1 /* Functions specific to running gdb native on a SPARC running SunOS4.
2 Copyright 1989, 1992, 1993, 1994, 1996 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 #include <sys/ptrace.h>
27 #include <machine/reg.h>
30 /* We don't store all registers immediately when requested, since they
31 get sent over in large chunks anyway. Instead, we accumulate most
32 of the changes and send them over once. "deferred_stores" keeps
33 track of which sets of registers we have locally-changed copies of,
34 so we only need send the groups that have changed. */
40 /* Fetch one or more registers from the inferior. REGNO == -1 to get
41 them all. We actually fetch more than requested, when convenient,
42 marking them as valid so we won't fetch them again. */
45 fetch_inferior_registers (regno)
48 struct regs inferior_registers;
49 struct fp_status inferior_fp_registers;
52 /* We should never be called with deferred stores, because a prerequisite
53 for writing regs is to have fetched them all (PREPARE_TO_STORE), sigh. */
54 if (deferred_stores) abort();
58 /* Global and Out regs are fetched directly, as well as the control
59 registers. If we're getting one of the in or local regs,
60 and the stack pointer has not yet been fetched,
61 we have to do that first, since they're found in memory relative
62 to the stack pointer. */
63 if (regno < O7_REGNUM /* including -1 */
65 || (!register_valid[SP_REGNUM] && regno < I7_REGNUM))
67 if (0 != ptrace (PTRACE_GETREGS, inferior_pid,
68 (PTRACE_ARG3_TYPE) &inferior_registers, 0))
69 perror("ptrace_getregs");
71 registers[REGISTER_BYTE (0)] = 0;
72 memcpy (®isters[REGISTER_BYTE (1)], &inferior_registers.r_g1,
73 15 * REGISTER_RAW_SIZE (G0_REGNUM));
74 *(int *)®isters[REGISTER_BYTE (PS_REGNUM)] = inferior_registers.r_ps;
75 *(int *)®isters[REGISTER_BYTE (PC_REGNUM)] = inferior_registers.r_pc;
76 *(int *)®isters[REGISTER_BYTE (NPC_REGNUM)] = inferior_registers.r_npc;
77 *(int *)®isters[REGISTER_BYTE (Y_REGNUM)] = inferior_registers.r_y;
79 for (i = G0_REGNUM; i <= O7_REGNUM; i++)
80 register_valid[i] = 1;
81 register_valid[Y_REGNUM] = 1;
82 register_valid[PS_REGNUM] = 1;
83 register_valid[PC_REGNUM] = 1;
84 register_valid[NPC_REGNUM] = 1;
85 /* If we don't set these valid, read_register_bytes() rereads
86 all the regs every time it is called! FIXME. */
87 register_valid[WIM_REGNUM] = 1; /* Not true yet, FIXME */
88 register_valid[TBR_REGNUM] = 1; /* Not true yet, FIXME */
89 register_valid[CPS_REGNUM] = 1; /* Not true yet, FIXME */
92 /* Floating point registers */
94 regno == FPS_REGNUM ||
95 (regno >= FP0_REGNUM && regno <= FP0_REGNUM + 31))
97 if (0 != ptrace (PTRACE_GETFPREGS, inferior_pid,
98 (PTRACE_ARG3_TYPE) &inferior_fp_registers,
100 perror("ptrace_getfpregs");
101 memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)], &inferior_fp_registers,
102 sizeof inferior_fp_registers.fpu_fr);
103 memcpy (®isters[REGISTER_BYTE (FPS_REGNUM)],
104 &inferior_fp_registers.Fpu_fsr,
105 sizeof (FPU_FSR_TYPE));
106 for (i = FP0_REGNUM; i <= FP0_REGNUM+31; i++)
107 register_valid[i] = 1;
108 register_valid[FPS_REGNUM] = 1;
111 /* These regs are saved on the stack by the kernel. Only read them
112 all (16 ptrace calls!) if we really need them. */
115 target_xfer_memory (*(CORE_ADDR*)®isters[REGISTER_BYTE (SP_REGNUM)],
116 ®isters[REGISTER_BYTE (L0_REGNUM)],
117 16*REGISTER_RAW_SIZE (L0_REGNUM), 0);
118 for (i = L0_REGNUM; i <= I7_REGNUM; i++)
119 register_valid[i] = 1;
121 else if (regno >= L0_REGNUM && regno <= I7_REGNUM)
123 CORE_ADDR sp = *(CORE_ADDR*)®isters[REGISTER_BYTE (SP_REGNUM)];
124 i = REGISTER_BYTE (regno);
125 if (register_valid[regno])
126 printf_unfiltered("register %d valid and read\n", regno);
127 target_xfer_memory (sp + i - REGISTER_BYTE (L0_REGNUM),
128 ®isters[i], REGISTER_RAW_SIZE (regno), 0);
129 register_valid[regno] = 1;
133 /* Store our register values back into the inferior.
134 If REGNO is -1, do this for all registers.
135 Otherwise, REGNO specifies which register (so we can save time). */
138 store_inferior_registers (regno)
141 struct regs inferior_registers;
142 struct fp_status inferior_fp_registers;
143 int wanna_store = INT_REGS + STACK_REGS + FP_REGS;
145 /* First decide which pieces of machine-state we need to modify.
146 Default for regno == -1 case is all pieces. */
148 if (FP0_REGNUM <= regno && regno < FP0_REGNUM + 32)
150 wanna_store = FP_REGS;
154 if (regno == SP_REGNUM)
155 wanna_store = INT_REGS + STACK_REGS;
156 else if (regno < L0_REGNUM || regno > I7_REGNUM)
157 wanna_store = INT_REGS;
158 else if (regno == FPS_REGNUM)
159 wanna_store = FP_REGS;
161 wanna_store = STACK_REGS;
164 /* See if we're forcing the stores to happen now, or deferring. */
167 wanna_store = deferred_stores;
172 if (wanna_store == STACK_REGS)
174 /* Fall through and just store one stack reg. If we deferred
175 it, we'd have to store them all, or remember more info. */
179 deferred_stores |= wanna_store;
184 if (wanna_store & STACK_REGS)
186 CORE_ADDR sp = *(CORE_ADDR *)®isters[REGISTER_BYTE (SP_REGNUM)];
188 if (regno < 0 || regno == SP_REGNUM)
190 if (!register_valid[L0_REGNUM+5]) abort();
191 target_xfer_memory (sp,
192 ®isters[REGISTER_BYTE (L0_REGNUM)],
193 16*REGISTER_RAW_SIZE (L0_REGNUM), 1);
197 if (!register_valid[regno]) abort();
198 target_xfer_memory (sp + REGISTER_BYTE (regno) - REGISTER_BYTE (L0_REGNUM),
199 ®isters[REGISTER_BYTE (regno)],
200 REGISTER_RAW_SIZE (regno), 1);
205 if (wanna_store & INT_REGS)
207 if (!register_valid[G1_REGNUM]) abort();
209 memcpy (&inferior_registers.r_g1, ®isters[REGISTER_BYTE (G1_REGNUM)],
210 15 * REGISTER_RAW_SIZE (G1_REGNUM));
212 inferior_registers.r_ps =
213 *(int *)®isters[REGISTER_BYTE (PS_REGNUM)];
214 inferior_registers.r_pc =
215 *(int *)®isters[REGISTER_BYTE (PC_REGNUM)];
216 inferior_registers.r_npc =
217 *(int *)®isters[REGISTER_BYTE (NPC_REGNUM)];
218 inferior_registers.r_y =
219 *(int *)®isters[REGISTER_BYTE (Y_REGNUM)];
221 if (0 != ptrace (PTRACE_SETREGS, inferior_pid,
222 (PTRACE_ARG3_TYPE) &inferior_registers, 0))
223 perror("ptrace_setregs");
226 if (wanna_store & FP_REGS)
228 if (!register_valid[FP0_REGNUM+9]) abort();
229 memcpy (&inferior_fp_registers, ®isters[REGISTER_BYTE (FP0_REGNUM)],
230 sizeof inferior_fp_registers.fpu_fr);
231 memcpy (&inferior_fp_registers.Fpu_fsr,
232 ®isters[REGISTER_BYTE (FPS_REGNUM)], sizeof (FPU_FSR_TYPE));
234 ptrace (PTRACE_SETFPREGS, inferior_pid,
235 (PTRACE_ARG3_TYPE) &inferior_fp_registers, 0))
236 perror("ptrace_setfpregs");
242 fetch_core_registers (core_reg_sect, core_reg_size, which, ignore)
244 unsigned core_reg_size;
246 unsigned int ignore; /* reg addr, unused in this version */
251 /* Integer registers */
253 #define gregs ((struct regs *)core_reg_sect)
254 /* G0 *always* holds 0. */
255 *(int *)®isters[REGISTER_BYTE (0)] = 0;
257 /* The globals and output registers. */
258 memcpy (®isters[REGISTER_BYTE (G1_REGNUM)], &gregs->r_g1,
259 15 * REGISTER_RAW_SIZE (G1_REGNUM));
260 *(int *)®isters[REGISTER_BYTE (PS_REGNUM)] = gregs->r_ps;
261 *(int *)®isters[REGISTER_BYTE (PC_REGNUM)] = gregs->r_pc;
262 *(int *)®isters[REGISTER_BYTE (NPC_REGNUM)] = gregs->r_npc;
263 *(int *)®isters[REGISTER_BYTE (Y_REGNUM)] = gregs->r_y;
265 /* My best guess at where to get the locals and input
266 registers is exactly where they usually are, right above
267 the stack pointer. If the core dump was caused by a bus error
268 from blowing away the stack pointer (as is possible) then this
269 won't work, but it's worth the try. */
273 sp = *(int *)®isters[REGISTER_BYTE (SP_REGNUM)];
274 if (0 != target_read_memory (sp, ®isters[REGISTER_BYTE (L0_REGNUM)],
275 16 * REGISTER_RAW_SIZE (L0_REGNUM)))
277 /* fprintf_unfiltered so user can still use gdb */
278 fprintf_unfiltered (gdb_stderr,
279 "Couldn't read input and local registers from core file\n");
282 } else if (which == 2) {
284 /* Floating point registers */
286 #define fpuregs ((struct fpu *) core_reg_sect)
287 if (core_reg_size >= sizeof (struct fpu))
289 memcpy (®isters[REGISTER_BYTE (FP0_REGNUM)], fpuregs->fpu_regs,
290 sizeof (fpuregs->fpu_regs));
291 memcpy (®isters[REGISTER_BYTE (FPS_REGNUM)], &fpuregs->fpu_fsr,
292 sizeof (FPU_FSR_TYPE));
295 fprintf_unfiltered (gdb_stderr, "Couldn't read float regs from core file\n");
302 return (sizeof (struct user));