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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.1/] [gdb/] [hppanbsd-tdep.c] - Blame information for rev 280

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1 227 jeremybenn
/* Target-dependent code for NetBSD/hppa
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   Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc.
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   This file is part of GDB.
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   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 3 of the License, or
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   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
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#include "defs.h"
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#include "osabi.h"
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#include "regcache.h"
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#include "regset.h"
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#include "trad-frame.h"
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#include "tramp-frame.h"
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#include "gdb_assert.h"
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#include "gdb_string.h"
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#include "hppa-tdep.h"
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#include "hppabsd-tdep.h"
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/* From <machine/mcontext.h>.  */
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static int hppanbsd_mc_reg_offset[] =
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{
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  /* r0 ... r31 */
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      -1,   1 * 4,   2 * 4,   3 * 4,
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   4 * 4,   5 * 4,   6 * 4,   7 * 4,
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   8 * 4,   9 * 4,  10 * 4,  11 * 4,
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  12 * 4,  13 * 4,  14 * 4,  15 * 4,
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  16 * 4,  17 * 4,  18 * 4,  19 * 4,
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  20 * 4,  21 * 4,  22 * 4,  23 * 4,
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  24 * 4,  25 * 4,  26 * 4,  27 * 4,
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  28 * 4,  29 * 4,  30 * 4,  31 * 4,
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  32 * 4,       /* HPPA_SAR_REGNUM */
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  35 * 4,       /* HPPA_PCOQ_HEAD_REGNUM */
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  33 * 4,       /* HPPA_PCSQ_HEAD_REGNUM */
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  36 * 4,       /* HPPA_PCOQ_TAIL_REGNUM */
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  34 * 4,       /* HPPA_PCSQ_TAIL_REGNUM */
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  -1,           /* HPPA_EIEM_REGNUM */
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  -1,           /* HPPA_IIR_REGNUM */
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  -1,           /* HPPA_ISR_REGNUM */
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  -1,           /* HPPA_IOR_REGNUM */
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  -1,           /* spare? */
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  41 * 4,       /* HPPA_SR4_REGNUM */
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  37 * 4,       /* sr0 */
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  38 * 4,       /* sr1 */
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  39 * 4,       /* sr2 */
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  40 * 4,       /* sr3 */
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  /* more tbd */
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};
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static void hppanbsd_sigtramp_cache_init (const struct tramp_frame *,
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                                         struct frame_info *,
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                                         struct trad_frame_cache *,
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                                         CORE_ADDR);
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static const struct tramp_frame hppanbsd_sigtramp_si4 =
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{
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  SIGTRAMP_FRAME,
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  4,
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  {
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    { 0xc7d7c012, -1 }, /*      bb,>=,n %arg3, 30, 1f           */
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    { 0xd6e01c1e, -1 }, /*       depwi 0,31,2,%arg3             */
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    { 0x0ee81093, -1 }, /*      ldw 4(%arg3), %r19              */
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    { 0x0ee01097, -1 }, /*      ldw 0(%arg3), %arg3             */
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                        /* 1:                                   */
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    { 0xe8404000, -1 }, /*      blr %r0, %rp                    */
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    { 0xeae0c002, -1 }, /*      bv,n %r0(%arg3)                 */
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    { 0x08000240, -1 }, /*       nop                            */
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    { 0x0803025a, -1 }, /*      copy %r3, %arg0                 */
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    { 0x20200801, -1 }, /*      ldil -40000000, %r1             */
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    { 0xe420e008, -1 }, /*      be,l 4(%sr7, %r1), %sr0, %r31   */
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    { 0x34160268, -1 }, /*       ldi 134, %t1 ; SYS_setcontext  */
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    { 0x081c025a, -1 }, /*      copy ret0, %arg0                */
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    { 0x20200801, -1 }, /*      ldil -40000000, %r1             */
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    { 0xe420e008, -1 }, /*      be,l 4(%sr7, %r1), %sr0, %r31   */
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    { 0x34160002, -1 }, /*       ldi 1, %t1 ; SYS_exit          */
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    { TRAMP_SENTINEL_INSN, -1 }
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  },
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  hppanbsd_sigtramp_cache_init
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};
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static void
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hppanbsd_sigtramp_cache_init (const struct tramp_frame *self,
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                             struct frame_info *this_frame,
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                             struct trad_frame_cache *this_cache,
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                             CORE_ADDR func)
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{
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  struct gdbarch *gdbarch = get_frame_arch (this_frame);
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  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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  CORE_ADDR sp = get_frame_register_unsigned (this_frame, HPPA_SP_REGNUM);
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  CORE_ADDR base;
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  int *reg_offset;
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  int num_regs;
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  int i;
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  reg_offset = hppanbsd_mc_reg_offset;
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  num_regs = ARRAY_SIZE (hppanbsd_mc_reg_offset);
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  /* frame pointer */
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  base = sp - 0x280;
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  /* offsetof(struct sigframe_siginfo, sf_uc) = 128 */
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  base += 128;
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  /* offsetof(ucontext_t, uc_mcontext) == 40 */
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  base += 40;
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  for (i = 0; i < num_regs; i++)
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    if (reg_offset[i] != -1)
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      trad_frame_set_reg_addr (this_cache, i, base + reg_offset[i]);
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  /* Construct the frame ID using the function start.  */
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  trad_frame_set_id (this_cache, frame_id_build (sp, func));
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}
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/* Core file support.  */
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/* Sizeof `struct reg' in <machine/reg.h>.  */
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#define HPPANBSD_SIZEOF_GREGS   (44 * 4)
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static int hppanbsd_reg_offset[] =
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{
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  /* r0 ... r31 */
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      -1,   1 * 4,   2 * 4,   3 * 4,
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   4 * 4,   5 * 4,   6 * 4,   7 * 4,
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   8 * 4,   9 * 4,  10 * 4,  11 * 4,
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  12 * 4,  13 * 4,  14 * 4,  15 * 4,
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  16 * 4,  17 * 4,  18 * 4,  19 * 4,
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  20 * 4,  21 * 4,  22 * 4,  23 * 4,
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  24 * 4,  25 * 4,  26 * 4,  27 * 4,
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  28 * 4,  29 * 4,  30 * 4,  31 * 4,
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  32 * 4,       /* HPPA_SAR_REGNUM */
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  35 * 4,       /* HPPA_PCOQ_HEAD_REGNUM */
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  33 * 4,       /* HPPA_PCSQ_HEAD_REGNUM */
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  36 * 4,       /* HPPA_PCOQ_TAIL_REGNUM */
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  34 * 4,       /* HPPA_PCSQ_TAIL_REGNUM */
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  -1,           /* HPPA_EIEM_REGNUM */
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  -1,           /* HPPA_IIR_REGNUM */
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  -1,           /* HPPA_ISR_REGNUM */
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  -1,           /* HPPA_IOR_REGNUM */
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};
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/* Supply register REGNUM from the buffer specified by GREGS and LEN
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   in the general-purpose register set REGSET to register cache
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   REGCACHE.  If REGNUM is -1, do this for all registers in REGSET.  */
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static void
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hppanbsd_supply_gregset (const struct regset *regset, struct regcache *regcache,
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                     int regnum, const void *gregs, size_t len)
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{
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  const gdb_byte *regs = gregs;
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  size_t offset;
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  int i;
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  gdb_assert (len >= HPPANBSD_SIZEOF_GREGS);
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  for (i = 0; i < ARRAY_SIZE (hppanbsd_reg_offset); i++)
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    if (hppanbsd_reg_offset[i] != -1)
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      if (regnum == -1 || regnum == i)
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        regcache_raw_supply (regcache, i, regs + hppanbsd_reg_offset[i]);
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}
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/* NetBSD/hppa register set.  */
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static struct regset hppanbsd_gregset =
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{
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  NULL,
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  hppanbsd_supply_gregset
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};
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/* Return the appropriate register set for the core section identified
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   by SECT_NAME and SECT_SIZE.  */
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static const struct regset *
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hppanbsd_regset_from_core_section (struct gdbarch *gdbarch,
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                                  const char *sect_name, size_t sect_size)
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{
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  if (strcmp (sect_name, ".reg") == 0 && sect_size >= HPPANBSD_SIZEOF_GREGS)
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    return &hppanbsd_gregset;
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  return NULL;
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}
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static void
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hppanbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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  /* Obviously NetBSD is BSD-based.  */
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  hppabsd_init_abi (info, gdbarch);
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  /* Core file support.  */
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  set_gdbarch_regset_from_core_section
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    (gdbarch, hppanbsd_regset_from_core_section);
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  tramp_frame_prepend_unwinder (gdbarch, &hppanbsd_sigtramp_si4);
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}
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/* Provide a prototype to silence -Wmissing-prototypes.  */
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extern initialize_file_ftype _initialize_hppanbsd_tdep;
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void
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_initialize_hppanbsd_tdep (void)
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{
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  gdbarch_register_osabi (bfd_arch_hppa, 0, GDB_OSABI_NETBSD_ELF,
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                          hppanbsd_init_abi);
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}

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