Commit | Line | Data |
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def18405 | 1 | /* Target-dependent code for NetBSD/powerpc. |
476be15e | 2 | |
6aba47ca DJ |
3 | Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 |
4 | Free Software Foundation, Inc. | |
476be15e | 5 | |
485721b1 JT |
6 | Contributed by Wasabi Systems, Inc. |
7 | ||
8 | This file is part of GDB. | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program; if not, write to the Free Software | |
197e01b6 EZ |
22 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
23 | Boston, MA 02110-1301, USA. */ | |
485721b1 JT |
24 | |
25 | #include "defs.h" | |
def18405 | 26 | #include "gdbtypes.h" |
4be87837 | 27 | #include "osabi.h" |
def18405 MK |
28 | #include "regcache.h" |
29 | #include "regset.h" | |
30 | #include "trad-frame.h" | |
31 | #include "tramp-frame.h" | |
32 | ||
33 | #include "gdb_assert.h" | |
34 | #include "gdb_string.h" | |
485721b1 JT |
35 | |
36 | #include "ppc-tdep.h" | |
37 | #include "ppcnbsd-tdep.h" | |
485721b1 JT |
38 | #include "solib-svr4.h" |
39 | ||
def18405 MK |
40 | /* Register offsets from <machine/reg.h>. */ |
41 | struct ppc_reg_offsets ppcnbsd_reg_offsets; | |
42 | \f | |
485721b1 | 43 | |
def18405 | 44 | /* Core file support. */ |
485721b1 | 45 | |
1e17aef8 | 46 | /* NetBSD/powerpc register sets. */ |
485721b1 | 47 | |
def18405 | 48 | struct regset ppcnbsd_gregset = |
485721b1 | 49 | { |
def18405 MK |
50 | &ppcnbsd_reg_offsets, |
51 | ppc_supply_gregset | |
52 | }; | |
485721b1 | 53 | |
def18405 | 54 | struct regset ppcnbsd_fpregset = |
485721b1 | 55 | { |
def18405 MK |
56 | &ppcnbsd_reg_offsets, |
57 | ppc_supply_fpregset | |
58 | }; | |
485721b1 | 59 | |
def18405 MK |
60 | /* Return the appropriate register set for the core section identified |
61 | by SECT_NAME and SECT_SIZE. */ | |
485721b1 | 62 | |
def18405 MK |
63 | static const struct regset * |
64 | ppcnbsd_regset_from_core_section (struct gdbarch *gdbarch, | |
65 | const char *sect_name, size_t sect_size) | |
485721b1 | 66 | { |
def18405 MK |
67 | if (strcmp (sect_name, ".reg") == 0 && sect_size >= 148) |
68 | return &ppcnbsd_gregset; | |
485721b1 | 69 | |
def18405 MK |
70 | if (strcmp (sect_name, ".reg2") == 0 && sect_size >= 264) |
71 | return &ppcnbsd_fpregset; | |
485721b1 | 72 | |
def18405 | 73 | return NULL; |
485721b1 | 74 | } |
def18405 | 75 | \f |
485721b1 | 76 | |
def18405 | 77 | /* NetBSD is confused. It appears that 1.5 was using the correct SVR4 |
957e27ac AC |
78 | convention but, 1.6 switched to the below broken convention. For |
79 | the moment use the broken convention. Ulgh!. */ | |
80 | ||
05580c65 AC |
81 | static enum return_value_convention |
82 | ppcnbsd_return_value (struct gdbarch *gdbarch, struct type *valtype, | |
21f79b33 NW |
83 | struct regcache *regcache, gdb_byte *readbuf, |
84 | const gdb_byte *writebuf) | |
05580c65 | 85 | { |
def18405 | 86 | #if 0 |
05580c65 AC |
87 | if ((TYPE_CODE (valtype) == TYPE_CODE_STRUCT |
88 | || TYPE_CODE (valtype) == TYPE_CODE_UNION) | |
89 | && !((TYPE_LENGTH (valtype) == 16 || TYPE_LENGTH (valtype) == 8) | |
90 | && TYPE_VECTOR (valtype)) | |
91 | && !(TYPE_LENGTH (valtype) == 1 | |
92 | || TYPE_LENGTH (valtype) == 2 | |
93 | || TYPE_LENGTH (valtype) == 4 | |
94 | || TYPE_LENGTH (valtype) == 8)) | |
95 | return RETURN_VALUE_STRUCT_CONVENTION; | |
96 | else | |
def18405 | 97 | #endif |
05580c65 | 98 | return ppc_sysv_abi_broken_return_value (gdbarch, valtype, regcache, |
963e2bb7 | 99 | readbuf, writebuf); |
957e27ac | 100 | } |
def18405 MK |
101 | \f |
102 | ||
103 | /* Signal trampolines. */ | |
104 | ||
105 | static const struct tramp_frame ppcnbsd2_sigtramp; | |
957e27ac | 106 | |
476be15e AC |
107 | static void |
108 | ppcnbsd_sigtramp_cache_init (const struct tramp_frame *self, | |
109 | struct frame_info *next_frame, | |
110 | struct trad_frame_cache *this_cache, | |
111 | CORE_ADDR func) | |
112 | { | |
476be15e AC |
113 | struct gdbarch *gdbarch = get_frame_arch (next_frame); |
114 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
def18405 MK |
115 | CORE_ADDR addr, base; |
116 | int i; | |
476be15e AC |
117 | |
118 | base = frame_unwind_register_unsigned (next_frame, SP_REGNUM); | |
def18405 MK |
119 | if (self == &ppcnbsd2_sigtramp) |
120 | addr = base + 0x10 + 2 * tdep->wordsize; | |
121 | else | |
122 | addr = base + 0x18 + 2 * tdep->wordsize; | |
123 | for (i = 0; i < ppc_num_gprs; i++, addr += tdep->wordsize) | |
476be15e AC |
124 | { |
125 | int regnum = i + tdep->ppc_gp0_regnum; | |
def18405 | 126 | trad_frame_set_reg_addr (this_cache, regnum, addr); |
476be15e | 127 | } |
def18405 MK |
128 | trad_frame_set_reg_addr (this_cache, tdep->ppc_lr_regnum, addr); |
129 | addr += tdep->wordsize; | |
130 | trad_frame_set_reg_addr (this_cache, tdep->ppc_cr_regnum, addr); | |
131 | addr += tdep->wordsize; | |
132 | trad_frame_set_reg_addr (this_cache, tdep->ppc_xer_regnum, addr); | |
133 | addr += tdep->wordsize; | |
134 | trad_frame_set_reg_addr (this_cache, tdep->ppc_ctr_regnum, addr); | |
135 | addr += tdep->wordsize; | |
136 | trad_frame_set_reg_addr (this_cache, PC_REGNUM, addr); /* SRR0? */ | |
137 | addr += tdep->wordsize; | |
476be15e AC |
138 | |
139 | /* Construct the frame ID using the function start. */ | |
140 | trad_frame_set_id (this_cache, frame_id_build (base, func)); | |
141 | } | |
142 | ||
def18405 MK |
143 | static const struct tramp_frame ppcnbsd_sigtramp = |
144 | { | |
145 | SIGTRAMP_FRAME, | |
146 | 4, | |
147 | { | |
148 | { 0x3821fff0, -1 }, /* add r1,r1,-16 */ | |
149 | { 0x4e800021, -1 }, /* blrl */ | |
150 | { 0x38610018, -1 }, /* addi r3,r1,24 */ | |
151 | { 0x38000127, -1 }, /* li r0,295 */ | |
152 | { 0x44000002, -1 }, /* sc */ | |
153 | { 0x38000001, -1 }, /* li r0,1 */ | |
154 | { 0x44000002, -1 }, /* sc */ | |
155 | { TRAMP_SENTINEL_INSN, -1 } | |
156 | }, | |
157 | ppcnbsd_sigtramp_cache_init | |
158 | }; | |
159 | ||
160 | /* NetBSD 2.0 introduced a slightly different signal trampoline. */ | |
476be15e | 161 | |
def18405 MK |
162 | static const struct tramp_frame ppcnbsd2_sigtramp = |
163 | { | |
2cd8546d | 164 | SIGTRAMP_FRAME, |
def18405 MK |
165 | 4, |
166 | { | |
167 | { 0x3821fff0, -1 }, /* add r1,r1,-16 */ | |
168 | { 0x4e800021, -1 }, /* blrl */ | |
169 | { 0x38610010, -1 }, /* addi r3,r1,16 */ | |
170 | { 0x38000127, -1 }, /* li r0,295 */ | |
171 | { 0x44000002, -1 }, /* sc */ | |
172 | { 0x38000001, -1 }, /* li r0,1 */ | |
173 | { 0x44000002, -1 }, /* sc */ | |
2cd8546d | 174 | { TRAMP_SENTINEL_INSN, -1 } |
476be15e AC |
175 | }, |
176 | ppcnbsd_sigtramp_cache_init | |
177 | }; | |
def18405 | 178 | \f |
476be15e | 179 | |
485721b1 JT |
180 | static void |
181 | ppcnbsd_init_abi (struct gdbarch_info info, | |
182 | struct gdbarch *gdbarch) | |
183 | { | |
e754ae69 AC |
184 | /* For NetBSD, this is an on again, off again thing. Some systems |
185 | do use the broken struct convention, and some don't. */ | |
05580c65 | 186 | set_gdbarch_return_value (gdbarch, ppcnbsd_return_value); |
def18405 MK |
187 | |
188 | /* NetBSD uses SVR4-style shared libraries. */ | |
189 | set_solib_svr4_fetch_link_map_offsets | |
190 | (gdbarch, svr4_ilp32_fetch_link_map_offsets); | |
191 | ||
192 | set_gdbarch_regset_from_core_section | |
193 | (gdbarch, ppcnbsd_regset_from_core_section); | |
194 | ||
476be15e | 195 | tramp_frame_prepend_unwinder (gdbarch, &ppcnbsd_sigtramp); |
def18405 | 196 | tramp_frame_prepend_unwinder (gdbarch, &ppcnbsd2_sigtramp); |
485721b1 | 197 | } |
def18405 MK |
198 | \f |
199 | ||
200 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
201 | void _initialize_ppcnbsd_tdep (void); | |
485721b1 JT |
202 | |
203 | void | |
204 | _initialize_ppcnbsd_tdep (void) | |
205 | { | |
05816f70 | 206 | gdbarch_register_osabi (bfd_arch_powerpc, 0, GDB_OSABI_NETBSD_ELF, |
485721b1 JT |
207 | ppcnbsd_init_abi); |
208 | ||
def18405 MK |
209 | /* Avoid initializing the register offsets again if they were |
210 | already initailized by ppcnbsd-nat.c. */ | |
211 | if (ppcnbsd_reg_offsets.pc_offset == 0) | |
212 | { | |
213 | /* General-purpose registers. */ | |
214 | ppcnbsd_reg_offsets.r0_offset = 0; | |
215 | ppcnbsd_reg_offsets.lr_offset = 128; | |
216 | ppcnbsd_reg_offsets.cr_offset = 132; | |
217 | ppcnbsd_reg_offsets.xer_offset = 136; | |
218 | ppcnbsd_reg_offsets.ctr_offset = 140; | |
219 | ppcnbsd_reg_offsets.pc_offset = 144; | |
220 | ppcnbsd_reg_offsets.ps_offset = -1; | |
221 | ppcnbsd_reg_offsets.mq_offset = -1; | |
222 | ||
223 | /* Floating-point registers. */ | |
224 | ppcnbsd_reg_offsets.f0_offset = 0; | |
225 | ppcnbsd_reg_offsets.fpscr_offset = 256; | |
226 | ||
227 | /* AltiVec registers. */ | |
228 | ppcnbsd_reg_offsets.vr0_offset = 0; | |
229 | ppcnbsd_reg_offsets.vrsave_offset = 512; | |
230 | ppcnbsd_reg_offsets.vscr_offset = 524; | |
231 | } | |
485721b1 | 232 | } |