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a43565ac44
This patch refactor sigcontextinfo.h header to use SA_SIGINFO as default
for both gmon and debug implementations. This allows simplify
profil-counter.h on Linux to use a single implementation and remove the
requirements for newer ports to redefine __sigaction/sigaction to use
SA_SIGINFO.
The GET_PC macro is also replaced with a function sigcontext_get_pc that
returns an uintptr_t instead of a void pointer. It allows easier convertion
to integer on ILP32 architecture, such as x32, without the need to suppress
compiler warnings.
The patch also requires some refactor of register-dump.h file for some
architectures (to reflect it is now called from a sa_sigaction instead of
sa_handler signal context).
- Alpha, i386, and s390 are straighfoward to take in consideration the
new argument type.
- ia64 takes in consideration the kernel pass a struct sigcontextt
as third argument for sa_sigaction.
- sparc take in consideration the kernel pass a pt_regs struct
as third argument for sa_sigaction.
- m68k dummy function is removed and the FP state is dumped on
register_dump itself.
- For SH the register-dump.h file is consolidate on a common implementation
and the floating-point state is checked based on ownedfp field.
The register_dump does not change its output format in any affected
architecture.
I checked on x86_64-linux-gnu, i686-linux-gnu, aarch64-linux-gnu,
arm-linux-gnueabihf, sparcv9-linux-gnu, sparc64-linux-gnu, powerpc-linux-gnu,
powerpc64-linux-gnu, and powerpc64le-linux-gnu.
I also checked the libSegFault.so through catchsegv on alpha-linux-gnu,
m68k-linux-gnu and sh4-linux-gnu to confirm the output has not changed.
Adhemerval Zanella <adhemerval.zanella@linaro.org>
Florian Weimer <fweimer@redhat.com>
* debug/segfault.c (install_handler): Use SA_SIGINFO if defined.
* sysdeps/generic/profil-counter.h (__profil_counter): Cast to
uintptr_t.
* sysdeps/generic/sigcontextinfo.h (GET_PC): Rename to
sigcontext_get_pc and return aligned cast to uintptr_t.
* sysdeps/mach/hurd/i386/sigcontextinfo.h (GET_PC): Likewise.
* sysdeps/posix/profil.c (profil_count): Change PC argument to
uintptr_t.
(__profil): Use SA_SIGINFO.
* sysdeps/posix/sprofil.c (profil_count): Change PCP argument to
uintptr_t.
(__sprofil): Use SA_SIGINFO.
* sysdeps/unix/sysv/linux/profil-counter.h: New file.
* sysdeps/unix/sysv/linux/aarch64/profil-counter.h: Remove file.
* sysdeps/unix/sysv/linux/csky/profil-counter.h: Likewise.
* sysdeps/unix/sysv/linux/hppa/profil-counter.h: Likewise.
* sysdeps/unix/sysv/linux/i386/profil-counter.h: Likewise.
* sysdeps/unix/sysv/linux/ia64/profil-counter.h: Likewise.
* sysdeps/unix/sysv/linux/microblaze/profil-counter.h: Likewise.
* sysdeps/unix/sysv/linux/mips/profil-counter.h: Likewise.
* sysdeps/unix/sysv/linux/nios2/profil-counter.h: Likewise.
* sysdeps/unix/sysv/linux/powerpc/profil-counter.h: Likewise.
* sysdeps/unix/sysv/linux/x86_64/profil-counter.h: Likewise.
* sysdeps/unix/sysv/linux/riscv/profil-counter.h: Likewise.
* sysdeps/sysv/linux/s390/s390-32/profil-counter.h: Likewise.
* sysdeps/sysv/linux/s390/s390-64/profil-counter.h: Likewise.
* sysdeps/unix/sysv/linux/sh/profil-counter.h: Likewise.
* sysdeps/unix/sysv/linux/arm/profil-counter.h (__profil_counter):
Assume SA_SIGINFO and use sigcontext_get_pc instead of GET_PC.
* sysdeps/unix/sysv/linux/sparc/profil-counter.h: New file.
* sysdeps/unix/sysv/linux/sparc/sparc64/profil-counter.h: Remove file.
* sysdeps/unix/sysv/linux/sparc/sparc32/profil-counter.h: Likewise.
* sysdpes/unix/sysv/linux/aarch64/sigcontextinfo.h (SIGCONTEXT,
GET_PC, __sigaction, sigaction): Remove defines.
(sigcontext_get_pc): New function.
* sysdeps/unix/sysv/linux/alpha/sigcontextinfo.h: Likewise.
* sysdeps/unix/sysv/linux/arm/sigcontextinfo.h: Likewise.
* sysdeps/unix/sysv/linux/csky/sigcontextinfo.h: Likewise.
* sysdeps/unix/sysv/linux/hppa/sigcontextinfo.h: Likewise.
* sysdeps/unix/sysv/linux/i386/sigcontextinfo.h: Likewise.
* sysdeps/unix/sysv/linux/ia64/sigcontextinfo.h: Likewise.
* sysdeps/unix/sysv/linux/m68k/sigcontextinfo.h: Likewise.
* sysdeps/unix/sysv/linux/mips/sigcontextinfo.h: Likewise.
* sysdeps/unix/sysv/linux/nios2/sigcontextinfo.h: Likewise.
* sysdeps/unix/sysv/linux/s390/sigcontextinfo.h: Likewise.
* sysdeps/unix/sysv/linux/microblaze/sigcontextinfo.h: Likewise.
* sysdeps/unix/sysv/linux/powerpc/sigcontextinfo.h: Likewise.
* sysdeps/unix/sysv/linux/riscv/sigcontextinfo.h: Likewise.
* sysdeps/unix/sysv/linux/sh/sigcontextinfo.h: Likewise.
* sysdeps/sysv/linux/sparc/sparc32/sigcontextinfo.h: Likewise.
* sysdeps/sysv/linux/sparc/sparc64/sigcontextinfo.h: Likewise.
* sysdeps/unix/sysv/linux/x86_64/sigcontextinfo.h: Likewise.
* sysdeps/unix/sysv/linux/alpha/register-dump.h (register_dump):
Handle CTX argument as ucontext_t.
* sysdeps/unix/sysv/linux/i386/register-dump.h: Likewise.
Likewise.
* sysdeps/unix/sysv/linux/m68k/register-dump.h: Likewise.
* sysdeps/sysv/linux/s390/s390-32/register-dump.h: Likewise.
* sysdeps/sysv/linux/s390/s390-64/register-dump.h: Likewise.
* sysdeps/unix/sysv/linux/sh/register-dump.h: New file.
* sysdeps/unix/sysv/linux/sh/sh4/register-dump.h: Remove File.
* sysdeps/unix/sysv/linux/sh/sh3/register-dump.h: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc32/register-dump.h: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/register-dump.h: Likewise.
* sysdeps/unix/sysv/linux/Makefile (tests-internal): Add
tst-sigcontextinfo-get_pc.
* sysdeps/unix/sysv/linux/tst-sigcontextinfo-get_pc.c: New file.
(CFLAGS-tst-sigcontextinfo-get_pc.c): New rule.
252 lines
8.8 KiB
C
252 lines
8.8 KiB
C
/* Dump registers.
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Copyright (C) 1998-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sys/uio.h>
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#include <_itoa.h>
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/* We will print the register dump in this format:
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EAX: XXXXXXXX EBX: XXXXXXXX ECX: XXXXXXXX EDX: XXXXXXXX
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ESI: XXXXXXXX EDI: XXXXXXXX EBP: XXXXXXXX ESP: XXXXXXXX
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EIP: XXXXXXXX EFLAGS: XXXXXXXX
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CS: XXXX DS: XXXX ES: XXXX FS: XXXX GS: XXXX SS: XXXX
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Trap: XXXXXXXX Error: XXXXXXXX OldMask: XXXXXXXX
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ESP/SIGNAL: XXXXXXXX CR2: XXXXXXXX
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FPUCW: XXXXXXXX FPUSW: XXXXXXXX TAG: XXXXXXXX
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IPOFF: XXXXXXXX CSSEL: XXXX DATAOFF: XXXXXXXX DATASEL: XXXX
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ST(0) XXXX XXXXXXXXXXXXXXXX ST(1) XXXX XXXXXXXXXXXXXXXX
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ST(2) XXXX XXXXXXXXXXXXXXXX ST(3) XXXX XXXXXXXXXXXXXXXX
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ST(4) XXXX XXXXXXXXXXXXXXXX ST(5) XXXX XXXXXXXXXXXXXXXX
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ST(6) XXXX XXXXXXXXXXXXXXXX ST(7) XXXX XXXXXXXXXXXXXXXX
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*/
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static void
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hexvalue (unsigned long int value, char *buf, size_t len)
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{
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char *cp = _itoa_word (value, buf + len, 16, 0);
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while (cp > buf)
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*--cp = '0';
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}
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static void
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register_dump (int fd, struct ucontext_t *ctx)
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{
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char regs[21][8];
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char fpregs[31][8];
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struct iovec iov[97];
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size_t nr = 0;
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#define ADD_STRING(str) \
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iov[nr].iov_base = (char *) str; \
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iov[nr].iov_len = strlen (str); \
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++nr
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#define ADD_MEM(str, len) \
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iov[nr].iov_base = str; \
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iov[nr].iov_len = len; \
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++nr
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/* Generate strings of register contents. */
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hexvalue (ctx->uc_mcontext.gregs[REG_EAX], regs[0], 8);
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hexvalue (ctx->uc_mcontext.gregs[REG_EBX], regs[1], 8);
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hexvalue (ctx->uc_mcontext.gregs[REG_ECX], regs[2], 8);
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hexvalue (ctx->uc_mcontext.gregs[REG_EDX], regs[3], 8);
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hexvalue (ctx->uc_mcontext.gregs[REG_ESI], regs[4], 8);
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hexvalue (ctx->uc_mcontext.gregs[REG_EDI], regs[5], 8);
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hexvalue (ctx->uc_mcontext.gregs[REG_EBP], regs[6], 8);
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hexvalue (ctx->uc_mcontext.gregs[REG_ESP], regs[7], 8);
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hexvalue (ctx->uc_mcontext.gregs[REG_EIP], regs[8], 8);
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hexvalue (ctx->uc_flags, regs[9], 8);
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hexvalue (ctx->uc_mcontext.gregs[REG_CS], regs[10], 4);
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hexvalue (ctx->uc_mcontext.gregs[REG_DS], regs[11], 4);
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hexvalue (ctx->uc_mcontext.gregs[REG_ES], regs[12], 4);
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hexvalue (ctx->uc_mcontext.gregs[REG_FS], regs[13], 4);
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hexvalue (ctx->uc_mcontext.gregs[REG_GS], regs[14], 4);
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hexvalue (ctx->uc_mcontext.gregs[REG_SS], regs[15], 4);
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hexvalue (ctx->uc_mcontext.gregs[REG_TRAPNO], regs[16], 8);
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hexvalue (ctx->uc_mcontext.gregs[REG_ERR], regs[17], 8);
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hexvalue (ctx->uc_mcontext.oldmask, regs[18], 8);
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hexvalue (ctx->uc_mcontext.gregs[REG_UESP], regs[19], 8);
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hexvalue (ctx->uc_mcontext.cr2, regs[20], 8);
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/* Generate the output. */
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ADD_STRING ("Register dump:\n\n EAX: ");
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ADD_MEM (regs[0], 8);
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ADD_STRING (" EBX: ");
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ADD_MEM (regs[1], 8);
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ADD_STRING (" ECX: ");
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ADD_MEM (regs[2], 8);
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ADD_STRING (" EDX: ");
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ADD_MEM (regs[3], 8);
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ADD_STRING ("\n ESI: ");
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ADD_MEM (regs[4], 8);
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ADD_STRING (" EDI: ");
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ADD_MEM (regs[5], 8);
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ADD_STRING (" EBP: ");
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ADD_MEM (regs[6], 8);
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ADD_STRING (" ESP: ");
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ADD_MEM (regs[7], 8);
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ADD_STRING ("\n\n EIP: ");
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ADD_MEM (regs[8], 8);
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ADD_STRING (" EFLAGS: ");
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ADD_MEM (regs[9], 8);
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ADD_STRING ("\n\n CS: ");
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ADD_MEM (regs[10], 4);
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ADD_STRING (" DS: ");
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ADD_MEM (regs[11], 4);
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ADD_STRING (" ES: ");
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ADD_MEM (regs[12], 4);
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ADD_STRING (" FS: ");
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ADD_MEM (regs[13], 4);
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ADD_STRING (" GS: ");
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ADD_MEM (regs[14], 4);
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ADD_STRING (" SS: ");
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ADD_MEM (regs[15], 4);
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ADD_STRING ("\n\n Trap: ");
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ADD_MEM (regs[16], 8);
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ADD_STRING (" Error: ");
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ADD_MEM (regs[17], 8);
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ADD_STRING (" OldMask: ");
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ADD_MEM (regs[18], 8);
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ADD_STRING ("\n ESP/signal: ");
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ADD_MEM (regs[19], 8);
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ADD_STRING (" CR2: ");
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ADD_MEM (regs[20], 8);
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/* Generate output for the FPU control/status registers. */
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hexvalue (ctx->__fpregs_mem.cw, fpregs[0], 8);
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hexvalue (ctx->__fpregs_mem.sw, fpregs[1], 8);
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hexvalue (ctx->__fpregs_mem.tag, fpregs[2], 8);
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hexvalue (ctx->__fpregs_mem.ipoff, fpregs[3], 8);
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hexvalue (ctx->__fpregs_mem.cssel, fpregs[4], 4);
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hexvalue (ctx->__fpregs_mem.dataoff, fpregs[5], 8);
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hexvalue (ctx->__fpregs_mem.datasel, fpregs[6], 4);
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ADD_STRING ("\n\n FPUCW: ");
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ADD_MEM (fpregs[0], 8);
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ADD_STRING (" FPUSW: ");
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ADD_MEM (fpregs[1], 8);
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ADD_STRING (" TAG: ");
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ADD_MEM (fpregs[2], 8);
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ADD_STRING ("\n IPOFF: ");
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ADD_MEM (fpregs[3], 8);
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ADD_STRING (" CSSEL: ");
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ADD_MEM (fpregs[4], 4);
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ADD_STRING (" DATAOFF: ");
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ADD_MEM (fpregs[5], 8);
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ADD_STRING (" DATASEL: ");
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ADD_MEM (fpregs[6], 4);
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/* Now the real FPU registers. */
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hexvalue (ctx->__fpregs_mem._st[0].exponent, fpregs[7], 8);
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hexvalue (ctx->__fpregs_mem._st[0].significand[3] << 16
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| ctx->__fpregs_mem._st[0].significand[2], fpregs[8], 8);
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hexvalue (ctx->__fpregs_mem._st[0].significand[1] << 16
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| ctx->__fpregs_mem._st[0].significand[0], fpregs[9], 8);
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hexvalue (ctx->__fpregs_mem._st[1].exponent, fpregs[10], 8);
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hexvalue (ctx->__fpregs_mem._st[1].significand[3] << 16
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| ctx->__fpregs_mem._st[1].significand[2], fpregs[11], 8);
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hexvalue (ctx->__fpregs_mem._st[1].significand[1] << 16
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| ctx->__fpregs_mem._st[1].significand[0], fpregs[12], 8);
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hexvalue (ctx->__fpregs_mem._st[2].exponent, fpregs[13], 8);
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hexvalue (ctx->__fpregs_mem._st[2].significand[3] << 16
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| ctx->__fpregs_mem._st[2].significand[2], fpregs[14], 8);
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hexvalue (ctx->__fpregs_mem._st[2].significand[1] << 16
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| ctx->__fpregs_mem._st[2].significand[0], fpregs[15], 8);
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hexvalue (ctx->__fpregs_mem._st[3].exponent, fpregs[16], 8);
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hexvalue (ctx->__fpregs_mem._st[3].significand[3] << 16
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| ctx->__fpregs_mem._st[3].significand[2], fpregs[17], 8);
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hexvalue (ctx->__fpregs_mem._st[3].significand[1] << 16
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| ctx->__fpregs_mem._st[3].significand[0], fpregs[18], 8);
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hexvalue (ctx->__fpregs_mem._st[4].exponent, fpregs[19], 8);
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hexvalue (ctx->__fpregs_mem._st[4].significand[3] << 16
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| ctx->__fpregs_mem._st[4].significand[2], fpregs[20], 8);
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hexvalue (ctx->__fpregs_mem._st[4].significand[1] << 16
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| ctx->__fpregs_mem._st[4].significand[0], fpregs[21], 8);
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hexvalue (ctx->__fpregs_mem._st[5].exponent, fpregs[22], 8);
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hexvalue (ctx->__fpregs_mem._st[5].significand[3] << 16
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| ctx->__fpregs_mem._st[5].significand[2], fpregs[23], 8);
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hexvalue (ctx->__fpregs_mem._st[5].significand[1] << 16
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| ctx->__fpregs_mem._st[5].significand[0], fpregs[24], 8);
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hexvalue (ctx->__fpregs_mem._st[6].exponent, fpregs[25], 8);
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hexvalue (ctx->__fpregs_mem._st[6].significand[3] << 16
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| ctx->__fpregs_mem._st[6].significand[2], fpregs[26], 8);
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hexvalue (ctx->__fpregs_mem._st[6].significand[1] << 16
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| ctx->__fpregs_mem._st[6].significand[0], fpregs[27], 8);
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hexvalue (ctx->__fpregs_mem._st[7].exponent, fpregs[28], 8);
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hexvalue (ctx->__fpregs_mem._st[7].significand[3] << 16
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| ctx->__fpregs_mem._st[7].significand[2], fpregs[29], 8);
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hexvalue (ctx->__fpregs_mem._st[7].significand[1] << 16
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| ctx->__fpregs_mem._st[7].significand[0], fpregs[30], 8);
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ADD_STRING ("\n\n ST(0) ");
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ADD_MEM (fpregs[7], 4);
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ADD_STRING (" ");
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ADD_MEM (fpregs[8], 8);
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ADD_MEM (fpregs[9], 8);
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ADD_STRING (" ST(1) ");
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ADD_MEM (fpregs[10], 4);
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ADD_STRING (" ");
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ADD_MEM (fpregs[11], 8);
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ADD_MEM (fpregs[12], 8);
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ADD_STRING ("\n ST(2) ");
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ADD_MEM (fpregs[13], 4);
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ADD_STRING (" ");
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ADD_MEM (fpregs[14], 8);
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ADD_MEM (fpregs[15], 8);
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ADD_STRING (" ST(3) ");
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ADD_MEM (fpregs[16], 4);
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ADD_STRING (" ");
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ADD_MEM (fpregs[17], 8);
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ADD_MEM (fpregs[18], 8);
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ADD_STRING ("\n ST(4) ");
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ADD_MEM (fpregs[19], 4);
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ADD_STRING (" ");
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ADD_MEM (fpregs[20], 8);
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ADD_MEM (fpregs[21], 8);
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ADD_STRING (" ST(5) ");
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ADD_MEM (fpregs[22], 4);
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ADD_STRING (" ");
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ADD_MEM (fpregs[23], 8);
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ADD_MEM (fpregs[24], 8);
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ADD_STRING ("\n ST(6) ");
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ADD_MEM (fpregs[25], 4);
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ADD_STRING (" ");
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ADD_MEM (fpregs[26], 8);
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ADD_MEM (fpregs[27], 8);
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ADD_STRING (" ST(7) ");
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ADD_MEM (fpregs[28], 4);
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ADD_STRING (" ");
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ADD_MEM (fpregs[29], 8);
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ADD_MEM (fpregs[30], 8);
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ADD_STRING ("\n");
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/* Write the stuff out. */
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writev (fd, iov, nr);
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}
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#define REGISTER_DUMP register_dump (fd, ctx)
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