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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 | ||
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 | }; |