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5076de82 FF |
1 | /* Target machine definitions for GDB on a Sequent Symmetry under dynix 3.0, |
2 | with Weitek 1167 and i387 support. | |
3 | Copyright 1986, 1987, 1989, 1991, 1992, 1993 Free Software Foundation, Inc. | |
56eec3c7 | 4 | Symmetry version by Jay Vosburgh (fubar@sequent.com). |
5076de82 FF |
5 | |
6 | This file is part of GDB. | |
7 | ||
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. | |
12 | ||
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. | |
17 | ||
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., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
21 | ||
22 | /* I don't know if this will work for cross-debugging, even if you do get | |
23 | a copy of the right include file. */ | |
56eec3c7 JK |
24 | #ifdef _SEQUENT_ |
25 | /* ptx */ | |
26 | #include <sys/reg.h> | |
27 | #else | |
28 | /* dynix */ | |
5076de82 | 29 | #include <machine/reg.h> |
56eec3c7 | 30 | #endif |
5076de82 | 31 | |
56eec3c7 JK |
32 | #ifdef _SEQUENT_ |
33 | /* ptx, not dynix */ | |
34 | #define SDB_REG_TO_REGNUM(value) ptx_coff_regno_to_gdb(value) | |
35 | extern int ptx_coff_regno_to_gdb(); | |
36 | #endif /* _SEQUENT_ */ | |
5076de82 | 37 | |
56eec3c7 | 38 | #define START_INFERIOR_TRAPS_EXPECTED 2 |
5076de82 FF |
39 | |
40 | /* Amount PC must be decremented by after a breakpoint. | |
41 | This is often the number of bytes in BREAKPOINT | |
42 | but not always. */ | |
43 | ||
44 | #define DECR_PC_AFTER_BREAK 0 | |
45 | ||
56eec3c7 JK |
46 | #include "i386/tm-i386v.h" |
47 | ||
5076de82 FF |
48 | /* Nonzero if instruction at PC is a return instruction. */ |
49 | /* For Symmetry, this is really the 'leave' instruction, which */ | |
50 | /* is right before the ret */ | |
51 | ||
56eec3c7 | 52 | #undef |
5076de82 FF |
53 | #define ABOUT_TO_RETURN(pc) (read_memory_integer (pc, 1) == 0xc9) |
54 | ||
5076de82 FF |
55 | #if 0 |
56 | --- this code can't be used unless we know we are running native, | |
57 | since it uses host specific ptrace calls. | |
58 | /* code for 80387 fpu. Functions are from i386-dep.c, copied into | |
59 | * symm-dep.c. | |
60 | */ | |
61 | #define FLOAT_INFO { i386_float_info(); } | |
62 | #endif | |
63 | ||
5076de82 | 64 | /* Number of machine registers */ |
56eec3c7 | 65 | #undef NUM_REGS |
5076de82 FF |
66 | #define NUM_REGS 49 |
67 | ||
68 | /* Initializer for an array of names of registers. | |
69 | There should be NUM_REGS strings in this initializer. */ | |
70 | ||
71 | /* Symmetry registers are in this weird order to match the register | |
72 | numbers in the symbol table entries. If you change the order, | |
73 | things will probably break mysteriously for no apparent reason. | |
74 | Also note that the st(0)...st(7) 387 registers are represented as | |
75 | st0...st7. */ | |
76 | ||
56eec3c7 | 77 | #undef REGISTER_NAMES |
5076de82 FF |
78 | #define REGISTER_NAMES { "eax", "edx", "ecx", "st0", "st1", \ |
79 | "ebx", "esi", "edi", "st2", "st3", \ | |
80 | "st4", "st5", "st6", "st7", "esp", \ | |
81 | "ebp", "eip", "eflags", "fp1", "fp2", \ | |
82 | "fp3", "fp4", "fp5", "fp6", "fp7", \ | |
83 | "fp8", "fp9", "fp10", "fp11", "fp12", \ | |
84 | "fp13", "fp14", "fp15", "fp16", "fp17", \ | |
85 | "fp18", "fp19", "fp20", "fp21", "fp22", \ | |
86 | "fp23", "fp24", "fp25", "fp26", "fp27", \ | |
87 | "fp28", "fp29", "fp30", "fp31" } | |
88 | ||
89 | /* Register numbers of various important registers. | |
90 | Note that some of these values are "real" register numbers, | |
91 | and correspond to the general registers of the machine, | |
92 | and some are "phony" register numbers which are too large | |
93 | to be actual register numbers as far as the user is concerned | |
94 | but do serve to get the desired values when passed to read_register. */ | |
95 | ||
56eec3c7 JK |
96 | #define EAX_REGNUM 0 |
97 | #define EDX_REGNUM 1 | |
98 | #define ECX_REGNUM 2 | |
99 | #define ST0_REGNUM 3 | |
100 | #define ST1_REGNUM 4 | |
101 | #define EBX_REGNUM 5 | |
102 | #define ESI_REGNUM 6 | |
103 | #define EDI_REGNUM 7 | |
104 | #define ST2_REGNUM 8 | |
105 | #define ST3_REGNUM 9 | |
106 | ||
107 | #define ST4_REGNUM 10 | |
108 | #define ST5_REGNUM 11 | |
109 | #define ST6_REGNUM 12 | |
110 | #define ST7_REGNUM 13 | |
111 | ||
5076de82 | 112 | #define FP1_REGNUM 18 /* first 1167 register */ |
56eec3c7 JK |
113 | /* Get %fp2 - %fp31 by addition, since they are contiguous */ |
114 | ||
115 | #undef SP_REGNUM | |
5076de82 | 116 | #define SP_REGNUM 14 /* Contains address of top of stack */ |
56eec3c7 | 117 | #undef FP_REGNUM |
5076de82 | 118 | #define FP_REGNUM 15 /* Contains address of executing stack frame */ |
56eec3c7 | 119 | #undef PC_REGNUM |
5076de82 | 120 | #define PC_REGNUM 16 /* Contains program counter */ |
56eec3c7 | 121 | #undef PS_REGNUM |
5076de82 FF |
122 | #define PS_REGNUM 17 /* Contains processor status */ |
123 | ||
56eec3c7 JK |
124 | #ifndef _SEQUENT_ |
125 | /* dynix, not ptx. For ptx, see register_addr in symm-tdep.c */ | |
126 | ||
127 | /* The magic numbers below are offsets into u_ar0 in the user struct. | |
128 | * They live in <machine/reg.h>. Gdb calls this macro with blockend | |
129 | * holding u.u_ar0 - KERNEL_U_ADDR. Only the registers listed are | |
130 | * saved in the u area (along with a few others that aren't useful | |
131 | * here. See <machine/reg.h>). | |
132 | */ | |
133 | ||
134 | #define REGISTER_U_ADDR(addr, blockend, regno) \ | |
135 | { struct user foo; /* needed for finding fpu regs */ \ | |
136 | switch (regno) { \ | |
137 | case 0: \ | |
138 | addr = blockend + EAX * sizeof(int); break; \ | |
139 | case 1: \ | |
140 | addr = blockend + EDX * sizeof(int); break; \ | |
141 | case 2: \ | |
142 | addr = blockend + ECX * sizeof(int); break; \ | |
143 | case 3: /* st(0) */ \ | |
144 | addr = blockend - \ | |
145 | ((int)&foo.u_fpusave.fpu_stack[0][0] - (int)&foo); \ | |
146 | break; \ | |
147 | case 4: /* st(1) */ \ | |
148 | addr = blockend - \ | |
149 | ((int) &foo.u_fpusave.fpu_stack[1][0] - (int)&foo); \ | |
150 | break; \ | |
151 | case 5: \ | |
152 | addr = blockend + EBX * sizeof(int); break; \ | |
153 | case 6: \ | |
154 | addr = blockend + ESI * sizeof(int); break; \ | |
155 | case 7: \ | |
156 | addr = blockend + EDI * sizeof(int); break; \ | |
157 | case 8: /* st(2) */ \ | |
158 | addr = blockend - \ | |
159 | ((int) &foo.u_fpusave.fpu_stack[2][0] - (int)&foo); \ | |
160 | break; \ | |
161 | case 9: /* st(3) */ \ | |
162 | addr = blockend - \ | |
163 | ((int) &foo.u_fpusave.fpu_stack[3][0] - (int)&foo); \ | |
164 | break; \ | |
165 | case 10: /* st(4) */ \ | |
166 | addr = blockend - \ | |
167 | ((int) &foo.u_fpusave.fpu_stack[4][0] - (int)&foo); \ | |
168 | break; \ | |
169 | case 11: /* st(5) */ \ | |
170 | addr = blockend - \ | |
171 | ((int) &foo.u_fpusave.fpu_stack[5][0] - (int)&foo); \ | |
172 | break; \ | |
173 | case 12: /* st(6) */ \ | |
174 | addr = blockend - \ | |
175 | ((int) &foo.u_fpusave.fpu_stack[6][0] - (int)&foo); \ | |
176 | break; \ | |
177 | case 13: /* st(7) */ \ | |
178 | addr = blockend - \ | |
179 | ((int) &foo.u_fpusave.fpu_stack[7][0] - (int)&foo); \ | |
180 | break; \ | |
181 | case 14: \ | |
182 | addr = blockend + ESP * sizeof(int); break; \ | |
183 | case 15: \ | |
184 | addr = blockend + EBP * sizeof(int); break; \ | |
185 | case 16: \ | |
186 | addr = blockend + EIP * sizeof(int); break; \ | |
187 | case 17: \ | |
188 | addr = blockend + FLAGS * sizeof(int); break; \ | |
189 | case 18: /* fp1 */ \ | |
190 | case 19: /* fp2 */ \ | |
191 | case 20: /* fp3 */ \ | |
192 | case 21: /* fp4 */ \ | |
193 | case 22: /* fp5 */ \ | |
194 | case 23: /* fp6 */ \ | |
195 | case 24: /* fp7 */ \ | |
196 | case 25: /* fp8 */ \ | |
197 | case 26: /* fp9 */ \ | |
198 | case 27: /* fp10 */ \ | |
199 | case 28: /* fp11 */ \ | |
200 | case 29: /* fp12 */ \ | |
201 | case 30: /* fp13 */ \ | |
202 | case 31: /* fp14 */ \ | |
203 | case 32: /* fp15 */ \ | |
204 | case 33: /* fp16 */ \ | |
205 | case 34: /* fp17 */ \ | |
206 | case 35: /* fp18 */ \ | |
207 | case 36: /* fp19 */ \ | |
208 | case 37: /* fp20 */ \ | |
209 | case 38: /* fp21 */ \ | |
210 | case 39: /* fp22 */ \ | |
211 | case 40: /* fp23 */ \ | |
212 | case 41: /* fp24 */ \ | |
213 | case 42: /* fp25 */ \ | |
214 | case 43: /* fp26 */ \ | |
215 | case 44: /* fp27 */ \ | |
216 | case 45: /* fp28 */ \ | |
217 | case 46: /* fp29 */ \ | |
218 | case 47: /* fp30 */ \ | |
219 | case 48: /* fp31 */ \ | |
220 | addr = blockend - \ | |
221 | ((int) &foo.u_fpasave.fpa_regs[(regno)-18] - (int)&foo); \ | |
222 | } \ | |
223 | } | |
224 | #endif /* _SEQUENT_ */ | |
225 | \f | |
5076de82 FF |
226 | /* Total amount of space needed to store our copies of the machine's |
227 | register state, the array `registers'. */ | |
228 | /* 10 i386 registers, 8 i387 registers, and 31 Weitek 1167 registers */ | |
56eec3c7 | 229 | #undef REGISTER_BYTES |
5076de82 FF |
230 | #define REGISTER_BYTES ((10 * 4) + (8 * 10) + (31 * 4)) |
231 | ||
232 | /* Index within `registers' of the first byte of the space for | |
233 | register N. */ | |
234 | ||
56eec3c7 | 235 | #undef REGISTER_BYTE |
5076de82 FF |
236 | #define REGISTER_BYTE(N) \ |
237 | ((N < 3) ? (N * 4) : \ | |
238 | (N < 5) ? (((N - 2) * 10) + 2) : \ | |
239 | (N < 8) ? (((N - 5) * 4) + 32) : \ | |
240 | (N < 14) ? (((N - 8) * 10) + 44) : \ | |
241 | (((N - 14) * 4) + 104)) | |
242 | ||
243 | /* Number of bytes of storage in the actual machine representation | |
244 | * for register N. All registers are 4 bytes, except 387 st(0) - st(7), | |
245 | * which are 80 bits each. | |
246 | */ | |
247 | ||
56eec3c7 | 248 | #undef REGISTER_RAW_SIZE |
5076de82 FF |
249 | #define REGISTER_RAW_SIZE(N) \ |
250 | ((N < 3) ? 4 : \ | |
251 | (N < 5) ? 10 : \ | |
252 | (N < 8) ? 4 : \ | |
253 | (N < 14) ? 10 : \ | |
254 | 4) | |
255 | ||
5076de82 FF |
256 | /* Largest value REGISTER_RAW_SIZE can have. */ |
257 | ||
56eec3c7 | 258 | #undef MAX_REGISTER_RAW_SIZE |
5076de82 FF |
259 | #define MAX_REGISTER_RAW_SIZE 10 |
260 | ||
5076de82 FF |
261 | /* Nonzero if register N requires conversion |
262 | from raw format to virtual format. */ | |
263 | ||
56eec3c7 | 264 | #undef REGISTER_CONVERTIBLE |
5076de82 FF |
265 | #define REGISTER_CONVERTIBLE(N) \ |
266 | ((N < 3) ? 0 : \ | |
267 | (N < 5) ? 1 : \ | |
268 | (N < 8) ? 0 : \ | |
269 | (N < 14) ? 1 : \ | |
270 | 0) | |
271 | ||
ad09cb2b PS |
272 | /* Convert data from raw format for register REGNUM in buffer FROM |
273 | to virtual format with type TYPE in buffer TO. */ | |
5076de82 | 274 | |
56eec3c7 | 275 | #undef REGISTER_CONVERT_TO_VIRTUAL |
ad09cb2b PS |
276 | #define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,TYPE,FROM,TO) \ |
277 | { \ | |
278 | double val; \ | |
279 | i387_to_double ((FROM), (char *)&val); \ | |
280 | store_floating ((TO), TYPE_LENGTH (TYPE), val); \ | |
281 | } | |
5076de82 FF |
282 | extern void |
283 | i387_to_double PARAMS ((char *, char *)); | |
284 | ||
ad09cb2b PS |
285 | /* Convert data from virtual format with type TYPE in buffer FROM |
286 | to raw format for register REGNUM in buffer TO. */ | |
5076de82 | 287 | |
56eec3c7 | 288 | #undef REGISTER_CONVERT_TO_RAW |
ad09cb2b PS |
289 | #define REGISTER_CONVERT_TO_RAW(TYPE,REGNUM,FROM,TO) \ |
290 | { \ | |
291 | double val = extract_floating ((FROM), TYPE_LENGTH (TYPE)); \ | |
57a9fee3 | 292 | double_to_i387((char *)&val, (TO))) \ |
ad09cb2b | 293 | } |
5076de82 FF |
294 | extern void |
295 | double_to_i387 PARAMS ((char *, char *)); | |
296 | ||
297 | /* Return the GDB type object for the "standard" data type | |
298 | of data in register N. */ | |
299 | ||
56eec3c7 | 300 | #undef REGISTER_VIRTUAL_TYPE |
5076de82 FF |
301 | #define REGISTER_VIRTUAL_TYPE(N) \ |
302 | ((N < 3) ? builtin_type_int : \ | |
303 | (N < 5) ? builtin_type_double : \ | |
304 | (N < 8) ? builtin_type_int : \ | |
305 | (N < 14) ? builtin_type_double : \ | |
306 | builtin_type_int) | |
307 | ||
56eec3c7 | 308 | /* from m-i386.h (now known as tm-i386v.h). */ |
5076de82 | 309 | /* Store the address of the place in which to copy the structure the |
56eec3c7 JK |
310 | subroutine will return. This is called from call_function. FIXME: |
311 | Why is it writing register 0? Is the symmetry different from tm-i386v.h, | |
312 | or is it some sort of artifact? FIXME. */ | |
5076de82 | 313 | |
56eec3c7 | 314 | #undef STORE_STRUCT_RETURN |
5076de82 FF |
315 | #define STORE_STRUCT_RETURN(ADDR, SP) \ |
316 | { (SP) -= sizeof (ADDR); \ | |
317 | write_memory ((SP), &(ADDR), sizeof (ADDR)); \ | |
318 | write_register(0, (ADDR)); } | |
319 | ||
320 | /* Extract from an array REGBUF containing the (raw) register state | |
321 | a function return value of type TYPE, and copy that, in virtual format, | |
322 | into VALBUF. */ | |
323 | ||
56eec3c7 | 324 | #undef EXTRACT_RETURN_VALUE |
5076de82 FF |
325 | #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ |
326 | symmetry_extract_return_value(TYPE, REGBUF, VALBUF) | |
327 | ||
5076de82 | 328 | \f |
56eec3c7 JK |
329 | /* Things needed for making the inferior call functions. FIXME: Merge |
330 | this with the main 386 stuff. */ | |
5076de82 FF |
331 | |
332 | #define PUSH_DUMMY_FRAME \ | |
333 | { CORE_ADDR sp = read_register (SP_REGNUM); \ | |
334 | int regnum; \ | |
335 | sp = push_word (sp, read_register (PC_REGNUM)); \ | |
336 | sp = push_word (sp, read_register (FP_REGNUM)); \ | |
337 | write_register (FP_REGNUM, sp); \ | |
338 | for (regnum = 0; regnum < NUM_REGS; regnum++) \ | |
339 | sp = push_word (sp, read_register (regnum)); \ | |
340 | write_register (SP_REGNUM, sp); \ | |
341 | } | |
342 | ||
343 | #define POP_FRAME \ | |
344 | { \ | |
345 | FRAME frame = get_current_frame (); \ | |
346 | CORE_ADDR fp; \ | |
347 | int regnum; \ | |
348 | struct frame_saved_regs fsr; \ | |
349 | struct frame_info *fi; \ | |
350 | fi = get_frame_info (frame); \ | |
351 | fp = fi->frame; \ | |
352 | get_frame_saved_regs (fi, &fsr); \ | |
353 | for (regnum = 0; regnum < NUM_REGS; regnum++) { \ | |
354 | CORE_ADDR adr; \ | |
355 | adr = fsr.regs[regnum]; \ | |
356 | if (adr) \ | |
357 | write_register (regnum, read_memory_integer (adr, 4)); \ | |
358 | } \ | |
359 | write_register (FP_REGNUM, read_memory_integer (fp, 4)); \ | |
360 | write_register (PC_REGNUM, read_memory_integer (fp + 4, 4)); \ | |
361 | write_register (SP_REGNUM, fp + 8); \ | |
362 | flush_cached_frames (); \ | |
363 | set_current_frame ( create_new_frame (read_register (FP_REGNUM), \ | |
364 | read_pc ())); \ | |
365 | } | |
366 | ||
367 | /* from i386-dep.c, worked better than my original... */ | |
368 | /* This sequence of words is the instructions | |
369 | * call (32-bit offset) | |
370 | * int 3 | |
371 | * This is 6 bytes. | |
372 | */ | |
373 | ||
374 | #define CALL_DUMMY { 0x223344e8, 0xcc11 } | |
375 | ||
376 | #define CALL_DUMMY_LENGTH 8 | |
377 | ||
378 | #define CALL_DUMMY_START_OFFSET 0 /* Start execution at beginning of dummy */ | |
379 | ||
380 | /* Insert the specified number of args and function address | |
381 | into a call sequence of the above form stored at DUMMYNAME. */ | |
382 | ||
383 | #define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \ | |
384 | { \ | |
385 | int from, to, delta, loc; \ | |
386 | loc = (int)(read_register (SP_REGNUM) - CALL_DUMMY_LENGTH); \ | |
387 | from = loc + 5; \ | |
388 | to = (int)(fun); \ | |
389 | delta = to - from; \ | |
390 | *(int *)((char *)(dummyname) + 1) = delta; \ | |
391 | } | |
392 | ||
393 | extern void | |
394 | print_387_control_word PARAMS ((unsigned int)); | |
395 | ||
396 | extern void | |
397 | print_387_status_word PARAMS ((unsigned int)); |