gdb/hppa-obsd-tdep.c

   1 /* Target-dependent code for OpenBSD/hppa
   2
   3    Copyright (C) 2004-2024 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 "osabi.h"
  21 #include "regcache.h"
  22 #include "regset.h"
  23
  24 #include "hppa-tdep.h"
  25 #include "hppa-bsd-tdep.h"
  26 #include "gdbarch.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   const gdb_byte *regs = (const gdb_byte *) gregs;
  47   size_t offset;
  48   int i;
  49
  50   gdb_assert (len >= HPPAOBSD_SIZEOF_GREGS);
  51
  52   if (regnum == -1 || regnum == HPPA_R0_REGNUM)
  53     regcache->raw_supply_zeroed (HPPA_R0_REGNUM);
  54   for (i = HPPA_R1_REGNUM, offset = 4; i <= HPPA_R31_REGNUM; i++, offset += 4)
  55     {
  56       if (regnum == -1 || regnum == i)
  57         regcache->raw_supply (i, regs + offset);
  58     }
  59
  60   if (len >= HPPANBSD_SIZEOF_GREGS)
  61     {
  62       if (regnum == -1 || regnum == HPPA_IPSW_REGNUM)
  63         regcache->raw_supply (HPPA_IPSW_REGNUM, regs);
  64       if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
  65         regcache->raw_supply (HPPA_SAR_REGNUM, regs + 32 * 4);
  66       if (regnum == -1 || regnum == HPPA_PCSQ_HEAD_REGNUM)
  67         regcache->raw_supply (HPPA_PCSQ_HEAD_REGNUM, regs + 33 * 4);
  68       if (regnum == -1 || regnum == HPPA_PCSQ_TAIL_REGNUM)
  69         regcache->raw_supply (HPPA_PCSQ_TAIL_REGNUM, regs + 34 * 4);
  70       if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
  71         regcache->raw_supply (HPPA_PCOQ_HEAD_REGNUM, regs + 35 * 4);
  72       if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
  73         regcache->raw_supply (HPPA_PCOQ_TAIL_REGNUM, regs + 36 * 4);
  74       if (regnum == -1 || regnum == HPPA_SR0_REGNUM)
  75         regcache->raw_supply (HPPA_SR0_REGNUM, regs + 37 * 4);
  76       if (regnum == -1 || regnum == HPPA_SR1_REGNUM)
  77         regcache->raw_supply (HPPA_SR1_REGNUM, regs + 38 * 4);
  78       if (regnum == -1 || regnum == HPPA_SR2_REGNUM)
  79         regcache->raw_supply (HPPA_SR2_REGNUM, regs + 39 * 4);
  80       if (regnum == -1 || regnum == HPPA_SR3_REGNUM)
  81         regcache->raw_supply (HPPA_SR3_REGNUM, regs + 40 * 4);
  82       if (regnum == -1 || regnum == HPPA_SR4_REGNUM)
  83         regcache->raw_supply (HPPA_SR4_REGNUM, regs + 41 * 4);
  84       if (regnum == -1 || regnum == HPPA_SR5_REGNUM)
  85         regcache->raw_supply (HPPA_SR5_REGNUM, regs + 42 * 4);
  86       if (regnum == -1 || regnum == HPPA_SR6_REGNUM)
  87         regcache->raw_supply (HPPA_SR6_REGNUM, regs + 43 * 4);
  88       if (regnum == -1 || regnum == HPPA_SR7_REGNUM)
  89         regcache->raw_supply (HPPA_SR7_REGNUM, regs + 44 * 4);
  90       if (regnum == -1 || regnum == HPPA_CR26_REGNUM)
  91         regcache->raw_supply (HPPA_CR26_REGNUM, regs + 45 * 4);
  92       if (regnum == -1 || regnum == HPPA_CR27_REGNUM)
  93         regcache->raw_supply (HPPA_CR27_REGNUM, regs + 46 * 4);
  94     }
  95   else
  96     {
  97       if (regnum == -1 || regnum == HPPA_SAR_REGNUM)
  98         regcache->raw_supply (HPPA_SAR_REGNUM, regs);
  99       if (regnum == -1 || regnum == HPPA_PCOQ_HEAD_REGNUM)
 100         regcache->raw_supply (HPPA_PCOQ_HEAD_REGNUM, regs + 32 * 4);
 101       if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
 102         regcache->raw_supply (HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4);
 103     }
 104 }
 105
 106 /* Supply register REGNUM from the buffer specified by FPREGS and LEN
 107    in the floating-point register set REGSET to register cache
 108    REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */
 109
 110 static void
 111 hppaobsd_supply_fpregset (const struct regset *regset,
 112                           struct regcache *regcache,
 113                           int regnum, const void *fpregs, size_t len)
 114 {
 115   const gdb_byte *regs = (const gdb_byte *) fpregs;
 116   int i;
 117
 118   gdb_assert (len >= HPPAOBSD_SIZEOF_FPREGS);
 119
 120   for (i = HPPA_FP0_REGNUM; i <= HPPA_FP31R_REGNUM; i++)
 121     {
 122       if (regnum == i || regnum == -1)
 123         regcache->raw_supply (i, regs + (i - HPPA_FP0_REGNUM) * 4);
 124     }
 125 }
 126
 127 /* OpenBSD/hppa register sets.  */
 128
 129 static const struct regset hppaobsd_gregset =
 130 {
 131   NULL,
 132   hppaobsd_supply_gregset,
 133   NULL,
 134   REGSET_VARIABLE_SIZE
 135 };
 136
 137 static const struct regset hppaobsd_fpregset =
 138 {
 139   NULL,
 140   hppaobsd_supply_fpregset
 141 };
 142
 143 /* Iterate over supported core file register note sections. */
 144
 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_SIZEOF_GREGS, &hppaobsd_gregset,
 152       NULL, cb_data);
 153   cb (".reg2", HPPAOBSD_SIZEOF_FPREGS, HPPAOBSD_SIZEOF_FPREGS,
 154       &hppaobsd_fpregset, NULL, cb_data);
 155 }
 156 \f
 157
 158 static void
 159 hppaobsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 160 {
 161   /* Obviously OpenBSD is BSD-based.  */
 162   hppabsd_init_abi (info, gdbarch);
 163
 164   /* Core file support.  */
 165   set_gdbarch_iterate_over_regset_sections
 166     (gdbarch, hppaobsd_iterate_over_regset_sections);
 167 }
 168
 169 void _initialize_hppabsd_tdep ();
 170 void
 171 _initialize_hppabsd_tdep ()
 172 {
 173   gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_OPENBSD,
 174                           hppaobsd_init_abi);
 175 }