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c70a4827 C |
1 | /* Definitions to make GDB run on a Sequent Symmetry under dynix 3.0, |
2 | with Weitek 1167 and i387 support. | |
3 | Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GDB. | |
6 | ||
7 | GDB 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 1, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GDB 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. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GDB; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
20 | ||
21 | /* Symmetry version by Jay Vosburgh (uunet!sequent!fubar) */ | |
22 | ||
23 | #include <machine/reg.h> | |
24 | ||
25 | #define SYMMETRY | |
26 | ||
27 | /* This machine doesn't have the siginterrupt call. */ | |
28 | #define NO_SIGINTERRUPT | |
29 | ||
30 | #define HAVE_WAIT_STRUCT | |
31 | ||
32 | /* Define the bit, byte, and word ordering of the machine. */ | |
33 | /* #define BITS_BIG_ENDIAN */ | |
34 | /* #define BYTES_BIG_ENDIAN */ | |
35 | /* #define WORDS_BIG_ENDIAN */ | |
36 | ||
37 | /* Define SFILE_FN_FLAGGED if the source file is flagged with an N_FN | |
38 | symbol instead of an N_TEXT symbol. */ | |
39 | ||
40 | #define OFILE_FN_FLAGGED | |
41 | ||
42 | /* Get rid of any system-imposed stack limit if possible. */ | |
43 | ||
44 | #define SET_STACK_LIMIT_HUGE | |
45 | ||
46 | /* Define this if the C compiler puts an underscore at the front | |
47 | of external names before giving them to the linker. */ | |
48 | ||
49 | #define NAMES_HAVE_UNDERSCORE | |
50 | ||
51 | /* Debugger information will be in DBX format. */ | |
52 | ||
53 | #define READ_DBX_FORMAT | |
54 | ||
55 | /* Offset from address of function to start of its code. | |
56 | Zero on most machines. */ | |
57 | ||
58 | #define FUNCTION_START_OFFSET 0 | |
59 | ||
60 | /* Advance PC across any function entry prologue instructions | |
61 | to reach some "real" code. From m-i386.h */ | |
62 | ||
63 | #define SKIP_PROLOGUE(frompc) {(frompc) = i386_skip_prologue((frompc));} | |
64 | ||
65 | /* Immediately after a function call, return the saved pc. | |
66 | Can't always go through the frames for this because on some machines | |
67 | the new frame is not set up until the new function executes | |
68 | some instructions. */ | |
69 | ||
70 | #define SAVED_PC_AFTER_CALL(frame) \ | |
71 | read_memory_integer(read_register(SP_REGNUM), 4) | |
72 | ||
73 | /* This is the amount to subtract from u.u_ar0 | |
74 | to get the offset in the core file of the register values. */ | |
75 | ||
76 | #define KERNEL_U_ADDR (0x80000000 - (UPAGES * NBPG)) | |
77 | ||
78 | /* Address of end of stack space. */ | |
79 | ||
80 | #define STACK_END_ADDR (0x40000000 - (UPAGES * NBPG)) | |
81 | ||
82 | /* Stack grows downward. */ | |
83 | ||
84 | #define INNER_THAN < | |
85 | ||
86 | /* Sequence of bytes for breakpoint instruction. */ | |
87 | ||
88 | #define BREAKPOINT {0xcc} | |
89 | ||
90 | /* Amount PC must be decremented by after a breakpoint. | |
91 | This is often the number of bytes in BREAKPOINT | |
92 | but not always. */ | |
93 | ||
94 | #define DECR_PC_AFTER_BREAK 0 | |
95 | ||
96 | /* Nonzero if instruction at PC is a return instruction. */ | |
97 | /* For Symmetry, this is really the 'leave' instruction, which */ | |
98 | /* is right before the ret */ | |
99 | ||
100 | #define ABOUT_TO_RETURN(pc) (read_memory_integer (pc, 1) == 0xc9) | |
101 | ||
102 | /* Return 1 if P points to an invalid floating point value. | |
103 | */ | |
104 | ||
105 | #define INVALID_FLOAT(p, len) (0) | |
106 | ||
107 | /* code for 80387 fpu. Functions are from i386-dep.c, copied into | |
108 | * symm-dep.c. | |
109 | */ | |
110 | #define FLOAT_INFO { i386_float_info(); } | |
111 | ||
112 | /* largest int type */ | |
113 | #define LONGEST long | |
114 | ||
115 | #define BUILTIN_TYPE_LONGEST builtin_type_long | |
116 | ||
117 | ||
118 | /* Say how long (ordinary) registers are. */ | |
119 | ||
120 | #define REGISTER_TYPE long | |
121 | ||
122 | /* Number of machine registers */ | |
123 | #define NUM_REGS 49 | |
124 | ||
125 | /* Initializer for an array of names of registers. | |
126 | There should be NUM_REGS strings in this initializer. */ | |
127 | ||
128 | /* Symmetry registers are in this weird order to match the register | |
129 | numbers in the symbol table entries. If you change the order, | |
130 | things will probably break mysteriously for no apparent reason. | |
131 | Also note that the st(0)...st(7) 387 registers are represented as | |
132 | st0...st7. */ | |
133 | ||
134 | #define REGISTER_NAMES { "eax", "edx", "ecx", "st0", "st1", \ | |
135 | "ebx", "esi", "edi", "st2", "st3", \ | |
136 | "st4", "st5", "st6", "st7", "esp", \ | |
137 | "ebp", "eip", "eflags", "fp1", "fp2", \ | |
138 | "fp3", "fp4", "fp5", "fp6", "fp7", \ | |
139 | "fp8", "fp9", "fp10", "fp11", "fp12", \ | |
140 | "fp13", "fp14", "fp15", "fp16", "fp17", \ | |
141 | "fp18", "fp19", "fp20", "fp21", "fp22", \ | |
142 | "fp23", "fp24", "fp25", "fp26", "fp27", \ | |
143 | "fp28", "fp29", "fp30", "fp31" } | |
144 | ||
145 | /* Register numbers of various important registers. | |
146 | Note that some of these values are "real" register numbers, | |
147 | and correspond to the general registers of the machine, | |
148 | and some are "phony" register numbers which are too large | |
149 | to be actual register numbers as far as the user is concerned | |
150 | but do serve to get the desired values when passed to read_register. */ | |
151 | ||
152 | #define FP1_REGNUM 18 /* first 1167 register */ | |
153 | #define SP_REGNUM 14 /* Contains address of top of stack */ | |
154 | #define FP_REGNUM 15 /* Contains address of executing stack frame */ | |
155 | #define PC_REGNUM 16 /* Contains program counter */ | |
156 | #define PS_REGNUM 17 /* Contains processor status */ | |
157 | ||
158 | /* The magic numbers below are offsets into u_ar0 in the user struct. | |
159 | * They live in <machine/reg.h>. Gdb calls this macro with blockend | |
160 | * holding u.u_ar0 - KERNEL_U_ADDR. Only the registers listed are | |
161 | * saved in the u area (along with a few others that aren't useful | |
162 | * here. See <machine/reg.h>). | |
163 | */ | |
164 | ||
165 | #define REGISTER_U_ADDR(addr, blockend, regno) \ | |
166 | { struct user foo; /* needed for finding fpu regs */ \ | |
167 | switch (regno) { \ | |
168 | case 0: \ | |
169 | addr = blockend + EAX * sizeof(int); break; \ | |
170 | case 1: \ | |
171 | addr = blockend + EDX * sizeof(int); break; \ | |
172 | case 2: \ | |
173 | addr = blockend + ECX * sizeof(int); break; \ | |
174 | case 3: /* st(0) */ \ | |
175 | addr = blockend - \ | |
176 | ((int)&foo.u_fpusave.fpu_stack[0][0] - (int)&foo); \ | |
177 | break; \ | |
178 | case 4: /* st(1) */ \ | |
179 | addr = blockend - \ | |
180 | ((int) &foo.u_fpusave.fpu_stack[1][0] - (int)&foo); \ | |
181 | break; \ | |
182 | case 5: \ | |
183 | addr = blockend + EBX * sizeof(int); break; \ | |
184 | case 6: \ | |
185 | addr = blockend + ESI * sizeof(int); break; \ | |
186 | case 7: \ | |
187 | addr = blockend + EDI * sizeof(int); break; \ | |
188 | case 8: /* st(2) */ \ | |
189 | addr = blockend - \ | |
190 | ((int) &foo.u_fpusave.fpu_stack[2][0] - (int)&foo); \ | |
191 | break; \ | |
192 | case 9: /* st(3) */ \ | |
193 | addr = blockend - \ | |
194 | ((int) &foo.u_fpusave.fpu_stack[3][0] - (int)&foo); \ | |
195 | break; \ | |
196 | case 10: /* st(4) */ \ | |
197 | addr = blockend - \ | |
198 | ((int) &foo.u_fpusave.fpu_stack[4][0] - (int)&foo); \ | |
199 | break; \ | |
200 | case 11: /* st(5) */ \ | |
201 | addr = blockend - \ | |
202 | ((int) &foo.u_fpusave.fpu_stack[5][0] - (int)&foo); \ | |
203 | break; \ | |
204 | case 12: /* st(6) */ \ | |
205 | addr = blockend - \ | |
206 | ((int) &foo.u_fpusave.fpu_stack[6][0] - (int)&foo); \ | |
207 | break; \ | |
208 | case 13: /* st(7) */ \ | |
209 | addr = blockend - \ | |
210 | ((int) &foo.u_fpusave.fpu_stack[7][0] - (int)&foo); \ | |
211 | break; \ | |
212 | case 14: \ | |
213 | addr = blockend + ESP * sizeof(int); break; \ | |
214 | case 15: \ | |
215 | addr = blockend + EBP * sizeof(int); break; \ | |
216 | case 16: \ | |
217 | addr = blockend + EIP * sizeof(int); break; \ | |
218 | case 17: \ | |
219 | addr = blockend + FLAGS * sizeof(int); break; \ | |
220 | case 18: /* fp1 */ \ | |
221 | case 19: /* fp2 */ \ | |
222 | case 20: /* fp3 */ \ | |
223 | case 21: /* fp4 */ \ | |
224 | case 22: /* fp5 */ \ | |
225 | case 23: /* fp6 */ \ | |
226 | case 24: /* fp7 */ \ | |
227 | case 25: /* fp8 */ \ | |
228 | case 26: /* fp9 */ \ | |
229 | case 27: /* fp10 */ \ | |
230 | case 28: /* fp11 */ \ | |
231 | case 29: /* fp12 */ \ | |
232 | case 30: /* fp13 */ \ | |
233 | case 31: /* fp14 */ \ | |
234 | case 32: /* fp15 */ \ | |
235 | case 33: /* fp16 */ \ | |
236 | case 34: /* fp17 */ \ | |
237 | case 35: /* fp18 */ \ | |
238 | case 36: /* fp19 */ \ | |
239 | case 37: /* fp20 */ \ | |
240 | case 38: /* fp21 */ \ | |
241 | case 39: /* fp22 */ \ | |
242 | case 40: /* fp23 */ \ | |
243 | case 41: /* fp24 */ \ | |
244 | case 42: /* fp25 */ \ | |
245 | case 43: /* fp26 */ \ | |
246 | case 44: /* fp27 */ \ | |
247 | case 45: /* fp28 */ \ | |
248 | case 46: /* fp29 */ \ | |
249 | case 47: /* fp30 */ \ | |
250 | case 48: /* fp31 */ \ | |
251 | addr = blockend - \ | |
252 | ((int) &foo.u_fpasave.fpa_regs[(regno)-18] - (int)&foo); \ | |
253 | } \ | |
254 | } | |
255 | ||
256 | /* Total amount of space needed to store our copies of the machine's | |
257 | register state, the array `registers'. */ | |
258 | /* 10 i386 registers, 8 i387 registers, and 31 Weitek 1167 registers */ | |
259 | #define REGISTER_BYTES ((10 * 4) + (8 * 10) + (31 * 4)) | |
260 | ||
261 | /* Index within `registers' of the first byte of the space for | |
262 | register N. */ | |
263 | ||
264 | #define REGISTER_BYTE(N) \ | |
265 | ((N < 3) ? (N * 4) : \ | |
266 | (N < 5) ? (((N - 2) * 10) + 2) : \ | |
267 | (N < 8) ? (((N - 5) * 4) + 32) : \ | |
268 | (N < 14) ? (((N - 8) * 10) + 44) : \ | |
269 | (((N - 14) * 4) + 104)) | |
270 | ||
271 | /* Number of bytes of storage in the actual machine representation | |
272 | * for register N. All registers are 4 bytes, except 387 st(0) - st(7), | |
273 | * which are 80 bits each. | |
274 | */ | |
275 | ||
276 | #define REGISTER_RAW_SIZE(N) \ | |
277 | ((N < 3) ? 4 : \ | |
278 | (N < 5) ? 10 : \ | |
279 | (N < 8) ? 4 : \ | |
280 | (N < 14) ? 10 : \ | |
281 | 4) | |
282 | ||
283 | /* Number of bytes of storage in the program's representation | |
284 | for register N. On the vax, all regs are 4 bytes. */ | |
285 | ||
286 | #define REGISTER_VIRTUAL_SIZE(N) 4 | |
287 | ||
288 | /* Largest value REGISTER_RAW_SIZE can have. */ | |
289 | ||
290 | #define MAX_REGISTER_RAW_SIZE 10 | |
291 | ||
292 | /* Largest value REGISTER_VIRTUAL_SIZE can have. */ | |
293 | ||
294 | #define MAX_REGISTER_VIRTUAL_SIZE 4 | |
295 | ||
296 | /* Nonzero if register N requires conversion | |
297 | from raw format to virtual format. */ | |
298 | ||
299 | #define REGISTER_CONVERTIBLE(N) \ | |
300 | ((N < 3) ? 0 : \ | |
301 | (N < 5) ? 1 : \ | |
302 | (N < 8) ? 0 : \ | |
303 | (N < 14) ? 1 : \ | |
304 | 0) | |
305 | ||
306 | /* Convert data from raw format for register REGNUM | |
307 | to virtual format for register REGNUM. */ | |
308 | ||
309 | #define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO) \ | |
310 | ((REGNUM < 3) ? bcopy ((FROM), (TO), 4) : \ | |
311 | (REGNUM < 5) ? i387_to_double((FROM), (TO)) : \ | |
312 | (REGNUM < 8) ? bcopy ((FROM), (TO), 4) : \ | |
313 | (REGNUM < 14) ? i387_to_double((FROM), (TO)) : \ | |
314 | bcopy ((FROM), (TO), 4)) | |
315 | ||
316 | /* Convert data from virtual format for register REGNUM | |
317 | to raw format for register REGNUM. */ | |
318 | ||
319 | #define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO) \ | |
320 | ((REGNUM < 3) ? bcopy ((FROM), (TO), 4) : \ | |
321 | (REGNUM < 5) ? double_to_i387((FROM), (TO)) : \ | |
322 | (REGNUM < 8) ? bcopy ((FROM), (TO), 4) : \ | |
323 | (REGNUM < 14) ? double_to_i387((FROM), (TO)) : \ | |
324 | bcopy ((FROM), (TO), 4)) | |
325 | ||
326 | /* Return the GDB type object for the "standard" data type | |
327 | of data in register N. */ | |
328 | ||
329 | #define REGISTER_VIRTUAL_TYPE(N) \ | |
330 | ((N < 3) ? builtin_type_int : \ | |
331 | (N < 5) ? builtin_type_double : \ | |
332 | (N < 8) ? builtin_type_int : \ | |
333 | (N < 14) ? builtin_type_double : \ | |
334 | builtin_type_int) | |
335 | ||
336 | /* from m-i386.h */ | |
337 | /* Store the address of the place in which to copy the structure the | |
338 | subroutine will return. This is called from call_function. */ | |
339 | ||
340 | #define STORE_STRUCT_RETURN(ADDR, SP) \ | |
341 | { (SP) -= sizeof (ADDR); \ | |
342 | write_memory ((SP), &(ADDR), sizeof (ADDR)); \ | |
343 | write_register(0, (ADDR)); } | |
344 | ||
345 | /* Extract from an array REGBUF containing the (raw) register state | |
346 | a function return value of type TYPE, and copy that, in virtual format, | |
347 | into VALBUF. */ | |
348 | ||
349 | #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ | |
350 | symmetry_extract_return_value(TYPE, REGBUF, VALBUF) | |
351 | ||
352 | /* Write into appropriate registers a function return value | |
353 | of type TYPE, given in virtual format. */ | |
354 | ||
355 | #define STORE_RETURN_VALUE(TYPE,VALBUF) \ | |
356 | write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE)) | |
357 | ||
358 | /* Extract from an array REGBUF containing the (raw) register state | |
359 | the address in which a function should return its structure value, | |
360 | as a CORE_ADDR (or an expression that can be used as one). */ | |
361 | ||
362 | #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(int *)(REGBUF)) | |
363 | ||
364 | /* Compensate for lack of `vprintf' function. */ | |
365 | #ifndef HAVE_VPRINTF | |
366 | #define vprintf(format, ap) _doprnt (format, ap, stdout) | |
367 | #endif /* not HAVE_VPRINTF */ | |
368 | \f | |
369 | /* Describe the pointer in each stack frame to the previous stack frame | |
370 | (its caller). */ | |
371 | ||
372 | /* FRAME_CHAIN takes a frame's nominal address | |
373 | and produces the frame's chain-pointer. | |
374 | ||
375 | FRAME_CHAIN_COMBINE takes the chain pointer and the frame's nominal address | |
376 | and produces the nominal address of the caller frame. | |
377 | ||
378 | However, if FRAME_CHAIN_VALID returns zero, | |
379 | it means the given frame is the outermost one and has no caller. | |
380 | In that case, FRAME_CHAIN_COMBINE is not used. */ | |
381 | ||
382 | /* On Symmetry, %ebp points to caller's %ebp, and the return address | |
383 | is right on top of that. | |
384 | */ | |
385 | ||
386 | #define FRAME_CHAIN(thisframe) \ | |
387 | (outside_startup_file ((thisframe)->pc) ? \ | |
388 | read_memory_integer((thisframe)->frame, 4) :\ | |
389 | 0) | |
390 | ||
391 | #define FRAME_CHAIN_VALID(chain, thisframe) \ | |
392 | (chain != 0) | |
393 | ||
394 | #define FRAME_CHAIN_COMBINE(chain, thisframe) (chain) | |
395 | ||
396 | /* Define other aspects of the stack frame. */ | |
397 | ||
398 | /* A macro that tells us whether the function invocation represented | |
399 | by FI does not have a frame on the stack associated with it. If it | |
400 | does not, FRAMELESS is set to 1, else 0. */ | |
401 | #define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \ | |
402 | FRAMELESS_LOOK_FOR_PROLOGUE(FI, FRAMELESS) | |
403 | ||
404 | #define FRAME_SAVED_PC(fi) (read_memory_integer((fi)->frame + 4, 4)) | |
405 | ||
406 | #define FRAME_ARGS_ADDRESS(fi) ((fi)->frame) | |
407 | ||
408 | #define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame) | |
409 | ||
410 | /* Return number of args passed to a frame. | |
411 | Can return -1, meaning no way to tell. | |
412 | ||
413 | The weirdness in the "addl $imm8" case is due to gcc sometimes | |
414 | issuing "addl $-int" after function call returns; this would | |
415 | produce ridiculously huge arg counts. */ | |
416 | ||
417 | #define FRAME_NUM_ARGS(numargs, fi) \ | |
418 | { \ | |
419 | int op = read_memory_integer(FRAME_SAVED_PC((fi)), 4); \ | |
420 | int narg; \ | |
421 | if ((op & 0xff) == 0x59) /* 0x59 'popl %ecx' */ \ | |
422 | { \ | |
423 | numargs = 1; \ | |
424 | } \ | |
425 | else if ((op & 0xffff) == 0xc483) /* 0xc483 'addl $imm8' */ \ | |
426 | { \ | |
427 | narg = ((op >> 16) & 0xff); \ | |
428 | numargs = (narg >= 128) ? -1 : narg / 4; \ | |
429 | } \ | |
430 | else if ((op & 0xffff) == 0xc481) /* 0xc481 'addl $imm32' */ \ | |
431 | { \ | |
432 | narg = read_memory_integer(FRAME_SAVED_PC((fi))+2,4); \ | |
433 | numargs = (narg < 0) ? -1 : narg / 4; \ | |
434 | } \ | |
435 | else \ | |
436 | { \ | |
437 | numargs = -1; \ | |
438 | } \ | |
439 | } | |
440 | ||
441 | /* Return number of bytes at start of arglist that are not really args. */ | |
442 | ||
443 | #define FRAME_ARGS_SKIP 8 | |
444 | ||
445 | /* Put here the code to store, into a struct frame_saved_regs, | |
446 | the addresses of the saved registers of frame described by FRAME_INFO. | |
447 | This includes special registers such as pc and fp saved in special | |
448 | ways in the stack frame. sp is even more special: | |
449 | the address we return for it IS the sp for the next frame. */ | |
450 | ||
451 | #define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \ | |
452 | { i386_frame_find_saved_regs ((frame_info), &(frame_saved_regs)); } | |
453 | ||
454 | \f | |
455 | /* Things needed for making the inferior call functions. */ | |
456 | ||
457 | #define PUSH_DUMMY_FRAME \ | |
458 | { CORE_ADDR sp = read_register (SP_REGNUM); \ | |
459 | int regnum; \ | |
460 | sp = push_word (sp, read_register (PC_REGNUM)); \ | |
461 | sp = push_word (sp, read_register (FP_REGNUM)); \ | |
462 | write_register (FP_REGNUM, sp); \ | |
463 | for (regnum = 0; regnum < NUM_REGS; regnum++) \ | |
464 | sp = push_word (sp, read_register (regnum)); \ | |
465 | write_register (SP_REGNUM, sp); \ | |
466 | } | |
467 | ||
468 | #define POP_FRAME \ | |
469 | { \ | |
470 | FRAME frame = get_current_frame (); \ | |
471 | CORE_ADDR fp; \ | |
472 | int regnum; \ | |
473 | struct frame_saved_regs fsr; \ | |
474 | struct frame_info *fi; \ | |
475 | fi = get_frame_info (frame); \ | |
476 | fp = fi->frame; \ | |
477 | get_frame_saved_regs (fi, &fsr); \ | |
478 | for (regnum = 0; regnum < NUM_REGS; regnum++) { \ | |
479 | CORE_ADDR adr; \ | |
480 | adr = fsr.regs[regnum]; \ | |
481 | if (adr) \ | |
482 | write_register (regnum, read_memory_integer (adr, 4)); \ | |
483 | } \ | |
484 | write_register (FP_REGNUM, read_memory_integer (fp, 4)); \ | |
485 | write_register (PC_REGNUM, read_memory_integer (fp + 4, 4)); \ | |
486 | write_register (SP_REGNUM, fp + 8); \ | |
487 | flush_cached_frames (); \ | |
488 | set_current_frame ( create_new_frame (read_register (FP_REGNUM), \ | |
489 | read_pc ())); \ | |
490 | } | |
491 | ||
492 | /* from i386-dep.c, worked better than my original... */ | |
493 | /* This sequence of words is the instructions | |
494 | * call (32-bit offset) | |
495 | * int 3 | |
496 | * This is 6 bytes. | |
497 | */ | |
498 | ||
499 | #define CALL_DUMMY { 0x223344e8, 0xcc11 } | |
500 | ||
501 | #define CALL_DUMMY_LENGTH 8 | |
502 | ||
503 | #define CALL_DUMMY_START_OFFSET 0 /* Start execution at beginning of dummy */ | |
504 | ||
505 | /* Insert the specified number of args and function address | |
506 | into a call sequence of the above form stored at DUMMYNAME. */ | |
507 | ||
508 | #define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, type) \ | |
509 | { \ | |
510 | int from, to, delta, loc; \ | |
511 | loc = (int)(read_register (SP_REGNUM) - CALL_DUMMY_LENGTH); \ | |
512 | from = loc + 5; \ | |
513 | to = (int)(fun); \ | |
514 | delta = to - from; \ | |
515 | *(int *)((char *)(dummyname) + 1) = delta; \ | |
516 | } | |
517 | \f | |
518 | /* Interface definitions for kernel debugger KDB. */ | |
519 | /* This doesn't work... */ | |
520 | /* Map machine fault codes into signal numbers. | |
521 | First subtract 0, divide by 4, then index in a table. | |
522 | Faults for which the entry in this table is 0 | |
523 | are not handled by KDB; the program's own trap handler | |
524 | gets to handle then. */ | |
525 | ||
526 | #define FAULT_CODE_ORIGIN 0 | |
527 | #define FAULT_CODE_UNITS 4 | |
528 | #define FAULT_TABLE \ | |
529 | { 0, SIGKILL, SIGSEGV, 0, 0, 0, 0, 0, \ | |
530 | 0, 0, SIGTRAP, SIGTRAP, 0, 0, 0, 0, \ | |
531 | 0, 0, 0, 0, 0, 0, 0, 0} | |
532 | ||
533 | /* Start running with a stack stretching from BEG to END. | |
534 | BEG and END should be symbols meaningful to the assembler. | |
535 | This is used only for kdb. */ | |
536 | ||
537 | #define INIT_STACK(beg, end) \ | |
538 | { asm (".globl end"); \ | |
539 | asm ("movl $ end, %esp"); \ | |
540 | asm ("movl %ebp, $0"); } | |
541 | ||
542 | /* Push the frame pointer register on the stack. */ | |
543 | #define PUSH_FRAME_PTR \ | |
544 | asm ("pushl %ebp"); | |
545 | ||
546 | /* Copy the top-of-stack to the frame pointer register. */ | |
547 | #define POP_FRAME_PTR \ | |
548 | asm ("movl (%esp), %ebp"); | |
549 | ||
550 | /* After KDB is entered by a fault, push all registers | |
551 | that GDB thinks about (all NUM_REGS of them), | |
552 | so that they appear in order of ascending GDB register number. | |
553 | The fault code will be on the stack beyond the last register. */ | |
554 | ||
555 | #define PUSH_REGISTERS \ | |
556 | { asm("pushad"); } | |
557 | /* | |
558 | { asm("pushl %eax"); \ | |
559 | asm("pushl %edx"); \ | |
560 | asm("pushl %ecx"); \ | |
561 | asm("pushl %st(0)"); \ | |
562 | asm("pushl %st(1)"); \ | |
563 | asm("pushl %ebx"); \ | |
564 | asm("pushl %esi"); \ | |
565 | asm("pushl %edi"); \ | |
566 | asm("pushl %st(2)"); \ | |
567 | asm("pushl %st(3)"); \ | |
568 | asm("pushl %st(4)"); \ | |
569 | asm("pushl %st(5)"); \ | |
570 | asm("pushl %st(6)"); \ | |
571 | asm("pushl %st(7)"); \ | |
572 | asm("pushl %esp"); \ | |
573 | asm("pushl %ebp"); \ | |
574 | asm("pushl %eip"); \ | |
575 | asm("pushl %eflags"); \ | |
576 | asm("pushl %fp1"); \ | |
577 | asm("pushl %fp2"); \ | |
578 | asm("pushl %fp3"); \ | |
579 | asm("pushl %fp4"); \ | |
580 | asm("pushl %fp5"); \ | |
581 | asm("pushl %fp6"); \ | |
582 | asm("pushl %fp7"); \ | |
583 | asm("pushl %fp8"); \ | |
584 | asm("pushl %fp9"); \ | |
585 | asm("pushl %fp10"); \ | |
586 | asm("pushl %fp11"); \ | |
587 | asm("pushl %fp12"); \ | |
588 | asm("pushl %fp13"); \ | |
589 | asm("pushl %fp14"); \ | |
590 | asm("pushl %fp15"); \ | |
591 | asm("pushl %fp16"); \ | |
592 | asm("pushl %fp17"); \ | |
593 | asm("pushl %fp18"); \ | |
594 | asm("pushl %fp19"); \ | |
595 | asm("pushl %fp20"); \ | |
596 | asm("pushl %fp21"); \ | |
597 | asm("pushl %fp22"); \ | |
598 | asm("pushl %fp23"); \ | |
599 | asm("pushl %fp24"); \ | |
600 | asm("pushl %fp25"); \ | |
601 | asm("pushl %fp26"); \ | |
602 | asm("pushl %fp27"); \ | |
603 | asm("pushl %fp28"); \ | |
604 | asm("pushl %fp29"); \ | |
605 | asm("pushl %fp30"); \ | |
606 | asm("pushl %fp31"); \ | |
607 | } | |
608 | */ | |
609 | /* Assuming the registers (including processor status) have been | |
610 | pushed on the stack in order of ascending GDB register number, | |
611 | restore them and return to the address in the saved PC register. */ | |
612 | ||
613 | #define POP_REGISTERS \ | |
614 | { asm ("popad"); } |