From 65ccd641bacea33be23d51da737c2de7543d0f5e Mon Sep 17 00:00:00 2001 From: Adhemerval Zanella Date: Mon, 20 Dec 2021 08:41:55 -0300 Subject: debug: Remove catchsegv and libSegfault (BZ #14913) Trapping SIGSEGV within the process is error-prone, adds security issues, and modern analysis design tends to happen out of the process (either by attaching a debugger or by post-mortem analysis). The libSegfault also has some design problems, it uses non async-signal-safe function (backtrace) on signal handler. There are multiple alternatives if users do want to use similar functionality, such as sigsegv gnulib module or libsegfault. --- sysdeps/unix/sysv/linux/ia64/register-dump.h | 180 --------------------------- 1 file changed, 180 deletions(-) delete mode 100644 sysdeps/unix/sysv/linux/ia64/register-dump.h (limited to 'sysdeps/unix/sysv/linux/ia64/register-dump.h') diff --git a/sysdeps/unix/sysv/linux/ia64/register-dump.h b/sysdeps/unix/sysv/linux/ia64/register-dump.h deleted file mode 100644 index 4c7c4002cb..0000000000 --- a/sysdeps/unix/sysv/linux/ia64/register-dump.h +++ /dev/null @@ -1,180 +0,0 @@ -/* Dump registers. - Copyright (C) 2004-2022 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - . */ - -#include -#include -#include <_itoa.h> - -/* We will print the register dump in this format: - - GP: XXXXXXXXXXXXXXXX R2: XXXXXXXXXXXXXXXX R3: XXXXXXXXXXXXXXXX - R8: XXXXXXXXXXXXXXXX R9: XXXXXXXXXXXXXXXX R10: XXXXXXXXXXXXXXXX - R11: XXXXXXXXXXXXXXXX SP: XXXXXXXXXXXXXXXX TP: XXXXXXXXXXXXXXXX - R14: XXXXXXXXXXXXXXXX R15: XXXXXXXXXXXXXXXX R16: XXXXXXXXXXXXXXXX - R17: XXXXXXXXXXXXXXXX R18: XXXXXXXXXXXXXXXX R19: XXXXXXXXXXXXXXXX - R20: XXXXXXXXXXXXXXXX R21: XXXXXXXXXXXXXXXX R22: XXXXXXXXXXXXXXXX - R23: XXXXXXXXXXXXXXXX R24: XXXXXXXXXXXXXXXX R25: XXXXXXXXXXXXXXXX - R26: XXXXXXXXXXXXXXXX R27: XXXXXXXXXXXXXXXX R28: XXXXXXXXXXXXXXXX - R29: XXXXXXXXXXXXXXXX R30: XXXXXXXXXXXXXXXX R31: XXXXXXXXXXXXXXXX - - RP: XXXXXXXXXXXXXXXX B6: XXXXXXXXXXXXXXXX B7: XXXXXXXXXXXXXXXX - - IP: XXXXXXXXXXXXXXXX RSC: XXXXXXXXXXXXXXXX PR: XXXXXXXXXXXXXXXX - PFS: XXXXXXXXXXXXXXXX UNAT: XXXXXXXXXXXXXXXX CFM: XXXXXXXXXXXXXXXX - CCV: XXXXXXXXXXXXXXXX FPSR: XXXXXXXXXXXXXXXX - - F32: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX F33: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX - F34: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX F35: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX -... - F124: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX F125: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX - F126: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX F127: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX - */ - -static void -hexvalue (unsigned long int value, char *buf, size_t len) -{ - char *cp = _itoa_word (value, buf + len, 16, 0); - while (cp > buf) - *--cp = '0'; -} - -static void -regvalue (unsigned long int *value, char letter, int regno, char *buf) -{ - int n = regno >= 100 ? 3 : regno >= 10 ? 2 : 1; - buf[0] = ' '; - buf[1] = letter; - _itoa_word (regno, buf + 2 + n, 10, 0); - buf[2 + n] = ':'; - for (++n; n <= 4; ++n) - buf[2 + n] = ' '; - hexvalue (value[0], buf + 7, 16); - if (letter == 'F') - { - hexvalue (value[1], buf + 7 + 16, 16); - buf[7 + 32] = '\n'; - } - else - buf[7 + 16] = '\n'; -} - -static void -register_dump (int fd, struct sigcontext *ctx) -{ - char gpregs[32 - 5][8 + 16]; - char fpregs[128 - 32][8 + 32]; - char bpregs[3][8 + 16]; - char spregs[8][16]; - struct iovec iov[146]; - size_t nr = 0; - int i; - -#define ADD_STRING(str) \ - do \ - { \ - iov[nr].iov_base = (char *) str; \ - iov[nr].iov_len = strlen (str); \ - ++nr; \ - } \ - while (0) -#define ADD_MEM(str, len) \ - do \ - { \ - iov[nr].iov_base = str; \ - iov[nr].iov_len = len; \ - ++nr; \ - } \ - while (0) - - /* Generate strings of register contents. */ - for (i = 1; i < 4; ++i) - { - regvalue (&ctx->sc_gr[i], 'R', i, gpregs[i - 1]); - if (ctx->sc_nat & (1L << i)) - memcpy (gpregs[i - 1] + 7, "NaT ", 16); - } - for (i = 8; i < 32; ++i) - { - regvalue (&ctx->sc_gr[i], 'R', i, gpregs[i - 5]); - if (ctx->sc_nat & (1L << i)) - memcpy (gpregs[i - 1] + 7, "NaT ", 16); - } - memcpy (gpregs[0] + 1, "GP:", 3); - memcpy (gpregs[7] + 1, "SP: ", 4); - memcpy (gpregs[8] + 1, "TP: ", 4); - - regvalue (&ctx->sc_br[0], 'B', 0, bpregs[0]); - regvalue (&ctx->sc_br[6], 'B', 6, bpregs[1]); - regvalue (&ctx->sc_br[7], 'B', 7, bpregs[2]); - memcpy (bpregs[0] + 1, "RP:", 3); - - if (ctx->sc_flags & IA64_SC_FLAG_FPH_VALID) - for (i = 32; i < 128; ++i) - regvalue (&ctx->sc_fr[i].u.bits[0], 'F', i, fpregs[i - 32]); - - hexvalue (ctx->sc_ip, spregs[0], sizeof (spregs[0])); - hexvalue (ctx->sc_ar_rsc, spregs[1], sizeof (spregs[1])); - hexvalue (ctx->sc_pr, spregs[2], sizeof (spregs[2])); - hexvalue (ctx->sc_ar_pfs, spregs[3], sizeof (spregs[3])); - hexvalue (ctx->sc_ar_unat, spregs[4], sizeof (spregs[4])); - hexvalue (ctx->sc_cfm, spregs[5], sizeof (spregs[5])); - hexvalue (ctx->sc_ar_ccv, spregs[6], sizeof (spregs[6])); - hexvalue (ctx->sc_ar_fpsr, spregs[7], sizeof (spregs[7])); - - /* Generate the output. */ - ADD_STRING ("Register dump:\n\n"); - - for (i = 0; i < 32 - 5; ++i) - ADD_MEM (gpregs[i], sizeof (gpregs[0]) - 1 + ((i % 3) == 2)); - ADD_STRING ("\n"); - - for (i = 0; i < 3; ++i) - ADD_MEM (bpregs[i], sizeof (bpregs[0]) - 1); - - ADD_STRING ("\n\n IP: "); - ADD_MEM (spregs[0], sizeof (spregs[0])); - ADD_STRING (" RSC: "); - ADD_MEM (spregs[1], sizeof (spregs[0])); - ADD_STRING (" PR: "); - ADD_MEM (spregs[2], sizeof (spregs[0])); - ADD_STRING ("\n PFS: "); - ADD_MEM (spregs[3], sizeof (spregs[0])); - ADD_STRING (" UNAT: "); - ADD_MEM (spregs[4], sizeof (spregs[0])); - ADD_STRING (" CFM: "); - ADD_MEM (spregs[5], sizeof (spregs[0])); - ADD_STRING ("\n CCV: "); - ADD_MEM (spregs[6], sizeof (spregs[0])); - ADD_STRING (" FPSR: "); - ADD_MEM (spregs[7], sizeof (spregs[0])); - ADD_STRING ("\n"); - - if (ctx->sc_flags & IA64_SC_FLAG_FPH_VALID) - { - ADD_STRING ("\n"); - - for (i = 0; i < 128 - 32; ++i) - ADD_MEM (fpregs[i], sizeof (fpregs[0]) - 1 + (i & 1)); - } - - /* Write the stuff out. */ - writev (fd, iov, nr); -} - - -#define REGISTER_DUMP register_dump (fd, ctx) -- cgit 1.4.1