Commit | Line | Data |
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c906108c | 1 | /* Target-dependent code for the Matsushita MN10300 for GDB, the GNU debugger. |
b6ba6518 | 2 | Copyright 1996, 1997, 1998, 1999, 2000, 2001 |
8e65ff28 | 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 "inferior.h" | |
25 | #include "obstack.h" | |
26 | #include "target.h" | |
27 | #include "value.h" | |
28 | #include "bfd.h" | |
29 | #include "gdb_string.h" | |
30 | #include "gdbcore.h" | |
31 | #include "symfile.h" | |
4e052eda | 32 | #include "regcache.h" |
ad8fe2ce | 33 | #include "arch-utils.h" |
c906108c | 34 | |
c2c6d25f | 35 | extern void _initialize_mn10300_tdep (void); |
a14ed312 KB |
36 | static CORE_ADDR mn10300_analyze_prologue (struct frame_info *fi, |
37 | CORE_ADDR pc); | |
c906108c | 38 | |
91225883 AC |
39 | /* mn10300 private data */ |
40 | struct gdbarch_tdep | |
41 | { | |
42 | int am33_mode; | |
43 | #define AM33_MODE (gdbarch_tdep (current_gdbarch)->am33_mode) | |
44 | }; | |
45 | ||
c906108c SS |
46 | /* Additional info used by the frame */ |
47 | ||
48 | struct frame_extra_info | |
c5aa993b JM |
49 | { |
50 | int status; | |
51 | int stack_size; | |
52 | }; | |
c906108c | 53 | |
0f71a2f6 | 54 | |
91225883 AC |
55 | static char * |
56 | register_name (int reg, char **regs, long sizeof_regs) | |
c2d11a7d | 57 | { |
91225883 AC |
58 | if (reg < 0 || reg >= sizeof_regs / sizeof (regs[0])) |
59 | return NULL; | |
60 | else | |
61 | return regs[reg]; | |
62 | } | |
63 | ||
64 | static char * | |
65 | mn10300_generic_register_name (int reg) | |
0f71a2f6 | 66 | { |
91225883 AC |
67 | static char *regs[] = |
68 | { "d0", "d1", "d2", "d3", "a0", "a1", "a2", "a3", | |
69 | "sp", "pc", "mdr", "psw", "lir", "lar", "", "", | |
70 | "", "", "", "", "", "", "", "", | |
71 | "", "", "", "", "", "", "", "fp" | |
72 | }; | |
73 | return register_name (reg, regs, sizeof regs); | |
0f71a2f6 JM |
74 | } |
75 | ||
91225883 AC |
76 | |
77 | static char * | |
78 | am33_register_name (int reg) | |
79 | { | |
80 | static char *regs[] = | |
81 | { "d0", "d1", "d2", "d3", "a0", "a1", "a2", "a3", | |
82 | "sp", "pc", "mdr", "psw", "lir", "lar", "", | |
83 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
84 | "ssp", "msp", "usp", "mcrh", "mcrl", "mcvf", "", "", "" | |
85 | }; | |
86 | return register_name (reg, regs, sizeof regs); | |
87 | } | |
88 | ||
2ac51b36 | 89 | static CORE_ADDR |
fba45db2 | 90 | mn10300_saved_pc_after_call (struct frame_info *fi) |
0f71a2f6 JM |
91 | { |
92 | return read_memory_integer (read_register (SP_REGNUM), 4); | |
93 | } | |
94 | ||
c064f384 | 95 | static void |
fba45db2 | 96 | mn10300_extract_return_value (struct type *type, char *regbuf, char *valbuf) |
0f71a2f6 JM |
97 | { |
98 | if (TYPE_CODE (type) == TYPE_CODE_PTR) | |
99 | memcpy (valbuf, regbuf + REGISTER_BYTE (4), TYPE_LENGTH (type)); | |
100 | else | |
101 | memcpy (valbuf, regbuf + REGISTER_BYTE (0), TYPE_LENGTH (type)); | |
102 | } | |
103 | ||
2ac51b36 | 104 | static CORE_ADDR |
fba45db2 | 105 | mn10300_extract_struct_value_address (char *regbuf) |
0f71a2f6 JM |
106 | { |
107 | return extract_address (regbuf + REGISTER_BYTE (4), | |
108 | REGISTER_RAW_SIZE (4)); | |
109 | } | |
110 | ||
2ac51b36 | 111 | static void |
fba45db2 | 112 | mn10300_store_return_value (struct type *type, char *valbuf) |
0f71a2f6 JM |
113 | { |
114 | if (TYPE_CODE (type) == TYPE_CODE_PTR) | |
115 | write_register_bytes (REGISTER_BYTE (4), valbuf, TYPE_LENGTH (type)); | |
116 | else | |
117 | write_register_bytes (REGISTER_BYTE (0), valbuf, TYPE_LENGTH (type)); | |
118 | } | |
119 | ||
a14ed312 | 120 | static struct frame_info *analyze_dummy_frame (CORE_ADDR, CORE_ADDR); |
c906108c | 121 | static struct frame_info * |
fba45db2 | 122 | analyze_dummy_frame (CORE_ADDR pc, CORE_ADDR frame) |
c906108c SS |
123 | { |
124 | static struct frame_info *dummy = NULL; | |
125 | if (dummy == NULL) | |
126 | { | |
127 | dummy = xmalloc (sizeof (struct frame_info)); | |
128 | dummy->saved_regs = xmalloc (SIZEOF_FRAME_SAVED_REGS); | |
129 | dummy->extra_info = xmalloc (sizeof (struct frame_extra_info)); | |
130 | } | |
131 | dummy->next = NULL; | |
132 | dummy->prev = NULL; | |
133 | dummy->pc = pc; | |
134 | dummy->frame = frame; | |
135 | dummy->extra_info->status = 0; | |
136 | dummy->extra_info->stack_size = 0; | |
137 | memset (dummy->saved_regs, '\000', SIZEOF_FRAME_SAVED_REGS); | |
138 | mn10300_analyze_prologue (dummy, 0); | |
139 | return dummy; | |
140 | } | |
141 | ||
142 | /* Values for frame_info.status */ | |
143 | ||
144 | #define MY_FRAME_IN_SP 0x1 | |
145 | #define MY_FRAME_IN_FP 0x2 | |
146 | #define NO_MORE_FRAMES 0x4 | |
147 | ||
148 | ||
149 | /* Should call_function allocate stack space for a struct return? */ | |
2ac51b36 | 150 | static int |
fba45db2 | 151 | mn10300_use_struct_convention (int gcc_p, struct type *type) |
c906108c SS |
152 | { |
153 | return (TYPE_NFIELDS (type) > 1 || TYPE_LENGTH (type) > 8); | |
154 | } | |
155 | ||
156 | /* The breakpoint instruction must be the same size as the smallest | |
157 | instruction in the instruction set. | |
158 | ||
159 | The Matsushita mn10x00 processors have single byte instructions | |
160 | so we need a single byte breakpoint. Matsushita hasn't defined | |
161 | one, so we defined it ourselves. */ | |
162 | ||
2ac51b36 | 163 | static unsigned char * |
fba45db2 | 164 | mn10300_breakpoint_from_pc (CORE_ADDR *bp_addr, int *bp_size) |
c906108c | 165 | { |
c5aa993b JM |
166 | static char breakpoint[] = |
167 | {0xff}; | |
c906108c SS |
168 | *bp_size = 1; |
169 | return breakpoint; | |
170 | } | |
171 | ||
172 | ||
173 | /* Fix fi->frame if it's bogus at this point. This is a helper | |
174 | function for mn10300_analyze_prologue. */ | |
175 | ||
176 | static void | |
fba45db2 | 177 | fix_frame_pointer (struct frame_info *fi, int stack_size) |
c906108c SS |
178 | { |
179 | if (fi && fi->next == NULL) | |
180 | { | |
181 | if (fi->extra_info->status & MY_FRAME_IN_SP) | |
182 | fi->frame = read_sp () - stack_size; | |
183 | else if (fi->extra_info->status & MY_FRAME_IN_FP) | |
184 | fi->frame = read_register (A3_REGNUM); | |
185 | } | |
186 | } | |
187 | ||
188 | ||
189 | /* Set offsets of registers saved by movm instruction. | |
190 | This is a helper function for mn10300_analyze_prologue. */ | |
191 | ||
192 | static void | |
fba45db2 | 193 | set_movm_offsets (struct frame_info *fi, int movm_args) |
c906108c SS |
194 | { |
195 | int offset = 0; | |
196 | ||
197 | if (fi == NULL || movm_args == 0) | |
198 | return; | |
199 | ||
ae83b20d JB |
200 | if (movm_args & movm_other_bit) |
201 | { | |
202 | /* The `other' bit leaves a blank area of four bytes at the | |
203 | beginning of its block of saved registers, making it 32 bytes | |
204 | long in total. */ | |
205 | fi->saved_regs[LAR_REGNUM] = fi->frame + offset + 4; | |
206 | fi->saved_regs[LIR_REGNUM] = fi->frame + offset + 8; | |
207 | fi->saved_regs[MDR_REGNUM] = fi->frame + offset + 12; | |
208 | fi->saved_regs[A0_REGNUM + 1] = fi->frame + offset + 16; | |
209 | fi->saved_regs[A0_REGNUM] = fi->frame + offset + 20; | |
210 | fi->saved_regs[D0_REGNUM + 1] = fi->frame + offset + 24; | |
211 | fi->saved_regs[D0_REGNUM] = fi->frame + offset + 28; | |
212 | offset += 32; | |
213 | } | |
214 | if (movm_args & movm_a3_bit) | |
c906108c SS |
215 | { |
216 | fi->saved_regs[A3_REGNUM] = fi->frame + offset; | |
217 | offset += 4; | |
218 | } | |
ae83b20d | 219 | if (movm_args & movm_a2_bit) |
c906108c SS |
220 | { |
221 | fi->saved_regs[A2_REGNUM] = fi->frame + offset; | |
222 | offset += 4; | |
223 | } | |
ae83b20d | 224 | if (movm_args & movm_d3_bit) |
c906108c SS |
225 | { |
226 | fi->saved_regs[D3_REGNUM] = fi->frame + offset; | |
227 | offset += 4; | |
228 | } | |
ae83b20d | 229 | if (movm_args & movm_d2_bit) |
c906108c SS |
230 | { |
231 | fi->saved_regs[D2_REGNUM] = fi->frame + offset; | |
232 | offset += 4; | |
233 | } | |
ae83b20d | 234 | if (AM33_MODE) |
c2d11a7d | 235 | { |
ae83b20d JB |
236 | if (movm_args & movm_exother_bit) |
237 | { | |
238 | fi->saved_regs[MCVF_REGNUM] = fi->frame + offset; | |
239 | fi->saved_regs[MCRL_REGNUM] = fi->frame + offset + 4; | |
240 | fi->saved_regs[MCRH_REGNUM] = fi->frame + offset + 8; | |
241 | fi->saved_regs[MDRQ_REGNUM] = fi->frame + offset + 12; | |
242 | fi->saved_regs[E0_REGNUM + 1] = fi->frame + offset + 16; | |
243 | fi->saved_regs[E0_REGNUM + 0] = fi->frame + offset + 20; | |
244 | offset += 24; | |
245 | } | |
246 | if (movm_args & movm_exreg1_bit) | |
247 | { | |
248 | fi->saved_regs[E0_REGNUM + 7] = fi->frame + offset; | |
249 | fi->saved_regs[E0_REGNUM + 6] = fi->frame + offset + 4; | |
250 | fi->saved_regs[E0_REGNUM + 5] = fi->frame + offset + 8; | |
251 | fi->saved_regs[E0_REGNUM + 4] = fi->frame + offset + 12; | |
252 | offset += 16; | |
253 | } | |
254 | if (movm_args & movm_exreg0_bit) | |
255 | { | |
256 | fi->saved_regs[E0_REGNUM + 3] = fi->frame + offset; | |
257 | fi->saved_regs[E0_REGNUM + 2] = fi->frame + offset + 4; | |
258 | offset += 8; | |
259 | } | |
c2d11a7d | 260 | } |
c906108c SS |
261 | } |
262 | ||
263 | ||
264 | /* The main purpose of this file is dealing with prologues to extract | |
265 | information about stack frames and saved registers. | |
266 | ||
267 | For reference here's how prologues look on the mn10300: | |
268 | ||
c5aa993b JM |
269 | With frame pointer: |
270 | movm [d2,d3,a2,a3],sp | |
271 | mov sp,a3 | |
272 | add <size>,sp | |
c906108c | 273 | |
c5aa993b JM |
274 | Without frame pointer: |
275 | movm [d2,d3,a2,a3],sp (if needed) | |
276 | add <size>,sp | |
c906108c SS |
277 | |
278 | One day we might keep the stack pointer constant, that won't | |
279 | change the code for prologues, but it will make the frame | |
280 | pointerless case much more common. */ | |
c5aa993b | 281 | |
c906108c SS |
282 | /* Analyze the prologue to determine where registers are saved, |
283 | the end of the prologue, etc etc. Return the end of the prologue | |
284 | scanned. | |
285 | ||
286 | We store into FI (if non-null) several tidbits of information: | |
287 | ||
c5aa993b JM |
288 | * stack_size -- size of this stack frame. Note that if we stop in |
289 | certain parts of the prologue/epilogue we may claim the size of the | |
290 | current frame is zero. This happens when the current frame has | |
291 | not been allocated yet or has already been deallocated. | |
c906108c | 292 | |
c5aa993b | 293 | * fsr -- Addresses of registers saved in the stack by this frame. |
c906108c | 294 | |
c5aa993b JM |
295 | * status -- A (relatively) generic status indicator. It's a bitmask |
296 | with the following bits: | |
c906108c | 297 | |
c5aa993b JM |
298 | MY_FRAME_IN_SP: The base of the current frame is actually in |
299 | the stack pointer. This can happen for frame pointerless | |
300 | functions, or cases where we're stopped in the prologue/epilogue | |
301 | itself. For these cases mn10300_analyze_prologue will need up | |
302 | update fi->frame before returning or analyzing the register | |
303 | save instructions. | |
c906108c | 304 | |
c5aa993b JM |
305 | MY_FRAME_IN_FP: The base of the current frame is in the |
306 | frame pointer register ($a2). | |
c906108c | 307 | |
c5aa993b JM |
308 | NO_MORE_FRAMES: Set this if the current frame is "start" or |
309 | if the first instruction looks like mov <imm>,sp. This tells | |
310 | frame chain to not bother trying to unwind past this frame. */ | |
c906108c SS |
311 | |
312 | static CORE_ADDR | |
fba45db2 | 313 | mn10300_analyze_prologue (struct frame_info *fi, CORE_ADDR pc) |
c906108c SS |
314 | { |
315 | CORE_ADDR func_addr, func_end, addr, stop; | |
316 | CORE_ADDR stack_size; | |
317 | int imm_size; | |
318 | unsigned char buf[4]; | |
319 | int status, movm_args = 0; | |
320 | char *name; | |
321 | ||
322 | /* Use the PC in the frame if it's provided to look up the | |
323 | start of this function. */ | |
324 | pc = (fi ? fi->pc : pc); | |
325 | ||
326 | /* Find the start of this function. */ | |
327 | status = find_pc_partial_function (pc, &name, &func_addr, &func_end); | |
328 | ||
329 | /* Do nothing if we couldn't find the start of this function or if we're | |
330 | stopped at the first instruction in the prologue. */ | |
331 | if (status == 0) | |
43ff13b4 JM |
332 | { |
333 | return pc; | |
334 | } | |
c906108c SS |
335 | |
336 | /* If we're in start, then give up. */ | |
337 | if (strcmp (name, "start") == 0) | |
338 | { | |
339 | if (fi != NULL) | |
340 | fi->extra_info->status = NO_MORE_FRAMES; | |
341 | return pc; | |
342 | } | |
343 | ||
344 | /* At the start of a function our frame is in the stack pointer. */ | |
345 | if (fi) | |
346 | fi->extra_info->status = MY_FRAME_IN_SP; | |
347 | ||
348 | /* Get the next two bytes into buf, we need two because rets is a two | |
349 | byte insn and the first isn't enough to uniquely identify it. */ | |
350 | status = read_memory_nobpt (pc, buf, 2); | |
351 | if (status != 0) | |
352 | return pc; | |
353 | ||
354 | /* If we're physically on an "rets" instruction, then our frame has | |
355 | already been deallocated. Note this can also be true for retf | |
356 | and ret if they specify a size of zero. | |
357 | ||
358 | In this case fi->frame is bogus, we need to fix it. */ | |
359 | if (fi && buf[0] == 0xf0 && buf[1] == 0xfc) | |
360 | { | |
361 | if (fi->next == NULL) | |
362 | fi->frame = read_sp (); | |
363 | return fi->pc; | |
364 | } | |
365 | ||
366 | /* Similarly if we're stopped on the first insn of a prologue as our | |
367 | frame hasn't been allocated yet. */ | |
368 | if (fi && fi->pc == func_addr) | |
369 | { | |
370 | if (fi->next == NULL) | |
371 | fi->frame = read_sp (); | |
372 | return fi->pc; | |
373 | } | |
374 | ||
375 | /* Figure out where to stop scanning. */ | |
376 | stop = fi ? fi->pc : func_end; | |
377 | ||
378 | /* Don't walk off the end of the function. */ | |
379 | stop = stop > func_end ? func_end : stop; | |
380 | ||
381 | /* Start scanning on the first instruction of this function. */ | |
382 | addr = func_addr; | |
383 | ||
384 | /* Suck in two bytes. */ | |
385 | status = read_memory_nobpt (addr, buf, 2); | |
386 | if (status != 0) | |
387 | { | |
388 | fix_frame_pointer (fi, 0); | |
389 | return addr; | |
390 | } | |
391 | ||
392 | /* First see if this insn sets the stack pointer; if so, it's something | |
393 | we won't understand, so quit now. */ | |
394 | if (buf[0] == 0xf2 && (buf[1] & 0xf3) == 0xf0) | |
395 | { | |
396 | if (fi) | |
397 | fi->extra_info->status = NO_MORE_FRAMES; | |
398 | return addr; | |
399 | } | |
400 | ||
401 | /* Now look for movm [regs],sp, which saves the callee saved registers. | |
402 | ||
403 | At this time we don't know if fi->frame is valid, so we only note | |
404 | that we encountered a movm instruction. Later, we'll set the entries | |
405 | in fsr.regs as needed. */ | |
406 | if (buf[0] == 0xcf) | |
407 | { | |
408 | /* Extract the register list for the movm instruction. */ | |
409 | status = read_memory_nobpt (addr + 1, buf, 1); | |
410 | movm_args = *buf; | |
411 | ||
412 | addr += 2; | |
413 | ||
414 | /* Quit now if we're beyond the stop point. */ | |
415 | if (addr >= stop) | |
416 | { | |
417 | /* Fix fi->frame since it's bogus at this point. */ | |
418 | if (fi && fi->next == NULL) | |
419 | fi->frame = read_sp (); | |
420 | ||
421 | /* Note if/where callee saved registers were saved. */ | |
422 | set_movm_offsets (fi, movm_args); | |
423 | return addr; | |
424 | } | |
425 | ||
426 | /* Get the next two bytes so the prologue scan can continue. */ | |
427 | status = read_memory_nobpt (addr, buf, 2); | |
428 | if (status != 0) | |
429 | { | |
430 | /* Fix fi->frame since it's bogus at this point. */ | |
431 | if (fi && fi->next == NULL) | |
432 | fi->frame = read_sp (); | |
433 | ||
434 | /* Note if/where callee saved registers were saved. */ | |
435 | set_movm_offsets (fi, movm_args); | |
436 | return addr; | |
437 | } | |
438 | } | |
439 | ||
440 | /* Now see if we set up a frame pointer via "mov sp,a3" */ | |
441 | if (buf[0] == 0x3f) | |
442 | { | |
443 | addr += 1; | |
444 | ||
445 | /* The frame pointer is now valid. */ | |
446 | if (fi) | |
447 | { | |
448 | fi->extra_info->status |= MY_FRAME_IN_FP; | |
449 | fi->extra_info->status &= ~MY_FRAME_IN_SP; | |
450 | } | |
451 | ||
452 | /* Quit now if we're beyond the stop point. */ | |
453 | if (addr >= stop) | |
454 | { | |
455 | /* Fix fi->frame if it's bogus at this point. */ | |
456 | fix_frame_pointer (fi, 0); | |
457 | ||
458 | /* Note if/where callee saved registers were saved. */ | |
459 | set_movm_offsets (fi, movm_args); | |
460 | return addr; | |
461 | } | |
462 | ||
463 | /* Get two more bytes so scanning can continue. */ | |
464 | status = read_memory_nobpt (addr, buf, 2); | |
465 | if (status != 0) | |
466 | { | |
467 | /* Fix fi->frame if it's bogus at this point. */ | |
468 | fix_frame_pointer (fi, 0); | |
469 | ||
470 | /* Note if/where callee saved registers were saved. */ | |
471 | set_movm_offsets (fi, movm_args); | |
472 | return addr; | |
473 | } | |
474 | } | |
c5aa993b | 475 | |
c906108c SS |
476 | /* Next we should allocate the local frame. No more prologue insns |
477 | are found after allocating the local frame. | |
c5aa993b | 478 | |
c906108c | 479 | Search for add imm8,sp (0xf8feXX) |
c5aa993b JM |
480 | or add imm16,sp (0xfafeXXXX) |
481 | or add imm32,sp (0xfcfeXXXXXXXX). | |
482 | ||
c906108c SS |
483 | If none of the above was found, then this prologue has no |
484 | additional stack. */ | |
485 | ||
486 | status = read_memory_nobpt (addr, buf, 2); | |
487 | if (status != 0) | |
488 | { | |
489 | /* Fix fi->frame if it's bogus at this point. */ | |
490 | fix_frame_pointer (fi, 0); | |
491 | ||
492 | /* Note if/where callee saved registers were saved. */ | |
493 | set_movm_offsets (fi, movm_args); | |
494 | return addr; | |
495 | } | |
496 | ||
497 | imm_size = 0; | |
498 | if (buf[0] == 0xf8 && buf[1] == 0xfe) | |
499 | imm_size = 1; | |
500 | else if (buf[0] == 0xfa && buf[1] == 0xfe) | |
501 | imm_size = 2; | |
502 | else if (buf[0] == 0xfc && buf[1] == 0xfe) | |
503 | imm_size = 4; | |
504 | ||
505 | if (imm_size != 0) | |
506 | { | |
507 | /* Suck in imm_size more bytes, they'll hold the size of the | |
508 | current frame. */ | |
509 | status = read_memory_nobpt (addr + 2, buf, imm_size); | |
510 | if (status != 0) | |
511 | { | |
512 | /* Fix fi->frame if it's bogus at this point. */ | |
513 | fix_frame_pointer (fi, 0); | |
514 | ||
515 | /* Note if/where callee saved registers were saved. */ | |
516 | set_movm_offsets (fi, movm_args); | |
517 | return addr; | |
518 | } | |
519 | ||
520 | /* Note the size of the stack in the frame info structure. */ | |
521 | stack_size = extract_signed_integer (buf, imm_size); | |
522 | if (fi) | |
523 | fi->extra_info->stack_size = stack_size; | |
524 | ||
525 | /* We just consumed 2 + imm_size bytes. */ | |
526 | addr += 2 + imm_size; | |
527 | ||
528 | /* No more prologue insns follow, so begin preparation to return. */ | |
529 | /* Fix fi->frame if it's bogus at this point. */ | |
530 | fix_frame_pointer (fi, stack_size); | |
531 | ||
532 | /* Note if/where callee saved registers were saved. */ | |
533 | set_movm_offsets (fi, movm_args); | |
534 | return addr; | |
535 | } | |
536 | ||
537 | /* We never found an insn which allocates local stack space, regardless | |
538 | this is the end of the prologue. */ | |
539 | /* Fix fi->frame if it's bogus at this point. */ | |
540 | fix_frame_pointer (fi, 0); | |
541 | ||
542 | /* Note if/where callee saved registers were saved. */ | |
543 | set_movm_offsets (fi, movm_args); | |
544 | return addr; | |
545 | } | |
c5aa993b | 546 | |
ae83b20d JB |
547 | |
548 | /* Function: saved_regs_size | |
549 | Return the size in bytes of the register save area, based on the | |
550 | saved_regs array in FI. */ | |
551 | static int | |
552 | saved_regs_size (struct frame_info *fi) | |
553 | { | |
554 | int adjust = 0; | |
555 | int i; | |
556 | ||
557 | /* Reserve four bytes for every register saved. */ | |
558 | for (i = 0; i < NUM_REGS; i++) | |
559 | if (fi->saved_regs[i]) | |
560 | adjust += 4; | |
561 | ||
562 | /* If we saved LIR, then it's most likely we used a `movm' | |
563 | instruction with the `other' bit set, in which case the SP is | |
564 | decremented by an extra four bytes, "to simplify calculation | |
565 | of the transfer area", according to the processor manual. */ | |
566 | if (fi->saved_regs[LIR_REGNUM]) | |
567 | adjust += 4; | |
568 | ||
569 | return adjust; | |
570 | } | |
571 | ||
572 | ||
c906108c SS |
573 | /* Function: frame_chain |
574 | Figure out and return the caller's frame pointer given current | |
575 | frame_info struct. | |
576 | ||
577 | We don't handle dummy frames yet but we would probably just return the | |
578 | stack pointer that was in use at the time the function call was made? */ | |
579 | ||
2ac51b36 | 580 | static CORE_ADDR |
fba45db2 | 581 | mn10300_frame_chain (struct frame_info *fi) |
c906108c SS |
582 | { |
583 | struct frame_info *dummy; | |
584 | /* Walk through the prologue to determine the stack size, | |
585 | location of saved registers, end of the prologue, etc. */ | |
586 | if (fi->extra_info->status == 0) | |
c5aa993b | 587 | mn10300_analyze_prologue (fi, (CORE_ADDR) 0); |
c906108c SS |
588 | |
589 | /* Quit now if mn10300_analyze_prologue set NO_MORE_FRAMES. */ | |
590 | if (fi->extra_info->status & NO_MORE_FRAMES) | |
591 | return 0; | |
592 | ||
593 | /* Now that we've analyzed our prologue, determine the frame | |
594 | pointer for our caller. | |
595 | ||
c5aa993b JM |
596 | If our caller has a frame pointer, then we need to |
597 | find the entry value of $a3 to our function. | |
598 | ||
599 | If fsr.regs[A3_REGNUM] is nonzero, then it's at the memory | |
600 | location pointed to by fsr.regs[A3_REGNUM]. | |
c906108c | 601 | |
c5aa993b | 602 | Else it's still in $a3. |
c906108c | 603 | |
c5aa993b JM |
604 | If our caller does not have a frame pointer, then his |
605 | frame base is fi->frame + -caller's stack size. */ | |
c906108c | 606 | |
c906108c SS |
607 | /* The easiest way to get that info is to analyze our caller's frame. |
608 | So we set up a dummy frame and call mn10300_analyze_prologue to | |
609 | find stuff for us. */ | |
610 | dummy = analyze_dummy_frame (FRAME_SAVED_PC (fi), fi->frame); | |
611 | ||
612 | if (dummy->extra_info->status & MY_FRAME_IN_FP) | |
613 | { | |
614 | /* Our caller has a frame pointer. So find the frame in $a3 or | |
615 | in the stack. */ | |
616 | if (fi->saved_regs[A3_REGNUM]) | |
617 | return (read_memory_integer (fi->saved_regs[A3_REGNUM], REGISTER_SIZE)); | |
618 | else | |
619 | return read_register (A3_REGNUM); | |
620 | } | |
621 | else | |
622 | { | |
ae83b20d | 623 | int adjust = saved_regs_size (fi); |
c906108c SS |
624 | |
625 | /* Our caller does not have a frame pointer. So his frame starts | |
c5aa993b JM |
626 | at the base of our frame (fi->frame) + register save space |
627 | + <his size>. */ | |
c906108c SS |
628 | return fi->frame + adjust + -dummy->extra_info->stack_size; |
629 | } | |
630 | } | |
631 | ||
632 | /* Function: skip_prologue | |
633 | Return the address of the first inst past the prologue of the function. */ | |
634 | ||
2ac51b36 | 635 | static CORE_ADDR |
fba45db2 | 636 | mn10300_skip_prologue (CORE_ADDR pc) |
c906108c SS |
637 | { |
638 | /* We used to check the debug symbols, but that can lose if | |
639 | we have a null prologue. */ | |
640 | return mn10300_analyze_prologue (NULL, pc); | |
641 | } | |
642 | ||
ee9f9641 JB |
643 | /* generic_pop_current_frame calls this function if the current |
644 | frame isn't a dummy frame. */ | |
645 | static void | |
646 | mn10300_pop_frame_regular (struct frame_info *frame) | |
c906108c SS |
647 | { |
648 | int regnum; | |
649 | ||
ee9f9641 | 650 | write_register (PC_REGNUM, FRAME_SAVED_PC (frame)); |
c906108c | 651 | |
ee9f9641 JB |
652 | /* Restore any saved registers. */ |
653 | for (regnum = 0; regnum < NUM_REGS; regnum++) | |
654 | if (frame->saved_regs[regnum] != 0) | |
655 | { | |
656 | ULONGEST value; | |
c906108c | 657 | |
ee9f9641 JB |
658 | value = read_memory_unsigned_integer (frame->saved_regs[regnum], |
659 | REGISTER_RAW_SIZE (regnum)); | |
660 | write_register (regnum, value); | |
661 | } | |
c906108c | 662 | |
ee9f9641 JB |
663 | /* Actually cut back the stack. */ |
664 | write_register (SP_REGNUM, FRAME_FP (frame)); | |
c906108c | 665 | |
ee9f9641 JB |
666 | /* Don't we need to set the PC?!? XXX FIXME. */ |
667 | } | |
668 | ||
669 | /* Function: pop_frame | |
670 | This routine gets called when either the user uses the `return' | |
671 | command, or the call dummy breakpoint gets hit. */ | |
672 | static void | |
673 | mn10300_pop_frame (void) | |
674 | { | |
675 | /* This function checks for and handles generic dummy frames, and | |
676 | calls back to our function for ordinary frames. */ | |
677 | generic_pop_current_frame (mn10300_pop_frame_regular); | |
c906108c SS |
678 | |
679 | /* Throw away any cached frame information. */ | |
680 | flush_cached_frames (); | |
681 | } | |
682 | ||
683 | /* Function: push_arguments | |
684 | Setup arguments for a call to the target. Arguments go in | |
685 | order on the stack. */ | |
686 | ||
2ac51b36 | 687 | static CORE_ADDR |
91225883 AC |
688 | mn10300_push_arguments (int nargs, struct value **args, CORE_ADDR sp, |
689 | int struct_return, CORE_ADDR struct_addr) | |
c906108c SS |
690 | { |
691 | int argnum = 0; | |
692 | int len = 0; | |
693 | int stack_offset = 0; | |
694 | int regsused = struct_return ? 1 : 0; | |
695 | ||
696 | /* This should be a nop, but align the stack just in case something | |
697 | went wrong. Stacks are four byte aligned on the mn10300. */ | |
698 | sp &= ~3; | |
699 | ||
700 | /* Now make space on the stack for the args. | |
701 | ||
702 | XXX This doesn't appear to handle pass-by-invisible reference | |
703 | arguments. */ | |
704 | for (argnum = 0; argnum < nargs; argnum++) | |
705 | { | |
706 | int arg_length = (TYPE_LENGTH (VALUE_TYPE (args[argnum])) + 3) & ~3; | |
707 | ||
708 | while (regsused < 2 && arg_length > 0) | |
709 | { | |
710 | regsused++; | |
711 | arg_length -= 4; | |
712 | } | |
713 | len += arg_length; | |
714 | } | |
715 | ||
716 | /* Allocate stack space. */ | |
717 | sp -= len; | |
718 | ||
719 | regsused = struct_return ? 1 : 0; | |
720 | /* Push all arguments onto the stack. */ | |
721 | for (argnum = 0; argnum < nargs; argnum++) | |
722 | { | |
723 | int len; | |
724 | char *val; | |
725 | ||
726 | /* XXX Check this. What about UNIONS? */ | |
727 | if (TYPE_CODE (VALUE_TYPE (*args)) == TYPE_CODE_STRUCT | |
728 | && TYPE_LENGTH (VALUE_TYPE (*args)) > 8) | |
729 | { | |
730 | /* XXX Wrong, we want a pointer to this argument. */ | |
c5aa993b JM |
731 | len = TYPE_LENGTH (VALUE_TYPE (*args)); |
732 | val = (char *) VALUE_CONTENTS (*args); | |
c906108c SS |
733 | } |
734 | else | |
735 | { | |
736 | len = TYPE_LENGTH (VALUE_TYPE (*args)); | |
c5aa993b | 737 | val = (char *) VALUE_CONTENTS (*args); |
c906108c SS |
738 | } |
739 | ||
740 | while (regsused < 2 && len > 0) | |
741 | { | |
742 | write_register (regsused, extract_unsigned_integer (val, 4)); | |
743 | val += 4; | |
744 | len -= 4; | |
745 | regsused++; | |
746 | } | |
747 | ||
748 | while (len > 0) | |
749 | { | |
750 | write_memory (sp + stack_offset, val, 4); | |
751 | len -= 4; | |
752 | val += 4; | |
753 | stack_offset += 4; | |
754 | } | |
755 | ||
756 | args++; | |
757 | } | |
758 | ||
759 | /* Make space for the flushback area. */ | |
760 | sp -= 8; | |
761 | return sp; | |
762 | } | |
763 | ||
764 | /* Function: push_return_address (pc) | |
765 | Set up the return address for the inferior function call. | |
766 | Needed for targets where we don't actually execute a JSR/BSR instruction */ | |
c5aa993b | 767 | |
2ac51b36 | 768 | static CORE_ADDR |
fba45db2 | 769 | mn10300_push_return_address (CORE_ADDR pc, CORE_ADDR sp) |
c906108c SS |
770 | { |
771 | unsigned char buf[4]; | |
772 | ||
773 | store_unsigned_integer (buf, 4, CALL_DUMMY_ADDRESS ()); | |
774 | write_memory (sp - 4, buf, 4); | |
775 | return sp - 4; | |
776 | } | |
777 | ||
778 | /* Function: store_struct_return (addr,sp) | |
779 | Store the structure value return address for an inferior function | |
780 | call. */ | |
c5aa993b | 781 | |
2ac51b36 | 782 | static void |
fba45db2 | 783 | mn10300_store_struct_return (CORE_ADDR addr, CORE_ADDR sp) |
c906108c SS |
784 | { |
785 | /* The structure return address is passed as the first argument. */ | |
786 | write_register (0, addr); | |
c906108c | 787 | } |
c5aa993b | 788 | |
c906108c SS |
789 | /* Function: frame_saved_pc |
790 | Find the caller of this frame. We do this by seeing if RP_REGNUM | |
791 | is saved in the stack anywhere, otherwise we get it from the | |
792 | registers. If the inner frame is a dummy frame, return its PC | |
793 | instead of RP, because that's where "caller" of the dummy-frame | |
794 | will be found. */ | |
795 | ||
2ac51b36 | 796 | static CORE_ADDR |
fba45db2 | 797 | mn10300_frame_saved_pc (struct frame_info *fi) |
c906108c | 798 | { |
ae83b20d | 799 | int adjust = saved_regs_size (fi); |
c906108c SS |
800 | |
801 | return (read_memory_integer (fi->frame + adjust, REGISTER_SIZE)); | |
802 | } | |
803 | ||
c906108c SS |
804 | /* Function: mn10300_init_extra_frame_info |
805 | Setup the frame's frame pointer, pc, and frame addresses for saved | |
806 | registers. Most of the work is done in mn10300_analyze_prologue(). | |
807 | ||
808 | Note that when we are called for the last frame (currently active frame), | |
809 | that fi->pc and fi->frame will already be setup. However, fi->frame will | |
810 | be valid only if this routine uses FP. For previous frames, fi-frame will | |
811 | always be correct. mn10300_analyze_prologue will fix fi->frame if | |
812 | it's not valid. | |
813 | ||
814 | We can be called with the PC in the call dummy under two circumstances. | |
815 | First, during normal backtracing, second, while figuring out the frame | |
816 | pointer just prior to calling the target function (see run_stack_dummy). */ | |
817 | ||
2ac51b36 | 818 | static void |
ad8fe2ce | 819 | mn10300_init_extra_frame_info (int fromleaf, struct frame_info *fi) |
c906108c SS |
820 | { |
821 | if (fi->next) | |
822 | fi->pc = FRAME_SAVED_PC (fi->next); | |
823 | ||
824 | frame_saved_regs_zalloc (fi); | |
825 | fi->extra_info = (struct frame_extra_info *) | |
826 | frame_obstack_alloc (sizeof (struct frame_extra_info)); | |
827 | ||
828 | fi->extra_info->status = 0; | |
829 | fi->extra_info->stack_size = 0; | |
830 | ||
831 | mn10300_analyze_prologue (fi, 0); | |
832 | } | |
833 | ||
ad8fe2ce JB |
834 | |
835 | /* This function's job is handled by init_extra_frame_info. */ | |
2ac51b36 | 836 | static void |
ad8fe2ce JB |
837 | mn10300_frame_init_saved_regs (struct frame_info *frame) |
838 | { | |
839 | } | |
840 | ||
841 | ||
c906108c SS |
842 | /* Function: mn10300_virtual_frame_pointer |
843 | Return the register that the function uses for a frame pointer, | |
844 | plus any necessary offset to be applied to the register before | |
845 | any frame pointer offsets. */ | |
846 | ||
847 | void | |
fba45db2 | 848 | mn10300_virtual_frame_pointer (CORE_ADDR pc, long *reg, long *offset) |
c906108c SS |
849 | { |
850 | struct frame_info *dummy = analyze_dummy_frame (pc, 0); | |
851 | /* Set up a dummy frame_info, Analyze the prolog and fill in the | |
852 | extra info. */ | |
853 | /* Results will tell us which type of frame it uses. */ | |
854 | if (dummy->extra_info->status & MY_FRAME_IN_SP) | |
855 | { | |
c5aa993b | 856 | *reg = SP_REGNUM; |
c906108c SS |
857 | *offset = -(dummy->extra_info->stack_size); |
858 | } | |
859 | else | |
860 | { | |
c5aa993b | 861 | *reg = A3_REGNUM; |
c906108c SS |
862 | *offset = 0; |
863 | } | |
864 | } | |
c5aa993b | 865 | |
91225883 AC |
866 | static int |
867 | mn10300_reg_struct_has_addr (int gcc_p, struct type *type) | |
c906108c | 868 | { |
91225883 AC |
869 | return (TYPE_LENGTH (type) > 8); |
870 | } | |
c906108c | 871 | |
f6df245f AC |
872 | static struct type * |
873 | mn10300_register_virtual_type (int reg) | |
874 | { | |
875 | return builtin_type_int; | |
876 | } | |
877 | ||
878 | static int | |
879 | mn10300_register_byte (int reg) | |
880 | { | |
881 | return (reg * 4); | |
882 | } | |
883 | ||
884 | static int | |
885 | mn10300_register_virtual_size (int reg) | |
886 | { | |
887 | return 4; | |
888 | } | |
889 | ||
890 | static int | |
891 | mn10300_register_raw_size (int reg) | |
892 | { | |
893 | return 4; | |
894 | } | |
895 | ||
23436510 JB |
896 | /* If DWARF2 is a register number appearing in Dwarf2 debug info, then |
897 | mn10300_dwarf2_reg_to_regnum (DWARF2) is the corresponding GDB | |
898 | register number. Why don't Dwarf2 and GDB use the same numbering? | |
899 | Who knows? But since people have object files lying around with | |
900 | the existing Dwarf2 numbering, and other people have written stubs | |
901 | to work with the existing GDB, neither of them can change. So we | |
902 | just have to cope. */ | |
903 | static int | |
904 | mn10300_dwarf2_reg_to_regnum (int dwarf2) | |
905 | { | |
906 | /* This table is supposed to be shaped like the REGISTER_NAMES | |
907 | initializer in gcc/config/mn10300/mn10300.h. Registers which | |
908 | appear in GCC's numbering, but have no counterpart in GDB's | |
909 | world, are marked with a -1. */ | |
910 | static int dwarf2_to_gdb[] = { | |
911 | 0, 1, 2, 3, 4, 5, 6, 7, -1, 8, | |
912 | 15, 16, 17, 18, 19, 20, 21, 22 | |
913 | }; | |
914 | int gdb; | |
915 | ||
916 | if (dwarf2 < 0 | |
917 | || dwarf2 >= (sizeof (dwarf2_to_gdb) / sizeof (dwarf2_to_gdb[0])) | |
918 | || dwarf2_to_gdb[dwarf2] == -1) | |
919 | internal_error (__FILE__, __LINE__, | |
920 | "bogus register number in debug info: %d", dwarf2); | |
921 | ||
922 | return dwarf2_to_gdb[dwarf2]; | |
923 | } | |
924 | ||
f6df245f AC |
925 | static void |
926 | mn10300_print_register (const char *name, int regnum, int reg_width) | |
927 | { | |
928 | char *raw_buffer = alloca (MAX_REGISTER_RAW_SIZE); | |
929 | ||
930 | if (reg_width) | |
931 | printf_filtered ("%*s: ", reg_width, name); | |
932 | else | |
933 | printf_filtered ("%s: ", name); | |
934 | ||
935 | /* Get the data */ | |
936 | if (read_relative_register_raw_bytes (regnum, raw_buffer)) | |
937 | { | |
938 | printf_filtered ("[invalid]"); | |
939 | return; | |
940 | } | |
941 | else | |
942 | { | |
943 | int byte; | |
944 | if (TARGET_BYTE_ORDER == BIG_ENDIAN) | |
945 | { | |
946 | for (byte = REGISTER_RAW_SIZE (regnum) - REGISTER_VIRTUAL_SIZE (regnum); | |
947 | byte < REGISTER_RAW_SIZE (regnum); | |
948 | byte++) | |
949 | printf_filtered ("%02x", (unsigned char) raw_buffer[byte]); | |
950 | } | |
951 | else | |
952 | { | |
953 | for (byte = REGISTER_VIRTUAL_SIZE (regnum) - 1; | |
954 | byte >= 0; | |
955 | byte--) | |
956 | printf_filtered ("%02x", (unsigned char) raw_buffer[byte]); | |
957 | } | |
958 | } | |
959 | } | |
960 | ||
961 | static void | |
962 | mn10300_do_registers_info (int regnum, int fpregs) | |
963 | { | |
964 | if (regnum >= 0) | |
965 | { | |
966 | const char *name = REGISTER_NAME (regnum); | |
967 | if (name == NULL || name[0] == '\0') | |
968 | error ("Not a valid register for the current processor type"); | |
969 | mn10300_print_register (name, regnum, 0); | |
970 | printf_filtered ("\n"); | |
971 | } | |
972 | else | |
973 | { | |
974 | /* print registers in an array 4x8 */ | |
975 | int r; | |
976 | int reg; | |
977 | const int nr_in_row = 4; | |
978 | const int reg_width = 4; | |
979 | for (r = 0; r < NUM_REGS; r += nr_in_row) | |
980 | { | |
981 | int c; | |
982 | int printing = 0; | |
983 | int padding = 0; | |
984 | for (c = r; c < r + nr_in_row; c++) | |
985 | { | |
986 | const char *name = REGISTER_NAME (c); | |
987 | if (name != NULL && *name != '\0') | |
988 | { | |
989 | printing = 1; | |
990 | while (padding > 0) | |
991 | { | |
992 | printf_filtered (" "); | |
993 | padding--; | |
994 | } | |
995 | mn10300_print_register (name, c, reg_width); | |
996 | printf_filtered (" "); | |
997 | } | |
998 | else | |
999 | { | |
1000 | padding += (reg_width + 2 + 8 + 1); | |
1001 | } | |
1002 | } | |
1003 | if (printing) | |
1004 | printf_filtered ("\n"); | |
1005 | } | |
1006 | } | |
1007 | } | |
1008 | ||
91225883 | 1009 | /* Dump out the mn10300 speciic architecture information. */ |
c906108c | 1010 | |
91225883 AC |
1011 | static void |
1012 | mn10300_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file) | |
1013 | { | |
1014 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); | |
1015 | fprintf_unfiltered (file, "mn10300_dump_tdep: am33_mode = %d\n", | |
1016 | tdep->am33_mode); | |
1017 | } | |
c2d11a7d | 1018 | |
91225883 AC |
1019 | static struct gdbarch * |
1020 | mn10300_gdbarch_init (struct gdbarch_info info, | |
1021 | struct gdbarch_list *arches) | |
1022 | { | |
ad8fe2ce | 1023 | static LONGEST mn10300_call_dummy_words[] = { 0 }; |
91225883 AC |
1024 | struct gdbarch *gdbarch; |
1025 | struct gdbarch_tdep *tdep = NULL; | |
1026 | int am33_mode; | |
1027 | gdbarch_register_name_ftype *register_name; | |
1028 | int mach; | |
1029 | int num_regs; | |
1030 | ||
1031 | arches = gdbarch_list_lookup_by_info (arches, &info); | |
1032 | if (arches != NULL) | |
1033 | return arches->gdbarch; | |
1034 | tdep = xmalloc (sizeof (struct gdbarch_tdep)); | |
1035 | gdbarch = gdbarch_alloc (&info, tdep); | |
1036 | ||
1037 | if (info.bfd_arch_info != NULL | |
f6df245f | 1038 | && info.bfd_arch_info->arch == bfd_arch_mn10300) |
91225883 AC |
1039 | mach = info.bfd_arch_info->mach; |
1040 | else | |
1041 | mach = 0; | |
1042 | switch (mach) | |
1043 | { | |
1044 | case 0: | |
f6df245f | 1045 | case bfd_mach_mn10300: |
91225883 AC |
1046 | am33_mode = 0; |
1047 | register_name = mn10300_generic_register_name; | |
1048 | num_regs = 32; | |
1049 | break; | |
1050 | case bfd_mach_am33: | |
c2d11a7d | 1051 | am33_mode = 1; |
91225883 AC |
1052 | register_name = am33_register_name; |
1053 | num_regs = 32; | |
1054 | break; | |
1055 | default: | |
8e65ff28 AC |
1056 | internal_error (__FILE__, __LINE__, |
1057 | "mn10300_gdbarch_init: Unknown mn10300 variant"); | |
91225883 | 1058 | return NULL; /* keep GCC happy. */ |
c2d11a7d | 1059 | } |
c906108c | 1060 | |
584f96a8 JB |
1061 | /* Registers. */ |
1062 | set_gdbarch_num_regs (gdbarch, num_regs); | |
1063 | set_gdbarch_register_name (gdbarch, register_name); | |
f6df245f | 1064 | set_gdbarch_register_size (gdbarch, 4); |
584f96a8 JB |
1065 | set_gdbarch_register_bytes (gdbarch, |
1066 | num_regs * gdbarch_register_size (gdbarch)); | |
f6df245f | 1067 | set_gdbarch_max_register_raw_size (gdbarch, 4); |
584f96a8 | 1068 | set_gdbarch_register_raw_size (gdbarch, mn10300_register_raw_size); |
f6df245f | 1069 | set_gdbarch_register_byte (gdbarch, mn10300_register_byte); |
584f96a8 | 1070 | set_gdbarch_max_register_virtual_size (gdbarch, 4); |
f6df245f | 1071 | set_gdbarch_register_virtual_size (gdbarch, mn10300_register_virtual_size); |
584f96a8 | 1072 | set_gdbarch_register_virtual_type (gdbarch, mn10300_register_virtual_type); |
23436510 | 1073 | set_gdbarch_dwarf2_reg_to_regnum (gdbarch, mn10300_dwarf2_reg_to_regnum); |
f6df245f | 1074 | set_gdbarch_do_registers_info (gdbarch, mn10300_do_registers_info); |
ad8fe2ce | 1075 | set_gdbarch_fp_regnum (gdbarch, 31); |
584f96a8 JB |
1076 | |
1077 | /* Breakpoints. */ | |
ad8fe2ce JB |
1078 | set_gdbarch_breakpoint_from_pc (gdbarch, mn10300_breakpoint_from_pc); |
1079 | set_gdbarch_function_start_offset (gdbarch, 0); | |
1080 | set_gdbarch_decr_pc_after_break (gdbarch, 0); | |
584f96a8 JB |
1081 | |
1082 | /* Stack unwinding. */ | |
1083 | set_gdbarch_get_saved_register (gdbarch, generic_get_saved_register); | |
1084 | set_gdbarch_frame_chain_valid (gdbarch, generic_file_frame_chain_valid); | |
ad8fe2ce JB |
1085 | set_gdbarch_inner_than (gdbarch, core_addr_lessthan); |
1086 | set_gdbarch_frame_chain_valid (gdbarch, generic_file_frame_chain_valid); | |
1087 | set_gdbarch_saved_pc_after_call (gdbarch, mn10300_saved_pc_after_call); | |
1088 | set_gdbarch_init_extra_frame_info (gdbarch, mn10300_init_extra_frame_info); | |
1089 | set_gdbarch_frame_init_saved_regs (gdbarch, mn10300_frame_init_saved_regs); | |
1090 | set_gdbarch_frame_chain (gdbarch, mn10300_frame_chain); | |
1091 | set_gdbarch_frame_saved_pc (gdbarch, mn10300_frame_saved_pc); | |
1092 | set_gdbarch_extract_return_value (gdbarch, mn10300_extract_return_value); | |
1093 | set_gdbarch_extract_struct_value_address | |
1094 | (gdbarch, mn10300_extract_struct_value_address); | |
1095 | set_gdbarch_store_return_value (gdbarch, mn10300_store_return_value); | |
1096 | set_gdbarch_store_struct_return (gdbarch, mn10300_store_struct_return); | |
ee9f9641 | 1097 | set_gdbarch_pop_frame (gdbarch, mn10300_pop_frame); |
ad8fe2ce JB |
1098 | set_gdbarch_skip_prologue (gdbarch, mn10300_skip_prologue); |
1099 | set_gdbarch_frame_args_skip (gdbarch, 0); | |
1100 | set_gdbarch_frame_args_address (gdbarch, default_frame_address); | |
1101 | set_gdbarch_frame_locals_address (gdbarch, default_frame_address); | |
1102 | set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown); | |
1103 | /* That's right, we're using the stack pointer as our frame pointer. */ | |
1104 | set_gdbarch_read_fp (gdbarch, generic_target_read_sp); | |
584f96a8 JB |
1105 | |
1106 | /* Calling functions in the inferior from GDB. */ | |
1107 | set_gdbarch_call_dummy_p (gdbarch, 1); | |
bf4b70a5 JB |
1108 | set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1); |
1109 | set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 0); | |
584f96a8 | 1110 | set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0); |
ad8fe2ce JB |
1111 | set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT); |
1112 | set_gdbarch_call_dummy_address (gdbarch, entry_point_address); | |
1113 | set_gdbarch_call_dummy_words (gdbarch, mn10300_call_dummy_words); | |
1114 | set_gdbarch_sizeof_call_dummy_words (gdbarch, | |
1115 | sizeof (mn10300_call_dummy_words)); | |
1116 | set_gdbarch_call_dummy_length (gdbarch, 0); | |
1117 | set_gdbarch_fix_call_dummy (gdbarch, generic_fix_call_dummy); | |
1118 | set_gdbarch_call_dummy_start_offset (gdbarch, 0); | |
82d983b6 | 1119 | set_gdbarch_pc_in_call_dummy (gdbarch, pc_in_call_dummy_at_entry_point); |
584f96a8 | 1120 | set_gdbarch_use_generic_dummy_frames (gdbarch, 1); |
ad8fe2ce | 1121 | set_gdbarch_push_dummy_frame (gdbarch, generic_push_dummy_frame); |
584f96a8 JB |
1122 | set_gdbarch_push_arguments (gdbarch, mn10300_push_arguments); |
1123 | set_gdbarch_reg_struct_has_addr (gdbarch, mn10300_reg_struct_has_addr); | |
1124 | set_gdbarch_push_return_address (gdbarch, mn10300_push_return_address); | |
1125 | set_gdbarch_save_dummy_frame_tos (gdbarch, generic_save_dummy_frame_tos); | |
ad8fe2ce JB |
1126 | set_gdbarch_use_struct_convention (gdbarch, mn10300_use_struct_convention); |
1127 | ||
91225883 AC |
1128 | tdep->am33_mode = am33_mode; |
1129 | ||
1130 | return gdbarch; | |
1131 | } | |
1132 | ||
c906108c | 1133 | void |
fba45db2 | 1134 | _initialize_mn10300_tdep (void) |
c906108c SS |
1135 | { |
1136 | /* printf("_initialize_mn10300_tdep\n"); */ | |
1137 | ||
1138 | tm_print_insn = print_insn_mn10300; | |
1139 | ||
91225883 | 1140 | register_gdbarch_init (bfd_arch_mn10300, mn10300_gdbarch_init); |
c906108c | 1141 | } |