Commit | Line | Data |
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c906108c | 1 | /* Target dependent code for the Motorola 68000 series. |
b6ba6518 | 2 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1999, 2000, 2001 |
a1de33a8 | 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 "frame.h" | |
24 | #include "symtab.h" | |
25 | #include "gdbcore.h" | |
26 | #include "value.h" | |
27 | #include "gdb_string.h" | |
7a292a7a | 28 | #include "inferior.h" |
4e052eda | 29 | #include "regcache.h" |
5d3ed2e3 | 30 | #include "arch-utils.h" |
c906108c | 31 | \f |
c5aa993b | 32 | |
89c3b6d3 PDM |
33 | #define P_LINKL_FP 0x480e |
34 | #define P_LINKW_FP 0x4e56 | |
35 | #define P_PEA_FP 0x4856 | |
36 | #define P_MOVL_SP_FP 0x2c4f | |
37 | #define P_MOVL 0x207c | |
38 | #define P_JSR 0x4eb9 | |
39 | #define P_BSR 0x61ff | |
40 | #define P_LEAL 0x43fb | |
41 | #define P_MOVML 0x48ef | |
42 | #define P_FMOVM 0xf237 | |
43 | #define P_TRAP 0x4e40 | |
44 | ||
6300c360 GS |
45 | enum |
46 | { | |
47 | E_FP_REGNUM = 14, /* Contains address of executing stack frame */ | |
48 | E_SP_REGNUM = 15, /* Contains address of top of stack */ | |
49 | E_PS_REGNUM = 16, /* Contains processor status */ | |
50 | E_PC_REGNUM = 17, /* Contains program counter */ | |
51 | E_FP0_REGNUM = 18 /* Floating point register 0 */ | |
52 | }; | |
53 | ||
7f8e7424 GS |
54 | void m68k_frame_init_saved_regs (struct frame_info *frame_info); |
55 | ||
942dc0e9 GS |
56 | static int |
57 | m68k_register_bytes_ok (numbytes) | |
58 | { | |
59 | return ((numbytes == REGISTER_BYTES_FP) | |
60 | || (numbytes == REGISTER_BYTES_NOFP)); | |
61 | } | |
62 | ||
5d3ed2e3 GS |
63 | /* Number of bytes of storage in the actual machine representation |
64 | for register regnum. On the 68000, all regs are 4 bytes | |
65 | except the floating point regs which are 12 bytes. */ | |
66 | /* Note that the unsigned cast here forces the result of the | |
67 | subtraction to very high positive values if regnum < FP0_REGNUM */ | |
68 | ||
69 | static int | |
70 | m68k_register_raw_size (int regnum) | |
71 | { | |
72 | return (((unsigned) (regnum) - FP0_REGNUM) < 8 ? 12 : 4); | |
73 | } | |
74 | ||
75 | /* Number of bytes of storage in the program's representation | |
76 | for register regnum. On the 68000, all regs are 4 bytes | |
77 | except the floating point regs which are 12-byte long doubles. */ | |
78 | ||
79 | static int | |
80 | m68k_register_virtual_size (int regnum) | |
81 | { | |
82 | return (((unsigned) (regnum) - FP0_REGNUM) < 8 ? 12 : 4); | |
83 | } | |
84 | ||
85 | /* Return the GDB type object for the "standard" data type of data | |
86 | in register N. This should be int for D0-D7, long double for FP0-FP7, | |
87 | and void pointer for all others (A0-A7, PC, SR, FPCONTROL etc). | |
88 | Note, for registers which contain addresses return pointer to void, | |
89 | not pointer to char, because we don't want to attempt to print | |
90 | the string after printing the address. */ | |
91 | ||
92 | static struct type * | |
93 | m68k_register_virtual_type (int regnum) | |
94 | { | |
95 | if ((unsigned) regnum >= FPC_REGNUM) | |
96 | return lookup_pointer_type (builtin_type_void); | |
97 | else if ((unsigned) regnum >= FP0_REGNUM) | |
98 | return builtin_type_long_double; | |
99 | else if ((unsigned) regnum >= A0_REGNUM) | |
100 | return lookup_pointer_type (builtin_type_void); | |
101 | else | |
102 | return builtin_type_int; | |
103 | } | |
104 | ||
105 | /* Function: m68k_register_name | |
106 | Returns the name of the standard m68k register regnum. */ | |
107 | ||
108 | static const char * | |
109 | m68k_register_name (int regnum) | |
110 | { | |
111 | static char *register_names[] = { | |
112 | "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7", | |
113 | "a0", "a1", "a2", "a3", "a4", "a5", "fp", "sp", | |
114 | "ps", "pc", | |
115 | "fp0", "fp1", "fp2", "fp3", "fp4", "fp5", "fp6", "fp7", | |
116 | "fpcontrol", "fpstatus", "fpiaddr", "fpcode", "fpflags" | |
117 | }; | |
118 | ||
119 | if (regnum < 0 || | |
120 | regnum >= sizeof (register_names) / sizeof (register_names[0])) | |
121 | internal_error (__FILE__, __LINE__, | |
122 | "m68k_register_name: illegal register number %d", regnum); | |
123 | else | |
124 | return register_names[regnum]; | |
125 | } | |
126 | ||
127 | /* Stack must be kept short aligned when doing function calls. */ | |
128 | ||
129 | static CORE_ADDR | |
130 | m68k_stack_align (CORE_ADDR addr) | |
131 | { | |
132 | return ((addr + 1) & ~1); | |
133 | } | |
134 | ||
135 | /* Index within `registers' of the first byte of the space for | |
136 | register regnum. */ | |
137 | ||
138 | static int | |
139 | m68k_register_byte (int regnum) | |
140 | { | |
141 | if (regnum >= FPC_REGNUM) | |
142 | return (((regnum - FPC_REGNUM) * 4) + 168); | |
143 | else if (regnum >= FP0_REGNUM) | |
144 | return (((regnum - FP0_REGNUM) * 12) + 72); | |
145 | else | |
146 | return (regnum * 4); | |
147 | } | |
148 | ||
942dc0e9 GS |
149 | /* Store the address of the place in which to copy the structure the |
150 | subroutine will return. This is called from call_function. */ | |
151 | ||
152 | static void | |
153 | m68k_store_struct_return (CORE_ADDR addr, CORE_ADDR sp) | |
154 | { | |
155 | write_register (A1_REGNUM, addr); | |
156 | } | |
157 | ||
158 | /* Extract from an array regbuf containing the (raw) register state | |
159 | a function return value of type type, and copy that, in virtual format, | |
160 | into valbuf. This is assuming that floating point values are returned | |
161 | as doubles in d0/d1. */ | |
162 | ||
163 | static void | |
164 | m68k_deprecated_extract_return_value (struct type *type, char *regbuf, | |
165 | char *valbuf) | |
166 | { | |
167 | int offset = 0; | |
168 | int typeLength = TYPE_LENGTH (type); | |
169 | ||
170 | if (typeLength < 4) | |
171 | offset = 4 - typeLength; | |
172 | ||
173 | memcpy (valbuf, regbuf + offset, typeLength); | |
174 | } | |
175 | ||
176 | static CORE_ADDR | |
177 | m68k_deprecated_extract_struct_value_address (char *regbuf) | |
178 | { | |
179 | return (*(CORE_ADDR *) (regbuf)); | |
180 | } | |
181 | ||
182 | /* Write into appropriate registers a function return value | |
183 | of type TYPE, given in virtual format. Assumes floats are passed | |
184 | in d0/d1. */ | |
185 | ||
186 | static void | |
187 | m68k_store_return_value (struct type *type, char *valbuf) | |
188 | { | |
189 | write_register_bytes (0, valbuf, TYPE_LENGTH (type)); | |
190 | } | |
191 | ||
192 | /* Describe the pointer in each stack frame to the previous stack frame | |
193 | (its caller). */ | |
194 | ||
195 | /* FRAME_CHAIN takes a frame's nominal address and produces the frame's | |
196 | chain-pointer. | |
197 | In the case of the 68000, the frame's nominal address | |
198 | is the address of a 4-byte word containing the calling frame's address. */ | |
199 | ||
200 | /* If we are chaining from sigtramp, then manufacture a sigtramp frame | |
201 | (which isn't really on the stack. I'm not sure this is right for anything | |
202 | but BSD4.3 on an hp300. */ | |
203 | ||
204 | static CORE_ADDR | |
205 | m68k_frame_chain (struct frame_info *thisframe) | |
206 | { | |
207 | if (thisframe->signal_handler_caller) | |
208 | return thisframe->frame; | |
209 | else if (!inside_entry_file ((thisframe)->pc)) | |
210 | return read_memory_integer ((thisframe)->frame, 4); | |
211 | else | |
212 | return 0; | |
213 | } | |
214 | ||
215 | /* A function that tells us whether the function invocation represented | |
216 | by fi does not have a frame on the stack associated with it. If it | |
217 | does not, FRAMELESS is set to 1, else 0. */ | |
218 | ||
219 | static int | |
220 | m68k_frameless_function_invocation (struct frame_info *fi) | |
221 | { | |
222 | if (fi->signal_handler_caller) | |
223 | return 0; | |
224 | else | |
225 | return frameless_look_for_prologue (fi); | |
226 | } | |
227 | ||
228 | static CORE_ADDR | |
229 | m68k_frame_saved_pc (struct frame_info *frame) | |
230 | { | |
231 | if (frame->signal_handler_caller) | |
232 | { | |
233 | if (frame->next) | |
234 | return read_memory_integer (frame->next->frame + SIG_PC_FP_OFFSET, 4); | |
235 | else | |
236 | return read_memory_integer (read_register (SP_REGNUM) | |
237 | + SIG_PC_FP_OFFSET - 8, 4); | |
238 | } | |
239 | else | |
240 | return read_memory_integer (frame->frame + 4, 4); | |
241 | } | |
242 | ||
243 | ||
b83266a0 SS |
244 | /* The only reason this is here is the tm-altos.h reference below. It |
245 | was moved back here from tm-m68k.h. FIXME? */ | |
246 | ||
247 | extern CORE_ADDR | |
fba45db2 | 248 | altos_skip_prologue (CORE_ADDR pc) |
b83266a0 SS |
249 | { |
250 | register int op = read_memory_integer (pc, 2); | |
89c3b6d3 | 251 | if (op == P_LINKW_FP) |
c5aa993b | 252 | pc += 4; /* Skip link #word */ |
89c3b6d3 | 253 | else if (op == P_LINKL_FP) |
c5aa993b | 254 | pc += 6; /* Skip link #long */ |
b83266a0 | 255 | /* Not sure why branches are here. */ |
514e603d | 256 | /* From tm-altos.h */ |
b83266a0 | 257 | else if (op == 0060000) |
c5aa993b | 258 | pc += 4; /* Skip bra #word */ |
b83266a0 | 259 | else if (op == 00600377) |
c5aa993b | 260 | pc += 6; /* skip bra #long */ |
b83266a0 | 261 | else if ((op & 0177400) == 0060000) |
c5aa993b | 262 | pc += 2; /* skip bra #char */ |
b83266a0 SS |
263 | return pc; |
264 | } | |
265 | ||
89c3b6d3 | 266 | int |
fba45db2 | 267 | delta68_in_sigtramp (CORE_ADDR pc, char *name) |
89c3b6d3 | 268 | { |
1bd54964 AC |
269 | if (name != NULL) |
270 | return strcmp (name, "_sigcode") == 0; | |
271 | else | |
272 | return 0; | |
89c3b6d3 PDM |
273 | } |
274 | ||
275 | CORE_ADDR | |
fba45db2 | 276 | delta68_frame_args_address (struct frame_info *frame_info) |
89c3b6d3 PDM |
277 | { |
278 | /* we assume here that the only frameless functions are the system calls | |
279 | or other functions who do not put anything on the stack. */ | |
280 | if (frame_info->signal_handler_caller) | |
281 | return frame_info->frame + 12; | |
282 | else if (frameless_look_for_prologue (frame_info)) | |
283 | { | |
b5d78d39 GS |
284 | /* Check for an interrupted system call */ |
285 | if (frame_info->next && frame_info->next->signal_handler_caller) | |
286 | return frame_info->next->frame + 16; | |
287 | else | |
288 | return frame_info->frame + 4; | |
89c3b6d3 PDM |
289 | } |
290 | else | |
291 | return frame_info->frame; | |
292 | } | |
293 | ||
294 | CORE_ADDR | |
fba45db2 | 295 | delta68_frame_saved_pc (struct frame_info *frame_info) |
89c3b6d3 PDM |
296 | { |
297 | return read_memory_integer (delta68_frame_args_address (frame_info) + 4, 4); | |
298 | } | |
299 | ||
392a587b JM |
300 | /* Return number of args passed to a frame. |
301 | Can return -1, meaning no way to tell. */ | |
302 | ||
303 | int | |
fba45db2 | 304 | isi_frame_num_args (struct frame_info *fi) |
392a587b JM |
305 | { |
306 | int val; | |
307 | CORE_ADDR pc = FRAME_SAVED_PC (fi); | |
308 | int insn = 0177777 & read_memory_integer (pc, 2); | |
309 | val = 0; | |
c5aa993b | 310 | if (insn == 0047757 || insn == 0157374) /* lea W(sp),sp or addaw #W,sp */ |
392a587b | 311 | val = read_memory_integer (pc + 2, 2); |
c5aa993b JM |
312 | else if ((insn & 0170777) == 0050217 /* addql #N, sp */ |
313 | || (insn & 0170777) == 0050117) /* addqw */ | |
392a587b JM |
314 | { |
315 | val = (insn >> 9) & 7; | |
316 | if (val == 0) | |
317 | val = 8; | |
318 | } | |
c5aa993b | 319 | else if (insn == 0157774) /* addal #WW, sp */ |
392a587b JM |
320 | val = read_memory_integer (pc + 2, 4); |
321 | val >>= 2; | |
322 | return val; | |
323 | } | |
324 | ||
325 | int | |
fba45db2 | 326 | delta68_frame_num_args (struct frame_info *fi) |
392a587b JM |
327 | { |
328 | int val; | |
329 | CORE_ADDR pc = FRAME_SAVED_PC (fi); | |
330 | int insn = 0177777 & read_memory_integer (pc, 2); | |
331 | val = 0; | |
c5aa993b | 332 | if (insn == 0047757 || insn == 0157374) /* lea W(sp),sp or addaw #W,sp */ |
392a587b | 333 | val = read_memory_integer (pc + 2, 2); |
c5aa993b JM |
334 | else if ((insn & 0170777) == 0050217 /* addql #N, sp */ |
335 | || (insn & 0170777) == 0050117) /* addqw */ | |
392a587b JM |
336 | { |
337 | val = (insn >> 9) & 7; | |
338 | if (val == 0) | |
339 | val = 8; | |
340 | } | |
c5aa993b | 341 | else if (insn == 0157774) /* addal #WW, sp */ |
392a587b JM |
342 | val = read_memory_integer (pc + 2, 4); |
343 | val >>= 2; | |
344 | return val; | |
345 | } | |
346 | ||
347 | int | |
fba45db2 | 348 | news_frame_num_args (struct frame_info *fi) |
392a587b JM |
349 | { |
350 | int val; | |
351 | CORE_ADDR pc = FRAME_SAVED_PC (fi); | |
352 | int insn = 0177777 & read_memory_integer (pc, 2); | |
353 | val = 0; | |
c5aa993b | 354 | if (insn == 0047757 || insn == 0157374) /* lea W(sp),sp or addaw #W,sp */ |
392a587b | 355 | val = read_memory_integer (pc + 2, 2); |
c5aa993b JM |
356 | else if ((insn & 0170777) == 0050217 /* addql #N, sp */ |
357 | || (insn & 0170777) == 0050117) /* addqw */ | |
392a587b JM |
358 | { |
359 | val = (insn >> 9) & 7; | |
360 | if (val == 0) | |
361 | val = 8; | |
362 | } | |
c5aa993b | 363 | else if (insn == 0157774) /* addal #WW, sp */ |
392a587b JM |
364 | val = read_memory_integer (pc + 2, 4); |
365 | val >>= 2; | |
366 | return val; | |
367 | } | |
b83266a0 | 368 | |
7f8e7424 GS |
369 | /* Insert the specified number of args and function address |
370 | into a call sequence of the above form stored at DUMMYNAME. | |
371 | We use the BFD routines to store a big-endian value of known size. */ | |
372 | ||
373 | void | |
a2c6a6d5 GS |
374 | m68k_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun, int nargs, |
375 | struct value **args, struct type *type, int gcc_p) | |
7f8e7424 | 376 | { |
a2c6a6d5 GS |
377 | bfd_putb32 (fun, (unsigned char *) dummy + CALL_DUMMY_START_OFFSET + 2); |
378 | bfd_putb32 (nargs * 4, | |
379 | (unsigned char *) dummy + CALL_DUMMY_START_OFFSET + 8); | |
7f8e7424 GS |
380 | } |
381 | ||
382 | ||
c906108c SS |
383 | /* Push an empty stack frame, to record the current PC, etc. */ |
384 | ||
385 | void | |
fba45db2 | 386 | m68k_push_dummy_frame (void) |
c906108c SS |
387 | { |
388 | register CORE_ADDR sp = read_register (SP_REGNUM); | |
389 | register int regnum; | |
390 | char raw_buffer[12]; | |
391 | ||
392 | sp = push_word (sp, read_register (PC_REGNUM)); | |
393 | sp = push_word (sp, read_register (FP_REGNUM)); | |
394 | write_register (FP_REGNUM, sp); | |
395 | ||
396 | /* Always save the floating-point registers, whether they exist on | |
397 | this target or not. */ | |
398 | for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--) | |
399 | { | |
400 | read_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 12); | |
401 | sp = push_bytes (sp, raw_buffer, 12); | |
402 | } | |
403 | ||
404 | for (regnum = FP_REGNUM - 1; regnum >= 0; regnum--) | |
405 | { | |
406 | sp = push_word (sp, read_register (regnum)); | |
407 | } | |
408 | sp = push_word (sp, read_register (PS_REGNUM)); | |
409 | write_register (SP_REGNUM, sp); | |
410 | } | |
411 | ||
412 | /* Discard from the stack the innermost frame, | |
413 | restoring all saved registers. */ | |
414 | ||
415 | void | |
fba45db2 | 416 | m68k_pop_frame (void) |
c906108c SS |
417 | { |
418 | register struct frame_info *frame = get_current_frame (); | |
419 | register CORE_ADDR fp; | |
420 | register int regnum; | |
c906108c SS |
421 | char raw_buffer[12]; |
422 | ||
423 | fp = FRAME_FP (frame); | |
7f8e7424 | 424 | m68k_frame_init_saved_regs (frame); |
c5aa993b | 425 | for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--) |
c906108c | 426 | { |
7f8e7424 | 427 | if (frame->saved_regs[regnum]) |
c906108c | 428 | { |
7f8e7424 | 429 | read_memory (frame->saved_regs[regnum], raw_buffer, 12); |
c906108c SS |
430 | write_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 12); |
431 | } | |
432 | } | |
c5aa993b | 433 | for (regnum = FP_REGNUM - 1; regnum >= 0; regnum--) |
c906108c | 434 | { |
7f8e7424 | 435 | if (frame->saved_regs[regnum]) |
c906108c | 436 | { |
a2c6a6d5 GS |
437 | write_register (regnum, |
438 | read_memory_integer (frame->saved_regs[regnum], 4)); | |
c906108c SS |
439 | } |
440 | } | |
7f8e7424 | 441 | if (frame->saved_regs[PS_REGNUM]) |
c906108c | 442 | { |
b5d78d39 | 443 | write_register (PS_REGNUM, |
7f8e7424 | 444 | read_memory_integer (frame->saved_regs[PS_REGNUM], 4)); |
c906108c SS |
445 | } |
446 | write_register (FP_REGNUM, read_memory_integer (fp, 4)); | |
447 | write_register (PC_REGNUM, read_memory_integer (fp + 4, 4)); | |
448 | write_register (SP_REGNUM, fp + 8); | |
449 | flush_cached_frames (); | |
450 | } | |
c906108c | 451 | \f |
c5aa993b | 452 | |
c906108c SS |
453 | /* Given an ip value corresponding to the start of a function, |
454 | return the ip of the first instruction after the function | |
455 | prologue. This is the generic m68k support. Machines which | |
456 | require something different can override the SKIP_PROLOGUE | |
457 | macro to point elsewhere. | |
458 | ||
459 | Some instructions which typically may appear in a function | |
460 | prologue include: | |
461 | ||
462 | A link instruction, word form: | |
463 | ||
c5aa993b | 464 | link.w %a6,&0 4e56 XXXX |
c906108c SS |
465 | |
466 | A link instruction, long form: | |
467 | ||
c5aa993b | 468 | link.l %fp,&F%1 480e XXXX XXXX |
c906108c SS |
469 | |
470 | A movm instruction to preserve integer regs: | |
471 | ||
c5aa993b | 472 | movm.l &M%1,(4,%sp) 48ef XXXX XXXX |
c906108c SS |
473 | |
474 | A fmovm instruction to preserve float regs: | |
475 | ||
c5aa993b | 476 | fmovm &FPM%1,(FPO%1,%sp) f237 XXXX XXXX XXXX XXXX |
c906108c SS |
477 | |
478 | Some profiling setup code (FIXME, not recognized yet): | |
479 | ||
c5aa993b JM |
480 | lea.l (.L3,%pc),%a1 43fb XXXX XXXX XXXX |
481 | bsr _mcount 61ff XXXX XXXX | |
c906108c | 482 | |
c5aa993b | 483 | */ |
c906108c | 484 | |
c906108c | 485 | CORE_ADDR |
fba45db2 | 486 | m68k_skip_prologue (CORE_ADDR ip) |
c906108c SS |
487 | { |
488 | register CORE_ADDR limit; | |
489 | struct symtab_and_line sal; | |
490 | register int op; | |
491 | ||
492 | /* Find out if there is a known limit for the extent of the prologue. | |
493 | If so, ensure we don't go past it. If not, assume "infinity". */ | |
494 | ||
495 | sal = find_pc_line (ip, 0); | |
b5d78d39 | 496 | limit = (sal.end) ? sal.end : (CORE_ADDR) ~0; |
c906108c SS |
497 | |
498 | while (ip < limit) | |
499 | { | |
500 | op = read_memory_integer (ip, 2); | |
501 | op &= 0xFFFF; | |
c5aa993b | 502 | |
89c3b6d3 PDM |
503 | if (op == P_LINKW_FP) |
504 | ip += 4; /* Skip link.w */ | |
505 | else if (op == P_PEA_FP) | |
c5aa993b | 506 | ip += 2; /* Skip pea %fp */ |
89c3b6d3 | 507 | else if (op == P_MOVL_SP_FP) |
c5aa993b | 508 | ip += 2; /* Skip move.l %sp, %fp */ |
89c3b6d3 PDM |
509 | else if (op == P_LINKL_FP) |
510 | ip += 6; /* Skip link.l */ | |
511 | else if (op == P_MOVML) | |
512 | ip += 6; /* Skip movm.l */ | |
c906108c | 513 | else if (op == P_FMOVM) |
89c3b6d3 | 514 | ip += 10; /* Skip fmovm */ |
c906108c | 515 | else |
b5d78d39 | 516 | break; /* Found unknown code, bail out. */ |
c906108c SS |
517 | } |
518 | return (ip); | |
519 | } | |
520 | ||
7f8e7424 GS |
521 | /* Store the addresses of the saved registers of the frame described by |
522 | FRAME_INFO in its saved_regs field. | |
523 | This includes special registers such as pc and fp saved in special | |
524 | ways in the stack frame. sp is even more special: | |
525 | the address we return for it IS the sp for the next frame. */ | |
526 | ||
c906108c | 527 | void |
7f8e7424 | 528 | m68k_frame_init_saved_regs (struct frame_info *frame_info) |
c906108c | 529 | { |
c5aa993b JM |
530 | register int regnum; |
531 | register int regmask; | |
532 | register CORE_ADDR next_addr; | |
c906108c SS |
533 | register CORE_ADDR pc; |
534 | ||
535 | /* First possible address for a pc in a call dummy for this frame. */ | |
536 | CORE_ADDR possible_call_dummy_start = | |
7f8e7424 | 537 | (frame_info)->frame - 28 - FP_REGNUM * 4 - 4 - 8 * 12; |
c906108c SS |
538 | |
539 | int nextinsn; | |
7f8e7424 GS |
540 | |
541 | if (frame_info->saved_regs) | |
542 | return; | |
543 | ||
544 | frame_saved_regs_zalloc (frame_info); | |
545 | ||
546 | memset (frame_info->saved_regs, 0, SIZEOF_FRAME_SAVED_REGS); | |
547 | ||
c906108c SS |
548 | if ((frame_info)->pc >= possible_call_dummy_start |
549 | && (frame_info)->pc <= (frame_info)->frame) | |
550 | { | |
551 | ||
552 | /* It is a call dummy. We could just stop now, since we know | |
c5aa993b JM |
553 | what the call dummy saves and where. But this code proceeds |
554 | to parse the "prologue" which is part of the call dummy. | |
555 | This is needlessly complex and confusing. FIXME. */ | |
c906108c SS |
556 | |
557 | next_addr = (frame_info)->frame; | |
558 | pc = possible_call_dummy_start; | |
559 | } | |
c5aa993b | 560 | else |
c906108c | 561 | { |
c5aa993b | 562 | pc = get_pc_function_start ((frame_info)->pc); |
c906108c | 563 | |
89c3b6d3 PDM |
564 | nextinsn = read_memory_integer (pc, 2); |
565 | if (P_PEA_FP == nextinsn | |
566 | && P_MOVL_SP_FP == read_memory_integer (pc + 2, 2)) | |
c906108c | 567 | { |
89c3b6d3 | 568 | /* pea %fp |
c5aa993b | 569 | move.l %sp, %fp */ |
c906108c | 570 | next_addr = frame_info->frame; |
89c3b6d3 | 571 | pc += 4; |
c906108c | 572 | } |
89c3b6d3 | 573 | else if (P_LINKL_FP == nextinsn) |
c906108c SS |
574 | /* link.l %fp */ |
575 | /* Find the address above the saved | |
576 | regs using the amount of storage from the link instruction. */ | |
89c3b6d3 PDM |
577 | { |
578 | next_addr = (frame_info)->frame + read_memory_integer (pc + 2, 4); | |
579 | pc += 6; | |
580 | } | |
581 | else if (P_LINKW_FP == nextinsn) | |
c906108c SS |
582 | /* link.w %fp */ |
583 | /* Find the address above the saved | |
584 | regs using the amount of storage from the link instruction. */ | |
89c3b6d3 PDM |
585 | { |
586 | next_addr = (frame_info)->frame + read_memory_integer (pc + 2, 2); | |
587 | pc += 4; | |
588 | } | |
c5aa993b JM |
589 | else |
590 | goto lose; | |
591 | ||
592 | /* If have an addal #-n, sp next, adjust next_addr. */ | |
593 | if ((0177777 & read_memory_integer (pc, 2)) == 0157774) | |
594 | next_addr += read_memory_integer (pc += 2, 4), pc += 4; | |
595 | } | |
c5aa993b | 596 | |
b5d78d39 | 597 | for (;;) |
c5aa993b | 598 | { |
89c3b6d3 | 599 | nextinsn = 0xffff & read_memory_integer (pc, 2); |
c5aa993b | 600 | regmask = read_memory_integer (pc + 2, 2); |
89c3b6d3 PDM |
601 | /* fmovemx to -(sp) */ |
602 | if (0xf227 == nextinsn && (regmask & 0xff00) == 0xe000) | |
c906108c | 603 | { |
89c3b6d3 PDM |
604 | /* Regmask's low bit is for register fp7, the first pushed */ |
605 | for (regnum = FP0_REGNUM + 8; --regnum >= FP0_REGNUM; regmask >>= 1) | |
606 | if (regmask & 1) | |
7f8e7424 | 607 | frame_info->saved_regs[regnum] = (next_addr -= 12); |
89c3b6d3 PDM |
608 | pc += 4; |
609 | } | |
610 | /* fmovemx to (fp + displacement) */ | |
611 | else if (0171056 == nextinsn && (regmask & 0xff00) == 0xf000) | |
612 | { | |
613 | register CORE_ADDR addr; | |
614 | ||
615 | addr = (frame_info)->frame + read_memory_integer (pc + 4, 2); | |
616 | /* Regmask's low bit is for register fp7, the first pushed */ | |
617 | for (regnum = FP0_REGNUM + 8; --regnum >= FP0_REGNUM; regmask >>= 1) | |
618 | if (regmask & 1) | |
619 | { | |
7f8e7424 | 620 | frame_info->saved_regs[regnum] = addr; |
89c3b6d3 PDM |
621 | addr += 12; |
622 | } | |
623 | pc += 6; | |
624 | } | |
625 | /* moveml to (sp) */ | |
626 | else if (0044327 == nextinsn) | |
627 | { | |
628 | /* Regmask's low bit is for register 0, the first written */ | |
629 | for (regnum = 0; regnum < 16; regnum++, regmask >>= 1) | |
630 | if (regmask & 1) | |
631 | { | |
7f8e7424 | 632 | frame_info->saved_regs[regnum] = next_addr; |
89c3b6d3 PDM |
633 | next_addr += 4; |
634 | } | |
635 | pc += 4; | |
636 | } | |
637 | /* moveml to (fp + displacement) */ | |
638 | else if (0044356 == nextinsn) | |
639 | { | |
640 | register CORE_ADDR addr; | |
641 | ||
642 | addr = (frame_info)->frame + read_memory_integer (pc + 4, 2); | |
643 | /* Regmask's low bit is for register 0, the first written */ | |
644 | for (regnum = 0; regnum < 16; regnum++, regmask >>= 1) | |
645 | if (regmask & 1) | |
646 | { | |
7f8e7424 | 647 | frame_info->saved_regs[regnum] = addr; |
89c3b6d3 PDM |
648 | addr += 4; |
649 | } | |
650 | pc += 6; | |
651 | } | |
652 | /* moveml to -(sp) */ | |
653 | else if (0044347 == nextinsn) | |
654 | { | |
655 | /* Regmask's low bit is for register 15, the first pushed */ | |
656 | for (regnum = 16; --regnum >= 0; regmask >>= 1) | |
657 | if (regmask & 1) | |
7f8e7424 | 658 | frame_info->saved_regs[regnum] = (next_addr -= 4); |
89c3b6d3 PDM |
659 | pc += 4; |
660 | } | |
661 | /* movl r,-(sp) */ | |
662 | else if (0x2f00 == (0xfff0 & nextinsn)) | |
663 | { | |
664 | regnum = 0xf & nextinsn; | |
7f8e7424 | 665 | frame_info->saved_regs[regnum] = (next_addr -= 4); |
89c3b6d3 | 666 | pc += 2; |
c906108c | 667 | } |
89c3b6d3 PDM |
668 | /* fmovemx to index of sp */ |
669 | else if (0xf236 == nextinsn && (regmask & 0xff00) == 0xf000) | |
670 | { | |
671 | /* Regmask's low bit is for register fp0, the first written */ | |
672 | for (regnum = FP0_REGNUM + 8; --regnum >= FP0_REGNUM; regmask >>= 1) | |
673 | if (regmask & 1) | |
674 | { | |
7f8e7424 | 675 | frame_info->saved_regs[regnum] = next_addr; |
89c3b6d3 PDM |
676 | next_addr += 12; |
677 | } | |
678 | pc += 10; | |
679 | } | |
680 | /* clrw -(sp); movw ccr,-(sp) */ | |
681 | else if (0x4267 == nextinsn && 0x42e7 == regmask) | |
682 | { | |
7f8e7424 | 683 | frame_info->saved_regs[PS_REGNUM] = (next_addr -= 4); |
89c3b6d3 PDM |
684 | pc += 4; |
685 | } | |
686 | else | |
687 | break; | |
c906108c | 688 | } |
c5aa993b | 689 | lose:; |
7f8e7424 GS |
690 | frame_info->saved_regs[SP_REGNUM] = (frame_info)->frame + 8; |
691 | frame_info->saved_regs[FP_REGNUM] = (frame_info)->frame; | |
692 | frame_info->saved_regs[PC_REGNUM] = (frame_info)->frame + 4; | |
c906108c SS |
693 | #ifdef SIG_SP_FP_OFFSET |
694 | /* Adjust saved SP_REGNUM for fake _sigtramp frames. */ | |
695 | if (frame_info->signal_handler_caller && frame_info->next) | |
7f8e7424 GS |
696 | frame_info->saved_regs[SP_REGNUM] = |
697 | frame_info->next->frame + SIG_SP_FP_OFFSET; | |
c906108c SS |
698 | #endif |
699 | } | |
700 | ||
701 | ||
c5aa993b | 702 | #ifdef USE_PROC_FS /* Target dependent support for /proc */ |
c906108c SS |
703 | |
704 | #include <sys/procfs.h> | |
705 | ||
c60c0f5f MS |
706 | /* Prototypes for supply_gregset etc. */ |
707 | #include "gregset.h" | |
708 | ||
c906108c | 709 | /* The /proc interface divides the target machine's register set up into |
c5aa993b JM |
710 | two different sets, the general register set (gregset) and the floating |
711 | point register set (fpregset). For each set, there is an ioctl to get | |
712 | the current register set and another ioctl to set the current values. | |
c906108c | 713 | |
c5aa993b JM |
714 | The actual structure passed through the ioctl interface is, of course, |
715 | naturally machine dependent, and is different for each set of registers. | |
716 | For the m68k for example, the general register set is typically defined | |
717 | by: | |
c906108c | 718 | |
c5aa993b | 719 | typedef int gregset_t[18]; |
c906108c | 720 | |
c5aa993b JM |
721 | #define R_D0 0 |
722 | ... | |
723 | #define R_PS 17 | |
c906108c | 724 | |
c5aa993b | 725 | and the floating point set by: |
c906108c | 726 | |
c5aa993b JM |
727 | typedef struct fpregset { |
728 | int f_pcr; | |
729 | int f_psr; | |
730 | int f_fpiaddr; | |
731 | int f_fpregs[8][3]; (8 regs, 96 bits each) | |
732 | } fpregset_t; | |
c906108c | 733 | |
c5aa993b JM |
734 | These routines provide the packing and unpacking of gregset_t and |
735 | fpregset_t formatted data. | |
c906108c SS |
736 | |
737 | */ | |
738 | ||
739 | /* Atari SVR4 has R_SR but not R_PS */ | |
740 | ||
741 | #if !defined (R_PS) && defined (R_SR) | |
742 | #define R_PS R_SR | |
743 | #endif | |
744 | ||
745 | /* Given a pointer to a general register set in /proc format (gregset_t *), | |
c5aa993b JM |
746 | unpack the register contents and supply them as gdb's idea of the current |
747 | register values. */ | |
c906108c SS |
748 | |
749 | void | |
fba45db2 | 750 | supply_gregset (gregset_t *gregsetp) |
c906108c SS |
751 | { |
752 | register int regi; | |
753 | register greg_t *regp = (greg_t *) gregsetp; | |
754 | ||
c5aa993b | 755 | for (regi = 0; regi < R_PC; regi++) |
c906108c SS |
756 | { |
757 | supply_register (regi, (char *) (regp + regi)); | |
758 | } | |
759 | supply_register (PS_REGNUM, (char *) (regp + R_PS)); | |
760 | supply_register (PC_REGNUM, (char *) (regp + R_PC)); | |
761 | } | |
762 | ||
763 | void | |
fba45db2 | 764 | fill_gregset (gregset_t *gregsetp, int regno) |
c906108c SS |
765 | { |
766 | register int regi; | |
767 | register greg_t *regp = (greg_t *) gregsetp; | |
c906108c | 768 | |
c5aa993b | 769 | for (regi = 0; regi < R_PC; regi++) |
c906108c SS |
770 | { |
771 | if ((regno == -1) || (regno == regi)) | |
772 | { | |
773 | *(regp + regi) = *(int *) ®isters[REGISTER_BYTE (regi)]; | |
774 | } | |
775 | } | |
776 | if ((regno == -1) || (regno == PS_REGNUM)) | |
777 | { | |
778 | *(regp + R_PS) = *(int *) ®isters[REGISTER_BYTE (PS_REGNUM)]; | |
779 | } | |
780 | if ((regno == -1) || (regno == PC_REGNUM)) | |
781 | { | |
782 | *(regp + R_PC) = *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)]; | |
783 | } | |
784 | } | |
785 | ||
786 | #if defined (FP0_REGNUM) | |
787 | ||
788 | /* Given a pointer to a floating point register set in /proc format | |
c5aa993b JM |
789 | (fpregset_t *), unpack the register contents and supply them as gdb's |
790 | idea of the current floating point register values. */ | |
c906108c | 791 | |
c5aa993b | 792 | void |
fba45db2 | 793 | supply_fpregset (fpregset_t *fpregsetp) |
c906108c SS |
794 | { |
795 | register int regi; | |
796 | char *from; | |
c5aa993b JM |
797 | |
798 | for (regi = FP0_REGNUM; regi < FPC_REGNUM; regi++) | |
c906108c | 799 | { |
c5aa993b | 800 | from = (char *) &(fpregsetp->f_fpregs[regi - FP0_REGNUM][0]); |
c906108c SS |
801 | supply_register (regi, from); |
802 | } | |
c5aa993b JM |
803 | supply_register (FPC_REGNUM, (char *) &(fpregsetp->f_pcr)); |
804 | supply_register (FPS_REGNUM, (char *) &(fpregsetp->f_psr)); | |
805 | supply_register (FPI_REGNUM, (char *) &(fpregsetp->f_fpiaddr)); | |
c906108c SS |
806 | } |
807 | ||
808 | /* Given a pointer to a floating point register set in /proc format | |
c5aa993b JM |
809 | (fpregset_t *), update the register specified by REGNO from gdb's idea |
810 | of the current floating point register set. If REGNO is -1, update | |
811 | them all. */ | |
c906108c SS |
812 | |
813 | void | |
fba45db2 | 814 | fill_fpregset (fpregset_t *fpregsetp, int regno) |
c906108c SS |
815 | { |
816 | int regi; | |
817 | char *to; | |
818 | char *from; | |
c906108c | 819 | |
c5aa993b | 820 | for (regi = FP0_REGNUM; regi < FPC_REGNUM; regi++) |
c906108c SS |
821 | { |
822 | if ((regno == -1) || (regno == regi)) | |
823 | { | |
824 | from = (char *) ®isters[REGISTER_BYTE (regi)]; | |
c5aa993b | 825 | to = (char *) &(fpregsetp->f_fpregs[regi - FP0_REGNUM][0]); |
c906108c SS |
826 | memcpy (to, from, REGISTER_RAW_SIZE (regi)); |
827 | } | |
828 | } | |
829 | if ((regno == -1) || (regno == FPC_REGNUM)) | |
830 | { | |
c5aa993b | 831 | fpregsetp->f_pcr = *(int *) ®isters[REGISTER_BYTE (FPC_REGNUM)]; |
c906108c SS |
832 | } |
833 | if ((regno == -1) || (regno == FPS_REGNUM)) | |
834 | { | |
c5aa993b | 835 | fpregsetp->f_psr = *(int *) ®isters[REGISTER_BYTE (FPS_REGNUM)]; |
c906108c SS |
836 | } |
837 | if ((regno == -1) || (regno == FPI_REGNUM)) | |
838 | { | |
c5aa993b | 839 | fpregsetp->f_fpiaddr = *(int *) ®isters[REGISTER_BYTE (FPI_REGNUM)]; |
c906108c SS |
840 | } |
841 | } | |
842 | ||
c5aa993b | 843 | #endif /* defined (FP0_REGNUM) */ |
c906108c | 844 | |
c5aa993b | 845 | #endif /* USE_PROC_FS */ |
c906108c | 846 | |
c906108c SS |
847 | /* Figure out where the longjmp will land. Slurp the args out of the stack. |
848 | We expect the first arg to be a pointer to the jmp_buf structure from which | |
849 | we extract the pc (JB_PC) that we will land at. The pc is copied into PC. | |
850 | This routine returns true on success. */ | |
851 | ||
2765b798 AC |
852 | /* NOTE: cagney/2000-11-08: For this function to be fully multi-arched |
853 | the macro's JB_PC and JB_ELEMENT_SIZE would need to be moved into | |
854 | the ``struct gdbarch_tdep'' object and then set on a target ISA/ABI | |
855 | dependant basis. */ | |
856 | ||
c906108c | 857 | int |
f4281f55 | 858 | m68k_get_longjmp_target (CORE_ADDR *pc) |
c906108c | 859 | { |
2765b798 | 860 | #if defined (JB_PC) && defined (JB_ELEMENT_SIZE) |
35fc8285 | 861 | char *buf; |
c906108c SS |
862 | CORE_ADDR sp, jb_addr; |
863 | ||
35fc8285 | 864 | buf = alloca (TARGET_PTR_BIT / TARGET_CHAR_BIT); |
c5aa993b | 865 | sp = read_register (SP_REGNUM); |
c906108c | 866 | |
b5d78d39 GS |
867 | if (target_read_memory (sp + SP_ARG0, /* Offset of first arg on stack */ |
868 | buf, TARGET_PTR_BIT / TARGET_CHAR_BIT)) | |
c906108c SS |
869 | return 0; |
870 | ||
871 | jb_addr = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT); | |
872 | ||
873 | if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, buf, | |
874 | TARGET_PTR_BIT / TARGET_CHAR_BIT)) | |
875 | return 0; | |
876 | ||
877 | *pc = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT); | |
878 | ||
879 | return 1; | |
2765b798 | 880 | #else |
8e65ff28 AC |
881 | internal_error (__FILE__, __LINE__, |
882 | "m68k_get_longjmp_target: not implemented"); | |
2765b798 AC |
883 | return 0; |
884 | #endif | |
c906108c | 885 | } |
c906108c SS |
886 | |
887 | /* Immediately after a function call, return the saved pc before the frame | |
888 | is setup. For sun3's, we check for the common case of being inside of a | |
889 | system call, and if so, we know that Sun pushes the call # on the stack | |
890 | prior to doing the trap. */ | |
891 | ||
892 | CORE_ADDR | |
fba45db2 | 893 | m68k_saved_pc_after_call (struct frame_info *frame) |
c906108c SS |
894 | { |
895 | #ifdef SYSCALL_TRAP | |
896 | int op; | |
897 | ||
898 | op = read_memory_integer (frame->pc - SYSCALL_TRAP_OFFSET, 2); | |
899 | ||
900 | if (op == SYSCALL_TRAP) | |
901 | return read_memory_integer (read_register (SP_REGNUM) + 4, 4); | |
902 | else | |
903 | #endif /* SYSCALL_TRAP */ | |
904 | return read_memory_integer (read_register (SP_REGNUM), 4); | |
905 | } | |
906 | ||
152d9db6 GS |
907 | /* Function: m68k_gdbarch_init |
908 | Initializer function for the m68k gdbarch vector. | |
909 | Called by gdbarch. Sets up the gdbarch vector(s) for this target. */ | |
910 | ||
911 | static struct gdbarch * | |
912 | m68k_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) | |
913 | { | |
a2c6a6d5 GS |
914 | static LONGEST call_dummy_words[7] = { 0xf227e0ff, 0x48e7fffc, 0x426742e7, |
915 | 0x4eb93232, 0x3232dffc, 0x69696969, | |
916 | (0x4e404e71 | (BPT_VECTOR << 16)) | |
917 | }; | |
152d9db6 GS |
918 | struct gdbarch_tdep *tdep = NULL; |
919 | struct gdbarch *gdbarch; | |
920 | ||
921 | /* find a candidate among the list of pre-declared architectures. */ | |
922 | arches = gdbarch_list_lookup_by_info (arches, &info); | |
923 | if (arches != NULL) | |
924 | return (arches->gdbarch); | |
925 | ||
926 | #if 0 | |
927 | tdep = (struct gdbarch_tdep *) xmalloc (sizeof (struct gdbarch_tdep)); | |
928 | #endif | |
6300c360 | 929 | |
152d9db6 GS |
930 | gdbarch = gdbarch_alloc (&info, 0); |
931 | ||
5d3ed2e3 GS |
932 | set_gdbarch_long_double_format (gdbarch, &floatformat_m68881_ext); |
933 | set_gdbarch_long_double_bit (gdbarch, 96); | |
934 | ||
935 | set_gdbarch_function_start_offset (gdbarch, 0); | |
936 | ||
937 | set_gdbarch_skip_prologue (gdbarch, m68k_skip_prologue); | |
938 | set_gdbarch_saved_pc_after_call (gdbarch, m68k_saved_pc_after_call); | |
939 | ||
940 | /* Stack grows down. */ | |
941 | set_gdbarch_inner_than (gdbarch, core_addr_lessthan); | |
942 | set_gdbarch_stack_align (gdbarch, m68k_stack_align); | |
943 | ||
6300c360 GS |
944 | |
945 | set_gdbarch_believe_pcc_promotion (gdbarch, 1); | |
942dc0e9 GS |
946 | set_gdbarch_decr_pc_after_break (gdbarch, 2); |
947 | ||
948 | set_gdbarch_store_struct_return (gdbarch, m68k_store_struct_return); | |
949 | set_gdbarch_deprecated_extract_return_value (gdbarch, | |
950 | m68k_deprecated_extract_return_value); | |
951 | set_gdbarch_store_return_value (gdbarch, m68k_store_return_value); | |
952 | ||
953 | set_gdbarch_frame_chain (gdbarch, m68k_frame_chain); | |
6300c360 | 954 | set_gdbarch_frame_chain_valid (gdbarch, generic_func_frame_chain_valid); |
942dc0e9 GS |
955 | set_gdbarch_frame_saved_pc (gdbarch, m68k_frame_saved_pc); |
956 | set_gdbarch_frame_init_saved_regs (gdbarch, m68k_frame_init_saved_regs); | |
957 | set_gdbarch_frameless_function_invocation (gdbarch, | |
958 | m68k_frameless_function_invocation); | |
6300c360 GS |
959 | /* OK to default this value to 'unknown'. */ |
960 | set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown); | |
961 | set_gdbarch_frame_args_skip (gdbarch, 8); | |
962 | set_gdbarch_frame_args_address (gdbarch, default_frame_address); | |
963 | set_gdbarch_frame_locals_address (gdbarch, default_frame_address); | |
942dc0e9 | 964 | |
5d3ed2e3 GS |
965 | set_gdbarch_register_raw_size (gdbarch, m68k_register_raw_size); |
966 | set_gdbarch_register_virtual_size (gdbarch, m68k_register_virtual_size); | |
967 | set_gdbarch_max_register_raw_size (gdbarch, 12); | |
968 | set_gdbarch_max_register_virtual_size (gdbarch, 12); | |
969 | set_gdbarch_register_virtual_type (gdbarch, m68k_register_virtual_type); | |
970 | set_gdbarch_register_name (gdbarch, m68k_register_name); | |
971 | set_gdbarch_register_size (gdbarch, 4); | |
972 | set_gdbarch_register_byte (gdbarch, m68k_register_byte); | |
942dc0e9 GS |
973 | set_gdbarch_num_regs (gdbarch, 29); |
974 | set_gdbarch_register_bytes_ok (gdbarch, m68k_register_bytes_ok); | |
975 | set_gdbarch_register_bytes (gdbarch, (16 * 4 + 8 + 8 * 12 + 3 * 4)); | |
6300c360 GS |
976 | set_gdbarch_sp_regnum (gdbarch, E_SP_REGNUM); |
977 | set_gdbarch_fp_regnum (gdbarch, E_FP_REGNUM); | |
978 | set_gdbarch_pc_regnum (gdbarch, E_PC_REGNUM); | |
979 | set_gdbarch_ps_regnum (gdbarch, E_PS_REGNUM); | |
980 | set_gdbarch_fp0_regnum (gdbarch, E_FP0_REGNUM); | |
a2c6a6d5 | 981 | |
7f8e7424 GS |
982 | set_gdbarch_use_generic_dummy_frames (gdbarch, 0); |
983 | set_gdbarch_call_dummy_location (gdbarch, ON_STACK); | |
984 | set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1); | |
a2c6a6d5 | 985 | set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 24); |
7f8e7424 GS |
986 | set_gdbarch_pc_in_call_dummy (gdbarch, pc_in_call_dummy_on_stack); |
987 | set_gdbarch_call_dummy_p (gdbarch, 1); | |
988 | set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0); | |
989 | set_gdbarch_call_dummy_length (gdbarch, 28); | |
990 | set_gdbarch_call_dummy_start_offset (gdbarch, 12); | |
a2c6a6d5 | 991 | |
7f8e7424 GS |
992 | set_gdbarch_call_dummy_words (gdbarch, call_dummy_words); |
993 | set_gdbarch_sizeof_call_dummy_words (gdbarch, sizeof (call_dummy_words)); | |
994 | set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0); | |
995 | set_gdbarch_fix_call_dummy (gdbarch, m68k_fix_call_dummy); | |
996 | set_gdbarch_push_dummy_frame (gdbarch, m68k_push_dummy_frame); | |
997 | set_gdbarch_pop_frame (gdbarch, m68k_pop_frame); | |
a2c6a6d5 | 998 | |
152d9db6 GS |
999 | return gdbarch; |
1000 | } | |
1001 | ||
1002 | ||
1003 | static void | |
1004 | m68k_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file) | |
1005 | { | |
1006 | ||
1007 | } | |
2acceee2 | 1008 | |
c906108c | 1009 | void |
fba45db2 | 1010 | _initialize_m68k_tdep (void) |
c906108c | 1011 | { |
152d9db6 | 1012 | gdbarch_register (bfd_arch_m68k, m68k_gdbarch_init, m68k_dump_tdep); |
c906108c SS |
1013 | tm_print_insn = print_insn_m68k; |
1014 | } |