gdb/hppaobsd-tdep.c

   1 /* Target-dependent code for OpenBSD/hppa
   2
   3    Copyright (C) 2004-2016 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 "hppa-tdep.h"
  26 #include "hppabsd-tdep.h"
  27
  28 /* Core file support.  */
  29
  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.  */
  33
  34 /* Sizeof `struct fpreg' in <machine/reg.h>.  */
  35 #define HPPAOBSD_SIZEOF_FPREGS  (32 * 8)
  36
  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.  */
  40
  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 = (const gdb_byte *) gregs;
  48   size_t offset;
  49   int i;
  50
  51   gdb_assert (len >= HPPAOBSD_SIZEOF_GREGS);
  52
  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     }
  60
  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 }
 106
 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.  */
 110
 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   const gdb_byte *regs = (const gdb_byte *) fpregs;
 117   int i;
 118
 119   gdb_assert (len >= HPPAOBSD_SIZEOF_FPREGS);
 120
 121   for (i = HPPA_FP0_REGNUM; i <= HPPA_FP31R_REGNUM; i++)
 122     {
 123       if (regnum == i || regnum == -1)
 124         regcache_raw_supply (regcache, i, regs + (i - HPPA_FP0_REGNUM) * 4);
 125     }
 126 }
 127
 128 /* OpenBSD/hppa register sets.  */
 129
 130 static const struct regset hppaobsd_gregset =
 131 {
 132   NULL,
 133   hppaobsd_supply_gregset,
 134   NULL,
 135   REGSET_VARIABLE_SIZE
 136 };
 137
 138 static const struct regset hppaobsd_fpregset =
 139 {
 140   NULL,
 141   hppaobsd_supply_fpregset
 142 };
 143
 144 /* Iterate over supported core file register note sections. */
 145
 146 static void
 147 hppaobsd_iterate_over_regset_sections (struct gdbarch *gdbarch,
 148                                        iterate_over_regset_sections_cb *cb,
 149                                        void *cb_data,
 150                                        const struct regcache *regcache)
 151 {
 152   cb (".reg", HPPAOBSD_SIZEOF_GREGS, &hppaobsd_gregset, NULL, cb_data);
 153   cb (".reg2", HPPAOBSD_SIZEOF_FPREGS, &hppaobsd_fpregset, NULL, cb_data);
 154 }
 155 \f
 156
 157 static void
 158 hppaobsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 159 {
 160   /* Obviously OpenBSD is BSD-based.  */
 161   hppabsd_init_abi (info, gdbarch);
 162
 163   /* Core file support.  */
 164   set_gdbarch_iterate_over_regset_sections
 165     (gdbarch, hppaobsd_iterate_over_regset_sections);
 166 }
 167 \f
 168
 169 /* OpenBSD uses uses the traditional NetBSD core file format, even for
 170    ports that use ELF.  */
 171 #define GDB_OSABI_NETBSD_CORE GDB_OSABI_OPENBSD_ELF
 172
 173 static enum gdb_osabi
 174 hppaobsd_core_osabi_sniffer (bfd *abfd)
 175 {
 176   if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
 177     return GDB_OSABI_NETBSD_CORE;
 178
 179   return GDB_OSABI_UNKNOWN;
 180 }
 181 \f
 182
 183 /* Provide a prototype to silence -Wmissing-prototypes.  */
 184 void _initialize_hppabsd_tdep (void);
 185
 186 void
 187 _initialize_hppabsd_tdep (void)
 188 {
 189   /* BFD doesn't set a flavour for NetBSD style a.out core files.  */
 190   gdbarch_register_osabi_sniffer (bfd_arch_hppa, bfd_target_unknown_flavour,
 191                                   hppaobsd_core_osabi_sniffer);
 192
 193   gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_OPENBSD_ELF,
 194                           hppaobsd_init_abi);
 195 }