sysdeps/unix/sysv/linux/ia64/register-dump.h

   1 /* Dump registers.
   2    Copyright (C) 2004-2021 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <string.h>
  20 #include <sys/uio.h>
  21 #include <_itoa.h>
  22
  23 /* We will print the register dump in this format:
  24
  25  GP:   XXXXXXXXXXXXXXXX R2:   XXXXXXXXXXXXXXXX R3:   XXXXXXXXXXXXXXXX
  26  R8:   XXXXXXXXXXXXXXXX R9:   XXXXXXXXXXXXXXXX R10:  XXXXXXXXXXXXXXXX
  27  R11:  XXXXXXXXXXXXXXXX SP:   XXXXXXXXXXXXXXXX TP:   XXXXXXXXXXXXXXXX
  28  R14:  XXXXXXXXXXXXXXXX R15:  XXXXXXXXXXXXXXXX R16:  XXXXXXXXXXXXXXXX
  29  R17:  XXXXXXXXXXXXXXXX R18:  XXXXXXXXXXXXXXXX R19:  XXXXXXXXXXXXXXXX
  30  R20:  XXXXXXXXXXXXXXXX R21:  XXXXXXXXXXXXXXXX R22:  XXXXXXXXXXXXXXXX
  31  R23:  XXXXXXXXXXXXXXXX R24:  XXXXXXXXXXXXXXXX R25:  XXXXXXXXXXXXXXXX
  32  R26:  XXXXXXXXXXXXXXXX R27:  XXXXXXXXXXXXXXXX R28:  XXXXXXXXXXXXXXXX
  33  R29:  XXXXXXXXXXXXXXXX R30:  XXXXXXXXXXXXXXXX R31:  XXXXXXXXXXXXXXXX
  34
  35  RP:   XXXXXXXXXXXXXXXX B6:   XXXXXXXXXXXXXXXX B7:   XXXXXXXXXXXXXXXX
  36
  37  IP:   XXXXXXXXXXXXXXXX RSC:  XXXXXXXXXXXXXXXX PR:   XXXXXXXXXXXXXXXX
  38  PFS:  XXXXXXXXXXXXXXXX UNAT: XXXXXXXXXXXXXXXX CFM:  XXXXXXXXXXXXXXXX
  39  CCV:  XXXXXXXXXXXXXXXX FPSR: XXXXXXXXXXXXXXXX
  40
  41  F32:  XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX F33:  XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
  42  F34:  XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX F35:  XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
  43 ...
  44  F124: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX F125: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
  45  F126: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX F127: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
  46  */
  47
  48 static void
  49 hexvalue (unsigned long int value, char *buf, size_t len)
  50 {
  51   char *cp = _itoa_word (value, buf + len, 16, 0);
  52   while (cp > buf)
  53     *--cp = '0';
  54 }
  55
  56 static void
  57 regvalue (unsigned long int *value, char letter, int regno, char *buf)
  58 {
  59   int n = regno >= 100 ? 3 : regno >= 10 ? 2 : 1;
  60   buf[0] = ' ';
  61   buf[1] = letter;
  62   _itoa_word (regno, buf + 2 + n, 10, 0);
  63   buf[2 + n] = ':';
  64   for (++n; n <= 4; ++n)
  65     buf[2 + n] = ' ';
  66   hexvalue (value[0], buf + 7, 16);
  67   if (letter == 'F')
  68     {
  69       hexvalue (value[1], buf + 7 + 16, 16);
  70       buf[7 + 32] = '\n';
  71     }
  72   else
  73     buf[7 + 16] = '\n';
  74 }
  75
  76 static void
  77 register_dump (int fd, struct sigcontext *ctx)
  78 {
  79   char gpregs[32 - 5][8 + 16];
  80   char fpregs[128 - 32][8 + 32];
  81   char bpregs[3][8 + 16];
  82   char spregs[8][16];
  83   struct iovec iov[146];
  84   size_t nr = 0;
  85   int i;
  86
  87 #define ADD_STRING(str) \
  88   do                                                                          \
  89     {                                                                         \
  90       iov[nr].iov_base = (char *) str;                                        \
  91       iov[nr].iov_len = strlen (str);                                         \
  92       ++nr;                                                                   \
  93     }                                                                         \
  94   while (0)
  95 #define ADD_MEM(str, len) \
  96   do                                                                          \
  97     {                                                                         \
  98       iov[nr].iov_base = str;                                                 \
  99       iov[nr].iov_len = len;                                                  \
 100       ++nr;                                                                   \
 101     }                                                                         \
 102   while (0)
 103
 104   /* Generate strings of register contents.  */
 105   for (i = 1; i < 4; ++i)
 106     {
 107       regvalue (&ctx->sc_gr[i], 'R', i, gpregs[i - 1]);
 108       if (ctx->sc_nat & (1L << i))
 109         memcpy (gpregs[i - 1] + 7, "NaT             ", 16);
 110     }
 111   for (i = 8; i < 32; ++i)
 112     {
 113       regvalue (&ctx->sc_gr[i], 'R', i, gpregs[i - 5]);
 114       if (ctx->sc_nat & (1L << i))
 115         memcpy (gpregs[i - 1] + 7, "NaT             ", 16);
 116     }
 117   memcpy (gpregs[0] + 1, "GP:", 3);
 118   memcpy (gpregs[7] + 1, "SP: ", 4);
 119   memcpy (gpregs[8] + 1, "TP: ", 4);
 120
 121   regvalue (&ctx->sc_br[0], 'B', 0, bpregs[0]);
 122   regvalue (&ctx->sc_br[6], 'B', 6, bpregs[1]);
 123   regvalue (&ctx->sc_br[7], 'B', 7, bpregs[2]);
 124   memcpy (bpregs[0] + 1, "RP:", 3);
 125
 126   if (ctx->sc_flags & IA64_SC_FLAG_FPH_VALID)
 127     for (i = 32; i < 128; ++i)
 128       regvalue (&ctx->sc_fr[i].u.bits[0], 'F', i, fpregs[i - 32]);
 129
 130   hexvalue (ctx->sc_ip, spregs[0], sizeof (spregs[0]));
 131   hexvalue (ctx->sc_ar_rsc, spregs[1], sizeof (spregs[1]));
 132   hexvalue (ctx->sc_pr, spregs[2], sizeof (spregs[2]));
 133   hexvalue (ctx->sc_ar_pfs, spregs[3], sizeof (spregs[3]));
 134   hexvalue (ctx->sc_ar_unat, spregs[4], sizeof (spregs[4]));
 135   hexvalue (ctx->sc_cfm, spregs[5], sizeof (spregs[5]));
 136   hexvalue (ctx->sc_ar_ccv, spregs[6], sizeof (spregs[6]));
 137   hexvalue (ctx->sc_ar_fpsr, spregs[7], sizeof (spregs[7]));
 138
 139   /* Generate the output.  */
 140   ADD_STRING ("Register dump:\n\n");
 141
 142   for (i = 0; i < 32 - 5; ++i)
 143     ADD_MEM (gpregs[i], sizeof (gpregs[0]) - 1 + ((i % 3) == 2));
 144   ADD_STRING ("\n");
 145
 146   for (i = 0; i < 3; ++i)
 147     ADD_MEM (bpregs[i], sizeof (bpregs[0]) - 1);
 148
 149   ADD_STRING ("\n\n IP:   ");
 150   ADD_MEM (spregs[0], sizeof (spregs[0]));
 151   ADD_STRING (" RSC:  ");
 152   ADD_MEM (spregs[1], sizeof (spregs[0]));
 153   ADD_STRING (" PR:   ");
 154   ADD_MEM (spregs[2], sizeof (spregs[0]));
 155   ADD_STRING ("\n PFS:  ");
 156   ADD_MEM (spregs[3], sizeof (spregs[0]));
 157   ADD_STRING (" UNAT: ");
 158   ADD_MEM (spregs[4], sizeof (spregs[0]));
 159   ADD_STRING (" CFM:  ");
 160   ADD_MEM (spregs[5], sizeof (spregs[0]));
 161   ADD_STRING ("\n CCV:  ");
 162   ADD_MEM (spregs[6], sizeof (spregs[0]));
 163   ADD_STRING (" FPSR: ");
 164   ADD_MEM (spregs[7], sizeof (spregs[0]));
 165   ADD_STRING ("\n");
 166
 167   if (ctx->sc_flags & IA64_SC_FLAG_FPH_VALID)
 168     {
 169       ADD_STRING ("\n");
 170
 171       for (i = 0; i < 128 - 32; ++i)
 172         ADD_MEM (fpregs[i], sizeof (fpregs[0]) - 1 + (i & 1));
 173     }
 174
 175   /* Write the stuff out.  */
 176   writev (fd, iov, nr);
 177 }
 178
 179
 180 #define REGISTER_DUMP register_dump (fd, ctx)