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0a30fbc4 DJ |
1 | /* GNU/Linux/PowerPC specific low level interface, for the remote server for |
2 | GDB. | |
6aba47ca | 3 | Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2005, 2007 |
0a30fbc4 DJ |
4 | 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 | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
0a30fbc4 DJ |
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 | |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
0a30fbc4 DJ |
20 | |
21 | #include "server.h" | |
58caa3dc | 22 | #include "linux-low.h" |
0a30fbc4 DJ |
23 | |
24 | #include <asm/ptrace.h> | |
25 | ||
2ec06d2e | 26 | #define ppc_num_regs 71 |
0a30fbc4 DJ |
27 | |
28 | /* Currently, don't check/send MQ. */ | |
2ec06d2e | 29 | static int ppc_regmap[] = |
0a30fbc4 DJ |
30 | {PT_R0 * 4, PT_R1 * 4, PT_R2 * 4, PT_R3 * 4, |
31 | PT_R4 * 4, PT_R5 * 4, PT_R6 * 4, PT_R7 * 4, | |
32 | PT_R8 * 4, PT_R9 * 4, PT_R10 * 4, PT_R11 * 4, | |
33 | PT_R12 * 4, PT_R13 * 4, PT_R14 * 4, PT_R15 * 4, | |
34 | PT_R16 * 4, PT_R17 * 4, PT_R18 * 4, PT_R19 * 4, | |
35 | PT_R20 * 4, PT_R21 * 4, PT_R22 * 4, PT_R23 * 4, | |
36 | PT_R24 * 4, PT_R25 * 4, PT_R26 * 4, PT_R27 * 4, | |
37 | PT_R28 * 4, PT_R29 * 4, PT_R30 * 4, PT_R31 * 4, | |
30ed0a8f DJ |
38 | #ifdef __SPE__ |
39 | -1, -1, -1, -1, | |
40 | -1, -1, -1, -1, | |
41 | -1, -1, -1, -1, | |
42 | -1, -1, -1, -1, | |
43 | -1, -1, -1, -1, | |
44 | -1, -1, -1, -1, | |
45 | -1, -1, -1, -1, | |
46 | -1, -1, -1, -1, | |
47 | #else | |
0a30fbc4 DJ |
48 | PT_FPR0*4, PT_FPR0*4 + 8, PT_FPR0*4+16, PT_FPR0*4+24, |
49 | PT_FPR0*4+32, PT_FPR0*4+40, PT_FPR0*4+48, PT_FPR0*4+56, | |
50 | PT_FPR0*4+64, PT_FPR0*4+72, PT_FPR0*4+80, PT_FPR0*4+88, | |
51 | PT_FPR0*4+96, PT_FPR0*4+104, PT_FPR0*4+112, PT_FPR0*4+120, | |
52 | PT_FPR0*4+128, PT_FPR0*4+136, PT_FPR0*4+144, PT_FPR0*4+152, | |
53 | PT_FPR0*4+160, PT_FPR0*4+168, PT_FPR0*4+176, PT_FPR0*4+184, | |
54 | PT_FPR0*4+192, PT_FPR0*4+200, PT_FPR0*4+208, PT_FPR0*4+216, | |
55 | PT_FPR0*4+224, PT_FPR0*4+232, PT_FPR0*4+240, PT_FPR0*4+248, | |
30ed0a8f | 56 | #endif |
0a30fbc4 | 57 | PT_NIP * 4, PT_MSR * 4, PT_CCR * 4, PT_LNK * 4, |
30ed0a8f DJ |
58 | #ifdef __SPE__ |
59 | PT_CTR * 4, PT_XER * 4, -1 | |
60 | #else | |
61 | PT_CTR * 4, PT_XER * 4, PT_FPSCR * 4 | |
62 | #endif | |
63 | }; | |
0a30fbc4 | 64 | |
2ec06d2e DJ |
65 | static int |
66 | ppc_cannot_store_register (int regno) | |
0a30fbc4 | 67 | { |
30ed0a8f | 68 | #ifndef __SPE__ |
bc1e36ca DJ |
69 | /* Some kernels do not allow us to store fpscr. */ |
70 | if (regno == find_regno ("fpscr")) | |
71 | return 2; | |
30ed0a8f | 72 | #endif |
bc1e36ca | 73 | |
0a30fbc4 DJ |
74 | return 0; |
75 | } | |
76 | ||
2ec06d2e DJ |
77 | static int |
78 | ppc_cannot_fetch_register (int regno) | |
0a30fbc4 DJ |
79 | { |
80 | return 0; | |
81 | } | |
82 | ||
0d62e5e8 DJ |
83 | static CORE_ADDR |
84 | ppc_get_pc (void) | |
85 | { | |
86 | unsigned long pc; | |
87 | ||
88 | collect_register_by_name ("pc", &pc); | |
89 | return (CORE_ADDR) pc; | |
90 | } | |
91 | ||
92 | static void | |
93 | ppc_set_pc (CORE_ADDR pc) | |
94 | { | |
95 | unsigned long newpc = pc; | |
96 | ||
97 | supply_register_by_name ("pc", &newpc); | |
98 | } | |
99 | ||
100 | /* Correct in either endianness. Note that this file is | |
101 | for PowerPC only, not PowerPC64. | |
102 | This instruction is "twge r2, r2", which GDB uses as a software | |
103 | breakpoint. */ | |
104 | static const unsigned long ppc_breakpoint = 0x7d821008; | |
105 | #define ppc_breakpoint_len 4 | |
106 | ||
107 | static int | |
108 | ppc_breakpoint_at (CORE_ADDR where) | |
109 | { | |
110 | unsigned long insn; | |
111 | ||
f450004a | 112 | (*the_target->read_memory) (where, (unsigned char *) &insn, 4); |
0d62e5e8 DJ |
113 | if (insn == ppc_breakpoint) |
114 | return 1; | |
115 | /* If necessary, recognize more trap instructions here. GDB only uses the | |
116 | one. */ | |
117 | return 0; | |
118 | } | |
119 | ||
e9d25b98 DJ |
120 | /* Provide only a fill function for the general register set. ps_lgetregs |
121 | will use this for NPTL support. */ | |
122 | ||
123 | static void ppc_fill_gregset (void *buf) | |
124 | { | |
125 | int i; | |
126 | ||
127 | for (i = 0; i < 32; i++) | |
128 | collect_register (i, (char *) buf + ppc_regmap[i]); | |
129 | ||
130 | for (i = 64; i < 70; i++) | |
131 | collect_register (i, (char *) buf + ppc_regmap[i]); | |
132 | } | |
133 | ||
30ed0a8f DJ |
134 | #ifdef __ALTIVEC__ |
135 | ||
136 | #ifndef PTRACE_GETVRREGS | |
137 | #define PTRACE_GETVRREGS 18 | |
138 | #define PTRACE_SETVRREGS 19 | |
139 | #endif | |
140 | ||
141 | #define SIZEOF_VRREGS 33*16+4 | |
142 | ||
143 | static void | |
144 | ppc_fill_vrregset (void *buf) | |
145 | { | |
146 | int i, base; | |
147 | char *regset = buf; | |
148 | ||
149 | base = find_regno ("vr0"); | |
150 | for (i = 0; i < 32; i++) | |
151 | collect_register (base + i, ®set[i * 16]); | |
152 | ||
153 | collect_register_by_name ("vscr", ®set[32 * 16 + 12]); | |
154 | collect_register_by_name ("vrsave", ®set[33 * 16]); | |
155 | } | |
156 | ||
157 | static void | |
158 | ppc_store_vrregset (const void *buf) | |
159 | { | |
160 | int i, base; | |
161 | const char *regset = buf; | |
162 | ||
163 | base = find_regno ("vr0"); | |
164 | for (i = 0; i < 32; i++) | |
165 | supply_register (base + i, ®set[i * 16]); | |
166 | ||
167 | supply_register_by_name ("vscr", ®set[32 * 16 + 12]); | |
168 | supply_register_by_name ("vrsave", ®set[33 * 16]); | |
169 | } | |
170 | ||
171 | #endif /* __ALTIVEC__ */ | |
172 | ||
173 | #ifdef __SPE__ | |
174 | ||
175 | #ifndef PTRACE_GETEVRREGS | |
176 | #define PTRACE_GETEVRREGS 20 | |
177 | #define PTRACE_SETEVRREGS 21 | |
178 | #endif | |
179 | ||
180 | struct gdb_evrregset_t | |
181 | { | |
182 | unsigned long evr[32]; | |
183 | unsigned long long acc; | |
184 | unsigned long spefscr; | |
185 | }; | |
186 | ||
187 | static void | |
188 | ppc_fill_evrregset (void *buf) | |
189 | { | |
190 | int i, ev0; | |
191 | struct gdb_evrregset_t *regset = buf; | |
192 | ||
193 | ev0 = find_regno ("ev0h"); | |
194 | for (i = 0; i < 32; i++) | |
195 | collect_register (ev0 + i, ®set->evr[i]); | |
196 | ||
197 | collect_register_by_name ("acc", ®set->acc); | |
198 | collect_register_by_name ("spefscr", ®set->spefscr); | |
199 | } | |
200 | ||
201 | static void | |
202 | ppc_store_evrregset (const void *buf) | |
203 | { | |
204 | int i, ev0; | |
205 | const struct gdb_evrregset_t *regset = buf; | |
206 | ||
207 | ev0 = find_regno ("ev0h"); | |
208 | for (i = 0; i < 32; i++) | |
209 | supply_register (ev0 + i, ®set->evr[i]); | |
210 | ||
211 | supply_register_by_name ("acc", ®set->acc); | |
212 | supply_register_by_name ("spefscr", ®set->spefscr); | |
213 | } | |
214 | #endif /* __SPE__ */ | |
215 | ||
e9d25b98 | 216 | struct regset_info target_regsets[] = { |
30ed0a8f DJ |
217 | /* List the extra register sets before GENERAL_REGS. That way we will |
218 | fetch them every time, but still fall back to PTRACE_PEEKUSER for the | |
219 | general registers. Some kernels support these, but not the newer | |
220 | PPC_PTRACE_GETREGS. */ | |
221 | #ifdef __ALTIVEC__ | |
222 | { PTRACE_GETVRREGS, PTRACE_SETVRREGS, SIZEOF_VRREGS, EXTENDED_REGS, | |
223 | ppc_fill_vrregset, ppc_store_vrregset }, | |
224 | #endif | |
225 | #ifdef __SPE__ | |
226 | { PTRACE_GETEVRREGS, PTRACE_SETEVRREGS, 32 * 4 + 8 + 4, EXTENDED_REGS, | |
227 | ppc_fill_evrregset, ppc_store_evrregset }, | |
228 | #endif | |
e9d25b98 DJ |
229 | { 0, 0, 0, GENERAL_REGS, ppc_fill_gregset, NULL }, |
230 | { 0, 0, -1, -1, NULL, NULL } | |
231 | }; | |
232 | ||
2ec06d2e DJ |
233 | struct linux_target_ops the_low_target = { |
234 | ppc_num_regs, | |
235 | ppc_regmap, | |
236 | ppc_cannot_fetch_register, | |
237 | ppc_cannot_store_register, | |
0d62e5e8 DJ |
238 | ppc_get_pc, |
239 | ppc_set_pc, | |
f450004a | 240 | (const unsigned char *) &ppc_breakpoint, |
0d62e5e8 DJ |
241 | ppc_breakpoint_len, |
242 | NULL, | |
243 | 0, | |
244 | ppc_breakpoint_at, | |
2ec06d2e | 245 | }; |