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

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-stable/] [gdb-7.2/] [gdb/] [armobsd-tdep.c] - Blame information for rev 841

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 330 jeremybenn
/* Target-dependent code for OpenBSD/arm.
2
 
3
   Copyright (C) 2006, 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 "trad-frame.h"
23
#include "tramp-frame.h"
24
 
25
#include "gdb_string.h"
26
 
27
#include "obsd-tdep.h"
28
#include "arm-tdep.h"
29
#include "solib-svr4.h"
30
 
31
/* Signal trampolines.  */
32
 
33
static void
34
armobsd_sigframe_init (const struct tramp_frame *self,
35
                       struct frame_info *this_frame,
36
                       struct trad_frame_cache *cache,
37
                       CORE_ADDR func)
38
{
39
  CORE_ADDR sp, sigcontext_addr, addr;
40
  int regnum;
41
 
42
  /* We find the appropriate instance of `struct sigcontext' at a
43
     fixed offset in the signal frame.  */
44
  sp = get_frame_register_signed (this_frame, ARM_SP_REGNUM);
45
  sigcontext_addr = sp + 16;
46
 
47
  /* PC.  */
48
  trad_frame_set_reg_addr (cache, ARM_PC_REGNUM, sigcontext_addr + 76);
49
 
50
  /* GPRs.  */
51
  for (regnum = ARM_A1_REGNUM, addr = sigcontext_addr + 12;
52
       regnum <= ARM_LR_REGNUM; regnum++, addr += 4)
53
    trad_frame_set_reg_addr (cache, regnum, addr);
54
 
55
  trad_frame_set_id (cache, frame_id_build (sp, func));
56
}
57
 
58
static const struct tramp_frame armobsd_sigframe =
59
{
60
  SIGTRAMP_FRAME,
61
  4,
62
  {
63
    { 0xe28d0010, -1 },         /* add     r0, sp, #16 */
64
    { 0xef000067, -1 },         /* swi     SYS_sigreturn */
65
    { 0xef000001, -1 },         /* swi     SYS_exit */
66
    { 0xeafffffc, -1 },         /* b       . - 8 */
67
    { TRAMP_SENTINEL_INSN, -1 }
68
  },
69
  armobsd_sigframe_init
70
};
71
 
72
 
73
/* Override default thumb breakpoints.  */
74
static const char arm_obsd_thumb_le_breakpoint[] = {0xfe, 0xdf};
75
static const char arm_obsd_thumb_be_breakpoint[] = {0xdf, 0xfe};
76
 
77
static void
78
armobsd_init_abi (struct gdbarch_info info,
79
                  struct gdbarch *gdbarch)
80
{
81
  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
82
 
83
  if (tdep->fp_model == ARM_FLOAT_AUTO)
84
    tdep->fp_model = ARM_FLOAT_SOFT_VFP;
85
 
86
  tramp_frame_prepend_unwinder (gdbarch, &armobsd_sigframe);
87
 
88
  /* OpenBSD/arm uses SVR4-style shared libraries.  */
89
  set_solib_svr4_fetch_link_map_offsets
90
    (gdbarch, svr4_ilp32_fetch_link_map_offsets);
91
  set_gdbarch_skip_solib_resolver (gdbarch, obsd_skip_solib_resolver);
92
 
93
  tdep->jb_pc = 24;
94
  tdep->jb_elt_size = 4;
95
 
96
  set_gdbarch_regset_from_core_section
97
    (gdbarch, armbsd_regset_from_core_section);
98
 
99
  /* OpenBSD/arm uses -fpcc-struct-return by default.  */
100
  tdep->struct_return = pcc_struct_return;
101
 
102
  /* Single stepping.  */
103
  set_gdbarch_software_single_step (gdbarch, arm_software_single_step);
104
 
105
  /* Breakpoints.  */
106
  switch (info.byte_order)
107
    {
108
    case BFD_ENDIAN_BIG:
109
      tdep->thumb_breakpoint = arm_obsd_thumb_be_breakpoint;
110
      tdep->thumb_breakpoint_size = sizeof (arm_obsd_thumb_be_breakpoint);
111
      break;
112
 
113
    case BFD_ENDIAN_LITTLE:
114
      tdep->thumb_breakpoint = arm_obsd_thumb_le_breakpoint;
115
      tdep->thumb_breakpoint_size = sizeof (arm_obsd_thumb_le_breakpoint);
116
      break;
117
    }
118
}
119
 
120
 
121
static enum gdb_osabi
122
armobsd_core_osabi_sniffer (bfd *abfd)
123
{
124
  if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
125
    return GDB_OSABI_OPENBSD_ELF;
126
 
127
  return GDB_OSABI_UNKNOWN;
128
}
129
 
130
/* Provide a prototype to silence -Wmissing-prototypes.  */
131
extern initialize_file_ftype _initialize_armobsd_tdep;
132
 
133
void
134
_initialize_armobsd_tdep (void)
135
{
136
  /* BFD doesn't set a flavour for NetBSD style a.out core files.  */
137
  gdbarch_register_osabi_sniffer (bfd_arch_arm, bfd_target_unknown_flavour,
138
                                  armobsd_core_osabi_sniffer);
139
 
140
  gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_OPENBSD_ELF,
141
                          armobsd_init_abi);
142
}

powered by: WebSVN 2.1.0

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