Commit | Line | Data |
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f0bdd87d YS |
1 | /* Target-machine dependent code for Renesas H8/300, for GDB. |
2 | ||
6aba47ca | 3 | Copyright (C) 1988, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, |
0fb0cc75 JB |
4 | 2000, 2001, 2002, 2003, 2005, 2007, 2008, 2009 |
5 | Free Software Foundation, Inc. | |
f0bdd87d YS |
6 | |
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
f0bdd87d YS |
12 | (at your option) any later version. |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
f0bdd87d YS |
21 | |
22 | /* | |
23 | Contributed by Steve Chamberlain | |
24 | sac@cygnus.com | |
25 | */ | |
26 | ||
27 | #include "defs.h" | |
28 | #include "value.h" | |
f0bdd87d YS |
29 | #include "arch-utils.h" |
30 | #include "regcache.h" | |
31 | #include "gdbcore.h" | |
32 | #include "objfiles.h" | |
f0bdd87d YS |
33 | #include "gdb_assert.h" |
34 | #include "dis-asm.h" | |
35 | #include "dwarf2-frame.h" | |
f0bdd87d YS |
36 | #include "frame-base.h" |
37 | #include "frame-unwind.h" | |
38 | ||
f0bdd87d YS |
39 | enum gdb_regnum |
40 | { | |
41 | E_R0_REGNUM, E_ER0_REGNUM = E_R0_REGNUM, E_ARG0_REGNUM = E_R0_REGNUM, | |
42 | E_RET0_REGNUM = E_R0_REGNUM, | |
43 | E_R1_REGNUM, E_ER1_REGNUM = E_R1_REGNUM, E_RET1_REGNUM = E_R1_REGNUM, | |
44 | E_R2_REGNUM, E_ER2_REGNUM = E_R2_REGNUM, E_ARGLAST_REGNUM = E_R2_REGNUM, | |
45 | E_R3_REGNUM, E_ER3_REGNUM = E_R3_REGNUM, | |
46 | E_R4_REGNUM, E_ER4_REGNUM = E_R4_REGNUM, | |
47 | E_R5_REGNUM, E_ER5_REGNUM = E_R5_REGNUM, | |
48 | E_R6_REGNUM, E_ER6_REGNUM = E_R6_REGNUM, E_FP_REGNUM = E_R6_REGNUM, | |
49 | E_SP_REGNUM, | |
50 | E_CCR_REGNUM, | |
51 | E_PC_REGNUM, | |
52 | E_CYCLES_REGNUM, | |
53 | E_TICK_REGNUM, E_EXR_REGNUM = E_TICK_REGNUM, | |
54 | E_INST_REGNUM, E_TICKS_REGNUM = E_INST_REGNUM, | |
55 | E_INSTS_REGNUM, | |
56 | E_MACH_REGNUM, | |
57 | E_MACL_REGNUM, | |
58 | E_SBR_REGNUM, | |
59 | E_VBR_REGNUM | |
60 | }; | |
61 | ||
62 | #define H8300_MAX_NUM_REGS 18 | |
63 | ||
be8626e0 MD |
64 | #define E_PSEUDO_CCR_REGNUM(gdbarch) (gdbarch_num_regs (gdbarch)) |
65 | #define E_PSEUDO_EXR_REGNUM(gdbarch) (gdbarch_num_regs (gdbarch)+1) | |
f0bdd87d | 66 | |
862ba188 CV |
67 | struct h8300_frame_cache |
68 | { | |
69 | /* Base address. */ | |
70 | CORE_ADDR base; | |
71 | CORE_ADDR sp_offset; | |
72 | CORE_ADDR pc; | |
73 | ||
74 | /* Flag showing that a frame has been created in the prologue code. */ | |
75 | int uses_fp; | |
f0bdd87d | 76 | |
862ba188 CV |
77 | /* Saved registers. */ |
78 | CORE_ADDR saved_regs[H8300_MAX_NUM_REGS]; | |
79 | CORE_ADDR saved_sp; | |
80 | }; | |
81 | ||
82 | enum | |
83 | { | |
84 | h8300_reg_size = 2, | |
85 | h8300h_reg_size = 4, | |
86 | h8300_max_reg_size = 4, | |
87 | }; | |
88 | ||
89 | static int is_h8300hmode (struct gdbarch *gdbarch); | |
90 | static int is_h8300smode (struct gdbarch *gdbarch); | |
91 | static int is_h8300sxmode (struct gdbarch *gdbarch); | |
92 | static int is_h8300_normal_mode (struct gdbarch *gdbarch); | |
93 | ||
be8626e0 MD |
94 | #define BINWORD(gdbarch) ((is_h8300hmode (gdbarch) \ |
95 | && !is_h8300_normal_mode (gdbarch)) \ | |
862ba188 CV |
96 | ? h8300h_reg_size : h8300_reg_size) |
97 | ||
98 | static CORE_ADDR | |
99 | h8300_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame) | |
100 | { | |
101 | return frame_unwind_register_unsigned (next_frame, E_PC_REGNUM); | |
102 | } | |
103 | ||
104 | static CORE_ADDR | |
105 | h8300_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame) | |
106 | { | |
107 | return frame_unwind_register_unsigned (next_frame, E_SP_REGNUM); | |
108 | } | |
109 | ||
110 | static struct frame_id | |
94afd7a6 | 111 | h8300_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame) |
862ba188 | 112 | { |
94afd7a6 UW |
113 | CORE_ADDR sp = get_frame_register_unsigned (this_frame, E_SP_REGNUM); |
114 | return frame_id_build (sp, get_frame_pc (this_frame)); | |
862ba188 CV |
115 | } |
116 | ||
117 | /* Normal frames. */ | |
118 | ||
119 | /* Allocate and initialize a frame cache. */ | |
120 | ||
121 | static void | |
be8626e0 MD |
122 | h8300_init_frame_cache (struct gdbarch *gdbarch, |
123 | struct h8300_frame_cache *cache) | |
862ba188 CV |
124 | { |
125 | int i; | |
126 | ||
127 | /* Base address. */ | |
128 | cache->base = 0; | |
129 | cache->sp_offset = 0; | |
130 | cache->pc = 0; | |
131 | ||
132 | /* Frameless until proven otherwise. */ | |
133 | cache->uses_fp = 0; | |
134 | ||
135 | /* Saved registers. We initialize these to -1 since zero is a valid | |
136 | offset (that's where %fp is supposed to be stored). */ | |
be8626e0 | 137 | for (i = 0; i < gdbarch_num_regs (gdbarch); i++) |
862ba188 CV |
138 | cache->saved_regs[i] = -1; |
139 | } | |
140 | ||
141 | #define IS_MOVB_RnRm(x) (((x) & 0xff88) == 0x0c88) | |
142 | #define IS_MOVW_RnRm(x) (((x) & 0xff88) == 0x0d00) | |
143 | #define IS_MOVL_RnRm(x) (((x) & 0xff88) == 0x0f80) | |
144 | #define IS_MOVB_Rn16_SP(x) (((x) & 0xfff0) == 0x6ee0) | |
145 | #define IS_MOVB_EXT(x) ((x) == 0x7860) | |
146 | #define IS_MOVB_Rn24_SP(x) (((x) & 0xfff0) == 0x6aa0) | |
147 | #define IS_MOVW_Rn16_SP(x) (((x) & 0xfff0) == 0x6fe0) | |
148 | #define IS_MOVW_EXT(x) ((x) == 0x78e0) | |
149 | #define IS_MOVW_Rn24_SP(x) (((x) & 0xfff0) == 0x6ba0) | |
150 | /* Same instructions as mov.w, just prefixed with 0x0100 */ | |
151 | #define IS_MOVL_PRE(x) ((x) == 0x0100) | |
152 | #define IS_MOVL_Rn16_SP(x) (((x) & 0xfff0) == 0x6fe0) | |
153 | #define IS_MOVL_EXT(x) ((x) == 0x78e0) | |
154 | #define IS_MOVL_Rn24_SP(x) (((x) & 0xfff0) == 0x6ba0) | |
155 | ||
156 | #define IS_PUSHFP_MOVESPFP(x) ((x) == 0x6df60d76) | |
157 | #define IS_PUSH_FP(x) ((x) == 0x01006df6) | |
158 | #define IS_MOV_SP_FP(x) ((x) == 0x0ff6) | |
159 | #define IS_SUB2_SP(x) ((x) == 0x1b87) | |
160 | #define IS_SUB4_SP(x) ((x) == 0x1b97) | |
161 | #define IS_ADD_IMM_SP(x) ((x) == 0x7a1f) | |
162 | #define IS_SUB_IMM_SP(x) ((x) == 0x7a3f) | |
163 | #define IS_SUBL4_SP(x) ((x) == 0x1acf) | |
164 | #define IS_MOV_IMM_Rn(x) (((x) & 0xfff0) == 0x7905) | |
165 | #define IS_SUB_RnSP(x) (((x) & 0xff0f) == 0x1907) | |
166 | #define IS_ADD_RnSP(x) (((x) & 0xff0f) == 0x0907) | |
167 | #define IS_PUSH(x) (((x) & 0xfff0) == 0x6df0) | |
f0bdd87d YS |
168 | |
169 | /* If the instruction at PC is an argument register spill, return its | |
170 | length. Otherwise, return zero. | |
171 | ||
172 | An argument register spill is an instruction that moves an argument | |
173 | from the register in which it was passed to the stack slot in which | |
174 | it really lives. It is a byte, word, or longword move from an | |
175 | argument register to a negative offset from the frame pointer. | |
176 | ||
177 | CV, 2003-06-16: Or, in optimized code or when the `register' qualifier | |
178 | is used, it could be a byte, word or long move to registers r3-r5. */ | |
179 | ||
180 | static int | |
181 | h8300_is_argument_spill (CORE_ADDR pc) | |
182 | { | |
183 | int w = read_memory_unsigned_integer (pc, 2); | |
184 | ||
862ba188 | 185 | if ((IS_MOVB_RnRm (w) || IS_MOVW_RnRm (w) || IS_MOVL_RnRm (w)) |
f0bdd87d YS |
186 | && (w & 0x70) <= 0x20 /* Rs is R0, R1 or R2 */ |
187 | && (w & 0x7) >= 0x3 && (w & 0x7) <= 0x5) /* Rd is R3, R4 or R5 */ | |
188 | return 2; | |
189 | ||
862ba188 | 190 | if (IS_MOVB_Rn16_SP (w) |
f0bdd87d YS |
191 | && 8 <= (w & 0xf) && (w & 0xf) <= 10) /* Rs is R0L, R1L, or R2L */ |
192 | { | |
862ba188 | 193 | if (read_memory_integer (pc + 2, 2) < 0) /* ... and d:16 is negative. */ |
f0bdd87d YS |
194 | return 4; |
195 | } | |
862ba188 | 196 | else if (IS_MOVB_EXT (w)) |
f0bdd87d | 197 | { |
862ba188 | 198 | if (IS_MOVB_Rn24_SP (read_memory_unsigned_integer (pc + 2, 2))) |
f0bdd87d YS |
199 | { |
200 | LONGEST disp = read_memory_integer (pc + 4, 4); | |
201 | ||
202 | /* ... and d:24 is negative. */ | |
203 | if (disp < 0 && disp > 0xffffff) | |
204 | return 8; | |
205 | } | |
206 | } | |
862ba188 | 207 | else if (IS_MOVW_Rn16_SP (w) |
f0bdd87d YS |
208 | && (w & 0xf) <= 2) /* Rs is R0, R1, or R2 */ |
209 | { | |
f0bdd87d | 210 | /* ... and d:16 is negative. */ |
862ba188 | 211 | if (read_memory_integer (pc + 2, 2) < 0) |
f0bdd87d YS |
212 | return 4; |
213 | } | |
862ba188 | 214 | else if (IS_MOVW_EXT (w)) |
f0bdd87d | 215 | { |
862ba188 | 216 | if (IS_MOVW_Rn24_SP (read_memory_unsigned_integer (pc + 2, 2))) |
f0bdd87d YS |
217 | { |
218 | LONGEST disp = read_memory_integer (pc + 4, 4); | |
219 | ||
220 | /* ... and d:24 is negative. */ | |
221 | if (disp < 0 && disp > 0xffffff) | |
222 | return 8; | |
223 | } | |
224 | } | |
862ba188 | 225 | else if (IS_MOVL_PRE (w)) |
f0bdd87d YS |
226 | { |
227 | int w2 = read_memory_integer (pc + 2, 2); | |
228 | ||
862ba188 | 229 | if (IS_MOVL_Rn16_SP (w2) |
f0bdd87d YS |
230 | && (w2 & 0xf) <= 2) /* Rs is ER0, ER1, or ER2 */ |
231 | { | |
f0bdd87d | 232 | /* ... and d:16 is negative. */ |
862ba188 | 233 | if (read_memory_integer (pc + 4, 2) < 0) |
f0bdd87d YS |
234 | return 6; |
235 | } | |
862ba188 | 236 | else if (IS_MOVL_EXT (w2)) |
f0bdd87d YS |
237 | { |
238 | int w3 = read_memory_integer (pc + 4, 2); | |
239 | ||
862ba188 | 240 | if (IS_MOVL_Rn24_SP (read_memory_integer (pc + 4, 2))) |
f0bdd87d YS |
241 | { |
242 | LONGEST disp = read_memory_integer (pc + 6, 4); | |
243 | ||
244 | /* ... and d:24 is negative. */ | |
245 | if (disp < 0 && disp > 0xffffff) | |
246 | return 10; | |
247 | } | |
248 | } | |
249 | } | |
250 | ||
251 | return 0; | |
252 | } | |
253 | ||
f0bdd87d YS |
254 | /* Do a full analysis of the prologue at PC and update CACHE |
255 | accordingly. Bail out early if CURRENT_PC is reached. Return the | |
256 | address where the analysis stopped. | |
257 | ||
258 | We handle all cases that can be generated by gcc. | |
259 | ||
260 | For allocating a stack frame: | |
261 | ||
262 | mov.w r6,@-sp | |
263 | mov.w sp,r6 | |
264 | mov.w #-n,rN | |
265 | add.w rN,sp | |
266 | ||
267 | mov.w r6,@-sp | |
268 | mov.w sp,r6 | |
269 | subs #2,sp | |
270 | (repeat) | |
271 | ||
272 | mov.l er6,@-sp | |
273 | mov.l sp,er6 | |
274 | add.l #-n,sp | |
275 | ||
276 | mov.w r6,@-sp | |
277 | mov.w sp,r6 | |
278 | subs #4,sp | |
279 | (repeat) | |
280 | ||
281 | For saving registers: | |
282 | ||
283 | mov.w rN,@-sp | |
284 | mov.l erN,@-sp | |
285 | stm.l reglist,@-sp | |
286 | ||
f0bdd87d YS |
287 | */ |
288 | ||
289 | static CORE_ADDR | |
290 | h8300_analyze_prologue (CORE_ADDR pc, CORE_ADDR current_pc, | |
291 | struct h8300_frame_cache *cache) | |
292 | { | |
293 | unsigned int op; | |
862ba188 CV |
294 | int regno, i, spill_size; |
295 | ||
296 | cache->sp_offset = 0; | |
f0bdd87d | 297 | |
f0bdd87d YS |
298 | if (pc >= current_pc) |
299 | return current_pc; | |
300 | ||
862ba188 CV |
301 | op = read_memory_unsigned_integer (pc, 4); |
302 | ||
303 | if (IS_PUSHFP_MOVESPFP (op)) | |
304 | { | |
305 | cache->saved_regs[E_FP_REGNUM] = 0; | |
306 | cache->uses_fp = 1; | |
307 | pc += 4; | |
308 | } | |
309 | else if (IS_PUSH_FP (op)) | |
310 | { | |
311 | cache->saved_regs[E_FP_REGNUM] = 0; | |
312 | pc += 4; | |
313 | if (pc >= current_pc) | |
314 | return current_pc; | |
315 | op = read_memory_unsigned_integer (pc, 2); | |
316 | if (IS_MOV_SP_FP (op)) | |
317 | { | |
318 | cache->uses_fp = 1; | |
319 | pc += 2; | |
320 | } | |
321 | } | |
322 | ||
323 | while (pc < current_pc) | |
324 | { | |
325 | op = read_memory_unsigned_integer (pc, 2); | |
326 | if (IS_SUB2_SP (op)) | |
327 | { | |
328 | cache->sp_offset += 2; | |
329 | pc += 2; | |
330 | } | |
331 | else if (IS_SUB4_SP (op)) | |
332 | { | |
333 | cache->sp_offset += 4; | |
334 | pc += 2; | |
335 | } | |
336 | else if (IS_ADD_IMM_SP (op)) | |
337 | { | |
338 | cache->sp_offset += -read_memory_integer (pc + 2, 2); | |
339 | pc += 4; | |
340 | } | |
341 | else if (IS_SUB_IMM_SP (op)) | |
342 | { | |
343 | cache->sp_offset += read_memory_integer (pc + 2, 2); | |
344 | pc += 4; | |
345 | } | |
346 | else if (IS_SUBL4_SP (op)) | |
347 | { | |
348 | cache->sp_offset += 4; | |
349 | pc += 2; | |
350 | } | |
351 | else if (IS_MOV_IMM_Rn (op)) | |
352 | { | |
353 | int offset = read_memory_integer (pc + 2, 2); | |
354 | regno = op & 0x000f; | |
355 | op = read_memory_unsigned_integer (pc + 4, 2); | |
356 | if (IS_ADD_RnSP (op) && (op & 0x00f0) == regno) | |
357 | { | |
358 | cache->sp_offset -= offset; | |
359 | pc += 6; | |
360 | } | |
361 | else if (IS_SUB_RnSP (op) && (op & 0x00f0) == regno) | |
362 | { | |
363 | cache->sp_offset += offset; | |
364 | pc += 6; | |
365 | } | |
366 | else | |
367 | break; | |
368 | } | |
369 | else if (IS_PUSH (op)) | |
370 | { | |
371 | regno = op & 0x000f; | |
372 | cache->sp_offset += 2; | |
373 | cache->saved_regs[regno] = cache->sp_offset; | |
374 | pc += 2; | |
375 | } | |
376 | else if (op == 0x0100) | |
377 | { | |
378 | op = read_memory_unsigned_integer (pc + 2, 2); | |
379 | if (IS_PUSH (op)) | |
380 | { | |
381 | regno = op & 0x000f; | |
382 | cache->sp_offset += 4; | |
383 | cache->saved_regs[regno] = cache->sp_offset; | |
384 | pc += 4; | |
385 | } | |
386 | else | |
387 | break; | |
388 | } | |
389 | else if ((op & 0xffcf) == 0x0100) | |
390 | { | |
391 | int op1; | |
392 | op1 = read_memory_unsigned_integer (pc + 2, 2); | |
393 | if (IS_PUSH (op1)) | |
394 | { | |
395 | /* Since the prefix is 0x01x0, this is not a simple pushm but a | |
396 | stm.l reglist,@-sp */ | |
397 | i = ((op & 0x0030) >> 4) + 1; | |
398 | regno = op1 & 0x000f; | |
399 | for (; i > 0; regno++, --i) | |
400 | { | |
401 | cache->sp_offset += 4; | |
402 | cache->saved_regs[regno] = cache->sp_offset; | |
403 | } | |
404 | pc += 4; | |
405 | } | |
406 | else | |
407 | break; | |
408 | } | |
409 | else | |
410 | break; | |
411 | } | |
412 | ||
413 | /* Check for spilling an argument register to the stack frame. | |
414 | This could also be an initializing store from non-prologue code, | |
415 | but I don't think there's any harm in skipping that. */ | |
416 | while ((spill_size = h8300_is_argument_spill (pc)) > 0 | |
417 | && pc + spill_size <= current_pc) | |
418 | pc += spill_size; | |
f0bdd87d YS |
419 | |
420 | return pc; | |
421 | } | |
422 | ||
423 | static struct h8300_frame_cache * | |
94afd7a6 | 424 | h8300_frame_cache (struct frame_info *this_frame, void **this_cache) |
f0bdd87d | 425 | { |
94afd7a6 | 426 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
f0bdd87d YS |
427 | struct h8300_frame_cache *cache; |
428 | char buf[4]; | |
429 | int i; | |
862ba188 | 430 | CORE_ADDR current_pc; |
f0bdd87d YS |
431 | |
432 | if (*this_cache) | |
433 | return *this_cache; | |
434 | ||
862ba188 | 435 | cache = FRAME_OBSTACK_ZALLOC (struct h8300_frame_cache); |
be8626e0 | 436 | h8300_init_frame_cache (gdbarch, cache); |
f0bdd87d YS |
437 | *this_cache = cache; |
438 | ||
439 | /* In principle, for normal frames, %fp holds the frame pointer, | |
440 | which holds the base address for the current stack frame. | |
441 | However, for functions that don't need it, the frame pointer is | |
442 | optional. For these "frameless" functions the frame pointer is | |
862ba188 | 443 | actually the frame pointer of the calling frame. */ |
f0bdd87d | 444 | |
94afd7a6 | 445 | cache->base = get_frame_register_unsigned (this_frame, E_FP_REGNUM); |
f0bdd87d YS |
446 | if (cache->base == 0) |
447 | return cache; | |
448 | ||
be8626e0 | 449 | cache->saved_regs[E_PC_REGNUM] = -BINWORD (gdbarch); |
f0bdd87d | 450 | |
94afd7a6 UW |
451 | cache->pc = get_frame_func (this_frame); |
452 | current_pc = get_frame_pc (this_frame); | |
f0bdd87d | 453 | if (cache->pc != 0) |
862ba188 | 454 | h8300_analyze_prologue (cache->pc, current_pc, cache); |
f0bdd87d | 455 | |
862ba188 | 456 | if (!cache->uses_fp) |
f0bdd87d YS |
457 | { |
458 | /* We didn't find a valid frame, which means that CACHE->base | |
459 | currently holds the frame pointer for our calling frame. If | |
460 | we're at the start of a function, or somewhere half-way its | |
461 | prologue, the function's frame probably hasn't been fully | |
462 | setup yet. Try to reconstruct the base address for the stack | |
463 | frame by looking at the stack pointer. For truly "frameless" | |
464 | functions this might work too. */ | |
465 | ||
94afd7a6 | 466 | cache->base = get_frame_register_unsigned (this_frame, E_SP_REGNUM) |
862ba188 | 467 | + cache->sp_offset; |
be8626e0 | 468 | cache->saved_sp = cache->base + BINWORD (gdbarch); |
862ba188 CV |
469 | cache->saved_regs[E_PC_REGNUM] = 0; |
470 | } | |
471 | else | |
472 | { | |
be8626e0 MD |
473 | cache->saved_sp = cache->base + 2 * BINWORD (gdbarch); |
474 | cache->saved_regs[E_PC_REGNUM] = -BINWORD (gdbarch); | |
f0bdd87d | 475 | } |
f0bdd87d YS |
476 | |
477 | /* Adjust all the saved registers such that they contain addresses | |
478 | instead of offsets. */ | |
be8626e0 | 479 | for (i = 0; i < gdbarch_num_regs (gdbarch); i++) |
f0bdd87d | 480 | if (cache->saved_regs[i] != -1) |
862ba188 | 481 | cache->saved_regs[i] = cache->base - cache->saved_regs[i]; |
f0bdd87d YS |
482 | |
483 | return cache; | |
484 | } | |
485 | ||
486 | static void | |
94afd7a6 | 487 | h8300_frame_this_id (struct frame_info *this_frame, void **this_cache, |
f0bdd87d YS |
488 | struct frame_id *this_id) |
489 | { | |
490 | struct h8300_frame_cache *cache = | |
94afd7a6 | 491 | h8300_frame_cache (this_frame, this_cache); |
f0bdd87d YS |
492 | |
493 | /* This marks the outermost frame. */ | |
494 | if (cache->base == 0) | |
495 | return; | |
496 | ||
862ba188 | 497 | *this_id = frame_id_build (cache->saved_sp, cache->pc); |
f0bdd87d YS |
498 | } |
499 | ||
94afd7a6 UW |
500 | static struct value * |
501 | h8300_frame_prev_register (struct frame_info *this_frame, void **this_cache, | |
502 | int regnum) | |
f0bdd87d | 503 | { |
94afd7a6 | 504 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
f0bdd87d | 505 | struct h8300_frame_cache *cache = |
94afd7a6 | 506 | h8300_frame_cache (this_frame, this_cache); |
f0bdd87d YS |
507 | |
508 | gdb_assert (regnum >= 0); | |
509 | ||
510 | if (regnum == E_SP_REGNUM && cache->saved_sp) | |
94afd7a6 | 511 | return frame_unwind_got_constant (this_frame, regnum, cache->saved_sp); |
f0bdd87d | 512 | |
ea78bae4 | 513 | if (regnum < gdbarch_num_regs (gdbarch) |
f57d151a | 514 | && cache->saved_regs[regnum] != -1) |
94afd7a6 UW |
515 | return frame_unwind_got_memory (this_frame, regnum, |
516 | cache->saved_regs[regnum]); | |
f0bdd87d | 517 | |
94afd7a6 | 518 | return frame_unwind_got_register (this_frame, regnum, regnum); |
f0bdd87d YS |
519 | } |
520 | ||
521 | static const struct frame_unwind h8300_frame_unwind = { | |
522 | NORMAL_FRAME, | |
523 | h8300_frame_this_id, | |
94afd7a6 UW |
524 | h8300_frame_prev_register, |
525 | NULL, | |
526 | default_frame_sniffer | |
f0bdd87d YS |
527 | }; |
528 | ||
862ba188 | 529 | static CORE_ADDR |
94afd7a6 | 530 | h8300_frame_base_address (struct frame_info *this_frame, void **this_cache) |
862ba188 | 531 | { |
94afd7a6 | 532 | struct h8300_frame_cache *cache = h8300_frame_cache (this_frame, this_cache); |
862ba188 CV |
533 | return cache->base; |
534 | } | |
535 | ||
536 | static const struct frame_base h8300_frame_base = { | |
537 | &h8300_frame_unwind, | |
538 | h8300_frame_base_address, | |
539 | h8300_frame_base_address, | |
540 | h8300_frame_base_address | |
541 | }; | |
542 | ||
543 | static CORE_ADDR | |
6093d2eb | 544 | h8300_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc) |
862ba188 CV |
545 | { |
546 | CORE_ADDR func_addr = 0 , func_end = 0; | |
547 | ||
548 | if (find_pc_partial_function (pc, NULL, &func_addr, &func_end)) | |
549 | { | |
550 | struct symtab_and_line sal; | |
551 | struct h8300_frame_cache cache; | |
552 | ||
553 | /* Found a function. */ | |
554 | sal = find_pc_line (func_addr, 0); | |
555 | if (sal.end && sal.end < func_end) | |
556 | /* Found a line number, use it as end of prologue. */ | |
557 | return sal.end; | |
558 | ||
559 | /* No useable line symbol. Use prologue parsing method. */ | |
be8626e0 | 560 | h8300_init_frame_cache (gdbarch, &cache); |
862ba188 CV |
561 | return h8300_analyze_prologue (func_addr, func_end, &cache); |
562 | } | |
563 | ||
564 | /* No function symbol -- just return the PC. */ | |
565 | return (CORE_ADDR) pc; | |
566 | } | |
567 | ||
f0bdd87d YS |
568 | /* Function: push_dummy_call |
569 | Setup the function arguments for calling a function in the inferior. | |
570 | In this discussion, a `word' is 16 bits on the H8/300s, and 32 bits | |
571 | on the H8/300H. | |
572 | ||
573 | There are actually two ABI's here: -mquickcall (the default) and | |
574 | -mno-quickcall. With -mno-quickcall, all arguments are passed on | |
575 | the stack after the return address, word-aligned. With | |
576 | -mquickcall, GCC tries to use r0 -- r2 to pass registers. Since | |
577 | GCC doesn't indicate in the object file which ABI was used to | |
578 | compile it, GDB only supports the default --- -mquickcall. | |
579 | ||
580 | Here are the rules for -mquickcall, in detail: | |
581 | ||
582 | Each argument, whether scalar or aggregate, is padded to occupy a | |
583 | whole number of words. Arguments smaller than a word are padded at | |
584 | the most significant end; those larger than a word are padded at | |
585 | the least significant end. | |
586 | ||
587 | The initial arguments are passed in r0 -- r2. Earlier arguments go in | |
588 | lower-numbered registers. Multi-word arguments are passed in | |
589 | consecutive registers, with the most significant end in the | |
590 | lower-numbered register. | |
591 | ||
592 | If an argument doesn't fit entirely in the remaining registers, it | |
593 | is passed entirely on the stack. Stack arguments begin just after | |
594 | the return address. Once an argument has overflowed onto the stack | |
595 | this way, all subsequent arguments are passed on the stack. | |
596 | ||
597 | The above rule has odd consequences. For example, on the h8/300s, | |
598 | if a function takes two longs and an int as arguments: | |
599 | - the first long will be passed in r0/r1, | |
600 | - the second long will be passed entirely on the stack, since it | |
601 | doesn't fit in r2, | |
602 | - and the int will be passed on the stack, even though it could fit | |
603 | in r2. | |
604 | ||
605 | A weird exception: if an argument is larger than a word, but not a | |
606 | whole number of words in length (before padding), it is passed on | |
607 | the stack following the rules for stack arguments above, even if | |
608 | there are sufficient registers available to hold it. Stranger | |
609 | still, the argument registers are still `used up' --- even though | |
610 | there's nothing in them. | |
611 | ||
612 | So, for example, on the h8/300s, if a function expects a three-byte | |
613 | structure and an int, the structure will go on the stack, and the | |
614 | int will go in r2, not r0. | |
615 | ||
616 | If the function returns an aggregate type (struct, union, or class) | |
617 | by value, the caller must allocate space to hold the return value, | |
618 | and pass the callee a pointer to this space as an invisible first | |
619 | argument, in R0. | |
620 | ||
621 | For varargs functions, the last fixed argument and all the variable | |
622 | arguments are always passed on the stack. This means that calls to | |
623 | varargs functions don't work properly unless there is a prototype | |
624 | in scope. | |
625 | ||
626 | Basically, this ABI is not good, for the following reasons: | |
627 | - You can't call vararg functions properly unless a prototype is in scope. | |
628 | - Structure passing is inconsistent, to no purpose I can see. | |
629 | - It often wastes argument registers, of which there are only three | |
630 | to begin with. */ | |
631 | ||
632 | static CORE_ADDR | |
633 | h8300_push_dummy_call (struct gdbarch *gdbarch, struct value *function, | |
634 | struct regcache *regcache, CORE_ADDR bp_addr, | |
635 | int nargs, struct value **args, CORE_ADDR sp, | |
636 | int struct_return, CORE_ADDR struct_addr) | |
637 | { | |
638 | int stack_alloc = 0, stack_offset = 0; | |
be8626e0 | 639 | int wordsize = BINWORD (gdbarch); |
f0bdd87d YS |
640 | int reg = E_ARG0_REGNUM; |
641 | int argument; | |
642 | ||
643 | /* First, make sure the stack is properly aligned. */ | |
644 | sp = align_down (sp, wordsize); | |
645 | ||
646 | /* Now make sure there's space on the stack for the arguments. We | |
647 | may over-allocate a little here, but that won't hurt anything. */ | |
648 | for (argument = 0; argument < nargs; argument++) | |
649 | stack_alloc += align_up (TYPE_LENGTH (value_type (args[argument])), | |
650 | wordsize); | |
651 | sp -= stack_alloc; | |
652 | ||
653 | /* Now load as many arguments as possible into registers, and push | |
654 | the rest onto the stack. | |
655 | If we're returning a structure by value, then we must pass a | |
656 | pointer to the buffer for the return value as an invisible first | |
657 | argument. */ | |
658 | if (struct_return) | |
659 | regcache_cooked_write_unsigned (regcache, reg++, struct_addr); | |
660 | ||
661 | for (argument = 0; argument < nargs; argument++) | |
662 | { | |
663 | struct type *type = value_type (args[argument]); | |
664 | int len = TYPE_LENGTH (type); | |
665 | char *contents = (char *) value_contents (args[argument]); | |
666 | ||
667 | /* Pad the argument appropriately. */ | |
668 | int padded_len = align_up (len, wordsize); | |
5d0d05b6 | 669 | gdb_byte *padded = alloca (padded_len); |
f0bdd87d YS |
670 | |
671 | memset (padded, 0, padded_len); | |
672 | memcpy (len < wordsize ? padded + padded_len - len : padded, | |
673 | contents, len); | |
674 | ||
675 | /* Could the argument fit in the remaining registers? */ | |
676 | if (padded_len <= (E_ARGLAST_REGNUM - reg + 1) * wordsize) | |
677 | { | |
678 | /* Are we going to pass it on the stack anyway, for no good | |
679 | reason? */ | |
680 | if (len > wordsize && len % wordsize) | |
681 | { | |
682 | /* I feel so unclean. */ | |
683 | write_memory (sp + stack_offset, padded, padded_len); | |
684 | stack_offset += padded_len; | |
685 | ||
686 | /* That's right --- even though we passed the argument | |
687 | on the stack, we consume the registers anyway! Love | |
688 | me, love my dog. */ | |
689 | reg += padded_len / wordsize; | |
690 | } | |
691 | else | |
692 | { | |
693 | /* Heavens to Betsy --- it's really going in registers! | |
694 | It would be nice if we could use write_register_bytes | |
695 | here, but on the h8/300s, there are gaps between | |
696 | the registers in the register file. */ | |
697 | int offset; | |
698 | ||
699 | for (offset = 0; offset < padded_len; offset += wordsize) | |
700 | { | |
701 | ULONGEST word = extract_unsigned_integer (padded + offset, | |
702 | wordsize); | |
703 | regcache_cooked_write_unsigned (regcache, reg++, word); | |
704 | } | |
705 | } | |
706 | } | |
707 | else | |
708 | { | |
709 | /* It doesn't fit in registers! Onto the stack it goes. */ | |
710 | write_memory (sp + stack_offset, padded, padded_len); | |
711 | stack_offset += padded_len; | |
712 | ||
713 | /* Once one argument has spilled onto the stack, all | |
714 | subsequent arguments go on the stack. */ | |
715 | reg = E_ARGLAST_REGNUM + 1; | |
716 | } | |
717 | } | |
718 | ||
719 | /* Store return address. */ | |
720 | sp -= wordsize; | |
721 | write_memory_unsigned_integer (sp, wordsize, bp_addr); | |
722 | ||
723 | /* Update stack pointer. */ | |
724 | regcache_cooked_write_unsigned (regcache, E_SP_REGNUM, sp); | |
725 | ||
862ba188 CV |
726 | /* Return the new stack pointer minus the return address slot since |
727 | that's what DWARF2/GCC uses as the frame's CFA. */ | |
728 | return sp + wordsize; | |
f0bdd87d YS |
729 | } |
730 | ||
731 | /* Function: extract_return_value | |
732 | Figure out where in REGBUF the called function has left its return value. | |
733 | Copy that into VALBUF. Be sure to account for CPU type. */ | |
734 | ||
735 | static void | |
736 | h8300_extract_return_value (struct type *type, struct regcache *regcache, | |
737 | void *valbuf) | |
738 | { | |
739 | int len = TYPE_LENGTH (type); | |
740 | ULONGEST c, addr; | |
741 | ||
742 | switch (len) | |
743 | { | |
744 | case 1: | |
745 | case 2: | |
746 | regcache_cooked_read_unsigned (regcache, E_RET0_REGNUM, &c); | |
747 | store_unsigned_integer (valbuf, len, c); | |
748 | break; | |
749 | case 4: /* Needs two registers on plain H8/300 */ | |
750 | regcache_cooked_read_unsigned (regcache, E_RET0_REGNUM, &c); | |
751 | store_unsigned_integer (valbuf, 2, c); | |
752 | regcache_cooked_read_unsigned (regcache, E_RET1_REGNUM, &c); | |
753 | store_unsigned_integer ((void *) ((char *) valbuf + 2), 2, c); | |
754 | break; | |
755 | case 8: /* long long is now 8 bytes. */ | |
756 | if (TYPE_CODE (type) == TYPE_CODE_INT) | |
757 | { | |
758 | regcache_cooked_read_unsigned (regcache, E_RET0_REGNUM, &addr); | |
759 | c = read_memory_unsigned_integer ((CORE_ADDR) addr, len); | |
760 | store_unsigned_integer (valbuf, len, c); | |
761 | } | |
762 | else | |
763 | { | |
764 | error ("I don't know how this 8 byte value is returned."); | |
765 | } | |
766 | break; | |
767 | } | |
768 | } | |
769 | ||
770 | static void | |
771 | h8300h_extract_return_value (struct type *type, struct regcache *regcache, | |
772 | void *valbuf) | |
773 | { | |
774 | int len = TYPE_LENGTH (type); | |
775 | ULONGEST c, addr; | |
776 | ||
777 | switch (len) | |
778 | { | |
779 | case 1: | |
780 | case 2: | |
781 | case 4: | |
782 | regcache_cooked_read_unsigned (regcache, E_RET0_REGNUM, &c); | |
783 | store_unsigned_integer (valbuf, len, c); | |
784 | break; | |
785 | case 8: /* long long is now 8 bytes. */ | |
786 | if (TYPE_CODE (type) == TYPE_CODE_INT) | |
787 | { | |
862ba188 CV |
788 | regcache_cooked_read_unsigned (regcache, E_RET0_REGNUM, &c); |
789 | store_unsigned_integer (valbuf, 4, c); | |
790 | regcache_cooked_read_unsigned (regcache, E_RET1_REGNUM, &c); | |
791 | store_unsigned_integer ((void *) ((char *) valbuf + 4), 4, c); | |
f0bdd87d YS |
792 | } |
793 | else | |
794 | { | |
795 | error ("I don't know how this 8 byte value is returned."); | |
796 | } | |
797 | break; | |
798 | } | |
799 | } | |
800 | ||
63807e1d | 801 | static int |
862ba188 CV |
802 | h8300_use_struct_convention (struct type *value_type) |
803 | { | |
804 | /* Types of 1, 2 or 4 bytes are returned in R0/R1, everything else on the | |
805 | stack. */ | |
806 | ||
807 | if (TYPE_CODE (value_type) == TYPE_CODE_STRUCT | |
808 | || TYPE_CODE (value_type) == TYPE_CODE_UNION) | |
809 | return 1; | |
810 | return !(TYPE_LENGTH (value_type) == 1 | |
811 | || TYPE_LENGTH (value_type) == 2 | |
812 | || TYPE_LENGTH (value_type) == 4); | |
813 | } | |
814 | ||
63807e1d | 815 | static int |
862ba188 CV |
816 | h8300h_use_struct_convention (struct type *value_type) |
817 | { | |
818 | /* Types of 1, 2 or 4 bytes are returned in R0, INT types of 8 bytes are | |
819 | returned in R0/R1, everything else on the stack. */ | |
820 | if (TYPE_CODE (value_type) == TYPE_CODE_STRUCT | |
821 | || TYPE_CODE (value_type) == TYPE_CODE_UNION) | |
822 | return 1; | |
823 | return !(TYPE_LENGTH (value_type) == 1 | |
824 | || TYPE_LENGTH (value_type) == 2 | |
825 | || TYPE_LENGTH (value_type) == 4 | |
826 | || (TYPE_LENGTH (value_type) == 8 | |
827 | && TYPE_CODE (value_type) == TYPE_CODE_INT)); | |
828 | } | |
f0bdd87d YS |
829 | |
830 | /* Function: store_return_value | |
831 | Place the appropriate value in the appropriate registers. | |
832 | Primarily used by the RETURN command. */ | |
833 | ||
834 | static void | |
835 | h8300_store_return_value (struct type *type, struct regcache *regcache, | |
836 | const void *valbuf) | |
837 | { | |
838 | int len = TYPE_LENGTH (type); | |
839 | ULONGEST val; | |
840 | ||
841 | switch (len) | |
842 | { | |
843 | case 1: | |
844 | case 2: /* short... */ | |
845 | val = extract_unsigned_integer (valbuf, len); | |
846 | regcache_cooked_write_unsigned (regcache, E_RET0_REGNUM, val); | |
847 | break; | |
848 | case 4: /* long, float */ | |
849 | val = extract_unsigned_integer (valbuf, len); | |
850 | regcache_cooked_write_unsigned (regcache, E_RET0_REGNUM, | |
851 | (val >> 16) & 0xffff); | |
852 | regcache_cooked_write_unsigned (regcache, E_RET1_REGNUM, val & 0xffff); | |
853 | break; | |
854 | case 8: /* long long, double and long double are all defined | |
855 | as 4 byte types so far so this shouldn't happen. */ | |
856 | error ("I don't know how to return an 8 byte value."); | |
857 | break; | |
858 | } | |
859 | } | |
860 | ||
861 | static void | |
862 | h8300h_store_return_value (struct type *type, struct regcache *regcache, | |
863 | const void *valbuf) | |
864 | { | |
865 | int len = TYPE_LENGTH (type); | |
866 | ULONGEST val; | |
867 | ||
868 | switch (len) | |
869 | { | |
870 | case 1: | |
871 | case 2: | |
872 | case 4: /* long, float */ | |
873 | val = extract_unsigned_integer (valbuf, len); | |
874 | regcache_cooked_write_unsigned (regcache, E_RET0_REGNUM, val); | |
875 | break; | |
862ba188 CV |
876 | case 8: |
877 | val = extract_unsigned_integer (valbuf, len); | |
878 | regcache_cooked_write_unsigned (regcache, E_RET0_REGNUM, | |
879 | (val >> 32) & 0xffffffff); | |
880 | regcache_cooked_write_unsigned (regcache, E_RET1_REGNUM, | |
881 | val & 0xffffffff); | |
f0bdd87d YS |
882 | break; |
883 | } | |
884 | } | |
885 | ||
862ba188 | 886 | static enum return_value_convention |
c055b101 CV |
887 | h8300_return_value (struct gdbarch *gdbarch, struct type *func_type, |
888 | struct type *type, struct regcache *regcache, | |
5d0d05b6 | 889 | gdb_byte *readbuf, const gdb_byte *writebuf) |
862ba188 CV |
890 | { |
891 | if (h8300_use_struct_convention (type)) | |
892 | return RETURN_VALUE_STRUCT_CONVENTION; | |
893 | if (writebuf) | |
894 | h8300_store_return_value (type, regcache, writebuf); | |
895 | else if (readbuf) | |
896 | h8300_extract_return_value (type, regcache, readbuf); | |
897 | return RETURN_VALUE_REGISTER_CONVENTION; | |
898 | } | |
899 | ||
900 | static enum return_value_convention | |
c055b101 CV |
901 | h8300h_return_value (struct gdbarch *gdbarch, struct type *func_type, |
902 | struct type *type, struct regcache *regcache, | |
5d0d05b6 | 903 | gdb_byte *readbuf, const gdb_byte *writebuf) |
862ba188 CV |
904 | { |
905 | if (h8300h_use_struct_convention (type)) | |
906 | { | |
907 | if (readbuf) | |
908 | { | |
909 | ULONGEST addr; | |
910 | ||
911 | regcache_raw_read_unsigned (regcache, E_R0_REGNUM, &addr); | |
912 | read_memory (addr, readbuf, TYPE_LENGTH (type)); | |
913 | } | |
914 | ||
915 | return RETURN_VALUE_ABI_RETURNS_ADDRESS; | |
916 | } | |
917 | if (writebuf) | |
918 | h8300h_store_return_value (type, regcache, writebuf); | |
919 | else if (readbuf) | |
920 | h8300h_extract_return_value (type, regcache, readbuf); | |
921 | return RETURN_VALUE_REGISTER_CONVENTION; | |
922 | } | |
923 | ||
f0bdd87d YS |
924 | static struct cmd_list_element *setmachinelist; |
925 | ||
926 | static const char * | |
d93859e2 | 927 | h8300_register_name (struct gdbarch *gdbarch, int regno) |
f0bdd87d YS |
928 | { |
929 | /* The register names change depending on which h8300 processor | |
930 | type is selected. */ | |
931 | static char *register_names[] = { | |
932 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", | |
933 | "sp", "", "pc", "cycles", "tick", "inst", | |
934 | "ccr", /* pseudo register */ | |
935 | }; | |
936 | if (regno < 0 | |
937 | || regno >= (sizeof (register_names) / sizeof (*register_names))) | |
938 | internal_error (__FILE__, __LINE__, | |
939 | "h8300_register_name: illegal register number %d", regno); | |
940 | else | |
941 | return register_names[regno]; | |
942 | } | |
943 | ||
944 | static const char * | |
d93859e2 | 945 | h8300s_register_name (struct gdbarch *gdbarch, int regno) |
f0bdd87d YS |
946 | { |
947 | static char *register_names[] = { | |
948 | "er0", "er1", "er2", "er3", "er4", "er5", "er6", | |
949 | "sp", "", "pc", "cycles", "", "tick", "inst", | |
950 | "mach", "macl", | |
951 | "ccr", "exr" /* pseudo registers */ | |
952 | }; | |
953 | if (regno < 0 | |
954 | || regno >= (sizeof (register_names) / sizeof (*register_names))) | |
955 | internal_error (__FILE__, __LINE__, | |
956 | "h8300s_register_name: illegal register number %d", | |
957 | regno); | |
958 | else | |
959 | return register_names[regno]; | |
960 | } | |
961 | ||
962 | static const char * | |
d93859e2 | 963 | h8300sx_register_name (struct gdbarch *gdbarch, int regno) |
f0bdd87d YS |
964 | { |
965 | static char *register_names[] = { | |
966 | "er0", "er1", "er2", "er3", "er4", "er5", "er6", | |
967 | "sp", "", "pc", "cycles", "", "tick", "inst", | |
968 | "mach", "macl", "sbr", "vbr", | |
969 | "ccr", "exr" /* pseudo registers */ | |
970 | }; | |
971 | if (regno < 0 | |
972 | || regno >= (sizeof (register_names) / sizeof (*register_names))) | |
973 | internal_error (__FILE__, __LINE__, | |
974 | "h8300sx_register_name: illegal register number %d", | |
975 | regno); | |
976 | else | |
977 | return register_names[regno]; | |
978 | } | |
979 | ||
980 | static void | |
981 | h8300_print_register (struct gdbarch *gdbarch, struct ui_file *file, | |
982 | struct frame_info *frame, int regno) | |
983 | { | |
984 | LONGEST rval; | |
985 | const char *name = gdbarch_register_name (gdbarch, regno); | |
986 | ||
987 | if (!name || !*name) | |
988 | return; | |
989 | ||
990 | rval = get_frame_register_signed (frame, regno); | |
991 | ||
992 | fprintf_filtered (file, "%-14s ", name); | |
be8626e0 MD |
993 | if ((regno == E_PSEUDO_CCR_REGNUM (gdbarch)) || \ |
994 | (regno == E_PSEUDO_EXR_REGNUM (gdbarch) && is_h8300smode (gdbarch))) | |
f0bdd87d YS |
995 | { |
996 | fprintf_filtered (file, "0x%02x ", (unsigned char) rval); | |
997 | print_longest (file, 'u', 1, rval); | |
998 | } | |
999 | else | |
1000 | { | |
be8626e0 MD |
1001 | fprintf_filtered (file, "0x%s ", phex ((ULONGEST) rval, |
1002 | BINWORD (gdbarch))); | |
f0bdd87d YS |
1003 | print_longest (file, 'd', 1, rval); |
1004 | } | |
be8626e0 | 1005 | if (regno == E_PSEUDO_CCR_REGNUM (gdbarch)) |
f0bdd87d YS |
1006 | { |
1007 | /* CCR register */ | |
1008 | int C, Z, N, V; | |
1009 | unsigned char l = rval & 0xff; | |
1010 | fprintf_filtered (file, "\t"); | |
1011 | fprintf_filtered (file, "I-%d ", (l & 0x80) != 0); | |
1012 | fprintf_filtered (file, "UI-%d ", (l & 0x40) != 0); | |
1013 | fprintf_filtered (file, "H-%d ", (l & 0x20) != 0); | |
1014 | fprintf_filtered (file, "U-%d ", (l & 0x10) != 0); | |
1015 | N = (l & 0x8) != 0; | |
1016 | Z = (l & 0x4) != 0; | |
1017 | V = (l & 0x2) != 0; | |
1018 | C = (l & 0x1) != 0; | |
1019 | fprintf_filtered (file, "N-%d ", N); | |
1020 | fprintf_filtered (file, "Z-%d ", Z); | |
1021 | fprintf_filtered (file, "V-%d ", V); | |
1022 | fprintf_filtered (file, "C-%d ", C); | |
1023 | if ((C | Z) == 0) | |
1024 | fprintf_filtered (file, "u> "); | |
1025 | if ((C | Z) == 1) | |
1026 | fprintf_filtered (file, "u<= "); | |
1027 | if ((C == 0)) | |
1028 | fprintf_filtered (file, "u>= "); | |
1029 | if (C == 1) | |
1030 | fprintf_filtered (file, "u< "); | |
1031 | if (Z == 0) | |
1032 | fprintf_filtered (file, "!= "); | |
1033 | if (Z == 1) | |
1034 | fprintf_filtered (file, "== "); | |
1035 | if ((N ^ V) == 0) | |
1036 | fprintf_filtered (file, ">= "); | |
1037 | if ((N ^ V) == 1) | |
1038 | fprintf_filtered (file, "< "); | |
1039 | if ((Z | (N ^ V)) == 0) | |
1040 | fprintf_filtered (file, "> "); | |
1041 | if ((Z | (N ^ V)) == 1) | |
1042 | fprintf_filtered (file, "<= "); | |
1043 | } | |
be8626e0 | 1044 | else if (regno == E_PSEUDO_EXR_REGNUM (gdbarch) && is_h8300smode (gdbarch)) |
f0bdd87d YS |
1045 | { |
1046 | /* EXR register */ | |
1047 | unsigned char l = rval & 0xff; | |
1048 | fprintf_filtered (file, "\t"); | |
1049 | fprintf_filtered (file, "T-%d - - - ", (l & 0x80) != 0); | |
1050 | fprintf_filtered (file, "I2-%d ", (l & 4) != 0); | |
1051 | fprintf_filtered (file, "I1-%d ", (l & 2) != 0); | |
1052 | fprintf_filtered (file, "I0-%d", (l & 1) != 0); | |
1053 | } | |
1054 | fprintf_filtered (file, "\n"); | |
1055 | } | |
1056 | ||
1057 | static void | |
1058 | h8300_print_registers_info (struct gdbarch *gdbarch, struct ui_file *file, | |
1059 | struct frame_info *frame, int regno, int cpregs) | |
1060 | { | |
1061 | if (regno < 0) | |
1062 | { | |
1063 | for (regno = E_R0_REGNUM; regno <= E_SP_REGNUM; ++regno) | |
1064 | h8300_print_register (gdbarch, file, frame, regno); | |
be8626e0 MD |
1065 | h8300_print_register (gdbarch, file, frame, |
1066 | E_PSEUDO_CCR_REGNUM (gdbarch)); | |
f0bdd87d | 1067 | h8300_print_register (gdbarch, file, frame, E_PC_REGNUM); |
ea78bae4 | 1068 | if (is_h8300smode (gdbarch)) |
f0bdd87d | 1069 | { |
be8626e0 MD |
1070 | h8300_print_register (gdbarch, file, frame, |
1071 | E_PSEUDO_EXR_REGNUM (gdbarch)); | |
ea78bae4 | 1072 | if (is_h8300sxmode (gdbarch)) |
f0bdd87d YS |
1073 | { |
1074 | h8300_print_register (gdbarch, file, frame, E_SBR_REGNUM); | |
1075 | h8300_print_register (gdbarch, file, frame, E_VBR_REGNUM); | |
1076 | } | |
1077 | h8300_print_register (gdbarch, file, frame, E_MACH_REGNUM); | |
1078 | h8300_print_register (gdbarch, file, frame, E_MACL_REGNUM); | |
1079 | h8300_print_register (gdbarch, file, frame, E_CYCLES_REGNUM); | |
1080 | h8300_print_register (gdbarch, file, frame, E_TICKS_REGNUM); | |
1081 | h8300_print_register (gdbarch, file, frame, E_INSTS_REGNUM); | |
1082 | } | |
1083 | else | |
1084 | { | |
1085 | h8300_print_register (gdbarch, file, frame, E_CYCLES_REGNUM); | |
1086 | h8300_print_register (gdbarch, file, frame, E_TICK_REGNUM); | |
1087 | h8300_print_register (gdbarch, file, frame, E_INST_REGNUM); | |
1088 | } | |
1089 | } | |
1090 | else | |
1091 | { | |
1092 | if (regno == E_CCR_REGNUM) | |
be8626e0 MD |
1093 | h8300_print_register (gdbarch, file, frame, |
1094 | E_PSEUDO_CCR_REGNUM (gdbarch)); | |
1095 | else if (regno == E_PSEUDO_EXR_REGNUM (gdbarch) | |
ea78bae4 | 1096 | && is_h8300smode (gdbarch)) |
be8626e0 MD |
1097 | h8300_print_register (gdbarch, file, frame, |
1098 | E_PSEUDO_EXR_REGNUM (gdbarch)); | |
f0bdd87d YS |
1099 | else |
1100 | h8300_print_register (gdbarch, file, frame, regno); | |
1101 | } | |
1102 | } | |
1103 | ||
1104 | static struct type * | |
1105 | h8300_register_type (struct gdbarch *gdbarch, int regno) | |
1106 | { | |
ea78bae4 UW |
1107 | if (regno < 0 || regno >= gdbarch_num_regs (gdbarch) |
1108 | + gdbarch_num_pseudo_regs (gdbarch)) | |
f0bdd87d YS |
1109 | internal_error (__FILE__, __LINE__, |
1110 | "h8300_register_type: illegal register number %d", regno); | |
1111 | else | |
1112 | { | |
1113 | switch (regno) | |
1114 | { | |
1115 | case E_PC_REGNUM: | |
0dfff4cb | 1116 | return builtin_type (gdbarch)->builtin_func_ptr; |
f0bdd87d YS |
1117 | case E_SP_REGNUM: |
1118 | case E_FP_REGNUM: | |
0dfff4cb | 1119 | return builtin_type (gdbarch)->builtin_data_ptr; |
f0bdd87d | 1120 | default: |
be8626e0 | 1121 | if (regno == E_PSEUDO_CCR_REGNUM (gdbarch)) |
f0bdd87d | 1122 | return builtin_type_uint8; |
be8626e0 | 1123 | else if (regno == E_PSEUDO_EXR_REGNUM (gdbarch)) |
f0bdd87d | 1124 | return builtin_type_uint8; |
ea78bae4 | 1125 | else if (is_h8300hmode (gdbarch)) |
f0bdd87d YS |
1126 | return builtin_type_int32; |
1127 | else | |
1128 | return builtin_type_int16; | |
1129 | } | |
1130 | } | |
1131 | } | |
1132 | ||
1133 | static void | |
1134 | h8300_pseudo_register_read (struct gdbarch *gdbarch, | |
5d0d05b6 CV |
1135 | struct regcache *regcache, int regno, |
1136 | gdb_byte *buf) | |
f0bdd87d | 1137 | { |
be8626e0 | 1138 | if (regno == E_PSEUDO_CCR_REGNUM (gdbarch)) |
f0bdd87d | 1139 | regcache_raw_read (regcache, E_CCR_REGNUM, buf); |
be8626e0 | 1140 | else if (regno == E_PSEUDO_EXR_REGNUM (gdbarch)) |
f0bdd87d YS |
1141 | regcache_raw_read (regcache, E_EXR_REGNUM, buf); |
1142 | else | |
1143 | regcache_raw_read (regcache, regno, buf); | |
1144 | } | |
1145 | ||
1146 | static void | |
1147 | h8300_pseudo_register_write (struct gdbarch *gdbarch, | |
1148 | struct regcache *regcache, int regno, | |
5d0d05b6 | 1149 | const gdb_byte *buf) |
f0bdd87d | 1150 | { |
be8626e0 | 1151 | if (regno == E_PSEUDO_CCR_REGNUM (gdbarch)) |
f0bdd87d | 1152 | regcache_raw_write (regcache, E_CCR_REGNUM, buf); |
be8626e0 | 1153 | else if (regno == E_PSEUDO_EXR_REGNUM (gdbarch)) |
f0bdd87d YS |
1154 | regcache_raw_write (regcache, E_EXR_REGNUM, buf); |
1155 | else | |
1156 | regcache_raw_write (regcache, regno, buf); | |
1157 | } | |
1158 | ||
1159 | static int | |
d3f73121 | 1160 | h8300_dbg_reg_to_regnum (struct gdbarch *gdbarch, int regno) |
f0bdd87d YS |
1161 | { |
1162 | if (regno == E_CCR_REGNUM) | |
be8626e0 | 1163 | return E_PSEUDO_CCR_REGNUM (gdbarch); |
f0bdd87d YS |
1164 | return regno; |
1165 | } | |
1166 | ||
1167 | static int | |
d3f73121 | 1168 | h8300s_dbg_reg_to_regnum (struct gdbarch *gdbarch, int regno) |
f0bdd87d YS |
1169 | { |
1170 | if (regno == E_CCR_REGNUM) | |
be8626e0 | 1171 | return E_PSEUDO_CCR_REGNUM (gdbarch); |
f0bdd87d | 1172 | if (regno == E_EXR_REGNUM) |
be8626e0 | 1173 | return E_PSEUDO_EXR_REGNUM (gdbarch); |
f0bdd87d YS |
1174 | return regno; |
1175 | } | |
1176 | ||
f0bdd87d | 1177 | const static unsigned char * |
67d57894 MD |
1178 | h8300_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr, |
1179 | int *lenptr) | |
f0bdd87d YS |
1180 | { |
1181 | /*static unsigned char breakpoint[] = { 0x7A, 0xFF }; *//* ??? */ | |
1182 | static unsigned char breakpoint[] = { 0x01, 0x80 }; /* Sleep */ | |
1183 | ||
1184 | *lenptr = sizeof (breakpoint); | |
1185 | return breakpoint; | |
1186 | } | |
1187 | ||
f0bdd87d YS |
1188 | static void |
1189 | h8300_print_float_info (struct gdbarch *gdbarch, struct ui_file *file, | |
1190 | struct frame_info *frame, const char *args) | |
1191 | { | |
1192 | fprintf_filtered (file, "\ | |
1193 | No floating-point info available for this processor.\n"); | |
1194 | } | |
1195 | ||
1196 | static struct gdbarch * | |
1197 | h8300_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) | |
1198 | { | |
1199 | struct gdbarch_tdep *tdep = NULL; | |
1200 | struct gdbarch *gdbarch; | |
1201 | ||
1202 | arches = gdbarch_list_lookup_by_info (arches, &info); | |
1203 | if (arches != NULL) | |
1204 | return arches->gdbarch; | |
1205 | ||
1206 | #if 0 | |
1207 | tdep = (struct gdbarch_tdep *) xmalloc (sizeof (struct gdbarch_tdep)); | |
1208 | #endif | |
1209 | ||
1210 | if (info.bfd_arch_info->arch != bfd_arch_h8300) | |
1211 | return NULL; | |
1212 | ||
1213 | gdbarch = gdbarch_alloc (&info, 0); | |
1214 | ||
1215 | switch (info.bfd_arch_info->mach) | |
1216 | { | |
1217 | case bfd_mach_h8300: | |
1218 | set_gdbarch_num_regs (gdbarch, 13); | |
1219 | set_gdbarch_num_pseudo_regs (gdbarch, 1); | |
1220 | set_gdbarch_ecoff_reg_to_regnum (gdbarch, h8300_dbg_reg_to_regnum); | |
f0bdd87d YS |
1221 | set_gdbarch_dwarf2_reg_to_regnum (gdbarch, h8300_dbg_reg_to_regnum); |
1222 | set_gdbarch_stab_reg_to_regnum (gdbarch, h8300_dbg_reg_to_regnum); | |
1223 | set_gdbarch_register_name (gdbarch, h8300_register_name); | |
1224 | set_gdbarch_ptr_bit (gdbarch, 2 * TARGET_CHAR_BIT); | |
1225 | set_gdbarch_addr_bit (gdbarch, 2 * TARGET_CHAR_BIT); | |
862ba188 | 1226 | set_gdbarch_return_value (gdbarch, h8300_return_value); |
f0bdd87d YS |
1227 | set_gdbarch_print_insn (gdbarch, print_insn_h8300); |
1228 | break; | |
1229 | case bfd_mach_h8300h: | |
1230 | case bfd_mach_h8300hn: | |
1231 | set_gdbarch_num_regs (gdbarch, 13); | |
1232 | set_gdbarch_num_pseudo_regs (gdbarch, 1); | |
1233 | set_gdbarch_ecoff_reg_to_regnum (gdbarch, h8300_dbg_reg_to_regnum); | |
f0bdd87d YS |
1234 | set_gdbarch_dwarf2_reg_to_regnum (gdbarch, h8300_dbg_reg_to_regnum); |
1235 | set_gdbarch_stab_reg_to_regnum (gdbarch, h8300_dbg_reg_to_regnum); | |
1236 | set_gdbarch_register_name (gdbarch, h8300_register_name); | |
1237 | if (info.bfd_arch_info->mach != bfd_mach_h8300hn) | |
1238 | { | |
1239 | set_gdbarch_ptr_bit (gdbarch, 4 * TARGET_CHAR_BIT); | |
1240 | set_gdbarch_addr_bit (gdbarch, 4 * TARGET_CHAR_BIT); | |
1241 | } | |
1242 | else | |
1243 | { | |
1244 | set_gdbarch_ptr_bit (gdbarch, 2 * TARGET_CHAR_BIT); | |
1245 | set_gdbarch_addr_bit (gdbarch, 2 * TARGET_CHAR_BIT); | |
1246 | } | |
862ba188 | 1247 | set_gdbarch_return_value (gdbarch, h8300h_return_value); |
f0bdd87d YS |
1248 | set_gdbarch_print_insn (gdbarch, print_insn_h8300h); |
1249 | break; | |
1250 | case bfd_mach_h8300s: | |
1251 | case bfd_mach_h8300sn: | |
1252 | set_gdbarch_num_regs (gdbarch, 16); | |
1253 | set_gdbarch_num_pseudo_regs (gdbarch, 2); | |
1254 | set_gdbarch_ecoff_reg_to_regnum (gdbarch, h8300s_dbg_reg_to_regnum); | |
f0bdd87d YS |
1255 | set_gdbarch_dwarf2_reg_to_regnum (gdbarch, h8300s_dbg_reg_to_regnum); |
1256 | set_gdbarch_stab_reg_to_regnum (gdbarch, h8300s_dbg_reg_to_regnum); | |
1257 | set_gdbarch_register_name (gdbarch, h8300s_register_name); | |
1258 | if (info.bfd_arch_info->mach != bfd_mach_h8300sn) | |
1259 | { | |
1260 | set_gdbarch_ptr_bit (gdbarch, 4 * TARGET_CHAR_BIT); | |
1261 | set_gdbarch_addr_bit (gdbarch, 4 * TARGET_CHAR_BIT); | |
1262 | } | |
1263 | else | |
1264 | { | |
1265 | set_gdbarch_ptr_bit (gdbarch, 2 * TARGET_CHAR_BIT); | |
1266 | set_gdbarch_addr_bit (gdbarch, 2 * TARGET_CHAR_BIT); | |
1267 | } | |
862ba188 | 1268 | set_gdbarch_return_value (gdbarch, h8300h_return_value); |
f0bdd87d YS |
1269 | set_gdbarch_print_insn (gdbarch, print_insn_h8300s); |
1270 | break; | |
1271 | case bfd_mach_h8300sx: | |
1272 | case bfd_mach_h8300sxn: | |
1273 | set_gdbarch_num_regs (gdbarch, 18); | |
1274 | set_gdbarch_num_pseudo_regs (gdbarch, 2); | |
1275 | set_gdbarch_ecoff_reg_to_regnum (gdbarch, h8300s_dbg_reg_to_regnum); | |
f0bdd87d YS |
1276 | set_gdbarch_dwarf2_reg_to_regnum (gdbarch, h8300s_dbg_reg_to_regnum); |
1277 | set_gdbarch_stab_reg_to_regnum (gdbarch, h8300s_dbg_reg_to_regnum); | |
1278 | set_gdbarch_register_name (gdbarch, h8300sx_register_name); | |
1279 | if (info.bfd_arch_info->mach != bfd_mach_h8300sxn) | |
1280 | { | |
1281 | set_gdbarch_ptr_bit (gdbarch, 4 * TARGET_CHAR_BIT); | |
1282 | set_gdbarch_addr_bit (gdbarch, 4 * TARGET_CHAR_BIT); | |
1283 | } | |
1284 | else | |
1285 | { | |
1286 | set_gdbarch_ptr_bit (gdbarch, 2 * TARGET_CHAR_BIT); | |
1287 | set_gdbarch_addr_bit (gdbarch, 2 * TARGET_CHAR_BIT); | |
1288 | } | |
862ba188 | 1289 | set_gdbarch_return_value (gdbarch, h8300h_return_value); |
f0bdd87d YS |
1290 | set_gdbarch_print_insn (gdbarch, print_insn_h8300s); |
1291 | break; | |
1292 | } | |
1293 | ||
1294 | set_gdbarch_pseudo_register_read (gdbarch, h8300_pseudo_register_read); | |
1295 | set_gdbarch_pseudo_register_write (gdbarch, h8300_pseudo_register_write); | |
1296 | ||
1297 | /* | |
1298 | * Basic register fields and methods. | |
1299 | */ | |
1300 | ||
1301 | set_gdbarch_sp_regnum (gdbarch, E_SP_REGNUM); | |
f0bdd87d YS |
1302 | set_gdbarch_pc_regnum (gdbarch, E_PC_REGNUM); |
1303 | set_gdbarch_register_type (gdbarch, h8300_register_type); | |
1304 | set_gdbarch_print_registers_info (gdbarch, h8300_print_registers_info); | |
1305 | set_gdbarch_print_float_info (gdbarch, h8300_print_float_info); | |
1306 | ||
1307 | /* | |
1308 | * Frame Info | |
1309 | */ | |
1310 | set_gdbarch_skip_prologue (gdbarch, h8300_skip_prologue); | |
1311 | ||
1312 | /* Frame unwinder. */ | |
f0bdd87d | 1313 | set_gdbarch_unwind_pc (gdbarch, h8300_unwind_pc); |
862ba188 | 1314 | set_gdbarch_unwind_sp (gdbarch, h8300_unwind_sp); |
94afd7a6 | 1315 | set_gdbarch_dummy_id (gdbarch, h8300_dummy_id); |
862ba188 | 1316 | frame_base_set_default (gdbarch, &h8300_frame_base); |
f0bdd87d YS |
1317 | |
1318 | /* | |
1319 | * Miscelany | |
1320 | */ | |
1321 | /* Stack grows up. */ | |
1322 | set_gdbarch_inner_than (gdbarch, core_addr_lessthan); | |
1323 | ||
f0bdd87d | 1324 | set_gdbarch_breakpoint_from_pc (gdbarch, h8300_breakpoint_from_pc); |
f0bdd87d YS |
1325 | set_gdbarch_push_dummy_call (gdbarch, h8300_push_dummy_call); |
1326 | ||
862ba188 | 1327 | set_gdbarch_char_signed (gdbarch, 0); |
f0bdd87d YS |
1328 | set_gdbarch_int_bit (gdbarch, 2 * TARGET_CHAR_BIT); |
1329 | set_gdbarch_long_bit (gdbarch, 4 * TARGET_CHAR_BIT); | |
1330 | set_gdbarch_long_long_bit (gdbarch, 8 * TARGET_CHAR_BIT); | |
1331 | set_gdbarch_double_bit (gdbarch, 4 * TARGET_CHAR_BIT); | |
1332 | set_gdbarch_long_double_bit (gdbarch, 4 * TARGET_CHAR_BIT); | |
1333 | ||
1334 | set_gdbarch_believe_pcc_promotion (gdbarch, 1); | |
1335 | ||
862ba188 | 1336 | /* Hook in the DWARF CFI frame unwinder. */ |
94afd7a6 UW |
1337 | dwarf2_append_unwinders (gdbarch); |
1338 | frame_unwind_append_unwinder (gdbarch, &h8300_frame_unwind); | |
f0bdd87d YS |
1339 | |
1340 | return gdbarch; | |
1341 | ||
1342 | } | |
1343 | ||
1344 | extern initialize_file_ftype _initialize_h8300_tdep; /* -Wmissing-prototypes */ | |
1345 | ||
1346 | void | |
1347 | _initialize_h8300_tdep (void) | |
1348 | { | |
1349 | register_gdbarch_init (bfd_arch_h8300, h8300_gdbarch_init); | |
1350 | } | |
1351 | ||
1352 | static int | |
1353 | is_h8300hmode (struct gdbarch *gdbarch) | |
1354 | { | |
1355 | return gdbarch_bfd_arch_info (gdbarch)->mach == bfd_mach_h8300sx | |
1356 | || gdbarch_bfd_arch_info (gdbarch)->mach == bfd_mach_h8300sxn | |
1357 | || gdbarch_bfd_arch_info (gdbarch)->mach == bfd_mach_h8300s | |
1358 | || gdbarch_bfd_arch_info (gdbarch)->mach == bfd_mach_h8300sn | |
1359 | || gdbarch_bfd_arch_info (gdbarch)->mach == bfd_mach_h8300h | |
1360 | || gdbarch_bfd_arch_info (gdbarch)->mach == bfd_mach_h8300hn; | |
1361 | } | |
1362 | ||
1363 | static int | |
1364 | is_h8300smode (struct gdbarch *gdbarch) | |
1365 | { | |
1366 | return gdbarch_bfd_arch_info (gdbarch)->mach == bfd_mach_h8300sx | |
1367 | || gdbarch_bfd_arch_info (gdbarch)->mach == bfd_mach_h8300sxn | |
1368 | || gdbarch_bfd_arch_info (gdbarch)->mach == bfd_mach_h8300s | |
1369 | || gdbarch_bfd_arch_info (gdbarch)->mach == bfd_mach_h8300sn; | |
1370 | } | |
1371 | ||
1372 | static int | |
1373 | is_h8300sxmode (struct gdbarch *gdbarch) | |
1374 | { | |
1375 | return gdbarch_bfd_arch_info (gdbarch)->mach == bfd_mach_h8300sx | |
1376 | || gdbarch_bfd_arch_info (gdbarch)->mach == bfd_mach_h8300sxn; | |
1377 | } | |
1378 | ||
1379 | static int | |
1380 | is_h8300_normal_mode (struct gdbarch *gdbarch) | |
1381 | { | |
1382 | return gdbarch_bfd_arch_info (gdbarch)->mach == bfd_mach_h8300sxn | |
1383 | || gdbarch_bfd_arch_info (gdbarch)->mach == bfd_mach_h8300sn | |
1384 | || gdbarch_bfd_arch_info (gdbarch)->mach == bfd_mach_h8300hn; | |
1385 | } |