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d195bc9f MK |
1 | /* Target-dependent code for OpenBSD/powerpc. |
2 | ||
3 | Copyright 2004 Free Software Foundation, Inc. | |
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 2 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, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include "arch-utils.h" | |
24 | #include "osabi.h" | |
25 | #include "regcache.h" | |
26 | #include "regset.h" | |
27 | ||
28 | #include "gdb_string.h" | |
29 | ||
30 | #include "ppc-tdep.h" | |
31 | #include "ppcobsd-tdep.h" | |
32 | #include "solib-svr4.h" | |
33 | ||
34 | /* Register offsets from <machine/reg.h>. */ | |
35 | struct ppc_reg_offsets ppcobsd_reg_offsets; | |
36 | \f | |
37 | ||
38 | /* Core file support. */ | |
39 | ||
40 | /* Supply register REGNUM in the general-purpose register set REGSET | |
41 | from the buffer specified by GREGS and LEN to register cache | |
42 | REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ | |
43 | ||
44 | void | |
45 | ppcobsd_supply_gregset (const struct regset *regset, | |
46 | struct regcache *regcache, int regnum, | |
47 | const void *gregs, size_t len) | |
48 | { | |
49 | ppc_supply_gregset (regset, regcache, regnum, gregs, len); | |
50 | ppc_supply_fpregset (regset, regcache, regnum, gregs, len); | |
51 | } | |
52 | ||
53 | /* Collect register REGNUM in the general-purpose register set | |
54 | REGSET. from register cache REGCACHE into the buffer specified by | |
55 | GREGS and LEN. If REGNUM is -1, do this for all registers in | |
56 | REGSET. */ | |
57 | ||
58 | void | |
59 | ppcobsd_collect_gregset (const struct regset *regset, | |
60 | const struct regcache *regcache, int regnum, | |
61 | void *gregs, size_t len) | |
62 | { | |
63 | ppc_collect_gregset (regset, regcache, regnum, gregs, len); | |
64 | ppc_collect_fpregset (regset, regcache, regnum, gregs, len); | |
65 | } | |
66 | ||
67 | /* OpenBS/powerpc register set. */ | |
68 | ||
69 | struct regset ppcobsd_gregset = | |
70 | { | |
71 | &ppcobsd_reg_offsets, | |
72 | ppcobsd_supply_gregset | |
73 | }; | |
74 | ||
75 | /* Return the appropriate register set for the core section identified | |
76 | by SECT_NAME and SECT_SIZE. */ | |
77 | ||
78 | static const struct regset * | |
79 | ppcobsd_regset_from_core_section (struct gdbarch *gdbarch, | |
80 | const char *sect_name, size_t sect_size) | |
81 | { | |
82 | if (strcmp (sect_name, ".reg") == 0 && sect_size >= 412) | |
83 | return &ppcobsd_gregset; | |
84 | ||
85 | return NULL; | |
86 | } | |
87 | \f | |
88 | ||
89 | static void | |
90 | ppcobsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
91 | { | |
92 | /* OpenBSD uses SVR4-style shared libraries. */ | |
93 | set_gdbarch_in_solib_call_trampoline | |
94 | (gdbarch, generic_in_solib_call_trampoline); | |
95 | set_solib_svr4_fetch_link_map_offsets | |
96 | (gdbarch, svr4_ilp32_fetch_link_map_offsets); | |
97 | ||
98 | set_gdbarch_regset_from_core_section | |
99 | (gdbarch, ppcobsd_regset_from_core_section); | |
100 | } | |
101 | \f | |
102 | ||
103 | /* OpenBSD uses uses the traditional NetBSD core file format, even for | |
104 | ports that use ELF. */ | |
105 | #define GDB_OSABI_NETBSD_CORE GDB_OSABI_OPENBSD_ELF | |
106 | ||
107 | static enum gdb_osabi | |
108 | ppcobsd_core_osabi_sniffer (bfd *abfd) | |
109 | { | |
110 | if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0) | |
111 | return GDB_OSABI_NETBSD_CORE; | |
112 | ||
113 | return GDB_OSABI_UNKNOWN; | |
114 | } | |
115 | \f | |
116 | ||
117 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
118 | void _initialize_ppcobsd_tdep (void); | |
119 | ||
120 | void | |
121 | _initialize_ppcobsd_tdep (void) | |
122 | { | |
123 | /* BFD doesn't set a flavour for NetBSD style a.out core files. */ | |
124 | gdbarch_register_osabi_sniffer (bfd_arch_powerpc, bfd_target_unknown_flavour, | |
125 | ppcobsd_core_osabi_sniffer); | |
126 | ||
127 | gdbarch_register_osabi (bfd_arch_powerpc, 0, GDB_OSABI_OPENBSD_ELF, | |
128 | ppcobsd_init_abi); | |
129 | ||
130 | /* Avoid initializing the register offsets again if they were | |
131 | already initailized by ppcobsd-nat.c. */ | |
132 | if (ppcobsd_reg_offsets.pc_offset == 0) | |
133 | { | |
134 | /* General-purpose registers. */ | |
135 | ppcobsd_reg_offsets.r0_offset = 0; | |
136 | ppcobsd_reg_offsets.pc_offset = 384; | |
137 | ppcobsd_reg_offsets.ps_offset = 388; | |
138 | ppcobsd_reg_offsets.cr_offset = 392; | |
139 | ppcobsd_reg_offsets.lr_offset = 396; | |
140 | ppcobsd_reg_offsets.ctr_offset = 400; | |
141 | ppcobsd_reg_offsets.xer_offset = 404; | |
142 | ppcobsd_reg_offsets.mq_offset = 408; | |
143 | ||
144 | /* Floating-point registers. */ | |
145 | ppcobsd_reg_offsets.f0_offset = 128; | |
146 | ppcobsd_reg_offsets.fpscr_offset = -1; | |
147 | ||
148 | /* AltiVec registers. */ | |
149 | ppcobsd_reg_offsets.vr0_offset = 0; | |
150 | ppcobsd_reg_offsets.vscr_offset = 512; | |
151 | ppcobsd_reg_offsets.vrsave_offset = 520; | |
152 | } | |
153 | } |