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30891f35fa7da832b66d80d0807610df361851f3
glibc/sysdeps/unix/sysv/linux/i386/register-dump.h
Siddhesh Poyarekar 30891f35fa Remove "Contributed by" lines 
We stopped adding "Contributed by" or similar lines in sources in 2012
in favour of git logs and keeping the Contributors section of the
glibc manual up to date.  Removing these lines makes the license
header a bit more consistent across files and also removes the
possibility of error in attribution when license blocks or files are
copied across since the contributed-by lines don't actually reflect
reality in those cases.

Move all "Contributed by" and similar lines (Written by, Test by,
etc.) into a new file CONTRIBUTED-BY to retain record of these
contributions.  These contributors are also mentioned in
manual/contrib.texi, so we just maintain this additional record as a
courtesy to the earlier developers.

The following scripts were used to filter a list of files to edit in
place and to clean up the CONTRIBUTED-BY file respectively.  These
were not added to the glibc sources because they're not expected to be
of any use in future given that this is a one time task:

https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc
https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2021-09-03 22:06:44 +05:30

251 lines
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/* Dump registers.
Copyright (C) 1998-2021 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
<https://www.gnu.org/licenses/>. */
#include <sys/uio.h>
#include <_itoa.h>
/* We will print the register dump in this format:
EAX: XXXXXXXX EBX: XXXXXXXX ECX: XXXXXXXX EDX: XXXXXXXX
ESI: XXXXXXXX EDI: XXXXXXXX EBP: XXXXXXXX ESP: XXXXXXXX
EIP: XXXXXXXX EFLAGS: XXXXXXXX
CS: XXXX DS: XXXX ES: XXXX FS: XXXX GS: XXXX SS: XXXX
Trap: XXXXXXXX Error: XXXXXXXX OldMask: XXXXXXXX
ESP/SIGNAL: XXXXXXXX CR2: XXXXXXXX
FPUCW: XXXXXXXX FPUSW: XXXXXXXX TAG: XXXXXXXX
IPOFF: XXXXXXXX CSSEL: XXXX DATAOFF: XXXXXXXX DATASEL: XXXX
ST(0) XXXX XXXXXXXXXXXXXXXX ST(1) XXXX XXXXXXXXXXXXXXXX
ST(2) XXXX XXXXXXXXXXXXXXXX ST(3) XXXX XXXXXXXXXXXXXXXX
ST(4) XXXX XXXXXXXXXXXXXXXX ST(5) XXXX XXXXXXXXXXXXXXXX
ST(6) XXXX XXXXXXXXXXXXXXXX ST(7) XXXX 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';
}
static void
register_dump (int fd, struct ucontext_t *ctx)
{
char regs[21][8];
char fpregs[31][8];
struct iovec iov[97];
size_t nr = 0;
#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 (ctx->uc_mcontext.gregs[REG_EAX], regs[0], 8);
hexvalue (ctx->uc_mcontext.gregs[REG_EBX], regs[1], 8);
hexvalue (ctx->uc_mcontext.gregs[REG_ECX], regs[2], 8);
hexvalue (ctx->uc_mcontext.gregs[REG_EDX], regs[3], 8);
hexvalue (ctx->uc_mcontext.gregs[REG_ESI], regs[4], 8);
hexvalue (ctx->uc_mcontext.gregs[REG_EDI], regs[5], 8);
hexvalue (ctx->uc_mcontext.gregs[REG_EBP], regs[6], 8);
hexvalue (ctx->uc_mcontext.gregs[REG_ESP], regs[7], 8);
hexvalue (ctx->uc_mcontext.gregs[REG_EIP], regs[8], 8);
hexvalue (ctx->uc_flags, regs[9], 8);
hexvalue (ctx->uc_mcontext.gregs[REG_CS], regs[10], 4);
hexvalue (ctx->uc_mcontext.gregs[REG_DS], regs[11], 4);
hexvalue (ctx->uc_mcontext.gregs[REG_ES], regs[12], 4);
hexvalue (ctx->uc_mcontext.gregs[REG_FS], regs[13], 4);
hexvalue (ctx->uc_mcontext.gregs[REG_GS], regs[14], 4);
hexvalue (ctx->uc_mcontext.gregs[REG_SS], regs[15], 4);
hexvalue (ctx->uc_mcontext.gregs[REG_TRAPNO], regs[16], 8);
hexvalue (ctx->uc_mcontext.gregs[REG_ERR], regs[17], 8);
hexvalue (ctx->uc_mcontext.oldmask, regs[18], 8);
hexvalue (ctx->uc_mcontext.gregs[REG_UESP], regs[19], 8);
hexvalue (ctx->uc_mcontext.cr2, regs[20], 8);
/* Generate the output. */
ADD_STRING ("Register dump:\n\n EAX: ");
ADD_MEM (regs[0], 8);
ADD_STRING (" EBX: ");
ADD_MEM (regs[1], 8);
ADD_STRING (" ECX: ");
ADD_MEM (regs[2], 8);
ADD_STRING (" EDX: ");
ADD_MEM (regs[3], 8);
ADD_STRING ("\n ESI: ");
ADD_MEM (regs[4], 8);
ADD_STRING (" EDI: ");
ADD_MEM (regs[5], 8);
ADD_STRING (" EBP: ");
ADD_MEM (regs[6], 8);
ADD_STRING (" ESP: ");
ADD_MEM (regs[7], 8);
ADD_STRING ("\n\n EIP: ");
ADD_MEM (regs[8], 8);
ADD_STRING (" EFLAGS: ");
ADD_MEM (regs[9], 8);
ADD_STRING ("\n\n CS: ");
ADD_MEM (regs[10], 4);
ADD_STRING (" DS: ");
ADD_MEM (regs[11], 4);
ADD_STRING (" ES: ");
ADD_MEM (regs[12], 4);
ADD_STRING (" FS: ");
ADD_MEM (regs[13], 4);
ADD_STRING (" GS: ");
ADD_MEM (regs[14], 4);
ADD_STRING (" SS: ");
ADD_MEM (regs[15], 4);
ADD_STRING ("\n\n Trap: ");
ADD_MEM (regs[16], 8);
ADD_STRING (" Error: ");
ADD_MEM (regs[17], 8);
ADD_STRING (" OldMask: ");
ADD_MEM (regs[18], 8);
ADD_STRING ("\n ESP/signal: ");
ADD_MEM (regs[19], 8);
ADD_STRING (" CR2: ");
ADD_MEM (regs[20], 8);
/* Generate output for the FPU control/status registers. */
hexvalue (ctx->__fpregs_mem.cw, fpregs[0], 8);
hexvalue (ctx->__fpregs_mem.sw, fpregs[1], 8);
hexvalue (ctx->__fpregs_mem.tag, fpregs[2], 8);
hexvalue (ctx->__fpregs_mem.ipoff, fpregs[3], 8);
hexvalue (ctx->__fpregs_mem.cssel, fpregs[4], 4);
hexvalue (ctx->__fpregs_mem.dataoff, fpregs[5], 8);
hexvalue (ctx->__fpregs_mem.datasel, fpregs[6], 4);
ADD_STRING ("\n\n FPUCW: ");
ADD_MEM (fpregs[0], 8);
ADD_STRING (" FPUSW: ");
ADD_MEM (fpregs[1], 8);
ADD_STRING (" TAG: ");
ADD_MEM (fpregs[2], 8);
ADD_STRING ("\n IPOFF: ");
ADD_MEM (fpregs[3], 8);
ADD_STRING (" CSSEL: ");
ADD_MEM (fpregs[4], 4);
ADD_STRING (" DATAOFF: ");
ADD_MEM (fpregs[5], 8);
ADD_STRING (" DATASEL: ");
ADD_MEM (fpregs[6], 4);
/* Now the real FPU registers. */
hexvalue (ctx->__fpregs_mem._st[0].exponent, fpregs[7], 8);
hexvalue (ctx->__fpregs_mem._st[0].significand[3] << 16
| ctx->__fpregs_mem._st[0].significand[2], fpregs[8], 8);
hexvalue (ctx->__fpregs_mem._st[0].significand[1] << 16
| ctx->__fpregs_mem._st[0].significand[0], fpregs[9], 8);
hexvalue (ctx->__fpregs_mem._st[1].exponent, fpregs[10], 8);
hexvalue (ctx->__fpregs_mem._st[1].significand[3] << 16
| ctx->__fpregs_mem._st[1].significand[2], fpregs[11], 8);
hexvalue (ctx->__fpregs_mem._st[1].significand[1] << 16
| ctx->__fpregs_mem._st[1].significand[0], fpregs[12], 8);
hexvalue (ctx->__fpregs_mem._st[2].exponent, fpregs[13], 8);
hexvalue (ctx->__fpregs_mem._st[2].significand[3] << 16
| ctx->__fpregs_mem._st[2].significand[2], fpregs[14], 8);
hexvalue (ctx->__fpregs_mem._st[2].significand[1] << 16
| ctx->__fpregs_mem._st[2].significand[0], fpregs[15], 8);
hexvalue (ctx->__fpregs_mem._st[3].exponent, fpregs[16], 8);
hexvalue (ctx->__fpregs_mem._st[3].significand[3] << 16
| ctx->__fpregs_mem._st[3].significand[2], fpregs[17], 8);
hexvalue (ctx->__fpregs_mem._st[3].significand[1] << 16
| ctx->__fpregs_mem._st[3].significand[0], fpregs[18], 8);
hexvalue (ctx->__fpregs_mem._st[4].exponent, fpregs[19], 8);
hexvalue (ctx->__fpregs_mem._st[4].significand[3] << 16
| ctx->__fpregs_mem._st[4].significand[2], fpregs[20], 8);
hexvalue (ctx->__fpregs_mem._st[4].significand[1] << 16
| ctx->__fpregs_mem._st[4].significand[0], fpregs[21], 8);
hexvalue (ctx->__fpregs_mem._st[5].exponent, fpregs[22], 8);
hexvalue (ctx->__fpregs_mem._st[5].significand[3] << 16
| ctx->__fpregs_mem._st[5].significand[2], fpregs[23], 8);
hexvalue (ctx->__fpregs_mem._st[5].significand[1] << 16
| ctx->__fpregs_mem._st[5].significand[0], fpregs[24], 8);
hexvalue (ctx->__fpregs_mem._st[6].exponent, fpregs[25], 8);
hexvalue (ctx->__fpregs_mem._st[6].significand[3] << 16
| ctx->__fpregs_mem._st[6].significand[2], fpregs[26], 8);
hexvalue (ctx->__fpregs_mem._st[6].significand[1] << 16
| ctx->__fpregs_mem._st[6].significand[0], fpregs[27], 8);
hexvalue (ctx->__fpregs_mem._st[7].exponent, fpregs[28], 8);
hexvalue (ctx->__fpregs_mem._st[7].significand[3] << 16
| ctx->__fpregs_mem._st[7].significand[2], fpregs[29], 8);
hexvalue (ctx->__fpregs_mem._st[7].significand[1] << 16
| ctx->__fpregs_mem._st[7].significand[0], fpregs[30], 8);
ADD_STRING ("\n\n ST(0) ");
ADD_MEM (fpregs[7], 4);
ADD_STRING (" ");
ADD_MEM (fpregs[8], 8);
ADD_MEM (fpregs[9], 8);
ADD_STRING (" ST(1) ");
ADD_MEM (fpregs[10], 4);
ADD_STRING (" ");
ADD_MEM (fpregs[11], 8);
ADD_MEM (fpregs[12], 8);
ADD_STRING ("\n ST(2) ");
ADD_MEM (fpregs[13], 4);
ADD_STRING (" ");
ADD_MEM (fpregs[14], 8);
ADD_MEM (fpregs[15], 8);
ADD_STRING (" ST(3) ");
ADD_MEM (fpregs[16], 4);
ADD_STRING (" ");
ADD_MEM (fpregs[17], 8);
ADD_MEM (fpregs[18], 8);
ADD_STRING ("\n ST(4) ");
ADD_MEM (fpregs[19], 4);
ADD_STRING (" ");
ADD_MEM (fpregs[20], 8);
ADD_MEM (fpregs[21], 8);
ADD_STRING (" ST(5) ");
ADD_MEM (fpregs[22], 4);
ADD_STRING (" ");
ADD_MEM (fpregs[23], 8);
ADD_MEM (fpregs[24], 8);
ADD_STRING ("\n ST(6) ");
ADD_MEM (fpregs[25], 4);
ADD_STRING (" ");
ADD_MEM (fpregs[26], 8);
ADD_MEM (fpregs[27], 8);
ADD_STRING (" ST(7) ");
ADD_MEM (fpregs[28], 4);
ADD_STRING (" ");
ADD_MEM (fpregs[29], 8);
ADD_MEM (fpregs[30], 8);
ADD_STRING ("\n");
/* Write the stuff out. */
writev (fd, iov, nr);
}
#define REGISTER_DUMP register_dump (fd, ctx)
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