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65f479b6 PA |
1 | /* GNU/Linux/TILE-Gx specific low level interface, GDBserver. |
2 | ||
28e7fd62 | 3 | Copyright (C) 2012-2013 Free Software Foundation, Inc. |
65f479b6 PA |
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 | ||
e1f58301 | 23 | #include <arch/abi.h> |
65f479b6 PA |
24 | #include <sys/ptrace.h> |
25 | ||
e1f58301 JW |
26 | /* Defined in auto-generated file reg-tilegx.c. */ |
27 | void init_registers_tilegx (void); | |
28 | /* Defined in auto-generated file reg-tilegx32.c. */ | |
29 | void init_registers_tilegx32 (void); | |
65f479b6 PA |
30 | |
31 | #define tile_num_regs 65 | |
32 | ||
33 | static int tile_regmap[] = | |
34 | { | |
35 | 0, 1, 2, 3, 4, 5, 6, 7, | |
36 | 8, 9, 10, 11, 12, 13, 14, 15, | |
37 | 16, 17, 18, 19, 20, 21, 22, 23, | |
38 | 24, 25, 26, 27, 28, 29, 30, 31, | |
39 | 32, 33, 34, 35, 36, 37, 38, 39, | |
40 | 40, 41, 42, 43, 44, 45, 46, 47, | |
41 | 48, 49, 50, 51, 52, 53, 54, 55, | |
42 | -1, -1, -1, -1, -1, -1, -1, -1, | |
43 | 56 | |
44 | }; | |
45 | ||
46 | static int | |
47 | tile_cannot_fetch_register (int regno) | |
48 | { | |
49 | if (regno >= 0 && regno < 56) | |
50 | return 0; | |
51 | else if (regno == 64) | |
52 | return 0; | |
53 | else | |
54 | return 1; | |
55 | } | |
56 | ||
57 | static int | |
58 | tile_cannot_store_register (int regno) | |
59 | { | |
60 | if (regno >= 0 && regno < 56) | |
61 | return 0; | |
62 | else if (regno == 64) | |
63 | return 0; | |
64 | else | |
65 | return 1; | |
66 | } | |
67 | ||
68 | static CORE_ADDR | |
69 | tile_get_pc (struct regcache *regcache) | |
70 | { | |
71 | unsigned long pc; | |
72 | ||
73 | collect_register_by_name (regcache, "pc", &pc); | |
74 | return pc; | |
75 | } | |
76 | ||
77 | static void | |
78 | tile_set_pc (struct regcache *regcache, CORE_ADDR pc) | |
79 | { | |
80 | unsigned long newpc = pc; | |
81 | ||
82 | supply_register_by_name (regcache, "pc", &newpc); | |
83 | } | |
84 | ||
85 | static uint64_t tile_breakpoint = 0x400b3cae70166000ULL; | |
86 | #define tile_breakpoint_len 8 | |
87 | ||
88 | static int | |
89 | tile_breakpoint_at (CORE_ADDR where) | |
90 | { | |
91 | uint64_t insn; | |
92 | ||
93 | (*the_target->read_memory) (where, (unsigned char *) &insn, 8); | |
94 | if (insn == tile_breakpoint) | |
95 | return 1; | |
96 | ||
97 | /* If necessary, recognize more trap instructions here. GDB only uses the | |
98 | one. */ | |
99 | return 0; | |
100 | } | |
101 | ||
102 | static void | |
103 | tile_fill_gregset (struct regcache *regcache, void *buf) | |
104 | { | |
105 | int i; | |
106 | ||
107 | for (i = 0; i < tile_num_regs; i++) | |
108 | if (tile_regmap[i] != -1) | |
e1f58301 | 109 | collect_register (regcache, i, ((uint_reg_t *) buf) + tile_regmap[i]); |
65f479b6 PA |
110 | } |
111 | ||
112 | static void | |
113 | tile_store_gregset (struct regcache *regcache, const void *buf) | |
114 | { | |
115 | int i; | |
116 | ||
117 | for (i = 0; i < tile_num_regs; i++) | |
118 | if (tile_regmap[i] != -1) | |
e1f58301 | 119 | supply_register (regcache, i, ((uint_reg_t *) buf) + tile_regmap[i]); |
65f479b6 PA |
120 | } |
121 | ||
122 | struct regset_info target_regsets[] = | |
123 | { | |
124 | { PTRACE_GETREGS, PTRACE_SETREGS, 0, tile_num_regs * 4, | |
125 | GENERAL_REGS, tile_fill_gregset, tile_store_gregset }, | |
126 | { 0, 0, 0, -1, -1, NULL, NULL } | |
127 | }; | |
128 | ||
e1f58301 JW |
129 | static void |
130 | tile_arch_setup (void) | |
131 | { | |
132 | int pid = pid_of (get_thread_lwp (current_inferior)); | |
133 | unsigned int machine; | |
134 | int is_elf64 = linux_pid_exe_is_elf_64_file (pid, &machine); | |
135 | ||
136 | if (sizeof (void *) == 4) | |
137 | if (is_elf64 > 0) | |
138 | error (_("Can't debug 64-bit process with 32-bit GDBserver")); | |
139 | ||
140 | if (!is_elf64) | |
141 | init_registers_tilegx32(); | |
142 | else | |
143 | init_registers_tilegx(); | |
144 | } | |
145 | ||
146 | ||
65f479b6 PA |
147 | struct linux_target_ops the_low_target = |
148 | { | |
e1f58301 | 149 | tile_arch_setup, |
65f479b6 PA |
150 | tile_num_regs, |
151 | tile_regmap, | |
152 | NULL, | |
153 | tile_cannot_fetch_register, | |
154 | tile_cannot_store_register, | |
155 | NULL, | |
156 | tile_get_pc, | |
157 | tile_set_pc, | |
158 | (const unsigned char *) &tile_breakpoint, | |
159 | tile_breakpoint_len, | |
160 | NULL, | |
161 | 0, | |
162 | tile_breakpoint_at, | |
163 | }; |