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. --- .../unix/sysv/linux/sparc/sparc64/register-dump.h | 273 --------------------- 1 file changed, 273 deletions(-) delete mode 100644 sysdeps/unix/sysv/linux/sparc/sparc64/register-dump.h (limited to 'sysdeps/unix/sysv/linux/sparc/sparc64') diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/register-dump.h b/sysdeps/unix/sysv/linux/sparc/sparc64/register-dump.h deleted file mode 100644 index de68ccbd0e..0000000000 --- a/sysdeps/unix/sysv/linux/sparc/sparc64/register-dump.h +++ /dev/null @@ -1,273 +0,0 @@ -/* Dump registers. - Copyright (C) 1999-2022 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 <_itoa.h> - -/* We will print the register dump in this format: - - TSTATE: XXXXXXXXXXXXXXXX TPC: XXXXXXXXXXXXXXXX TNPC: XXXXXXXXXXXXXXXX - Y: XXXXXXXX - g0: 0000000000000000 g1: XXXXXXXXXXXXXXXX g2: XXXXXXXXXXXXXXXX - g3: XXXXXXXXXXXXXXXX g4: XXXXXXXXXXXXXXXX g5: XXXXXXXXXXXXXXXX - g6: XXXXXXXXXXXXXXXX g7: XXXXXXXXXXXXXXXX - o0: XXXXXXXXXXXXXXXX o1: XXXXXXXXXXXXXXXX o2: XXXXXXXXXXXXXXXX - o3: XXXXXXXXXXXXXXXX o4: XXXXXXXXXXXXXXXX o5: XXXXXXXXXXXXXXXX - sp: XXXXXXXXXXXXXXXX o7: XXXXXXXXXXXXXXXX - l0: XXXXXXXXXXXXXXXX l1: XXXXXXXXXXXXXXXX l2: XXXXXXXXXXXXXXXX - l3: XXXXXXXXXXXXXXXX l4: XXXXXXXXXXXXXXXX l5: XXXXXXXXXXXXXXXX - l6: XXXXXXXXXXXXXXXX l7: XXXXXXXXXXXXXXXX - i0: XXXXXXXXXXXXXXXX i1: XXXXXXXXXXXXXXXX i2: XXXXXXXXXXXXXXXX - i3: XXXXXXXXXXXXXXXX i4: XXXXXXXXXXXXXXXX i5: XXXXXXXXXXXXXXXX - fp: XXXXXXXXXXXXXXXX i7: XXXXXXXXXXXXXXXX - - Mask: XXXXXXXXXXXXXXXX XFSR: XXXXXXXXXXXXXXXX GSR: XX FPRS: X - f0: XXXXXXXXXXXXXXXX f2: XXXXXXXXXXXXXXXX f4: XXXXXXXXXXXXXXXX - f6: XXXXXXXXXXXXXXXX f8: XXXXXXXXXXXXXXXX f10: XXXXXXXXXXXXXXXX - f12: XXXXXXXXXXXXXXXX f14: XXXXXXXXXXXXXXXX f16: XXXXXXXXXXXXXXXX - f18: XXXXXXXXXXXXXXXX f20: XXXXXXXXXXXXXXXX f22: XXXXXXXXXXXXXXXX - f24: XXXXXXXXXXXXXXXX f26: XXXXXXXXXXXXXXXX f28: XXXXXXXXXXXXXXXX - f30: XXXXXXXXXXXXXXXX f32: XXXXXXXXXXXXXXXX f34: XXXXXXXXXXXXXXXX - f36: XXXXXXXXXXXXXXXX f38: XXXXXXXXXXXXXXXX f40: XXXXXXXXXXXXXXXX - f42: XXXXXXXXXXXXXXXX f44: XXXXXXXXXXXXXXXX f46: XXXXXXXXXXXXXXXX - f48: XXXXXXXXXXXXXXXX f50: XXXXXXXXXXXXXXXX f52: XXXXXXXXXXXXXXXX - f54: XXXXXXXXXXXXXXXX f56: XXXXXXXXXXXXXXXX f58: XXXXXXXXXXXXXXXX - f60: XXXXXXXXXXXXXXXX f62: XXXXXXXXXXXXXXXX - - */ - -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'; -} - -/* The sparc64 kernel signal frame for SA_SIGINFO is defined as: - - struct rt_signal_frame - { - struct sparc_stackf ss; - siginfo_t info; - struct pt_regs regs; <- void *ctx - __siginfo_fpu_t *fpu_save; - stack_t stack; - sigset_t mask; - __siginfo_rwin_t *rwin_save; - }; - - Unlike other architectures, sparc32 passes pt_regs32 REGS pointers as - the third argument to a sa_sigaction handler with SA_SIGINFO enabled. */ - -static void -register_dump (int fd, void *ctx) -{ - char regs[36][16]; - char fregs[68][8]; - struct iovec iov[150]; - size_t nr = 0; - int i; - struct pt_regs *ptregs = (struct pt_regs*) ((siginfo_t *)ctx + 1); - unsigned long *r = (unsigned long *) (ptregs->u_regs[14] + STACK_BIAS); - __siginfo_fpu_t *f = (__siginfo_fpu_t *)(ptregs + 1); - struct kernel_sigset_t { - unsigned long sig[1]; - } *mask = (struct kernel_sigset_t *)((stack_t *)(f + 1) + 1); - -#define ADD_STRING(str) \ - iov[nr].iov_base = (char *) str; \ - iov[nr].iov_len = strlen (str); \ - ++nr -#define ADD_MEM(str, len) \ - iov[nr].iov_base = str; \ - iov[nr].iov_len = len; \ - ++nr - - /* Generate strings of register contents. */ - hexvalue (ptregs->tstate, regs[0], 16); - hexvalue (ptregs->tpc, regs[1], 16); - hexvalue (ptregs->tnpc, regs[2], 16); - hexvalue (ptregs->y, regs[3], 8); - for (i = 1; i <= 15; i++) - hexvalue (ptregs->u_regs[i], regs[3+i], 16); - for (i = 0; i <= 15; i++) - hexvalue (r[i], regs[19+i], 16); - hexvalue (mask->sig[0], regs[35], 16); - - /* Generate the output. */ - ADD_STRING ("Register dump:\n\n TSTATE: "); - ADD_MEM (regs[0], 16); - ADD_STRING (" TPC: "); - ADD_MEM (regs[1], 16); - ADD_STRING (" TNPC: "); - ADD_MEM (regs[2], 16); - ADD_STRING ("\n Y: "); - ADD_MEM (regs[3], 8); - ADD_STRING ("\n g0: 0000000000000000 g1: "); - ADD_MEM (regs[4], 16); - ADD_STRING (" g2: "); - ADD_MEM (regs[5], 16); - ADD_STRING ("\n g3: "); - ADD_MEM (regs[6], 16); - ADD_STRING (" g4: "); - ADD_MEM (regs[7], 16); - ADD_STRING (" g5: "); - ADD_MEM (regs[8], 16); - ADD_STRING ("\n g6: "); - ADD_MEM (regs[9], 16); - ADD_STRING (" g7: "); - ADD_MEM (regs[10], 16); - ADD_STRING ("\n o0: "); - ADD_MEM (regs[11], 16); - ADD_STRING (" o1: "); - ADD_MEM (regs[12], 16); - ADD_STRING (" o2: "); - ADD_MEM (regs[13], 16); - ADD_STRING ("\n o3: "); - ADD_MEM (regs[14], 16); - ADD_STRING (" o4: "); - ADD_MEM (regs[15], 16); - ADD_STRING (" o5: "); - ADD_MEM (regs[16], 16); - ADD_STRING ("\n sp: "); - ADD_MEM (regs[17], 16); - ADD_STRING (" o7: "); - ADD_MEM (regs[18], 16); - ADD_STRING ("\n l0: "); - ADD_MEM (regs[19], 16); - ADD_STRING (" l1: "); - ADD_MEM (regs[20], 16); - ADD_STRING (" l2: "); - ADD_MEM (regs[21], 16); - ADD_STRING ("\n l3: "); - ADD_MEM (regs[22], 16); - ADD_STRING (" l4: "); - ADD_MEM (regs[23], 16); - ADD_STRING (" l5: "); - ADD_MEM (regs[24], 16); - ADD_STRING ("\n l6: "); - ADD_MEM (regs[25], 16); - ADD_STRING (" l7: "); - ADD_MEM (regs[26], 16); - ADD_STRING ("\n i0: "); - ADD_MEM (regs[27], 16); - ADD_STRING (" i1: "); - ADD_MEM (regs[28], 16); - ADD_STRING (" i2: "); - ADD_MEM (regs[29], 16); - ADD_STRING ("\n i3: "); - ADD_MEM (regs[30], 16); - ADD_STRING (" i4: "); - ADD_MEM (regs[31], 16); - ADD_STRING (" i5: "); - ADD_MEM (regs[32], 16); - ADD_STRING ("\n fp: "); - ADD_MEM (regs[33], 16); - ADD_STRING (" i7: "); - ADD_MEM (regs[34], 16); - ADD_STRING ("\n\n Mask: "); - ADD_MEM (regs[35], 16); - - if (f != NULL) - { - for (i = 0; i < 64; i++) - hexvalue (f->si_float_regs[i], fregs[i], 8); - hexvalue (f->si_fsr, fregs[64], 16); - hexvalue (f->si_gsr, fregs[66], 2); - hexvalue (f->si_fprs, fregs[67], 1); - ADD_STRING (" XFSR: "); - ADD_MEM (fregs[64], 16); - ADD_STRING (" GSR: "); - ADD_MEM (fregs[66], 2); - ADD_STRING (" FPRS: "); - ADD_MEM (fregs[67], 1); - ADD_STRING ("\n f0: "); - ADD_MEM (fregs[0], 16); - ADD_STRING (" f2: "); - ADD_MEM (fregs[2], 16); - ADD_STRING (" f4: "); - ADD_MEM (fregs[4], 16); - ADD_STRING ("\n f6: "); - ADD_MEM (fregs[6], 16); - ADD_STRING (" f8: "); - ADD_MEM (fregs[8], 16); - ADD_STRING (" f10: "); - ADD_MEM (fregs[10], 16); - ADD_STRING ("\n f12: "); - ADD_MEM (fregs[12], 16); - ADD_STRING (" f14: "); - ADD_MEM (fregs[14], 16); - ADD_STRING (" f16: "); - ADD_MEM (fregs[16], 16); - ADD_STRING ("\n f18: "); - ADD_MEM (fregs[18], 16); - ADD_STRING (" f20: "); - ADD_MEM (fregs[20], 16); - ADD_STRING (" f22: "); - ADD_MEM (fregs[22], 16); - ADD_STRING ("\n f24: "); - ADD_MEM (fregs[24], 16); - ADD_STRING (" f26: "); - ADD_MEM (fregs[26], 16); - ADD_STRING (" f28: "); - ADD_MEM (fregs[28], 16); - ADD_STRING ("\n f30: "); - ADD_MEM (fregs[30], 16); - ADD_STRING (" f32: "); - ADD_MEM (fregs[32], 16); - ADD_STRING (" f34: "); - ADD_MEM (fregs[34], 16); - ADD_STRING ("\n f36: "); - ADD_MEM (fregs[36], 16); - ADD_STRING (" f38: "); - ADD_MEM (fregs[38], 16); - ADD_STRING (" f40: "); - ADD_MEM (fregs[40], 16); - ADD_STRING ("\n f42: "); - ADD_MEM (fregs[42], 16); - ADD_STRING (" f44: "); - ADD_MEM (fregs[44], 16); - ADD_STRING (" f46: "); - ADD_MEM (fregs[46], 16); - ADD_STRING ("\n f48: "); - ADD_MEM (fregs[48], 16); - ADD_STRING (" f50: "); - ADD_MEM (fregs[50], 16); - ADD_STRING (" f52: "); - ADD_MEM (fregs[52], 16); - ADD_STRING ("\n f54: "); - ADD_MEM (fregs[54], 16); - ADD_STRING (" f56: "); - ADD_MEM (fregs[56], 16); - ADD_STRING (" f58: "); - ADD_MEM (fregs[58], 16); - ADD_STRING ("\n f60: "); - ADD_MEM (fregs[60], 16); - ADD_STRING (" f62: "); - ADD_MEM (fregs[62], 16); - } - - ADD_STRING ("\n"); - - /* Write the stuff out. */ - writev (fd, iov, nr); -} - - -#define REGISTER_DUMP register_dump (fd, ctx) -- cgit 1.4.1