GDB (xrefs)
/tmp/gdb-7.10/gdb/armnbsd-tdep.c
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1 /* Target-dependent code for NetBSD/arm.
2 
3  Copyright (C) 2002-2015 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 
23 #include "arm-tdep.h"
24 #include "solib-svr4.h"
25 
26 /* Description of the longjmp buffer. */
27 #define ARM_NBSD_JB_PC 24
28 #define ARM_NBSD_JB_ELEMENT_SIZE INT_REGISTER_SIZE
29 
30 /* For compatibility with previous implemenations of GDB on arm/NetBSD,
31  override the default little-endian breakpoint. */
32 static const gdb_byte arm_nbsd_arm_le_breakpoint[] = {0x11, 0x00, 0x00, 0xe6};
33 static const gdb_byte arm_nbsd_arm_be_breakpoint[] = {0xe6, 0x00, 0x00, 0x11};
34 static const gdb_byte arm_nbsd_thumb_le_breakpoint[] = {0xfe, 0xde};
35 static const gdb_byte arm_nbsd_thumb_be_breakpoint[] = {0xde, 0xfe};
36 
37 static void
39  struct gdbarch *gdbarch)
40 {
41  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
42 
43  tdep->lowest_pc = 0x8000;
44  switch (info.byte_order)
45  {
46  case BFD_ENDIAN_LITTLE:
51  break;
52 
53  case BFD_ENDIAN_BIG:
58  break;
59 
60  default:
61  internal_error (__FILE__, __LINE__,
62  _("arm_gdbarch_init: bad byte order for float format"));
63  }
64 
65  tdep->jb_pc = ARM_NBSD_JB_PC;
67 
68  /* Single stepping. */
70 }
71 
72 static void
74  struct gdbarch *gdbarch)
75 {
76  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
77 
78  arm_netbsd_init_abi_common (info, gdbarch);
79  if (tdep->fp_model == ARM_FLOAT_AUTO)
81 }
82 
83 static void
85  struct gdbarch *gdbarch)
86 {
87  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
88 
89  arm_netbsd_init_abi_common (info, gdbarch);
90  if (tdep->fp_model == ARM_FLOAT_AUTO)
92 
93  /* NetBSD ELF uses SVR4-style shared libraries. */
96 }
97 
98 static enum gdb_osabi
100 {
101  if (strcmp (bfd_get_target (abfd), "a.out-arm-netbsd") == 0)
102  return GDB_OSABI_NETBSD_AOUT;
103 
104  return GDB_OSABI_UNKNOWN;
105 }
106 
107 /* Provide a prototype to silence -Wmissing-prototypes. */
109 
110 void
112 {
113  gdbarch_register_osabi_sniffer (bfd_arch_arm, bfd_target_aout_flavour,
115 
120 }
const gdb_byte * thumb_breakpoint
Definition: arm-tdep.h:181
int arm_software_single_step(struct frame_info *frame)
Definition: arm-tdep.c:5302
static void arm_netbsd_elf_init_abi(struct gdbarch_info info, struct gdbarch *gdbarch)
Definition: armnbsd-tdep.c:84
enum arm_float_model fp_model
Definition: arm-tdep.h:161
void internal_error(const char *file, int line, const char *fmt,...)
Definition: errors.c:50
void gdbarch_register_osabi_sniffer(enum bfd_architecture arch, enum bfd_flavour flavour, enum gdb_osabi(*sniffer_fn)(bfd *))
Definition: osabi.c:225
const gdb_byte * arm_breakpoint
Definition: arm-tdep.h:179
struct link_map_offsets * svr4_ilp32_fetch_link_map_offsets(void)
Definition: solib-svr4.c:3149
CORE_ADDR lowest_pc
Definition: aarch64-tdep.h:76
#define _(String)
Definition: gdb_locale.h:40
struct gdbarch_tdep * gdbarch_tdep(struct gdbarch *gdbarch)
Definition: gdbarch.c:1402
static const gdb_byte arm_nbsd_arm_be_breakpoint[]
Definition: armnbsd-tdep.c:33
int thumb_breakpoint_size
Definition: arm-tdep.h:182
void initialize_file_ftype(void)
Definition: defs.h:281
static void arm_netbsd_aout_init_abi(struct gdbarch_info info, struct gdbarch *gdbarch)
Definition: armnbsd-tdep.c:73
void set_solib_svr4_fetch_link_map_offsets(struct gdbarch *gdbarch, struct link_map_offsets *(*flmo)(void))
Definition: solib-svr4.c:3108
#define ARM_NBSD_JB_PC
Definition: armnbsd-tdep.c:27
static const gdb_byte arm_nbsd_thumb_le_breakpoint[]
Definition: armnbsd-tdep.c:34
#define ARM_NBSD_JB_ELEMENT_SIZE
Definition: armnbsd-tdep.c:28
size_t jb_elt_size
Definition: aarch64-tdep.h:83
void set_gdbarch_software_single_step(struct gdbarch *gdbarch, gdbarch_software_single_step_ftype software_single_step)
Definition: gdbarch.c:3026
bfd_byte gdb_byte
Definition: common-types.h:38
static void arm_netbsd_init_abi_common(struct gdbarch_info info, struct gdbarch *gdbarch)
Definition: armnbsd-tdep.c:38
static const gdb_byte arm_nbsd_arm_le_breakpoint[]
Definition: armnbsd-tdep.c:32
static const gdb_byte arm_nbsd_thumb_be_breakpoint[]
Definition: armnbsd-tdep.c:35
static enum gdb_osabi arm_netbsd_aout_osabi_sniffer(bfd *abfd)
Definition: armnbsd-tdep.c:99
initialize_file_ftype _initialize_arm_netbsd_tdep
enum bfd_endian byte_order
Definition: gdbarch.h:1552
void gdbarch_register_osabi(enum bfd_architecture arch, unsigned long machine, enum gdb_osabi osabi, void(*init_osabi)(struct gdbarch_info, struct gdbarch *))
Definition: osabi.c:148
int arm_breakpoint_size
Definition: arm-tdep.h:180
gdb_osabi
Definition: defs.h:540