GDBserver
linux-tile-low.c
Go to the documentation of this file.
1 /* GNU/Linux/TILE-Gx specific low level interface, GDBserver.
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 "server.h"
21 #include "linux-low.h"
22 
23 #include <arch/abi.h>
24 #include <sys/ptrace.h>
25 
26 /* Defined in auto-generated file reg-tilegx.c. */
27 void init_registers_tilegx (void);
28 extern const struct target_desc *tdesc_tilegx;
29 
30 /* Defined in auto-generated file reg-tilegx32.c. */
31 void init_registers_tilegx32 (void);
32 extern const struct target_desc *tdesc_tilegx32;
33 
34 #define tile_num_regs 65
35 
36 static int tile_regmap[] =
37 {
38  0, 1, 2, 3, 4, 5, 6, 7,
39  8, 9, 10, 11, 12, 13, 14, 15,
40  16, 17, 18, 19, 20, 21, 22, 23,
41  24, 25, 26, 27, 28, 29, 30, 31,
42  32, 33, 34, 35, 36, 37, 38, 39,
43  40, 41, 42, 43, 44, 45, 46, 47,
44  48, 49, 50, 51, 52, 53, 54, 55,
45  -1, -1, -1, -1, -1, -1, -1, -1,
46  56
47 };
48 
49 static int
51 {
52  if (regno >= 0 && regno < 56)
53  return 0;
54  else if (regno == 64)
55  return 0;
56  else
57  return 1;
58 }
59 
60 static int
62 {
63  if (regno >= 0 && regno < 56)
64  return 0;
65  else if (regno == 64)
66  return 0;
67  else
68  return 1;
69 }
70 
71 static CORE_ADDR
73 {
74  unsigned long pc;
75 
76  collect_register_by_name (regcache, "pc", &pc);
77  return pc;
78 }
79 
80 static void
82 {
83  unsigned long newpc = pc;
84 
85  supply_register_by_name (regcache, "pc", &newpc);
86 }
87 
88 static uint64_t tile_breakpoint = 0x400b3cae70166000ULL;
89 #define tile_breakpoint_len 8
90 
91 static int
93 {
94  uint64_t insn;
95 
96  (*the_target->read_memory) (where, (unsigned char *) &insn, 8);
97  if (insn == tile_breakpoint)
98  return 1;
99 
100  /* If necessary, recognize more trap instructions here. GDB only uses the
101  one. */
102  return 0;
103 }
104 
105 static void
106 tile_fill_gregset (struct regcache *regcache, void *buf)
107 {
108  int i;
109 
110  for (i = 0; i < tile_num_regs; i++)
111  if (tile_regmap[i] != -1)
112  collect_register (regcache, i, ((uint_reg_t *) buf) + tile_regmap[i]);
113 }
114 
115 static void
116 tile_store_gregset (struct regcache *regcache, const void *buf)
117 {
118  int i;
119 
120  for (i = 0; i < tile_num_regs; i++)
121  if (tile_regmap[i] != -1)
122  supply_register (regcache, i, ((uint_reg_t *) buf) + tile_regmap[i]);
123 }
124 
125 static struct regset_info tile_regsets[] =
126 {
127  { PTRACE_GETREGS, PTRACE_SETREGS, 0, tile_num_regs * 8,
128  GENERAL_REGS, tile_fill_gregset, tile_store_gregset },
129  { 0, 0, 0, -1, -1, NULL, NULL }
130 };
131 
132 static struct regsets_info tile_regsets_info =
133  {
134  tile_regsets, /* regsets */
135  0, /* num_regsets */
136  NULL, /* disabled_regsets */
137  };
138 
139 static struct usrregs_info tile_usrregs_info =
140  {
142  tile_regmap,
143  };
144 
145 static struct regs_info regs_info =
146  {
147  NULL, /* regset_bitmap */
150  };
151 
152 static const struct regs_info *
154 {
155  return &regs_info;
156 }
157 
158 static void
160 {
161  int pid = pid_of (current_thread);
162  unsigned int machine;
163  int is_elf64 = linux_pid_exe_is_elf_64_file (pid, &machine);
164 
165  if (sizeof (void *) == 4)
166  if (is_elf64 > 0)
167  error (_("Can't debug 64-bit process with 32-bit GDBserver"));
168 
169  if (!is_elf64)
171  else
173 }
174 
175 
176 struct linux_target_ops the_low_target =
177 {
182  NULL,
183  tile_get_pc,
184  tile_set_pc,
185  (const unsigned char *) &tile_breakpoint,
187  NULL,
188  0,
190 };
191 
192 void
194 {
197 
198  initialize_regsets_info (&tile_regsets_info);
199 }
struct thread_info * current_thread
Definition: inferiors.c:28
void collect_register(struct regcache *regcache, int n, void *buf)
Definition: regcache.c:414
bfd_vma CORE_ADDR
Definition: common-types.h:41
void supply_register_by_name(struct regcache *regcache, const char *name, const void *buf)
Definition: regcache.c:405
static CORE_ADDR tile_get_pc(struct regcache *regcache)
#define _(String)
Definition: gdb_locale.h:40
static void tile_arch_setup(void)
struct target_ops * the_target
Definition: target.c:24
const struct target_desc * tdesc
Definition: inferiors.h:69
static uint64_t tile_breakpoint
static const struct regs_info * tile_regs_info(void)
#define tile_num_regs
static int tile_regmap[]
void collect_register_by_name(struct regcache *regcache, const char *name, void *buf)
Definition: regcache.c:430
static void tile_set_pc(struct regcache *regcache, CORE_ADDR pc)
void initialize_low_arch(void)
const struct target_desc * tdesc_tilegx
static int tile_cannot_fetch_register(int regno)
static struct usrregs_info tile_usrregs_info
static struct regs_info regs_info
struct process_info * current_process(void)
Definition: inferiors.c:356
const struct target_desc * tdesc_tilegx32
static void tile_store_gregset(struct regcache *regcache, const void *buf)
int linux_pid_exe_is_elf_64_file(int pid, unsigned int *machine)
Definition: linux-low.c:379
void init_registers_tilegx32(void)
static int tile_cannot_store_register(int regno)
int(* read_memory)(CORE_ADDR memaddr, unsigned char *myaddr, int len)
Definition: target.h:160
#define pid_of(inf)
Definition: inferiors.h:76
void init_registers_tilegx(void)
static struct regset_info tile_regsets[]
#define tile_breakpoint_len
static int tile_breakpoint_at(CORE_ADDR where)
void supply_register(struct regcache *regcache, int n, const void *buf)
Definition: regcache.c:330
void error(const char *fmt,...)
Definition: errors.c:38
static void tile_fill_gregset(struct regcache *regcache, void *buf)
static struct regsets_info tile_regsets_info