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1 | /* Target-dependent code for SuperH running NetBSD, for GDB. |
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 "value.h" | |
26 | #include "solib-svr4.h" | |
27 | ||
28 | #include "sh-nbsd-tdep.h" | |
29 | ||
30 | /* Convert an r0-r15 register number into an offset into a ptrace | |
31 | register structure. */ | |
32 | static const int regmap[] = | |
33 | { | |
34 | (20 * 4), /* r0 */ | |
35 | (19 * 4), /* r1 */ | |
36 | (18 * 4), /* r2 */ | |
37 | (17 * 4), /* r3 */ | |
38 | (16 * 4), /* r4 */ | |
39 | (15 * 4), /* r5 */ | |
40 | (14 * 4), /* r6 */ | |
41 | (13 * 4), /* r7 */ | |
42 | (12 * 4), /* r8 */ | |
43 | (11 * 4), /* r9 */ | |
44 | (10 * 4), /* r10 */ | |
45 | ( 9 * 4), /* r11 */ | |
46 | ( 8 * 4), /* r12 */ | |
47 | ( 7 * 4), /* r13 */ | |
48 | ( 6 * 4), /* r14 */ | |
49 | ( 5 * 4), /* r15 */ | |
50 | }; | |
51 | ||
52 | #define SIZEOF_STRUCT_REG (21 * 4) | |
53 | ||
54 | void | |
55 | sh_nbsd_supply_registers (char *regs) | |
56 | { | |
57 | int regno; | |
58 | ||
59 | for (regno = R0_REGNUM; regno <= (R0_REGNUM + 15); regno++) | |
60 | supply_register (regno, regs + regmap[regno - R0_REGNUM]); | |
61 | ||
62 | supply_register (PC_REGNUM, regs + (0 * 4)); | |
63 | supply_register (SR_REGNUM, regs + (1 * 4)); | |
64 | supply_register (PR_REGNUM, regs + (2 * 4)); | |
65 | supply_register (MACH_REGNUM, regs + (3 * 4)); | |
66 | supply_register (MACL_REGNUM, regs + (4 * 4)); | |
67 | } | |
68 | ||
69 | void | |
70 | sh_nbsd_supply_register (char *regs, int regno) | |
71 | { | |
72 | if (regno == -1) | |
73 | sh_nbsd_supply_registers (regs); | |
74 | ||
75 | if (regno == PC_REGNUM) | |
76 | supply_register (PC_REGNUM, regs + (0 * 4)); | |
77 | else if (regno == SR_REGNUM) | |
78 | supply_register (SR_REGNUM, regs + (1 * 4)); | |
79 | else if (regno == PR_REGNUM) | |
80 | supply_register (PR_REGNUM, regs + (2 * 4)); | |
81 | else if (regno == MACH_REGNUM) | |
82 | supply_register (MACH_REGNUM, regs + (3 * 4)); | |
83 | else if (regno == MACL_REGNUM) | |
84 | supply_register (MACL_REGNUM, regs + (4 * 4)); | |
85 | else if (regno >= R0_REGNUM && regno <= (R0_REGNUM + 15)) | |
86 | supply_register (regno, regs + regmap[regno - R0_REGNUM]); | |
87 | } | |
88 | ||
89 | void | |
90 | sh_nbsd_fill_registers (char *regs) | |
91 | { | |
92 | int regno; | |
93 | ||
94 | for (regno = R0_REGNUM; regno <= (R0_REGNUM + 15); regno++) | |
95 | regcache_collect (regno, regs + regmap[regno - R0_REGNUM]); | |
96 | ||
97 | regcache_collect (PC_REGNUM, regs + (0 * 4)); | |
98 | regcache_collect (SR_REGNUM, regs + (1 * 4)); | |
99 | regcache_collect (PR_REGNUM, regs + (2 * 4)); | |
100 | regcache_collect (MACH_REGNUM, regs + (3 * 4)); | |
101 | regcache_collect (MACL_REGNUM, regs + (4 * 4)); | |
102 | } | |
103 | ||
104 | void | |
105 | sh_nbsd_fill_register (char *regs, int regno) | |
106 | { | |
107 | if (regno == -1) | |
108 | sh_nbsd_fill_registers (regs); | |
109 | ||
110 | if (regno == PC_REGNUM) | |
111 | regcache_collect (PC_REGNUM, regs + (0 * 4)); | |
112 | else if (regno == SR_REGNUM) | |
113 | regcache_collect (SR_REGNUM, regs + (1 * 4)); | |
114 | else if (regno == PR_REGNUM) | |
115 | regcache_collect (PR_REGNUM, regs + (2 * 4)); | |
116 | else if (regno == MACH_REGNUM) | |
117 | regcache_collect (MACH_REGNUM, regs + (3 * 4)); | |
118 | else if (regno == MACL_REGNUM) | |
119 | regcache_collect (MACL_REGNUM, regs + (4 * 4)); | |
120 | else if (regno >= R0_REGNUM && regno <= (R0_REGNUM + 15)) | |
121 | regcache_collect (regno, regs + regmap[regno - R0_REGNUM]); | |
122 | } | |
123 | ||
124 | /* Fetch (and possibly build) an appropriate link_map_offsets | |
125 | structure for NetBSD/sh targets using the struct offsets | |
126 | defined in <link.h> (but without actual reference to that file). | |
127 | ||
128 | This makes it possible to access NetBSD/sh shared libraries | |
129 | from a GDB that was not built on a NetBSD/sh host (for cross | |
130 | debugging). */ | |
131 | ||
132 | static struct link_map_offsets * | |
133 | sh_nbsd_solib_svr4_fetch_link_map_offsets (void) | |
134 | { | |
135 | static struct link_map_offsets lmo; | |
136 | static struct link_map_offsets *lmp = NULL; | |
137 | ||
138 | if (lmp == NULL) | |
139 | { | |
140 | lmp = &lmo; | |
141 | ||
142 | lmo.r_debug_size = 16; | |
143 | ||
144 | lmo.r_map_offset = 4; | |
145 | lmo.r_map_size = 4; | |
146 | ||
147 | lmo.link_map_size = 20; | |
148 | ||
149 | lmo.l_addr_offset = 0; | |
150 | lmo.l_addr_size = 4; | |
151 | ||
152 | lmo.l_name_offset = 4; | |
153 | lmo.l_name_size = 4; | |
154 | ||
155 | lmo.l_next_offset = 12; | |
156 | lmo.l_next_size = 4; | |
157 | ||
158 | lmo.l_prev_offset = 16; | |
159 | lmo.l_prev_size = 4; | |
160 | } | |
161 | ||
162 | return lmp; | |
163 | } | |
164 | ||
165 | static void | |
166 | fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, | |
167 | int which, CORE_ADDR ignore) | |
168 | { | |
169 | /* We get everything from the .reg section. */ | |
170 | if (which != 0) | |
171 | return; | |
172 | ||
173 | if (core_reg_size < SIZEOF_STRUCT_REG) | |
174 | { | |
175 | warning ("Wrong size register set in core file."); | |
176 | return; | |
177 | } | |
178 | ||
179 | /* Integer registers. */ | |
180 | sh_nbsd_supply_registers (core_reg_sect); | |
181 | } | |
182 | ||
183 | static void | |
184 | fetch_elfcore_registers (char *core_reg_sect, unsigned core_reg_size, | |
185 | int which, CORE_ADDR ignore) | |
186 | { | |
187 | switch (which) | |
188 | { | |
189 | case 0: /* Integer registers. */ | |
190 | if (core_reg_size != SIZEOF_STRUCT_REG) | |
191 | warning ("Wrong size register set in core file."); | |
192 | else | |
193 | sh_nbsd_supply_registers (core_reg_sect); | |
194 | break; | |
195 | ||
196 | default: | |
197 | /* Don't know what kind of register request this is; just ignore it. */ | |
198 | break; | |
199 | } | |
200 | } | |
201 | ||
202 | static struct core_fns sh_nbsd_core_fns = | |
203 | { | |
204 | bfd_target_unknown_flavour, /* core_flavour */ | |
205 | default_check_format, /* check_format */ | |
206 | default_core_sniffer, /* core_sniffer */ | |
207 | fetch_core_registers, /* core_read_registers */ | |
208 | NULL /* next */ | |
209 | }; | |
210 | ||
211 | static struct core_fns sh_nbsd_elfcore_fns = | |
212 | { | |
213 | bfd_target_elf_flavour, /* core_flavour */ | |
214 | default_check_format, /* check_format */ | |
215 | default_core_sniffer, /* core_sniffer */ | |
216 | fetch_elfcore_registers, /* core_read_registers */ | |
217 | NULL /* next */ | |
218 | }; | |
219 | ||
220 | static void | |
221 | sh_nbsd_init_abi (struct gdbarch_info info, | |
222 | struct gdbarch *gdbarch) | |
223 | { | |
224 | set_solib_svr4_fetch_link_map_offsets (gdbarch, | |
225 | sh_nbsd_solib_svr4_fetch_link_map_offsets); | |
226 | } | |
227 | ||
228 | void | |
229 | _initialize_sh_nbsd_tdep (void) | |
230 | { | |
231 | add_core_fns (&sh_nbsd_core_fns); | |
232 | add_core_fns (&sh_nbsd_elfcore_fns); | |
233 | ||
234 | sh_gdbarch_register_os_abi (SH_OSABI_NETBSD_ELF, sh_nbsd_init_abi); | |
235 | } |