Commit | Line | Data |
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c906108c | 1 | /* Native support for the SGI Iris running IRIX version 5, for GDB. |
1b13c4f6 | 2 | |
6aba47ca DJ |
3 | Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, |
4 | 1999, 2000, 2001, 2002, 2004, 2006, 2007 Free Software Foundation, Inc. | |
1b13c4f6 | 5 | |
c906108c SS |
6 | Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU |
7 | and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin. | |
8 | Implemented for Irix 4.x by Garrett A. Wollman. | |
9 | Modified for Irix 5.x by Ian Lance Taylor. | |
10 | ||
c5aa993b | 11 | This file is part of GDB. |
c906108c | 12 | |
c5aa993b JM |
13 | This program is free software; you can redistribute it and/or modify |
14 | it under the terms of the GNU General Public License as published by | |
15 | the Free Software Foundation; either version 2 of the License, or | |
16 | (at your option) any later version. | |
c906108c | 17 | |
c5aa993b JM |
18 | This program is distributed in the hope that it will be useful, |
19 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | GNU General Public License for more details. | |
c906108c | 22 | |
c5aa993b JM |
23 | You should have received a copy of the GNU General Public License |
24 | along with this program; if not, write to the Free Software | |
197e01b6 EZ |
25 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
26 | Boston, MA 02110-1301, USA. */ | |
c906108c SS |
27 | |
28 | #include "defs.h" | |
29 | #include "inferior.h" | |
30 | #include "gdbcore.h" | |
31 | #include "target.h" | |
4e052eda | 32 | #include "regcache.h" |
c906108c SS |
33 | |
34 | #include "gdb_string.h" | |
35 | #include <sys/time.h> | |
36 | #include <sys/procfs.h> | |
37 | #include <setjmp.h> /* For JB_XXX. */ | |
38 | ||
c60c0f5f MS |
39 | /* Prototypes for supply_gregset etc. */ |
40 | #include "gregset.h" | |
b639a770 | 41 | #include "mips-tdep.h" |
c60c0f5f | 42 | |
9eefc95f UW |
43 | static void fetch_core_registers (struct regcache *, char *, |
44 | unsigned int, int, CORE_ADDR); | |
c906108c | 45 | |
c906108c SS |
46 | |
47 | /* | |
48 | * See the comment in m68k-tdep.c regarding the utility of these functions. | |
49 | * | |
50 | * These definitions are from the MIPS SVR4 ABI, so they may work for | |
51 | * any MIPS SVR4 target. | |
52 | */ | |
53 | ||
c5aa993b | 54 | void |
7f7fe91e | 55 | supply_gregset (struct regcache *regcache, const gregset_t *gregsetp) |
c906108c | 56 | { |
52f0bd74 | 57 | int regi; |
7f7fe91e | 58 | const greg_t *regp = &(*gregsetp)[0]; |
1b13c4f6 | 59 | int gregoff = sizeof (greg_t) - mips_isa_regsize (current_gdbarch); |
466d7106 | 60 | static char zerobuf[32] = {0}; |
c906108c | 61 | |
c5aa993b | 62 | for (regi = 0; regi <= CTX_RA; regi++) |
7f7fe91e UW |
63 | regcache_raw_supply (regcache, regi, |
64 | (const char *) (regp + regi) + gregoff); | |
65 | ||
66 | regcache_raw_supply (regcache, mips_regnum (current_gdbarch)->pc, | |
67 | (const char *) (regp + CTX_EPC) + gregoff); | |
68 | regcache_raw_supply (regcache, mips_regnum (current_gdbarch)->hi, | |
69 | (const char *) (regp + CTX_MDHI) + gregoff); | |
70 | regcache_raw_supply (regcache, mips_regnum (current_gdbarch)->lo, | |
71 | (const char *) (regp + CTX_MDLO) + gregoff); | |
72 | regcache_raw_supply (regcache, mips_regnum (current_gdbarch)->cause, | |
73 | (const char *) (regp + CTX_CAUSE) + gregoff); | |
c906108c SS |
74 | |
75 | /* Fill inaccessible registers with zero. */ | |
7f7fe91e | 76 | regcache_raw_supply (regcache, mips_regnum (current_gdbarch)->badvaddr, zerobuf); |
c906108c SS |
77 | } |
78 | ||
79 | void | |
7f7fe91e | 80 | fill_gregset (const struct regcache *regcache, gregset_t *gregsetp, int regno) |
c906108c | 81 | { |
6a1872e4 | 82 | int regi, size; |
52f0bd74 | 83 | greg_t *regp = &(*gregsetp)[0]; |
6a1872e4 | 84 | gdb_byte buf[MAX_REGISTER_SIZE]; |
c906108c SS |
85 | |
86 | /* Under Irix6, if GDB is built with N32 ABI and is debugging an O32 | |
87 | executable, we have to sign extend the registers to 64 bits before | |
88 | filling in the gregset structure. */ | |
89 | ||
90 | for (regi = 0; regi <= CTX_RA; regi++) | |
91 | if ((regno == -1) || (regno == regi)) | |
44ed547b | 92 | { |
6a1872e4 | 93 | size = register_size (current_gdbarch, regi); |
7f7fe91e | 94 | regcache_raw_collect (regcache, regi, buf); |
6a1872e4 | 95 | *(regp + regi) = extract_signed_integer (buf, size); |
44ed547b | 96 | } |
c906108c SS |
97 | |
98 | if ((regno == -1) || (regno == PC_REGNUM)) | |
44ed547b | 99 | { |
6a1872e4 UW |
100 | regi = mips_regnum (current_gdbarch)->pc; |
101 | size = register_size (current_gdbarch, regi); | |
7f7fe91e | 102 | regcache_raw_collect (regcache, regi, buf); |
6a1872e4 | 103 | *(regp + CTX_EPC) = extract_signed_integer (buf, size); |
44ed547b | 104 | } |
c906108c | 105 | |
56cea623 | 106 | if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->cause)) |
44ed547b | 107 | { |
6a1872e4 UW |
108 | regi = mips_regnum (current_gdbarch)->cause; |
109 | size = register_size (current_gdbarch, regi); | |
7f7fe91e | 110 | regcache_raw_collect (regcache, regi, buf); |
6a1872e4 | 111 | *(regp + CTX_CAUSE) = extract_signed_integer (buf, size); |
44ed547b | 112 | } |
c906108c | 113 | |
6a1872e4 | 114 | if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->hi)) |
44ed547b | 115 | { |
6a1872e4 UW |
116 | regi = mips_regnum (current_gdbarch)->hi; |
117 | size = register_size (current_gdbarch, regi); | |
7f7fe91e | 118 | regcache_raw_collect (regcache, regi, buf); |
6a1872e4 | 119 | *(regp + CTX_MDHI) = extract_signed_integer (buf, size); |
44ed547b | 120 | } |
c906108c | 121 | |
56cea623 | 122 | if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->lo)) |
44ed547b | 123 | { |
6a1872e4 UW |
124 | regi = mips_regnum (current_gdbarch)->lo; |
125 | size = register_size (current_gdbarch, regi); | |
7f7fe91e | 126 | regcache_raw_collect (regcache, regi, buf); |
6a1872e4 | 127 | *(regp + CTX_MDLO) = extract_signed_integer (buf, size); |
44ed547b | 128 | } |
c906108c SS |
129 | } |
130 | ||
131 | /* | |
132 | * Now we do the same thing for floating-point registers. | |
133 | * We don't bother to condition on FP0_REGNUM since any | |
134 | * reasonable MIPS configuration has an R3010 in it. | |
135 | * | |
136 | * Again, see the comments in m68k-tdep.c. | |
137 | */ | |
138 | ||
139 | void | |
7f7fe91e | 140 | supply_fpregset (struct regcache *regcache, const fpregset_t *fpregsetp) |
c906108c | 141 | { |
52f0bd74 | 142 | int regi; |
466d7106 | 143 | static char zerobuf[32] = {0}; |
6d1eba4c | 144 | char fsrbuf[8]; |
c906108c SS |
145 | |
146 | /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */ | |
147 | ||
148 | for (regi = 0; regi < 32; regi++) | |
7f7fe91e UW |
149 | regcache_raw_supply (regcache, FP0_REGNUM + regi, |
150 | (const char *) &fpregsetp->fp_r.fp_regs[regi]); | |
c906108c | 151 | |
6d1eba4c JB |
152 | /* We can't supply the FSR register directly to the regcache, |
153 | because there is a size issue: On one hand, fpregsetp->fp_csr | |
154 | is 32bits long, while the regcache expects a 64bits long value. | |
155 | So we use a buffer of the correct size and copy into it the register | |
156 | value at the proper location. */ | |
157 | memset (fsrbuf, 0, 4); | |
158 | memcpy (fsrbuf + 4, &fpregsetp->fp_csr, 4); | |
159 | ||
7f7fe91e | 160 | regcache_raw_supply (regcache, |
23a6d369 | 161 | mips_regnum (current_gdbarch)->fp_control_status, |
6d1eba4c | 162 | fsrbuf); |
c906108c | 163 | |
56cea623 | 164 | /* FIXME: how can we supply FCRIR? SGI doesn't tell us. */ |
7f7fe91e | 165 | regcache_raw_supply (regcache, |
23a6d369 AC |
166 | mips_regnum (current_gdbarch)->fp_implementation_revision, |
167 | zerobuf); | |
c906108c SS |
168 | } |
169 | ||
170 | void | |
7f7fe91e | 171 | fill_fpregset (const struct regcache *regcache, fpregset_t *fpregsetp, int regno) |
c906108c SS |
172 | { |
173 | int regi; | |
174 | char *from, *to; | |
175 | ||
176 | /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */ | |
177 | ||
178 | for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++) | |
179 | { | |
180 | if ((regno == -1) || (regno == regi)) | |
181 | { | |
c906108c | 182 | to = (char *) &(fpregsetp->fp_r.fp_regs[regi - FP0_REGNUM]); |
7f7fe91e | 183 | regcache_raw_collect (regcache, regi, to); |
c906108c SS |
184 | } |
185 | } | |
186 | ||
6d1eba4c JB |
187 | if (regno == -1 |
188 | || regno == mips_regnum (current_gdbarch)->fp_control_status) | |
189 | { | |
190 | char fsrbuf[8]; | |
191 | ||
192 | /* We can't fill the FSR register directly from the regcache, | |
193 | because there is a size issue: On one hand, fpregsetp->fp_csr | |
194 | is 32bits long, while the regcache expects a 64bits long buffer. | |
195 | So we use a buffer of the correct size and copy the register | |
196 | value from that buffer. */ | |
7f7fe91e | 197 | regcache_raw_collect (regcache, |
6a1872e4 UW |
198 | mips_regnum (current_gdbarch)->fp_control_status, |
199 | fsrbuf); | |
6d1eba4c JB |
200 | |
201 | memcpy (&fpregsetp->fp_csr, fsrbuf + 4, 4); | |
202 | } | |
c906108c SS |
203 | } |
204 | ||
205 | ||
16bce26c KB |
206 | /* Provide registers to GDB from a core file. |
207 | ||
208 | CORE_REG_SECT points to an array of bytes, which were obtained from | |
209 | a core file which BFD thinks might contain register contents. | |
210 | CORE_REG_SIZE is its size. | |
211 | ||
212 | Normally, WHICH says which register set corelow suspects this is: | |
213 | 0 --- the general-purpose register set | |
214 | 2 --- the floating-point register set | |
215 | However, for Irix 5, WHICH isn't used. | |
216 | ||
217 | REG_ADDR is also unused. */ | |
218 | ||
c906108c | 219 | static void |
9eefc95f UW |
220 | fetch_core_registers (struct regcache *regcache, |
221 | char *core_reg_sect, unsigned core_reg_size, | |
16bce26c | 222 | int which, CORE_ADDR reg_addr) |
c906108c | 223 | { |
f6e1bffc | 224 | char *srcp = core_reg_sect; |
f58b68aa | 225 | int regsize = mips_isa_regsize (current_gdbarch); |
f6e1bffc JB |
226 | int regno; |
227 | ||
f58b68aa DJ |
228 | /* If regsize is 8, this is a N32 or N64 core file. |
229 | If regsize is 4, this is an O32 core file. */ | |
f57d151a | 230 | if (core_reg_size != regsize * gdbarch_num_regs (current_gdbarch)) |
c906108c | 231 | { |
8a3fe4f8 | 232 | warning (_("wrong size gregset struct in core file")); |
c906108c SS |
233 | return; |
234 | } | |
f58b68aa | 235 | |
f57d151a | 236 | for (regno = 0; regno < gdbarch_num_regs (current_gdbarch); regno++) |
f58b68aa | 237 | { |
9eefc95f | 238 | regcache_raw_supply (regcache, regno, srcp); |
f58b68aa DJ |
239 | srcp += regsize; |
240 | } | |
c906108c | 241 | } |
c5aa993b | 242 | |
c906108c SS |
243 | /* Register that we are able to handle irix5 core file formats. |
244 | This really is bfd_target_unknown_flavour */ | |
245 | ||
246 | static struct core_fns irix5_core_fns = | |
247 | { | |
2acceee2 JM |
248 | bfd_target_unknown_flavour, /* core_flavour */ |
249 | default_check_format, /* check_format */ | |
250 | default_core_sniffer, /* core_sniffer */ | |
251 | fetch_core_registers, /* core_read_registers */ | |
252 | NULL /* next */ | |
c906108c SS |
253 | }; |
254 | ||
255 | void | |
fba45db2 | 256 | _initialize_core_irix5 (void) |
c906108c | 257 | { |
00e32a35 | 258 | deprecated_add_core_fns (&irix5_core_fns); |
c906108c | 259 | } |