gdb/sparc64obsd-nat.c - gdb

Functions defined

Source code

  1. /* Native-dependent code for OpenBSD/sparc64.

  3.    Copyright (C) 2003-2015 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 "gdbcore.h"
  22. #include "regcache.h"
  23. #include "target.h"

  25. #include "sparc64-tdep.h"
  26. #include "sparc-nat.h"
  27. #include "obsd-nat.h"

  29. /* Determine whether `gregset_t' contains register REGNUM.  */

  31. static int
  32. ‌sparc64obsd_gregset_supplies_p (struct gdbarch *gdbarch, int regnum)
  33. {
  34.   /* Integer registers.  */
  35.   if ((regnum >= SPARC_G1_REGNUM && regnum <= SPARC_G7_REGNUM)
  36.       || (regnum >= SPARC_O0_REGNUM && regnum <= SPARC_O7_REGNUM)
  37.       || (regnum >= SPARC_L0_REGNUM && regnum <= SPARC_L7_REGNUM)
  38.       || (regnum >= SPARC_I0_REGNUM && regnum <= SPARC_I7_REGNUM))
  39.     return 1;

  41.   /* Control registers.  */
  42.   if (regnum == SPARC64_PC_REGNUM
  43.       || regnum == SPARC64_NPC_REGNUM
  44.       || regnum == SPARC64_STATE_REGNUM
  45.       || regnum == SPARC64_Y_REGNUM)
  46.     return 1;

  48.   return 0;
  49. }

  51. /* Determine whether `fpregset_t' contains register REGNUM.  */

  53. static int
  54. ‌sparc64obsd_fpregset_supplies_p (struct gdbarch *gdbarch, int regnum)
  55. {
  56.   /* Floating-point registers.  */
  57.   if ((regnum >= SPARC_F0_REGNUM && regnum <= SPARC_F31_REGNUM)
  58.       || (regnum >= SPARC64_F32_REGNUM && regnum <= SPARC64_F62_REGNUM))
  59.     return 1;

  61.   /* Control registers.  */
  62.   if (regnum == SPARC64_FSR_REGNUM)
  63.     return 1;

  65.   return 0;
  66. }


  69. /* Support for debugging kernel virtual memory images.  */

  71. #include <sys/types.h>
  72. #include <machine/pcb.h>

  74. #include "bsd-kvm.h"

  76. static int
  77. ‌sparc64obsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
  78. {
  79.   u_int64_t state;
  80.   int regnum;

  82.   /* The following is true for OpenBSD 3.0:

  84.      The pcb contains %sp and %pc, %pstate and %cwp.  From this
  85.      information we reconstruct the register state as it would look
  86.      when we just returned from cpu_switch().  */

  88.   /* The stack pointer shouldn't be zero.  */
  89.   if (pcb->pcb_sp == 0)
  90.     return 0;

  92.   /* If the program counter is zero, this is probably a core dump, and
  93.      we can get %pc from the stack.  */
  94.   if (pcb->pcb_pc == 0)
  95.       read_memory(pcb->pcb_sp + BIAS - 176 + (11 * 8),
  96.                   (gdb_byte *)&pcb->pcb_pc, sizeof pcb->pcb_pc);

  98.   regcache_raw_supply (regcache, SPARC_SP_REGNUM, &pcb->pcb_sp);
  99.   regcache_raw_supply (regcache, SPARC64_PC_REGNUM, &pcb->pcb_pc);

  101.   state = pcb->pcb_pstate << 8 | pcb->pcb_cwp;
  102.   regcache_raw_supply (regcache, SPARC64_STATE_REGNUM, &state);

  104.   sparc_supply_rwindow (regcache, pcb->pcb_sp, -1);

  106.   return 1;
  107. }


  110. /* Provide a prototype to silence -Wmissing-prototypes.  */
  111. void _initialize_sparc64obsd_nat (void);

  113. void
  114. ‌_initialize_sparc64obsd_nat (void)
  115. {
  116.   sparc_supply_gregset = sparc64_supply_gregset;
  117.   sparc_collect_gregset = sparc64_collect_gregset;
  118.   sparc_supply_fpregset = sparc64_supply_fpregset;
  119.   sparc_collect_fpregset = sparc64_collect_fpregset;
  120.   sparc_gregset_supplies_p = sparc64obsd_gregset_supplies_p;
  121.   sparc_fpregset_supplies_p = sparc64obsd_fpregset_supplies_p;

  123.   sparc_gregmap = &sparc64nbsd_gregmap;
  124.   sparc_fpregmap = &sparc64_bsd_fpregmap;

  126.   /* Add some extra features to the generic SPARC target.  */
  127.   obsd_add_target (sparc_target ());

  129.   /* Support debugging kernel virtual memory images.  */
  130.   bsd_kvm_add_target (sparc64obsd_supply_pcb);
  131. }