Commit | Line | Data |
---|---|---|
bb903df0 PL |
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 | } |