1 /* Functions specific to running gdb native on a Sun 4 running sunos4.
2 Copyright (C) 1989, 1992, Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
25 #include <sys/ptrace.h>
27 #include <machine/reg.h>
29 /* We don't store all registers immediately when requested, since they
30 get sent over in large chunks anyway. Instead, we accumulate most
31 of the changes and send them over once. "deferred_stores" keeps
32 track of which sets of registers we have locally-changed copies of,
33 so we only need send the groups that have changed. */
39 /* Fetch one or more registers from the inferior. REGNO == -1 to get
40 them all. We actually fetch more than requested, when convenient,
41 marking them as valid so we won't fetch them again. */
44 fetch_inferior_registers (regno
)
47 struct regs inferior_registers
;
48 struct fp_status inferior_fp_registers
;
51 /* We should never be called with deferred stores, because a prerequisite
52 for writing regs is to have fetched them all (PREPARE_TO_STORE), sigh. */
53 if (deferred_stores
) abort();
57 /* Global and Out regs are fetched directly, as well as the control
58 registers. If we're getting one of the in or local regs,
59 and the stack pointer has not yet been fetched,
60 we have to do that first, since they're found in memory relative
61 to the stack pointer. */
62 if (regno
< O7_REGNUM
/* including -1 */
64 || (!register_valid
[SP_REGNUM
] && regno
< I7_REGNUM
))
66 if (0 != ptrace (PTRACE_GETREGS
, inferior_pid
,
67 (PTRACE_ARG3_TYPE
) &inferior_registers
, 0))
68 perror("ptrace_getregs");
70 registers
[REGISTER_BYTE (0)] = 0;
71 memcpy (®isters
[REGISTER_BYTE (1)], &inferior_registers
.r_g1
,
72 15 * REGISTER_RAW_SIZE (G0_REGNUM
));
73 *(int *)®isters
[REGISTER_BYTE (PS_REGNUM
)] = inferior_registers
.r_ps
;
74 *(int *)®isters
[REGISTER_BYTE (PC_REGNUM
)] = inferior_registers
.r_pc
;
75 *(int *)®isters
[REGISTER_BYTE (NPC_REGNUM
)] = inferior_registers
.r_npc
;
76 *(int *)®isters
[REGISTER_BYTE (Y_REGNUM
)] = inferior_registers
.r_y
;
78 for (i
= G0_REGNUM
; i
<= O7_REGNUM
; i
++)
79 register_valid
[i
] = 1;
80 register_valid
[Y_REGNUM
] = 1;
81 register_valid
[PS_REGNUM
] = 1;
82 register_valid
[PC_REGNUM
] = 1;
83 register_valid
[NPC_REGNUM
] = 1;
84 /* If we don't set these valid, read_register_bytes() rereads
85 all the regs every time it is called! FIXME. */
86 register_valid
[WIM_REGNUM
] = 1; /* Not true yet, FIXME */
87 register_valid
[TBR_REGNUM
] = 1; /* Not true yet, FIXME */
88 register_valid
[FPS_REGNUM
] = 1; /* Not true yet, FIXME */
89 register_valid
[CPS_REGNUM
] = 1; /* Not true yet, FIXME */
92 /* Floating point registers */
93 if (regno
== -1 || (regno
>= FP0_REGNUM
&& regno
<= FP0_REGNUM
+ 31))
95 if (0 != ptrace (PTRACE_GETFPREGS
, inferior_pid
,
96 (PTRACE_ARG3_TYPE
) &inferior_fp_registers
,
98 perror("ptrace_getfpregs");
99 memcpy (®isters
[REGISTER_BYTE (FP0_REGNUM
)], &inferior_fp_registers
,
100 sizeof inferior_fp_registers
.fpu_fr
);
101 memcpy (®isters
[REGISTER_BYTE (FPS_REGNUM
)],
102 &inferior_fp_registers
.Fpu_fsr
,
103 sizeof (FPU_FSR_TYPE
));
104 for (i
= FP0_REGNUM
; i
<= FP0_REGNUM
+31; i
++)
105 register_valid
[i
] = 1;
106 register_valid
[FPS_REGNUM
] = 1;
109 /* These regs are saved on the stack by the kernel. Only read them
110 all (16 ptrace calls!) if we really need them. */
113 target_xfer_memory (*(CORE_ADDR
*)®isters
[REGISTER_BYTE (SP_REGNUM
)],
114 ®isters
[REGISTER_BYTE (L0_REGNUM
)],
115 16*REGISTER_RAW_SIZE (L0_REGNUM
), 0);
116 for (i
= L0_REGNUM
; i
<= I7_REGNUM
; i
++)
117 register_valid
[i
] = 1;
119 else if (regno
>= L0_REGNUM
&& regno
<= I7_REGNUM
)
121 CORE_ADDR sp
= *(CORE_ADDR
*)®isters
[REGISTER_BYTE (SP_REGNUM
)];
122 i
= REGISTER_BYTE (regno
);
123 if (register_valid
[regno
])
124 printf_unfiltered("register %d valid and read\n", regno
);
125 target_xfer_memory (sp
+ i
- REGISTER_BYTE (L0_REGNUM
),
126 ®isters
[i
], REGISTER_RAW_SIZE (regno
), 0);
127 register_valid
[regno
] = 1;
131 /* Store our register values back into the inferior.
132 If REGNO is -1, do this for all registers.
133 Otherwise, REGNO specifies which register (so we can save time). */
136 store_inferior_registers (regno
)
139 struct regs inferior_registers
;
140 struct fp_status inferior_fp_registers
;
141 int wanna_store
= INT_REGS
+ STACK_REGS
+ FP_REGS
;
143 /* First decide which pieces of machine-state we need to modify.
144 Default for regno == -1 case is all pieces. */
146 if (FP0_REGNUM
<= regno
&& regno
< FP0_REGNUM
+ 32)
148 wanna_store
= FP_REGS
;
152 if (regno
== SP_REGNUM
)
153 wanna_store
= INT_REGS
+ STACK_REGS
;
154 else if (regno
< L0_REGNUM
|| regno
> I7_REGNUM
)
155 wanna_store
= INT_REGS
;
157 wanna_store
= STACK_REGS
;
160 /* See if we're forcing the stores to happen now, or deferring. */
163 wanna_store
= deferred_stores
;
168 if (wanna_store
== STACK_REGS
)
170 /* Fall through and just store one stack reg. If we deferred
171 it, we'd have to store them all, or remember more info. */
175 deferred_stores
|= wanna_store
;
180 if (wanna_store
& STACK_REGS
)
182 CORE_ADDR sp
= *(CORE_ADDR
*)®isters
[REGISTER_BYTE (SP_REGNUM
)];
184 if (regno
< 0 || regno
== SP_REGNUM
)
186 if (!register_valid
[L0_REGNUM
+5]) abort();
187 target_xfer_memory (sp
,
188 ®isters
[REGISTER_BYTE (L0_REGNUM
)],
189 16*REGISTER_RAW_SIZE (L0_REGNUM
), 1);
193 if (!register_valid
[regno
]) abort();
194 target_xfer_memory (sp
+ REGISTER_BYTE (regno
) - REGISTER_BYTE (L0_REGNUM
),
195 ®isters
[REGISTER_BYTE (regno
)],
196 REGISTER_RAW_SIZE (regno
), 1);
201 if (wanna_store
& INT_REGS
)
203 if (!register_valid
[G1_REGNUM
]) abort();
205 memcpy (&inferior_registers
.r_g1
, ®isters
[REGISTER_BYTE (G1_REGNUM
)],
206 15 * REGISTER_RAW_SIZE (G1_REGNUM
));
208 inferior_registers
.r_ps
=
209 *(int *)®isters
[REGISTER_BYTE (PS_REGNUM
)];
210 inferior_registers
.r_pc
=
211 *(int *)®isters
[REGISTER_BYTE (PC_REGNUM
)];
212 inferior_registers
.r_npc
=
213 *(int *)®isters
[REGISTER_BYTE (NPC_REGNUM
)];
214 inferior_registers
.r_y
=
215 *(int *)®isters
[REGISTER_BYTE (Y_REGNUM
)];
217 if (0 != ptrace (PTRACE_SETREGS
, inferior_pid
,
218 (PTRACE_ARG3_TYPE
) &inferior_registers
, 0))
219 perror("ptrace_setregs");
222 if (wanna_store
& FP_REGS
)
224 if (!register_valid
[FP0_REGNUM
+9]) abort();
225 memcpy (&inferior_fp_registers
, ®isters
[REGISTER_BYTE (FP0_REGNUM
)],
226 sizeof inferior_fp_registers
.fpu_fr
);
227 memcpy (&inferior_fp_registers
.Fpu_fsr
,
228 ®isters
[REGISTER_BYTE (FPS_REGNUM
)], sizeof (FPU_FSR_TYPE
));
230 ptrace (PTRACE_SETFPREGS
, inferior_pid
,
231 (PTRACE_ARG3_TYPE
) &inferior_fp_registers
, 0))
232 perror("ptrace_setfpregs");
238 fetch_core_registers (core_reg_sect
, core_reg_size
, which
, ignore
)
240 unsigned core_reg_size
;
242 unsigned int ignore
; /* reg addr, unused in this version */
247 /* Integer registers */
249 #define gregs ((struct regs *)core_reg_sect)
250 /* G0 *always* holds 0. */
251 *(int *)®isters
[REGISTER_BYTE (0)] = 0;
253 /* The globals and output registers. */
254 memcpy (®isters
[REGISTER_BYTE (G1_REGNUM
)], &gregs
->r_g1
,
255 15 * REGISTER_RAW_SIZE (G1_REGNUM
));
256 *(int *)®isters
[REGISTER_BYTE (PS_REGNUM
)] = gregs
->r_ps
;
257 *(int *)®isters
[REGISTER_BYTE (PC_REGNUM
)] = gregs
->r_pc
;
258 *(int *)®isters
[REGISTER_BYTE (NPC_REGNUM
)] = gregs
->r_npc
;
259 *(int *)®isters
[REGISTER_BYTE (Y_REGNUM
)] = gregs
->r_y
;
261 /* My best guess at where to get the locals and input
262 registers is exactly where they usually are, right above
263 the stack pointer. If the core dump was caused by a bus error
264 from blowing away the stack pointer (as is possible) then this
265 won't work, but it's worth the try. */
269 sp
= *(int *)®isters
[REGISTER_BYTE (SP_REGNUM
)];
270 if (0 != target_read_memory (sp
, ®isters
[REGISTER_BYTE (L0_REGNUM
)],
271 16 * REGISTER_RAW_SIZE (L0_REGNUM
)))
273 /* fprintf_unfiltered so user can still use gdb */
274 fprintf_unfiltered (gdb_stderr
,
275 "Couldn't read input and local registers from core file\n");
278 } else if (which
== 2) {
280 /* Floating point registers */
282 #define fpuregs ((struct fpu *) core_reg_sect)
283 if (core_reg_size
>= sizeof (struct fpu
))
285 memcpy (®isters
[REGISTER_BYTE (FP0_REGNUM
)], fpuregs
->fpu_regs
,
286 sizeof (fpuregs
->fpu_regs
));
287 memcpy (®isters
[REGISTER_BYTE (FPS_REGNUM
)], &fpuregs
->fpu_fsr
,
288 sizeof (FPU_FSR_TYPE
));
291 fprintf_unfiltered (gdb_stderr
, "Couldn't read float regs from core file\n");