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" | |
b639a770 | 39 | #include "mips-tdep.h" |
c60c0f5f | 40 | |
a14ed312 | 41 | static void fetch_core_registers (char *, unsigned int, int, CORE_ADDR); |
c906108c SS |
42 | |
43 | /* Size of elements in jmpbuf */ | |
44 | ||
45 | #define JB_ELEMENT_SIZE 4 | |
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 |
fba45db2 | 55 | supply_gregset (gregset_t *gregsetp) |
c906108c | 56 | { |
52f0bd74 AC |
57 | int regi; |
58 | greg_t *regp = &(*gregsetp)[0]; | |
4246e332 | 59 | int gregoff = sizeof (greg_t) - mips_regsize (current_gdbarch); |
466d7106 | 60 | static char zerobuf[32] = {0}; |
c906108c | 61 | |
c5aa993b JM |
62 | for (regi = 0; regi <= CTX_RA; regi++) |
63 | supply_register (regi, (char *) (regp + regi) + gregoff); | |
c906108c | 64 | |
56cea623 AC |
65 | supply_register (mips_regnum (current_gdbarch)->pc, |
66 | (char *) (regp + CTX_EPC) + gregoff); | |
67 | supply_register (mips_regnum (current_gdbarch)->hi, | |
68 | (char *) (regp + CTX_MDHI) + gregoff); | |
69 | supply_register (mips_regnum (current_gdbarch)->lo, | |
70 | (char *) (regp + CTX_MDLO) + gregoff); | |
71 | supply_register (mips_regnum (current_gdbarch)->cause, | |
72 | (char *) (regp + CTX_CAUSE) + gregoff); | |
c906108c SS |
73 | |
74 | /* Fill inaccessible registers with zero. */ | |
56cea623 | 75 | supply_register (mips_regnum (current_gdbarch)->badvaddr, zerobuf); |
c906108c SS |
76 | } |
77 | ||
78 | void | |
fba45db2 | 79 | fill_gregset (gregset_t *gregsetp, int regno) |
c906108c SS |
80 | { |
81 | int regi; | |
52f0bd74 | 82 | greg_t *regp = &(*gregsetp)[0]; |
c906108c SS |
83 | |
84 | /* Under Irix6, if GDB is built with N32 ABI and is debugging an O32 | |
85 | executable, we have to sign extend the registers to 64 bits before | |
86 | filling in the gregset structure. */ | |
87 | ||
88 | for (regi = 0; regi <= CTX_RA; regi++) | |
89 | if ((regno == -1) || (regno == regi)) | |
90 | *(regp + regi) = | |
62700349 | 91 | extract_signed_integer (&deprecated_registers[DEPRECATED_REGISTER_BYTE (regi)], |
12c266ea | 92 | DEPRECATED_REGISTER_RAW_SIZE (regi)); |
c906108c SS |
93 | |
94 | if ((regno == -1) || (regno == PC_REGNUM)) | |
95 | *(regp + CTX_EPC) = | |
56cea623 AC |
96 | extract_signed_integer (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->pc)], |
97 | DEPRECATED_REGISTER_RAW_SIZE (mips_regnum (current_gdbarch)->pc)); | |
c906108c | 98 | |
56cea623 | 99 | if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->cause)) |
c906108c | 100 | *(regp + CTX_CAUSE) = |
56cea623 AC |
101 | extract_signed_integer (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->cause)], |
102 | DEPRECATED_REGISTER_RAW_SIZE (mips_regnum (current_gdbarch)->cause)); | |
c906108c | 103 | |
56cea623 AC |
104 | if ((regno == -1) |
105 | || (regno == mips_regnum (current_gdbarch)->hi)) | |
c906108c | 106 | *(regp + CTX_MDHI) = |
56cea623 AC |
107 | extract_signed_integer (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->hi)], |
108 | DEPRECATED_REGISTER_RAW_SIZE (mips_regnum (current_gdbarch)->hi)); | |
c906108c | 109 | |
56cea623 | 110 | if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->lo)) |
c906108c | 111 | *(regp + CTX_MDLO) = |
56cea623 AC |
112 | extract_signed_integer (&deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->lo)], |
113 | DEPRECATED_REGISTER_RAW_SIZE (mips_regnum (current_gdbarch)->lo)); | |
c906108c SS |
114 | } |
115 | ||
116 | /* | |
117 | * Now we do the same thing for floating-point registers. | |
118 | * We don't bother to condition on FP0_REGNUM since any | |
119 | * reasonable MIPS configuration has an R3010 in it. | |
120 | * | |
121 | * Again, see the comments in m68k-tdep.c. | |
122 | */ | |
123 | ||
124 | void | |
fba45db2 | 125 | supply_fpregset (fpregset_t *fpregsetp) |
c906108c | 126 | { |
52f0bd74 | 127 | int regi; |
466d7106 | 128 | static char zerobuf[32] = {0}; |
c906108c SS |
129 | |
130 | /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */ | |
131 | ||
132 | for (regi = 0; regi < 32; regi++) | |
133 | supply_register (FP0_REGNUM + regi, | |
c5aa993b | 134 | (char *) &fpregsetp->fp_r.fp_regs[regi]); |
c906108c | 135 | |
56cea623 AC |
136 | supply_register (mips_regnum (current_gdbarch)->fp_control_status, |
137 | (char *) &fpregsetp->fp_csr); | |
c906108c | 138 | |
56cea623 AC |
139 | /* FIXME: how can we supply FCRIR? SGI doesn't tell us. */ |
140 | supply_register (mips_regnum (current_gdbarch)->fp_implementation_revision, | |
141 | zerobuf); | |
c906108c SS |
142 | } |
143 | ||
144 | void | |
fba45db2 | 145 | fill_fpregset (fpregset_t *fpregsetp, int regno) |
c906108c SS |
146 | { |
147 | int regi; | |
148 | char *from, *to; | |
149 | ||
150 | /* FIXME, this is wrong for the N32 ABI which has 64 bit FP regs. */ | |
151 | ||
152 | for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++) | |
153 | { | |
154 | if ((regno == -1) || (regno == regi)) | |
155 | { | |
62700349 | 156 | from = (char *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (regi)]; |
c906108c | 157 | to = (char *) &(fpregsetp->fp_r.fp_regs[regi - FP0_REGNUM]); |
12c266ea | 158 | memcpy (to, from, DEPRECATED_REGISTER_RAW_SIZE (regi)); |
c906108c SS |
159 | } |
160 | } | |
161 | ||
56cea623 AC |
162 | if ((regno == -1) |
163 | || (regno == mips_regnum (current_gdbarch)->fp_control_status)) | |
164 | fpregsetp->fp_csr = *(unsigned *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->fp_control_status)]; | |
c906108c SS |
165 | } |
166 | ||
167 | ||
168 | /* Figure out where the longjmp will land. | |
169 | We expect the first arg to be a pointer to the jmp_buf structure from which | |
170 | we extract the pc (JB_PC) that we will land at. The pc is copied into PC. | |
171 | This routine returns true on success. */ | |
172 | ||
173 | int | |
fba45db2 | 174 | get_longjmp_target (CORE_ADDR *pc) |
c906108c | 175 | { |
35fc8285 | 176 | char *buf; |
c906108c SS |
177 | CORE_ADDR jb_addr; |
178 | ||
35fc8285 | 179 | buf = alloca (TARGET_PTR_BIT / TARGET_CHAR_BIT); |
c906108c SS |
180 | jb_addr = read_register (A0_REGNUM); |
181 | ||
182 | if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, buf, | |
183 | TARGET_PTR_BIT / TARGET_CHAR_BIT)) | |
184 | return 0; | |
185 | ||
7c0b4a20 | 186 | *pc = extract_unsigned_integer (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT); |
c906108c SS |
187 | |
188 | return 1; | |
189 | } | |
190 | ||
16bce26c KB |
191 | /* Provide registers to GDB from a core file. |
192 | ||
193 | CORE_REG_SECT points to an array of bytes, which were obtained from | |
194 | a core file which BFD thinks might contain register contents. | |
195 | CORE_REG_SIZE is its size. | |
196 | ||
197 | Normally, WHICH says which register set corelow suspects this is: | |
198 | 0 --- the general-purpose register set | |
199 | 2 --- the floating-point register set | |
200 | However, for Irix 5, WHICH isn't used. | |
201 | ||
202 | REG_ADDR is also unused. */ | |
203 | ||
c906108c | 204 | static void |
16bce26c KB |
205 | fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, |
206 | int which, CORE_ADDR reg_addr) | |
c906108c | 207 | { |
b8b527c5 | 208 | if (core_reg_size == DEPRECATED_REGISTER_BYTES) |
c906108c | 209 | { |
524d7c18 | 210 | memcpy ((char *) deprecated_registers, core_reg_sect, core_reg_size); |
c906108c | 211 | } |
4246e332 AC |
212 | else if (mips_regsize (current_gdbarch) == 4 && |
213 | core_reg_size == (2 * mips_regsize (current_gdbarch)) * NUM_REGS) | |
c906108c SS |
214 | { |
215 | /* This is a core file from a N32 executable, 64 bits are saved | |
c5aa993b | 216 | for all registers. */ |
c906108c | 217 | char *srcp = core_reg_sect; |
524d7c18 | 218 | char *dstp = deprecated_registers; |
c906108c SS |
219 | int regno; |
220 | ||
221 | for (regno = 0; regno < NUM_REGS; regno++) | |
222 | { | |
223 | if (regno >= FP0_REGNUM && regno < (FP0_REGNUM + 32)) | |
224 | { | |
225 | /* FIXME, this is wrong, N32 has 64 bit FP regs, but GDB | |
c5aa993b | 226 | currently assumes that they are 32 bit. */ |
c906108c SS |
227 | *dstp++ = *srcp++; |
228 | *dstp++ = *srcp++; | |
229 | *dstp++ = *srcp++; | |
230 | *dstp++ = *srcp++; | |
12c266ea | 231 | if (DEPRECATED_REGISTER_RAW_SIZE (regno) == 4) |
c906108c SS |
232 | { |
233 | /* copying 4 bytes from eight bytes? | |
234 | I don't see how this can be right... */ | |
c5aa993b | 235 | srcp += 4; |
c906108c SS |
236 | } |
237 | else | |
238 | { | |
239 | /* copy all 8 bytes (sizeof(double)) */ | |
240 | *dstp++ = *srcp++; | |
241 | *dstp++ = *srcp++; | |
242 | *dstp++ = *srcp++; | |
243 | *dstp++ = *srcp++; | |
244 | } | |
245 | } | |
246 | else | |
247 | { | |
248 | srcp += 4; | |
249 | *dstp++ = *srcp++; | |
250 | *dstp++ = *srcp++; | |
251 | *dstp++ = *srcp++; | |
252 | *dstp++ = *srcp++; | |
253 | } | |
254 | } | |
255 | } | |
256 | else | |
257 | { | |
258 | warning ("wrong size gregset struct in core file"); | |
259 | return; | |
260 | } | |
261 | ||
2b9e5f3f | 262 | deprecated_registers_fetched (); |
c906108c | 263 | } |
c5aa993b | 264 | |
c906108c SS |
265 | /* Register that we are able to handle irix5 core file formats. |
266 | This really is bfd_target_unknown_flavour */ | |
267 | ||
268 | static struct core_fns irix5_core_fns = | |
269 | { | |
2acceee2 JM |
270 | bfd_target_unknown_flavour, /* core_flavour */ |
271 | default_check_format, /* check_format */ | |
272 | default_core_sniffer, /* core_sniffer */ | |
273 | fetch_core_registers, /* core_read_registers */ | |
274 | NULL /* next */ | |
c906108c SS |
275 | }; |
276 | ||
277 | void | |
fba45db2 | 278 | _initialize_core_irix5 (void) |
c906108c SS |
279 | { |
280 | add_core_fns (&irix5_core_fns); | |
281 | } |