Commit | Line | Data |
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c906108c | 1 | /* Target-dependent code for Hitachi H8/500, for GDB. |
cda5a58a AC |
2 | |
3 | Copyright 1993, 1994, 1995, 1998, 2000, 2001, 2002 Free Software | |
4 | Foundation, Inc. | |
c906108c | 5 | |
c5aa993b | 6 | This file is part of GDB. |
c906108c | 7 | |
c5aa993b JM |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
c906108c | 12 | |
c5aa993b JM |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
c906108c | 17 | |
c5aa993b JM |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
22 | |
23 | /* | |
c5aa993b JM |
24 | Contributed by Steve Chamberlain |
25 | sac@cygnus.com | |
c906108c SS |
26 | */ |
27 | ||
28 | #include "defs.h" | |
29 | #include "frame.h" | |
c906108c SS |
30 | #include "symtab.h" |
31 | #include "gdbtypes.h" | |
32 | #include "gdbcmd.h" | |
33 | #include "value.h" | |
34 | #include "dis-asm.h" | |
35 | #include "gdbcore.h" | |
4e052eda | 36 | #include "regcache.h" |
c906108c SS |
37 | |
38 | #define UNSIGNED_SHORT(X) ((X) & 0xffff) | |
39 | ||
40 | static int code_size = 2; | |
41 | ||
42 | static int data_size = 2; | |
43 | ||
44 | /* Shape of an H8/500 frame : | |
45 | ||
46 | arg-n | |
47 | .. | |
48 | arg-2 | |
49 | arg-1 | |
50 | return address <2 or 4 bytes> | |
c5aa993b | 51 | old fp <2 bytes> |
c906108c SS |
52 | auto-n |
53 | .. | |
54 | auto-1 | |
55 | saved registers | |
56 | ||
c5aa993b | 57 | */ |
c906108c SS |
58 | |
59 | /* an easy to debug H8 stack frame looks like: | |
c5aa993b JM |
60 | 0x6df6 push r6 |
61 | 0x0d76 mov.w r7,r6 | |
62 | 0x6dfn push reg | |
63 | 0x7905 nnnn mov.w #n,r5 or 0x1b87 subs #2,sp | |
64 | 0x1957 sub.w r5,sp | |
c906108c SS |
65 | |
66 | */ | |
67 | ||
68 | #define IS_PUSH(x) (((x) & 0xff00)==0x6d00) | |
69 | #define IS_LINK_8(x) ((x) == 0x17) | |
70 | #define IS_LINK_16(x) ((x) == 0x1f) | |
71 | #define IS_MOVE_FP(x) ((x) == 0x0d76) | |
72 | #define IS_MOV_SP_FP(x) ((x) == 0x0d76) | |
73 | #define IS_SUB2_SP(x) ((x) == 0x1b87) | |
74 | #define IS_MOVK_R5(x) ((x) == 0x7905) | |
75 | #define IS_SUB_R5SP(x) ((x) == 0x1957) | |
76 | ||
77 | #define LINK_8 0x17 | |
78 | #define LINK_16 0x1f | |
79 | ||
80 | int minimum_mode = 1; | |
81 | ||
82 | CORE_ADDR | |
fba45db2 | 83 | h8500_skip_prologue (CORE_ADDR start_pc) |
c906108c SS |
84 | { |
85 | short int w; | |
86 | ||
87 | w = read_memory_integer (start_pc, 1); | |
88 | if (w == LINK_8) | |
89 | { | |
90 | start_pc += 2; | |
91 | w = read_memory_integer (start_pc, 1); | |
92 | } | |
93 | ||
94 | if (w == LINK_16) | |
95 | { | |
96 | start_pc += 3; | |
97 | w = read_memory_integer (start_pc, 2); | |
98 | } | |
99 | ||
100 | return start_pc; | |
101 | } | |
102 | ||
103 | CORE_ADDR | |
fba45db2 | 104 | h8500_addr_bits_remove (CORE_ADDR addr) |
c906108c SS |
105 | { |
106 | return ((addr) & 0xffffff); | |
107 | } | |
108 | ||
109 | /* Given a GDB frame, determine the address of the calling function's frame. | |
110 | This will be used to create a new GDB frame struct, and then | |
111 | INIT_EXTRA_FRAME_INFO and INIT_FRAME_PC will be called for the new frame. | |
112 | ||
113 | For us, the frame address is its stack pointer value, so we look up | |
114 | the function prologue to determine the caller's sp value, and return it. */ | |
115 | ||
116 | CORE_ADDR | |
fba45db2 | 117 | h8500_frame_chain (struct frame_info *thisframe) |
c906108c SS |
118 | { |
119 | if (!inside_entry_file (thisframe->pc)) | |
120 | return (read_memory_integer (FRAME_FP (thisframe), PTR_SIZE)); | |
121 | else | |
122 | return 0; | |
123 | } | |
124 | ||
125 | /* Fetch the instruction at ADDR, returning 0 if ADDR is beyond LIM or | |
126 | is not the address of a valid instruction, the address of the next | |
127 | instruction beyond ADDR otherwise. *PWORD1 receives the first word | |
c5aa993b | 128 | of the instruction. */ |
c906108c SS |
129 | |
130 | CORE_ADDR | |
fba45db2 | 131 | NEXT_PROLOGUE_INSN (CORE_ADDR addr, CORE_ADDR lim, char *pword1) |
c906108c SS |
132 | { |
133 | if (addr < lim + 8) | |
134 | { | |
135 | read_memory (addr, pword1, 1); | |
136 | read_memory (addr, pword1 + 1, 1); | |
137 | return 1; | |
138 | } | |
139 | return 0; | |
140 | } | |
141 | ||
142 | /* Examine the prologue of a function. `ip' points to the first | |
143 | instruction. `limit' is the limit of the prologue (e.g. the addr | |
144 | of the first linenumber, or perhaps the program counter if we're | |
145 | stepping through). `frame_sp' is the stack pointer value in use in | |
146 | this frame. `fsr' is a pointer to a frame_saved_regs structure | |
147 | into which we put info about the registers saved by this frame. | |
148 | `fi' is a struct frame_info pointer; we fill in various fields in | |
149 | it to reflect the offsets of the arg pointer and the locals | |
150 | pointer. */ | |
151 | ||
152 | /* Return the saved PC from this frame. */ | |
153 | ||
154 | CORE_ADDR | |
fba45db2 | 155 | frame_saved_pc (struct frame_info *frame) |
c906108c SS |
156 | { |
157 | return read_memory_integer (FRAME_FP (frame) + 2, PTR_SIZE); | |
158 | } | |
159 | ||
c5aa993b | 160 | void |
fba45db2 | 161 | h8500_pop_frame (void) |
c906108c SS |
162 | { |
163 | unsigned regnum; | |
164 | struct frame_saved_regs fsr; | |
165 | struct frame_info *frame = get_current_frame (); | |
166 | ||
167 | get_frame_saved_regs (frame, &fsr); | |
168 | ||
169 | for (regnum = 0; regnum < 8; regnum++) | |
170 | { | |
171 | if (fsr.regs[regnum]) | |
172 | write_register (regnum, read_memory_short (fsr.regs[regnum])); | |
173 | ||
174 | flush_cached_frames (); | |
175 | } | |
176 | } | |
177 | ||
c5646e11 AC |
178 | static void |
179 | h8500_print_register_hook (int regno) | |
c906108c SS |
180 | { |
181 | if (regno == CCR_REGNUM) | |
182 | { | |
183 | /* CCR register */ | |
184 | ||
185 | int C, Z, N, V; | |
186 | unsigned char b[2]; | |
187 | unsigned char l; | |
188 | ||
cda5a58a | 189 | frame_register_read (selected_frame, regno, b); |
c906108c SS |
190 | l = b[1]; |
191 | printf_unfiltered ("\t"); | |
192 | printf_unfiltered ("I-%d - ", (l & 0x80) != 0); | |
193 | N = (l & 0x8) != 0; | |
194 | Z = (l & 0x4) != 0; | |
195 | V = (l & 0x2) != 0; | |
196 | C = (l & 0x1) != 0; | |
197 | printf_unfiltered ("N-%d ", N); | |
198 | printf_unfiltered ("Z-%d ", Z); | |
199 | printf_unfiltered ("V-%d ", V); | |
200 | printf_unfiltered ("C-%d ", C); | |
201 | if ((C | Z) == 0) | |
202 | printf_unfiltered ("u> "); | |
203 | if ((C | Z) == 1) | |
204 | printf_unfiltered ("u<= "); | |
205 | if ((C == 0)) | |
206 | printf_unfiltered ("u>= "); | |
207 | if (C == 1) | |
208 | printf_unfiltered ("u< "); | |
209 | if (Z == 0) | |
210 | printf_unfiltered ("!= "); | |
211 | if (Z == 1) | |
212 | printf_unfiltered ("== "); | |
213 | if ((N ^ V) == 0) | |
214 | printf_unfiltered (">= "); | |
215 | if ((N ^ V) == 1) | |
216 | printf_unfiltered ("< "); | |
217 | if ((Z | (N ^ V)) == 0) | |
218 | printf_unfiltered ("> "); | |
219 | if ((Z | (N ^ V)) == 1) | |
220 | printf_unfiltered ("<= "); | |
221 | } | |
222 | } | |
223 | ||
c5646e11 AC |
224 | static void |
225 | h8500_print_registers_info (struct gdbarch *gdbarch, | |
226 | struct ui_file *file, | |
227 | struct frame_info *frame, | |
228 | int regnum, int print_all) | |
229 | { | |
230 | int i; | |
231 | const int numregs = NUM_REGS + NUM_PSEUDO_REGS; | |
232 | char *raw_buffer = alloca (MAX_REGISTER_RAW_SIZE); | |
233 | char *virtual_buffer = alloca (MAX_REGISTER_VIRTUAL_SIZE); | |
234 | ||
235 | for (i = 0; i < numregs; i++) | |
236 | { | |
237 | /* Decide between printing all regs, non-float / vector regs, or | |
238 | specific reg. */ | |
239 | if (regnum == -1) | |
240 | { | |
241 | if (!print_all) | |
242 | { | |
243 | if (TYPE_CODE (REGISTER_VIRTUAL_TYPE (i)) == TYPE_CODE_FLT) | |
244 | continue; | |
245 | if (TYPE_VECTOR (REGISTER_VIRTUAL_TYPE (i))) | |
246 | continue; | |
247 | } | |
248 | } | |
249 | else | |
250 | { | |
251 | if (i != regnum) | |
252 | continue; | |
253 | } | |
254 | ||
255 | /* If the register name is empty, it is undefined for this | |
256 | processor, so don't display anything. */ | |
257 | if (REGISTER_NAME (i) == NULL || *(REGISTER_NAME (i)) == '\0') | |
258 | continue; | |
259 | ||
260 | fputs_filtered (REGISTER_NAME (i), file); | |
261 | print_spaces_filtered (15 - strlen (REGISTER_NAME (i)), file); | |
262 | ||
263 | /* Get the data in raw format. */ | |
264 | if (! frame_register_read (frame, i, raw_buffer)) | |
265 | { | |
266 | fprintf_filtered (file, "*value not available*\n"); | |
267 | continue; | |
268 | } | |
269 | ||
270 | /* FIXME: cagney/2002-08-03: This code shouldn't be necessary. | |
271 | The function frame_register_read() should have returned the | |
272 | pre-cooked register so no conversion is necessary. */ | |
273 | /* Convert raw data to virtual format if necessary. */ | |
274 | if (REGISTER_CONVERTIBLE (i)) | |
275 | { | |
276 | REGISTER_CONVERT_TO_VIRTUAL (i, REGISTER_VIRTUAL_TYPE (i), | |
277 | raw_buffer, virtual_buffer); | |
278 | } | |
279 | else | |
280 | { | |
281 | memcpy (virtual_buffer, raw_buffer, | |
282 | REGISTER_VIRTUAL_SIZE (i)); | |
283 | } | |
284 | ||
285 | /* If virtual format is floating, print it that way, and in raw | |
286 | hex. */ | |
287 | if (TYPE_CODE (REGISTER_VIRTUAL_TYPE (i)) == TYPE_CODE_FLT) | |
288 | { | |
289 | int j; | |
290 | ||
291 | val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0, | |
292 | file, 0, 1, 0, Val_pretty_default); | |
293 | ||
294 | fprintf_filtered (file, "\t(raw 0x"); | |
295 | for (j = 0; j < REGISTER_RAW_SIZE (i); j++) | |
296 | { | |
297 | int idx; | |
298 | if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) | |
299 | idx = j; | |
300 | else | |
301 | idx = REGISTER_RAW_SIZE (i) - 1 - j; | |
302 | fprintf_filtered (file, "%02x", (unsigned char) raw_buffer[idx]); | |
303 | } | |
304 | fprintf_filtered (file, ")"); | |
305 | } | |
306 | else | |
307 | { | |
308 | /* Print the register in hex. */ | |
309 | val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0, | |
310 | file, 'x', 1, 0, Val_pretty_default); | |
311 | /* If not a vector register, print it also according to its | |
312 | natural format. */ | |
313 | if (TYPE_VECTOR (REGISTER_VIRTUAL_TYPE (i)) == 0) | |
314 | { | |
315 | fprintf_filtered (file, "\t"); | |
316 | val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0, | |
317 | file, 0, 1, 0, Val_pretty_default); | |
318 | } | |
319 | } | |
320 | ||
321 | /* Some h8500 specific info. */ | |
322 | h8500_print_register_hook (i); | |
323 | ||
324 | fprintf_filtered (file, "\n"); | |
325 | } | |
326 | } | |
327 | ||
328 | void | |
329 | h8500_do_registers_info (int regnum, int all) | |
330 | { | |
331 | h8500_print_registers_info (current_gdbarch, gdb_stdout, selected_frame, | |
332 | regnum, all); | |
333 | } | |
334 | ||
c906108c | 335 | int |
fba45db2 | 336 | h8500_register_size (int regno) |
c906108c SS |
337 | { |
338 | switch (regno) | |
339 | { | |
340 | case SEG_C_REGNUM: | |
341 | case SEG_D_REGNUM: | |
342 | case SEG_E_REGNUM: | |
343 | case SEG_T_REGNUM: | |
344 | return 1; | |
345 | case R0_REGNUM: | |
346 | case R1_REGNUM: | |
347 | case R2_REGNUM: | |
348 | case R3_REGNUM: | |
349 | case R4_REGNUM: | |
350 | case R5_REGNUM: | |
351 | case R6_REGNUM: | |
352 | case R7_REGNUM: | |
353 | case CCR_REGNUM: | |
354 | return 2; | |
355 | ||
356 | case PR0_REGNUM: | |
357 | case PR1_REGNUM: | |
358 | case PR2_REGNUM: | |
359 | case PR3_REGNUM: | |
360 | case PR4_REGNUM: | |
361 | case PR5_REGNUM: | |
362 | case PR6_REGNUM: | |
363 | case PR7_REGNUM: | |
364 | case PC_REGNUM: | |
365 | return 4; | |
366 | default: | |
e1e9e218 | 367 | internal_error (__FILE__, __LINE__, "failed internal consistency check"); |
c906108c SS |
368 | } |
369 | } | |
370 | ||
371 | struct type * | |
fba45db2 | 372 | h8500_register_virtual_type (int regno) |
c906108c SS |
373 | { |
374 | switch (regno) | |
375 | { | |
376 | case SEG_C_REGNUM: | |
377 | case SEG_E_REGNUM: | |
378 | case SEG_D_REGNUM: | |
379 | case SEG_T_REGNUM: | |
380 | return builtin_type_unsigned_char; | |
381 | case R0_REGNUM: | |
382 | case R1_REGNUM: | |
383 | case R2_REGNUM: | |
384 | case R3_REGNUM: | |
385 | case R4_REGNUM: | |
386 | case R5_REGNUM: | |
387 | case R6_REGNUM: | |
388 | case R7_REGNUM: | |
389 | case CCR_REGNUM: | |
390 | return builtin_type_unsigned_short; | |
391 | case PR0_REGNUM: | |
392 | case PR1_REGNUM: | |
393 | case PR2_REGNUM: | |
394 | case PR3_REGNUM: | |
395 | case PR4_REGNUM: | |
396 | case PR5_REGNUM: | |
397 | case PR6_REGNUM: | |
398 | case PR7_REGNUM: | |
399 | case PC_REGNUM: | |
400 | return builtin_type_unsigned_long; | |
401 | default: | |
e1e9e218 | 402 | internal_error (__FILE__, __LINE__, "failed internal consistency check"); |
c906108c SS |
403 | } |
404 | } | |
405 | ||
406 | /* Put here the code to store, into a struct frame_saved_regs, | |
407 | the addresses of the saved registers of frame described by FRAME_INFO. | |
408 | This includes special registers such as pc and fp saved in special | |
409 | ways in the stack frame. sp is even more special: | |
410 | the address we return for it IS the sp for the next frame. */ | |
411 | ||
412 | void | |
fba45db2 KB |
413 | frame_find_saved_regs (struct frame_info *frame_info, |
414 | struct frame_saved_regs *frame_saved_regs) | |
c906108c SS |
415 | { |
416 | register int regnum; | |
417 | register int regmask; | |
418 | register CORE_ADDR next_addr; | |
419 | register CORE_ADDR pc; | |
420 | unsigned char thebyte; | |
421 | ||
422 | memset (frame_saved_regs, '\0', sizeof *frame_saved_regs); | |
423 | ||
424 | if ((frame_info)->pc >= (frame_info)->frame - CALL_DUMMY_LENGTH - FP_REGNUM * 4 - 4 | |
425 | && (frame_info)->pc <= (frame_info)->frame) | |
426 | { | |
427 | next_addr = (frame_info)->frame; | |
428 | pc = (frame_info)->frame - CALL_DUMMY_LENGTH - FP_REGNUM * 4 - 4; | |
429 | } | |
430 | else | |
431 | { | |
432 | pc = get_pc_function_start ((frame_info)->pc); | |
433 | /* Verify we have a link a6 instruction next; | |
c5aa993b JM |
434 | if not we lose. If we win, find the address above the saved |
435 | regs using the amount of storage from the link instruction. | |
436 | */ | |
c906108c SS |
437 | |
438 | thebyte = read_memory_integer (pc, 1); | |
439 | if (0x1f == thebyte) | |
440 | next_addr = (frame_info)->frame + read_memory_integer (pc += 1, 2), pc += 2; | |
441 | else if (0x17 == thebyte) | |
442 | next_addr = (frame_info)->frame + read_memory_integer (pc += 1, 1), pc += 1; | |
443 | else | |
444 | goto lose; | |
445 | #if 0 | |
446 | /* FIXME steve */ | |
447 | /* If have an add:g.waddal #-n, sp next, adjust next_addr. */ | |
448 | if ((0x0c0177777 & read_memory_integer (pc, 2)) == 0157774) | |
449 | next_addr += read_memory_integer (pc += 2, 4), pc += 4; | |
450 | #endif | |
451 | } | |
452 | ||
453 | thebyte = read_memory_integer (pc, 1); | |
454 | if (thebyte == 0x12) | |
455 | { | |
456 | /* Got stm */ | |
457 | pc++; | |
458 | regmask = read_memory_integer (pc, 1); | |
459 | pc++; | |
460 | for (regnum = 0; regnum < 8; regnum++, regmask >>= 1) | |
461 | { | |
462 | if (regmask & 1) | |
463 | { | |
464 | (frame_saved_regs)->regs[regnum] = (next_addr += 2) - 2; | |
465 | } | |
466 | } | |
467 | thebyte = read_memory_integer (pc, 1); | |
468 | } | |
469 | /* Maybe got a load of pushes */ | |
470 | while (thebyte == 0xbf) | |
471 | { | |
472 | pc++; | |
473 | regnum = read_memory_integer (pc, 1) & 0x7; | |
474 | pc++; | |
475 | (frame_saved_regs)->regs[regnum] = (next_addr += 2) - 2; | |
476 | thebyte = read_memory_integer (pc, 1); | |
477 | } | |
478 | ||
479 | lose:; | |
480 | ||
481 | /* Remember the address of the frame pointer */ | |
482 | (frame_saved_regs)->regs[FP_REGNUM] = (frame_info)->frame; | |
483 | ||
484 | /* This is where the old sp is hidden */ | |
485 | (frame_saved_regs)->regs[SP_REGNUM] = (frame_info)->frame; | |
486 | ||
487 | /* And the PC - remember the pushed FP is always two bytes long */ | |
488 | (frame_saved_regs)->regs[PC_REGNUM] = (frame_info)->frame + 2; | |
489 | } | |
490 | ||
491 | CORE_ADDR | |
fba45db2 | 492 | saved_pc_after_call (void) |
c906108c SS |
493 | { |
494 | int x; | |
495 | int a = read_register (SP_REGNUM); | |
496 | ||
497 | x = read_memory_integer (a, code_size); | |
498 | if (code_size == 2) | |
499 | { | |
500 | /* Stick current code segement onto top */ | |
501 | x &= 0xffff; | |
502 | x |= read_register (SEG_C_REGNUM) << 16; | |
503 | } | |
504 | x &= 0xffffff; | |
505 | return x; | |
506 | } | |
507 | ||
508 | void | |
fba45db2 | 509 | h8500_set_pointer_size (int newsize) |
c906108c SS |
510 | { |
511 | static int oldsize = 0; | |
512 | ||
513 | if (oldsize != newsize) | |
514 | { | |
515 | printf_unfiltered ("pointer size set to %d bits\n", newsize); | |
516 | oldsize = newsize; | |
517 | if (newsize == 32) | |
518 | { | |
519 | minimum_mode = 0; | |
520 | } | |
521 | else | |
522 | { | |
523 | minimum_mode = 1; | |
524 | } | |
525 | _initialize_gdbtypes (); | |
526 | } | |
527 | } | |
528 | ||
529 | static void | |
55d80160 | 530 | big_command (char *arg, int from_tty) |
c906108c SS |
531 | { |
532 | h8500_set_pointer_size (32); | |
533 | code_size = 4; | |
534 | data_size = 4; | |
535 | } | |
536 | ||
537 | static void | |
55d80160 | 538 | medium_command (char *arg, int from_tty) |
c906108c SS |
539 | { |
540 | h8500_set_pointer_size (32); | |
541 | code_size = 4; | |
542 | data_size = 2; | |
543 | } | |
544 | ||
545 | static void | |
55d80160 | 546 | compact_command (char *arg, int from_tty) |
c906108c SS |
547 | { |
548 | h8500_set_pointer_size (32); | |
549 | code_size = 2; | |
550 | data_size = 4; | |
551 | } | |
552 | ||
553 | static void | |
55d80160 | 554 | small_command (char *arg, int from_tty) |
c906108c SS |
555 | { |
556 | h8500_set_pointer_size (16); | |
557 | code_size = 2; | |
558 | data_size = 2; | |
559 | } | |
560 | ||
561 | static struct cmd_list_element *setmemorylist; | |
562 | ||
563 | static void | |
fba45db2 | 564 | set_memory (char *args, int from_tty) |
c906108c SS |
565 | { |
566 | printf_unfiltered ("\"set memory\" must be followed by the name of a memory subcommand.\n"); | |
567 | help_list (setmemorylist, "set memory ", -1, gdb_stdout); | |
568 | } | |
569 | ||
570 | /* See if variable name is ppc or pr[0-7] */ | |
571 | ||
572 | int | |
fba45db2 | 573 | h8500_is_trapped_internalvar (char *name) |
c906108c SS |
574 | { |
575 | if (name[0] != 'p') | |
576 | return 0; | |
577 | ||
578 | if (strcmp (name + 1, "pc") == 0) | |
579 | return 1; | |
580 | ||
581 | if (name[1] == 'r' | |
582 | && name[2] >= '0' | |
583 | && name[2] <= '7' | |
584 | && name[3] == '\000') | |
585 | return 1; | |
586 | else | |
587 | return 0; | |
588 | } | |
589 | ||
ea7c478f | 590 | struct value * |
fba45db2 | 591 | h8500_value_of_trapped_internalvar (struct internalvar *var) |
c906108c SS |
592 | { |
593 | LONGEST regval; | |
594 | unsigned char regbuf[4]; | |
595 | int page_regnum, regnum; | |
596 | ||
597 | regnum = var->name[2] == 'c' ? PC_REGNUM : var->name[2] - '0'; | |
598 | ||
599 | switch (var->name[2]) | |
600 | { | |
601 | case 'c': | |
602 | page_regnum = SEG_C_REGNUM; | |
603 | break; | |
604 | case '0': | |
605 | case '1': | |
606 | case '2': | |
607 | case '3': | |
608 | page_regnum = SEG_D_REGNUM; | |
609 | break; | |
610 | case '4': | |
611 | case '5': | |
612 | page_regnum = SEG_E_REGNUM; | |
613 | break; | |
614 | case '6': | |
615 | case '7': | |
616 | page_regnum = SEG_T_REGNUM; | |
617 | break; | |
618 | } | |
619 | ||
620 | get_saved_register (regbuf, NULL, NULL, selected_frame, page_regnum, NULL); | |
621 | regval = regbuf[0] << 16; | |
622 | ||
623 | get_saved_register (regbuf, NULL, NULL, selected_frame, regnum, NULL); | |
c5aa993b | 624 | regval |= regbuf[0] << 8 | regbuf[1]; /* XXX host/target byte order */ |
c906108c | 625 | |
b8c9b27d | 626 | xfree (var->value); /* Free up old value */ |
c906108c SS |
627 | |
628 | var->value = value_from_longest (builtin_type_unsigned_long, regval); | |
629 | release_value (var->value); /* Unchain new value */ | |
630 | ||
631 | VALUE_LVAL (var->value) = lval_internalvar; | |
632 | VALUE_INTERNALVAR (var->value) = var; | |
633 | return var->value; | |
634 | } | |
635 | ||
636 | void | |
ea7c478f | 637 | h8500_set_trapped_internalvar (struct internalvar *var, struct value *newval, |
fba45db2 | 638 | int bitpos, int bitsize, int offset) |
c906108c SS |
639 | { |
640 | char *page_regnum, *regnum; | |
641 | char expression[100]; | |
642 | unsigned new_regval; | |
643 | struct type *type; | |
644 | enum type_code newval_type_code; | |
645 | ||
646 | type = check_typedef (VALUE_TYPE (newval)); | |
647 | newval_type_code = TYPE_CODE (type); | |
648 | ||
649 | if ((newval_type_code != TYPE_CODE_INT | |
650 | && newval_type_code != TYPE_CODE_PTR) | |
651 | || TYPE_LENGTH (type) != sizeof (new_regval)) | |
652 | error ("Illegal type (%s) for assignment to $%s\n", | |
653 | TYPE_NAME (VALUE_TYPE (newval)), var->name); | |
654 | ||
655 | new_regval = *(long *) VALUE_CONTENTS_RAW (newval); | |
656 | ||
657 | regnum = var->name + 1; | |
658 | ||
659 | switch (var->name[2]) | |
660 | { | |
661 | case 'c': | |
662 | page_regnum = "cp"; | |
663 | break; | |
664 | case '0': | |
665 | case '1': | |
666 | case '2': | |
667 | case '3': | |
668 | page_regnum = "dp"; | |
669 | break; | |
670 | case '4': | |
671 | case '5': | |
672 | page_regnum = "ep"; | |
673 | break; | |
674 | case '6': | |
675 | case '7': | |
676 | page_regnum = "tp"; | |
677 | break; | |
678 | } | |
679 | ||
680 | sprintf (expression, "$%s=%d", page_regnum, new_regval >> 16); | |
681 | parse_and_eval (expression); | |
682 | ||
683 | sprintf (expression, "$%s=%d", regnum, new_regval & 0xffff); | |
684 | parse_and_eval (expression); | |
685 | } | |
686 | ||
687 | CORE_ADDR | |
fba45db2 | 688 | h8500_read_sp (void) |
c906108c SS |
689 | { |
690 | return read_register (PR7_REGNUM); | |
691 | } | |
692 | ||
693 | void | |
fba45db2 | 694 | h8500_write_sp (CORE_ADDR v) |
c906108c SS |
695 | { |
696 | write_register (PR7_REGNUM, v); | |
697 | } | |
698 | ||
699 | CORE_ADDR | |
39f77062 | 700 | h8500_read_pc (ptid_t ptid) |
c906108c SS |
701 | { |
702 | return read_register (PC_REGNUM); | |
703 | } | |
704 | ||
705 | void | |
39f77062 | 706 | h8500_write_pc (CORE_ADDR v, ptid_t ptid) |
c906108c SS |
707 | { |
708 | write_register (PC_REGNUM, v); | |
709 | } | |
710 | ||
711 | CORE_ADDR | |
fba45db2 | 712 | h8500_read_fp (void) |
c906108c SS |
713 | { |
714 | return read_register (PR6_REGNUM); | |
715 | } | |
716 | ||
c906108c | 717 | void |
fba45db2 | 718 | _initialize_h8500_tdep (void) |
c906108c SS |
719 | { |
720 | tm_print_insn = print_insn_h8500; | |
721 | ||
722 | add_prefix_cmd ("memory", no_class, set_memory, | |
723 | "set the memory model", &setmemorylist, "set memory ", 0, | |
724 | &setlist); | |
725 | ||
726 | add_cmd ("small", class_support, small_command, | |
c5aa993b | 727 | "Set small memory model. (16 bit code, 16 bit data)", &setmemorylist); |
c906108c SS |
728 | |
729 | add_cmd ("big", class_support, big_command, | |
c5aa993b | 730 | "Set big memory model. (32 bit code, 32 bit data)", &setmemorylist); |
c906108c SS |
731 | |
732 | add_cmd ("medium", class_support, medium_command, | |
c5aa993b | 733 | "Set medium memory model. (32 bit code, 16 bit data)", &setmemorylist); |
c906108c SS |
734 | |
735 | add_cmd ("compact", class_support, compact_command, | |
c5aa993b | 736 | "Set compact memory model. (16 bit code, 32 bit data)", &setmemorylist); |
c906108c SS |
737 | |
738 | } |