| 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 | |
| 71 | IP_AGENT_EXPORT_FUNC ULONGEST |
| 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, ®); |
| 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 |
| 170 | initialize_low_tracepoint (void) |
| 171 | { |
| 172 | init_registers_amd64_linux (); |
| 173 | ipa_tdesc = tdesc_amd64_linux; |
| 174 | } |