GDB (xrefs)
/tmp/gdb-7.10/gdb/tilegx-linux-tdep.c
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1 /* Target-dependent code for GNU/Linux on Tilera TILE-Gx processors.
2 
3  Copyright (C) 2012-2015 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 #include "linux-tdep.h"
23 #include "glibc-tdep.h"
24 #include "solib-svr4.h"
25 #include "symtab.h"
26 #include "regcache.h"
27 #include "regset.h"
28 #include "tramp-frame.h"
29 #include "trad-frame.h"
30 #include "tilegx-tdep.h"
31 
32 /* Signal trampoline support. */
33 
34 static void
36  struct frame_info *this_frame,
37  struct trad_frame_cache *this_cache,
39 {
40  CORE_ADDR pc = get_frame_register_unsigned (this_frame, 64);
41  CORE_ADDR sp = get_frame_register_unsigned (this_frame, 54);
42 
43  /* Base address of register save area. */
44  CORE_ADDR base = sp
45  + 16 /* Skip ABI_SAVE_AREA. */
46  + 128 /* Skip SIGINFO. */
47  + 40; /* Skip UCONTEXT. */
48 
49  /* Address of saved LR register (R56) which holds previous PC. */
50  CORE_ADDR prev_pc = base + 56 * 8;
51 
52  int i;
53 
54  for (i = 0; i < 56; i++)
55  trad_frame_set_reg_addr (this_cache, i, base + i * 8);
56 
57  trad_frame_set_reg_value (this_cache, 64,
58  get_frame_memory_unsigned (this_frame, prev_pc, 8));
59 
60  /* Save a frame ID. */
61  trad_frame_set_id (this_cache, frame_id_build (base, func));
62 }
63 
64 static const struct tramp_frame tilegx_linux_rt_sigframe =
65 {
67  8,
68  {
69  { 0x00045fe551483000ULL, -1 }, /* { moveli r10, 139 } */
70  { 0x286b180051485000ULL, -1 }, /* { swint1 } */
71  { TRAMP_SENTINEL_INSN, -1 }
72  },
74 };
75 
76 /* Register map; must match struct pt_regs in "ptrace.h". */
77 
78 static const struct regcache_map_entry tilegx_linux_regmap[] =
79  {
81  { 1, TILEGX_PC_REGNUM, 8 },
82  { 1, TILEGX_FAULTNUM_REGNUM, 8 },
83  { 0 }
84  };
85 
86 #define TILEGX_LINUX_SIZEOF_GREGSET (64 * 8)
87 
88 /* TILE-Gx Linux kernel register set. */
89 
90 static const struct regset tilegx_linux_regset =
91 {
94 };
95 
96 
97 static void
100  void *cb_data,
101  const struct regcache *regcache)
102 {
103  cb (".reg", TILEGX_LINUX_SIZEOF_GREGSET, &tilegx_linux_regset,
104  NULL, cb_data);
105 }
106 
107 /* OS specific initialization of gdbarch. */
108 
109 static void
111 {
112  int arch_size = gdbarch_addr_bit (gdbarch);
113 
114  linux_init_abi (info, gdbarch);
115 
116  tramp_frame_prepend_unwinder (gdbarch, &tilegx_linux_rt_sigframe);
117 
120 
121  /* GNU/Linux uses SVR4-style shared libraries. */
122  if (arch_size == 32)
125  else
128 
129  /* Enable TLS support. */
132 
133  /* Shared library handling. */
136 }
137 
138 /* Provide a prototype to silence -Wmissing-prototypes. */
140 
141 void
143 {
144  gdbarch_register_osabi (bfd_arch_tilegx, bfd_mach_tilegx, GDB_OSABI_LINUX,
146 }
void trad_frame_set_reg_addr(struct trad_frame_cache *this_trad_cache, int regnum, CORE_ADDR addr)
Definition: trad-frame.c:119
struct frame_id frame_id_build(CORE_ADDR stack_addr, CORE_ADDR code_addr)
Definition: frame.c:554
bfd_vma CORE_ADDR
Definition: common-types.h:41
void set_gdbarch_fetch_tls_load_module_address(struct gdbarch *gdbarch, gdbarch_fetch_tls_load_module_address_ftype fetch_tls_load_module_address)
Definition: gdbarch.c:2822
#define TRAMP_SENTINEL_INSN
Definition: tramp-frame.h:44
struct link_map_offsets * svr4_lp64_fetch_link_map_offsets(void)
Definition: solib-svr4.c:3180
void(* func)(char *)
void set_gdbarch_skip_trampoline_code(struct gdbarch *gdbarch, gdbarch_skip_trampoline_code_ftype skip_trampoline_code)
Definition: gdbarch.c:3084
CORE_ADDR glibc_skip_solib_resolver(struct gdbarch *gdbarch, CORE_ADDR pc)
Definition: glibc-tdep.c:38
static void tilegx_iterate_over_regset_sections(struct gdbarch *gdbarch, iterate_over_regset_sections_cb *cb, void *cb_data, const struct regcache *regcache)
void trad_frame_set_id(struct trad_frame_cache *this_trad_cache, struct frame_id this_id)
Definition: trad-frame.c:164
void regcache_supply_regset(const struct regset *regset, struct regcache *regcache, int regnum, const void *buf, size_t size)
Definition: regcache.c:1149
void linux_init_abi(struct gdbarch_info info, struct gdbarch *gdbarch)
Definition: linux-tdep.c:2427
struct link_map_offsets * svr4_ilp32_fetch_link_map_offsets(void)
Definition: solib-svr4.c:3149
ULONGEST get_frame_memory_unsigned(struct frame_info *this_frame, CORE_ADDR addr, int len)
Definition: frame.c:2515
CORE_ADDR svr4_fetch_objfile_link_map(struct objfile *objfile)
Definition: solib-svr4.c:1573
Definition: regset.h:34
static void tilegx_linux_sigframe_init(const struct tramp_frame *self, struct frame_info *this_frame, struct trad_frame_cache *this_cache, CORE_ADDR func)
void initialize_file_ftype(void)
Definition: defs.h:281
CORE_ADDR find_solib_trampoline_target(struct frame_info *frame, CORE_ADDR pc)
Definition: minsyms.c:1394
static const struct regcache_map_entry tilegx_linux_regmap[]
initialize_file_ftype _initialize_tilegx_linux_tdep
void set_solib_svr4_fetch_link_map_offsets(struct gdbarch *gdbarch, struct link_map_offsets *(*flmo)(void))
Definition: solib-svr4.c:3108
void regcache_collect_regset(const struct regset *regset, const struct regcache *regcache, int regnum, void *buf, size_t size)
Definition: regcache.c:1162
int gdbarch_addr_bit(struct gdbarch *gdbarch)
Definition: gdbarch.c:1707
void trad_frame_set_reg_value(struct trad_frame_cache *this_trad_cache, int regnum, LONGEST val)
Definition: trad-frame.c:102
void( iterate_over_regset_sections_cb)(const char *sect_name, int size, const struct regset *regset, const char *human_name, void *cb_data)
Definition: gdbarch.h:98
ULONGEST get_frame_register_unsigned(struct frame_info *frame, int regnum)
Definition: frame.c:1194
#define TILEGX_LINUX_SIZEOF_GREGSET
void tramp_frame_prepend_unwinder(struct gdbarch *gdbarch, const struct tramp_frame *tramp_frame)
Definition: tramp-frame.c:145
static void tilegx_linux_init_abi(struct gdbarch_info info, struct gdbarch *gdbarch)
void set_gdbarch_iterate_over_regset_sections(struct gdbarch *gdbarch, gdbarch_iterate_over_regset_sections_ftype iterate_over_regset_sections)
Definition: gdbarch.c:3398
void set_gdbarch_skip_solib_resolver(struct gdbarch *gdbarch, gdbarch_skip_solib_resolver_ftype skip_solib_resolver)
Definition: gdbarch.c:3101
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
Definition: regcache.h:167