gdb/sparc64nbsd-nat.c - gdb

Functions defined

Source code

  1. /* Native-dependent code for NetBSD/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"

  28. /* NetBSD is different from the other OSes that support both SPARC and
  29.    UltraSPARC in that the result of ptrace(2) depends on whether the
  30.    traced process is 32-bit or 64-bit.  */

  32. static void
  33. ‌sparc64nbsd_supply_gregset (const struct sparc_gregmap *gregmap,
  34.                             struct regcache *regcache,
  35.                             int regnum, const void *gregs)
  36. {
  37.   int sparc32 = (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32);

  39.   if (sparc32)
  40.     sparc32_supply_gregset (&sparc32nbsd_gregmap, regcache, regnum, gregs);
  41.   else
  42.     sparc64_supply_gregset (&sparc64nbsd_gregmap, regcache, regnum, gregs);
  43. }

  45. static void
  46. ‌sparc64nbsd_collect_gregset (const struct sparc_gregmap *gregmap,
  47.                              const struct regcache *regcache,
  48.                              int regnum, void *gregs)
  49. {
  50.   int sparc32 = (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32);

  52.   if (sparc32)
  53.     sparc32_collect_gregset (&sparc32nbsd_gregmap, regcache, regnum, gregs);
  54.   else
  55.     sparc64_collect_gregset (&sparc64nbsd_gregmap, regcache, regnum, gregs);
  56. }

  58. static void
  59. ‌sparc64nbsd_supply_fpregset (const struct sparc_fpregmap *fpregmap,
  60.                              struct regcache *regcache,
  61.                              int regnum, const void *fpregs)
  62. {
  63.   int sparc32 = (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32);

  65.   if (sparc32)
  66.     sparc32_supply_fpregset (&sparc32_bsd_fpregmap, regcache, regnum, fpregs);
  67.   else
  68.     sparc64_supply_fpregset (&sparc64_bsd_fpregmap, regcache, regnum, fpregs);
  69. }

  71. static void
  72. ‌sparc64nbsd_collect_fpregset (const struct sparc_fpregmap *fpregmap,
  73.                               const struct regcache *regcache,
  74.                               int regnum, void *fpregs)
  75. {
  76.   int sparc32 = (gdbarch_ptr_bit (get_regcache_arch (regcache)) == 32);

  78.   if (sparc32)
  79.     sparc32_collect_fpregset (&sparc32_bsd_fpregmap, regcache, regnum, fpregs);
  80.   else
  81.     sparc64_collect_fpregset (&sparc64_bsd_fpregmap, regcache, regnum, fpregs);
  82. }

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

  86. static int
  87. ‌sparc64nbsd_gregset_supplies_p (struct gdbarch *gdbarch, int regnum)
  88. {
  89.   if (gdbarch_ptr_bit (gdbarch) == 32)
  90.     return sparc32_gregset_supplies_p (gdbarch, regnum);

  92.   /* Integer registers.  */
  93.   if ((regnum >= SPARC_G1_REGNUM && regnum <= SPARC_G7_REGNUM)
  94.       || (regnum >= SPARC_O0_REGNUM && regnum <= SPARC_O7_REGNUM)
  95.       || (regnum >= SPARC_L0_REGNUM && regnum <= SPARC_L7_REGNUM)
  96.       || (regnum >= SPARC_I0_REGNUM && regnum <= SPARC_I7_REGNUM))
  97.     return 1;

  99.   /* Control registers.  */
  100.   if (regnum == SPARC64_PC_REGNUM
  101.       || regnum == SPARC64_NPC_REGNUM
  102.       || regnum == SPARC64_STATE_REGNUM
  103.       || regnum == SPARC64_Y_REGNUM)
  104.     return 1;

  106.   return 0;
  107. }

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

  111. static int
  112. ‌sparc64nbsd_fpregset_supplies_p (struct gdbarch *gdbarch, int regnum)
  113. {
  114.   if (gdbarch_ptr_bit (gdbarch) == 32)
  115.     return sparc32_fpregset_supplies_p (gdbarch, regnum);

  117.   /* Floating-point registers.  */
  118.   if ((regnum >= SPARC_F0_REGNUM && regnum <= SPARC_F31_REGNUM)
  119.       || (regnum >= SPARC64_F32_REGNUM && regnum <= SPARC64_F62_REGNUM))
  120.     return 1;

  122.   /* Control registers.  */
  123.   if (regnum == SPARC64_FSR_REGNUM)
  124.     return 1;

  126.   return 0;
  127. }


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

  132. #include <sys/types.h>
  133. #include <machine/pcb.h>

  135. #include "bsd-kvm.h"

  137. static int
  138. ‌sparc64nbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
  139. {
  140.   u_int64_t state;
  141.   int regnum;

  143.   /* The following is true for NetBSD 1.6.2:

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

  149.   /* The stack pointer shouldn't be zero.  */
  150.   if (pcb->pcb_sp == 0)
  151.     return 0;

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

  159.   regcache_raw_supply (regcache, SPARC_SP_REGNUM, &pcb->pcb_sp);
  160.   regcache_raw_supply (regcache, SPARC64_PC_REGNUM, &pcb->pcb_pc);

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

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

  167.   return 1;
  168. }


  171. /* Provide a prototype to silence -Wmissing-prototypes.  */
  172. void _initialize_sparc64nbsd_nat (void);

  174. void
  175. ‌_initialize_sparc64nbsd_nat (void)
  176. {
  177.   sparc_supply_gregset = sparc64nbsd_supply_gregset;
  178.   sparc_collect_gregset = sparc64nbsd_collect_gregset;
  179.   sparc_supply_fpregset = sparc64nbsd_supply_fpregset;
  180.   sparc_collect_fpregset = sparc64nbsd_collect_fpregset;
  181.   sparc_gregset_supplies_p = sparc64nbsd_gregset_supplies_p;
  182.   sparc_fpregset_supplies_p = sparc64nbsd_fpregset_supplies_p;

  184.   /* We've got nothing to add to the generic SPARC target.  */
  185.   add_target (sparc_target ());

  187.   /* Support debugging kernel virtual memory images.  */
  188.   bsd_kvm_add_target (sparc64nbsd_supply_pcb);
  189. }