Commit | Line | Data |
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c906108c SS |
1 | /* Intel 386 native support. |
2 | Copyright (C) 1988, 1989, 1991, 1992 Free Software Foundation, Inc. | |
3 | ||
c5aa993b | 4 | This file is part of GDB. |
c906108c | 5 | |
c5aa993b JM |
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. | |
c906108c | 10 | |
c5aa993b JM |
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. | |
c906108c | 15 | |
c5aa993b JM |
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, | |
19 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
20 | |
21 | #include "defs.h" | |
22 | #include "frame.h" | |
23 | #include "inferior.h" | |
24 | #include "language.h" | |
25 | #include "gdbcore.h" | |
26 | ||
27 | #ifdef USG | |
28 | #include <sys/types.h> | |
29 | #endif | |
30 | ||
31 | #include <sys/param.h> | |
32 | #include <sys/dir.h> | |
33 | #include <signal.h> | |
34 | #include <sys/user.h> | |
35 | #include <sys/ioctl.h> | |
36 | #include <fcntl.h> | |
37 | ||
38 | #include <sys/file.h> | |
39 | #include "gdb_stat.h" | |
40 | ||
41 | #include <stddef.h> | |
42 | #include <sys/ptrace.h> | |
43 | ||
44 | /* Does AIX define this in <errno.h>? */ | |
45 | extern int errno; | |
46 | ||
47 | #ifdef HAVE_SYS_REG_H | |
48 | #include <sys/reg.h> | |
49 | #endif | |
50 | ||
51 | #include "floatformat.h" | |
52 | ||
53 | #include "target.h" | |
54 | ||
a14ed312 | 55 | static void fetch_core_registers (char *, unsigned, int, CORE_ADDR); |
c906108c | 56 | \f |
c5aa993b | 57 | |
c906108c SS |
58 | /* this table must line up with REGISTER_NAMES in tm-i386v.h */ |
59 | /* symbols like 'EAX' come from <sys/reg.h> */ | |
c5aa993b | 60 | static int regmap[] = |
c906108c SS |
61 | { |
62 | EAX, ECX, EDX, EBX, | |
63 | USP, EBP, ESI, EDI, | |
64 | EIP, EFL, CS, SS, | |
65 | DS, ES, FS, GS, | |
66 | }; | |
67 | ||
68 | /* blockend is the value of u.u_ar0, and points to the | |
69 | * place where GS is stored | |
70 | */ | |
71 | ||
72 | int | |
fba45db2 | 73 | i386_register_u_addr (int blockend, int regnum) |
c906108c SS |
74 | { |
75 | #if 0 | |
76 | /* this will be needed if fp registers are reinstated */ | |
77 | /* for now, you can look at them with 'info float' | |
78 | * sys5 wont let you change them with ptrace anyway | |
79 | */ | |
c5aa993b | 80 | if (regnum >= FP0_REGNUM && regnum <= FP7_REGNUM) |
c906108c SS |
81 | { |
82 | int ubase, fpstate; | |
83 | struct user u; | |
84 | ubase = blockend + 4 * (SS + 1) - KSTKSZ; | |
c5aa993b | 85 | fpstate = ubase + ((char *) &u.u_fpstate - (char *) &u); |
c906108c | 86 | return (fpstate + 0x1c + 10 * (regnum - FP0_REGNUM)); |
c5aa993b | 87 | } |
c906108c SS |
88 | else |
89 | #endif | |
90 | return (blockend + 4 * regmap[regnum]); | |
c5aa993b | 91 | |
c906108c SS |
92 | } |
93 | ||
94 | /* The code below only work on the aix ps/2 (i386-ibm-aix) - | |
95 | * mtranle@paris - Sat Apr 11 10:34:12 1992 | |
96 | */ | |
97 | ||
c5aa993b | 98 | struct env387 |
c906108c SS |
99 | { |
100 | unsigned short control; | |
101 | unsigned short r0; | |
102 | unsigned short status; | |
103 | unsigned short r1; | |
104 | unsigned short tag; | |
105 | unsigned short r2; | |
106 | unsigned long eip; | |
107 | unsigned short code_seg; | |
108 | unsigned short opcode; | |
109 | unsigned long operand; | |
110 | unsigned short operand_seg; | |
111 | unsigned short r3; | |
112 | unsigned char regs[8][10]; | |
113 | }; | |
114 | ||
115 | static | |
fba45db2 | 116 | print_387_status (unsigned short status, struct env387 *ep) |
c906108c SS |
117 | { |
118 | int i; | |
119 | int bothstatus; | |
120 | int top; | |
121 | int fpreg; | |
122 | unsigned char *p; | |
c5aa993b | 123 | |
c906108c | 124 | bothstatus = ((status != 0) && (ep->status != 0)); |
c5aa993b | 125 | if (status != 0) |
c906108c SS |
126 | { |
127 | if (bothstatus) | |
128 | printf_unfiltered ("u: "); | |
129 | print_387_status_word (status); | |
130 | } | |
c5aa993b JM |
131 | |
132 | if (ep->status != 0) | |
c906108c SS |
133 | { |
134 | if (bothstatus) | |
135 | printf_unfiltered ("e: "); | |
136 | print_387_status_word (ep->status); | |
137 | } | |
c5aa993b | 138 | |
c906108c SS |
139 | print_387_control_word (ep->control); |
140 | printf_unfiltered ("last exception: "); | |
c5aa993b JM |
141 | printf_unfiltered ("opcode %s; ", local_hex_string (ep->opcode)); |
142 | printf_unfiltered ("pc %s:", local_hex_string (ep->code_seg)); | |
143 | printf_unfiltered ("%s; ", local_hex_string (ep->eip)); | |
144 | printf_unfiltered ("operand %s", local_hex_string (ep->operand_seg)); | |
145 | printf_unfiltered (":%s\n", local_hex_string (ep->operand)); | |
c906108c SS |
146 | |
147 | top = ((ep->status >> 11) & 7); | |
148 | ||
149 | printf_unfiltered ("regno tag msb lsb value\n"); | |
c5aa993b | 150 | for (fpreg = 7; fpreg >= 0; fpreg--) |
c906108c SS |
151 | { |
152 | double val; | |
153 | ||
154 | printf_unfiltered ("%s %d: ", fpreg == top ? "=>" : " ", fpreg); | |
155 | ||
c5aa993b | 156 | switch ((ep->tag >> ((7 - fpreg) * 2)) & 3) |
c906108c | 157 | { |
c5aa993b JM |
158 | case 0: |
159 | printf_unfiltered ("valid "); | |
160 | break; | |
161 | case 1: | |
162 | printf_unfiltered ("zero "); | |
163 | break; | |
164 | case 2: | |
165 | printf_unfiltered ("trap "); | |
166 | break; | |
167 | case 3: | |
168 | printf_unfiltered ("empty "); | |
169 | break; | |
c906108c SS |
170 | } |
171 | for (i = 9; i >= 0; i--) | |
172 | printf_unfiltered ("%02x", ep->regs[fpreg][i]); | |
c5aa993b JM |
173 | |
174 | i387_to_double ((char *) ep->regs[fpreg], (char *) &val); | |
c906108c SS |
175 | printf_unfiltered (" %#g\n", val); |
176 | } | |
177 | } | |
178 | ||
179 | static struct env387 core_env387; | |
180 | ||
181 | void | |
fba45db2 | 182 | i386_float_info (void) |
c906108c SS |
183 | { |
184 | struct env387 fps; | |
185 | int fpsaved = 0; | |
186 | /* We need to reverse the order of the registers. Apparently AIX stores | |
187 | the highest-numbered ones first. */ | |
188 | struct env387 fps_fixed; | |
189 | int i; | |
190 | ||
191 | if (inferior_pid) | |
192 | { | |
193 | char buf[10]; | |
194 | unsigned short status; | |
195 | ||
c5aa993b | 196 | ptrace (PT_READ_FPR, inferior_pid, buf, offsetof (struct env387, status)); |
c906108c SS |
197 | memcpy (&status, buf, sizeof (status)); |
198 | fpsaved = status; | |
199 | } | |
200 | else | |
201 | { | |
202 | if ((fpsaved = core_env387.status) != 0) | |
c5aa993b | 203 | memcpy (&fps, &core_env387, sizeof (fps)); |
c906108c | 204 | } |
c5aa993b JM |
205 | |
206 | if (fpsaved == 0) | |
c906108c SS |
207 | { |
208 | printf_unfiltered ("no floating point status saved\n"); | |
209 | return; | |
210 | } | |
211 | ||
212 | if (inferior_pid) | |
213 | { | |
214 | int offset; | |
c5aa993b | 215 | for (offset = 0; offset < sizeof (fps); offset += 10) |
c906108c SS |
216 | { |
217 | char buf[10]; | |
218 | ptrace (PT_READ_FPR, inferior_pid, buf, offset); | |
c5aa993b JM |
219 | memcpy ((char *) &fps.control + offset, buf, |
220 | MIN (10, sizeof (fps) - offset)); | |
c906108c | 221 | } |
c5aa993b | 222 | } |
c906108c SS |
223 | fps_fixed = fps; |
224 | for (i = 0; i < 8; ++i) | |
225 | memcpy (fps_fixed.regs[i], fps.regs[7 - i], 10); | |
226 | print_387_status (0, &fps_fixed); | |
227 | } | |
228 | ||
229 | /* Fetch one register. */ | |
230 | static void | |
fba45db2 | 231 | fetch_register (int regno) |
c906108c SS |
232 | { |
233 | char buf[MAX_REGISTER_RAW_SIZE]; | |
234 | if (regno < FP0_REGNUM) | |
c5aa993b JM |
235 | *(int *) buf = ptrace (PT_READ_GPR, inferior_pid, |
236 | PT_REG (regmap[regno]), 0, 0); | |
c906108c SS |
237 | else |
238 | ptrace (PT_READ_FPR, inferior_pid, buf, | |
c5aa993b | 239 | (regno - FP0_REGNUM) * 10 + offsetof (struct env387, regs)); |
c906108c SS |
240 | supply_register (regno, buf); |
241 | } | |
242 | ||
243 | void | |
fba45db2 | 244 | fetch_inferior_registers (int regno) |
c906108c SS |
245 | { |
246 | if (regno < 0) | |
247 | for (regno = 0; regno < NUM_REGS; regno++) | |
248 | fetch_register (regno); | |
249 | else | |
250 | fetch_register (regno); | |
251 | } | |
252 | ||
253 | /* store one register */ | |
254 | static void | |
fba45db2 | 255 | store_register (int regno) |
c906108c SS |
256 | { |
257 | char buf[80]; | |
c906108c SS |
258 | errno = 0; |
259 | if (regno < FP0_REGNUM) | |
c5aa993b | 260 | ptrace (PT_WRITE_GPR, inferior_pid, PT_REG (regmap[regno]), |
c906108c SS |
261 | *(int *) ®isters[REGISTER_BYTE (regno)], 0); |
262 | else | |
263 | ptrace (PT_WRITE_FPR, inferior_pid, ®isters[REGISTER_BYTE (regno)], | |
c5aa993b | 264 | (regno - FP0_REGNUM) * 10 + offsetof (struct env387, regs)); |
c906108c SS |
265 | |
266 | if (errno != 0) | |
267 | { | |
268 | sprintf (buf, "writing register number %d", regno); | |
269 | perror_with_name (buf); | |
270 | } | |
271 | } | |
272 | ||
273 | /* Store our register values back into the inferior. | |
274 | If REGNO is -1, do this for all registers. | |
275 | Otherwise, REGNO specifies which register (so we can save time). */ | |
276 | void | |
fba45db2 | 277 | store_inferior_registers (int regno) |
c906108c SS |
278 | { |
279 | if (regno < 0) | |
280 | for (regno = 0; regno < NUM_REGS; regno++) | |
281 | store_register (regno); | |
282 | else | |
283 | store_register (regno); | |
284 | } | |
285 | ||
286 | #ifndef CD_AX /* defined in sys/i386/coredump.h */ | |
c5aa993b JM |
287 | #define CD_AX 0 |
288 | #define CD_BX 1 | |
289 | #define CD_CX 2 | |
290 | #define CD_DX 3 | |
291 | #define CD_SI 4 | |
292 | #define CD_DI 5 | |
293 | #define CD_BP 6 | |
294 | #define CD_SP 7 | |
295 | #define CD_FL 8 | |
296 | #define CD_IP 9 | |
297 | #define CD_CS 10 | |
298 | #define CD_DS 11 | |
299 | #define CD_ES 12 | |
300 | #define CD_FS 13 | |
301 | #define CD_GS 14 | |
302 | #define CD_SS 15 | |
c906108c SS |
303 | #endif |
304 | ||
305 | /* | |
306 | * The order here in core_regmap[] has to be the same as in | |
307 | * regmap[] above. | |
308 | */ | |
c5aa993b | 309 | static int core_regmap[] = |
c906108c SS |
310 | { |
311 | CD_AX, CD_CX, CD_DX, CD_BX, | |
312 | CD_SP, CD_BP, CD_SI, CD_DI, | |
313 | CD_IP, CD_FL, CD_CS, CD_SS, | |
314 | CD_DS, CD_ES, CD_FS, CD_GS, | |
315 | }; | |
316 | ||
317 | static void | |
318 | fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr) | |
319 | char *core_reg_sect; | |
320 | unsigned core_reg_size; | |
321 | int which; | |
322 | CORE_ADDR reg_addr; /* ignored */ | |
323 | { | |
324 | ||
325 | if (which == 0) | |
326 | { | |
327 | /* Integer registers */ | |
328 | ||
329 | #define cd_regs(n) ((int *)core_reg_sect)[n] | |
330 | #define regs(n) *((int *) ®isters[REGISTER_BYTE (n)]) | |
331 | ||
332 | int i; | |
333 | for (i = 0; i < FP0_REGNUM; i++) | |
c5aa993b | 334 | regs (i) = cd_regs (core_regmap[i]); |
c906108c SS |
335 | } |
336 | else if (which == 2) | |
337 | { | |
338 | /* Floating point registers */ | |
339 | ||
340 | if (core_reg_size >= sizeof (core_env387)) | |
341 | memcpy (&core_env387, core_reg_sect, core_reg_size); | |
342 | else | |
343 | fprintf_unfiltered (gdb_stderr, "Couldn't read float regs from core file\n"); | |
344 | } | |
345 | } | |
c906108c | 346 | \f |
c5aa993b | 347 | |
c906108c SS |
348 | /* Register that we are able to handle i386aix core file formats. |
349 | FIXME: is this really bfd_target_unknown_flavour? */ | |
350 | ||
351 | static struct core_fns i386aix_core_fns = | |
352 | { | |
2acceee2 JM |
353 | bfd_target_unknown_flavour, /* core_flavour */ |
354 | default_check_format, /* check_format */ | |
355 | default_core_sniffer, /* core_sniffer */ | |
356 | fetch_core_registers, /* core_read_registers */ | |
357 | NULL /* next */ | |
c906108c SS |
358 | }; |
359 | ||
360 | void | |
fba45db2 | 361 | _initialize_core_i386aix (void) |
c906108c SS |
362 | { |
363 | add_core_fns (&i386aix_core_fns); | |
364 | } |