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" | |
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 | |
80bb239e AC |
170 | Find a register's saved value on the call stack. |
171 | ||
172 | Find register number REGNUM relative to FRAME and put its (raw, | |
173 | target format) contents in *RAW_BUFFER. | |
174 | ||
175 | Set *OPTIMIZED if the variable was optimized out (and thus can't be | |
176 | fetched). Note that this is never set to anything other than zero | |
177 | in this implementation. | |
178 | ||
179 | Set *LVAL to lval_memory, lval_register, or not_lval, depending on | |
180 | whether the value was fetched from memory, from a register, or in a | |
181 | strange and non-modifiable way (e.g. a frame pointer which was | |
182 | calculated rather than fetched). We will use not_lval for values | |
183 | fetched from generic dummy frames. | |
184 | ||
185 | Set *ADDRP to the address, either in memory or as a | |
186 | DEPRECATED_REGISTER_BYTE offset into the registers array. If the | |
187 | value is stored in a dummy frame, set *ADDRP to zero. | |
188 | ||
189 | The argument RAW_BUFFER must point to aligned memory. | |
190 | ||
191 | The GET_SAVED_REGISTER architecture interface is entirely | |
192 | redundant. New architectures should implement per-frame unwinders | |
193 | (ref "frame-unwind.h"). */ | |
0c884e17 CV |
194 | |
195 | static void | |
80bb239e | 196 | xstormy16_get_saved_register (char *raw_buffer, int *optimized, |
0c884e17 | 197 | CORE_ADDR *addrp, |
80bb239e AC |
198 | struct frame_info *frame, int regnum, |
199 | enum lval_type *lval) | |
0c884e17 | 200 | { |
80bb239e AC |
201 | if (!target_has_registers) |
202 | error ("No registers."); | |
203 | ||
204 | /* Normal systems don't optimize out things with register numbers. */ | |
205 | if (optimized != NULL) | |
206 | *optimized = 0; | |
207 | ||
208 | if (addrp) /* default assumption: not found in memory */ | |
209 | *addrp = 0; | |
210 | ||
211 | /* Note: since the current frame's registers could only have been | |
212 | saved by frames INTERIOR TO the current frame, we skip examining | |
213 | the current frame itself: otherwise, we would be getting the | |
214 | previous frame's registers which were saved by the current frame. */ | |
215 | ||
216 | if (frame != NULL) | |
217 | { | |
218 | for (frame = get_next_frame (frame); | |
219 | get_frame_type (frame) != SENTINEL_FRAME; | |
220 | frame = get_next_frame (frame)) | |
221 | { | |
222 | if (get_frame_type (frame) == DUMMY_FRAME) | |
223 | { | |
224 | if (lval) /* found it in a CALL_DUMMY frame */ | |
225 | *lval = not_lval; | |
226 | if (raw_buffer) | |
227 | { | |
228 | LONGEST val; | |
229 | /* FIXME: cagney/2002-06-26: This should be via the | |
230 | gdbarch_register_read() method so that it, on the | |
231 | fly, constructs either a raw or pseudo register | |
232 | from the raw register cache. */ | |
233 | val = deprecated_read_register_dummy (get_frame_pc (frame), | |
234 | get_frame_base (frame), | |
235 | regnum); | |
236 | store_unsigned_integer (raw_buffer, | |
3acba339 | 237 | register_size (current_gdbarch, regnum), |
80bb239e AC |
238 | val); |
239 | } | |
240 | return; | |
241 | } | |
242 | ||
243 | DEPRECATED_FRAME_INIT_SAVED_REGS (frame); | |
244 | if (deprecated_get_frame_saved_regs (frame) != NULL | |
245 | && deprecated_get_frame_saved_regs (frame)[regnum] != 0) | |
246 | { | |
247 | if (lval) /* found it saved on the stack */ | |
248 | *lval = lval_memory; | |
249 | if (regnum == SP_REGNUM) | |
250 | { | |
251 | if (raw_buffer) /* SP register treated specially */ | |
252 | /* NOTE: cagney/2003-05-09: In-line store_address() | |
253 | with it's body - store_unsigned_integer(). */ | |
254 | store_unsigned_integer (raw_buffer, | |
3acba339 | 255 | register_size (current_gdbarch, regnum), |
80bb239e AC |
256 | deprecated_get_frame_saved_regs (frame)[regnum]); |
257 | } | |
258 | else | |
259 | { | |
260 | if (addrp) /* any other register */ | |
261 | *addrp = deprecated_get_frame_saved_regs (frame)[regnum]; | |
262 | if (raw_buffer) | |
263 | read_memory (deprecated_get_frame_saved_regs (frame)[regnum], raw_buffer, | |
3acba339 | 264 | register_size (current_gdbarch, regnum)); |
80bb239e AC |
265 | } |
266 | return; | |
267 | } | |
268 | } | |
269 | } | |
270 | ||
271 | /* If we get thru the loop to this point, it means the register was | |
272 | not saved in any frame. Return the actual live-register value. */ | |
273 | ||
274 | if (lval) /* found it in a live register */ | |
275 | *lval = lval_register; | |
276 | if (addrp) | |
277 | *addrp = DEPRECATED_REGISTER_BYTE (regnum); | |
278 | if (raw_buffer) | |
279 | deprecated_read_register_gen (regnum, raw_buffer); | |
0c884e17 CV |
280 | } |
281 | ||
282 | /* Function: xstormy16_type_is_scalar | |
283 | Makes the decision if a given type is a scalar types. Scalar | |
284 | types are returned in the registers r2-r7 as they fit. */ | |
285 | ||
286 | static int | |
287 | xstormy16_type_is_scalar (struct type *t) | |
288 | { | |
289 | return (TYPE_CODE(t) != TYPE_CODE_STRUCT | |
290 | && TYPE_CODE(t) != TYPE_CODE_UNION | |
291 | && TYPE_CODE(t) != TYPE_CODE_ARRAY); | |
292 | } | |
293 | ||
294 | /* Function: xstormy16_extract_return_value | |
295 | Copy the function's return value into VALBUF. | |
296 | This function is called only in the context of "target function calls", | |
297 | ie. when the debugger forces a function to be called in the child, and | |
298 | when the debugger forces a function to return prematurely via the | |
299 | "return" command. */ | |
300 | ||
301 | static void | |
302 | xstormy16_extract_return_value (struct type *type, char *regbuf, char *valbuf) | |
303 | { | |
304 | CORE_ADDR return_buffer; | |
305 | int offset = 0; | |
306 | ||
307 | if (xstormy16_type_is_scalar (type) | |
308 | && TYPE_LENGTH (type) <= E_MAX_RETTYPE_SIZE_IN_REGS) | |
309 | { | |
310 | /* Scalar return values of <= 12 bytes are returned in | |
311 | E_1ST_ARG_REGNUM to E_LST_ARG_REGNUM. */ | |
312 | memcpy (valbuf, | |
62700349 | 313 | ®buf[DEPRECATED_REGISTER_BYTE (E_1ST_ARG_REGNUM)] + offset, |
0c884e17 CV |
314 | TYPE_LENGTH (type)); |
315 | } | |
316 | else | |
317 | { | |
318 | /* Aggregates and return values > 12 bytes are returned in memory, | |
319 | pointed to by R2. */ | |
320 | return_buffer = | |
62700349 | 321 | extract_unsigned_integer (regbuf + DEPRECATED_REGISTER_BYTE (E_PTR_RET_REGNUM), |
3acba339 | 322 | register_size (current_gdbarch, E_PTR_RET_REGNUM)); |
0c884e17 CV |
323 | |
324 | read_memory (return_buffer, valbuf, TYPE_LENGTH (type)); | |
325 | } | |
326 | } | |
327 | ||
328 | /* Function: xstormy16_push_arguments | |
329 | Setup the function arguments for GDB to call a function in the inferior. | |
330 | Called only in the context of a target function call from the debugger. | |
331 | Returns the value of the SP register after the args are pushed. | |
332 | */ | |
333 | ||
334 | static CORE_ADDR | |
335 | xstormy16_push_arguments (int nargs, struct value **args, CORE_ADDR sp, | |
336 | int struct_return, CORE_ADDR struct_addr) | |
337 | { | |
338 | CORE_ADDR stack_dest = sp; | |
339 | int argreg = E_1ST_ARG_REGNUM; | |
340 | int i, j; | |
341 | int typelen, slacklen; | |
342 | char *val; | |
343 | ||
344 | /* If struct_return is true, then the struct return address will | |
345 | consume one argument-passing register. */ | |
346 | if (struct_return) | |
347 | argreg++; | |
348 | ||
349 | /* Arguments are passed in R2-R7 as they fit. If an argument doesn't | |
350 | fit in the remaining registers we're switching over to the stack. | |
351 | No argument is put on stack partially and as soon as we switched | |
352 | over to stack no further argument is put in a register even if it | |
353 | would fit in the remaining unused registers. */ | |
354 | for (i = 0; i < nargs && argreg <= E_LST_ARG_REGNUM; i++) | |
355 | { | |
356 | typelen = TYPE_LENGTH (VALUE_ENCLOSING_TYPE (args[i])); | |
357 | if (typelen > E_MAX_RETTYPE_SIZE (argreg)) | |
358 | break; | |
359 | ||
360 | /* Put argument into registers wordwise. */ | |
361 | val = VALUE_CONTENTS (args[i]); | |
362 | for (j = 0; j < typelen; j += xstormy16_reg_size) | |
363 | write_register (argreg++, | |
364 | extract_unsigned_integer (val + j, | |
365 | typelen - j == | |
366 | 1 ? 1 : | |
367 | xstormy16_reg_size)); | |
368 | } | |
369 | ||
370 | /* Align SP */ | |
371 | if (stack_dest & 1) | |
372 | ++stack_dest; | |
373 | ||
374 | /* Loop backwards through remaining arguments and push them on the stack, | |
375 | wordaligned. */ | |
376 | for (j = nargs - 1; j >= i; j--) | |
377 | { | |
378 | typelen = TYPE_LENGTH (VALUE_ENCLOSING_TYPE (args[j])); | |
379 | slacklen = typelen & 1; | |
380 | val = alloca (typelen + slacklen); | |
381 | memcpy (val, VALUE_CONTENTS (args[j]), typelen); | |
382 | memset (val + typelen, 0, slacklen); | |
383 | ||
384 | /* Now write this data to the stack. The stack grows upwards. */ | |
385 | write_memory (stack_dest, val, typelen + slacklen); | |
386 | stack_dest += typelen + slacklen; | |
387 | } | |
388 | ||
389 | /* And that should do it. Return the new stack pointer. */ | |
390 | return stack_dest; | |
391 | } | |
392 | ||
393 | /* Function: xstormy16_push_return_address (pc) | |
394 | Setup the return address for GDB to call a function in the inferior. | |
395 | Called only in the context of a target function call from the debugger. | |
396 | Returns the value of the SP register when the operation is finished | |
397 | (which may or may not be the same as before). | |
398 | */ | |
399 | ||
a78f21af | 400 | static CORE_ADDR |
0c884e17 CV |
401 | xstormy16_push_return_address (CORE_ADDR pc, CORE_ADDR sp) |
402 | { | |
403 | unsigned char buf[xstormy16_pc_size]; | |
404 | ||
88a82a65 | 405 | store_unsigned_integer (buf, xstormy16_pc_size, entry_point_address ()); |
0c884e17 CV |
406 | write_memory (sp, buf, xstormy16_pc_size); |
407 | return sp + xstormy16_pc_size; | |
408 | } | |
409 | ||
410 | /* Function: xstormy16_pop_frame | |
411 | Destroy the innermost (Top-Of-Stack) stack frame, restoring the | |
412 | machine state that was in effect before the frame was created. | |
413 | Used in the contexts of the "return" command, and of | |
414 | target function calls from the debugger. | |
415 | */ | |
416 | ||
417 | static void | |
418 | xstormy16_pop_frame (void) | |
419 | { | |
420 | struct frame_info *fi = get_current_frame (); | |
421 | int i; | |
422 | ||
423 | if (fi == NULL) | |
424 | return; /* paranoia */ | |
425 | ||
30a4a8e0 | 426 | if (deprecated_pc_in_call_dummy (get_frame_pc (fi))) |
0c884e17 | 427 | { |
8adf9e78 | 428 | deprecated_pop_dummy_frame (); |
0c884e17 CV |
429 | } |
430 | else | |
431 | { | |
432 | /* Restore the saved regs. */ | |
433 | for (i = 0; i < NUM_REGS; i++) | |
1b1d3794 | 434 | if (deprecated_get_frame_saved_regs (fi)[i]) |
0c884e17 CV |
435 | { |
436 | if (i == SP_REGNUM) | |
1b1d3794 | 437 | write_register (i, deprecated_get_frame_saved_regs (fi)[i]); |
0c884e17 | 438 | else if (i == E_PC_REGNUM) |
1b1d3794 | 439 | write_register (i, read_memory_integer (deprecated_get_frame_saved_regs (fi)[i], |
0c884e17 CV |
440 | xstormy16_pc_size)); |
441 | else | |
1b1d3794 | 442 | write_register (i, read_memory_integer (deprecated_get_frame_saved_regs (fi)[i], |
0c884e17 CV |
443 | xstormy16_reg_size)); |
444 | } | |
445 | /* Restore the PC */ | |
8bedc050 | 446 | write_register (PC_REGNUM, DEPRECATED_FRAME_SAVED_PC (fi)); |
0c884e17 CV |
447 | flush_cached_frames (); |
448 | } | |
449 | return; | |
450 | } | |
451 | ||
452 | /* Function: xstormy16_store_struct_return | |
453 | Copy the (struct) function return value to its destined location. | |
454 | Called only in the context of a target function call from the debugger. | |
455 | */ | |
456 | ||
457 | static void | |
458 | xstormy16_store_struct_return (CORE_ADDR addr, CORE_ADDR sp) | |
459 | { | |
460 | write_register (E_PTR_RET_REGNUM, addr); | |
461 | } | |
462 | ||
463 | /* Function: xstormy16_store_return_value | |
464 | Copy the function return value from VALBUF into the | |
465 | proper location for a function return. | |
466 | Called only in the context of the "return" command. | |
467 | */ | |
468 | ||
469 | static void | |
470 | xstormy16_store_return_value (struct type *type, char *valbuf) | |
471 | { | |
472 | CORE_ADDR return_buffer; | |
473 | char buf[xstormy16_reg_size]; | |
474 | ||
475 | if (xstormy16_type_is_scalar (type) && TYPE_LENGTH (type) == 1) | |
476 | { | |
477 | /* Add leading zeros to the value. */ | |
478 | memset (buf, 0, xstormy16_reg_size); | |
479 | memcpy (buf, valbuf, 1); | |
4caf0990 | 480 | deprecated_write_register_gen (E_1ST_ARG_REGNUM, buf); |
0c884e17 CV |
481 | } |
482 | else if (xstormy16_type_is_scalar (type) && | |
483 | TYPE_LENGTH (type) <= E_MAX_RETTYPE_SIZE_IN_REGS) | |
62700349 | 484 | deprecated_write_register_bytes (DEPRECATED_REGISTER_BYTE (E_1ST_ARG_REGNUM), |
73937e03 | 485 | valbuf, TYPE_LENGTH (type)); |
0c884e17 CV |
486 | else |
487 | { | |
488 | return_buffer = read_register (E_PTR_RET_REGNUM); | |
489 | write_memory (return_buffer, valbuf, TYPE_LENGTH (type)); | |
490 | } | |
491 | } | |
492 | ||
493 | /* Function: xstormy16_extract_struct_value_address | |
494 | Returns the address in which a function should return a struct value. | |
495 | Used in the contexts of the "return" command, and of | |
496 | target function calls from the debugger. | |
497 | */ | |
498 | ||
499 | static CORE_ADDR | |
07be497a | 500 | xstormy16_extract_struct_value_address (struct regcache *regcache) |
0c884e17 | 501 | { |
07be497a AC |
502 | /* FIXME: cagney/2004-01-17: Does the ABI guarantee that the return |
503 | address regster is preserved across function calls? Probably | |
504 | not, making this function wrong. */ | |
505 | ULONGEST val; | |
506 | regcache_raw_read_unsigned (regcache, E_PTR_RET_REGNUM, &val); | |
507 | return val; | |
0c884e17 CV |
508 | } |
509 | ||
510 | /* Function: xstormy16_use_struct_convention | |
511 | Returns non-zero if the given struct type will be returned using | |
512 | a special convention, rather than the normal function return method. | |
513 | 7sed in the contexts of the "return" command, and of | |
514 | target function calls from the debugger. | |
515 | */ | |
516 | ||
517 | static int | |
518 | xstormy16_use_struct_convention (int gcc_p, struct type *type) | |
519 | { | |
520 | return !xstormy16_type_is_scalar (type) | |
521 | || TYPE_LENGTH (type) > E_MAX_RETTYPE_SIZE_IN_REGS; | |
522 | } | |
523 | ||
524 | /* Function: frame_saved_register | |
525 | Returns the value that regnum had in frame fi | |
526 | (saved in fi or in one of its children). | |
527 | */ | |
528 | ||
529 | static CORE_ADDR | |
530 | xstormy16_frame_saved_register (struct frame_info *fi, int regnum) | |
531 | { | |
532 | int size = xstormy16_register_raw_size (regnum); | |
533 | char *buf = (char *) alloca (size); | |
534 | ||
80bb239e | 535 | xstormy16_get_saved_register (buf, NULL, NULL, fi, regnum, NULL); |
0c884e17 CV |
536 | return (CORE_ADDR) extract_unsigned_integer (buf, size); |
537 | } | |
538 | ||
539 | /* Function: xstormy16_scan_prologue | |
540 | Decode the instructions within the given address range. | |
541 | Decide when we must have reached the end of the function prologue. | |
542 | If a frame_info pointer is provided, fill in its saved_regs etc. | |
543 | ||
544 | Returns the address of the first instruction after the prologue. | |
545 | */ | |
546 | ||
547 | static CORE_ADDR | |
211a4f69 CV |
548 | xstormy16_scan_prologue (CORE_ADDR start_addr, CORE_ADDR end_addr, |
549 | struct frame_info *fi, int *frameless) | |
0c884e17 CV |
550 | { |
551 | CORE_ADDR sp = 0, fp = 0; | |
552 | CORE_ADDR next_addr; | |
553 | ULONGEST inst, inst2; | |
554 | LONGEST offset; | |
555 | int regnum; | |
556 | ||
211a4f69 CV |
557 | if (frameless) |
558 | *frameless = 1; | |
0c884e17 CV |
559 | if (fi) |
560 | { | |
561 | /* In a call dummy, don't touch the frame. */ | |
30a4a8e0 | 562 | if (deprecated_pc_in_call_dummy (get_frame_pc (fi))) |
0c884e17 CV |
563 | return start_addr; |
564 | ||
565 | /* Grab the frame-relative values of SP and FP, needed below. | |
566 | The frame_saved_register function will find them on the | |
567 | stack or in the registers as appropriate. */ | |
568 | sp = xstormy16_frame_saved_register (fi, E_SP_REGNUM); | |
569 | fp = xstormy16_frame_saved_register (fi, E_FP_REGNUM); | |
570 | ||
571 | /* Initialize framesize with size of PC put on stack by CALLF inst. */ | |
da50a4b7 | 572 | get_frame_extra_info (fi)->framesize = xstormy16_pc_size; |
0c884e17 CV |
573 | } |
574 | for (next_addr = start_addr; | |
575 | next_addr < end_addr; next_addr += xstormy16_inst_size) | |
576 | { | |
577 | inst = read_memory_unsigned_integer (next_addr, xstormy16_inst_size); | |
578 | inst2 = read_memory_unsigned_integer (next_addr + xstormy16_inst_size, | |
579 | xstormy16_inst_size); | |
580 | ||
581 | if (inst >= 0x0082 && inst <= 0x008d) /* push r2 .. push r13 */ | |
582 | { | |
583 | if (fi) | |
584 | { | |
585 | regnum = inst & 0x000f; | |
1b1d3794 | 586 | deprecated_get_frame_saved_regs (fi)[regnum] = get_frame_extra_info (fi)->framesize; |
da50a4b7 | 587 | get_frame_extra_info (fi)->framesize += xstormy16_reg_size; |
0c884e17 CV |
588 | } |
589 | } | |
590 | ||
591 | /* optional stack allocation for args and local vars <= 4 byte */ | |
592 | else if (inst == 0x301f || inst == 0x303f) /* inc r15, #0x1/#0x3 */ | |
593 | { | |
594 | if (fi) /* Record the frame size. */ | |
da50a4b7 | 595 | get_frame_extra_info (fi)->framesize += ((inst & 0x0030) >> 4) + 1; |
0c884e17 CV |
596 | } |
597 | ||
598 | /* optional stack allocation for args and local vars > 4 && < 16 byte */ | |
599 | else if ((inst & 0xff0f) == 0x510f) /* 51Hf add r15, #0xH */ | |
600 | { | |
601 | if (fi) /* Record the frame size. */ | |
da50a4b7 | 602 | get_frame_extra_info (fi)->framesize += (inst & 0x00f0) >> 4; |
0c884e17 CV |
603 | } |
604 | ||
605 | /* optional stack allocation for args and local vars >= 16 byte */ | |
606 | else if (inst == 0x314f && inst2 >= 0x0010) /* 314f HHHH add r15, #0xH */ | |
607 | { | |
608 | if (fi) /* Record the frame size. */ | |
da50a4b7 | 609 | get_frame_extra_info (fi)->framesize += inst2; |
0c884e17 CV |
610 | next_addr += xstormy16_inst_size; |
611 | } | |
612 | ||
613 | else if (inst == 0x46fd) /* mov r13, r15 */ | |
614 | { | |
615 | if (fi) /* Record that the frame pointer is in use. */ | |
da50a4b7 | 616 | get_frame_extra_info (fi)->frameless_p = 0; |
211a4f69 CV |
617 | if (frameless) |
618 | *frameless = 0; | |
0c884e17 CV |
619 | } |
620 | ||
621 | /* optional copying of args in r2-r7 to r10-r13 */ | |
622 | /* Probably only in optimized case but legal action for prologue */ | |
623 | else if ((inst & 0xff00) == 0x4600 /* 46SD mov rD, rS */ | |
624 | && (inst & 0x00f0) >= 0x0020 && (inst & 0x00f0) <= 0x0070 | |
625 | && (inst & 0x000f) >= 0x00a0 && (inst & 0x000f) <= 0x000d) | |
626 | ; | |
627 | ||
628 | /* optional copying of args in r2-r7 to stack */ | |
629 | /* 72DS HHHH mov.b (rD, 0xHHHH), r(S-8) (bit3 always 1, bit2-0 = reg) */ | |
630 | /* 73DS HHHH mov.w (rD, 0xHHHH), r(S-8) */ | |
631 | else if ((inst & 0xfed8) == 0x72d8 && (inst & 0x0007) >= 2) | |
632 | { | |
633 | if (fi) | |
634 | { | |
635 | regnum = inst & 0x0007; | |
636 | /* Only 12 of 16 bits of the argument are used for the | |
637 | signed offset. */ | |
638 | offset = (LONGEST) (inst2 & 0x0fff); | |
639 | if (offset & 0x0800) | |
640 | offset -= 0x1000; | |
641 | ||
1b1d3794 | 642 | deprecated_get_frame_saved_regs (fi)[regnum] = get_frame_extra_info (fi)->framesize + offset; |
0c884e17 CV |
643 | } |
644 | next_addr += xstormy16_inst_size; | |
645 | } | |
646 | ||
647 | #if 0 | |
648 | /* 2001-08-10: Not part of the prologue anymore due to change in | |
649 | ABI. r8 and r9 are not used for argument passing anymore. */ | |
650 | ||
651 | /* optional copying of r8, r9 to stack */ | |
652 | /* 46S7; 73Df HHHH mov.w r7,rS; mov.w (rD, 0xHHHH), r7 D=8,9; S=13,15 */ | |
653 | /* 46S7; 72df HHHH mov.w r7,rS; mov.b (rD, 0xHHHH), r7 D=8,9; S=13,15 */ | |
654 | else if ((inst & 0xffef) == 0x4687 && (inst2 & 0xfedf) == 0x72df) | |
655 | { | |
656 | next_addr += xstormy16_inst_size; | |
657 | if (fi) | |
658 | { | |
659 | regnum = (inst & 0x00f0) >> 4; | |
660 | inst = inst2; | |
661 | inst2 = read_memory_unsigned_integer (next_addr | |
662 | + xstormy16_inst_size, | |
663 | xstormy16_inst_size); | |
664 | /* Only 12 of 16 bits of the argument are used for the | |
665 | signed offset. */ | |
666 | offset = (LONGEST) (inst2 & 0x0fff); | |
667 | if (offset & 0x0800) | |
668 | offset -= 0x1000; | |
669 | ||
670 | fi->saved_regs[regnum] = fi->extra_info->framesize + offset; | |
671 | } | |
672 | next_addr += xstormy16_inst_size; | |
673 | } | |
674 | #endif | |
675 | ||
676 | else /* Not a prologue instruction. */ | |
677 | break; | |
678 | } | |
679 | ||
680 | if (fi) | |
681 | { | |
682 | /* Special handling for the "saved" address of the SP: | |
683 | The SP is of course never saved on the stack at all, so | |
684 | by convention what we put here is simply the previous | |
685 | _value_ of the SP (as opposed to an address where the | |
686 | previous value would have been pushed). */ | |
da50a4b7 | 687 | if (get_frame_extra_info (fi)->frameless_p) |
0c884e17 | 688 | { |
1b1d3794 | 689 | deprecated_get_frame_saved_regs (fi)[E_SP_REGNUM] = sp - get_frame_extra_info (fi)->framesize; |
b0c6b05c | 690 | deprecated_update_frame_base_hack (fi, sp); |
0c884e17 CV |
691 | } |
692 | else | |
693 | { | |
1b1d3794 | 694 | deprecated_get_frame_saved_regs (fi)[E_SP_REGNUM] = fp - get_frame_extra_info (fi)->framesize; |
b0c6b05c | 695 | deprecated_update_frame_base_hack (fi, fp); |
0c884e17 CV |
696 | } |
697 | ||
698 | /* So far only offsets to the beginning of the frame are | |
699 | saved in the saved_regs. Now we now the relation between | |
700 | sp, fp and framesize. We know the beginning of the frame | |
701 | so we can translate the register offsets to real addresses. */ | |
702 | for (regnum = 0; regnum < E_SP_REGNUM; ++regnum) | |
1b1d3794 AC |
703 | if (deprecated_get_frame_saved_regs (fi)[regnum]) |
704 | deprecated_get_frame_saved_regs (fi)[regnum] += deprecated_get_frame_saved_regs (fi)[E_SP_REGNUM]; | |
0c884e17 CV |
705 | |
706 | /* Save address of PC on stack. */ | |
1b1d3794 | 707 | deprecated_get_frame_saved_regs (fi)[E_PC_REGNUM] = deprecated_get_frame_saved_regs (fi)[E_SP_REGNUM]; |
0c884e17 CV |
708 | } |
709 | ||
710 | return next_addr; | |
711 | } | |
712 | ||
713 | /* Function: xstormy16_skip_prologue | |
714 | If the input address is in a function prologue, | |
715 | returns the address of the end of the prologue; | |
716 | else returns the input address. | |
717 | ||
718 | Note: the input address is likely to be the function start, | |
719 | since this function is mainly used for advancing a breakpoint | |
720 | to the first line, or stepping to the first line when we have | |
721 | stepped into a function call. */ | |
722 | ||
723 | static CORE_ADDR | |
724 | xstormy16_skip_prologue (CORE_ADDR pc) | |
725 | { | |
726 | CORE_ADDR func_addr = 0, func_end = 0; | |
727 | char *func_name; | |
728 | ||
729 | if (find_pc_partial_function (pc, &func_name, &func_addr, &func_end)) | |
730 | { | |
731 | struct symtab_and_line sal; | |
732 | struct symbol *sym; | |
733 | ||
211a4f69 CV |
734 | /* Don't trust line number debug info in frameless functions. */ |
735 | int frameless = 1; | |
736 | CORE_ADDR plg_end = xstormy16_scan_prologue (func_addr, func_end, | |
737 | NULL, &frameless); | |
738 | if (frameless) | |
739 | return plg_end; | |
740 | ||
0c884e17 | 741 | /* Found a function. */ |
176620f1 | 742 | sym = lookup_symbol (func_name, NULL, VAR_DOMAIN, NULL, NULL); |
211a4f69 | 743 | /* Don't use line number debug info for assembly source files. */ |
0c884e17 CV |
744 | if (sym && SYMBOL_LANGUAGE (sym) != language_asm) |
745 | { | |
0c884e17 CV |
746 | sal = find_pc_line (func_addr, 0); |
747 | if (sal.end && sal.end < func_end) | |
748 | { | |
749 | /* Found a line number, use it as end of prologue. */ | |
750 | return sal.end; | |
751 | } | |
752 | } | |
211a4f69 CV |
753 | /* No useable line symbol. Use result of prologue parsing method. */ |
754 | return plg_end; | |
0c884e17 CV |
755 | } |
756 | ||
757 | /* No function symbol -- just return the PC. */ | |
758 | ||
759 | return (CORE_ADDR) pc; | |
760 | } | |
761 | ||
762 | /* The epilogue is defined here as the area at the end of a function, | |
763 | either on the `ret' instruction itself or after an instruction which | |
764 | destroys the function's stack frame. */ | |
765 | static int | |
766 | xstormy16_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) | |
767 | { | |
768 | CORE_ADDR addr, func_addr = 0, func_end = 0; | |
769 | ||
770 | if (find_pc_partial_function (pc, NULL, &func_addr, &func_end)) | |
771 | { | |
772 | ULONGEST inst, inst2; | |
773 | CORE_ADDR addr = func_end - xstormy16_inst_size; | |
774 | ||
775 | /* The Xstormy16 epilogue is max. 14 bytes long. */ | |
776 | if (pc < func_end - 7 * xstormy16_inst_size) | |
777 | return 0; | |
778 | ||
779 | /* Check if we're on a `ret' instruction. Otherwise it's | |
780 | too dangerous to proceed. */ | |
781 | inst = read_memory_unsigned_integer (addr, xstormy16_inst_size); | |
782 | if (inst != 0x0003) | |
783 | return 0; | |
784 | ||
785 | while ((addr -= xstormy16_inst_size) >= func_addr) | |
786 | { | |
787 | inst = read_memory_unsigned_integer (addr, xstormy16_inst_size); | |
788 | if (inst >= 0x009a && inst <= 0x009d) /* pop r10...r13 */ | |
789 | continue; | |
790 | if (inst == 0x305f || inst == 0x307f) /* dec r15, #0x1/#0x3 */ | |
791 | break; | |
792 | inst2 = read_memory_unsigned_integer (addr - xstormy16_inst_size, | |
793 | xstormy16_inst_size); | |
794 | if (inst2 == 0x314f && inst >= 0x8000) /* add r15, neg. value */ | |
795 | { | |
796 | addr -= xstormy16_inst_size; | |
797 | break; | |
798 | } | |
799 | return 0; | |
800 | } | |
801 | if (pc > addr) | |
802 | return 1; | |
803 | } | |
804 | return 0; | |
805 | } | |
806 | ||
807 | /* Function: xstormy16_frame_init_saved_regs | |
808 | Set up the 'saved_regs' array. | |
809 | This is a data structure containing the addresses on the stack | |
810 | where each register has been saved, for each stack frame. | |
811 | Registers that have not been saved will have zero here. | |
812 | The stack register is special: rather than the address where the | |
813 | stack register has been saved, saved_regs[SP_REGNUM] will have the | |
814 | actual value of the previous frame's stack register. | |
815 | ||
816 | This function may be called in any context where the saved register | |
ac2adee5 AC |
817 | values may be needed (backtrace, frame_info, frame_register). On |
818 | many targets, it is called directly by init_extra_frame_info, in | |
819 | part because the information may be needed immediately by | |
820 | frame_chain. */ | |
0c884e17 CV |
821 | |
822 | static void | |
823 | xstormy16_frame_init_saved_regs (struct frame_info *fi) | |
824 | { | |
825 | CORE_ADDR func_addr, func_end; | |
826 | ||
1b1d3794 | 827 | if (!deprecated_get_frame_saved_regs (fi)) |
0c884e17 CV |
828 | { |
829 | frame_saved_regs_zalloc (fi); | |
830 | ||
831 | /* Find the beginning of this function, so we can analyze its | |
832 | prologue. */ | |
50abf9e5 AC |
833 | if (find_pc_partial_function (get_frame_pc (fi), NULL, &func_addr, &func_end)) |
834 | xstormy16_scan_prologue (func_addr, get_frame_pc (fi), fi, NULL); | |
0c884e17 CV |
835 | /* Else we're out of luck (can't debug completely stripped code). |
836 | FIXME. */ | |
837 | } | |
838 | } | |
839 | ||
840 | /* Function: xstormy16_frame_saved_pc | |
841 | Returns the return address for the selected frame. | |
e6ba3bc9 AC |
842 | Called by frame_info, legacy_frame_chain_valid, and sometimes by |
843 | get_prev_frame. */ | |
0c884e17 CV |
844 | |
845 | static CORE_ADDR | |
846 | xstormy16_frame_saved_pc (struct frame_info *fi) | |
847 | { | |
848 | CORE_ADDR saved_pc; | |
849 | ||
30a4a8e0 | 850 | if (deprecated_pc_in_call_dummy (get_frame_pc (fi))) |
0c884e17 | 851 | { |
1e2330ba AC |
852 | saved_pc = deprecated_read_register_dummy (get_frame_pc (fi), |
853 | get_frame_base (fi), | |
135c175f | 854 | E_PC_REGNUM); |
0c884e17 CV |
855 | } |
856 | else | |
857 | { | |
1b1d3794 | 858 | saved_pc = read_memory_unsigned_integer (deprecated_get_frame_saved_regs (fi)[E_PC_REGNUM], |
0c884e17 CV |
859 | xstormy16_pc_size); |
860 | } | |
861 | ||
862 | return saved_pc; | |
863 | } | |
864 | ||
865 | /* Function: xstormy16_init_extra_frame_info | |
866 | This is the constructor function for the frame_info struct, | |
867 | called whenever a new frame_info is created (from create_new_frame, | |
868 | and from get_prev_frame). | |
869 | */ | |
870 | ||
871 | static void | |
872 | xstormy16_init_extra_frame_info (int fromleaf, struct frame_info *fi) | |
873 | { | |
da50a4b7 | 874 | if (!get_frame_extra_info (fi)) |
0c884e17 | 875 | { |
a00a19e9 | 876 | frame_extra_info_zalloc (fi, sizeof (struct frame_extra_info)); |
da50a4b7 AC |
877 | get_frame_extra_info (fi)->framesize = 0; |
878 | get_frame_extra_info (fi)->frameless_p = 1; /* Default frameless, detect framed */ | |
0c884e17 CV |
879 | |
880 | /* By default, the fi->frame is set to the value of the FP reg by gdb. | |
881 | This may not always be right; we may be in a frameless function, | |
882 | or we may be in the prologue, before the FP has been set up. | |
883 | Unfortunately, we can't make this determination without first | |
884 | calling scan_prologue, and we can't do that unles we know the | |
50abf9e5 | 885 | get_frame_pc (fi). */ |
0c884e17 | 886 | |
50abf9e5 | 887 | if (!get_frame_pc (fi)) |
0c884e17 CV |
888 | { |
889 | /* Sometimes we are called from get_prev_frame without | |
890 | the PC being set up first. Long history, don't ask. | |
891 | Fortunately this will never happen from the outermost | |
892 | frame, so we should be able to get the saved pc from | |
893 | the next frame. */ | |
11c02a10 AC |
894 | if (get_next_frame (fi)) |
895 | deprecated_update_frame_pc_hack (fi, xstormy16_frame_saved_pc (get_next_frame (fi))); | |
0c884e17 CV |
896 | } |
897 | ||
898 | /* Take care of the saved_regs right here (non-lazy). */ | |
899 | xstormy16_frame_init_saved_regs (fi); | |
900 | } | |
901 | } | |
902 | ||
903 | /* Function: xstormy16_frame_chain | |
904 | Returns a pointer to the stack frame of the calling function. | |
905 | Called only from get_prev_frame. Needed for backtrace, "up", etc. | |
906 | */ | |
907 | ||
908 | static CORE_ADDR | |
909 | xstormy16_frame_chain (struct frame_info *fi) | |
910 | { | |
30a4a8e0 | 911 | if (deprecated_pc_in_call_dummy (get_frame_pc (fi))) |
0c884e17 CV |
912 | { |
913 | /* Call dummy's frame is the same as caller's. */ | |
1e2330ba | 914 | return get_frame_base (fi); |
0c884e17 CV |
915 | } |
916 | else | |
917 | { | |
918 | /* Return computed offset from this frame's fp. */ | |
da50a4b7 | 919 | return get_frame_base (fi) - get_frame_extra_info (fi)->framesize; |
0c884e17 CV |
920 | } |
921 | } | |
922 | ||
923 | static int | |
924 | xstormy16_frame_chain_valid (CORE_ADDR chain, struct frame_info *thisframe) | |
925 | { | |
8bedc050 | 926 | return chain < 0x8000 && DEPRECATED_FRAME_SAVED_PC (thisframe) >= 0x8000 && |
da50a4b7 AC |
927 | (get_frame_extra_info (thisframe)->frameless_p || |
928 | get_frame_base (thisframe) - get_frame_extra_info (thisframe)->framesize == chain); | |
0c884e17 CV |
929 | } |
930 | ||
ac2adee5 AC |
931 | /* Function: xstormy16_saved_pc_after_call Returns the previous PC |
932 | immediately after a function call. This function is meant to | |
933 | bypass the regular frame_register() mechanism, ie. it is meant to | |
934 | work even if the frame isn't complete. Called by | |
935 | step_over_function, and sometimes by get_prev_frame. */ | |
0c884e17 CV |
936 | |
937 | static CORE_ADDR | |
938 | xstormy16_saved_pc_after_call (struct frame_info *ignore) | |
939 | { | |
940 | CORE_ADDR sp, pc, tmp; | |
941 | ||
942 | sp = read_register (E_SP_REGNUM) - xstormy16_pc_size; | |
943 | pc = read_memory_integer (sp, xstormy16_pc_size); | |
944 | ||
945 | /* Skip over jump table entry if necessary. */ | |
946 | if ((tmp = SKIP_TRAMPOLINE_CODE (pc))) | |
947 | pc = tmp; | |
948 | ||
949 | return pc; | |
950 | } | |
951 | ||
f4f9705a | 952 | const static unsigned char * |
0c884e17 CV |
953 | xstormy16_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr) |
954 | { | |
955 | static unsigned char breakpoint[] = { 0x06, 0x0 }; | |
956 | *lenptr = sizeof (breakpoint); | |
957 | return breakpoint; | |
958 | } | |
959 | ||
960 | /* Given a pointer to a jump table entry, return the address | |
961 | of the function it jumps to. Return 0 if not found. */ | |
962 | static CORE_ADDR | |
963 | xstormy16_resolve_jmp_table_entry (CORE_ADDR faddr) | |
964 | { | |
965 | struct obj_section *faddr_sect = find_pc_section (faddr); | |
966 | ||
967 | if (faddr_sect) | |
968 | { | |
969 | LONGEST inst, inst2, addr; | |
970 | char buf[2 * xstormy16_inst_size]; | |
971 | ||
972 | /* Return faddr if it's not pointing into the jump table. */ | |
973 | if (strcmp (faddr_sect->the_bfd_section->name, ".plt")) | |
974 | return faddr; | |
975 | ||
976 | if (!target_read_memory (faddr, buf, sizeof buf)) | |
977 | { | |
978 | inst = extract_unsigned_integer (buf, xstormy16_inst_size); | |
979 | inst2 = extract_unsigned_integer (buf + xstormy16_inst_size, | |
980 | xstormy16_inst_size); | |
981 | addr = inst2 << 8 | (inst & 0xff); | |
982 | return addr; | |
983 | } | |
984 | } | |
985 | return 0; | |
986 | } | |
987 | ||
988 | /* Given a function's address, attempt to find (and return) the | |
989 | address of the corresponding jump table entry. Return 0 if | |
990 | not found. */ | |
991 | static CORE_ADDR | |
992 | xstormy16_find_jmp_table_entry (CORE_ADDR faddr) | |
993 | { | |
994 | struct obj_section *faddr_sect = find_pc_section (faddr); | |
995 | ||
996 | if (faddr_sect) | |
997 | { | |
998 | struct obj_section *osect; | |
999 | ||
1000 | /* Return faddr if it's already a pointer to a jump table entry. */ | |
1001 | if (!strcmp (faddr_sect->the_bfd_section->name, ".plt")) | |
1002 | return faddr; | |
1003 | ||
1004 | ALL_OBJFILE_OSECTIONS (faddr_sect->objfile, osect) | |
1005 | { | |
1006 | if (!strcmp (osect->the_bfd_section->name, ".plt")) | |
1007 | break; | |
1008 | } | |
1009 | ||
1010 | if (osect < faddr_sect->objfile->sections_end) | |
1011 | { | |
1012 | CORE_ADDR addr; | |
1013 | for (addr = osect->addr; | |
1014 | addr < osect->endaddr; addr += 2 * xstormy16_inst_size) | |
1015 | { | |
1016 | int status; | |
1017 | LONGEST inst, inst2, faddr2; | |
1018 | char buf[2 * xstormy16_inst_size]; | |
1019 | ||
1020 | if (target_read_memory (addr, buf, sizeof buf)) | |
1021 | return 0; | |
1022 | inst = extract_unsigned_integer (buf, xstormy16_inst_size); | |
1023 | inst2 = extract_unsigned_integer (buf + xstormy16_inst_size, | |
1024 | xstormy16_inst_size); | |
1025 | faddr2 = inst2 << 8 | (inst & 0xff); | |
1026 | if (faddr == faddr2) | |
1027 | return addr; | |
1028 | } | |
1029 | } | |
1030 | } | |
1031 | return 0; | |
1032 | } | |
1033 | ||
1034 | static CORE_ADDR | |
1035 | xstormy16_skip_trampoline_code (CORE_ADDR pc) | |
1036 | { | |
1037 | int tmp = xstormy16_resolve_jmp_table_entry (pc); | |
1038 | ||
1039 | if (tmp && tmp != pc) | |
1040 | return tmp; | |
1041 | return 0; | |
1042 | } | |
1043 | ||
1044 | static int | |
1045 | xstormy16_in_solib_call_trampoline (CORE_ADDR pc, char *name) | |
1046 | { | |
1047 | return xstormy16_skip_trampoline_code (pc) != 0; | |
1048 | } | |
1049 | ||
1050 | static CORE_ADDR | |
66140c26 | 1051 | xstormy16_pointer_to_address (struct type *type, const void *buf) |
0c884e17 CV |
1052 | { |
1053 | enum type_code target = TYPE_CODE (TYPE_TARGET_TYPE (type)); | |
7c0b4a20 | 1054 | CORE_ADDR addr = extract_unsigned_integer (buf, TYPE_LENGTH (type)); |
0c884e17 CV |
1055 | |
1056 | if (target == TYPE_CODE_FUNC || target == TYPE_CODE_METHOD) | |
1057 | { | |
1058 | CORE_ADDR addr2 = xstormy16_resolve_jmp_table_entry (addr); | |
1059 | if (addr2) | |
1060 | addr = addr2; | |
1061 | } | |
1062 | ||
1063 | return addr; | |
1064 | } | |
1065 | ||
1066 | static void | |
1067 | xstormy16_address_to_pointer (struct type *type, void *buf, CORE_ADDR addr) | |
1068 | { | |
1069 | enum type_code target = TYPE_CODE (TYPE_TARGET_TYPE (type)); | |
1070 | ||
1071 | if (target == TYPE_CODE_FUNC || target == TYPE_CODE_METHOD) | |
1072 | { | |
1073 | CORE_ADDR addr2 = xstormy16_find_jmp_table_entry (addr); | |
1074 | if (addr2) | |
1075 | addr = addr2; | |
1076 | } | |
fbd9dcd3 | 1077 | store_unsigned_integer (buf, TYPE_LENGTH (type), addr); |
0c884e17 CV |
1078 | } |
1079 | ||
1080 | static CORE_ADDR | |
1081 | xstormy16_stack_align (CORE_ADDR addr) | |
1082 | { | |
1083 | if (addr & 1) | |
1084 | ++addr; | |
1085 | return addr; | |
1086 | } | |
1087 | ||
a78f21af | 1088 | static void |
0c884e17 CV |
1089 | xstormy16_save_dummy_frame_tos (CORE_ADDR sp) |
1090 | { | |
1091 | generic_save_dummy_frame_tos (sp - xstormy16_pc_size); | |
1092 | } | |
1093 | ||
1094 | /* Function: xstormy16_gdbarch_init | |
1095 | Initializer function for the xstormy16 gdbarch vector. | |
1096 | Called by gdbarch. Sets up the gdbarch vector(s) for this target. */ | |
1097 | ||
1098 | static struct gdbarch * | |
1099 | xstormy16_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) | |
1100 | { | |
0c884e17 CV |
1101 | struct gdbarch_tdep *tdep = NULL; |
1102 | struct gdbarch *gdbarch; | |
1103 | ||
1104 | /* find a candidate among the list of pre-declared architectures. */ | |
1105 | arches = gdbarch_list_lookup_by_info (arches, &info); | |
1106 | if (arches != NULL) | |
1107 | return (arches->gdbarch); | |
1108 | ||
1109 | #if 0 | |
1110 | tdep = (struct gdbarch_tdep *) xmalloc (sizeof (struct gdbarch_tdep)); | |
1111 | #endif | |
1112 | ||
1113 | gdbarch = gdbarch_alloc (&info, 0); | |
1114 | ||
a5afb99f AC |
1115 | /* NOTE: cagney/2002-12-06: This can be deleted when this arch is |
1116 | ready to unwind the PC first (see frame.c:get_prev_frame()). */ | |
0968aa8c | 1117 | set_gdbarch_deprecated_init_frame_pc (gdbarch, deprecated_init_frame_pc_default); |
a5afb99f | 1118 | |
0c884e17 CV |
1119 | /* |
1120 | * Basic register fields and methods. | |
1121 | */ | |
1122 | ||
1123 | set_gdbarch_num_regs (gdbarch, E_NUM_REGS); | |
1124 | set_gdbarch_num_pseudo_regs (gdbarch, 0); | |
1125 | set_gdbarch_sp_regnum (gdbarch, E_SP_REGNUM); | |
0ba6dca9 | 1126 | set_gdbarch_deprecated_fp_regnum (gdbarch, E_FP_REGNUM); |
0c884e17 CV |
1127 | set_gdbarch_pc_regnum (gdbarch, E_PC_REGNUM); |
1128 | set_gdbarch_register_name (gdbarch, xstormy16_register_name); | |
b1e29e33 | 1129 | set_gdbarch_deprecated_register_size (gdbarch, xstormy16_reg_size); |
9c04cab7 AC |
1130 | set_gdbarch_deprecated_register_byte (gdbarch, xstormy16_register_byte); |
1131 | set_gdbarch_deprecated_register_raw_size (gdbarch, xstormy16_register_raw_size); | |
9c04cab7 | 1132 | set_gdbarch_deprecated_register_virtual_size (gdbarch, xstormy16_register_raw_size); |
9c04cab7 | 1133 | set_gdbarch_deprecated_register_virtual_type (gdbarch, xstormy16_reg_virtual_type); |
0c884e17 CV |
1134 | |
1135 | /* | |
1136 | * Frame Info | |
1137 | */ | |
e9582e71 | 1138 | set_gdbarch_deprecated_init_extra_frame_info (gdbarch, |
0c884e17 | 1139 | xstormy16_init_extra_frame_info); |
f30ee0bc | 1140 | set_gdbarch_deprecated_frame_init_saved_regs (gdbarch, |
0c884e17 | 1141 | xstormy16_frame_init_saved_regs); |
618ce49f | 1142 | set_gdbarch_deprecated_frame_chain (gdbarch, xstormy16_frame_chain); |
129c1cd6 | 1143 | set_gdbarch_deprecated_get_saved_register (gdbarch, xstormy16_get_saved_register); |
6913c89a | 1144 | set_gdbarch_deprecated_saved_pc_after_call (gdbarch, xstormy16_saved_pc_after_call); |
8bedc050 | 1145 | set_gdbarch_deprecated_frame_saved_pc (gdbarch, xstormy16_frame_saved_pc); |
0c884e17 | 1146 | set_gdbarch_skip_prologue (gdbarch, xstormy16_skip_prologue); |
618ce49f | 1147 | set_gdbarch_deprecated_frame_chain_valid (gdbarch, xstormy16_frame_chain_valid); |
0c884e17 CV |
1148 | |
1149 | set_gdbarch_in_function_epilogue_p (gdbarch, | |
1150 | xstormy16_in_function_epilogue_p); | |
1151 | ||
1152 | /* | |
1153 | * Miscelany | |
1154 | */ | |
1155 | /* Stack grows up. */ | |
1156 | set_gdbarch_inner_than (gdbarch, core_addr_greaterthan); | |
0c884e17 | 1157 | |
0c884e17 CV |
1158 | /* |
1159 | * Call Dummies | |
1160 | * | |
1161 | * These values and methods are used when gdb calls a target function. */ | |
28f617b3 | 1162 | set_gdbarch_deprecated_push_return_address (gdbarch, xstormy16_push_return_address); |
26e9b323 | 1163 | set_gdbarch_deprecated_extract_return_value (gdbarch, xstormy16_extract_return_value); |
b81774d8 | 1164 | set_gdbarch_deprecated_push_arguments (gdbarch, xstormy16_push_arguments); |
749b82f6 | 1165 | set_gdbarch_deprecated_pop_frame (gdbarch, xstormy16_pop_frame); |
4183d812 | 1166 | set_gdbarch_deprecated_store_struct_return (gdbarch, xstormy16_store_struct_return); |
ebba8386 | 1167 | set_gdbarch_deprecated_store_return_value (gdbarch, xstormy16_store_return_value); |
74055713 | 1168 | set_gdbarch_deprecated_extract_struct_value_address (gdbarch, xstormy16_extract_struct_value_address); |
b5622e8d | 1169 | set_gdbarch_deprecated_use_struct_convention (gdbarch, xstormy16_use_struct_convention); |
0c884e17 CV |
1170 | set_gdbarch_breakpoint_from_pc (gdbarch, xstormy16_breakpoint_from_pc); |
1171 | ||
71c08af0 | 1172 | set_gdbarch_char_signed (gdbarch, 0); |
0c884e17 CV |
1173 | set_gdbarch_int_bit (gdbarch, 2 * TARGET_CHAR_BIT); |
1174 | set_gdbarch_ptr_bit (gdbarch, 2 * TARGET_CHAR_BIT); | |
1175 | set_gdbarch_addr_bit (gdbarch, 4 * TARGET_CHAR_BIT); | |
1176 | set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT); | |
1177 | ||
1178 | set_gdbarch_address_to_pointer (gdbarch, xstormy16_address_to_pointer); | |
1179 | set_gdbarch_pointer_to_address (gdbarch, xstormy16_pointer_to_address); | |
1180 | ||
f27dd7fd | 1181 | set_gdbarch_deprecated_stack_align (gdbarch, xstormy16_stack_align); |
0c884e17 | 1182 | |
a59fe496 | 1183 | set_gdbarch_deprecated_save_dummy_frame_tos (gdbarch, xstormy16_save_dummy_frame_tos); |
0c884e17 CV |
1184 | |
1185 | set_gdbarch_skip_trampoline_code (gdbarch, xstormy16_skip_trampoline_code); | |
1186 | ||
1187 | set_gdbarch_in_solib_call_trampoline (gdbarch, | |
1188 | xstormy16_in_solib_call_trampoline); | |
1189 | ||
6c0e89ed | 1190 | /* Should be using push_dummy_call. */ |
b46e02f6 | 1191 | set_gdbarch_deprecated_dummy_write_sp (gdbarch, deprecated_write_sp); |
6c0e89ed | 1192 | |
36482093 AC |
1193 | set_gdbarch_print_insn (gdbarch, print_insn_xstormy16); |
1194 | ||
0c884e17 CV |
1195 | return gdbarch; |
1196 | } | |
1197 | ||
1198 | /* Function: _initialize_xstormy16_tdep | |
1199 | Initializer function for the Sanyo Xstormy16a module. | |
1200 | Called by gdb at start-up. */ | |
1201 | ||
a78f21af AC |
1202 | extern initialize_file_ftype _initialize_xstormy16_tdep; /* -Wmissing-prototypes */ |
1203 | ||
0c884e17 CV |
1204 | void |
1205 | _initialize_xstormy16_tdep (void) | |
1206 | { | |
0c884e17 | 1207 | register_gdbarch_init (bfd_arch_xstormy16, xstormy16_gdbarch_init); |
0c884e17 | 1208 | } |