Commit | Line | Data |
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c906108c | 1 | /* Target-dependent code for the Matsushita MN10300 for GDB, the GNU debugger. |
cda5a58a | 2 | |
51603483 | 3 | Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software |
cda5a58a | 4 | Foundation, Inc. |
c906108c | 5 | |
c5aa993b | 6 | This file is part of GDB. |
c906108c | 7 | |
c5aa993b JM |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
c906108c | 12 | |
c5aa993b JM |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
c906108c | 17 | |
c5aa993b JM |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
22 | |
23 | #include "defs.h" | |
24 | #include "frame.h" | |
25 | #include "inferior.h" | |
c906108c SS |
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 | |
6ca173e3 AC |
35 | #define D0_REGNUM 0 |
36 | #define D2_REGNUM 2 | |
37 | #define D3_REGNUM 3 | |
38 | #define A0_REGNUM 4 | |
39 | #define A2_REGNUM 6 | |
40 | #define A3_REGNUM 7 | |
41 | #define MDR_REGNUM 10 | |
42 | #define PSW_REGNUM 11 | |
43 | #define LIR_REGNUM 12 | |
44 | #define LAR_REGNUM 13 | |
45 | #define MDRQ_REGNUM 14 | |
46 | #define E0_REGNUM 15 | |
47 | #define MCRH_REGNUM 26 | |
48 | #define MCRL_REGNUM 27 | |
49 | #define MCVF_REGNUM 28 | |
50 | ||
51 | enum movm_register_bits { | |
52 | movm_exother_bit = 0x01, | |
53 | movm_exreg1_bit = 0x02, | |
54 | movm_exreg0_bit = 0x04, | |
55 | movm_other_bit = 0x08, | |
56 | movm_a3_bit = 0x10, | |
57 | movm_a2_bit = 0x20, | |
58 | movm_d3_bit = 0x40, | |
59 | movm_d2_bit = 0x80 | |
60 | }; | |
61 | ||
c2c6d25f | 62 | extern void _initialize_mn10300_tdep (void); |
a14ed312 KB |
63 | static CORE_ADDR mn10300_analyze_prologue (struct frame_info *fi, |
64 | CORE_ADDR pc); | |
c906108c | 65 | |
91225883 AC |
66 | /* mn10300 private data */ |
67 | struct gdbarch_tdep | |
68 | { | |
69 | int am33_mode; | |
70 | #define AM33_MODE (gdbarch_tdep (current_gdbarch)->am33_mode) | |
71 | }; | |
72 | ||
c906108c SS |
73 | /* Additional info used by the frame */ |
74 | ||
75 | struct frame_extra_info | |
c5aa993b JM |
76 | { |
77 | int status; | |
78 | int stack_size; | |
79 | }; | |
c906108c | 80 | |
0f71a2f6 | 81 | |
91225883 AC |
82 | static char * |
83 | register_name (int reg, char **regs, long sizeof_regs) | |
c2d11a7d | 84 | { |
91225883 AC |
85 | if (reg < 0 || reg >= sizeof_regs / sizeof (regs[0])) |
86 | return NULL; | |
87 | else | |
88 | return regs[reg]; | |
89 | } | |
90 | ||
fa88f677 | 91 | static const char * |
91225883 | 92 | mn10300_generic_register_name (int reg) |
0f71a2f6 | 93 | { |
91225883 AC |
94 | static char *regs[] = |
95 | { "d0", "d1", "d2", "d3", "a0", "a1", "a2", "a3", | |
96 | "sp", "pc", "mdr", "psw", "lir", "lar", "", "", | |
97 | "", "", "", "", "", "", "", "", | |
98 | "", "", "", "", "", "", "", "fp" | |
99 | }; | |
100 | return register_name (reg, regs, sizeof regs); | |
0f71a2f6 JM |
101 | } |
102 | ||
91225883 | 103 | |
fa88f677 | 104 | static const char * |
91225883 AC |
105 | am33_register_name (int reg) |
106 | { | |
107 | static char *regs[] = | |
108 | { "d0", "d1", "d2", "d3", "a0", "a1", "a2", "a3", | |
109 | "sp", "pc", "mdr", "psw", "lir", "lar", "", | |
110 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
111 | "ssp", "msp", "usp", "mcrh", "mcrl", "mcvf", "", "", "" | |
112 | }; | |
113 | return register_name (reg, regs, sizeof regs); | |
114 | } | |
115 | ||
2ac51b36 | 116 | static CORE_ADDR |
fba45db2 | 117 | mn10300_saved_pc_after_call (struct frame_info *fi) |
0f71a2f6 JM |
118 | { |
119 | return read_memory_integer (read_register (SP_REGNUM), 4); | |
120 | } | |
121 | ||
c064f384 | 122 | static void |
fba45db2 | 123 | mn10300_extract_return_value (struct type *type, char *regbuf, char *valbuf) |
0f71a2f6 JM |
124 | { |
125 | if (TYPE_CODE (type) == TYPE_CODE_PTR) | |
126 | memcpy (valbuf, regbuf + REGISTER_BYTE (4), TYPE_LENGTH (type)); | |
127 | else | |
128 | memcpy (valbuf, regbuf + REGISTER_BYTE (0), TYPE_LENGTH (type)); | |
129 | } | |
130 | ||
2ac51b36 | 131 | static CORE_ADDR |
fba45db2 | 132 | mn10300_extract_struct_value_address (char *regbuf) |
0f71a2f6 JM |
133 | { |
134 | return extract_address (regbuf + REGISTER_BYTE (4), | |
135 | REGISTER_RAW_SIZE (4)); | |
136 | } | |
137 | ||
2ac51b36 | 138 | static void |
fba45db2 | 139 | mn10300_store_return_value (struct type *type, char *valbuf) |
0f71a2f6 JM |
140 | { |
141 | if (TYPE_CODE (type) == TYPE_CODE_PTR) | |
73937e03 AC |
142 | deprecated_write_register_bytes (REGISTER_BYTE (4), valbuf, |
143 | TYPE_LENGTH (type)); | |
0f71a2f6 | 144 | else |
73937e03 AC |
145 | deprecated_write_register_bytes (REGISTER_BYTE (0), valbuf, |
146 | TYPE_LENGTH (type)); | |
0f71a2f6 JM |
147 | } |
148 | ||
a14ed312 | 149 | static struct frame_info *analyze_dummy_frame (CORE_ADDR, CORE_ADDR); |
c906108c | 150 | static struct frame_info * |
fba45db2 | 151 | analyze_dummy_frame (CORE_ADDR pc, CORE_ADDR frame) |
c906108c SS |
152 | { |
153 | static struct frame_info *dummy = NULL; | |
154 | if (dummy == NULL) | |
155 | { | |
156 | dummy = xmalloc (sizeof (struct frame_info)); | |
157 | dummy->saved_regs = xmalloc (SIZEOF_FRAME_SAVED_REGS); | |
158 | dummy->extra_info = xmalloc (sizeof (struct frame_extra_info)); | |
159 | } | |
160 | dummy->next = NULL; | |
161 | dummy->prev = NULL; | |
50abf9e5 | 162 | deprecated_update_frame_pc_hack (dummy, pc); |
c906108c SS |
163 | dummy->frame = frame; |
164 | dummy->extra_info->status = 0; | |
165 | dummy->extra_info->stack_size = 0; | |
b2fb4676 | 166 | memset (get_frame_saved_regs (dummy), '\000', SIZEOF_FRAME_SAVED_REGS); |
c906108c SS |
167 | mn10300_analyze_prologue (dummy, 0); |
168 | return dummy; | |
169 | } | |
170 | ||
171 | /* Values for frame_info.status */ | |
172 | ||
173 | #define MY_FRAME_IN_SP 0x1 | |
174 | #define MY_FRAME_IN_FP 0x2 | |
175 | #define NO_MORE_FRAMES 0x4 | |
176 | ||
177 | ||
178 | /* Should call_function allocate stack space for a struct return? */ | |
2ac51b36 | 179 | static int |
fba45db2 | 180 | mn10300_use_struct_convention (int gcc_p, struct type *type) |
c906108c SS |
181 | { |
182 | return (TYPE_NFIELDS (type) > 1 || TYPE_LENGTH (type) > 8); | |
183 | } | |
184 | ||
185 | /* The breakpoint instruction must be the same size as the smallest | |
186 | instruction in the instruction set. | |
187 | ||
188 | The Matsushita mn10x00 processors have single byte instructions | |
189 | so we need a single byte breakpoint. Matsushita hasn't defined | |
190 | one, so we defined it ourselves. */ | |
191 | ||
f4f9705a | 192 | const static unsigned char * |
fba45db2 | 193 | mn10300_breakpoint_from_pc (CORE_ADDR *bp_addr, int *bp_size) |
c906108c | 194 | { |
c5aa993b JM |
195 | static char breakpoint[] = |
196 | {0xff}; | |
c906108c SS |
197 | *bp_size = 1; |
198 | return breakpoint; | |
199 | } | |
200 | ||
201 | ||
202 | /* Fix fi->frame if it's bogus at this point. This is a helper | |
203 | function for mn10300_analyze_prologue. */ | |
204 | ||
205 | static void | |
fba45db2 | 206 | fix_frame_pointer (struct frame_info *fi, int stack_size) |
c906108c SS |
207 | { |
208 | if (fi && fi->next == NULL) | |
209 | { | |
210 | if (fi->extra_info->status & MY_FRAME_IN_SP) | |
211 | fi->frame = read_sp () - stack_size; | |
212 | else if (fi->extra_info->status & MY_FRAME_IN_FP) | |
213 | fi->frame = read_register (A3_REGNUM); | |
214 | } | |
215 | } | |
216 | ||
217 | ||
218 | /* Set offsets of registers saved by movm instruction. | |
219 | This is a helper function for mn10300_analyze_prologue. */ | |
220 | ||
221 | static void | |
fba45db2 | 222 | set_movm_offsets (struct frame_info *fi, int movm_args) |
c906108c SS |
223 | { |
224 | int offset = 0; | |
225 | ||
226 | if (fi == NULL || movm_args == 0) | |
227 | return; | |
228 | ||
ae83b20d JB |
229 | if (movm_args & movm_other_bit) |
230 | { | |
231 | /* The `other' bit leaves a blank area of four bytes at the | |
232 | beginning of its block of saved registers, making it 32 bytes | |
233 | long in total. */ | |
b2fb4676 AC |
234 | get_frame_saved_regs (fi)[LAR_REGNUM] = fi->frame + offset + 4; |
235 | get_frame_saved_regs (fi)[LIR_REGNUM] = fi->frame + offset + 8; | |
236 | get_frame_saved_regs (fi)[MDR_REGNUM] = fi->frame + offset + 12; | |
237 | get_frame_saved_regs (fi)[A0_REGNUM + 1] = fi->frame + offset + 16; | |
238 | get_frame_saved_regs (fi)[A0_REGNUM] = fi->frame + offset + 20; | |
239 | get_frame_saved_regs (fi)[D0_REGNUM + 1] = fi->frame + offset + 24; | |
240 | get_frame_saved_regs (fi)[D0_REGNUM] = fi->frame + offset + 28; | |
ae83b20d JB |
241 | offset += 32; |
242 | } | |
243 | if (movm_args & movm_a3_bit) | |
c906108c | 244 | { |
b2fb4676 | 245 | get_frame_saved_regs (fi)[A3_REGNUM] = fi->frame + offset; |
c906108c SS |
246 | offset += 4; |
247 | } | |
ae83b20d | 248 | if (movm_args & movm_a2_bit) |
c906108c | 249 | { |
b2fb4676 | 250 | get_frame_saved_regs (fi)[A2_REGNUM] = fi->frame + offset; |
c906108c SS |
251 | offset += 4; |
252 | } | |
ae83b20d | 253 | if (movm_args & movm_d3_bit) |
c906108c | 254 | { |
b2fb4676 | 255 | get_frame_saved_regs (fi)[D3_REGNUM] = fi->frame + offset; |
c906108c SS |
256 | offset += 4; |
257 | } | |
ae83b20d | 258 | if (movm_args & movm_d2_bit) |
c906108c | 259 | { |
b2fb4676 | 260 | get_frame_saved_regs (fi)[D2_REGNUM] = fi->frame + offset; |
c906108c SS |
261 | offset += 4; |
262 | } | |
ae83b20d | 263 | if (AM33_MODE) |
c2d11a7d | 264 | { |
ae83b20d JB |
265 | if (movm_args & movm_exother_bit) |
266 | { | |
b2fb4676 AC |
267 | get_frame_saved_regs (fi)[MCVF_REGNUM] = fi->frame + offset; |
268 | get_frame_saved_regs (fi)[MCRL_REGNUM] = fi->frame + offset + 4; | |
269 | get_frame_saved_regs (fi)[MCRH_REGNUM] = fi->frame + offset + 8; | |
270 | get_frame_saved_regs (fi)[MDRQ_REGNUM] = fi->frame + offset + 12; | |
271 | get_frame_saved_regs (fi)[E0_REGNUM + 1] = fi->frame + offset + 16; | |
272 | get_frame_saved_regs (fi)[E0_REGNUM + 0] = fi->frame + offset + 20; | |
ae83b20d JB |
273 | offset += 24; |
274 | } | |
275 | if (movm_args & movm_exreg1_bit) | |
276 | { | |
b2fb4676 AC |
277 | get_frame_saved_regs (fi)[E0_REGNUM + 7] = fi->frame + offset; |
278 | get_frame_saved_regs (fi)[E0_REGNUM + 6] = fi->frame + offset + 4; | |
279 | get_frame_saved_regs (fi)[E0_REGNUM + 5] = fi->frame + offset + 8; | |
280 | get_frame_saved_regs (fi)[E0_REGNUM + 4] = fi->frame + offset + 12; | |
ae83b20d JB |
281 | offset += 16; |
282 | } | |
283 | if (movm_args & movm_exreg0_bit) | |
284 | { | |
b2fb4676 AC |
285 | get_frame_saved_regs (fi)[E0_REGNUM + 3] = fi->frame + offset; |
286 | get_frame_saved_regs (fi)[E0_REGNUM + 2] = fi->frame + offset + 4; | |
ae83b20d JB |
287 | offset += 8; |
288 | } | |
c2d11a7d | 289 | } |
c906108c SS |
290 | } |
291 | ||
292 | ||
293 | /* The main purpose of this file is dealing with prologues to extract | |
294 | information about stack frames and saved registers. | |
295 | ||
4eab1e18 JB |
296 | In gcc/config/mn13000/mn10300.c, the expand_prologue prologue |
297 | function is pretty readable, and has a nice explanation of how the | |
298 | prologue is generated. The prologues generated by that code will | |
03a0cf8a JB |
299 | have the following form (NOTE: the current code doesn't handle all |
300 | this!): | |
c906108c | 301 | |
4eab1e18 JB |
302 | + If this is an old-style varargs function, then its arguments |
303 | need to be flushed back to the stack: | |
304 | ||
305 | mov d0,(4,sp) | |
306 | mov d1,(4,sp) | |
c906108c | 307 | |
4eab1e18 JB |
308 | + If we use any of the callee-saved registers, save them now. |
309 | ||
310 | movm [some callee-saved registers],(sp) | |
311 | ||
312 | + If we have any floating-point registers to save: | |
313 | ||
314 | - Decrement the stack pointer to reserve space for the registers. | |
315 | If the function doesn't need a frame pointer, we may combine | |
316 | this with the adjustment that reserves space for the frame. | |
317 | ||
318 | add -SIZE, sp | |
319 | ||
320 | - Save the floating-point registers. We have two possible | |
321 | strategies: | |
322 | ||
323 | . Save them at fixed offset from the SP: | |
324 | ||
325 | fmov fsN,(OFFSETN,sp) | |
326 | fmov fsM,(OFFSETM,sp) | |
327 | ... | |
328 | ||
03a0cf8a JB |
329 | Note that, if OFFSETN happens to be zero, you'll get the |
330 | different opcode: fmov fsN,(sp) | |
331 | ||
4eab1e18 JB |
332 | . Or, set a0 to the start of the save area, and then use |
333 | post-increment addressing to save the FP registers. | |
334 | ||
335 | mov sp, a0 | |
336 | add SIZE, a0 | |
337 | fmov fsN,(a0+) | |
338 | fmov fsM,(a0+) | |
339 | ... | |
340 | ||
341 | + If the function needs a frame pointer, we set it here. | |
342 | ||
343 | mov sp, a3 | |
344 | ||
345 | + Now we reserve space for the stack frame proper. This could be | |
346 | merged into the `add -SIZE, sp' instruction for FP saves up | |
347 | above, unless we needed to set the frame pointer in the previous | |
348 | step, or the frame is so large that allocating the whole thing at | |
349 | once would put the FP register save slots out of reach of the | |
350 | addressing mode (128 bytes). | |
351 | ||
352 | add -SIZE, sp | |
c906108c SS |
353 | |
354 | One day we might keep the stack pointer constant, that won't | |
355 | change the code for prologues, but it will make the frame | |
356 | pointerless case much more common. */ | |
c5aa993b | 357 | |
c906108c SS |
358 | /* Analyze the prologue to determine where registers are saved, |
359 | the end of the prologue, etc etc. Return the end of the prologue | |
360 | scanned. | |
361 | ||
362 | We store into FI (if non-null) several tidbits of information: | |
363 | ||
c5aa993b JM |
364 | * stack_size -- size of this stack frame. Note that if we stop in |
365 | certain parts of the prologue/epilogue we may claim the size of the | |
366 | current frame is zero. This happens when the current frame has | |
367 | not been allocated yet or has already been deallocated. | |
c906108c | 368 | |
c5aa993b | 369 | * fsr -- Addresses of registers saved in the stack by this frame. |
c906108c | 370 | |
c5aa993b JM |
371 | * status -- A (relatively) generic status indicator. It's a bitmask |
372 | with the following bits: | |
c906108c | 373 | |
c5aa993b JM |
374 | MY_FRAME_IN_SP: The base of the current frame is actually in |
375 | the stack pointer. This can happen for frame pointerless | |
376 | functions, or cases where we're stopped in the prologue/epilogue | |
377 | itself. For these cases mn10300_analyze_prologue will need up | |
378 | update fi->frame before returning or analyzing the register | |
379 | save instructions. | |
c906108c | 380 | |
c5aa993b | 381 | MY_FRAME_IN_FP: The base of the current frame is in the |
4eab1e18 | 382 | frame pointer register ($a3). |
c906108c | 383 | |
c5aa993b JM |
384 | NO_MORE_FRAMES: Set this if the current frame is "start" or |
385 | if the first instruction looks like mov <imm>,sp. This tells | |
386 | frame chain to not bother trying to unwind past this frame. */ | |
c906108c SS |
387 | |
388 | static CORE_ADDR | |
fba45db2 | 389 | mn10300_analyze_prologue (struct frame_info *fi, CORE_ADDR pc) |
c906108c SS |
390 | { |
391 | CORE_ADDR func_addr, func_end, addr, stop; | |
392 | CORE_ADDR stack_size; | |
393 | int imm_size; | |
394 | unsigned char buf[4]; | |
395 | int status, movm_args = 0; | |
396 | char *name; | |
397 | ||
398 | /* Use the PC in the frame if it's provided to look up the | |
399 | start of this function. */ | |
50abf9e5 | 400 | pc = (fi ? get_frame_pc (fi) : pc); |
c906108c SS |
401 | |
402 | /* Find the start of this function. */ | |
403 | status = find_pc_partial_function (pc, &name, &func_addr, &func_end); | |
404 | ||
405 | /* Do nothing if we couldn't find the start of this function or if we're | |
406 | stopped at the first instruction in the prologue. */ | |
407 | if (status == 0) | |
43ff13b4 JM |
408 | { |
409 | return pc; | |
410 | } | |
c906108c SS |
411 | |
412 | /* If we're in start, then give up. */ | |
413 | if (strcmp (name, "start") == 0) | |
414 | { | |
415 | if (fi != NULL) | |
416 | fi->extra_info->status = NO_MORE_FRAMES; | |
417 | return pc; | |
418 | } | |
419 | ||
420 | /* At the start of a function our frame is in the stack pointer. */ | |
421 | if (fi) | |
422 | fi->extra_info->status = MY_FRAME_IN_SP; | |
423 | ||
424 | /* Get the next two bytes into buf, we need two because rets is a two | |
425 | byte insn and the first isn't enough to uniquely identify it. */ | |
426 | status = read_memory_nobpt (pc, buf, 2); | |
427 | if (status != 0) | |
428 | return pc; | |
429 | ||
430 | /* If we're physically on an "rets" instruction, then our frame has | |
431 | already been deallocated. Note this can also be true for retf | |
432 | and ret if they specify a size of zero. | |
433 | ||
434 | In this case fi->frame is bogus, we need to fix it. */ | |
435 | if (fi && buf[0] == 0xf0 && buf[1] == 0xfc) | |
436 | { | |
437 | if (fi->next == NULL) | |
438 | fi->frame = read_sp (); | |
50abf9e5 | 439 | return get_frame_pc (fi); |
c906108c SS |
440 | } |
441 | ||
442 | /* Similarly if we're stopped on the first insn of a prologue as our | |
443 | frame hasn't been allocated yet. */ | |
50abf9e5 | 444 | if (fi && get_frame_pc (fi) == func_addr) |
c906108c SS |
445 | { |
446 | if (fi->next == NULL) | |
447 | fi->frame = read_sp (); | |
50abf9e5 | 448 | return get_frame_pc (fi); |
c906108c SS |
449 | } |
450 | ||
451 | /* Figure out where to stop scanning. */ | |
50abf9e5 | 452 | stop = fi ? get_frame_pc (fi) : func_end; |
c906108c SS |
453 | |
454 | /* Don't walk off the end of the function. */ | |
455 | stop = stop > func_end ? func_end : stop; | |
456 | ||
457 | /* Start scanning on the first instruction of this function. */ | |
458 | addr = func_addr; | |
459 | ||
460 | /* Suck in two bytes. */ | |
461 | status = read_memory_nobpt (addr, buf, 2); | |
462 | if (status != 0) | |
463 | { | |
464 | fix_frame_pointer (fi, 0); | |
465 | return addr; | |
466 | } | |
467 | ||
4eab1e18 JB |
468 | /* First see if this insn sets the stack pointer from a register; if |
469 | so, it's probably the initialization of the stack pointer in _start, | |
470 | so mark this as the bottom-most frame. */ | |
c906108c SS |
471 | if (buf[0] == 0xf2 && (buf[1] & 0xf3) == 0xf0) |
472 | { | |
473 | if (fi) | |
474 | fi->extra_info->status = NO_MORE_FRAMES; | |
475 | return addr; | |
476 | } | |
477 | ||
478 | /* Now look for movm [regs],sp, which saves the callee saved registers. | |
479 | ||
480 | At this time we don't know if fi->frame is valid, so we only note | |
481 | that we encountered a movm instruction. Later, we'll set the entries | |
482 | in fsr.regs as needed. */ | |
483 | if (buf[0] == 0xcf) | |
484 | { | |
485 | /* Extract the register list for the movm instruction. */ | |
486 | status = read_memory_nobpt (addr + 1, buf, 1); | |
487 | movm_args = *buf; | |
488 | ||
489 | addr += 2; | |
490 | ||
491 | /* Quit now if we're beyond the stop point. */ | |
492 | if (addr >= stop) | |
493 | { | |
494 | /* Fix fi->frame since it's bogus at this point. */ | |
495 | if (fi && fi->next == NULL) | |
496 | fi->frame = read_sp (); | |
497 | ||
498 | /* Note if/where callee saved registers were saved. */ | |
499 | set_movm_offsets (fi, movm_args); | |
500 | return addr; | |
501 | } | |
502 | ||
503 | /* Get the next two bytes so the prologue scan can continue. */ | |
504 | status = read_memory_nobpt (addr, buf, 2); | |
505 | if (status != 0) | |
506 | { | |
507 | /* Fix fi->frame since it's bogus at this point. */ | |
508 | if (fi && fi->next == NULL) | |
509 | fi->frame = read_sp (); | |
510 | ||
511 | /* Note if/where callee saved registers were saved. */ | |
512 | set_movm_offsets (fi, movm_args); | |
513 | return addr; | |
514 | } | |
515 | } | |
516 | ||
517 | /* Now see if we set up a frame pointer via "mov sp,a3" */ | |
518 | if (buf[0] == 0x3f) | |
519 | { | |
520 | addr += 1; | |
521 | ||
522 | /* The frame pointer is now valid. */ | |
523 | if (fi) | |
524 | { | |
525 | fi->extra_info->status |= MY_FRAME_IN_FP; | |
526 | fi->extra_info->status &= ~MY_FRAME_IN_SP; | |
527 | } | |
528 | ||
529 | /* Quit now if we're beyond the stop point. */ | |
530 | if (addr >= stop) | |
531 | { | |
532 | /* Fix fi->frame if it's bogus at this point. */ | |
533 | fix_frame_pointer (fi, 0); | |
534 | ||
535 | /* Note if/where callee saved registers were saved. */ | |
536 | set_movm_offsets (fi, movm_args); | |
537 | return addr; | |
538 | } | |
539 | ||
540 | /* Get two more bytes so scanning can continue. */ | |
541 | status = read_memory_nobpt (addr, buf, 2); | |
542 | if (status != 0) | |
543 | { | |
544 | /* Fix fi->frame if it's bogus at this point. */ | |
545 | fix_frame_pointer (fi, 0); | |
546 | ||
547 | /* Note if/where callee saved registers were saved. */ | |
548 | set_movm_offsets (fi, movm_args); | |
549 | return addr; | |
550 | } | |
551 | } | |
c5aa993b | 552 | |
c906108c SS |
553 | /* Next we should allocate the local frame. No more prologue insns |
554 | are found after allocating the local frame. | |
c5aa993b | 555 | |
c906108c | 556 | Search for add imm8,sp (0xf8feXX) |
c5aa993b JM |
557 | or add imm16,sp (0xfafeXXXX) |
558 | or add imm32,sp (0xfcfeXXXXXXXX). | |
559 | ||
c906108c SS |
560 | If none of the above was found, then this prologue has no |
561 | additional stack. */ | |
562 | ||
563 | status = read_memory_nobpt (addr, buf, 2); | |
564 | if (status != 0) | |
565 | { | |
566 | /* Fix fi->frame if it's bogus at this point. */ | |
567 | fix_frame_pointer (fi, 0); | |
568 | ||
569 | /* Note if/where callee saved registers were saved. */ | |
570 | set_movm_offsets (fi, movm_args); | |
571 | return addr; | |
572 | } | |
573 | ||
574 | imm_size = 0; | |
575 | if (buf[0] == 0xf8 && buf[1] == 0xfe) | |
576 | imm_size = 1; | |
577 | else if (buf[0] == 0xfa && buf[1] == 0xfe) | |
578 | imm_size = 2; | |
579 | else if (buf[0] == 0xfc && buf[1] == 0xfe) | |
580 | imm_size = 4; | |
581 | ||
582 | if (imm_size != 0) | |
583 | { | |
584 | /* Suck in imm_size more bytes, they'll hold the size of the | |
585 | current frame. */ | |
586 | status = read_memory_nobpt (addr + 2, buf, imm_size); | |
587 | if (status != 0) | |
588 | { | |
589 | /* Fix fi->frame if it's bogus at this point. */ | |
590 | fix_frame_pointer (fi, 0); | |
591 | ||
592 | /* Note if/where callee saved registers were saved. */ | |
593 | set_movm_offsets (fi, movm_args); | |
594 | return addr; | |
595 | } | |
596 | ||
597 | /* Note the size of the stack in the frame info structure. */ | |
598 | stack_size = extract_signed_integer (buf, imm_size); | |
599 | if (fi) | |
600 | fi->extra_info->stack_size = stack_size; | |
601 | ||
602 | /* We just consumed 2 + imm_size bytes. */ | |
603 | addr += 2 + imm_size; | |
604 | ||
605 | /* No more prologue insns follow, so begin preparation to return. */ | |
606 | /* Fix fi->frame if it's bogus at this point. */ | |
607 | fix_frame_pointer (fi, stack_size); | |
608 | ||
609 | /* Note if/where callee saved registers were saved. */ | |
610 | set_movm_offsets (fi, movm_args); | |
611 | return addr; | |
612 | } | |
613 | ||
614 | /* We never found an insn which allocates local stack space, regardless | |
615 | this is the end of the prologue. */ | |
616 | /* Fix fi->frame if it's bogus at this point. */ | |
617 | fix_frame_pointer (fi, 0); | |
618 | ||
619 | /* Note if/where callee saved registers were saved. */ | |
620 | set_movm_offsets (fi, movm_args); | |
621 | return addr; | |
622 | } | |
c5aa993b | 623 | |
ae83b20d JB |
624 | |
625 | /* Function: saved_regs_size | |
626 | Return the size in bytes of the register save area, based on the | |
627 | saved_regs array in FI. */ | |
628 | static int | |
629 | saved_regs_size (struct frame_info *fi) | |
630 | { | |
631 | int adjust = 0; | |
632 | int i; | |
633 | ||
634 | /* Reserve four bytes for every register saved. */ | |
635 | for (i = 0; i < NUM_REGS; i++) | |
b2fb4676 | 636 | if (get_frame_saved_regs (fi)[i]) |
ae83b20d JB |
637 | adjust += 4; |
638 | ||
639 | /* If we saved LIR, then it's most likely we used a `movm' | |
640 | instruction with the `other' bit set, in which case the SP is | |
641 | decremented by an extra four bytes, "to simplify calculation | |
642 | of the transfer area", according to the processor manual. */ | |
b2fb4676 | 643 | if (get_frame_saved_regs (fi)[LIR_REGNUM]) |
ae83b20d JB |
644 | adjust += 4; |
645 | ||
646 | return adjust; | |
647 | } | |
648 | ||
649 | ||
c906108c SS |
650 | /* Function: frame_chain |
651 | Figure out and return the caller's frame pointer given current | |
652 | frame_info struct. | |
653 | ||
654 | We don't handle dummy frames yet but we would probably just return the | |
655 | stack pointer that was in use at the time the function call was made? */ | |
656 | ||
2ac51b36 | 657 | static CORE_ADDR |
fba45db2 | 658 | mn10300_frame_chain (struct frame_info *fi) |
c906108c SS |
659 | { |
660 | struct frame_info *dummy; | |
661 | /* Walk through the prologue to determine the stack size, | |
662 | location of saved registers, end of the prologue, etc. */ | |
663 | if (fi->extra_info->status == 0) | |
c5aa993b | 664 | mn10300_analyze_prologue (fi, (CORE_ADDR) 0); |
c906108c SS |
665 | |
666 | /* Quit now if mn10300_analyze_prologue set NO_MORE_FRAMES. */ | |
667 | if (fi->extra_info->status & NO_MORE_FRAMES) | |
668 | return 0; | |
669 | ||
670 | /* Now that we've analyzed our prologue, determine the frame | |
671 | pointer for our caller. | |
672 | ||
c5aa993b JM |
673 | If our caller has a frame pointer, then we need to |
674 | find the entry value of $a3 to our function. | |
675 | ||
676 | If fsr.regs[A3_REGNUM] is nonzero, then it's at the memory | |
677 | location pointed to by fsr.regs[A3_REGNUM]. | |
c906108c | 678 | |
c5aa993b | 679 | Else it's still in $a3. |
c906108c | 680 | |
c5aa993b JM |
681 | If our caller does not have a frame pointer, then his |
682 | frame base is fi->frame + -caller's stack size. */ | |
c906108c | 683 | |
c906108c SS |
684 | /* The easiest way to get that info is to analyze our caller's frame. |
685 | So we set up a dummy frame and call mn10300_analyze_prologue to | |
686 | find stuff for us. */ | |
687 | dummy = analyze_dummy_frame (FRAME_SAVED_PC (fi), fi->frame); | |
688 | ||
689 | if (dummy->extra_info->status & MY_FRAME_IN_FP) | |
690 | { | |
691 | /* Our caller has a frame pointer. So find the frame in $a3 or | |
692 | in the stack. */ | |
b2fb4676 AC |
693 | if (get_frame_saved_regs (fi)[A3_REGNUM]) |
694 | return (read_memory_integer (get_frame_saved_regs (fi)[A3_REGNUM], REGISTER_SIZE)); | |
c906108c SS |
695 | else |
696 | return read_register (A3_REGNUM); | |
697 | } | |
698 | else | |
699 | { | |
ae83b20d | 700 | int adjust = saved_regs_size (fi); |
c906108c SS |
701 | |
702 | /* Our caller does not have a frame pointer. So his frame starts | |
c5aa993b JM |
703 | at the base of our frame (fi->frame) + register save space |
704 | + <his size>. */ | |
c906108c SS |
705 | return fi->frame + adjust + -dummy->extra_info->stack_size; |
706 | } | |
707 | } | |
708 | ||
709 | /* Function: skip_prologue | |
710 | Return the address of the first inst past the prologue of the function. */ | |
711 | ||
2ac51b36 | 712 | static CORE_ADDR |
fba45db2 | 713 | mn10300_skip_prologue (CORE_ADDR pc) |
c906108c SS |
714 | { |
715 | /* We used to check the debug symbols, but that can lose if | |
716 | we have a null prologue. */ | |
717 | return mn10300_analyze_prologue (NULL, pc); | |
718 | } | |
719 | ||
ee9f9641 JB |
720 | /* generic_pop_current_frame calls this function if the current |
721 | frame isn't a dummy frame. */ | |
722 | static void | |
723 | mn10300_pop_frame_regular (struct frame_info *frame) | |
c906108c SS |
724 | { |
725 | int regnum; | |
726 | ||
ee9f9641 | 727 | write_register (PC_REGNUM, FRAME_SAVED_PC (frame)); |
c906108c | 728 | |
ee9f9641 JB |
729 | /* Restore any saved registers. */ |
730 | for (regnum = 0; regnum < NUM_REGS; regnum++) | |
b2fb4676 | 731 | if (get_frame_saved_regs (frame)[regnum] != 0) |
ee9f9641 JB |
732 | { |
733 | ULONGEST value; | |
c906108c | 734 | |
b2fb4676 | 735 | value = read_memory_unsigned_integer (get_frame_saved_regs (frame)[regnum], |
ee9f9641 JB |
736 | REGISTER_RAW_SIZE (regnum)); |
737 | write_register (regnum, value); | |
738 | } | |
c906108c | 739 | |
ee9f9641 | 740 | /* Actually cut back the stack. */ |
c193f6ac | 741 | write_register (SP_REGNUM, get_frame_base (frame)); |
c906108c | 742 | |
ee9f9641 JB |
743 | /* Don't we need to set the PC?!? XXX FIXME. */ |
744 | } | |
745 | ||
746 | /* Function: pop_frame | |
747 | This routine gets called when either the user uses the `return' | |
748 | command, or the call dummy breakpoint gets hit. */ | |
749 | static void | |
750 | mn10300_pop_frame (void) | |
751 | { | |
752 | /* This function checks for and handles generic dummy frames, and | |
753 | calls back to our function for ordinary frames. */ | |
754 | generic_pop_current_frame (mn10300_pop_frame_regular); | |
c906108c SS |
755 | |
756 | /* Throw away any cached frame information. */ | |
757 | flush_cached_frames (); | |
758 | } | |
759 | ||
760 | /* Function: push_arguments | |
761 | Setup arguments for a call to the target. Arguments go in | |
762 | order on the stack. */ | |
763 | ||
2ac51b36 | 764 | static CORE_ADDR |
91225883 AC |
765 | mn10300_push_arguments (int nargs, struct value **args, CORE_ADDR sp, |
766 | int struct_return, CORE_ADDR struct_addr) | |
c906108c SS |
767 | { |
768 | int argnum = 0; | |
769 | int len = 0; | |
770 | int stack_offset = 0; | |
771 | int regsused = struct_return ? 1 : 0; | |
772 | ||
773 | /* This should be a nop, but align the stack just in case something | |
774 | went wrong. Stacks are four byte aligned on the mn10300. */ | |
775 | sp &= ~3; | |
776 | ||
777 | /* Now make space on the stack for the args. | |
778 | ||
779 | XXX This doesn't appear to handle pass-by-invisible reference | |
780 | arguments. */ | |
781 | for (argnum = 0; argnum < nargs; argnum++) | |
782 | { | |
783 | int arg_length = (TYPE_LENGTH (VALUE_TYPE (args[argnum])) + 3) & ~3; | |
784 | ||
785 | while (regsused < 2 && arg_length > 0) | |
786 | { | |
787 | regsused++; | |
788 | arg_length -= 4; | |
789 | } | |
790 | len += arg_length; | |
791 | } | |
792 | ||
793 | /* Allocate stack space. */ | |
794 | sp -= len; | |
795 | ||
796 | regsused = struct_return ? 1 : 0; | |
797 | /* Push all arguments onto the stack. */ | |
798 | for (argnum = 0; argnum < nargs; argnum++) | |
799 | { | |
800 | int len; | |
801 | char *val; | |
802 | ||
803 | /* XXX Check this. What about UNIONS? */ | |
804 | if (TYPE_CODE (VALUE_TYPE (*args)) == TYPE_CODE_STRUCT | |
805 | && TYPE_LENGTH (VALUE_TYPE (*args)) > 8) | |
806 | { | |
807 | /* XXX Wrong, we want a pointer to this argument. */ | |
c5aa993b JM |
808 | len = TYPE_LENGTH (VALUE_TYPE (*args)); |
809 | val = (char *) VALUE_CONTENTS (*args); | |
c906108c SS |
810 | } |
811 | else | |
812 | { | |
813 | len = TYPE_LENGTH (VALUE_TYPE (*args)); | |
c5aa993b | 814 | val = (char *) VALUE_CONTENTS (*args); |
c906108c SS |
815 | } |
816 | ||
817 | while (regsused < 2 && len > 0) | |
818 | { | |
819 | write_register (regsused, extract_unsigned_integer (val, 4)); | |
820 | val += 4; | |
821 | len -= 4; | |
822 | regsused++; | |
823 | } | |
824 | ||
825 | while (len > 0) | |
826 | { | |
827 | write_memory (sp + stack_offset, val, 4); | |
828 | len -= 4; | |
829 | val += 4; | |
830 | stack_offset += 4; | |
831 | } | |
832 | ||
833 | args++; | |
834 | } | |
835 | ||
836 | /* Make space for the flushback area. */ | |
837 | sp -= 8; | |
838 | return sp; | |
839 | } | |
840 | ||
841 | /* Function: push_return_address (pc) | |
842 | Set up the return address for the inferior function call. | |
843 | Needed for targets where we don't actually execute a JSR/BSR instruction */ | |
c5aa993b | 844 | |
2ac51b36 | 845 | static CORE_ADDR |
fba45db2 | 846 | mn10300_push_return_address (CORE_ADDR pc, CORE_ADDR sp) |
c906108c SS |
847 | { |
848 | unsigned char buf[4]; | |
849 | ||
850 | store_unsigned_integer (buf, 4, CALL_DUMMY_ADDRESS ()); | |
851 | write_memory (sp - 4, buf, 4); | |
852 | return sp - 4; | |
853 | } | |
854 | ||
855 | /* Function: store_struct_return (addr,sp) | |
856 | Store the structure value return address for an inferior function | |
857 | call. */ | |
c5aa993b | 858 | |
2ac51b36 | 859 | static void |
fba45db2 | 860 | mn10300_store_struct_return (CORE_ADDR addr, CORE_ADDR sp) |
c906108c SS |
861 | { |
862 | /* The structure return address is passed as the first argument. */ | |
863 | write_register (0, addr); | |
c906108c | 864 | } |
c5aa993b | 865 | |
c906108c SS |
866 | /* Function: frame_saved_pc |
867 | Find the caller of this frame. We do this by seeing if RP_REGNUM | |
868 | is saved in the stack anywhere, otherwise we get it from the | |
869 | registers. If the inner frame is a dummy frame, return its PC | |
870 | instead of RP, because that's where "caller" of the dummy-frame | |
871 | will be found. */ | |
872 | ||
2ac51b36 | 873 | static CORE_ADDR |
fba45db2 | 874 | mn10300_frame_saved_pc (struct frame_info *fi) |
c906108c | 875 | { |
ae83b20d | 876 | int adjust = saved_regs_size (fi); |
c906108c SS |
877 | |
878 | return (read_memory_integer (fi->frame + adjust, REGISTER_SIZE)); | |
879 | } | |
880 | ||
c906108c SS |
881 | /* Function: mn10300_init_extra_frame_info |
882 | Setup the frame's frame pointer, pc, and frame addresses for saved | |
883 | registers. Most of the work is done in mn10300_analyze_prologue(). | |
884 | ||
885 | Note that when we are called for the last frame (currently active frame), | |
50abf9e5 | 886 | that get_frame_pc (fi) and fi->frame will already be setup. However, fi->frame will |
c906108c SS |
887 | be valid only if this routine uses FP. For previous frames, fi-frame will |
888 | always be correct. mn10300_analyze_prologue will fix fi->frame if | |
889 | it's not valid. | |
890 | ||
891 | We can be called with the PC in the call dummy under two circumstances. | |
892 | First, during normal backtracing, second, while figuring out the frame | |
893 | pointer just prior to calling the target function (see run_stack_dummy). */ | |
894 | ||
2ac51b36 | 895 | static void |
ad8fe2ce | 896 | mn10300_init_extra_frame_info (int fromleaf, struct frame_info *fi) |
c906108c SS |
897 | { |
898 | if (fi->next) | |
50abf9e5 | 899 | deprecated_update_frame_pc_hack (fi, FRAME_SAVED_PC (fi->next)); |
c906108c SS |
900 | |
901 | frame_saved_regs_zalloc (fi); | |
902 | fi->extra_info = (struct frame_extra_info *) | |
903 | frame_obstack_alloc (sizeof (struct frame_extra_info)); | |
904 | ||
905 | fi->extra_info->status = 0; | |
906 | fi->extra_info->stack_size = 0; | |
907 | ||
908 | mn10300_analyze_prologue (fi, 0); | |
909 | } | |
910 | ||
ad8fe2ce JB |
911 | |
912 | /* This function's job is handled by init_extra_frame_info. */ | |
2ac51b36 | 913 | static void |
ad8fe2ce JB |
914 | mn10300_frame_init_saved_regs (struct frame_info *frame) |
915 | { | |
916 | } | |
917 | ||
918 | ||
c906108c SS |
919 | /* Function: mn10300_virtual_frame_pointer |
920 | Return the register that the function uses for a frame pointer, | |
921 | plus any necessary offset to be applied to the register before | |
922 | any frame pointer offsets. */ | |
923 | ||
39d4ef09 AC |
924 | static void |
925 | mn10300_virtual_frame_pointer (CORE_ADDR pc, | |
926 | int *reg, | |
927 | LONGEST *offset) | |
c906108c SS |
928 | { |
929 | struct frame_info *dummy = analyze_dummy_frame (pc, 0); | |
930 | /* Set up a dummy frame_info, Analyze the prolog and fill in the | |
931 | extra info. */ | |
932 | /* Results will tell us which type of frame it uses. */ | |
933 | if (dummy->extra_info->status & MY_FRAME_IN_SP) | |
934 | { | |
c5aa993b | 935 | *reg = SP_REGNUM; |
c906108c SS |
936 | *offset = -(dummy->extra_info->stack_size); |
937 | } | |
938 | else | |
939 | { | |
c5aa993b | 940 | *reg = A3_REGNUM; |
c906108c SS |
941 | *offset = 0; |
942 | } | |
943 | } | |
c5aa993b | 944 | |
91225883 AC |
945 | static int |
946 | mn10300_reg_struct_has_addr (int gcc_p, struct type *type) | |
c906108c | 947 | { |
91225883 AC |
948 | return (TYPE_LENGTH (type) > 8); |
949 | } | |
c906108c | 950 | |
f6df245f AC |
951 | static struct type * |
952 | mn10300_register_virtual_type (int reg) | |
953 | { | |
954 | return builtin_type_int; | |
955 | } | |
956 | ||
957 | static int | |
958 | mn10300_register_byte (int reg) | |
959 | { | |
960 | return (reg * 4); | |
961 | } | |
962 | ||
963 | static int | |
964 | mn10300_register_virtual_size (int reg) | |
965 | { | |
966 | return 4; | |
967 | } | |
968 | ||
969 | static int | |
970 | mn10300_register_raw_size (int reg) | |
971 | { | |
972 | return 4; | |
973 | } | |
974 | ||
23436510 JB |
975 | /* If DWARF2 is a register number appearing in Dwarf2 debug info, then |
976 | mn10300_dwarf2_reg_to_regnum (DWARF2) is the corresponding GDB | |
977 | register number. Why don't Dwarf2 and GDB use the same numbering? | |
978 | Who knows? But since people have object files lying around with | |
979 | the existing Dwarf2 numbering, and other people have written stubs | |
980 | to work with the existing GDB, neither of them can change. So we | |
981 | just have to cope. */ | |
982 | static int | |
983 | mn10300_dwarf2_reg_to_regnum (int dwarf2) | |
984 | { | |
985 | /* This table is supposed to be shaped like the REGISTER_NAMES | |
986 | initializer in gcc/config/mn10300/mn10300.h. Registers which | |
987 | appear in GCC's numbering, but have no counterpart in GDB's | |
988 | world, are marked with a -1. */ | |
989 | static int dwarf2_to_gdb[] = { | |
990 | 0, 1, 2, 3, 4, 5, 6, 7, -1, 8, | |
991 | 15, 16, 17, 18, 19, 20, 21, 22 | |
992 | }; | |
993 | int gdb; | |
994 | ||
995 | if (dwarf2 < 0 | |
996 | || dwarf2 >= (sizeof (dwarf2_to_gdb) / sizeof (dwarf2_to_gdb[0])) | |
997 | || dwarf2_to_gdb[dwarf2] == -1) | |
998 | internal_error (__FILE__, __LINE__, | |
999 | "bogus register number in debug info: %d", dwarf2); | |
1000 | ||
1001 | return dwarf2_to_gdb[dwarf2]; | |
1002 | } | |
1003 | ||
f6df245f AC |
1004 | static void |
1005 | mn10300_print_register (const char *name, int regnum, int reg_width) | |
1006 | { | |
1007 | char *raw_buffer = alloca (MAX_REGISTER_RAW_SIZE); | |
1008 | ||
1009 | if (reg_width) | |
1010 | printf_filtered ("%*s: ", reg_width, name); | |
1011 | else | |
1012 | printf_filtered ("%s: ", name); | |
1013 | ||
1014 | /* Get the data */ | |
6e7f8b9c | 1015 | if (!frame_register_read (deprecated_selected_frame, regnum, raw_buffer)) |
f6df245f AC |
1016 | { |
1017 | printf_filtered ("[invalid]"); | |
1018 | return; | |
1019 | } | |
1020 | else | |
1021 | { | |
1022 | int byte; | |
d7449b42 | 1023 | if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) |
f6df245f AC |
1024 | { |
1025 | for (byte = REGISTER_RAW_SIZE (regnum) - REGISTER_VIRTUAL_SIZE (regnum); | |
1026 | byte < REGISTER_RAW_SIZE (regnum); | |
1027 | byte++) | |
1028 | printf_filtered ("%02x", (unsigned char) raw_buffer[byte]); | |
1029 | } | |
1030 | else | |
1031 | { | |
1032 | for (byte = REGISTER_VIRTUAL_SIZE (regnum) - 1; | |
1033 | byte >= 0; | |
1034 | byte--) | |
1035 | printf_filtered ("%02x", (unsigned char) raw_buffer[byte]); | |
1036 | } | |
1037 | } | |
1038 | } | |
1039 | ||
1040 | static void | |
1041 | mn10300_do_registers_info (int regnum, int fpregs) | |
1042 | { | |
1043 | if (regnum >= 0) | |
1044 | { | |
1045 | const char *name = REGISTER_NAME (regnum); | |
1046 | if (name == NULL || name[0] == '\0') | |
1047 | error ("Not a valid register for the current processor type"); | |
1048 | mn10300_print_register (name, regnum, 0); | |
1049 | printf_filtered ("\n"); | |
1050 | } | |
1051 | else | |
1052 | { | |
1053 | /* print registers in an array 4x8 */ | |
1054 | int r; | |
1055 | int reg; | |
1056 | const int nr_in_row = 4; | |
1057 | const int reg_width = 4; | |
1058 | for (r = 0; r < NUM_REGS; r += nr_in_row) | |
1059 | { | |
1060 | int c; | |
1061 | int printing = 0; | |
1062 | int padding = 0; | |
1063 | for (c = r; c < r + nr_in_row; c++) | |
1064 | { | |
1065 | const char *name = REGISTER_NAME (c); | |
1066 | if (name != NULL && *name != '\0') | |
1067 | { | |
1068 | printing = 1; | |
1069 | while (padding > 0) | |
1070 | { | |
1071 | printf_filtered (" "); | |
1072 | padding--; | |
1073 | } | |
1074 | mn10300_print_register (name, c, reg_width); | |
1075 | printf_filtered (" "); | |
1076 | } | |
1077 | else | |
1078 | { | |
1079 | padding += (reg_width + 2 + 8 + 1); | |
1080 | } | |
1081 | } | |
1082 | if (printing) | |
1083 | printf_filtered ("\n"); | |
1084 | } | |
1085 | } | |
1086 | } | |
1087 | ||
91225883 | 1088 | /* Dump out the mn10300 speciic architecture information. */ |
c906108c | 1089 | |
91225883 AC |
1090 | static void |
1091 | mn10300_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file) | |
1092 | { | |
1093 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); | |
1094 | fprintf_unfiltered (file, "mn10300_dump_tdep: am33_mode = %d\n", | |
1095 | tdep->am33_mode); | |
1096 | } | |
c2d11a7d | 1097 | |
91225883 AC |
1098 | static struct gdbarch * |
1099 | mn10300_gdbarch_init (struct gdbarch_info info, | |
1100 | struct gdbarch_list *arches) | |
1101 | { | |
ad8fe2ce | 1102 | static LONGEST mn10300_call_dummy_words[] = { 0 }; |
91225883 AC |
1103 | struct gdbarch *gdbarch; |
1104 | struct gdbarch_tdep *tdep = NULL; | |
1105 | int am33_mode; | |
1106 | gdbarch_register_name_ftype *register_name; | |
1107 | int mach; | |
1108 | int num_regs; | |
1109 | ||
1110 | arches = gdbarch_list_lookup_by_info (arches, &info); | |
1111 | if (arches != NULL) | |
1112 | return arches->gdbarch; | |
1113 | tdep = xmalloc (sizeof (struct gdbarch_tdep)); | |
1114 | gdbarch = gdbarch_alloc (&info, tdep); | |
1115 | ||
1116 | if (info.bfd_arch_info != NULL | |
f6df245f | 1117 | && info.bfd_arch_info->arch == bfd_arch_mn10300) |
91225883 AC |
1118 | mach = info.bfd_arch_info->mach; |
1119 | else | |
1120 | mach = 0; | |
1121 | switch (mach) | |
1122 | { | |
1123 | case 0: | |
f6df245f | 1124 | case bfd_mach_mn10300: |
91225883 AC |
1125 | am33_mode = 0; |
1126 | register_name = mn10300_generic_register_name; | |
1127 | num_regs = 32; | |
1128 | break; | |
1129 | case bfd_mach_am33: | |
c2d11a7d | 1130 | am33_mode = 1; |
91225883 AC |
1131 | register_name = am33_register_name; |
1132 | num_regs = 32; | |
1133 | break; | |
1134 | default: | |
8e65ff28 AC |
1135 | internal_error (__FILE__, __LINE__, |
1136 | "mn10300_gdbarch_init: Unknown mn10300 variant"); | |
91225883 | 1137 | return NULL; /* keep GCC happy. */ |
c2d11a7d | 1138 | } |
c906108c | 1139 | |
584f96a8 JB |
1140 | /* Registers. */ |
1141 | set_gdbarch_num_regs (gdbarch, num_regs); | |
1142 | set_gdbarch_register_name (gdbarch, register_name); | |
f6df245f | 1143 | set_gdbarch_register_size (gdbarch, 4); |
584f96a8 JB |
1144 | set_gdbarch_register_bytes (gdbarch, |
1145 | num_regs * gdbarch_register_size (gdbarch)); | |
f6df245f | 1146 | set_gdbarch_max_register_raw_size (gdbarch, 4); |
584f96a8 | 1147 | set_gdbarch_register_raw_size (gdbarch, mn10300_register_raw_size); |
f6df245f | 1148 | set_gdbarch_register_byte (gdbarch, mn10300_register_byte); |
584f96a8 | 1149 | set_gdbarch_max_register_virtual_size (gdbarch, 4); |
f6df245f | 1150 | set_gdbarch_register_virtual_size (gdbarch, mn10300_register_virtual_size); |
584f96a8 | 1151 | set_gdbarch_register_virtual_type (gdbarch, mn10300_register_virtual_type); |
23436510 | 1152 | set_gdbarch_dwarf2_reg_to_regnum (gdbarch, mn10300_dwarf2_reg_to_regnum); |
903ad3a6 | 1153 | set_gdbarch_deprecated_do_registers_info (gdbarch, mn10300_do_registers_info); |
a15525c1 AC |
1154 | set_gdbarch_sp_regnum (gdbarch, 8); |
1155 | set_gdbarch_pc_regnum (gdbarch, 9); | |
ad8fe2ce | 1156 | set_gdbarch_fp_regnum (gdbarch, 31); |
39d4ef09 | 1157 | set_gdbarch_virtual_frame_pointer (gdbarch, mn10300_virtual_frame_pointer); |
584f96a8 JB |
1158 | |
1159 | /* Breakpoints. */ | |
ad8fe2ce JB |
1160 | set_gdbarch_breakpoint_from_pc (gdbarch, mn10300_breakpoint_from_pc); |
1161 | set_gdbarch_function_start_offset (gdbarch, 0); | |
1162 | set_gdbarch_decr_pc_after_break (gdbarch, 0); | |
584f96a8 JB |
1163 | |
1164 | /* Stack unwinding. */ | |
ad8fe2ce | 1165 | set_gdbarch_inner_than (gdbarch, core_addr_lessthan); |
ad8fe2ce JB |
1166 | set_gdbarch_saved_pc_after_call (gdbarch, mn10300_saved_pc_after_call); |
1167 | set_gdbarch_init_extra_frame_info (gdbarch, mn10300_init_extra_frame_info); | |
a5afb99f | 1168 | set_gdbarch_deprecated_init_frame_pc (gdbarch, init_frame_pc_noop); |
ad8fe2ce JB |
1169 | set_gdbarch_frame_init_saved_regs (gdbarch, mn10300_frame_init_saved_regs); |
1170 | set_gdbarch_frame_chain (gdbarch, mn10300_frame_chain); | |
1171 | set_gdbarch_frame_saved_pc (gdbarch, mn10300_frame_saved_pc); | |
26e9b323 AC |
1172 | set_gdbarch_deprecated_extract_return_value (gdbarch, mn10300_extract_return_value); |
1173 | set_gdbarch_deprecated_extract_struct_value_address | |
ad8fe2ce | 1174 | (gdbarch, mn10300_extract_struct_value_address); |
ebba8386 | 1175 | set_gdbarch_deprecated_store_return_value (gdbarch, mn10300_store_return_value); |
ad8fe2ce | 1176 | set_gdbarch_store_struct_return (gdbarch, mn10300_store_struct_return); |
ee9f9641 | 1177 | set_gdbarch_pop_frame (gdbarch, mn10300_pop_frame); |
ad8fe2ce JB |
1178 | set_gdbarch_skip_prologue (gdbarch, mn10300_skip_prologue); |
1179 | set_gdbarch_frame_args_skip (gdbarch, 0); | |
ad8fe2ce JB |
1180 | set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown); |
1181 | /* That's right, we're using the stack pointer as our frame pointer. */ | |
1182 | set_gdbarch_read_fp (gdbarch, generic_target_read_sp); | |
584f96a8 JB |
1183 | |
1184 | /* Calling functions in the inferior from GDB. */ | |
1185 | set_gdbarch_call_dummy_p (gdbarch, 1); | |
bf4b70a5 JB |
1186 | set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1); |
1187 | set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 0); | |
584f96a8 | 1188 | set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0); |
ad8fe2ce JB |
1189 | set_gdbarch_call_dummy_address (gdbarch, entry_point_address); |
1190 | set_gdbarch_call_dummy_words (gdbarch, mn10300_call_dummy_words); | |
1191 | set_gdbarch_sizeof_call_dummy_words (gdbarch, | |
1192 | sizeof (mn10300_call_dummy_words)); | |
1193 | set_gdbarch_call_dummy_length (gdbarch, 0); | |
1194 | set_gdbarch_fix_call_dummy (gdbarch, generic_fix_call_dummy); | |
1195 | set_gdbarch_call_dummy_start_offset (gdbarch, 0); | |
ae45cd16 | 1196 | set_gdbarch_deprecated_pc_in_call_dummy (gdbarch, deprecated_pc_in_call_dummy_at_entry_point); |
ad8fe2ce | 1197 | set_gdbarch_push_dummy_frame (gdbarch, generic_push_dummy_frame); |
584f96a8 JB |
1198 | set_gdbarch_push_arguments (gdbarch, mn10300_push_arguments); |
1199 | set_gdbarch_reg_struct_has_addr (gdbarch, mn10300_reg_struct_has_addr); | |
1200 | set_gdbarch_push_return_address (gdbarch, mn10300_push_return_address); | |
1201 | set_gdbarch_save_dummy_frame_tos (gdbarch, generic_save_dummy_frame_tos); | |
ad8fe2ce JB |
1202 | set_gdbarch_use_struct_convention (gdbarch, mn10300_use_struct_convention); |
1203 | ||
91225883 AC |
1204 | tdep->am33_mode = am33_mode; |
1205 | ||
1206 | return gdbarch; | |
1207 | } | |
1208 | ||
c906108c | 1209 | void |
fba45db2 | 1210 | _initialize_mn10300_tdep (void) |
c906108c SS |
1211 | { |
1212 | /* printf("_initialize_mn10300_tdep\n"); */ | |
1213 | ||
1214 | tm_print_insn = print_insn_mn10300; | |
1215 | ||
91225883 | 1216 | register_gdbarch_init (bfd_arch_mn10300, mn10300_gdbarch_init); |
c906108c | 1217 | } |