| /* GNU/Linux/x86-64 specific low level interface, for the in-process |
| agent library for GDB. |
| |
| Copyright (C) 2010-2016 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #include "server.h" |
| #include "tracepoint.h" |
| |
| /* Defined in auto-generated file amd64-linux.c. */ |
| void init_registers_amd64_linux (void); |
| extern const struct target_desc *tdesc_amd64_linux; |
| |
| /* fast tracepoints collect registers. */ |
| |
| #define FT_CR_RIP 0 |
| #define FT_CR_EFLAGS 1 |
| #define FT_CR_R8 2 |
| #define FT_CR_R9 3 |
| #define FT_CR_R10 4 |
| #define FT_CR_R11 5 |
| #define FT_CR_R12 6 |
| #define FT_CR_R13 7 |
| #define FT_CR_R14 8 |
| #define FT_CR_R15 9 |
| #define FT_CR_RAX 10 |
| #define FT_CR_RBX 11 |
| #define FT_CR_RCX 12 |
| #define FT_CR_RDX 13 |
| #define FT_CR_RSI 14 |
| #define FT_CR_RDI 15 |
| #define FT_CR_RBP 16 |
| #define FT_CR_RSP 17 |
| |
| static const int x86_64_ft_collect_regmap[] = { |
| FT_CR_RAX * 8, FT_CR_RBX * 8, FT_CR_RCX * 8, FT_CR_RDX * 8, |
| FT_CR_RSI * 8, FT_CR_RDI * 8, FT_CR_RBP * 8, FT_CR_RSP * 8, |
| FT_CR_R8 * 8, FT_CR_R9 * 8, FT_CR_R10 * 8, FT_CR_R11 * 8, |
| FT_CR_R12 * 8, FT_CR_R13 * 8, FT_CR_R14 * 8, FT_CR_R15 * 8, |
| FT_CR_RIP * 8, FT_CR_EFLAGS * 8 |
| }; |
| |
| #define X86_64_NUM_FT_COLLECT_GREGS \ |
| (sizeof (x86_64_ft_collect_regmap) / sizeof(x86_64_ft_collect_regmap[0])) |
| |
| void |
| supply_fast_tracepoint_registers (struct regcache *regcache, |
| const unsigned char *buf) |
| { |
| int i; |
| |
| for (i = 0; i < X86_64_NUM_FT_COLLECT_GREGS; i++) |
| supply_register (regcache, i, |
| ((char *) buf) + x86_64_ft_collect_regmap[i]); |
| } |
| |
| IP_AGENT_EXPORT_FUNC ULONGEST |
| gdb_agent_get_raw_reg (const unsigned char *raw_regs, int regnum) |
| { |
| if (regnum >= X86_64_NUM_FT_COLLECT_GREGS) |
| return 0; |
| |
| return *(ULONGEST *) (raw_regs + x86_64_ft_collect_regmap[regnum]); |
| } |
| |
| #ifdef HAVE_UST |
| |
| #include <ust/processor.h> |
| |
| /* "struct registers" is the UST object type holding the registers at |
| the time of the static tracepoint marker call. This doesn't |
| contain RIP, but we know what it must have been (the marker |
| address). */ |
| |
| #define ST_REGENTRY(REG) \ |
| { \ |
| offsetof (struct registers, REG), \ |
| sizeof (((struct registers *) NULL)->REG) \ |
| } |
| |
| static struct |
| { |
| int offset; |
| int size; |
| } x86_64_st_collect_regmap[] = |
| { |
| ST_REGENTRY(rax), |
| ST_REGENTRY(rbx), |
| ST_REGENTRY(rcx), |
| ST_REGENTRY(rdx), |
| ST_REGENTRY(rsi), |
| ST_REGENTRY(rdi), |
| ST_REGENTRY(rbp), |
| ST_REGENTRY(rsp), |
| ST_REGENTRY(r8), |
| ST_REGENTRY(r9), |
| ST_REGENTRY(r10), |
| ST_REGENTRY(r11), |
| ST_REGENTRY(r12), |
| ST_REGENTRY(r13), |
| ST_REGENTRY(r14), |
| ST_REGENTRY(r15), |
| { -1, 0 }, |
| ST_REGENTRY(rflags), |
| ST_REGENTRY(cs), |
| ST_REGENTRY(ss), |
| }; |
| |
| #define X86_64_NUM_ST_COLLECT_GREGS \ |
| (sizeof (x86_64_st_collect_regmap) / sizeof (x86_64_st_collect_regmap[0])) |
| |
| /* GDB's RIP register number. */ |
| #define AMD64_RIP_REGNUM 16 |
| |
| void |
| supply_static_tracepoint_registers (struct regcache *regcache, |
| const unsigned char *buf, |
| CORE_ADDR pc) |
| { |
| int i; |
| unsigned long newpc = pc; |
| |
| supply_register (regcache, AMD64_RIP_REGNUM, &newpc); |
| |
| for (i = 0; i < X86_64_NUM_ST_COLLECT_GREGS; i++) |
| if (x86_64_st_collect_regmap[i].offset != -1) |
| { |
| switch (x86_64_st_collect_regmap[i].size) |
| { |
| case 8: |
| supply_register (regcache, i, |
| ((char *) buf) |
| + x86_64_st_collect_regmap[i].offset); |
| break; |
| case 2: |
| { |
| unsigned long reg |
| = * (short *) (((char *) buf) |
| + x86_64_st_collect_regmap[i].offset); |
| reg &= 0xffff; |
| supply_register (regcache, i, ®); |
| } |
| break; |
| default: |
| internal_error (__FILE__, __LINE__, |
| "unhandled register size: %d", |
| x86_64_st_collect_regmap[i].size); |
| break; |
| } |
| } |
| } |
| |
| #endif /* HAVE_UST */ |
| |
| void |
| initialize_low_tracepoint (void) |
| { |
| init_registers_amd64_linux (); |
| ipa_tdesc = tdesc_amd64_linux; |
| } |