sysdeps/unix/sysv/linux/mips/register-dump.h

   1 /* Dump registers.
   2    Copyright (C) 2000-2015 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Andreas Jaeger <aj@suse.de>, 2000.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library.  If not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <sgidefs.h>
  21 #include <sys/uio.h>
  22 #include <_itoa.h>
  23
  24 #if _MIPS_SIM == _ABIO32
  25 # define CTX_TYPE       struct sigcontext *
  26 # define CTX_REG(ctx, i)        ((ctx)->sc_regs[(i)])
  27 # define CTX_PC(ctx)    ((ctx)->sc_pc)
  28 # define CTX_MDHI(ctx)  ((ctx)->sc_mdhi)
  29 # define CTX_MDLO(ctx)  ((ctx)->sc_mdlo)
  30 # define REG_HEX_SIZE   8
  31 #else
  32 # define CTX_TYPE       ucontext_t *
  33 # define CTX_REG(ctx, i)        ((ctx)->uc_mcontext.gregs[(i)])
  34 # define CTX_PC(ctx)    ((ctx)->uc_mcontext.pc)
  35 # define CTX_MDHI(ctx)  ((ctx)->uc_mcontext.mdhi)
  36 # define CTX_MDLO(ctx)  ((ctx)->uc_mcontext.mdhi)
  37 # define REG_HEX_SIZE   16
  38 #endif
  39
  40 /* We will print the register dump in this format:
  41
  42  R0   XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
  43  R8   XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
  44  R16  XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
  45  R24  XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX
  46             pc       lo       hi
  47       XXXXXXXX XXXXXXXX XXXXXXXX
  48  The FPU registers will not be printed.
  49 */
  50
  51 static void
  52 hexvalue (_ITOA_WORD_TYPE value, char *buf, size_t len)
  53 {
  54   char *cp = _itoa_word (value, buf + len, 16, 0);
  55   while (cp > buf)
  56     *--cp = '0';
  57 }
  58
  59 static void
  60 register_dump (int fd, CTX_TYPE ctx)
  61 {
  62   char regs[38][REG_HEX_SIZE];
  63   struct iovec iov[38 * 2 + 10];
  64   size_t nr = 0;
  65   int i;
  66
  67 #define ADD_STRING(str) \
  68   iov[nr].iov_base = (char *) str;                                            \
  69   iov[nr].iov_len = strlen (str);                                             \
  70   ++nr
  71 #define ADD_MEM(str, len) \
  72   iov[nr].iov_base = str;                                                     \
  73   iov[nr].iov_len = len;                                                      \
  74   ++nr
  75
  76   /* Generate strings of register contents.  */
  77   for (i = 0; i < 32; i++)
  78     hexvalue (CTX_REG (ctx, i), regs[i], REG_HEX_SIZE);
  79   hexvalue (CTX_PC (ctx), regs[32], REG_HEX_SIZE);
  80   hexvalue (CTX_MDHI (ctx), regs[33], REG_HEX_SIZE);
  81   hexvalue (CTX_MDLO (ctx), regs[34], REG_HEX_SIZE);
  82
  83   /* Generate the output.  */
  84   ADD_STRING ("Register dump:\n\n R0   ");
  85   for (i = 0; i < 8; i++)
  86     {
  87       ADD_MEM (regs[i], REG_HEX_SIZE);
  88       ADD_STRING (" ");
  89     }
  90   ADD_STRING ("\n R8   ");
  91   for (i = 8; i < 16; i++)
  92     {
  93       ADD_MEM (regs[i], REG_HEX_SIZE);
  94       ADD_STRING (" ");
  95     }
  96   ADD_STRING ("\n R16  ");
  97   for (i = 16; i < 24; i++)
  98     {
  99       ADD_MEM (regs[i], REG_HEX_SIZE);
 100       ADD_STRING (" ");
 101     }
 102   ADD_STRING ("\n R24  ");
 103   for (i = 24; i < 32; i++)
 104     {
 105       ADD_MEM (regs[i], REG_HEX_SIZE);
 106       ADD_STRING (" ");
 107     }
 108   ADD_STRING ("\n            pc       lo       hi\n      ");
 109   for (i = 32; i < 35; i++)
 110     {
 111       ADD_MEM (regs[i], REG_HEX_SIZE);
 112       ADD_STRING (" ");
 113     }
 114   ADD_STRING ("\n");
 115
 116   /* Write the stuff out.  */
 117   writev (fd, iov, nr);
 118 }
 119
 120
 121 #define REGISTER_DUMP register_dump (fd, ctx)