| 1 | /* GNU/Linux/AArch64 specific low level interface, for the in-process |
| 2 | agent library for GDB. |
| 3 | |
| 4 | Copyright (C) 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 aarch64.c. */ |
| 25 | void init_registers_aarch64 (void); |
| 26 | extern const struct target_desc *tdesc_aarch64; |
| 27 | |
| 28 | /* Each register saved by the jump pad is in a 16 byte cell. */ |
| 29 | #define FT_CR_SIZE 16 |
| 30 | |
| 31 | #define FT_CR_FPCR 0 |
| 32 | #define FT_CR_FPSR 1 |
| 33 | #define FT_CR_CPSR 2 |
| 34 | #define FT_CR_PC 3 |
| 35 | #define FT_CR_SP 4 |
| 36 | #define FT_CR_X0 5 |
| 37 | #define FT_CR_GPR(n) (FT_CR_X0 + (n)) |
| 38 | #define FT_CR_FPR(n) (FT_CR_GPR (31) + (n)) |
| 39 | |
| 40 | /* Mapping between registers collected by the jump pad and GDB's register |
| 41 | array layout used by regcache. |
| 42 | |
| 43 | See linux-aarch64-low.c (aarch64_install_fast_tracepoint_jump_pad) for |
| 44 | more details. */ |
| 45 | |
| 46 | static const int aarch64_ft_collect_regmap[] = { |
| 47 | FT_CR_GPR (0), |
| 48 | FT_CR_GPR (1), |
| 49 | FT_CR_GPR (2), |
| 50 | FT_CR_GPR (3), |
| 51 | FT_CR_GPR (4), |
| 52 | FT_CR_GPR (5), |
| 53 | FT_CR_GPR (6), |
| 54 | FT_CR_GPR (7), |
| 55 | FT_CR_GPR (8), |
| 56 | FT_CR_GPR (9), |
| 57 | FT_CR_GPR (10), |
| 58 | FT_CR_GPR (11), |
| 59 | FT_CR_GPR (12), |
| 60 | FT_CR_GPR (13), |
| 61 | FT_CR_GPR (14), |
| 62 | FT_CR_GPR (15), |
| 63 | FT_CR_GPR (16), |
| 64 | FT_CR_GPR (17), |
| 65 | FT_CR_GPR (18), |
| 66 | FT_CR_GPR (19), |
| 67 | FT_CR_GPR (20), |
| 68 | FT_CR_GPR (21), |
| 69 | FT_CR_GPR (22), |
| 70 | FT_CR_GPR (23), |
| 71 | FT_CR_GPR (24), |
| 72 | FT_CR_GPR (25), |
| 73 | FT_CR_GPR (26), |
| 74 | FT_CR_GPR (27), |
| 75 | FT_CR_GPR (28), |
| 76 | /* FP */ |
| 77 | FT_CR_GPR (29), |
| 78 | /* LR */ |
| 79 | FT_CR_GPR (30), |
| 80 | FT_CR_SP, |
| 81 | FT_CR_PC, |
| 82 | FT_CR_CPSR, |
| 83 | FT_CR_FPR (0), |
| 84 | FT_CR_FPR (1), |
| 85 | FT_CR_FPR (2), |
| 86 | FT_CR_FPR (3), |
| 87 | FT_CR_FPR (4), |
| 88 | FT_CR_FPR (5), |
| 89 | FT_CR_FPR (6), |
| 90 | FT_CR_FPR (7), |
| 91 | FT_CR_FPR (8), |
| 92 | FT_CR_FPR (9), |
| 93 | FT_CR_FPR (10), |
| 94 | FT_CR_FPR (11), |
| 95 | FT_CR_FPR (12), |
| 96 | FT_CR_FPR (13), |
| 97 | FT_CR_FPR (14), |
| 98 | FT_CR_FPR (15), |
| 99 | FT_CR_FPR (16), |
| 100 | FT_CR_FPR (17), |
| 101 | FT_CR_FPR (18), |
| 102 | FT_CR_FPR (19), |
| 103 | FT_CR_FPR (20), |
| 104 | FT_CR_FPR (21), |
| 105 | FT_CR_FPR (22), |
| 106 | FT_CR_FPR (23), |
| 107 | FT_CR_FPR (24), |
| 108 | FT_CR_FPR (25), |
| 109 | FT_CR_FPR (26), |
| 110 | FT_CR_FPR (27), |
| 111 | FT_CR_FPR (28), |
| 112 | FT_CR_FPR (29), |
| 113 | FT_CR_FPR (30), |
| 114 | FT_CR_FPR (31), |
| 115 | FT_CR_FPSR, |
| 116 | FT_CR_FPCR |
| 117 | }; |
| 118 | |
| 119 | #define AARCH64_NUM_FT_COLLECT_GREGS \ |
| 120 | (sizeof (aarch64_ft_collect_regmap) / sizeof(aarch64_ft_collect_regmap[0])) |
| 121 | |
| 122 | /* Fill in REGCACHE with registers saved by the jump pad in BUF. */ |
| 123 | |
| 124 | void |
| 125 | supply_fast_tracepoint_registers (struct regcache *regcache, |
| 126 | const unsigned char *buf) |
| 127 | { |
| 128 | int i; |
| 129 | |
| 130 | for (i = 0; i < AARCH64_NUM_FT_COLLECT_GREGS; i++) |
| 131 | supply_register (regcache, i, |
| 132 | ((char *) buf) |
| 133 | + (aarch64_ft_collect_regmap[i] * FT_CR_SIZE)); |
| 134 | } |
| 135 | |
| 136 | IP_AGENT_EXPORT_FUNC ULONGEST |
| 137 | gdb_agent_get_raw_reg (const unsigned char *raw_regs, int regnum) |
| 138 | { |
| 139 | if (regnum >= AARCH64_NUM_FT_COLLECT_GREGS) |
| 140 | return 0; |
| 141 | |
| 142 | return *(ULONGEST *) (raw_regs |
| 143 | + aarch64_ft_collect_regmap[regnum] * FT_CR_SIZE); |
| 144 | } |
| 145 | |
| 146 | void |
| 147 | initialize_low_tracepoint (void) |
| 148 | { |
| 149 | init_registers_aarch64 (); |
| 150 | ipa_tdesc = tdesc_aarch64; |
| 151 | } |