1 /* Functions specific to running gdb native on a SPARC running SunOS4.
2 Copyright 1989, 1992, 1993, 1994, 1996, 1997, 1998, 1999, 2000, 2001
3 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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. */
28 #ifdef HAVE_SYS_PARAM_H
29 #include <sys/param.h>
32 #include <sys/ptrace.h>
37 #include <machine/reg.h>
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. */
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. */
56 fetch_inferior_registers (int regno
)
58 struct regs inferior_registers
;
59 struct fp_status inferior_fp_registers
;
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. */
65 internal_error (__FILE__
, __LINE__
, "failed internal consistency check");
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. */
74 if (regno
< O7_REGNUM
/* including -1 */
76 || (!deprecated_register_valid
[SP_REGNUM
] && regno
< I7_REGNUM
))
78 if (0 != ptrace (PTRACE_GETREGS
, PIDGET (inferior_ptid
),
79 (PTRACE_ARG3_TYPE
) & inferior_registers
, 0))
80 perror ("ptrace_getregs");
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
;
91 *(int *) ®isters
[REGISTER_BYTE (Y_REGNUM
)] = inferior_registers
.r_y
;
93 for (i
= G0_REGNUM
; i
<= O7_REGNUM
; i
++)
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;
99 /* If we don't set these valid, read_register_bytes() rereads
100 all the regs every time it is called! FIXME. */
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 */
106 /* Floating point registers */
108 regno
== FPS_REGNUM
||
109 (regno
>= FP0_REGNUM
&& regno
<= FP0_REGNUM
+ 31))
111 if (0 != ptrace (PTRACE_GETFPREGS
, PIDGET (inferior_ptid
),
112 (PTRACE_ARG3_TYPE
) & inferior_fp_registers
,
114 perror ("ptrace_getfpregs");
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
));
119 for (i
= FP0_REGNUM
; i
<= FP0_REGNUM
+ 31; i
++)
120 deprecated_register_valid
[i
] = 1;
121 deprecated_register_valid
[FPS_REGNUM
] = 1;
124 /* These regs are saved on the stack by the kernel. Only read them
125 all (16 ptrace calls!) if we really need them. */
128 CORE_ADDR sp
= *(unsigned int *) & deprecated_registers
[REGISTER_BYTE (SP_REGNUM
)];
129 target_read_memory (sp
, &deprecated_registers
[REGISTER_BYTE (L0_REGNUM
)],
130 16 * REGISTER_RAW_SIZE (L0_REGNUM
));
131 for (i
= L0_REGNUM
; i
<= I7_REGNUM
; i
++)
132 deprecated_register_valid
[i
] = 1;
134 else if (regno
>= L0_REGNUM
&& regno
<= I7_REGNUM
)
136 CORE_ADDR sp
= *(unsigned int *) & deprecated_registers
[REGISTER_BYTE (SP_REGNUM
)];
137 i
= REGISTER_BYTE (regno
);
138 if (deprecated_register_valid
[regno
])
139 printf_unfiltered ("register %d valid and read\n", regno
);
140 target_read_memory (sp
+ i
- REGISTER_BYTE (L0_REGNUM
),
141 &deprecated_registers
[i
], REGISTER_RAW_SIZE (regno
));
142 deprecated_register_valid
[regno
] = 1;
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). */
151 store_inferior_registers (int regno
)
153 struct regs inferior_registers
;
154 struct fp_status inferior_fp_registers
;
155 int wanna_store
= INT_REGS
+ STACK_REGS
+ FP_REGS
;
157 /* First decide which pieces of machine-state we need to modify.
158 Default for regno == -1 case is all pieces. */
161 if (FP0_REGNUM
<= regno
&& regno
< FP0_REGNUM
+ 32)
163 wanna_store
= FP_REGS
;
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
;
174 wanna_store
= STACK_REGS
;
178 /* See if we're forcing the stores to happen now, or deferring. */
181 wanna_store
= deferred_stores
;
186 if (wanna_store
== STACK_REGS
)
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. */
193 deferred_stores
|= wanna_store
;
198 if (wanna_store
& STACK_REGS
)
200 CORE_ADDR sp
= *(unsigned int *) & deprecated_registers
[REGISTER_BYTE (SP_REGNUM
)];
202 if (regno
< 0 || regno
== SP_REGNUM
)
204 if (!deprecated_register_valid
[L0_REGNUM
+ 5])
205 internal_error (__FILE__
, __LINE__
, "failed internal consistency check");
206 target_write_memory (sp
,
207 &deprecated_registers
[REGISTER_BYTE (L0_REGNUM
)],
208 16 * REGISTER_RAW_SIZE (L0_REGNUM
));
212 if (!deprecated_register_valid
[regno
])
213 internal_error (__FILE__
, __LINE__
, "failed internal consistency check");
214 target_write_memory (sp
+ REGISTER_BYTE (regno
) - REGISTER_BYTE (L0_REGNUM
),
215 &deprecated_registers
[REGISTER_BYTE (regno
)],
216 REGISTER_RAW_SIZE (regno
));
221 if (wanna_store
& INT_REGS
)
223 if (!deprecated_register_valid
[G1_REGNUM
])
224 internal_error (__FILE__
, __LINE__
, "failed internal consistency check");
226 memcpy (&inferior_registers
.r_g1
,
227 &deprecated_registers
[REGISTER_BYTE (G1_REGNUM
)],
228 15 * REGISTER_RAW_SIZE (G1_REGNUM
));
230 inferior_registers
.r_ps
=
231 *(int *) &deprecated_registers
[REGISTER_BYTE (PS_REGNUM
)];
232 inferior_registers
.r_pc
=
233 *(int *) &deprecated_registers
[REGISTER_BYTE (PC_REGNUM
)];
234 inferior_registers
.r_npc
=
235 *(int *) &deprecated_registers
[REGISTER_BYTE (NPC_REGNUM
)];
236 inferior_registers
.r_y
=
237 *(int *) &deprecated_registers
[REGISTER_BYTE (Y_REGNUM
)];
239 if (0 != ptrace (PTRACE_SETREGS
, PIDGET (inferior_ptid
),
240 (PTRACE_ARG3_TYPE
) & inferior_registers
, 0))
241 perror ("ptrace_setregs");
244 if (wanna_store
& FP_REGS
)
246 if (!deprecated_register_valid
[FP0_REGNUM
+ 9])
247 internal_error (__FILE__
, __LINE__
, "failed internal consistency check");
248 memcpy (&inferior_fp_registers
,
249 &deprecated_registers
[REGISTER_BYTE (FP0_REGNUM
)],
250 sizeof inferior_fp_registers
.fpu_fr
);
251 memcpy (&inferior_fp_registers
.Fpu_fsr
,
252 &deprecated_registers
[REGISTER_BYTE (FPS_REGNUM
)],
253 sizeof (FPU_FSR_TYPE
));
255 ptrace (PTRACE_SETFPREGS
, PIDGET (inferior_ptid
),
256 (PTRACE_ARG3_TYPE
) & inferior_fp_registers
, 0))
257 perror ("ptrace_setfpregs");
261 /* Provide registers to GDB from a core file.
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.
267 WHICH says which register set corelow suspects this is:
268 0 --- the general-purpose register set
269 2 --- the floating-point register set
274 fetch_core_registers (char *core_reg_sect
, unsigned core_reg_size
,
275 int which
, CORE_ADDR ignore
)
281 /* Integer registers */
283 #define gregs ((struct regs *)core_reg_sect)
284 /* G0 *always* holds 0. */
285 *(int *) &deprecated_registers
[REGISTER_BYTE (0)] = 0;
287 /* The globals and output registers. */
288 memcpy (&deprecated_registers
[REGISTER_BYTE (G1_REGNUM
)], &gregs
->r_g1
,
289 15 * REGISTER_RAW_SIZE (G1_REGNUM
));
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
;
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. */
303 sp
= *(int *) &deprecated_registers
[REGISTER_BYTE (SP_REGNUM
)];
304 if (0 != target_read_memory (sp
,
305 &deprecated_registers
[REGISTER_BYTE (L0_REGNUM
)],
306 16 * REGISTER_RAW_SIZE (L0_REGNUM
)))
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");
317 /* Floating point registers */
319 #define fpuregs ((struct fpu *) core_reg_sect)
320 if (core_reg_size
>= sizeof (struct fpu
))
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
));
328 fprintf_unfiltered (gdb_stderr
, "Couldn't read float regs from core file\n");
335 return (sizeof (struct user
));
339 /* Register that we are able to handle sparc core file formats.
340 FIXME: is this really bfd_target_unknown_flavour? */
342 static struct core_fns sparc_core_fns
=
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 */
352 _initialize_core_sparc (void)
354 add_core_fns (&sparc_core_fns
);