Commit | Line | Data |
---|---|---|
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" | |
25 | #include "symfile.h" | |
26 | #include "arch-utils.h" | |
27 | #include "regcache.h" | |
28 | #include "gdbcore.h" | |
29 | #include "objfiles.h" | |
a89aa300 | 30 | #include "dis-asm.h" |
0c884e17 CV |
31 | |
32 | struct gdbarch_tdep | |
33 | { | |
34 | /* gdbarch target dependent data here. Currently unused for Xstormy16. */ | |
35 | }; | |
36 | ||
37 | /* Extra info which is saved in each frame_info. */ | |
38 | struct frame_extra_info | |
39 | { | |
40 | int framesize; | |
41 | int frameless_p; | |
42 | }; | |
43 | ||
44 | enum gdb_regnum | |
45 | { | |
46 | /* Xstormy16 has 16 general purpose registers (R0-R15) plus PC. | |
47 | Functions will return their values in register R2-R7 as they fit. | |
48 | Otherwise a hidden pointer to an big enough area is given as argument | |
49 | to the function in r2. Further arguments are beginning in r3 then. | |
50 | R13 is used as frame pointer when GCC compiles w/o optimization | |
51 | R14 is used as "PSW", displaying the CPU status. | |
52 | R15 is used implicitely as stack pointer. */ | |
53 | E_R0_REGNUM, | |
54 | E_R1_REGNUM, | |
55 | E_R2_REGNUM, E_1ST_ARG_REGNUM = E_R2_REGNUM, E_PTR_RET_REGNUM = E_R2_REGNUM, | |
56 | E_R3_REGNUM, | |
57 | E_R4_REGNUM, | |
58 | E_R5_REGNUM, | |
59 | E_R6_REGNUM, | |
60 | E_R7_REGNUM, E_LST_ARG_REGNUM = E_R7_REGNUM, | |
61 | E_R8_REGNUM, | |
62 | E_R9_REGNUM, | |
63 | E_R10_REGNUM, | |
64 | E_R11_REGNUM, | |
65 | E_R12_REGNUM, | |
66 | E_R13_REGNUM, E_FP_REGNUM = E_R13_REGNUM, | |
67 | E_R14_REGNUM, E_PSW_REGNUM = E_R14_REGNUM, | |
68 | E_R15_REGNUM, E_SP_REGNUM = E_R15_REGNUM, | |
69 | E_PC_REGNUM, | |
70 | E_NUM_REGS | |
71 | }; | |
72 | ||
73 | /* Size of instructions, registers, etc. */ | |
74 | enum | |
75 | { | |
76 | xstormy16_inst_size = 2, | |
77 | xstormy16_reg_size = 2, | |
78 | xstormy16_pc_size = 4 | |
79 | }; | |
80 | ||
81 | /* Size of return datatype which fits into the remaining return registers. */ | |
82 | #define E_MAX_RETTYPE_SIZE(regnum) ((E_LST_ARG_REGNUM - (regnum) + 1) \ | |
83 | * xstormy16_reg_size) | |
84 | ||
85 | /* Size of return datatype which fits into all return registers. */ | |
86 | enum | |
87 | { | |
88 | E_MAX_RETTYPE_SIZE_IN_REGS = E_MAX_RETTYPE_SIZE (E_R2_REGNUM) | |
89 | }; | |
90 | ||
91 | ||
92 | /* Size of all registers as a whole. */ | |
93 | enum | |
94 | { | |
95 | E_ALL_REGS_SIZE = (E_NUM_REGS - 1) * xstormy16_reg_size + xstormy16_pc_size | |
96 | }; | |
97 | ||
98 | /* Function: xstormy16_register_name | |
99 | Returns the name of the standard Xstormy16 register N. */ | |
100 | ||
fa88f677 | 101 | static const char * |
0c884e17 CV |
102 | xstormy16_register_name (int regnum) |
103 | { | |
104 | static char *register_names[] = { | |
105 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
106 | "r8", "r9", "r10", "r11", "r12", "r13", | |
107 | "psw", "sp", "pc" | |
108 | }; | |
109 | ||
110 | if (regnum < 0 || | |
111 | regnum >= sizeof (register_names) / sizeof (register_names[0])) | |
112 | internal_error (__FILE__, __LINE__, | |
113 | "xstormy16_register_name: illegal register number %d", | |
114 | regnum); | |
115 | else | |
116 | return register_names[regnum]; | |
117 | ||
118 | } | |
119 | ||
120 | /* Function: xstormy16_register_byte | |
121 | Returns the byte position in the register cache for register N. */ | |
122 | ||
123 | static int | |
124 | xstormy16_register_byte (int regnum) | |
125 | { | |
126 | if (regnum < 0 || regnum >= E_NUM_REGS) | |
127 | internal_error (__FILE__, __LINE__, | |
128 | "xstormy16_register_byte: illegal register number %d", | |
129 | regnum); | |
130 | else | |
131 | /* All registers occupy 2 bytes in the regcache except for PC | |
132 | which is the last one. Therefore the byte position is still | |
133 | simply a multiple of 2. */ | |
134 | return regnum * xstormy16_reg_size; | |
135 | } | |
136 | ||
137 | /* Function: xstormy16_register_raw_size | |
138 | Returns the number of bytes occupied by the register on the target. */ | |
139 | ||
140 | static int | |
141 | xstormy16_register_raw_size (int regnum) | |
142 | { | |
143 | if (regnum < 0 || regnum >= E_NUM_REGS) | |
144 | internal_error (__FILE__, __LINE__, | |
145 | "xstormy16_register_raw_size: illegal register number %d", | |
146 | regnum); | |
147 | /* Only the PC has 4 Byte, all other registers 2 Byte. */ | |
148 | else if (regnum == E_PC_REGNUM) | |
149 | return xstormy16_pc_size; | |
150 | else | |
151 | return xstormy16_reg_size; | |
152 | } | |
153 | ||
0c884e17 CV |
154 | /* Function: xstormy16_reg_virtual_type |
155 | Returns the default type for register N. */ | |
156 | ||
157 | static struct type * | |
158 | xstormy16_reg_virtual_type (int regnum) | |
159 | { | |
160 | if (regnum < 0 || regnum >= E_NUM_REGS) | |
161 | internal_error (__FILE__, __LINE__, | |
162 | "xstormy16_register_virtual_type: illegal register number %d", | |
163 | regnum); | |
164 | else if (regnum == E_PC_REGNUM) | |
165 | return builtin_type_uint32; | |
166 | else | |
167 | return builtin_type_uint16; | |
168 | } | |
169 | ||
170 | /* Function: xstormy16_get_saved_register | |
171 | Find a register's saved value on the call stack. */ | |
172 | ||
173 | static void | |
174 | xstormy16_get_saved_register (char *raw_buffer, | |
175 | int *optimized, | |
176 | CORE_ADDR *addrp, | |
177 | struct frame_info *fi, | |
178 | int regnum, enum lval_type *lval) | |
179 | { | |
bdcdd535 | 180 | deprecated_generic_get_saved_register (raw_buffer, optimized, addrp, fi, regnum, lval); |
0c884e17 CV |
181 | } |
182 | ||
183 | /* Function: xstormy16_type_is_scalar | |
184 | Makes the decision if a given type is a scalar types. Scalar | |
185 | types are returned in the registers r2-r7 as they fit. */ | |
186 | ||
187 | static int | |
188 | xstormy16_type_is_scalar (struct type *t) | |
189 | { | |
190 | return (TYPE_CODE(t) != TYPE_CODE_STRUCT | |
191 | && TYPE_CODE(t) != TYPE_CODE_UNION | |
192 | && TYPE_CODE(t) != TYPE_CODE_ARRAY); | |
193 | } | |
194 | ||
195 | /* Function: xstormy16_extract_return_value | |
196 | Copy the function's return value into VALBUF. | |
197 | This function is called only in the context of "target function calls", | |
198 | ie. when the debugger forces a function to be called in the child, and | |
199 | when the debugger forces a function to return prematurely via the | |
200 | "return" command. */ | |
201 | ||
202 | static void | |
203 | xstormy16_extract_return_value (struct type *type, char *regbuf, char *valbuf) | |
204 | { | |
205 | CORE_ADDR return_buffer; | |
206 | int offset = 0; | |
207 | ||
208 | if (xstormy16_type_is_scalar (type) | |
209 | && TYPE_LENGTH (type) <= E_MAX_RETTYPE_SIZE_IN_REGS) | |
210 | { | |
211 | /* Scalar return values of <= 12 bytes are returned in | |
212 | E_1ST_ARG_REGNUM to E_LST_ARG_REGNUM. */ | |
213 | memcpy (valbuf, | |
62700349 | 214 | ®buf[DEPRECATED_REGISTER_BYTE (E_1ST_ARG_REGNUM)] + offset, |
0c884e17 CV |
215 | TYPE_LENGTH (type)); |
216 | } | |
217 | else | |
218 | { | |
219 | /* Aggregates and return values > 12 bytes are returned in memory, | |
220 | pointed to by R2. */ | |
221 | return_buffer = | |
62700349 | 222 | extract_unsigned_integer (regbuf + DEPRECATED_REGISTER_BYTE (E_PTR_RET_REGNUM), |
12c266ea | 223 | DEPRECATED_REGISTER_RAW_SIZE (E_PTR_RET_REGNUM)); |
0c884e17 CV |
224 | |
225 | read_memory (return_buffer, valbuf, TYPE_LENGTH (type)); | |
226 | } | |
227 | } | |
228 | ||
229 | /* Function: xstormy16_push_arguments | |
230 | Setup the function arguments for GDB to call a function in the inferior. | |
231 | Called only in the context of a target function call from the debugger. | |
232 | Returns the value of the SP register after the args are pushed. | |
233 | */ | |
234 | ||
235 | static CORE_ADDR | |
236 | xstormy16_push_arguments (int nargs, struct value **args, CORE_ADDR sp, | |
237 | int struct_return, CORE_ADDR struct_addr) | |
238 | { | |
239 | CORE_ADDR stack_dest = sp; | |
240 | int argreg = E_1ST_ARG_REGNUM; | |
241 | int i, j; | |
242 | int typelen, slacklen; | |
243 | char *val; | |
244 | ||
245 | /* If struct_return is true, then the struct return address will | |
246 | consume one argument-passing register. */ | |
247 | if (struct_return) | |
248 | argreg++; | |
249 | ||
250 | /* Arguments are passed in R2-R7 as they fit. If an argument doesn't | |
251 | fit in the remaining registers we're switching over to the stack. | |
252 | No argument is put on stack partially and as soon as we switched | |
253 | over to stack no further argument is put in a register even if it | |
254 | would fit in the remaining unused registers. */ | |
255 | for (i = 0; i < nargs && argreg <= E_LST_ARG_REGNUM; i++) | |
256 | { | |
257 | typelen = TYPE_LENGTH (VALUE_ENCLOSING_TYPE (args[i])); | |
258 | if (typelen > E_MAX_RETTYPE_SIZE (argreg)) | |
259 | break; | |
260 | ||
261 | /* Put argument into registers wordwise. */ | |
262 | val = VALUE_CONTENTS (args[i]); | |
263 | for (j = 0; j < typelen; j += xstormy16_reg_size) | |
264 | write_register (argreg++, | |
265 | extract_unsigned_integer (val + j, | |
266 | typelen - j == | |
267 | 1 ? 1 : | |
268 | xstormy16_reg_size)); | |
269 | } | |
270 | ||
271 | /* Align SP */ | |
272 | if (stack_dest & 1) | |
273 | ++stack_dest; | |
274 | ||
275 | /* Loop backwards through remaining arguments and push them on the stack, | |
276 | wordaligned. */ | |
277 | for (j = nargs - 1; j >= i; j--) | |
278 | { | |
279 | typelen = TYPE_LENGTH (VALUE_ENCLOSING_TYPE (args[j])); | |
280 | slacklen = typelen & 1; | |
281 | val = alloca (typelen + slacklen); | |
282 | memcpy (val, VALUE_CONTENTS (args[j]), typelen); | |
283 | memset (val + typelen, 0, slacklen); | |
284 | ||
285 | /* Now write this data to the stack. The stack grows upwards. */ | |
286 | write_memory (stack_dest, val, typelen + slacklen); | |
287 | stack_dest += typelen + slacklen; | |
288 | } | |
289 | ||
290 | /* And that should do it. Return the new stack pointer. */ | |
291 | return stack_dest; | |
292 | } | |
293 | ||
294 | /* Function: xstormy16_push_return_address (pc) | |
295 | Setup the return address for GDB to call a function in the inferior. | |
296 | Called only in the context of a target function call from the debugger. | |
297 | Returns the value of the SP register when the operation is finished | |
298 | (which may or may not be the same as before). | |
299 | */ | |
300 | ||
a78f21af | 301 | static CORE_ADDR |
0c884e17 CV |
302 | xstormy16_push_return_address (CORE_ADDR pc, CORE_ADDR sp) |
303 | { | |
304 | unsigned char buf[xstormy16_pc_size]; | |
305 | ||
88a82a65 | 306 | store_unsigned_integer (buf, xstormy16_pc_size, entry_point_address ()); |
0c884e17 CV |
307 | write_memory (sp, buf, xstormy16_pc_size); |
308 | return sp + xstormy16_pc_size; | |
309 | } | |
310 | ||
311 | /* Function: xstormy16_pop_frame | |
312 | Destroy the innermost (Top-Of-Stack) stack frame, restoring the | |
313 | machine state that was in effect before the frame was created. | |
314 | Used in the contexts of the "return" command, and of | |
315 | target function calls from the debugger. | |
316 | */ | |
317 | ||
318 | static void | |
319 | xstormy16_pop_frame (void) | |
320 | { | |
321 | struct frame_info *fi = get_current_frame (); | |
322 | int i; | |
323 | ||
324 | if (fi == NULL) | |
325 | return; /* paranoia */ | |
326 | ||
1e2330ba AC |
327 | if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (fi), get_frame_base (fi), |
328 | get_frame_base (fi))) | |
0c884e17 CV |
329 | { |
330 | generic_pop_dummy_frame (); | |
331 | } | |
332 | else | |
333 | { | |
334 | /* Restore the saved regs. */ | |
335 | for (i = 0; i < NUM_REGS; i++) | |
1b1d3794 | 336 | if (deprecated_get_frame_saved_regs (fi)[i]) |
0c884e17 CV |
337 | { |
338 | if (i == SP_REGNUM) | |
1b1d3794 | 339 | write_register (i, deprecated_get_frame_saved_regs (fi)[i]); |
0c884e17 | 340 | else if (i == E_PC_REGNUM) |
1b1d3794 | 341 | write_register (i, read_memory_integer (deprecated_get_frame_saved_regs (fi)[i], |
0c884e17 CV |
342 | xstormy16_pc_size)); |
343 | else | |
1b1d3794 | 344 | write_register (i, read_memory_integer (deprecated_get_frame_saved_regs (fi)[i], |
0c884e17 CV |
345 | xstormy16_reg_size)); |
346 | } | |
347 | /* Restore the PC */ | |
8bedc050 | 348 | write_register (PC_REGNUM, DEPRECATED_FRAME_SAVED_PC (fi)); |
0c884e17 CV |
349 | flush_cached_frames (); |
350 | } | |
351 | return; | |
352 | } | |
353 | ||
354 | /* Function: xstormy16_store_struct_return | |
355 | Copy the (struct) function return value to its destined location. | |
356 | Called only in the context of a target function call from the debugger. | |
357 | */ | |
358 | ||
359 | static void | |
360 | xstormy16_store_struct_return (CORE_ADDR addr, CORE_ADDR sp) | |
361 | { | |
362 | write_register (E_PTR_RET_REGNUM, addr); | |
363 | } | |
364 | ||
365 | /* Function: xstormy16_store_return_value | |
366 | Copy the function return value from VALBUF into the | |
367 | proper location for a function return. | |
368 | Called only in the context of the "return" command. | |
369 | */ | |
370 | ||
371 | static void | |
372 | xstormy16_store_return_value (struct type *type, char *valbuf) | |
373 | { | |
374 | CORE_ADDR return_buffer; | |
375 | char buf[xstormy16_reg_size]; | |
376 | ||
377 | if (xstormy16_type_is_scalar (type) && TYPE_LENGTH (type) == 1) | |
378 | { | |
379 | /* Add leading zeros to the value. */ | |
380 | memset (buf, 0, xstormy16_reg_size); | |
381 | memcpy (buf, valbuf, 1); | |
4caf0990 | 382 | deprecated_write_register_gen (E_1ST_ARG_REGNUM, buf); |
0c884e17 CV |
383 | } |
384 | else if (xstormy16_type_is_scalar (type) && | |
385 | TYPE_LENGTH (type) <= E_MAX_RETTYPE_SIZE_IN_REGS) | |
62700349 | 386 | deprecated_write_register_bytes (DEPRECATED_REGISTER_BYTE (E_1ST_ARG_REGNUM), |
73937e03 | 387 | valbuf, TYPE_LENGTH (type)); |
0c884e17 CV |
388 | else |
389 | { | |
390 | return_buffer = read_register (E_PTR_RET_REGNUM); | |
391 | write_memory (return_buffer, valbuf, TYPE_LENGTH (type)); | |
392 | } | |
393 | } | |
394 | ||
395 | /* Function: xstormy16_extract_struct_value_address | |
396 | Returns the address in which a function should return a struct value. | |
397 | Used in the contexts of the "return" command, and of | |
398 | target function calls from the debugger. | |
399 | */ | |
400 | ||
401 | static CORE_ADDR | |
07be497a | 402 | xstormy16_extract_struct_value_address (struct regcache *regcache) |
0c884e17 | 403 | { |
07be497a AC |
404 | /* FIXME: cagney/2004-01-17: Does the ABI guarantee that the return |
405 | address regster is preserved across function calls? Probably | |
406 | not, making this function wrong. */ | |
407 | ULONGEST val; | |
408 | regcache_raw_read_unsigned (regcache, E_PTR_RET_REGNUM, &val); | |
409 | return val; | |
0c884e17 CV |
410 | } |
411 | ||
412 | /* Function: xstormy16_use_struct_convention | |
413 | Returns non-zero if the given struct type will be returned using | |
414 | a special convention, rather than the normal function return method. | |
415 | 7sed in the contexts of the "return" command, and of | |
416 | target function calls from the debugger. | |
417 | */ | |
418 | ||
419 | static int | |
420 | xstormy16_use_struct_convention (int gcc_p, struct type *type) | |
421 | { | |
422 | return !xstormy16_type_is_scalar (type) | |
423 | || TYPE_LENGTH (type) > E_MAX_RETTYPE_SIZE_IN_REGS; | |
424 | } | |
425 | ||
426 | /* Function: frame_saved_register | |
427 | Returns the value that regnum had in frame fi | |
428 | (saved in fi or in one of its children). | |
429 | */ | |
430 | ||
431 | static CORE_ADDR | |
432 | xstormy16_frame_saved_register (struct frame_info *fi, int regnum) | |
433 | { | |
434 | int size = xstormy16_register_raw_size (regnum); | |
435 | char *buf = (char *) alloca (size); | |
436 | ||
bdcdd535 | 437 | deprecated_generic_get_saved_register (buf, NULL, NULL, fi, regnum, NULL); |
0c884e17 CV |
438 | return (CORE_ADDR) extract_unsigned_integer (buf, size); |
439 | } | |
440 | ||
441 | /* Function: xstormy16_scan_prologue | |
442 | Decode the instructions within the given address range. | |
443 | Decide when we must have reached the end of the function prologue. | |
444 | If a frame_info pointer is provided, fill in its saved_regs etc. | |
445 | ||
446 | Returns the address of the first instruction after the prologue. | |
447 | */ | |
448 | ||
449 | static CORE_ADDR | |
211a4f69 CV |
450 | xstormy16_scan_prologue (CORE_ADDR start_addr, CORE_ADDR end_addr, |
451 | struct frame_info *fi, int *frameless) | |
0c884e17 CV |
452 | { |
453 | CORE_ADDR sp = 0, fp = 0; | |
454 | CORE_ADDR next_addr; | |
455 | ULONGEST inst, inst2; | |
456 | LONGEST offset; | |
457 | int regnum; | |
458 | ||
211a4f69 CV |
459 | if (frameless) |
460 | *frameless = 1; | |
0c884e17 CV |
461 | if (fi) |
462 | { | |
463 | /* In a call dummy, don't touch the frame. */ | |
1e2330ba AC |
464 | if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (fi), get_frame_base (fi), |
465 | get_frame_base (fi))) | |
0c884e17 CV |
466 | return start_addr; |
467 | ||
468 | /* Grab the frame-relative values of SP and FP, needed below. | |
469 | The frame_saved_register function will find them on the | |
470 | stack or in the registers as appropriate. */ | |
471 | sp = xstormy16_frame_saved_register (fi, E_SP_REGNUM); | |
472 | fp = xstormy16_frame_saved_register (fi, E_FP_REGNUM); | |
473 | ||
474 | /* Initialize framesize with size of PC put on stack by CALLF inst. */ | |
da50a4b7 | 475 | get_frame_extra_info (fi)->framesize = xstormy16_pc_size; |
0c884e17 CV |
476 | } |
477 | for (next_addr = start_addr; | |
478 | next_addr < end_addr; next_addr += xstormy16_inst_size) | |
479 | { | |
480 | inst = read_memory_unsigned_integer (next_addr, xstormy16_inst_size); | |
481 | inst2 = read_memory_unsigned_integer (next_addr + xstormy16_inst_size, | |
482 | xstormy16_inst_size); | |
483 | ||
484 | if (inst >= 0x0082 && inst <= 0x008d) /* push r2 .. push r13 */ | |
485 | { | |
486 | if (fi) | |
487 | { | |
488 | regnum = inst & 0x000f; | |
1b1d3794 | 489 | deprecated_get_frame_saved_regs (fi)[regnum] = get_frame_extra_info (fi)->framesize; |
da50a4b7 | 490 | get_frame_extra_info (fi)->framesize += xstormy16_reg_size; |
0c884e17 CV |
491 | } |
492 | } | |
493 | ||
494 | /* optional stack allocation for args and local vars <= 4 byte */ | |
495 | else if (inst == 0x301f || inst == 0x303f) /* inc r15, #0x1/#0x3 */ | |
496 | { | |
497 | if (fi) /* Record the frame size. */ | |
da50a4b7 | 498 | get_frame_extra_info (fi)->framesize += ((inst & 0x0030) >> 4) + 1; |
0c884e17 CV |
499 | } |
500 | ||
501 | /* optional stack allocation for args and local vars > 4 && < 16 byte */ | |
502 | else if ((inst & 0xff0f) == 0x510f) /* 51Hf add r15, #0xH */ | |
503 | { | |
504 | if (fi) /* Record the frame size. */ | |
da50a4b7 | 505 | get_frame_extra_info (fi)->framesize += (inst & 0x00f0) >> 4; |
0c884e17 CV |
506 | } |
507 | ||
508 | /* optional stack allocation for args and local vars >= 16 byte */ | |
509 | else if (inst == 0x314f && inst2 >= 0x0010) /* 314f HHHH add r15, #0xH */ | |
510 | { | |
511 | if (fi) /* Record the frame size. */ | |
da50a4b7 | 512 | get_frame_extra_info (fi)->framesize += inst2; |
0c884e17 CV |
513 | next_addr += xstormy16_inst_size; |
514 | } | |
515 | ||
516 | else if (inst == 0x46fd) /* mov r13, r15 */ | |
517 | { | |
518 | if (fi) /* Record that the frame pointer is in use. */ | |
da50a4b7 | 519 | get_frame_extra_info (fi)->frameless_p = 0; |
211a4f69 CV |
520 | if (frameless) |
521 | *frameless = 0; | |
0c884e17 CV |
522 | } |
523 | ||
524 | /* optional copying of args in r2-r7 to r10-r13 */ | |
525 | /* Probably only in optimized case but legal action for prologue */ | |
526 | else if ((inst & 0xff00) == 0x4600 /* 46SD mov rD, rS */ | |
527 | && (inst & 0x00f0) >= 0x0020 && (inst & 0x00f0) <= 0x0070 | |
528 | && (inst & 0x000f) >= 0x00a0 && (inst & 0x000f) <= 0x000d) | |
529 | ; | |
530 | ||
531 | /* optional copying of args in r2-r7 to stack */ | |
532 | /* 72DS HHHH mov.b (rD, 0xHHHH), r(S-8) (bit3 always 1, bit2-0 = reg) */ | |
533 | /* 73DS HHHH mov.w (rD, 0xHHHH), r(S-8) */ | |
534 | else if ((inst & 0xfed8) == 0x72d8 && (inst & 0x0007) >= 2) | |
535 | { | |
536 | if (fi) | |
537 | { | |
538 | regnum = inst & 0x0007; | |
539 | /* Only 12 of 16 bits of the argument are used for the | |
540 | signed offset. */ | |
541 | offset = (LONGEST) (inst2 & 0x0fff); | |
542 | if (offset & 0x0800) | |
543 | offset -= 0x1000; | |
544 | ||
1b1d3794 | 545 | deprecated_get_frame_saved_regs (fi)[regnum] = get_frame_extra_info (fi)->framesize + offset; |
0c884e17 CV |
546 | } |
547 | next_addr += xstormy16_inst_size; | |
548 | } | |
549 | ||
550 | #if 0 | |
551 | /* 2001-08-10: Not part of the prologue anymore due to change in | |
552 | ABI. r8 and r9 are not used for argument passing anymore. */ | |
553 | ||
554 | /* optional copying of r8, r9 to stack */ | |
555 | /* 46S7; 73Df HHHH mov.w r7,rS; mov.w (rD, 0xHHHH), r7 D=8,9; S=13,15 */ | |
556 | /* 46S7; 72df HHHH mov.w r7,rS; mov.b (rD, 0xHHHH), r7 D=8,9; S=13,15 */ | |
557 | else if ((inst & 0xffef) == 0x4687 && (inst2 & 0xfedf) == 0x72df) | |
558 | { | |
559 | next_addr += xstormy16_inst_size; | |
560 | if (fi) | |
561 | { | |
562 | regnum = (inst & 0x00f0) >> 4; | |
563 | inst = inst2; | |
564 | inst2 = read_memory_unsigned_integer (next_addr | |
565 | + xstormy16_inst_size, | |
566 | xstormy16_inst_size); | |
567 | /* Only 12 of 16 bits of the argument are used for the | |
568 | signed offset. */ | |
569 | offset = (LONGEST) (inst2 & 0x0fff); | |
570 | if (offset & 0x0800) | |
571 | offset -= 0x1000; | |
572 | ||
573 | fi->saved_regs[regnum] = fi->extra_info->framesize + offset; | |
574 | } | |
575 | next_addr += xstormy16_inst_size; | |
576 | } | |
577 | #endif | |
578 | ||
579 | else /* Not a prologue instruction. */ | |
580 | break; | |
581 | } | |
582 | ||
583 | if (fi) | |
584 | { | |
585 | /* Special handling for the "saved" address of the SP: | |
586 | The SP is of course never saved on the stack at all, so | |
587 | by convention what we put here is simply the previous | |
588 | _value_ of the SP (as opposed to an address where the | |
589 | previous value would have been pushed). */ | |
da50a4b7 | 590 | if (get_frame_extra_info (fi)->frameless_p) |
0c884e17 | 591 | { |
1b1d3794 | 592 | deprecated_get_frame_saved_regs (fi)[E_SP_REGNUM] = sp - get_frame_extra_info (fi)->framesize; |
b0c6b05c | 593 | deprecated_update_frame_base_hack (fi, sp); |
0c884e17 CV |
594 | } |
595 | else | |
596 | { | |
1b1d3794 | 597 | deprecated_get_frame_saved_regs (fi)[E_SP_REGNUM] = fp - get_frame_extra_info (fi)->framesize; |
b0c6b05c | 598 | deprecated_update_frame_base_hack (fi, fp); |
0c884e17 CV |
599 | } |
600 | ||
601 | /* So far only offsets to the beginning of the frame are | |
602 | saved in the saved_regs. Now we now the relation between | |
603 | sp, fp and framesize. We know the beginning of the frame | |
604 | so we can translate the register offsets to real addresses. */ | |
605 | for (regnum = 0; regnum < E_SP_REGNUM; ++regnum) | |
1b1d3794 AC |
606 | if (deprecated_get_frame_saved_regs (fi)[regnum]) |
607 | deprecated_get_frame_saved_regs (fi)[regnum] += deprecated_get_frame_saved_regs (fi)[E_SP_REGNUM]; | |
0c884e17 CV |
608 | |
609 | /* Save address of PC on stack. */ | |
1b1d3794 | 610 | deprecated_get_frame_saved_regs (fi)[E_PC_REGNUM] = deprecated_get_frame_saved_regs (fi)[E_SP_REGNUM]; |
0c884e17 CV |
611 | } |
612 | ||
613 | return next_addr; | |
614 | } | |
615 | ||
616 | /* Function: xstormy16_skip_prologue | |
617 | If the input address is in a function prologue, | |
618 | returns the address of the end of the prologue; | |
619 | else returns the input address. | |
620 | ||
621 | Note: the input address is likely to be the function start, | |
622 | since this function is mainly used for advancing a breakpoint | |
623 | to the first line, or stepping to the first line when we have | |
624 | stepped into a function call. */ | |
625 | ||
626 | static CORE_ADDR | |
627 | xstormy16_skip_prologue (CORE_ADDR pc) | |
628 | { | |
629 | CORE_ADDR func_addr = 0, func_end = 0; | |
630 | char *func_name; | |
631 | ||
632 | if (find_pc_partial_function (pc, &func_name, &func_addr, &func_end)) | |
633 | { | |
634 | struct symtab_and_line sal; | |
635 | struct symbol *sym; | |
636 | ||
211a4f69 CV |
637 | /* Don't trust line number debug info in frameless functions. */ |
638 | int frameless = 1; | |
639 | CORE_ADDR plg_end = xstormy16_scan_prologue (func_addr, func_end, | |
640 | NULL, &frameless); | |
641 | if (frameless) | |
642 | return plg_end; | |
643 | ||
0c884e17 | 644 | /* Found a function. */ |
176620f1 | 645 | sym = lookup_symbol (func_name, NULL, VAR_DOMAIN, NULL, NULL); |
211a4f69 | 646 | /* Don't use line number debug info for assembly source files. */ |
0c884e17 CV |
647 | if (sym && SYMBOL_LANGUAGE (sym) != language_asm) |
648 | { | |
0c884e17 CV |
649 | sal = find_pc_line (func_addr, 0); |
650 | if (sal.end && sal.end < func_end) | |
651 | { | |
652 | /* Found a line number, use it as end of prologue. */ | |
653 | return sal.end; | |
654 | } | |
655 | } | |
211a4f69 CV |
656 | /* No useable line symbol. Use result of prologue parsing method. */ |
657 | return plg_end; | |
0c884e17 CV |
658 | } |
659 | ||
660 | /* No function symbol -- just return the PC. */ | |
661 | ||
662 | return (CORE_ADDR) pc; | |
663 | } | |
664 | ||
665 | /* The epilogue is defined here as the area at the end of a function, | |
666 | either on the `ret' instruction itself or after an instruction which | |
667 | destroys the function's stack frame. */ | |
668 | static int | |
669 | xstormy16_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) | |
670 | { | |
671 | CORE_ADDR addr, func_addr = 0, func_end = 0; | |
672 | ||
673 | if (find_pc_partial_function (pc, NULL, &func_addr, &func_end)) | |
674 | { | |
675 | ULONGEST inst, inst2; | |
676 | CORE_ADDR addr = func_end - xstormy16_inst_size; | |
677 | ||
678 | /* The Xstormy16 epilogue is max. 14 bytes long. */ | |
679 | if (pc < func_end - 7 * xstormy16_inst_size) | |
680 | return 0; | |
681 | ||
682 | /* Check if we're on a `ret' instruction. Otherwise it's | |
683 | too dangerous to proceed. */ | |
684 | inst = read_memory_unsigned_integer (addr, xstormy16_inst_size); | |
685 | if (inst != 0x0003) | |
686 | return 0; | |
687 | ||
688 | while ((addr -= xstormy16_inst_size) >= func_addr) | |
689 | { | |
690 | inst = read_memory_unsigned_integer (addr, xstormy16_inst_size); | |
691 | if (inst >= 0x009a && inst <= 0x009d) /* pop r10...r13 */ | |
692 | continue; | |
693 | if (inst == 0x305f || inst == 0x307f) /* dec r15, #0x1/#0x3 */ | |
694 | break; | |
695 | inst2 = read_memory_unsigned_integer (addr - xstormy16_inst_size, | |
696 | xstormy16_inst_size); | |
697 | if (inst2 == 0x314f && inst >= 0x8000) /* add r15, neg. value */ | |
698 | { | |
699 | addr -= xstormy16_inst_size; | |
700 | break; | |
701 | } | |
702 | return 0; | |
703 | } | |
704 | if (pc > addr) | |
705 | return 1; | |
706 | } | |
707 | return 0; | |
708 | } | |
709 | ||
710 | /* Function: xstormy16_frame_init_saved_regs | |
711 | Set up the 'saved_regs' array. | |
712 | This is a data structure containing the addresses on the stack | |
713 | where each register has been saved, for each stack frame. | |
714 | Registers that have not been saved will have zero here. | |
715 | The stack register is special: rather than the address where the | |
716 | stack register has been saved, saved_regs[SP_REGNUM] will have the | |
717 | actual value of the previous frame's stack register. | |
718 | ||
719 | This function may be called in any context where the saved register | |
ac2adee5 AC |
720 | values may be needed (backtrace, frame_info, frame_register). On |
721 | many targets, it is called directly by init_extra_frame_info, in | |
722 | part because the information may be needed immediately by | |
723 | frame_chain. */ | |
0c884e17 CV |
724 | |
725 | static void | |
726 | xstormy16_frame_init_saved_regs (struct frame_info *fi) | |
727 | { | |
728 | CORE_ADDR func_addr, func_end; | |
729 | ||
1b1d3794 | 730 | if (!deprecated_get_frame_saved_regs (fi)) |
0c884e17 CV |
731 | { |
732 | frame_saved_regs_zalloc (fi); | |
733 | ||
734 | /* Find the beginning of this function, so we can analyze its | |
735 | prologue. */ | |
50abf9e5 AC |
736 | if (find_pc_partial_function (get_frame_pc (fi), NULL, &func_addr, &func_end)) |
737 | xstormy16_scan_prologue (func_addr, get_frame_pc (fi), fi, NULL); | |
0c884e17 CV |
738 | /* Else we're out of luck (can't debug completely stripped code). |
739 | FIXME. */ | |
740 | } | |
741 | } | |
742 | ||
743 | /* Function: xstormy16_frame_saved_pc | |
744 | Returns the return address for the selected frame. | |
e6ba3bc9 AC |
745 | Called by frame_info, legacy_frame_chain_valid, and sometimes by |
746 | get_prev_frame. */ | |
0c884e17 CV |
747 | |
748 | static CORE_ADDR | |
749 | xstormy16_frame_saved_pc (struct frame_info *fi) | |
750 | { | |
751 | CORE_ADDR saved_pc; | |
752 | ||
1e2330ba AC |
753 | if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (fi), get_frame_base (fi), |
754 | get_frame_base (fi))) | |
0c884e17 | 755 | { |
1e2330ba AC |
756 | saved_pc = deprecated_read_register_dummy (get_frame_pc (fi), |
757 | get_frame_base (fi), | |
135c175f | 758 | E_PC_REGNUM); |
0c884e17 CV |
759 | } |
760 | else | |
761 | { | |
1b1d3794 | 762 | saved_pc = read_memory_unsigned_integer (deprecated_get_frame_saved_regs (fi)[E_PC_REGNUM], |
0c884e17 CV |
763 | xstormy16_pc_size); |
764 | } | |
765 | ||
766 | return saved_pc; | |
767 | } | |
768 | ||
769 | /* Function: xstormy16_init_extra_frame_info | |
770 | This is the constructor function for the frame_info struct, | |
771 | called whenever a new frame_info is created (from create_new_frame, | |
772 | and from get_prev_frame). | |
773 | */ | |
774 | ||
775 | static void | |
776 | xstormy16_init_extra_frame_info (int fromleaf, struct frame_info *fi) | |
777 | { | |
da50a4b7 | 778 | if (!get_frame_extra_info (fi)) |
0c884e17 | 779 | { |
a00a19e9 | 780 | frame_extra_info_zalloc (fi, sizeof (struct frame_extra_info)); |
da50a4b7 AC |
781 | get_frame_extra_info (fi)->framesize = 0; |
782 | get_frame_extra_info (fi)->frameless_p = 1; /* Default frameless, detect framed */ | |
0c884e17 CV |
783 | |
784 | /* By default, the fi->frame is set to the value of the FP reg by gdb. | |
785 | This may not always be right; we may be in a frameless function, | |
786 | or we may be in the prologue, before the FP has been set up. | |
787 | Unfortunately, we can't make this determination without first | |
788 | calling scan_prologue, and we can't do that unles we know the | |
50abf9e5 | 789 | get_frame_pc (fi). */ |
0c884e17 | 790 | |
50abf9e5 | 791 | if (!get_frame_pc (fi)) |
0c884e17 CV |
792 | { |
793 | /* Sometimes we are called from get_prev_frame without | |
794 | the PC being set up first. Long history, don't ask. | |
795 | Fortunately this will never happen from the outermost | |
796 | frame, so we should be able to get the saved pc from | |
797 | the next frame. */ | |
11c02a10 AC |
798 | if (get_next_frame (fi)) |
799 | deprecated_update_frame_pc_hack (fi, xstormy16_frame_saved_pc (get_next_frame (fi))); | |
0c884e17 CV |
800 | } |
801 | ||
802 | /* Take care of the saved_regs right here (non-lazy). */ | |
803 | xstormy16_frame_init_saved_regs (fi); | |
804 | } | |
805 | } | |
806 | ||
807 | /* Function: xstormy16_frame_chain | |
808 | Returns a pointer to the stack frame of the calling function. | |
809 | Called only from get_prev_frame. Needed for backtrace, "up", etc. | |
810 | */ | |
811 | ||
812 | static CORE_ADDR | |
813 | xstormy16_frame_chain (struct frame_info *fi) | |
814 | { | |
1e2330ba AC |
815 | if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (fi), get_frame_base (fi), |
816 | get_frame_base (fi))) | |
0c884e17 CV |
817 | { |
818 | /* Call dummy's frame is the same as caller's. */ | |
1e2330ba | 819 | return get_frame_base (fi); |
0c884e17 CV |
820 | } |
821 | else | |
822 | { | |
823 | /* Return computed offset from this frame's fp. */ | |
da50a4b7 | 824 | return get_frame_base (fi) - get_frame_extra_info (fi)->framesize; |
0c884e17 CV |
825 | } |
826 | } | |
827 | ||
828 | static int | |
829 | xstormy16_frame_chain_valid (CORE_ADDR chain, struct frame_info *thisframe) | |
830 | { | |
8bedc050 | 831 | return chain < 0x8000 && DEPRECATED_FRAME_SAVED_PC (thisframe) >= 0x8000 && |
da50a4b7 AC |
832 | (get_frame_extra_info (thisframe)->frameless_p || |
833 | get_frame_base (thisframe) - get_frame_extra_info (thisframe)->framesize == chain); | |
0c884e17 CV |
834 | } |
835 | ||
ac2adee5 AC |
836 | /* Function: xstormy16_saved_pc_after_call Returns the previous PC |
837 | immediately after a function call. This function is meant to | |
838 | bypass the regular frame_register() mechanism, ie. it is meant to | |
839 | work even if the frame isn't complete. Called by | |
840 | step_over_function, and sometimes by get_prev_frame. */ | |
0c884e17 CV |
841 | |
842 | static CORE_ADDR | |
843 | xstormy16_saved_pc_after_call (struct frame_info *ignore) | |
844 | { | |
845 | CORE_ADDR sp, pc, tmp; | |
846 | ||
847 | sp = read_register (E_SP_REGNUM) - xstormy16_pc_size; | |
848 | pc = read_memory_integer (sp, xstormy16_pc_size); | |
849 | ||
850 | /* Skip over jump table entry if necessary. */ | |
851 | if ((tmp = SKIP_TRAMPOLINE_CODE (pc))) | |
852 | pc = tmp; | |
853 | ||
854 | return pc; | |
855 | } | |
856 | ||
f4f9705a | 857 | const static unsigned char * |
0c884e17 CV |
858 | xstormy16_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr) |
859 | { | |
860 | static unsigned char breakpoint[] = { 0x06, 0x0 }; | |
861 | *lenptr = sizeof (breakpoint); | |
862 | return breakpoint; | |
863 | } | |
864 | ||
865 | /* Given a pointer to a jump table entry, return the address | |
866 | of the function it jumps to. Return 0 if not found. */ | |
867 | static CORE_ADDR | |
868 | xstormy16_resolve_jmp_table_entry (CORE_ADDR faddr) | |
869 | { | |
870 | struct obj_section *faddr_sect = find_pc_section (faddr); | |
871 | ||
872 | if (faddr_sect) | |
873 | { | |
874 | LONGEST inst, inst2, addr; | |
875 | char buf[2 * xstormy16_inst_size]; | |
876 | ||
877 | /* Return faddr if it's not pointing into the jump table. */ | |
878 | if (strcmp (faddr_sect->the_bfd_section->name, ".plt")) | |
879 | return faddr; | |
880 | ||
881 | if (!target_read_memory (faddr, buf, sizeof buf)) | |
882 | { | |
883 | inst = extract_unsigned_integer (buf, xstormy16_inst_size); | |
884 | inst2 = extract_unsigned_integer (buf + xstormy16_inst_size, | |
885 | xstormy16_inst_size); | |
886 | addr = inst2 << 8 | (inst & 0xff); | |
887 | return addr; | |
888 | } | |
889 | } | |
890 | return 0; | |
891 | } | |
892 | ||
893 | /* Given a function's address, attempt to find (and return) the | |
894 | address of the corresponding jump table entry. Return 0 if | |
895 | not found. */ | |
896 | static CORE_ADDR | |
897 | xstormy16_find_jmp_table_entry (CORE_ADDR faddr) | |
898 | { | |
899 | struct obj_section *faddr_sect = find_pc_section (faddr); | |
900 | ||
901 | if (faddr_sect) | |
902 | { | |
903 | struct obj_section *osect; | |
904 | ||
905 | /* Return faddr if it's already a pointer to a jump table entry. */ | |
906 | if (!strcmp (faddr_sect->the_bfd_section->name, ".plt")) | |
907 | return faddr; | |
908 | ||
909 | ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect) | |
910 | { | |
911 | if (!strcmp (osect->the_bfd_section->name, ".plt")) | |
912 | break; | |
913 | } | |
914 | ||
915 | if (osect < faddr_sect->objfile->sections_end) | |
916 | { | |
917 | CORE_ADDR addr; | |
918 | for (addr = osect->addr; | |
919 | addr < osect->endaddr; addr += 2 * xstormy16_inst_size) | |
920 | { | |
921 | int status; | |
922 | LONGEST inst, inst2, faddr2; | |
923 | char buf[2 * xstormy16_inst_size]; | |
924 | ||
925 | if (target_read_memory (addr, buf, sizeof buf)) | |
926 | return 0; | |
927 | inst = extract_unsigned_integer (buf, xstormy16_inst_size); | |
928 | inst2 = extract_unsigned_integer (buf + xstormy16_inst_size, | |
929 | xstormy16_inst_size); | |
930 | faddr2 = inst2 << 8 | (inst & 0xff); | |
931 | if (faddr == faddr2) | |
932 | return addr; | |
933 | } | |
934 | } | |
935 | } | |
936 | return 0; | |
937 | } | |
938 | ||
939 | static CORE_ADDR | |
940 | xstormy16_skip_trampoline_code (CORE_ADDR pc) | |
941 | { | |
942 | int tmp = xstormy16_resolve_jmp_table_entry (pc); | |
943 | ||
944 | if (tmp && tmp != pc) | |
945 | return tmp; | |
946 | return 0; | |
947 | } | |
948 | ||
949 | static int | |
950 | xstormy16_in_solib_call_trampoline (CORE_ADDR pc, char *name) | |
951 | { | |
952 | return xstormy16_skip_trampoline_code (pc) != 0; | |
953 | } | |
954 | ||
955 | static CORE_ADDR | |
66140c26 | 956 | xstormy16_pointer_to_address (struct type *type, const void *buf) |
0c884e17 CV |
957 | { |
958 | enum type_code target = TYPE_CODE (TYPE_TARGET_TYPE (type)); | |
7c0b4a20 | 959 | CORE_ADDR addr = extract_unsigned_integer (buf, TYPE_LENGTH (type)); |
0c884e17 CV |
960 | |
961 | if (target == TYPE_CODE_FUNC || target == TYPE_CODE_METHOD) | |
962 | { | |
963 | CORE_ADDR addr2 = xstormy16_resolve_jmp_table_entry (addr); | |
964 | if (addr2) | |
965 | addr = addr2; | |
966 | } | |
967 | ||
968 | return addr; | |
969 | } | |
970 | ||
971 | static void | |
972 | xstormy16_address_to_pointer (struct type *type, void *buf, CORE_ADDR addr) | |
973 | { | |
974 | enum type_code target = TYPE_CODE (TYPE_TARGET_TYPE (type)); | |
975 | ||
976 | if (target == TYPE_CODE_FUNC || target == TYPE_CODE_METHOD) | |
977 | { | |
978 | CORE_ADDR addr2 = xstormy16_find_jmp_table_entry (addr); | |
979 | if (addr2) | |
980 | addr = addr2; | |
981 | } | |
fbd9dcd3 | 982 | store_unsigned_integer (buf, TYPE_LENGTH (type), addr); |
0c884e17 CV |
983 | } |
984 | ||
985 | static CORE_ADDR | |
986 | xstormy16_stack_align (CORE_ADDR addr) | |
987 | { | |
988 | if (addr & 1) | |
989 | ++addr; | |
990 | return addr; | |
991 | } | |
992 | ||
a78f21af | 993 | static void |
0c884e17 CV |
994 | xstormy16_save_dummy_frame_tos (CORE_ADDR sp) |
995 | { | |
996 | generic_save_dummy_frame_tos (sp - xstormy16_pc_size); | |
997 | } | |
998 | ||
999 | /* Function: xstormy16_gdbarch_init | |
1000 | Initializer function for the xstormy16 gdbarch vector. | |
1001 | Called by gdbarch. Sets up the gdbarch vector(s) for this target. */ | |
1002 | ||
1003 | static struct gdbarch * | |
1004 | xstormy16_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) | |
1005 | { | |
1006 | static LONGEST call_dummy_words[1] = { 0 }; | |
1007 | struct gdbarch_tdep *tdep = NULL; | |
1008 | struct gdbarch *gdbarch; | |
1009 | ||
1010 | /* find a candidate among the list of pre-declared architectures. */ | |
1011 | arches = gdbarch_list_lookup_by_info (arches, &info); | |
1012 | if (arches != NULL) | |
1013 | return (arches->gdbarch); | |
1014 | ||
1015 | #if 0 | |
1016 | tdep = (struct gdbarch_tdep *) xmalloc (sizeof (struct gdbarch_tdep)); | |
1017 | #endif | |
1018 | ||
1019 | gdbarch = gdbarch_alloc (&info, 0); | |
1020 | ||
a5afb99f AC |
1021 | /* NOTE: cagney/2002-12-06: This can be deleted when this arch is |
1022 | ready to unwind the PC first (see frame.c:get_prev_frame()). */ | |
0968aa8c | 1023 | set_gdbarch_deprecated_init_frame_pc (gdbarch, deprecated_init_frame_pc_default); |
a5afb99f | 1024 | |
0c884e17 CV |
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); | |
0ba6dca9 | 1032 | set_gdbarch_deprecated_fp_regnum (gdbarch, E_FP_REGNUM); |
0c884e17 CV |
1033 | set_gdbarch_pc_regnum (gdbarch, E_PC_REGNUM); |
1034 | set_gdbarch_register_name (gdbarch, xstormy16_register_name); | |
b1e29e33 | 1035 | set_gdbarch_deprecated_register_size (gdbarch, xstormy16_reg_size); |
b8b527c5 | 1036 | set_gdbarch_deprecated_register_bytes (gdbarch, E_ALL_REGS_SIZE); |
9c04cab7 AC |
1037 | set_gdbarch_deprecated_register_byte (gdbarch, xstormy16_register_byte); |
1038 | set_gdbarch_deprecated_register_raw_size (gdbarch, xstormy16_register_raw_size); | |
a0ed5532 | 1039 | set_gdbarch_deprecated_max_register_raw_size (gdbarch, xstormy16_pc_size); |
9c04cab7 | 1040 | set_gdbarch_deprecated_register_virtual_size (gdbarch, xstormy16_register_raw_size); |
a0ed5532 | 1041 | set_gdbarch_deprecated_max_register_virtual_size (gdbarch, 4); |
9c04cab7 | 1042 | set_gdbarch_deprecated_register_virtual_type (gdbarch, xstormy16_reg_virtual_type); |
0c884e17 CV |
1043 | |
1044 | /* | |
1045 | * Frame Info | |
1046 | */ | |
e9582e71 | 1047 | set_gdbarch_deprecated_init_extra_frame_info (gdbarch, |
0c884e17 | 1048 | xstormy16_init_extra_frame_info); |
f30ee0bc | 1049 | set_gdbarch_deprecated_frame_init_saved_regs (gdbarch, |
0c884e17 | 1050 | xstormy16_frame_init_saved_regs); |
618ce49f | 1051 | set_gdbarch_deprecated_frame_chain (gdbarch, xstormy16_frame_chain); |
129c1cd6 | 1052 | set_gdbarch_deprecated_get_saved_register (gdbarch, xstormy16_get_saved_register); |
6913c89a | 1053 | set_gdbarch_deprecated_saved_pc_after_call (gdbarch, xstormy16_saved_pc_after_call); |
8bedc050 | 1054 | set_gdbarch_deprecated_frame_saved_pc (gdbarch, xstormy16_frame_saved_pc); |
0c884e17 | 1055 | set_gdbarch_skip_prologue (gdbarch, xstormy16_skip_prologue); |
618ce49f | 1056 | set_gdbarch_deprecated_frame_chain_valid (gdbarch, xstormy16_frame_chain_valid); |
0c884e17 CV |
1057 | |
1058 | set_gdbarch_in_function_epilogue_p (gdbarch, | |
1059 | xstormy16_in_function_epilogue_p); | |
1060 | ||
1061 | /* | |
1062 | * Miscelany | |
1063 | */ | |
1064 | /* Stack grows up. */ | |
1065 | set_gdbarch_inner_than (gdbarch, core_addr_greaterthan); | |
0c884e17 | 1066 | /* This value is almost never non-zero... */ |
0c884e17 | 1067 | set_gdbarch_frame_args_skip (gdbarch, 0); |
0c884e17 | 1068 | |
0c884e17 CV |
1069 | /* |
1070 | * Call Dummies | |
1071 | * | |
1072 | * These values and methods are used when gdb calls a target function. */ | |
28f617b3 | 1073 | set_gdbarch_deprecated_push_return_address (gdbarch, xstormy16_push_return_address); |
26e9b323 | 1074 | set_gdbarch_deprecated_extract_return_value (gdbarch, xstormy16_extract_return_value); |
b81774d8 | 1075 | set_gdbarch_deprecated_push_arguments (gdbarch, xstormy16_push_arguments); |
749b82f6 | 1076 | set_gdbarch_deprecated_pop_frame (gdbarch, xstormy16_pop_frame); |
4183d812 | 1077 | set_gdbarch_deprecated_store_struct_return (gdbarch, xstormy16_store_struct_return); |
ebba8386 | 1078 | set_gdbarch_deprecated_store_return_value (gdbarch, xstormy16_store_return_value); |
07be497a | 1079 | set_gdbarch_extract_struct_value_address (gdbarch, xstormy16_extract_struct_value_address); |
0c884e17 CV |
1080 | set_gdbarch_use_struct_convention (gdbarch, |
1081 | xstormy16_use_struct_convention); | |
b1e29e33 AC |
1082 | set_gdbarch_deprecated_call_dummy_words (gdbarch, call_dummy_words); |
1083 | set_gdbarch_deprecated_sizeof_call_dummy_words (gdbarch, 0); | |
0c884e17 CV |
1084 | set_gdbarch_breakpoint_from_pc (gdbarch, xstormy16_breakpoint_from_pc); |
1085 | ||
71c08af0 | 1086 | set_gdbarch_char_signed (gdbarch, 0); |
0c884e17 CV |
1087 | set_gdbarch_int_bit (gdbarch, 2 * TARGET_CHAR_BIT); |
1088 | set_gdbarch_ptr_bit (gdbarch, 2 * TARGET_CHAR_BIT); | |
1089 | set_gdbarch_addr_bit (gdbarch, 4 * TARGET_CHAR_BIT); | |
1090 | set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT); | |
1091 | ||
1092 | set_gdbarch_address_to_pointer (gdbarch, xstormy16_address_to_pointer); | |
1093 | set_gdbarch_pointer_to_address (gdbarch, xstormy16_pointer_to_address); | |
1094 | ||
f27dd7fd | 1095 | set_gdbarch_deprecated_stack_align (gdbarch, xstormy16_stack_align); |
0c884e17 | 1096 | |
a59fe496 | 1097 | set_gdbarch_deprecated_save_dummy_frame_tos (gdbarch, xstormy16_save_dummy_frame_tos); |
0c884e17 CV |
1098 | |
1099 | set_gdbarch_skip_trampoline_code (gdbarch, xstormy16_skip_trampoline_code); | |
1100 | ||
1101 | set_gdbarch_in_solib_call_trampoline (gdbarch, | |
1102 | xstormy16_in_solib_call_trampoline); | |
1103 | ||
6c0e89ed | 1104 | /* Should be using push_dummy_call. */ |
b46e02f6 | 1105 | set_gdbarch_deprecated_dummy_write_sp (gdbarch, deprecated_write_sp); |
6c0e89ed | 1106 | |
36482093 AC |
1107 | set_gdbarch_print_insn (gdbarch, print_insn_xstormy16); |
1108 | ||
0c884e17 CV |
1109 | return gdbarch; |
1110 | } | |
1111 | ||
1112 | /* Function: _initialize_xstormy16_tdep | |
1113 | Initializer function for the Sanyo Xstormy16a module. | |
1114 | Called by gdb at start-up. */ | |
1115 | ||
a78f21af AC |
1116 | extern initialize_file_ftype _initialize_xstormy16_tdep; /* -Wmissing-prototypes */ |
1117 | ||
0c884e17 CV |
1118 | void |
1119 | _initialize_xstormy16_tdep (void) | |
1120 | { | |
0c884e17 | 1121 | register_gdbarch_init (bfd_arch_xstormy16, xstormy16_gdbarch_init); |
0c884e17 | 1122 | } |