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/* Dump registers.
Copyright (C) 2004-2020 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 <string.h>
#include <ucontext.h>
#include <sys/uio.h>
#include <_itoa.h>
/* We will print the register dump in this format:
V0: XXXXXXXXXXXXXXXX T0: XXXXXXXXXXXXXXXX T1: XXXXXXXXXXXXXXXX
T2: XXXXXXXXXXXXXXXX T3: XXXXXXXXXXXXXXXX T4: XXXXXXXXXXXXXXXX
T5: XXXXXXXXXXXXXXXX T6: XXXXXXXXXXXXXXXX T7: XXXXXXXXXXXXXXXX
S0: XXXXXXXXXXXXXXXX S1: XXXXXXXXXXXXXXXX S2: XXXXXXXXXXXXXXXX
S3: XXXXXXXXXXXXXXXX S4: XXXXXXXXXXXXXXXX S5: XXXXXXXXXXXXXXXX
S6: XXXXXXXXXXXXXXXX A0: XXXXXXXXXXXXXXXX A1: XXXXXXXXXXXXXXXX
A2: XXXXXXXXXXXXXXXX A3: XXXXXXXXXXXXXXXX A4: XXXXXXXXXXXXXXXX
A5: XXXXXXXXXXXXXXXX T8: XXXXXXXXXXXXXXXX T9: XXXXXXXXXXXXXXXX
T10: XXXXXXXXXXXXXXXX T11: XXXXXXXXXXXXXXXX RA: XXXXXXXXXXXXXXXX
T12: XXXXXXXXXXXXXXXX AT: XXXXXXXXXXXXXXXX GP: XXXXXXXXXXXXXXXX
SP: XXXXXXXXXXXXXXXX PC: XXXXXXXXXXXXXXXX
FP0: XXXXXXXXXXXXXXXX FP1: XXXXXXXXXXXXXXXX FP2: XXXXXXXXXXXXXXXX
FP3: XXXXXXXXXXXXXXXX FP4: XXXXXXXXXXXXXXXX FP5: XXXXXXXXXXXXXXXX
FP6: XXXXXXXXXXXXXXXX FP7: XXXXXXXXXXXXXXXX FP8: XXXXXXXXXXXXXXXX
FP9: XXXXXXXXXXXXXXXX FP10: XXXXXXXXXXXXXXXX FP11: XXXXXXXXXXXXXXXX
FP12: XXXXXXXXXXXXXXXX FP13: XXXXXXXXXXXXXXXX FP14: XXXXXXXXXXXXXXXX
FP15: XXXXXXXXXXXXXXXX FP16: XXXXXXXXXXXXXXXX FP17: XXXXXXXXXXXXXXXX
FP18: XXXXXXXXXXXXXXXX FP19: XXXXXXXXXXXXXXXX FP20: XXXXXXXXXXXXXXXX
FP21: XXXXXXXXXXXXXXXX FP22: XXXXXXXXXXXXXXXX FP23: XXXXXXXXXXXXXXXX
FP24: XXXXXXXXXXXXXXXX FP25: XXXXXXXXXXXXXXXX FP26: XXXXXXXXXXXXXXXX
FP27: XXXXXXXXXXXXXXXX FP28: XXXXXXXXXXXXXXXX FP29: XXXXXXXXXXXXXXXX
FP30: XXXXXXXXXXXXXXXX FPCR: XXXXXXXXXXXXXXXX
TA0: XXXXXXXXXXXXXXXX TA1: XXXXXXXXXXXXXXXX TA2: 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)
{
struct iovec iov[31 * 2 + 2 /* REGS + PC. */
+ 31 * 2 + 2 /* FREGS + FPCR. */
+ (3 * 2) /* TA0, TA1, TA3. */
+ 1 /* '\n'. */];
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
char regs[31][16];
char pc[16];
for (int i = 0; i < 31; i++)
hexvalue (ctx->uc_mcontext.sc_regs[i], regs[i], 16);
hexvalue (ctx->uc_mcontext.sc_pc, pc, 16);
/* Generate the output. */
ADD_STRING ("Register dump:\n\n V0: ");
ADD_MEM (regs[0], 16);
ADD_STRING (" T0: ");
ADD_MEM (regs[1], 16);
ADD_STRING (" T1: ");
ADD_MEM (regs[2], 16);
ADD_STRING ("\n T2: ");
ADD_MEM (regs[3], 16);
ADD_STRING (" T3: ");
ADD_MEM (regs[4], 16);
ADD_STRING (" T4: ");
ADD_MEM (regs[5], 16);
ADD_STRING ("\n T5: ");
ADD_MEM (regs[6], 16);
ADD_STRING (" T6: ");
ADD_MEM (regs[7], 16);
ADD_STRING (" T7: ");
ADD_MEM (regs[8], 16);
ADD_STRING ("\n S0: ");
ADD_MEM (regs[9], 16);
ADD_STRING (" S1: ");
ADD_MEM (regs[10], 16);
ADD_STRING (" S2: ");
ADD_MEM (regs[11], 16);
ADD_STRING ("\n S3: ");
ADD_MEM (regs[12], 16);
ADD_STRING (" S4: ");
ADD_MEM (regs[13], 16);
ADD_STRING (" S5: ");
ADD_MEM (regs[14], 16);
ADD_STRING ("\n S6: ");
ADD_MEM (regs[15], 16);
ADD_STRING (" A0: ");
ADD_MEM (regs[16], 16);
ADD_STRING (" A1: ");
ADD_MEM (regs[17], 16);
ADD_STRING ("\n A2: ");
ADD_MEM (regs[18], 16);
ADD_STRING (" A3: ");
ADD_MEM (regs[19], 16);
ADD_STRING (" A4: ");
ADD_MEM (regs[20], 16);
ADD_STRING ("\n A5: ");
ADD_MEM (regs[21], 16);
ADD_STRING (" T8: ");
ADD_MEM (regs[22], 16);
ADD_STRING (" T9: ");
ADD_MEM (regs[23], 16);
ADD_STRING ("\n T10: ");
ADD_MEM (regs[24], 16);
ADD_STRING (" T11: ");
ADD_MEM (regs[25], 16);
ADD_STRING (" RA: ");
ADD_MEM (regs[26], 16);
ADD_STRING ("\n T12: ");
ADD_MEM (regs[27], 16);
ADD_STRING (" AT: ");
ADD_MEM (regs[28], 16);
ADD_STRING (" GP: ");
ADD_MEM (regs[29], 16);
ADD_STRING ("\n SP: ");
ADD_MEM (regs[30], 16);
ADD_STRING (" PC: ");
ADD_MEM (pc, 16);
char fpregs[31][16];
char fpcr[16];
for (int i = 0; i < 31; i++)
hexvalue (ctx->uc_mcontext.sc_fpregs[i], fpregs[i], 16);
hexvalue (ctx->uc_mcontext.sc_fpcr, fpcr, 16);
ADD_STRING ("\n\n FP0: ");
ADD_MEM (fpregs[0], 16);
ADD_STRING (" FP1: ");
ADD_MEM (fpregs[1], 16);
ADD_STRING (" FP2: ");
ADD_MEM (fpregs[2], 16);
ADD_STRING ("\n FP3: ");
ADD_MEM (fpregs[3], 16);
ADD_STRING (" FP4: ");
ADD_MEM (fpregs[4], 16);
ADD_STRING (" FP5: ");
ADD_MEM (fpregs[5], 16);
ADD_STRING ("\n FP6: ");
ADD_MEM (fpregs[6], 16);
ADD_STRING (" FP7: ");
ADD_MEM (fpregs[7], 16);
ADD_STRING (" FP8: ");
ADD_MEM (fpregs[8], 16);
ADD_STRING ("\n FP9: ");
ADD_MEM (fpregs[9], 16);
ADD_STRING (" FP10: ");
ADD_MEM (fpregs[10], 16);
ADD_STRING (" FP11: ");
ADD_MEM (fpregs[11], 16);
ADD_STRING ("\n FP12: ");
ADD_MEM (fpregs[12], 16);
ADD_STRING (" FP13: ");
ADD_MEM (fpregs[13], 16);
ADD_STRING (" FP14: ");
ADD_MEM (fpregs[14], 16);
ADD_STRING ("\n FP15: ");
ADD_MEM (fpregs[15], 16);
ADD_STRING (" FP16: ");
ADD_MEM (fpregs[16], 16);
ADD_STRING (" FP17: ");
ADD_MEM (fpregs[17], 16);
ADD_STRING ("\n FP18: ");
ADD_MEM (fpregs[18], 16);
ADD_STRING (" FP19: ");
ADD_MEM (fpregs[19], 16);
ADD_STRING (" FP20: ");
ADD_MEM (fpregs[20], 16);
ADD_STRING ("\n FP21: ");
ADD_MEM (fpregs[21], 16);
ADD_STRING (" FP22: ");
ADD_MEM (fpregs[22], 16);
ADD_STRING (" FP23: ");
ADD_MEM (fpregs[23], 16);
ADD_STRING ("\n FP24: ");
ADD_MEM (fpregs[24], 16);
ADD_STRING (" FP25: ");
ADD_MEM (fpregs[25], 16);
ADD_STRING (" FP26: ");
ADD_MEM (fpregs[26], 16);
ADD_STRING ("\n FP27: ");
ADD_MEM (fpregs[27], 16);
ADD_STRING (" FP28: ");
ADD_MEM (fpregs[28], 16);
ADD_STRING (" FP29: ");
ADD_MEM (fpregs[29], 16);
ADD_STRING ("\n FP30: ");
ADD_MEM (fpregs[30], 16);
ADD_STRING (" FPCR: ");
ADD_MEM (fpcr, 16);
char traparg[3][16];
hexvalue (ctx->uc_mcontext.sc_traparg_a0, traparg[0], 16);
hexvalue (ctx->uc_mcontext.sc_traparg_a1, traparg[1], 16);
hexvalue (ctx->uc_mcontext.sc_traparg_a2, traparg[2], 16);
ADD_STRING ("\n\n TA0: ");
ADD_MEM (traparg[0], 16);
ADD_STRING (" TA1: ");
ADD_MEM (traparg[1], 16);
ADD_STRING (" TA2: ");
ADD_MEM (traparg[2], 16);
ADD_STRING ("\n");
/* Write the stuff out. */
writev (fd, iov, nr);
}
#define REGISTER_DUMP register_dump (fd, ctx)
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