Commit | Line | Data |
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c906108c | 1 | /* Target-dependent code for the NEC V850 for GDB, the GNU debugger. |
435e042a | 2 | Copyright 1996, 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. |
c906108c | 3 | |
c5aa993b | 4 | This file is part of GDB. |
c906108c | 5 | |
c5aa993b JM |
6 | This program is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
c906108c | 10 | |
c5aa993b JM |
11 | This program is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
c906108c | 15 | |
c5aa993b JM |
16 | You should have received a copy of the GNU General Public License |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
20 | |
21 | #include "defs.h" | |
22 | #include "frame.h" | |
23 | #include "inferior.h" | |
24 | #include "obstack.h" | |
25 | #include "target.h" | |
26 | #include "value.h" | |
27 | #include "bfd.h" | |
28 | #include "gdb_string.h" | |
29 | #include "gdbcore.h" | |
30 | #include "symfile.h" | |
b4a20239 | 31 | #include "arch-utils.h" |
4e052eda | 32 | #include "regcache.h" |
435e042a | 33 | #include "symtab.h" |
c906108c | 34 | |
435e042a CV |
35 | struct gdbarch_tdep |
36 | { | |
37 | /* gdbarch target dependent data here. Currently unused for v850. */ | |
38 | }; | |
39 | ||
40 | /* Extra info which is saved in each frame_info. */ | |
41 | struct frame_extra_info | |
42 | { | |
43 | }; | |
c906108c | 44 | |
435e042a CV |
45 | enum { |
46 | E_R0_REGNUM, | |
47 | E_R1_REGNUM, | |
48 | E_R2_REGNUM, E_SAVE1_START_REGNUM = E_R2_REGNUM, E_SAVE1_END_REGNUM = E_R2_REGNUM, | |
49 | E_R3_REGNUM, E_SP_REGNUM = E_R3_REGNUM, | |
50 | E_R4_REGNUM, | |
51 | E_R5_REGNUM, | |
52 | E_R6_REGNUM, E_ARG0_REGNUM = E_R6_REGNUM, | |
53 | E_R7_REGNUM, | |
54 | E_R8_REGNUM, | |
55 | E_R9_REGNUM, E_ARGLAST_REGNUM = E_R9_REGNUM, | |
56 | E_R10_REGNUM, E_V0_REGNUM = E_R10_REGNUM, | |
57 | E_R11_REGNUM, E_V1_REGNUM = E_R11_REGNUM, | |
58 | E_R12_REGNUM, | |
59 | E_R13_REGNUM, | |
60 | E_R14_REGNUM, | |
61 | E_R15_REGNUM, | |
62 | E_R16_REGNUM, | |
63 | E_R17_REGNUM, | |
64 | E_R18_REGNUM, | |
65 | E_R19_REGNUM, | |
66 | E_R20_REGNUM, E_SAVE2_START_REGNUM = E_R20_REGNUM, | |
67 | E_R21_REGNUM, | |
68 | E_R22_REGNUM, | |
69 | E_R23_REGNUM, | |
70 | E_R24_REGNUM, | |
71 | E_R25_REGNUM, | |
72 | E_R26_REGNUM, | |
73 | E_R27_REGNUM, | |
74 | E_R28_REGNUM, | |
75 | E_R29_REGNUM, E_SAVE2_END_REGNUM = E_R29_REGNUM, E_FP_RAW_REGNUM = E_R29_REGNUM, | |
76 | E_R30_REGNUM, E_EP_REGNUM = E_R30_REGNUM, | |
77 | E_R31_REGNUM, E_SAVE3_START_REGNUM = E_R31_REGNUM, E_SAVE3_END_REGNUM = E_R31_REGNUM, E_RP_REGNUM = E_R31_REGNUM, | |
78 | E_R32_REGNUM, E_SR0_REGNUM = E_R32_REGNUM, | |
79 | E_R33_REGNUM, | |
80 | E_R34_REGNUM, | |
81 | E_R35_REGNUM, | |
82 | E_R36_REGNUM, | |
83 | E_R37_REGNUM, E_PS_REGNUM = E_R37_REGNUM, | |
84 | E_R38_REGNUM, | |
85 | E_R39_REGNUM, | |
86 | E_R40_REGNUM, | |
87 | E_R41_REGNUM, | |
88 | E_R42_REGNUM, | |
89 | E_R43_REGNUM, | |
90 | E_R44_REGNUM, | |
91 | E_R45_REGNUM, | |
92 | E_R46_REGNUM, | |
93 | E_R47_REGNUM, | |
94 | E_R48_REGNUM, | |
95 | E_R49_REGNUM, | |
96 | E_R50_REGNUM, | |
97 | E_R51_REGNUM, | |
98 | E_R52_REGNUM, E_CTBP_REGNUM = E_R52_REGNUM, | |
99 | E_R53_REGNUM, | |
100 | E_R54_REGNUM, | |
101 | E_R55_REGNUM, | |
102 | E_R56_REGNUM, | |
103 | E_R57_REGNUM, | |
104 | E_R58_REGNUM, | |
105 | E_R59_REGNUM, | |
106 | E_R60_REGNUM, | |
107 | E_R61_REGNUM, | |
108 | E_R62_REGNUM, | |
109 | E_R63_REGNUM, | |
110 | E_R64_REGNUM, E_PC_REGNUM = E_R64_REGNUM, | |
111 | E_R65_REGNUM, E_FP_REGNUM = E_R65_REGNUM, | |
112 | E_NUM_REGS | |
113 | }; | |
114 | ||
115 | enum | |
116 | { | |
117 | v850_reg_size = 4 | |
118 | }; | |
119 | ||
120 | /* Size of all registers as a whole. */ | |
121 | enum | |
122 | { | |
123 | E_ALL_REGS_SIZE = (E_NUM_REGS) * v850_reg_size | |
124 | }; | |
125 | ||
126 | static LONGEST call_dummy_nil[] = {0}; | |
127 | ||
128 | static char *v850_generic_reg_names[] = | |
129 | { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
130 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", | |
131 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
132 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
133 | "eipc", "eipsw", "fepc", "fepsw", "ecr", "psw", "sr6", "sr7", | |
134 | "sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15", | |
135 | "sr16", "sr17", "sr18", "sr19", "sr20", "sr21", "sr22", "sr23", | |
136 | "sr24", "sr25", "sr26", "sr27", "sr28", "sr29", "sr30", "sr31", | |
137 | "pc", "fp" | |
138 | }; | |
c906108c SS |
139 | |
140 | static char *v850e_reg_names[] = | |
141 | { | |
142 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
143 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", | |
144 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
145 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
146 | "eipc", "eipsw", "fepc", "fepsw", "ecr", "psw", "sr6", "sr7", | |
147 | "sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15", | |
148 | "ctpc", "ctpsw", "dbpc", "dbpsw", "ctbp", "sr21", "sr22", "sr23", | |
149 | "sr24", "sr25", "sr26", "sr27", "sr28", "sr29", "sr30", "sr31", | |
150 | "pc", "fp" | |
151 | }; | |
152 | ||
153 | char **v850_register_names = v850_generic_reg_names; | |
154 | ||
155 | struct | |
c5aa993b JM |
156 | { |
157 | char **regnames; | |
158 | int mach; | |
159 | } | |
160 | v850_processor_type_table[] = | |
c906108c | 161 | { |
c5aa993b JM |
162 | { |
163 | v850_generic_reg_names, bfd_mach_v850 | |
164 | } | |
165 | , | |
166 | { | |
167 | v850e_reg_names, bfd_mach_v850e | |
168 | } | |
169 | , | |
170 | { | |
171 | v850e_reg_names, bfd_mach_v850ea | |
172 | } | |
173 | , | |
174 | { | |
175 | NULL, 0 | |
176 | } | |
c906108c SS |
177 | }; |
178 | ||
179 | /* Info gleaned from scanning a function's prologue. */ | |
180 | ||
181 | struct pifsr /* Info about one saved reg */ | |
c5aa993b JM |
182 | { |
183 | int framereg; /* Frame reg (SP or FP) */ | |
184 | int offset; /* Offset from framereg */ | |
185 | int cur_frameoffset; /* Current frameoffset */ | |
186 | int reg; /* Saved register number */ | |
187 | }; | |
c906108c SS |
188 | |
189 | struct prologue_info | |
c5aa993b JM |
190 | { |
191 | int framereg; | |
192 | int frameoffset; | |
193 | int start_function; | |
194 | struct pifsr *pifsrs; | |
195 | }; | |
c906108c | 196 | |
a14ed312 | 197 | static CORE_ADDR v850_scan_prologue (CORE_ADDR pc, struct prologue_info *fs); |
c906108c | 198 | |
435e042a CV |
199 | /* Function: v850_register_name |
200 | Returns the name of the v850/v850e register N. */ | |
201 | ||
202 | static char * | |
203 | v850_register_name (int regnum) | |
204 | { | |
205 | if (regnum < 0 || regnum >= E_NUM_REGS) | |
206 | internal_error (__FILE__, __LINE__, | |
207 | "v850_register_name: illegal register number %d", | |
208 | regnum); | |
209 | else | |
210 | return v850_register_names[regnum]; | |
211 | ||
212 | } | |
213 | ||
214 | /* Function: v850_register_byte | |
215 | Returns the byte position in the register cache for register N. */ | |
216 | ||
217 | static int | |
218 | v850_register_byte (int regnum) | |
219 | { | |
220 | if (regnum < 0 || regnum >= E_NUM_REGS) | |
221 | internal_error (__FILE__, __LINE__, | |
222 | "v850_register_byte: illegal register number %d", | |
223 | regnum); | |
224 | else | |
225 | return regnum * v850_reg_size; | |
226 | } | |
227 | ||
228 | /* Function: v850_register_raw_size | |
229 | Returns the number of bytes occupied by the register on the target. */ | |
230 | ||
231 | static int | |
232 | v850_register_raw_size (int regnum) | |
233 | { | |
234 | if (regnum < 0 || regnum >= E_NUM_REGS) | |
235 | internal_error (__FILE__, __LINE__, | |
236 | "v850_register_raw_size: illegal register number %d", | |
237 | regnum); | |
238 | /* Only the PC has 4 Byte, all other registers 2 Byte. */ | |
239 | else | |
240 | return v850_reg_size; | |
241 | } | |
242 | ||
243 | /* Function: v850_register_virtual_size | |
244 | Returns the number of bytes occupied by the register as represented | |
245 | internally by gdb. */ | |
246 | ||
247 | static int | |
248 | v850_register_virtual_size (int regnum) | |
249 | { | |
250 | return v850_register_raw_size (regnum); | |
251 | } | |
252 | ||
253 | /* Function: v850_reg_virtual_type | |
254 | Returns the default type for register N. */ | |
255 | ||
256 | static struct type * | |
257 | v850_reg_virtual_type (int regnum) | |
258 | { | |
259 | if (regnum < 0 || regnum >= E_NUM_REGS) | |
260 | internal_error (__FILE__, __LINE__, | |
261 | "v850_register_virtual_type: illegal register number %d", | |
262 | regnum); | |
263 | else if (regnum == E_PC_REGNUM) | |
264 | return builtin_type_uint32; | |
265 | else | |
266 | return builtin_type_int32; | |
267 | } | |
c906108c SS |
268 | |
269 | /* Should call_function allocate stack space for a struct return? */ | |
270 | int | |
fba45db2 | 271 | v850_use_struct_convention (int gcc_p, struct type *type) |
c906108c SS |
272 | { |
273 | return (TYPE_NFIELDS (type) > 1 || TYPE_LENGTH (type) > 4); | |
274 | } | |
c906108c SS |
275 | \f |
276 | ||
c5aa993b | 277 | |
c906108c | 278 | /* Structure for mapping bits in register lists to register numbers. */ |
c5aa993b | 279 | struct reg_list |
c906108c SS |
280 | { |
281 | long mask; | |
282 | int regno; | |
283 | }; | |
284 | ||
285 | /* Helper function for v850_scan_prologue to handle prepare instruction. */ | |
286 | ||
287 | static void | |
c5aa993b | 288 | handle_prepare (int insn, int insn2, CORE_ADDR * current_pc_ptr, |
c906108c | 289 | struct prologue_info *pi, struct pifsr **pifsr_ptr) |
c906108c SS |
290 | { |
291 | CORE_ADDR current_pc = *current_pc_ptr; | |
292 | struct pifsr *pifsr = *pifsr_ptr; | |
293 | long next = insn2 & 0xffff; | |
294 | long list12 = ((insn & 1) << 16) + (next & 0xffe0); | |
295 | long offset = (insn & 0x3e) << 1; | |
c5aa993b | 296 | static struct reg_list reg_table[] = |
c906108c | 297 | { |
c5aa993b JM |
298 | {0x00800, 20}, /* r20 */ |
299 | {0x00400, 21}, /* r21 */ | |
300 | {0x00200, 22}, /* r22 */ | |
301 | {0x00100, 23}, /* r23 */ | |
302 | {0x08000, 24}, /* r24 */ | |
303 | {0x04000, 25}, /* r25 */ | |
304 | {0x02000, 26}, /* r26 */ | |
305 | {0x01000, 27}, /* r27 */ | |
306 | {0x00080, 28}, /* r28 */ | |
307 | {0x00040, 29}, /* r29 */ | |
308 | {0x10000, 30}, /* ep */ | |
309 | {0x00020, 31}, /* lp */ | |
310 | {0, 0} /* end of table */ | |
c906108c SS |
311 | }; |
312 | int i; | |
313 | ||
c5aa993b | 314 | if ((next & 0x1f) == 0x0b) /* skip imm16 argument */ |
c906108c SS |
315 | current_pc += 2; |
316 | else if ((next & 0x1f) == 0x13) /* skip imm16 argument */ | |
317 | current_pc += 2; | |
318 | else if ((next & 0x1f) == 0x1b) /* skip imm32 argument */ | |
319 | current_pc += 4; | |
320 | ||
321 | /* Calculate the total size of the saved registers, and add it | |
322 | it to the immediate value used to adjust SP. */ | |
323 | for (i = 0; reg_table[i].mask != 0; i++) | |
324 | if (list12 & reg_table[i].mask) | |
435e042a | 325 | offset += v850_register_raw_size (reg_table[i].regno); |
c906108c SS |
326 | pi->frameoffset -= offset; |
327 | ||
328 | /* Calculate the offsets of the registers relative to the value | |
329 | the SP will have after the registers have been pushed and the | |
330 | imm5 value has been subtracted from it. */ | |
331 | if (pifsr) | |
332 | { | |
333 | for (i = 0; reg_table[i].mask != 0; i++) | |
334 | { | |
335 | if (list12 & reg_table[i].mask) | |
336 | { | |
337 | int reg = reg_table[i].regno; | |
435e042a | 338 | offset -= v850_register_raw_size (reg); |
c906108c SS |
339 | pifsr->reg = reg; |
340 | pifsr->offset = offset; | |
341 | pifsr->cur_frameoffset = pi->frameoffset; | |
c5aa993b | 342 | #ifdef DEBUG |
c906108c | 343 | printf_filtered ("\tSaved register r%d, offset %d", reg, pifsr->offset); |
c5aa993b | 344 | #endif |
c906108c SS |
345 | pifsr++; |
346 | } | |
347 | } | |
348 | } | |
349 | #ifdef DEBUG | |
350 | printf_filtered ("\tfound ctret after regsave func"); | |
351 | #endif | |
352 | ||
353 | /* Set result parameters. */ | |
354 | *current_pc_ptr = current_pc; | |
355 | *pifsr_ptr = pifsr; | |
356 | } | |
357 | ||
358 | ||
359 | /* Helper function for v850_scan_prologue to handle pushm/pushl instructions. | |
360 | FIXME: the SR bit of the register list is not supported; must check | |
361 | that the compiler does not ever generate this bit. */ | |
362 | ||
363 | static void | |
364 | handle_pushm (int insn, int insn2, struct prologue_info *pi, | |
c5aa993b | 365 | struct pifsr **pifsr_ptr) |
c906108c SS |
366 | { |
367 | struct pifsr *pifsr = *pifsr_ptr; | |
368 | long list12 = ((insn & 0x0f) << 16) + (insn2 & 0xfff0); | |
369 | long offset = 0; | |
c5aa993b | 370 | static struct reg_list pushml_reg_table[] = |
c906108c | 371 | { |
435e042a | 372 | {0x80000, E_PS_REGNUM}, /* PSW */ |
c5aa993b JM |
373 | {0x40000, 1}, /* r1 */ |
374 | {0x20000, 2}, /* r2 */ | |
375 | {0x10000, 3}, /* r3 */ | |
376 | {0x00800, 4}, /* r4 */ | |
377 | {0x00400, 5}, /* r5 */ | |
378 | {0x00200, 6}, /* r6 */ | |
379 | {0x00100, 7}, /* r7 */ | |
380 | {0x08000, 8}, /* r8 */ | |
381 | {0x04000, 9}, /* r9 */ | |
382 | {0x02000, 10}, /* r10 */ | |
383 | {0x01000, 11}, /* r11 */ | |
384 | {0x00080, 12}, /* r12 */ | |
385 | {0x00040, 13}, /* r13 */ | |
386 | {0x00020, 14}, /* r14 */ | |
387 | {0x00010, 15}, /* r15 */ | |
388 | {0, 0} /* end of table */ | |
c906108c | 389 | }; |
c5aa993b | 390 | static struct reg_list pushmh_reg_table[] = |
c906108c | 391 | { |
c5aa993b JM |
392 | {0x80000, 16}, /* r16 */ |
393 | {0x40000, 17}, /* r17 */ | |
394 | {0x20000, 18}, /* r18 */ | |
395 | {0x10000, 19}, /* r19 */ | |
396 | {0x00800, 20}, /* r20 */ | |
397 | {0x00400, 21}, /* r21 */ | |
398 | {0x00200, 22}, /* r22 */ | |
399 | {0x00100, 23}, /* r23 */ | |
400 | {0x08000, 24}, /* r24 */ | |
401 | {0x04000, 25}, /* r25 */ | |
402 | {0x02000, 26}, /* r26 */ | |
403 | {0x01000, 27}, /* r27 */ | |
404 | {0x00080, 28}, /* r28 */ | |
405 | {0x00040, 29}, /* r29 */ | |
406 | {0x00010, 30}, /* r30 */ | |
407 | {0x00020, 31}, /* r31 */ | |
408 | {0, 0} /* end of table */ | |
c906108c SS |
409 | }; |
410 | struct reg_list *reg_table; | |
411 | int i; | |
412 | ||
413 | /* Is this a pushml or a pushmh? */ | |
414 | if ((insn2 & 7) == 1) | |
415 | reg_table = pushml_reg_table; | |
416 | else | |
417 | reg_table = pushmh_reg_table; | |
418 | ||
419 | /* Calculate the total size of the saved registers, and add it | |
420 | it to the immediate value used to adjust SP. */ | |
421 | for (i = 0; reg_table[i].mask != 0; i++) | |
422 | if (list12 & reg_table[i].mask) | |
435e042a | 423 | offset += v850_register_raw_size (reg_table[i].regno); |
c906108c SS |
424 | pi->frameoffset -= offset; |
425 | ||
426 | /* Calculate the offsets of the registers relative to the value | |
427 | the SP will have after the registers have been pushed and the | |
428 | imm5 value is subtracted from it. */ | |
429 | if (pifsr) | |
430 | { | |
431 | for (i = 0; reg_table[i].mask != 0; i++) | |
432 | { | |
433 | if (list12 & reg_table[i].mask) | |
434 | { | |
435 | int reg = reg_table[i].regno; | |
435e042a | 436 | offset -= v850_register_raw_size (reg); |
c906108c SS |
437 | pifsr->reg = reg; |
438 | pifsr->offset = offset; | |
439 | pifsr->cur_frameoffset = pi->frameoffset; | |
c5aa993b | 440 | #ifdef DEBUG |
c906108c | 441 | printf_filtered ("\tSaved register r%d, offset %d", reg, pifsr->offset); |
c5aa993b | 442 | #endif |
c906108c SS |
443 | pifsr++; |
444 | } | |
445 | } | |
446 | } | |
447 | #ifdef DEBUG | |
448 | printf_filtered ("\tfound ctret after regsave func"); | |
449 | #endif | |
450 | ||
451 | /* Set result parameters. */ | |
452 | *pifsr_ptr = pifsr; | |
453 | } | |
c5aa993b | 454 | \f |
c906108c SS |
455 | |
456 | ||
457 | ||
c906108c SS |
458 | /* Function: scan_prologue |
459 | Scan the prologue of the function that contains PC, and record what | |
3a06899a CV |
460 | we find in PI. Returns the pc after the prologue. Note that the |
461 | addresses saved in frame->saved_regs are just frame relative (negative | |
462 | offsets from the frame pointer). This is because we don't know the | |
463 | actual value of the frame pointer yet. In some circumstances, the | |
464 | frame pointer can't be determined till after we have scanned the | |
465 | prologue. */ | |
c906108c SS |
466 | |
467 | static CORE_ADDR | |
fba45db2 | 468 | v850_scan_prologue (CORE_ADDR pc, struct prologue_info *pi) |
c906108c SS |
469 | { |
470 | CORE_ADDR func_addr, prologue_end, current_pc; | |
471 | struct pifsr *pifsr, *pifsr_tmp; | |
472 | int fp_used; | |
473 | int ep_used; | |
474 | int reg; | |
475 | CORE_ADDR save_pc, save_end; | |
476 | int regsave_func_p; | |
477 | int r12_tmp; | |
478 | ||
479 | /* First, figure out the bounds of the prologue so that we can limit the | |
480 | search to something reasonable. */ | |
481 | ||
482 | if (find_pc_partial_function (pc, NULL, &func_addr, NULL)) | |
483 | { | |
484 | struct symtab_and_line sal; | |
485 | ||
486 | sal = find_pc_line (func_addr, 0); | |
487 | ||
488 | if (func_addr == entry_point_address ()) | |
489 | pi->start_function = 1; | |
490 | else | |
491 | pi->start_function = 0; | |
492 | ||
493 | #if 0 | |
494 | if (sal.line == 0) | |
495 | prologue_end = pc; | |
496 | else | |
497 | prologue_end = sal.end; | |
498 | #else | |
499 | prologue_end = pc; | |
500 | #endif | |
501 | } | |
502 | else | |
503 | { /* We're in the boondocks */ | |
504 | func_addr = pc - 100; | |
505 | prologue_end = pc; | |
506 | } | |
507 | ||
508 | prologue_end = min (prologue_end, pc); | |
509 | ||
510 | /* Now, search the prologue looking for instructions that setup fp, save | |
511 | rp, adjust sp and such. We also record the frame offset of any saved | |
c5aa993b | 512 | registers. */ |
c906108c SS |
513 | |
514 | pi->frameoffset = 0; | |
435e042a | 515 | pi->framereg = E_SP_REGNUM; |
c906108c SS |
516 | fp_used = 0; |
517 | ep_used = 0; | |
518 | pifsr = pi->pifsrs; | |
519 | regsave_func_p = 0; | |
520 | save_pc = 0; | |
521 | save_end = 0; | |
522 | r12_tmp = 0; | |
523 | ||
524 | #ifdef DEBUG | |
525 | printf_filtered ("Current_pc = 0x%.8lx, prologue_end = 0x%.8lx\n", | |
c5aa993b | 526 | (long) func_addr, (long) prologue_end); |
c906108c SS |
527 | #endif |
528 | ||
c5aa993b | 529 | for (current_pc = func_addr; current_pc < prologue_end;) |
c906108c | 530 | { |
93d56215 AC |
531 | int insn; |
532 | int insn2 = -1; /* dummy value */ | |
c906108c SS |
533 | |
534 | #ifdef DEBUG | |
c5aa993b | 535 | printf_filtered ("0x%.8lx ", (long) current_pc); |
2bf0cb65 | 536 | TARGET_PRINT_INSN (current_pc, &tm_print_insn_info); |
c906108c SS |
537 | #endif |
538 | ||
539 | insn = read_memory_unsigned_integer (current_pc, 2); | |
540 | current_pc += 2; | |
c5aa993b | 541 | if ((insn & 0x0780) >= 0x0600) /* Four byte instruction? */ |
c906108c SS |
542 | { |
543 | insn2 = read_memory_unsigned_integer (current_pc, 2); | |
544 | current_pc += 2; | |
545 | } | |
546 | ||
547 | if ((insn & 0xffc0) == ((10 << 11) | 0x0780) && !regsave_func_p) | |
548 | { /* jarl <func>,10 */ | |
c5aa993b | 549 | long low_disp = insn2 & ~(long) 1; |
c906108c | 550 | long disp = (((((insn & 0x3f) << 16) + low_disp) |
c5aa993b | 551 | & ~(long) 1) ^ 0x00200000) - 0x00200000; |
c906108c SS |
552 | |
553 | save_pc = current_pc; | |
554 | save_end = prologue_end; | |
555 | regsave_func_p = 1; | |
556 | current_pc += disp - 4; | |
557 | prologue_end = (current_pc | |
558 | + (2 * 3) /* moves to/from ep */ | |
c5aa993b JM |
559 | + 4 /* addi <const>,sp,sp */ |
560 | + 2 /* jmp [r10] */ | |
c906108c SS |
561 | + (2 * 12) /* sst.w to save r2, r20-r29, r31 */ |
562 | + 20); /* slop area */ | |
563 | ||
564 | #ifdef DEBUG | |
565 | printf_filtered ("\tfound jarl <func>,r10, disp = %ld, low_disp = %ld, new pc = 0x%.8lx\n", | |
c5aa993b | 566 | disp, low_disp, (long) current_pc + 2); |
c906108c SS |
567 | #endif |
568 | continue; | |
569 | } | |
570 | else if ((insn & 0xffc0) == 0x0200 && !regsave_func_p) | |
571 | { /* callt <imm6> */ | |
435e042a | 572 | long ctbp = read_register (E_CTBP_REGNUM); |
c906108c SS |
573 | long adr = ctbp + ((insn & 0x3f) << 1); |
574 | ||
575 | save_pc = current_pc; | |
576 | save_end = prologue_end; | |
577 | regsave_func_p = 1; | |
578 | current_pc = ctbp + (read_memory_unsigned_integer (adr, 2) & 0xffff); | |
579 | prologue_end = (current_pc | |
580 | + (2 * 3) /* prepare list2,imm5,sp/imm */ | |
c5aa993b | 581 | + 4 /* ctret */ |
c906108c SS |
582 | + 20); /* slop area */ |
583 | ||
584 | #ifdef DEBUG | |
585 | printf_filtered ("\tfound callt, ctbp = 0x%.8lx, adr = %.8lx, new pc = 0x%.8lx\n", | |
c5aa993b | 586 | ctbp, adr, (long) current_pc); |
c906108c SS |
587 | #endif |
588 | continue; | |
589 | } | |
590 | else if ((insn & 0xffc0) == 0x0780) /* prepare list2,imm5 */ | |
591 | { | |
592 | handle_prepare (insn, insn2, ¤t_pc, pi, &pifsr); | |
593 | continue; | |
594 | } | |
595 | else if (insn == 0x07e0 && regsave_func_p && insn2 == 0x0144) | |
596 | { /* ctret after processing register save function */ | |
597 | current_pc = save_pc; | |
598 | prologue_end = save_end; | |
599 | regsave_func_p = 0; | |
600 | #ifdef DEBUG | |
601 | printf_filtered ("\tfound ctret after regsave func"); | |
602 | #endif | |
603 | continue; | |
604 | } | |
605 | else if ((insn & 0xfff0) == 0x07e0 && (insn2 & 5) == 1) | |
606 | { /* pushml, pushmh */ | |
607 | handle_pushm (insn, insn2, pi, &pifsr); | |
608 | continue; | |
609 | } | |
610 | else if ((insn & 0xffe0) == 0x0060 && regsave_func_p) | |
611 | { /* jmp after processing register save function */ | |
612 | current_pc = save_pc; | |
613 | prologue_end = save_end; | |
614 | regsave_func_p = 0; | |
615 | #ifdef DEBUG | |
616 | printf_filtered ("\tfound jmp after regsave func"); | |
617 | #endif | |
618 | continue; | |
619 | } | |
620 | else if ((insn & 0x07c0) == 0x0780 /* jarl or jr */ | |
621 | || (insn & 0xffe0) == 0x0060 /* jmp */ | |
622 | || (insn & 0x0780) == 0x0580) /* branch */ | |
623 | { | |
624 | #ifdef DEBUG | |
625 | printf_filtered ("\n"); | |
626 | #endif | |
c5aa993b | 627 | break; /* Ran into end of prologue */ |
c906108c SS |
628 | } |
629 | ||
435e042a | 630 | else if ((insn & 0xffe0) == ((E_SP_REGNUM << 11) | 0x0240)) /* add <imm>,sp */ |
c906108c | 631 | pi->frameoffset += ((insn & 0x1f) ^ 0x10) - 0x10; |
435e042a | 632 | else if (insn == ((E_SP_REGNUM << 11) | 0x0600 | E_SP_REGNUM)) /* addi <imm>,sp,sp */ |
c906108c | 633 | pi->frameoffset += insn2; |
435e042a | 634 | else if (insn == ((E_FP_RAW_REGNUM << 11) | 0x0000 | E_SP_REGNUM)) /* mov sp,fp */ |
c906108c SS |
635 | { |
636 | fp_used = 1; | |
435e042a | 637 | pi->framereg = E_FP_RAW_REGNUM; |
c906108c SS |
638 | } |
639 | ||
435e042a | 640 | else if (insn == ((E_R12_REGNUM << 11) | 0x0640 | E_R0_REGNUM)) /* movhi hi(const),r0,r12 */ |
c906108c | 641 | r12_tmp = insn2 << 16; |
435e042a | 642 | else if (insn == ((E_R12_REGNUM << 11) | 0x0620 | E_R12_REGNUM)) /* movea lo(const),r12,r12 */ |
c906108c | 643 | r12_tmp += insn2; |
435e042a | 644 | else if (insn == ((E_SP_REGNUM << 11) | 0x01c0 | E_R12_REGNUM) && r12_tmp) /* add r12,sp */ |
c906108c | 645 | pi->frameoffset = r12_tmp; |
435e042a | 646 | else if (insn == ((E_EP_REGNUM << 11) | 0x0000 | E_SP_REGNUM)) /* mov sp,ep */ |
c906108c | 647 | ep_used = 1; |
435e042a | 648 | else if (insn == ((E_EP_REGNUM << 11) | 0x0000 | E_R1_REGNUM)) /* mov r1,ep */ |
c906108c | 649 | ep_used = 0; |
435e042a | 650 | else if (((insn & 0x07ff) == (0x0760 | E_SP_REGNUM) /* st.w <reg>,<offset>[sp] */ |
c906108c | 651 | || (fp_used |
435e042a | 652 | && (insn & 0x07ff) == (0x0760 | E_FP_RAW_REGNUM))) /* st.w <reg>,<offset>[fp] */ |
c906108c | 653 | && pifsr |
435e042a CV |
654 | && (((reg = (insn >> 11) & 0x1f) >= E_SAVE1_START_REGNUM && reg <= E_SAVE1_END_REGNUM) |
655 | || (reg >= E_SAVE2_START_REGNUM && reg <= E_SAVE2_END_REGNUM) | |
656 | || (reg >= E_SAVE3_START_REGNUM && reg <= E_SAVE3_END_REGNUM))) | |
c906108c SS |
657 | { |
658 | pifsr->reg = reg; | |
659 | pifsr->offset = insn2 & ~1; | |
660 | pifsr->cur_frameoffset = pi->frameoffset; | |
661 | #ifdef DEBUG | |
662 | printf_filtered ("\tSaved register r%d, offset %d", reg, pifsr->offset); | |
663 | #endif | |
664 | pifsr++; | |
665 | } | |
666 | ||
c5aa993b | 667 | else if (ep_used /* sst.w <reg>,<offset>[ep] */ |
c906108c SS |
668 | && ((insn & 0x0781) == 0x0501) |
669 | && pifsr | |
435e042a CV |
670 | && (((reg = (insn >> 11) & 0x1f) >= E_SAVE1_START_REGNUM && reg <= E_SAVE1_END_REGNUM) |
671 | || (reg >= E_SAVE2_START_REGNUM && reg <= E_SAVE2_END_REGNUM) | |
672 | || (reg >= E_SAVE3_START_REGNUM && reg <= E_SAVE3_END_REGNUM))) | |
c906108c SS |
673 | { |
674 | pifsr->reg = reg; | |
675 | pifsr->offset = (insn & 0x007e) << 1; | |
676 | pifsr->cur_frameoffset = pi->frameoffset; | |
677 | #ifdef DEBUG | |
678 | printf_filtered ("\tSaved register r%d, offset %d", reg, pifsr->offset); | |
679 | #endif | |
680 | pifsr++; | |
681 | } | |
682 | ||
683 | #ifdef DEBUG | |
684 | printf_filtered ("\n"); | |
685 | #endif | |
686 | } | |
687 | ||
688 | if (pifsr) | |
689 | pifsr->framereg = 0; /* Tie off last entry */ | |
690 | ||
691 | /* Fix up any offsets to the final offset. If a frame pointer was created, use it | |
692 | instead of the stack pointer. */ | |
693 | for (pifsr_tmp = pi->pifsrs; pifsr_tmp && pifsr_tmp != pifsr; pifsr_tmp++) | |
694 | { | |
695 | pifsr_tmp->offset -= pi->frameoffset - pifsr_tmp->cur_frameoffset; | |
696 | pifsr_tmp->framereg = pi->framereg; | |
697 | ||
698 | #ifdef DEBUG | |
699 | printf_filtered ("Saved register r%d, offset = %d, framereg = r%d\n", | |
c5aa993b | 700 | pifsr_tmp->reg, pifsr_tmp->offset, pifsr_tmp->framereg); |
c906108c SS |
701 | #endif |
702 | } | |
703 | ||
704 | #ifdef DEBUG | |
705 | printf_filtered ("Framereg = r%d, frameoffset = %d\n", pi->framereg, pi->frameoffset); | |
706 | #endif | |
707 | ||
708 | return current_pc; | |
709 | } | |
710 | ||
435e042a CV |
711 | /* Function: find_callers_reg |
712 | Find REGNUM on the stack. Otherwise, it's in an active register. | |
713 | One thing we might want to do here is to check REGNUM against the | |
714 | clobber mask, and somehow flag it as invalid if it isn't saved on | |
715 | the stack somewhere. This would provide a graceful failure mode | |
716 | when trying to get the value of caller-saves registers for an inner | |
717 | frame. */ | |
c906108c | 718 | |
435e042a CV |
719 | CORE_ADDR |
720 | v850_find_callers_reg (struct frame_info *fi, int regnum) | |
c906108c | 721 | { |
435e042a CV |
722 | for (; fi; fi = fi->next) |
723 | if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame)) | |
724 | return generic_read_register_dummy (fi->pc, fi->frame, regnum); | |
725 | else if (fi->saved_regs[regnum] != 0) | |
726 | return read_memory_unsigned_integer (fi->saved_regs[regnum], | |
727 | v850_register_raw_size (regnum)); | |
c906108c | 728 | |
435e042a | 729 | return read_register (regnum); |
c906108c SS |
730 | } |
731 | ||
732 | /* Function: frame_chain | |
733 | Figure out the frame prior to FI. Unfortunately, this involves | |
734 | scanning the prologue of the caller, which will also be done | |
735 | shortly by v850_init_extra_frame_info. For the dummy frame, we | |
736 | just return the stack pointer that was in use at the time the | |
737 | function call was made. */ | |
738 | ||
739 | CORE_ADDR | |
fba45db2 | 740 | v850_frame_chain (struct frame_info *fi) |
c906108c SS |
741 | { |
742 | struct prologue_info pi; | |
743 | CORE_ADDR callers_pc, fp; | |
744 | ||
745 | /* First, find out who called us */ | |
746 | callers_pc = FRAME_SAVED_PC (fi); | |
747 | /* If caller is a call-dummy, then our FP bears no relation to his FP! */ | |
435e042a | 748 | fp = v850_find_callers_reg (fi, E_FP_RAW_REGNUM); |
c5aa993b JM |
749 | if (PC_IN_CALL_DUMMY (callers_pc, fp, fp)) |
750 | return fp; /* caller is call-dummy: return oldest value of FP */ | |
c906108c SS |
751 | |
752 | /* Caller is NOT a call-dummy, so everything else should just work. | |
753 | Even if THIS frame is a call-dummy! */ | |
754 | pi.pifsrs = NULL; | |
755 | ||
756 | v850_scan_prologue (callers_pc, &pi); | |
757 | ||
758 | if (pi.start_function) | |
759 | return 0; /* Don't chain beyond the start function */ | |
760 | ||
435e042a | 761 | if (pi.framereg == E_FP_RAW_REGNUM) |
c906108c SS |
762 | return v850_find_callers_reg (fi, pi.framereg); |
763 | ||
764 | return fi->frame - pi.frameoffset; | |
765 | } | |
766 | ||
c906108c SS |
767 | /* Function: skip_prologue |
768 | Return the address of the first code past the prologue of the function. */ | |
769 | ||
770 | CORE_ADDR | |
fba45db2 | 771 | v850_skip_prologue (CORE_ADDR pc) |
c906108c SS |
772 | { |
773 | CORE_ADDR func_addr, func_end; | |
774 | ||
775 | /* See what the symbol table says */ | |
776 | ||
777 | if (find_pc_partial_function (pc, NULL, &func_addr, &func_end)) | |
778 | { | |
779 | struct symtab_and_line sal; | |
780 | ||
781 | sal = find_pc_line (func_addr, 0); | |
782 | ||
783 | if (sal.line != 0 && sal.end < func_end) | |
784 | return sal.end; | |
785 | else | |
786 | /* Either there's no line info, or the line after the prologue is after | |
787 | the end of the function. In this case, there probably isn't a | |
788 | prologue. */ | |
789 | return pc; | |
790 | } | |
791 | ||
792 | /* We can't find the start of this function, so there's nothing we can do. */ | |
793 | return pc; | |
794 | } | |
795 | ||
796 | /* Function: pop_frame | |
797 | This routine gets called when either the user uses the `return' | |
798 | command, or the call dummy breakpoint gets hit. */ | |
799 | ||
800 | void | |
435e042a | 801 | v850_pop_frame (void) |
c906108c | 802 | { |
435e042a | 803 | struct frame_info *frame = get_current_frame (); |
c906108c SS |
804 | int regnum; |
805 | ||
c5aa993b | 806 | if (PC_IN_CALL_DUMMY (frame->pc, frame->frame, frame->frame)) |
c906108c SS |
807 | generic_pop_dummy_frame (); |
808 | else | |
809 | { | |
435e042a | 810 | write_register (E_PC_REGNUM, FRAME_SAVED_PC (frame)); |
c906108c | 811 | |
435e042a | 812 | for (regnum = 0; regnum < E_NUM_REGS; regnum++) |
3a06899a | 813 | if (frame->saved_regs[regnum] != 0) |
c906108c | 814 | write_register (regnum, |
3a06899a | 815 | read_memory_unsigned_integer (frame->saved_regs[regnum], |
435e042a | 816 | v850_register_raw_size (regnum))); |
c906108c | 817 | |
435e042a | 818 | write_register (E_SP_REGNUM, FRAME_FP (frame)); |
c906108c SS |
819 | } |
820 | ||
821 | flush_cached_frames (); | |
822 | } | |
823 | ||
824 | /* Function: push_arguments | |
825 | Setup arguments and RP for a call to the target. First four args | |
826 | go in R6->R9, subsequent args go into sp + 16 -> sp + ... Structs | |
827 | are passed by reference. 64 bit quantities (doubles and long | |
828 | longs) may be split between the regs and the stack. When calling a | |
829 | function that returns a struct, a pointer to the struct is passed | |
830 | in as a secret first argument (always in R6). | |
831 | ||
832 | Stack space for the args has NOT been allocated: that job is up to us. | |
c5aa993b | 833 | */ |
c906108c SS |
834 | |
835 | CORE_ADDR | |
ea7c478f | 836 | v850_push_arguments (int nargs, struct value **args, CORE_ADDR sp, |
435e042a | 837 | int struct_return, CORE_ADDR struct_addr) |
c906108c SS |
838 | { |
839 | int argreg; | |
840 | int argnum; | |
841 | int len = 0; | |
842 | int stack_offset; | |
843 | ||
844 | /* First, just for safety, make sure stack is aligned */ | |
845 | sp &= ~3; | |
846 | ||
847 | /* Now make space on the stack for the args. */ | |
848 | for (argnum = 0; argnum < nargs; argnum++) | |
c5aa993b JM |
849 | len += ((TYPE_LENGTH (VALUE_TYPE (args[argnum])) + 3) & ~3); |
850 | sp -= len; /* possibly over-allocating, but it works... */ | |
851 | /* (you might think we could allocate 16 bytes */ | |
852 | /* less, but the ABI seems to use it all! ) */ | |
435e042a | 853 | argreg = E_ARG0_REGNUM; |
c906108c SS |
854 | |
855 | /* the struct_return pointer occupies the first parameter-passing reg */ | |
856 | if (struct_return) | |
c5aa993b | 857 | write_register (argreg++, struct_addr); |
c906108c SS |
858 | |
859 | stack_offset = 16; | |
860 | /* The offset onto the stack at which we will start copying parameters | |
861 | (after the registers are used up) begins at 16 rather than at zero. | |
862 | I don't really know why, that's just the way it seems to work. */ | |
863 | ||
864 | /* Now load as many as possible of the first arguments into | |
865 | registers, and push the rest onto the stack. There are 16 bytes | |
866 | in four registers available. Loop thru args from first to last. */ | |
867 | for (argnum = 0; argnum < nargs; argnum++) | |
868 | { | |
869 | int len; | |
870 | char *val; | |
435e042a | 871 | char valbuf[v850_register_raw_size (E_ARG0_REGNUM)]; |
c906108c SS |
872 | |
873 | if (TYPE_CODE (VALUE_TYPE (*args)) == TYPE_CODE_STRUCT | |
874 | && TYPE_LENGTH (VALUE_TYPE (*args)) > 8) | |
875 | { | |
876 | store_address (valbuf, 4, VALUE_ADDRESS (*args)); | |
877 | len = 4; | |
878 | val = valbuf; | |
879 | } | |
880 | else | |
881 | { | |
882 | len = TYPE_LENGTH (VALUE_TYPE (*args)); | |
c5aa993b | 883 | val = (char *) VALUE_CONTENTS (*args); |
c906108c SS |
884 | } |
885 | ||
886 | while (len > 0) | |
435e042a | 887 | if (argreg <= E_ARGLAST_REGNUM) |
c906108c SS |
888 | { |
889 | CORE_ADDR regval; | |
890 | ||
435e042a | 891 | regval = extract_address (val, v850_register_raw_size (argreg)); |
c906108c SS |
892 | write_register (argreg, regval); |
893 | ||
435e042a CV |
894 | len -= v850_register_raw_size (argreg); |
895 | val += v850_register_raw_size (argreg); | |
c906108c SS |
896 | argreg++; |
897 | } | |
898 | else | |
899 | { | |
900 | write_memory (sp + stack_offset, val, 4); | |
901 | ||
902 | len -= 4; | |
903 | val += 4; | |
904 | stack_offset += 4; | |
905 | } | |
906 | args++; | |
907 | } | |
908 | return sp; | |
909 | } | |
910 | ||
911 | /* Function: push_return_address (pc) | |
912 | Set up the return address for the inferior function call. | |
913 | Needed for targets where we don't actually execute a JSR/BSR instruction */ | |
c5aa993b | 914 | |
c906108c | 915 | CORE_ADDR |
fba45db2 | 916 | v850_push_return_address (CORE_ADDR pc, CORE_ADDR sp) |
c906108c | 917 | { |
435e042a | 918 | write_register (E_RP_REGNUM, CALL_DUMMY_ADDRESS ()); |
c906108c SS |
919 | return sp; |
920 | } | |
c5aa993b | 921 | |
c906108c | 922 | /* Function: frame_saved_pc |
435e042a | 923 | Find the caller of this frame. We do this by seeing if E_RP_REGNUM |
c906108c SS |
924 | is saved in the stack anywhere, otherwise we get it from the |
925 | registers. If the inner frame is a dummy frame, return its PC | |
926 | instead of RP, because that's where "caller" of the dummy-frame | |
927 | will be found. */ | |
928 | ||
929 | CORE_ADDR | |
fba45db2 | 930 | v850_frame_saved_pc (struct frame_info *fi) |
c906108c | 931 | { |
c5aa993b | 932 | if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame)) |
435e042a | 933 | return generic_read_register_dummy (fi->pc, fi->frame, E_PC_REGNUM); |
c906108c | 934 | else |
435e042a | 935 | return v850_find_callers_reg (fi, E_RP_REGNUM); |
c906108c SS |
936 | } |
937 | ||
c906108c SS |
938 | |
939 | /* Function: fix_call_dummy | |
940 | Pokes the callee function's address into the CALL_DUMMY assembly stub. | |
941 | Assumes that the CALL_DUMMY looks like this: | |
c5aa993b JM |
942 | jarl <offset24>, r31 |
943 | trap | |
944 | */ | |
c906108c | 945 | |
435e042a | 946 | void |
fba45db2 | 947 | v850_fix_call_dummy (char *dummy, CORE_ADDR sp, CORE_ADDR fun, int nargs, |
ea7c478f | 948 | struct value **args, struct type *type, int gcc_p) |
c906108c SS |
949 | { |
950 | long offset24; | |
951 | ||
952 | offset24 = (long) fun - (long) entry_point_address (); | |
953 | offset24 &= 0x3fffff; | |
954 | offset24 |= 0xff800000; /* jarl <offset24>, r31 */ | |
955 | ||
c5aa993b JM |
956 | store_unsigned_integer ((unsigned int *) &dummy[2], 2, offset24 & 0xffff); |
957 | store_unsigned_integer ((unsigned int *) &dummy[0], 2, offset24 >> 16); | |
435e042a CV |
958 | } |
959 | ||
960 | static CORE_ADDR | |
961 | v850_saved_pc_after_call (struct frame_info *ignore) | |
962 | { | |
963 | return read_register (E_RP_REGNUM); | |
964 | } | |
965 | ||
966 | static void | |
967 | v850_extract_return_value (struct type *type, char *regbuf, char *valbuf) | |
968 | { | |
969 | memcpy (valbuf, regbuf + v850_register_byte (E_V0_REGNUM), | |
970 | TYPE_LENGTH (type)); | |
971 | } | |
972 | ||
973 | const static unsigned char * | |
974 | v850_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr) | |
975 | { | |
976 | static unsigned char breakpoint[] = { 0x85, 0x05 }; | |
977 | *lenptr = sizeof (breakpoint); | |
978 | return breakpoint; | |
979 | } | |
980 | ||
981 | static CORE_ADDR | |
982 | v850_extract_struct_value_address (char *regbuf) | |
983 | { | |
984 | return extract_address (regbuf + v850_register_byte (E_V0_REGNUM), | |
985 | v850_register_raw_size (E_V0_REGNUM)); | |
986 | } | |
987 | ||
988 | static void | |
989 | v850_store_return_value (struct type *type, char *valbuf) | |
990 | { | |
991 | write_register_bytes(v850_register_byte (E_V0_REGNUM), valbuf, | |
992 | TYPE_LENGTH (type)); | |
993 | } | |
994 | ||
995 | static void | |
996 | v850_frame_init_saved_regs (struct frame_info *fi) | |
997 | { | |
998 | struct prologue_info pi; | |
999 | struct pifsr pifsrs[E_NUM_REGS + 1], *pifsr; | |
1000 | CORE_ADDR func_addr, func_end; | |
1001 | ||
1002 | if (!fi->saved_regs) | |
1003 | { | |
1004 | frame_saved_regs_zalloc (fi); | |
1005 | ||
1006 | /* The call dummy doesn't save any registers on the stack, so we | |
1007 | can return now. */ | |
1008 | if (PC_IN_CALL_DUMMY (fi->pc, fi->frame, fi->frame)) | |
1009 | return; | |
1010 | ||
1011 | /* Find the beginning of this function, so we can analyze its | |
1012 | prologue. */ | |
1013 | if (find_pc_partial_function (fi->pc, NULL, &func_addr, &func_end)) | |
1014 | { | |
1015 | pi.pifsrs = pifsrs; | |
1016 | ||
1017 | v850_scan_prologue (fi->pc, &pi); | |
1018 | ||
1019 | if (!fi->next && pi.framereg == E_SP_REGNUM) | |
1020 | fi->frame = read_register (pi.framereg) - pi.frameoffset; | |
1021 | ||
1022 | for (pifsr = pifsrs; pifsr->framereg; pifsr++) | |
1023 | { | |
1024 | fi->saved_regs[pifsr->reg] = pifsr->offset + fi->frame; | |
1025 | ||
1026 | if (pifsr->framereg == E_SP_REGNUM) | |
1027 | fi->saved_regs[pifsr->reg] += pi.frameoffset; | |
1028 | } | |
1029 | } | |
1030 | /* Else we're out of luck (can't debug completely stripped code). | |
1031 | FIXME. */ | |
1032 | } | |
1033 | } | |
1034 | ||
1035 | /* Function: init_extra_frame_info | |
1036 | Setup the frame's frame pointer, pc, and frame addresses for saved | |
1037 | registers. Most of the work is done in scan_prologue(). | |
1038 | ||
1039 | Note that when we are called for the last frame (currently active frame), | |
1040 | that fi->pc and fi->frame will already be setup. However, fi->frame will | |
1041 | be valid only if this routine uses FP. For previous frames, fi-frame will | |
1042 | always be correct (since that is derived from v850_frame_chain ()). | |
1043 | ||
1044 | We can be called with the PC in the call dummy under two circumstances. | |
1045 | First, during normal backtracing, second, while figuring out the frame | |
1046 | pointer just prior to calling the target function (see run_stack_dummy). */ | |
1047 | ||
1048 | static void | |
1049 | v850_init_extra_frame_info (int fromleaf, struct frame_info *fi) | |
1050 | { | |
1051 | struct prologue_info pi; | |
1052 | ||
1053 | if (fi->next) | |
1054 | fi->pc = FRAME_SAVED_PC (fi->next); | |
1055 | ||
1056 | v850_frame_init_saved_regs (fi); | |
1057 | } | |
1058 | ||
1059 | static void | |
1060 | v850_store_struct_return (CORE_ADDR a, CORE_ADDR b) | |
1061 | { | |
1062 | } | |
1063 | ||
1064 | static CORE_ADDR | |
1065 | v850_target_read_fp (void) | |
1066 | { | |
1067 | return read_register (E_FP_RAW_REGNUM); | |
c906108c SS |
1068 | } |
1069 | ||
6ed14b0e CV |
1070 | static struct gdbarch * |
1071 | v850_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) | |
c906108c | 1072 | { |
435e042a | 1073 | static LONGEST call_dummy_words[1] = { 0 }; |
6ed14b0e CV |
1074 | struct gdbarch_tdep *tdep = NULL; |
1075 | struct gdbarch *gdbarch; | |
1076 | int i; | |
1077 | ||
1078 | /* find a candidate among the list of pre-declared architectures. */ | |
1079 | arches = gdbarch_list_lookup_by_info (arches, &info); | |
1080 | if (arches != NULL) | |
1081 | return (arches->gdbarch); | |
c906108c | 1082 | |
6ed14b0e CV |
1083 | #if 0 |
1084 | tdep = (struct gdbarch_tdep *) xmalloc (sizeof (struct gdbarch_tdep)); | |
1085 | #endif | |
1086 | ||
435e042a | 1087 | /* Change the register names based on the current machine type. */ |
6ed14b0e | 1088 | if (info.bfd_arch_info->arch != bfd_arch_v850) |
c906108c SS |
1089 | return 0; |
1090 | ||
6ed14b0e CV |
1091 | gdbarch = gdbarch_alloc (&info, 0); |
1092 | ||
c906108c SS |
1093 | for (i = 0; v850_processor_type_table[i].regnames != NULL; i++) |
1094 | { | |
6ed14b0e | 1095 | if (v850_processor_type_table[i].mach == info.bfd_arch_info->mach) |
435e042a CV |
1096 | { |
1097 | v850_register_names = v850_processor_type_table[i].regnames; | |
1098 | tm_print_insn_info.mach = info.bfd_arch_info->mach; | |
1099 | break; | |
1100 | } | |
c906108c SS |
1101 | } |
1102 | ||
435e042a CV |
1103 | /* |
1104 | * Basic register fields and methods. | |
1105 | */ | |
1106 | set_gdbarch_num_regs (gdbarch, E_NUM_REGS); | |
1107 | set_gdbarch_num_pseudo_regs (gdbarch, 0); | |
1108 | set_gdbarch_sp_regnum (gdbarch, E_SP_REGNUM); | |
1109 | set_gdbarch_fp_regnum (gdbarch, E_FP_REGNUM); | |
1110 | set_gdbarch_pc_regnum (gdbarch, E_PC_REGNUM); | |
1111 | set_gdbarch_register_name (gdbarch, v850_register_name); | |
1112 | set_gdbarch_register_size (gdbarch, v850_reg_size); | |
1113 | set_gdbarch_register_bytes (gdbarch, E_ALL_REGS_SIZE); | |
1114 | set_gdbarch_register_byte (gdbarch, v850_register_byte); | |
1115 | set_gdbarch_register_raw_size (gdbarch, v850_register_raw_size); | |
1116 | set_gdbarch_max_register_raw_size (gdbarch, v850_reg_size); | |
1117 | set_gdbarch_register_virtual_size (gdbarch, v850_register_raw_size); | |
1118 | set_gdbarch_max_register_virtual_size (gdbarch, v850_reg_size); | |
1119 | set_gdbarch_register_virtual_type (gdbarch, v850_reg_virtual_type); | |
1120 | ||
1121 | set_gdbarch_read_fp (gdbarch, v850_target_read_fp); | |
1122 | ||
1123 | /* | |
1124 | * Frame Info | |
1125 | */ | |
1126 | set_gdbarch_init_extra_frame_info (gdbarch, v850_init_extra_frame_info); | |
1127 | set_gdbarch_frame_init_saved_regs (gdbarch, v850_frame_init_saved_regs); | |
1128 | set_gdbarch_frame_chain (gdbarch, v850_frame_chain); | |
1129 | set_gdbarch_get_saved_register (gdbarch, generic_get_saved_register); | |
1130 | set_gdbarch_saved_pc_after_call (gdbarch, v850_saved_pc_after_call); | |
1131 | set_gdbarch_frame_saved_pc (gdbarch, v850_frame_saved_pc); | |
1132 | set_gdbarch_skip_prologue (gdbarch, v850_skip_prologue); | |
1133 | set_gdbarch_frame_chain_valid (gdbarch, generic_file_frame_chain_valid); | |
1134 | set_gdbarch_frame_args_address (gdbarch, default_frame_address); | |
1135 | set_gdbarch_frame_locals_address (gdbarch, default_frame_address); | |
1136 | ||
1137 | /* | |
1138 | * Miscelany | |
1139 | */ | |
1140 | /* Stack grows up. */ | |
1141 | set_gdbarch_inner_than (gdbarch, core_addr_lessthan); | |
1142 | /* PC stops zero byte after a trap instruction | |
1143 | (which means: exactly on trap instruction). */ | |
1144 | set_gdbarch_decr_pc_after_break (gdbarch, 0); | |
1145 | /* This value is almost never non-zero... */ | |
1146 | set_gdbarch_function_start_offset (gdbarch, 0); | |
1147 | /* This value is almost never non-zero... */ | |
1148 | set_gdbarch_frame_args_skip (gdbarch, 0); | |
1149 | /* OK to default this value to 'unknown'. */ | |
1150 | set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown); | |
1151 | /* W/o prototype, coerce float args to double. */ | |
1152 | set_gdbarch_coerce_float_to_double (gdbarch, standard_coerce_float_to_double); | |
1153 | ||
1154 | /* | |
1155 | * Call Dummies | |
1156 | * | |
1157 | * These values and methods are used when gdb calls a target function. */ | |
1158 | set_gdbarch_use_generic_dummy_frames (gdbarch, 1); | |
1159 | set_gdbarch_push_dummy_frame (gdbarch, generic_push_dummy_frame); | |
1160 | set_gdbarch_push_return_address (gdbarch, v850_push_return_address); | |
1161 | set_gdbarch_extract_return_value (gdbarch, v850_extract_return_value); | |
1162 | set_gdbarch_push_arguments (gdbarch, v850_push_arguments); | |
1163 | set_gdbarch_pop_frame (gdbarch, v850_pop_frame); | |
1164 | set_gdbarch_store_struct_return (gdbarch, v850_store_struct_return); | |
1165 | set_gdbarch_store_return_value (gdbarch, v850_store_return_value); | |
1166 | set_gdbarch_extract_struct_value_address (gdbarch, v850_extract_struct_value_address); | |
1167 | set_gdbarch_use_struct_convention (gdbarch, v850_use_struct_convention); | |
1168 | set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT); | |
1169 | set_gdbarch_call_dummy_address (gdbarch, entry_point_address); | |
1170 | set_gdbarch_call_dummy_start_offset (gdbarch, 0); | |
1171 | set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 0); | |
1172 | set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1); | |
1173 | set_gdbarch_call_dummy_length (gdbarch, 0); | |
1174 | set_gdbarch_pc_in_call_dummy (gdbarch, generic_pc_in_call_dummy); | |
1175 | set_gdbarch_call_dummy_p (gdbarch, 1); | |
1176 | set_gdbarch_call_dummy_words (gdbarch, call_dummy_nil); | |
1177 | set_gdbarch_sizeof_call_dummy_words (gdbarch, 0); | |
1178 | set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0); | |
1179 | /* set_gdbarch_call_dummy_stack_adjust */ | |
1180 | set_gdbarch_fix_call_dummy (gdbarch, v850_fix_call_dummy); | |
1181 | set_gdbarch_breakpoint_from_pc (gdbarch, v850_breakpoint_from_pc); | |
1182 | ||
1183 | set_gdbarch_int_bit (gdbarch, 4 * TARGET_CHAR_BIT); | |
1184 | set_gdbarch_ptr_bit (gdbarch, 4 * TARGET_CHAR_BIT); | |
1185 | set_gdbarch_addr_bit (gdbarch, 4 * TARGET_CHAR_BIT); | |
1186 | set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT); | |
1187 | ||
1188 | set_gdbarch_extra_stack_alignment_needed (gdbarch, 0); | |
1189 | ||
6ed14b0e | 1190 | return gdbarch; |
c906108c SS |
1191 | } |
1192 | ||
1193 | void | |
fba45db2 | 1194 | _initialize_v850_tdep (void) |
c906108c SS |
1195 | { |
1196 | tm_print_insn = print_insn_v850; | |
6ed14b0e | 1197 | register_gdbarch_init (bfd_arch_v850, v850_gdbarch_init); |
c906108c | 1198 | } |