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| 1 /* GNU/Linux/TILE-Gx specific low level interface, GDBserver. |
| 2 |
| 3 Copyright (C) 2012 Free Software Foundation, Inc. |
| 4 |
| 5 This file is part of GDB. |
| 6 |
| 7 This program is free software; you can redistribute it and/or modify |
| 8 it under the terms of the GNU General Public License as published by |
| 9 the Free Software Foundation; either version 3 of the License, or |
| 10 (at your option) any later version. |
| 11 |
| 12 This program is distributed in the hope that it will be useful, |
| 13 but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 GNU General Public License for more details. |
| 16 |
| 17 You should have received a copy of the GNU General Public License |
| 18 along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 |
| 20 #include "server.h" |
| 21 #include "linux-low.h" |
| 22 |
| 23 #include <sys/ptrace.h> |
| 24 |
| 25 /* Defined in auto-generated file reg-tile.c. */ |
| 26 void init_registers_tile (void); |
| 27 |
| 28 #define tile_num_regs 65 |
| 29 |
| 30 static int tile_regmap[] = |
| 31 { |
| 32 0, 1, 2, 3, 4, 5, 6, 7, |
| 33 8, 9, 10, 11, 12, 13, 14, 15, |
| 34 16, 17, 18, 19, 20, 21, 22, 23, |
| 35 24, 25, 26, 27, 28, 29, 30, 31, |
| 36 32, 33, 34, 35, 36, 37, 38, 39, |
| 37 40, 41, 42, 43, 44, 45, 46, 47, |
| 38 48, 49, 50, 51, 52, 53, 54, 55, |
| 39 -1, -1, -1, -1, -1, -1, -1, -1, |
| 40 56 |
| 41 }; |
| 42 |
| 43 static int |
| 44 tile_cannot_fetch_register (int regno) |
| 45 { |
| 46 if (regno >= 0 && regno < 56) |
| 47 return 0; |
| 48 else if (regno == 64) |
| 49 return 0; |
| 50 else |
| 51 return 1; |
| 52 } |
| 53 |
| 54 static int |
| 55 tile_cannot_store_register (int regno) |
| 56 { |
| 57 if (regno >= 0 && regno < 56) |
| 58 return 0; |
| 59 else if (regno == 64) |
| 60 return 0; |
| 61 else |
| 62 return 1; |
| 63 } |
| 64 |
| 65 static CORE_ADDR |
| 66 tile_get_pc (struct regcache *regcache) |
| 67 { |
| 68 unsigned long pc; |
| 69 |
| 70 collect_register_by_name (regcache, "pc", &pc); |
| 71 return pc; |
| 72 } |
| 73 |
| 74 static void |
| 75 tile_set_pc (struct regcache *regcache, CORE_ADDR pc) |
| 76 { |
| 77 unsigned long newpc = pc; |
| 78 |
| 79 supply_register_by_name (regcache, "pc", &newpc); |
| 80 } |
| 81 |
| 82 static uint64_t tile_breakpoint = 0x400b3cae70166000ULL; |
| 83 #define tile_breakpoint_len 8 |
| 84 |
| 85 static int |
| 86 tile_breakpoint_at (CORE_ADDR where) |
| 87 { |
| 88 uint64_t insn; |
| 89 |
| 90 (*the_target->read_memory) (where, (unsigned char *) &insn, 8); |
| 91 if (insn == tile_breakpoint) |
| 92 return 1; |
| 93 |
| 94 /* If necessary, recognize more trap instructions here. GDB only uses the |
| 95 one. */ |
| 96 return 0; |
| 97 } |
| 98 |
| 99 static void |
| 100 tile_fill_gregset (struct regcache *regcache, void *buf) |
| 101 { |
| 102 int i; |
| 103 |
| 104 for (i = 0; i < tile_num_regs; i++) |
| 105 if (tile_regmap[i] != -1) |
| 106 collect_register (regcache, i, ((unsigned int *) buf) + tile_regmap[i]); |
| 107 } |
| 108 |
| 109 static void |
| 110 tile_store_gregset (struct regcache *regcache, const void *buf) |
| 111 { |
| 112 int i; |
| 113 |
| 114 for (i = 0; i < tile_num_regs; i++) |
| 115 if (tile_regmap[i] != -1) |
| 116 supply_register (regcache, i, ((unsigned long *) buf) + tile_regmap[i]); |
| 117 } |
| 118 |
| 119 struct regset_info target_regsets[] = |
| 120 { |
| 121 { PTRACE_GETREGS, PTRACE_SETREGS, 0, tile_num_regs * 4, |
| 122 GENERAL_REGS, tile_fill_gregset, tile_store_gregset }, |
| 123 { 0, 0, 0, -1, -1, NULL, NULL } |
| 124 }; |
| 125 |
| 126 struct linux_target_ops the_low_target = |
| 127 { |
| 128 init_registers_tile, |
| 129 tile_num_regs, |
| 130 tile_regmap, |
| 131 NULL, |
| 132 tile_cannot_fetch_register, |
| 133 tile_cannot_store_register, |
| 134 NULL, |
| 135 tile_get_pc, |
| 136 tile_set_pc, |
| 137 (const unsigned char *) &tile_breakpoint, |
| 138 tile_breakpoint_len, |
| 139 NULL, |
| 140 0, |
| 141 tile_breakpoint_at, |
| 142 }; |
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