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linux-amd64-ipa.c
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1 /* GNU/Linux/x86-64 specific low level interface, for the in-process
2  agent library for GDB.
3 
4  Copyright (C) 2010-2015 Free Software Foundation, Inc.
5 
6  This file is part of GDB.
7 
8  This program is free software; you can redistribute it and/or modify
9  it under the terms of the GNU General Public License as published by
10  the Free Software Foundation; either version 3 of the License, or
11  (at your option) any later version.
12 
13  This program is distributed in the hope that it will be useful,
14  but WITHOUT ANY WARRANTY; without even the implied warranty of
15  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16  GNU General Public License for more details.
17 
18  You should have received a copy of the GNU General Public License
19  along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 
21 #include "server.h"
22 #include "tracepoint.h"
23 
24 /* Defined in auto-generated file amd64-linux.c. */
25 void init_registers_amd64_linux (void);
26 extern const struct target_desc *tdesc_amd64_linux;
27 
28 /* fast tracepoints collect registers. */
29 
30 #define FT_CR_RIP 0
31 #define FT_CR_EFLAGS 1
32 #define FT_CR_R8 2
33 #define FT_CR_R9 3
34 #define FT_CR_R10 4
35 #define FT_CR_R11 5
36 #define FT_CR_R12 6
37 #define FT_CR_R13 7
38 #define FT_CR_R14 8
39 #define FT_CR_R15 9
40 #define FT_CR_RAX 10
41 #define FT_CR_RBX 11
42 #define FT_CR_RCX 12
43 #define FT_CR_RDX 13
44 #define FT_CR_RSI 14
45 #define FT_CR_RDI 15
46 #define FT_CR_RBP 16
47 #define FT_CR_RSP 17
48 
49 static const int x86_64_ft_collect_regmap[] = {
50  FT_CR_RAX * 8, FT_CR_RBX * 8, FT_CR_RCX * 8, FT_CR_RDX * 8,
51  FT_CR_RSI * 8, FT_CR_RDI * 8, FT_CR_RBP * 8, FT_CR_RSP * 8,
52  FT_CR_R8 * 8, FT_CR_R9 * 8, FT_CR_R10 * 8, FT_CR_R11 * 8,
53  FT_CR_R12 * 8, FT_CR_R13 * 8, FT_CR_R14 * 8, FT_CR_R15 * 8,
54  FT_CR_RIP * 8, FT_CR_EFLAGS * 8
55 };
56 
57 #define X86_64_NUM_FT_COLLECT_GREGS \
58  (sizeof (x86_64_ft_collect_regmap) / sizeof(x86_64_ft_collect_regmap[0]))
59 
60 void
61 supply_fast_tracepoint_registers (struct regcache *regcache,
62  const unsigned char *buf)
63 {
64  int i;
65 
66  for (i = 0; i < X86_64_NUM_FT_COLLECT_GREGS; i++)
67  supply_register (regcache, i,
68  ((char *) buf) + x86_64_ft_collect_regmap[i]);
69 }
70 
72 gdb_agent_get_raw_reg (const unsigned char *raw_regs, int regnum)
73 {
74  if (regnum >= X86_64_NUM_FT_COLLECT_GREGS)
75  return 0;
76 
77  return *(ULONGEST *) (raw_regs + x86_64_ft_collect_regmap[regnum]);
78 }
79 
80 #ifdef HAVE_UST
81 
82 #include <ust/processor.h>
83 
84 /* "struct registers" is the UST object type holding the registers at
85  the time of the static tracepoint marker call. This doesn't
86  contain RIP, but we know what it must have been (the marker
87  address). */
88 
89 #define ST_REGENTRY(REG) \
90  { \
91  offsetof (struct registers, REG), \
92  sizeof (((struct registers *) NULL)->REG) \
93  }
94 
95 static struct
96 {
97  int offset;
98  int size;
99 } x86_64_st_collect_regmap[] =
100  {
101  ST_REGENTRY(rax),
102  ST_REGENTRY(rbx),
103  ST_REGENTRY(rcx),
104  ST_REGENTRY(rdx),
105  ST_REGENTRY(rsi),
106  ST_REGENTRY(rdi),
107  ST_REGENTRY(rbp),
108  ST_REGENTRY(rsp),
109  ST_REGENTRY(r8),
110  ST_REGENTRY(r9),
111  ST_REGENTRY(r10),
112  ST_REGENTRY(r11),
113  ST_REGENTRY(r12),
114  ST_REGENTRY(r13),
115  ST_REGENTRY(r14),
116  ST_REGENTRY(r15),
117  { -1, 0 },
118  ST_REGENTRY(rflags),
119  ST_REGENTRY(cs),
120  ST_REGENTRY(ss),
121  };
122 
123 #define X86_64_NUM_ST_COLLECT_GREGS \
124  (sizeof (x86_64_st_collect_regmap) / sizeof (x86_64_st_collect_regmap[0]))
125 
126 /* GDB's RIP register number. */
127 #define AMD64_RIP_REGNUM 16
128 
129 void
130 supply_static_tracepoint_registers (struct regcache *regcache,
131  const unsigned char *buf,
132  CORE_ADDR pc)
133 {
134  int i;
135  unsigned long newpc = pc;
136 
137  supply_register (regcache, AMD64_RIP_REGNUM, &newpc);
138 
139  for (i = 0; i < X86_64_NUM_ST_COLLECT_GREGS; i++)
140  if (x86_64_st_collect_regmap[i].offset != -1)
141  {
142  switch (x86_64_st_collect_regmap[i].size)
143  {
144  case 8:
145  supply_register (regcache, i,
146  ((char *) buf)
147  + x86_64_st_collect_regmap[i].offset);
148  break;
149  case 2:
150  {
151  unsigned long reg
152  = * (short *) (((char *) buf)
153  + x86_64_st_collect_regmap[i].offset);
154  reg &= 0xffff;
155  supply_register (regcache, i, &reg);
156  }
157  break;
158  default:
159  internal_error (__FILE__, __LINE__,
160  "unhandled register size: %d",
161  x86_64_st_collect_regmap[i].size);
162  break;
163  }
164  }
165 }
166 
167 #endif /* HAVE_UST */
168 
169 void
171 {
173  ipa_tdesc = tdesc_amd64_linux;
174 }
#define IP_AGENT_EXPORT_FUNC
Definition: tracepoint.h:65
#define FT_CR_RSI
#define FT_CR_EFLAGS
bfd_vma CORE_ADDR
Definition: common-types.h:41
void internal_error(const char *file, int line, const char *fmt,...)
Definition: errors.c:50
regnum
#define FT_CR_RDX
#define FT_CR_RIP
IP_AGENT_EXPORT_FUNC ULONGEST gdb_agent_get_raw_reg(const unsigned char *raw_regs, int regnum)
#define X86_64_NUM_FT_COLLECT_GREGS
#define FT_CR_R15
int offset
Definition: tracepoint.c:179
#define FT_CR_R11
void init_registers_amd64_linux(void)
Definition: amd64-linux.c:94
const struct target_desc * tdesc_amd64_linux
Definition: amd64-linux.c:91
#define FT_CR_R10
#define FT_CR_RSP
#define FT_CR_RCX
static const int x86_64_ft_collect_regmap[]
#define FT_CR_R13
#define FT_CR_R8
#define FT_CR_RBX
void initialize_low_tracepoint(void)
#define FT_CR_R12
unsigned long long ULONGEST
Definition: common-types.h:53
#define FT_CR_R9
#define FT_CR_RDI
#define FT_CR_RBP
void supply_register(struct regcache *regcache, int n, const void *buf)
Definition: regcache.c:330
#define FT_CR_R14
#define FT_CR_RAX
void supply_fast_tracepoint_registers(struct regcache *regcache, const unsigned char *buf)