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195e46ea SC |
1 | /* Target-machine dependent code for Hitachi H8/500, for GDB. |
2 | Copyright (C) 1993 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | /* | |
21 | Contributed by Steve Chamberlain | |
22 | sac@cygnus.com | |
23 | */ | |
24 | ||
25 | #include "defs.h" | |
26 | #include "frame.h" | |
27 | #include "obstack.h" | |
28 | #include "symtab.h" | |
29 | #include "gdbtypes.h" | |
30 | #include "gdbcmd.h" | |
ccf1e898 | 31 | #include "value.h" |
195e46ea SC |
32 | #include "dis-asm.h" |
33 | #include "../opcodes/h8500-opc.h" | |
34 | ; | |
195e46ea SC |
35 | |
36 | #define UNSIGNED_SHORT(X) ((X) & 0xffff) | |
edd01519 SC |
37 | int code_size = 2; |
38 | int data_size = 2; | |
195e46ea | 39 | |
85e07872 | 40 | /* Shape of an H8/500 frame : |
195e46ea SC |
41 | |
42 | ||
43 | arg-n | |
44 | .. | |
45 | arg-2 | |
46 | arg-1 | |
47 | return address <2 or 4 bytes> | |
48 | old fp <2 bytes> | |
49 | auto-n | |
50 | .. | |
51 | auto-1 | |
52 | saved registers | |
53 | ||
54 | */ | |
55 | ||
56 | ||
57 | /* an easy to debug H8 stack frame looks like: | |
58 | 0x6df6 push r6 | |
59 | 0x0d76 mov.w r7,r6 | |
60 | 0x6dfn push reg | |
61 | 0x7905 nnnn mov.w #n,r5 or 0x1b87 subs #2,sp | |
62 | 0x1957 sub.w r5,sp | |
63 | ||
64 | */ | |
65 | ||
d1445327 | 66 | #define IS_PUSH(x) (((x) & 0xff00)==0x6d00) |
195e46ea SC |
67 | #define IS_LINK_8(x) ((x) == 0x17) |
68 | #define IS_LINK_16(x) ((x) == 0x1f) | |
d1445327 FF |
69 | #define IS_MOVE_FP(x) ((x) == 0x0d76) |
70 | #define IS_MOV_SP_FP(x) ((x) == 0x0d76) | |
71 | #define IS_SUB2_SP(x) ((x) == 0x1b87) | |
72 | #define IS_MOVK_R5(x) ((x) == 0x7905) | |
73 | #define IS_SUB_R5SP(x) ((x) == 0x1957) | |
195e46ea SC |
74 | |
75 | #define LINK_8 0x17 | |
76 | #define LINK_16 0x1f | |
77 | ||
78 | int minimum_mode = 1; | |
79 | CORE_ADDR examine_prologue (); | |
80 | ||
81 | void frame_find_saved_regs (); | |
ccf1e898 | 82 | |
ccf1e898 | 83 | |
195e46ea SC |
84 | CORE_ADDR |
85 | h8500_skip_prologue (start_pc) | |
86 | CORE_ADDR start_pc; | |
87 | ||
88 | { | |
89 | short int w; | |
90 | ||
08c0d7b8 | 91 | w = read_memory_integer (start_pc, 1); |
195e46ea SC |
92 | if (w == LINK_8) |
93 | { | |
ccf1e898 | 94 | start_pc += 2; |
85e07872 | 95 | w = read_memory_integer (start_pc, 1); |
195e46ea SC |
96 | } |
97 | ||
98 | if (w == LINK_16) | |
99 | { | |
ccf1e898 | 100 | start_pc += 3; |
85e07872 | 101 | w = read_memory_integer (start_pc, 2); |
195e46ea SC |
102 | } |
103 | ||
195e46ea | 104 | return start_pc; |
195e46ea SC |
105 | } |
106 | ||
107 | int | |
108 | print_insn (memaddr, stream) | |
109 | CORE_ADDR memaddr; | |
199b2450 | 110 | GDB_FILE *stream; |
195e46ea | 111 | { |
195e46ea | 112 | disassemble_info info; |
85e07872 | 113 | GDB_INIT_DISASSEMBLE_INFO (info, stream); |
5d0734a7 | 114 | return print_insn_h8500 (memaddr, &info); |
195e46ea SC |
115 | } |
116 | ||
117 | /* Given a GDB frame, determine the address of the calling function's frame. | |
118 | This will be used to create a new GDB frame struct, and then | |
119 | INIT_EXTRA_FRAME_INFO and INIT_FRAME_PC will be called for the new frame. | |
120 | ||
121 | For us, the frame address is its stack pointer value, so we look up | |
122 | the function prologue to determine the caller's sp value, and return it. */ | |
123 | ||
124 | FRAME_ADDR | |
ccf1e898 | 125 | h8500_frame_chain (thisframe) |
195e46ea SC |
126 | FRAME thisframe; |
127 | { | |
ccf1e898 | 128 | if (!inside_entry_file (thisframe->pc)) |
08c0d7b8 | 129 | return (read_memory_integer (FRAME_FP (thisframe), PTR_SIZE)); |
ccf1e898 SG |
130 | else |
131 | return 0; | |
195e46ea SC |
132 | } |
133 | ||
195e46ea SC |
134 | |
135 | /* Fetch the instruction at ADDR, returning 0 if ADDR is beyond LIM or | |
136 | is not the address of a valid instruction, the address of the next | |
137 | instruction beyond ADDR otherwise. *PWORD1 receives the first word | |
138 | of the instruction.*/ | |
139 | ||
140 | CORE_ADDR | |
141 | NEXT_PROLOGUE_INSN (addr, lim, pword1) | |
142 | CORE_ADDR addr; | |
143 | CORE_ADDR lim; | |
144 | char *pword1; | |
145 | { | |
146 | if (addr < lim + 8) | |
147 | { | |
148 | read_memory (addr, pword1, 1); | |
149 | read_memory (addr, pword1 + 1, 1); | |
150 | return 1; | |
151 | } | |
152 | return 0; | |
153 | } | |
154 | ||
155 | /* Examine the prologue of a function. `ip' points to the first instruction. | |
156 | `limit' is the limit of the prologue (e.g. the addr of the first | |
157 | linenumber, or perhaps the program counter if we're stepping through). | |
158 | `frame_sp' is the stack pointer value in use in this frame. | |
159 | `fsr' is a pointer to a frame_saved_regs structure into which we put | |
160 | info about the registers saved by this frame. | |
161 | `fi' is a struct frame_info pointer; we fill in various fields in it | |
162 | to reflect the offsets of the arg pointer and the locals pointer. */ | |
d1445327 | 163 | |
195e46ea SC |
164 | |
165 | /* Return the saved PC from this frame. */ | |
166 | ||
167 | CORE_ADDR | |
168 | frame_saved_pc (frame) | |
169 | FRAME frame; | |
170 | { | |
ccf1e898 | 171 | return read_memory_integer ((frame)->frame + 2, PTR_SIZE); |
195e46ea SC |
172 | } |
173 | ||
174 | CORE_ADDR | |
175 | frame_locals_address (fi) | |
176 | struct frame_info *fi; | |
177 | { | |
178 | return fi->frame; | |
179 | } | |
180 | ||
181 | /* Return the address of the argument block for the frame | |
182 | described by FI. Returns 0 if the address is unknown. */ | |
183 | ||
184 | CORE_ADDR | |
185 | frame_args_address (fi) | |
186 | struct frame_info *fi; | |
187 | { | |
ccf1e898 | 188 | return fi->frame; |
195e46ea SC |
189 | } |
190 | ||
191 | void | |
192 | h8300_pop_frame () | |
193 | { | |
194 | unsigned regnum; | |
195 | struct frame_saved_regs fsr; | |
196 | struct frame_info *fi; | |
197 | ||
198 | FRAME frame = get_current_frame (); | |
199 | ||
200 | fi = get_frame_info (frame); | |
201 | get_frame_saved_regs (fi, &fsr); | |
202 | ||
203 | for (regnum = 0; regnum < 8; regnum++) | |
204 | { | |
205 | if (fsr.regs[regnum]) | |
206 | { | |
207 | write_register (regnum, read_memory_short (fsr.regs[regnum])); | |
208 | } | |
209 | ||
210 | flush_cached_frames (); | |
195e46ea SC |
211 | } |
212 | ||
213 | } | |
214 | ||
215 | void | |
216 | print_register_hook (regno) | |
217 | { | |
218 | if (regno == CCR_REGNUM) | |
219 | { | |
220 | /* CCR register */ | |
221 | ||
222 | int C, Z, N, V; | |
223 | unsigned char b[2]; | |
224 | unsigned char l; | |
225 | ||
226 | read_relative_register_raw_bytes (regno, b); | |
227 | l = b[1]; | |
199b2450 TL |
228 | printf_unfiltered ("\t"); |
229 | printf_unfiltered ("I-%d - ", (l & 0x80) != 0); | |
195e46ea SC |
230 | N = (l & 0x8) != 0; |
231 | Z = (l & 0x4) != 0; | |
232 | V = (l & 0x2) != 0; | |
233 | C = (l & 0x1) != 0; | |
199b2450 TL |
234 | printf_unfiltered ("N-%d ", N); |
235 | printf_unfiltered ("Z-%d ", Z); | |
236 | printf_unfiltered ("V-%d ", V); | |
237 | printf_unfiltered ("C-%d ", C); | |
195e46ea | 238 | if ((C | Z) == 0) |
199b2450 | 239 | printf_unfiltered ("u> "); |
195e46ea | 240 | if ((C | Z) == 1) |
199b2450 | 241 | printf_unfiltered ("u<= "); |
195e46ea | 242 | if ((C == 0)) |
199b2450 | 243 | printf_unfiltered ("u>= "); |
195e46ea | 244 | if (C == 1) |
199b2450 | 245 | printf_unfiltered ("u< "); |
195e46ea | 246 | if (Z == 0) |
199b2450 | 247 | printf_unfiltered ("!= "); |
195e46ea | 248 | if (Z == 1) |
199b2450 | 249 | printf_unfiltered ("== "); |
195e46ea | 250 | if ((N ^ V) == 0) |
199b2450 | 251 | printf_unfiltered (">= "); |
195e46ea | 252 | if ((N ^ V) == 1) |
199b2450 | 253 | printf_unfiltered ("< "); |
195e46ea | 254 | if ((Z | (N ^ V)) == 0) |
199b2450 | 255 | printf_unfiltered ("> "); |
195e46ea | 256 | if ((Z | (N ^ V)) == 1) |
199b2450 | 257 | printf_unfiltered ("<= "); |
195e46ea SC |
258 | } |
259 | } | |
260 | ||
ccf1e898 SG |
261 | int |
262 | h8500_register_size (regno) | |
263 | int regno; | |
195e46ea | 264 | { |
08c0d7b8 SC |
265 | switch (regno) { |
266 | case SEG_C_REGNUM: | |
267 | case SEG_D_REGNUM: | |
268 | case SEG_E_REGNUM: | |
269 | case SEG_T_REGNUM: | |
ccf1e898 | 270 | return 1; |
08c0d7b8 SC |
271 | case R0_REGNUM: |
272 | case R1_REGNUM: | |
273 | case R2_REGNUM: | |
274 | case R3_REGNUM: | |
275 | case R4_REGNUM: | |
276 | case R5_REGNUM: | |
277 | case R6_REGNUM: | |
278 | case R7_REGNUM: | |
279 | case CCR_REGNUM: | |
280 | return 2; | |
281 | ||
282 | case PR0_REGNUM: | |
283 | case PR1_REGNUM: | |
284 | case PR2_REGNUM: | |
285 | case PR3_REGNUM: | |
286 | case PR4_REGNUM: | |
287 | case PR5_REGNUM: | |
288 | case PR6_REGNUM: | |
289 | case PR7_REGNUM: | |
290 | case PC_REGNUM: | |
291 | return 4; | |
292 | } | |
195e46ea SC |
293 | } |
294 | ||
295 | struct type * | |
ccf1e898 SG |
296 | h8500_register_virtual_type (regno) |
297 | int regno; | |
195e46ea | 298 | { |
ccf1e898 | 299 | switch (regno) |
195e46ea | 300 | { |
ccf1e898 SG |
301 | case SEG_C_REGNUM: |
302 | case SEG_E_REGNUM: | |
303 | case SEG_D_REGNUM: | |
304 | case SEG_T_REGNUM: | |
195e46ea | 305 | return builtin_type_unsigned_char; |
ccf1e898 SG |
306 | case R0_REGNUM: |
307 | case R1_REGNUM: | |
308 | case R2_REGNUM: | |
309 | case R3_REGNUM: | |
310 | case R4_REGNUM: | |
311 | case R5_REGNUM: | |
312 | case R6_REGNUM: | |
313 | case R7_REGNUM: | |
195e46ea SC |
314 | case CCR_REGNUM: |
315 | return builtin_type_unsigned_short; | |
08c0d7b8 SC |
316 | case PR0_REGNUM: |
317 | case PR1_REGNUM: | |
318 | case PR2_REGNUM: | |
319 | case PR3_REGNUM: | |
320 | case PR4_REGNUM: | |
321 | case PR5_REGNUM: | |
322 | case PR6_REGNUM: | |
323 | case PR7_REGNUM: | |
324 | case PC_REGNUM: | |
325 | return builtin_type_unsigned_long; | |
195e46ea | 326 | default: |
85e07872 | 327 | abort (); |
195e46ea SC |
328 | } |
329 | } | |
330 | ||
195e46ea SC |
331 | /* Put here the code to store, into a struct frame_saved_regs, |
332 | the addresses of the saved registers of frame described by FRAME_INFO. | |
333 | This includes special registers such as pc and fp saved in special | |
334 | ways in the stack frame. sp is even more special: | |
335 | the address we return for it IS the sp for the next frame. */ | |
336 | ||
337 | void | |
338 | frame_find_saved_regs (frame_info, frame_saved_regs) | |
339 | struct frame_info *frame_info; | |
340 | struct frame_saved_regs *frame_saved_regs; | |
341 | ||
342 | { | |
343 | register int regnum; | |
344 | register int regmask; | |
345 | register CORE_ADDR next_addr; | |
346 | register CORE_ADDR pc; | |
347 | unsigned char thebyte; | |
348 | ||
4ed97c9a | 349 | memset (frame_saved_regs, '\0', sizeof *frame_saved_regs); |
195e46ea SC |
350 | |
351 | if ((frame_info)->pc >= (frame_info)->frame - CALL_DUMMY_LENGTH - FP_REGNUM * 4 - 4 | |
352 | && (frame_info)->pc <= (frame_info)->frame) | |
353 | { | |
354 | next_addr = (frame_info)->frame; | |
355 | pc = (frame_info)->frame - CALL_DUMMY_LENGTH - FP_REGNUM * 4 - 4; | |
356 | } | |
357 | else | |
358 | { | |
359 | pc = get_pc_function_start ((frame_info)->pc); | |
360 | /* Verify we have a link a6 instruction next; | |
361 | if not we lose. If we win, find the address above the saved | |
362 | regs using the amount of storage from the link instruction. | |
363 | */ | |
364 | ||
85e07872 | 365 | thebyte = read_memory_integer (pc, 1); |
195e46ea SC |
366 | if (0x1f == thebyte) |
367 | next_addr = (frame_info)->frame + read_memory_integer (pc += 1, 2), pc += 2; | |
368 | else if (0x17 == thebyte) | |
369 | next_addr = (frame_info)->frame + read_memory_integer (pc += 1, 1), pc += 1; | |
370 | else | |
371 | goto lose; | |
372 | #if 0 | |
d1445327 | 373 | /* FIXME steve */ |
85e07872 SC |
374 | /* If have an add:g.waddal #-n, sp next, adjust next_addr. */ |
375 | if ((0x0c0177777 & read_memory_integer (pc, 2)) == 0157774) | |
376 | next_addr += read_memory_integer (pc += 2, 4), pc += 4; | |
195e46ea SC |
377 | #endif |
378 | } | |
379 | ||
85e07872 SC |
380 | thebyte = read_memory_integer (pc, 1); |
381 | if (thebyte == 0x12) | |
382 | { | |
383 | /* Got stm */ | |
384 | pc++; | |
385 | regmask = read_memory_integer (pc, 1); | |
386 | pc++; | |
387 | for (regnum = 0; regnum < 8; regnum++, regmask >>= 1) | |
388 | { | |
389 | if (regmask & 1) | |
390 | { | |
391 | (frame_saved_regs)->regs[regnum] = (next_addr += 2) - 2; | |
392 | } | |
393 | } | |
394 | thebyte = read_memory_integer (pc, 1); | |
395 | } | |
195e46ea | 396 | /* Maybe got a load of pushes */ |
85e07872 SC |
397 | while (thebyte == 0xbf) |
398 | { | |
399 | pc++; | |
400 | regnum = read_memory_integer (pc, 1) & 0x7; | |
401 | pc++; | |
402 | (frame_saved_regs)->regs[regnum] = (next_addr += 2) - 2; | |
403 | thebyte = read_memory_integer (pc, 1); | |
404 | } | |
405 | ||
406 | lose:; | |
407 | ||
195e46ea SC |
408 | /* Remember the address of the frame pointer */ |
409 | (frame_saved_regs)->regs[FP_REGNUM] = (frame_info)->frame; | |
410 | ||
411 | /* This is where the old sp is hidden */ | |
412 | (frame_saved_regs)->regs[SP_REGNUM] = (frame_info)->frame; | |
413 | ||
414 | /* And the PC - remember the pushed FP is always two bytes long */ | |
415 | (frame_saved_regs)->regs[PC_REGNUM] = (frame_info)->frame + 2; | |
416 | } | |
417 | ||
85e07872 | 418 | saved_pc_after_call (frame) |
195e46ea SC |
419 | { |
420 | int x; | |
85e07872 | 421 | int a = read_register (SP_REGNUM); |
edd01519 SC |
422 | x = read_memory_integer (a, code_size); |
423 | if (code_size == 2) | |
424 | { | |
425 | /* Stick current code segement onto top */ | |
426 | x &= 0xffff; | |
427 | x |= read_register (SEG_C_REGNUM) << 16; | |
428 | } | |
429 | x &= 0xffffff; | |
195e46ea SC |
430 | return x; |
431 | } | |
432 | ||
433 | ||
434 | /* Nonzero if instruction at PC is a return instruction. */ | |
435 | ||
85e07872 | 436 | about_to_return (pc) |
195e46ea | 437 | { |
85e07872 | 438 | int b1 = read_memory_integer (pc, 1); |
195e46ea | 439 | |
85e07872 | 440 | switch (b1) |
195e46ea SC |
441 | { |
442 | case 0x14: /* rtd #8 */ | |
443 | case 0x1c: /* rtd #16 */ | |
444 | case 0x19: /* rts */ | |
445 | case 0x1a: /* rte */ | |
446 | return 1; | |
447 | case 0x11: | |
448 | { | |
85e07872 SC |
449 | int b2 = read_memory_integer (pc + 1, 1); |
450 | switch (b2) | |
195e46ea SC |
451 | { |
452 | case 0x18: /* prts */ | |
453 | case 0x14: /* prtd #8 */ | |
454 | case 0x16: /* prtd #16 */ | |
455 | return 1; | |
456 | } | |
457 | } | |
458 | } | |
459 | return 0; | |
460 | } | |
461 | ||
462 | ||
463 | void | |
464 | h8500_set_pointer_size (newsize) | |
465 | int newsize; | |
466 | { | |
467 | static int oldsize = 0; | |
468 | ||
469 | if (oldsize != newsize) | |
470 | { | |
199b2450 | 471 | printf_unfiltered ("pointer size set to %d bits\n", newsize); |
195e46ea SC |
472 | oldsize = newsize; |
473 | if (newsize == 32) | |
474 | { | |
475 | minimum_mode = 0; | |
476 | } | |
477 | else | |
478 | { | |
479 | minimum_mode = 1; | |
480 | } | |
481 | _initialize_gdbtypes (); | |
482 | } | |
483 | } | |
484 | ||
485 | ||
486 | struct cmd_list_element *setmemorylist; | |
487 | ||
488 | ||
edd01519 | 489 | #define C(name,a,b,c) name () { h8500_set_pointer_size(a); code_size = b; data_size = c; } |
195e46ea | 490 | |
63eef03a | 491 | C(big_command, 32,4,4); |
edd01519 SC |
492 | C(medium_command, 32, 4,2); |
493 | C(compact_command, 32,2,4); | |
494 | C(small_command, 16,2,2); | |
195e46ea SC |
495 | |
496 | static void | |
497 | set_memory (args, from_tty) | |
498 | char *args; | |
499 | int from_tty; | |
500 | { | |
199b2450 TL |
501 | printf_unfiltered ("\"set memory\" must be followed by the name of a memory subcommand.\n"); |
502 | help_list (setmemorylist, "set memory ", -1, gdb_stdout); | |
195e46ea SC |
503 | } |
504 | ||
ccf1e898 | 505 | /* See if variable name is ppc or pr[0-7] */ |
195e46ea | 506 | |
ccf1e898 SG |
507 | int |
508 | h8500_is_trapped_internalvar (name) | |
509 | char *name; | |
510 | { | |
511 | if (name[0] != 'p') | |
512 | return 0; | |
513 | ||
85e07872 | 514 | if (strcmp (name + 1, "pc") == 0) |
ccf1e898 SG |
515 | return 1; |
516 | ||
517 | if (name[1] == 'r' | |
518 | && name[2] >= '0' | |
519 | && name[2] <= '7' | |
520 | && name[3] == '\000') | |
521 | return 1; | |
522 | else | |
523 | return 0; | |
524 | } | |
525 | ||
63eef03a | 526 | value_ptr |
ccf1e898 SG |
527 | h8500_value_of_trapped_internalvar (var) |
528 | struct internalvar *var; | |
529 | { | |
530 | LONGEST regval; | |
531 | unsigned char regbuf[4]; | |
532 | int page_regnum, regnum; | |
533 | ||
534 | regnum = var->name[2] == 'c' ? PC_REGNUM : var->name[2] - '0'; | |
535 | ||
536 | switch (var->name[2]) | |
537 | { | |
538 | case 'c': | |
539 | page_regnum = SEG_C_REGNUM; | |
540 | break; | |
85e07872 SC |
541 | case '0': |
542 | case '1': | |
543 | case '2': | |
544 | case '3': | |
ccf1e898 SG |
545 | page_regnum = SEG_D_REGNUM; |
546 | break; | |
85e07872 SC |
547 | case '4': |
548 | case '5': | |
ccf1e898 SG |
549 | page_regnum = SEG_E_REGNUM; |
550 | break; | |
85e07872 SC |
551 | case '6': |
552 | case '7': | |
ccf1e898 SG |
553 | page_regnum = SEG_T_REGNUM; |
554 | break; | |
555 | } | |
556 | ||
557 | get_saved_register (regbuf, NULL, NULL, selected_frame, page_regnum, NULL); | |
558 | regval = regbuf[0] << 16; | |
559 | ||
560 | get_saved_register (regbuf, NULL, NULL, selected_frame, regnum, NULL); | |
561 | regval |= regbuf[0] << 8 | regbuf[1]; /* XXX host/target byte order */ | |
562 | ||
563 | free (var->value); /* Free up old value */ | |
564 | ||
565 | var->value = value_from_longest (builtin_type_unsigned_long, regval); | |
566 | release_value (var->value); /* Unchain new value */ | |
567 | ||
568 | VALUE_LVAL (var->value) = lval_internalvar; | |
569 | VALUE_INTERNALVAR (var->value) = var; | |
570 | return var->value; | |
571 | } | |
572 | ||
573 | void | |
574 | h8500_set_trapped_internalvar (var, newval, bitpos, bitsize, offset) | |
575 | struct internalvar *var; | |
576 | int offset, bitpos, bitsize; | |
63eef03a | 577 | value_ptr newval; |
195e46ea | 578 | { |
ccf1e898 SG |
579 | char *page_regnum, *regnum; |
580 | char expression[100]; | |
581 | unsigned new_regval; | |
582 | struct type *type; | |
583 | enum type_code newval_type_code; | |
584 | ||
585 | type = VALUE_TYPE (newval); | |
586 | newval_type_code = TYPE_CODE (type); | |
587 | ||
588 | if ((newval_type_code != TYPE_CODE_INT | |
589 | && newval_type_code != TYPE_CODE_PTR) | |
85e07872 SC |
590 | || TYPE_LENGTH (type) != sizeof (new_regval)) |
591 | error ("Illegal type (%s) for assignment to $%s\n", | |
592 | TYPE_NAME (type), var->name); | |
195e46ea | 593 | |
85e07872 | 594 | new_regval = *(long *) VALUE_CONTENTS_RAW (newval); |
ccf1e898 SG |
595 | |
596 | regnum = var->name + 1; | |
597 | ||
598 | switch (var->name[2]) | |
599 | { | |
600 | case 'c': | |
601 | page_regnum = "cp"; | |
602 | break; | |
85e07872 SC |
603 | case '0': |
604 | case '1': | |
605 | case '2': | |
606 | case '3': | |
ccf1e898 SG |
607 | page_regnum = "dp"; |
608 | break; | |
85e07872 SC |
609 | case '4': |
610 | case '5': | |
ccf1e898 SG |
611 | page_regnum = "ep"; |
612 | break; | |
85e07872 SC |
613 | case '6': |
614 | case '7': | |
ccf1e898 SG |
615 | page_regnum = "tp"; |
616 | break; | |
617 | } | |
618 | ||
619 | sprintf (expression, "$%s=%d", page_regnum, new_regval >> 16); | |
85e07872 | 620 | parse_and_eval (expression); |
ccf1e898 SG |
621 | |
622 | sprintf (expression, "$%s=%d", regnum, new_regval & 0xffff); | |
85e07872 | 623 | parse_and_eval (expression); |
ccf1e898 SG |
624 | } |
625 | ||
976bb0be | 626 | void |
ccf1e898 SG |
627 | _initialize_h8500_tdep () |
628 | { | |
195e46ea SC |
629 | add_prefix_cmd ("memory", no_class, set_memory, |
630 | "set the memory model", &setmemorylist, "set memory ", 0, | |
631 | &setlist); | |
edd01519 SC |
632 | |
633 | add_cmd ("small", class_support, small_command, | |
634 | "Set small memory model. (16 bit code, 16 bit data)", &setmemorylist); | |
635 | ||
63eef03a SC |
636 | add_cmd ("big", class_support, big_command, |
637 | "Set big memory model. (32 bit code, 32 bit data)", &setmemorylist); | |
edd01519 SC |
638 | |
639 | add_cmd ("medium", class_support, medium_command, | |
640 | "Set medium memory model. (32 bit code, 16 bit data)", &setmemorylist); | |
641 | ||
642 | add_cmd ("compact", class_support, compact_command, | |
643 | "Set compact memory model. (16 bit code, 32 bit data)", &setmemorylist); | |
195e46ea SC |
644 | |
645 | } | |
85e07872 SC |
646 | |
647 | CORE_ADDR | |
648 | target_read_sp () | |
649 | { | |
08c0d7b8 | 650 | return read_register (PR7_REGNUM); |
85e07872 SC |
651 | } |
652 | ||
653 | void | |
654 | target_write_sp (v) | |
655 | CORE_ADDR v; | |
656 | { | |
08c0d7b8 | 657 | write_register (PR7_REGNUM, v); |
85e07872 SC |
658 | } |
659 | ||
660 | CORE_ADDR | |
661 | target_read_pc () | |
662 | { | |
08c0d7b8 | 663 | return read_register (PC_REGNUM); |
85e07872 SC |
664 | } |
665 | ||
666 | void | |
667 | target_write_pc (v) | |
668 | CORE_ADDR v; | |
669 | { | |
08c0d7b8 | 670 | write_register (PC_REGNUM, v); |
85e07872 SC |
671 | } |
672 | ||
673 | CORE_ADDR | |
674 | target_read_fp () | |
675 | { | |
08c0d7b8 | 676 | return read_register (PR6_REGNUM); |
85e07872 SC |
677 | } |
678 | ||
679 | void | |
680 | target_write_fp (v) | |
681 | CORE_ADDR v; | |
682 | { | |
08c0d7b8 | 683 | write_register (PR6_REGNUM, v); |
85e07872 | 684 | } |
1468bec9 | 685 |