Commit | Line | Data |
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c906108c | 1 | /* Functions specific to running gdb native on a SPARC running SunOS4. |
b6ba6518 KB |
2 | Copyright 1989, 1992, 1993, 1994, 1996, 1997, 1998, 1999, 2000, 2001 |
3 | Free Software Foundation, Inc. | |
c906108c | 4 | |
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
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. | |
c906108c | 11 | |
c5aa993b JM |
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. | |
c906108c | 16 | |
c5aa993b JM |
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. */ | |
c906108c SS |
21 | |
22 | #include "defs.h" | |
23 | #include "inferior.h" | |
24 | #include "target.h" | |
25 | #include "gdbcore.h" | |
4e052eda | 26 | #include "regcache.h" |
c906108c | 27 | |
7781cd62 DB |
28 | #ifdef HAVE_SYS_PARAM_H |
29 | #include <sys/param.h> | |
30 | #endif | |
c906108c SS |
31 | #include <signal.h> |
32 | #include <sys/ptrace.h> | |
33 | #include <sys/wait.h> | |
34 | #ifdef __linux__ | |
35 | #include <asm/reg.h> | |
36 | #else | |
37 | #include <machine/reg.h> | |
38 | #endif | |
39 | #include <sys/user.h> | |
40 | ||
41 | /* We don't store all registers immediately when requested, since they | |
42 | get sent over in large chunks anyway. Instead, we accumulate most | |
43 | of the changes and send them over once. "deferred_stores" keeps | |
44 | track of which sets of registers we have locally-changed copies of, | |
45 | so we only need send the groups that have changed. */ | |
46 | ||
47 | #define INT_REGS 1 | |
48 | #define STACK_REGS 2 | |
49 | #define FP_REGS 4 | |
50 | ||
c906108c SS |
51 | /* Fetch one or more registers from the inferior. REGNO == -1 to get |
52 | them all. We actually fetch more than requested, when convenient, | |
53 | marking them as valid so we won't fetch them again. */ | |
54 | ||
55 | void | |
fba45db2 | 56 | fetch_inferior_registers (int regno) |
c906108c SS |
57 | { |
58 | struct regs inferior_registers; | |
59 | struct fp_status inferior_fp_registers; | |
60 | int i; | |
61 | ||
62 | /* We should never be called with deferred stores, because a prerequisite | |
63 | for writing regs is to have fetched them all (PREPARE_TO_STORE), sigh. */ | |
c5aa993b | 64 | if (deferred_stores) |
e1e9e218 | 65 | internal_error (__FILE__, __LINE__, "failed internal consistency check"); |
c906108c SS |
66 | |
67 | DO_DEFERRED_STORES; | |
68 | ||
69 | /* Global and Out regs are fetched directly, as well as the control | |
70 | registers. If we're getting one of the in or local regs, | |
71 | and the stack pointer has not yet been fetched, | |
72 | we have to do that first, since they're found in memory relative | |
73 | to the stack pointer. */ | |
c5aa993b | 74 | if (regno < O7_REGNUM /* including -1 */ |
c906108c | 75 | || regno >= Y_REGNUM |
8262ee23 | 76 | || (!deprecated_register_valid[SP_REGNUM] && regno < I7_REGNUM)) |
c906108c | 77 | { |
39f77062 | 78 | if (0 != ptrace (PTRACE_GETREGS, PIDGET (inferior_ptid), |
c5aa993b JM |
79 | (PTRACE_ARG3_TYPE) & inferior_registers, 0)) |
80 | perror ("ptrace_getregs"); | |
81 | ||
524d7c18 AC |
82 | deprecated_registers[REGISTER_BYTE (0)] = 0; |
83 | memcpy (&deprecated_registers[REGISTER_BYTE (1)], | |
84 | &inferior_registers.r_g1, 15 * REGISTER_RAW_SIZE (G0_REGNUM)); | |
85 | *(int *) &deprecated_registers[REGISTER_BYTE (PS_REGNUM)] | |
86 | = inferior_registers.r_ps; | |
87 | *(int *) &deprecated_registers[REGISTER_BYTE (PC_REGNUM)] | |
88 | = inferior_registers.r_pc; | |
89 | *(int *) &deprecated_registers[REGISTER_BYTE (NPC_REGNUM)] | |
90 | = inferior_registers.r_npc; | |
c5aa993b | 91 | *(int *) ®isters[REGISTER_BYTE (Y_REGNUM)] = inferior_registers.r_y; |
c906108c SS |
92 | |
93 | for (i = G0_REGNUM; i <= O7_REGNUM; i++) | |
8262ee23 AC |
94 | deprecated_register_valid[i] = 1; |
95 | deprecated_register_valid[Y_REGNUM] = 1; | |
96 | deprecated_register_valid[PS_REGNUM] = 1; | |
97 | deprecated_register_valid[PC_REGNUM] = 1; | |
98 | deprecated_register_valid[NPC_REGNUM] = 1; | |
c906108c | 99 | /* If we don't set these valid, read_register_bytes() rereads |
c5aa993b | 100 | all the regs every time it is called! FIXME. */ |
8262ee23 AC |
101 | deprecated_register_valid[WIM_REGNUM] = 1; /* Not true yet, FIXME */ |
102 | deprecated_register_valid[TBR_REGNUM] = 1; /* Not true yet, FIXME */ | |
103 | deprecated_register_valid[CPS_REGNUM] = 1; /* Not true yet, FIXME */ | |
c906108c SS |
104 | } |
105 | ||
106 | /* Floating point registers */ | |
107 | if (regno == -1 || | |
108 | regno == FPS_REGNUM || | |
109 | (regno >= FP0_REGNUM && regno <= FP0_REGNUM + 31)) | |
110 | { | |
39f77062 | 111 | if (0 != ptrace (PTRACE_GETFPREGS, PIDGET (inferior_ptid), |
c5aa993b | 112 | (PTRACE_ARG3_TYPE) & inferior_fp_registers, |
c906108c | 113 | 0)) |
c5aa993b | 114 | perror ("ptrace_getfpregs"); |
524d7c18 AC |
115 | memcpy (&deprecated_registers[REGISTER_BYTE (FP0_REGNUM)], |
116 | &inferior_fp_registers, sizeof inferior_fp_registers.fpu_fr); | |
117 | memcpy (&deprecated_registers[REGISTER_BYTE (FPS_REGNUM)], | |
118 | &inferior_fp_registers.Fpu_fsr, sizeof (FPU_FSR_TYPE)); | |
c5aa993b | 119 | for (i = FP0_REGNUM; i <= FP0_REGNUM + 31; i++) |
8262ee23 AC |
120 | deprecated_register_valid[i] = 1; |
121 | deprecated_register_valid[FPS_REGNUM] = 1; | |
c906108c SS |
122 | } |
123 | ||
124 | /* These regs are saved on the stack by the kernel. Only read them | |
125 | all (16 ptrace calls!) if we really need them. */ | |
126 | if (regno == -1) | |
127 | { | |
524d7c18 AC |
128 | CORE_ADDR sp = *(unsigned int *) & deprecated_registers[REGISTER_BYTE (SP_REGNUM)]; |
129 | target_read_memory (sp, &deprecated_registers[REGISTER_BYTE (L0_REGNUM)], | |
c5aa993b | 130 | 16 * REGISTER_RAW_SIZE (L0_REGNUM)); |
c906108c | 131 | for (i = L0_REGNUM; i <= I7_REGNUM; i++) |
8262ee23 | 132 | deprecated_register_valid[i] = 1; |
c906108c SS |
133 | } |
134 | else if (regno >= L0_REGNUM && regno <= I7_REGNUM) | |
135 | { | |
524d7c18 | 136 | CORE_ADDR sp = *(unsigned int *) & deprecated_registers[REGISTER_BYTE (SP_REGNUM)]; |
c906108c | 137 | i = REGISTER_BYTE (regno); |
8262ee23 | 138 | if (deprecated_register_valid[regno]) |
c5aa993b | 139 | printf_unfiltered ("register %d valid and read\n", regno); |
c906108c | 140 | target_read_memory (sp + i - REGISTER_BYTE (L0_REGNUM), |
524d7c18 | 141 | &deprecated_registers[i], REGISTER_RAW_SIZE (regno)); |
8262ee23 | 142 | deprecated_register_valid[regno] = 1; |
c906108c SS |
143 | } |
144 | } | |
145 | ||
146 | /* Store our register values back into the inferior. | |
147 | If REGNO is -1, do this for all registers. | |
148 | Otherwise, REGNO specifies which register (so we can save time). */ | |
149 | ||
150 | void | |
fba45db2 | 151 | store_inferior_registers (int regno) |
c906108c SS |
152 | { |
153 | struct regs inferior_registers; | |
154 | struct fp_status inferior_fp_registers; | |
155 | int wanna_store = INT_REGS + STACK_REGS + FP_REGS; | |
156 | ||
157 | /* First decide which pieces of machine-state we need to modify. | |
158 | Default for regno == -1 case is all pieces. */ | |
159 | if (regno >= 0) | |
e1925118 DM |
160 | { |
161 | if (FP0_REGNUM <= regno && regno < FP0_REGNUM + 32) | |
162 | { | |
c906108c | 163 | wanna_store = FP_REGS; |
e1925118 DM |
164 | } |
165 | else | |
166 | { | |
167 | if (regno == SP_REGNUM) | |
168 | wanna_store = INT_REGS + STACK_REGS; | |
169 | else if (regno < L0_REGNUM || regno > I7_REGNUM) | |
170 | wanna_store = INT_REGS; | |
171 | else if (regno == FPS_REGNUM) | |
172 | wanna_store = FP_REGS; | |
173 | else | |
174 | wanna_store = STACK_REGS; | |
175 | } | |
176 | } | |
c906108c SS |
177 | |
178 | /* See if we're forcing the stores to happen now, or deferring. */ | |
179 | if (regno == -2) | |
180 | { | |
181 | wanna_store = deferred_stores; | |
182 | deferred_stores = 0; | |
183 | } | |
184 | else | |
185 | { | |
186 | if (wanna_store == STACK_REGS) | |
187 | { | |
188 | /* Fall through and just store one stack reg. If we deferred | |
189 | it, we'd have to store them all, or remember more info. */ | |
190 | } | |
191 | else | |
192 | { | |
193 | deferred_stores |= wanna_store; | |
194 | return; | |
195 | } | |
196 | } | |
197 | ||
198 | if (wanna_store & STACK_REGS) | |
199 | { | |
524d7c18 | 200 | CORE_ADDR sp = *(unsigned int *) & deprecated_registers[REGISTER_BYTE (SP_REGNUM)]; |
c906108c SS |
201 | |
202 | if (regno < 0 || regno == SP_REGNUM) | |
203 | { | |
8262ee23 | 204 | if (!deprecated_register_valid[L0_REGNUM + 5]) |
e1e9e218 | 205 | internal_error (__FILE__, __LINE__, "failed internal consistency check"); |
c5aa993b | 206 | target_write_memory (sp, |
524d7c18 | 207 | &deprecated_registers[REGISTER_BYTE (L0_REGNUM)], |
c5aa993b | 208 | 16 * REGISTER_RAW_SIZE (L0_REGNUM)); |
c906108c SS |
209 | } |
210 | else | |
211 | { | |
8262ee23 | 212 | if (!deprecated_register_valid[regno]) |
e1e9e218 | 213 | internal_error (__FILE__, __LINE__, "failed internal consistency check"); |
c906108c | 214 | target_write_memory (sp + REGISTER_BYTE (regno) - REGISTER_BYTE (L0_REGNUM), |
524d7c18 | 215 | &deprecated_registers[REGISTER_BYTE (regno)], |
c906108c SS |
216 | REGISTER_RAW_SIZE (regno)); |
217 | } | |
c5aa993b | 218 | |
c906108c SS |
219 | } |
220 | ||
221 | if (wanna_store & INT_REGS) | |
222 | { | |
8262ee23 | 223 | if (!deprecated_register_valid[G1_REGNUM]) |
e1e9e218 | 224 | internal_error (__FILE__, __LINE__, "failed internal consistency check"); |
c906108c | 225 | |
524d7c18 AC |
226 | memcpy (&inferior_registers.r_g1, |
227 | &deprecated_registers[REGISTER_BYTE (G1_REGNUM)], | |
c906108c SS |
228 | 15 * REGISTER_RAW_SIZE (G1_REGNUM)); |
229 | ||
230 | inferior_registers.r_ps = | |
524d7c18 | 231 | *(int *) &deprecated_registers[REGISTER_BYTE (PS_REGNUM)]; |
c906108c | 232 | inferior_registers.r_pc = |
524d7c18 | 233 | *(int *) &deprecated_registers[REGISTER_BYTE (PC_REGNUM)]; |
c906108c | 234 | inferior_registers.r_npc = |
524d7c18 | 235 | *(int *) &deprecated_registers[REGISTER_BYTE (NPC_REGNUM)]; |
c906108c | 236 | inferior_registers.r_y = |
524d7c18 | 237 | *(int *) &deprecated_registers[REGISTER_BYTE (Y_REGNUM)]; |
c906108c | 238 | |
39f77062 | 239 | if (0 != ptrace (PTRACE_SETREGS, PIDGET (inferior_ptid), |
c5aa993b JM |
240 | (PTRACE_ARG3_TYPE) & inferior_registers, 0)) |
241 | perror ("ptrace_setregs"); | |
c906108c SS |
242 | } |
243 | ||
244 | if (wanna_store & FP_REGS) | |
245 | { | |
8262ee23 | 246 | if (!deprecated_register_valid[FP0_REGNUM + 9]) |
e1e9e218 | 247 | internal_error (__FILE__, __LINE__, "failed internal consistency check"); |
524d7c18 AC |
248 | memcpy (&inferior_fp_registers, |
249 | &deprecated_registers[REGISTER_BYTE (FP0_REGNUM)], | |
c906108c | 250 | sizeof inferior_fp_registers.fpu_fr); |
c5aa993b | 251 | memcpy (&inferior_fp_registers.Fpu_fsr, |
524d7c18 AC |
252 | &deprecated_registers[REGISTER_BYTE (FPS_REGNUM)], |
253 | sizeof (FPU_FSR_TYPE)); | |
c906108c | 254 | if (0 != |
39f77062 | 255 | ptrace (PTRACE_SETFPREGS, PIDGET (inferior_ptid), |
c5aa993b JM |
256 | (PTRACE_ARG3_TYPE) & inferior_fp_registers, 0)) |
257 | perror ("ptrace_setfpregs"); | |
c906108c SS |
258 | } |
259 | } | |
260 | ||
c67b4c45 KB |
261 | /* Provide registers to GDB from a core file. |
262 | ||
263 | CORE_REG_SECT points to an array of bytes, which are the contents | |
264 | of a `note' from a core file which BFD thinks might contain | |
265 | register contents. CORE_REG_SIZE is its size. | |
266 | ||
267 | WHICH says which register set corelow suspects this is: | |
268 | 0 --- the general-purpose register set | |
269 | 2 --- the floating-point register set | |
270 | ||
271 | IGNORE is unused. */ | |
c906108c SS |
272 | |
273 | static void | |
c67b4c45 KB |
274 | fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, |
275 | int which, CORE_ADDR ignore) | |
c906108c SS |
276 | { |
277 | ||
c5aa993b JM |
278 | if (which == 0) |
279 | { | |
c906108c | 280 | |
c5aa993b | 281 | /* Integer registers */ |
c906108c SS |
282 | |
283 | #define gregs ((struct regs *)core_reg_sect) | |
c5aa993b | 284 | /* G0 *always* holds 0. */ |
524d7c18 | 285 | *(int *) &deprecated_registers[REGISTER_BYTE (0)] = 0; |
c906108c | 286 | |
c5aa993b | 287 | /* The globals and output registers. */ |
524d7c18 | 288 | memcpy (&deprecated_registers[REGISTER_BYTE (G1_REGNUM)], &gregs->r_g1, |
c5aa993b | 289 | 15 * REGISTER_RAW_SIZE (G1_REGNUM)); |
524d7c18 AC |
290 | *(int *) &deprecated_registers[REGISTER_BYTE (PS_REGNUM)] = gregs->r_ps; |
291 | *(int *) &deprecated_registers[REGISTER_BYTE (PC_REGNUM)] = gregs->r_pc; | |
292 | *(int *) &deprecated_registers[REGISTER_BYTE (NPC_REGNUM)] = gregs->r_npc; | |
293 | *(int *) &deprecated_registers[REGISTER_BYTE (Y_REGNUM)] = gregs->r_y; | |
c5aa993b JM |
294 | |
295 | /* My best guess at where to get the locals and input | |
296 | registers is exactly where they usually are, right above | |
297 | the stack pointer. If the core dump was caused by a bus error | |
298 | from blowing away the stack pointer (as is possible) then this | |
299 | won't work, but it's worth the try. */ | |
300 | { | |
301 | int sp; | |
302 | ||
524d7c18 AC |
303 | sp = *(int *) &deprecated_registers[REGISTER_BYTE (SP_REGNUM)]; |
304 | if (0 != target_read_memory (sp, | |
305 | &deprecated_registers[REGISTER_BYTE (L0_REGNUM)], | |
c5aa993b JM |
306 | 16 * REGISTER_RAW_SIZE (L0_REGNUM))) |
307 | { | |
308 | /* fprintf_unfiltered so user can still use gdb */ | |
309 | fprintf_unfiltered (gdb_stderr, | |
310 | "Couldn't read input and local registers from core file\n"); | |
311 | } | |
312 | } | |
c906108c | 313 | } |
c5aa993b JM |
314 | else if (which == 2) |
315 | { | |
c906108c | 316 | |
c5aa993b | 317 | /* Floating point registers */ |
c906108c SS |
318 | |
319 | #define fpuregs ((struct fpu *) core_reg_sect) | |
c5aa993b JM |
320 | if (core_reg_size >= sizeof (struct fpu)) |
321 | { | |
524d7c18 AC |
322 | memcpy (&deprecated_registers[REGISTER_BYTE (FP0_REGNUM)], |
323 | fpuregs->fpu_regs, sizeof (fpuregs->fpu_regs)); | |
324 | memcpy (&deprecated_registers[REGISTER_BYTE (FPS_REGNUM)], | |
325 | &fpuregs->fpu_fsr, sizeof (FPU_FSR_TYPE)); | |
c5aa993b JM |
326 | } |
327 | else | |
328 | fprintf_unfiltered (gdb_stderr, "Couldn't read float regs from core file\n"); | |
329 | } | |
c906108c SS |
330 | } |
331 | ||
332 | int | |
fba45db2 | 333 | kernel_u_size (void) |
c906108c SS |
334 | { |
335 | return (sizeof (struct user)); | |
336 | } | |
c906108c | 337 | \f |
c5aa993b | 338 | |
c906108c SS |
339 | /* Register that we are able to handle sparc core file formats. |
340 | FIXME: is this really bfd_target_unknown_flavour? */ | |
341 | ||
342 | static struct core_fns sparc_core_fns = | |
343 | { | |
2acceee2 JM |
344 | bfd_target_unknown_flavour, /* core_flavour */ |
345 | default_check_format, /* check_format */ | |
346 | default_core_sniffer, /* core_sniffer */ | |
347 | fetch_core_registers, /* core_read_registers */ | |
348 | NULL /* next */ | |
c906108c SS |
349 | }; |
350 | ||
351 | void | |
fba45db2 | 352 | _initialize_core_sparc (void) |
c906108c SS |
353 | { |
354 | add_core_fns (&sparc_core_fns); | |
355 | } |