OpenCores
URL https://opencores.org/ocsvn/openrisc_me/openrisc_me/trunk

Subversion Repositories openrisc_me

[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.1/] [gdb/] [mips64obsd-tdep.c] - Blame information for rev 280

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 227 jeremybenn
/* Target-dependent code for OpenBSD/mips64.
2
 
3
   Copyright (C) 2004, 2007, 2008, 2009, 2010 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
#include "trad-frame.h"
25
#include "tramp-frame.h"
26
 
27
#include "gdb_assert.h"
28
#include "gdb_string.h"
29
 
30
#include "mips-tdep.h"
31
#include "solib-svr4.h"
32
 
33
#define MIPS64OBSD_NUM_REGS 73
34
 
35
/* Core file support.  */
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
mips64obsd_supply_gregset (const struct regset *regset,
43
                           struct regcache *regcache, int regnum,
44
                           const void *gregs, size_t len)
45
{
46
  const char *regs = gregs;
47
  int i;
48
 
49
  for (i = 0; i < MIPS64OBSD_NUM_REGS; i++)
50
    {
51
      if (regnum == i || regnum == -1)
52
        regcache_raw_supply (regcache, i, regs + i * 8);
53
    }
54
}
55
 
56
/* OpenBSD/mips64 register set.  */
57
 
58
static struct regset mips64obsd_gregset =
59
{
60
  NULL,
61
  mips64obsd_supply_gregset
62
};
63
 
64
/* Return the appropriate register set for the core section identified
65
   by SECT_NAME and SECT_SIZE.  */
66
 
67
static const struct regset *
68
mips64obsd_regset_from_core_section (struct gdbarch *gdbarch,
69
                                     const char *sect_name, size_t sect_size)
70
{
71
  if (strcmp (sect_name, ".reg") == 0 && sect_size >= MIPS64OBSD_NUM_REGS * 8)
72
    return &mips64obsd_gregset;
73
 
74
  return NULL;
75
}
76
 
77
 
78
/* Signal trampolines.  */
79
 
80
static void
81
mips64obsd_sigframe_init (const struct tramp_frame *self,
82
                          struct frame_info *this_frame,
83
                          struct trad_frame_cache *cache,
84
                          CORE_ADDR func)
85
{
86
  struct gdbarch *gdbarch = get_frame_arch (this_frame);
87
  CORE_ADDR sp, sigcontext_addr, addr;
88
  int regnum;
89
 
90
  /* We find the appropriate instance of `struct sigcontext' at a
91
     fixed offset in the signal frame.  */
92
  sp = get_frame_register_signed (this_frame,
93
                                  MIPS_SP_REGNUM + gdbarch_num_regs (gdbarch));
94
  sigcontext_addr = sp + 32;
95
 
96
  /* PC.  */
97
  regnum = mips_regnum (gdbarch)->pc;
98
  trad_frame_set_reg_addr (cache,
99
                           regnum + gdbarch_num_regs (gdbarch),
100
                            sigcontext_addr + 16);
101
 
102
  /* GPRs.  */
103
  for (regnum = MIPS_AT_REGNUM, addr = sigcontext_addr + 32;
104
       regnum <= MIPS_RA_REGNUM; regnum++, addr += 8)
105
    trad_frame_set_reg_addr (cache,
106
                             regnum + gdbarch_num_regs (gdbarch),
107
                             addr);
108
 
109
  /* HI and LO.  */
110
  regnum = mips_regnum (gdbarch)->lo;
111
  trad_frame_set_reg_addr (cache,
112
                           regnum + gdbarch_num_regs (gdbarch),
113
                           sigcontext_addr + 280);
114
  regnum = mips_regnum (gdbarch)->hi;
115
  trad_frame_set_reg_addr (cache,
116
                           regnum + gdbarch_num_regs (gdbarch),
117
                           sigcontext_addr + 288);
118
 
119
  /* TODO: Handle the floating-point registers.  */
120
 
121
  trad_frame_set_id (cache, frame_id_build (sp, func));
122
}
123
 
124
static const struct tramp_frame mips64obsd_sigframe =
125
{
126
  SIGTRAMP_FRAME,
127
  MIPS_INSN32_SIZE,
128
  {
129
    { 0x67a40020, -1 },         /* daddiu  a0,sp,32 */
130
    { 0x24020067, -1 },         /* li      v0,103 */
131
    { 0x0000000c, -1 },         /* syscall */
132
    { 0x0000000d, -1 },         /* break */
133
    { TRAMP_SENTINEL_INSN, -1 }
134
  },
135
  mips64obsd_sigframe_init
136
};
137
 
138
 
139
static void
140
mips64obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
141
{
142
  /* OpenBSD/mips64 only supports the n64 ABI, but the braindamaged
143
     way GDB works, forces us to pretend we can handle them all.  */
144
 
145
  set_gdbarch_regset_from_core_section
146
    (gdbarch, mips64obsd_regset_from_core_section);
147
 
148
  tramp_frame_prepend_unwinder (gdbarch, &mips64obsd_sigframe);
149
 
150
  /* OpenBSD/mips64 has SVR4-style shared libraries.  */
151
  set_solib_svr4_fetch_link_map_offsets
152
    (gdbarch, svr4_lp64_fetch_link_map_offsets);
153
}
154
 
155
 
156
/* Provide a prototype to silence -Wmissing-prototypes.  */
157
void _initialize_mips64obsd_tdep (void);
158
 
159
void
160
_initialize_mips64obsd_tdep (void)
161
{
162
  gdbarch_register_osabi (bfd_arch_mips, 0, GDB_OSABI_OPENBSD_ELF,
163
                          mips64obsd_init_abi);
164
}

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.