gdb/hppaobsd-tdep.c - gdb

Global variables defined

Functions defined

Macros defined

Source code

  1. /* Target-dependent code for OpenBSD/hppa

  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 "osabi.h"
  22. #include "regcache.h"
  23. #include "regset.h"

  25. #include "hppa-tdep.h"
  26. #include "hppabsd-tdep.h"

  28. /* Core file support.  */

  30. /* Sizeof `struct reg' in <machine/reg.h>.  */
  31. ‌#define HPPAOBSD_SIZEOF_GREGS        (34 * 4) /* OpenBSD 5.1 and earlier.  */
  32. ‌#define HPPANBSD_SIZEOF_GREGS        (46 * 4) /* NetBSD and OpenBSD 5.2 and later.  */

  34. /* Sizeof `struct fpreg' in <machine/reg.h>.  */
  35. ‌#define HPPAOBSD_SIZEOF_FPREGS        (32 * 8)

  37. /* Supply register REGNUM from the buffer specified by GREGS and LEN
  38.    in the general-purpose register set REGSET to register cache
  39.    REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */

  41. static void
  42. ‌hppaobsd_supply_gregset (const struct regset *regset,
  43.                          struct regcache *regcache,
  44.                          int regnum, const void *gregs, size_t len)
  45. {
  46.   gdb_byte zero[4] = { 0 };
  47.   const gdb_byte *regs = gregs;
  48.   size_t offset;
  49.   int i;

  51.   gdb_assert (len >= HPPAOBSD_SIZEOF_GREGS);

  53.   if (regnum == -1 || regnum == HPPA_R0_REGNUM)
  54.     regcache_raw_supply (regcache, HPPA_R0_REGNUM, &zero);
  55.   for (i = HPPA_R1_REGNUM, offset = 4; i <= HPPA_R31_REGNUM; i++, offset += 4)
  56.     {
  57.       if (regnum == -1 || regnum == i)
  58.         regcache_raw_supply (regcache, i, regs + offset);
  59.     }

  61.   if (len >= HPPANBSD_SIZEOF_GREGS)
  62.     {
  63.       if (regnum == -1 || regnum == HPPA_IPSW_REGNUM)
  64.         regcache_raw_supply (regcache, HPPA_IPSW_REGNUM, regs);
  65.       if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
  66.         regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs + 32 * 4);
  67.       if (regnum == -1 || regnum == HPPA_PCSQ_HEAD_REGNUM)
  68.         regcache_raw_supply (regcache, HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4);
  69.       if (regnum == -1 || regnum == HPPA_PCSQ_TAIL_REGNUM)
  70.         regcache_raw_supply (regcache, HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4);
  71.       if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
  72.         regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
  73.       if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
  74.         regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
  75.       if (regnum == -1 || regnum == HPPA_SR0_REGNUM)
  76.         regcache_raw_supply (regcache, HPPA_SR0_REGNUM, regs + 37 * 4);
  77.       if (regnum == -1 || regnum == HPPA_SR1_REGNUM)
  78.         regcache_raw_supply (regcache, HPPA_SR1_REGNUM, regs + 38 * 4);
  79.       if (regnum == -1 || regnum == HPPA_SR2_REGNUM)
  80.         regcache_raw_supply (regcache, HPPA_SR2_REGNUM, regs + 39 * 4);
  81.       if (regnum == -1 || regnum == HPPA_SR3_REGNUM)
  82.         regcache_raw_supply (regcache, HPPA_SR3_REGNUM, regs + 40 * 4);
  83.       if (regnum == -1 || regnum == HPPA_SR4_REGNUM)
  84.         regcache_raw_supply (regcache, HPPA_SR4_REGNUM, regs + 41 * 4);
  85.       if (regnum == -1 || regnum == HPPA_SR5_REGNUM)
  86.         regcache_raw_supply (regcache, HPPA_SR5_REGNUM, regs + 42 * 4);
  87.       if (regnum == -1 || regnum == HPPA_SR6_REGNUM)
  88.         regcache_raw_supply (regcache, HPPA_SR6_REGNUM, regs + 43 * 4);
  89.       if (regnum == -1 || regnum == HPPA_SR7_REGNUM)
  90.         regcache_raw_supply (regcache, HPPA_SR7_REGNUM, regs + 44 * 4);
  91.       if (regnum == -1 || regnum == HPPA_CR26_REGNUM)
  92.         regcache_raw_supply (regcache, HPPA_CR26_REGNUM, regs + 45 * 4);
  93.       if (regnum == -1 || regnum == HPPA_CR27_REGNUM)
  94.         regcache_raw_supply (regcache, HPPA_CR27_REGNUM, regs + 46 * 4);
  95.     }
  96.   else
  97.     {
  98.       if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
  99.         regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs);
  100.       if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
  101.         regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4);
  102.       if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
  103.         regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4);
  104.     }
  105. }

  107. /* Supply register REGNUM from the buffer specified by FPREGS and LEN
  108.    in the floating-point register set REGSET to register cache
  109.    REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */

  111. static void
  112. ‌hppaobsd_supply_fpregset (const struct regset *regset,
  113.                           struct regcache *regcache,
  114.                           int regnum, const void *fpregs, size_t len)
  115. {
  116.   struct gdbarch *gdbarch = get_regcache_arch (regcache);
  117.   const gdb_byte *regs = fpregs;
  118.   int i;

  120.   gdb_assert (len >= HPPAOBSD_SIZEOF_FPREGS);

  122.   for (i = HPPA_FP0_REGNUM; i <= HPPA_FP31R_REGNUM; i++)
  123.     {
  124.       if (regnum == i || regnum == -1)
  125.         regcache_raw_supply (regcache, i, regs + (i - HPPA_FP0_REGNUM) * 4);
  126.     }
  127. }

  129. /* OpenBSD/hppa register sets.  */

  131. ‌static const struct regset hppaobsd_gregset =
  132. {
  133.   NULL,
  134.   hppaobsd_supply_gregset
  135. };

  137. ‌static const struct regset hppaobsd_fpregset =
  138. {
  139.   NULL,
  140.   hppaobsd_supply_fpregset
  141. };

  143. /* Iterate over supported core file register note sections. */

  145. static void
  146. ‌hppaobsd_iterate_over_regset_sections (struct gdbarch *gdbarch,
  147.                                        iterate_over_regset_sections_cb *cb,
  148.                                        void *cb_data,
  149.                                        const struct regcache *regcache)
  150. {
  151.   cb (".reg", HPPAOBSD_SIZEOF_GREGS, &hppaobsd_gregset, NULL, cb_data);
  152.   cb (".reg2", HPPAOBSD_SIZEOF_FPREGS, &hppaobsd_fpregset, NULL, cb_data);
  153. }


  156. static void
  157. ‌hppaobsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
  158. {
  159.   /* Obviously OpenBSD is BSD-based.  */
  160.   hppabsd_init_abi (info, gdbarch);

  162.   /* Core file support.  */
  163.   set_gdbarch_iterate_over_regset_sections
  164.     (gdbarch, hppaobsd_iterate_over_regset_sections);
  165. }


  168. /* OpenBSD uses uses the traditional NetBSD core file format, even for
  169.    ports that use ELF.  */
  170. ‌#define GDB_OSABI_NETBSD_CORE GDB_OSABI_OPENBSD_ELF

  172. static enum gdb_osabi
  173. ‌hppaobsd_core_osabi_sniffer (bfd *abfd)
  174. {
  175.   if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
  176.     return GDB_OSABI_NETBSD_CORE;

  178.   return GDB_OSABI_UNKNOWN;
  179. }


  182. /* Provide a prototype to silence -Wmissing-prototypes.  */
  183. void _initialize_hppabsd_tdep (void);

  185. void
  186. ‌_initialize_hppabsd_tdep (void)
  187. {
  188.   /* BFD doesn't set a flavour for NetBSD style a.out core files.  */
  189.   gdbarch_register_osabi_sniffer (bfd_arch_hppa, bfd_target_unknown_flavour,
  190.                                   hppaobsd_core_osabi_sniffer);

  192.   gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_OPENBSD_ELF,
  193.                           hppaobsd_init_abi);
  194. }