Commit | Line | Data |
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def18405 | 1 | /* Target-dependent code for NetBSD/powerpc. |
476be15e | 2 | |
28e7fd62 | 3 | Copyright (C) 2002-2013 Free Software Foundation, Inc. |
476be15e | 4 | |
485721b1 JT |
5 | Contributed by Wasabi Systems, 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 |
485721b1 JT |
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/>. */ |
485721b1 JT |
21 | |
22 | #include "defs.h" | |
def18405 | 23 | #include "gdbtypes.h" |
4be87837 | 24 | #include "osabi.h" |
def18405 MK |
25 | #include "regcache.h" |
26 | #include "regset.h" | |
27 | #include "trad-frame.h" | |
28 | #include "tramp-frame.h" | |
29 | ||
30 | #include "gdb_assert.h" | |
0e9f083f | 31 | #include <string.h> |
485721b1 JT |
32 | |
33 | #include "ppc-tdep.h" | |
34 | #include "ppcnbsd-tdep.h" | |
485721b1 JT |
35 | #include "solib-svr4.h" |
36 | ||
def18405 MK |
37 | /* Register offsets from <machine/reg.h>. */ |
38 | struct ppc_reg_offsets ppcnbsd_reg_offsets; | |
39 | \f | |
485721b1 | 40 | |
def18405 | 41 | /* Core file support. */ |
485721b1 | 42 | |
1e17aef8 | 43 | /* NetBSD/powerpc register sets. */ |
485721b1 | 44 | |
def18405 | 45 | struct regset ppcnbsd_gregset = |
485721b1 | 46 | { |
def18405 MK |
47 | &ppcnbsd_reg_offsets, |
48 | ppc_supply_gregset | |
49 | }; | |
485721b1 | 50 | |
def18405 | 51 | struct regset ppcnbsd_fpregset = |
485721b1 | 52 | { |
def18405 MK |
53 | &ppcnbsd_reg_offsets, |
54 | ppc_supply_fpregset | |
55 | }; | |
485721b1 | 56 | |
def18405 MK |
57 | /* Return the appropriate register set for the core section identified |
58 | by SECT_NAME and SECT_SIZE. */ | |
485721b1 | 59 | |
def18405 MK |
60 | static const struct regset * |
61 | ppcnbsd_regset_from_core_section (struct gdbarch *gdbarch, | |
62 | const char *sect_name, size_t sect_size) | |
485721b1 | 63 | { |
def18405 MK |
64 | if (strcmp (sect_name, ".reg") == 0 && sect_size >= 148) |
65 | return &ppcnbsd_gregset; | |
485721b1 | 66 | |
def18405 MK |
67 | if (strcmp (sect_name, ".reg2") == 0 && sect_size >= 264) |
68 | return &ppcnbsd_fpregset; | |
485721b1 | 69 | |
def18405 | 70 | return NULL; |
485721b1 | 71 | } |
def18405 | 72 | \f |
485721b1 | 73 | |
def18405 | 74 | /* NetBSD is confused. It appears that 1.5 was using the correct SVR4 |
957e27ac | 75 | convention but, 1.6 switched to the below broken convention. For |
0df8b418 | 76 | the moment use the broken convention. Ulgh! */ |
957e27ac | 77 | |
05580c65 | 78 | static enum return_value_convention |
6a3a010b | 79 | ppcnbsd_return_value (struct gdbarch *gdbarch, struct value *function, |
c055b101 CV |
80 | struct type *valtype, struct regcache *regcache, |
81 | gdb_byte *readbuf, const gdb_byte *writebuf) | |
05580c65 | 82 | { |
def18405 | 83 | #if 0 |
05580c65 AC |
84 | if ((TYPE_CODE (valtype) == TYPE_CODE_STRUCT |
85 | || TYPE_CODE (valtype) == TYPE_CODE_UNION) | |
86 | && !((TYPE_LENGTH (valtype) == 16 || TYPE_LENGTH (valtype) == 8) | |
87 | && TYPE_VECTOR (valtype)) | |
88 | && !(TYPE_LENGTH (valtype) == 1 | |
89 | || TYPE_LENGTH (valtype) == 2 | |
90 | || TYPE_LENGTH (valtype) == 4 | |
91 | || TYPE_LENGTH (valtype) == 8)) | |
92 | return RETURN_VALUE_STRUCT_CONVENTION; | |
93 | else | |
def18405 | 94 | #endif |
6a3a010b | 95 | return ppc_sysv_abi_broken_return_value (gdbarch, function, valtype, |
c055b101 | 96 | regcache, readbuf, writebuf); |
957e27ac | 97 | } |
def18405 MK |
98 | \f |
99 | ||
100 | /* Signal trampolines. */ | |
101 | ||
102 | static const struct tramp_frame ppcnbsd2_sigtramp; | |
957e27ac | 103 | |
476be15e AC |
104 | static void |
105 | ppcnbsd_sigtramp_cache_init (const struct tramp_frame *self, | |
5366653e | 106 | struct frame_info *this_frame, |
476be15e AC |
107 | struct trad_frame_cache *this_cache, |
108 | CORE_ADDR func) | |
109 | { | |
5366653e | 110 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
476be15e | 111 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
def18405 MK |
112 | CORE_ADDR addr, base; |
113 | int i; | |
476be15e | 114 | |
5366653e DJ |
115 | base = get_frame_register_unsigned (this_frame, |
116 | gdbarch_sp_regnum (gdbarch)); | |
def18405 MK |
117 | if (self == &ppcnbsd2_sigtramp) |
118 | addr = base + 0x10 + 2 * tdep->wordsize; | |
119 | else | |
120 | addr = base + 0x18 + 2 * tdep->wordsize; | |
121 | for (i = 0; i < ppc_num_gprs; i++, addr += tdep->wordsize) | |
476be15e AC |
122 | { |
123 | int regnum = i + tdep->ppc_gp0_regnum; | |
def18405 | 124 | trad_frame_set_reg_addr (this_cache, regnum, addr); |
476be15e | 125 | } |
def18405 MK |
126 | trad_frame_set_reg_addr (this_cache, tdep->ppc_lr_regnum, addr); |
127 | addr += tdep->wordsize; | |
128 | trad_frame_set_reg_addr (this_cache, tdep->ppc_cr_regnum, addr); | |
129 | addr += tdep->wordsize; | |
130 | trad_frame_set_reg_addr (this_cache, tdep->ppc_xer_regnum, addr); | |
131 | addr += tdep->wordsize; | |
132 | trad_frame_set_reg_addr (this_cache, tdep->ppc_ctr_regnum, addr); | |
133 | addr += tdep->wordsize; | |
40a6adc1 | 134 | trad_frame_set_reg_addr (this_cache, gdbarch_pc_regnum (gdbarch), |
0df8b418 | 135 | addr); /* SRR0? */ |
def18405 | 136 | addr += tdep->wordsize; |
476be15e AC |
137 | |
138 | /* Construct the frame ID using the function start. */ | |
139 | trad_frame_set_id (this_cache, frame_id_build (base, func)); | |
140 | } | |
141 | ||
def18405 MK |
142 | static const struct tramp_frame ppcnbsd_sigtramp = |
143 | { | |
144 | SIGTRAMP_FRAME, | |
145 | 4, | |
146 | { | |
147 | { 0x3821fff0, -1 }, /* add r1,r1,-16 */ | |
148 | { 0x4e800021, -1 }, /* blrl */ | |
149 | { 0x38610018, -1 }, /* addi r3,r1,24 */ | |
150 | { 0x38000127, -1 }, /* li r0,295 */ | |
151 | { 0x44000002, -1 }, /* sc */ | |
152 | { 0x38000001, -1 }, /* li r0,1 */ | |
153 | { 0x44000002, -1 }, /* sc */ | |
154 | { TRAMP_SENTINEL_INSN, -1 } | |
155 | }, | |
156 | ppcnbsd_sigtramp_cache_init | |
157 | }; | |
158 | ||
159 | /* NetBSD 2.0 introduced a slightly different signal trampoline. */ | |
476be15e | 160 | |
def18405 MK |
161 | static const struct tramp_frame ppcnbsd2_sigtramp = |
162 | { | |
2cd8546d | 163 | SIGTRAMP_FRAME, |
def18405 MK |
164 | 4, |
165 | { | |
166 | { 0x3821fff0, -1 }, /* add r1,r1,-16 */ | |
167 | { 0x4e800021, -1 }, /* blrl */ | |
168 | { 0x38610010, -1 }, /* addi r3,r1,16 */ | |
169 | { 0x38000127, -1 }, /* li r0,295 */ | |
170 | { 0x44000002, -1 }, /* sc */ | |
171 | { 0x38000001, -1 }, /* li r0,1 */ | |
172 | { 0x44000002, -1 }, /* sc */ | |
2cd8546d | 173 | { TRAMP_SENTINEL_INSN, -1 } |
476be15e AC |
174 | }, |
175 | ppcnbsd_sigtramp_cache_init | |
176 | }; | |
def18405 | 177 | \f |
476be15e | 178 | |
485721b1 JT |
179 | static void |
180 | ppcnbsd_init_abi (struct gdbarch_info info, | |
181 | struct gdbarch *gdbarch) | |
182 | { | |
e754ae69 AC |
183 | /* For NetBSD, this is an on again, off again thing. Some systems |
184 | do use the broken struct convention, and some don't. */ | |
05580c65 | 185 | set_gdbarch_return_value (gdbarch, ppcnbsd_return_value); |
def18405 MK |
186 | |
187 | /* NetBSD uses SVR4-style shared libraries. */ | |
188 | set_solib_svr4_fetch_link_map_offsets | |
189 | (gdbarch, svr4_ilp32_fetch_link_map_offsets); | |
190 | ||
191 | set_gdbarch_regset_from_core_section | |
192 | (gdbarch, ppcnbsd_regset_from_core_section); | |
193 | ||
476be15e | 194 | tramp_frame_prepend_unwinder (gdbarch, &ppcnbsd_sigtramp); |
def18405 | 195 | tramp_frame_prepend_unwinder (gdbarch, &ppcnbsd2_sigtramp); |
485721b1 | 196 | } |
def18405 MK |
197 | \f |
198 | ||
199 | /* Provide a prototype to silence -Wmissing-prototypes. */ | |
200 | void _initialize_ppcnbsd_tdep (void); | |
485721b1 JT |
201 | |
202 | void | |
203 | _initialize_ppcnbsd_tdep (void) | |
204 | { | |
05816f70 | 205 | gdbarch_register_osabi (bfd_arch_powerpc, 0, GDB_OSABI_NETBSD_ELF, |
485721b1 JT |
206 | ppcnbsd_init_abi); |
207 | ||
def18405 MK |
208 | /* Avoid initializing the register offsets again if they were |
209 | already initailized by ppcnbsd-nat.c. */ | |
210 | if (ppcnbsd_reg_offsets.pc_offset == 0) | |
211 | { | |
212 | /* General-purpose registers. */ | |
213 | ppcnbsd_reg_offsets.r0_offset = 0; | |
f2db237a AM |
214 | ppcnbsd_reg_offsets.gpr_size = 4; |
215 | ppcnbsd_reg_offsets.xr_size = 4; | |
def18405 MK |
216 | ppcnbsd_reg_offsets.lr_offset = 128; |
217 | ppcnbsd_reg_offsets.cr_offset = 132; | |
218 | ppcnbsd_reg_offsets.xer_offset = 136; | |
219 | ppcnbsd_reg_offsets.ctr_offset = 140; | |
220 | ppcnbsd_reg_offsets.pc_offset = 144; | |
221 | ppcnbsd_reg_offsets.ps_offset = -1; | |
222 | ppcnbsd_reg_offsets.mq_offset = -1; | |
223 | ||
224 | /* Floating-point registers. */ | |
225 | ppcnbsd_reg_offsets.f0_offset = 0; | |
226 | ppcnbsd_reg_offsets.fpscr_offset = 256; | |
f2db237a | 227 | ppcnbsd_reg_offsets.fpscr_size = 4; |
def18405 MK |
228 | |
229 | /* AltiVec registers. */ | |
230 | ppcnbsd_reg_offsets.vr0_offset = 0; | |
231 | ppcnbsd_reg_offsets.vrsave_offset = 512; | |
232 | ppcnbsd_reg_offsets.vscr_offset = 524; | |
233 | } | |
485721b1 | 234 | } |