Commit | Line | Data |
---|---|---|
0c884e17 | 1 | /* Target-dependent code for the Sanyo Xstormy16a (LC590000) processor. |
f4f9705a AC |
2 | |
3 | Copyright 2001, 2002 Free Software Foundation, Inc. | |
0c884e17 CV |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include "value.h" | |
24 | #include "inferior.h" | |
25 | #include "symfile.h" | |
26 | #include "arch-utils.h" | |
27 | #include "regcache.h" | |
28 | #include "gdbcore.h" | |
29 | #include "objfiles.h" | |
30 | ||
31 | struct gdbarch_tdep | |
32 | { | |
33 | /* gdbarch target dependent data here. Currently unused for Xstormy16. */ | |
34 | }; | |
35 | ||
36 | /* Extra info which is saved in each frame_info. */ | |
37 | struct frame_extra_info | |
38 | { | |
39 | int framesize; | |
40 | int frameless_p; | |
41 | }; | |
42 | ||
43 | enum gdb_regnum | |
44 | { | |
45 | /* Xstormy16 has 16 general purpose registers (R0-R15) plus PC. | |
46 | Functions will return their values in register R2-R7 as they fit. | |
47 | Otherwise a hidden pointer to an big enough area is given as argument | |
48 | to the function in r2. Further arguments are beginning in r3 then. | |
49 | R13 is used as frame pointer when GCC compiles w/o optimization | |
50 | R14 is used as "PSW", displaying the CPU status. | |
51 | R15 is used implicitely as stack pointer. */ | |
52 | E_R0_REGNUM, | |
53 | E_R1_REGNUM, | |
54 | E_R2_REGNUM, E_1ST_ARG_REGNUM = E_R2_REGNUM, E_PTR_RET_REGNUM = E_R2_REGNUM, | |
55 | E_R3_REGNUM, | |
56 | E_R4_REGNUM, | |
57 | E_R5_REGNUM, | |
58 | E_R6_REGNUM, | |
59 | E_R7_REGNUM, E_LST_ARG_REGNUM = E_R7_REGNUM, | |
60 | E_R8_REGNUM, | |
61 | E_R9_REGNUM, | |
62 | E_R10_REGNUM, | |
63 | E_R11_REGNUM, | |
64 | E_R12_REGNUM, | |
65 | E_R13_REGNUM, E_FP_REGNUM = E_R13_REGNUM, | |
66 | E_R14_REGNUM, E_PSW_REGNUM = E_R14_REGNUM, | |
67 | E_R15_REGNUM, E_SP_REGNUM = E_R15_REGNUM, | |
68 | E_PC_REGNUM, | |
69 | E_NUM_REGS | |
70 | }; | |
71 | ||
72 | /* Size of instructions, registers, etc. */ | |
73 | enum | |
74 | { | |
75 | xstormy16_inst_size = 2, | |
76 | xstormy16_reg_size = 2, | |
77 | xstormy16_pc_size = 4 | |
78 | }; | |
79 | ||
80 | /* Size of return datatype which fits into the remaining return registers. */ | |
81 | #define E_MAX_RETTYPE_SIZE(regnum) ((E_LST_ARG_REGNUM - (regnum) + 1) \ | |
82 | * xstormy16_reg_size) | |
83 | ||
84 | /* Size of return datatype which fits into all return registers. */ | |
85 | enum | |
86 | { | |
87 | E_MAX_RETTYPE_SIZE_IN_REGS = E_MAX_RETTYPE_SIZE (E_R2_REGNUM) | |
88 | }; | |
89 | ||
90 | ||
91 | /* Size of all registers as a whole. */ | |
92 | enum | |
93 | { | |
94 | E_ALL_REGS_SIZE = (E_NUM_REGS - 1) * xstormy16_reg_size + xstormy16_pc_size | |
95 | }; | |
96 | ||
97 | /* Function: xstormy16_register_name | |
98 | Returns the name of the standard Xstormy16 register N. */ | |
99 | ||
100 | static char * | |
101 | xstormy16_register_name (int regnum) | |
102 | { | |
103 | static char *register_names[] = { | |
104 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
105 | "r8", "r9", "r10", "r11", "r12", "r13", | |
106 | "psw", "sp", "pc" | |
107 | }; | |
108 | ||
109 | if (regnum < 0 || | |
110 | regnum >= sizeof (register_names) / sizeof (register_names[0])) | |
111 | internal_error (__FILE__, __LINE__, | |
112 | "xstormy16_register_name: illegal register number %d", | |
113 | regnum); | |
114 | else | |
115 | return register_names[regnum]; | |
116 | ||
117 | } | |
118 | ||
119 | /* Function: xstormy16_register_byte | |
120 | Returns the byte position in the register cache for register N. */ | |
121 | ||
122 | static int | |
123 | xstormy16_register_byte (int regnum) | |
124 | { | |
125 | if (regnum < 0 || regnum >= E_NUM_REGS) | |
126 | internal_error (__FILE__, __LINE__, | |
127 | "xstormy16_register_byte: illegal register number %d", | |
128 | regnum); | |
129 | else | |
130 | /* All registers occupy 2 bytes in the regcache except for PC | |
131 | which is the last one. Therefore the byte position is still | |
132 | simply a multiple of 2. */ | |
133 | return regnum * xstormy16_reg_size; | |
134 | } | |
135 | ||
136 | /* Function: xstormy16_register_raw_size | |
137 | Returns the number of bytes occupied by the register on the target. */ | |
138 | ||
139 | static int | |
140 | xstormy16_register_raw_size (int regnum) | |
141 | { | |
142 | if (regnum < 0 || regnum >= E_NUM_REGS) | |
143 | internal_error (__FILE__, __LINE__, | |
144 | "xstormy16_register_raw_size: illegal register number %d", | |
145 | regnum); | |
146 | /* Only the PC has 4 Byte, all other registers 2 Byte. */ | |
147 | else if (regnum == E_PC_REGNUM) | |
148 | return xstormy16_pc_size; | |
149 | else | |
150 | return xstormy16_reg_size; | |
151 | } | |
152 | ||
153 | /* Function: xstormy16_register_virtual_size | |
154 | Returns the number of bytes occupied by the register as represented | |
155 | internally by gdb. */ | |
156 | ||
157 | static int | |
158 | xstormy16_register_virtual_size (int regnum) | |
159 | { | |
160 | return xstormy16_register_raw_size (regnum); | |
161 | } | |
162 | ||
163 | /* Function: xstormy16_reg_virtual_type | |
164 | Returns the default type for register N. */ | |
165 | ||
166 | static struct type * | |
167 | xstormy16_reg_virtual_type (int regnum) | |
168 | { | |
169 | if (regnum < 0 || regnum >= E_NUM_REGS) | |
170 | internal_error (__FILE__, __LINE__, | |
171 | "xstormy16_register_virtual_type: illegal register number %d", | |
172 | regnum); | |
173 | else if (regnum == E_PC_REGNUM) | |
174 | return builtin_type_uint32; | |
175 | else | |
176 | return builtin_type_uint16; | |
177 | } | |
178 | ||
179 | /* Function: xstormy16_get_saved_register | |
180 | Find a register's saved value on the call stack. */ | |
181 | ||
182 | static void | |
183 | xstormy16_get_saved_register (char *raw_buffer, | |
184 | int *optimized, | |
185 | CORE_ADDR *addrp, | |
186 | struct frame_info *fi, | |
187 | int regnum, enum lval_type *lval) | |
188 | { | |
189 | generic_get_saved_register (raw_buffer, optimized, addrp, fi, regnum, lval); | |
190 | } | |
191 | ||
192 | /* Function: xstormy16_type_is_scalar | |
193 | Makes the decision if a given type is a scalar types. Scalar | |
194 | types are returned in the registers r2-r7 as they fit. */ | |
195 | ||
196 | static int | |
197 | xstormy16_type_is_scalar (struct type *t) | |
198 | { | |
199 | return (TYPE_CODE(t) != TYPE_CODE_STRUCT | |
200 | && TYPE_CODE(t) != TYPE_CODE_UNION | |
201 | && TYPE_CODE(t) != TYPE_CODE_ARRAY); | |
202 | } | |
203 | ||
204 | /* Function: xstormy16_extract_return_value | |
205 | Copy the function's return value into VALBUF. | |
206 | This function is called only in the context of "target function calls", | |
207 | ie. when the debugger forces a function to be called in the child, and | |
208 | when the debugger forces a function to return prematurely via the | |
209 | "return" command. */ | |
210 | ||
211 | static void | |
212 | xstormy16_extract_return_value (struct type *type, char *regbuf, char *valbuf) | |
213 | { | |
214 | CORE_ADDR return_buffer; | |
215 | int offset = 0; | |
216 | ||
217 | if (xstormy16_type_is_scalar (type) | |
218 | && TYPE_LENGTH (type) <= E_MAX_RETTYPE_SIZE_IN_REGS) | |
219 | { | |
220 | /* Scalar return values of <= 12 bytes are returned in | |
221 | E_1ST_ARG_REGNUM to E_LST_ARG_REGNUM. */ | |
222 | memcpy (valbuf, | |
223 | ®buf[REGISTER_BYTE (E_1ST_ARG_REGNUM)] + offset, | |
224 | TYPE_LENGTH (type)); | |
225 | } | |
226 | else | |
227 | { | |
228 | /* Aggregates and return values > 12 bytes are returned in memory, | |
229 | pointed to by R2. */ | |
230 | return_buffer = | |
231 | extract_address (regbuf + REGISTER_BYTE (E_PTR_RET_REGNUM), | |
232 | REGISTER_RAW_SIZE (E_PTR_RET_REGNUM)); | |
233 | ||
234 | read_memory (return_buffer, valbuf, TYPE_LENGTH (type)); | |
235 | } | |
236 | } | |
237 | ||
238 | /* Function: xstormy16_push_arguments | |
239 | Setup the function arguments for GDB to call a function in the inferior. | |
240 | Called only in the context of a target function call from the debugger. | |
241 | Returns the value of the SP register after the args are pushed. | |
242 | */ | |
243 | ||
244 | static CORE_ADDR | |
245 | xstormy16_push_arguments (int nargs, struct value **args, CORE_ADDR sp, | |
246 | int struct_return, CORE_ADDR struct_addr) | |
247 | { | |
248 | CORE_ADDR stack_dest = sp; | |
249 | int argreg = E_1ST_ARG_REGNUM; | |
250 | int i, j; | |
251 | int typelen, slacklen; | |
252 | char *val; | |
253 | ||
254 | /* If struct_return is true, then the struct return address will | |
255 | consume one argument-passing register. */ | |
256 | if (struct_return) | |
257 | argreg++; | |
258 | ||
259 | /* Arguments are passed in R2-R7 as they fit. If an argument doesn't | |
260 | fit in the remaining registers we're switching over to the stack. | |
261 | No argument is put on stack partially and as soon as we switched | |
262 | over to stack no further argument is put in a register even if it | |
263 | would fit in the remaining unused registers. */ | |
264 | for (i = 0; i < nargs && argreg <= E_LST_ARG_REGNUM; i++) | |
265 | { | |
266 | typelen = TYPE_LENGTH (VALUE_ENCLOSING_TYPE (args[i])); | |
267 | if (typelen > E_MAX_RETTYPE_SIZE (argreg)) | |
268 | break; | |
269 | ||
270 | /* Put argument into registers wordwise. */ | |
271 | val = VALUE_CONTENTS (args[i]); | |
272 | for (j = 0; j < typelen; j += xstormy16_reg_size) | |
273 | write_register (argreg++, | |
274 | extract_unsigned_integer (val + j, | |
275 | typelen - j == | |
276 | 1 ? 1 : | |
277 | xstormy16_reg_size)); | |
278 | } | |
279 | ||
280 | /* Align SP */ | |
281 | if (stack_dest & 1) | |
282 | ++stack_dest; | |
283 | ||
284 | /* Loop backwards through remaining arguments and push them on the stack, | |
285 | wordaligned. */ | |
286 | for (j = nargs - 1; j >= i; j--) | |
287 | { | |
288 | typelen = TYPE_LENGTH (VALUE_ENCLOSING_TYPE (args[j])); | |
289 | slacklen = typelen & 1; | |
290 | val = alloca (typelen + slacklen); | |
291 | memcpy (val, VALUE_CONTENTS (args[j]), typelen); | |
292 | memset (val + typelen, 0, slacklen); | |
293 | ||
294 | /* Now write this data to the stack. The stack grows upwards. */ | |
295 | write_memory (stack_dest, val, typelen + slacklen); | |
296 | stack_dest += typelen + slacklen; | |
297 | } | |
298 | ||
299 | /* And that should do it. Return the new stack pointer. */ | |
300 | return stack_dest; | |
301 | } | |
302 | ||
303 | /* Function: xstormy16_push_return_address (pc) | |
304 | Setup the return address for GDB to call a function in the inferior. | |
305 | Called only in the context of a target function call from the debugger. | |
306 | Returns the value of the SP register when the operation is finished | |
307 | (which may or may not be the same as before). | |
308 | */ | |
309 | ||
310 | CORE_ADDR | |
311 | xstormy16_push_return_address (CORE_ADDR pc, CORE_ADDR sp) | |
312 | { | |
313 | unsigned char buf[xstormy16_pc_size]; | |
314 | ||
315 | store_unsigned_integer (buf, xstormy16_pc_size, CALL_DUMMY_ADDRESS ()); | |
316 | write_memory (sp, buf, xstormy16_pc_size); | |
317 | return sp + xstormy16_pc_size; | |
318 | } | |
319 | ||
320 | /* Function: xstormy16_pop_frame | |
321 | Destroy the innermost (Top-Of-Stack) stack frame, restoring the | |
322 | machine state that was in effect before the frame was created. | |
323 | Used in the contexts of the "return" command, and of | |
324 | target function calls from the debugger. | |
325 | */ | |
326 | ||
327 | static void | |
328 | xstormy16_pop_frame (void) | |
329 | { | |
330 | struct frame_info *fi = get_current_frame (); | |
331 | int i; | |
332 | ||
333 | if (fi == NULL) | |
334 | return; /* paranoia */ | |
335 | ||
336 | if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame)) | |
337 | { | |
338 | generic_pop_dummy_frame (); | |
339 | } | |
340 | else | |
341 | { | |
342 | /* Restore the saved regs. */ | |
343 | for (i = 0; i < NUM_REGS; i++) | |
344 | if (fi->saved_regs[i]) | |
345 | { | |
346 | if (i == SP_REGNUM) | |
347 | write_register (i, fi->saved_regs[i]); | |
348 | else if (i == E_PC_REGNUM) | |
349 | write_register (i, read_memory_integer (fi->saved_regs[i], | |
350 | xstormy16_pc_size)); | |
351 | else | |
352 | write_register (i, read_memory_integer (fi->saved_regs[i], | |
353 | xstormy16_reg_size)); | |
354 | } | |
355 | /* Restore the PC */ | |
356 | write_register (PC_REGNUM, FRAME_SAVED_PC (fi)); | |
357 | flush_cached_frames (); | |
358 | } | |
359 | return; | |
360 | } | |
361 | ||
362 | /* Function: xstormy16_store_struct_return | |
363 | Copy the (struct) function return value to its destined location. | |
364 | Called only in the context of a target function call from the debugger. | |
365 | */ | |
366 | ||
367 | static void | |
368 | xstormy16_store_struct_return (CORE_ADDR addr, CORE_ADDR sp) | |
369 | { | |
370 | write_register (E_PTR_RET_REGNUM, addr); | |
371 | } | |
372 | ||
373 | /* Function: xstormy16_store_return_value | |
374 | Copy the function return value from VALBUF into the | |
375 | proper location for a function return. | |
376 | Called only in the context of the "return" command. | |
377 | */ | |
378 | ||
379 | static void | |
380 | xstormy16_store_return_value (struct type *type, char *valbuf) | |
381 | { | |
382 | CORE_ADDR return_buffer; | |
383 | char buf[xstormy16_reg_size]; | |
384 | ||
385 | if (xstormy16_type_is_scalar (type) && TYPE_LENGTH (type) == 1) | |
386 | { | |
387 | /* Add leading zeros to the value. */ | |
388 | memset (buf, 0, xstormy16_reg_size); | |
389 | memcpy (buf, valbuf, 1); | |
390 | write_register_gen (E_1ST_ARG_REGNUM, buf); | |
391 | } | |
392 | else if (xstormy16_type_is_scalar (type) && | |
393 | TYPE_LENGTH (type) <= E_MAX_RETTYPE_SIZE_IN_REGS) | |
394 | write_register_bytes (REGISTER_BYTE (E_1ST_ARG_REGNUM), | |
395 | valbuf, TYPE_LENGTH (type)); | |
396 | else | |
397 | { | |
398 | return_buffer = read_register (E_PTR_RET_REGNUM); | |
399 | write_memory (return_buffer, valbuf, TYPE_LENGTH (type)); | |
400 | } | |
401 | } | |
402 | ||
403 | /* Function: xstormy16_extract_struct_value_address | |
404 | Returns the address in which a function should return a struct value. | |
405 | Used in the contexts of the "return" command, and of | |
406 | target function calls from the debugger. | |
407 | */ | |
408 | ||
409 | static CORE_ADDR | |
410 | xstormy16_extract_struct_value_address (char *regbuf) | |
411 | { | |
412 | return extract_address (regbuf + | |
413 | xstormy16_register_byte (E_PTR_RET_REGNUM), | |
414 | xstormy16_reg_size); | |
415 | } | |
416 | ||
417 | /* Function: xstormy16_use_struct_convention | |
418 | Returns non-zero if the given struct type will be returned using | |
419 | a special convention, rather than the normal function return method. | |
420 | 7sed in the contexts of the "return" command, and of | |
421 | target function calls from the debugger. | |
422 | */ | |
423 | ||
424 | static int | |
425 | xstormy16_use_struct_convention (int gcc_p, struct type *type) | |
426 | { | |
427 | return !xstormy16_type_is_scalar (type) | |
428 | || TYPE_LENGTH (type) > E_MAX_RETTYPE_SIZE_IN_REGS; | |
429 | } | |
430 | ||
431 | /* Function: frame_saved_register | |
432 | Returns the value that regnum had in frame fi | |
433 | (saved in fi or in one of its children). | |
434 | */ | |
435 | ||
436 | static CORE_ADDR | |
437 | xstormy16_frame_saved_register (struct frame_info *fi, int regnum) | |
438 | { | |
439 | int size = xstormy16_register_raw_size (regnum); | |
440 | char *buf = (char *) alloca (size); | |
441 | ||
442 | generic_get_saved_register (buf, NULL, NULL, fi, regnum, NULL); | |
443 | return (CORE_ADDR) extract_unsigned_integer (buf, size); | |
444 | } | |
445 | ||
446 | /* Function: xstormy16_scan_prologue | |
447 | Decode the instructions within the given address range. | |
448 | Decide when we must have reached the end of the function prologue. | |
449 | If a frame_info pointer is provided, fill in its saved_regs etc. | |
450 | ||
451 | Returns the address of the first instruction after the prologue. | |
452 | */ | |
453 | ||
454 | static CORE_ADDR | |
211a4f69 CV |
455 | xstormy16_scan_prologue (CORE_ADDR start_addr, CORE_ADDR end_addr, |
456 | struct frame_info *fi, int *frameless) | |
0c884e17 CV |
457 | { |
458 | CORE_ADDR sp = 0, fp = 0; | |
459 | CORE_ADDR next_addr; | |
460 | ULONGEST inst, inst2; | |
461 | LONGEST offset; | |
462 | int regnum; | |
463 | ||
211a4f69 CV |
464 | if (frameless) |
465 | *frameless = 1; | |
0c884e17 CV |
466 | if (fi) |
467 | { | |
468 | /* In a call dummy, don't touch the frame. */ | |
469 | if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame)) | |
470 | return start_addr; | |
471 | ||
472 | /* Grab the frame-relative values of SP and FP, needed below. | |
473 | The frame_saved_register function will find them on the | |
474 | stack or in the registers as appropriate. */ | |
475 | sp = xstormy16_frame_saved_register (fi, E_SP_REGNUM); | |
476 | fp = xstormy16_frame_saved_register (fi, E_FP_REGNUM); | |
477 | ||
478 | /* Initialize framesize with size of PC put on stack by CALLF inst. */ | |
479 | fi->extra_info->framesize = xstormy16_pc_size; | |
480 | } | |
481 | for (next_addr = start_addr; | |
482 | next_addr < end_addr; next_addr += xstormy16_inst_size) | |
483 | { | |
484 | inst = read_memory_unsigned_integer (next_addr, xstormy16_inst_size); | |
485 | inst2 = read_memory_unsigned_integer (next_addr + xstormy16_inst_size, | |
486 | xstormy16_inst_size); | |
487 | ||
488 | if (inst >= 0x0082 && inst <= 0x008d) /* push r2 .. push r13 */ | |
489 | { | |
490 | if (fi) | |
491 | { | |
492 | regnum = inst & 0x000f; | |
493 | fi->saved_regs[regnum] = fi->extra_info->framesize; | |
494 | fi->extra_info->framesize += xstormy16_reg_size; | |
495 | } | |
496 | } | |
497 | ||
498 | /* optional stack allocation for args and local vars <= 4 byte */ | |
499 | else if (inst == 0x301f || inst == 0x303f) /* inc r15, #0x1/#0x3 */ | |
500 | { | |
501 | if (fi) /* Record the frame size. */ | |
502 | fi->extra_info->framesize += ((inst & 0x0030) >> 4) + 1; | |
503 | } | |
504 | ||
505 | /* optional stack allocation for args and local vars > 4 && < 16 byte */ | |
506 | else if ((inst & 0xff0f) == 0x510f) /* 51Hf add r15, #0xH */ | |
507 | { | |
508 | if (fi) /* Record the frame size. */ | |
509 | fi->extra_info->framesize += (inst & 0x00f0) >> 4; | |
510 | } | |
511 | ||
512 | /* optional stack allocation for args and local vars >= 16 byte */ | |
513 | else if (inst == 0x314f && inst2 >= 0x0010) /* 314f HHHH add r15, #0xH */ | |
514 | { | |
515 | if (fi) /* Record the frame size. */ | |
516 | fi->extra_info->framesize += inst2; | |
517 | next_addr += xstormy16_inst_size; | |
518 | } | |
519 | ||
520 | else if (inst == 0x46fd) /* mov r13, r15 */ | |
521 | { | |
522 | if (fi) /* Record that the frame pointer is in use. */ | |
523 | fi->extra_info->frameless_p = 0; | |
211a4f69 CV |
524 | if (frameless) |
525 | *frameless = 0; | |
0c884e17 CV |
526 | } |
527 | ||
528 | /* optional copying of args in r2-r7 to r10-r13 */ | |
529 | /* Probably only in optimized case but legal action for prologue */ | |
530 | else if ((inst & 0xff00) == 0x4600 /* 46SD mov rD, rS */ | |
531 | && (inst & 0x00f0) >= 0x0020 && (inst & 0x00f0) <= 0x0070 | |
532 | && (inst & 0x000f) >= 0x00a0 && (inst & 0x000f) <= 0x000d) | |
533 | ; | |
534 | ||
535 | /* optional copying of args in r2-r7 to stack */ | |
536 | /* 72DS HHHH mov.b (rD, 0xHHHH), r(S-8) (bit3 always 1, bit2-0 = reg) */ | |
537 | /* 73DS HHHH mov.w (rD, 0xHHHH), r(S-8) */ | |
538 | else if ((inst & 0xfed8) == 0x72d8 && (inst & 0x0007) >= 2) | |
539 | { | |
540 | if (fi) | |
541 | { | |
542 | regnum = inst & 0x0007; | |
543 | /* Only 12 of 16 bits of the argument are used for the | |
544 | signed offset. */ | |
545 | offset = (LONGEST) (inst2 & 0x0fff); | |
546 | if (offset & 0x0800) | |
547 | offset -= 0x1000; | |
548 | ||
549 | fi->saved_regs[regnum] = fi->extra_info->framesize + offset; | |
550 | } | |
551 | next_addr += xstormy16_inst_size; | |
552 | } | |
553 | ||
554 | #if 0 | |
555 | /* 2001-08-10: Not part of the prologue anymore due to change in | |
556 | ABI. r8 and r9 are not used for argument passing anymore. */ | |
557 | ||
558 | /* optional copying of r8, r9 to stack */ | |
559 | /* 46S7; 73Df HHHH mov.w r7,rS; mov.w (rD, 0xHHHH), r7 D=8,9; S=13,15 */ | |
560 | /* 46S7; 72df HHHH mov.w r7,rS; mov.b (rD, 0xHHHH), r7 D=8,9; S=13,15 */ | |
561 | else if ((inst & 0xffef) == 0x4687 && (inst2 & 0xfedf) == 0x72df) | |
562 | { | |
563 | next_addr += xstormy16_inst_size; | |
564 | if (fi) | |
565 | { | |
566 | regnum = (inst & 0x00f0) >> 4; | |
567 | inst = inst2; | |
568 | inst2 = read_memory_unsigned_integer (next_addr | |
569 | + xstormy16_inst_size, | |
570 | xstormy16_inst_size); | |
571 | /* Only 12 of 16 bits of the argument are used for the | |
572 | signed offset. */ | |
573 | offset = (LONGEST) (inst2 & 0x0fff); | |
574 | if (offset & 0x0800) | |
575 | offset -= 0x1000; | |
576 | ||
577 | fi->saved_regs[regnum] = fi->extra_info->framesize + offset; | |
578 | } | |
579 | next_addr += xstormy16_inst_size; | |
580 | } | |
581 | #endif | |
582 | ||
583 | else /* Not a prologue instruction. */ | |
584 | break; | |
585 | } | |
586 | ||
587 | if (fi) | |
588 | { | |
589 | /* Special handling for the "saved" address of the SP: | |
590 | The SP is of course never saved on the stack at all, so | |
591 | by convention what we put here is simply the previous | |
592 | _value_ of the SP (as opposed to an address where the | |
593 | previous value would have been pushed). */ | |
594 | if (fi->extra_info->frameless_p) | |
595 | { | |
596 | fi->saved_regs[E_SP_REGNUM] = sp - fi->extra_info->framesize; | |
597 | fi->frame = sp; | |
598 | } | |
599 | else | |
600 | { | |
601 | fi->saved_regs[E_SP_REGNUM] = fp - fi->extra_info->framesize; | |
602 | fi->frame = fp; | |
603 | } | |
604 | ||
605 | /* So far only offsets to the beginning of the frame are | |
606 | saved in the saved_regs. Now we now the relation between | |
607 | sp, fp and framesize. We know the beginning of the frame | |
608 | so we can translate the register offsets to real addresses. */ | |
609 | for (regnum = 0; regnum < E_SP_REGNUM; ++regnum) | |
610 | if (fi->saved_regs[regnum]) | |
611 | fi->saved_regs[regnum] += fi->saved_regs[E_SP_REGNUM]; | |
612 | ||
613 | /* Save address of PC on stack. */ | |
614 | fi->saved_regs[E_PC_REGNUM] = fi->saved_regs[E_SP_REGNUM]; | |
615 | } | |
616 | ||
617 | return next_addr; | |
618 | } | |
619 | ||
620 | /* Function: xstormy16_skip_prologue | |
621 | If the input address is in a function prologue, | |
622 | returns the address of the end of the prologue; | |
623 | else returns the input address. | |
624 | ||
625 | Note: the input address is likely to be the function start, | |
626 | since this function is mainly used for advancing a breakpoint | |
627 | to the first line, or stepping to the first line when we have | |
628 | stepped into a function call. */ | |
629 | ||
630 | static CORE_ADDR | |
631 | xstormy16_skip_prologue (CORE_ADDR pc) | |
632 | { | |
633 | CORE_ADDR func_addr = 0, func_end = 0; | |
634 | char *func_name; | |
635 | ||
636 | if (find_pc_partial_function (pc, &func_name, &func_addr, &func_end)) | |
637 | { | |
638 | struct symtab_and_line sal; | |
639 | struct symbol *sym; | |
640 | ||
211a4f69 CV |
641 | /* Don't trust line number debug info in frameless functions. */ |
642 | int frameless = 1; | |
643 | CORE_ADDR plg_end = xstormy16_scan_prologue (func_addr, func_end, | |
644 | NULL, &frameless); | |
645 | if (frameless) | |
646 | return plg_end; | |
647 | ||
0c884e17 CV |
648 | /* Found a function. */ |
649 | sym = lookup_symbol (func_name, NULL, VAR_NAMESPACE, NULL, NULL); | |
211a4f69 | 650 | /* Don't use line number debug info for assembly source files. */ |
0c884e17 CV |
651 | if (sym && SYMBOL_LANGUAGE (sym) != language_asm) |
652 | { | |
0c884e17 CV |
653 | sal = find_pc_line (func_addr, 0); |
654 | if (sal.end && sal.end < func_end) | |
655 | { | |
656 | /* Found a line number, use it as end of prologue. */ | |
657 | return sal.end; | |
658 | } | |
659 | } | |
211a4f69 CV |
660 | /* No useable line symbol. Use result of prologue parsing method. */ |
661 | return plg_end; | |
0c884e17 CV |
662 | } |
663 | ||
664 | /* No function symbol -- just return the PC. */ | |
665 | ||
666 | return (CORE_ADDR) pc; | |
667 | } | |
668 | ||
669 | /* The epilogue is defined here as the area at the end of a function, | |
670 | either on the `ret' instruction itself or after an instruction which | |
671 | destroys the function's stack frame. */ | |
672 | static int | |
673 | xstormy16_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) | |
674 | { | |
675 | CORE_ADDR addr, func_addr = 0, func_end = 0; | |
676 | ||
677 | if (find_pc_partial_function (pc, NULL, &func_addr, &func_end)) | |
678 | { | |
679 | ULONGEST inst, inst2; | |
680 | CORE_ADDR addr = func_end - xstormy16_inst_size; | |
681 | ||
682 | /* The Xstormy16 epilogue is max. 14 bytes long. */ | |
683 | if (pc < func_end - 7 * xstormy16_inst_size) | |
684 | return 0; | |
685 | ||
686 | /* Check if we're on a `ret' instruction. Otherwise it's | |
687 | too dangerous to proceed. */ | |
688 | inst = read_memory_unsigned_integer (addr, xstormy16_inst_size); | |
689 | if (inst != 0x0003) | |
690 | return 0; | |
691 | ||
692 | while ((addr -= xstormy16_inst_size) >= func_addr) | |
693 | { | |
694 | inst = read_memory_unsigned_integer (addr, xstormy16_inst_size); | |
695 | if (inst >= 0x009a && inst <= 0x009d) /* pop r10...r13 */ | |
696 | continue; | |
697 | if (inst == 0x305f || inst == 0x307f) /* dec r15, #0x1/#0x3 */ | |
698 | break; | |
699 | inst2 = read_memory_unsigned_integer (addr - xstormy16_inst_size, | |
700 | xstormy16_inst_size); | |
701 | if (inst2 == 0x314f && inst >= 0x8000) /* add r15, neg. value */ | |
702 | { | |
703 | addr -= xstormy16_inst_size; | |
704 | break; | |
705 | } | |
706 | return 0; | |
707 | } | |
708 | if (pc > addr) | |
709 | return 1; | |
710 | } | |
711 | return 0; | |
712 | } | |
713 | ||
714 | /* Function: xstormy16_frame_init_saved_regs | |
715 | Set up the 'saved_regs' array. | |
716 | This is a data structure containing the addresses on the stack | |
717 | where each register has been saved, for each stack frame. | |
718 | Registers that have not been saved will have zero here. | |
719 | The stack register is special: rather than the address where the | |
720 | stack register has been saved, saved_regs[SP_REGNUM] will have the | |
721 | actual value of the previous frame's stack register. | |
722 | ||
723 | This function may be called in any context where the saved register | |
724 | values may be needed (backtrace, frame_info, get_saved_register). | |
725 | On many targets, it is called directly by init_extra_frame_info, | |
726 | in part because the information may be needed immediately by | |
727 | frame_chain. | |
728 | */ | |
729 | ||
730 | static void | |
731 | xstormy16_frame_init_saved_regs (struct frame_info *fi) | |
732 | { | |
733 | CORE_ADDR func_addr, func_end; | |
734 | ||
735 | if (!fi->saved_regs) | |
736 | { | |
737 | frame_saved_regs_zalloc (fi); | |
738 | ||
739 | /* Find the beginning of this function, so we can analyze its | |
740 | prologue. */ | |
741 | if (find_pc_partial_function (fi->pc, NULL, &func_addr, &func_end)) | |
211a4f69 | 742 | xstormy16_scan_prologue (func_addr, fi->pc, fi, NULL); |
0c884e17 CV |
743 | /* Else we're out of luck (can't debug completely stripped code). |
744 | FIXME. */ | |
745 | } | |
746 | } | |
747 | ||
748 | /* Function: xstormy16_frame_saved_pc | |
749 | Returns the return address for the selected frame. | |
750 | Called by frame_info, frame_chain_valid, and sometimes by | |
751 | get_prev_frame. | |
752 | */ | |
753 | ||
754 | static CORE_ADDR | |
755 | xstormy16_frame_saved_pc (struct frame_info *fi) | |
756 | { | |
757 | CORE_ADDR saved_pc; | |
758 | ||
759 | if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame)) | |
760 | { | |
761 | saved_pc = generic_read_register_dummy (fi->pc, fi->frame, E_PC_REGNUM); | |
762 | } | |
763 | else | |
764 | { | |
765 | saved_pc = read_memory_unsigned_integer (fi->saved_regs[E_PC_REGNUM], | |
766 | xstormy16_pc_size); | |
767 | } | |
768 | ||
769 | return saved_pc; | |
770 | } | |
771 | ||
772 | /* Function: xstormy16_init_extra_frame_info | |
773 | This is the constructor function for the frame_info struct, | |
774 | called whenever a new frame_info is created (from create_new_frame, | |
775 | and from get_prev_frame). | |
776 | */ | |
777 | ||
778 | static void | |
779 | xstormy16_init_extra_frame_info (int fromleaf, struct frame_info *fi) | |
780 | { | |
781 | if (!fi->extra_info) | |
782 | { | |
783 | fi->extra_info = (struct frame_extra_info *) | |
784 | frame_obstack_alloc (sizeof (struct frame_extra_info)); | |
785 | fi->extra_info->framesize = 0; | |
786 | fi->extra_info->frameless_p = 1; /* Default frameless, detect framed */ | |
787 | ||
788 | /* By default, the fi->frame is set to the value of the FP reg by gdb. | |
789 | This may not always be right; we may be in a frameless function, | |
790 | or we may be in the prologue, before the FP has been set up. | |
791 | Unfortunately, we can't make this determination without first | |
792 | calling scan_prologue, and we can't do that unles we know the | |
793 | fi->pc. */ | |
794 | ||
795 | if (!fi->pc) | |
796 | { | |
797 | /* Sometimes we are called from get_prev_frame without | |
798 | the PC being set up first. Long history, don't ask. | |
799 | Fortunately this will never happen from the outermost | |
800 | frame, so we should be able to get the saved pc from | |
801 | the next frame. */ | |
802 | if (fi->next) | |
803 | fi->pc = xstormy16_frame_saved_pc (fi->next); | |
804 | } | |
805 | ||
806 | /* Take care of the saved_regs right here (non-lazy). */ | |
807 | xstormy16_frame_init_saved_regs (fi); | |
808 | } | |
809 | } | |
810 | ||
811 | /* Function: xstormy16_frame_chain | |
812 | Returns a pointer to the stack frame of the calling function. | |
813 | Called only from get_prev_frame. Needed for backtrace, "up", etc. | |
814 | */ | |
815 | ||
816 | static CORE_ADDR | |
817 | xstormy16_frame_chain (struct frame_info *fi) | |
818 | { | |
819 | if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame)) | |
820 | { | |
821 | /* Call dummy's frame is the same as caller's. */ | |
822 | return fi->frame; | |
823 | } | |
824 | else | |
825 | { | |
826 | /* Return computed offset from this frame's fp. */ | |
827 | return fi->frame - fi->extra_info->framesize; | |
828 | } | |
829 | } | |
830 | ||
831 | static int | |
832 | xstormy16_frame_chain_valid (CORE_ADDR chain, struct frame_info *thisframe) | |
833 | { | |
834 | return chain < 0x8000 && FRAME_SAVED_PC (thisframe) >= 0x8000 && | |
835 | (thisframe->extra_info->frameless_p || | |
836 | thisframe->frame - thisframe->extra_info->framesize == chain); | |
837 | } | |
838 | ||
839 | /* Function: xstormy16_saved_pc_after_call | |
840 | Returns the previous PC immediately after a function call. | |
841 | This function is meant to bypass the regular get_saved_register | |
842 | mechanism, ie. it is meant to work even if the frame isn't complete. | |
843 | Called by step_over_function, and sometimes by get_prev_frame. | |
844 | */ | |
845 | ||
846 | static CORE_ADDR | |
847 | xstormy16_saved_pc_after_call (struct frame_info *ignore) | |
848 | { | |
849 | CORE_ADDR sp, pc, tmp; | |
850 | ||
851 | sp = read_register (E_SP_REGNUM) - xstormy16_pc_size; | |
852 | pc = read_memory_integer (sp, xstormy16_pc_size); | |
853 | ||
854 | /* Skip over jump table entry if necessary. */ | |
855 | if ((tmp = SKIP_TRAMPOLINE_CODE (pc))) | |
856 | pc = tmp; | |
857 | ||
858 | return pc; | |
859 | } | |
860 | ||
f4f9705a | 861 | const static unsigned char * |
0c884e17 CV |
862 | xstormy16_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr) |
863 | { | |
864 | static unsigned char breakpoint[] = { 0x06, 0x0 }; | |
865 | *lenptr = sizeof (breakpoint); | |
866 | return breakpoint; | |
867 | } | |
868 | ||
869 | /* Given a pointer to a jump table entry, return the address | |
870 | of the function it jumps to. Return 0 if not found. */ | |
871 | static CORE_ADDR | |
872 | xstormy16_resolve_jmp_table_entry (CORE_ADDR faddr) | |
873 | { | |
874 | struct obj_section *faddr_sect = find_pc_section (faddr); | |
875 | ||
876 | if (faddr_sect) | |
877 | { | |
878 | LONGEST inst, inst2, addr; | |
879 | char buf[2 * xstormy16_inst_size]; | |
880 | ||
881 | /* Return faddr if it's not pointing into the jump table. */ | |
882 | if (strcmp (faddr_sect->the_bfd_section->name, ".plt")) | |
883 | return faddr; | |
884 | ||
885 | if (!target_read_memory (faddr, buf, sizeof buf)) | |
886 | { | |
887 | inst = extract_unsigned_integer (buf, xstormy16_inst_size); | |
888 | inst2 = extract_unsigned_integer (buf + xstormy16_inst_size, | |
889 | xstormy16_inst_size); | |
890 | addr = inst2 << 8 | (inst & 0xff); | |
891 | return addr; | |
892 | } | |
893 | } | |
894 | return 0; | |
895 | } | |
896 | ||
897 | /* Given a function's address, attempt to find (and return) the | |
898 | address of the corresponding jump table entry. Return 0 if | |
899 | not found. */ | |
900 | static CORE_ADDR | |
901 | xstormy16_find_jmp_table_entry (CORE_ADDR faddr) | |
902 | { | |
903 | struct obj_section *faddr_sect = find_pc_section (faddr); | |
904 | ||
905 | if (faddr_sect) | |
906 | { | |
907 | struct obj_section *osect; | |
908 | ||
909 | /* Return faddr if it's already a pointer to a jump table entry. */ | |
910 | if (!strcmp (faddr_sect->the_bfd_section->name, ".plt")) | |
911 | return faddr; | |
912 | ||
913 | ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect) | |
914 | { | |
915 | if (!strcmp (osect->the_bfd_section->name, ".plt")) | |
916 | break; | |
917 | } | |
918 | ||
919 | if (osect < faddr_sect->objfile->sections_end) | |
920 | { | |
921 | CORE_ADDR addr; | |
922 | for (addr = osect->addr; | |
923 | addr < osect->endaddr; addr += 2 * xstormy16_inst_size) | |
924 | { | |
925 | int status; | |
926 | LONGEST inst, inst2, faddr2; | |
927 | char buf[2 * xstormy16_inst_size]; | |
928 | ||
929 | if (target_read_memory (addr, buf, sizeof buf)) | |
930 | return 0; | |
931 | inst = extract_unsigned_integer (buf, xstormy16_inst_size); | |
932 | inst2 = extract_unsigned_integer (buf + xstormy16_inst_size, | |
933 | xstormy16_inst_size); | |
934 | faddr2 = inst2 << 8 | (inst & 0xff); | |
935 | if (faddr == faddr2) | |
936 | return addr; | |
937 | } | |
938 | } | |
939 | } | |
940 | return 0; | |
941 | } | |
942 | ||
943 | static CORE_ADDR | |
944 | xstormy16_skip_trampoline_code (CORE_ADDR pc) | |
945 | { | |
946 | int tmp = xstormy16_resolve_jmp_table_entry (pc); | |
947 | ||
948 | if (tmp && tmp != pc) | |
949 | return tmp; | |
950 | return 0; | |
951 | } | |
952 | ||
953 | static int | |
954 | xstormy16_in_solib_call_trampoline (CORE_ADDR pc, char *name) | |
955 | { | |
956 | return xstormy16_skip_trampoline_code (pc) != 0; | |
957 | } | |
958 | ||
959 | static CORE_ADDR | |
960 | xstormy16_pointer_to_address (struct type *type, void *buf) | |
961 | { | |
962 | enum type_code target = TYPE_CODE (TYPE_TARGET_TYPE (type)); | |
963 | CORE_ADDR addr = extract_address (buf, TYPE_LENGTH (type)); | |
964 | ||
965 | if (target == TYPE_CODE_FUNC || target == TYPE_CODE_METHOD) | |
966 | { | |
967 | CORE_ADDR addr2 = xstormy16_resolve_jmp_table_entry (addr); | |
968 | if (addr2) | |
969 | addr = addr2; | |
970 | } | |
971 | ||
972 | return addr; | |
973 | } | |
974 | ||
975 | static void | |
976 | xstormy16_address_to_pointer (struct type *type, void *buf, CORE_ADDR addr) | |
977 | { | |
978 | enum type_code target = TYPE_CODE (TYPE_TARGET_TYPE (type)); | |
979 | ||
980 | if (target == TYPE_CODE_FUNC || target == TYPE_CODE_METHOD) | |
981 | { | |
982 | CORE_ADDR addr2 = xstormy16_find_jmp_table_entry (addr); | |
983 | if (addr2) | |
984 | addr = addr2; | |
985 | } | |
986 | store_address (buf, TYPE_LENGTH (type), addr); | |
987 | } | |
988 | ||
989 | static CORE_ADDR | |
990 | xstormy16_stack_align (CORE_ADDR addr) | |
991 | { | |
992 | if (addr & 1) | |
993 | ++addr; | |
994 | return addr; | |
995 | } | |
996 | ||
997 | void | |
998 | xstormy16_save_dummy_frame_tos (CORE_ADDR sp) | |
999 | { | |
1000 | generic_save_dummy_frame_tos (sp - xstormy16_pc_size); | |
1001 | } | |
1002 | ||
1003 | /* Function: xstormy16_gdbarch_init | |
1004 | Initializer function for the xstormy16 gdbarch vector. | |
1005 | Called by gdbarch. Sets up the gdbarch vector(s) for this target. */ | |
1006 | ||
1007 | static struct gdbarch * | |
1008 | xstormy16_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) | |
1009 | { | |
1010 | static LONGEST call_dummy_words[1] = { 0 }; | |
1011 | struct gdbarch_tdep *tdep = NULL; | |
1012 | struct gdbarch *gdbarch; | |
1013 | ||
1014 | /* find a candidate among the list of pre-declared architectures. */ | |
1015 | arches = gdbarch_list_lookup_by_info (arches, &info); | |
1016 | if (arches != NULL) | |
1017 | return (arches->gdbarch); | |
1018 | ||
1019 | #if 0 | |
1020 | tdep = (struct gdbarch_tdep *) xmalloc (sizeof (struct gdbarch_tdep)); | |
1021 | #endif | |
1022 | ||
1023 | gdbarch = gdbarch_alloc (&info, 0); | |
1024 | ||
1025 | /* | |
1026 | * Basic register fields and methods. | |
1027 | */ | |
1028 | ||
1029 | set_gdbarch_num_regs (gdbarch, E_NUM_REGS); | |
1030 | set_gdbarch_num_pseudo_regs (gdbarch, 0); | |
1031 | set_gdbarch_sp_regnum (gdbarch, E_SP_REGNUM); | |
1032 | set_gdbarch_fp_regnum (gdbarch, E_FP_REGNUM); | |
1033 | set_gdbarch_pc_regnum (gdbarch, E_PC_REGNUM); | |
1034 | set_gdbarch_register_name (gdbarch, xstormy16_register_name); | |
1035 | set_gdbarch_register_size (gdbarch, xstormy16_reg_size); | |
1036 | set_gdbarch_register_bytes (gdbarch, E_ALL_REGS_SIZE); | |
1037 | set_gdbarch_register_byte (gdbarch, xstormy16_register_byte); | |
1038 | set_gdbarch_register_raw_size (gdbarch, xstormy16_register_raw_size); | |
1039 | set_gdbarch_max_register_raw_size (gdbarch, xstormy16_pc_size); | |
1040 | set_gdbarch_register_virtual_size (gdbarch, xstormy16_register_raw_size); | |
1041 | set_gdbarch_max_register_virtual_size (gdbarch, 4); | |
1042 | set_gdbarch_register_virtual_type (gdbarch, xstormy16_reg_virtual_type); | |
1043 | ||
1044 | /* | |
1045 | * Frame Info | |
1046 | */ | |
1047 | set_gdbarch_init_extra_frame_info (gdbarch, | |
1048 | xstormy16_init_extra_frame_info); | |
1049 | set_gdbarch_frame_init_saved_regs (gdbarch, | |
1050 | xstormy16_frame_init_saved_regs); | |
1051 | set_gdbarch_frame_chain (gdbarch, xstormy16_frame_chain); | |
1052 | set_gdbarch_get_saved_register (gdbarch, xstormy16_get_saved_register); | |
1053 | set_gdbarch_saved_pc_after_call (gdbarch, xstormy16_saved_pc_after_call); | |
1054 | set_gdbarch_frame_saved_pc (gdbarch, xstormy16_frame_saved_pc); | |
1055 | set_gdbarch_skip_prologue (gdbarch, xstormy16_skip_prologue); | |
1056 | set_gdbarch_frame_chain_valid (gdbarch, xstormy16_frame_chain_valid); | |
1057 | set_gdbarch_frame_args_address (gdbarch, default_frame_address); | |
1058 | set_gdbarch_frame_locals_address (gdbarch, default_frame_address); | |
1059 | ||
1060 | set_gdbarch_in_function_epilogue_p (gdbarch, | |
1061 | xstormy16_in_function_epilogue_p); | |
1062 | ||
1063 | /* | |
1064 | * Miscelany | |
1065 | */ | |
1066 | /* Stack grows up. */ | |
1067 | set_gdbarch_inner_than (gdbarch, core_addr_greaterthan); | |
1068 | /* PC stops zero byte after a trap instruction | |
1069 | (which means: exactly on trap instruction). */ | |
1070 | set_gdbarch_decr_pc_after_break (gdbarch, 0); | |
1071 | /* This value is almost never non-zero... */ | |
1072 | set_gdbarch_function_start_offset (gdbarch, 0); | |
1073 | /* This value is almost never non-zero... */ | |
1074 | set_gdbarch_frame_args_skip (gdbarch, 0); | |
1075 | /* OK to default this value to 'unknown'. */ | |
1076 | set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown); | |
1077 | ||
1078 | /* W/o prototype, coerce float args to double. */ | |
1079 | set_gdbarch_coerce_float_to_double (gdbarch, | |
1080 | standard_coerce_float_to_double); | |
1081 | ||
1082 | /* | |
1083 | * Call Dummies | |
1084 | * | |
1085 | * These values and methods are used when gdb calls a target function. */ | |
1086 | set_gdbarch_use_generic_dummy_frames (gdbarch, 1); | |
1087 | set_gdbarch_push_dummy_frame (gdbarch, generic_push_dummy_frame); | |
1088 | set_gdbarch_push_return_address (gdbarch, xstormy16_push_return_address); | |
26e9b323 | 1089 | set_gdbarch_deprecated_extract_return_value (gdbarch, xstormy16_extract_return_value); |
0c884e17 CV |
1090 | set_gdbarch_push_arguments (gdbarch, xstormy16_push_arguments); |
1091 | set_gdbarch_pop_frame (gdbarch, xstormy16_pop_frame); | |
1092 | set_gdbarch_store_struct_return (gdbarch, xstormy16_store_struct_return); | |
1093 | set_gdbarch_store_return_value (gdbarch, xstormy16_store_return_value); | |
26e9b323 | 1094 | set_gdbarch_deprecated_extract_struct_value_address (gdbarch, xstormy16_extract_struct_value_address); |
0c884e17 CV |
1095 | set_gdbarch_use_struct_convention (gdbarch, |
1096 | xstormy16_use_struct_convention); | |
1097 | set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT); | |
1098 | set_gdbarch_call_dummy_address (gdbarch, entry_point_address); | |
1099 | set_gdbarch_call_dummy_start_offset (gdbarch, 0); | |
1100 | set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 0); | |
1101 | set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1); | |
1102 | set_gdbarch_call_dummy_length (gdbarch, 0); | |
1103 | set_gdbarch_pc_in_call_dummy (gdbarch, generic_pc_in_call_dummy); | |
1104 | set_gdbarch_call_dummy_p (gdbarch, 1); | |
1105 | set_gdbarch_call_dummy_words (gdbarch, call_dummy_words); | |
1106 | set_gdbarch_sizeof_call_dummy_words (gdbarch, 0); | |
1107 | set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0); | |
1108 | /* set_gdbarch_call_dummy_stack_adjust */ | |
1109 | set_gdbarch_fix_call_dummy (gdbarch, generic_fix_call_dummy); | |
1110 | set_gdbarch_breakpoint_from_pc (gdbarch, xstormy16_breakpoint_from_pc); | |
1111 | ||
1112 | set_gdbarch_int_bit (gdbarch, 2 * TARGET_CHAR_BIT); | |
1113 | set_gdbarch_ptr_bit (gdbarch, 2 * TARGET_CHAR_BIT); | |
1114 | set_gdbarch_addr_bit (gdbarch, 4 * TARGET_CHAR_BIT); | |
1115 | set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT); | |
1116 | ||
1117 | set_gdbarch_address_to_pointer (gdbarch, xstormy16_address_to_pointer); | |
1118 | set_gdbarch_pointer_to_address (gdbarch, xstormy16_pointer_to_address); | |
1119 | ||
1120 | set_gdbarch_stack_align (gdbarch, xstormy16_stack_align); | |
1121 | set_gdbarch_extra_stack_alignment_needed (gdbarch, 0); | |
1122 | ||
1123 | set_gdbarch_save_dummy_frame_tos (gdbarch, xstormy16_save_dummy_frame_tos); | |
1124 | ||
1125 | set_gdbarch_skip_trampoline_code (gdbarch, xstormy16_skip_trampoline_code); | |
1126 | ||
1127 | set_gdbarch_in_solib_call_trampoline (gdbarch, | |
1128 | xstormy16_in_solib_call_trampoline); | |
1129 | ||
1130 | return gdbarch; | |
1131 | } | |
1132 | ||
1133 | /* Function: _initialize_xstormy16_tdep | |
1134 | Initializer function for the Sanyo Xstormy16a module. | |
1135 | Called by gdb at start-up. */ | |
1136 | ||
1137 | void | |
1138 | _initialize_xstormy16_tdep (void) | |
1139 | { | |
1140 | extern int print_insn_xstormy16 (); | |
1141 | ||
1142 | register_gdbarch_init (bfd_arch_xstormy16, xstormy16_gdbarch_init); | |
1143 | tm_print_insn = print_insn_xstormy16; | |
1144 | } |