Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Print VAX instructions for GDB, the GNU debugger. |
51eb8b08 | 2 | Copyright 1986, 1989, 1991, 1992, 1995, 1996, 1998, 1999, 2000, 2002 |
b6ba6518 | 3 | Free Software Foundation, Inc. |
c906108c | 4 | |
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
7 | This program 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 2 of the License, or | |
10 | (at your option) any later version. | |
c906108c | 11 | |
c5aa993b JM |
12 | This program 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. | |
c906108c | 16 | |
c5aa993b JM |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
21 | |
22 | #include "defs.h" | |
23 | #include "symtab.h" | |
24 | #include "opcode/vax.h" | |
c11c3a98 | 25 | #include "gdbcore.h" |
f267bd6a | 26 | #include "inferior.h" |
a33f7558 | 27 | #include "regcache.h" |
c11c3a98 AC |
28 | #include "frame.h" |
29 | #include "value.h" | |
f267bd6a | 30 | #include "arch-utils.h" |
9bbe19fb | 31 | #include "gdb_string.h" |
f267bd6a JT |
32 | |
33 | #include "vax-tdep.h" | |
34 | ||
35 | static gdbarch_register_name_ftype vax_register_name; | |
36 | static gdbarch_register_byte_ftype vax_register_byte; | |
37 | static gdbarch_register_raw_size_ftype vax_register_raw_size; | |
38 | static gdbarch_register_virtual_size_ftype vax_register_virtual_size; | |
39 | static gdbarch_register_virtual_type_ftype vax_register_virtual_type; | |
40 | ||
41 | static gdbarch_skip_prologue_ftype vax_skip_prologue; | |
42 | static gdbarch_saved_pc_after_call_ftype vax_saved_pc_after_call; | |
43 | static gdbarch_frame_num_args_ftype vax_frame_num_args; | |
44 | static gdbarch_frame_chain_ftype vax_frame_chain; | |
45 | static gdbarch_frame_saved_pc_ftype vax_frame_saved_pc; | |
46 | static gdbarch_frame_args_address_ftype vax_frame_args_address; | |
47 | static gdbarch_frame_locals_address_ftype vax_frame_locals_address; | |
48 | static gdbarch_frame_init_saved_regs_ftype vax_frame_init_saved_regs; | |
f267bd6a JT |
49 | |
50 | static gdbarch_store_struct_return_ftype vax_store_struct_return; | |
26e9b323 | 51 | static gdbarch_deprecated_extract_return_value_ftype vax_extract_return_value; |
26e9b323 | 52 | static gdbarch_deprecated_extract_struct_value_address_ftype |
f267bd6a JT |
53 | vax_extract_struct_value_address; |
54 | ||
55 | static gdbarch_push_dummy_frame_ftype vax_push_dummy_frame; | |
56 | static gdbarch_pop_frame_ftype vax_pop_frame; | |
57 | static gdbarch_fix_call_dummy_ftype vax_fix_call_dummy; | |
c906108c | 58 | |
75bc7ddf AC |
59 | /* Return 1 if P points to an invalid floating point value. |
60 | LEN is the length in bytes -- not relevant on the Vax. */ | |
61 | ||
62 | /* FIXME: cagney/2002-01-19: The macro below was originally defined in | |
63 | tm-vax.h and used in values.c. Two problems. Firstly this is a | |
64 | very non-portable and secondly it is wrong. The VAX should be | |
65 | using floatformat and associated methods to identify and handle | |
66 | invalid floating-point values. Adding to the poor target's woes | |
67 | there is no floatformat_vax_{f,d} and no TARGET_FLOAT_FORMAT | |
68 | et.al.. */ | |
69 | ||
70 | /* FIXME: cagney/2002-01-19: It turns out that the only thing that | |
71 | uses this macro is the vax disassembler code (so how old is this | |
72 | target?). This target should instead be using the opcodes | |
73 | disassembler. That allowing the macro to be eliminated. */ | |
74 | ||
75 | #define INVALID_FLOAT(p, len) ((*(short *) p & 0xff80) == 0x8000) | |
76 | ||
c906108c SS |
77 | /* Vax instructions are never longer than this. */ |
78 | #define MAXLEN 62 | |
79 | ||
80 | /* Number of elements in the opcode table. */ | |
81 | #define NOPCODES (sizeof votstrs / sizeof votstrs[0]) | |
82 | ||
83 | static unsigned char *print_insn_arg (); | |
84 | \f | |
fa88f677 | 85 | static const char * |
51eb8b08 JT |
86 | vax_register_name (int regno) |
87 | { | |
88 | static char *register_names[] = | |
89 | { | |
90 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
91 | "r8", "r9", "r10", "r11", "ap", "fp", "sp", "pc", | |
92 | "ps", | |
93 | }; | |
94 | ||
95 | if (regno < 0) | |
96 | return (NULL); | |
97 | if (regno >= (sizeof(register_names) / sizeof(*register_names))) | |
98 | return (NULL); | |
99 | return (register_names[regno]); | |
100 | } | |
101 | ||
f267bd6a | 102 | static int |
51eb8b08 JT |
103 | vax_register_byte (int regno) |
104 | { | |
105 | return (regno * 4); | |
106 | } | |
107 | ||
f267bd6a | 108 | static int |
51eb8b08 JT |
109 | vax_register_raw_size (int regno) |
110 | { | |
111 | return (4); | |
112 | } | |
113 | ||
f267bd6a | 114 | static int |
51eb8b08 JT |
115 | vax_register_virtual_size (int regno) |
116 | { | |
117 | return (4); | |
118 | } | |
119 | ||
f267bd6a | 120 | static struct type * |
51eb8b08 JT |
121 | vax_register_virtual_type (int regno) |
122 | { | |
123 | return (builtin_type_int); | |
124 | } | |
125 | \f | |
f267bd6a | 126 | static void |
ab62c900 JT |
127 | vax_frame_init_saved_regs (struct frame_info *frame) |
128 | { | |
129 | int regnum, regmask; | |
130 | CORE_ADDR next_addr; | |
131 | ||
132 | if (frame->saved_regs) | |
133 | return; | |
134 | ||
135 | frame_saved_regs_zalloc (frame); | |
136 | ||
137 | regmask = read_memory_integer (frame->frame + 4, 4) >> 16; | |
138 | ||
139 | next_addr = frame->frame + 16; | |
140 | ||
141 | /* regmask's low bit is for register 0, which is the first one | |
142 | what would be pushed. */ | |
1d049c5e | 143 | for (regnum = 0; regnum < VAX_AP_REGNUM; regnum++) |
ab62c900 JT |
144 | { |
145 | if (regmask & (1 << regnum)) | |
146 | frame->saved_regs[regnum] = next_addr += 4; | |
147 | } | |
148 | ||
149 | frame->saved_regs[SP_REGNUM] = next_addr + 4; | |
150 | if (regmask & (1 << FP_REGNUM)) | |
151 | frame->saved_regs[SP_REGNUM] += | |
152 | 4 + (4 * read_memory_integer (next_addr + 4, 4)); | |
153 | ||
154 | frame->saved_regs[PC_REGNUM] = frame->frame + 16; | |
155 | frame->saved_regs[FP_REGNUM] = frame->frame + 12; | |
1d049c5e | 156 | frame->saved_regs[VAX_AP_REGNUM] = frame->frame + 8; |
ab62c900 JT |
157 | frame->saved_regs[PS_REGNUM] = frame->frame + 4; |
158 | } | |
5516aa92 | 159 | |
f407986f AC |
160 | /* Get saved user PC for sigtramp from sigcontext for BSD style sigtramp. */ |
161 | ||
162 | static CORE_ADDR | |
163 | vax_sigtramp_saved_pc (struct frame_info *frame) | |
164 | { | |
165 | CORE_ADDR sigcontext_addr; | |
166 | char *buf; | |
167 | int ptrbytes = TYPE_LENGTH (builtin_type_void_func_ptr); | |
168 | int sigcontext_offs = (2 * TARGET_INT_BIT) / TARGET_CHAR_BIT; | |
169 | ||
170 | buf = alloca (ptrbytes); | |
171 | /* Get sigcontext address, it is the third parameter on the stack. */ | |
172 | if (frame->next) | |
173 | sigcontext_addr = read_memory_typed_address | |
174 | (FRAME_ARGS_ADDRESS (frame->next) + FRAME_ARGS_SKIP + sigcontext_offs, | |
175 | builtin_type_void_data_ptr); | |
176 | else | |
177 | sigcontext_addr = read_memory_typed_address | |
178 | (read_register (SP_REGNUM) + sigcontext_offs, builtin_type_void_data_ptr); | |
179 | ||
180 | /* Don't cause a memory_error when accessing sigcontext in case the stack | |
181 | layout has changed or the stack is corrupt. */ | |
182 | target_read_memory (sigcontext_addr + SIGCONTEXT_PC_OFFSET, buf, ptrbytes); | |
183 | return extract_typed_address (buf, builtin_type_void_func_ptr); | |
184 | } | |
185 | ||
f267bd6a | 186 | static CORE_ADDR |
5516aa92 JT |
187 | vax_frame_saved_pc (struct frame_info *frame) |
188 | { | |
5a203e44 | 189 | if ((get_frame_type (frame) == SIGTRAMP_FRAME)) |
f407986f | 190 | return (vax_sigtramp_saved_pc (frame)); /* XXXJRT */ |
5516aa92 JT |
191 | |
192 | return (read_memory_integer (frame->frame + 16, 4)); | |
193 | } | |
194 | ||
195 | CORE_ADDR | |
196 | vax_frame_args_address_correct (struct frame_info *frame) | |
197 | { | |
198 | /* Cannot find the AP register value directly from the FP value. Must | |
199 | find it saved in the frame called by this one, or in the AP register | |
200 | for the innermost frame. However, there is no way to tell the | |
201 | difference between the innermost frame and a frame for which we | |
202 | just don't know the frame that it called (e.g. "info frame 0x7ffec789"). | |
203 | For the sake of argument, suppose that the stack is somewhat trashed | |
204 | (which is one reason that "info frame" exists). So, return 0 (indicating | |
205 | we don't know the address of the arglist) if we don't know what frame | |
206 | this frame calls. */ | |
207 | if (frame->next) | |
208 | return (read_memory_integer (frame->next->frame + 8, 4)); | |
209 | ||
210 | return (0); | |
211 | } | |
212 | ||
f267bd6a | 213 | static CORE_ADDR |
5516aa92 JT |
214 | vax_frame_args_address (struct frame_info *frame) |
215 | { | |
216 | /* In most of GDB, getting the args address is too important to | |
217 | just say "I don't know". This is sometimes wrong for functions | |
218 | that aren't on top of the stack, but c'est la vie. */ | |
219 | if (frame->next) | |
220 | return (read_memory_integer (frame->next->frame + 8, 4)); | |
221 | ||
1d049c5e | 222 | return (read_register (VAX_AP_REGNUM)); |
5516aa92 JT |
223 | } |
224 | ||
f267bd6a | 225 | static CORE_ADDR |
5516aa92 JT |
226 | vax_frame_locals_address (struct frame_info *frame) |
227 | { | |
228 | return (frame->frame); | |
229 | } | |
230 | ||
f267bd6a | 231 | static int |
5516aa92 JT |
232 | vax_frame_num_args (struct frame_info *fi) |
233 | { | |
234 | return (0xff & read_memory_integer (FRAME_ARGS_ADDRESS (fi), 1)); | |
235 | } | |
52efde73 | 236 | |
f267bd6a | 237 | static CORE_ADDR |
52efde73 JT |
238 | vax_frame_chain (struct frame_info *frame) |
239 | { | |
240 | /* In the case of the VAX, the frame's nominal address is the FP value, | |
241 | and 12 bytes later comes the saved previous FP value as a 4-byte word. */ | |
242 | if (inside_entry_file (frame->pc)) | |
243 | return (0); | |
244 | ||
245 | return (read_memory_integer (frame->frame + 12, 4)); | |
246 | } | |
247 | \f | |
f267bd6a | 248 | static void |
52efde73 JT |
249 | vax_push_dummy_frame (void) |
250 | { | |
251 | CORE_ADDR sp = read_register (SP_REGNUM); | |
252 | int regnum; | |
253 | ||
254 | sp = push_word (sp, 0); /* arglist */ | |
255 | for (regnum = 11; regnum >= 0; regnum--) | |
256 | sp = push_word (sp, read_register (regnum)); | |
257 | sp = push_word (sp, read_register (PC_REGNUM)); | |
258 | sp = push_word (sp, read_register (FP_REGNUM)); | |
1d049c5e | 259 | sp = push_word (sp, read_register (VAX_AP_REGNUM)); |
52efde73 JT |
260 | sp = push_word (sp, (read_register (PS_REGNUM) & 0xffef) + 0x2fff0000); |
261 | sp = push_word (sp, 0); | |
262 | write_register (SP_REGNUM, sp); | |
263 | write_register (FP_REGNUM, sp); | |
1d049c5e | 264 | write_register (VAX_AP_REGNUM, sp + (17 * 4)); |
52efde73 JT |
265 | } |
266 | ||
f267bd6a | 267 | static void |
52efde73 JT |
268 | vax_pop_frame (void) |
269 | { | |
270 | CORE_ADDR fp = read_register (FP_REGNUM); | |
271 | int regnum; | |
272 | int regmask = read_memory_integer (fp + 4, 4); | |
273 | ||
274 | write_register (PS_REGNUM, | |
275 | (regmask & 0xffff) | |
276 | | (read_register (PS_REGNUM) & 0xffff0000)); | |
277 | write_register (PC_REGNUM, read_memory_integer (fp + 16, 4)); | |
278 | write_register (FP_REGNUM, read_memory_integer (fp + 12, 4)); | |
1d049c5e | 279 | write_register (VAX_AP_REGNUM, read_memory_integer (fp + 8, 4)); |
52efde73 JT |
280 | fp += 16; |
281 | for (regnum = 0; regnum < 12; regnum++) | |
282 | if (regmask & (0x10000 << regnum)) | |
283 | write_register (regnum, read_memory_integer (fp += 4, 4)); | |
284 | fp = fp + 4 + ((regmask >> 30) & 3); | |
285 | if (regmask & 0x20000000) | |
286 | { | |
287 | regnum = read_memory_integer (fp, 4); | |
288 | fp += (regnum + 1) * 4; | |
289 | } | |
290 | write_register (SP_REGNUM, fp); | |
291 | flush_cached_frames (); | |
292 | } | |
a33f7558 JT |
293 | |
294 | /* The VAX call dummy sequence: | |
295 | ||
296 | calls #69, @#32323232 | |
297 | bpt | |
298 | ||
299 | It is 8 bytes long. The address and argc are patched by | |
300 | vax_fix_call_dummy(). */ | |
f267bd6a JT |
301 | static LONGEST vax_call_dummy_words[] = { 0x329f69fb, 0x03323232 }; |
302 | static int sizeof_vax_call_dummy_words = sizeof(vax_call_dummy_words); | |
a33f7558 | 303 | |
f267bd6a | 304 | static void |
a33f7558 JT |
305 | vax_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun, int nargs, |
306 | struct value **args, struct type *type, int gcc_p) | |
307 | { | |
308 | dummy[1] = nargs; | |
309 | store_unsigned_integer (dummy + 3, 4, fun); | |
310 | } | |
ab62c900 | 311 | \f |
f267bd6a | 312 | static void |
ea74468c JT |
313 | vax_store_struct_return (CORE_ADDR addr, CORE_ADDR sp) |
314 | { | |
315 | write_register (1, addr); | |
316 | } | |
317 | ||
f267bd6a | 318 | static void |
ea74468c JT |
319 | vax_extract_return_value (struct type *valtype, char *regbuf, char *valbuf) |
320 | { | |
321 | memcpy (valbuf, regbuf + REGISTER_BYTE (0), TYPE_LENGTH (valtype)); | |
322 | } | |
323 | ||
f267bd6a | 324 | static void |
ea74468c JT |
325 | vax_store_return_value (struct type *valtype, char *valbuf) |
326 | { | |
73937e03 | 327 | deprecated_write_register_bytes (0, valbuf, TYPE_LENGTH (valtype)); |
ea74468c JT |
328 | } |
329 | ||
f267bd6a | 330 | static CORE_ADDR |
ea74468c JT |
331 | vax_extract_struct_value_address (char *regbuf) |
332 | { | |
333 | return (extract_address (regbuf + REGISTER_BYTE (0), REGISTER_RAW_SIZE (0))); | |
334 | } | |
335 | \f | |
1d049c5e JT |
336 | static const unsigned char * |
337 | vax_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr) | |
338 | { | |
339 | static const unsigned char vax_breakpoint[] = { 3 }; | |
340 | ||
341 | *lenptr = sizeof(vax_breakpoint); | |
342 | return (vax_breakpoint); | |
343 | } | |
344 | \f | |
b83266a0 SS |
345 | /* Advance PC across any function entry prologue instructions |
346 | to reach some "real" code. */ | |
347 | ||
f267bd6a | 348 | static CORE_ADDR |
fba45db2 | 349 | vax_skip_prologue (CORE_ADDR pc) |
b83266a0 SS |
350 | { |
351 | register int op = (unsigned char) read_memory_integer (pc, 1); | |
352 | if (op == 0x11) | |
c5aa993b | 353 | pc += 2; /* skip brb */ |
b83266a0 | 354 | if (op == 0x31) |
c5aa993b | 355 | pc += 3; /* skip brw */ |
b83266a0 | 356 | if (op == 0xC2 |
c5aa993b JM |
357 | && ((unsigned char) read_memory_integer (pc + 2, 1)) == 0x5E) |
358 | pc += 3; /* skip subl2 */ | |
b83266a0 | 359 | if (op == 0x9E |
c5aa993b JM |
360 | && ((unsigned char) read_memory_integer (pc + 1, 1)) == 0xAE |
361 | && ((unsigned char) read_memory_integer (pc + 3, 1)) == 0x5E) | |
362 | pc += 4; /* skip movab */ | |
b83266a0 | 363 | if (op == 0x9E |
c5aa993b JM |
364 | && ((unsigned char) read_memory_integer (pc + 1, 1)) == 0xCE |
365 | && ((unsigned char) read_memory_integer (pc + 4, 1)) == 0x5E) | |
366 | pc += 5; /* skip movab */ | |
b83266a0 | 367 | if (op == 0x9E |
c5aa993b JM |
368 | && ((unsigned char) read_memory_integer (pc + 1, 1)) == 0xEE |
369 | && ((unsigned char) read_memory_integer (pc + 6, 1)) == 0x5E) | |
370 | pc += 7; /* skip movab */ | |
b83266a0 SS |
371 | return pc; |
372 | } | |
373 | ||
f267bd6a | 374 | static CORE_ADDR |
a33f7558 JT |
375 | vax_saved_pc_after_call (struct frame_info *frame) |
376 | { | |
377 | return (FRAME_SAVED_PC(frame)); | |
378 | } | |
379 | \f | |
c906108c SS |
380 | /* Print the vax instruction at address MEMADDR in debugged memory, |
381 | from disassembler info INFO. | |
382 | Returns length of the instruction, in bytes. */ | |
383 | ||
384 | static int | |
fba45db2 | 385 | vax_print_insn (CORE_ADDR memaddr, disassemble_info *info) |
c906108c SS |
386 | { |
387 | unsigned char buffer[MAXLEN]; | |
388 | register int i; | |
389 | register unsigned char *p; | |
c11c3a98 | 390 | const char *d; |
c906108c SS |
391 | |
392 | int status = (*info->read_memory_func) (memaddr, buffer, MAXLEN, info); | |
393 | if (status != 0) | |
394 | { | |
395 | (*info->memory_error_func) (status, memaddr, info); | |
396 | return -1; | |
397 | } | |
398 | ||
399 | for (i = 0; i < NOPCODES; i++) | |
400 | if (votstrs[i].detail.code == buffer[0] | |
c5aa993b | 401 | || votstrs[i].detail.code == *(unsigned short *) buffer) |
c906108c SS |
402 | break; |
403 | ||
404 | /* Handle undefined instructions. */ | |
405 | if (i == NOPCODES) | |
406 | { | |
407 | (*info->fprintf_func) (info->stream, "0%o", buffer[0]); | |
408 | return 1; | |
409 | } | |
410 | ||
411 | (*info->fprintf_func) (info->stream, "%s", votstrs[i].name); | |
412 | ||
413 | /* Point at first byte of argument data, | |
414 | and at descriptor for first argument. */ | |
415 | p = buffer + 1 + (votstrs[i].detail.code >= 0x100); | |
416 | d = votstrs[i].detail.args; | |
417 | ||
418 | if (*d) | |
419 | (*info->fprintf_func) (info->stream, " "); | |
420 | ||
421 | while (*d) | |
422 | { | |
423 | p = print_insn_arg (d, p, memaddr + (p - buffer), info); | |
424 | d += 2; | |
425 | if (*d) | |
426 | (*info->fprintf_func) (info->stream, ","); | |
427 | } | |
428 | return p - buffer; | |
429 | } | |
f267bd6a | 430 | \f |
c906108c | 431 | static unsigned char * |
fba45db2 KB |
432 | print_insn_arg (char *d, register char *p, CORE_ADDR addr, |
433 | disassemble_info *info) | |
c906108c SS |
434 | { |
435 | register int regnum = *p & 0xf; | |
436 | float floatlitbuf; | |
437 | ||
438 | if (*d == 'b') | |
439 | { | |
440 | if (d[1] == 'b') | |
441 | (*info->fprintf_func) (info->stream, "0x%x", addr + *p++ + 1); | |
442 | else | |
443 | { | |
c5aa993b | 444 | (*info->fprintf_func) (info->stream, "0x%x", addr + *(short *) p + 2); |
c906108c SS |
445 | p += 2; |
446 | } | |
447 | } | |
448 | else | |
449 | switch ((*p++ >> 4) & 0xf) | |
450 | { | |
451 | case 0: | |
452 | case 1: | |
453 | case 2: | |
454 | case 3: /* Literal mode */ | |
455 | if (d[1] == 'd' || d[1] == 'f' || d[1] == 'g' || d[1] == 'h') | |
456 | { | |
c5aa993b | 457 | *(int *) &floatlitbuf = 0x4000 + ((p[-1] & 0x3f) << 4); |
c906108c SS |
458 | (*info->fprintf_func) (info->stream, "$%f", floatlitbuf); |
459 | } | |
460 | else | |
461 | (*info->fprintf_func) (info->stream, "$%d", p[-1] & 0x3f); | |
462 | break; | |
463 | ||
464 | case 4: /* Indexed */ | |
465 | p = (char *) print_insn_arg (d, p, addr + 1, info); | |
466 | (*info->fprintf_func) (info->stream, "[%s]", REGISTER_NAME (regnum)); | |
467 | break; | |
468 | ||
469 | case 5: /* Register */ | |
470 | (*info->fprintf_func) (info->stream, REGISTER_NAME (regnum)); | |
471 | break; | |
472 | ||
473 | case 7: /* Autodecrement */ | |
474 | (*info->fprintf_func) (info->stream, "-"); | |
475 | case 6: /* Register deferred */ | |
476 | (*info->fprintf_func) (info->stream, "(%s)", REGISTER_NAME (regnum)); | |
477 | break; | |
478 | ||
479 | case 9: /* Autoincrement deferred */ | |
480 | (*info->fprintf_func) (info->stream, "@"); | |
481 | if (regnum == PC_REGNUM) | |
482 | { | |
483 | (*info->fprintf_func) (info->stream, "#"); | |
c5aa993b | 484 | info->target = *(long *) p; |
c906108c SS |
485 | (*info->print_address_func) (info->target, info); |
486 | p += 4; | |
487 | break; | |
488 | } | |
489 | case 8: /* Autoincrement */ | |
490 | if (regnum == PC_REGNUM) | |
491 | { | |
492 | (*info->fprintf_func) (info->stream, "#"); | |
493 | switch (d[1]) | |
494 | { | |
495 | case 'b': | |
496 | (*info->fprintf_func) (info->stream, "%d", *p++); | |
497 | break; | |
498 | ||
499 | case 'w': | |
c5aa993b | 500 | (*info->fprintf_func) (info->stream, "%d", *(short *) p); |
c906108c SS |
501 | p += 2; |
502 | break; | |
503 | ||
504 | case 'l': | |
c5aa993b | 505 | (*info->fprintf_func) (info->stream, "%d", *(long *) p); |
c906108c SS |
506 | p += 4; |
507 | break; | |
508 | ||
509 | case 'q': | |
510 | (*info->fprintf_func) (info->stream, "0x%x%08x", | |
c5aa993b | 511 | ((long *) p)[1], ((long *) p)[0]); |
c906108c SS |
512 | p += 8; |
513 | break; | |
514 | ||
515 | case 'o': | |
516 | (*info->fprintf_func) (info->stream, "0x%x%08x%08x%08x", | |
c5aa993b JM |
517 | ((long *) p)[3], ((long *) p)[2], |
518 | ((long *) p)[1], ((long *) p)[0]); | |
c906108c SS |
519 | p += 16; |
520 | break; | |
521 | ||
522 | case 'f': | |
523 | if (INVALID_FLOAT (p, 4)) | |
524 | (*info->fprintf_func) (info->stream, | |
525 | "<<invalid float 0x%x>>", | |
526 | *(int *) p); | |
527 | else | |
528 | (*info->fprintf_func) (info->stream, "%f", *(float *) p); | |
529 | p += 4; | |
530 | break; | |
531 | ||
532 | case 'd': | |
533 | if (INVALID_FLOAT (p, 8)) | |
534 | (*info->fprintf_func) (info->stream, | |
535 | "<<invalid float 0x%x%08x>>", | |
c5aa993b | 536 | ((long *) p)[1], ((long *) p)[0]); |
c906108c SS |
537 | else |
538 | (*info->fprintf_func) (info->stream, "%f", *(double *) p); | |
539 | p += 8; | |
540 | break; | |
541 | ||
542 | case 'g': | |
543 | (*info->fprintf_func) (info->stream, "g-float"); | |
544 | p += 8; | |
545 | break; | |
546 | ||
547 | case 'h': | |
548 | (*info->fprintf_func) (info->stream, "h-float"); | |
549 | p += 16; | |
550 | break; | |
551 | ||
552 | } | |
553 | } | |
554 | else | |
555 | (*info->fprintf_func) (info->stream, "(%s)+", REGISTER_NAME (regnum)); | |
556 | break; | |
557 | ||
558 | case 11: /* Byte displacement deferred */ | |
559 | (*info->fprintf_func) (info->stream, "@"); | |
560 | case 10: /* Byte displacement */ | |
561 | if (regnum == PC_REGNUM) | |
562 | { | |
563 | info->target = addr + *p + 2; | |
564 | (*info->print_address_func) (info->target, info); | |
565 | } | |
566 | else | |
567 | (*info->fprintf_func) (info->stream, "%d(%s)", *p, REGISTER_NAME (regnum)); | |
568 | p += 1; | |
569 | break; | |
570 | ||
571 | case 13: /* Word displacement deferred */ | |
572 | (*info->fprintf_func) (info->stream, "@"); | |
573 | case 12: /* Word displacement */ | |
574 | if (regnum == PC_REGNUM) | |
575 | { | |
c5aa993b | 576 | info->target = addr + *(short *) p + 3; |
c906108c SS |
577 | (*info->print_address_func) (info->target, info); |
578 | } | |
579 | else | |
580 | (*info->fprintf_func) (info->stream, "%d(%s)", | |
c5aa993b | 581 | *(short *) p, REGISTER_NAME (regnum)); |
c906108c SS |
582 | p += 2; |
583 | break; | |
584 | ||
585 | case 15: /* Long displacement deferred */ | |
586 | (*info->fprintf_func) (info->stream, "@"); | |
587 | case 14: /* Long displacement */ | |
588 | if (regnum == PC_REGNUM) | |
589 | { | |
c5aa993b | 590 | info->target = addr + *(short *) p + 5; |
c906108c SS |
591 | (*info->print_address_func) (info->target, info); |
592 | } | |
593 | else | |
594 | (*info->fprintf_func) (info->stream, "%d(%s)", | |
c5aa993b | 595 | *(long *) p, REGISTER_NAME (regnum)); |
c906108c SS |
596 | p += 4; |
597 | } | |
598 | ||
599 | return (unsigned char *) p; | |
600 | } | |
f267bd6a JT |
601 | \f |
602 | /* Initialize the current architecture based on INFO. If possible, re-use an | |
603 | architecture from ARCHES, which is a list of architectures already created | |
604 | during this debugging session. | |
605 | ||
606 | Called e.g. at program startup, when reading a core file, and when reading | |
607 | a binary file. */ | |
608 | ||
609 | static struct gdbarch * | |
610 | vax_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) | |
611 | { | |
4791e091 | 612 | struct gdbarch_tdep *tdep; |
f267bd6a | 613 | struct gdbarch *gdbarch; |
4791e091 | 614 | enum gdb_osabi osabi = GDB_OSABI_UNKNOWN; |
f267bd6a | 615 | |
4791e091 | 616 | /* Try to determine the ABI of the object we are loading. */ |
f267bd6a | 617 | |
4791e091 JT |
618 | if (info.abfd != NULL) |
619 | osabi = gdbarch_lookup_osabi (info.abfd); | |
620 | ||
621 | /* Find a candidate among extant architectures. */ | |
622 | for (arches = gdbarch_list_lookup_by_info (arches, &info); | |
623 | arches != NULL; | |
624 | arches = gdbarch_list_lookup_by_info (arches->next, &info)) | |
625 | { | |
626 | /* Make sure the ABI selection matches. */ | |
627 | tdep = gdbarch_tdep (arches->gdbarch); | |
628 | if (tdep && tdep->osabi == osabi) | |
629 | return arches->gdbarch; | |
630 | } | |
631 | ||
632 | tdep = xmalloc (sizeof (struct gdbarch_tdep)); | |
633 | gdbarch = gdbarch_alloc (&info, tdep); | |
634 | ||
635 | tdep->osabi = osabi; | |
f267bd6a JT |
636 | |
637 | /* Register info */ | |
638 | set_gdbarch_num_regs (gdbarch, VAX_NUM_REGS); | |
639 | set_gdbarch_sp_regnum (gdbarch, VAX_SP_REGNUM); | |
640 | set_gdbarch_fp_regnum (gdbarch, VAX_FP_REGNUM); | |
641 | set_gdbarch_pc_regnum (gdbarch, VAX_PC_REGNUM); | |
642 | set_gdbarch_ps_regnum (gdbarch, VAX_PS_REGNUM); | |
643 | ||
644 | set_gdbarch_register_name (gdbarch, vax_register_name); | |
645 | set_gdbarch_register_size (gdbarch, VAX_REGISTER_SIZE); | |
646 | set_gdbarch_register_bytes (gdbarch, VAX_REGISTER_BYTES); | |
647 | set_gdbarch_register_byte (gdbarch, vax_register_byte); | |
648 | set_gdbarch_register_raw_size (gdbarch, vax_register_raw_size); | |
649 | set_gdbarch_max_register_raw_size (gdbarch, VAX_MAX_REGISTER_RAW_SIZE); | |
650 | set_gdbarch_register_virtual_size (gdbarch, vax_register_virtual_size); | |
651 | set_gdbarch_max_register_virtual_size (gdbarch, | |
652 | VAX_MAX_REGISTER_VIRTUAL_SIZE); | |
653 | set_gdbarch_register_virtual_type (gdbarch, vax_register_virtual_type); | |
654 | ||
655 | /* Frame and stack info */ | |
656 | set_gdbarch_skip_prologue (gdbarch, vax_skip_prologue); | |
657 | set_gdbarch_saved_pc_after_call (gdbarch, vax_saved_pc_after_call); | |
658 | ||
659 | set_gdbarch_frame_num_args (gdbarch, vax_frame_num_args); | |
660 | set_gdbarch_frameless_function_invocation (gdbarch, | |
661 | generic_frameless_function_invocation_not); | |
662 | ||
663 | set_gdbarch_frame_chain (gdbarch, vax_frame_chain); | |
664 | set_gdbarch_frame_chain_valid (gdbarch, func_frame_chain_valid); | |
665 | set_gdbarch_frame_saved_pc (gdbarch, vax_frame_saved_pc); | |
666 | ||
667 | set_gdbarch_frame_args_address (gdbarch, vax_frame_args_address); | |
668 | set_gdbarch_frame_locals_address (gdbarch, vax_frame_locals_address); | |
669 | ||
670 | set_gdbarch_frame_init_saved_regs (gdbarch, vax_frame_init_saved_regs); | |
671 | ||
672 | set_gdbarch_frame_args_skip (gdbarch, 4); | |
673 | ||
f267bd6a JT |
674 | set_gdbarch_inner_than (gdbarch, core_addr_lessthan); |
675 | ||
676 | /* Return value info */ | |
677 | set_gdbarch_store_struct_return (gdbarch, vax_store_struct_return); | |
26e9b323 | 678 | set_gdbarch_deprecated_extract_return_value (gdbarch, vax_extract_return_value); |
ebba8386 | 679 | set_gdbarch_deprecated_store_return_value (gdbarch, vax_store_return_value); |
26e9b323 | 680 | set_gdbarch_deprecated_extract_struct_value_address (gdbarch, vax_extract_struct_value_address); |
f267bd6a JT |
681 | |
682 | /* Call dummy info */ | |
683 | set_gdbarch_push_dummy_frame (gdbarch, vax_push_dummy_frame); | |
684 | set_gdbarch_pop_frame (gdbarch, vax_pop_frame); | |
685 | set_gdbarch_call_dummy_location (gdbarch, ON_STACK); | |
686 | set_gdbarch_call_dummy_p (gdbarch, 1); | |
687 | set_gdbarch_call_dummy_words (gdbarch, vax_call_dummy_words); | |
688 | set_gdbarch_sizeof_call_dummy_words (gdbarch, sizeof_vax_call_dummy_words); | |
689 | set_gdbarch_fix_call_dummy (gdbarch, vax_fix_call_dummy); | |
690 | set_gdbarch_call_dummy_start_offset (gdbarch, 0); | |
691 | set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1); | |
692 | set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 7); | |
07555a72 | 693 | set_gdbarch_deprecated_use_generic_dummy_frames (gdbarch, 0); |
ae45cd16 | 694 | set_gdbarch_deprecated_pc_in_call_dummy (gdbarch, deprecated_pc_in_call_dummy_on_stack); |
f267bd6a JT |
695 | set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0); |
696 | ||
697 | /* Breakpoint info */ | |
1d049c5e | 698 | set_gdbarch_breakpoint_from_pc (gdbarch, vax_breakpoint_from_pc); |
f267bd6a JT |
699 | set_gdbarch_decr_pc_after_break (gdbarch, 0); |
700 | ||
701 | /* Misc info */ | |
702 | set_gdbarch_function_start_offset (gdbarch, 2); | |
1d049c5e | 703 | set_gdbarch_believe_pcc_promotion (gdbarch, 1); |
f267bd6a | 704 | |
4791e091 JT |
705 | /* Hook in ABI-specific overrides, if they have been registered. */ |
706 | gdbarch_init_osabi (info, gdbarch, osabi); | |
707 | ||
f267bd6a JT |
708 | return (gdbarch); |
709 | } | |
c906108c | 710 | |
4791e091 JT |
711 | static void |
712 | vax_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file) | |
713 | { | |
714 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); | |
715 | ||
716 | if (tdep == NULL) | |
717 | return; | |
718 | ||
719 | fprintf_unfiltered (file, "vax_dump_tdep: OS ABI = %s\n", | |
720 | gdbarch_osabi_name (tdep->osabi)); | |
721 | } | |
722 | ||
c906108c | 723 | void |
fba45db2 | 724 | _initialize_vax_tdep (void) |
c906108c | 725 | { |
4791e091 | 726 | gdbarch_register (bfd_arch_vax, vax_gdbarch_init, vax_dump_tdep); |
f267bd6a | 727 | |
c906108c SS |
728 | tm_print_insn = vax_print_insn; |
729 | } |