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485721b1 JT |
1 | /* Target-dependent code for PowerPC systems running NetBSD. |
2 | Copyright 2002 Free Software Foundation, Inc. | |
3 | Contributed by Wasabi Systems, 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 "gdbcore.h" | |
24 | #include "regcache.h" | |
25 | #include "target.h" | |
26 | #include "breakpoint.h" | |
27 | #include "value.h" | |
28 | ||
29 | #include "ppc-tdep.h" | |
30 | #include "ppcnbsd-tdep.h" | |
31 | #include "nbsd-tdep.h" | |
32 | ||
33 | #include "solib-svr4.h" | |
34 | ||
35 | #define REG_FIXREG_OFFSET(x) ((x) * 4) | |
36 | #define REG_LR_OFFSET (32 * 4) | |
37 | #define REG_CR_OFFSET (33 * 4) | |
38 | #define REG_XER_OFFSET (34 * 4) | |
39 | #define REG_CTR_OFFSET (35 * 4) | |
40 | #define REG_PC_OFFSET (36 * 4) | |
41 | #define SIZEOF_STRUCT_REG (37 * 4) | |
42 | ||
43 | #define FPREG_FPR_OFFSET(x) ((x) * 8) | |
44 | #define FPREG_FPSCR_OFFSET (32 * 8) | |
45 | #define SIZEOF_STRUCT_FPREG (33 * 8) | |
46 | ||
47 | void | |
48 | ppcnbsd_supply_reg (char *regs, int regno) | |
49 | { | |
50 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); | |
51 | int i; | |
52 | ||
53 | for (i = 0; i <= 31; i++) | |
54 | { | |
55 | if (regno == i || regno == -1) | |
56 | supply_register (i, regs + REG_FIXREG_OFFSET (i)); | |
57 | } | |
58 | ||
59 | if (regno == tdep->ppc_lr_regnum || regno == -1) | |
60 | supply_register (tdep->ppc_lr_regnum, regs + REG_LR_OFFSET); | |
61 | ||
62 | if (regno == tdep->ppc_cr_regnum || regno == -1) | |
63 | supply_register (tdep->ppc_cr_regnum, regs + REG_CR_OFFSET); | |
64 | ||
65 | if (regno == tdep->ppc_xer_regnum || regno == -1) | |
66 | supply_register (tdep->ppc_xer_regnum, regs + REG_XER_OFFSET); | |
67 | ||
68 | if (regno == tdep->ppc_ctr_regnum || regno == -1) | |
69 | supply_register (tdep->ppc_ctr_regnum, regs + REG_CTR_OFFSET); | |
70 | ||
71 | if (regno == PC_REGNUM || regno == -1) | |
72 | supply_register (PC_REGNUM, regs + REG_PC_OFFSET); | |
73 | } | |
74 | ||
75 | void | |
76 | ppcnbsd_fill_reg (char *regs, int regno) | |
77 | { | |
78 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); | |
79 | int i; | |
80 | ||
81 | for (i = 0; i <= 31; i++) | |
82 | { | |
83 | if (regno == i || regno == -1) | |
84 | regcache_collect (i, regs + REG_FIXREG_OFFSET (i)); | |
85 | } | |
86 | ||
87 | if (regno == tdep->ppc_lr_regnum || regno == -1) | |
88 | regcache_collect (tdep->ppc_lr_regnum, regs + REG_LR_OFFSET); | |
89 | ||
90 | if (regno == tdep->ppc_cr_regnum || regno == -1) | |
91 | regcache_collect (tdep->ppc_cr_regnum, regs + REG_CR_OFFSET); | |
92 | ||
93 | if (regno == tdep->ppc_xer_regnum || regno == -1) | |
94 | regcache_collect (tdep->ppc_xer_regnum, regs + REG_XER_OFFSET); | |
95 | ||
96 | if (regno == tdep->ppc_ctr_regnum || regno == -1) | |
97 | regcache_collect (tdep->ppc_ctr_regnum, regs + REG_CTR_OFFSET); | |
98 | ||
99 | if (regno == PC_REGNUM || regno == -1) | |
100 | regcache_collect (PC_REGNUM, regs + REG_PC_OFFSET); | |
101 | } | |
102 | ||
103 | void | |
104 | ppcnbsd_supply_fpreg (char *fpregs, int regno) | |
105 | { | |
106 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); | |
107 | int i; | |
108 | ||
109 | for (i = FP0_REGNUM; i <= FP0_REGNUM + 31; i++) | |
110 | { | |
111 | if (regno == i || regno == -1) | |
112 | supply_register (i, fpregs + FPREG_FPR_OFFSET (i - FP0_REGNUM)); | |
113 | } | |
114 | ||
115 | if (regno == tdep->ppc_fpscr_regnum || regno == -1) | |
116 | supply_register (tdep->ppc_fpscr_regnum, fpregs + FPREG_FPSCR_OFFSET); | |
117 | } | |
118 | ||
119 | void | |
120 | ppcnbsd_fill_fpreg (char *fpregs, int regno) | |
121 | { | |
122 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); | |
123 | int i; | |
124 | ||
125 | for (i = FP0_REGNUM; i <= FP0_REGNUM + 31; i++) | |
126 | { | |
127 | if (regno == i || regno == -1) | |
128 | regcache_collect (i, fpregs + FPREG_FPR_OFFSET (i - FP0_REGNUM)); | |
129 | } | |
130 | ||
131 | if (regno == tdep->ppc_fpscr_regnum || regno == -1) | |
132 | regcache_collect (tdep->ppc_fpscr_regnum, fpregs + FPREG_FPSCR_OFFSET); | |
133 | } | |
134 | ||
135 | static void | |
136 | fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which, | |
137 | CORE_ADDR ignore) | |
138 | { | |
139 | char *regs, *fpregs; | |
140 | ||
141 | /* We get everything from one section. */ | |
142 | if (which != 0) | |
143 | return; | |
144 | ||
145 | regs = core_reg_sect; | |
146 | fpregs = core_reg_sect + SIZEOF_STRUCT_REG; | |
147 | ||
148 | /* Integer registers. */ | |
149 | ppcnbsd_supply_reg (regs, -1); | |
150 | ||
151 | /* Floating point registers. */ | |
152 | ppcnbsd_supply_fpreg (fpregs, -1); | |
153 | } | |
154 | ||
155 | static void | |
156 | fetch_elfcore_registers (char *core_reg_sect, unsigned core_reg_size, int which, | |
157 | CORE_ADDR ignore) | |
158 | { | |
159 | switch (which) | |
160 | { | |
161 | case 0: /* Integer registers. */ | |
162 | if (core_reg_size != SIZEOF_STRUCT_REG) | |
163 | warning ("Wrong size register set in core file."); | |
164 | else | |
165 | ppcnbsd_supply_reg (core_reg_sect, -1); | |
166 | break; | |
167 | ||
168 | case 2: /* Floating point registers. */ | |
169 | if (core_reg_size != SIZEOF_STRUCT_FPREG) | |
170 | warning ("Wrong size FP register set in core file."); | |
171 | else | |
172 | ppcnbsd_supply_fpreg (core_reg_sect, -1); | |
173 | break; | |
174 | ||
175 | default: | |
176 | /* Don't know what kind of register request this is; just ignore it. */ | |
177 | break; | |
178 | } | |
179 | } | |
180 | ||
181 | static struct core_fns ppcnbsd_core_fns = | |
182 | { | |
183 | bfd_target_unknown_flavour, /* core_flavour */ | |
184 | default_check_format, /* check_format */ | |
185 | default_core_sniffer, /* core_sniffer */ | |
186 | fetch_core_registers, /* core_read_registers */ | |
187 | NULL /* next */ | |
188 | }; | |
189 | ||
190 | static struct core_fns ppcnbsd_elfcore_fns = | |
191 | { | |
192 | bfd_target_elf_flavour, /* core_flavour */ | |
193 | default_check_format, /* check_format */ | |
194 | default_core_sniffer, /* core_sniffer */ | |
195 | fetch_elfcore_registers, /* core_read_registers */ | |
196 | NULL /* next */ | |
197 | }; | |
198 | ||
199 | static void | |
200 | ppcnbsd_init_abi (struct gdbarch_info info, | |
201 | struct gdbarch *gdbarch) | |
202 | { | |
203 | /* Until November 2001, gcc was not complying to the SYSV ABI for | |
204 | returning structures less than or equal to 8 bytes in size. It was | |
205 | returning everything in memory. When this was corrected, it wasn't | |
206 | fixed for native platforms. */ | |
207 | set_gdbarch_use_struct_convention (gdbarch, | |
208 | ppc_sysv_abi_broken_use_struct_convention); | |
209 | ||
210 | set_solib_svr4_fetch_link_map_offsets (gdbarch, | |
211 | nbsd_ilp32_solib_svr4_fetch_link_map_offsets); | |
212 | } | |
213 | ||
214 | void | |
215 | _initialize_ppcnbsd_tdep (void) | |
216 | { | |
217 | gdbarch_register_osabi (bfd_arch_powerpc, GDB_OSABI_NETBSD_ELF, | |
218 | ppcnbsd_init_abi); | |
219 | ||
220 | add_core_fns (&ppcnbsd_core_fns); | |
221 | add_core_fns (&ppcnbsd_elfcore_fns); | |
222 | } |