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fa593d66 PA |
1 | /* GNU/Linux/x86-64 specific low level interface, for the in-process |
2 | agent library for GDB. | |
3 | ||
618f726f | 4 | Copyright (C) 2010-2016 Free Software Foundation, Inc. |
fa593d66 PA |
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" | |
a13c4696 | 22 | #include <sys/mman.h> |
7c3a12ca | 23 | #include "tracepoint.h" |
ae91f625 | 24 | #include "linux-x86-tdesc.h" |
fa593d66 PA |
25 | |
26 | /* Defined in auto-generated file amd64-linux.c. */ | |
27 | void init_registers_amd64_linux (void); | |
3aee8918 | 28 | extern const struct target_desc *tdesc_amd64_linux; |
fa593d66 PA |
29 | |
30 | /* fast tracepoints collect registers. */ | |
31 | ||
32 | #define FT_CR_RIP 0 | |
33 | #define FT_CR_EFLAGS 1 | |
34 | #define FT_CR_R8 2 | |
35 | #define FT_CR_R9 3 | |
36 | #define FT_CR_R10 4 | |
37 | #define FT_CR_R11 5 | |
38 | #define FT_CR_R12 6 | |
39 | #define FT_CR_R13 7 | |
40 | #define FT_CR_R14 8 | |
41 | #define FT_CR_R15 9 | |
42 | #define FT_CR_RAX 10 | |
43 | #define FT_CR_RBX 11 | |
44 | #define FT_CR_RCX 12 | |
45 | #define FT_CR_RDX 13 | |
46 | #define FT_CR_RSI 14 | |
47 | #define FT_CR_RDI 15 | |
48 | #define FT_CR_RBP 16 | |
49 | #define FT_CR_RSP 17 | |
50 | ||
51 | static const int x86_64_ft_collect_regmap[] = { | |
52 | FT_CR_RAX * 8, FT_CR_RBX * 8, FT_CR_RCX * 8, FT_CR_RDX * 8, | |
53 | FT_CR_RSI * 8, FT_CR_RDI * 8, FT_CR_RBP * 8, FT_CR_RSP * 8, | |
54 | FT_CR_R8 * 8, FT_CR_R9 * 8, FT_CR_R10 * 8, FT_CR_R11 * 8, | |
55 | FT_CR_R12 * 8, FT_CR_R13 * 8, FT_CR_R14 * 8, FT_CR_R15 * 8, | |
56 | FT_CR_RIP * 8, FT_CR_EFLAGS * 8 | |
57 | }; | |
58 | ||
59 | #define X86_64_NUM_FT_COLLECT_GREGS \ | |
60 | (sizeof (x86_64_ft_collect_regmap) / sizeof(x86_64_ft_collect_regmap[0])) | |
61 | ||
62 | void | |
63 | supply_fast_tracepoint_registers (struct regcache *regcache, | |
64 | const unsigned char *buf) | |
65 | { | |
66 | int i; | |
67 | ||
68 | for (i = 0; i < X86_64_NUM_FT_COLLECT_GREGS; i++) | |
69 | supply_register (regcache, i, | |
70 | ((char *) buf) + x86_64_ft_collect_regmap[i]); | |
71 | } | |
72 | ||
1cda1512 MK |
73 | ULONGEST |
74 | get_raw_reg (const unsigned char *raw_regs, int regnum) | |
6a271cae | 75 | { |
35f5825a | 76 | if (regnum >= X86_64_NUM_FT_COLLECT_GREGS) |
6a271cae PA |
77 | return 0; |
78 | ||
79 | return *(ULONGEST *) (raw_regs + x86_64_ft_collect_regmap[regnum]); | |
80 | } | |
81 | ||
0fb4aa4b PA |
82 | #ifdef HAVE_UST |
83 | ||
84 | #include <ust/processor.h> | |
85 | ||
86 | /* "struct registers" is the UST object type holding the registers at | |
87 | the time of the static tracepoint marker call. This doesn't | |
88 | contain RIP, but we know what it must have been (the marker | |
89 | address). */ | |
90 | ||
91 | #define ST_REGENTRY(REG) \ | |
92 | { \ | |
93 | offsetof (struct registers, REG), \ | |
94 | sizeof (((struct registers *) NULL)->REG) \ | |
95 | } | |
96 | ||
97 | static struct | |
98 | { | |
99 | int offset; | |
100 | int size; | |
101 | } x86_64_st_collect_regmap[] = | |
102 | { | |
103 | ST_REGENTRY(rax), | |
104 | ST_REGENTRY(rbx), | |
105 | ST_REGENTRY(rcx), | |
106 | ST_REGENTRY(rdx), | |
107 | ST_REGENTRY(rsi), | |
108 | ST_REGENTRY(rdi), | |
109 | ST_REGENTRY(rbp), | |
110 | ST_REGENTRY(rsp), | |
111 | ST_REGENTRY(r8), | |
112 | ST_REGENTRY(r9), | |
113 | ST_REGENTRY(r10), | |
114 | ST_REGENTRY(r11), | |
115 | ST_REGENTRY(r12), | |
116 | ST_REGENTRY(r13), | |
117 | ST_REGENTRY(r14), | |
118 | ST_REGENTRY(r15), | |
119 | { -1, 0 }, | |
120 | ST_REGENTRY(rflags), | |
121 | ST_REGENTRY(cs), | |
122 | ST_REGENTRY(ss), | |
123 | }; | |
124 | ||
125 | #define X86_64_NUM_ST_COLLECT_GREGS \ | |
126 | (sizeof (x86_64_st_collect_regmap) / sizeof (x86_64_st_collect_regmap[0])) | |
127 | ||
128 | /* GDB's RIP register number. */ | |
129 | #define AMD64_RIP_REGNUM 16 | |
130 | ||
131 | void | |
132 | supply_static_tracepoint_registers (struct regcache *regcache, | |
133 | const unsigned char *buf, | |
134 | CORE_ADDR pc) | |
135 | { | |
136 | int i; | |
137 | unsigned long newpc = pc; | |
138 | ||
139 | supply_register (regcache, AMD64_RIP_REGNUM, &newpc); | |
140 | ||
141 | for (i = 0; i < X86_64_NUM_ST_COLLECT_GREGS; i++) | |
142 | if (x86_64_st_collect_regmap[i].offset != -1) | |
143 | { | |
144 | switch (x86_64_st_collect_regmap[i].size) | |
145 | { | |
146 | case 8: | |
147 | supply_register (regcache, i, | |
148 | ((char *) buf) | |
149 | + x86_64_st_collect_regmap[i].offset); | |
150 | break; | |
151 | case 2: | |
152 | { | |
153 | unsigned long reg | |
154 | = * (short *) (((char *) buf) | |
155 | + x86_64_st_collect_regmap[i].offset); | |
156 | reg &= 0xffff; | |
157 | supply_register (regcache, i, ®); | |
158 | } | |
159 | break; | |
160 | default: | |
161 | internal_error (__FILE__, __LINE__, | |
162 | "unhandled register size: %d", | |
163 | x86_64_st_collect_regmap[i].size); | |
164 | break; | |
165 | } | |
166 | } | |
167 | } | |
168 | ||
169 | #endif /* HAVE_UST */ | |
170 | ||
ae91f625 MK |
171 | /* Return target_desc to use for IPA, given the tdesc index passed by |
172 | gdbserver. */ | |
173 | ||
174 | const struct target_desc * | |
175 | get_ipa_tdesc (int idx) | |
176 | { | |
177 | switch (idx) | |
178 | { | |
179 | case X86_TDESC_SSE: | |
180 | return tdesc_amd64_linux; | |
181 | case X86_TDESC_AVX: | |
182 | return tdesc_amd64_avx_linux; | |
183 | case X86_TDESC_MPX: | |
184 | return tdesc_amd64_mpx_linux; | |
2b863f51 WT |
185 | case X86_TDESC_AVX_MPX: |
186 | return tdesc_amd64_avx_mpx_linux; | |
ae91f625 MK |
187 | case X86_TDESC_AVX512: |
188 | return tdesc_amd64_avx512_linux; | |
189 | default: | |
190 | internal_error (__FILE__, __LINE__, | |
191 | "unknown ipa tdesc index: %d", idx); | |
192 | return tdesc_amd64_linux; | |
193 | } | |
194 | } | |
195 | ||
a13c4696 MK |
196 | /* Allocate buffer for the jump pads. Since we're using 32-bit jumps |
197 | to reach them, and the executable is at low addresses, MAP_32BIT | |
198 | works just fine. Shared libraries, being allocated at the top, | |
199 | are unfortunately out of luck. */ | |
200 | ||
201 | void * | |
202 | alloc_jump_pad_buffer (size_t size) | |
203 | { | |
204 | void *res = mmap (NULL, size, PROT_READ | PROT_WRITE | PROT_EXEC, | |
205 | MAP_PRIVATE | MAP_ANONYMOUS | MAP_32BIT, -1, 0); | |
206 | ||
207 | if (res == MAP_FAILED) | |
208 | return NULL; | |
209 | ||
210 | return res; | |
211 | } | |
212 | ||
fa593d66 PA |
213 | void |
214 | initialize_low_tracepoint (void) | |
215 | { | |
216 | init_registers_amd64_linux (); | |
ae91f625 | 217 | init_registers_amd64_avx_linux (); |
2b863f51 | 218 | init_registers_amd64_avx_mpx_linux (); |
ae91f625 MK |
219 | init_registers_amd64_mpx_linux (); |
220 | init_registers_amd64_avx512_linux (); | |
fa593d66 | 221 | } |