gdb/mips64obsd-nat.c - gdb

Functions defined

Macros defined

Source code

  1. /* Native-dependent code for OpenBSD/mips64.

  3.    Copyright (C) 2004-2015 Free Software Foundation, Inc.

  5.    This file is part of GDB.

  7.    This program is free software; you can redistribute it and/or modify
  8.    it under the terms of the GNU General Public License as published by
  9.    the Free Software Foundation; either version 3 of the License, or
  10.    (at your option) any later version.

  12.    This program is distributed in the hope that it will be useful,
  13.    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14.    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15.    GNU General Public License for more details.

  17.    You should have received a copy of the GNU General Public License
  18.    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

  20. #include "defs.h"
  21. #include "inferior.h"
  22. #include "regcache.h"
  23. #include "target.h"

  25. #include <sys/types.h>
  26. #include <sys/ptrace.h>
  27. #include <machine/reg.h>

  29. #include "mips-tdep.h"
  30. #include "inf-ptrace.h"
  31. #include "obsd-nat.h"

  33. /* Shorthand for some register numbers used below.  */
  34. ‌#define MIPS_PC_REGNUM        MIPS_EMBED_PC_REGNUM
  35. ‌#define MIPS_FP0_REGNUM        MIPS_EMBED_FP0_REGNUM
  36. ‌#define MIPS_FSR_REGNUM MIPS_EMBED_FP0_REGNUM + 32

  38. /* Supply the general-purpose registers stored in GREGS to REGCACHE.  */

  40. static void
  41. ‌mips64obsd_supply_gregset (struct regcache *regcache, const void *gregs)
  42. {
  43.   const char *regs = gregs;
  44.   int regnum;

  46.   for (regnum = MIPS_ZERO_REGNUM; regnum <= MIPS_PC_REGNUM; regnum++)
  47.     regcache_raw_supply (regcache, regnum, regs + regnum * 8);

  49.   for (regnum = MIPS_FP0_REGNUM; regnum <= MIPS_FSR_REGNUM; regnum++)
  50.     regcache_raw_supply (regcache, regnum, regs + (regnum + 2) * 8);
  51. }

  53. /* Collect the general-purpose registers from REGCACHE and store them
  54.    in GREGS.  */

  56. static void
  57. ‌mips64obsd_collect_gregset (const struct regcache *regcache,
  58.                             void *gregs, int regnum)
  59. {
  60.   char *regs = gregs;
  61.   int i;

  63.   for (i = MIPS_ZERO_REGNUM; i <= MIPS_PC_REGNUM; i++)
  64.     {
  65.       if (regnum == -1 || regnum == i)
  66.         regcache_raw_collect (regcache, i, regs + i * 8);
  67.     }

  69.   for (i = MIPS_FP0_REGNUM; i <= MIPS_FSR_REGNUM; i++)
  70.     {
  71.       if (regnum == -1 || regnum == i)
  72.         regcache_raw_collect (regcache, i, regs + (i + 2) * 8);
  73.     }
  74. }


  77. /* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
  78.    for all registers.  */

  80. static void
  81. ‌mips64obsd_fetch_inferior_registers (struct target_ops *ops,
  82.                                      struct regcache *regcache, int regnum)
  83. {
  84.   struct reg regs;

  86.   if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid),
  87.               (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  88.     perror_with_name (_("Couldn't get registers"));

  90.   mips64obsd_supply_gregset (regcache, &regs);
  91. }

  93. /* Store register REGNUM back into the inferior.  If REGNUM is -1, do
  94.    this for all registers.  */

  96. static void
  97. ‌mips64obsd_store_inferior_registers (struct target_ops *ops,
  98.                                      struct regcache *regcache, int regnum)
  99. {
  100.   struct reg regs;

  102.   if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid),
  103.               (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  104.     perror_with_name (_("Couldn't get registers"));

  106.   mips64obsd_collect_gregset (regcache, &regs, regnum);

  108.   if (ptrace (PT_SETREGS, ptid_get_pid (inferior_ptid),
  109.               (PTRACE_TYPE_ARG3) &regs, 0) == -1)
  110.     perror_with_name (_("Couldn't write registers"));
  111. }


  114. /* Provide a prototype to silence -Wmissing-prototypes.  */
  115. void _initialize_mips64obsd_nat (void);

  117. void
  118. ‌_initialize_mips64obsd_nat (void)
  119. {
  120.   struct target_ops *t;

  122.   t = inf_ptrace_target ();
  123.   t->to_fetch_registers = mips64obsd_fetch_inferior_registers;
  124.   t->to_store_registers = mips64obsd_store_inferior_registers;
  125.   obsd_add_target (t);
  126. }