gdb/hppa-obsd-tdep.c

   1 /* Target-dependent code for OpenBSD/hppa
   2
   3    Copyright (C) 2004-2020 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 "hppa-bsd-tdep.h"
  27 #include "gdbarch.h"
  28
  29 /* Core file support.  */
  30
  31 /* Sizeof `struct reg' in <machine/reg.h>.  */
  32 #define HPPAOBSD_SIZEOF_GREGS   (34 * 4) /* OpenBSD 5.1 and earlier.  */
  33 #define HPPANBSD_SIZEOF_GREGS   (46 * 4) /* NetBSD and OpenBSD 5.2 and later.  */
  34
  35 /* Sizeof `struct fpreg' in <machine/reg.h>.  */
  36 #define HPPAOBSD_SIZEOF_FPREGS  (32 * 8)
  37
  38 /* Supply register REGNUM from the buffer specified by GREGS and LEN
  39    in the general-purpose register set REGSET to register cache
  40    REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */
  41
  42 static void
  43 hppaobsd_supply_gregset (const struct regset *regset,
  44                          struct regcache *regcache,
  45                          int regnum, const void *gregs, size_t len)
  46 {
  47   gdb_byte zero[4] = { 0 };
  48   const gdb_byte *regs = (const gdb_byte *) gregs;
  49   size_t offset;
  50   int i;
  51
  52   gdb_assert (len >= HPPAOBSD_SIZEOF_GREGS);
  53
  54   if (regnum == -1 || regnum == HPPA_R0_REGNUM)
  55     regcache->raw_supply (HPPA_R0_REGNUM, &zero);
  56   for (i = HPPA_R1_REGNUM, offset = 4; i <= HPPA_R31_REGNUM; i++, offset += 4)
  57     {
  58       if (regnum == -1 || regnum == i)
  59         regcache->raw_supply (i, regs + offset);
  60     }
  61
  62   if (len >= HPPANBSD_SIZEOF_GREGS)
  63     {
  64       if (regnum == -1 || regnum == HPPA_IPSW_REGNUM)
  65         regcache->raw_supply (HPPA_IPSW_REGNUM, regs);
  66       if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
  67         regcache->raw_supply (HPPA_SAR_REGNUM, regs + 32 * 4);
  68       if (regnum == -1 || regnum == HPPA_PCSQ_HEAD_REGNUM)
  69         regcache->raw_supply (HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4);
  70       if (regnum == -1 || regnum == HPPA_PCSQ_TAIL_REGNUM)
  71         regcache->raw_supply (HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4);
  72       if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
  73         regcache->raw_supply (HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
  74       if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
  75         regcache->raw_supply (HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
  76       if (regnum == -1 || regnum == HPPA_SR0_REGNUM)
  77         regcache->raw_supply (HPPA_SR0_REGNUM, regs + 37 * 4);
  78       if (regnum == -1 || regnum == HPPA_SR1_REGNUM)
  79         regcache->raw_supply (HPPA_SR1_REGNUM, regs + 38 * 4);
  80       if (regnum == -1 || regnum == HPPA_SR2_REGNUM)
  81         regcache->raw_supply (HPPA_SR2_REGNUM, regs + 39 * 4);
  82       if (regnum == -1 || regnum == HPPA_SR3_REGNUM)
  83         regcache->raw_supply (HPPA_SR3_REGNUM, regs + 40 * 4);
  84       if (regnum == -1 || regnum == HPPA_SR4_REGNUM)
  85         regcache->raw_supply (HPPA_SR4_REGNUM, regs + 41 * 4);
  86       if (regnum == -1 || regnum == HPPA_SR5_REGNUM)
  87         regcache->raw_supply (HPPA_SR5_REGNUM, regs + 42 * 4);
  88       if (regnum == -1 || regnum == HPPA_SR6_REGNUM)
  89         regcache->raw_supply (HPPA_SR6_REGNUM, regs + 43 * 4);
  90       if (regnum == -1 || regnum == HPPA_SR7_REGNUM)
  91         regcache->raw_supply (HPPA_SR7_REGNUM, regs + 44 * 4);
  92       if (regnum == -1 || regnum == HPPA_CR26_REGNUM)
  93         regcache->raw_supply (HPPA_CR26_REGNUM, regs + 45 * 4);
  94       if (regnum == -1 || regnum == HPPA_CR27_REGNUM)
  95         regcache->raw_supply (HPPA_CR27_REGNUM, regs + 46 * 4);
  96     }
  97   else
  98     {
  99       if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
 100         regcache->raw_supply (HPPA_SAR_REGNUM, regs);
 101       if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
 102         regcache->raw_supply (HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4);
 103       if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
 104         regcache->raw_supply (HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4);
 105     }
 106 }
 107
 108 /* Supply register REGNUM from the buffer specified by FPREGS and LEN
 109    in the floating-point register set REGSET to register cache
 110    REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */
 111
 112 static void
 113 hppaobsd_supply_fpregset (const struct regset *regset,
 114                           struct regcache *regcache,
 115                           int regnum, const void *fpregs, size_t len)
 116 {
 117   const gdb_byte *regs = (const gdb_byte *) fpregs;
 118   int i;
 119
 120   gdb_assert (len >= HPPAOBSD_SIZEOF_FPREGS);
 121
 122   for (i = HPPA_FP0_REGNUM; i <= HPPA_FP31R_REGNUM; i++)
 123     {
 124       if (regnum == i || regnum == -1)
 125         regcache->raw_supply (i, regs + (i - HPPA_FP0_REGNUM) * 4);
 126     }
 127 }
 128
 129 /* OpenBSD/hppa register sets.  */
 130
 131 static const struct regset hppaobsd_gregset =
 132 {
 133   NULL,
 134   hppaobsd_supply_gregset,
 135   NULL,
 136   REGSET_VARIABLE_SIZE
 137 };
 138
 139 static const struct regset hppaobsd_fpregset =
 140 {
 141   NULL,
 142   hppaobsd_supply_fpregset
 143 };
 144
 145 /* Iterate over supported core file register note sections. */
 146
 147 static void
 148 hppaobsd_iterate_over_regset_sections (struct gdbarch *gdbarch,
 149                                        iterate_over_regset_sections_cb *cb,
 150                                        void *cb_data,
 151                                        const struct regcache *regcache)
 152 {
 153   cb (".reg", HPPAOBSD_SIZEOF_GREGS, HPPAOBSD_SIZEOF_GREGS, &hppaobsd_gregset,
 154       NULL, cb_data);
 155   cb (".reg2", HPPAOBSD_SIZEOF_FPREGS, HPPAOBSD_SIZEOF_FPREGS,
 156       &hppaobsd_fpregset, NULL, cb_data);
 157 }
 158 \f
 159
 160 static void
 161 hppaobsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 162 {
 163   /* Obviously OpenBSD is BSD-based.  */
 164   hppabsd_init_abi (info, gdbarch);
 165
 166   /* Core file support.  */
 167   set_gdbarch_iterate_over_regset_sections
 168     (gdbarch, hppaobsd_iterate_over_regset_sections);
 169 }
 170
 171 void
 172 _initialize_hppabsd_tdep (void)
 173 {
 174   gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_OPENBSD,
 175                           hppaobsd_init_abi);
 176 }