Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Functions specific to running gdb native on an ns32k running NetBSD |
9f8e0089 MK |
2 | |
3 | Copyright 1989, 1992, 1993, 1994, 1996, 1998, 1999, 2000, 2001, | |
4 | 2004 Free Software Foundation, Inc. | |
c906108c | 5 | |
c5aa993b | 6 | This file is part of GDB. |
c906108c | 7 | |
c5aa993b JM |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
c906108c | 12 | |
c5aa993b JM |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
c906108c | 17 | |
c5aa993b JM |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
22 | |
23 | #include <sys/types.h> | |
24 | #include <sys/ptrace.h> | |
25 | #include <machine/reg.h> | |
26 | #include <machine/frame.h> | |
27 | #include <machine/pcb.h> | |
28 | ||
29 | #include "defs.h" | |
30 | #include "inferior.h" | |
31 | #include "target.h" | |
32 | #include "gdbcore.h" | |
4e052eda | 33 | #include "regcache.h" |
c906108c SS |
34 | |
35 | #define RF(dst, src) \ | |
62700349 | 36 | memcpy(&deprecated_registers[DEPRECATED_REGISTER_BYTE(dst)], &src, sizeof(src)) |
c906108c SS |
37 | |
38 | #define RS(src, dst) \ | |
62700349 | 39 | memcpy(&dst, &deprecated_registers[DEPRECATED_REGISTER_BYTE(src)], sizeof(dst)) |
c906108c SS |
40 | |
41 | void | |
fba45db2 | 42 | fetch_inferior_registers (int regno) |
c906108c SS |
43 | { |
44 | struct reg inferior_registers; | |
45 | struct fpreg inferior_fpregisters; | |
46 | ||
39f77062 | 47 | ptrace (PT_GETREGS, PIDGET (inferior_ptid), |
dfeafa2f | 48 | (PTRACE_TYPE_ARG3) & inferior_registers, 0); |
39f77062 | 49 | ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), |
dfeafa2f | 50 | (PTRACE_TYPE_ARG3) & inferior_fpregisters, 0); |
c5aa993b JM |
51 | |
52 | RF (R0_REGNUM + 0, inferior_registers.r_r0); | |
53 | RF (R0_REGNUM + 1, inferior_registers.r_r1); | |
54 | RF (R0_REGNUM + 2, inferior_registers.r_r2); | |
55 | RF (R0_REGNUM + 3, inferior_registers.r_r3); | |
56 | RF (R0_REGNUM + 4, inferior_registers.r_r4); | |
57 | RF (R0_REGNUM + 5, inferior_registers.r_r5); | |
58 | RF (R0_REGNUM + 6, inferior_registers.r_r6); | |
59 | RF (R0_REGNUM + 7, inferior_registers.r_r7); | |
60 | ||
61 | RF (SP_REGNUM, inferior_registers.r_sp); | |
0ba6dca9 | 62 | RF (DEPRECATED_FP_REGNUM, inferior_registers.r_fp); |
c5aa993b JM |
63 | RF (PC_REGNUM, inferior_registers.r_pc); |
64 | RF (PS_REGNUM, inferior_registers.r_psr); | |
65 | ||
66 | RF (FPS_REGNUM, inferior_fpregisters.r_fsr); | |
67 | RF (FP0_REGNUM + 0, inferior_fpregisters.r_freg[0]); | |
68 | RF (FP0_REGNUM + 2, inferior_fpregisters.r_freg[2]); | |
69 | RF (FP0_REGNUM + 4, inferior_fpregisters.r_freg[4]); | |
70 | RF (FP0_REGNUM + 6, inferior_fpregisters.r_freg[6]); | |
71 | RF (LP0_REGNUM + 1, inferior_fpregisters.r_freg[1]); | |
72 | RF (LP0_REGNUM + 3, inferior_fpregisters.r_freg[3]); | |
73 | RF (LP0_REGNUM + 5, inferior_fpregisters.r_freg[5]); | |
74 | RF (LP0_REGNUM + 7, inferior_fpregisters.r_freg[7]); | |
2b9e5f3f | 75 | deprecated_registers_fetched (); |
c906108c SS |
76 | } |
77 | ||
78 | void | |
fba45db2 | 79 | store_inferior_registers (int regno) |
c906108c SS |
80 | { |
81 | struct reg inferior_registers; | |
82 | struct fpreg inferior_fpregisters; | |
83 | ||
c5aa993b JM |
84 | RS (R0_REGNUM + 0, inferior_registers.r_r0); |
85 | RS (R0_REGNUM + 1, inferior_registers.r_r1); | |
86 | RS (R0_REGNUM + 2, inferior_registers.r_r2); | |
87 | RS (R0_REGNUM + 3, inferior_registers.r_r3); | |
88 | RS (R0_REGNUM + 4, inferior_registers.r_r4); | |
89 | RS (R0_REGNUM + 5, inferior_registers.r_r5); | |
90 | RS (R0_REGNUM + 6, inferior_registers.r_r6); | |
91 | RS (R0_REGNUM + 7, inferior_registers.r_r7); | |
92 | ||
93 | RS (SP_REGNUM, inferior_registers.r_sp); | |
0ba6dca9 | 94 | RS (DEPRECATED_FP_REGNUM, inferior_registers.r_fp); |
c5aa993b JM |
95 | RS (PC_REGNUM, inferior_registers.r_pc); |
96 | RS (PS_REGNUM, inferior_registers.r_psr); | |
97 | ||
98 | RS (FPS_REGNUM, inferior_fpregisters.r_fsr); | |
99 | RS (FP0_REGNUM + 0, inferior_fpregisters.r_freg[0]); | |
100 | RS (FP0_REGNUM + 2, inferior_fpregisters.r_freg[2]); | |
101 | RS (FP0_REGNUM + 4, inferior_fpregisters.r_freg[4]); | |
102 | RS (FP0_REGNUM + 6, inferior_fpregisters.r_freg[6]); | |
103 | RS (LP0_REGNUM + 1, inferior_fpregisters.r_freg[1]); | |
104 | RS (LP0_REGNUM + 3, inferior_fpregisters.r_freg[3]); | |
105 | RS (LP0_REGNUM + 5, inferior_fpregisters.r_freg[5]); | |
106 | RS (LP0_REGNUM + 7, inferior_fpregisters.r_freg[7]); | |
c906108c | 107 | |
39f77062 | 108 | ptrace (PT_SETREGS, PIDGET (inferior_ptid), |
dfeafa2f | 109 | (PTRACE_TYPE_ARG3) & inferior_registers, 0); |
39f77062 | 110 | ptrace (PT_SETFPREGS, PIDGET (inferior_ptid), |
dfeafa2f | 111 | (PTRACE_TYPE_ARG3) & inferior_fpregisters, 0); |
c906108c SS |
112 | } |
113 | \f | |
114 | ||
115 | /* XXX - Add this to machine/regs.h instead? */ | |
c5aa993b JM |
116 | struct coreregs |
117 | { | |
c906108c SS |
118 | struct reg intreg; |
119 | struct fpreg freg; | |
120 | }; | |
121 | ||
697ec6c4 | 122 | /* Get registers from a core file. REG_ADDR is unused. */ |
c906108c | 123 | static void |
697ec6c4 KB |
124 | fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which, |
125 | unsigned int reg_addr) | |
c906108c SS |
126 | { |
127 | struct coreregs *core_reg; | |
128 | ||
c5aa993b | 129 | core_reg = (struct coreregs *) core_reg_sect; |
c906108c SS |
130 | |
131 | /* | |
132 | * We have *all* registers | |
133 | * in the first core section. | |
134 | * Ignore which. | |
135 | */ | |
136 | ||
c5aa993b JM |
137 | if (core_reg_size < sizeof (*core_reg)) |
138 | { | |
139 | fprintf_unfiltered (gdb_stderr, "Couldn't read regs from core file\n"); | |
140 | return; | |
141 | } | |
c906108c SS |
142 | |
143 | /* Integer registers */ | |
c5aa993b JM |
144 | RF (R0_REGNUM + 0, core_reg->intreg.r_r0); |
145 | RF (R0_REGNUM + 1, core_reg->intreg.r_r1); | |
146 | RF (R0_REGNUM + 2, core_reg->intreg.r_r2); | |
147 | RF (R0_REGNUM + 3, core_reg->intreg.r_r3); | |
148 | RF (R0_REGNUM + 4, core_reg->intreg.r_r4); | |
149 | RF (R0_REGNUM + 5, core_reg->intreg.r_r5); | |
150 | RF (R0_REGNUM + 6, core_reg->intreg.r_r6); | |
151 | RF (R0_REGNUM + 7, core_reg->intreg.r_r7); | |
152 | ||
153 | RF (SP_REGNUM, core_reg->intreg.r_sp); | |
0ba6dca9 | 154 | RF (DEPRECATED_FP_REGNUM, core_reg->intreg.r_fp); |
c5aa993b JM |
155 | RF (PC_REGNUM, core_reg->intreg.r_pc); |
156 | RF (PS_REGNUM, core_reg->intreg.r_psr); | |
c906108c SS |
157 | |
158 | /* Floating point registers */ | |
c5aa993b JM |
159 | RF (FPS_REGNUM, core_reg->freg.r_fsr); |
160 | RF (FP0_REGNUM + 0, core_reg->freg.r_freg[0]); | |
161 | RF (FP0_REGNUM + 2, core_reg->freg.r_freg[2]); | |
162 | RF (FP0_REGNUM + 4, core_reg->freg.r_freg[4]); | |
163 | RF (FP0_REGNUM + 6, core_reg->freg.r_freg[6]); | |
164 | RF (LP0_REGNUM + 1, core_reg->freg.r_freg[1]); | |
165 | RF (LP0_REGNUM + 3, core_reg->freg.r_freg[3]); | |
166 | RF (LP0_REGNUM + 5, core_reg->freg.r_freg[5]); | |
167 | RF (LP0_REGNUM + 7, core_reg->freg.r_freg[7]); | |
2b9e5f3f | 168 | deprecated_registers_fetched (); |
c906108c SS |
169 | } |
170 | ||
171 | /* Register that we are able to handle ns32knbsd core file formats. | |
172 | FIXME: is this really bfd_target_unknown_flavour? */ | |
173 | ||
174 | static struct core_fns nat_core_fns = | |
175 | { | |
2acceee2 JM |
176 | bfd_target_unknown_flavour, /* core_flavour */ |
177 | default_check_format, /* check_format */ | |
178 | default_core_sniffer, /* core_sniffer */ | |
179 | fetch_core_registers, /* core_read_registers */ | |
180 | NULL /* next */ | |
c906108c SS |
181 | }; |
182 | ||
183 | void | |
fba45db2 | 184 | _initialize_ns32knbsd_nat (void) |
c906108c | 185 | { |
00e32a35 | 186 | deprecated_add_core_fns (&nat_core_fns); |
c906108c SS |
187 | } |
188 | \f | |
189 | ||
190 | /* | |
191 | * kernel_u_size() is not helpful on NetBSD because | |
192 | * the "u" struct is NOT in the core dump file. | |
193 | */ | |
194 | ||
195 | #ifdef FETCH_KCORE_REGISTERS | |
196 | /* | |
197 | * Get registers from a kernel crash dump or live kernel. | |
198 | * Called by kcore-nbsd.c:get_kcore_registers(). | |
199 | */ | |
200 | void | |
fba45db2 | 201 | fetch_kcore_registers (struct pcb *pcb) |
c906108c SS |
202 | { |
203 | struct switchframe sf; | |
204 | struct reg intreg; | |
205 | int dummy; | |
206 | ||
207 | /* Integer registers */ | |
c5aa993b JM |
208 | if (target_read_memory ((CORE_ADDR) pcb->pcb_ksp, (char *) &sf, sizeof sf)) |
209 | error ("Cannot read integer registers."); | |
c906108c SS |
210 | |
211 | /* We use the psr at kernel entry */ | |
c5aa993b JM |
212 | if (target_read_memory ((CORE_ADDR) pcb->pcb_onstack, (char *) &intreg, sizeof intreg)) |
213 | error ("Cannot read processor status register."); | |
c906108c SS |
214 | |
215 | dummy = 0; | |
c5aa993b JM |
216 | RF (R0_REGNUM + 0, dummy); |
217 | RF (R0_REGNUM + 1, dummy); | |
218 | RF (R0_REGNUM + 2, dummy); | |
219 | RF (R0_REGNUM + 3, sf.sf_r3); | |
220 | RF (R0_REGNUM + 4, sf.sf_r4); | |
221 | RF (R0_REGNUM + 5, sf.sf_r5); | |
222 | RF (R0_REGNUM + 6, sf.sf_r6); | |
223 | RF (R0_REGNUM + 7, sf.sf_r7); | |
c906108c SS |
224 | |
225 | dummy = pcb->pcb_kfp + 8; | |
c5aa993b | 226 | RF (SP_REGNUM, dummy); |
0ba6dca9 | 227 | RF (DEPRECATED_FP_REGNUM, sf.sf_fp); |
c5aa993b JM |
228 | RF (PC_REGNUM, sf.sf_pc); |
229 | RF (PS_REGNUM, intreg.r_psr); | |
c906108c SS |
230 | |
231 | /* Floating point registers */ | |
c5aa993b JM |
232 | RF (FPS_REGNUM, pcb->pcb_fsr); |
233 | RF (FP0_REGNUM + 0, pcb->pcb_freg[0]); | |
234 | RF (FP0_REGNUM + 2, pcb->pcb_freg[2]); | |
235 | RF (FP0_REGNUM + 4, pcb->pcb_freg[4]); | |
236 | RF (FP0_REGNUM + 6, pcb->pcb_freg[6]); | |
237 | RF (LP0_REGNUM + 1, pcb->pcb_freg[1]); | |
238 | RF (LP0_REGNUM + 3, pcb->pcb_freg[3]); | |
239 | RF (LP0_REGNUM + 5, pcb->pcb_freg[5]); | |
240 | RF (LP0_REGNUM + 7, pcb->pcb_freg[7]); | |
2b9e5f3f | 241 | deprecated_registers_fetched (); |
c906108c | 242 | } |
c5aa993b | 243 | #endif /* FETCH_KCORE_REGISTERS */ |
c906108c SS |
244 | |
245 | void | |
fba45db2 | 246 | clear_regs (void) |
c906108c SS |
247 | { |
248 | double zero = 0.0; | |
249 | int null = 0; | |
c5aa993b | 250 | |
c906108c | 251 | /* Integer registers */ |
c5aa993b JM |
252 | RF (R0_REGNUM + 0, null); |
253 | RF (R0_REGNUM + 1, null); | |
254 | RF (R0_REGNUM + 2, null); | |
255 | RF (R0_REGNUM + 3, null); | |
256 | RF (R0_REGNUM + 4, null); | |
257 | RF (R0_REGNUM + 5, null); | |
258 | RF (R0_REGNUM + 6, null); | |
259 | RF (R0_REGNUM + 7, null); | |
260 | ||
261 | RF (SP_REGNUM, null); | |
0ba6dca9 | 262 | RF (DEPRECATED_FP_REGNUM, null); |
c5aa993b JM |
263 | RF (PC_REGNUM, null); |
264 | RF (PS_REGNUM, null); | |
c906108c SS |
265 | |
266 | /* Floating point registers */ | |
c5aa993b JM |
267 | RF (FPS_REGNUM, zero); |
268 | RF (FP0_REGNUM + 0, zero); | |
269 | RF (FP0_REGNUM + 2, zero); | |
270 | RF (FP0_REGNUM + 4, zero); | |
271 | RF (FP0_REGNUM + 6, zero); | |
272 | RF (LP0_REGNUM + 0, zero); | |
273 | RF (LP0_REGNUM + 1, zero); | |
274 | RF (LP0_REGNUM + 2, zero); | |
275 | RF (LP0_REGNUM + 3, zero); | |
c906108c SS |
276 | return; |
277 | } | |
278 | ||
279 | /* Return number of args passed to a frame. | |
280 | Can return -1, meaning no way to tell. */ | |
281 | ||
282 | int | |
fba45db2 | 283 | frame_num_args (struct frame_info *fi) |
c906108c | 284 | { |
c5aa993b JM |
285 | CORE_ADDR enter_addr; |
286 | CORE_ADDR argp; | |
287 | int inst; | |
288 | int args; | |
289 | int i; | |
290 | ||
291 | if (read_memory_integer (fi->frame, 4) == 0 && fi->pc < 0x10000) | |
292 | { | |
293 | /* main is always called with three args */ | |
294 | return (3); | |
295 | } | |
296 | enter_addr = ns32k_get_enter_addr (fi->pc); | |
297 | if (enter_addr = 0) | |
298 | return (-1); | |
6913c89a AC |
299 | argp = (enter_addr == 1 |
300 | ? DEPRECATED_SAVED_PC_AFTER_CALL (fi) | |
301 | : DEPRECATED_FRAME_SAVED_PC (fi)); | |
c5aa993b JM |
302 | for (i = 0; i < 16; i++) |
303 | { | |
304 | /* | |
305 | * After a bsr gcc may emit the following instructions | |
306 | * to remove the arguments from the stack: | |
307 | * cmpqd 0,tos - to remove 4 bytes from the stack | |
308 | * cmpd tos,tos - to remove 8 bytes from the stack | |
309 | * adjsp[bwd] -n - to remove n bytes from the stack | |
310 | * Gcc sometimes delays emitting these instructions and | |
311 | * may even throw a branch between our feet. | |
312 | */ | |
313 | inst = read_memory_integer (argp, 4); | |
314 | args = read_memory_integer (argp + 2, 4); | |
315 | if ((inst & 0xff) == 0xea) | |
316 | { /* br */ | |
317 | args = ((inst >> 8) & 0xffffff) | (args << 24); | |
318 | if (args & 0x80) | |
319 | { | |
320 | if (args & 0x40) | |
321 | { | |
322 | args = ntohl (args); | |
c906108c | 323 | } |
c5aa993b JM |
324 | else |
325 | { | |
326 | args = ntohs (args & 0xffff); | |
327 | if (args & 0x2000) | |
328 | args |= 0xc000; | |
c906108c | 329 | } |
c5aa993b JM |
330 | } |
331 | else | |
332 | { | |
333 | args = args & 0xff; | |
334 | if (args & 0x40) | |
335 | args |= 0x80; | |
336 | } | |
337 | argp += args; | |
338 | continue; | |
339 | } | |
340 | if ((inst & 0xffff) == 0xb81f) /* cmpqd 0,tos */ | |
341 | return (1); | |
342 | else if ((inst & 0xffff) == 0xbdc7) /* cmpd tos,tos */ | |
343 | return (2); | |
344 | else if ((inst & 0xfffc) == 0xa57c) | |
345 | { /* adjsp[bwd] */ | |
346 | switch (inst & 3) | |
347 | { | |
348 | case 0: | |
349 | args = ((args & 0xff) + 0x80); | |
350 | break; | |
351 | case 1: | |
352 | args = ((ntohs (args) & 0xffff) + 0x8000); | |
353 | break; | |
354 | case 3: | |
355 | args = -ntohl (args); | |
356 | break; | |
357 | default: | |
358 | return (-1); | |
359 | } | |
360 | if (args / 4 > 10 || (args & 3) != 0) | |
361 | continue; | |
362 | return (args / 4); | |
c906108c | 363 | } |
c5aa993b JM |
364 | argp += 1; |
365 | } | |
366 | return (-1); | |
c906108c | 367 | } |