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/* Dump registers.
Copyright (C) 2001-2021 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:
RAX: XXXXXXXXXXXXXXXX RBX: XXXXXXXXXXXXXXXX RCX: XXXXXXXXXXXXXXXX
RDX: XXXXXXXXXXXXXXXX RSI: XXXXXXXXXXXXXXXX RDI: XXXXXXXXXXXXXXXX
RBP: XXXXXXXXXXXXXXXX R8 : XXXXXXXXXXXXXXXX R9 : XXXXXXXXXXXXXXXX
R10: XXXXXXXXXXXXXXXX R11: XXXXXXXXXXXXXXXX R12: XXXXXXXXXXXXXXXX
R13: XXXXXXXXXXXXXXXX R14: XXXXXXXXXXXXXXXX R15: XXXXXXXXXXXXXXXX
RSP: XXXXXXXXXXXXXXXX
RIP: XXXXXXXXXXXXXXXX EFLAGS: XXXXXXXX
CS: XXXX DS: XXXX ES: XXXX FS: XXXX GS: XXXX
Trap: XXXXXXXX Error: XXXXXXXX OldMask: XXXXXXXX
RSP/SIGNAL: XXXXXXXXXXXXXXXX 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
mxcsr: XXXX
XMM0 : XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XMM1 : XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XMM2 : XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XMM3 : XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XMM4 : XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XMM5 : XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XMM6 : XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XMM7 : XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XMM8 : XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XMM9 : XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XMM10: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XMM11: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XMM12: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XMM13: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XMM14: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XMM15: 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
register_dump (int fd, ucontext_t *ctx)
{
char regs[25][16];
char fpregs[30][8];
char xmmregs[16][32];
struct iovec iov[147];
size_t nr = 0;
int i;
#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_RAX], regs[0], 16);
hexvalue (ctx->uc_mcontext.gregs[REG_RBX], regs[1], 16);
hexvalue (ctx->uc_mcontext.gregs[REG_RCX], regs[2], 16);
hexvalue (ctx->uc_mcontext.gregs[REG_RDX], regs[3], 16);
hexvalue (ctx->uc_mcontext.gregs[REG_RSI], regs[4], 16);
hexvalue (ctx->uc_mcontext.gregs[REG_RDI], regs[5], 16);
hexvalue (ctx->uc_mcontext.gregs[REG_RBP], regs[6], 16);
hexvalue (ctx->uc_mcontext.gregs[REG_R8], regs[7], 16);
hexvalue (ctx->uc_mcontext.gregs[REG_R9], regs[8], 16);
hexvalue (ctx->uc_mcontext.gregs[REG_R10], regs[9], 16);
hexvalue (ctx->uc_mcontext.gregs[REG_R11], regs[10], 16);
hexvalue (ctx->uc_mcontext.gregs[REG_R12], regs[11], 16);
hexvalue (ctx->uc_mcontext.gregs[REG_R13], regs[12], 16);
hexvalue (ctx->uc_mcontext.gregs[REG_R14], regs[13], 16);
hexvalue (ctx->uc_mcontext.gregs[REG_R15], regs[14], 16);
hexvalue (ctx->uc_mcontext.gregs[REG_RSP], regs[15], 16);
hexvalue (ctx->uc_mcontext.gregs[REG_RIP], regs[16], 16);
hexvalue (ctx->uc_mcontext.gregs[REG_EFL], regs[17], 8);
hexvalue (ctx->uc_mcontext.gregs[REG_CSGSFS] & 0xffff, regs[18], 4);
hexvalue ((ctx->uc_mcontext.gregs[REG_CSGSFS] >> 16) & 0xffff, regs[19], 4);
hexvalue ((ctx->uc_mcontext.gregs[REG_CSGSFS] >> 32) & 0xffff, regs[20], 4);
/* hexvalue (ctx->ss, regs[23], 4); */
hexvalue (ctx->uc_mcontext.gregs[REG_TRAPNO], regs[21], 8);
hexvalue (ctx->uc_mcontext.gregs[REG_ERR], regs[22], 8);
hexvalue (ctx->uc_mcontext.gregs[REG_OLDMASK], regs[23], 8);
hexvalue (ctx->uc_mcontext.gregs[REG_CR2], regs[24], 8);
/* Generate the output. */
ADD_STRING ("Register dump:\n\n RAX: ");
ADD_MEM (regs[0], 16);
ADD_STRING (" RBX: ");
ADD_MEM (regs[1], 16);
ADD_STRING (" RCX: ");
ADD_MEM (regs[2], 16);
ADD_STRING ("\n RDX: ");
ADD_MEM (regs[3], 16);
ADD_STRING (" RSI: ");
ADD_MEM (regs[4], 16);
ADD_STRING (" RDI: ");
ADD_MEM (regs[5], 16);
ADD_STRING ("\n RBP: ");
ADD_MEM (regs[6], 16);
ADD_STRING (" R8 : ");
ADD_MEM (regs[7], 16);
ADD_STRING (" R9 : ");
ADD_MEM (regs[8], 16);
ADD_STRING ("\n R10: ");
ADD_MEM (regs[9], 16);
ADD_STRING (" R11: ");
ADD_MEM (regs[10], 16);
ADD_STRING (" R12: ");
ADD_MEM (regs[11], 16);
ADD_STRING ("\n R13: ");
ADD_MEM (regs[12], 16);
ADD_STRING (" R14: ");
ADD_MEM (regs[13], 16);
ADD_STRING (" R15: ");
ADD_MEM (regs[14], 16);
ADD_STRING ("\n RSP: ");
ADD_MEM (regs[15], 16);
ADD_STRING ("\n\n RIP: ");
ADD_MEM (regs[16], 16);
ADD_STRING (" EFLAGS: ");
ADD_MEM (regs[17], 8);
ADD_STRING ("\n\n CS: ");
ADD_MEM (regs[18], 4);
ADD_STRING (" FS: ");
ADD_MEM (regs[19], 4);
ADD_STRING (" GS: ");
ADD_MEM (regs[20], 4);
/*
ADD_STRING (" SS: ");
ADD_MEM (regs[23], 4);
*/
ADD_STRING ("\n\n Trap: ");
ADD_MEM (regs[21], 8);
ADD_STRING (" Error: ");
ADD_MEM (regs[22], 8);
ADD_STRING (" OldMask: ");
ADD_MEM (regs[23], 8);
ADD_STRING (" CR2: ");
ADD_MEM (regs[24], 8);
if (ctx->uc_mcontext.fpregs != NULL)
{
/* Generate output for the FPU control/status registers. */
hexvalue (ctx->uc_mcontext.fpregs->cwd, fpregs[0], 8);
hexvalue (ctx->uc_mcontext.fpregs->swd, fpregs[1], 8);
hexvalue (ctx->uc_mcontext.fpregs->ftw, fpregs[2], 8);
hexvalue (ctx->uc_mcontext.fpregs->rip, fpregs[3], 8);
hexvalue (ctx->uc_mcontext.fpregs->rdp, fpregs[4], 8);
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 RIP: ");
ADD_MEM (fpregs[3], 8);
ADD_STRING (" RDP: ");
ADD_MEM (fpregs[4], 8);
/* Now the real FPU registers. */
hexvalue (ctx->uc_mcontext.fpregs->_st[0].exponent, fpregs[5], 8);
hexvalue (ctx->uc_mcontext.fpregs->_st[0].significand[3] << 16
| ctx->uc_mcontext.fpregs->_st[0].significand[2], fpregs[6],
8);
hexvalue (ctx->uc_mcontext.fpregs->_st[0].significand[1] << 16
| ctx->uc_mcontext.fpregs->_st[0].significand[0], fpregs[7],
8);
hexvalue (ctx->uc_mcontext.fpregs->_st[1].exponent, fpregs[8], 8);
hexvalue (ctx->uc_mcontext.fpregs->_st[1].significand[3] << 16
| ctx->uc_mcontext.fpregs->_st[1].significand[2], fpregs[9],
8);
hexvalue (ctx->uc_mcontext.fpregs->_st[1].significand[1] << 16
| ctx->uc_mcontext.fpregs->_st[1].significand[0], fpregs[10],
8);
hexvalue (ctx->uc_mcontext.fpregs->_st[2].exponent, fpregs[11], 8);
hexvalue (ctx->uc_mcontext.fpregs->_st[2].significand[3] << 16
| ctx->uc_mcontext.fpregs->_st[2].significand[2], fpregs[12],
8);
hexvalue (ctx->uc_mcontext.fpregs->_st[2].significand[1] << 16
| ctx->uc_mcontext.fpregs->_st[2].significand[0], fpregs[13],
8);
hexvalue (ctx->uc_mcontext.fpregs->_st[3].exponent, fpregs[14], 8);
hexvalue (ctx->uc_mcontext.fpregs->_st[3].significand[3] << 16
| ctx->uc_mcontext.fpregs->_st[3].significand[2], fpregs[15],
8);
hexvalue (ctx->uc_mcontext.fpregs->_st[3].significand[1] << 16
| ctx->uc_mcontext.fpregs->_st[3].significand[0], fpregs[16],
8);
hexvalue (ctx->uc_mcontext.fpregs->_st[4].exponent, fpregs[17], 8);
hexvalue (ctx->uc_mcontext.fpregs->_st[4].significand[3] << 16
| ctx->uc_mcontext.fpregs->_st[4].significand[2], fpregs[18],
8);
hexvalue (ctx->uc_mcontext.fpregs->_st[4].significand[1] << 16
| ctx->uc_mcontext.fpregs->_st[4].significand[0], fpregs[19],
8);
hexvalue (ctx->uc_mcontext.fpregs->_st[5].exponent, fpregs[20], 8);
hexvalue (ctx->uc_mcontext.fpregs->_st[5].significand[3] << 16
| ctx->uc_mcontext.fpregs->_st[5].significand[2], fpregs[21],
8);
hexvalue (ctx->uc_mcontext.fpregs->_st[5].significand[1] << 16
| ctx->uc_mcontext.fpregs->_st[5].significand[0], fpregs[22],
8);
hexvalue (ctx->uc_mcontext.fpregs->_st[6].exponent, fpregs[23], 8);
hexvalue (ctx->uc_mcontext.fpregs->_st[6].significand[3] << 16
| ctx->uc_mcontext.fpregs->_st[6].significand[2], fpregs[24],
8);
hexvalue (ctx->uc_mcontext.fpregs->_st[6].significand[1] << 16
| ctx->uc_mcontext.fpregs->_st[6].significand[0], fpregs[25],
8);
hexvalue (ctx->uc_mcontext.fpregs->_st[7].exponent, fpregs[26], 8);
hexvalue (ctx->uc_mcontext.fpregs->_st[7].significand[3] << 16
| ctx->uc_mcontext.fpregs->_st[7].significand[2], fpregs[27],
8);
hexvalue (ctx->uc_mcontext.fpregs->_st[7].significand[1] << 16
| ctx->uc_mcontext.fpregs->_st[7].significand[0], fpregs[28],
8);
hexvalue (ctx->uc_mcontext.fpregs->mxcsr, fpregs[29], 4);
for (i = 0; i < 16; i++)
hexvalue (ctx->uc_mcontext.fpregs->_xmm[i].element[3] << 24
| ctx->uc_mcontext.fpregs->_xmm[i].element[2] << 16
| ctx->uc_mcontext.fpregs->_xmm[i].element[1] << 8
| ctx->uc_mcontext.fpregs->_xmm[i].element[0], xmmregs[i],
32);
ADD_STRING ("\n\n ST(0) ");
ADD_MEM (fpregs[5], 4);
ADD_STRING (" ");
ADD_MEM (fpregs[6], 8);
ADD_MEM (fpregs[7], 8);
ADD_STRING (" ST(1) ");
ADD_MEM (fpregs[8], 4);
ADD_STRING (" ");
ADD_MEM (fpregs[9], 8);
ADD_MEM (fpregs[10], 8);
ADD_STRING ("\n ST(2) ");
ADD_MEM (fpregs[11], 4);
ADD_STRING (" ");
ADD_MEM (fpregs[12], 8);
ADD_MEM (fpregs[13], 8);
ADD_STRING (" ST(3) ");
ADD_MEM (fpregs[14], 4);
ADD_STRING (" ");
ADD_MEM (fpregs[15], 8);
ADD_MEM (fpregs[16], 8);
ADD_STRING ("\n ST(4) ");
ADD_MEM (fpregs[17], 4);
ADD_STRING (" ");
ADD_MEM (fpregs[18], 8);
ADD_MEM (fpregs[19], 8);
ADD_STRING (" ST(5) ");
ADD_MEM (fpregs[20], 4);
ADD_STRING (" ");
ADD_MEM (fpregs[21], 8);
ADD_MEM (fpregs[22], 8);
ADD_STRING ("\n ST(6) ");
ADD_MEM (fpregs[23], 4);
ADD_STRING (" ");
ADD_MEM (fpregs[24], 8);
ADD_MEM (fpregs[25], 8);
ADD_STRING (" ST(7) ");
ADD_MEM (fpregs[27], 4);
ADD_STRING (" ");
ADD_MEM (fpregs[27], 8);
ADD_MEM (fpregs[28], 8);
ADD_STRING ("\n mxcsr: ");
ADD_MEM (fpregs[29], 4);
ADD_STRING ("\n XMM0: ");
ADD_MEM (xmmregs[0], 32);
ADD_STRING (" XMM1: ");
ADD_MEM (xmmregs[0], 32);
ADD_STRING ("\n XMM2: ");
ADD_MEM (xmmregs[0], 32);
ADD_STRING (" XMM3: ");
ADD_MEM (xmmregs[0], 32);
ADD_STRING ("\n XMM4: ");
ADD_MEM (xmmregs[0], 32);
ADD_STRING (" XMM5: ");
ADD_MEM (xmmregs[0], 32);
ADD_STRING ("\n XMM6: ");
ADD_MEM (xmmregs[0], 32);
ADD_STRING (" XMM7: ");
ADD_MEM (xmmregs[0], 32);
ADD_STRING ("\n XMM8: ");
ADD_MEM (xmmregs[0], 32);
ADD_STRING (" XMM9: ");
ADD_MEM (xmmregs[0], 32);
ADD_STRING ("\n XMM10: ");
ADD_MEM (xmmregs[0], 32);
ADD_STRING (" XMM11: ");
ADD_MEM (xmmregs[0], 32);
ADD_STRING ("\n XMM12: ");
ADD_MEM (xmmregs[0], 32);
ADD_STRING (" XMM13: ");
ADD_MEM (xmmregs[0], 32);
ADD_STRING ("\n XMM14: ");
ADD_MEM (xmmregs[0], 32);
ADD_STRING (" XMM15: ");
ADD_MEM (xmmregs[0], 32);
}
ADD_STRING ("\n");
/* Write the stuff out. */
writev (fd, iov, nr);
}
#define REGISTER_DUMP register_dump (fd, ctx)
|
