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 | { | |
a00a19e9 | 156 | struct frame_extra_info *extra_info; |
7b5849cc | 157 | CORE_ADDR *saved_regs; |
f6c609c4 | 158 | dummy = deprecated_frame_xmalloc (); |
7b5849cc | 159 | saved_regs = xmalloc (SIZEOF_FRAME_SAVED_REGS); |
7f8ab3a0 | 160 | deprecated_set_frame_saved_regs_hack (dummy, saved_regs); |
a00a19e9 AC |
161 | extra_info = XMALLOC (struct frame_extra_info); |
162 | deprecated_set_frame_extra_info_hack (dummy, extra_info); | |
c906108c | 163 | } |
483d36b2 AC |
164 | deprecated_set_frame_next_hack (dummy, NULL); |
165 | deprecated_set_frame_prev_hack (dummy, NULL); | |
50abf9e5 | 166 | deprecated_update_frame_pc_hack (dummy, pc); |
b0c6b05c | 167 | deprecated_update_frame_base_hack (dummy, frame); |
da50a4b7 AC |
168 | get_frame_extra_info (dummy)->status = 0; |
169 | get_frame_extra_info (dummy)->stack_size = 0; | |
b2fb4676 | 170 | memset (get_frame_saved_regs (dummy), '\000', SIZEOF_FRAME_SAVED_REGS); |
c906108c SS |
171 | mn10300_analyze_prologue (dummy, 0); |
172 | return dummy; | |
173 | } | |
174 | ||
175 | /* Values for frame_info.status */ | |
176 | ||
177 | #define MY_FRAME_IN_SP 0x1 | |
178 | #define MY_FRAME_IN_FP 0x2 | |
179 | #define NO_MORE_FRAMES 0x4 | |
180 | ||
181 | ||
182 | /* Should call_function allocate stack space for a struct return? */ | |
2ac51b36 | 183 | static int |
fba45db2 | 184 | mn10300_use_struct_convention (int gcc_p, struct type *type) |
c906108c SS |
185 | { |
186 | return (TYPE_NFIELDS (type) > 1 || TYPE_LENGTH (type) > 8); | |
187 | } | |
188 | ||
189 | /* The breakpoint instruction must be the same size as the smallest | |
190 | instruction in the instruction set. | |
191 | ||
192 | The Matsushita mn10x00 processors have single byte instructions | |
193 | so we need a single byte breakpoint. Matsushita hasn't defined | |
194 | one, so we defined it ourselves. */ | |
195 | ||
f4f9705a | 196 | const static unsigned char * |
fba45db2 | 197 | mn10300_breakpoint_from_pc (CORE_ADDR *bp_addr, int *bp_size) |
c906108c | 198 | { |
c5aa993b JM |
199 | static char breakpoint[] = |
200 | {0xff}; | |
c906108c SS |
201 | *bp_size = 1; |
202 | return breakpoint; | |
203 | } | |
204 | ||
205 | ||
206 | /* Fix fi->frame if it's bogus at this point. This is a helper | |
207 | function for mn10300_analyze_prologue. */ | |
208 | ||
209 | static void | |
fba45db2 | 210 | fix_frame_pointer (struct frame_info *fi, int stack_size) |
c906108c | 211 | { |
11c02a10 | 212 | if (fi && get_next_frame (fi) == NULL) |
c906108c | 213 | { |
da50a4b7 | 214 | if (get_frame_extra_info (fi)->status & MY_FRAME_IN_SP) |
b0c6b05c | 215 | deprecated_update_frame_base_hack (fi, read_sp () - stack_size); |
da50a4b7 | 216 | else if (get_frame_extra_info (fi)->status & MY_FRAME_IN_FP) |
b0c6b05c | 217 | deprecated_update_frame_base_hack (fi, read_register (A3_REGNUM)); |
c906108c SS |
218 | } |
219 | } | |
220 | ||
221 | ||
222 | /* Set offsets of registers saved by movm instruction. | |
223 | This is a helper function for mn10300_analyze_prologue. */ | |
224 | ||
225 | static void | |
fba45db2 | 226 | set_movm_offsets (struct frame_info *fi, int movm_args) |
c906108c SS |
227 | { |
228 | int offset = 0; | |
229 | ||
230 | if (fi == NULL || movm_args == 0) | |
231 | return; | |
232 | ||
ae83b20d JB |
233 | if (movm_args & movm_other_bit) |
234 | { | |
235 | /* The `other' bit leaves a blank area of four bytes at the | |
236 | beginning of its block of saved registers, making it 32 bytes | |
237 | long in total. */ | |
1e2330ba AC |
238 | get_frame_saved_regs (fi)[LAR_REGNUM] = get_frame_base (fi) + offset + 4; |
239 | get_frame_saved_regs (fi)[LIR_REGNUM] = get_frame_base (fi) + offset + 8; | |
240 | get_frame_saved_regs (fi)[MDR_REGNUM] = get_frame_base (fi) + offset + 12; | |
241 | get_frame_saved_regs (fi)[A0_REGNUM + 1] = get_frame_base (fi) + offset + 16; | |
242 | get_frame_saved_regs (fi)[A0_REGNUM] = get_frame_base (fi) + offset + 20; | |
243 | get_frame_saved_regs (fi)[D0_REGNUM + 1] = get_frame_base (fi) + offset + 24; | |
244 | get_frame_saved_regs (fi)[D0_REGNUM] = get_frame_base (fi) + offset + 28; | |
ae83b20d JB |
245 | offset += 32; |
246 | } | |
247 | if (movm_args & movm_a3_bit) | |
c906108c | 248 | { |
1e2330ba | 249 | get_frame_saved_regs (fi)[A3_REGNUM] = get_frame_base (fi) + offset; |
c906108c SS |
250 | offset += 4; |
251 | } | |
ae83b20d | 252 | if (movm_args & movm_a2_bit) |
c906108c | 253 | { |
1e2330ba | 254 | get_frame_saved_regs (fi)[A2_REGNUM] = get_frame_base (fi) + offset; |
c906108c SS |
255 | offset += 4; |
256 | } | |
ae83b20d | 257 | if (movm_args & movm_d3_bit) |
c906108c | 258 | { |
1e2330ba | 259 | get_frame_saved_regs (fi)[D3_REGNUM] = get_frame_base (fi) + offset; |
c906108c SS |
260 | offset += 4; |
261 | } | |
ae83b20d | 262 | if (movm_args & movm_d2_bit) |
c906108c | 263 | { |
1e2330ba | 264 | get_frame_saved_regs (fi)[D2_REGNUM] = get_frame_base (fi) + offset; |
c906108c SS |
265 | offset += 4; |
266 | } | |
ae83b20d | 267 | if (AM33_MODE) |
c2d11a7d | 268 | { |
ae83b20d JB |
269 | if (movm_args & movm_exother_bit) |
270 | { | |
1e2330ba AC |
271 | get_frame_saved_regs (fi)[MCVF_REGNUM] = get_frame_base (fi) + offset; |
272 | get_frame_saved_regs (fi)[MCRL_REGNUM] = get_frame_base (fi) + offset + 4; | |
273 | get_frame_saved_regs (fi)[MCRH_REGNUM] = get_frame_base (fi) + offset + 8; | |
274 | get_frame_saved_regs (fi)[MDRQ_REGNUM] = get_frame_base (fi) + offset + 12; | |
275 | get_frame_saved_regs (fi)[E0_REGNUM + 1] = get_frame_base (fi) + offset + 16; | |
276 | get_frame_saved_regs (fi)[E0_REGNUM + 0] = get_frame_base (fi) + offset + 20; | |
ae83b20d JB |
277 | offset += 24; |
278 | } | |
279 | if (movm_args & movm_exreg1_bit) | |
280 | { | |
1e2330ba AC |
281 | get_frame_saved_regs (fi)[E0_REGNUM + 7] = get_frame_base (fi) + offset; |
282 | get_frame_saved_regs (fi)[E0_REGNUM + 6] = get_frame_base (fi) + offset + 4; | |
283 | get_frame_saved_regs (fi)[E0_REGNUM + 5] = get_frame_base (fi) + offset + 8; | |
284 | get_frame_saved_regs (fi)[E0_REGNUM + 4] = get_frame_base (fi) + offset + 12; | |
ae83b20d JB |
285 | offset += 16; |
286 | } | |
287 | if (movm_args & movm_exreg0_bit) | |
288 | { | |
1e2330ba AC |
289 | get_frame_saved_regs (fi)[E0_REGNUM + 3] = get_frame_base (fi) + offset; |
290 | get_frame_saved_regs (fi)[E0_REGNUM + 2] = get_frame_base (fi) + offset + 4; | |
ae83b20d JB |
291 | offset += 8; |
292 | } | |
c2d11a7d | 293 | } |
c906108c SS |
294 | } |
295 | ||
296 | ||
297 | /* The main purpose of this file is dealing with prologues to extract | |
298 | information about stack frames and saved registers. | |
299 | ||
4eab1e18 JB |
300 | In gcc/config/mn13000/mn10300.c, the expand_prologue prologue |
301 | function is pretty readable, and has a nice explanation of how the | |
302 | prologue is generated. The prologues generated by that code will | |
03a0cf8a JB |
303 | have the following form (NOTE: the current code doesn't handle all |
304 | this!): | |
c906108c | 305 | |
4eab1e18 JB |
306 | + If this is an old-style varargs function, then its arguments |
307 | need to be flushed back to the stack: | |
308 | ||
309 | mov d0,(4,sp) | |
310 | mov d1,(4,sp) | |
c906108c | 311 | |
4eab1e18 JB |
312 | + If we use any of the callee-saved registers, save them now. |
313 | ||
314 | movm [some callee-saved registers],(sp) | |
315 | ||
316 | + If we have any floating-point registers to save: | |
317 | ||
318 | - Decrement the stack pointer to reserve space for the registers. | |
319 | If the function doesn't need a frame pointer, we may combine | |
320 | this with the adjustment that reserves space for the frame. | |
321 | ||
322 | add -SIZE, sp | |
323 | ||
324 | - Save the floating-point registers. We have two possible | |
325 | strategies: | |
326 | ||
327 | . Save them at fixed offset from the SP: | |
328 | ||
329 | fmov fsN,(OFFSETN,sp) | |
330 | fmov fsM,(OFFSETM,sp) | |
331 | ... | |
332 | ||
03a0cf8a JB |
333 | Note that, if OFFSETN happens to be zero, you'll get the |
334 | different opcode: fmov fsN,(sp) | |
335 | ||
4eab1e18 JB |
336 | . Or, set a0 to the start of the save area, and then use |
337 | post-increment addressing to save the FP registers. | |
338 | ||
339 | mov sp, a0 | |
340 | add SIZE, a0 | |
341 | fmov fsN,(a0+) | |
342 | fmov fsM,(a0+) | |
343 | ... | |
344 | ||
345 | + If the function needs a frame pointer, we set it here. | |
346 | ||
347 | mov sp, a3 | |
348 | ||
349 | + Now we reserve space for the stack frame proper. This could be | |
350 | merged into the `add -SIZE, sp' instruction for FP saves up | |
351 | above, unless we needed to set the frame pointer in the previous | |
352 | step, or the frame is so large that allocating the whole thing at | |
353 | once would put the FP register save slots out of reach of the | |
354 | addressing mode (128 bytes). | |
355 | ||
356 | add -SIZE, sp | |
c906108c SS |
357 | |
358 | One day we might keep the stack pointer constant, that won't | |
359 | change the code for prologues, but it will make the frame | |
360 | pointerless case much more common. */ | |
c5aa993b | 361 | |
c906108c SS |
362 | /* Analyze the prologue to determine where registers are saved, |
363 | the end of the prologue, etc etc. Return the end of the prologue | |
364 | scanned. | |
365 | ||
366 | We store into FI (if non-null) several tidbits of information: | |
367 | ||
c5aa993b JM |
368 | * stack_size -- size of this stack frame. Note that if we stop in |
369 | certain parts of the prologue/epilogue we may claim the size of the | |
370 | current frame is zero. This happens when the current frame has | |
371 | not been allocated yet or has already been deallocated. | |
c906108c | 372 | |
c5aa993b | 373 | * fsr -- Addresses of registers saved in the stack by this frame. |
c906108c | 374 | |
c5aa993b JM |
375 | * status -- A (relatively) generic status indicator. It's a bitmask |
376 | with the following bits: | |
c906108c | 377 | |
c5aa993b JM |
378 | MY_FRAME_IN_SP: The base of the current frame is actually in |
379 | the stack pointer. This can happen for frame pointerless | |
380 | functions, or cases where we're stopped in the prologue/epilogue | |
381 | itself. For these cases mn10300_analyze_prologue will need up | |
382 | update fi->frame before returning or analyzing the register | |
383 | save instructions. | |
c906108c | 384 | |
c5aa993b | 385 | MY_FRAME_IN_FP: The base of the current frame is in the |
4eab1e18 | 386 | frame pointer register ($a3). |
c906108c | 387 | |
c5aa993b JM |
388 | NO_MORE_FRAMES: Set this if the current frame is "start" or |
389 | if the first instruction looks like mov <imm>,sp. This tells | |
390 | frame chain to not bother trying to unwind past this frame. */ | |
c906108c SS |
391 | |
392 | static CORE_ADDR | |
fba45db2 | 393 | mn10300_analyze_prologue (struct frame_info *fi, CORE_ADDR pc) |
c906108c SS |
394 | { |
395 | CORE_ADDR func_addr, func_end, addr, stop; | |
396 | CORE_ADDR stack_size; | |
397 | int imm_size; | |
398 | unsigned char buf[4]; | |
399 | int status, movm_args = 0; | |
400 | char *name; | |
401 | ||
402 | /* Use the PC in the frame if it's provided to look up the | |
403 | start of this function. */ | |
50abf9e5 | 404 | pc = (fi ? get_frame_pc (fi) : pc); |
c906108c SS |
405 | |
406 | /* Find the start of this function. */ | |
407 | status = find_pc_partial_function (pc, &name, &func_addr, &func_end); | |
408 | ||
409 | /* Do nothing if we couldn't find the start of this function or if we're | |
410 | stopped at the first instruction in the prologue. */ | |
411 | if (status == 0) | |
43ff13b4 JM |
412 | { |
413 | return pc; | |
414 | } | |
c906108c SS |
415 | |
416 | /* If we're in start, then give up. */ | |
417 | if (strcmp (name, "start") == 0) | |
418 | { | |
419 | if (fi != NULL) | |
da50a4b7 | 420 | get_frame_extra_info (fi)->status = NO_MORE_FRAMES; |
c906108c SS |
421 | return pc; |
422 | } | |
423 | ||
424 | /* At the start of a function our frame is in the stack pointer. */ | |
425 | if (fi) | |
da50a4b7 | 426 | get_frame_extra_info (fi)->status = MY_FRAME_IN_SP; |
c906108c SS |
427 | |
428 | /* Get the next two bytes into buf, we need two because rets is a two | |
429 | byte insn and the first isn't enough to uniquely identify it. */ | |
430 | status = read_memory_nobpt (pc, buf, 2); | |
431 | if (status != 0) | |
432 | return pc; | |
433 | ||
434 | /* If we're physically on an "rets" instruction, then our frame has | |
435 | already been deallocated. Note this can also be true for retf | |
436 | and ret if they specify a size of zero. | |
437 | ||
438 | In this case fi->frame is bogus, we need to fix it. */ | |
439 | if (fi && buf[0] == 0xf0 && buf[1] == 0xfc) | |
440 | { | |
11c02a10 | 441 | if (get_next_frame (fi) == NULL) |
b0c6b05c | 442 | deprecated_update_frame_base_hack (fi, read_sp ()); |
50abf9e5 | 443 | return get_frame_pc (fi); |
c906108c SS |
444 | } |
445 | ||
446 | /* Similarly if we're stopped on the first insn of a prologue as our | |
447 | frame hasn't been allocated yet. */ | |
50abf9e5 | 448 | if (fi && get_frame_pc (fi) == func_addr) |
c906108c | 449 | { |
11c02a10 | 450 | if (get_next_frame (fi) == NULL) |
b0c6b05c | 451 | deprecated_update_frame_base_hack (fi, read_sp ()); |
50abf9e5 | 452 | return get_frame_pc (fi); |
c906108c SS |
453 | } |
454 | ||
455 | /* Figure out where to stop scanning. */ | |
50abf9e5 | 456 | stop = fi ? get_frame_pc (fi) : func_end; |
c906108c SS |
457 | |
458 | /* Don't walk off the end of the function. */ | |
459 | stop = stop > func_end ? func_end : stop; | |
460 | ||
461 | /* Start scanning on the first instruction of this function. */ | |
462 | addr = func_addr; | |
463 | ||
464 | /* Suck in two bytes. */ | |
465 | status = read_memory_nobpt (addr, buf, 2); | |
466 | if (status != 0) | |
467 | { | |
468 | fix_frame_pointer (fi, 0); | |
469 | return addr; | |
470 | } | |
471 | ||
4eab1e18 JB |
472 | /* First see if this insn sets the stack pointer from a register; if |
473 | so, it's probably the initialization of the stack pointer in _start, | |
474 | so mark this as the bottom-most frame. */ | |
c906108c SS |
475 | if (buf[0] == 0xf2 && (buf[1] & 0xf3) == 0xf0) |
476 | { | |
477 | if (fi) | |
da50a4b7 | 478 | get_frame_extra_info (fi)->status = NO_MORE_FRAMES; |
c906108c SS |
479 | return addr; |
480 | } | |
481 | ||
482 | /* Now look for movm [regs],sp, which saves the callee saved registers. | |
483 | ||
484 | At this time we don't know if fi->frame is valid, so we only note | |
485 | that we encountered a movm instruction. Later, we'll set the entries | |
486 | in fsr.regs as needed. */ | |
487 | if (buf[0] == 0xcf) | |
488 | { | |
489 | /* Extract the register list for the movm instruction. */ | |
490 | status = read_memory_nobpt (addr + 1, buf, 1); | |
491 | movm_args = *buf; | |
492 | ||
493 | addr += 2; | |
494 | ||
495 | /* Quit now if we're beyond the stop point. */ | |
496 | if (addr >= stop) | |
497 | { | |
498 | /* Fix fi->frame since it's bogus at this point. */ | |
11c02a10 | 499 | if (fi && get_next_frame (fi) == NULL) |
b0c6b05c | 500 | deprecated_update_frame_base_hack (fi, read_sp ()); |
c906108c SS |
501 | |
502 | /* Note if/where callee saved registers were saved. */ | |
503 | set_movm_offsets (fi, movm_args); | |
504 | return addr; | |
505 | } | |
506 | ||
507 | /* Get the next two bytes so the prologue scan can continue. */ | |
508 | status = read_memory_nobpt (addr, buf, 2); | |
509 | if (status != 0) | |
510 | { | |
511 | /* Fix fi->frame since it's bogus at this point. */ | |
11c02a10 | 512 | if (fi && get_next_frame (fi) == NULL) |
b0c6b05c | 513 | deprecated_update_frame_base_hack (fi, read_sp ()); |
c906108c SS |
514 | |
515 | /* Note if/where callee saved registers were saved. */ | |
516 | set_movm_offsets (fi, movm_args); | |
517 | return addr; | |
518 | } | |
519 | } | |
520 | ||
521 | /* Now see if we set up a frame pointer via "mov sp,a3" */ | |
522 | if (buf[0] == 0x3f) | |
523 | { | |
524 | addr += 1; | |
525 | ||
526 | /* The frame pointer is now valid. */ | |
527 | if (fi) | |
528 | { | |
da50a4b7 AC |
529 | get_frame_extra_info (fi)->status |= MY_FRAME_IN_FP; |
530 | get_frame_extra_info (fi)->status &= ~MY_FRAME_IN_SP; | |
c906108c SS |
531 | } |
532 | ||
533 | /* Quit now if we're beyond the stop point. */ | |
534 | if (addr >= stop) | |
535 | { | |
536 | /* Fix fi->frame if it's bogus at this point. */ | |
537 | fix_frame_pointer (fi, 0); | |
538 | ||
539 | /* Note if/where callee saved registers were saved. */ | |
540 | set_movm_offsets (fi, movm_args); | |
541 | return addr; | |
542 | } | |
543 | ||
544 | /* Get two more bytes so scanning can continue. */ | |
545 | status = read_memory_nobpt (addr, buf, 2); | |
546 | if (status != 0) | |
547 | { | |
548 | /* Fix fi->frame if it's bogus at this point. */ | |
549 | fix_frame_pointer (fi, 0); | |
550 | ||
551 | /* Note if/where callee saved registers were saved. */ | |
552 | set_movm_offsets (fi, movm_args); | |
553 | return addr; | |
554 | } | |
555 | } | |
c5aa993b | 556 | |
c906108c SS |
557 | /* Next we should allocate the local frame. No more prologue insns |
558 | are found after allocating the local frame. | |
c5aa993b | 559 | |
c906108c | 560 | Search for add imm8,sp (0xf8feXX) |
c5aa993b JM |
561 | or add imm16,sp (0xfafeXXXX) |
562 | or add imm32,sp (0xfcfeXXXXXXXX). | |
563 | ||
c906108c SS |
564 | If none of the above was found, then this prologue has no |
565 | additional stack. */ | |
566 | ||
567 | status = read_memory_nobpt (addr, buf, 2); | |
568 | if (status != 0) | |
569 | { | |
570 | /* Fix fi->frame if it's bogus at this point. */ | |
571 | fix_frame_pointer (fi, 0); | |
572 | ||
573 | /* Note if/where callee saved registers were saved. */ | |
574 | set_movm_offsets (fi, movm_args); | |
575 | return addr; | |
576 | } | |
577 | ||
578 | imm_size = 0; | |
579 | if (buf[0] == 0xf8 && buf[1] == 0xfe) | |
580 | imm_size = 1; | |
581 | else if (buf[0] == 0xfa && buf[1] == 0xfe) | |
582 | imm_size = 2; | |
583 | else if (buf[0] == 0xfc && buf[1] == 0xfe) | |
584 | imm_size = 4; | |
585 | ||
586 | if (imm_size != 0) | |
587 | { | |
588 | /* Suck in imm_size more bytes, they'll hold the size of the | |
589 | current frame. */ | |
590 | status = read_memory_nobpt (addr + 2, buf, imm_size); | |
591 | if (status != 0) | |
592 | { | |
593 | /* Fix fi->frame if it's bogus at this point. */ | |
594 | fix_frame_pointer (fi, 0); | |
595 | ||
596 | /* Note if/where callee saved registers were saved. */ | |
597 | set_movm_offsets (fi, movm_args); | |
598 | return addr; | |
599 | } | |
600 | ||
601 | /* Note the size of the stack in the frame info structure. */ | |
602 | stack_size = extract_signed_integer (buf, imm_size); | |
603 | if (fi) | |
da50a4b7 | 604 | get_frame_extra_info (fi)->stack_size = stack_size; |
c906108c SS |
605 | |
606 | /* We just consumed 2 + imm_size bytes. */ | |
607 | addr += 2 + imm_size; | |
608 | ||
609 | /* No more prologue insns follow, so begin preparation to return. */ | |
610 | /* Fix fi->frame if it's bogus at this point. */ | |
611 | fix_frame_pointer (fi, stack_size); | |
612 | ||
613 | /* Note if/where callee saved registers were saved. */ | |
614 | set_movm_offsets (fi, movm_args); | |
615 | return addr; | |
616 | } | |
617 | ||
618 | /* We never found an insn which allocates local stack space, regardless | |
619 | this is the end of the prologue. */ | |
620 | /* Fix fi->frame if it's bogus at this point. */ | |
621 | fix_frame_pointer (fi, 0); | |
622 | ||
623 | /* Note if/where callee saved registers were saved. */ | |
624 | set_movm_offsets (fi, movm_args); | |
625 | return addr; | |
626 | } | |
c5aa993b | 627 | |
ae83b20d JB |
628 | |
629 | /* Function: saved_regs_size | |
630 | Return the size in bytes of the register save area, based on the | |
631 | saved_regs array in FI. */ | |
632 | static int | |
633 | saved_regs_size (struct frame_info *fi) | |
634 | { | |
635 | int adjust = 0; | |
636 | int i; | |
637 | ||
638 | /* Reserve four bytes for every register saved. */ | |
639 | for (i = 0; i < NUM_REGS; i++) | |
b2fb4676 | 640 | if (get_frame_saved_regs (fi)[i]) |
ae83b20d JB |
641 | adjust += 4; |
642 | ||
643 | /* If we saved LIR, then it's most likely we used a `movm' | |
644 | instruction with the `other' bit set, in which case the SP is | |
645 | decremented by an extra four bytes, "to simplify calculation | |
646 | of the transfer area", according to the processor manual. */ | |
b2fb4676 | 647 | if (get_frame_saved_regs (fi)[LIR_REGNUM]) |
ae83b20d JB |
648 | adjust += 4; |
649 | ||
650 | return adjust; | |
651 | } | |
652 | ||
653 | ||
c906108c SS |
654 | /* Function: frame_chain |
655 | Figure out and return the caller's frame pointer given current | |
656 | frame_info struct. | |
657 | ||
658 | We don't handle dummy frames yet but we would probably just return the | |
659 | stack pointer that was in use at the time the function call was made? */ | |
660 | ||
2ac51b36 | 661 | static CORE_ADDR |
fba45db2 | 662 | mn10300_frame_chain (struct frame_info *fi) |
c906108c SS |
663 | { |
664 | struct frame_info *dummy; | |
665 | /* Walk through the prologue to determine the stack size, | |
666 | location of saved registers, end of the prologue, etc. */ | |
da50a4b7 | 667 | if (get_frame_extra_info (fi)->status == 0) |
c5aa993b | 668 | mn10300_analyze_prologue (fi, (CORE_ADDR) 0); |
c906108c SS |
669 | |
670 | /* Quit now if mn10300_analyze_prologue set NO_MORE_FRAMES. */ | |
da50a4b7 | 671 | if (get_frame_extra_info (fi)->status & NO_MORE_FRAMES) |
c906108c SS |
672 | return 0; |
673 | ||
674 | /* Now that we've analyzed our prologue, determine the frame | |
675 | pointer for our caller. | |
676 | ||
c5aa993b JM |
677 | If our caller has a frame pointer, then we need to |
678 | find the entry value of $a3 to our function. | |
679 | ||
680 | If fsr.regs[A3_REGNUM] is nonzero, then it's at the memory | |
681 | location pointed to by fsr.regs[A3_REGNUM]. | |
c906108c | 682 | |
c5aa993b | 683 | Else it's still in $a3. |
c906108c | 684 | |
c5aa993b JM |
685 | If our caller does not have a frame pointer, then his |
686 | frame base is fi->frame + -caller's stack size. */ | |
c906108c | 687 | |
c906108c SS |
688 | /* The easiest way to get that info is to analyze our caller's frame. |
689 | So we set up a dummy frame and call mn10300_analyze_prologue to | |
690 | find stuff for us. */ | |
8bedc050 | 691 | dummy = analyze_dummy_frame (DEPRECATED_FRAME_SAVED_PC (fi), get_frame_base (fi)); |
c906108c | 692 | |
da50a4b7 | 693 | if (get_frame_extra_info (dummy)->status & MY_FRAME_IN_FP) |
c906108c SS |
694 | { |
695 | /* Our caller has a frame pointer. So find the frame in $a3 or | |
696 | in the stack. */ | |
b2fb4676 AC |
697 | if (get_frame_saved_regs (fi)[A3_REGNUM]) |
698 | return (read_memory_integer (get_frame_saved_regs (fi)[A3_REGNUM], REGISTER_SIZE)); | |
c906108c SS |
699 | else |
700 | return read_register (A3_REGNUM); | |
701 | } | |
702 | else | |
703 | { | |
ae83b20d | 704 | int adjust = saved_regs_size (fi); |
c906108c SS |
705 | |
706 | /* Our caller does not have a frame pointer. So his frame starts | |
c5aa993b JM |
707 | at the base of our frame (fi->frame) + register save space |
708 | + <his size>. */ | |
da50a4b7 | 709 | return get_frame_base (fi) + adjust + -get_frame_extra_info (dummy)->stack_size; |
c906108c SS |
710 | } |
711 | } | |
712 | ||
713 | /* Function: skip_prologue | |
714 | Return the address of the first inst past the prologue of the function. */ | |
715 | ||
2ac51b36 | 716 | static CORE_ADDR |
fba45db2 | 717 | mn10300_skip_prologue (CORE_ADDR pc) |
c906108c SS |
718 | { |
719 | /* We used to check the debug symbols, but that can lose if | |
720 | we have a null prologue. */ | |
721 | return mn10300_analyze_prologue (NULL, pc); | |
722 | } | |
723 | ||
ee9f9641 JB |
724 | /* generic_pop_current_frame calls this function if the current |
725 | frame isn't a dummy frame. */ | |
726 | static void | |
727 | mn10300_pop_frame_regular (struct frame_info *frame) | |
c906108c SS |
728 | { |
729 | int regnum; | |
730 | ||
8bedc050 | 731 | write_register (PC_REGNUM, DEPRECATED_FRAME_SAVED_PC (frame)); |
c906108c | 732 | |
ee9f9641 JB |
733 | /* Restore any saved registers. */ |
734 | for (regnum = 0; regnum < NUM_REGS; regnum++) | |
b2fb4676 | 735 | if (get_frame_saved_regs (frame)[regnum] != 0) |
ee9f9641 JB |
736 | { |
737 | ULONGEST value; | |
c906108c | 738 | |
b2fb4676 | 739 | value = read_memory_unsigned_integer (get_frame_saved_regs (frame)[regnum], |
ee9f9641 JB |
740 | REGISTER_RAW_SIZE (regnum)); |
741 | write_register (regnum, value); | |
742 | } | |
c906108c | 743 | |
ee9f9641 | 744 | /* Actually cut back the stack. */ |
c193f6ac | 745 | write_register (SP_REGNUM, get_frame_base (frame)); |
c906108c | 746 | |
ee9f9641 JB |
747 | /* Don't we need to set the PC?!? XXX FIXME. */ |
748 | } | |
749 | ||
750 | /* Function: pop_frame | |
751 | This routine gets called when either the user uses the `return' | |
752 | command, or the call dummy breakpoint gets hit. */ | |
753 | static void | |
754 | mn10300_pop_frame (void) | |
755 | { | |
756 | /* This function checks for and handles generic dummy frames, and | |
757 | calls back to our function for ordinary frames. */ | |
758 | generic_pop_current_frame (mn10300_pop_frame_regular); | |
c906108c SS |
759 | |
760 | /* Throw away any cached frame information. */ | |
761 | flush_cached_frames (); | |
762 | } | |
763 | ||
764 | /* Function: push_arguments | |
765 | Setup arguments for a call to the target. Arguments go in | |
766 | order on the stack. */ | |
767 | ||
2ac51b36 | 768 | static CORE_ADDR |
91225883 AC |
769 | mn10300_push_arguments (int nargs, struct value **args, CORE_ADDR sp, |
770 | int struct_return, CORE_ADDR struct_addr) | |
c906108c SS |
771 | { |
772 | int argnum = 0; | |
773 | int len = 0; | |
774 | int stack_offset = 0; | |
775 | int regsused = struct_return ? 1 : 0; | |
776 | ||
777 | /* This should be a nop, but align the stack just in case something | |
778 | went wrong. Stacks are four byte aligned on the mn10300. */ | |
779 | sp &= ~3; | |
780 | ||
781 | /* Now make space on the stack for the args. | |
782 | ||
783 | XXX This doesn't appear to handle pass-by-invisible reference | |
784 | arguments. */ | |
785 | for (argnum = 0; argnum < nargs; argnum++) | |
786 | { | |
787 | int arg_length = (TYPE_LENGTH (VALUE_TYPE (args[argnum])) + 3) & ~3; | |
788 | ||
789 | while (regsused < 2 && arg_length > 0) | |
790 | { | |
791 | regsused++; | |
792 | arg_length -= 4; | |
793 | } | |
794 | len += arg_length; | |
795 | } | |
796 | ||
797 | /* Allocate stack space. */ | |
798 | sp -= len; | |
799 | ||
800 | regsused = struct_return ? 1 : 0; | |
801 | /* Push all arguments onto the stack. */ | |
802 | for (argnum = 0; argnum < nargs; argnum++) | |
803 | { | |
804 | int len; | |
805 | char *val; | |
806 | ||
807 | /* XXX Check this. What about UNIONS? */ | |
808 | if (TYPE_CODE (VALUE_TYPE (*args)) == TYPE_CODE_STRUCT | |
809 | && TYPE_LENGTH (VALUE_TYPE (*args)) > 8) | |
810 | { | |
811 | /* XXX Wrong, we want a pointer to this argument. */ | |
c5aa993b JM |
812 | len = TYPE_LENGTH (VALUE_TYPE (*args)); |
813 | val = (char *) VALUE_CONTENTS (*args); | |
c906108c SS |
814 | } |
815 | else | |
816 | { | |
817 | len = TYPE_LENGTH (VALUE_TYPE (*args)); | |
c5aa993b | 818 | val = (char *) VALUE_CONTENTS (*args); |
c906108c SS |
819 | } |
820 | ||
821 | while (regsused < 2 && len > 0) | |
822 | { | |
823 | write_register (regsused, extract_unsigned_integer (val, 4)); | |
824 | val += 4; | |
825 | len -= 4; | |
826 | regsused++; | |
827 | } | |
828 | ||
829 | while (len > 0) | |
830 | { | |
831 | write_memory (sp + stack_offset, val, 4); | |
832 | len -= 4; | |
833 | val += 4; | |
834 | stack_offset += 4; | |
835 | } | |
836 | ||
837 | args++; | |
838 | } | |
839 | ||
840 | /* Make space for the flushback area. */ | |
841 | sp -= 8; | |
842 | return sp; | |
843 | } | |
844 | ||
845 | /* Function: push_return_address (pc) | |
846 | Set up the return address for the inferior function call. | |
847 | Needed for targets where we don't actually execute a JSR/BSR instruction */ | |
c5aa993b | 848 | |
2ac51b36 | 849 | static CORE_ADDR |
fba45db2 | 850 | mn10300_push_return_address (CORE_ADDR pc, CORE_ADDR sp) |
c906108c SS |
851 | { |
852 | unsigned char buf[4]; | |
853 | ||
854 | store_unsigned_integer (buf, 4, CALL_DUMMY_ADDRESS ()); | |
855 | write_memory (sp - 4, buf, 4); | |
856 | return sp - 4; | |
857 | } | |
858 | ||
859 | /* Function: store_struct_return (addr,sp) | |
860 | Store the structure value return address for an inferior function | |
861 | call. */ | |
c5aa993b | 862 | |
2ac51b36 | 863 | static void |
fba45db2 | 864 | mn10300_store_struct_return (CORE_ADDR addr, CORE_ADDR sp) |
c906108c SS |
865 | { |
866 | /* The structure return address is passed as the first argument. */ | |
867 | write_register (0, addr); | |
c906108c | 868 | } |
c5aa993b | 869 | |
c906108c SS |
870 | /* Function: frame_saved_pc |
871 | Find the caller of this frame. We do this by seeing if RP_REGNUM | |
872 | is saved in the stack anywhere, otherwise we get it from the | |
873 | registers. If the inner frame is a dummy frame, return its PC | |
874 | instead of RP, because that's where "caller" of the dummy-frame | |
875 | will be found. */ | |
876 | ||
2ac51b36 | 877 | static CORE_ADDR |
fba45db2 | 878 | mn10300_frame_saved_pc (struct frame_info *fi) |
c906108c | 879 | { |
ae83b20d | 880 | int adjust = saved_regs_size (fi); |
c906108c | 881 | |
1e2330ba | 882 | return (read_memory_integer (get_frame_base (fi) + adjust, REGISTER_SIZE)); |
c906108c SS |
883 | } |
884 | ||
c906108c SS |
885 | /* Function: mn10300_init_extra_frame_info |
886 | Setup the frame's frame pointer, pc, and frame addresses for saved | |
887 | registers. Most of the work is done in mn10300_analyze_prologue(). | |
888 | ||
889 | Note that when we are called for the last frame (currently active frame), | |
50abf9e5 | 890 | that get_frame_pc (fi) and fi->frame will already be setup. However, fi->frame will |
c906108c SS |
891 | be valid only if this routine uses FP. For previous frames, fi-frame will |
892 | always be correct. mn10300_analyze_prologue will fix fi->frame if | |
893 | it's not valid. | |
894 | ||
895 | We can be called with the PC in the call dummy under two circumstances. | |
896 | First, during normal backtracing, second, while figuring out the frame | |
897 | pointer just prior to calling the target function (see run_stack_dummy). */ | |
898 | ||
2ac51b36 | 899 | static void |
ad8fe2ce | 900 | mn10300_init_extra_frame_info (int fromleaf, struct frame_info *fi) |
c906108c | 901 | { |
11c02a10 | 902 | if (get_next_frame (fi)) |
8bedc050 | 903 | deprecated_update_frame_pc_hack (fi, DEPRECATED_FRAME_SAVED_PC (get_next_frame (fi))); |
c906108c SS |
904 | |
905 | frame_saved_regs_zalloc (fi); | |
a00a19e9 | 906 | frame_extra_info_zalloc (fi, sizeof (struct frame_extra_info)); |
c906108c | 907 | |
da50a4b7 AC |
908 | get_frame_extra_info (fi)->status = 0; |
909 | get_frame_extra_info (fi)->stack_size = 0; | |
c906108c SS |
910 | |
911 | mn10300_analyze_prologue (fi, 0); | |
912 | } | |
913 | ||
ad8fe2ce JB |
914 | |
915 | /* This function's job is handled by init_extra_frame_info. */ | |
2ac51b36 | 916 | static void |
ad8fe2ce JB |
917 | mn10300_frame_init_saved_regs (struct frame_info *frame) |
918 | { | |
919 | } | |
920 | ||
921 | ||
c906108c SS |
922 | /* Function: mn10300_virtual_frame_pointer |
923 | Return the register that the function uses for a frame pointer, | |
924 | plus any necessary offset to be applied to the register before | |
925 | any frame pointer offsets. */ | |
926 | ||
39d4ef09 AC |
927 | static void |
928 | mn10300_virtual_frame_pointer (CORE_ADDR pc, | |
929 | int *reg, | |
930 | LONGEST *offset) | |
c906108c SS |
931 | { |
932 | struct frame_info *dummy = analyze_dummy_frame (pc, 0); | |
933 | /* Set up a dummy frame_info, Analyze the prolog and fill in the | |
934 | extra info. */ | |
935 | /* Results will tell us which type of frame it uses. */ | |
da50a4b7 | 936 | if (get_frame_extra_info (dummy)->status & MY_FRAME_IN_SP) |
c906108c | 937 | { |
c5aa993b | 938 | *reg = SP_REGNUM; |
da50a4b7 | 939 | *offset = -(get_frame_extra_info (dummy)->stack_size); |
c906108c SS |
940 | } |
941 | else | |
942 | { | |
c5aa993b | 943 | *reg = A3_REGNUM; |
c906108c SS |
944 | *offset = 0; |
945 | } | |
946 | } | |
c5aa993b | 947 | |
91225883 AC |
948 | static int |
949 | mn10300_reg_struct_has_addr (int gcc_p, struct type *type) | |
c906108c | 950 | { |
91225883 AC |
951 | return (TYPE_LENGTH (type) > 8); |
952 | } | |
c906108c | 953 | |
f6df245f AC |
954 | static struct type * |
955 | mn10300_register_virtual_type (int reg) | |
956 | { | |
957 | return builtin_type_int; | |
958 | } | |
959 | ||
960 | static int | |
961 | mn10300_register_byte (int reg) | |
962 | { | |
963 | return (reg * 4); | |
964 | } | |
965 | ||
966 | static int | |
967 | mn10300_register_virtual_size (int reg) | |
968 | { | |
969 | return 4; | |
970 | } | |
971 | ||
972 | static int | |
973 | mn10300_register_raw_size (int reg) | |
974 | { | |
975 | return 4; | |
976 | } | |
977 | ||
23436510 JB |
978 | /* If DWARF2 is a register number appearing in Dwarf2 debug info, then |
979 | mn10300_dwarf2_reg_to_regnum (DWARF2) is the corresponding GDB | |
980 | register number. Why don't Dwarf2 and GDB use the same numbering? | |
981 | Who knows? But since people have object files lying around with | |
982 | the existing Dwarf2 numbering, and other people have written stubs | |
983 | to work with the existing GDB, neither of them can change. So we | |
984 | just have to cope. */ | |
985 | static int | |
986 | mn10300_dwarf2_reg_to_regnum (int dwarf2) | |
987 | { | |
988 | /* This table is supposed to be shaped like the REGISTER_NAMES | |
989 | initializer in gcc/config/mn10300/mn10300.h. Registers which | |
990 | appear in GCC's numbering, but have no counterpart in GDB's | |
991 | world, are marked with a -1. */ | |
992 | static int dwarf2_to_gdb[] = { | |
993 | 0, 1, 2, 3, 4, 5, 6, 7, -1, 8, | |
994 | 15, 16, 17, 18, 19, 20, 21, 22 | |
995 | }; | |
996 | int gdb; | |
997 | ||
998 | if (dwarf2 < 0 | |
999 | || dwarf2 >= (sizeof (dwarf2_to_gdb) / sizeof (dwarf2_to_gdb[0])) | |
1000 | || dwarf2_to_gdb[dwarf2] == -1) | |
1001 | internal_error (__FILE__, __LINE__, | |
1002 | "bogus register number in debug info: %d", dwarf2); | |
1003 | ||
1004 | return dwarf2_to_gdb[dwarf2]; | |
1005 | } | |
1006 | ||
f6df245f AC |
1007 | static void |
1008 | mn10300_print_register (const char *name, int regnum, int reg_width) | |
1009 | { | |
1010 | char *raw_buffer = alloca (MAX_REGISTER_RAW_SIZE); | |
1011 | ||
1012 | if (reg_width) | |
1013 | printf_filtered ("%*s: ", reg_width, name); | |
1014 | else | |
1015 | printf_filtered ("%s: ", name); | |
1016 | ||
1017 | /* Get the data */ | |
6e7f8b9c | 1018 | if (!frame_register_read (deprecated_selected_frame, regnum, raw_buffer)) |
f6df245f AC |
1019 | { |
1020 | printf_filtered ("[invalid]"); | |
1021 | return; | |
1022 | } | |
1023 | else | |
1024 | { | |
1025 | int byte; | |
d7449b42 | 1026 | if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) |
f6df245f AC |
1027 | { |
1028 | for (byte = REGISTER_RAW_SIZE (regnum) - REGISTER_VIRTUAL_SIZE (regnum); | |
1029 | byte < REGISTER_RAW_SIZE (regnum); | |
1030 | byte++) | |
1031 | printf_filtered ("%02x", (unsigned char) raw_buffer[byte]); | |
1032 | } | |
1033 | else | |
1034 | { | |
1035 | for (byte = REGISTER_VIRTUAL_SIZE (regnum) - 1; | |
1036 | byte >= 0; | |
1037 | byte--) | |
1038 | printf_filtered ("%02x", (unsigned char) raw_buffer[byte]); | |
1039 | } | |
1040 | } | |
1041 | } | |
1042 | ||
1043 | static void | |
1044 | mn10300_do_registers_info (int regnum, int fpregs) | |
1045 | { | |
1046 | if (regnum >= 0) | |
1047 | { | |
1048 | const char *name = REGISTER_NAME (regnum); | |
1049 | if (name == NULL || name[0] == '\0') | |
1050 | error ("Not a valid register for the current processor type"); | |
1051 | mn10300_print_register (name, regnum, 0); | |
1052 | printf_filtered ("\n"); | |
1053 | } | |
1054 | else | |
1055 | { | |
1056 | /* print registers in an array 4x8 */ | |
1057 | int r; | |
1058 | int reg; | |
1059 | const int nr_in_row = 4; | |
1060 | const int reg_width = 4; | |
1061 | for (r = 0; r < NUM_REGS; r += nr_in_row) | |
1062 | { | |
1063 | int c; | |
1064 | int printing = 0; | |
1065 | int padding = 0; | |
1066 | for (c = r; c < r + nr_in_row; c++) | |
1067 | { | |
1068 | const char *name = REGISTER_NAME (c); | |
1069 | if (name != NULL && *name != '\0') | |
1070 | { | |
1071 | printing = 1; | |
1072 | while (padding > 0) | |
1073 | { | |
1074 | printf_filtered (" "); | |
1075 | padding--; | |
1076 | } | |
1077 | mn10300_print_register (name, c, reg_width); | |
1078 | printf_filtered (" "); | |
1079 | } | |
1080 | else | |
1081 | { | |
1082 | padding += (reg_width + 2 + 8 + 1); | |
1083 | } | |
1084 | } | |
1085 | if (printing) | |
1086 | printf_filtered ("\n"); | |
1087 | } | |
1088 | } | |
1089 | } | |
1090 | ||
91225883 | 1091 | /* Dump out the mn10300 speciic architecture information. */ |
c906108c | 1092 | |
91225883 AC |
1093 | static void |
1094 | mn10300_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file) | |
1095 | { | |
1096 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); | |
1097 | fprintf_unfiltered (file, "mn10300_dump_tdep: am33_mode = %d\n", | |
1098 | tdep->am33_mode); | |
1099 | } | |
c2d11a7d | 1100 | |
91225883 AC |
1101 | static struct gdbarch * |
1102 | mn10300_gdbarch_init (struct gdbarch_info info, | |
1103 | struct gdbarch_list *arches) | |
1104 | { | |
ad8fe2ce | 1105 | static LONGEST mn10300_call_dummy_words[] = { 0 }; |
91225883 AC |
1106 | struct gdbarch *gdbarch; |
1107 | struct gdbarch_tdep *tdep = NULL; | |
1108 | int am33_mode; | |
1109 | gdbarch_register_name_ftype *register_name; | |
1110 | int mach; | |
1111 | int num_regs; | |
1112 | ||
1113 | arches = gdbarch_list_lookup_by_info (arches, &info); | |
1114 | if (arches != NULL) | |
1115 | return arches->gdbarch; | |
1116 | tdep = xmalloc (sizeof (struct gdbarch_tdep)); | |
1117 | gdbarch = gdbarch_alloc (&info, tdep); | |
1118 | ||
1119 | if (info.bfd_arch_info != NULL | |
f6df245f | 1120 | && info.bfd_arch_info->arch == bfd_arch_mn10300) |
91225883 AC |
1121 | mach = info.bfd_arch_info->mach; |
1122 | else | |
1123 | mach = 0; | |
1124 | switch (mach) | |
1125 | { | |
1126 | case 0: | |
f6df245f | 1127 | case bfd_mach_mn10300: |
91225883 AC |
1128 | am33_mode = 0; |
1129 | register_name = mn10300_generic_register_name; | |
1130 | num_regs = 32; | |
1131 | break; | |
1132 | case bfd_mach_am33: | |
c2d11a7d | 1133 | am33_mode = 1; |
91225883 AC |
1134 | register_name = am33_register_name; |
1135 | num_regs = 32; | |
1136 | break; | |
1137 | default: | |
8e65ff28 AC |
1138 | internal_error (__FILE__, __LINE__, |
1139 | "mn10300_gdbarch_init: Unknown mn10300 variant"); | |
91225883 | 1140 | return NULL; /* keep GCC happy. */ |
c2d11a7d | 1141 | } |
c906108c | 1142 | |
584f96a8 JB |
1143 | /* Registers. */ |
1144 | set_gdbarch_num_regs (gdbarch, num_regs); | |
1145 | set_gdbarch_register_name (gdbarch, register_name); | |
f6df245f | 1146 | set_gdbarch_register_size (gdbarch, 4); |
584f96a8 JB |
1147 | set_gdbarch_register_bytes (gdbarch, |
1148 | num_regs * gdbarch_register_size (gdbarch)); | |
a0ed5532 | 1149 | set_gdbarch_deprecated_max_register_raw_size (gdbarch, 4); |
584f96a8 | 1150 | set_gdbarch_register_raw_size (gdbarch, mn10300_register_raw_size); |
f6df245f | 1151 | set_gdbarch_register_byte (gdbarch, mn10300_register_byte); |
a0ed5532 | 1152 | set_gdbarch_deprecated_max_register_virtual_size (gdbarch, 4); |
f6df245f | 1153 | set_gdbarch_register_virtual_size (gdbarch, mn10300_register_virtual_size); |
584f96a8 | 1154 | set_gdbarch_register_virtual_type (gdbarch, mn10300_register_virtual_type); |
23436510 | 1155 | set_gdbarch_dwarf2_reg_to_regnum (gdbarch, mn10300_dwarf2_reg_to_regnum); |
903ad3a6 | 1156 | set_gdbarch_deprecated_do_registers_info (gdbarch, mn10300_do_registers_info); |
a15525c1 AC |
1157 | set_gdbarch_sp_regnum (gdbarch, 8); |
1158 | set_gdbarch_pc_regnum (gdbarch, 9); | |
ad8fe2ce | 1159 | set_gdbarch_fp_regnum (gdbarch, 31); |
39d4ef09 | 1160 | set_gdbarch_virtual_frame_pointer (gdbarch, mn10300_virtual_frame_pointer); |
584f96a8 JB |
1161 | |
1162 | /* Breakpoints. */ | |
ad8fe2ce JB |
1163 | set_gdbarch_breakpoint_from_pc (gdbarch, mn10300_breakpoint_from_pc); |
1164 | set_gdbarch_function_start_offset (gdbarch, 0); | |
1165 | set_gdbarch_decr_pc_after_break (gdbarch, 0); | |
584f96a8 JB |
1166 | |
1167 | /* Stack unwinding. */ | |
ad8fe2ce | 1168 | set_gdbarch_inner_than (gdbarch, core_addr_lessthan); |
6913c89a | 1169 | set_gdbarch_deprecated_saved_pc_after_call (gdbarch, mn10300_saved_pc_after_call); |
e9582e71 | 1170 | set_gdbarch_deprecated_init_extra_frame_info (gdbarch, mn10300_init_extra_frame_info); |
a5afb99f | 1171 | set_gdbarch_deprecated_init_frame_pc (gdbarch, init_frame_pc_noop); |
f30ee0bc | 1172 | set_gdbarch_deprecated_frame_init_saved_regs (gdbarch, mn10300_frame_init_saved_regs); |
618ce49f | 1173 | set_gdbarch_deprecated_frame_chain (gdbarch, mn10300_frame_chain); |
8bedc050 | 1174 | set_gdbarch_deprecated_frame_saved_pc (gdbarch, mn10300_frame_saved_pc); |
26e9b323 AC |
1175 | set_gdbarch_deprecated_extract_return_value (gdbarch, mn10300_extract_return_value); |
1176 | set_gdbarch_deprecated_extract_struct_value_address | |
ad8fe2ce | 1177 | (gdbarch, mn10300_extract_struct_value_address); |
ebba8386 | 1178 | set_gdbarch_deprecated_store_return_value (gdbarch, mn10300_store_return_value); |
4183d812 | 1179 | set_gdbarch_deprecated_store_struct_return (gdbarch, mn10300_store_struct_return); |
749b82f6 | 1180 | set_gdbarch_deprecated_pop_frame (gdbarch, mn10300_pop_frame); |
ad8fe2ce JB |
1181 | set_gdbarch_skip_prologue (gdbarch, mn10300_skip_prologue); |
1182 | set_gdbarch_frame_args_skip (gdbarch, 0); | |
ad8fe2ce JB |
1183 | set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown); |
1184 | /* That's right, we're using the stack pointer as our frame pointer. */ | |
1185 | set_gdbarch_read_fp (gdbarch, generic_target_read_sp); | |
584f96a8 JB |
1186 | |
1187 | /* Calling functions in the inferior from GDB. */ | |
ad8fe2ce JB |
1188 | set_gdbarch_call_dummy_words (gdbarch, mn10300_call_dummy_words); |
1189 | set_gdbarch_sizeof_call_dummy_words (gdbarch, | |
1190 | sizeof (mn10300_call_dummy_words)); | |
ae45cd16 | 1191 | set_gdbarch_deprecated_pc_in_call_dummy (gdbarch, deprecated_pc_in_call_dummy_at_entry_point); |
b81774d8 | 1192 | set_gdbarch_deprecated_push_arguments (gdbarch, mn10300_push_arguments); |
584f96a8 | 1193 | set_gdbarch_reg_struct_has_addr (gdbarch, mn10300_reg_struct_has_addr); |
28f617b3 | 1194 | set_gdbarch_deprecated_push_return_address (gdbarch, mn10300_push_return_address); |
584f96a8 | 1195 | set_gdbarch_save_dummy_frame_tos (gdbarch, generic_save_dummy_frame_tos); |
ad8fe2ce JB |
1196 | set_gdbarch_use_struct_convention (gdbarch, mn10300_use_struct_convention); |
1197 | ||
91225883 AC |
1198 | tdep->am33_mode = am33_mode; |
1199 | ||
6c0e89ed AC |
1200 | /* Should be using push_dummy_call. */ |
1201 | set_gdbarch_deprecated_dummy_write_sp (gdbarch, generic_target_write_sp); | |
1202 | ||
91225883 AC |
1203 | return gdbarch; |
1204 | } | |
1205 | ||
c906108c | 1206 | void |
fba45db2 | 1207 | _initialize_mn10300_tdep (void) |
c906108c SS |
1208 | { |
1209 | /* printf("_initialize_mn10300_tdep\n"); */ | |
1210 | ||
1211 | tm_print_insn = print_insn_mn10300; | |
1212 | ||
91225883 | 1213 | register_gdbarch_init (bfd_arch_mn10300, mn10300_gdbarch_init); |
c906108c | 1214 | } |