Commit | Line | Data |
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45a70ed6 SG |
1 | /* Target-dependent code for Mitsubishi D30V, for GDB. |
2 | Copyright (C) 1996, 1997 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
19 | ||
20 | /* Contributed by Martin Hunt, hunt@cygnus.com */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include "frame.h" | |
24 | #include "obstack.h" | |
25 | #include "symtab.h" | |
26 | #include "gdbtypes.h" | |
27 | #include "gdbcmd.h" | |
28 | #include "gdbcore.h" | |
29 | #include "gdb_string.h" | |
30 | #include "value.h" | |
31 | #include "inferior.h" | |
32 | #include "dis-asm.h" | |
33 | #include "symfile.h" | |
34 | #include "objfiles.h" | |
35 | ||
36 | void d30v_frame_find_saved_regs PARAMS ((struct frame_info *fi, | |
37 | struct frame_saved_regs *fsr)); | |
38 | static void d30v_pop_dummy_frame PARAMS ((struct frame_info *fi)); | |
5d62f957 MM |
39 | static void d30v_print_flags PARAMS ((void)); |
40 | static void print_flags_command PARAMS ((char *, int)); | |
45a70ed6 | 41 | |
7359fb1d DT |
42 | /* the following defines assume: |
43 | fp is r61, lr is r62, sp is r63, and ?? is r22 | |
44 | if that changes, they will need to be updated */ | |
45 | ||
46 | #define OP_MASK_ALL_BUT_RA 0x0ffc0fff /* throw away Ra, keep the rest */ | |
47 | ||
48 | #define OP_STW_SPM 0x054c0fc0 /* stw Ra, @(sp-) */ | |
49 | #define OP_STW_SP_R0 0x05400fc0 /* stw Ra, @(sp,r0) */ | |
50 | #define OP_STW_SP_IMM0 0x05480fc0 /* st Ra, @(sp, 0x0) */ | |
51 | #define OP_STW_R22P_R0 0x05440580 /* stw Ra, @(r22+,r0) */ | |
52 | ||
53 | #define OP_ST2W_SPM 0x056c0fc0 /* st2w Ra, @(sp-) */ | |
54 | #define OP_ST2W_SP_R0 0x05600fc0 /* st2w Ra, @(sp, r0) */ | |
55 | #define OP_ST2W_SP_IMM0 0x05680fc0 /* st2w Ra, @(sp, 0x0) */ | |
56 | #define OP_ST2W_R22P_R0 0x05640580 /* st2w Ra, @(r22+, r0) */ | |
57 | ||
58 | #define OP_MASK_OPCODE 0x0ffc0000 /* just the opcode, ign operands */ | |
59 | #define OP_NOP 0x00f00000 /* nop */ | |
60 | ||
61 | #define OP_MASK_ALL_BUT_IMM 0x0fffffc0 /* throw away imm, keep the rest */ | |
62 | #define OP_SUB_SP_IMM 0x082bffc0 /* sub sp,sp,imm */ | |
63 | #define OP_ADD_SP_IMM 0x080bffc0 /* add sp,sp,imm */ | |
64 | #define OP_ADD_R22_SP_IMM 0x08096fc0 /* add r22,sp,imm */ | |
65 | #define OP_STW_FP_SP_IMM 0x054bdfc0 /* stw fp,@(sp,imm) */ | |
66 | ||
67 | /* no mask */ | |
68 | #define OP_OR_FP_R0_SP 0x03a3d03f /* or fp,r0,sp */ | |
69 | #define OP_OR_FP_SP_R0 0x03a3dfc0 /* or fp,sp,r0 */ | |
70 | #define OP_OR_FP_IMM0_SP 0x03abd03f /* or fp,0x0,sp */ | |
71 | #define OP_STW_FP_R22P_R0 0x0547d580 /* stw fp,@(r22+,r0) */ | |
72 | #define OP_STW_LR_R22P_R0 0x0547e580 /* stw lr,@(r22+,r0) */ | |
73 | ||
74 | #define OP_MASK_OP_AND_RB 0x0ff80fc0 /* keep op and rb,throw away rest */ | |
75 | #define OP_STW_SP_IMM 0x05480fc0 /* stw Ra,@(sp,imm) */ | |
76 | #define OP_ST2W_SP_IMM 0x05680fc0 /* st2w Ra,@(sp,imm) */ | |
77 | #define OP_STW_FP_IMM 0x05480f40 /* stw Ra,@(fp,imm) */ | |
78 | #define OP_STW_FP_R0 0x05400f40 /* stw Ra,@(fp,r0) */ | |
79 | ||
80 | #define OP_MASK_FM_BIT 0x80000000 | |
81 | #define OP_MASK_CC_BITS 0x70000000 | |
82 | #define OP_MASK_SUB_INST 0x0fffffff | |
83 | ||
84 | #define EXTRACT_RA(op) (((op) >> 12) & 0x3f) | |
85 | #define EXTRACT_RB(op) (((op) >> 6) & 0x3f) | |
86 | #define EXTRACT_RC(op) (((op) & 0x3f) | |
87 | #define EXTRACT_UIMM6(op) ((op) & 0x3f) | |
88 | #define EXTRACT_IMM6(op) ((((int)EXTRACT_UIMM6(op)) << 26) >> 26) | |
89 | #define EXTRACT_IMM26(op) ((((op)&0x0ff00000) >> 2) | ((op)&0x0003ffff)) | |
90 | #define EXTRACT_IMM32(opl, opr) ((EXTRACT_UIMM6(opl) << 26)|EXTRACT_IMM26(opr)) | |
91 | ||
45a70ed6 SG |
92 | /* Discard from the stack the innermost frame, restoring all saved |
93 | registers. */ | |
94 | ||
95 | void | |
96 | d30v_pop_frame () | |
97 | { | |
98 | struct frame_info *frame = get_current_frame (); | |
99 | CORE_ADDR fp; | |
100 | int regnum; | |
101 | struct frame_saved_regs fsr; | |
102 | char raw_buffer[8]; | |
103 | ||
104 | fp = FRAME_FP (frame); | |
105 | if (frame->dummy) | |
106 | { | |
107 | d30v_pop_dummy_frame(frame); | |
108 | return; | |
109 | } | |
110 | ||
111 | /* fill out fsr with the address of where each */ | |
112 | /* register was stored in the frame */ | |
113 | get_frame_saved_regs (frame, &fsr); | |
114 | ||
115 | /* now update the current registers with the old values */ | |
116 | for (regnum = A0_REGNUM; regnum < A0_REGNUM+2 ; regnum++) | |
117 | { | |
118 | if (fsr.regs[regnum]) | |
119 | { | |
120 | read_memory (fsr.regs[regnum], raw_buffer, 8); | |
121 | write_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 8); | |
122 | } | |
123 | } | |
124 | for (regnum = 0; regnum < SP_REGNUM; regnum++) | |
125 | { | |
126 | if (fsr.regs[regnum]) | |
127 | { | |
7359fb1d | 128 | write_register (regnum, read_memory_unsigned_integer (fsr.regs[regnum], 4)); |
45a70ed6 SG |
129 | } |
130 | } | |
131 | if (fsr.regs[PSW_REGNUM]) | |
132 | { | |
7359fb1d | 133 | write_register (PSW_REGNUM, read_memory_unsigned_integer (fsr.regs[PSW_REGNUM], 4)); |
45a70ed6 SG |
134 | } |
135 | ||
7359fb1d | 136 | write_register (PC_REGNUM, read_register(LR_REGNUM)); |
45a70ed6 SG |
137 | write_register (SP_REGNUM, fp + frame->size); |
138 | target_store_registers (-1); | |
139 | flush_cached_frames (); | |
140 | } | |
141 | ||
142 | static int | |
143 | check_prologue (op) | |
7359fb1d | 144 | unsigned long op; |
45a70ed6 | 145 | { |
7359fb1d DT |
146 | /* add sp,sp,imm -- observed */ |
147 | if ((op & OP_MASK_ALL_BUT_IMM) == OP_ADD_SP_IMM) | |
45a70ed6 SG |
148 | return 1; |
149 | ||
7359fb1d DT |
150 | /* add r22,sp,imm -- observed */ |
151 | if ((op & OP_MASK_ALL_BUT_IMM) == OP_ADD_R22_SP_IMM) | |
45a70ed6 SG |
152 | return 1; |
153 | ||
7359fb1d DT |
154 | /* or fp,r0,sp -- observed */ |
155 | if (op == OP_OR_FP_R0_SP) | |
45a70ed6 SG |
156 | return 1; |
157 | ||
7359fb1d DT |
158 | /* nop */ |
159 | if ((op & OP_MASK_OPCODE) == OP_NOP) | |
45a70ed6 SG |
160 | return 1; |
161 | ||
7359fb1d DT |
162 | /* stw Ra,@(sp,r0) */ |
163 | if ((op & OP_MASK_ALL_BUT_RA) == OP_STW_SP_R0) | |
45a70ed6 SG |
164 | return 1; |
165 | ||
7359fb1d DT |
166 | /* stw Ra,@(sp,0x0) */ |
167 | if ((op & OP_MASK_ALL_BUT_RA) == OP_STW_SP_IMM0) | |
45a70ed6 SG |
168 | return 1; |
169 | ||
7359fb1d DT |
170 | /* st2w Ra,@(sp,r0) */ |
171 | if ((op & OP_MASK_ALL_BUT_RA) == OP_ST2W_SP_R0) | |
172 | return 1; | |
173 | ||
174 | /* st2w Ra,@(sp,0x0) */ | |
175 | if ((op & OP_MASK_ALL_BUT_RA) == OP_ST2W_SP_IMM0) | |
176 | return 1; | |
177 | ||
178 | /* stw fp, @(r22+,r0) -- observed */ | |
179 | if (op == OP_STW_FP_R22P_R0) | |
180 | return 1; | |
181 | ||
182 | /* stw r62, @(r22+,r0) -- observed */ | |
183 | if (op == OP_STW_LR_R22P_R0) | |
184 | return 1; | |
185 | ||
186 | /* stw Ra, @(fp,r0) -- observed */ | |
187 | if ((op & OP_MASK_ALL_BUT_RA) == OP_STW_FP_R0) | |
188 | return 1; /* first arg */ | |
189 | ||
190 | /* stw Ra, @(fp,imm) -- observed */ | |
191 | if ((op & OP_MASK_OP_AND_RB) == OP_STW_FP_IMM) | |
192 | return 1; /* second and subsequent args */ | |
193 | ||
194 | /* stw fp,@(sp,imm) -- observed */ | |
195 | if ((op & OP_MASK_ALL_BUT_IMM) == OP_STW_FP_SP_IMM) | |
196 | return 1; | |
197 | ||
198 | /* st2w Ra,@(r22+,r0) */ | |
199 | if ((op & OP_MASK_ALL_BUT_RA) == OP_ST2W_R22P_R0) | |
45a70ed6 SG |
200 | return 1; |
201 | ||
7359fb1d DT |
202 | /* stw Ra, @(sp-) */ |
203 | if ((op & OP_MASK_ALL_BUT_RA) == OP_STW_SPM) | |
204 | return 1; | |
205 | ||
206 | /* st2w Ra, @(sp-) */ | |
207 | if ((op & OP_MASK_ALL_BUT_RA) == OP_ST2W_SPM) | |
208 | return 1; | |
209 | ||
210 | /* sub.? sp,sp,imm */ | |
211 | if ((op & OP_MASK_ALL_BUT_IMM) == OP_SUB_SP_IMM) | |
212 | return 1; | |
213 | ||
45a70ed6 SG |
214 | return 0; |
215 | } | |
216 | ||
217 | CORE_ADDR | |
218 | d30v_skip_prologue (pc) | |
219 | CORE_ADDR pc; | |
220 | { | |
7359fb1d DT |
221 | unsigned long op[2]; |
222 | unsigned long opl, opr; /* left / right sub operations */ | |
223 | unsigned long fm0, fm1; /* left / right mode bits */ | |
224 | unsigned long cc0, cc1; | |
225 | unsigned long op1, op2; | |
45a70ed6 SG |
226 | CORE_ADDR func_addr, func_end; |
227 | struct symtab_and_line sal; | |
228 | ||
229 | /* If we have line debugging information, then the end of the */ | |
230 | /* prologue should the first assembly instruction of the first source line */ | |
231 | if (find_pc_partial_function (pc, NULL, &func_addr, &func_end)) | |
232 | { | |
233 | sal = find_pc_line (func_addr, 0); | |
234 | if ( sal.end && sal.end < func_end) | |
235 | return sal.end; | |
236 | } | |
237 | ||
7359fb1d | 238 | if (target_read_memory (pc, (char *)&op[0], 8)) |
45a70ed6 SG |
239 | return pc; /* Can't access it -- assume no prologue. */ |
240 | ||
241 | while (1) | |
242 | { | |
7359fb1d DT |
243 | opl = (unsigned long)read_memory_integer (pc, 4); |
244 | opr = (unsigned long)read_memory_integer (pc+4, 4); | |
245 | ||
246 | fm0 = (opl & OP_MASK_FM_BIT); | |
247 | fm1 = (opr & OP_MASK_FM_BIT); | |
248 | ||
249 | cc0 = (opl & OP_MASK_CC_BITS); | |
250 | cc1 = (opr & OP_MASK_CC_BITS); | |
251 | ||
252 | opl = (opl & OP_MASK_SUB_INST); | |
253 | opr = (opr & OP_MASK_SUB_INST); | |
254 | ||
255 | if (fm0 && fm1) | |
45a70ed6 | 256 | { |
7359fb1d DT |
257 | /* long instruction (opl contains the opcode) */ |
258 | if (((opl & OP_MASK_ALL_BUT_IMM) != OP_ADD_SP_IMM) && /* add sp,sp,imm */ | |
259 | ((opl & OP_MASK_ALL_BUT_IMM) != OP_ADD_R22_SP_IMM) && /* add r22,sp,imm */ | |
260 | ((opl & OP_MASK_OP_AND_RB) != OP_STW_SP_IMM) && /* stw Ra, @(sp,imm) */ | |
261 | ((opl & OP_MASK_OP_AND_RB) != OP_ST2W_SP_IMM)) /* st2w Ra, @(sp,imm) */ | |
45a70ed6 SG |
262 | break; |
263 | } | |
264 | else | |
265 | { | |
266 | /* short instructions */ | |
7359fb1d | 267 | if (fm0 && !fm1) |
45a70ed6 | 268 | { |
7359fb1d DT |
269 | op1 = opr; |
270 | op2 = opl; | |
45a70ed6 SG |
271 | } |
272 | else | |
273 | { | |
7359fb1d DT |
274 | op1 = opl; |
275 | op2 = opr; | |
45a70ed6 SG |
276 | } |
277 | if (check_prologue(op1)) | |
278 | { | |
279 | if (!check_prologue(op2)) | |
280 | { | |
281 | /* if the previous opcode was really part of the prologue */ | |
282 | /* and not just a NOP, then we want to break after both instructions */ | |
7359fb1d DT |
283 | if ((op1 & OP_MASK_OPCODE) != OP_NOP) |
284 | pc += 8; | |
45a70ed6 SG |
285 | break; |
286 | } | |
287 | } | |
288 | else | |
289 | break; | |
290 | } | |
7359fb1d | 291 | pc += 8; |
45a70ed6 SG |
292 | } |
293 | return pc; | |
294 | } | |
295 | ||
296 | /* Given a GDB frame, determine the address of the calling function's frame. | |
297 | This will be used to create a new GDB frame struct, and then | |
298 | INIT_EXTRA_FRAME_INFO and INIT_FRAME_PC will be called for the new frame. | |
299 | */ | |
300 | ||
301 | CORE_ADDR | |
302 | d30v_frame_chain (frame) | |
303 | struct frame_info *frame; | |
304 | { | |
305 | struct frame_saved_regs fsr; | |
306 | ||
307 | d30v_frame_find_saved_regs (frame, &fsr); | |
308 | ||
309 | if (frame->return_pc == IMEM_START) | |
310 | return (CORE_ADDR)0; | |
311 | ||
312 | if (!fsr.regs[FP_REGNUM]) | |
313 | { | |
314 | if (!fsr.regs[SP_REGNUM] || fsr.regs[SP_REGNUM] == STACK_START) | |
315 | return (CORE_ADDR)0; | |
316 | ||
317 | return fsr.regs[SP_REGNUM]; | |
318 | } | |
319 | ||
7359fb1d | 320 | if (!read_memory_unsigned_integer(fsr.regs[FP_REGNUM],4)) |
45a70ed6 SG |
321 | return (CORE_ADDR)0; |
322 | ||
7359fb1d | 323 | return read_memory_unsigned_integer(fsr.regs[FP_REGNUM],4)| DMEM_START; |
45a70ed6 SG |
324 | } |
325 | ||
326 | static int next_addr, uses_frame; | |
7359fb1d | 327 | static int frame_size; |
45a70ed6 SG |
328 | |
329 | static int | |
330 | prologue_find_regs (op, fsr, addr) | |
7359fb1d | 331 | unsigned long op; |
45a70ed6 SG |
332 | struct frame_saved_regs *fsr; |
333 | CORE_ADDR addr; | |
334 | { | |
335 | int n; | |
7359fb1d | 336 | int offset; |
45a70ed6 | 337 | |
7359fb1d DT |
338 | /* add sp,sp,imm -- observed */ |
339 | if ((op & OP_MASK_ALL_BUT_IMM) == OP_ADD_SP_IMM) | |
45a70ed6 | 340 | { |
7359fb1d DT |
341 | offset = EXTRACT_IMM6(op); |
342 | /*next_addr += offset;*/ | |
343 | frame_size += -offset; | |
45a70ed6 SG |
344 | return 1; |
345 | } | |
346 | ||
7359fb1d DT |
347 | /* add r22,sp,imm -- observed */ |
348 | if ((op & OP_MASK_ALL_BUT_IMM) == OP_ADD_R22_SP_IMM) | |
45a70ed6 | 349 | { |
7359fb1d DT |
350 | offset = EXTRACT_IMM6(op); |
351 | next_addr = (offset - frame_size); | |
352 | return 1; | |
353 | } | |
354 | ||
355 | /* stw Ra, @(fp, offset) -- observed */ | |
356 | if ((op & OP_MASK_OP_AND_RB) == OP_STW_FP_IMM) | |
357 | { | |
358 | n = EXTRACT_RA(op); | |
359 | offset = EXTRACT_IMM6(op); | |
360 | fsr->regs[n] = (offset - frame_size); | |
45a70ed6 SG |
361 | return 1; |
362 | } | |
363 | ||
7359fb1d DT |
364 | /* stw Ra, @(fp, r0) -- observed */ |
365 | if ((op & OP_MASK_ALL_BUT_RA) == OP_STW_FP_R0) | |
45a70ed6 | 366 | { |
7359fb1d DT |
367 | n = EXTRACT_RA(op); |
368 | fsr->regs[n] = (- frame_size); | |
45a70ed6 SG |
369 | return 1; |
370 | } | |
371 | ||
7359fb1d DT |
372 | /* or fp,0,sp -- observed */ |
373 | if ((op == OP_OR_FP_R0_SP) || | |
374 | (op == OP_OR_FP_SP_R0) || | |
375 | (op == OP_OR_FP_IMM0_SP)) | |
45a70ed6 SG |
376 | { |
377 | uses_frame = 1; | |
378 | return 1; | |
379 | } | |
380 | ||
381 | /* nop */ | |
7359fb1d | 382 | if ((op & OP_MASK_OPCODE) == OP_NOP) |
45a70ed6 SG |
383 | return 1; |
384 | ||
7359fb1d DT |
385 | /* stw Ra,@(r22+,r0) -- observed */ |
386 | if ((op & OP_MASK_ALL_BUT_RA) == OP_STW_R22P_R0) | |
387 | { | |
388 | n = EXTRACT_RA(op); | |
389 | fsr->regs[n] = next_addr; | |
390 | next_addr += 4; | |
391 | return 1; | |
392 | } | |
393 | #if 0 /* subsumed in pattern above */ | |
394 | /* stw fp,@(r22+,r0) -- observed */ | |
395 | if (op == OP_STW_FP_R22P_R0) | |
396 | { | |
397 | fsr->regs[FP_REGNUM] = next_addr; /* XXX */ | |
398 | next_addr += 4; | |
399 | return 1; | |
400 | } | |
401 | ||
402 | /* stw r62,@(r22+,r0) -- observed */ | |
403 | if (op == OP_STW_LR_R22P_R0) | |
404 | { | |
405 | fsr->regs[LR_REGNUM] = next_addr; | |
406 | next_addr += 4; | |
407 | return 1; | |
408 | } | |
409 | #endif | |
410 | /* st2w Ra,@(r22+,r0) -- observed */ | |
411 | if ((op & OP_MASK_ALL_BUT_RA) == OP_ST2W_R22P_R0) | |
412 | { | |
413 | n = EXTRACT_RA(op); | |
414 | fsr->regs[n] = next_addr; | |
415 | fsr->regs[n+1] = next_addr + 4; | |
416 | next_addr += 8; | |
417 | return 1; | |
418 | } | |
419 | ||
420 | /* stw rn, @(sp-) */ | |
421 | if ((op & OP_MASK_ALL_BUT_RA) == OP_STW_SPM) | |
422 | { | |
423 | n = EXTRACT_RA(op); | |
424 | fsr->regs[n] = next_addr; | |
425 | next_addr -= 4; | |
426 | return 1; | |
427 | } | |
428 | ||
429 | /* st2w Ra, @(sp-) */ | |
430 | else if ((op & OP_MASK_ALL_BUT_RA) == OP_ST2W_SPM) | |
45a70ed6 | 431 | { |
7359fb1d | 432 | n = EXTRACT_RA(op); |
45a70ed6 | 433 | fsr->regs[n] = next_addr; |
7359fb1d DT |
434 | fsr->regs[n+1] = next_addr+4; |
435 | next_addr -= 8; | |
436 | return 1; | |
437 | } | |
438 | ||
439 | /* sub sp,sp,imm */ | |
440 | if ((op & OP_MASK_ALL_BUT_IMM) == OP_SUB_SP_IMM) | |
441 | { | |
442 | offset = EXTRACT_IMM6(op); | |
443 | next_addr -= offset; | |
45a70ed6 SG |
444 | return 1; |
445 | } | |
446 | ||
7359fb1d DT |
447 | /* st rn, @(sp,0) */ |
448 | if (((op & OP_MASK_ALL_BUT_RA) == OP_STW_SP_R0) || | |
449 | ((op & OP_MASK_ALL_BUT_RA) == OP_STW_SP_IMM0)) | |
45a70ed6 | 450 | { |
7359fb1d | 451 | n = EXTRACT_RA(op); |
45a70ed6 | 452 | fsr->regs[n] = next_addr; |
7359fb1d DT |
453 | return 1; |
454 | } | |
455 | ||
456 | /* st2w rn, @(sp,0) */ | |
457 | if (((op & OP_MASK_ALL_BUT_RA) == OP_ST2W_SP_R0) || | |
458 | ((op & OP_MASK_ALL_BUT_RA) == OP_ST2W_SP_IMM0)) | |
459 | { | |
460 | n = EXTRACT_RA(op); | |
461 | fsr->regs[n] = next_addr; | |
462 | fsr->regs[n+1] = next_addr+4; | |
45a70ed6 SG |
463 | return 1; |
464 | } | |
465 | ||
466 | return 0; | |
467 | } | |
468 | ||
469 | /* Put here the code to store, into a struct frame_saved_regs, the | |
470 | addresses of the saved registers of frame described by FRAME_INFO. | |
471 | This includes special registers such as pc and fp saved in special | |
472 | ways in the stack frame. sp is even more special: the address we | |
473 | return for it IS the sp for the next frame. */ | |
474 | void | |
475 | d30v_frame_find_saved_regs (fi, fsr) | |
476 | struct frame_info *fi; | |
477 | struct frame_saved_regs *fsr; | |
478 | { | |
479 | CORE_ADDR fp, pc; | |
7359fb1d DT |
480 | unsigned long opl, opr; |
481 | unsigned long op1, op2; | |
482 | unsigned long fm0, fm1; | |
45a70ed6 SG |
483 | int i; |
484 | ||
485 | fp = fi->frame; | |
486 | memset (fsr, 0, sizeof (*fsr)); | |
487 | next_addr = 0; | |
7359fb1d | 488 | frame_size = 0; |
45a70ed6 SG |
489 | |
490 | pc = get_pc_function_start (fi->pc); | |
491 | ||
492 | uses_frame = 0; | |
493 | while (1) | |
494 | { | |
7359fb1d DT |
495 | opl = (unsigned long)read_memory_integer (pc, 4); |
496 | opr = (unsigned long)read_memory_integer (pc+4, 4); | |
497 | ||
498 | fm0 = (opl & OP_MASK_FM_BIT); | |
499 | fm1 = (opr & OP_MASK_FM_BIT); | |
500 | ||
501 | opl = (opl & OP_MASK_SUB_INST); | |
502 | opr = (opr & OP_MASK_SUB_INST); | |
503 | ||
504 | if (fm0 && fm1) | |
45a70ed6 SG |
505 | { |
506 | /* long instruction */ | |
7359fb1d DT |
507 | if ((opl & OP_MASK_ALL_BUT_IMM) == OP_ADD_SP_IMM) |
508 | { | |
509 | /* add sp,sp,n */ | |
510 | long offset = EXTRACT_IMM32(opl, opr); | |
511 | frame_size += -offset; | |
512 | } | |
513 | else if ((opl & OP_MASK_ALL_BUT_IMM) == OP_ADD_R22_SP_IMM) | |
45a70ed6 | 514 | { |
7359fb1d DT |
515 | /* add r22,sp,offset */ |
516 | long offset = EXTRACT_IMM32(opl,opr); | |
517 | next_addr = (offset - frame_size); | |
45a70ed6 | 518 | } |
7359fb1d | 519 | else if ((opl & OP_MASK_OP_AND_RB) == OP_STW_SP_IMM) |
45a70ed6 | 520 | { |
7359fb1d DT |
521 | /* st Ra, @(sp,imm) */ |
522 | long offset = EXTRACT_IMM32(opl, opr); | |
523 | short n = EXTRACT_RA(opl); | |
524 | fsr->regs[n] = (offset - frame_size); | |
45a70ed6 | 525 | } |
7359fb1d | 526 | else if ((opl & OP_MASK_OP_AND_RB) == OP_ST2W_SP_IMM) |
45a70ed6 | 527 | { |
7359fb1d DT |
528 | /* st2w Ra, @(sp,offset) */ |
529 | long offset = EXTRACT_IMM32(opl, opr); | |
530 | short n = EXTRACT_RA(opl); | |
531 | fsr->regs[n] = (offset - frame_size); | |
532 | fsr->regs[n+1] = (offset - frame_size) + 4; | |
45a70ed6 SG |
533 | } |
534 | else | |
535 | break; | |
536 | } | |
537 | else | |
538 | { | |
539 | /* short instructions */ | |
7359fb1d | 540 | if (fm0 && !fm1) |
45a70ed6 | 541 | { |
7359fb1d DT |
542 | op2 = opl; |
543 | op1 = opr; | |
45a70ed6 SG |
544 | } |
545 | else | |
546 | { | |
7359fb1d DT |
547 | op1 = opl; |
548 | op2 = opr; | |
45a70ed6 SG |
549 | } |
550 | if (!prologue_find_regs(op1,fsr,pc) || !prologue_find_regs(op2,fsr,pc)) | |
551 | break; | |
552 | } | |
7359fb1d | 553 | pc += 8; |
45a70ed6 SG |
554 | } |
555 | ||
7359fb1d DT |
556 | fi->size = frame_size; |
557 | if (!fp) | |
558 | #if 0 | |
45a70ed6 | 559 | fp = read_register(SP_REGNUM) | DMEM_START; |
7359fb1d DT |
560 | #else |
561 | fp = read_register(SP_REGNUM); | |
562 | #endif | |
45a70ed6 SG |
563 | for (i=0; i<NUM_REGS-1; i++) |
564 | if (fsr->regs[i]) | |
565 | { | |
7359fb1d | 566 | fsr->regs[i] = fsr->regs[i] + fp + frame_size; |
45a70ed6 SG |
567 | } |
568 | ||
569 | if (fsr->regs[LR_REGNUM]) | |
7359fb1d | 570 | fi->return_pc = read_memory_unsigned_integer(fsr->regs[LR_REGNUM],4); |
45a70ed6 | 571 | else |
7359fb1d | 572 | fi->return_pc = read_register(LR_REGNUM); |
45a70ed6 SG |
573 | |
574 | /* th SP is not normally (ever?) saved, but check anyway */ | |
575 | if (!fsr->regs[SP_REGNUM]) | |
576 | { | |
577 | /* if the FP was saved, that means the current FP is valid, */ | |
578 | /* otherwise, it isn't being used, so we use the SP instead */ | |
579 | if (uses_frame) | |
580 | fsr->regs[SP_REGNUM] = read_register(FP_REGNUM) + fi->size; | |
581 | else | |
582 | { | |
583 | fsr->regs[SP_REGNUM] = fp + fi->size; | |
584 | fi->frameless = 1; | |
585 | fsr->regs[FP_REGNUM] = 0; | |
586 | } | |
587 | } | |
588 | } | |
589 | ||
590 | void | |
591 | d30v_init_extra_frame_info (fromleaf, fi) | |
592 | int fromleaf; | |
593 | struct frame_info *fi; | |
594 | { | |
595 | struct frame_saved_regs dummy; | |
596 | ||
7359fb1d | 597 | if (fi->next && (fi->pc == 0)) |
45a70ed6 SG |
598 | fi->pc = fi->next->return_pc; |
599 | ||
600 | d30v_frame_find_saved_regs (fi, &dummy); | |
601 | } | |
602 | ||
7359fb1d DT |
603 | void |
604 | d30v_init_frame_pc (fromleaf, prev) | |
605 | int fromleaf; | |
606 | struct frame_info *prev; | |
607 | { | |
608 | /* default value, put here so we can breakpoint on it and | |
609 | see if the default value is really the right thing to use */ | |
610 | prev->pc = (fromleaf ? SAVED_PC_AFTER_CALL (prev->next) : \ | |
611 | prev->next ? FRAME_SAVED_PC (prev->next) : read_pc ()); | |
612 | } | |
613 | ||
45a70ed6 SG |
614 | static void d30v_print_register PARAMS ((int regnum, int tabular)); |
615 | ||
616 | static void | |
617 | d30v_print_register (regnum, tabular) | |
618 | int regnum; | |
619 | int tabular; | |
620 | { | |
621 | if (regnum < A0_REGNUM) | |
622 | { | |
623 | if (tabular) | |
624 | printf_filtered ("%08x", read_register (regnum)); | |
625 | else | |
626 | printf_filtered ("0x%x %d", read_register (regnum), | |
627 | read_register (regnum)); | |
628 | } | |
629 | else | |
630 | { | |
631 | char regbuf[MAX_REGISTER_RAW_SIZE]; | |
632 | ||
633 | read_relative_register_raw_bytes (regnum, regbuf); | |
634 | ||
635 | val_print (REGISTER_VIRTUAL_TYPE (regnum), regbuf, 0, | |
636 | gdb_stdout, 'x', 1, 0, Val_pretty_default); | |
637 | ||
638 | if (!tabular) | |
639 | { | |
640 | printf_filtered (" "); | |
641 | val_print (REGISTER_VIRTUAL_TYPE (regnum), regbuf, 0, | |
642 | gdb_stdout, 'd', 1, 0, Val_pretty_default); | |
643 | } | |
644 | } | |
645 | } | |
646 | ||
5d62f957 MM |
647 | static void |
648 | d30v_print_flags () | |
649 | { | |
650 | long psw = read_register (PSW_REGNUM); | |
651 | printf_filtered ("flags #1"); | |
652 | printf_filtered (" (sm) %d", (psw & PSW_SM) != 0); | |
653 | printf_filtered (" (ea) %d", (psw & PSW_EA) != 0); | |
654 | printf_filtered (" (db) %d", (psw & PSW_DB) != 0); | |
655 | printf_filtered (" (ds) %d", (psw & PSW_DS) != 0); | |
656 | printf_filtered (" (ie) %d", (psw & PSW_IE) != 0); | |
657 | printf_filtered (" (rp) %d", (psw & PSW_RP) != 0); | |
658 | printf_filtered (" (md) %d\n", (psw & PSW_MD) != 0); | |
659 | ||
660 | printf_filtered ("flags #2"); | |
661 | printf_filtered (" (f0) %d", (psw & PSW_F0) != 0); | |
662 | printf_filtered (" (f1) %d", (psw & PSW_F1) != 0); | |
663 | printf_filtered (" (f2) %d", (psw & PSW_F2) != 0); | |
664 | printf_filtered (" (f3) %d", (psw & PSW_F3) != 0); | |
665 | printf_filtered (" (s) %d", (psw & PSW_S) != 0); | |
666 | printf_filtered (" (v) %d", (psw & PSW_V) != 0); | |
667 | printf_filtered (" (va) %d", (psw & PSW_VA) != 0); | |
668 | printf_filtered (" (c) %d\n", (psw & PSW_C) != 0); | |
669 | } | |
670 | ||
671 | static void | |
672 | print_flags_command (args, from_tty) | |
673 | char *args; | |
674 | int from_tty; | |
675 | { | |
676 | d30v_print_flags (); | |
677 | } | |
678 | ||
45a70ed6 SG |
679 | void |
680 | d30v_do_registers_info (regnum, fpregs) | |
681 | int regnum; | |
682 | int fpregs; | |
683 | { | |
684 | long long num1, num2; | |
5d62f957 | 685 | long psw; |
45a70ed6 SG |
686 | |
687 | if (regnum != -1) | |
688 | { | |
689 | if (reg_names[0] == NULL || reg_names[0][0] == '\000') | |
690 | return; | |
691 | ||
692 | printf_filtered ("%s ", reg_names[regnum]); | |
693 | d30v_print_register (regnum, 0); | |
694 | ||
695 | printf_filtered ("\n"); | |
696 | return; | |
697 | } | |
698 | ||
699 | /* Have to print all the registers. Format them nicely. */ | |
700 | ||
701 | printf_filtered ("PC="); | |
702 | print_address (read_pc (), gdb_stdout); | |
703 | ||
704 | printf_filtered (" PSW="); | |
705 | d30v_print_register (PSW_REGNUM, 1); | |
706 | ||
707 | printf_filtered (" BPC="); | |
708 | print_address (read_register (BPC_REGNUM), gdb_stdout); | |
709 | ||
710 | printf_filtered (" BPSW="); | |
711 | d30v_print_register (BPSW_REGNUM, 1); | |
712 | printf_filtered ("\n"); | |
713 | ||
714 | printf_filtered ("DPC="); | |
715 | print_address (read_register (DPC_REGNUM), gdb_stdout); | |
716 | ||
717 | printf_filtered (" DPSW="); | |
718 | d30v_print_register (DPSW_REGNUM, 1); | |
719 | ||
720 | printf_filtered (" IBA="); | |
721 | print_address (read_register (IBA_REGNUM), gdb_stdout); | |
722 | printf_filtered ("\n"); | |
723 | ||
724 | printf_filtered ("RPT_C="); | |
725 | d30v_print_register (RPT_C_REGNUM, 1); | |
726 | ||
727 | printf_filtered (" RPT_S="); | |
728 | print_address (read_register (RPT_S_REGNUM), gdb_stdout); | |
729 | ||
730 | printf_filtered (" RPT_E="); | |
731 | print_address (read_register (RPT_E_REGNUM), gdb_stdout); | |
732 | printf_filtered ("\n"); | |
733 | ||
734 | printf_filtered ("MOD_S="); | |
735 | print_address (read_register (MOD_S_REGNUM), gdb_stdout); | |
736 | ||
737 | printf_filtered (" MOD_E="); | |
738 | print_address (read_register (MOD_E_REGNUM), gdb_stdout); | |
739 | printf_filtered ("\n"); | |
740 | ||
741 | printf_filtered ("EIT_VB="); | |
742 | print_address (read_register (EIT_VB_REGNUM), gdb_stdout); | |
743 | ||
744 | printf_filtered (" INT_S="); | |
745 | d30v_print_register (INT_S_REGNUM, 1); | |
746 | ||
747 | printf_filtered (" INT_M="); | |
748 | d30v_print_register (INT_M_REGNUM, 1); | |
749 | printf_filtered ("\n"); | |
750 | ||
5d62f957 | 751 | d30v_print_flags (); |
45a70ed6 SG |
752 | for (regnum = 0; regnum <= 63;) |
753 | { | |
754 | int i; | |
755 | ||
756 | printf_filtered ("R%d-R%d ", regnum, regnum + 7); | |
757 | if (regnum < 10) | |
758 | printf_filtered (" "); | |
759 | if (regnum + 7 < 10) | |
760 | printf_filtered (" "); | |
761 | ||
762 | for (i = 0; i < 8; i++) | |
763 | { | |
764 | printf_filtered (" "); | |
765 | d30v_print_register (regnum++, 1); | |
766 | } | |
767 | ||
768 | printf_filtered ("\n"); | |
769 | } | |
770 | ||
771 | printf_filtered ("A0-A1 "); | |
772 | ||
773 | d30v_print_register (A0_REGNUM, 1); | |
774 | printf_filtered (" "); | |
775 | d30v_print_register (A1_REGNUM, 1); | |
776 | printf_filtered ("\n"); | |
777 | } | |
778 | ||
779 | CORE_ADDR | |
780 | d30v_fix_call_dummy (dummyname, start_sp, fun, nargs, args, type, gcc_p) | |
781 | char *dummyname; | |
782 | CORE_ADDR start_sp; | |
783 | CORE_ADDR fun; | |
784 | int nargs; | |
785 | value_ptr *args; | |
786 | struct type *type; | |
787 | int gcc_p; | |
788 | { | |
789 | int regnum; | |
790 | CORE_ADDR sp; | |
791 | char buffer[MAX_REGISTER_RAW_SIZE]; | |
792 | struct frame_info *frame = get_current_frame (); | |
793 | frame->dummy = start_sp; | |
7359fb1d | 794 | /*start_sp |= DMEM_START;*/ |
45a70ed6 SG |
795 | |
796 | sp = start_sp; | |
797 | for (regnum = 0; regnum < NUM_REGS; regnum++) | |
798 | { | |
799 | sp -= REGISTER_RAW_SIZE(regnum); | |
800 | store_address (buffer, REGISTER_RAW_SIZE(regnum), read_register(regnum)); | |
801 | write_memory (sp, buffer, REGISTER_RAW_SIZE(regnum)); | |
802 | } | |
7359fb1d | 803 | write_register (SP_REGNUM, (LONGEST)sp); |
45a70ed6 | 804 | /* now we need to load LR with the return address */ |
7359fb1d | 805 | write_register (LR_REGNUM, (LONGEST)d30v_call_dummy_address()); |
45a70ed6 SG |
806 | return sp; |
807 | } | |
808 | ||
809 | static void | |
810 | d30v_pop_dummy_frame (fi) | |
811 | struct frame_info *fi; | |
812 | { | |
813 | CORE_ADDR sp = fi->dummy; | |
814 | int regnum; | |
815 | ||
816 | for (regnum = 0; regnum < NUM_REGS; regnum++) | |
817 | { | |
818 | sp -= REGISTER_RAW_SIZE(regnum); | |
819 | write_register(regnum, read_memory_unsigned_integer (sp, REGISTER_RAW_SIZE(regnum))); | |
820 | } | |
821 | flush_cached_frames (); /* needed? */ | |
822 | } | |
823 | ||
824 | ||
825 | CORE_ADDR | |
826 | d30v_push_arguments (nargs, args, sp, struct_return, struct_addr) | |
827 | int nargs; | |
828 | value_ptr *args; | |
829 | CORE_ADDR sp; | |
830 | int struct_return; | |
831 | CORE_ADDR struct_addr; | |
832 | { | |
833 | int i, len, index=0, regnum=2; | |
834 | char buffer[4], *contents; | |
835 | LONGEST val; | |
836 | CORE_ADDR ptrs[10]; | |
837 | ||
7359fb1d | 838 | #if 0 |
45a70ed6 SG |
839 | /* Pass 1. Put all large args on stack */ |
840 | for (i = 0; i < nargs; i++) | |
841 | { | |
842 | value_ptr arg = args[i]; | |
843 | struct type *arg_type = check_typedef (VALUE_TYPE (arg)); | |
844 | len = TYPE_LENGTH (arg_type); | |
845 | contents = VALUE_CONTENTS(arg); | |
846 | val = extract_signed_integer (contents, len); | |
847 | if (len > 4) | |
848 | { | |
849 | /* put on stack and pass pointers */ | |
850 | sp -= len; | |
851 | write_memory (sp, contents, len); | |
852 | ptrs[index++] = sp; | |
853 | } | |
854 | } | |
7359fb1d | 855 | #endif |
45a70ed6 SG |
856 | index = 0; |
857 | ||
858 | for (i = 0; i < nargs; i++) | |
859 | { | |
860 | value_ptr arg = args[i]; | |
861 | struct type *arg_type = check_typedef (VALUE_TYPE (arg)); | |
862 | len = TYPE_LENGTH (arg_type); | |
863 | contents = VALUE_CONTENTS(arg); | |
864 | val = extract_signed_integer (contents, len); | |
865 | if (len > 4) | |
866 | { | |
7359fb1d DT |
867 | /* we need multiple registers */ |
868 | int ndx; | |
869 | ||
870 | for (ndx = 0; ndx < len; ndx += 4, len -= 4) | |
45a70ed6 | 871 | { |
7359fb1d DT |
872 | if (regnum < 18) |
873 | { | |
874 | if (len > 4) | |
875 | val = extract_signed_integer (&contents[ndx], 4); | |
876 | else | |
877 | val = extract_signed_integer (&contents[ndx], len); | |
878 | ||
879 | write_register (regnum++, val); | |
880 | } | |
881 | else | |
882 | { | |
883 | /* no more registers available. put it on the stack */ | |
884 | sp -= len; | |
885 | write_memory (sp, &contents[ndx], len); | |
886 | break; | |
887 | } | |
45a70ed6 SG |
888 | } |
889 | } | |
890 | else | |
891 | { | |
7359fb1d | 892 | if (regnum < 18 ) |
45a70ed6 | 893 | { |
7359fb1d | 894 | write_register (regnum++, val); |
45a70ed6 SG |
895 | } |
896 | else | |
897 | { | |
898 | sp -= len; | |
899 | store_address (buffer, len, val); | |
900 | write_memory (sp, buffer, len); | |
901 | } | |
902 | } | |
903 | } | |
904 | return sp; | |
905 | } | |
906 | ||
907 | ||
908 | /* pick an out-of-the-way place to set the return value */ | |
909 | /* for an inferior function call. The link register is set to this */ | |
910 | /* value and a momentary breakpoint is set there. When the breakpoint */ | |
911 | /* is hit, the dummy frame is popped and the previous environment is */ | |
912 | /* restored. */ | |
913 | ||
914 | CORE_ADDR | |
915 | d30v_call_dummy_address () | |
916 | { | |
917 | CORE_ADDR entry; | |
918 | struct minimal_symbol *sym; | |
919 | ||
920 | entry = entry_point_address (); | |
921 | ||
922 | if (entry != 0) | |
923 | return entry; | |
924 | ||
925 | sym = lookup_minimal_symbol ("_start", NULL, symfile_objfile); | |
926 | ||
927 | if (!sym || MSYMBOL_TYPE (sym) != mst_text) | |
928 | return 0; | |
929 | else | |
930 | return SYMBOL_VALUE_ADDRESS (sym); | |
931 | } | |
932 | ||
933 | /* Given a return value in `regbuf' with a type `valtype', | |
934 | extract and copy its value into `valbuf'. */ | |
935 | ||
936 | void | |
937 | d30v_extract_return_value (valtype, regbuf, valbuf) | |
938 | struct type *valtype; | |
939 | char regbuf[REGISTER_BYTES]; | |
940 | char *valbuf; | |
941 | { | |
942 | memcpy (valbuf, regbuf + REGISTER_BYTE (2), TYPE_LENGTH (valtype)); | |
943 | } | |
944 | ||
945 | /* The following code implements access to, and display of, the D30V's | |
946 | instruction trace buffer. The buffer consists of 64K or more | |
947 | 4-byte words of data, of which each words includes an 8-bit count, | |
948 | an 8-bit segment number, and a 16-bit instruction address. | |
949 | ||
950 | In theory, the trace buffer is continuously capturing instruction | |
951 | data that the CPU presents on its "debug bus", but in practice, the | |
952 | ROMified GDB stub only enables tracing when it continues or steps | |
953 | the program, and stops tracing when the program stops; so it | |
954 | actually works for GDB to read the buffer counter out of memory and | |
955 | then read each trace word. The counter records where the tracing | |
956 | stops, but there is no record of where it started, so we remember | |
957 | the PC when we resumed and then search backwards in the trace | |
958 | buffer for a word that includes that address. This is not perfect, | |
959 | because you will miss trace data if the resumption PC is the target | |
960 | of a branch. (The value of the buffer counter is semi-random, any | |
961 | trace data from a previous program stop is gone.) */ | |
962 | ||
963 | /* The address of the last word recorded in the trace buffer. */ | |
964 | ||
965 | #define DBBC_ADDR (0xd80000) | |
966 | ||
967 | /* The base of the trace buffer, at least for the "Board_0". */ | |
968 | ||
969 | #define TRACE_BUFFER_BASE (0xf40000) | |
970 | ||
971 | static void trace_command PARAMS ((char *, int)); | |
972 | ||
973 | static void untrace_command PARAMS ((char *, int)); | |
974 | ||
975 | static void trace_info PARAMS ((char *, int)); | |
976 | ||
977 | static void tdisassemble_command PARAMS ((char *, int)); | |
978 | ||
979 | static void display_trace PARAMS ((int, int)); | |
980 | ||
981 | /* True when instruction traces are being collected. */ | |
982 | ||
983 | static int tracing; | |
984 | ||
985 | /* Remembered PC. */ | |
986 | ||
987 | static CORE_ADDR last_pc; | |
988 | ||
989 | /* True when trace output should be displayed whenever program stops. */ | |
990 | ||
991 | static int trace_display; | |
992 | ||
993 | /* True when trace listing should include source lines. */ | |
994 | ||
995 | static int default_trace_show_source = 1; | |
996 | ||
997 | struct trace_buffer { | |
998 | int size; | |
999 | short *counts; | |
1000 | CORE_ADDR *addrs; | |
1001 | } trace_data; | |
1002 | ||
1003 | static void | |
1004 | trace_command (args, from_tty) | |
1005 | char *args; | |
1006 | int from_tty; | |
1007 | { | |
1008 | /* Clear the host-side trace buffer, allocating space if needed. */ | |
1009 | trace_data.size = 0; | |
1010 | if (trace_data.counts == NULL) | |
1011 | trace_data.counts = (short *) xmalloc (65536 * sizeof(short)); | |
1012 | if (trace_data.addrs == NULL) | |
1013 | trace_data.addrs = (CORE_ADDR *) xmalloc (65536 * sizeof(CORE_ADDR)); | |
1014 | ||
1015 | tracing = 1; | |
1016 | ||
1017 | printf_filtered ("Tracing is now on.\n"); | |
1018 | } | |
1019 | ||
1020 | static void | |
1021 | untrace_command (args, from_tty) | |
1022 | char *args; | |
1023 | int from_tty; | |
1024 | { | |
1025 | tracing = 0; | |
1026 | ||
1027 | printf_filtered ("Tracing is now off.\n"); | |
1028 | } | |
1029 | ||
1030 | static void | |
1031 | trace_info (args, from_tty) | |
1032 | char *args; | |
1033 | int from_tty; | |
1034 | { | |
1035 | int i; | |
1036 | ||
1037 | if (trace_data.size) | |
1038 | { | |
1039 | printf_filtered ("%d entries in trace buffer:\n", trace_data.size); | |
1040 | ||
1041 | for (i = 0; i < trace_data.size; ++i) | |
1042 | { | |
1043 | printf_filtered ("%d: %d instruction%s at 0x%x\n", | |
1044 | i, trace_data.counts[i], | |
1045 | (trace_data.counts[i] == 1 ? "" : "s"), | |
1046 | trace_data.addrs[i]); | |
1047 | } | |
1048 | } | |
1049 | else | |
1050 | printf_filtered ("No entries in trace buffer.\n"); | |
1051 | ||
1052 | printf_filtered ("Tracing is currently %s.\n", (tracing ? "on" : "off")); | |
1053 | } | |
1054 | ||
1055 | /* Print the instruction at address MEMADDR in debugged memory, | |
1056 | on STREAM. Returns length of the instruction, in bytes. */ | |
1057 | ||
1058 | static int | |
1059 | print_insn (memaddr, stream) | |
1060 | CORE_ADDR memaddr; | |
1061 | GDB_FILE *stream; | |
1062 | { | |
1063 | /* If there's no disassembler, something is very wrong. */ | |
1064 | if (tm_print_insn == NULL) | |
1065 | abort (); | |
1066 | ||
1067 | if (TARGET_BYTE_ORDER == BIG_ENDIAN) | |
1068 | tm_print_insn_info.endian = BFD_ENDIAN_BIG; | |
1069 | else | |
1070 | tm_print_insn_info.endian = BFD_ENDIAN_LITTLE; | |
1071 | return (*tm_print_insn) (memaddr, &tm_print_insn_info); | |
1072 | } | |
1073 | ||
1074 | void | |
1075 | d30v_eva_prepare_to_trace () | |
1076 | { | |
1077 | if (!tracing) | |
1078 | return; | |
1079 | ||
1080 | last_pc = read_register (PC_REGNUM); | |
1081 | } | |
1082 | ||
1083 | /* Collect trace data from the target board and format it into a form | |
1084 | more useful for display. */ | |
1085 | ||
1086 | void | |
1087 | d30v_eva_get_trace_data () | |
1088 | { | |
1089 | int count, i, j, oldsize; | |
1090 | int trace_addr, trace_seg, trace_cnt, next_cnt; | |
1091 | unsigned int last_trace, trace_word, next_word; | |
1092 | unsigned int *tmpspace; | |
1093 | ||
1094 | if (!tracing) | |
1095 | return; | |
1096 | ||
1097 | tmpspace = xmalloc (65536 * sizeof(unsigned int)); | |
1098 | ||
1099 | last_trace = read_memory_unsigned_integer (DBBC_ADDR, 2) << 2; | |
1100 | ||
1101 | /* Collect buffer contents from the target, stopping when we reach | |
1102 | the word recorded when execution resumed. */ | |
1103 | ||
1104 | count = 0; | |
1105 | while (last_trace > 0) | |
1106 | { | |
1107 | QUIT; | |
1108 | trace_word = | |
1109 | read_memory_unsigned_integer (TRACE_BUFFER_BASE + last_trace, 4); | |
1110 | trace_addr = trace_word & 0xffff; | |
1111 | last_trace -= 4; | |
1112 | /* Ignore an apparently nonsensical entry. */ | |
1113 | if (trace_addr == 0xffd5) | |
1114 | continue; | |
1115 | tmpspace[count++] = trace_word; | |
1116 | if (trace_addr == last_pc) | |
1117 | break; | |
1118 | if (count > 65535) | |
1119 | break; | |
1120 | } | |
1121 | ||
1122 | /* Move the data to the host-side trace buffer, adjusting counts to | |
1123 | include the last instruction executed and transforming the address | |
1124 | into something that GDB likes. */ | |
1125 | ||
1126 | for (i = 0; i < count; ++i) | |
1127 | { | |
1128 | trace_word = tmpspace[i]; | |
1129 | next_word = ((i == 0) ? 0 : tmpspace[i - 1]); | |
1130 | trace_addr = trace_word & 0xffff; | |
1131 | next_cnt = (next_word >> 24) & 0xff; | |
1132 | j = trace_data.size + count - i - 1; | |
1133 | trace_data.addrs[j] = (trace_addr << 2) + 0x1000000; | |
1134 | trace_data.counts[j] = next_cnt + 1; | |
1135 | } | |
1136 | ||
1137 | oldsize = trace_data.size; | |
1138 | trace_data.size += count; | |
1139 | ||
1140 | free (tmpspace); | |
1141 | ||
1142 | if (trace_display) | |
1143 | display_trace (oldsize, trace_data.size); | |
1144 | } | |
1145 | ||
1146 | static void | |
1147 | tdisassemble_command (arg, from_tty) | |
1148 | char *arg; | |
1149 | int from_tty; | |
1150 | { | |
1151 | int i, count; | |
1152 | CORE_ADDR low, high; | |
1153 | char *space_index; | |
1154 | ||
1155 | if (!arg) | |
1156 | { | |
1157 | low = 0; | |
1158 | high = trace_data.size; | |
1159 | } | |
1160 | else if (!(space_index = (char *) strchr (arg, ' '))) | |
1161 | { | |
1162 | low = parse_and_eval_address (arg); | |
1163 | high = low + 5; | |
1164 | } | |
1165 | else | |
1166 | { | |
1167 | /* Two arguments. */ | |
1168 | *space_index = '\0'; | |
1169 | low = parse_and_eval_address (arg); | |
1170 | high = parse_and_eval_address (space_index + 1); | |
1171 | if (high < low) | |
1172 | high = low; | |
1173 | } | |
1174 | ||
1175 | printf_filtered ("Dump of trace from %d to %d:\n", low, high); | |
1176 | ||
1177 | display_trace (low, high); | |
1178 | ||
1179 | printf_filtered ("End of trace dump.\n"); | |
1180 | gdb_flush (gdb_stdout); | |
1181 | } | |
1182 | ||
1183 | static void | |
1184 | display_trace (low, high) | |
1185 | int low, high; | |
1186 | { | |
1187 | int i, count, trace_show_source, first, suppress; | |
1188 | CORE_ADDR next_address; | |
1189 | ||
1190 | trace_show_source = default_trace_show_source; | |
1191 | if (!have_full_symbols () && !have_partial_symbols()) | |
1192 | { | |
1193 | trace_show_source = 0; | |
1194 | printf_filtered ("No symbol table is loaded. Use the \"file\" command.\n"); | |
1195 | printf_filtered ("Trace will not display any source.\n"); | |
1196 | } | |
1197 | ||
1198 | first = 1; | |
1199 | suppress = 0; | |
1200 | for (i = low; i < high; ++i) | |
1201 | { | |
1202 | next_address = trace_data.addrs[i]; | |
1203 | count = trace_data.counts[i]; | |
1204 | while (count-- > 0) | |
1205 | { | |
1206 | QUIT; | |
1207 | if (trace_show_source) | |
1208 | { | |
1209 | struct symtab_and_line sal, sal_prev; | |
1210 | ||
1211 | sal_prev = find_pc_line (next_address - 4, 0); | |
1212 | sal = find_pc_line (next_address, 0); | |
1213 | ||
1214 | if (sal.symtab) | |
1215 | { | |
1216 | if (first || sal.line != sal_prev.line) | |
1217 | print_source_lines (sal.symtab, sal.line, sal.line + 1, 0); | |
1218 | suppress = 0; | |
1219 | } | |
1220 | else | |
1221 | { | |
1222 | if (!suppress) | |
1223 | /* FIXME-32x64--assumes sal.pc fits in long. */ | |
1224 | printf_filtered ("No source file for address %s.\n", | |
1225 | local_hex_string((unsigned long) sal.pc)); | |
1226 | suppress = 1; | |
1227 | } | |
1228 | } | |
1229 | first = 0; | |
1230 | print_address (next_address, gdb_stdout); | |
1231 | printf_filtered (":"); | |
1232 | printf_filtered ("\t"); | |
1233 | wrap_here (" "); | |
1234 | next_address = next_address + print_insn (next_address, gdb_stdout); | |
1235 | printf_filtered ("\n"); | |
1236 | gdb_flush (gdb_stdout); | |
1237 | } | |
1238 | } | |
1239 | } | |
1240 | ||
1241 | extern void (*target_resume_hook) PARAMS ((void)); | |
1242 | extern void (*target_wait_loop_hook) PARAMS ((void)); | |
1243 | ||
1244 | void | |
1245 | _initialize_d30v_tdep () | |
1246 | { | |
1247 | tm_print_insn = print_insn_d30v; | |
1248 | ||
1249 | target_resume_hook = d30v_eva_prepare_to_trace; | |
1250 | target_wait_loop_hook = d30v_eva_get_trace_data; | |
1251 | ||
5d62f957 MM |
1252 | add_info ("flags", print_flags_command, "Print d30v flags."); |
1253 | ||
45a70ed6 SG |
1254 | add_com ("trace", class_support, trace_command, |
1255 | "Enable tracing of instruction execution."); | |
1256 | ||
1257 | add_com ("untrace", class_support, untrace_command, | |
7359fb1d | 1258 | "Disable tracing of instruction execution."); |
45a70ed6 SG |
1259 | |
1260 | add_com ("tdisassemble", class_vars, tdisassemble_command, | |
1261 | "Disassemble the trace buffer.\n\ | |
1262 | Two optional arguments specify a range of trace buffer entries\n\ | |
1263 | as reported by info trace (NOT addresses!)."); | |
1264 | ||
1265 | add_info ("trace", trace_info, | |
1266 | "Display info about the trace data buffer."); | |
1267 | ||
1268 | add_show_from_set (add_set_cmd ("tracedisplay", no_class, | |
1269 | var_integer, (char *)&trace_display, | |
1270 | "Set automatic display of trace.\n", &setlist), | |
1271 | &showlist); | |
1272 | add_show_from_set (add_set_cmd ("tracesource", no_class, | |
1273 | var_integer, (char *)&default_trace_show_source, | |
1274 | "Set display of source code with trace.\n", &setlist), | |
1275 | &showlist); | |
1276 | ||
1277 | } |