Commit | Line | Data |
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0c884e17 | 1 | /* Target-dependent code for the Sanyo Xstormy16a (LC590000) processor. |
f4f9705a | 2 | |
07be497a | 3 | Copyright 2001, 2002, 2003, 2004 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" | |
0c884e17 CV |
25 | #include "arch-utils.h" |
26 | #include "regcache.h" | |
27 | #include "gdbcore.h" | |
28 | #include "objfiles.h" | |
a89aa300 | 29 | #include "dis-asm.h" |
0c884e17 CV |
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 | ||
fa88f677 | 100 | static const char * |
0c884e17 CV |
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 | ||
0c884e17 CV |
153 | /* Function: xstormy16_reg_virtual_type |
154 | Returns the default type for register N. */ | |
155 | ||
156 | static struct type * | |
157 | xstormy16_reg_virtual_type (int regnum) | |
158 | { | |
159 | if (regnum < 0 || regnum >= E_NUM_REGS) | |
160 | internal_error (__FILE__, __LINE__, | |
161 | "xstormy16_register_virtual_type: illegal register number %d", | |
162 | regnum); | |
163 | else if (regnum == E_PC_REGNUM) | |
164 | return builtin_type_uint32; | |
165 | else | |
166 | return builtin_type_uint16; | |
167 | } | |
168 | ||
169 | /* Function: xstormy16_get_saved_register | |
170 | Find a register's saved value on the call stack. */ | |
171 | ||
172 | static void | |
173 | xstormy16_get_saved_register (char *raw_buffer, | |
174 | int *optimized, | |
175 | CORE_ADDR *addrp, | |
176 | struct frame_info *fi, | |
177 | int regnum, enum lval_type *lval) | |
178 | { | |
bdcdd535 | 179 | deprecated_generic_get_saved_register (raw_buffer, optimized, addrp, fi, regnum, lval); |
0c884e17 CV |
180 | } |
181 | ||
182 | /* Function: xstormy16_type_is_scalar | |
183 | Makes the decision if a given type is a scalar types. Scalar | |
184 | types are returned in the registers r2-r7 as they fit. */ | |
185 | ||
186 | static int | |
187 | xstormy16_type_is_scalar (struct type *t) | |
188 | { | |
189 | return (TYPE_CODE(t) != TYPE_CODE_STRUCT | |
190 | && TYPE_CODE(t) != TYPE_CODE_UNION | |
191 | && TYPE_CODE(t) != TYPE_CODE_ARRAY); | |
192 | } | |
193 | ||
194 | /* Function: xstormy16_extract_return_value | |
195 | Copy the function's return value into VALBUF. | |
196 | This function is called only in the context of "target function calls", | |
197 | ie. when the debugger forces a function to be called in the child, and | |
198 | when the debugger forces a function to return prematurely via the | |
199 | "return" command. */ | |
200 | ||
201 | static void | |
202 | xstormy16_extract_return_value (struct type *type, char *regbuf, char *valbuf) | |
203 | { | |
204 | CORE_ADDR return_buffer; | |
205 | int offset = 0; | |
206 | ||
207 | if (xstormy16_type_is_scalar (type) | |
208 | && TYPE_LENGTH (type) <= E_MAX_RETTYPE_SIZE_IN_REGS) | |
209 | { | |
210 | /* Scalar return values of <= 12 bytes are returned in | |
211 | E_1ST_ARG_REGNUM to E_LST_ARG_REGNUM. */ | |
212 | memcpy (valbuf, | |
62700349 | 213 | ®buf[DEPRECATED_REGISTER_BYTE (E_1ST_ARG_REGNUM)] + offset, |
0c884e17 CV |
214 | TYPE_LENGTH (type)); |
215 | } | |
216 | else | |
217 | { | |
218 | /* Aggregates and return values > 12 bytes are returned in memory, | |
219 | pointed to by R2. */ | |
220 | return_buffer = | |
62700349 | 221 | extract_unsigned_integer (regbuf + DEPRECATED_REGISTER_BYTE (E_PTR_RET_REGNUM), |
12c266ea | 222 | DEPRECATED_REGISTER_RAW_SIZE (E_PTR_RET_REGNUM)); |
0c884e17 CV |
223 | |
224 | read_memory (return_buffer, valbuf, TYPE_LENGTH (type)); | |
225 | } | |
226 | } | |
227 | ||
228 | /* Function: xstormy16_push_arguments | |
229 | Setup the function arguments for GDB to call a function in the inferior. | |
230 | Called only in the context of a target function call from the debugger. | |
231 | Returns the value of the SP register after the args are pushed. | |
232 | */ | |
233 | ||
234 | static CORE_ADDR | |
235 | xstormy16_push_arguments (int nargs, struct value **args, CORE_ADDR sp, | |
236 | int struct_return, CORE_ADDR struct_addr) | |
237 | { | |
238 | CORE_ADDR stack_dest = sp; | |
239 | int argreg = E_1ST_ARG_REGNUM; | |
240 | int i, j; | |
241 | int typelen, slacklen; | |
242 | char *val; | |
243 | ||
244 | /* If struct_return is true, then the struct return address will | |
245 | consume one argument-passing register. */ | |
246 | if (struct_return) | |
247 | argreg++; | |
248 | ||
249 | /* Arguments are passed in R2-R7 as they fit. If an argument doesn't | |
250 | fit in the remaining registers we're switching over to the stack. | |
251 | No argument is put on stack partially and as soon as we switched | |
252 | over to stack no further argument is put in a register even if it | |
253 | would fit in the remaining unused registers. */ | |
254 | for (i = 0; i < nargs && argreg <= E_LST_ARG_REGNUM; i++) | |
255 | { | |
256 | typelen = TYPE_LENGTH (VALUE_ENCLOSING_TYPE (args[i])); | |
257 | if (typelen > E_MAX_RETTYPE_SIZE (argreg)) | |
258 | break; | |
259 | ||
260 | /* Put argument into registers wordwise. */ | |
261 | val = VALUE_CONTENTS (args[i]); | |
262 | for (j = 0; j < typelen; j += xstormy16_reg_size) | |
263 | write_register (argreg++, | |
264 | extract_unsigned_integer (val + j, | |
265 | typelen - j == | |
266 | 1 ? 1 : | |
267 | xstormy16_reg_size)); | |
268 | } | |
269 | ||
270 | /* Align SP */ | |
271 | if (stack_dest & 1) | |
272 | ++stack_dest; | |
273 | ||
274 | /* Loop backwards through remaining arguments and push them on the stack, | |
275 | wordaligned. */ | |
276 | for (j = nargs - 1; j >= i; j--) | |
277 | { | |
278 | typelen = TYPE_LENGTH (VALUE_ENCLOSING_TYPE (args[j])); | |
279 | slacklen = typelen & 1; | |
280 | val = alloca (typelen + slacklen); | |
281 | memcpy (val, VALUE_CONTENTS (args[j]), typelen); | |
282 | memset (val + typelen, 0, slacklen); | |
283 | ||
284 | /* Now write this data to the stack. The stack grows upwards. */ | |
285 | write_memory (stack_dest, val, typelen + slacklen); | |
286 | stack_dest += typelen + slacklen; | |
287 | } | |
288 | ||
289 | /* And that should do it. Return the new stack pointer. */ | |
290 | return stack_dest; | |
291 | } | |
292 | ||
293 | /* Function: xstormy16_push_return_address (pc) | |
294 | Setup the return address for GDB to call a function in the inferior. | |
295 | Called only in the context of a target function call from the debugger. | |
296 | Returns the value of the SP register when the operation is finished | |
297 | (which may or may not be the same as before). | |
298 | */ | |
299 | ||
a78f21af | 300 | static CORE_ADDR |
0c884e17 CV |
301 | xstormy16_push_return_address (CORE_ADDR pc, CORE_ADDR sp) |
302 | { | |
303 | unsigned char buf[xstormy16_pc_size]; | |
304 | ||
88a82a65 | 305 | store_unsigned_integer (buf, xstormy16_pc_size, entry_point_address ()); |
0c884e17 CV |
306 | write_memory (sp, buf, xstormy16_pc_size); |
307 | return sp + xstormy16_pc_size; | |
308 | } | |
309 | ||
310 | /* Function: xstormy16_pop_frame | |
311 | Destroy the innermost (Top-Of-Stack) stack frame, restoring the | |
312 | machine state that was in effect before the frame was created. | |
313 | Used in the contexts of the "return" command, and of | |
314 | target function calls from the debugger. | |
315 | */ | |
316 | ||
317 | static void | |
318 | xstormy16_pop_frame (void) | |
319 | { | |
320 | struct frame_info *fi = get_current_frame (); | |
321 | int i; | |
322 | ||
323 | if (fi == NULL) | |
324 | return; /* paranoia */ | |
325 | ||
1e2330ba AC |
326 | if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (fi), get_frame_base (fi), |
327 | get_frame_base (fi))) | |
0c884e17 CV |
328 | { |
329 | generic_pop_dummy_frame (); | |
330 | } | |
331 | else | |
332 | { | |
333 | /* Restore the saved regs. */ | |
334 | for (i = 0; i < NUM_REGS; i++) | |
1b1d3794 | 335 | if (deprecated_get_frame_saved_regs (fi)[i]) |
0c884e17 CV |
336 | { |
337 | if (i == SP_REGNUM) | |
1b1d3794 | 338 | write_register (i, deprecated_get_frame_saved_regs (fi)[i]); |
0c884e17 | 339 | else if (i == E_PC_REGNUM) |
1b1d3794 | 340 | write_register (i, read_memory_integer (deprecated_get_frame_saved_regs (fi)[i], |
0c884e17 CV |
341 | xstormy16_pc_size)); |
342 | else | |
1b1d3794 | 343 | write_register (i, read_memory_integer (deprecated_get_frame_saved_regs (fi)[i], |
0c884e17 CV |
344 | xstormy16_reg_size)); |
345 | } | |
346 | /* Restore the PC */ | |
8bedc050 | 347 | write_register (PC_REGNUM, DEPRECATED_FRAME_SAVED_PC (fi)); |
0c884e17 CV |
348 | flush_cached_frames (); |
349 | } | |
350 | return; | |
351 | } | |
352 | ||
353 | /* Function: xstormy16_store_struct_return | |
354 | Copy the (struct) function return value to its destined location. | |
355 | Called only in the context of a target function call from the debugger. | |
356 | */ | |
357 | ||
358 | static void | |
359 | xstormy16_store_struct_return (CORE_ADDR addr, CORE_ADDR sp) | |
360 | { | |
361 | write_register (E_PTR_RET_REGNUM, addr); | |
362 | } | |
363 | ||
364 | /* Function: xstormy16_store_return_value | |
365 | Copy the function return value from VALBUF into the | |
366 | proper location for a function return. | |
367 | Called only in the context of the "return" command. | |
368 | */ | |
369 | ||
370 | static void | |
371 | xstormy16_store_return_value (struct type *type, char *valbuf) | |
372 | { | |
373 | CORE_ADDR return_buffer; | |
374 | char buf[xstormy16_reg_size]; | |
375 | ||
376 | if (xstormy16_type_is_scalar (type) && TYPE_LENGTH (type) == 1) | |
377 | { | |
378 | /* Add leading zeros to the value. */ | |
379 | memset (buf, 0, xstormy16_reg_size); | |
380 | memcpy (buf, valbuf, 1); | |
4caf0990 | 381 | deprecated_write_register_gen (E_1ST_ARG_REGNUM, buf); |
0c884e17 CV |
382 | } |
383 | else if (xstormy16_type_is_scalar (type) && | |
384 | TYPE_LENGTH (type) <= E_MAX_RETTYPE_SIZE_IN_REGS) | |
62700349 | 385 | deprecated_write_register_bytes (DEPRECATED_REGISTER_BYTE (E_1ST_ARG_REGNUM), |
73937e03 | 386 | valbuf, TYPE_LENGTH (type)); |
0c884e17 CV |
387 | else |
388 | { | |
389 | return_buffer = read_register (E_PTR_RET_REGNUM); | |
390 | write_memory (return_buffer, valbuf, TYPE_LENGTH (type)); | |
391 | } | |
392 | } | |
393 | ||
394 | /* Function: xstormy16_extract_struct_value_address | |
395 | Returns the address in which a function should return a struct value. | |
396 | Used in the contexts of the "return" command, and of | |
397 | target function calls from the debugger. | |
398 | */ | |
399 | ||
400 | static CORE_ADDR | |
07be497a | 401 | xstormy16_extract_struct_value_address (struct regcache *regcache) |
0c884e17 | 402 | { |
07be497a AC |
403 | /* FIXME: cagney/2004-01-17: Does the ABI guarantee that the return |
404 | address regster is preserved across function calls? Probably | |
405 | not, making this function wrong. */ | |
406 | ULONGEST val; | |
407 | regcache_raw_read_unsigned (regcache, E_PTR_RET_REGNUM, &val); | |
408 | return val; | |
0c884e17 CV |
409 | } |
410 | ||
411 | /* Function: xstormy16_use_struct_convention | |
412 | Returns non-zero if the given struct type will be returned using | |
413 | a special convention, rather than the normal function return method. | |
414 | 7sed in the contexts of the "return" command, and of | |
415 | target function calls from the debugger. | |
416 | */ | |
417 | ||
418 | static int | |
419 | xstormy16_use_struct_convention (int gcc_p, struct type *type) | |
420 | { | |
421 | return !xstormy16_type_is_scalar (type) | |
422 | || TYPE_LENGTH (type) > E_MAX_RETTYPE_SIZE_IN_REGS; | |
423 | } | |
424 | ||
425 | /* Function: frame_saved_register | |
426 | Returns the value that regnum had in frame fi | |
427 | (saved in fi or in one of its children). | |
428 | */ | |
429 | ||
430 | static CORE_ADDR | |
431 | xstormy16_frame_saved_register (struct frame_info *fi, int regnum) | |
432 | { | |
433 | int size = xstormy16_register_raw_size (regnum); | |
434 | char *buf = (char *) alloca (size); | |
435 | ||
bdcdd535 | 436 | deprecated_generic_get_saved_register (buf, NULL, NULL, fi, regnum, NULL); |
0c884e17 CV |
437 | return (CORE_ADDR) extract_unsigned_integer (buf, size); |
438 | } | |
439 | ||
440 | /* Function: xstormy16_scan_prologue | |
441 | Decode the instructions within the given address range. | |
442 | Decide when we must have reached the end of the function prologue. | |
443 | If a frame_info pointer is provided, fill in its saved_regs etc. | |
444 | ||
445 | Returns the address of the first instruction after the prologue. | |
446 | */ | |
447 | ||
448 | static CORE_ADDR | |
211a4f69 CV |
449 | xstormy16_scan_prologue (CORE_ADDR start_addr, CORE_ADDR end_addr, |
450 | struct frame_info *fi, int *frameless) | |
0c884e17 CV |
451 | { |
452 | CORE_ADDR sp = 0, fp = 0; | |
453 | CORE_ADDR next_addr; | |
454 | ULONGEST inst, inst2; | |
455 | LONGEST offset; | |
456 | int regnum; | |
457 | ||
211a4f69 CV |
458 | if (frameless) |
459 | *frameless = 1; | |
0c884e17 CV |
460 | if (fi) |
461 | { | |
462 | /* In a call dummy, don't touch the frame. */ | |
1e2330ba AC |
463 | if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (fi), get_frame_base (fi), |
464 | get_frame_base (fi))) | |
0c884e17 CV |
465 | return start_addr; |
466 | ||
467 | /* Grab the frame-relative values of SP and FP, needed below. | |
468 | The frame_saved_register function will find them on the | |
469 | stack or in the registers as appropriate. */ | |
470 | sp = xstormy16_frame_saved_register (fi, E_SP_REGNUM); | |
471 | fp = xstormy16_frame_saved_register (fi, E_FP_REGNUM); | |
472 | ||
473 | /* Initialize framesize with size of PC put on stack by CALLF inst. */ | |
da50a4b7 | 474 | get_frame_extra_info (fi)->framesize = xstormy16_pc_size; |
0c884e17 CV |
475 | } |
476 | for (next_addr = start_addr; | |
477 | next_addr < end_addr; next_addr += xstormy16_inst_size) | |
478 | { | |
479 | inst = read_memory_unsigned_integer (next_addr, xstormy16_inst_size); | |
480 | inst2 = read_memory_unsigned_integer (next_addr + xstormy16_inst_size, | |
481 | xstormy16_inst_size); | |
482 | ||
483 | if (inst >= 0x0082 && inst <= 0x008d) /* push r2 .. push r13 */ | |
484 | { | |
485 | if (fi) | |
486 | { | |
487 | regnum = inst & 0x000f; | |
1b1d3794 | 488 | deprecated_get_frame_saved_regs (fi)[regnum] = get_frame_extra_info (fi)->framesize; |
da50a4b7 | 489 | get_frame_extra_info (fi)->framesize += xstormy16_reg_size; |
0c884e17 CV |
490 | } |
491 | } | |
492 | ||
493 | /* optional stack allocation for args and local vars <= 4 byte */ | |
494 | else if (inst == 0x301f || inst == 0x303f) /* inc r15, #0x1/#0x3 */ | |
495 | { | |
496 | if (fi) /* Record the frame size. */ | |
da50a4b7 | 497 | get_frame_extra_info (fi)->framesize += ((inst & 0x0030) >> 4) + 1; |
0c884e17 CV |
498 | } |
499 | ||
500 | /* optional stack allocation for args and local vars > 4 && < 16 byte */ | |
501 | else if ((inst & 0xff0f) == 0x510f) /* 51Hf add r15, #0xH */ | |
502 | { | |
503 | if (fi) /* Record the frame size. */ | |
da50a4b7 | 504 | get_frame_extra_info (fi)->framesize += (inst & 0x00f0) >> 4; |
0c884e17 CV |
505 | } |
506 | ||
507 | /* optional stack allocation for args and local vars >= 16 byte */ | |
508 | else if (inst == 0x314f && inst2 >= 0x0010) /* 314f HHHH add r15, #0xH */ | |
509 | { | |
510 | if (fi) /* Record the frame size. */ | |
da50a4b7 | 511 | get_frame_extra_info (fi)->framesize += inst2; |
0c884e17 CV |
512 | next_addr += xstormy16_inst_size; |
513 | } | |
514 | ||
515 | else if (inst == 0x46fd) /* mov r13, r15 */ | |
516 | { | |
517 | if (fi) /* Record that the frame pointer is in use. */ | |
da50a4b7 | 518 | get_frame_extra_info (fi)->frameless_p = 0; |
211a4f69 CV |
519 | if (frameless) |
520 | *frameless = 0; | |
0c884e17 CV |
521 | } |
522 | ||
523 | /* optional copying of args in r2-r7 to r10-r13 */ | |
524 | /* Probably only in optimized case but legal action for prologue */ | |
525 | else if ((inst & 0xff00) == 0x4600 /* 46SD mov rD, rS */ | |
526 | && (inst & 0x00f0) >= 0x0020 && (inst & 0x00f0) <= 0x0070 | |
527 | && (inst & 0x000f) >= 0x00a0 && (inst & 0x000f) <= 0x000d) | |
528 | ; | |
529 | ||
530 | /* optional copying of args in r2-r7 to stack */ | |
531 | /* 72DS HHHH mov.b (rD, 0xHHHH), r(S-8) (bit3 always 1, bit2-0 = reg) */ | |
532 | /* 73DS HHHH mov.w (rD, 0xHHHH), r(S-8) */ | |
533 | else if ((inst & 0xfed8) == 0x72d8 && (inst & 0x0007) >= 2) | |
534 | { | |
535 | if (fi) | |
536 | { | |
537 | regnum = inst & 0x0007; | |
538 | /* Only 12 of 16 bits of the argument are used for the | |
539 | signed offset. */ | |
540 | offset = (LONGEST) (inst2 & 0x0fff); | |
541 | if (offset & 0x0800) | |
542 | offset -= 0x1000; | |
543 | ||
1b1d3794 | 544 | deprecated_get_frame_saved_regs (fi)[regnum] = get_frame_extra_info (fi)->framesize + offset; |
0c884e17 CV |
545 | } |
546 | next_addr += xstormy16_inst_size; | |
547 | } | |
548 | ||
549 | #if 0 | |
550 | /* 2001-08-10: Not part of the prologue anymore due to change in | |
551 | ABI. r8 and r9 are not used for argument passing anymore. */ | |
552 | ||
553 | /* optional copying of r8, r9 to stack */ | |
554 | /* 46S7; 73Df HHHH mov.w r7,rS; mov.w (rD, 0xHHHH), r7 D=8,9; S=13,15 */ | |
555 | /* 46S7; 72df HHHH mov.w r7,rS; mov.b (rD, 0xHHHH), r7 D=8,9; S=13,15 */ | |
556 | else if ((inst & 0xffef) == 0x4687 && (inst2 & 0xfedf) == 0x72df) | |
557 | { | |
558 | next_addr += xstormy16_inst_size; | |
559 | if (fi) | |
560 | { | |
561 | regnum = (inst & 0x00f0) >> 4; | |
562 | inst = inst2; | |
563 | inst2 = read_memory_unsigned_integer (next_addr | |
564 | + xstormy16_inst_size, | |
565 | xstormy16_inst_size); | |
566 | /* Only 12 of 16 bits of the argument are used for the | |
567 | signed offset. */ | |
568 | offset = (LONGEST) (inst2 & 0x0fff); | |
569 | if (offset & 0x0800) | |
570 | offset -= 0x1000; | |
571 | ||
572 | fi->saved_regs[regnum] = fi->extra_info->framesize + offset; | |
573 | } | |
574 | next_addr += xstormy16_inst_size; | |
575 | } | |
576 | #endif | |
577 | ||
578 | else /* Not a prologue instruction. */ | |
579 | break; | |
580 | } | |
581 | ||
582 | if (fi) | |
583 | { | |
584 | /* Special handling for the "saved" address of the SP: | |
585 | The SP is of course never saved on the stack at all, so | |
586 | by convention what we put here is simply the previous | |
587 | _value_ of the SP (as opposed to an address where the | |
588 | previous value would have been pushed). */ | |
da50a4b7 | 589 | if (get_frame_extra_info (fi)->frameless_p) |
0c884e17 | 590 | { |
1b1d3794 | 591 | deprecated_get_frame_saved_regs (fi)[E_SP_REGNUM] = sp - get_frame_extra_info (fi)->framesize; |
b0c6b05c | 592 | deprecated_update_frame_base_hack (fi, sp); |
0c884e17 CV |
593 | } |
594 | else | |
595 | { | |
1b1d3794 | 596 | deprecated_get_frame_saved_regs (fi)[E_SP_REGNUM] = fp - get_frame_extra_info (fi)->framesize; |
b0c6b05c | 597 | deprecated_update_frame_base_hack (fi, fp); |
0c884e17 CV |
598 | } |
599 | ||
600 | /* So far only offsets to the beginning of the frame are | |
601 | saved in the saved_regs. Now we now the relation between | |
602 | sp, fp and framesize. We know the beginning of the frame | |
603 | so we can translate the register offsets to real addresses. */ | |
604 | for (regnum = 0; regnum < E_SP_REGNUM; ++regnum) | |
1b1d3794 AC |
605 | if (deprecated_get_frame_saved_regs (fi)[regnum]) |
606 | deprecated_get_frame_saved_regs (fi)[regnum] += deprecated_get_frame_saved_regs (fi)[E_SP_REGNUM]; | |
0c884e17 CV |
607 | |
608 | /* Save address of PC on stack. */ | |
1b1d3794 | 609 | deprecated_get_frame_saved_regs (fi)[E_PC_REGNUM] = deprecated_get_frame_saved_regs (fi)[E_SP_REGNUM]; |
0c884e17 CV |
610 | } |
611 | ||
612 | return next_addr; | |
613 | } | |
614 | ||
615 | /* Function: xstormy16_skip_prologue | |
616 | If the input address is in a function prologue, | |
617 | returns the address of the end of the prologue; | |
618 | else returns the input address. | |
619 | ||
620 | Note: the input address is likely to be the function start, | |
621 | since this function is mainly used for advancing a breakpoint | |
622 | to the first line, or stepping to the first line when we have | |
623 | stepped into a function call. */ | |
624 | ||
625 | static CORE_ADDR | |
626 | xstormy16_skip_prologue (CORE_ADDR pc) | |
627 | { | |
628 | CORE_ADDR func_addr = 0, func_end = 0; | |
629 | char *func_name; | |
630 | ||
631 | if (find_pc_partial_function (pc, &func_name, &func_addr, &func_end)) | |
632 | { | |
633 | struct symtab_and_line sal; | |
634 | struct symbol *sym; | |
635 | ||
211a4f69 CV |
636 | /* Don't trust line number debug info in frameless functions. */ |
637 | int frameless = 1; | |
638 | CORE_ADDR plg_end = xstormy16_scan_prologue (func_addr, func_end, | |
639 | NULL, &frameless); | |
640 | if (frameless) | |
641 | return plg_end; | |
642 | ||
0c884e17 | 643 | /* Found a function. */ |
176620f1 | 644 | sym = lookup_symbol (func_name, NULL, VAR_DOMAIN, NULL, NULL); |
211a4f69 | 645 | /* Don't use line number debug info for assembly source files. */ |
0c884e17 CV |
646 | if (sym && SYMBOL_LANGUAGE (sym) != language_asm) |
647 | { | |
0c884e17 CV |
648 | sal = find_pc_line (func_addr, 0); |
649 | if (sal.end && sal.end < func_end) | |
650 | { | |
651 | /* Found a line number, use it as end of prologue. */ | |
652 | return sal.end; | |
653 | } | |
654 | } | |
211a4f69 CV |
655 | /* No useable line symbol. Use result of prologue parsing method. */ |
656 | return plg_end; | |
0c884e17 CV |
657 | } |
658 | ||
659 | /* No function symbol -- just return the PC. */ | |
660 | ||
661 | return (CORE_ADDR) pc; | |
662 | } | |
663 | ||
664 | /* The epilogue is defined here as the area at the end of a function, | |
665 | either on the `ret' instruction itself or after an instruction which | |
666 | destroys the function's stack frame. */ | |
667 | static int | |
668 | xstormy16_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) | |
669 | { | |
670 | CORE_ADDR addr, func_addr = 0, func_end = 0; | |
671 | ||
672 | if (find_pc_partial_function (pc, NULL, &func_addr, &func_end)) | |
673 | { | |
674 | ULONGEST inst, inst2; | |
675 | CORE_ADDR addr = func_end - xstormy16_inst_size; | |
676 | ||
677 | /* The Xstormy16 epilogue is max. 14 bytes long. */ | |
678 | if (pc < func_end - 7 * xstormy16_inst_size) | |
679 | return 0; | |
680 | ||
681 | /* Check if we're on a `ret' instruction. Otherwise it's | |
682 | too dangerous to proceed. */ | |
683 | inst = read_memory_unsigned_integer (addr, xstormy16_inst_size); | |
684 | if (inst != 0x0003) | |
685 | return 0; | |
686 | ||
687 | while ((addr -= xstormy16_inst_size) >= func_addr) | |
688 | { | |
689 | inst = read_memory_unsigned_integer (addr, xstormy16_inst_size); | |
690 | if (inst >= 0x009a && inst <= 0x009d) /* pop r10...r13 */ | |
691 | continue; | |
692 | if (inst == 0x305f || inst == 0x307f) /* dec r15, #0x1/#0x3 */ | |
693 | break; | |
694 | inst2 = read_memory_unsigned_integer (addr - xstormy16_inst_size, | |
695 | xstormy16_inst_size); | |
696 | if (inst2 == 0x314f && inst >= 0x8000) /* add r15, neg. value */ | |
697 | { | |
698 | addr -= xstormy16_inst_size; | |
699 | break; | |
700 | } | |
701 | return 0; | |
702 | } | |
703 | if (pc > addr) | |
704 | return 1; | |
705 | } | |
706 | return 0; | |
707 | } | |
708 | ||
709 | /* Function: xstormy16_frame_init_saved_regs | |
710 | Set up the 'saved_regs' array. | |
711 | This is a data structure containing the addresses on the stack | |
712 | where each register has been saved, for each stack frame. | |
713 | Registers that have not been saved will have zero here. | |
714 | The stack register is special: rather than the address where the | |
715 | stack register has been saved, saved_regs[SP_REGNUM] will have the | |
716 | actual value of the previous frame's stack register. | |
717 | ||
718 | This function may be called in any context where the saved register | |
ac2adee5 AC |
719 | values may be needed (backtrace, frame_info, frame_register). On |
720 | many targets, it is called directly by init_extra_frame_info, in | |
721 | part because the information may be needed immediately by | |
722 | frame_chain. */ | |
0c884e17 CV |
723 | |
724 | static void | |
725 | xstormy16_frame_init_saved_regs (struct frame_info *fi) | |
726 | { | |
727 | CORE_ADDR func_addr, func_end; | |
728 | ||
1b1d3794 | 729 | if (!deprecated_get_frame_saved_regs (fi)) |
0c884e17 CV |
730 | { |
731 | frame_saved_regs_zalloc (fi); | |
732 | ||
733 | /* Find the beginning of this function, so we can analyze its | |
734 | prologue. */ | |
50abf9e5 AC |
735 | if (find_pc_partial_function (get_frame_pc (fi), NULL, &func_addr, &func_end)) |
736 | xstormy16_scan_prologue (func_addr, get_frame_pc (fi), fi, NULL); | |
0c884e17 CV |
737 | /* Else we're out of luck (can't debug completely stripped code). |
738 | FIXME. */ | |
739 | } | |
740 | } | |
741 | ||
742 | /* Function: xstormy16_frame_saved_pc | |
743 | Returns the return address for the selected frame. | |
e6ba3bc9 AC |
744 | Called by frame_info, legacy_frame_chain_valid, and sometimes by |
745 | get_prev_frame. */ | |
0c884e17 CV |
746 | |
747 | static CORE_ADDR | |
748 | xstormy16_frame_saved_pc (struct frame_info *fi) | |
749 | { | |
750 | CORE_ADDR saved_pc; | |
751 | ||
1e2330ba AC |
752 | if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (fi), get_frame_base (fi), |
753 | get_frame_base (fi))) | |
0c884e17 | 754 | { |
1e2330ba AC |
755 | saved_pc = deprecated_read_register_dummy (get_frame_pc (fi), |
756 | get_frame_base (fi), | |
135c175f | 757 | E_PC_REGNUM); |
0c884e17 CV |
758 | } |
759 | else | |
760 | { | |
1b1d3794 | 761 | saved_pc = read_memory_unsigned_integer (deprecated_get_frame_saved_regs (fi)[E_PC_REGNUM], |
0c884e17 CV |
762 | xstormy16_pc_size); |
763 | } | |
764 | ||
765 | return saved_pc; | |
766 | } | |
767 | ||
768 | /* Function: xstormy16_init_extra_frame_info | |
769 | This is the constructor function for the frame_info struct, | |
770 | called whenever a new frame_info is created (from create_new_frame, | |
771 | and from get_prev_frame). | |
772 | */ | |
773 | ||
774 | static void | |
775 | xstormy16_init_extra_frame_info (int fromleaf, struct frame_info *fi) | |
776 | { | |
da50a4b7 | 777 | if (!get_frame_extra_info (fi)) |
0c884e17 | 778 | { |
a00a19e9 | 779 | frame_extra_info_zalloc (fi, sizeof (struct frame_extra_info)); |
da50a4b7 AC |
780 | get_frame_extra_info (fi)->framesize = 0; |
781 | get_frame_extra_info (fi)->frameless_p = 1; /* Default frameless, detect framed */ | |
0c884e17 CV |
782 | |
783 | /* By default, the fi->frame is set to the value of the FP reg by gdb. | |
784 | This may not always be right; we may be in a frameless function, | |
785 | or we may be in the prologue, before the FP has been set up. | |
786 | Unfortunately, we can't make this determination without first | |
787 | calling scan_prologue, and we can't do that unles we know the | |
50abf9e5 | 788 | get_frame_pc (fi). */ |
0c884e17 | 789 | |
50abf9e5 | 790 | if (!get_frame_pc (fi)) |
0c884e17 CV |
791 | { |
792 | /* Sometimes we are called from get_prev_frame without | |
793 | the PC being set up first. Long history, don't ask. | |
794 | Fortunately this will never happen from the outermost | |
795 | frame, so we should be able to get the saved pc from | |
796 | the next frame. */ | |
11c02a10 AC |
797 | if (get_next_frame (fi)) |
798 | deprecated_update_frame_pc_hack (fi, xstormy16_frame_saved_pc (get_next_frame (fi))); | |
0c884e17 CV |
799 | } |
800 | ||
801 | /* Take care of the saved_regs right here (non-lazy). */ | |
802 | xstormy16_frame_init_saved_regs (fi); | |
803 | } | |
804 | } | |
805 | ||
806 | /* Function: xstormy16_frame_chain | |
807 | Returns a pointer to the stack frame of the calling function. | |
808 | Called only from get_prev_frame. Needed for backtrace, "up", etc. | |
809 | */ | |
810 | ||
811 | static CORE_ADDR | |
812 | xstormy16_frame_chain (struct frame_info *fi) | |
813 | { | |
1e2330ba AC |
814 | if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (fi), get_frame_base (fi), |
815 | get_frame_base (fi))) | |
0c884e17 CV |
816 | { |
817 | /* Call dummy's frame is the same as caller's. */ | |
1e2330ba | 818 | return get_frame_base (fi); |
0c884e17 CV |
819 | } |
820 | else | |
821 | { | |
822 | /* Return computed offset from this frame's fp. */ | |
da50a4b7 | 823 | return get_frame_base (fi) - get_frame_extra_info (fi)->framesize; |
0c884e17 CV |
824 | } |
825 | } | |
826 | ||
827 | static int | |
828 | xstormy16_frame_chain_valid (CORE_ADDR chain, struct frame_info *thisframe) | |
829 | { | |
8bedc050 | 830 | return chain < 0x8000 && DEPRECATED_FRAME_SAVED_PC (thisframe) >= 0x8000 && |
da50a4b7 AC |
831 | (get_frame_extra_info (thisframe)->frameless_p || |
832 | get_frame_base (thisframe) - get_frame_extra_info (thisframe)->framesize == chain); | |
0c884e17 CV |
833 | } |
834 | ||
ac2adee5 AC |
835 | /* Function: xstormy16_saved_pc_after_call Returns the previous PC |
836 | immediately after a function call. This function is meant to | |
837 | bypass the regular frame_register() mechanism, ie. it is meant to | |
838 | work even if the frame isn't complete. Called by | |
839 | step_over_function, and sometimes by get_prev_frame. */ | |
0c884e17 CV |
840 | |
841 | static CORE_ADDR | |
842 | xstormy16_saved_pc_after_call (struct frame_info *ignore) | |
843 | { | |
844 | CORE_ADDR sp, pc, tmp; | |
845 | ||
846 | sp = read_register (E_SP_REGNUM) - xstormy16_pc_size; | |
847 | pc = read_memory_integer (sp, xstormy16_pc_size); | |
848 | ||
849 | /* Skip over jump table entry if necessary. */ | |
850 | if ((tmp = SKIP_TRAMPOLINE_CODE (pc))) | |
851 | pc = tmp; | |
852 | ||
853 | return pc; | |
854 | } | |
855 | ||
f4f9705a | 856 | const static unsigned char * |
0c884e17 CV |
857 | xstormy16_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr) |
858 | { | |
859 | static unsigned char breakpoint[] = { 0x06, 0x0 }; | |
860 | *lenptr = sizeof (breakpoint); | |
861 | return breakpoint; | |
862 | } | |
863 | ||
864 | /* Given a pointer to a jump table entry, return the address | |
865 | of the function it jumps to. Return 0 if not found. */ | |
866 | static CORE_ADDR | |
867 | xstormy16_resolve_jmp_table_entry (CORE_ADDR faddr) | |
868 | { | |
869 | struct obj_section *faddr_sect = find_pc_section (faddr); | |
870 | ||
871 | if (faddr_sect) | |
872 | { | |
873 | LONGEST inst, inst2, addr; | |
874 | char buf[2 * xstormy16_inst_size]; | |
875 | ||
876 | /* Return faddr if it's not pointing into the jump table. */ | |
877 | if (strcmp (faddr_sect->the_bfd_section->name, ".plt")) | |
878 | return faddr; | |
879 | ||
880 | if (!target_read_memory (faddr, buf, sizeof buf)) | |
881 | { | |
882 | inst = extract_unsigned_integer (buf, xstormy16_inst_size); | |
883 | inst2 = extract_unsigned_integer (buf + xstormy16_inst_size, | |
884 | xstormy16_inst_size); | |
885 | addr = inst2 << 8 | (inst & 0xff); | |
886 | return addr; | |
887 | } | |
888 | } | |
889 | return 0; | |
890 | } | |
891 | ||
892 | /* Given a function's address, attempt to find (and return) the | |
893 | address of the corresponding jump table entry. Return 0 if | |
894 | not found. */ | |
895 | static CORE_ADDR | |
896 | xstormy16_find_jmp_table_entry (CORE_ADDR faddr) | |
897 | { | |
898 | struct obj_section *faddr_sect = find_pc_section (faddr); | |
899 | ||
900 | if (faddr_sect) | |
901 | { | |
902 | struct obj_section *osect; | |
903 | ||
904 | /* Return faddr if it's already a pointer to a jump table entry. */ | |
905 | if (!strcmp (faddr_sect->the_bfd_section->name, ".plt")) | |
906 | return faddr; | |
907 | ||
908 | ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect) | |
909 | { | |
910 | if (!strcmp (osect->the_bfd_section->name, ".plt")) | |
911 | break; | |
912 | } | |
913 | ||
914 | if (osect < faddr_sect->objfile->sections_end) | |
915 | { | |
916 | CORE_ADDR addr; | |
917 | for (addr = osect->addr; | |
918 | addr < osect->endaddr; addr += 2 * xstormy16_inst_size) | |
919 | { | |
920 | int status; | |
921 | LONGEST inst, inst2, faddr2; | |
922 | char buf[2 * xstormy16_inst_size]; | |
923 | ||
924 | if (target_read_memory (addr, buf, sizeof buf)) | |
925 | return 0; | |
926 | inst = extract_unsigned_integer (buf, xstormy16_inst_size); | |
927 | inst2 = extract_unsigned_integer (buf + xstormy16_inst_size, | |
928 | xstormy16_inst_size); | |
929 | faddr2 = inst2 << 8 | (inst & 0xff); | |
930 | if (faddr == faddr2) | |
931 | return addr; | |
932 | } | |
933 | } | |
934 | } | |
935 | return 0; | |
936 | } | |
937 | ||
938 | static CORE_ADDR | |
939 | xstormy16_skip_trampoline_code (CORE_ADDR pc) | |
940 | { | |
941 | int tmp = xstormy16_resolve_jmp_table_entry (pc); | |
942 | ||
943 | if (tmp && tmp != pc) | |
944 | return tmp; | |
945 | return 0; | |
946 | } | |
947 | ||
948 | static int | |
949 | xstormy16_in_solib_call_trampoline (CORE_ADDR pc, char *name) | |
950 | { | |
951 | return xstormy16_skip_trampoline_code (pc) != 0; | |
952 | } | |
953 | ||
954 | static CORE_ADDR | |
66140c26 | 955 | xstormy16_pointer_to_address (struct type *type, const void *buf) |
0c884e17 CV |
956 | { |
957 | enum type_code target = TYPE_CODE (TYPE_TARGET_TYPE (type)); | |
7c0b4a20 | 958 | CORE_ADDR addr = extract_unsigned_integer (buf, TYPE_LENGTH (type)); |
0c884e17 CV |
959 | |
960 | if (target == TYPE_CODE_FUNC || target == TYPE_CODE_METHOD) | |
961 | { | |
962 | CORE_ADDR addr2 = xstormy16_resolve_jmp_table_entry (addr); | |
963 | if (addr2) | |
964 | addr = addr2; | |
965 | } | |
966 | ||
967 | return addr; | |
968 | } | |
969 | ||
970 | static void | |
971 | xstormy16_address_to_pointer (struct type *type, void *buf, CORE_ADDR addr) | |
972 | { | |
973 | enum type_code target = TYPE_CODE (TYPE_TARGET_TYPE (type)); | |
974 | ||
975 | if (target == TYPE_CODE_FUNC || target == TYPE_CODE_METHOD) | |
976 | { | |
977 | CORE_ADDR addr2 = xstormy16_find_jmp_table_entry (addr); | |
978 | if (addr2) | |
979 | addr = addr2; | |
980 | } | |
fbd9dcd3 | 981 | store_unsigned_integer (buf, TYPE_LENGTH (type), addr); |
0c884e17 CV |
982 | } |
983 | ||
984 | static CORE_ADDR | |
985 | xstormy16_stack_align (CORE_ADDR addr) | |
986 | { | |
987 | if (addr & 1) | |
988 | ++addr; | |
989 | return addr; | |
990 | } | |
991 | ||
a78f21af | 992 | static void |
0c884e17 CV |
993 | xstormy16_save_dummy_frame_tos (CORE_ADDR sp) |
994 | { | |
995 | generic_save_dummy_frame_tos (sp - xstormy16_pc_size); | |
996 | } | |
997 | ||
998 | /* Function: xstormy16_gdbarch_init | |
999 | Initializer function for the xstormy16 gdbarch vector. | |
1000 | Called by gdbarch. Sets up the gdbarch vector(s) for this target. */ | |
1001 | ||
1002 | static struct gdbarch * | |
1003 | xstormy16_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) | |
1004 | { | |
1005 | static LONGEST call_dummy_words[1] = { 0 }; | |
1006 | struct gdbarch_tdep *tdep = NULL; | |
1007 | struct gdbarch *gdbarch; | |
1008 | ||
1009 | /* find a candidate among the list of pre-declared architectures. */ | |
1010 | arches = gdbarch_list_lookup_by_info (arches, &info); | |
1011 | if (arches != NULL) | |
1012 | return (arches->gdbarch); | |
1013 | ||
1014 | #if 0 | |
1015 | tdep = (struct gdbarch_tdep *) xmalloc (sizeof (struct gdbarch_tdep)); | |
1016 | #endif | |
1017 | ||
1018 | gdbarch = gdbarch_alloc (&info, 0); | |
1019 | ||
a5afb99f AC |
1020 | /* NOTE: cagney/2002-12-06: This can be deleted when this arch is |
1021 | ready to unwind the PC first (see frame.c:get_prev_frame()). */ | |
0968aa8c | 1022 | set_gdbarch_deprecated_init_frame_pc (gdbarch, deprecated_init_frame_pc_default); |
a5afb99f | 1023 | |
0c884e17 CV |
1024 | /* |
1025 | * Basic register fields and methods. | |
1026 | */ | |
1027 | ||
1028 | set_gdbarch_num_regs (gdbarch, E_NUM_REGS); | |
1029 | set_gdbarch_num_pseudo_regs (gdbarch, 0); | |
1030 | set_gdbarch_sp_regnum (gdbarch, E_SP_REGNUM); | |
0ba6dca9 | 1031 | set_gdbarch_deprecated_fp_regnum (gdbarch, E_FP_REGNUM); |
0c884e17 CV |
1032 | set_gdbarch_pc_regnum (gdbarch, E_PC_REGNUM); |
1033 | set_gdbarch_register_name (gdbarch, xstormy16_register_name); | |
b1e29e33 | 1034 | set_gdbarch_deprecated_register_size (gdbarch, xstormy16_reg_size); |
b8b527c5 | 1035 | set_gdbarch_deprecated_register_bytes (gdbarch, E_ALL_REGS_SIZE); |
9c04cab7 AC |
1036 | set_gdbarch_deprecated_register_byte (gdbarch, xstormy16_register_byte); |
1037 | set_gdbarch_deprecated_register_raw_size (gdbarch, xstormy16_register_raw_size); | |
a0ed5532 | 1038 | set_gdbarch_deprecated_max_register_raw_size (gdbarch, xstormy16_pc_size); |
9c04cab7 | 1039 | set_gdbarch_deprecated_register_virtual_size (gdbarch, xstormy16_register_raw_size); |
a0ed5532 | 1040 | set_gdbarch_deprecated_max_register_virtual_size (gdbarch, 4); |
9c04cab7 | 1041 | set_gdbarch_deprecated_register_virtual_type (gdbarch, xstormy16_reg_virtual_type); |
0c884e17 CV |
1042 | |
1043 | /* | |
1044 | * Frame Info | |
1045 | */ | |
e9582e71 | 1046 | set_gdbarch_deprecated_init_extra_frame_info (gdbarch, |
0c884e17 | 1047 | xstormy16_init_extra_frame_info); |
f30ee0bc | 1048 | set_gdbarch_deprecated_frame_init_saved_regs (gdbarch, |
0c884e17 | 1049 | xstormy16_frame_init_saved_regs); |
618ce49f | 1050 | set_gdbarch_deprecated_frame_chain (gdbarch, xstormy16_frame_chain); |
129c1cd6 | 1051 | set_gdbarch_deprecated_get_saved_register (gdbarch, xstormy16_get_saved_register); |
6913c89a | 1052 | set_gdbarch_deprecated_saved_pc_after_call (gdbarch, xstormy16_saved_pc_after_call); |
8bedc050 | 1053 | set_gdbarch_deprecated_frame_saved_pc (gdbarch, xstormy16_frame_saved_pc); |
0c884e17 | 1054 | set_gdbarch_skip_prologue (gdbarch, xstormy16_skip_prologue); |
618ce49f | 1055 | set_gdbarch_deprecated_frame_chain_valid (gdbarch, xstormy16_frame_chain_valid); |
0c884e17 CV |
1056 | |
1057 | set_gdbarch_in_function_epilogue_p (gdbarch, | |
1058 | xstormy16_in_function_epilogue_p); | |
1059 | ||
1060 | /* | |
1061 | * Miscelany | |
1062 | */ | |
1063 | /* Stack grows up. */ | |
1064 | set_gdbarch_inner_than (gdbarch, core_addr_greaterthan); | |
0c884e17 | 1065 | |
0c884e17 CV |
1066 | /* |
1067 | * Call Dummies | |
1068 | * | |
1069 | * These values and methods are used when gdb calls a target function. */ | |
28f617b3 | 1070 | set_gdbarch_deprecated_push_return_address (gdbarch, xstormy16_push_return_address); |
26e9b323 | 1071 | set_gdbarch_deprecated_extract_return_value (gdbarch, xstormy16_extract_return_value); |
b81774d8 | 1072 | set_gdbarch_deprecated_push_arguments (gdbarch, xstormy16_push_arguments); |
749b82f6 | 1073 | set_gdbarch_deprecated_pop_frame (gdbarch, xstormy16_pop_frame); |
4183d812 | 1074 | set_gdbarch_deprecated_store_struct_return (gdbarch, xstormy16_store_struct_return); |
ebba8386 | 1075 | set_gdbarch_deprecated_store_return_value (gdbarch, xstormy16_store_return_value); |
74055713 | 1076 | set_gdbarch_deprecated_extract_struct_value_address (gdbarch, xstormy16_extract_struct_value_address); |
0c884e17 CV |
1077 | set_gdbarch_use_struct_convention (gdbarch, |
1078 | xstormy16_use_struct_convention); | |
b1e29e33 AC |
1079 | set_gdbarch_deprecated_call_dummy_words (gdbarch, call_dummy_words); |
1080 | set_gdbarch_deprecated_sizeof_call_dummy_words (gdbarch, 0); | |
0c884e17 CV |
1081 | set_gdbarch_breakpoint_from_pc (gdbarch, xstormy16_breakpoint_from_pc); |
1082 | ||
71c08af0 | 1083 | set_gdbarch_char_signed (gdbarch, 0); |
0c884e17 CV |
1084 | set_gdbarch_int_bit (gdbarch, 2 * TARGET_CHAR_BIT); |
1085 | set_gdbarch_ptr_bit (gdbarch, 2 * TARGET_CHAR_BIT); | |
1086 | set_gdbarch_addr_bit (gdbarch, 4 * TARGET_CHAR_BIT); | |
1087 | set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT); | |
1088 | ||
1089 | set_gdbarch_address_to_pointer (gdbarch, xstormy16_address_to_pointer); | |
1090 | set_gdbarch_pointer_to_address (gdbarch, xstormy16_pointer_to_address); | |
1091 | ||
f27dd7fd | 1092 | set_gdbarch_deprecated_stack_align (gdbarch, xstormy16_stack_align); |
0c884e17 | 1093 | |
a59fe496 | 1094 | set_gdbarch_deprecated_save_dummy_frame_tos (gdbarch, xstormy16_save_dummy_frame_tos); |
0c884e17 CV |
1095 | |
1096 | set_gdbarch_skip_trampoline_code (gdbarch, xstormy16_skip_trampoline_code); | |
1097 | ||
1098 | set_gdbarch_in_solib_call_trampoline (gdbarch, | |
1099 | xstormy16_in_solib_call_trampoline); | |
1100 | ||
6c0e89ed | 1101 | /* Should be using push_dummy_call. */ |
b46e02f6 | 1102 | set_gdbarch_deprecated_dummy_write_sp (gdbarch, deprecated_write_sp); |
6c0e89ed | 1103 | |
36482093 AC |
1104 | set_gdbarch_print_insn (gdbarch, print_insn_xstormy16); |
1105 | ||
0c884e17 CV |
1106 | return gdbarch; |
1107 | } | |
1108 | ||
1109 | /* Function: _initialize_xstormy16_tdep | |
1110 | Initializer function for the Sanyo Xstormy16a module. | |
1111 | Called by gdb at start-up. */ | |
1112 | ||
a78f21af AC |
1113 | extern initialize_file_ftype _initialize_xstormy16_tdep; /* -Wmissing-prototypes */ |
1114 | ||
0c884e17 CV |
1115 | void |
1116 | _initialize_xstormy16_tdep (void) | |
1117 | { | |
0c884e17 | 1118 | register_gdbarch_init (bfd_arch_xstormy16, xstormy16_gdbarch_init); |
0c884e17 | 1119 | } |