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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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