Commit | Line | Data |
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c906108c | 1 | /* Native support for the SGI Iris running IRIX version 5, for GDB. |
b6ba6518 | 2 | Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, |
dabbe2c0 | 3 | 1999, 2000, 2001, 2002 Free Software Foundation, Inc. |
c906108c SS |
4 | Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU |
5 | and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin. | |
6 | Implemented for Irix 4.x by Garrett A. Wollman. | |
7 | Modified for Irix 5.x by Ian Lance Taylor. | |
8 | ||
c5aa993b | 9 | This file is part of GDB. |
c906108c | 10 | |
c5aa993b JM |
11 | This program is free software; you can redistribute it and/or modify |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation; either version 2 of the License, or | |
14 | (at your option) any later version. | |
c906108c | 15 | |
c5aa993b JM |
16 | This program is distributed in the hope that it will be useful, |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
c906108c | 20 | |
c5aa993b JM |
21 | You should have received a copy of the GNU General Public License |
22 | along with this program; if not, write to the Free Software | |
23 | Foundation, Inc., 59 Temple Place - Suite 330, | |
24 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
25 | |
26 | #include "defs.h" | |
27 | #include "inferior.h" | |
28 | #include "gdbcore.h" | |
29 | #include "target.h" | |
4e052eda | 30 | #include "regcache.h" |
c906108c SS |
31 | |
32 | #include "gdb_string.h" | |
33 | #include <sys/time.h> | |
34 | #include <sys/procfs.h> | |
35 | #include <setjmp.h> /* For JB_XXX. */ | |
36 | ||
c60c0f5f MS |
37 | /* Prototypes for supply_gregset etc. */ |
38 | #include "gregset.h" | |
39 | ||
a14ed312 | 40 | static void fetch_core_registers (char *, unsigned int, int, CORE_ADDR); |
c906108c SS |
41 | |
42 | /* Size of elements in jmpbuf */ | |
43 | ||
44 | #define JB_ELEMENT_SIZE 4 | |
45 | ||
46 | /* | |
47 | * See the comment in m68k-tdep.c regarding the utility of these functions. | |
48 | * | |
49 | * These definitions are from the MIPS SVR4 ABI, so they may work for | |
50 | * any MIPS SVR4 target. | |
51 | */ | |
52 | ||
c5aa993b | 53 | void |
fba45db2 | 54 | supply_gregset (gregset_t *gregsetp) |
c906108c | 55 | { |
52f0bd74 AC |
56 | int regi; |
57 | greg_t *regp = &(*gregsetp)[0]; | |
4246e332 | 58 | int gregoff = sizeof (greg_t) - mips_regsize (current_gdbarch); |
466d7106 | 59 | static char zerobuf[32] = {0}; |
c906108c | 60 | |
c5aa993b JM |
61 | for (regi = 0; regi <= CTX_RA; regi++) |
62 | supply_register (regi, (char *) (regp + regi) + gregoff); | |
c906108c | 63 | |
56cea623 AC |
64 | supply_register (mips_regnum (current_gdbarch)->pc, |
65 | (char *) (regp + CTX_EPC) + gregoff); | |
66 | supply_register (mips_regnum (current_gdbarch)->hi, | |
67 | (char *) (regp + CTX_MDHI) + gregoff); | |
68 | supply_register (mips_regnum (current_gdbarch)->lo, | |
69 | (char *) (regp + CTX_MDLO) + gregoff); | |
70 | supply_register (mips_regnum (current_gdbarch)->cause, | |
71 | (char *) (regp + CTX_CAUSE) + gregoff); | |
c906108c SS |
72 | |
73 | /* Fill inaccessible registers with zero. */ | |
56cea623 | 74 | supply_register (mips_regnum (current_gdbarch)->badvaddr, zerobuf); |
c906108c SS |
75 | } |
76 | ||
77 | void | |
fba45db2 | 78 | fill_gregset (gregset_t *gregsetp, int regno) |
c906108c SS |
79 | { |
80 | int regi; | |
52f0bd74 | 81 | greg_t *regp = &(*gregsetp)[0]; |
c906108c SS |
82 | |
83 | /* Under Irix6, if GDB is built with N32 ABI and is debugging an O32 | |
84 | executable, we have to sign extend the registers to 64 bits before | |
85 | filling in the gregset structure. */ | |
86 | ||
87 | for (regi = 0; regi <= CTX_RA; regi++) | |
88 | if ((regno == -1) || (regno == regi)) | |
89 | *(regp + regi) = | |
62700349 | 90 | extract_signed_integer (&deprecated_registers[DEPRECATED_REGISTER_BYTE (regi)], |
12c266ea | 91 | DEPRECATED_REGISTER_RAW_SIZE (regi)); |
c906108c SS |
92 | |
93 | if ((regno == -1) || (regno == PC_REGNUM)) | |
94 | *(regp + CTX_EPC) = | |
56cea623 AC |
95 | extract_signed_integer (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->pc)], |
96 | DEPRECATED_REGISTER_RAW_SIZE (mips_regnum (current_gdbarch)->pc)); | |
c906108c | 97 | |
56cea623 | 98 | if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->cause)) |
c906108c | 99 | *(regp + CTX_CAUSE) = |
56cea623 AC |
100 | extract_signed_integer (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->cause)], |
101 | DEPRECATED_REGISTER_RAW_SIZE (mips_regnum (current_gdbarch)->cause)); | |
c906108c | 102 | |
56cea623 AC |
103 | if ((regno == -1) |
104 | || (regno == mips_regnum (current_gdbarch)->hi)) | |
c906108c | 105 | *(regp + CTX_MDHI) = |
56cea623 AC |
106 | extract_signed_integer (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->hi)], |
107 | DEPRECATED_REGISTER_RAW_SIZE (mips_regnum (current_gdbarch)->hi)); | |
c906108c | 108 | |
56cea623 | 109 | if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->lo)) |
c906108c | 110 | *(regp + CTX_MDLO) = |
56cea623 AC |
111 | extract_signed_integer (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->lo)], |
112 | DEPRECATED_REGISTER_RAW_SIZE (mips_regnum (current_gdbarch)->lo)); | |
c906108c SS |
113 | } |
114 | ||
115 | /* | |
116 | * Now we do the same thing for floating-point registers. | |
117 | * We don't bother to condition on FP0_REGNUM since any | |
118 | * reasonable MIPS configuration has an R3010 in it. | |
119 | * | |
120 | * Again, see the comments in m68k-tdep.c. | |
121 | */ | |
122 | ||
123 | void | |
fba45db2 | 124 | supply_fpregset (fpregset_t *fpregsetp) |
c906108c | 125 | { |
52f0bd74 | 126 | int regi; |
466d7106 | 127 | static char zerobuf[32] = {0}; |
c906108c SS |
128 | |
129 | /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */ | |
130 | ||
131 | for (regi = 0; regi < 32; regi++) | |
132 | supply_register (FP0_REGNUM + regi, | |
c5aa993b | 133 | (char *) &fpregsetp->fp_r.fp_regs[regi]); |
c906108c | 134 | |
56cea623 AC |
135 | supply_register (mips_regnum (current_gdbarch)->fp_control_status, |
136 | (char *) &fpregsetp->fp_csr); | |
c906108c | 137 | |
56cea623 AC |
138 | /* FIXME: how can we supply FCRIR? SGI doesn't tell us. */ |
139 | supply_register (mips_regnum (current_gdbarch)->fp_implementation_revision, | |
140 | zerobuf); | |
c906108c SS |
141 | } |
142 | ||
143 | void | |
fba45db2 | 144 | fill_fpregset (fpregset_t *fpregsetp, int regno) |
c906108c SS |
145 | { |
146 | int regi; | |
147 | char *from, *to; | |
148 | ||
149 | /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */ | |
150 | ||
151 | for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++) | |
152 | { | |
153 | if ((regno == -1) || (regno == regi)) | |
154 | { | |
62700349 | 155 | from = (char *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (regi)]; |
c906108c | 156 | to = (char *) &(fpregsetp->fp_r.fp_regs[regi - FP0_REGNUM]); |
12c266ea | 157 | memcpy (to, from, DEPRECATED_REGISTER_RAW_SIZE (regi)); |
c906108c SS |
158 | } |
159 | } | |
160 | ||
56cea623 AC |
161 | if ((regno == -1) |
162 | || (regno == mips_regnum (current_gdbarch)->fp_control_status)) | |
163 | fpregsetp->fp_csr = *(unsigned *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->fp_control_status)]; | |
c906108c SS |
164 | } |
165 | ||
166 | ||
167 | /* Figure out where the longjmp will land. | |
168 | We expect the first arg to be a pointer to the jmp_buf structure from which | |
169 | we extract the pc (JB_PC) that we will land at. The pc is copied into PC. | |
170 | This routine returns true on success. */ | |
171 | ||
172 | int | |
fba45db2 | 173 | get_longjmp_target (CORE_ADDR *pc) |
c906108c | 174 | { |
35fc8285 | 175 | char *buf; |
c906108c SS |
176 | CORE_ADDR jb_addr; |
177 | ||
35fc8285 | 178 | buf = alloca (TARGET_PTR_BIT / TARGET_CHAR_BIT); |
c906108c SS |
179 | jb_addr = read_register (A0_REGNUM); |
180 | ||
181 | if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, buf, | |
182 | TARGET_PTR_BIT / TARGET_CHAR_BIT)) | |
183 | return 0; | |
184 | ||
7c0b4a20 | 185 | *pc = extract_unsigned_integer (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT); |
c906108c SS |
186 | |
187 | return 1; | |
188 | } | |
189 | ||
16bce26c KB |
190 | /* Provide registers to GDB from a core file. |
191 | ||
192 | CORE_REG_SECT points to an array of bytes, which were obtained from | |
193 | a core file which BFD thinks might contain register contents. | |
194 | CORE_REG_SIZE is its size. | |
195 | ||
196 | Normally, WHICH says which register set corelow suspects this is: | |
197 | 0 --- the general-purpose register set | |
198 | 2 --- the floating-point register set | |
199 | However, for Irix 5, WHICH isn't used. | |
200 | ||
201 | REG_ADDR is also unused. */ | |
202 | ||
c906108c | 203 | static void |
16bce26c KB |
204 | fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, |
205 | int which, CORE_ADDR reg_addr) | |
c906108c | 206 | { |
b8b527c5 | 207 | if (core_reg_size == DEPRECATED_REGISTER_BYTES) |
c906108c | 208 | { |
524d7c18 | 209 | memcpy ((char *) deprecated_registers, core_reg_sect, core_reg_size); |
c906108c | 210 | } |
4246e332 AC |
211 | else if (mips_regsize (current_gdbarch) == 4 && |
212 | core_reg_size == (2 * mips_regsize (current_gdbarch)) * NUM_REGS) | |
c906108c SS |
213 | { |
214 | /* This is a core file from a N32 executable, 64 bits are saved | |
c5aa993b | 215 | for all registers. */ |
c906108c | 216 | char *srcp = core_reg_sect; |
524d7c18 | 217 | char *dstp = deprecated_registers; |
c906108c SS |
218 | int regno; |
219 | ||
220 | for (regno = 0; regno < NUM_REGS; regno++) | |
221 | { | |
222 | if (regno >= FP0_REGNUM && regno < (FP0_REGNUM + 32)) | |
223 | { | |
224 | /* FIXME, this is wrong, N32 has 64 bit FP regs, but GDB | |
c5aa993b | 225 | currently assumes that they are 32 bit. */ |
c906108c SS |
226 | *dstp++ = *srcp++; |
227 | *dstp++ = *srcp++; | |
228 | *dstp++ = *srcp++; | |
229 | *dstp++ = *srcp++; | |
12c266ea | 230 | if (DEPRECATED_REGISTER_RAW_SIZE (regno) == 4) |
c906108c SS |
231 | { |
232 | /* copying 4 bytes from eight bytes? | |
233 | I don't see how this can be right... */ | |
c5aa993b | 234 | srcp += 4; |
c906108c SS |
235 | } |
236 | else | |
237 | { | |
238 | /* copy all 8 bytes (sizeof(double)) */ | |
239 | *dstp++ = *srcp++; | |
240 | *dstp++ = *srcp++; | |
241 | *dstp++ = *srcp++; | |
242 | *dstp++ = *srcp++; | |
243 | } | |
244 | } | |
245 | else | |
246 | { | |
247 | srcp += 4; | |
248 | *dstp++ = *srcp++; | |
249 | *dstp++ = *srcp++; | |
250 | *dstp++ = *srcp++; | |
251 | *dstp++ = *srcp++; | |
252 | } | |
253 | } | |
254 | } | |
255 | else | |
256 | { | |
257 | warning ("wrong size gregset struct in core file"); | |
258 | return; | |
259 | } | |
260 | ||
2b9e5f3f | 261 | deprecated_registers_fetched (); |
c906108c | 262 | } |
c5aa993b | 263 | |
c906108c SS |
264 | /* Register that we are able to handle irix5 core file formats. |
265 | This really is bfd_target_unknown_flavour */ | |
266 | ||
267 | static struct core_fns irix5_core_fns = | |
268 | { | |
2acceee2 JM |
269 | bfd_target_unknown_flavour, /* core_flavour */ |
270 | default_check_format, /* check_format */ | |
271 | default_core_sniffer, /* core_sniffer */ | |
272 | fetch_core_registers, /* core_read_registers */ | |
273 | NULL /* next */ | |
c906108c SS |
274 | }; |
275 | ||
276 | void | |
fba45db2 | 277 | _initialize_core_irix5 (void) |
c906108c SS |
278 | { |
279 | add_core_fns (&irix5_core_fns); | |
280 | } |