gdb/hppaobsd-tdep.c

   1 /* Target-dependent code for OpenBSD/hppa
   2
   3    Copyright (C) 2004-2013 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   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.
  11
  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.
  16
  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/>.  */
  19
  20 #include "defs.h"
  21 #include "osabi.h"
  22 #include "regcache.h"
  23 #include "regset.h"
  24
  25 #include "gdb_assert.h"
  26 #include <string.h>
  27
  28 #include "hppa-tdep.h"
  29 #include "hppabsd-tdep.h"
  30
  31 /* Core file support.  */
  32
  33 /* Sizeof `struct reg' in <machine/reg.h>.  */
  34 #define HPPAOBSD_SIZEOF_GREGS   (34 * 4) /* OpenBSD 5.1 and earlier.  */
  35 #define HPPANBSD_SIZEOF_GREGS   (46 * 4) /* NetBSD and OpenBSD 5.2 and later.  */
  36
  37 /* Sizeof `struct fpreg' in <machine/reg.h>.  */
  38 #define HPPAOBSD_SIZEOF_FPREGS  (32 * 8)
  39
  40 /* Supply register REGNUM from the buffer specified by GREGS and LEN
  41    in the general-purpose register set REGSET to register cache
  42    REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */
  43
  44 static void
  45 hppaobsd_supply_gregset (const struct regset *regset,
  46                          struct regcache *regcache,
  47                          int regnum, const void *gregs, size_t len)
  48 {
  49   gdb_byte zero[4] = { 0 };
  50   const gdb_byte *regs = gregs;
  51   size_t offset;
  52   int i;
  53
  54   gdb_assert (len >= HPPAOBSD_SIZEOF_GREGS);
  55
  56   if (regnum == -1 || regnum == HPPA_R0_REGNUM)
  57     regcache_raw_supply (regcache, HPPA_R0_REGNUM, &zero);
  58   for (i = HPPA_R1_REGNUM, offset = 4; i <= HPPA_R31_REGNUM; i++, offset += 4)
  59     {
  60       if (regnum == -1 || regnum == i)
  61         regcache_raw_supply (regcache, i, regs + offset);
  62     }
  63
  64   if (len >= HPPANBSD_SIZEOF_GREGS)
  65     {
  66       if (regnum == -1 || regnum == HPPA_IPSW_REGNUM)
  67         regcache_raw_supply (regcache, HPPA_IPSW_REGNUM, regs);
  68       if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
  69         regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs + 32 * 4);
  70       if (regnum == -1 || regnum == HPPA_PCSQ_HEAD_REGNUM)
  71         regcache_raw_supply (regcache, HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4);
  72       if (regnum == -1 || regnum == HPPA_PCSQ_TAIL_REGNUM)
  73         regcache_raw_supply (regcache, HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4);
  74       if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
  75         regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
  76       if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
  77         regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
  78       if (regnum == -1 || regnum == HPPA_SR0_REGNUM)
  79         regcache_raw_supply (regcache, HPPA_SR0_REGNUM, regs + 37 * 4);
  80       if (regnum == -1 || regnum == HPPA_SR1_REGNUM)
  81         regcache_raw_supply (regcache, HPPA_SR1_REGNUM, regs + 38 * 4);
  82       if (regnum == -1 || regnum == HPPA_SR2_REGNUM)
  83         regcache_raw_supply (regcache, HPPA_SR2_REGNUM, regs + 39 * 4);
  84       if (regnum == -1 || regnum == HPPA_SR3_REGNUM)
  85         regcache_raw_supply (regcache, HPPA_SR3_REGNUM, regs + 40 * 4);
  86       if (regnum == -1 || regnum == HPPA_SR4_REGNUM)
  87         regcache_raw_supply (regcache, HPPA_SR4_REGNUM, regs + 41 * 4);
  88       if (regnum == -1 || regnum == HPPA_SR5_REGNUM)
  89         regcache_raw_supply (regcache, HPPA_SR5_REGNUM, regs + 42 * 4);
  90       if (regnum == -1 || regnum == HPPA_SR6_REGNUM)
  91         regcache_raw_supply (regcache, HPPA_SR6_REGNUM, regs + 43 * 4);
  92       if (regnum == -1 || regnum == HPPA_SR7_REGNUM)
  93         regcache_raw_supply (regcache, HPPA_SR7_REGNUM, regs + 44 * 4);
  94       if (regnum == -1 || regnum == HPPA_CR26_REGNUM)
  95         regcache_raw_supply (regcache, HPPA_CR26_REGNUM, regs + 45 * 4);
  96       if (regnum == -1 || regnum == HPPA_CR27_REGNUM)
  97         regcache_raw_supply (regcache, HPPA_CR27_REGNUM, regs + 46 * 4);
  98     }
  99   else
 100     {
 101       if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
 102         regcache_raw_supply (regcache, HPPA_SAR_REGNUM, regs);
 103       if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
 104         regcache_raw_supply (regcache, HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4);
 105       if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
 106         regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4);
 107     }
 108 }
 109
 110 /* Supply register REGNUM from the buffer specified by FPREGS and LEN
 111    in the floating-point register set REGSET to register cache
 112    REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */
 113
 114 static void
 115 hppaobsd_supply_fpregset (const struct regset *regset,
 116                           struct regcache *regcache,
 117                           int regnum, const void *fpregs, size_t len)
 118 {
 119   struct gdbarch *gdbarch = get_regcache_arch (regcache);
 120   const gdb_byte *regs = fpregs;
 121   int i;
 122
 123   gdb_assert (len >= HPPAOBSD_SIZEOF_FPREGS);
 124
 125   for (i = HPPA_FP0_REGNUM; i <= HPPA_FP31R_REGNUM; i++)
 126     {
 127       if (regnum == i || regnum == -1)
 128         regcache_raw_supply (regcache, i, regs + (i - HPPA_FP0_REGNUM) * 4);
 129     }
 130 }
 131
 132 /* OpenBSD/hppa register sets.  */
 133
 134 static struct regset hppaobsd_gregset =
 135 {
 136   NULL,
 137   hppaobsd_supply_gregset
 138 };
 139
 140 static struct regset hppaobsd_fpregset =
 141 {
 142   NULL,
 143   hppaobsd_supply_fpregset
 144 };
 145
 146 /* Return the appropriate register set for the core section identified
 147    by SECT_NAME and SECT_SIZE.  */
 148
 149 static const struct regset *
 150 hppaobsd_regset_from_core_section (struct gdbarch *gdbarch,
 151                                   const char *sect_name, size_t sect_size)
 152 {
 153   if (strcmp (sect_name, ".reg") == 0 && sect_size >= HPPAOBSD_SIZEOF_GREGS)
 154     return &hppaobsd_gregset;
 155
 156   if (strcmp (sect_name, ".reg2") == 0 && sect_size >= HPPAOBSD_SIZEOF_FPREGS)
 157     return &hppaobsd_fpregset;
 158
 159   return NULL;
 160 }
 161 \f
 162
 163 static void
 164 hppaobsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 165 {
 166   /* Obviously OpenBSD is BSD-based.  */
 167   hppabsd_init_abi (info, gdbarch);
 168
 169   /* Core file support.  */
 170   set_gdbarch_regset_from_core_section
 171     (gdbarch, hppaobsd_regset_from_core_section);
 172 }
 173 \f
 174
 175 /* OpenBSD uses uses the traditional NetBSD core file format, even for
 176    ports that use ELF.  */
 177 #define GDB_OSABI_NETBSD_CORE GDB_OSABI_OPENBSD_ELF
 178
 179 static enum gdb_osabi
 180 hppaobsd_core_osabi_sniffer (bfd *abfd)
 181 {
 182   if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
 183     return GDB_OSABI_NETBSD_CORE;
 184
 185   return GDB_OSABI_UNKNOWN;
 186 }
 187 \f
 188
 189 /* Provide a prototype to silence -Wmissing-prototypes.  */
 190 void _initialize_hppabsd_tdep (void);
 191
 192 void
 193 _initialize_hppabsd_tdep (void)
 194 {
 195   /* BFD doesn't set a flavour for NetBSD style a.out core files.  */
 196   gdbarch_register_osabi_sniffer (bfd_arch_hppa, bfd_target_unknown_flavour,
 197                                   hppaobsd_core_osabi_sniffer);
 198
 199   gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_OPENBSD_ELF,
 200                           hppaobsd_init_abi);
 201 }