -119,6 +119,7 @@ struct ath_ops { + void (*write_flush) (void *); + u32 (*rmw)(void *, u32 reg_offset, u32 set, u32 clr); + }; ++typedef struct ath_ops __no_const ath_ops_no_const; + + struct ath_common; + struct ath_bus_ops; +--- drivers/net/wireless/ath/ath9k/ar9002_mac.c 2012-09-27 23:19:11.000000000 +0000 ++++ drivers/net/wireless/ath/ath9k/ar9002_mac.c 2012-10-15 17:30:59.816924531 +0000 +@@ -184,8 +184,8 @@ ar9002_set_txdesc(struct ath_hw *ah, voi + ads->ds_txstatus6 = ads->ds_txstatus7 = 0; + ads->ds_txstatus8 = ads->ds_txstatus9 = 0; + +- ACCESS_ONCE(ads->ds_link) = i->link; +- ACCESS_ONCE(ads->ds_data) = i->buf_addr[0]; ++ ACCESS_ONCE_RW(ads->ds_link) = i->link; ++ ACCESS_ONCE_RW(ads->ds_data) = i->buf_addr[0]; + + ctl1 = i->buf_len[0] | (i->is_last ? 0 : AR_TxMore); + ctl6 = SM(i->keytype, AR_EncrType); +@@ -199,26 +199,26 @@ ar9002_set_txdesc(struct ath_hw *ah, voi + + if ((i->is_first || i->is_last) && + i->aggr != AGGR_BUF_MIDDLE && i->aggr != AGGR_BUF_LAST) { +- ACCESS_ONCE(ads->ds_ctl2) = set11nTries(i->rates, 0) ++ ACCESS_ONCE_RW(ads->ds_ctl2) = set11nTries(i->rates, 0) + | set11nTries(i->rates, 1) + | set11nTries(i->rates, 2) + | set11nTries(i->rates, 3) + | (i->dur_update ? AR_DurUpdateEna : 0) + | SM(0, AR_BurstDur); + +- ACCESS_ONCE(ads->ds_ctl3) = set11nRate(i->rates, 0) ++ ACCESS_ONCE_RW(ads->ds_ctl3) = set11nRate(i->rates, 0) + | set11nRate(i->rates, 1) + | set11nRate(i->rates, 2) + | set11nRate(i->rates, 3); + } else { +- ACCESS_ONCE(ads->ds_ctl2) = 0; +- ACCESS_ONCE(ads->ds_ctl3) = 0; ++ ACCESS_ONCE_RW(ads->ds_ctl2) = 0; ++ ACCESS_ONCE_RW(ads->ds_ctl3) = 0; + } + + if (!i->is_first) { +- ACCESS_ONCE(ads->ds_ctl0) = 0; +- ACCESS_ONCE(ads->ds_ctl1) = ctl1; +- ACCESS_ONCE(ads->ds_ctl6) = ctl6; ++ ACCESS_ONCE_RW(ads->ds_ctl0) = 0; ++ ACCESS_ONCE_RW(ads->ds_ctl1) = ctl1; ++ ACCESS_ONCE_RW(ads->ds_ctl6) = ctl6; + return; + } + +@@ -243,7 +243,7 @@ ar9002_set_txdesc(struct ath_hw *ah, voi + break; + } + +- ACCESS_ONCE(ads->ds_ctl0) = (i->pkt_len & AR_FrameLen) ++ ACCESS_ONCE_RW(ads->ds_ctl0) = (i->pkt_len & AR_FrameLen) + | (i->flags & ATH9K_TXDESC_VMF ? AR_VirtMoreFrag : 0) + | SM(i->txpower, AR_XmitPower) + | (i->flags & ATH9K_TXDESC_VEOL ? AR_VEOL : 0) +@@ -253,19 +253,19 @@ ar9002_set_txdesc(struct ath_hw *ah, voi + | (i->flags & ATH9K_TXDESC_RTSENA ? AR_RTSEnable : + (i->flags & ATH9K_TXDESC_CTSENA ? AR_CTSEnable : 0)); + +- ACCESS_ONCE(ads->ds_ctl1) = ctl1; +- ACCESS_ONCE(ads->ds_ctl6) = ctl6; ++ ACCESS_ONCE_RW(ads->ds_ctl1) = ctl1; ++ ACCESS_ONCE_RW(ads->ds_ctl6) = ctl6; + + if (i->aggr == AGGR_BUF_MIDDLE || i->aggr == AGGR_BUF_LAST) + return; + +- ACCESS_ONCE(ads->ds_ctl4) = set11nPktDurRTSCTS(i->rates, 0) ++ ACCESS_ONCE_RW(ads->ds_ctl4) = set11nPktDurRTSCTS(i->rates, 0) + | set11nPktDurRTSCTS(i->rates, 1); + +- ACCESS_ONCE(ads->ds_ctl5) = set11nPktDurRTSCTS(i->rates, 2) ++ ACCESS_ONCE_RW(ads->ds_ctl5) = set11nPktDurRTSCTS(i->rates, 2) + | set11nPktDurRTSCTS(i->rates, 3); + +- ACCESS_ONCE(ads->ds_ctl7) = set11nRateFlags(i->rates, 0) ++ ACCESS_ONCE_RW(ads->ds_ctl7) = set11nRateFlags(i->rates, 0) + | set11nRateFlags(i->rates, 1) + | set11nRateFlags(i->rates, 2) + | set11nRateFlags(i->rates, 3) +--- drivers/net/wireless/ath/ath9k/ar9003_mac.c 2012-09-27 23:19:12.000000000 +0000 ++++ drivers/net/wireless/ath/ath9k/ar9003_mac.c 2012-10-15 17:30:59.817924530 +0000 +@@ -39,47 +39,47 @@ ar9003_set_txdesc(struct ath_hw *ah, voi + (i->qcu << AR_TxQcuNum_S) | desc_len; + + checksum += val; +- ACCESS_ONCE(ads->info) = val; ++ ACCESS_ONCE_RW(ads->info) = val; + + checksum += i->link; +- ACCESS_ONCE(ads->link) = i->link; ++ ACCESS_ONCE_RW(ads->link) = i->link; + + checksum += i->buf_addr[0]; +- ACCESS_ONCE(ads->data0) = i->buf_addr[0]; ++ ACCESS_ONCE_RW(ads->data0) = i->buf_addr[0]; + checksum += i->buf_addr[1]; +- ACCESS_ONCE(ads->data1) = i->buf_addr[1]; ++ ACCESS_ONCE_RW(ads->data1) = i->buf_addr[1]; + checksum += i->buf_addr[2]; +- ACCESS_ONCE(ads->data2) = i->buf_addr[2]; ++ ACCESS_ONCE_RW(ads->data2) = i->buf_addr[2]; + checksum += i->buf_addr[3]; +- ACCESS_ONCE(ads->data3) = i->buf_addr[3]; ++ ACCESS_ONCE_RW(ads->data3) = i->buf_addr[3]; + + checksum += (val = (i->buf_len[0] << AR_BufLen_S) & AR_BufLen); +- ACCESS_ONCE(ads->ctl3) = val; ++ ACCESS_ONCE_RW(ads->ctl3) = val; + checksum += (val = (i->buf_len[1] << AR_BufLen_S) & AR_BufLen); +- ACCESS_ONCE(ads->ctl5) = val; ++ ACCESS_ONCE_RW(ads->ctl5) = val; + checksum += (val = (i->buf_len[2] << AR_BufLen_S) & AR_BufLen); +- ACCESS_ONCE(ads->ctl7) = val; ++ ACCESS_ONCE_RW(ads->ctl7) = val; + checksum += (val = (i->buf_len[3] << AR_BufLen_S) & AR_BufLen); +- ACCESS_ONCE(ads->ctl9) = val; ++ ACCESS_ONCE_RW(ads->ctl9) = val; + + checksum = (u16) (((checksum & 0xffff) + (checksum >> 16)) & 0xffff); +- ACCESS_ONCE(ads->ctl10) = checksum; ++ ACCESS_ONCE_RW(ads->ctl10) = checksum; + + if (i->is_first || i->is_last) { +- ACCESS_ONCE(ads->ctl13) = set11nTries(i->rates, 0) ++ ACCESS_ONCE_RW(ads->ctl13) = set11nTries(i->rates, 0) + | set11nTries(i->rates, 1) + | set11nTries(i->rates, 2) + | set11nTries(i->rates, 3) + | (i->dur_update ? AR_DurUpdateEna : 0) + | SM(0, AR_BurstDur); + +- ACCESS_ONCE(ads->ctl14) = set11nRate(i->rates, 0) ++ ACCESS_ONCE_RW(ads->ctl14) = set11nRate(i->rates, 0) + | set11nRate(i->rates, 1) + | set11nRate(i->rates, 2) + | set11nRate(i->rates, 3); + } else { +- ACCESS_ONCE(ads->ctl13) = 0; +- ACCESS_ONCE(ads->ctl14) = 0; ++ ACCESS_ONCE_RW(ads->ctl13) = 0; ++ ACCESS_ONCE_RW(ads->ctl14) = 0; + } + + ads->ctl20 = 0; +@@ -89,17 +89,17 @@ ar9003_set_txdesc(struct ath_hw *ah, voi + + ctl17 = SM(i->keytype, AR_EncrType); + if (!i->is_first) { +- ACCESS_ONCE(ads->ctl11) = 0; +- ACCESS_ONCE(ads->ctl12) = i->is_last ? 0 : AR_TxMore; +- ACCESS_ONCE(ads->ctl15) = 0; +- ACCESS_ONCE(ads->ctl16) = 0; +- ACCESS_ONCE(ads->ctl17) = ctl17; +- ACCESS_ONCE(ads->ctl18) = 0; +- ACCESS_ONCE(ads->ctl19) = 0; ++ ACCESS_ONCE_RW(ads->ctl11) = 0; ++ ACCESS_ONCE_RW(ads->ctl12) = i->is_last ? 0 : AR_TxMore; ++ ACCESS_ONCE_RW(ads->ctl15) = 0; ++ ACCESS_ONCE_RW(ads->ctl16) = 0; ++ ACCESS_ONCE_RW(ads->ctl17) = ctl17; ++ ACCESS_ONCE_RW(ads->ctl18) = 0; ++ ACCESS_ONCE_RW(ads->ctl19) = 0; + return; + } + +- ACCESS_ONCE(ads->ctl11) = (i->pkt_len & AR_FrameLen) ++ ACCESS_ONCE_RW(ads->ctl11) = (i->pkt_len & AR_FrameLen) + | (i->flags & ATH9K_TXDESC_VMF ? AR_VirtMoreFrag : 0) + | SM(i->txpower, AR_XmitPower) + | (i->flags & ATH9K_TXDESC_VEOL ? AR_VEOL : 0) +@@ -135,22 +135,22 @@ ar9003_set_txdesc(struct ath_hw *ah, voi + val = (i->flags & ATH9K_TXDESC_PAPRD) >> ATH9K_TXDESC_PAPRD_S; + ctl12 |= SM(val, AR_PAPRDChainMask); + +- ACCESS_ONCE(ads->ctl12) = ctl12; +- ACCESS_ONCE(ads->ctl17) = ctl17; ++ ACCESS_ONCE_RW(ads->ctl12) = ctl12; ++ ACCESS_ONCE_RW(ads->ctl17) = ctl17; + +- ACCESS_ONCE(ads->ctl15) = set11nPktDurRTSCTS(i->rates, 0) ++ ACCESS_ONCE_RW(ads->ctl15) = set11nPktDurRTSCTS(i->rates, 0) + | set11nPktDurRTSCTS(i->rates, 1); + +- ACCESS_ONCE(ads->ctl16) = set11nPktDurRTSCTS(i->rates, 2) ++ ACCESS_ONCE_RW(ads->ctl16) = set11nPktDurRTSCTS(i->rates, 2) + | set11nPktDurRTSCTS(i->rates, 3); + +- ACCESS_ONCE(ads->ctl18) = set11nRateFlags(i->rates, 0) ++ ACCESS_ONCE_RW(ads->ctl18) = set11nRateFlags(i->rates, 0) + | set11nRateFlags(i->rates, 1) + | set11nRateFlags(i->rates, 2) + | set11nRateFlags(i->rates, 3) + | SM(i->rtscts_rate, AR_RTSCTSRate); + +- ACCESS_ONCE(ads->ctl19) = AR_Not_Sounding; ++ ACCESS_ONCE_RW(ads->ctl19) = AR_Not_Sounding; + } + + static u16 ar9003_calc_ptr_chksum(struct ar9003_txc *ads) +--- drivers/net/wireless/ath/ath9k/hw.h 2012-09-27 23:19:12.000000000 +0000 ++++ drivers/net/wireless/ath/ath9k/hw.h 2012-10-15 17:30:59.817924530 +0000 +@@ -657,7 +657,7 @@ struct ath_hw_private_ops { + + /* ANI */ + void (*ani_cache_ini_regs)(struct ath_hw *ah); +-}; ++} __no_const; + + /** + * struct ath_hw_ops - callbacks used by hardware code and driver code +@@ -687,7 +687,7 @@ struct ath_hw_ops { + void (*antdiv_comb_conf_set)(struct ath_hw *ah, + struct ath_hw_antcomb_conf *antconf); + void (*antctrl_shared_chain_lnadiv)(struct ath_hw *hw, bool enable); +-}; ++} __no_const; + + struct ath_nf_limits { + s16 max; +@@ -707,7 +707,7 @@ enum ath_cal_list { + #define AH_FASTCC 0x4 + + struct ath_hw { +- struct ath_ops reg_ops; ++ ath_ops_no_const reg_ops; + + struct ieee80211_hw *hw; + struct ath_common common; +--- drivers/net/wireless/brcm80211/brcmsmac/phy/phy_int.h 2012-09-27 23:19:11.000000000 +0000 ++++ drivers/net/wireless/brcm80211/brcmsmac/phy/phy_int.h 2012-10-15 17:30:59.818924529 +0000 +@@ -545,7 +545,7 @@ struct phy_func_ptr { + void (*carrsuppr)(struct brcms_phy *); + s32 (*rxsigpwr)(struct brcms_phy *, s32); + void (*detach)(struct brcms_phy *); +-}; ++} __no_const; + + struct brcms_phy { + struct brcms_phy_pub pubpi_ro; +--- drivers/net/wireless/iwlegacy/3945-mac.c 2012-09-27 23:19:12.000000000 +0000 ++++ drivers/net/wireless/iwlegacy/3945-mac.c 2012-10-15 17:30:59.819924529 +0000 +@@ -3613,7 +3613,9 @@ il3945_pci_probe(struct pci_dev *pdev, c + */ + if (il3945_mod_params.disable_hw_scan) { + D_INFO("Disabling hw_scan\n"); +- il3945_mac_ops.hw_scan = NULL; ++ pax_open_kernel(); ++ *(void **)&il3945_mac_ops.hw_scan = NULL; ++ pax_close_kernel(); + } + + D_INFO("*** LOAD DRIVER ***\n"); +--- drivers/net/wireless/iwlwifi/dvm/debugfs.c 2012-09-27 23:19:11.000000000 +0000 ++++ drivers/net/wireless/iwlwifi/dvm/debugfs.c 2012-10-15 17:30:59.819924529 +0000 +@@ -203,7 +203,7 @@ static ssize_t iwl_dbgfs_sram_write(stru + { + struct iwl_priv *priv = file->private_data; + char buf[64]; +- int buf_size; ++ size_t buf_size; + u32 offset, len; + + memset(buf, 0, sizeof(buf)); +@@ -473,7 +473,7 @@ static ssize_t iwl_dbgfs_rx_handlers_wri + struct iwl_priv *priv = file->private_data; + + char buf[8]; +- int buf_size; ++ size_t buf_size; + u32 reset_flag; + + memset(buf, 0, sizeof(buf)); +@@ -554,7 +554,7 @@ static ssize_t iwl_dbgfs_disable_ht40_wr + { + struct iwl_priv *priv = file->private_data; + char buf[8]; +- int buf_size; ++ size_t buf_size; + int ht40; + + memset(buf, 0, sizeof(buf)); +@@ -606,7 +606,7 @@ static ssize_t iwl_dbgfs_sleep_level_ove + { + struct iwl_priv *priv = file->private_data; + char buf[8]; +- int buf_size; ++ size_t buf_size; + int value; + + memset(buf, 0, sizeof(buf)); +@@ -1871,7 +1871,7 @@ static ssize_t iwl_dbgfs_clear_ucode_sta + { + struct iwl_priv *priv = file->private_data; + char buf[8]; +- int buf_size; ++ size_t buf_size; + int clear; + + memset(buf, 0, sizeof(buf)); +@@ -1916,7 +1916,7 @@ static ssize_t iwl_dbgfs_ucode_tracing_w + { + struct iwl_priv *priv = file->private_data; + char buf[8]; +- int buf_size; ++ size_t buf_size; + int trace; + + memset(buf, 0, sizeof(buf)); +@@ -1987,7 +1987,7 @@ static ssize_t iwl_dbgfs_missed_beacon_w + { + struct iwl_priv *priv = file->private_data; + char buf[8]; +- int buf_size; ++ size_t buf_size; + int missed; + + memset(buf, 0, sizeof(buf)); +@@ -2028,7 +2028,7 @@ static ssize_t iwl_dbgfs_plcp_delta_writ + + struct iwl_priv *priv = file->private_data; + char buf[8]; +- int buf_size; ++ size_t buf_size; + int plcp; + + memset(buf, 0, sizeof(buf)); +@@ -2088,7 +2088,7 @@ static ssize_t iwl_dbgfs_txfifo_flush_wr + + struct iwl_priv *priv = file->private_data; + char buf[8]; +- int buf_size; ++ size_t buf_size; + int flush; + + memset(buf, 0, sizeof(buf)); +@@ -2178,7 +2178,7 @@ static ssize_t iwl_dbgfs_protection_mode + + struct iwl_priv *priv = file->private_data; + char buf[8]; +- int buf_size; ++ size_t buf_size; + int rts; + + if (!priv->cfg->ht_params) +@@ -2220,7 +2220,7 @@ static ssize_t iwl_dbgfs_echo_test_write + { + struct iwl_priv *priv = file->private_data; + char buf[8]; +- int buf_size; ++ size_t buf_size; + + memset(buf, 0, sizeof(buf)); + buf_size = min(count, sizeof(buf) - 1); +@@ -2256,7 +2256,7 @@ static ssize_t iwl_dbgfs_log_event_write + struct iwl_priv *priv = file->private_data; + u32 event_log_flag; + char buf[8]; +- int buf_size; ++ size_t buf_size; + + /* check that the interface is up */ + if (!iwl_is_ready(priv)) +@@ -2310,7 +2310,7 @@ static ssize_t iwl_dbgfs_calib_disabled_ + struct iwl_priv *priv = file->private_data; + char buf[8]; + u32 calib_disabled; +- int buf_size; ++ size_t buf_size; + + memset(buf, 0, sizeof(buf)); + buf_size = min(count, sizeof(buf) - 1); +--- drivers/net/wireless/iwlwifi/pcie/trans.c 2012-09-27 23:19:12.000000000 +0000 ++++ drivers/net/wireless/iwlwifi/pcie/trans.c 2012-10-15 17:30:59.820924530 +0000 +@@ -1944,7 +1944,7 @@ static ssize_t iwl_dbgfs_interrupt_write + struct isr_statistics *isr_stats = &trans_pcie->isr_stats; + + char buf[8]; +- int buf_size; ++ size_t buf_size; + u32 reset_flag; + + memset(buf, 0, sizeof(buf)); +@@ -1965,7 +1965,7 @@ static ssize_t iwl_dbgfs_csr_write(struc + { + struct iwl_trans *trans = file->private_data; + char buf[8]; +- int buf_size; ++ size_t buf_size; + int csr; + + memset(buf, 0, sizeof(buf)); +--- drivers/net/wireless/mac80211_hwsim.c 2012-09-27 23:19:12.000000000 +0000 ++++ drivers/net/wireless/mac80211_hwsim.c 2012-10-15 17:30:59.820924530 +0000 +@@ -1748,9 +1748,11 @@ static int __init init_mac80211_hwsim(vo + return -EINVAL; + + if (fake_hw_scan) { +- mac80211_hwsim_ops.hw_scan = mac80211_hwsim_hw_scan; +- mac80211_hwsim_ops.sw_scan_start = NULL; +- mac80211_hwsim_ops.sw_scan_complete = NULL; ++ pax_open_kernel(); ++ *(void **)&mac80211_hwsim_ops.hw_scan = mac80211_hwsim_hw_scan; ++ *(void **)&mac80211_hwsim_ops.sw_scan_start = NULL; ++ *(void **)&mac80211_hwsim_ops.sw_scan_complete = NULL; ++ pax_close_kernel(); + } + + spin_lock_init(&hwsim_radio_lock); +--- drivers/net/wireless/mwifiex/main.h 2012-09-27 23:19:11.000000000 +0000 ++++ drivers/net/wireless/mwifiex/main.h 2012-10-15 17:30:59.820924530 +0000 +@@ -571,7 +571,7 @@ struct mwifiex_if_ops { + int (*event_complete) (struct mwifiex_adapter *, struct sk_buff *); + int (*data_complete) (struct mwifiex_adapter *, struct sk_buff *); + int (*dnld_fw) (struct mwifiex_adapter *, struct mwifiex_fw_image *); +-}; ++} __no_const; + + struct mwifiex_adapter { + u8 iface_type; +--- drivers/net/wireless/rndis_wlan.c 2012-09-27 23:19:12.000000000 +0000 ++++ drivers/net/wireless/rndis_wlan.c 2012-10-15 17:30:59.821924531 +0000 +@@ -1235,7 +1235,7 @@ static int set_rts_threshold(struct usbn + + netdev_dbg(usbdev->net, "%s(): %i\n", __func__, rts_threshold); + +- if (rts_threshold < 0 || rts_threshold > 2347) ++ if (rts_threshold > 2347) + rts_threshold = 2347; + + tmp = cpu_to_le32(rts_threshold); +--- drivers/net/wireless/rt2x00/rt2x00.h 2012-09-27 23:19:11.000000000 +0000 ++++ drivers/net/wireless/rt2x00/rt2x00.h 2012-10-15 17:30:59.821924531 +0000 +@@ -397,7 +397,7 @@ struct rt2x00_intf { + * for hardware which doesn't support hardware + * sequence counting. + */ +- atomic_t seqno; ++ atomic_unchecked_t seqno; + }; + + static inline struct rt2x00_intf* vif_to_intf(struct ieee80211_vif *vif) +--- drivers/net/wireless/rt2x00/rt2x00queue.c 2012-09-27 23:19:11.000000000 +0000 ++++ drivers/net/wireless/rt2x00/rt2x00queue.c 2012-10-15 17:30:59.822924531 +0000 +@@ -240,9 +240,9 @@ static void rt2x00queue_create_tx_descri + * sequence counter given by mac80211. + */ + if (test_bit(ENTRY_TXD_FIRST_FRAGMENT, &txdesc->flags)) +- seqno = atomic_add_return(0x10, &intf->seqno); ++ seqno = atomic_add_return_unchecked(0x10, &intf->seqno); + else +- seqno = atomic_read(&intf->seqno); ++ seqno = atomic_read_unchecked(&intf->seqno); + + hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); + hdr->seq_ctrl |= cpu_to_le16(seqno); +--- drivers/net/wireless/ti/wl1251/wl1251.h 2012-09-27 23:19:11.000000000 +0000 ++++ drivers/net/wireless/ti/wl1251/wl1251.h 2012-10-15 17:30:59.822924531 +0000 +@@ -266,7 +266,7 @@ struct wl1251_if_operations { + void (*reset)(struct wl1251 *wl); + void (*enable_irq)(struct wl1251 *wl); + void (*disable_irq)(struct wl1251 *wl); +-}; ++} __no_const; + + struct wl1251 { + struct ieee80211_hw *hw; +--- drivers/net/wireless/ti/wlcore/wlcore.h 2012-09-27 23:19:12.000000000 +0000 ++++ drivers/net/wireless/ti/wlcore/wlcore.h 2012-10-15 17:30:59.822924531 +0000 +@@ -81,7 +81,7 @@ struct wlcore_ops { + struct ieee80211_sta *sta, + struct ieee80211_key_conf *key_conf); + u32 (*pre_pkt_send)(struct wl1271 *wl, u32 buf_offset, u32 last_len); +-}; ++} __no_const; + + enum wlcore_partitions { + PART_DOWN, +--- include/linux/unaligned/access_ok.h 2012-09-17 19:15:56.000000000 +0000 ++++ include/linux/unaligned/access_ok.h 2012-10-15 17:30:59.823924531 +0000 +@@ -6,32 +6,32 @@ + + static inline u16 get_unaligned_le16(const void *p) + { +- return le16_to_cpup((__le16 *)p); ++ return le16_to_cpup((const __le16 *)p); + } + + static inline u32 get_unaligned_le32(const void *p) + { +- return le32_to_cpup((__le32 *)p); ++ return le32_to_cpup((const __le32 *)p); + } + + static inline u64 get_unaligned_le64(const void *p) + { +- return le64_to_cpup((__le64 *)p); ++ return le64_to_cpup((const __le64 *)p); + } + + static inline u16 get_unaligned_be16(const void *p) + { +- return be16_to_cpup((__be16 *)p); ++ return be16_to_cpup((const __be16 *)p); + } + + static inline u32 get_unaligned_be32(const void *p) + { +- return be32_to_cpup((__be32 *)p); ++ return be32_to_cpup((const __be32 *)p); + } + + static inline u64 get_unaligned_be64(const void *p) + { +- return be64_to_cpup((__be64 *)p); ++ return be64_to_cpup((const __be64 *)p); + } + + static inline void put_unaligned_le16(u16 val, void *p) +--- net/bluetooth/hci_sock.c 2012-09-27 23:19:12.000000000 +0000 ++++ net/bluetooth/hci_sock.c 2012-10-15 17:30:59.825924531 +0000 +@@ -940,7 +940,7 @@ static int hci_sock_setsockopt(struct so + uf.event_mask[1] = *((u32 *) f->event_mask + 1); + } + +- len = min_t(unsigned int, len, sizeof(uf)); ++ len = min((size_t)len, sizeof(uf)); + if (copy_from_user(&uf, optval, len)) { + err = -EFAULT; + break; +--- net/bluetooth/l2cap_core.c 2012-09-27 23:19:11.000000000 +0000 ++++ net/bluetooth/l2cap_core.c 2012-10-15 17:30:59.825924531 +0000 +@@ -3165,8 +3165,10 @@ static int l2cap_parse_conf_rsp(struct l + break; + + case L2CAP_CONF_RFC: +- if (olen == sizeof(rfc)) +- memcpy(&rfc, (void *)val, olen); ++ if (olen != sizeof(rfc)) ++ break; ++ ++ memcpy(&rfc, (void *)val, olen); + + if (test_bit(CONF_STATE2_DEVICE, &chan->conf_state) && + rfc.mode != chan->mode) +--- net/bluetooth/l2cap_sock.c 2012-09-27 23:19:12.000000000 +0000 ++++ net/bluetooth/l2cap_sock.c 2012-10-15 17:30:59.826924531 +0000 +@@ -467,7 +467,8 @@ static int l2cap_sock_setsockopt_old(str + struct sock *sk = sock->sk; + struct l2cap_chan *chan = l2cap_pi(sk)->chan; + struct l2cap_options opts; +- int len, err = 0; ++ int err = 0; ++ size_t len = optlen; + u32 opt; + + BT_DBG("sk %p", sk); +@@ -489,7 +490,7 @@ static int l2cap_sock_setsockopt_old(str + opts.max_tx = chan->max_tx; + opts.txwin_size = chan->tx_win; + +- len = min_t(unsigned int, sizeof(opts), optlen); ++ len = min(sizeof(opts), len); + if (copy_from_user((char *) &opts, optval, len)) { + err = -EFAULT; + break; +@@ -574,7 +575,8 @@ static int l2cap_sock_setsockopt(struct + struct bt_security sec; + struct bt_power pwr; + struct l2cap_conn *conn; +- int len, err = 0; ++ int err = 0; ++ size_t len = optlen; + u32 opt; + + BT_DBG("sk %p", sk); +@@ -597,7 +599,7 @@ static int l2cap_sock_setsockopt(struct + + sec.level = BT_SECURITY_LOW; + +- len = min_t(unsigned int, sizeof(sec), optlen); ++ len = min(sizeof(sec), len); + if (copy_from_user((char *) &sec, optval, len)) { + err = -EFAULT; + break; +@@ -694,7 +696,7 @@ static int l2cap_sock_setsockopt(struct + + pwr.force_active = BT_POWER_FORCE_ACTIVE_ON; + +- len = min_t(unsigned int, sizeof(pwr), optlen); ++ len = min(sizeof(pwr), len); + if (copy_from_user((char *) &pwr, optval, len)) { + err = -EFAULT; + break; +--- net/bluetooth/rfcomm/sock.c 2012-09-27 23:19:12.000000000 +0000 ++++ net/bluetooth/rfcomm/sock.c 2012-10-15 17:30:59.826924531 +0000 +@@ -676,7 +676,7 @@ static int rfcomm_sock_setsockopt(struct + struct sock *sk = sock->sk; + struct bt_security sec; + int err = 0; +- size_t len; ++ size_t len = optlen; + u32 opt; + + BT_DBG("sk %p", sk); +@@ -698,7 +698,7 @@ static int rfcomm_sock_setsockopt(struct + + sec.level = BT_SECURITY_LOW; + +- len = min_t(unsigned int, sizeof(sec), optlen); ++ len = min(sizeof(sec), len); + if (copy_from_user((char *) &sec, optval, len)) { + err = -EFAULT; + break; +--- net/bluetooth/rfcomm/tty.c 2012-09-27 23:19:12.000000000 +0000 ++++ net/bluetooth/rfcomm/tty.c 2012-10-15 17:30:59.826924531 +0000 +@@ -309,7 +309,7 @@ static void rfcomm_dev_del(struct rfcomm + BUG_ON(test_and_set_bit(RFCOMM_TTY_RELEASED, &dev->flags)); + + spin_lock_irqsave(&dev->port.lock, flags); +- if (dev->port.count > 0) { ++ if (atomic_read(&dev->port.count) > 0) { + spin_unlock_irqrestore(&dev->port.lock, flags); + return; + } +@@ -664,10 +664,10 @@ static int rfcomm_tty_open(struct tty_st + return -ENODEV; + + BT_DBG("dev %p dst %s channel %d opened %d", dev, batostr(&dev->dst), +- dev->channel, dev->port.count); ++ dev->channel, atomic_read(&dev->port.count)); + + spin_lock_irqsave(&dev->port.lock, flags); +- if (++dev->port.count > 1) { ++ if (atomic_inc_return(&dev->port.count) > 1) { + spin_unlock_irqrestore(&dev->port.lock, flags); + return 0; + } +@@ -736,10 +736,10 @@ static void rfcomm_tty_close(struct tty_ + return; + + BT_DBG("tty %p dev %p dlc %p opened %d", tty, dev, dev->dlc, +- dev->port.count); ++ atomic_read(&dev->port.count)); + + spin_lock_irqsave(&dev->port.lock, flags); +- if (!--dev->port.count) { ++ if (!atomic_dec_return(&dev->port.count)) { + spin_unlock_irqrestore(&dev->port.lock, flags); + if (dev->tty_dev->parent) + #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,29)) +--- net/mac80211/ieee80211_i.h 2012-09-27 23:19:12.000000000 +0000 ++++ net/mac80211/ieee80211_i.h 2012-10-15 17:30:59.827924531 +0000 +@@ -28,6 +28,7 @@ + #include <net/ieee80211_radiotap.h> + #include <net/cfg80211.h> + #include <net/mac80211.h> ++#include <asm/local.h> + #include "key.h" + #include "sta_info.h" + #include "debug.h" +@@ -840,7 +841,7 @@ struct ieee80211_local { + /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */ + spinlock_t queue_stop_reason_lock; + +- int open_count; ++ local_t open_count; + int monitors, cooked_mntrs; + /* number of interfaces with corresponding FIF_ flags */ + int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll, +--- net/mac80211/iface.c 2012-09-27 23:19:12.000000000 +0000 ++++ net/mac80211/iface.c 2012-10-15 17:30:59.827924531 +0000 +@@ -454,7 +454,7 @@ static int ieee80211_do_open(struct net_ + break; + } + +- if (local->open_count == 0) { ++ if (local_read(&local->open_count) == 0) { + res = drv_start(local); + if (res) + goto err_del_bss; +@@ -497,7 +497,7 @@ static int ieee80211_do_open(struct net_ + break; + } + +- if (local->monitors == 0 && local->open_count == 0) { ++ if (local->monitors == 0 && local_read(&local->open_count) == 0) { + res = ieee80211_add_virtual_monitor(local); + if (res) + goto err_stop; +@@ -594,7 +594,7 @@ static int ieee80211_do_open(struct net_ + mutex_unlock(&local->mtx); + + if (coming_up) +- local->open_count++; ++ local_inc(&local->open_count); + + if (hw_reconf_flags) + ieee80211_hw_config(local, hw_reconf_flags); +@@ -607,7 +607,7 @@ static int ieee80211_do_open(struct net_ + err_del_interface: + drv_remove_interface(local, sdata); + err_stop: +- if (!local->open_count) ++ if (!local_read(&local->open_count)) + drv_stop(local); + err_del_bss: + sdata->bss = NULL; +@@ -741,7 +741,7 @@ static void ieee80211_do_stop(struct iee + } + + if (going_down) +- local->open_count--; ++ local_dec(&local->open_count); + + switch (sdata->vif.type) { + case NL80211_IFTYPE_AP_VLAN: +@@ -801,7 +801,7 @@ static void ieee80211_do_stop(struct iee + + ieee80211_recalc_ps(local, -1); + +- if (local->open_count == 0) { ++ if (local_read(&local->open_count) == 0) { + if (local->ops->napi_poll) + napi_disable(&local->napi); + ieee80211_clear_tx_pending(local); +@@ -833,7 +833,7 @@ static void ieee80211_do_stop(struct iee + } + spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); + +- if (local->monitors == local->open_count && local->monitors > 0) ++ if (local->monitors == local_read(&local->open_count) && local->monitors > 0) + ieee80211_add_virtual_monitor(local); + } + +--- net/mac80211/main.c 2012-09-27 23:19:12.000000000 +0000 ++++ net/mac80211/main.c 2012-10-15 17:30:59.827924531 +0000 +@@ -170,7 +170,7 @@ int ieee80211_hw_config(struct ieee80211 + local->hw.conf.power_level = power; + } + +- if (changed && local->open_count) { ++ if (changed && local_read(&local->open_count)) { + ret = drv_config(local, changed); + /* + * Goal: +--- net/mac80211/pm.c 2012-09-27 23:19:11.000000000 +0000 ++++ net/mac80211/pm.c 2012-10-15 17:30:59.828924531 +0000 +@@ -34,7 +34,7 @@ int __ieee80211_suspend(struct ieee80211 + struct ieee80211_sub_if_data *sdata; + struct sta_info *sta; + +- if (!local->open_count) ++ if (!local_read(&local->open_count)) + goto suspend; + + ieee80211_scan_cancel(local); +@@ -72,7 +72,7 @@ int __ieee80211_suspend(struct ieee80211 + cancel_work_sync(&local->dynamic_ps_enable_work); + del_timer_sync(&local->dynamic_ps_timer); + +- local->wowlan = wowlan && local->open_count; ++ local->wowlan = wowlan && local_read(&local->open_count); + if (local->wowlan) { + int err = drv_suspend(local, wowlan); + if (err < 0) { +@@ -143,7 +143,7 @@ int __ieee80211_suspend(struct ieee80211 + drv_remove_interface(local, sdata); + + /* stop hardware - this must stop RX */ +- if (local->open_count) ++ if (local_read(&local->open_count)) + ieee80211_stop_device(local); + + suspend: +--- net/mac80211/rate.c 2012-09-27 23:19:12.000000000 +0000 ++++ net/mac80211/rate.c 2012-10-15 17:30:59.828924531 +0000 +@@ -494,7 +494,7 @@ int ieee80211_init_rate_ctrl_alg(struct + + ASSERT_RTNL(); + +- if (local->open_count) ++ if (local_read(&local->open_count)) + return -EBUSY; + + if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) { +--- net/mac80211/rc80211_pid_debugfs.c 2012-09-27 23:19:11.000000000 +0000 ++++ net/mac80211/rc80211_pid_debugfs.c 2012-10-15 17:30:59.828924531 +0000 +@@ -193,7 +193,7 @@ static ssize_t rate_control_pid_events_r + + spin_unlock_irqrestore(&events->lock, status); + +- if (copy_to_user(buf, pb, p)) ++ if (p > sizeof(pb) || copy_to_user(buf, pb, p)) + return -EFAULT; + + return p; +--- net/mac80211/util.c 2012-09-27 23:19:11.000000000 +0000 ++++ net/mac80211/util.c 2012-10-15 17:30:59.828924531 +0000 +@@ -1251,7 +1251,7 @@ int ieee80211_reconfig(struct ieee80211_ + } + #endif + /* everything else happens only if HW was up & running */ +- if (!local->open_count) ++ if (!local_read(&local->open_count)) + goto wake_up; + + /* +--- net/wireless/core.h 2012-09-27 23:19:11.000000000 +0000 ++++ net/wireless/core.h 2012-10-15 17:30:59.829924531 +0000 +@@ -28,7 +28,7 @@ struct cfg80211_registered_device { + struct mutex mtx; + + /* rfkill support */ +- struct rfkill_ops rfkill_ops; ++ rfkill_ops_no_const rfkill_ops; + struct rfkill *rfkill; + struct work_struct rfkill_sync; + +--- net/wireless/wext-core.c 2012-09-27 23:19:12.000000000 +0000 ++++ net/wireless/wext-core.c 2012-10-15 17:30:59.829924531 +0000 +@@ -792,8 +792,7 @@ static int ioctl_standard_iw_point(struc + */ + + /* Support for very large requests */ +- if ((descr->flags & IW_DESCR_FLAG_NOMAX) && +- (user_length > descr->max_tokens)) { ++ if (user_length > descr->max_tokens) { + /* Allow userspace to GET more than max so + * we can support any size GET requests. + * There is still a limit : -ENOMEM. +@@ -832,22 +831,6 @@ static int ioctl_standard_iw_point(struc + } + } + +- if (IW_IS_GET(cmd) && !(descr->flags & IW_DESCR_FLAG_NOMAX)) { +- /* +- * If this is a GET, but not NOMAX, it means that the extra +- * data is not bounded by userspace, but by max_tokens. Thus +- * set the length to max_tokens. This matches the extra data +- * allocation. +- * The driver should fill it with the number of tokens it +- * provided, and it may check iwp->length rather than having +- * knowledge of max_tokens. If the driver doesn't change the +- * iwp->length, this ioctl just copies back max_token tokens +- * filled with zeroes. Hopefully the driver isn't claiming +- * them to be valid data. +- */ +- iwp->length = descr->max_tokens; +- } +- + err = handler(dev, info, (union iwreq_data *) iwp, extra); + + iwp->length += essid_compat; +--- scripts/gcc-plugin.sh 1970-01-01 00:00:00.000000000 +0000 ++++ scripts/gcc-plugin.sh 2012-10-15 17:30:59.829924531 +0000 +@@ -0,0 +1,17 @@ ++#!/bin/bash ++plugincc=`$1 -x c -shared - -o /dev/null -I\`$3 -print-file-name=plugin\`/include 2>&1 <<EOF ++#include "gcc-plugin.h" ++#include "tree.h" ++#include "tm.h" ++#include "rtl.h" ++#ifdef ENABLE_BUILD_WITH_CXX ++#warning $2 ++#else ++#warning $1 ++#endif ++EOF` ++if [ $? -eq 0 ] ++then ++ [[ "$plugincc" =~ "$1" ]] && echo "$1" ++ [[ "$plugincc" =~ "$2" ]] && echo "$2" ++fi +--- tools/gcc/.gitignore 1970-01-01 00:00:00.000000000 +0000 ++++ tools/gcc/.gitignore 2012-10-15 17:30:59.830924531 +0000 +@@ -0,0 +1 @@ ++size_overflow_hash.h +--- tools/gcc/checker_plugin.c 1970-01-01 00:00:00.000000000 +0000 ++++ tools/gcc/checker_plugin.c 2012-10-15 17:30:59.830924531 +0000 +@@ -0,0 +1,171 @@ ++/* ++ * Copyright 2011 by the PaX Team <pageexec@freemail.hu> ++ * Licensed under the GPL v2 ++ * ++ * Note: the choice of the license means that the compilation process is ++ * NOT 'eligible' as defined by gcc's library exception to the GPL v3, ++ * but for the kernel it doesn't matter since it doesn't link against ++ * any of the gcc libraries ++ * ++ * gcc plugin to implement various sparse (source code checker) features ++ * ++ * TODO: ++ * - define separate __iomem, __percpu and __rcu address spaces (lots of code to patch) ++ * ++ * BUGS: ++ * - none known ++ */ ++#include "gcc-plugin.h" ++#include "config.h" ++#include "system.h" ++#include "coretypes.h" ++#include "tree.h" ++#include "tree-pass.h" ++#include "flags.h" ++#include "intl.h" ++#include "toplev.h" ++#include "plugin.h" ++//#include "expr.h" where are you... ++#include "diagnostic.h" ++#include "plugin-version.h" ++#include "tm.h" ++#include "function.h" ++#include "basic-block.h" ++#include "gimple.h" ++#include "rtl.h" ++#include "emit-rtl.h" ++#include "tree-flow.h" ++#include "target.h" ++ ++extern void c_register_addr_space (const char *str, addr_space_t as); ++extern enum machine_mode default_addr_space_pointer_mode (addr_space_t); ++extern enum machine_mode default_addr_space_address_mode (addr_space_t); ++extern bool default_addr_space_valid_pointer_mode(enum machine_mode mode, addr_space_t as); ++extern bool default_addr_space_legitimate_address_p(enum machine_mode mode, rtx mem, bool strict, addr_space_t as); ++extern rtx default_addr_space_legitimize_address(rtx x, rtx oldx, enum machine_mode mode, addr_space_t as); ++ ++extern void print_gimple_stmt(FILE *, gimple, int, int); ++extern rtx emit_move_insn(rtx x, rtx y); ++ ++int plugin_is_GPL_compatible; ++ ++static struct plugin_info checker_plugin_info = { ++ .version = "201111150100", ++}; ++ ++#define ADDR_SPACE_KERNEL 0 ++#define ADDR_SPACE_FORCE_KERNEL 1 ++#define ADDR_SPACE_USER 2 ++#define ADDR_SPACE_FORCE_USER 3 ++#define ADDR_SPACE_IOMEM 0 ++#define ADDR_SPACE_FORCE_IOMEM 0 ++#define ADDR_SPACE_PERCPU 0 ++#define ADDR_SPACE_FORCE_PERCPU 0 ++#define ADDR_SPACE_RCU 0 ++#define ADDR_SPACE_FORCE_RCU 0 ++ ++static enum machine_mode checker_addr_space_pointer_mode(addr_space_t addrspace) ++{ ++ return default_addr_space_pointer_mode(ADDR_SPACE_GENERIC); ++} ++ ++static enum machine_mode checker_addr_space_address_mode(addr_space_t addrspace) ++{ ++ return default_addr_space_address_mode(ADDR_SPACE_GENERIC); ++} ++ ++static bool checker_addr_space_valid_pointer_mode(enum machine_mode mode, addr_space_t as) ++{ ++ return default_addr_space_valid_pointer_mode(mode, as); ++} ++ ++static bool checker_addr_space_legitimate_address_p(enum machine_mode mode, rtx mem, bool strict, addr_space_t as) ++{ ++ return default_addr_space_legitimate_address_p(mode, mem, strict, ADDR_SPACE_GENERIC); ++} ++ ++static rtx checker_addr_space_legitimize_address(rtx x, rtx oldx, enum machine_mode mode, addr_space_t as) ++{ ++ return default_addr_space_legitimize_address(x, oldx, mode, as); ++} ++ ++static bool checker_addr_space_subset_p(addr_space_t subset, addr_space_t superset) ++{ ++ if (subset == ADDR_SPACE_FORCE_KERNEL && superset == ADDR_SPACE_KERNEL) ++ return true; ++ ++ if (subset == ADDR_SPACE_FORCE_USER && superset == ADDR_SPACE_USER) ++ return true; ++ ++ if (subset == ADDR_SPACE_FORCE_IOMEM && superset == ADDR_SPACE_IOMEM) ++ return true; ++ ++ if (subset == ADDR_SPACE_KERNEL && superset == ADDR_SPACE_FORCE_USER) ++ return true; ++ ++ if (subset == ADDR_SPACE_KERNEL && superset == ADDR_SPACE_FORCE_IOMEM) ++ return true; ++ ++ if (subset == ADDR_SPACE_USER && superset == ADDR_SPACE_FORCE_KERNEL) ++ return true; ++ ++ if (subset == ADDR_SPACE_IOMEM && superset == ADDR_SPACE_FORCE_KERNEL) ++ return true; ++ ++ return subset == superset; ++} ++ ++static rtx checker_addr_space_convert(rtx op, tree from_type, tree to_type) ++{ ++// addr_space_t from_as = TYPE_ADDR_SPACE(TREE_TYPE(from_type)); ++// addr_space_t to_as = TYPE_ADDR_SPACE(TREE_TYPE(to_type)); ++ ++ return op; ++} ++ ++static void register_checker_address_spaces(void *event_data, void *data) ++{ ++ c_register_addr_space("__kernel", ADDR_SPACE_KERNEL); ++ c_register_addr_space("__force_kernel", ADDR_SPACE_FORCE_KERNEL); ++ c_register_addr_space("__user", ADDR_SPACE_USER); ++ c_register_addr_space("__force_user", ADDR_SPACE_FORCE_USER); ++// c_register_addr_space("__iomem", ADDR_SPACE_IOMEM); ++// c_register_addr_space("__force_iomem", ADDR_SPACE_FORCE_IOMEM); ++// c_register_addr_space("__percpu", ADDR_SPACE_PERCPU); ++// c_register_addr_space("__force_percpu", ADDR_SPACE_FORCE_PERCPU); ++// c_register_addr_space("__rcu", ADDR_SPACE_RCU); ++// c_register_addr_space("__force_rcu", ADDR_SPACE_FORCE_RCU); ++ ++ targetm.addr_space.pointer_mode = checker_addr_space_pointer_mode; ++ targetm.addr_space.address_mode = checker_addr_space_address_mode; ++ targetm.addr_space.valid_pointer_mode = checker_addr_space_valid_pointer_mode; ++ targetm.addr_space.legitimate_address_p = checker_addr_space_legitimate_address_p; ++// targetm.addr_space.legitimize_address = checker_addr_space_legitimize_address; ++ targetm.addr_space.subset_p = checker_addr_space_subset_p; ++ targetm.addr_space.convert = checker_addr_space_convert; ++} ++ ++int plugin_init(struct plugin_name_args *plugin_info, struct plugin_gcc_version *version) ++{ ++ const char * const plugin_name = plugin_info->base_name; ++ const int argc = plugin_info->argc; ++ const struct plugin_argument * const argv = plugin_info->argv; ++ int i; ++ ++ if (!plugin_default_version_check(version, &gcc_version)) { ++ error(G_("incompatible gcc/plugin versions")); ++ return 1; ++ } ++ ++ register_callback(plugin_name, PLUGIN_INFO, NULL, &checker_plugin_info); ++ ++ for (i = 0; i < argc; ++i) ++ error(G_("unkown option '-fplugin-arg-%s-%s'"), plugin_name, argv[i].key); ++ ++ if (TARGET_64BIT == 0) ++ return 0; ++ ++ register_callback(plugin_name, PLUGIN_PRAGMAS, register_checker_address_spaces, NULL); ++ ++ return 0; ++} +--- tools/gcc/colorize_plugin.c 1970-01-01 00:00:00.000000000 +0000 ++++ tools/gcc/colorize_plugin.c 2012-10-15 17:30:59.830924531 +0000 +@@ -0,0 +1,148 @@ ++/* ++ * Copyright 2012 by PaX Team <pageexec@freemail.hu> ++ * Licensed under the GPL v2 ++ * ++ * Note: the choice of the license means that the compilation process is ++ * NOT 'eligible' as defined by gcc's library exception to the GPL v3, ++ * but for the kernel it doesn't matter since it doesn't link against ++ * any of the gcc libraries ++ * ++ * gcc plugin to colorize diagnostic output ++ * ++ */ ++ ++#include "gcc-plugin.h" ++#include "config.h" ++#include "system.h" ++#include "coretypes.h" ++#include "tree.h" ++#include "tree-pass.h" ++#include "flags.h" ++#include "intl.h" ++#include "toplev.h" ++#include "plugin.h" ++#include "diagnostic.h" ++#include "plugin-version.h" ++#include "tm.h" ++ ++int plugin_is_GPL_compatible; ++ ++static struct plugin_info colorize_plugin_info = { ++ .version = "201203092200", ++ .help = NULL, ++}; ++ ++#define GREEN "\033[32m\033[2m" ++#define LIGHTGREEN "\033[32m\033[1m" ++#define YELLOW "\033[33m\033[2m" ++#define LIGHTYELLOW "\033[33m\033[1m" ++#define RED "\033[31m\033[2m" ++#define LIGHTRED "\033[31m\033[1m" ++#define BLUE "\033[34m\033[2m" ++#define LIGHTBLUE "\033[34m\033[1m" ++#define BRIGHT "\033[m\033[1m" ++#define NORMAL "\033[m" ++ ++static diagnostic_starter_fn old_starter; ++static diagnostic_finalizer_fn old_finalizer; ++ ++static void start_colorize(diagnostic_context *context, diagnostic_info *diagnostic) ++{ ++ const char *color; ++ char *newprefix; ++ ++ switch (diagnostic->kind) { ++ case DK_NOTE: ++ color = LIGHTBLUE; ++ break; ++ ++ case DK_PEDWARN: ++ case DK_WARNING: ++ color = LIGHTYELLOW; ++ break; ++ ++ case DK_ERROR: ++ case DK_FATAL: ++ case DK_ICE: ++ case DK_PERMERROR: ++ case DK_SORRY: ++ color = LIGHTRED; ++ break; ++ ++ default: ++ color = NORMAL; ++ } ++ ++ old_starter(context, diagnostic); ++ if (-1 == asprintf(&newprefix, "%s%s" NORMAL, color, context->printer->prefix)) ++ return; ++ pp_destroy_prefix(context->printer); ++ pp_set_prefix(context->printer, newprefix); ++} ++ ++static void finalize_colorize(diagnostic_context *context, diagnostic_info *diagnostic) ++{ ++ old_finalizer(context, diagnostic); ++} ++ ++static void colorize_arm(void) ++{ ++ old_starter = diagnostic_starter(global_dc); ++ old_finalizer = diagnostic_finalizer(global_dc); ++ ++ diagnostic_starter(global_dc) = start_colorize; ++ diagnostic_finalizer(global_dc) = finalize_colorize; ++} ++ ++static unsigned int execute_colorize_rearm(void) ++{ ++ if (diagnostic_starter(global_dc) == start_colorize) ++ return 0; ++ ++ colorize_arm(); ++ return 0; ++} ++ ++struct simple_ipa_opt_pass pass_ipa_colorize_rearm = { ++ .pass = { ++ .type = SIMPLE_IPA_PASS, ++ .name = "colorize_rearm", ++ .gate = NULL, ++ .execute = execute_colorize_rearm, ++ .sub = NULL, ++ .next = NULL, ++ .static_pass_number = 0, ++ .tv_id = TV_NONE, ++ .properties_required = 0, ++ .properties_provided = 0, ++ .properties_destroyed = 0, ++ .todo_flags_start = 0, ++ .todo_flags_finish = 0 ++ } ++}; ++ ++static void colorize_start_unit(void *gcc_data, void *user_data) ++{ ++ colorize_arm(); ++} ++ ++int plugin_init(struct plugin_name_args *plugin_info, struct plugin_gcc_version *version) ++{ ++ const char * const plugin_name = plugin_info->base_name; ++ struct register_pass_info colorize_rearm_pass_info = { ++ .pass = &pass_ipa_colorize_rearm.pass, ++ .reference_pass_name = "*free_lang_data", ++ .ref_pass_instance_number = 1, ++ .pos_op = PASS_POS_INSERT_AFTER ++ }; ++ ++ if (!plugin_default_version_check(version, &gcc_version)) { ++ error(G_("incompatible gcc/plugin versions")); ++ return 1; ++ } ++ ++ register_callback(plugin_name, PLUGIN_INFO, NULL, &colorize_plugin_info); ++ register_callback(plugin_name, PLUGIN_START_UNIT, &colorize_start_unit, NULL); ++ register_callback(plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL, &colorize_rearm_pass_info); ++ return 0; ++} +--- tools/gcc/constify_plugin.c 1970-01-01 00:00:00.000000000 +0000 ++++ tools/gcc/constify_plugin.c 2012-10-15 17:30:59.830924531 +0000 +@@ -0,0 +1,331 @@ ++/* ++ * Copyright 2011 by Emese Revfy <re.emese@gmail.com> ++ * Copyright 2011 by PaX Team <pageexec@freemail.hu> ++ * Licensed under the GPL v2, or (at your option) v3 ++ * ++ * This gcc plugin constifies all structures which contain only function pointers or are explicitly marked for constification. ++ * ++ * Homepage: ++ * http://www.grsecurity.net/~ephox/const_plugin/ ++ * ++ * Usage: ++ * $ gcc -I`gcc -print-file-name=plugin`/include -fPIC -shared -O2 -o constify_plugin.so constify_plugin.c ++ * $ gcc -fplugin=constify_plugin.so test.c -O2 ++ */ ++ ++#include "gcc-plugin.h" ++#include "config.h" ++#include "system.h" ++#include "coretypes.h" ++#include "tree.h" ++#include "tree-pass.h" ++#include "flags.h" ++#include "intl.h" ++#include "toplev.h" ++#include "plugin.h" ++#include "diagnostic.h" ++#include "plugin-version.h" ++#include "tm.h" ++#include "function.h" ++#include "basic-block.h" ++#include "gimple.h" ++#include "rtl.h" ++#include "emit-rtl.h" ++#include "tree-flow.h" ++ ++#define C_TYPE_FIELDS_READONLY(TYPE) TREE_LANG_FLAG_1(TYPE) ++ ++int plugin_is_GPL_compatible; ++ ++static struct plugin_info const_plugin_info = { ++ .version = "201205300030", ++ .help = "no-constify\tturn off constification\n", ++}; ++ ++static void deconstify_tree(tree node); ++ ++static void deconstify_type(tree type) ++{ ++ tree field; ++ ++ for (field = TYPE_FIELDS(type); field; field = TREE_CHAIN(field)) { ++ tree type = TREE_TYPE(field); ++ ++ if (TREE_CODE(type) != RECORD_TYPE && TREE_CODE(type) != UNION_TYPE) ++ continue; ++ if (!TYPE_READONLY(type)) ++ continue; ++ ++ deconstify_tree(field); ++ } ++ TYPE_READONLY(type) = 0; ++ C_TYPE_FIELDS_READONLY(type) = 0; ++} ++ ++static void deconstify_tree(tree node) ++{ ++ tree old_type, new_type, field; ++ ++ old_type = TREE_TYPE(node); ++ ++ gcc_assert(TYPE_READONLY(old_type) && (TYPE_QUALS(old_type) & TYPE_QUAL_CONST)); ++ ++ new_type = build_qualified_type(old_type, TYPE_QUALS(old_type) & ~TYPE_QUAL_CONST); ++ TYPE_FIELDS(new_type) = copy_list(TYPE_FIELDS(new_type)); ++ for (field = TYPE_FIELDS(new_type); field; field = TREE_CHAIN(field)) ++ DECL_FIELD_CONTEXT(field) = new_type; ++ ++ deconstify_type(new_type); ++ ++ TREE_READONLY(node) = 0; ++ TREE_TYPE(node) = new_type; ++} ++ ++static tree handle_no_const_attribute(tree *node, tree name, tree args, int flags, bool *no_add_attrs) ++{ ++ tree type; ++ ++ *no_add_attrs = true; ++ if (TREE_CODE(*node) == FUNCTION_DECL) { ++ error("%qE attribute does not apply to functions", name); ++ return NULL_TREE; ++ } ++ ++ if (TREE_CODE(*node) == VAR_DECL) { ++ error("%qE attribute does not apply to variables", name); ++ return NULL_TREE; ++ } ++ ++ if (TYPE_P(*node)) { ++ if (TREE_CODE(*node) == RECORD_TYPE || TREE_CODE(*node) == UNION_TYPE) ++ *no_add_attrs = false; ++ else ++ error("%qE attribute applies to struct and union types only", name); ++ return NULL_TREE; ++ } ++ ++ type = TREE_TYPE(*node); ++ ++ if (TREE_CODE(type) != RECORD_TYPE && TREE_CODE(type) != UNION_TYPE) { ++ error("%qE attribute applies to struct and union types only", name); ++ return NULL_TREE; ++ } ++ ++ if (lookup_attribute(IDENTIFIER_POINTER(name), TYPE_ATTRIBUTES(type))) { ++ error("%qE attribute is already applied to the type", name); ++ return NULL_TREE; ++ } ++ ++ if (TREE_CODE(*node) == TYPE_DECL && !TYPE_READONLY(type)) { ++ error("%qE attribute used on type that is not constified", name); ++ return NULL_TREE; ++ } ++ ++ if (TREE_CODE(*node) == TYPE_DECL) { ++ deconstify_tree(*node); ++ return NULL_TREE; ++ } ++ ++ return NULL_TREE; ++} ++ ++static void constify_type(tree type) ++{ ++ TYPE_READONLY(type) = 1; ++ C_TYPE_FIELDS_READONLY(type) = 1; ++} ++ ++static tree handle_do_const_attribute(tree *node, tree name, tree args, int flags, bool *no_add_attrs) ++{ ++ *no_add_attrs = true; ++ if (!TYPE_P(*node)) { ++ error("%qE attribute applies to types only", name); ++ return NULL_TREE; ++ } ++ ++ if (TREE_CODE(*node) != RECORD_TYPE && TREE_CODE(*node) != UNION_TYPE) { ++ error("%qE attribute applies to struct and union types only", name); ++ return NULL_TREE; ++ } ++ ++ *no_add_attrs = false; ++ constify_type(*node); ++ return NULL_TREE; ++} ++ ++static struct attribute_spec no_const_attr = { ++ .name = "no_const", ++ .min_length = 0, ++ .max_length = 0, ++ .decl_required = false, ++ .type_required = false, ++ .function_type_required = false, ++ .handler = handle_no_const_attribute, ++#if BUILDING_GCC_VERSION >= 4007 ++ .affects_type_identity = true ++#endif ++}; ++ ++static struct attribute_spec do_const_attr = { ++ .name = "do_const", ++ .min_length = 0, ++ .max_length = 0, ++ .decl_required = false, ++ .type_required = false, ++ .function_type_required = false, ++ .handler = handle_do_const_attribute, ++#if BUILDING_GCC_VERSION >= 4007 ++ .affects_type_identity = true ++#endif ++}; ++ ++static void register_attributes(void *event_data, void *data) ++{ ++ register_attribute(&no_const_attr); ++ register_attribute(&do_const_attr); ++} ++ ++static bool is_fptr(tree field) ++{ ++ tree ptr = TREE_TYPE(field); ++ ++ if (TREE_CODE(ptr) != POINTER_TYPE) ++ return false; ++ ++ return TREE_CODE(TREE_TYPE(ptr)) == FUNCTION_TYPE; ++} ++ ++static bool walk_struct(tree node) ++{ ++ tree field; ++ ++ if (TYPE_FIELDS(node) == NULL_TREE) ++ return false; ++ ++ if (lookup_attribute("no_const", TYPE_ATTRIBUTES(node))) { ++ gcc_assert(!TYPE_READONLY(node)); ++ deconstify_type(node); ++ return false; ++ } ++ ++ for (field = TYPE_FIELDS(node); field; field = TREE_CHAIN(field)) { ++ tree type = TREE_TYPE(field); ++ enum tree_code code = TREE_CODE(type); ++ ++ if (node == type) ++ return false; ++ if (code == RECORD_TYPE || code == UNION_TYPE) { ++ if (!(walk_struct(type))) ++ return false; ++ } else if (!is_fptr(field) && !TREE_READONLY(field)) ++ return false; ++ } ++ return true; ++} ++ ++static void finish_type(void *event_data, void *data) ++{ ++ tree type = (tree)event_data; ++ ++ if (type == NULL_TREE || type == error_mark_node) ++ return; ++ ++ if (TYPE_READONLY(type)) ++ return; ++ ++ if (walk_struct(type)) ++ constify_type(type); ++} ++ ++static unsigned int check_local_variables(void); ++ ++struct gimple_opt_pass pass_local_variable = { ++ { ++ .type = GIMPLE_PASS, ++ .name = "check_local_variables", ++ .gate = NULL, ++ .execute = check_local_variables, ++ .sub = NULL, ++ .next = NULL, ++ .static_pass_number = 0, ++ .tv_id = TV_NONE, ++ .properties_required = 0, ++ .properties_provided = 0, ++ .properties_destroyed = 0, ++ .todo_flags_start = 0, ++ .todo_flags_finish = 0 ++ } ++}; ++ ++static unsigned int check_local_variables(void) ++{ ++ tree var; ++ referenced_var_iterator rvi; ++ ++#if BUILDING_GCC_VERSION == 4005 ++ FOR_EACH_REFERENCED_VAR(var, rvi) { ++#else ++ FOR_EACH_REFERENCED_VAR(cfun, var, rvi) { ++#endif ++ tree type = TREE_TYPE(var); ++ ++ if (!DECL_P(var) || TREE_STATIC(var) || DECL_EXTERNAL(var)) ++ continue; ++ ++ if (TREE_CODE(type) != RECORD_TYPE && TREE_CODE(type) != UNION_TYPE) ++ continue; ++ ++ if (!TYPE_READONLY(type)) ++ continue; ++ ++// if (lookup_attribute("no_const", DECL_ATTRIBUTES(var))) ++// continue; ++ ++// if (lookup_attribute("no_const", TYPE_ATTRIBUTES(type))) ++// continue; ++ ++ if (walk_struct(type)) { ++ error_at(DECL_SOURCE_LOCATION(var), "constified variable %qE cannot be local", var); ++ return 1; ++ } ++ } ++ return 0; ++} ++ ++int plugin_init(struct plugin_name_args *plugin_info, struct plugin_gcc_version *version) ++{ ++ const char * const plugin_name = plugin_info->base_name; ++ const int argc = plugin_info->argc; ++ const struct plugin_argument * const argv = plugin_info->argv; ++ int i; ++ bool constify = true; ++ ++ struct register_pass_info local_variable_pass_info = { ++ .pass = &pass_local_variable.pass, ++ .reference_pass_name = "*referenced_vars", ++ .ref_pass_instance_number = 1, ++ .pos_op = PASS_POS_INSERT_AFTER ++ }; ++ ++ if (!plugin_default_version_check(version, &gcc_version)) { ++ error(G_("incompatible gcc/plugin versions")); ++ return 1; ++ } ++ ++ for (i = 0; i < argc; ++i) { ++ if (!(strcmp(argv[i].key, "no-constify"))) { ++ constify = false; ++ continue; ++ } ++ error(G_("unkown option '-fplugin-arg-%s-%s'"), plugin_name, argv[i].key); ++ } ++ ++ register_callback(plugin_name, PLUGIN_INFO, NULL, &const_plugin_info); ++ if (constify) { ++ register_callback(plugin_name, PLUGIN_FINISH_TYPE, finish_type, NULL); ++ register_callback(plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL, &local_variable_pass_info); ++ } ++ register_callback(plugin_name, PLUGIN_ATTRIBUTES, register_attributes, NULL); ++ ++ return 0; ++} +--- tools/gcc/generate_size_overflow_hash.sh 1970-01-01 00:00:00.000000000 +0000 ++++ tools/gcc/generate_size_overflow_hash.sh 2012-10-15 17:30:59.830924531 +0000 +@@ -0,0 +1,94 @@ ++#!/bin/bash ++ ++# This script generates the hash table (size_overflow_hash.h) for the size_overflow gcc plugin (size_overflow_plugin.c). ++ ++header1="size_overflow_hash.h" ++database="size_overflow_hash.data" ++n=65536 ++ ++usage() { ++cat <<EOF ++usage: $0 options ++OPTIONS: ++ -h|--help help ++ -o header file ++ -d database file ++ -n hash array size ++EOF ++ return 0 ++} ++ ++while true ++do ++ case "$1" in ++ -h|--help) usage && exit 0;; ++ -n) n=$2; shift 2;; ++ -o) header1="$2"; shift 2;; ++ -d) database="$2"; shift 2;; ++ --) shift 1; break ;; ++ *) break ;; ++ esac ++done ++ ++create_defines() { ++ for i in `seq 1 32` ++ do ++ echo -e "#define PARAM"$i" (1U << "$i")" >> "$header1" ++ done ++ echo >> "$header1" ++} ++ ++create_structs () { ++ rm -f "$header1" ++ ++ create_defines ++ ++ cat "$database" | while read data ++ do ++ data_array=($data) ++ struct_hash_name="${data_array[0]}" ++ funcn="${data_array[1]}" ++ params="${data_array[2]}" ++ next="${data_array[5]}" ++ ++ echo "const struct size_overflow_hash $struct_hash_name = {" >> "$header1" ++ ++ echo -e "\t.next\t= $next,\n\t.name\t= \"$funcn\"," >> "$header1" ++ echo -en "\t.param\t= " >> "$header1" ++ line= ++ for param_num in ${params//-/ }; ++ do ++ line="${line}PARAM"$param_num"|" ++ done ++ ++ echo -e "${line%?},\n};\n" >> "$header1" ++ done ++} ++ ++create_headers () { ++ echo "const struct size_overflow_hash * const size_overflow_hash[$n] = {" >> "$header1" ++} ++ ++create_array_elements () { ++ index=0 ++ grep -v "nohasharray" $database | sort -n -k 4 | while read data ++ do ++ data_array=($data) ++ i="${data_array[3]}" ++ hash="${data_array[4]}" ++ while [[ $index -lt $i ]] ++ do ++ echo -e "\t["$index"]\t= NULL," >> "$header1" ++ index=$(($index + 1)) ++ done ++ index=$(($index + 1)) ++ echo -e "\t["$i"]\t= &"$hash"," >> "$header1" ++ done ++ echo '};' >> $header1 ++} ++ ++create_structs ++create_headers ++create_array_elements ++ ++exit 0 +--- tools/gcc/kallocstat_plugin.c 1970-01-01 00:00:00.000000000 +0000 ++++ tools/gcc/kallocstat_plugin.c 2012-10-15 17:30:59.831924531 +0000 +@@ -0,0 +1,167 @@ ++/* ++ * Copyright 2011 by the PaX Team <pageexec@freemail.hu> ++ * Licensed under the GPL v2 ++ * ++ * Note: the choice of the license means that the compilation process is ++ * NOT 'eligible' as defined by gcc's library exception to the GPL v3, ++ * but for the kernel it doesn't matter since it doesn't link against ++ * any of the gcc libraries ++ * ++ * gcc plugin to find the distribution of k*alloc sizes ++ * ++ * TODO: ++ * ++ * BUGS: ++ * - none known ++ */ ++#include "gcc-plugin.h" ++#include "config.h" ++#include "system.h" ++#include "coretypes.h" ++#include "tree.h" ++#include "tree-pass.h" ++#include "flags.h" ++#include "intl.h" ++#include "toplev.h" ++#include "plugin.h" ++//#include "expr.h" where are you... ++#include "diagnostic.h" ++#include "plugin-version.h" ++#include "tm.h" ++#include "function.h" ++#include "basic-block.h" ++#include "gimple.h" ++#include "rtl.h" ++#include "emit-rtl.h" ++ ++extern void print_gimple_stmt(FILE *, gimple, int, int); ++ ++int plugin_is_GPL_compatible; ++ ++static const char * const kalloc_functions[] = { ++ "__kmalloc", ++ "kmalloc", ++ "kmalloc_large", ++ "kmalloc_node", ++ "kmalloc_order", ++ "kmalloc_order_trace", ++ "kmalloc_slab", ++ "kzalloc", ++ "kzalloc_node", ++}; ++ ++static struct plugin_info kallocstat_plugin_info = { ++ .version = "201111150100", ++}; ++ ++static unsigned int execute_kallocstat(void); ++ ++static struct gimple_opt_pass kallocstat_pass = { ++ .pass = { ++ .type = GIMPLE_PASS, ++ .name = "kallocstat", ++ .gate = NULL, ++ .execute = execute_kallocstat, ++ .sub = NULL, ++ .next = NULL, ++ .static_pass_number = 0, ++ .tv_id = TV_NONE, ++ .properties_required = 0, ++ .properties_provided = 0, ++ .properties_destroyed = 0, ++ .todo_flags_start = 0, ++ .todo_flags_finish = 0 ++ } ++}; ++ ++static bool is_kalloc(const char *fnname) ++{ ++ size_t i; ++ ++ for (i = 0; i < ARRAY_SIZE(kalloc_functions); i++) ++ if (!strcmp(fnname, kalloc_functions[i])) ++ return true; ++ return false; ++} ++ ++static unsigned int execute_kallocstat(void) ++{ ++ basic_block bb; ++ ++ // 1. loop through BBs and GIMPLE statements ++ FOR_EACH_BB(bb) { ++ gimple_stmt_iterator gsi; ++ for (gsi = gsi_start_bb(bb); !gsi_end_p(gsi); gsi_next(&gsi)) { ++ // gimple match: ++ tree fndecl, size; ++ gimple call_stmt; ++ const char *fnname; ++ ++ // is it a call ++ call_stmt = gsi_stmt(gsi); ++ if (!is_gimple_call(call_stmt)) ++ continue; ++ fndecl = gimple_call_fndecl(call_stmt); ++ if (fndecl == NULL_TREE) ++ continue; ++ if (TREE_CODE(fndecl) != FUNCTION_DECL) ++ continue; ++ ++ // is it a call to k*alloc ++ fnname = IDENTIFIER_POINTER(DECL_NAME(fndecl)); ++ if (!is_kalloc(fnname)) ++ continue; ++ ++ // is the size arg the result of a simple const assignment ++ size = gimple_call_arg(call_stmt, 0); ++ while (true) { ++ gimple def_stmt; ++ expanded_location xloc; ++ size_t size_val; ++ ++ if (TREE_CODE(size) != SSA_NAME) ++ break; ++ def_stmt = SSA_NAME_DEF_STMT(size); ++ if (!def_stmt || !is_gimple_assign(def_stmt)) ++ break; ++ if (gimple_num_ops(def_stmt) != 2) ++ break; ++ size = gimple_assign_rhs1(def_stmt); ++ if (!TREE_CONSTANT(size)) ++ continue; ++ xloc = expand_location(gimple_location(def_stmt)); ++ if (!xloc.file) ++ xloc = expand_location(DECL_SOURCE_LOCATION(current_function_decl)); ++ size_val = TREE_INT_CST_LOW(size); ++ fprintf(stderr, "kallocsize: %8zu %8zx %s %s:%u\n", size_val, size_val, fnname, xloc.file, xloc.line); ++ break; ++ } ++//print_gimple_stmt(stderr, call_stmt, 0, TDF_LINENO); ++//debug_tree(gimple_call_fn(call_stmt)); ++//print_node(stderr, "pax", fndecl, 4); ++ } ++ } ++ ++ return 0; ++} ++ ++int plugin_init(struct plugin_name_args *plugin_info, struct plugin_gcc_version *version) ++{ ++ const char * const plugin_name = plugin_info->base_name; ++ struct register_pass_info kallocstat_pass_info = { ++ .pass = &kallocstat_pass.pass, ++ .reference_pass_name = "ssa", ++ .ref_pass_instance_number = 1, ++ .pos_op = PASS_POS_INSERT_AFTER ++ }; ++ ++ if (!plugin_default_version_check(version, &gcc_version)) { ++ error(G_("incompatible gcc/plugin versions")); ++ return 1; ++ } ++ ++ register_callback(plugin_name, PLUGIN_INFO, NULL, &kallocstat_plugin_info); ++ register_callback(plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL, &kallocstat_pass_info); ++ ++ return 0; ++} +--- tools/gcc/kernexec_plugin.c 1970-01-01 00:00:00.000000000 +0000 ++++ tools/gcc/kernexec_plugin.c 2012-10-15 17:30:59.831924531 +0000 +@@ -0,0 +1,427 @@ ++/* ++ * Copyright 2011 by the PaX Team <pageexec@freemail.hu> ++ * Licensed under the GPL v2 ++ * ++ * Note: the choice of the license means that the compilation process is ++ * NOT 'eligible' as defined by gcc's library exception to the GPL v3, ++ * but for the kernel it doesn't matter since it doesn't link against ++ * any of the gcc libraries ++ * ++ * gcc plugin to make KERNEXEC/amd64 almost as good as it is on i386 ++ * ++ * TODO: ++ * ++ * BUGS: ++ * - none known ++ */ ++#include "gcc-plugin.h" ++#include "config.h" ++#include "system.h" ++#include "coretypes.h" ++#include "tree.h" ++#include "tree-pass.h" ++#include "flags.h" ++#include "intl.h" ++#include "toplev.h" ++#include "plugin.h" ++//#include "expr.h" where are you... ++#include "diagnostic.h" ++#include "plugin-version.h" ++#include "tm.h" ++#include "function.h" ++#include "basic-block.h" ++#include "gimple.h" ++#include "rtl.h" ++#include "emit-rtl.h" ++#include "tree-flow.h" ++ ++extern void print_gimple_stmt(FILE *, gimple, int, int); ++extern rtx emit_move_insn(rtx x, rtx y); ++ ++int plugin_is_GPL_compatible; ++ ++static struct plugin_info kernexec_plugin_info = { ++ .version = "201111291120", ++ .help = "method=[bts|or]\tinstrumentation method\n" ++}; ++ ++static unsigned int execute_kernexec_reload(void); ++static unsigned int execute_kernexec_fptr(void); ++static unsigned int execute_kernexec_retaddr(void); ++static bool kernexec_cmodel_check(void); ++ ++static void (*kernexec_instrument_fptr)(gimple_stmt_iterator *); ++static void (*kernexec_instrument_retaddr)(rtx); ++ ++static struct gimple_opt_pass kernexec_reload_pass = { ++ .pass = { ++ .type = GIMPLE_PASS, ++ .name = "kernexec_reload", ++ .gate = kernexec_cmodel_check, ++ .execute = execute_kernexec_reload, ++ .sub = NULL, ++ .next = NULL, ++ .static_pass_number = 0, ++ .tv_id = TV_NONE, ++ .properties_required = 0, ++ .properties_provided = 0, ++ .properties_destroyed = 0, ++ .todo_flags_start = 0, ++ .todo_flags_finish = TODO_verify_ssa | TODO_verify_stmts | TODO_dump_func | TODO_remove_unused_locals | TODO_update_ssa_no_phi ++ } ++}; ++ ++static struct gimple_opt_pass kernexec_fptr_pass = { ++ .pass = { ++ .type = GIMPLE_PASS, ++ .name = "kernexec_fptr", ++ .gate = kernexec_cmodel_check, ++ .execute = execute_kernexec_fptr, ++ .sub = NULL, ++ .next = NULL, ++ .static_pass_number = 0, ++ .tv_id = TV_NONE, ++ .properties_required = 0, ++ .properties_provided = 0, ++ .properties_destroyed = 0, ++ .todo_flags_start = 0, ++ .todo_flags_finish = TODO_verify_ssa | TODO_verify_stmts | TODO_dump_func | TODO_remove_unused_locals | TODO_update_ssa_no_phi ++ } ++}; ++ ++static struct rtl_opt_pass kernexec_retaddr_pass = { ++ .pass = { ++ .type = RTL_PASS, ++ .name = "kernexec_retaddr", ++ .gate = kernexec_cmodel_check, ++ .execute = execute_kernexec_retaddr, ++ .sub = NULL, ++ .next = NULL, ++ .static_pass_number = 0, ++ .tv_id = TV_NONE, ++ .properties_required = 0, ++ .properties_provided = 0, ++ .properties_destroyed = 0, ++ .todo_flags_start = 0, ++ .todo_flags_finish = TODO_dump_func | TODO_ggc_collect ++ } ++}; ++ ++static bool kernexec_cmodel_check(void) ++{ ++ tree section; ++ ++ if (ix86_cmodel != CM_KERNEL) ++ return false; ++ ++ section = lookup_attribute("section", DECL_ATTRIBUTES(current_function_decl)); ++ if (!section || !TREE_VALUE(section)) ++ return true; ++ ++ section = TREE_VALUE(TREE_VALUE(section)); ++ if (strncmp(TREE_STRING_POINTER(section), ".vsyscall_", 10)) ++ return true; ++ ++ return false; ++} ++ ++/* ++ * add special KERNEXEC instrumentation: reload %r10 after it has been clobbered ++ */ ++static void kernexec_reload_fptr_mask(gimple_stmt_iterator *gsi) ++{ ++ gimple asm_movabs_stmt; ++ ++ // build asm volatile("movabs $0x8000000000000000, %%r10\n\t" : : : ); ++ asm_movabs_stmt = gimple_build_asm_vec("movabs $0x8000000000000000, %%r10\n\t", NULL, NULL, NULL, NULL); ++ gimple_asm_set_volatile(asm_movabs_stmt, true); ++ gsi_insert_after(gsi, asm_movabs_stmt, GSI_CONTINUE_LINKING); ++ update_stmt(asm_movabs_stmt); ++} ++ ++/* ++ * find all asm() stmts that clobber r10 and add a reload of r10 ++ */ ++static unsigned int execute_kernexec_reload(void) ++{ ++ basic_block bb; ++ ++ // 1. loop through BBs and GIMPLE statements ++ FOR_EACH_BB(bb) { ++ gimple_stmt_iterator gsi; ++ ++ for (gsi = gsi_start_bb(bb); !gsi_end_p(gsi); gsi_next(&gsi)) { ++ // gimple match: __asm__ ("" : : : "r10"); ++ gimple asm_stmt; ++ size_t nclobbers; ++ ++ // is it an asm ... ++ asm_stmt = gsi_stmt(gsi); ++ if (gimple_code(asm_stmt) != GIMPLE_ASM) ++ continue; ++ ++ // ... clobbering r10 ++ nclobbers = gimple_asm_nclobbers(asm_stmt); ++ while (nclobbers--) { ++ tree op = gimple_asm_clobber_op(asm_stmt, nclobbers); ++ if (strcmp(TREE_STRING_POINTER(TREE_VALUE(op)), "r10")) ++ continue; ++ kernexec_reload_fptr_mask(&gsi); ++//print_gimple_stmt(stderr, asm_stmt, 0, TDF_LINENO); ++ break; ++ } ++ } ++ } ++ ++ return 0; ++} ++ ++/* ++ * add special KERNEXEC instrumentation: force MSB of fptr to 1, which will produce ++ * a non-canonical address from a userland ptr and will just trigger a GPF on dereference ++ */ ++static void kernexec_instrument_fptr_bts(gimple_stmt_iterator *gsi) ++{ ++ gimple assign_intptr, assign_new_fptr, call_stmt; ++ tree intptr, old_fptr, new_fptr, kernexec_mask; ++ ++ call_stmt = gsi_stmt(*gsi); ++ old_fptr = gimple_call_fn(call_stmt); ++ ++ // create temporary unsigned long variable used for bitops and cast fptr to it ++ intptr = create_tmp_var(long_unsigned_type_node, "kernexec_bts"); ++ add_referenced_var(intptr); ++ mark_sym_for_renaming(intptr); ++ assign_intptr = gimple_build_assign(intptr, fold_convert(long_unsigned_type_node, old_fptr)); ++ gsi_insert_before(gsi, assign_intptr, GSI_SAME_STMT); ++ update_stmt(assign_intptr); ++ ++ // apply logical or to temporary unsigned long and bitmask ++ kernexec_mask = build_int_cstu(long_long_unsigned_type_node, 0x8000000000000000LL); ++// kernexec_mask = build_int_cstu(long_long_unsigned_type_node, 0xffffffff80000000LL); ++ assign_intptr = gimple_build_assign(intptr, fold_build2(BIT_IOR_EXPR, long_long_unsigned_type_node, intptr, kernexec_mask)); ++ gsi_insert_before(gsi, assign_intptr, GSI_SAME_STMT); ++ update_stmt(assign_intptr); ++ ++ // cast temporary unsigned long back to a temporary fptr variable ++ new_fptr = create_tmp_var(TREE_TYPE(old_fptr), "kernexec_fptr"); ++ add_referenced_var(new_fptr); ++ mark_sym_for_renaming(new_fptr); ++ assign_new_fptr = gimple_build_assign(new_fptr, fold_convert(TREE_TYPE(old_fptr), intptr)); ++ gsi_insert_before(gsi, assign_new_fptr, GSI_SAME_STMT); ++ update_stmt(assign_new_fptr); ++ ++ // replace call stmt fn with the new fptr ++ gimple_call_set_fn(call_stmt, new_fptr); ++ update_stmt(call_stmt); ++} ++ ++static void kernexec_instrument_fptr_or(gimple_stmt_iterator *gsi) ++{ ++ gimple asm_or_stmt, call_stmt; ++ tree old_fptr, new_fptr, input, output; ++ VEC(tree, gc) *inputs = NULL; ++ VEC(tree, gc) *outputs = NULL; ++ ++ call_stmt = gsi_stmt(*gsi); ++ old_fptr = gimple_call_fn(call_stmt); ++ ++ // create temporary fptr variable ++ new_fptr = create_tmp_var(TREE_TYPE(old_fptr), "kernexec_or"); ++ add_referenced_var(new_fptr); ++ mark_sym_for_renaming(new_fptr); ++ ++ // build asm volatile("orq %%r10, %0\n\t" : "=r"(new_fptr) : "0"(old_fptr)); ++ input = build_tree_list(NULL_TREE, build_string(2, "0")); ++ input = chainon(NULL_TREE, build_tree_list(input, old_fptr)); ++ output = build_tree_list(NULL_TREE, build_string(3, "=r")); ++ output = chainon(NULL_TREE, build_tree_list(output, new_fptr)); ++ VEC_safe_push(tree, gc, inputs, input); ++ VEC_safe_push(tree, gc, outputs, output); ++ asm_or_stmt = gimple_build_asm_vec("orq %%r10, %0\n\t", inputs, outputs, NULL, NULL); ++ gimple_asm_set_volatile(asm_or_stmt, true); ++ gsi_insert_before(gsi, asm_or_stmt, GSI_SAME_STMT); ++ update_stmt(asm_or_stmt); ++ ++ // replace call stmt fn with the new fptr ++ gimple_call_set_fn(call_stmt, new_fptr); ++ update_stmt(call_stmt); ++} ++ ++/* ++ * find all C level function pointer dereferences and forcibly set the highest bit of the pointer ++ */ ++static unsigned int execute_kernexec_fptr(void) ++{ ++ basic_block bb; ++ ++ // 1. loop through BBs and GIMPLE statements ++ FOR_EACH_BB(bb) { ++ gimple_stmt_iterator gsi; ++ ++ for (gsi = gsi_start_bb(bb); !gsi_end_p(gsi); gsi_next(&gsi)) { ++ // gimple match: h_1 = get_fptr (); D.2709_3 = h_1 (x_2(D)); ++ tree fn; ++ gimple call_stmt; ++ ++ // is it a call ... ++ call_stmt = gsi_stmt(gsi); ++ if (!is_gimple_call(call_stmt)) ++ continue; ++ fn = gimple_call_fn(call_stmt); ++ if (TREE_CODE(fn) == ADDR_EXPR) ++ continue; ++ if (TREE_CODE(fn) != SSA_NAME) ++ gcc_unreachable(); ++ ++ // ... through a function pointer ++ fn = SSA_NAME_VAR(fn); ++ if (TREE_CODE(fn) != VAR_DECL && TREE_CODE(fn) != PARM_DECL) ++ continue; ++ fn = TREE_TYPE(fn); ++ if (TREE_CODE(fn) != POINTER_TYPE) ++ continue; ++ fn = TREE_TYPE(fn); ++ if (TREE_CODE(fn) != FUNCTION_TYPE) ++ continue; ++ ++ kernexec_instrument_fptr(&gsi); ++ ++//debug_tree(gimple_call_fn(call_stmt)); ++//print_gimple_stmt(stderr, call_stmt, 0, TDF_LINENO); ++ } ++ } ++ ++ return 0; ++} ++ ++// add special KERNEXEC instrumentation: btsq $63,(%rsp) just before retn ++static void kernexec_instrument_retaddr_bts(rtx insn) ++{ ++ rtx btsq; ++ rtvec argvec, constraintvec, labelvec; ++ int line; ++ ++ // create asm volatile("btsq $63,(%%rsp)":::) ++ argvec = rtvec_alloc(0); ++ constraintvec = rtvec_alloc(0); ++ labelvec = rtvec_alloc(0); ++ line = expand_location(RTL_LOCATION(insn)).line; ++ btsq = gen_rtx_ASM_OPERANDS(VOIDmode, "btsq $63,(%%rsp)", empty_string, 0, argvec, constraintvec, labelvec, line); ++ MEM_VOLATILE_P(btsq) = 1; ++// RTX_FRAME_RELATED_P(btsq) = 1; // not for ASM_OPERANDS ++ emit_insn_before(btsq, insn); ++} ++ ++// add special KERNEXEC instrumentation: orq %r10,(%rsp) just before retn ++static void kernexec_instrument_retaddr_or(rtx insn) ++{ ++ rtx orq; ++ rtvec argvec, constraintvec, labelvec; ++ int line; ++ ++ // create asm volatile("orq %%r10,(%%rsp)":::) ++ argvec = rtvec_alloc(0); ++ constraintvec = rtvec_alloc(0); ++ labelvec = rtvec_alloc(0); ++ line = expand_location(RTL_LOCATION(insn)).line; ++ orq = gen_rtx_ASM_OPERANDS(VOIDmode, "orq %%r10,(%%rsp)", empty_string, 0, argvec, constraintvec, labelvec, line); ++ MEM_VOLATILE_P(orq) = 1; ++// RTX_FRAME_RELATED_P(orq) = 1; // not for ASM_OPERANDS ++ emit_insn_before(orq, insn); ++} ++ ++/* ++ * find all asm level function returns and forcibly set the highest bit of the return address ++ */ ++static unsigned int execute_kernexec_retaddr(void) ++{ ++ rtx insn; ++ ++ // 1. find function returns ++ for (insn = get_insns(); insn; insn = NEXT_INSN(insn)) { ++ // rtl match: (jump_insn 41 40 42 2 (return) fptr.c:42 634 {return_internal} (nil)) ++ // (jump_insn 12 9 11 2 (parallel [ (return) (unspec [ (0) ] UNSPEC_REP) ]) fptr.c:46 635 {return_internal_long} (nil)) ++ rtx body; ++ ++ // is it a retn ++ if (!JUMP_P(insn)) ++ continue; ++ body = PATTERN(insn); ++ if (GET_CODE(body) == PARALLEL) ++ body = XVECEXP(body, 0, 0); ++ if (GET_CODE(body) != RETURN) ++ continue; ++ kernexec_instrument_retaddr(insn); ++ } ++ ++// print_simple_rtl(stderr, get_insns()); ++// print_rtl(stderr, get_insns()); ++ ++ return 0; ++} ++ ++int plugin_init(struct plugin_name_args *plugin_info, struct plugin_gcc_version *version) ++{ ++ const char * const plugin_name = plugin_info->base_name; ++ const int argc = plugin_info->argc; ++ const struct plugin_argument * const argv = plugin_info->argv; ++ int i; ++ struct register_pass_info kernexec_reload_pass_info = { ++ .pass = &kernexec_reload_pass.pass, ++ .reference_pass_name = "ssa", ++ .ref_pass_instance_number = 1, ++ .pos_op = PASS_POS_INSERT_AFTER ++ }; ++ struct register_pass_info kernexec_fptr_pass_info = { ++ .pass = &kernexec_fptr_pass.pass, ++ .reference_pass_name = "ssa", ++ .ref_pass_instance_number = 1, ++ .pos_op = PASS_POS_INSERT_AFTER ++ }; ++ struct register_pass_info kernexec_retaddr_pass_info = { ++ .pass = &kernexec_retaddr_pass.pass, ++ .reference_pass_name = "pro_and_epilogue", ++ .ref_pass_instance_number = 1, ++ .pos_op = PASS_POS_INSERT_AFTER ++ }; ++ ++ if (!plugin_default_version_check(version, &gcc_version)) { ++ error(G_("incompatible gcc/plugin versions")); ++ return 1; ++ } ++ ++ register_callback(plugin_name, PLUGIN_INFO, NULL, &kernexec_plugin_info); ++ ++ if (TARGET_64BIT == 0) ++ return 0; ++ ++ for (i = 0; i < argc; ++i) { ++ if (!strcmp(argv[i].key, "method")) { ++ if (!argv[i].value) { ++ error(G_("no value supplied for option '-fplugin-arg-%s-%s'"), plugin_name, argv[i].key); ++ continue; ++ } ++ if (!strcmp(argv[i].value, "bts")) { ++ kernexec_instrument_fptr = kernexec_instrument_fptr_bts; ++ kernexec_instrument_retaddr = kernexec_instrument_retaddr_bts; ++ } else if (!strcmp(argv[i].value, "or")) { ++ kernexec_instrument_fptr = kernexec_instrument_fptr_or; ++ kernexec_instrument_retaddr = kernexec_instrument_retaddr_or; ++ fix_register("r10", 1, 1); ++ } else ++ error(G_("invalid option argument '-fplugin-arg-%s-%s=%s'"), plugin_name, argv[i].key, argv[i].value); ++ continue; ++ } ++ error(G_("unkown option '-fplugin-arg-%s-%s'"), plugin_name, argv[i].key); ++ } ++ if (!kernexec_instrument_fptr || !kernexec_instrument_retaddr) ++ error(G_("no instrumentation method was selected via '-fplugin-arg-%s-method'"), plugin_name); ++ ++ if (kernexec_instrument_fptr == kernexec_instrument_fptr_or) ++ register_callback(plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL, &kernexec_reload_pass_info); ++ register_callback(plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL, &kernexec_fptr_pass_info); ++ register_callback(plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL, &kernexec_retaddr_pass_info); ++ ++ return 0; ++} +--- tools/gcc/latent_entropy_plugin.c 1970-01-01 00:00:00.000000000 +0000 ++++ tools/gcc/latent_entropy_plugin.c 2012-10-15 17:30:59.831924531 +0000 +@@ -0,0 +1,295 @@ ++/* ++ * Copyright 2012 by the PaX Team <pageexec@freemail.hu> ++ * Licensed under the GPL v2 ++ * ++ * Note: the choice of the license means that the compilation process is ++ * NOT 'eligible' as defined by gcc's library exception to the GPL v3, ++ * but for the kernel it doesn't matter since it doesn't link against ++ * any of the gcc libraries ++ * ++ * gcc plugin to help generate a little bit of entropy from program state, ++ * used during boot in the kernel ++ * ++ * TODO: ++ * - add ipa pass to identify not explicitly marked candidate functions ++ * - mix in more program state (function arguments/return values, loop variables, etc) ++ * - more instrumentation control via attribute parameters ++ * ++ * BUGS: ++ * - LTO needs -flto-partition=none for now ++ */ ++#include "gcc-plugin.h" ++#include "config.h" ++#include "system.h" ++#include "coretypes.h" ++#include "tree.h" ++#include "tree-pass.h" ++#include "flags.h" ++#include "intl.h" ++#include "toplev.h" ++#include "plugin.h" ++//#include "expr.h" where are you... ++#include "diagnostic.h" ++#include "plugin-version.h" ++#include "tm.h" ++#include "function.h" ++#include "basic-block.h" ++#include "gimple.h" ++#include "rtl.h" ++#include "emit-rtl.h" ++#include "tree-flow.h" ++ ++int plugin_is_GPL_compatible; ++ ++static tree latent_entropy_decl; ++ ++static struct plugin_info latent_entropy_plugin_info = { ++ .version = "201207271820", ++ .help = NULL ++}; ++ ++static unsigned int execute_latent_entropy(void); ++static bool gate_latent_entropy(void); ++ ++static struct gimple_opt_pass latent_entropy_pass = { ++ .pass = { ++ .type = GIMPLE_PASS, ++ .name = "latent_entropy", ++ .gate = gate_latent_entropy, ++ .execute = execute_latent_entropy, ++ .sub = NULL, ++ .next = NULL, ++ .static_pass_number = 0, ++ .tv_id = TV_NONE, ++ .properties_required = PROP_gimple_leh | PROP_cfg, ++ .properties_provided = 0, ++ .properties_destroyed = 0, ++ .todo_flags_start = 0, //TODO_verify_ssa | TODO_verify_flow | TODO_verify_stmts, ++ .todo_flags_finish = TODO_verify_ssa | TODO_verify_stmts | TODO_dump_func | TODO_update_ssa ++ } ++}; ++ ++static tree handle_latent_entropy_attribute(tree *node, tree name, tree args, int flags, bool *no_add_attrs) ++{ ++ if (TREE_CODE(*node) != FUNCTION_DECL) { ++ *no_add_attrs = true; ++ error("%qE attribute only applies to functions", name); ++ } ++ return NULL_TREE; ++} ++ ++static struct attribute_spec latent_entropy_attr = { ++ .name = "latent_entropy", ++ .min_length = 0, ++ .max_length = 0, ++ .decl_required = true, ++ .type_required = false, ++ .function_type_required = false, ++ .handler = handle_latent_entropy_attribute, ++#if BUILDING_GCC_VERSION >= 4007 ++ .affects_type_identity = false ++#endif ++}; ++ ++static void register_attributes(void *event_data, void *data) ++{ ++ register_attribute(&latent_entropy_attr); ++} ++ ++static bool gate_latent_entropy(void) ++{ ++ tree latent_entropy_attr; ++ ++ latent_entropy_attr = lookup_attribute("latent_entropy", DECL_ATTRIBUTES(current_function_decl)); ++ return latent_entropy_attr != NULL_TREE; ++} ++ ++static unsigned HOST_WIDE_INT seed; ++static unsigned HOST_WIDE_INT get_random_const(void) ++{ ++ seed = (seed >> 1U) ^ (-(seed & 1ULL) & 0xD800000000000000ULL); ++ return seed; ++} ++ ++static enum tree_code get_op(tree *rhs) ++{ ++ static enum tree_code op; ++ unsigned HOST_WIDE_INT random_const; ++ ++ random_const = get_random_const(); ++ ++ switch (op) { ++ case BIT_XOR_EXPR: ++ op = PLUS_EXPR; ++ break; ++ ++ case PLUS_EXPR: ++ if (rhs) { ++ op = LROTATE_EXPR; ++ random_const &= HOST_BITS_PER_WIDE_INT - 1; ++ break; ++ } ++ ++ case LROTATE_EXPR: ++ default: ++ op = BIT_XOR_EXPR; ++ break; ++ } ++ if (rhs) ++ *rhs = build_int_cstu(unsigned_intDI_type_node, random_const); ++ return op; ++} ++ ++static void perturb_local_entropy(basic_block bb, tree local_entropy) ++{ ++ gimple_stmt_iterator gsi; ++ gimple assign; ++ tree addxorrol, rhs; ++ enum tree_code op; ++ ++ op = get_op(&rhs); ++ addxorrol = fold_build2_loc(UNKNOWN_LOCATION, op, unsigned_intDI_type_node, local_entropy, rhs); ++ assign = gimple_build_assign(local_entropy, addxorrol); ++ find_referenced_vars_in(assign); ++//debug_bb(bb); ++ gsi = gsi_after_labels(bb); ++ gsi_insert_before(&gsi, assign, GSI_NEW_STMT); ++ update_stmt(assign); ++} ++ ++static void perturb_latent_entropy(basic_block bb, tree rhs) ++{ ++ gimple_stmt_iterator gsi; ++ gimple assign; ++ tree addxorrol, temp; ++ ++ // 1. create temporary copy of latent_entropy ++ temp = create_tmp_var(unsigned_intDI_type_node, "temp_latent_entropy"); ++ add_referenced_var(temp); ++ mark_sym_for_renaming(temp); ++ ++ // 2. read... ++ assign = gimple_build_assign(temp, latent_entropy_decl); ++ find_referenced_vars_in(assign); ++ gsi = gsi_after_labels(bb); ++ gsi_insert_after(&gsi, assign, GSI_NEW_STMT); ++ update_stmt(assign); ++ ++ // 3. ...modify... ++ addxorrol = fold_build2_loc(UNKNOWN_LOCATION, get_op(NULL), unsigned_intDI_type_node, temp, rhs); ++ assign = gimple_build_assign(temp, addxorrol); ++ find_referenced_vars_in(assign); ++ gsi_insert_after(&gsi, assign, GSI_NEW_STMT); ++ update_stmt(assign); ++ ++ // 4. ...write latent_entropy ++ assign = gimple_build_assign(latent_entropy_decl, temp); ++ find_referenced_vars_in(assign); ++ gsi_insert_after(&gsi, assign, GSI_NEW_STMT); ++ update_stmt(assign); ++} ++ ++static unsigned int execute_latent_entropy(void) ++{ ++ basic_block bb; ++ gimple assign; ++ gimple_stmt_iterator gsi; ++ tree local_entropy; ++ ++ if (!latent_entropy_decl) { ++ struct varpool_node *node; ++ ++ for (node = varpool_nodes; node; node = node->next) { ++ tree var = node->decl; ++ if (strcmp(IDENTIFIER_POINTER(DECL_NAME(var)), "latent_entropy")) ++ continue; ++ latent_entropy_decl = var; ++// debug_tree(var); ++ break; ++ } ++ if (!latent_entropy_decl) { ++// debug_tree(current_function_decl); ++ return 0; ++ } ++ } ++ ++//fprintf(stderr, "latent_entropy: %s\n", IDENTIFIER_POINTER(DECL_NAME(current_function_decl))); ++ ++ // 1. create local entropy variable ++ local_entropy = create_tmp_var(unsigned_intDI_type_node, "local_entropy"); ++ add_referenced_var(local_entropy); ++ mark_sym_for_renaming(local_entropy); ++ ++ // 2. initialize local entropy variable ++ bb = split_block_after_labels(ENTRY_BLOCK_PTR)->dest; ++ if (dom_info_available_p(CDI_DOMINATORS)) ++ set_immediate_dominator(CDI_DOMINATORS, bb, ENTRY_BLOCK_PTR); ++ gsi = gsi_start_bb(bb); ++ ++ assign = gimple_build_assign(local_entropy, build_int_cstu(unsigned_intDI_type_node, get_random_const())); ++// gimple_set_location(assign, loc); ++ find_referenced_vars_in(assign); ++ gsi_insert_after(&gsi, assign, GSI_NEW_STMT); ++ update_stmt(assign); ++ bb = bb->next_bb; ++ ++ // 3. instrument each BB with an operation on the local entropy variable ++ while (bb != EXIT_BLOCK_PTR) { ++ perturb_local_entropy(bb, local_entropy); ++ bb = bb->next_bb; ++ }; ++ ++ // 4. mix local entropy into the global entropy variable ++ perturb_latent_entropy(EXIT_BLOCK_PTR->prev_bb, local_entropy); ++ return 0; ++} ++ ++static void start_unit_callback(void *gcc_data, void *user_data) ++{ ++#if BUILDING_GCC_VERSION >= 4007 ++ seed = get_random_seed(false); ++#else ++ sscanf(get_random_seed(false), "%" HOST_WIDE_INT_PRINT "x", &seed); ++ seed *= seed; ++#endif ++ ++ if (in_lto_p) ++ return; ++ ++ // extern u64 latent_entropy ++ latent_entropy_decl = build_decl(UNKNOWN_LOCATION, VAR_DECL, get_identifier("latent_entropy"), unsigned_intDI_type_node); ++ ++ TREE_STATIC(latent_entropy_decl) = 1; ++ TREE_PUBLIC(latent_entropy_decl) = 1; ++ TREE_USED(latent_entropy_decl) = 1; ++ TREE_THIS_VOLATILE(latent_entropy_decl) = 1; ++ DECL_EXTERNAL(latent_entropy_decl) = 1; ++ DECL_ARTIFICIAL(latent_entropy_decl) = 0; ++ DECL_INITIAL(latent_entropy_decl) = NULL; ++// DECL_ASSEMBLER_NAME(latent_entropy_decl); ++// varpool_finalize_decl(latent_entropy_decl); ++// varpool_mark_needed_node(latent_entropy_decl); ++} ++ ++int plugin_init(struct plugin_name_args *plugin_info, struct plugin_gcc_version *version) ++{ ++ const char * const plugin_name = plugin_info->base_name; ++ struct register_pass_info latent_entropy_pass_info = { ++ .pass = &latent_entropy_pass.pass, ++ .reference_pass_name = "optimized", ++ .ref_pass_instance_number = 1, ++ .pos_op = PASS_POS_INSERT_BEFORE ++ }; ++ ++ if (!plugin_default_version_check(version, &gcc_version)) { ++ error(G_("incompatible gcc/plugin versions")); ++ return 1; ++ } ++ ++ register_callback(plugin_name, PLUGIN_INFO, NULL, &latent_entropy_plugin_info); ++ register_callback ("start_unit", PLUGIN_START_UNIT, &start_unit_callback, NULL); ++ register_callback(plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL, &latent_entropy_pass_info); ++ register_callback(plugin_name, PLUGIN_ATTRIBUTES, register_attributes, NULL); ++ ++ return 0; ++} +--- tools/gcc/size_overflow_hash.data 1970-01-01 00:00:00.000000000 +0000 ++++ tools/gcc/size_overflow_hash.data 2012-10-15 17:30:59.834924531 +0000 +@@ -0,0 +1,3597 @@ ++_000001_hash alloc_dr 2 65495 _000001_hash NULL ++_000002_hash __copy_from_user 3 10918 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42703 _003718_hash NULL ++_003719_hash vb2_write 3 31948 _003719_hash NULL ++_003720_hash vfio_pci_set_msi_trigger 3-4 26507 _003720_hash NULL ++_003722_hash viafb_iga1_odev_proc_write 3 36241 _003722_hash NULL ++_003723_hash viafb_iga2_odev_proc_write 3 2363 _003723_hash NULL ++_003724_hash __videobuf_alloc_cached 1 12740 _003724_hash NULL ++_003725_hash __videobuf_alloc_uncached 1 55711 _003725_hash NULL ++_003726_hash __videobuf_copy_stream 4 44769 _003726_hash NULL ++_003727_hash videobuf_read_one 3 31637 _003727_hash NULL ++_003728_hash video_ioctl2 2 21380 _003728_hash NULL ++_003729_hash vmap 2 15025 _003729_hash NULL ++_003730_hash vmw_cursor_update_dmabuf 3-4 32045 _003730_hash NULL ++_003732_hash vmw_gmr_bind 3 44130 _003732_hash NULL ++_003733_hash xd_read_multiple_pages 4-5 11422 _003733_hash NULL ++_003735_hash xd_write_multiple_pages 5-6 53633 _003735_hash NULL ++_003737_hash xenfb_write 3 43412 _003737_hash NULL ++_003738_hash arch_gnttab_map_shared 3 41306 _003738_hash NULL ++_003739_hash arch_gnttab_map_status 3 49812 _003739_hash NULL ++_003740_hash bttv_read 3 11432 _003740_hash NULL ++_003741_hash cx18_read 3 23699 _003741_hash NULL ++_003742_hash cx2341x_ctrl_new_menu 3 49700 _003742_hash NULL ++_003743_hash cx2341x_ctrl_new_std 4 57061 _003743_hash NULL ++_003744_hash cx25821_video_ioctl 2 30188 _003744_hash NULL ++_003745_hash dt3155_read 3 59226 _003745_hash NULL ++_003746_hash ioremap_cache 1-2 47189 _003746_hash NULL ++_003748_hash ioremap_nocache 1-2 2439 _003748_hash NULL ++_003750_hash ioremap_prot 1-2 51764 _003750_hash &_003711_hash ++_003752_hash ioremap_wc 1-2 62695 _003752_hash NULL ++_003754_hash ivtv_read_pos 3 34400 _003754_hash &_000312_hash ++_003755_hash mcam_v4l_read 3 36513 _003755_hash NULL ++_003756_hash ms_rw_multi_sector 3-4 7459 _003756_hash NULL ++_003758_hash pvr2_v4l2_ioctl 2 24398 _003758_hash &_000877_hash ++_003759_hash ramoops_init_prz 5 12134 _003759_hash NULL ++_003761_hash ttm_bo_kmap_ttm 3 5922 _003761_hash NULL ++_003762_hash uf_ap_process_data_pdu 7 25860 _003762_hash NULL ++_003763_hash vb2_fop_read 3 24080 _003763_hash NULL ++_003764_hash vb2_fop_write 3 30420 _003764_hash NULL ++_003765_hash videobuf_read_stream 3 14956 _003765_hash NULL ++_003766_hash video_read 3 28148 _003766_hash NULL ++_003767_hash vmw_du_crtc_cursor_set 4-5 28479 _003767_hash NULL ++_003769_hash xd_rw 3-4 49020 _003769_hash NULL ++_003771_hash zoran_ioctl 2 30465 _003771_hash NULL ++_003772_hash zr364xx_read 3 2354 _003772_hash NULL ++_003773_hash acpi_os_ioremap 1-2 49523 _003773_hash NULL ++_003775_hash au0828_v4l2_read 3 40220 _003775_hash NULL ++_003776_hash ca91cx42_alloc_resource 2 10502 _003776_hash NULL ++_003778_hash cx18_read_pos 3 4683 _003778_hash NULL ++_003779_hash cx18_v4l2_read 3 21196 _003779_hash NULL ++_003780_hash cx231xx_v4l2_read 3 55014 _003780_hash NULL ++_003781_hash devm_ioremap_nocache 2-3 2036 _003781_hash NULL ++_003783_hash do_test 1 15766 _003783_hash NULL ++_003784_hash __einj_error_trigger 1 17707 _003784_hash &_001764_hash ++_003785_hash em28xx_v4l2_read 3 16701 _003785_hash NULL ++_003786_hash init_chip_wc_pat 2 62768 _003786_hash NULL ++_003787_hash intel_render_ring_init_dri 2-3 45446 _003787_hash NULL ++_003789_hash io_mapping_create_wc 1-2 1354 _003789_hash NULL ++_003791_hash iommu_map_mmio_space 1 30919 _003791_hash NULL ++_003792_hash ioremap 1-2 23172 _003792_hash NULL ++_003794_hash ivtv_v4l2_read 3 1964 _003794_hash NULL ++_003795_hash mga_ioremap 1-2 8571 _003795_hash NULL ++_003797_hash mpeg_read 3 6708 _003797_hash NULL ++_003798_hash msix_map_region 3 3411 _003798_hash NULL ++_003799_hash ms_rw 3-4 17220 _003799_hash NULL ++_003801_hash pci_iomap 3 47575 _003801_hash NULL ++_003802_hash pd_video_read 3 24510 _003802_hash NULL ++_003803_hash sfi_map_memory 1-2 5183 _003803_hash NULL ++_003805_hash solo_enc_read 3 33553 _003805_hash NULL ++_003806_hash solo_v4l2_read 3 59247 _003806_hash NULL ++_003807_hash timblogiw_read 3 48305 _003807_hash NULL ++_003808_hash tm6000_read 3 4151 _003808_hash NULL ++_003809_hash tsi148_alloc_resource 2 24563 _003809_hash NULL ++_003810_hash ttm_bo_ioremap 2-3 31082 _003810_hash NULL ++_003812_hash ttm_bo_kmap 3-2 60118 _003812_hash NULL ++_003813_hash vb2_vmalloc_get_userptr 3 31374 _003813_hash NULL ++_003814_hash vbi_read 3 63673 _003814_hash NULL ++_003815_hash viacam_read 3 54526 _003815_hash NULL ++_003816_hash xlate_dev_mem_ptr 1 15291 _003816_hash &_001231_hash ++_003817_hash a4t_cs_init 3 27734 _003817_hash NULL ++_003818_hash aac_nark_ioremap 2 50163 _003818_hash &_000323_hash ++_003819_hash aac_rkt_ioremap 2 3333 _003819_hash NULL ++_003820_hash aac_rx_ioremap 2 52410 _003820_hash NULL ++_003821_hash aac_sa_ioremap 2 13596 _003821_hash &_000299_hash ++_003822_hash aac_src_ioremap 2 41688 _003822_hash NULL ++_003823_hash aac_srcv_ioremap 2 6659 _003823_hash NULL ++_003824_hash acpi_map 1-2 58725 _003824_hash NULL ++_003826_hash acpi_os_read_memory 1-3 54186 _003826_hash NULL ++_003828_hash acpi_os_write_memory 1-3 56416 _003828_hash &_003429_hash ++_003830_hash atyfb_setup_generic 3 49151 _003830_hash NULL ++_003831_hash ca91cx42_master_set 4 23146 _003831_hash NULL ++_003832_hash check_mirror 1-2 57342 _003832_hash &_001753_hash ++_003834_hash cycx_setup 4 47562 _003834_hash NULL ++_003835_hash devm_ioremap 2-3 29235 _003835_hash NULL ++_003837_hash divasa_remap_pci_bar 3-4 23485 _003837_hash &_000979_hash ++_003839_hash doc_probe 1 23285 _003839_hash NULL ++_003840_hash DoC_Probe 1 57534 _003840_hash NULL ++_003841_hash efi_ioremap 1-2 3492 _003841_hash &_001137_hash ++_003843_hash ems_pcmcia_add_card 2 62627 _003843_hash NULL ++_003844_hash isp1760_register 1-2 628 _003844_hash NULL ++_003846_hash mid_get_vbt_data_r0 2 10876 _003846_hash NULL ++_003847_hash mid_get_vbt_data_r10 2 6308 _003847_hash NULL ++_003848_hash mid_get_vbt_data_r1 2 26170 _003848_hash NULL ++_003849_hash mthca_map_reg 2-3 5664 _003849_hash NULL ++_003851_hash mthca_setup_cmd_doorbells 2 53954 _003851_hash NULL ++_003852_hash netxen_nic_map_indirect_address_128M 2 42257 _003852_hash NULL ++_003853_hash pcim_iomap 3 58334 _003853_hash NULL ++_003854_hash persistent_ram_iomap 1-2 47156 _003854_hash NULL ++_003856_hash read_vbt_r0 1 503 _003856_hash NULL ++_003857_hash read_vbt_r10 1 60679 _003857_hash NULL ++_003858_hash register_device 2-3 60015 _003858_hash NULL ++_003860_hash remap_pci_mem 1-2 15966 _003860_hash NULL ++_003862_hash rtl_port_map 1-2 2385 _003862_hash NULL ++_003864_hash sfi_map_table 1 5462 _003864_hash NULL ++_003865_hash sriov_enable_migration 2 14889 _003865_hash NULL ++_003866_hash ssb_bus_scan 2 36578 _003866_hash NULL ++_003867_hash ssb_ioremap 2 5228 _003867_hash NULL ++_003868_hash tpci200_slot_map_space 2 3848 _003868_hash NULL ++_003869_hash tpm_tis_init 2-3 15304 _003869_hash NULL ++_003871_hash tsi148_master_set 4 14685 _003871_hash NULL ++_003872_hash acpi_os_map_memory 1-2 11161 _003872_hash NULL ++_003874_hash com90xx_found 3 13974 _003874_hash NULL ++_003875_hash netxen_nic_hw_read_wx_128M 2 26858 _003875_hash NULL ++_003876_hash netxen_nic_hw_write_wx_128M 2 33488 _003876_hash NULL ++_003877_hash sfi_check_table 1 6772 _003877_hash NULL ++_003878_hash sfi_sysfs_install_table 1 51688 _003878_hash NULL ++_003879_hash sriov_enable 2 59689 _003879_hash NULL ++_003880_hash ssb_bus_register 3 65183 _003880_hash NULL ++_003881_hash acpi_ex_system_memory_space_handler 2 31192 _003881_hash NULL ++_003882_hash acpi_tb_check_xsdt 1 21862 _003882_hash NULL ++_003883_hash acpi_tb_install_table 1 12988 _003883_hash NULL ++_003884_hash acpi_tb_parse_root_table 1 53455 _003884_hash NULL ++_003885_hash check_vendor_extension 1 3254 _003885_hash NULL ++_003886_hash pci_enable_sriov 2 35745 _003886_hash NULL ++_003887_hash ssb_bus_pcmciabus_register 3 56020 _003887_hash NULL ++_003888_hash ssb_bus_ssbbus_register 2 2217 _003888_hash NULL ++_003889_hash lpfc_sli_probe_sriov_nr_virtfn 2 26004 _003889_hash NULL ++_003890_hash alloc_vm_area 1 36149 _003890_hash NULL ++_003891_hash cma_create_area 2 38642 _003891_hash NULL ++_003893_hash fbcon_prepare_logo 5 6246 _003893_hash NULL ++_003894_hash io_mapping_map_wc 2 19284 _003894_hash NULL ++_003895_hash nfs_dns_resolve_name 3 25036 _003895_hash NULL ++_003896_hash nfs_parse_server_name 2 1899 _003896_hash NULL +--- tools/gcc/size_overflow_plugin.c 1970-01-01 00:00:00.000000000 +0000 ++++ tools/gcc/size_overflow_plugin.c 2012-10-15 17:30:59.835924531 +0000 +@@ -0,0 +1,1879 @@ ++/* ++ * Copyright 2011, 2012 by Emese Revfy <re.emese@gmail.com> ++ * Licensed under the GPL v2, or (at your option) v3 ++ * ++ * Homepage: ++ * http://www.grsecurity.net/~ephox/overflow_plugin/ ++ * ++ * This plugin recomputes expressions of function arguments marked by a size_overflow attribute ++ * with double integer precision (DImode/TImode for 32/64 bit integer types). ++ * The recomputed argument is checked against TYPE_MAX and an event is logged on overflow and the triggering process is killed. ++ * ++ * Usage: ++ * $ gcc -I`gcc -print-file-name=plugin`/include/c-family -I`gcc -print-file-name=plugin`/include -fPIC -shared -O2 -ggdb -Wall -W -Wno-missing-field-initializers -o size_overflow_plugin.so size_overflow_plugin.c ++ * $ gcc -fplugin=size_overflow_plugin.so test.c -O2 ++ */ ++ ++#include "gcc-plugin.h" ++#include "config.h" ++#include "system.h" ++#include "coretypes.h" ++#include "tree.h" ++#include "tree-pass.h" ++#include "intl.h" ++#include "plugin-version.h" ++#include "tm.h" ++#include "toplev.h" ++#include "function.h" ++#include "tree-flow.h" ++#include "plugin.h" ++#include "gimple.h" ++#include "c-common.h" ++#include "diagnostic.h" ++#include "cfgloop.h" ++ ++#if BUILDING_GCC_VERSION >= 4007 ++#include "c-tree.h" ++#else ++#define C_DECL_IMPLICIT(EXP) DECL_LANG_FLAG_2 (EXP) ++#endif ++ ++struct size_overflow_hash { ++ const struct size_overflow_hash * const next; ++ const char * const name; ++ const unsigned int param; ++}; ++ ++#include "size_overflow_hash.h" ++ ++enum marked { ++ MARKED_NO, MARKED_YES, MARKED_NOT_INTENTIONAL ++}; ++ ++#define __unused __attribute__((__unused__)) ++#define NAME(node) IDENTIFIER_POINTER(DECL_NAME(node)) ++#define NAME_LEN(node) IDENTIFIER_LENGTH(DECL_NAME(node)) ++#define BEFORE_STMT true ++#define AFTER_STMT false ++#define CREATE_NEW_VAR NULL_TREE ++#define CODES_LIMIT 32 ++#define MAX_PARAM 32 ++#define MY_STMT GF_PLF_1 ++#define NO_CAST_CHECK GF_PLF_2 ++ ++#if BUILDING_GCC_VERSION == 4005 ++#define DECL_CHAIN(NODE) (TREE_CHAIN(DECL_MINIMAL_CHECK(NODE))) ++#endif ++ ++int plugin_is_GPL_compatible; ++void debug_gimple_stmt(gimple gs); ++ ++static tree expand(struct pointer_set_t *visited, tree lhs); ++static bool pre_expand(struct pointer_set_t *visited, const_tree lhs); ++static tree report_size_overflow_decl; ++static const_tree const_char_ptr_type_node; ++static unsigned int handle_function(void); ++static void check_size_overflow(gimple stmt, tree size_overflow_type, tree cast_rhs, tree rhs, bool before); ++static tree get_size_overflow_type(gimple stmt, const_tree node); ++static tree dup_assign(struct pointer_set_t *visited, gimple oldstmt, tree size_overflow_type, tree rhs1, tree rhs2, tree __unused rhs3); ++ ++static struct plugin_info size_overflow_plugin_info = { ++ .version = "20120930beta", ++ .help = "no-size-overflow\tturn off size overflow checking\n", ++}; ++ ++static tree handle_size_overflow_attribute(tree *node, tree __unused name, tree args, int __unused flags, bool *no_add_attrs) ++{ ++ unsigned int arg_count; ++ enum tree_code code = TREE_CODE(*node); ++ ++ switch (code) { ++ case FUNCTION_DECL: ++ arg_count = type_num_arguments(TREE_TYPE(*node)); ++ break; ++ case FUNCTION_TYPE: ++ case METHOD_TYPE: ++ arg_count = type_num_arguments(*node); ++ break; ++ default: ++ *no_add_attrs = true; ++ error("%s: %qE attribute only applies to functions", __func__, name); ++ return NULL_TREE; ++ } ++ ++ for (; args; args = TREE_CHAIN(args)) { ++ tree position = TREE_VALUE(args); ++ if (TREE_CODE(position) != INTEGER_CST || TREE_INT_CST_HIGH(position) || TREE_INT_CST_LOW(position) < 1 || TREE_INT_CST_LOW(position) > arg_count ) { ++ error("%s: parameter %u is outside range.", __func__, (unsigned int)TREE_INT_CST_LOW(position)); ++ *no_add_attrs = true; ++ } ++ } ++ return NULL_TREE; ++} ++ ++static const char* get_asm_name(tree node) ++{ ++ return IDENTIFIER_POINTER(DECL_ASSEMBLER_NAME(node)); ++} ++ ++static tree handle_intentional_overflow_attribute(tree *node, tree __unused name, tree args, int __unused flags, bool *no_add_attrs) ++{ ++ unsigned int arg_count, arg_num; ++ enum tree_code code = TREE_CODE(*node); ++ ++ switch (code) { ++ case FUNCTION_DECL: ++ arg_count = type_num_arguments(TREE_TYPE(*node)); ++ break; ++ case FUNCTION_TYPE: ++ case METHOD_TYPE: ++ arg_count = type_num_arguments(*node); ++ break; ++ case FIELD_DECL: ++ arg_num = TREE_INT_CST_LOW(TREE_VALUE(args)); ++ if (arg_num != 0) { ++ *no_add_attrs = true; ++ error("%s: %qE attribute parameter can only be 0 in structure fields", __func__, name); ++ } ++ return NULL_TREE; ++ default: ++ *no_add_attrs = true; ++ error("%qE attribute only applies to functions", name); ++ return NULL_TREE; ++ } ++ ++ for (; args; args = TREE_CHAIN(args)) { ++ tree position = TREE_VALUE(args); ++ if (TREE_CODE(position) != INTEGER_CST || TREE_INT_CST_HIGH(position) || TREE_INT_CST_LOW(position) > arg_count ) { ++ error("%s: parameter %u is outside range.", __func__, (unsigned int)TREE_INT_CST_LOW(position)); ++ *no_add_attrs = true; ++ } ++ } ++ return NULL_TREE; ++} ++ ++static struct attribute_spec size_overflow_attr = { ++ .name = "size_overflow", ++ .min_length = 1, ++ .max_length = -1, ++ .decl_required = true, ++ .type_required = false, ++ .function_type_required = false, ++ .handler = handle_size_overflow_attribute, ++#if BUILDING_GCC_VERSION >= 4007 ++ .affects_type_identity = false ++#endif ++}; ++ ++static struct attribute_spec intentional_overflow_attr = { ++ .name = "intentional_overflow", ++ .min_length = 1, ++ .max_length = -1, ++ .decl_required = true, ++ .type_required = false, ++ .function_type_required = false, ++ .handler = handle_intentional_overflow_attribute, ++#if BUILDING_GCC_VERSION >= 4007 ++ .affects_type_identity = false ++#endif ++}; ++ ++static void register_attributes(void __unused *event_data, void __unused *data) ++{ ++ register_attribute(&size_overflow_attr); ++ register_attribute(&intentional_overflow_attr); ++} ++ ++// http://www.team5150.com/~andrew/noncryptohashzoo2~/CrapWow.html ++static unsigned int CrapWow(const char *key, unsigned int len, unsigned int seed) ++{ ++#define cwfold( a, b, lo, hi ) { p = (unsigned int)(a) * (unsigned long long)(b); lo ^= (unsigned int)p; hi ^= (unsigned int)(p >> 32); } ++#define cwmixa( in ) { cwfold( in, m, k, h ); } ++#define cwmixb( in ) { cwfold( in, n, h, k ); } ++ ++ unsigned int m = 0x57559429; ++ unsigned int n = 0x5052acdb; ++ const unsigned int *key4 = (const unsigned int *)key; ++ unsigned int h = len; ++ unsigned int k = len + seed + n; ++ unsigned long long p; ++ ++ while (len >= 8) { ++ cwmixb(key4[0]) cwmixa(key4[1]) key4 += 2; ++ len -= 8; ++ } ++ if (len >= 4) { ++ cwmixb(key4[0]) key4 += 1; ++ len -= 4; ++ } ++ if (len) ++ cwmixa(key4[0] & ((1 << (len * 8)) - 1 )); ++ cwmixb(h ^ (k + n)); ++ return k ^ h; ++ ++#undef cwfold ++#undef cwmixa ++#undef cwmixb ++} ++ ++static inline unsigned int get_hash_num(const char *fndecl, const char *tree_codes, unsigned int len, unsigned int seed) ++{ ++ unsigned int fn = CrapWow(fndecl, strlen(fndecl), seed) & 0xffff; ++ unsigned int codes = CrapWow(tree_codes, len, seed) & 0xffff; ++ return fn ^ codes; ++} ++ ++static inline tree get_original_function_decl(tree fndecl) ++{ ++ if (DECL_ABSTRACT_ORIGIN(fndecl)) ++ return DECL_ABSTRACT_ORIGIN(fndecl); ++ return fndecl; ++} ++ ++static inline gimple get_def_stmt(const_tree node) ++{ ++ gcc_assert(node != NULL_TREE); ++ gcc_assert(TREE_CODE(node) == SSA_NAME); ++ return SSA_NAME_DEF_STMT(node); ++} ++ ++static unsigned char get_tree_code(const_tree type) ++{ ++ switch (TREE_CODE(type)) { ++ case ARRAY_TYPE: ++ return 0; ++ case BOOLEAN_TYPE: ++ return 1; ++ case ENUMERAL_TYPE: ++ return 2; ++ case FUNCTION_TYPE: ++ return 3; ++ case INTEGER_TYPE: ++ return 4; ++ case POINTER_TYPE: ++ return 5; ++ case RECORD_TYPE: ++ return 6; ++ case UNION_TYPE: ++ return 7; ++ case VOID_TYPE: ++ return 8; ++ case REAL_TYPE: ++ return 9; ++ case VECTOR_TYPE: ++ return 10; ++ case REFERENCE_TYPE: ++ return 11; ++ case OFFSET_TYPE: ++ return 12; ++ case COMPLEX_TYPE: ++ return 13; ++ default: ++ debug_tree((tree)type); ++ gcc_unreachable(); ++ } ++} ++ ++static size_t add_type_codes(const_tree type, unsigned char *tree_codes, size_t len) ++{ ++ gcc_assert(type != NULL_TREE); ++ ++ while (type && len < CODES_LIMIT) { ++ tree_codes[len] = get_tree_code(type); ++ len++; ++ type = TREE_TYPE(type); ++ } ++ return len; ++} ++ ++static unsigned int get_function_decl(const_tree fndecl, unsigned char *tree_codes) ++{ ++ const_tree arg, result, arg_field, type = TREE_TYPE(fndecl); ++ enum tree_code code = TREE_CODE(type); ++ size_t len = 0; ++ ++ gcc_assert(code == FUNCTION_TYPE || code == METHOD_TYPE); ++ ++ arg = TYPE_ARG_TYPES(type); ++ // skip builtins __builtin_constant_p ++ if (!arg && DECL_BUILT_IN(fndecl)) ++ return 0; ++ ++ if (TREE_CODE_CLASS(code) == tcc_type) ++ result = type; ++ else ++ result = DECL_RESULT(fndecl); ++ ++ gcc_assert(result != NULL_TREE); ++ len = add_type_codes(TREE_TYPE(result), tree_codes, len); ++ ++ if (arg == NULL_TREE) { ++ gcc_assert(CODE_CONTAINS_STRUCT(TREE_CODE(fndecl), TS_DECL_NON_COMMON)); ++ arg_field = DECL_ARGUMENT_FLD(fndecl); ++ if (arg_field == NULL_TREE) ++ return 0; ++ arg = TREE_TYPE(arg_field); ++ len = add_type_codes(arg, tree_codes, len); ++ gcc_assert(len != 0); ++ return len; ++ } ++ ++ gcc_assert(arg != NULL_TREE && TREE_CODE(arg) == TREE_LIST); ++ while (arg && len < CODES_LIMIT) { ++ len = add_type_codes(TREE_VALUE(arg), tree_codes, len); ++ arg = TREE_CHAIN(arg); ++ } ++ ++ gcc_assert(len != 0); ++ return len; ++} ++ ++static const struct size_overflow_hash *get_function_hash(tree fndecl) ++{ ++ unsigned int hash; ++ const struct size_overflow_hash *entry; ++ unsigned char tree_codes[CODES_LIMIT]; ++ size_t len; ++ const char *func_name = get_asm_name(fndecl); ++ ++ len = get_function_decl(fndecl, tree_codes); ++ if (len == 0) ++ return NULL; ++ ++ hash = get_hash_num(func_name, (const char*) tree_codes, len, 0); ++ ++ entry = size_overflow_hash[hash]; ++ while (entry) { ++ if (!strcmp(entry->name, func_name)) ++ return entry; ++ entry = entry->next; ++ } ++ ++ return NULL; ++} ++ ++static void check_arg_type(const_tree arg) ++{ ++ const_tree type = TREE_TYPE(arg); ++ enum tree_code code = TREE_CODE(type); ++ ++ gcc_assert(code == INTEGER_TYPE || code == ENUMERAL_TYPE || ++ (code == POINTER_TYPE && TREE_CODE(TREE_TYPE(type)) == VOID_TYPE) || ++ (code == POINTER_TYPE && TREE_CODE(TREE_TYPE(type)) == INTEGER_TYPE)); ++} ++ ++static int find_arg_number(const_tree arg, tree func) ++{ ++ tree var; ++ unsigned int argnum = 1; ++ ++ if (TREE_CODE(arg) == SSA_NAME) ++ arg = SSA_NAME_VAR(arg); ++ ++ for (var = DECL_ARGUMENTS(func); var; var = TREE_CHAIN(var)) { ++ if (strcmp(NAME(arg), NAME(var))) { ++ argnum++; ++ continue; ++ } ++ check_arg_type(var); ++ return argnum; ++ } ++ gcc_unreachable(); ++} ++ ++static tree create_new_var(tree type) ++{ ++ tree new_var = create_tmp_var(type, "cicus"); ++ ++ add_referenced_var(new_var); ++ mark_sym_for_renaming(new_var); ++ return new_var; ++} ++ ++static gimple create_binary_assign(enum tree_code code, gimple stmt, tree rhs1, tree rhs2) ++{ ++ gimple assign; ++ gimple_stmt_iterator gsi = gsi_for_stmt(stmt); ++ tree type = TREE_TYPE(rhs1); ++ tree lhs = create_new_var(type); ++ ++ assign = gimple_build_assign_with_ops(code, lhs, rhs1, rhs2); ++ gimple_set_lhs(assign, make_ssa_name(lhs, assign)); ++ ++ gsi_insert_before(&gsi, assign, GSI_NEW_STMT); ++ update_stmt(assign); ++ gimple_set_plf(assign, MY_STMT, true); ++ return assign; ++} ++ ++static bool is_bool(const_tree node) ++{ ++ const_tree type; ++ ++ if (node == NULL_TREE) ++ return false; ++ ++ type = TREE_TYPE(node); ++ if (!INTEGRAL_TYPE_P(type)) ++ return false; ++ if (TREE_CODE(type) == BOOLEAN_TYPE) ++ return true; ++ if (TYPE_PRECISION(type) == 1) ++ return true; ++ return false; ++} ++ ++static tree cast_a_tree(tree type, tree var) ++{ ++ gcc_assert(type != NULL_TREE); ++ gcc_assert(var != NULL_TREE); ++ gcc_assert(fold_convertible_p(type, var)); ++ ++ return fold_convert(type, var); ++} ++ ++static gimple build_cast_stmt(tree dst_type, tree rhs, tree lhs, gimple_stmt_iterator *gsi, bool before) ++{ ++ gimple assign; ++ ++ gcc_assert(dst_type != NULL_TREE && rhs != NULL_TREE); ++ if (gsi_end_p(*gsi) && before == AFTER_STMT) ++ gcc_unreachable(); ++ ++ if (lhs == CREATE_NEW_VAR) ++ lhs = create_new_var(dst_type); ++ ++ assign = gimple_build_assign(lhs, cast_a_tree(dst_type, rhs)); ++ ++ if (!gsi_end_p(*gsi)) { ++ location_t loc = gimple_location(gsi_stmt(*gsi)); ++ gimple_set_location(assign, loc); ++ } ++ ++ gimple_set_lhs(assign, make_ssa_name(lhs, assign)); ++ ++ if (before) ++ gsi_insert_before(gsi, assign, GSI_NEW_STMT); ++ else ++ gsi_insert_after(gsi, assign, GSI_NEW_STMT); ++ update_stmt(assign); ++ gimple_set_plf(assign, MY_STMT, true); ++ ++ return assign; ++} ++ ++static tree cast_to_new_size_overflow_type(gimple stmt, tree new_rhs1, tree size_overflow_type, bool before) ++{ ++ const_gimple assign; ++ gimple_stmt_iterator gsi; ++ ++ if (new_rhs1 == NULL_TREE) ++ return NULL_TREE; ++ ++ if (!useless_type_conversion_p(TREE_TYPE(new_rhs1), size_overflow_type)) { ++ gsi = gsi_for_stmt(stmt); ++ assign = build_cast_stmt(size_overflow_type, new_rhs1, CREATE_NEW_VAR, &gsi, before); ++ return gimple_get_lhs(assign); ++ } ++ return new_rhs1; ++} ++ ++static tree follow_overflow_type_and_dup(struct pointer_set_t *visited, gimple stmt, const_tree node, tree new_rhs1, tree new_rhs2, tree new_rhs3) ++{ ++ tree size_overflow_type = get_size_overflow_type(stmt, node); ++ ++ new_rhs1 = cast_to_new_size_overflow_type(stmt, new_rhs1, size_overflow_type, BEFORE_STMT); ++ ++ if (new_rhs2 != NULL_TREE) ++ new_rhs2 = cast_to_new_size_overflow_type(stmt, new_rhs2, size_overflow_type, BEFORE_STMT); ++ ++ if (new_rhs3 != NULL_TREE) ++ new_rhs3 = cast_to_new_size_overflow_type(stmt, new_rhs3, size_overflow_type, BEFORE_STMT); ++ ++ return dup_assign(visited, stmt, size_overflow_type, new_rhs1, new_rhs2, new_rhs3); ++} ++ ++ ++static tree create_assign(struct pointer_set_t *visited, gimple oldstmt, tree rhs1, bool before) ++{ ++ tree size_overflow_type, lhs; ++ gimple stmt; ++ gimple_stmt_iterator gsi; ++ ++ if (rhs1 == NULL_TREE) { ++ debug_gimple_stmt(oldstmt); ++ error("%s: rhs1 is NULL_TREE", __func__); ++ gcc_unreachable(); ++ } ++ ++ if (gimple_code(oldstmt) == GIMPLE_ASM) ++ lhs = rhs1; ++ else ++ lhs = gimple_get_lhs(oldstmt); ++ ++ gsi = gsi_for_stmt(oldstmt); ++ pointer_set_insert(visited, oldstmt); ++ if (lookup_stmt_eh_lp(oldstmt) != 0) { ++ basic_block next_bb, cur_bb; ++ const_edge e; ++ ++ gcc_assert(before == false); ++ gcc_assert(stmt_can_throw_internal(oldstmt)); ++ gcc_assert(gimple_code(oldstmt) == GIMPLE_CALL); ++ gcc_assert(!gsi_end_p(gsi)); ++ ++ cur_bb = gimple_bb(oldstmt); ++ next_bb = cur_bb->next_bb; ++ e = find_edge(cur_bb, next_bb); ++ gcc_assert(e != NULL); ++ gcc_assert(e->flags & EDGE_FALLTHRU); ++ ++ gsi = gsi_after_labels(next_bb); ++ gcc_assert(!gsi_end_p(gsi)); ++ ++ before = true; ++ oldstmt = gsi_stmt(gsi); ++ } ++ ++ size_overflow_type = get_size_overflow_type(oldstmt, lhs); ++ ++ stmt = build_cast_stmt(size_overflow_type, rhs1, CREATE_NEW_VAR, &gsi, before); ++ gimple_set_plf(stmt, MY_STMT, true); ++ return gimple_get_lhs(stmt); ++} ++ ++static tree dup_assign(struct pointer_set_t *visited, gimple oldstmt, tree size_overflow_type, tree rhs1, tree rhs2, tree __unused rhs3) ++{ ++ gimple stmt; ++ gimple_stmt_iterator gsi; ++ tree new_var, lhs = gimple_get_lhs(oldstmt); ++ ++ if (gimple_plf(oldstmt, MY_STMT)) ++ return lhs; ++ ++ if (gimple_num_ops(oldstmt) != 4 && rhs1 == NULL_TREE) { ++ rhs1 = gimple_assign_rhs1(oldstmt); ++ rhs1 = create_assign(visited, oldstmt, rhs1, BEFORE_STMT); ++ } ++ if (gimple_num_ops(oldstmt) == 3 && rhs2 == NULL_TREE) { ++ rhs2 = gimple_assign_rhs2(oldstmt); ++ rhs2 = create_assign(visited, oldstmt, rhs2, BEFORE_STMT); ++ } ++ ++ stmt = gimple_copy(oldstmt); ++ gimple_set_location(stmt, gimple_location(oldstmt)); ++ gimple_set_plf(stmt, MY_STMT, true); ++ ++ if (gimple_assign_rhs_code(oldstmt) == WIDEN_MULT_EXPR) ++ gimple_assign_set_rhs_code(stmt, MULT_EXPR); ++ ++ if (is_bool(lhs)) ++ new_var = SSA_NAME_VAR(lhs); ++ else ++ new_var = create_new_var(size_overflow_type); ++ new_var = make_ssa_name(new_var, stmt); ++ gimple_set_lhs(stmt, new_var); ++ ++ if (rhs1 != NULL_TREE) { ++ if (!gimple_assign_cast_p(oldstmt)) ++ rhs1 = cast_a_tree(size_overflow_type, rhs1); ++ gimple_assign_set_rhs1(stmt, rhs1); ++ } ++ ++ if (rhs2 != NULL_TREE) ++ gimple_assign_set_rhs2(stmt, rhs2); ++#if BUILDING_GCC_VERSION >= 4007 ++ if (rhs3 != NULL_TREE) ++ gimple_assign_set_rhs3(stmt, rhs3); ++#endif ++ gimple_set_vuse(stmt, gimple_vuse(oldstmt)); ++ gimple_set_vdef(stmt, gimple_vdef(oldstmt)); ++ ++ gsi = gsi_for_stmt(oldstmt); ++ gsi_insert_after(&gsi, stmt, GSI_SAME_STMT); ++ update_stmt(stmt); ++ pointer_set_insert(visited, oldstmt); ++ return gimple_get_lhs(stmt); ++} ++ ++static gimple overflow_create_phi_node(gimple oldstmt, tree result) ++{ ++ basic_block bb; ++ gimple phi; ++ gimple_stmt_iterator gsi = gsi_for_stmt(oldstmt); ++ ++ bb = gsi_bb(gsi); ++ ++ phi = create_phi_node(result, bb); ++ gsi = gsi_last(phi_nodes(bb)); ++ gsi_remove(&gsi, false); ++ ++ gsi = gsi_for_stmt(oldstmt); ++ gsi_insert_after(&gsi, phi, GSI_NEW_STMT); ++ gimple_set_bb(phi, bb); ++ gimple_set_plf(phi, MY_STMT, true); ++ return phi; ++} ++ ++static basic_block create_a_first_bb(void) ++{ ++ basic_block first_bb; ++ ++ first_bb = split_block_after_labels(ENTRY_BLOCK_PTR)->dest; ++ if (dom_info_available_p(CDI_DOMINATORS)) ++ set_immediate_dominator(CDI_DOMINATORS, first_bb, ENTRY_BLOCK_PTR); ++ return first_bb; ++} ++ ++static tree cast_old_phi_arg(gimple oldstmt, tree size_overflow_type, tree arg, tree new_var, unsigned int i) ++{ ++ basic_block bb; ++ const_gimple newstmt; ++ gimple_stmt_iterator gsi; ++ bool before = BEFORE_STMT; ++ ++ if (TREE_CODE(arg) == SSA_NAME && gimple_code(get_def_stmt(arg)) != GIMPLE_NOP) { ++ gsi = gsi_for_stmt(get_def_stmt(arg)); ++ newstmt = build_cast_stmt(size_overflow_type, arg, new_var, &gsi, AFTER_STMT); ++ return gimple_get_lhs(newstmt); ++ } ++ ++ bb = gimple_phi_arg_edge(oldstmt, i)->src; ++ gsi = gsi_after_labels(bb); ++ if (bb->index == 0) { ++ bb = create_a_first_bb(); ++ gsi = gsi_start_bb(bb); ++ } ++ newstmt = build_cast_stmt(size_overflow_type, arg, new_var, &gsi, before); ++ return gimple_get_lhs(newstmt); ++} ++ ++static const_gimple handle_new_phi_arg(const_tree arg, tree new_var, tree new_rhs) ++{ ++ gimple newstmt; ++ gimple_stmt_iterator gsi; ++ void (*gsi_insert)(gimple_stmt_iterator *, gimple, enum gsi_iterator_update); ++ gimple def_newstmt = get_def_stmt(new_rhs); ++ ++ gsi_insert = gsi_insert_after; ++ gsi = gsi_for_stmt(def_newstmt); ++ ++ switch (gimple_code(get_def_stmt(arg))) { ++ case GIMPLE_PHI: ++ newstmt = gimple_build_assign(new_var, new_rhs); ++ gsi = gsi_after_labels(gimple_bb(def_newstmt)); ++ gsi_insert = gsi_insert_before; ++ break; ++ case GIMPLE_ASM: ++ case GIMPLE_CALL: ++ newstmt = gimple_build_assign(new_var, new_rhs); ++ break; ++ case GIMPLE_ASSIGN: ++ newstmt = gimple_build_assign(new_var, gimple_get_lhs(def_newstmt)); ++ break; ++ default: ++ /* unknown gimple_code (handle_build_new_phi_arg) */ ++ gcc_unreachable(); ++ } ++ ++ gimple_set_lhs(newstmt, make_ssa_name(new_var, newstmt)); ++ gsi_insert(&gsi, newstmt, GSI_NEW_STMT); ++ gimple_set_plf(newstmt, MY_STMT, true); ++ update_stmt(newstmt); ++ return newstmt; ++} ++ ++static tree build_new_phi_arg(struct pointer_set_t *visited, tree size_overflow_type, tree arg, tree new_var) ++{ ++ const_gimple newstmt; ++ gimple def_stmt; ++ tree new_rhs; ++ ++ new_rhs = expand(visited, arg); ++ if (new_rhs == NULL_TREE) ++ return NULL_TREE; ++ ++ def_stmt = get_def_stmt(new_rhs); ++ if (gimple_code(def_stmt) == GIMPLE_NOP) ++ return NULL_TREE; ++ new_rhs = cast_to_new_size_overflow_type(def_stmt, new_rhs, size_overflow_type, AFTER_STMT); ++ ++ newstmt = handle_new_phi_arg(arg, new_var, new_rhs); ++ return gimple_get_lhs(newstmt); ++} ++ ++static tree build_new_phi(struct pointer_set_t *visited, tree orig_result) ++{ ++ gimple phi, oldstmt = get_def_stmt(orig_result); ++ tree new_result, size_overflow_type; ++ unsigned int i; ++ unsigned int n = gimple_phi_num_args(oldstmt); ++ ++ size_overflow_type = get_size_overflow_type(oldstmt, orig_result); ++ ++ new_result = create_new_var(size_overflow_type); ++ ++ pointer_set_insert(visited, oldstmt); ++ phi = overflow_create_phi_node(oldstmt, new_result); ++ for (i = 0; i < n; i++) { ++ tree arg, lhs; ++ ++ arg = gimple_phi_arg_def(oldstmt, i); ++ if (is_gimple_constant(arg)) ++ arg = cast_a_tree(size_overflow_type, arg); ++ lhs = build_new_phi_arg(visited, size_overflow_type, arg, new_result); ++ if (lhs == NULL_TREE) ++ lhs = cast_old_phi_arg(oldstmt, size_overflow_type, arg, new_result, i); ++ add_phi_arg(phi, lhs, gimple_phi_arg_edge(oldstmt, i), gimple_location(oldstmt)); ++ } ++ ++ update_stmt(phi); ++ return gimple_phi_result(phi); ++} ++ ++static tree change_assign_rhs(gimple stmt, const_tree orig_rhs, tree new_rhs) ++{ ++ const_gimple assign; ++ gimple_stmt_iterator gsi = gsi_for_stmt(stmt); ++ tree origtype = TREE_TYPE(orig_rhs); ++ ++ gcc_assert(gimple_code(stmt) == GIMPLE_ASSIGN); ++ ++ assign = build_cast_stmt(origtype, new_rhs, CREATE_NEW_VAR, &gsi, BEFORE_STMT); ++ return gimple_get_lhs(assign); ++} ++ ++static void change_rhs1(gimple stmt, tree new_rhs1) ++{ ++ tree assign_rhs; ++ const_tree rhs = gimple_assign_rhs1(stmt); ++ ++ assign_rhs = change_assign_rhs(stmt, rhs, new_rhs1); ++ gimple_assign_set_rhs1(stmt, assign_rhs); ++ update_stmt(stmt); ++} ++ ++static bool check_mode_type(const_gimple stmt) ++{ ++ const_tree lhs = gimple_get_lhs(stmt); ++ const_tree lhs_type = TREE_TYPE(lhs); ++ const_tree rhs_type = TREE_TYPE(gimple_assign_rhs1(stmt)); ++ enum machine_mode lhs_mode = TYPE_MODE(lhs_type); ++ enum machine_mode rhs_mode = TYPE_MODE(rhs_type); ++ ++ if (rhs_mode == lhs_mode && TYPE_UNSIGNED(rhs_type) == TYPE_UNSIGNED(lhs_type)) ++ return false; ++ ++ if (rhs_mode == SImode && lhs_mode == DImode && (TYPE_UNSIGNED(rhs_type) || !TYPE_UNSIGNED(lhs_type))) ++ return false; ++ ++ return true; ++} ++ ++static bool check_undefined_integer_operation(const_gimple stmt) ++{ ++ const_gimple def_stmt; ++ const_tree lhs = gimple_get_lhs(stmt); ++ const_tree rhs1 = gimple_assign_rhs1(stmt); ++ const_tree rhs1_type = TREE_TYPE(rhs1); ++ const_tree lhs_type = TREE_TYPE(lhs); ++ ++ if (TYPE_MODE(rhs1_type) != TYPE_MODE(lhs_type) || TYPE_UNSIGNED(rhs1_type) == TYPE_UNSIGNED(lhs_type)) ++ return false; ++ ++ def_stmt = get_def_stmt(rhs1); ++ if (gimple_code(def_stmt) != GIMPLE_ASSIGN) ++ return false; ++ ++ if (gimple_assign_rhs_code(def_stmt) != MINUS_EXPR) ++ return false; ++ return true; ++} ++ ++static bool is_a_cast_and_const_overflow(const_tree no_const_rhs) ++{ ++ const_tree rhs1, lhs, rhs1_type, lhs_type; ++ enum machine_mode lhs_mode, rhs_mode; ++ gimple def_stmt = get_def_stmt(no_const_rhs); ++ ++ if (!gimple_assign_cast_p(def_stmt)) ++ return false; ++ ++ rhs1 = gimple_assign_rhs1(def_stmt); ++ lhs = gimple_get_lhs(def_stmt); ++ rhs1_type = TREE_TYPE(rhs1); ++ lhs_type = TREE_TYPE(lhs); ++ rhs_mode = TYPE_MODE(rhs1_type); ++ lhs_mode = TYPE_MODE(lhs_type); ++ if (TYPE_UNSIGNED(lhs_type) == TYPE_UNSIGNED(rhs1_type) || lhs_mode != rhs_mode) ++ return false; ++ ++ return true; ++} ++ ++static tree handle_unary_rhs(struct pointer_set_t *visited, gimple stmt) ++{ ++ tree size_overflow_type, lhs = gimple_get_lhs(stmt); ++ tree new_rhs1, rhs1 = gimple_assign_rhs1(stmt); ++ const_tree rhs1_type = TREE_TYPE(rhs1); ++ const_tree lhs_type = TREE_TYPE(lhs); ++ ++ new_rhs1 = expand(visited, rhs1); ++ ++ if (new_rhs1 == NULL_TREE || TREE_CODE(rhs1_type) == POINTER_TYPE) ++ return create_assign(visited, stmt, lhs, AFTER_STMT); ++ ++ if (gimple_plf(stmt, MY_STMT)) ++ return lhs; ++ ++ if (gimple_plf(stmt, NO_CAST_CHECK)) ++ return follow_overflow_type_and_dup(visited, stmt, rhs1, new_rhs1, NULL_TREE, NULL_TREE); ++ ++ if (gimple_assign_rhs_code(stmt) == BIT_NOT_EXPR) { ++ size_overflow_type = get_size_overflow_type(stmt, rhs1); ++ new_rhs1 = cast_to_new_size_overflow_type(stmt, new_rhs1, size_overflow_type, BEFORE_STMT); ++ check_size_overflow(stmt, size_overflow_type, new_rhs1, rhs1, BEFORE_STMT); ++ return create_assign(visited, stmt, lhs, AFTER_STMT); ++ } ++ ++ if (!gimple_assign_cast_p(stmt) || check_undefined_integer_operation(stmt)) ++ return follow_overflow_type_and_dup(visited, stmt, lhs, new_rhs1, NULL_TREE, NULL_TREE); ++ ++ size_overflow_type = get_size_overflow_type(stmt, rhs1); ++ new_rhs1 = cast_to_new_size_overflow_type(stmt, new_rhs1, size_overflow_type, BEFORE_STMT); ++ ++ change_rhs1(stmt, new_rhs1); ++ check_size_overflow(stmt, size_overflow_type, new_rhs1, rhs1, BEFORE_STMT); ++ ++ rhs1 = gimple_assign_rhs1(stmt); ++ rhs1_type = TREE_TYPE(rhs1); ++ if (TYPE_UNSIGNED(rhs1_type) != TYPE_UNSIGNED(lhs_type)) ++ return create_assign(visited, stmt, rhs1, AFTER_STMT); ++ ++ if (!check_mode_type(stmt)) ++ return create_assign(visited, stmt, lhs, AFTER_STMT); ++ ++ size_overflow_type = get_size_overflow_type(stmt, lhs); ++ new_rhs1 = cast_to_new_size_overflow_type(stmt, new_rhs1, size_overflow_type, BEFORE_STMT); ++ ++ check_size_overflow(stmt, size_overflow_type, new_rhs1, lhs, BEFORE_STMT); ++ ++ return create_assign(visited, stmt, lhs, AFTER_STMT); ++} ++ ++static tree handle_unary_ops(struct pointer_set_t *visited, tree lhs) ++{ ++ gimple def_stmt = get_def_stmt(lhs); ++ tree rhs1 = gimple_assign_rhs1(def_stmt); ++ ++ if (is_gimple_constant(rhs1)) ++ return create_assign(visited, def_stmt, lhs, AFTER_STMT); ++ ++ gcc_assert(TREE_CODE(rhs1) != COND_EXPR); ++ switch (TREE_CODE(rhs1)) { ++ case SSA_NAME: ++ return handle_unary_rhs(visited, def_stmt); ++ case ARRAY_REF: ++ case BIT_FIELD_REF: ++ case ADDR_EXPR: ++ case COMPONENT_REF: ++ case INDIRECT_REF: ++#if BUILDING_GCC_VERSION >= 4006 ++ case MEM_REF: ++#endif ++ case PARM_DECL: ++ case TARGET_MEM_REF: ++ case VAR_DECL: ++ return create_assign(visited, def_stmt, lhs, AFTER_STMT); ++ ++ default: ++ debug_gimple_stmt(def_stmt); ++ debug_tree(rhs1); ++ gcc_unreachable(); ++ } ++} ++ ++static void insert_cond(basic_block cond_bb, tree arg, enum tree_code cond_code, tree type_value) ++{ ++ gimple cond_stmt; ++ gimple_stmt_iterator gsi = gsi_last_bb(cond_bb); ++ ++ cond_stmt = gimple_build_cond(cond_code, arg, type_value, NULL_TREE, NULL_TREE); ++ gsi_insert_after(&gsi, cond_stmt, GSI_CONTINUE_LINKING); ++ update_stmt(cond_stmt); ++} ++ ++static tree create_string_param(tree string) ++{ ++ tree i_type, a_type; ++ const int length = TREE_STRING_LENGTH(string); ++ ++ gcc_assert(length > 0); ++ ++ i_type = build_index_type(build_int_cst(NULL_TREE, length - 1)); ++ a_type = build_array_type(char_type_node, i_type); ++ ++ TREE_TYPE(string) = a_type; ++ TREE_CONSTANT(string) = 1; ++ TREE_READONLY(string) = 1; ++ ++ return build1(ADDR_EXPR, ptr_type_node, string); ++} ++ ++static void insert_cond_result(basic_block bb_true, const_gimple stmt, const_tree arg, bool min) ++{ ++ gimple func_stmt; ++ const_gimple def_stmt; ++ const_tree loc_line; ++ tree loc_file, ssa_name, current_func; ++ expanded_location xloc; ++ char ssa_name_buf[256]; ++ gimple_stmt_iterator gsi = gsi_start_bb(bb_true); ++ ++ def_stmt = get_def_stmt(arg); ++ xloc = expand_location(gimple_location(def_stmt)); ++ ++ if (!gimple_has_location(def_stmt)) { ++ xloc = expand_location(gimple_location(stmt)); ++ if (!gimple_has_location(stmt)) ++ xloc = expand_location(DECL_SOURCE_LOCATION(current_function_decl)); ++ } ++ ++ loc_line = build_int_cstu(unsigned_type_node, xloc.line); ++ ++ loc_file = build_string(strlen(xloc.file) + 1, xloc.file); ++ loc_file = create_string_param(loc_file); ++ ++ current_func = build_string(NAME_LEN(current_function_decl) + 1, NAME(current_function_decl)); ++ current_func = create_string_param(current_func); ++ ++ snprintf(ssa_name_buf, 256, "%s_%u (%s)\n", NAME(SSA_NAME_VAR(arg)), SSA_NAME_VERSION(arg), min ? "min" : "max"); ++ ssa_name = build_string(256, ssa_name_buf); ++ ssa_name = create_string_param(ssa_name); ++ ++ // void report_size_overflow(const char *file, unsigned int line, const char *func, const char *ssa_name) ++ func_stmt = gimple_build_call(report_size_overflow_decl, 4, loc_file, loc_line, current_func, ssa_name); ++ ++ gsi_insert_after(&gsi, func_stmt, GSI_CONTINUE_LINKING); ++} ++ ++static void __unused print_the_code_insertions(const_gimple stmt) ++{ ++ location_t loc = gimple_location(stmt); ++ ++ inform(loc, "Integer size_overflow check applied here."); ++} ++ ++static void insert_check_size_overflow(gimple stmt, enum tree_code cond_code, tree arg, tree type_value, bool before, bool min) ++{ ++ basic_block cond_bb, join_bb, bb_true; ++ edge e; ++ gimple_stmt_iterator gsi = gsi_for_stmt(stmt); ++ ++ cond_bb = gimple_bb(stmt); ++ if (before) ++ gsi_prev(&gsi); ++ if (gsi_end_p(gsi)) ++ e = split_block_after_labels(cond_bb); ++ else ++ e = split_block(cond_bb, gsi_stmt(gsi)); ++ cond_bb = e->src; ++ join_bb = e->dest; ++ e->flags = EDGE_FALSE_VALUE; ++ e->probability = REG_BR_PROB_BASE; ++ ++ bb_true = create_empty_bb(cond_bb); ++ make_edge(cond_bb, bb_true, EDGE_TRUE_VALUE); ++ make_edge(cond_bb, join_bb, EDGE_FALSE_VALUE); ++ make_edge(bb_true, join_bb, EDGE_FALLTHRU); ++ ++ if (dom_info_available_p(CDI_DOMINATORS)) { ++ set_immediate_dominator(CDI_DOMINATORS, bb_true, cond_bb); ++ set_immediate_dominator(CDI_DOMINATORS, join_bb, cond_bb); ++ } ++ ++ if (current_loops != NULL) { ++ gcc_assert(cond_bb->loop_father == join_bb->loop_father); ++ add_bb_to_loop(bb_true, cond_bb->loop_father); ++ } ++ ++ insert_cond(cond_bb, arg, cond_code, type_value); ++ insert_cond_result(bb_true, stmt, arg, min); ++ ++// print_the_code_insertions(stmt); ++} ++ ++static void check_size_overflow(gimple stmt, tree size_overflow_type, tree cast_rhs, tree rhs, bool before) ++{ ++ const_tree rhs_type = TREE_TYPE(rhs); ++ tree cast_rhs_type, type_max_type, type_min_type, type_max, type_min; ++ ++ gcc_assert(rhs_type != NULL_TREE); ++ if (TREE_CODE(rhs_type) == POINTER_TYPE) ++ return; ++ ++ gcc_assert(TREE_CODE(rhs_type) == INTEGER_TYPE || TREE_CODE(rhs_type) == BOOLEAN_TYPE || TREE_CODE(rhs_type) == ENUMERAL_TYPE); ++ ++ type_max = cast_a_tree(size_overflow_type, TYPE_MAX_VALUE(rhs_type)); ++ type_min = cast_a_tree(size_overflow_type, TYPE_MIN_VALUE(rhs_type)); ++ ++ gcc_assert(!TREE_OVERFLOW(type_max)); ++ ++ cast_rhs_type = TREE_TYPE(cast_rhs); ++ type_max_type = TREE_TYPE(type_max); ++ type_min_type = TREE_TYPE(type_min); ++ gcc_assert(useless_type_conversion_p(cast_rhs_type, type_max_type)); ++ gcc_assert(useless_type_conversion_p(type_max_type, type_min_type)); ++ ++ insert_check_size_overflow(stmt, GT_EXPR, cast_rhs, type_max, before, false); ++ insert_check_size_overflow(stmt, LT_EXPR, cast_rhs, type_min, before, true); ++} ++ ++static tree get_size_overflow_type_for_intentional_overflow(gimple def_stmt, tree change_rhs) ++{ ++ gimple change_rhs_def_stmt; ++ tree lhs = gimple_get_lhs(def_stmt); ++ tree lhs_type = TREE_TYPE(lhs); ++ tree rhs1_type = TREE_TYPE(gimple_assign_rhs1(def_stmt)); ++ tree rhs2_type = TREE_TYPE(gimple_assign_rhs2(def_stmt)); ++ ++ if (change_rhs == NULL_TREE) ++ return get_size_overflow_type(def_stmt, lhs); ++ ++ change_rhs_def_stmt = get_def_stmt(change_rhs); ++ ++ if (TREE_CODE_CLASS(gimple_assign_rhs_code(def_stmt)) == tcc_comparison) ++ return get_size_overflow_type(change_rhs_def_stmt, change_rhs); ++ ++ if (gimple_assign_rhs_code(def_stmt) == LSHIFT_EXPR) ++ return get_size_overflow_type(change_rhs_def_stmt, change_rhs); ++ ++ if (gimple_assign_rhs_code(def_stmt) == RSHIFT_EXPR) ++ return get_size_overflow_type(change_rhs_def_stmt, change_rhs); ++ ++ if (!useless_type_conversion_p(lhs_type, rhs1_type) || !useless_type_conversion_p(rhs1_type, rhs2_type)) { ++ debug_gimple_stmt(def_stmt); ++ gcc_unreachable(); ++ } ++ ++ return get_size_overflow_type(def_stmt, lhs); ++} ++ ++static bool is_a_constant_overflow(const_gimple stmt, const_tree rhs) ++{ ++ if (gimple_assign_rhs_code(stmt) == MIN_EXPR) ++ return false; ++ if (!is_gimple_constant(rhs)) ++ return false; ++ return true; ++} ++ ++static tree get_cast_def_stmt_rhs(const_tree new_rhs) ++{ ++ gimple def_stmt; ++ ++ def_stmt = get_def_stmt(new_rhs); ++ // get_size_overflow_type ++ if (LONG_TYPE_SIZE != GET_MODE_BITSIZE(SImode)) ++ gcc_assert(gimple_assign_cast_p(def_stmt)); ++ return gimple_assign_rhs1(def_stmt); ++} ++ ++static tree cast_to_int_TI_type_and_check(gimple stmt, tree new_rhs) ++{ ++ gimple_stmt_iterator gsi; ++ const_gimple cast_stmt; ++ gimple def_stmt; ++ enum machine_mode mode = TYPE_MODE(TREE_TYPE(new_rhs)); ++ ++ if (mode != TImode && mode != DImode) { ++ def_stmt = get_def_stmt(new_rhs); ++ gcc_assert(gimple_assign_cast_p(def_stmt)); ++ new_rhs = gimple_assign_rhs1(def_stmt); ++ mode = TYPE_MODE(TREE_TYPE(new_rhs)); ++ } ++ ++ gcc_assert(mode == TImode || mode == DImode); ++ ++ if (mode == TYPE_MODE(intTI_type_node) && useless_type_conversion_p(TREE_TYPE(new_rhs), intTI_type_node)) ++ return new_rhs; ++ ++ gsi = gsi_for_stmt(stmt); ++ cast_stmt = build_cast_stmt(intTI_type_node, new_rhs, CREATE_NEW_VAR, &gsi, BEFORE_STMT); ++ new_rhs = gimple_get_lhs(cast_stmt); ++ ++ if (mode == DImode) ++ return new_rhs; ++ ++ check_size_overflow(stmt, intTI_type_node, new_rhs, new_rhs, BEFORE_STMT); ++ ++ return new_rhs; ++} ++ ++static bool is_an_integer_trunction(const_gimple stmt) ++{ ++ gimple rhs1_def_stmt, rhs2_def_stmt; ++ const_tree rhs1_def_stmt_rhs1, rhs2_def_stmt_rhs1; ++ enum machine_mode rhs1_def_stmt_rhs1_mode, rhs2_def_stmt_rhs1_mode; ++ const_tree rhs1 = gimple_assign_rhs1(stmt); ++ const_tree rhs2 = gimple_assign_rhs2(stmt); ++ enum machine_mode rhs1_mode = TYPE_MODE(TREE_TYPE(rhs1)); ++ enum machine_mode rhs2_mode = TYPE_MODE(TREE_TYPE(rhs2)); ++ ++ if (is_gimple_constant(rhs1) || is_gimple_constant(rhs2)) ++ return false; ++ ++ gcc_assert(TREE_CODE(rhs1) == SSA_NAME && TREE_CODE(rhs2) == SSA_NAME); ++ ++ if (gimple_assign_rhs_code(stmt) != MINUS_EXPR || rhs1_mode != SImode || rhs2_mode != SImode) ++ return false; ++ ++ rhs1_def_stmt = get_def_stmt(rhs1); ++ rhs2_def_stmt = get_def_stmt(rhs2); ++ if (!gimple_assign_cast_p(rhs1_def_stmt) || !gimple_assign_cast_p(rhs2_def_stmt)) ++ return false; ++ ++ rhs1_def_stmt_rhs1 = gimple_assign_rhs1(rhs1_def_stmt); ++ rhs2_def_stmt_rhs1 = gimple_assign_rhs1(rhs2_def_stmt); ++ rhs1_def_stmt_rhs1_mode = TYPE_MODE(TREE_TYPE(rhs1_def_stmt_rhs1)); ++ rhs2_def_stmt_rhs1_mode = TYPE_MODE(TREE_TYPE(rhs2_def_stmt_rhs1)); ++ if (rhs1_def_stmt_rhs1_mode != DImode || rhs2_def_stmt_rhs1_mode != DImode) ++ return false; ++ ++ gimple_set_plf(rhs1_def_stmt, NO_CAST_CHECK, true); ++ gimple_set_plf(rhs2_def_stmt, NO_CAST_CHECK, true); ++ return true; ++} ++ ++static tree handle_integer_truncation(struct pointer_set_t *visited, const_tree lhs) ++{ ++ tree new_rhs1, new_rhs2; ++ tree new_rhs1_def_stmt_rhs1, new_rhs2_def_stmt_rhs1, new_lhs; ++ tree new_rhs1_def_stmt_rhs1_type, new_rhs2_def_stmt_rhs1_type; ++ gimple assign, stmt = get_def_stmt(lhs); ++ tree rhs1 = gimple_assign_rhs1(stmt); ++ tree rhs2 = gimple_assign_rhs2(stmt); ++ ++ if (!is_an_integer_trunction(stmt)) ++ return NULL_TREE; ++ ++ new_rhs1 = expand(visited, rhs1); ++ new_rhs2 = expand(visited, rhs2); ++ ++ new_rhs1_def_stmt_rhs1 = get_cast_def_stmt_rhs(new_rhs1); ++ new_rhs2_def_stmt_rhs1 = get_cast_def_stmt_rhs(new_rhs2); ++ ++ new_rhs1_def_stmt_rhs1_type = TREE_TYPE(new_rhs1_def_stmt_rhs1); ++ new_rhs2_def_stmt_rhs1_type = TREE_TYPE(new_rhs2_def_stmt_rhs1); ++ ++ if (!useless_type_conversion_p(new_rhs1_def_stmt_rhs1_type, new_rhs2_def_stmt_rhs1_type)) { ++ new_rhs1_def_stmt_rhs1 = cast_to_int_TI_type_and_check(stmt, new_rhs1_def_stmt_rhs1); ++ new_rhs2_def_stmt_rhs1 = cast_to_int_TI_type_and_check(stmt, new_rhs2_def_stmt_rhs1); ++ } ++ ++ assign = create_binary_assign(MINUS_EXPR, stmt, new_rhs1_def_stmt_rhs1, new_rhs2_def_stmt_rhs1); ++ new_lhs = gimple_get_lhs(assign); ++ check_size_overflow(assign, TREE_TYPE(new_lhs), new_lhs, rhs1, AFTER_STMT); ++ ++ return follow_overflow_type_and_dup(visited, stmt, lhs, new_rhs1, new_rhs2, NULL_TREE); ++} ++ ++static bool is_a_neg_overflow(const_gimple stmt, const_tree rhs) ++{ ++ const_gimple def_stmt; ++ ++ if (TREE_CODE(rhs) != SSA_NAME) ++ return false; ++ ++ if (gimple_assign_rhs_code(stmt) != PLUS_EXPR) ++ return false; ++ ++ def_stmt = get_def_stmt(rhs); ++ if (gimple_code(def_stmt) != GIMPLE_ASSIGN || gimple_assign_rhs_code(def_stmt) != BIT_NOT_EXPR) ++ return false; ++ ++ return true; ++} ++ ++static tree handle_intentional_overflow(struct pointer_set_t *visited, bool check_overflow, gimple stmt, tree change_rhs, tree new_rhs1, tree new_rhs2) ++{ ++ tree new_rhs, size_overflow_type, orig_rhs; ++ void (*gimple_assign_set_rhs)(gimple, tree); ++ tree rhs1 = gimple_assign_rhs1(stmt); ++ tree rhs2 = gimple_assign_rhs2(stmt); ++ tree lhs = gimple_get_lhs(stmt); ++ ++ if (change_rhs == NULL_TREE) ++ return create_assign(visited, stmt, lhs, AFTER_STMT); ++ ++ if (new_rhs2 == NULL_TREE) { ++ size_overflow_type = get_size_overflow_type_for_intentional_overflow(stmt, new_rhs1); ++ new_rhs2 = cast_a_tree(size_overflow_type, rhs2); ++ orig_rhs = rhs1; ++ gimple_assign_set_rhs = &gimple_assign_set_rhs1; ++ } else { ++ size_overflow_type = get_size_overflow_type_for_intentional_overflow(stmt, new_rhs2); ++ new_rhs1 = cast_a_tree(size_overflow_type, rhs1); ++ orig_rhs = rhs2; ++ gimple_assign_set_rhs = &gimple_assign_set_rhs2; ++ } ++ ++ change_rhs = cast_to_new_size_overflow_type(stmt, change_rhs, size_overflow_type, BEFORE_STMT); ++ ++ if (check_overflow) ++ check_size_overflow(stmt, size_overflow_type, change_rhs, orig_rhs, BEFORE_STMT); ++ ++ new_rhs = change_assign_rhs(stmt, orig_rhs, change_rhs); ++ gimple_assign_set_rhs(stmt, new_rhs); ++ update_stmt(stmt); ++ ++ return create_assign(visited, stmt, lhs, AFTER_STMT); ++} ++ ++static tree handle_binary_ops(struct pointer_set_t *visited, tree lhs) ++{ ++ tree rhs1, rhs2, new_lhs; ++ gimple def_stmt = get_def_stmt(lhs); ++ tree new_rhs1 = NULL_TREE; ++ tree new_rhs2 = NULL_TREE; ++ ++ rhs1 = gimple_assign_rhs1(def_stmt); ++ rhs2 = gimple_assign_rhs2(def_stmt); ++ ++ /* no DImode/TImode division in the 32/64 bit kernel */ ++ switch (gimple_assign_rhs_code(def_stmt)) { ++ case RDIV_EXPR: ++ case TRUNC_DIV_EXPR: ++ case CEIL_DIV_EXPR: ++ case FLOOR_DIV_EXPR: ++ case ROUND_DIV_EXPR: ++ case TRUNC_MOD_EXPR: ++ case CEIL_MOD_EXPR: ++ case FLOOR_MOD_EXPR: ++ case ROUND_MOD_EXPR: ++ case EXACT_DIV_EXPR: ++ case POINTER_PLUS_EXPR: ++ case BIT_AND_EXPR: ++ return create_assign(visited, def_stmt, lhs, AFTER_STMT); ++ default: ++ break; ++ } ++ ++ new_lhs = handle_integer_truncation(visited, lhs); ++ if (new_lhs != NULL_TREE) ++ return new_lhs; ++ ++ if (TREE_CODE(rhs1) == SSA_NAME) ++ new_rhs1 = expand(visited, rhs1); ++ if (TREE_CODE(rhs2) == SSA_NAME) ++ new_rhs2 = expand(visited, rhs2); ++ ++ if (is_a_neg_overflow(def_stmt, rhs2)) ++ return handle_intentional_overflow(visited, true, def_stmt, new_rhs1, new_rhs1, NULL_TREE); ++ if (is_a_neg_overflow(def_stmt, rhs1)) ++ return handle_intentional_overflow(visited, true, def_stmt, new_rhs2, NULL_TREE, new_rhs2); ++ ++ if (is_a_constant_overflow(def_stmt, rhs2)) ++ return handle_intentional_overflow(visited, !is_a_cast_and_const_overflow(rhs1), def_stmt, new_rhs1, new_rhs1, NULL_TREE); ++ if (is_a_constant_overflow(def_stmt, rhs1)) ++ return handle_intentional_overflow(visited, !is_a_cast_and_const_overflow(rhs2), def_stmt, new_rhs2, NULL_TREE, new_rhs2); ++ ++ return follow_overflow_type_and_dup(visited, def_stmt, lhs, new_rhs1, new_rhs2, NULL_TREE); ++} ++ ++#if BUILDING_GCC_VERSION >= 4007 ++static tree get_new_rhs(struct pointer_set_t *visited, tree size_overflow_type, tree rhs) ++{ ++ if (is_gimple_constant(rhs)) ++ return cast_a_tree(size_overflow_type, rhs); ++ if (TREE_CODE(rhs) != SSA_NAME) ++ return NULL_TREE; ++ return expand(visited, rhs); ++} ++ ++static tree handle_ternary_ops(struct pointer_set_t *visited, tree lhs) ++{ ++ tree rhs1, rhs2, rhs3, new_rhs1, new_rhs2, new_rhs3, size_overflow_type; ++ gimple def_stmt = get_def_stmt(lhs); ++ ++ size_overflow_type = get_size_overflow_type(def_stmt, lhs); ++ ++ rhs1 = gimple_assign_rhs1(def_stmt); ++ rhs2 = gimple_assign_rhs2(def_stmt); ++ rhs3 = gimple_assign_rhs3(def_stmt); ++ new_rhs1 = get_new_rhs(visited, size_overflow_type, rhs1); ++ new_rhs2 = get_new_rhs(visited, size_overflow_type, rhs2); ++ new_rhs3 = get_new_rhs(visited, size_overflow_type, rhs3); ++ ++ return follow_overflow_type_and_dup(visited, def_stmt, lhs, new_rhs1, new_rhs2, new_rhs3); ++} ++#endif ++ ++static tree get_size_overflow_type(gimple stmt, const_tree node) ++{ ++ const_tree type; ++ ++ gcc_assert(node != NULL_TREE); ++ ++ type = TREE_TYPE(node); ++ ++ if (gimple_plf(stmt, MY_STMT)) ++ return TREE_TYPE(node); ++ ++ switch (TYPE_MODE(type)) { ++ case QImode: ++ return (TYPE_UNSIGNED(type)) ? unsigned_intHI_type_node : intHI_type_node; ++ case HImode: ++ return (TYPE_UNSIGNED(type)) ? unsigned_intSI_type_node : intSI_type_node; ++ case SImode: ++ return (TYPE_UNSIGNED(type)) ? unsigned_intDI_type_node : intDI_type_node; ++ case DImode: ++ if (LONG_TYPE_SIZE == GET_MODE_BITSIZE(SImode)) ++ return (TYPE_UNSIGNED(type)) ? unsigned_intDI_type_node : intDI_type_node; ++ return (TYPE_UNSIGNED(type)) ? unsigned_intTI_type_node : intTI_type_node; ++ default: ++ debug_tree((tree)node); ++ error("%s: unsupported gcc configuration.", __func__); ++ gcc_unreachable(); ++ } ++} ++ ++static tree expand_visited(gimple def_stmt) ++{ ++ const_gimple next_stmt; ++ gimple_stmt_iterator gsi = gsi_for_stmt(def_stmt); ++ ++ gsi_next(&gsi); ++ next_stmt = gsi_stmt(gsi); ++ ++ gcc_assert(gimple_plf((gimple)next_stmt, MY_STMT)); ++ ++ switch (gimple_code(next_stmt)) { ++ case GIMPLE_ASSIGN: ++ return gimple_get_lhs(next_stmt); ++ case GIMPLE_PHI: ++ return gimple_phi_result(next_stmt); ++ case GIMPLE_CALL: ++ return gimple_call_lhs(next_stmt); ++ default: ++ return NULL_TREE; ++ } ++} ++ ++static tree expand(struct pointer_set_t *visited, tree lhs) ++{ ++ gimple def_stmt; ++ enum tree_code code = TREE_CODE(TREE_TYPE(lhs)); ++ ++ if (is_gimple_constant(lhs)) ++ return NULL_TREE; ++ ++ if (TREE_CODE(lhs) == ADDR_EXPR) ++ return NULL_TREE; ++ ++ if (code == REAL_TYPE) ++ return NULL_TREE; ++ ++ gcc_assert(code == INTEGER_TYPE || code == POINTER_TYPE || code == BOOLEAN_TYPE || code == ENUMERAL_TYPE); ++ ++ ++ def_stmt = get_def_stmt(lhs); ++ ++ if (!def_stmt) ++ return NULL_TREE; ++ ++ if (gimple_plf(def_stmt, MY_STMT)) ++ return lhs; ++ ++ if (pointer_set_contains(visited, def_stmt)) ++ return expand_visited(def_stmt); ++ ++ switch (gimple_code(def_stmt)) { ++ case GIMPLE_NOP: ++ return NULL_TREE; ++ case GIMPLE_PHI: ++ return build_new_phi(visited, lhs); ++ case GIMPLE_CALL: ++ case GIMPLE_ASM: ++ return create_assign(visited, def_stmt, lhs, AFTER_STMT); ++ case GIMPLE_ASSIGN: ++ switch (gimple_num_ops(def_stmt)) { ++ case 2: ++ return handle_unary_ops(visited, lhs); ++ case 3: ++ return handle_binary_ops(visited, lhs); ++#if BUILDING_GCC_VERSION >= 4007 ++ case 4: ++ return handle_ternary_ops(visited, lhs); ++#endif ++ } ++ default: ++ debug_gimple_stmt(def_stmt); ++ error("%s: unknown gimple code", __func__); ++ gcc_unreachable(); ++ } ++} ++ ++static void change_function_arg(gimple stmt, const_tree origarg, unsigned int argnum, tree newarg) ++{ ++ const_gimple assign; ++ gimple_stmt_iterator gsi = gsi_for_stmt(stmt); ++ tree origtype = TREE_TYPE(origarg); ++ ++ gcc_assert(gimple_code(stmt) == GIMPLE_CALL); ++ ++ assign = build_cast_stmt(origtype, newarg, CREATE_NEW_VAR, &gsi, BEFORE_STMT); ++ ++ gimple_call_set_arg(stmt, argnum, gimple_get_lhs(assign)); ++ update_stmt(stmt); ++} ++ ++static bool get_function_arg(unsigned int* argnum, const_tree fndecl) ++{ ++ const char *origid; ++ tree arg; ++ const_tree origarg; ++ ++ if (!DECL_ABSTRACT_ORIGIN(fndecl)) ++ return true; ++ ++ origarg = DECL_ARGUMENTS(DECL_ABSTRACT_ORIGIN(fndecl)); ++ while (origarg && *argnum) { ++ (*argnum)--; ++ origarg = TREE_CHAIN(origarg); ++ } ++ ++ gcc_assert(*argnum == 0); ++ ++ gcc_assert(origarg != NULL_TREE); ++ origid = NAME(origarg); ++ *argnum = 0; ++ for (arg = DECL_ARGUMENTS(fndecl); arg; arg = TREE_CHAIN(arg)) { ++ if (!strcmp(origid, NAME(arg))) ++ return true; ++ (*argnum)++; ++ } ++ return false; ++} ++ ++static bool skip_types(const_tree var) ++{ ++ switch (TREE_CODE(var)) { ++ case ADDR_EXPR: ++#if BUILDING_GCC_VERSION >= 4006 ++ case MEM_REF: ++#endif ++ case ARRAY_REF: ++ case BIT_FIELD_REF: ++ case INDIRECT_REF: ++ case TARGET_MEM_REF: ++ case VAR_DECL: ++ return true; ++ default: ++ break; ++ } ++ return false; ++} ++ ++static bool walk_phi(struct pointer_set_t *visited, const_tree result) ++{ ++ gimple phi = get_def_stmt(result); ++ unsigned int i, n = gimple_phi_num_args(phi); ++ ++ if (!phi) ++ return false; ++ ++ pointer_set_insert(visited, phi); ++ for (i = 0; i < n; i++) { ++ const_tree arg = gimple_phi_arg_def(phi, i); ++ if (pre_expand(visited, arg)) ++ return true; ++ } ++ return false; ++} ++ ++static bool walk_unary_ops(struct pointer_set_t *visited, const_tree lhs) ++{ ++ gimple def_stmt = get_def_stmt(lhs); ++ const_tree rhs; ++ ++ if (!def_stmt) ++ return false; ++ ++ rhs = gimple_assign_rhs1(def_stmt); ++ if (pre_expand(visited, rhs)) ++ return true; ++ return false; ++} ++ ++static bool walk_binary_ops(struct pointer_set_t *visited, const_tree lhs) ++{ ++ bool rhs1_found, rhs2_found; ++ gimple def_stmt = get_def_stmt(lhs); ++ const_tree rhs1, rhs2; ++ ++ if (!def_stmt) ++ return false; ++ ++ rhs1 = gimple_assign_rhs1(def_stmt); ++ rhs2 = gimple_assign_rhs2(def_stmt); ++ rhs1_found = pre_expand(visited, rhs1); ++ rhs2_found = pre_expand(visited, rhs2); ++ ++ return rhs1_found || rhs2_found; ++} ++ ++static const_tree search_field_decl(const_tree comp_ref) ++{ ++ const_tree field = NULL_TREE; ++ unsigned int i, len = TREE_OPERAND_LENGTH(comp_ref); ++ ++ for (i = 0; i < len; i++) { ++ field = TREE_OPERAND(comp_ref, i); ++ if (TREE_CODE(field) == FIELD_DECL) ++ break; ++ } ++ gcc_assert(TREE_CODE(field) == FIELD_DECL); ++ return field; ++} ++ ++static enum marked mark_status(const_tree fndecl, unsigned int argnum) ++{ ++ const_tree attr, p; ++ ++ attr = lookup_attribute("intentional_overflow", DECL_ATTRIBUTES(fndecl)); ++ if (!attr || !TREE_VALUE(attr)) ++ return MARKED_NO; ++ ++ p = TREE_VALUE(attr); ++ if (!TREE_INT_CST_LOW(TREE_VALUE(p))) ++ return MARKED_NOT_INTENTIONAL; ++ ++ do { ++ if (argnum == TREE_INT_CST_LOW(TREE_VALUE(p))) ++ return MARKED_YES; ++ p = TREE_CHAIN(p); ++ } while (p); ++ ++ return MARKED_NO; ++} ++ ++static void print_missing_msg(tree func, unsigned int argnum) ++{ ++ unsigned int new_hash; ++ size_t len; ++ unsigned char tree_codes[CODES_LIMIT]; ++ location_t loc = DECL_SOURCE_LOCATION(func); ++ const char *curfunc = get_asm_name(func); ++ ++ len = get_function_decl(func, tree_codes); ++ new_hash = get_hash_num(curfunc, (const char *) tree_codes, len, 0); ++ inform(loc, "Function %s is missing from the size_overflow hash table +%s+%u+%u+", curfunc, curfunc, argnum, new_hash); ++} ++ ++static unsigned int search_missing_attribute(const_tree arg) ++{ ++ const_tree type = TREE_TYPE(arg); ++ tree func = get_original_function_decl(current_function_decl); ++ unsigned int argnum; ++ const struct size_overflow_hash *hash; ++ ++ gcc_assert(TREE_CODE(arg) != COMPONENT_REF); ++ ++ if (TREE_CODE(type) == POINTER_TYPE) ++ return 0; ++ ++ argnum = find_arg_number(arg, func); ++ if (argnum == 0) ++ return 0; ++ ++ if (lookup_attribute("size_overflow", DECL_ATTRIBUTES(func))) ++ return argnum; ++ ++ hash = get_function_hash(func); ++ if (!hash || !(hash->param & (1U << argnum))) { ++ print_missing_msg(func, argnum); ++ return 0; ++ } ++ return argnum; ++} ++ ++static bool is_already_marked(const_tree lhs) ++{ ++ unsigned int argnum; ++ const_tree fndecl; ++ ++ argnum = search_missing_attribute(lhs); ++ fndecl = get_original_function_decl(current_function_decl); ++ if (argnum && mark_status(fndecl, argnum) == MARKED_YES) ++ return true; ++ return false; ++} ++ ++static bool pre_expand(struct pointer_set_t *visited, const_tree lhs) ++{ ++ const_gimple def_stmt; ++ ++ if (is_gimple_constant(lhs)) ++ return false; ++ ++ if (skip_types(lhs)) ++ return false; ++ ++ if (TREE_CODE(lhs) == PARM_DECL) ++ return is_already_marked(lhs); ++ ++ if (TREE_CODE(lhs) == COMPONENT_REF) { ++ const_tree field, attr; ++ ++ field = search_field_decl(lhs); ++ attr = lookup_attribute("intentional_overflow", DECL_ATTRIBUTES(field)); ++ if (!attr || !TREE_VALUE(attr)) ++ return false; ++ return true; ++ } ++ ++ def_stmt = get_def_stmt(lhs); ++ ++ if (!def_stmt) ++ return false; ++ ++ if (pointer_set_contains(visited, def_stmt)) ++ return false; ++ ++ switch (gimple_code(def_stmt)) { ++ case GIMPLE_NOP: ++ if (TREE_CODE(SSA_NAME_VAR(lhs)) == PARM_DECL) ++ return is_already_marked(lhs); ++ return false; ++ case GIMPLE_PHI: ++ return walk_phi(visited, lhs); ++ case GIMPLE_CALL: ++ case GIMPLE_ASM: ++ return false; ++ case GIMPLE_ASSIGN: ++ switch (gimple_num_ops(def_stmt)) { ++ case 2: ++ return walk_unary_ops(visited, lhs); ++ case 3: ++ return walk_binary_ops(visited, lhs); ++ } ++ default: ++ debug_gimple_stmt((gimple)def_stmt); ++ error("%s: unknown gimple code", __func__); ++ gcc_unreachable(); ++ } ++} ++ ++static bool search_attributes(tree fndecl, const_tree arg, unsigned int argnum) ++{ ++ struct pointer_set_t *visited; ++ bool is_found; ++ enum marked is_marked; ++ location_t loc; ++ ++ visited = pointer_set_create(); ++ is_found = pre_expand(visited, arg); ++ pointer_set_destroy(visited); ++ ++ is_marked = mark_status(fndecl, argnum + 1); ++ if ((is_found && is_marked == MARKED_YES) || is_marked == MARKED_NOT_INTENTIONAL) ++ return true; ++ ++ if (is_found) { ++ loc = DECL_SOURCE_LOCATION(fndecl); ++ inform(loc, "The intentional_overflow attribute is missing from +%s+%u+", get_asm_name(fndecl), argnum + 1); ++ return true; ++ } ++ return false; ++} ++ ++static void handle_function_arg(gimple stmt, tree fndecl, unsigned int argnum) ++{ ++ struct pointer_set_t *visited; ++ tree arg, newarg; ++ bool match; ++ ++ match = get_function_arg(&argnum, fndecl); ++ if (!match) ++ return; ++ gcc_assert(gimple_call_num_args(stmt) > argnum); ++ arg = gimple_call_arg(stmt, argnum); ++ if (arg == NULL_TREE) ++ return; ++ ++ if (is_gimple_constant(arg)) ++ return; ++ ++ if (search_attributes(fndecl, arg, argnum)) ++ return; ++ ++ if (TREE_CODE(arg) != SSA_NAME) ++ return; ++ ++ check_arg_type(arg); ++ ++ visited = pointer_set_create(); ++ newarg = expand(visited, arg); ++ pointer_set_destroy(visited); ++ ++ if (newarg == NULL_TREE) ++ return; ++ ++ change_function_arg(stmt, arg, argnum, newarg); ++ ++ check_size_overflow(stmt, TREE_TYPE(newarg), newarg, arg, BEFORE_STMT); ++} ++ ++static void handle_function_by_attribute(gimple stmt, const_tree attr, tree fndecl) ++{ ++ tree p = TREE_VALUE(attr); ++ do { ++ handle_function_arg(stmt, fndecl, TREE_INT_CST_LOW(TREE_VALUE(p))-1); ++ p = TREE_CHAIN(p); ++ } while (p); ++} ++ ++static void handle_function_by_hash(gimple stmt, tree fndecl) ++{ ++ tree orig_fndecl; ++ unsigned int num; ++ const struct size_overflow_hash *hash; ++ ++ orig_fndecl = get_original_function_decl(fndecl); ++ if (C_DECL_IMPLICIT(orig_fndecl)) ++ return; ++ hash = get_function_hash(orig_fndecl); ++ if (!hash) ++ return; ++ ++ for (num = 1; num <= MAX_PARAM; num++) ++ if (hash->param & (1U << num)) ++ handle_function_arg(stmt, fndecl, num - 1); ++} ++ ++static void set_plf_false(void) ++{ ++ basic_block bb; ++ ++ FOR_ALL_BB(bb) { ++ gimple_stmt_iterator si; ++ ++ for (si = gsi_start_bb(bb); !gsi_end_p(si); gsi_next(&si)) ++ gimple_set_plf(gsi_stmt(si), MY_STMT, false); ++ for (si = gsi_start_phis(bb); !gsi_end_p(si); gsi_next(&si)) ++ gimple_set_plf(gsi_stmt(si), MY_STMT, false); ++ } ++} ++ ++static unsigned int handle_function(void) ++{ ++ basic_block next, bb = ENTRY_BLOCK_PTR->next_bb; ++ ++ set_plf_false(); ++ ++ do { ++ gimple_stmt_iterator gsi; ++ next = bb->next_bb; ++ ++ for (gsi = gsi_start_bb(bb); !gsi_end_p(gsi); gsi_next(&gsi)) { ++ tree fndecl, attr; ++ gimple stmt = gsi_stmt(gsi); ++ ++ if (!(is_gimple_call(stmt))) ++ continue; ++ fndecl = gimple_call_fndecl(stmt); ++ if (fndecl == NULL_TREE) ++ continue; ++ if (gimple_call_num_args(stmt) == 0) ++ continue; ++ attr = lookup_attribute("size_overflow", DECL_ATTRIBUTES(fndecl)); ++ if (!attr || !TREE_VALUE(attr)) ++ handle_function_by_hash(stmt, fndecl); ++ else ++ handle_function_by_attribute(stmt, attr, fndecl); ++ gsi = gsi_for_stmt(stmt); ++ next = gimple_bb(stmt)->next_bb; ++ } ++ bb = next; ++ } while (bb); ++ return 0; ++} ++ ++static struct gimple_opt_pass size_overflow_pass = { ++ .pass = { ++ .type = GIMPLE_PASS, ++ .name = "size_overflow", ++ .gate = NULL, ++ .execute = handle_function, ++ .sub = NULL, ++ .next = NULL, ++ .static_pass_number = 0, ++ .tv_id = TV_NONE, ++ .properties_required = PROP_cfg | PROP_referenced_vars, ++ .properties_provided = 0, ++ .properties_destroyed = 0, ++ .todo_flags_start = 0, ++ .todo_flags_finish = TODO_verify_ssa | TODO_verify_stmts | TODO_dump_func | TODO_remove_unused_locals | TODO_update_ssa_no_phi | TODO_cleanup_cfg | TODO_ggc_collect | TODO_verify_flow ++ } ++}; ++ ++static void start_unit_callback(void __unused *gcc_data, void __unused *user_data) ++{ ++ tree fntype; ++ ++ const_char_ptr_type_node = build_pointer_type(build_type_variant(char_type_node, 1, 0)); ++ ++ // void report_size_overflow(const char *loc_file, unsigned int loc_line, const char *current_func, const char *ssa_var) ++ fntype = build_function_type_list(void_type_node, ++ const_char_ptr_type_node, ++ unsigned_type_node, ++ const_char_ptr_type_node, ++ const_char_ptr_type_node, ++ NULL_TREE); ++ report_size_overflow_decl = build_fn_decl("report_size_overflow", fntype); ++ ++ DECL_ASSEMBLER_NAME(report_size_overflow_decl); ++ TREE_PUBLIC(report_size_overflow_decl) = 1; ++ DECL_EXTERNAL(report_size_overflow_decl) = 1; ++ DECL_ARTIFICIAL(report_size_overflow_decl) = 1; ++ TREE_THIS_VOLATILE(report_size_overflow_decl) = 1; ++} ++ ++int plugin_init(struct plugin_name_args *plugin_info, struct plugin_gcc_version *version) ++{ ++ int i; ++ const char * const plugin_name = plugin_info->base_name; ++ const int argc = plugin_info->argc; ++ const struct plugin_argument * const argv = plugin_info->argv; ++ bool enable = true; ++ ++ struct register_pass_info size_overflow_pass_info = { ++ .pass = &size_overflow_pass.pass, ++ .reference_pass_name = "ssa", ++ .ref_pass_instance_number = 1, ++ .pos_op = PASS_POS_INSERT_AFTER ++ }; ++ ++ if (!plugin_default_version_check(version, &gcc_version)) { ++ error(G_("incompatible gcc/plugin versions")); ++ return 1; ++ } ++ ++ for (i = 0; i < argc; ++i) { ++ if (!strcmp(argv[i].key, "no-size-overflow")) { ++ enable = false; ++ continue; ++ } ++ error(G_("unkown option '-fplugin-arg-%s-%s'"), plugin_name, argv[i].key); ++ } ++ ++ register_callback(plugin_name, PLUGIN_INFO, NULL, &size_overflow_plugin_info); ++ if (enable) { ++ register_callback("start_unit", PLUGIN_START_UNIT, &start_unit_callback, NULL); ++ register_callback(plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL, &size_overflow_pass_info); ++ } ++ register_callback(plugin_name, PLUGIN_ATTRIBUTES, register_attributes, NULL); ++ ++ return 0; ++} +--- tools/gcc/stackleak_plugin.c 1970-01-01 00:00:00.000000000 +0000 ++++ tools/gcc/stackleak_plugin.c 2012-10-15 17:30:59.835924531 +0000 +@@ -0,0 +1,313 @@ ++/* ++ * Copyright 2011 by the PaX Team <pageexec@freemail.hu> ++ * Licensed under the GPL v2 ++ * ++ * Note: the choice of the license means that the compilation process is ++ * NOT 'eligible' as defined by gcc's library exception to the GPL v3, ++ * but for the kernel it doesn't matter since it doesn't link against ++ * any of the gcc libraries ++ * ++ * gcc plugin to help implement various PaX features ++ * ++ * - track lowest stack pointer ++ * ++ * TODO: ++ * - initialize all local variables ++ * ++ * BUGS: ++ * - none known ++ */ ++#include "gcc-plugin.h" ++#include "config.h" ++#include "system.h" ++#include "coretypes.h" ++#include "tree.h" ++#include "tree-pass.h" ++#include "flags.h" ++#include "intl.h" ++#include "toplev.h" ++#include "plugin.h" ++//#include "expr.h" where are you... ++#include "diagnostic.h" ++#include "plugin-version.h" ++#include "tm.h" ++#include "function.h" ++#include "basic-block.h" ++#include "gimple.h" ++#include "rtl.h" ++#include "emit-rtl.h" ++ ++extern void print_gimple_stmt(FILE *, gimple, int, int); ++ ++int plugin_is_GPL_compatible; ++ ++static int track_frame_size = -1; ++static const char track_function[] = "pax_track_stack"; ++static const char check_function[] = "pax_check_alloca"; ++static bool init_locals; ++ ++static struct plugin_info stackleak_plugin_info = { ++ .version = "201203140940", ++ .help = "track-lowest-sp=nn\ttrack sp in functions whose frame size is at least nn bytes\n" ++// "initialize-locals\t\tforcibly initialize all stack frames\n" ++}; ++ ++static bool gate_stackleak_track_stack(void); ++static unsigned int execute_stackleak_tree_instrument(void); ++static unsigned int execute_stackleak_final(void); ++ ++static struct gimple_opt_pass stackleak_tree_instrument_pass = { ++ .pass = { ++ .type = GIMPLE_PASS, ++ .name = "stackleak_tree_instrument", ++ .gate = gate_stackleak_track_stack, ++ .execute = execute_stackleak_tree_instrument, ++ .sub = NULL, ++ .next = NULL, ++ .static_pass_number = 0, ++ .tv_id = TV_NONE, ++ .properties_required = PROP_gimple_leh | PROP_cfg, ++ .properties_provided = 0, ++ .properties_destroyed = 0, ++ .todo_flags_start = 0, //TODO_verify_ssa | TODO_verify_flow | TODO_verify_stmts, ++ .todo_flags_finish = TODO_verify_ssa | TODO_verify_stmts | TODO_dump_func | TODO_update_ssa ++ } ++}; ++ ++static struct rtl_opt_pass stackleak_final_rtl_opt_pass = { ++ .pass = { ++ .type = RTL_PASS, ++ .name = "stackleak_final", ++ .gate = gate_stackleak_track_stack, ++ .execute = execute_stackleak_final, ++ .sub = NULL, ++ .next = NULL, ++ .static_pass_number = 0, ++ .tv_id = TV_NONE, ++ .properties_required = 0, ++ .properties_provided = 0, ++ .properties_destroyed = 0, ++ .todo_flags_start = 0, ++ .todo_flags_finish = TODO_dump_func ++ } ++}; ++ ++static bool gate_stackleak_track_stack(void) ++{ ++ return track_frame_size >= 0; ++} ++ ++static void stackleak_check_alloca(gimple_stmt_iterator *gsi) ++{ ++ gimple check_alloca; ++ tree fntype, fndecl, alloca_size; ++ ++ fntype = build_function_type_list(void_type_node, long_unsigned_type_node, NULL_TREE); ++ fndecl = build_fn_decl(check_function, fntype); ++ DECL_ASSEMBLER_NAME(fndecl); // for LTO ++ ++ // insert call to void pax_check_alloca(unsigned long size) ++ alloca_size = gimple_call_arg(gsi_stmt(*gsi), 0); ++ check_alloca = gimple_build_call(fndecl, 1, alloca_size); ++ gsi_insert_before(gsi, check_alloca, GSI_SAME_STMT); ++} ++ ++static void stackleak_add_instrumentation(gimple_stmt_iterator *gsi) ++{ ++ gimple track_stack; ++ tree fntype, fndecl; ++ ++ fntype = build_function_type_list(void_type_node, NULL_TREE); ++ fndecl = build_fn_decl(track_function, fntype); ++ DECL_ASSEMBLER_NAME(fndecl); // for LTO ++ ++ // insert call to void pax_track_stack(void) ++ track_stack = gimple_build_call(fndecl, 0); ++ gsi_insert_after(gsi, track_stack, GSI_CONTINUE_LINKING); ++} ++ ++#if BUILDING_GCC_VERSION == 4005 ++static bool gimple_call_builtin_p(gimple stmt, enum built_in_function code) ++{ ++ tree fndecl; ++ ++ if (!is_gimple_call(stmt)) ++ return false; ++ fndecl = gimple_call_fndecl(stmt); ++ if (!fndecl) ++ return false; ++ if (DECL_BUILT_IN_CLASS(fndecl) != BUILT_IN_NORMAL) ++ return false; ++// print_node(stderr, "pax", fndecl, 4); ++ return DECL_FUNCTION_CODE(fndecl) == code; ++} ++#endif ++ ++static bool is_alloca(gimple stmt) ++{ ++ if (gimple_call_builtin_p(stmt, BUILT_IN_ALLOCA)) ++ return true; ++ ++#if BUILDING_GCC_VERSION >= 4007 ++ if (gimple_call_builtin_p(stmt, BUILT_IN_ALLOCA_WITH_ALIGN)) ++ return true; ++#endif ++ ++ return false; ++} ++ ++static unsigned int execute_stackleak_tree_instrument(void) ++{ ++ basic_block bb, entry_bb; ++ bool prologue_instrumented = false, is_leaf = true; ++ ++ entry_bb = ENTRY_BLOCK_PTR_FOR_FUNCTION(cfun)->next_bb; ++ ++ // 1. loop through BBs and GIMPLE statements ++ FOR_EACH_BB(bb) { ++ gimple_stmt_iterator gsi; ++ ++ for (gsi = gsi_start_bb(bb); !gsi_end_p(gsi); gsi_next(&gsi)) { ++ gimple stmt; ++ ++ stmt = gsi_stmt(gsi); ++ ++ if (is_gimple_call(stmt)) ++ is_leaf = false; ++ ++ // gimple match: align 8 built-in BUILT_IN_NORMAL:BUILT_IN_ALLOCA attributes <tree_list 0xb7576450> ++ if (!is_alloca(stmt)) ++ continue; ++ ++ // 2. insert stack overflow check before each __builtin_alloca call ++ stackleak_check_alloca(&gsi); ++ ++ // 3. insert track call after each __builtin_alloca call ++ stackleak_add_instrumentation(&gsi); ++ if (bb == entry_bb) ++ prologue_instrumented = true; ++ } ++ } ++ ++ // special cases for some bad linux code: taking the address of static inline functions will materialize them ++ // but we mustn't instrument some of them as the resulting stack alignment required by the function call ABI ++ // will break other assumptions regarding the expected (but not otherwise enforced) register clobbering ABI. ++ // case in point: native_save_fl on amd64 when optimized for size clobbers rdx if it were instrumented here. ++ if (is_leaf && !TREE_PUBLIC(current_function_decl) && DECL_DECLARED_INLINE_P(current_function_decl)) ++ return 0; ++ if (is_leaf && !strncmp(IDENTIFIER_POINTER(DECL_NAME(current_function_decl)), "_paravirt_", 10)) ++ return 0; ++ ++ // 4. insert track call at the beginning ++ if (!prologue_instrumented) { ++ gimple_stmt_iterator gsi; ++ ++ bb = split_block_after_labels(ENTRY_BLOCK_PTR)->dest; ++ if (dom_info_available_p(CDI_DOMINATORS)) ++ set_immediate_dominator(CDI_DOMINATORS, bb, ENTRY_BLOCK_PTR); ++ gsi = gsi_start_bb(bb); ++ stackleak_add_instrumentation(&gsi); ++ } ++ ++ return 0; ++} ++ ++static unsigned int execute_stackleak_final(void) ++{ ++ rtx insn; ++ ++ if (cfun->calls_alloca) ++ return 0; ++ ++ // keep calls only if function frame is big enough ++ if (get_frame_size() >= track_frame_size) ++ return 0; ++ ++ // 1. find pax_track_stack calls ++ for (insn = get_insns(); insn; insn = NEXT_INSN(insn)) { ++ // rtl match: (call_insn 8 7 9 3 (call (mem (symbol_ref ("pax_track_stack") [flags 0x41] <function_decl 0xb7470e80 pax_track_stack>) [0 S1 A8]) (4)) -1 (nil) (nil)) ++ rtx body; ++ ++ if (!CALL_P(insn)) ++ continue; ++ body = PATTERN(insn); ++ if (GET_CODE(body) != CALL) ++ continue; ++ body = XEXP(body, 0); ++ if (GET_CODE(body) != MEM) ++ continue; ++ body = XEXP(body, 0); ++ if (GET_CODE(body) != SYMBOL_REF) ++ continue; ++ if (strcmp(XSTR(body, 0), track_function)) ++ continue; ++// warning(0, "track_frame_size: %d %ld %d", cfun->calls_alloca, get_frame_size(), track_frame_size); ++ // 2. delete call ++ insn = delete_insn_and_edges(insn); ++#if BUILDING_GCC_VERSION >= 4007 ++ if (GET_CODE(insn) == NOTE && NOTE_KIND(insn) == NOTE_INSN_CALL_ARG_LOCATION) ++ insn = delete_insn_and_edges(insn); ++#endif ++ } ++ ++// print_simple_rtl(stderr, get_insns()); ++// print_rtl(stderr, get_insns()); ++// warning(0, "track_frame_size: %d %ld %d", cfun->calls_alloca, get_frame_size(), track_frame_size); ++ ++ return 0; ++} ++ ++int plugin_init(struct plugin_name_args *plugin_info, struct plugin_gcc_version *version) ++{ ++ const char * const plugin_name = plugin_info->base_name; ++ const int argc = plugin_info->argc; ++ const struct plugin_argument * const argv = plugin_info->argv; ++ int i; ++ struct register_pass_info stackleak_tree_instrument_pass_info = { ++ .pass = &stackleak_tree_instrument_pass.pass, ++// .reference_pass_name = "tree_profile", ++ .reference_pass_name = "optimized", ++ .ref_pass_instance_number = 1, ++ .pos_op = PASS_POS_INSERT_BEFORE ++ }; ++ struct register_pass_info stackleak_final_pass_info = { ++ .pass = &stackleak_final_rtl_opt_pass.pass, ++ .reference_pass_name = "final", ++ .ref_pass_instance_number = 1, ++ .pos_op = PASS_POS_INSERT_BEFORE ++ }; ++ ++ if (!plugin_default_version_check(version, &gcc_version)) { ++ error(G_("incompatible gcc/plugin versions")); ++ return 1; ++ } ++ ++ register_callback(plugin_name, PLUGIN_INFO, NULL, &stackleak_plugin_info); ++ ++ for (i = 0; i < argc; ++i) { ++ if (!strcmp(argv[i].key, "track-lowest-sp")) { ++ if (!argv[i].value) { ++ error(G_("no value supplied for option '-fplugin-arg-%s-%s'"), plugin_name, argv[i].key); ++ continue; ++ } ++ track_frame_size = atoi(argv[i].value); ++ if (argv[i].value[0] < '0' || argv[i].value[0] > '9' || track_frame_size < 0) ++ error(G_("invalid option argument '-fplugin-arg-%s-%s=%s'"), plugin_name, argv[i].key, argv[i].value); ++ continue; ++ } ++ if (!strcmp(argv[i].key, "initialize-locals")) { ++ if (argv[i].value) { ++ error(G_("invalid option argument '-fplugin-arg-%s-%s=%s'"), plugin_name, argv[i].key, argv[i].value); ++ continue; ++ } ++ init_locals = true; ++ continue; ++ } ++ error(G_("unkown option '-fplugin-arg-%s-%s'"), plugin_name, argv[i].key); ++ } ++ ++ register_callback(plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL, &stackleak_tree_instrument_pass_info); ++ register_callback(plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL, &stackleak_final_pass_info); ++ ++ return 0; ++} |