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1f82754b JB |
1 | /* Native support code for PPC AIX, for GDB the GNU debugger. |
2 | ||
6aba47ca | 3 | Copyright (C) 2006, 2007 Free Software Foundation, Inc. |
1f82754b JB |
4 | |
5 | Free Software Foundation, Inc. | |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
1f82754b JB |
12 | (at your option) any later version. |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
1f82754b JB |
21 | |
22 | #include "defs.h" | |
7a61a01c | 23 | #include "gdb_string.h" |
1f82754b | 24 | #include "osabi.h" |
7a61a01c UW |
25 | #include "regcache.h" |
26 | #include "regset.h" | |
1f82754b | 27 | #include "rs6000-tdep.h" |
6f7f3f0d | 28 | #include "ppc-tdep.h" |
1f82754b | 29 | |
7a61a01c UW |
30 | |
31 | /* Core file support. */ | |
32 | ||
33 | static struct ppc_reg_offsets rs6000_aix32_reg_offsets = | |
34 | { | |
35 | /* General-purpose registers. */ | |
36 | 208, /* r0_offset */ | |
37 | 24, /* pc_offset */ | |
38 | 28, /* ps_offset */ | |
39 | 32, /* cr_offset */ | |
40 | 36, /* lr_offset */ | |
41 | 40, /* ctr_offset */ | |
42 | 44, /* xer_offset */ | |
43 | 48, /* mq_offset */ | |
44 | ||
45 | /* Floating-point registers. */ | |
46 | 336, /* f0_offset */ | |
47 | 56, /* fpscr_offset */ | |
48 | ||
49 | /* AltiVec registers. */ | |
50 | -1, /* vr0_offset */ | |
51 | -1, /* vscr_offset */ | |
52 | -1 /* vrsave_offset */ | |
53 | }; | |
54 | ||
55 | static struct ppc_reg_offsets rs6000_aix64_reg_offsets = | |
56 | { | |
57 | /* General-purpose registers. */ | |
58 | 0, /* r0_offset */ | |
59 | 264, /* pc_offset */ | |
60 | 256, /* ps_offset */ | |
61 | 288, /* cr_offset */ | |
62 | 272, /* lr_offset */ | |
63 | 280, /* ctr_offset */ | |
64 | 292, /* xer_offset */ | |
65 | -1, /* mq_offset */ | |
66 | ||
67 | /* Floating-point registers. */ | |
68 | 312, /* f0_offset */ | |
69 | 296, /* fpscr_offset */ | |
70 | ||
71 | /* AltiVec registers. */ | |
72 | -1, /* vr0_offset */ | |
73 | -1, /* vscr_offset */ | |
74 | -1 /* vrsave_offset */ | |
75 | }; | |
76 | ||
77 | ||
78 | /* Supply register REGNUM in the general-purpose register set REGSET | |
79 | from the buffer specified by GREGS and LEN to register cache | |
80 | REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ | |
81 | ||
82 | static void | |
83 | rs6000_aix_supply_regset (const struct regset *regset, | |
84 | struct regcache *regcache, int regnum, | |
85 | const void *gregs, size_t len) | |
86 | { | |
87 | ppc_supply_gregset (regset, regcache, regnum, gregs, len); | |
88 | ||
89 | if (ppc_floating_point_unit_p (get_regcache_arch (regcache))) | |
90 | ppc_supply_fpregset (regset, regcache, regnum, gregs, len); | |
91 | } | |
92 | ||
93 | /* Collect register REGNUM in the general-purpose register set | |
94 | REGSET. from register cache REGCACHE into the buffer specified by | |
95 | GREGS and LEN. If REGNUM is -1, do this for all registers in | |
96 | REGSET. */ | |
97 | ||
98 | static void | |
99 | rs6000_aix_collect_regset (const struct regset *regset, | |
100 | const struct regcache *regcache, int regnum, | |
101 | void *gregs, size_t len) | |
102 | { | |
103 | ppc_collect_gregset (regset, regcache, regnum, gregs, len); | |
104 | ||
105 | if (ppc_floating_point_unit_p (get_regcache_arch (regcache))) | |
106 | ppc_collect_fpregset (regset, regcache, regnum, gregs, len); | |
107 | } | |
108 | ||
109 | /* AIX register set. */ | |
110 | ||
111 | static struct regset rs6000_aix32_regset = | |
112 | { | |
113 | &rs6000_aix32_reg_offsets, | |
114 | rs6000_aix_supply_regset, | |
115 | rs6000_aix_collect_regset, | |
116 | }; | |
117 | ||
118 | static struct regset rs6000_aix64_regset = | |
119 | { | |
120 | &rs6000_aix64_reg_offsets, | |
121 | rs6000_aix_supply_regset, | |
122 | rs6000_aix_collect_regset, | |
123 | }; | |
124 | ||
125 | /* Return the appropriate register set for the core section identified | |
126 | by SECT_NAME and SECT_SIZE. */ | |
127 | ||
128 | static const struct regset * | |
129 | rs6000_aix_regset_from_core_section (struct gdbarch *gdbarch, | |
130 | const char *sect_name, size_t sect_size) | |
131 | { | |
132 | if (gdbarch_tdep (gdbarch)->wordsize == 4) | |
133 | { | |
134 | if (strcmp (sect_name, ".reg") == 0 && sect_size >= 592) | |
135 | return &rs6000_aix32_regset; | |
136 | } | |
137 | else | |
138 | { | |
139 | if (strcmp (sect_name, ".reg") == 0 && sect_size >= 576) | |
140 | return &rs6000_aix64_regset; | |
141 | } | |
142 | ||
143 | return NULL; | |
144 | } | |
145 | ||
146 | ||
1f82754b JB |
147 | static enum gdb_osabi |
148 | rs6000_aix_osabi_sniffer (bfd *abfd) | |
149 | { | |
150 | ||
151 | if (bfd_get_flavour (abfd) == bfd_target_xcoff_flavour); | |
152 | return GDB_OSABI_AIX; | |
153 | ||
154 | return GDB_OSABI_UNKNOWN; | |
155 | } | |
156 | ||
157 | static void | |
158 | rs6000_aix_init_osabi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
159 | { | |
160 | /* RS6000/AIX does not support PT_STEP. Has to be simulated. */ | |
161 | set_gdbarch_software_single_step (gdbarch, rs6000_software_single_step); | |
6f7f3f0d | 162 | |
7a61a01c UW |
163 | /* Core file support. */ |
164 | set_gdbarch_regset_from_core_section | |
165 | (gdbarch, rs6000_aix_regset_from_core_section); | |
166 | ||
6f7f3f0d UW |
167 | /* Minimum possible text address in AIX. */ |
168 | gdbarch_tdep (gdbarch)->text_segment_base = 0x10000000; | |
1f82754b JB |
169 | } |
170 | ||
171 | void | |
172 | _initialize_rs6000_aix_tdep (void) | |
173 | { | |
174 | gdbarch_register_osabi_sniffer (bfd_arch_rs6000, | |
175 | bfd_target_xcoff_flavour, | |
176 | rs6000_aix_osabi_sniffer); | |
7a61a01c UW |
177 | gdbarch_register_osabi_sniffer (bfd_arch_powerpc, |
178 | bfd_target_xcoff_flavour, | |
179 | rs6000_aix_osabi_sniffer); | |
1f82754b JB |
180 | |
181 | gdbarch_register_osabi (bfd_arch_rs6000, 0, GDB_OSABI_AIX, | |
182 | rs6000_aix_init_osabi); | |
7a61a01c UW |
183 | gdbarch_register_osabi (bfd_arch_powerpc, 0, GDB_OSABI_AIX, |
184 | rs6000_aix_init_osabi); | |
1f82754b JB |
185 | } |
186 |