ports/sysdeps/unix/sysv/linux/tile/tilegx/register-dump.h

   1 /* Copyright (C) 2011-2014 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
   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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <sys/uio.h>
  20 #include <_itoa.h>
  21
  22 /* We will print the register dump in this format:
  23
  24  R0:  XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX
  25  R4:  XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX
  26  R8:  XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX
  27  R12: XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX
  28  R16: XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX
  29  R20: XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX
  30  R24: XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX
  31  R28: XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX
  32  R32: XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX
  33  R36: XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX
  34  R40: XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX
  35  R44: XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX
  36  R48: XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXX
  37  R52: XXXXXXXXXXXXXXXX  TP: XXXXXXXXXXXXXXXX
  38  SP:  XXXXXXXXXXXXXXXX  LR: XXXXXXXXXXXXXXXX
  39
  40  PC:  XXXXXXXXXXXXXXXX  ICS: X  FAULTNUM: XX
  41
  42  */
  43
  44 static void
  45 hexvalue (unsigned long int value, char *buf, size_t len)
  46 {
  47   char *cp = _itoa_word (value, buf + len, 16, 0);
  48   while (cp > buf)
  49     *--cp = '0';
  50 }
  51
  52 static void
  53 register_dump (int fd, mcontext_t *ctx)
  54 {
  55   char regs[59][16];
  56   struct iovec iov[132];
  57   size_t nr = 0;
  58   unsigned int i;
  59
  60 #define ADD_STRING(str) \
  61   iov[nr].iov_base = (char *) str;                                            \
  62   iov[nr].iov_len = strlen (str);                                             \
  63   ++nr
  64 #define ADD_MEM(str, len) \
  65   iov[nr].iov_base = str;                                                     \
  66   iov[nr].iov_len = len;                                                      \
  67   ++nr
  68
  69   /* Generate strings of register contents.  */
  70   for (i = 0; i < 56; ++i)
  71     hexvalue (ctx->gregs[i], regs[i], 16);
  72   hexvalue (ctx->pc, regs[56], 16);
  73   hexvalue (ctx->ics, regs[57], 1);
  74   hexvalue (ctx->faultnum, regs[58], 2);
  75
  76   /* Generate the output.  */
  77   for (i = 0; i < 56;)
  78     {
  79       const char *prefixes[] = {
  80         "Register dump:\n\n R0:  ",
  81         "\n R4:  ",
  82         "\n R8:  ",
  83         "\n R12: ",
  84         "\n R16: ",
  85         "\n R20:  ",
  86         "\n R24:  ",
  87         "\n R28:  ",
  88         "\n R32:  ",
  89         "\n R36:  ",
  90         "\n R40:  ",
  91         "\n R44:  ",
  92         "\n R48:  "
  93       };
  94       ADD_STRING (prefixes[i / 4]);
  95       do
  96         {
  97           ADD_MEM (regs[i], 16);
  98           ADD_STRING (" ");
  99         }
 100       while (++i % 4);
 101     }
 102   ADD_STRING ("\n R52: ");
 103   ADD_MEM (regs[52], 16);
 104   ADD_STRING ("  TP: ");
 105   ADD_MEM (regs[53], 16);
 106   ADD_STRING ("\n SP: ");
 107   ADD_MEM (regs[54], 16);
 108   ADD_STRING ("  LR: ");
 109   ADD_MEM (regs[55], 16);
 110   ADD_STRING ("\n\n PC:  ");
 111   ADD_MEM (regs[56], 16);
 112   ADD_STRING ("  ICS: ");
 113   ADD_MEM (regs[57], 1);
 114   ADD_STRING ("  FAULTNUM: ");
 115   ADD_MEM (regs[58], 2);
 116   ADD_STRING ("\n");
 117
 118   /* Write the stuff out.  */
 119   writev (fd, iov, nr);
 120 }
 121
 122
 123 #define REGISTER_DUMP register_dump (fd, &ctx->uc_mcontext)