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9d24df82 HAQ |
1 | /* Target-dependent code for the CSKY architecture, for GDB. |
2 | ||
213516ef | 3 | Copyright (C) 2010-2023 Free Software Foundation, Inc. |
9d24df82 HAQ |
4 | |
5 | Contributed by C-SKY Microsystems and Mentor Graphics. | |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 3 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
21 | ||
22 | #include "defs.h" | |
268a13a5 | 23 | #include "gdbsupport/gdb_assert.h" |
9d24df82 | 24 | #include "frame.h" |
d55e5aa6 | 25 | #include "inferior.h" |
4de283e4 TT |
26 | #include "symtab.h" |
27 | #include "value.h" | |
28 | #include "gdbcmd.h" | |
d55e5aa6 | 29 | #include "language.h" |
4de283e4 TT |
30 | #include "gdbcore.h" |
31 | #include "symfile.h" | |
d55e5aa6 | 32 | #include "objfiles.h" |
4de283e4 TT |
33 | #include "gdbtypes.h" |
34 | #include "target.h" | |
35 | #include "arch-utils.h" | |
d55e5aa6 | 36 | #include "regcache.h" |
4de283e4 TT |
37 | #include "osabi.h" |
38 | #include "block.h" | |
9d24df82 | 39 | #include "reggroups.h" |
4de283e4 TT |
40 | #include "elf/csky.h" |
41 | #include "elf-bfd.h" | |
d55e5aa6 | 42 | #include "symcat.h" |
4de283e4 TT |
43 | #include "sim-regno.h" |
44 | #include "dis-asm.h" | |
45 | #include "frame-unwind.h" | |
46 | #include "frame-base.h" | |
d55e5aa6 | 47 | #include "trad-frame.h" |
4de283e4 TT |
48 | #include "infcall.h" |
49 | #include "floatformat.h" | |
50 | #include "remote.h" | |
51 | #include "target-descriptions.h" | |
82ca8957 | 52 | #include "dwarf2/frame.h" |
9d24df82 HAQ |
53 | #include "user-regs.h" |
54 | #include "valprint.h" | |
4de283e4 TT |
55 | #include "csky-tdep.h" |
56 | #include "regset.h" | |
57 | #include "opcode/csky.h" | |
58 | #include <algorithm> | |
59 | #include <vector> | |
9d24df82 HAQ |
60 | |
61 | /* Control debugging information emitted in this file. */ | |
e3940312 | 62 | |
491144b5 | 63 | static bool csky_debug = false; |
9d24df82 | 64 | |
e7fe1011 AB |
65 | static const reggroup *cr_reggroup; |
66 | static const reggroup *fr_reggroup; | |
67 | static const reggroup *vr_reggroup; | |
68 | static const reggroup *mmu_reggroup; | |
69 | static const reggroup *prof_reggroup; | |
9d24df82 | 70 | |
afd53c3c JL |
71 | static const char *csky_supported_tdesc_feature_names[] = { |
72 | (const char *)"org.gnu.csky.abiv2.gpr", | |
73 | (const char *)"org.gnu.csky.abiv2.fpu", | |
74 | (const char *)"org.gnu.csky.abiv2.cr", | |
75 | (const char *)"org.gnu.csky.abiv2.fvcr", | |
76 | (const char *)"org.gnu.csky.abiv2.mmu", | |
77 | (const char *)"org.gnu.csky.abiv2.tee", | |
78 | (const char *)"org.gnu.csky.abiv2.fpu2", | |
79 | (const char *)"org.gnu.csky.abiv2.bank0", | |
80 | (const char *)"org.gnu.csky.abiv2.bank1", | |
81 | (const char *)"org.gnu.csky.abiv2.bank2", | |
82 | (const char *)"org.gnu.csky.abiv2.bank3", | |
83 | (const char *)"org.gnu.csky.abiv2.bank4", | |
84 | (const char *)"org.gnu.csky.abiv2.bank5", | |
85 | (const char *)"org.gnu.csky.abiv2.bank6", | |
86 | (const char *)"org.gnu.csky.abiv2.bank7", | |
87 | (const char *)"org.gnu.csky.abiv2.bank8", | |
88 | (const char *)"org.gnu.csky.abiv2.bank9", | |
89 | (const char *)"org.gnu.csky.abiv2.bank10", | |
90 | (const char *)"org.gnu.csky.abiv2.bank11", | |
91 | (const char *)"org.gnu.csky.abiv2.bank12", | |
92 | (const char *)"org.gnu.csky.abiv2.bank13", | |
93 | (const char *)"org.gnu.csky.abiv2.bank14", | |
94 | (const char *)"org.gnu.csky.abiv2.bank15", | |
95 | (const char *)"org.gnu.csky.abiv2.bank16", | |
96 | (const char *)"org.gnu.csky.abiv2.bank17", | |
97 | (const char *)"org.gnu.csky.abiv2.bank18", | |
98 | (const char *)"org.gnu.csky.abiv2.bank19", | |
99 | (const char *)"org.gnu.csky.abiv2.bank20", | |
100 | (const char *)"org.gnu.csky.abiv2.bank21", | |
101 | (const char *)"org.gnu.csky.abiv2.bank22", | |
102 | (const char *)"org.gnu.csky.abiv2.bank23", | |
103 | (const char *)"org.gnu.csky.abiv2.bank24", | |
104 | (const char *)"org.gnu.csky.abiv2.bank25", | |
105 | (const char *)"org.gnu.csky.abiv2.bank26", | |
106 | (const char *)"org.gnu.csky.abiv2.bank27", | |
107 | (const char *)"org.gnu.csky.abiv2.bank28", | |
108 | (const char *)"org.gnu.csky.abiv2.bank29", | |
109 | (const char *)"org.gnu.csky.abiv2.bank30", | |
110 | (const char *)"org.gnu.csky.abiv2.bank31" | |
111 | }; | |
112 | ||
113 | struct csky_supported_tdesc_register | |
114 | { | |
115 | char name[16]; | |
116 | int num; | |
117 | }; | |
118 | ||
119 | static const struct csky_supported_tdesc_register csky_supported_gpr_regs[] = { | |
120 | {"r0", 0}, | |
121 | {"r1", 1}, | |
122 | {"r2", 2}, | |
123 | {"r3", 3}, | |
124 | {"r4", 4}, | |
125 | {"r5", 5}, | |
126 | {"r6", 6}, | |
127 | {"r7", 7}, | |
128 | {"r8", 8}, | |
129 | {"r9", 9}, | |
130 | {"r10", 10}, | |
131 | {"r11", 11}, | |
132 | {"r12", 12}, | |
133 | {"r13", 13}, | |
134 | {"r14", 14}, | |
135 | {"r15", 15}, | |
136 | {"r16", 16}, | |
137 | {"r17", 17}, | |
138 | {"r18", 18}, | |
139 | {"r19", 19}, | |
140 | {"r20", 20}, | |
141 | {"r21", 21}, | |
142 | {"r22", 22}, | |
143 | {"r23", 23}, | |
144 | {"r24", 24}, | |
145 | {"r25", 25}, | |
146 | {"r26", 26}, | |
147 | {"r27", 27}, | |
148 | {"r28", 28}, | |
149 | {"r28", 28}, | |
150 | {"r29", 29}, | |
151 | {"r30", 30}, | |
152 | {"r31", 31}, | |
153 | {"hi", CSKY_HI_REGNUM}, | |
154 | {"lo", CSKY_LO_REGNUM}, | |
155 | {"pc", CSKY_PC_REGNUM} | |
156 | }; | |
157 | ||
158 | static const struct csky_supported_tdesc_register csky_supported_fpu_regs[] = { | |
159 | /* fr0~fr15. */ | |
160 | {"fr0", CSKY_FR0_REGNUM + 0}, | |
161 | {"fr1", CSKY_FR0_REGNUM + 1}, | |
162 | {"fr2", CSKY_FR0_REGNUM + 2}, | |
163 | {"fr3", CSKY_FR0_REGNUM + 3}, | |
164 | {"fr4", CSKY_FR0_REGNUM + 4}, | |
165 | {"fr5", CSKY_FR0_REGNUM + 5}, | |
166 | {"fr6", CSKY_FR0_REGNUM + 6}, | |
167 | {"fr7", CSKY_FR0_REGNUM + 7}, | |
168 | {"fr8", CSKY_FR0_REGNUM + 8}, | |
169 | {"fr9", CSKY_FR0_REGNUM + 9}, | |
170 | {"fr10", CSKY_FR0_REGNUM + 10}, | |
171 | {"fr11", CSKY_FR0_REGNUM + 11}, | |
172 | {"fr12", CSKY_FR0_REGNUM + 12}, | |
173 | {"fr13", CSKY_FR0_REGNUM + 13}, | |
174 | {"fr14", CSKY_FR0_REGNUM + 14}, | |
175 | {"fr15", CSKY_FR0_REGNUM + 15}, | |
176 | /* fr16~fr31. */ | |
177 | {"fr16", CSKY_FR16_REGNUM + 0}, | |
178 | {"fr17", CSKY_FR16_REGNUM + 1}, | |
179 | {"fr18", CSKY_FR16_REGNUM + 2}, | |
180 | {"fr19", CSKY_FR16_REGNUM + 3}, | |
181 | {"fr20", CSKY_FR16_REGNUM + 4}, | |
182 | {"fr21", CSKY_FR16_REGNUM + 5}, | |
183 | {"fr22", CSKY_FR16_REGNUM + 6}, | |
184 | {"fr23", CSKY_FR16_REGNUM + 7}, | |
185 | {"fr24", CSKY_FR16_REGNUM + 8}, | |
186 | {"fr25", CSKY_FR16_REGNUM + 9}, | |
187 | {"fr26", CSKY_FR16_REGNUM + 10}, | |
188 | {"fr27", CSKY_FR16_REGNUM + 11}, | |
189 | {"fr28", CSKY_FR16_REGNUM + 12}, | |
190 | {"fr29", CSKY_FR16_REGNUM + 13}, | |
191 | {"fr30", CSKY_FR16_REGNUM + 14}, | |
192 | {"fr31", CSKY_FR16_REGNUM + 15}, | |
193 | /* vr0~vr15. */ | |
194 | {"vr0", CSKY_VR0_REGNUM + 0}, | |
195 | {"vr1", CSKY_VR0_REGNUM + 1}, | |
196 | {"vr2", CSKY_VR0_REGNUM + 2}, | |
197 | {"vr3", CSKY_VR0_REGNUM + 3}, | |
198 | {"vr4", CSKY_VR0_REGNUM + 4}, | |
199 | {"vr5", CSKY_VR0_REGNUM + 5}, | |
200 | {"vr6", CSKY_VR0_REGNUM + 6}, | |
201 | {"vr7", CSKY_VR0_REGNUM + 7}, | |
202 | {"vr8", CSKY_VR0_REGNUM + 8}, | |
203 | {"vr9", CSKY_VR0_REGNUM + 9}, | |
204 | {"vr10", CSKY_VR0_REGNUM + 10}, | |
205 | {"vr11", CSKY_VR0_REGNUM + 11}, | |
206 | {"vr12", CSKY_VR0_REGNUM + 12}, | |
207 | {"vr13", CSKY_VR0_REGNUM + 13}, | |
208 | {"vr14", CSKY_VR0_REGNUM + 14}, | |
209 | {"vr15", CSKY_VR0_REGNUM + 15}, | |
210 | /* fpu control registers. */ | |
211 | {"fcr", CSKY_FCR_REGNUM + 0}, | |
212 | {"fid", CSKY_FCR_REGNUM + 1}, | |
213 | {"fesr", CSKY_FCR_REGNUM + 2}, | |
214 | }; | |
215 | ||
216 | static const struct csky_supported_tdesc_register csky_supported_ar_regs[] = { | |
217 | {"ar0", CSKY_AR0_REGNUM + 0}, | |
218 | {"ar1", CSKY_AR0_REGNUM + 1}, | |
219 | {"ar2", CSKY_AR0_REGNUM + 2}, | |
220 | {"ar3", CSKY_AR0_REGNUM + 3}, | |
221 | {"ar4", CSKY_AR0_REGNUM + 4}, | |
222 | {"ar5", CSKY_AR0_REGNUM + 5}, | |
223 | {"ar6", CSKY_AR0_REGNUM + 6}, | |
224 | {"ar7", CSKY_AR0_REGNUM + 7}, | |
225 | {"ar8", CSKY_AR0_REGNUM + 8}, | |
226 | {"ar9", CSKY_AR0_REGNUM + 9}, | |
227 | {"ar10", CSKY_AR0_REGNUM + 10}, | |
228 | {"ar11", CSKY_AR0_REGNUM + 11}, | |
229 | {"ar12", CSKY_AR0_REGNUM + 12}, | |
230 | {"ar13", CSKY_AR0_REGNUM + 13}, | |
231 | {"ar14", CSKY_AR0_REGNUM + 14}, | |
232 | {"ar15", CSKY_AR0_REGNUM + 15}, | |
233 | }; | |
234 | ||
235 | static const struct csky_supported_tdesc_register csky_supported_bank0_regs[] = { | |
236 | {"cr0", CSKY_CR0_REGNUM + 0}, | |
237 | {"cr1", CSKY_CR0_REGNUM + 1}, | |
238 | {"cr2", CSKY_CR0_REGNUM + 2}, | |
239 | {"cr3", CSKY_CR0_REGNUM + 3}, | |
240 | {"cr4", CSKY_CR0_REGNUM + 4}, | |
241 | {"cr5", CSKY_CR0_REGNUM + 5}, | |
242 | {"cr6", CSKY_CR0_REGNUM + 6}, | |
243 | {"cr7", CSKY_CR0_REGNUM + 7}, | |
244 | {"cr8", CSKY_CR0_REGNUM + 8}, | |
245 | {"cr9", CSKY_CR0_REGNUM + 9}, | |
246 | {"cr10", CSKY_CR0_REGNUM + 10}, | |
247 | {"cr11", CSKY_CR0_REGNUM + 11}, | |
248 | {"cr12", CSKY_CR0_REGNUM + 12}, | |
249 | {"cr13", CSKY_CR0_REGNUM + 13}, | |
250 | {"cr14", CSKY_CR0_REGNUM + 14}, | |
251 | {"cr15", CSKY_CR0_REGNUM + 15}, | |
252 | {"cr16", CSKY_CR0_REGNUM + 16}, | |
253 | {"cr17", CSKY_CR0_REGNUM + 17}, | |
254 | {"cr18", CSKY_CR0_REGNUM + 18}, | |
255 | {"cr19", CSKY_CR0_REGNUM + 19}, | |
256 | {"cr20", CSKY_CR0_REGNUM + 20}, | |
257 | {"cr21", CSKY_CR0_REGNUM + 21}, | |
258 | {"cr22", CSKY_CR0_REGNUM + 22}, | |
259 | {"cr23", CSKY_CR0_REGNUM + 23}, | |
260 | {"cr24", CSKY_CR0_REGNUM + 24}, | |
261 | {"cr25", CSKY_CR0_REGNUM + 25}, | |
262 | {"cr26", CSKY_CR0_REGNUM + 26}, | |
263 | {"cr27", CSKY_CR0_REGNUM + 27}, | |
264 | {"cr28", CSKY_CR0_REGNUM + 28}, | |
265 | {"cr29", CSKY_CR0_REGNUM + 29}, | |
266 | {"cr30", CSKY_CR0_REGNUM + 30}, | |
267 | {"cr31", CSKY_CR0_REGNUM + 31} | |
268 | }; | |
269 | ||
270 | static const struct csky_supported_tdesc_register csky_supported_mmu_regs[] = { | |
271 | {"mcr0", 128}, | |
272 | {"mcr2", 129}, | |
273 | {"mcr3", 130}, | |
274 | {"mcr4", 131}, | |
275 | {"mcr6", 132}, | |
276 | {"mcr8", 133}, | |
277 | {"mcr29", 134}, | |
278 | {"mcr30", 135}, | |
279 | {"mcr31", 136} | |
280 | }; | |
281 | ||
282 | static const struct csky_supported_tdesc_register csky_supported_bank15_regs[] = { | |
283 | {"cp15cp1", 253}, | |
284 | {"cp15cp5", 254}, | |
285 | {"cp15cp7", 255}, | |
286 | {"cp15cp9", 256}, | |
287 | {"cp15cp10", 257}, | |
288 | {"cp15cp11", 258}, | |
289 | {"cp15cp12", 259}, | |
290 | {"cp15cp13", 260}, | |
291 | {"cp15cp14", 261}, | |
292 | {"cp15cp15", 262}, | |
293 | {"cp15cp16", 263}, | |
294 | {"cp15cp17", 264}, | |
295 | {"cp15cp18", 265}, | |
296 | {"cp15cp19", 266}, | |
297 | {"cp15cp20", 267}, | |
298 | {"cp15cp21", 268}, | |
299 | {"cp15cp22", 269}, | |
300 | {"cp15cp23", 270}, | |
301 | {"cp15cp24", 271}, | |
302 | {"cp15cp25", 272}, | |
303 | {"cp15cp26", 273}, | |
304 | {"cp15cp27", 274}, | |
305 | {"cp15cp28", 275}, | |
306 | }; | |
307 | ||
308 | static const struct csky_supported_tdesc_register csky_supported_alias_regs[] = { | |
309 | /* Alias register names for Bank0. */ | |
310 | {"psr", CSKY_CR0_REGNUM + 0}, | |
311 | {"vbr", CSKY_CR0_REGNUM + 1}, | |
312 | {"epsr", CSKY_CR0_REGNUM + 2}, | |
313 | {"fpsr", CSKY_CR0_REGNUM + 3}, | |
314 | {"epc", CSKY_CR0_REGNUM + 4}, | |
315 | {"fpc", CSKY_CR0_REGNUM + 5}, | |
316 | {"ss0", CSKY_CR0_REGNUM + 6}, | |
317 | {"ss1", CSKY_CR0_REGNUM + 7}, | |
318 | {"ss2", CSKY_CR0_REGNUM + 8}, | |
319 | {"ss3", CSKY_CR0_REGNUM + 9}, | |
320 | {"ss4", CSKY_CR0_REGNUM + 10}, | |
321 | {"gcr", CSKY_CR0_REGNUM + 11}, | |
322 | {"gsr", CSKY_CR0_REGNUM + 12}, | |
323 | {"cpuid", CSKY_CR0_REGNUM + 13}, | |
324 | {"ccr", CSKY_CR0_REGNUM + 18}, | |
325 | {"capr", CSKY_CR0_REGNUM + 19}, | |
326 | {"pacr", CSKY_CR0_REGNUM + 20}, | |
327 | {"prsr", CSKY_CR0_REGNUM + 21}, | |
328 | {"chr", CSKY_CR0_REGNUM + 31}, | |
329 | /* Alias register names for MMU. */ | |
330 | {"mir", 128}, | |
331 | {"mel0", 129}, | |
332 | {"mel1", 130}, | |
333 | {"meh", 131}, | |
334 | {"mpr", 132}, | |
335 | {"mcir", 133}, | |
336 | {"mpgd", 134}, | |
337 | {"msa0", 135}, | |
338 | {"msa1", 136}, | |
339 | /* Alias register names for Bank1. */ | |
340 | {"ebr", 190}, | |
341 | {"errlc", 195}, | |
342 | {"erraddr", 196}, | |
343 | {"errsts", 197}, | |
344 | {"errinj", 198}, | |
345 | {"usp", 203}, | |
346 | {"int_sp", 204}, | |
347 | {"itcmcr", 211}, | |
348 | {"dtcmcr", 212}, | |
349 | {"cindex", 215}, | |
350 | {"cdata0", 216}, | |
351 | {"cdata1", 217}, | |
352 | {"cdata2", 218}, | |
353 | {"cins", 220}, | |
354 | /* Alias register names for Bank3. */ | |
355 | {"sepsr", 221}, | |
356 | {"t_wssr", 221}, | |
357 | {"sevbr", 222}, | |
358 | {"t_wrcr", 222}, | |
359 | {"seepsr", 223}, | |
360 | {"seepc", 225}, | |
361 | {"nsssp", 227}, | |
362 | {"t_usp", 228}, | |
363 | {"dcr", 229}, | |
364 | {"t_pcr", 230}, | |
365 | }; | |
366 | ||
e3940312 JL |
367 | /* Functions declaration. */ |
368 | ||
369 | static const char * | |
370 | csky_pseudo_register_name (struct gdbarch *gdbarch, int regno); | |
371 | ||
afd53c3c | 372 | /* Get csky supported registers's count for tdesc xml. */ |
e3940312 | 373 | |
afd53c3c JL |
374 | static int |
375 | csky_get_supported_tdesc_registers_count() | |
376 | { | |
377 | int count = 0; | |
378 | count += ARRAY_SIZE (csky_supported_gpr_regs); | |
379 | count += ARRAY_SIZE (csky_supported_fpu_regs); | |
380 | count += ARRAY_SIZE (csky_supported_ar_regs); | |
381 | count += ARRAY_SIZE (csky_supported_bank0_regs); | |
382 | count += ARRAY_SIZE (csky_supported_mmu_regs); | |
383 | count += ARRAY_SIZE (csky_supported_bank15_regs); | |
384 | count += ARRAY_SIZE (csky_supported_alias_regs); | |
385 | /* Bank1~Bank14, Bank16~Bank31. */ | |
386 | count += 32 * (14 + 16); | |
387 | return count; | |
388 | } | |
389 | ||
390 | /* Return a supported register according to index. */ | |
e3940312 | 391 | |
afd53c3c JL |
392 | static const struct csky_supported_tdesc_register * |
393 | csky_get_supported_register_by_index (int index) | |
394 | { | |
395 | static struct csky_supported_tdesc_register tdesc_reg; | |
396 | int count = 0; | |
397 | int multi, remain; | |
398 | int count_gpr = ARRAY_SIZE (csky_supported_gpr_regs); | |
399 | int count_fpu = ARRAY_SIZE (csky_supported_fpu_regs); | |
400 | int count_ar = ARRAY_SIZE (csky_supported_ar_regs); | |
401 | int count_bank0 = ARRAY_SIZE (csky_supported_bank0_regs); | |
402 | int count_mmu = ARRAY_SIZE (csky_supported_mmu_regs); | |
403 | int count_bank15 = ARRAY_SIZE (csky_supported_bank15_regs); | |
404 | int count_alias = ARRAY_SIZE (csky_supported_alias_regs); | |
405 | ||
406 | count = count_gpr; | |
407 | if (index < count) | |
408 | return &csky_supported_gpr_regs[index]; | |
409 | if (index < (count + count_fpu)) | |
410 | return &csky_supported_fpu_regs[index - count]; | |
411 | count += count_fpu; | |
412 | if (index < (count + count_ar)) | |
413 | return &csky_supported_ar_regs[index - count]; | |
414 | count += count_ar; | |
415 | if (index < (count + count_bank0)) | |
416 | return &csky_supported_bank0_regs[index - count]; | |
417 | count += count_bank0; | |
418 | if (index < (count + count_mmu)) | |
419 | return &csky_supported_mmu_regs[index - count]; | |
420 | count += count_mmu; | |
421 | if (index < (count + count_bank15)) | |
422 | return &csky_supported_bank15_regs[index - count]; | |
423 | count += count_bank15; | |
424 | if (index < (count + count_alias)) | |
425 | return &csky_supported_alias_regs[index - count]; | |
426 | count += count_alias; | |
427 | index -= count; | |
428 | multi = index / 32; | |
429 | remain = index % 32; | |
430 | switch (multi) | |
431 | { | |
432 | case 0: /* Bank1. */ | |
433 | { | |
434 | sprintf (tdesc_reg.name, "cp1cr%d", remain); | |
435 | tdesc_reg.num = 189 + remain; | |
436 | } | |
437 | break; | |
438 | case 1: /* Bank2. */ | |
439 | { | |
440 | sprintf (tdesc_reg.name, "cp2cr%d", remain); | |
441 | tdesc_reg.num = 276 + remain; | |
442 | } | |
443 | break; | |
444 | case 2: /* Bank3. */ | |
445 | { | |
446 | sprintf (tdesc_reg.name, "cp3cr%d", remain); | |
447 | tdesc_reg.num = 221 + remain; | |
448 | } | |
449 | break; | |
450 | case 3: /* Bank4. */ | |
451 | case 4: /* Bank5. */ | |
452 | case 5: /* Bank6. */ | |
453 | case 6: /* Bank7. */ | |
454 | case 7: /* Bank8. */ | |
455 | case 8: /* Bank9. */ | |
456 | case 9: /* Bank10. */ | |
457 | case 10: /* Bank11. */ | |
458 | case 11: /* Bank12. */ | |
459 | case 12: /* Bank13. */ | |
460 | case 13: /* Bank14. */ | |
461 | { | |
462 | /* Regitsers in Bank4~14 have continuous regno with start 308. */ | |
463 | sprintf (tdesc_reg.name, "cp%dcr%d", (multi + 1), remain); | |
464 | tdesc_reg.num = 308 + ((multi - 3) * 32) + remain; | |
465 | } | |
466 | break; | |
467 | case 14: /* Bank16. */ | |
468 | case 15: /* Bank17. */ | |
469 | case 16: /* Bank18. */ | |
470 | case 17: /* Bank19. */ | |
471 | case 18: /* Bank20. */ | |
472 | case 19: /* Bank21. */ | |
473 | case 20: /* Bank22. */ | |
474 | case 21: /* Bank23. */ | |
475 | case 22: /* Bank24. */ | |
476 | case 23: /* Bank25. */ | |
477 | case 24: /* Bank26. */ | |
478 | case 25: /* Bank27. */ | |
479 | case 26: /* Bank28. */ | |
480 | case 27: /* Bank29. */ | |
481 | case 28: /* Bank30. */ | |
482 | case 29: /* Bank31. */ | |
483 | { | |
484 | /* Regitsers in Bank16~31 have continuous regno with start 660. */ | |
485 | sprintf (tdesc_reg.name, "cp%dcr%d", (multi + 2), remain); | |
486 | tdesc_reg.num = 660 + ((multi - 14) * 32) + remain; | |
487 | } | |
488 | break; | |
489 | default: | |
490 | return NULL; | |
491 | } | |
492 | return &tdesc_reg; | |
493 | } | |
494 | ||
9d24df82 HAQ |
495 | /* Convenience function to print debug messages in prologue analysis. */ |
496 | ||
497 | static void | |
498 | print_savedreg_msg (int regno, int offsets[], bool print_continuing) | |
499 | { | |
6cb06a8c TT |
500 | gdb_printf (gdb_stdlog, "csky: r%d saved at offset 0x%x\n", |
501 | regno, offsets[regno]); | |
9d24df82 | 502 | if (print_continuing) |
6cb06a8c | 503 | gdb_printf (gdb_stdlog, "csky: continuing\n"); |
9d24df82 HAQ |
504 | } |
505 | ||
506 | /* Check whether the instruction at ADDR is 16-bit or not. */ | |
507 | ||
508 | static int | |
509 | csky_pc_is_csky16 (struct gdbarch *gdbarch, CORE_ADDR addr) | |
510 | { | |
511 | gdb_byte target_mem[2]; | |
512 | int status; | |
513 | unsigned int insn; | |
514 | int ret = 1; | |
515 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
516 | ||
517 | status = target_read_memory (addr, target_mem, 2); | |
518 | /* Assume a 16-bit instruction if we can't read memory. */ | |
519 | if (status) | |
520 | return 1; | |
521 | ||
522 | /* Get instruction from memory. */ | |
523 | insn = extract_unsigned_integer (target_mem, 2, byte_order); | |
524 | if ((insn & CSKY_32_INSN_MASK) == CSKY_32_INSN_MASK) | |
525 | ret = 0; | |
526 | else if (insn == CSKY_BKPT_INSN) | |
527 | { | |
528 | /* Check for 32-bit bkpt instruction which is all 0. */ | |
529 | status = target_read_memory (addr + 2, target_mem, 2); | |
530 | if (status) | |
531 | return 1; | |
532 | ||
533 | insn = extract_unsigned_integer (target_mem, 2, byte_order); | |
534 | if (insn == CSKY_BKPT_INSN) | |
535 | ret = 0; | |
536 | } | |
537 | return ret; | |
538 | } | |
539 | ||
540 | /* Get one instruction at ADDR and store it in INSN. Return 2 for | |
541 | a 16-bit instruction or 4 for a 32-bit instruction. */ | |
542 | ||
543 | static int | |
544 | csky_get_insn (struct gdbarch *gdbarch, CORE_ADDR addr, unsigned int *insn) | |
545 | { | |
546 | gdb_byte target_mem[2]; | |
547 | unsigned int insn_type; | |
548 | int status; | |
549 | int insn_len = 2; | |
550 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
551 | ||
552 | status = target_read_memory (addr, target_mem, 2); | |
553 | if (status) | |
554 | memory_error (TARGET_XFER_E_IO, addr); | |
555 | ||
556 | insn_type = extract_unsigned_integer (target_mem, 2, byte_order); | |
557 | if (CSKY_32_INSN_MASK == (insn_type & CSKY_32_INSN_MASK)) | |
558 | { | |
559 | status = target_read_memory (addr + 2, target_mem, 2); | |
560 | if (status) | |
561 | memory_error (TARGET_XFER_E_IO, addr); | |
562 | insn_type = ((insn_type << 16) | |
563 | | extract_unsigned_integer (target_mem, 2, byte_order)); | |
564 | insn_len = 4; | |
565 | } | |
566 | *insn = insn_type; | |
567 | return insn_len; | |
568 | } | |
569 | ||
570 | /* Implement the read_pc gdbarch method. */ | |
571 | ||
572 | static CORE_ADDR | |
573 | csky_read_pc (readable_regcache *regcache) | |
574 | { | |
575 | ULONGEST pc; | |
576 | regcache->cooked_read (CSKY_PC_REGNUM, &pc); | |
577 | return pc; | |
578 | } | |
579 | ||
580 | /* Implement the write_pc gdbarch method. */ | |
581 | ||
582 | static void | |
583 | csky_write_pc (regcache *regcache, CORE_ADDR val) | |
584 | { | |
585 | regcache_cooked_write_unsigned (regcache, CSKY_PC_REGNUM, val); | |
586 | } | |
587 | ||
9d24df82 HAQ |
588 | /* C-Sky ABI register names. */ |
589 | ||
27087b7f | 590 | static const char * const csky_register_names[] = |
9d24df82 HAQ |
591 | { |
592 | /* General registers 0 - 31. */ | |
593 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
594 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", | |
595 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
596 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
597 | ||
598 | /* DSP hilo registers 36 and 37. */ | |
599 | "", "", "", "", "hi", "lo", "", "", | |
600 | ||
601 | /* FPU/VPU general registers 40 - 71. */ | |
602 | "fr0", "fr1", "fr2", "fr3", "fr4", "fr5", "fr6", "fr7", | |
603 | "fr8", "fr9", "fr10", "fr11", "fr12", "fr13", "fr14", "fr15", | |
604 | "vr0", "vr1", "vr2", "vr3", "vr4", "vr5", "vr6", "vr7", | |
605 | "vr8", "vr9", "vr10", "vr11", "vr12", "vr13", "vr14", "vr15", | |
606 | ||
607 | /* Program counter 72. */ | |
608 | "pc", | |
609 | ||
610 | /* Optional registers (ar) 73 - 88. */ | |
611 | "ar0", "ar1", "ar2", "ar3", "ar4", "ar5", "ar6", "ar7", | |
612 | "ar8", "ar9", "ar10", "ar11", "ar12", "ar13", "ar14", "ar15", | |
613 | ||
614 | /* Control registers (cr) 89 - 119. */ | |
615 | "psr", "vbr", "epsr", "fpsr", "epc", "fpc", "ss0", "ss1", | |
616 | "ss2", "ss3", "ss4", "gcr", "gsr", "cr13", "cr14", "cr15", | |
617 | "cr16", "cr17", "cr18", "cr19", "cr20", "cr21", "cr22", "cr23", | |
618 | "cr24", "cr25", "cr26", "cr27", "cr28", "cr29", "cr30", "cr31", | |
619 | ||
620 | /* FPU/VPU control registers 121 ~ 123. */ | |
621 | /* User sp 127. */ | |
622 | "fid", "fcr", "fesr", "", "", "", "usp", | |
623 | ||
624 | /* MMU control registers: 128 - 136. */ | |
625 | "mcr0", "mcr2", "mcr3", "mcr4", "mcr6", "mcr8", "mcr29", "mcr30", | |
626 | "mcr31", "", "", "", | |
627 | ||
628 | /* Profiling control registers 140 - 143. */ | |
629 | /* Profiling software general registers 144 - 157. */ | |
630 | "profcr0", "profcr1", "profcr2", "profcr3", "profsgr0", "profsgr1", | |
631 | "profsgr2", "profsgr3", "profsgr4", "profsgr5", "profsgr6", "profsgr7", | |
632 | "profsgr8", "profsgr9", "profsgr10","profsgr11","profsgr12", "profsgr13", | |
633 | "", "", | |
634 | ||
635 | /* Profiling architecture general registers 160 - 174. */ | |
636 | "profagr0", "profagr1", "profagr2", "profagr3", "profagr4", "profagr5", | |
637 | "profagr6", "profagr7", "profagr8", "profagr9", "profagr10","profagr11", | |
638 | "profagr12","profagr13","profagr14", "", | |
639 | ||
640 | /* Profiling extension general registers 176 - 188. */ | |
641 | "profxgr0", "profxgr1", "profxgr2", "profxgr3", "profxgr4", "profxgr5", | |
642 | "profxgr6", "profxgr7", "profxgr8", "profxgr9", "profxgr10","profxgr11", | |
643 | "profxgr12", | |
644 | ||
645 | /* Control registers in bank1. */ | |
646 | "", "", "", "", "", "", "", "", | |
647 | "", "", "", "", "", "", "", "", | |
648 | "cp1cr16", "cp1cr17", "cp1cr18", "cp1cr19", "cp1cr20", "", "", "", | |
649 | "", "", "", "", "", "", "", "", | |
650 | ||
651 | /* Control registers in bank3 (ICE). */ | |
652 | "sepsr", "sevbr", "seepsr", "", "seepc", "", "nsssp", "seusp", | |
653 | "sedcr", "", "", "", "", "", "", "", | |
654 | "", "", "", "", "", "", "", "", | |
655 | "", "", "", "", "", "", "", "" | |
656 | }; | |
657 | ||
658 | /* Implement the register_name gdbarch method. */ | |
659 | ||
660 | static const char * | |
661 | csky_register_name (struct gdbarch *gdbarch, int reg_nr) | |
662 | { | |
7ac20d65 | 663 | if (reg_nr >= gdbarch_num_regs (gdbarch)) |
e3940312 JL |
664 | return csky_pseudo_register_name (gdbarch, reg_nr); |
665 | ||
666 | if (tdesc_has_registers (gdbarch_target_desc (gdbarch))) | |
667 | return tdesc_register_name (gdbarch, reg_nr); | |
668 | ||
9d24df82 HAQ |
669 | return csky_register_names[reg_nr]; |
670 | } | |
671 | ||
672 | /* Construct vector type for vrx registers. */ | |
673 | ||
674 | static struct type * | |
675 | csky_vector_type (struct gdbarch *gdbarch) | |
676 | { | |
677 | const struct builtin_type *bt = builtin_type (gdbarch); | |
678 | ||
679 | struct type *t; | |
680 | ||
681 | t = arch_composite_type (gdbarch, "__gdb_builtin_type_vec128i", | |
682 | TYPE_CODE_UNION); | |
683 | ||
684 | append_composite_type_field (t, "u32", | |
685 | init_vector_type (bt->builtin_int32, 4)); | |
686 | append_composite_type_field (t, "u16", | |
687 | init_vector_type (bt->builtin_int16, 8)); | |
688 | append_composite_type_field (t, "u8", | |
689 | init_vector_type (bt->builtin_int8, 16)); | |
690 | ||
2062087b | 691 | t->set_is_vector (true); |
d0e39ea2 | 692 | t->set_name ("builtin_type_vec128i"); |
9d24df82 HAQ |
693 | |
694 | return t; | |
695 | } | |
696 | ||
697 | /* Return the GDB type object for the "standard" data type | |
698 | of data in register N. */ | |
699 | ||
700 | static struct type * | |
701 | csky_register_type (struct gdbarch *gdbarch, int reg_nr) | |
702 | { | |
e710dfe0 JL |
703 | int num_regs = gdbarch_num_regs (gdbarch); |
704 | csky_gdbarch_tdep *tdep | |
705 | = gdbarch_tdep<csky_gdbarch_tdep> (gdbarch); | |
706 | ||
707 | if (tdep->fv_pseudo_registers_count) | |
708 | { | |
709 | if ((reg_nr >= num_regs) | |
710 | && (reg_nr < (num_regs + tdep->fv_pseudo_registers_count))) | |
711 | return builtin_type (gdbarch)->builtin_int32; | |
712 | } | |
713 | ||
84f9fbe9 JL |
714 | /* Vector register has 128 bits, and only in ck810. Just return |
715 | csky_vector_type(), not check tdesc_has_registers(), is in case | |
716 | of some GDB stub does not describe type for Vector resgisters | |
717 | in the target-description-xml. */ | |
718 | if ((reg_nr >= CSKY_VR0_REGNUM) && (reg_nr <= CSKY_VR0_REGNUM + 15)) | |
719 | return csky_vector_type (gdbarch); | |
720 | ||
afd53c3c JL |
721 | /* If type has been described in tdesc-xml, use it. */ |
722 | if (tdesc_has_registers (gdbarch_target_desc (gdbarch))) | |
723 | { | |
724 | struct type *tdesc_t = tdesc_register_type (gdbarch, reg_nr); | |
725 | if (tdesc_t) | |
726 | return tdesc_t; | |
727 | } | |
728 | ||
9d24df82 HAQ |
729 | /* PC, EPC, FPC is a text pointer. */ |
730 | if ((reg_nr == CSKY_PC_REGNUM) || (reg_nr == CSKY_EPC_REGNUM) | |
731 | || (reg_nr == CSKY_FPC_REGNUM)) | |
732 | return builtin_type (gdbarch)->builtin_func_ptr; | |
733 | ||
734 | /* VBR is a data pointer. */ | |
735 | if (reg_nr == CSKY_VBR_REGNUM) | |
736 | return builtin_type (gdbarch)->builtin_data_ptr; | |
737 | ||
738 | /* Float register has 64 bits, and only in ck810. */ | |
739 | if ((reg_nr >=CSKY_FR0_REGNUM) && (reg_nr <= CSKY_FR0_REGNUM + 15)) | |
740 | return arch_float_type (gdbarch, 64, "builtin_type_csky_ext", | |
741 | floatformats_ieee_double); | |
742 | ||
9d24df82 HAQ |
743 | /* Profiling general register has 48 bits, we use 64bit. */ |
744 | if ((reg_nr >= CSKY_PROFGR_REGNUM) && (reg_nr <= CSKY_PROFGR_REGNUM + 44)) | |
745 | return builtin_type (gdbarch)->builtin_uint64; | |
746 | ||
747 | if (reg_nr == CSKY_SP_REGNUM) | |
748 | return builtin_type (gdbarch)->builtin_data_ptr; | |
749 | ||
750 | /* Others are 32 bits. */ | |
751 | return builtin_type (gdbarch)->builtin_int32; | |
752 | } | |
753 | ||
754 | /* Data structure to marshall items in a dummy stack frame when | |
755 | calling a function in the inferior. */ | |
756 | ||
0fecb1a7 | 757 | struct csky_stack_item |
9d24df82 | 758 | { |
0fecb1a7 | 759 | csky_stack_item (int len_, const gdb_byte *data_) |
9d24df82 HAQ |
760 | : len (len_), data (data_) |
761 | {} | |
762 | ||
763 | int len; | |
764 | const gdb_byte *data; | |
765 | }; | |
766 | ||
767 | /* Implement the push_dummy_call gdbarch method. */ | |
768 | ||
769 | static CORE_ADDR | |
770 | csky_push_dummy_call (struct gdbarch *gdbarch, struct value *function, | |
771 | struct regcache *regcache, CORE_ADDR bp_addr, | |
772 | int nargs, struct value **args, CORE_ADDR sp, | |
cf84fa6b AH |
773 | function_call_return_method return_method, |
774 | CORE_ADDR struct_addr) | |
9d24df82 HAQ |
775 | { |
776 | int argnum; | |
777 | int argreg = CSKY_ABI_A0_REGNUM; | |
778 | int last_arg_regnum = CSKY_ABI_LAST_ARG_REGNUM; | |
9d24df82 | 779 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
0fecb1a7 | 780 | std::vector<csky_stack_item> stack_items; |
9d24df82 HAQ |
781 | |
782 | /* Set the return address. For CSKY, the return breakpoint is | |
783 | always at BP_ADDR. */ | |
784 | regcache_cooked_write_unsigned (regcache, CSKY_LR_REGNUM, bp_addr); | |
785 | ||
786 | /* The struct_return pointer occupies the first parameter | |
787 | passing register. */ | |
cf84fa6b | 788 | if (return_method == return_method_struct) |
9d24df82 HAQ |
789 | { |
790 | if (csky_debug) | |
791 | { | |
6cb06a8c TT |
792 | gdb_printf (gdb_stdlog, |
793 | "csky: struct return in %s = %s\n", | |
794 | gdbarch_register_name (gdbarch, argreg), | |
795 | paddress (gdbarch, struct_addr)); | |
9d24df82 HAQ |
796 | } |
797 | regcache_cooked_write_unsigned (regcache, argreg, struct_addr); | |
798 | argreg++; | |
799 | } | |
800 | ||
801 | /* Put parameters into argument registers in REGCACHE. | |
802 | In ABI argument registers are r0 through r3. */ | |
803 | for (argnum = 0; argnum < nargs; argnum++) | |
804 | { | |
805 | int len; | |
806 | struct type *arg_type; | |
807 | const gdb_byte *val; | |
808 | ||
809 | arg_type = check_typedef (value_type (args[argnum])); | |
df86565b | 810 | len = arg_type->length (); |
50888e42 | 811 | val = value_contents (args[argnum]).data (); |
9d24df82 HAQ |
812 | |
813 | /* Copy the argument to argument registers or the dummy stack. | |
814 | Large arguments are split between registers and stack. | |
815 | ||
816 | If len < 4, there is no need to worry about endianness since | |
817 | the arguments will always be stored in the low address. */ | |
818 | if (len < 4) | |
819 | { | |
820 | CORE_ADDR regval | |
821 | = extract_unsigned_integer (val, len, byte_order); | |
822 | regcache_cooked_write_unsigned (regcache, argreg, regval); | |
823 | argreg++; | |
824 | } | |
825 | else | |
826 | { | |
827 | while (len > 0) | |
828 | { | |
829 | int partial_len = len < 4 ? len : 4; | |
830 | if (argreg <= last_arg_regnum) | |
831 | { | |
832 | /* The argument is passed in an argument register. */ | |
833 | CORE_ADDR regval | |
834 | = extract_unsigned_integer (val, partial_len, | |
835 | byte_order); | |
836 | if (byte_order == BFD_ENDIAN_BIG) | |
837 | regval <<= (4 - partial_len) * 8; | |
838 | ||
839 | /* Put regval into register in REGCACHE. */ | |
840 | regcache_cooked_write_unsigned (regcache, argreg, | |
841 | regval); | |
842 | argreg++; | |
843 | } | |
844 | else | |
845 | { | |
846 | /* The argument should be pushed onto the dummy stack. */ | |
847 | stack_items.emplace_back (4, val); | |
9d24df82 HAQ |
848 | } |
849 | len -= partial_len; | |
850 | val += partial_len; | |
851 | } | |
852 | } | |
853 | } | |
854 | ||
855 | /* Transfer the dummy stack frame to the target. */ | |
0fecb1a7 | 856 | std::vector<csky_stack_item>::reverse_iterator iter; |
9d24df82 HAQ |
857 | for (iter = stack_items.rbegin (); iter != stack_items.rend (); ++iter) |
858 | { | |
859 | sp -= iter->len; | |
860 | write_memory (sp, iter->data, iter->len); | |
861 | } | |
862 | ||
863 | /* Finally, update the SP register. */ | |
864 | regcache_cooked_write_unsigned (regcache, CSKY_SP_REGNUM, sp); | |
865 | return sp; | |
866 | } | |
867 | ||
868 | /* Implement the return_value gdbarch method. */ | |
869 | ||
870 | static enum return_value_convention | |
871 | csky_return_value (struct gdbarch *gdbarch, struct value *function, | |
872 | struct type *valtype, struct regcache *regcache, | |
873 | gdb_byte *readbuf, const gdb_byte *writebuf) | |
874 | { | |
875 | CORE_ADDR regval; | |
876 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
df86565b | 877 | int len = valtype->length (); |
9d24df82 HAQ |
878 | unsigned int ret_regnum = CSKY_RET_REGNUM; |
879 | ||
880 | /* Csky abi specifies that return values larger than 8 bytes | |
881 | are put on the stack. */ | |
882 | if (len > 8) | |
883 | return RETURN_VALUE_STRUCT_CONVENTION; | |
884 | else | |
885 | { | |
886 | if (readbuf != NULL) | |
887 | { | |
888 | ULONGEST tmp; | |
889 | /* By using store_unsigned_integer we avoid having to do | |
890 | anything special for small big-endian values. */ | |
891 | regcache->cooked_read (ret_regnum, &tmp); | |
892 | store_unsigned_integer (readbuf, (len > 4 ? 4 : len), | |
893 | byte_order, tmp); | |
894 | if (len > 4) | |
895 | { | |
896 | regcache->cooked_read (ret_regnum + 1, &tmp); | |
897 | store_unsigned_integer (readbuf + 4, 4, byte_order, tmp); | |
898 | } | |
899 | } | |
900 | if (writebuf != NULL) | |
901 | { | |
902 | regval = extract_unsigned_integer (writebuf, len > 4 ? 4 : len, | |
903 | byte_order); | |
904 | regcache_cooked_write_unsigned (regcache, ret_regnum, regval); | |
905 | if (len > 4) | |
906 | { | |
907 | regval = extract_unsigned_integer ((gdb_byte *) writebuf + 4, | |
908 | 4, byte_order); | |
909 | regcache_cooked_write_unsigned (regcache, ret_regnum + 1, | |
910 | regval); | |
911 | } | |
912 | ||
913 | } | |
914 | return RETURN_VALUE_REGISTER_CONVENTION; | |
915 | } | |
916 | } | |
917 | ||
918 | /* Implement the frame_align gdbarch method. | |
919 | ||
920 | Adjust the address downward (direction of stack growth) so that it | |
921 | is correctly aligned for a new stack frame. */ | |
922 | ||
923 | static CORE_ADDR | |
924 | csky_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr) | |
925 | { | |
926 | return align_down (addr, 4); | |
927 | } | |
928 | ||
929 | /* Unwind cache used for gdbarch fallback unwinder. */ | |
930 | ||
931 | struct csky_unwind_cache | |
932 | { | |
933 | /* The stack pointer at the time this frame was created; i.e. the | |
934 | caller's stack pointer when this function was called. It is used | |
935 | to identify this frame. */ | |
936 | CORE_ADDR prev_sp; | |
937 | ||
938 | /* The frame base for this frame is just prev_sp - frame size. | |
939 | FRAMESIZE is the distance from the frame pointer to the | |
940 | initial stack pointer. */ | |
941 | int framesize; | |
942 | ||
943 | /* The register used to hold the frame pointer for this frame. */ | |
944 | int framereg; | |
945 | ||
946 | /* Saved register offsets. */ | |
098caef4 | 947 | trad_frame_saved_reg *saved_regs; |
9d24df82 HAQ |
948 | }; |
949 | ||
950 | /* Do prologue analysis, returning the PC of the first instruction | |
951 | after the function prologue. */ | |
952 | ||
953 | static CORE_ADDR | |
954 | csky_analyze_prologue (struct gdbarch *gdbarch, | |
955 | CORE_ADDR start_pc, | |
956 | CORE_ADDR limit_pc, | |
957 | CORE_ADDR end_pc, | |
bd2b40ac | 958 | frame_info_ptr this_frame, |
9d24df82 HAQ |
959 | struct csky_unwind_cache *this_cache, |
960 | lr_type_t lr_type) | |
961 | { | |
962 | CORE_ADDR addr; | |
963 | unsigned int insn, rn; | |
964 | int framesize = 0; | |
965 | int stacksize = 0; | |
966 | int register_offsets[CSKY_NUM_GREGS_SAVED_GREGS]; | |
967 | int insn_len; | |
968 | /* For adjusting fp. */ | |
969 | int is_fp_saved = 0; | |
970 | int adjust_fp = 0; | |
971 | ||
972 | /* REGISTER_OFFSETS will contain offsets from the top of the frame | |
973 | (NOT the frame pointer) for the various saved registers, or -1 | |
974 | if the register is not saved. */ | |
975 | for (rn = 0; rn < CSKY_NUM_GREGS_SAVED_GREGS; rn++) | |
976 | register_offsets[rn] = -1; | |
977 | ||
978 | /* Analyze the prologue. Things we determine from analyzing the | |
979 | prologue include the size of the frame and which registers are | |
980 | saved (and where). */ | |
981 | if (csky_debug) | |
982 | { | |
6cb06a8c TT |
983 | gdb_printf (gdb_stdlog, |
984 | "csky: Scanning prologue: start_pc = 0x%x," | |
985 | "limit_pc = 0x%x\n", (unsigned int) start_pc, | |
986 | (unsigned int) limit_pc); | |
9d24df82 HAQ |
987 | } |
988 | ||
989 | /* Default to 16 bit instruction. */ | |
990 | insn_len = 2; | |
991 | stacksize = 0; | |
992 | for (addr = start_pc; addr < limit_pc; addr += insn_len) | |
993 | { | |
994 | /* Get next insn. */ | |
995 | insn_len = csky_get_insn (gdbarch, addr, &insn); | |
996 | ||
997 | /* Check if 32 bit. */ | |
998 | if (insn_len == 4) | |
999 | { | |
1000 | /* subi32 sp,sp oimm12. */ | |
1001 | if (CSKY_32_IS_SUBI0 (insn)) | |
1002 | { | |
1003 | /* Got oimm12. */ | |
1004 | int offset = CSKY_32_SUBI_IMM (insn); | |
1005 | if (csky_debug) | |
1006 | { | |
6cb06a8c TT |
1007 | gdb_printf (gdb_stdlog, |
1008 | "csky: got subi sp,%d; continuing\n", | |
1009 | offset); | |
9d24df82 HAQ |
1010 | } |
1011 | stacksize += offset; | |
1012 | continue; | |
1013 | } | |
1014 | /* stm32 ry-rz,(sp). */ | |
1015 | else if (CSKY_32_IS_STMx0 (insn)) | |
1016 | { | |
1017 | /* Spill register(s). */ | |
1018 | int start_register; | |
1019 | int reg_count; | |
1020 | int offset; | |
1021 | ||
1022 | /* BIG WARNING! The CKCore ABI does not restrict functions | |
1023 | to taking only one stack allocation. Therefore, when | |
1024 | we save a register, we record the offset of where it was | |
1025 | saved relative to the current stacksize. This will | |
1026 | then give an offset from the SP upon entry to our | |
1027 | function. Remember, stacksize is NOT constant until | |
1028 | we're done scanning the prologue. */ | |
1029 | start_register = CSKY_32_STM_VAL_REGNUM (insn); | |
1030 | reg_count = CSKY_32_STM_SIZE (insn); | |
1031 | if (csky_debug) | |
1032 | { | |
6cb06a8c TT |
1033 | gdb_printf (gdb_stdlog, |
1034 | "csky: got stm r%d-r%d,(sp)\n", | |
1035 | start_register, | |
1036 | start_register + reg_count); | |
9d24df82 HAQ |
1037 | } |
1038 | ||
1039 | for (rn = start_register, offset = 0; | |
1040 | rn <= start_register + reg_count; | |
1041 | rn++, offset += 4) | |
1042 | { | |
1043 | register_offsets[rn] = stacksize - offset; | |
1044 | if (csky_debug) | |
1045 | { | |
6cb06a8c TT |
1046 | gdb_printf (gdb_stdlog, |
1047 | "csky: r%d saved at 0x%x" | |
1048 | " (offset %d)\n", | |
1049 | rn, register_offsets[rn], | |
1050 | offset); | |
9d24df82 HAQ |
1051 | } |
1052 | } | |
1053 | if (csky_debug) | |
6cb06a8c | 1054 | gdb_printf (gdb_stdlog, "csky: continuing\n"); |
9d24df82 HAQ |
1055 | continue; |
1056 | } | |
1057 | /* stw ry,(sp,disp). */ | |
1058 | else if (CSKY_32_IS_STWx0 (insn)) | |
1059 | { | |
1060 | /* Spill register: see note for IS_STM above. */ | |
1061 | int disp; | |
1062 | ||
1063 | rn = CSKY_32_ST_VAL_REGNUM (insn); | |
1064 | disp = CSKY_32_ST_OFFSET (insn); | |
1065 | register_offsets[rn] = stacksize - disp; | |
1066 | if (csky_debug) | |
1067 | print_savedreg_msg (rn, register_offsets, true); | |
1068 | continue; | |
1069 | } | |
1070 | else if (CSKY_32_IS_MOV_FP_SP (insn)) | |
1071 | { | |
1072 | /* SP is saved to FP reg, means code afer prologue may | |
1073 | modify SP. */ | |
1074 | is_fp_saved = 1; | |
1075 | adjust_fp = stacksize; | |
1076 | continue; | |
1077 | } | |
1078 | else if (CSKY_32_IS_MFCR_EPSR (insn)) | |
1079 | { | |
1080 | unsigned int insn2; | |
1081 | addr += 4; | |
1082 | int mfcr_regnum = insn & 0x1f; | |
1083 | insn_len = csky_get_insn (gdbarch, addr, &insn2); | |
1084 | if (insn_len == 2) | |
1085 | { | |
1086 | int stw_regnum = (insn2 >> 5) & 0x7; | |
1087 | if (CSKY_16_IS_STWx0 (insn2) && (mfcr_regnum == stw_regnum)) | |
1088 | { | |
1089 | int offset; | |
1090 | ||
1091 | /* CSKY_EPSR_REGNUM. */ | |
1092 | rn = CSKY_NUM_GREGS; | |
1093 | offset = CSKY_16_STWx0_OFFSET (insn2); | |
1094 | register_offsets[rn] = stacksize - offset; | |
1095 | if (csky_debug) | |
1096 | print_savedreg_msg (rn, register_offsets, true); | |
1097 | continue; | |
1098 | } | |
1099 | break; | |
1100 | } | |
1101 | else | |
1102 | { | |
1103 | /* INSN_LEN == 4. */ | |
1104 | int stw_regnum = (insn2 >> 21) & 0x1f; | |
1105 | if (CSKY_32_IS_STWx0 (insn2) && (mfcr_regnum == stw_regnum)) | |
1106 | { | |
1107 | int offset; | |
1108 | ||
1109 | /* CSKY_EPSR_REGNUM. */ | |
1110 | rn = CSKY_NUM_GREGS; | |
1111 | offset = CSKY_32_ST_OFFSET (insn2); | |
1112 | register_offsets[rn] = framesize - offset; | |
1113 | if (csky_debug) | |
1114 | print_savedreg_msg (rn, register_offsets, true); | |
1115 | continue; | |
1116 | } | |
1117 | break; | |
1118 | } | |
1119 | } | |
1120 | else if (CSKY_32_IS_MFCR_FPSR (insn)) | |
1121 | { | |
1122 | unsigned int insn2; | |
1123 | addr += 4; | |
1124 | int mfcr_regnum = insn & 0x1f; | |
1125 | insn_len = csky_get_insn (gdbarch, addr, &insn2); | |
1126 | if (insn_len == 2) | |
1127 | { | |
1128 | int stw_regnum = (insn2 >> 5) & 0x7; | |
1129 | if (CSKY_16_IS_STWx0 (insn2) && (mfcr_regnum | |
1130 | == stw_regnum)) | |
1131 | { | |
1132 | int offset; | |
1133 | ||
1134 | /* CSKY_FPSR_REGNUM. */ | |
1135 | rn = CSKY_NUM_GREGS + 1; | |
1136 | offset = CSKY_16_STWx0_OFFSET (insn2); | |
1137 | register_offsets[rn] = stacksize - offset; | |
1138 | if (csky_debug) | |
1139 | print_savedreg_msg (rn, register_offsets, true); | |
1140 | continue; | |
1141 | } | |
1142 | break; | |
1143 | } | |
1144 | else | |
1145 | { | |
1146 | /* INSN_LEN == 4. */ | |
1147 | int stw_regnum = (insn2 >> 21) & 0x1f; | |
1148 | if (CSKY_32_IS_STWx0 (insn2) && (mfcr_regnum == stw_regnum)) | |
1149 | { | |
1150 | int offset; | |
1151 | ||
1152 | /* CSKY_FPSR_REGNUM. */ | |
1153 | rn = CSKY_NUM_GREGS + 1; | |
1154 | offset = CSKY_32_ST_OFFSET (insn2); | |
1155 | register_offsets[rn] = framesize - offset; | |
1156 | if (csky_debug) | |
1157 | print_savedreg_msg (rn, register_offsets, true); | |
1158 | continue; | |
1159 | } | |
1160 | break; | |
1161 | } | |
1162 | } | |
1163 | else if (CSKY_32_IS_MFCR_EPC (insn)) | |
1164 | { | |
1165 | unsigned int insn2; | |
1166 | addr += 4; | |
1167 | int mfcr_regnum = insn & 0x1f; | |
1168 | insn_len = csky_get_insn (gdbarch, addr, &insn2); | |
1169 | if (insn_len == 2) | |
1170 | { | |
1171 | int stw_regnum = (insn2 >> 5) & 0x7; | |
1172 | if (CSKY_16_IS_STWx0 (insn2) && (mfcr_regnum == stw_regnum)) | |
1173 | { | |
1174 | int offset; | |
1175 | ||
1176 | /* CSKY_EPC_REGNUM. */ | |
1177 | rn = CSKY_NUM_GREGS + 2; | |
1178 | offset = CSKY_16_STWx0_OFFSET (insn2); | |
1179 | register_offsets[rn] = stacksize - offset; | |
1180 | if (csky_debug) | |
1181 | print_savedreg_msg (rn, register_offsets, true); | |
1182 | continue; | |
1183 | } | |
1184 | break; | |
1185 | } | |
1186 | else | |
1187 | { | |
1188 | /* INSN_LEN == 4. */ | |
1189 | int stw_regnum = (insn2 >> 21) & 0x1f; | |
1190 | if (CSKY_32_IS_STWx0 (insn2) && (mfcr_regnum == stw_regnum)) | |
1191 | { | |
1192 | int offset; | |
1193 | ||
1194 | /* CSKY_EPC_REGNUM. */ | |
1195 | rn = CSKY_NUM_GREGS + 2; | |
1196 | offset = CSKY_32_ST_OFFSET (insn2); | |
1197 | register_offsets[rn] = framesize - offset; | |
1198 | if (csky_debug) | |
1199 | print_savedreg_msg (rn, register_offsets, true); | |
1200 | continue; | |
1201 | } | |
1202 | break; | |
1203 | } | |
1204 | } | |
1205 | else if (CSKY_32_IS_MFCR_FPC (insn)) | |
1206 | { | |
1207 | unsigned int insn2; | |
1208 | addr += 4; | |
1209 | int mfcr_regnum = insn & 0x1f; | |
1210 | insn_len = csky_get_insn (gdbarch, addr, &insn2); | |
1211 | if (insn_len == 2) | |
1212 | { | |
1213 | int stw_regnum = (insn2 >> 5) & 0x7; | |
1214 | if (CSKY_16_IS_STWx0 (insn2) && (mfcr_regnum == stw_regnum)) | |
1215 | { | |
1216 | int offset; | |
1217 | ||
1218 | /* CSKY_FPC_REGNUM. */ | |
1219 | rn = CSKY_NUM_GREGS + 3; | |
1220 | offset = CSKY_16_STWx0_OFFSET (insn2); | |
1221 | register_offsets[rn] = stacksize - offset; | |
1222 | if (csky_debug) | |
1223 | print_savedreg_msg (rn, register_offsets, true); | |
1224 | continue; | |
1225 | } | |
1226 | break; | |
1227 | } | |
1228 | else | |
1229 | { | |
1230 | /* INSN_LEN == 4. */ | |
1231 | int stw_regnum = (insn2 >> 21) & 0x1f; | |
1232 | if (CSKY_32_IS_STWx0 (insn2) && (mfcr_regnum == stw_regnum)) | |
1233 | { | |
1234 | int offset; | |
1235 | ||
1236 | /* CSKY_FPC_REGNUM. */ | |
1237 | rn = CSKY_NUM_GREGS + 3; | |
1238 | offset = CSKY_32_ST_OFFSET (insn2); | |
1239 | register_offsets[rn] = framesize - offset; | |
1240 | if (csky_debug) | |
1241 | print_savedreg_msg (rn, register_offsets, true); | |
1242 | continue; | |
1243 | } | |
1244 | break; | |
1245 | } | |
1246 | } | |
1247 | else if (CSKY_32_IS_PUSH (insn)) | |
1248 | { | |
1249 | /* Push for 32_bit. */ | |
9d24df82 HAQ |
1250 | if (CSKY_32_IS_PUSH_R29 (insn)) |
1251 | { | |
1252 | stacksize += 4; | |
1253 | register_offsets[29] = stacksize; | |
1254 | if (csky_debug) | |
1255 | print_savedreg_msg (29, register_offsets, false); | |
9d24df82 HAQ |
1256 | } |
1257 | if (CSKY_32_PUSH_LIST2 (insn)) | |
1258 | { | |
1259 | int num = CSKY_32_PUSH_LIST2 (insn); | |
1260 | int tmp = 0; | |
1261 | stacksize += num * 4; | |
9d24df82 HAQ |
1262 | if (csky_debug) |
1263 | { | |
6cb06a8c TT |
1264 | gdb_printf (gdb_stdlog, |
1265 | "csky: push regs_array: r16-r%d\n", | |
1266 | 16 + num - 1); | |
9d24df82 HAQ |
1267 | } |
1268 | for (rn = 16; rn <= 16 + num - 1; rn++) | |
1269 | { | |
1270 | register_offsets[rn] = stacksize - tmp; | |
1271 | if (csky_debug) | |
1272 | { | |
6cb06a8c TT |
1273 | gdb_printf (gdb_stdlog, |
1274 | "csky: r%d saved at 0x%x" | |
1275 | " (offset %d)\n", rn, | |
1276 | register_offsets[rn], tmp); | |
9d24df82 HAQ |
1277 | } |
1278 | tmp += 4; | |
1279 | } | |
1280 | } | |
1281 | if (CSKY_32_IS_PUSH_R15 (insn)) | |
1282 | { | |
1283 | stacksize += 4; | |
1284 | register_offsets[15] = stacksize; | |
1285 | if (csky_debug) | |
1286 | print_savedreg_msg (15, register_offsets, false); | |
9d24df82 HAQ |
1287 | } |
1288 | if (CSKY_32_PUSH_LIST1 (insn)) | |
1289 | { | |
1290 | int num = CSKY_32_PUSH_LIST1 (insn); | |
1291 | int tmp = 0; | |
1292 | stacksize += num * 4; | |
9d24df82 HAQ |
1293 | if (csky_debug) |
1294 | { | |
6cb06a8c TT |
1295 | gdb_printf (gdb_stdlog, |
1296 | "csky: push regs_array: r4-r%d\n", | |
1297 | 4 + num - 1); | |
9d24df82 HAQ |
1298 | } |
1299 | for (rn = 4; rn <= 4 + num - 1; rn++) | |
1300 | { | |
1301 | register_offsets[rn] = stacksize - tmp; | |
1302 | if (csky_debug) | |
1303 | { | |
6cb06a8c TT |
1304 | gdb_printf (gdb_stdlog, |
1305 | "csky: r%d saved at 0x%x" | |
1306 | " (offset %d)\n", rn, | |
1307 | register_offsets[rn], tmp); | |
9d24df82 HAQ |
1308 | } |
1309 | tmp += 4; | |
1310 | } | |
1311 | } | |
1312 | ||
1313 | framesize = stacksize; | |
1314 | if (csky_debug) | |
6cb06a8c | 1315 | gdb_printf (gdb_stdlog, "csky: continuing\n"); |
9d24df82 HAQ |
1316 | continue; |
1317 | } | |
1318 | else if (CSKY_32_IS_LRW4 (insn) || CSKY_32_IS_MOVI4 (insn) | |
1319 | || CSKY_32_IS_MOVIH4 (insn) || CSKY_32_IS_BMASKI4 (insn)) | |
1320 | { | |
1321 | int adjust = 0; | |
1322 | int offset = 0; | |
1323 | unsigned int insn2; | |
1324 | ||
1325 | if (csky_debug) | |
1326 | { | |
6cb06a8c TT |
1327 | gdb_printf (gdb_stdlog, |
1328 | "csky: looking at large frame\n"); | |
9d24df82 HAQ |
1329 | } |
1330 | if (CSKY_32_IS_LRW4 (insn)) | |
1331 | { | |
1332 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
1333 | int literal_addr = (addr + ((insn & 0xffff) << 2)) | |
1334 | & 0xfffffffc; | |
1335 | adjust = read_memory_unsigned_integer (literal_addr, 4, | |
1336 | byte_order); | |
1337 | } | |
1338 | else if (CSKY_32_IS_MOVI4 (insn)) | |
1339 | adjust = (insn & 0xffff); | |
1340 | else if (CSKY_32_IS_MOVIH4 (insn)) | |
1341 | adjust = (insn & 0xffff) << 16; | |
1342 | else | |
1343 | { | |
1344 | /* CSKY_32_IS_BMASKI4 (insn). */ | |
1345 | adjust = (1 << (((insn & 0x3e00000) >> 21) + 1)) - 1; | |
1346 | } | |
1347 | ||
1348 | if (csky_debug) | |
1349 | { | |
6cb06a8c TT |
1350 | gdb_printf (gdb_stdlog, |
1351 | "csky: base stacksize=0x%x\n", adjust); | |
9d24df82 HAQ |
1352 | |
1353 | /* May have zero or more insns which modify r4. */ | |
6cb06a8c TT |
1354 | gdb_printf (gdb_stdlog, |
1355 | "csky: looking for r4 adjusters...\n"); | |
9d24df82 HAQ |
1356 | } |
1357 | ||
1358 | offset = 4; | |
1359 | insn_len = csky_get_insn (gdbarch, addr + offset, &insn2); | |
1360 | while (CSKY_IS_R4_ADJUSTER (insn2)) | |
1361 | { | |
1362 | if (CSKY_32_IS_ADDI4 (insn2)) | |
1363 | { | |
1364 | int imm = (insn2 & 0xfff) + 1; | |
1365 | adjust += imm; | |
1366 | if (csky_debug) | |
1367 | { | |
6cb06a8c TT |
1368 | gdb_printf (gdb_stdlog, |
1369 | "csky: addi r4,%d\n", imm); | |
9d24df82 HAQ |
1370 | } |
1371 | } | |
1372 | else if (CSKY_32_IS_SUBI4 (insn2)) | |
1373 | { | |
1374 | int imm = (insn2 & 0xfff) + 1; | |
1375 | adjust -= imm; | |
1376 | if (csky_debug) | |
1377 | { | |
6cb06a8c TT |
1378 | gdb_printf (gdb_stdlog, |
1379 | "csky: subi r4,%d\n", imm); | |
9d24df82 HAQ |
1380 | } |
1381 | } | |
1382 | else if (CSKY_32_IS_NOR4 (insn2)) | |
1383 | { | |
1384 | adjust = ~adjust; | |
1385 | if (csky_debug) | |
1386 | { | |
6cb06a8c TT |
1387 | gdb_printf (gdb_stdlog, |
1388 | "csky: nor r4,r4,r4\n"); | |
9d24df82 HAQ |
1389 | } |
1390 | } | |
1391 | else if (CSKY_32_IS_ROTLI4 (insn2)) | |
1392 | { | |
1393 | int imm = ((insn2 >> 21) & 0x1f); | |
1394 | int temp = adjust >> (32 - imm); | |
1395 | adjust <<= imm; | |
1396 | adjust |= temp; | |
1397 | if (csky_debug) | |
1398 | { | |
6cb06a8c TT |
1399 | gdb_printf (gdb_stdlog, |
1400 | "csky: rotli r4,r4,%d\n", imm); | |
9d24df82 HAQ |
1401 | } |
1402 | } | |
1403 | else if (CSKY_32_IS_LISI4 (insn2)) | |
1404 | { | |
1405 | int imm = ((insn2 >> 21) & 0x1f); | |
1406 | adjust <<= imm; | |
1407 | if (csky_debug) | |
1408 | { | |
6cb06a8c TT |
1409 | gdb_printf (gdb_stdlog, |
1410 | "csky: lsli r4,r4,%d\n", imm); | |
9d24df82 HAQ |
1411 | } |
1412 | } | |
1413 | else if (CSKY_32_IS_BSETI4 (insn2)) | |
1414 | { | |
1415 | int imm = ((insn2 >> 21) & 0x1f); | |
1416 | adjust |= (1 << imm); | |
1417 | if (csky_debug) | |
1418 | { | |
6cb06a8c TT |
1419 | gdb_printf (gdb_stdlog, |
1420 | "csky: bseti r4,r4 %d\n", imm); | |
9d24df82 HAQ |
1421 | } |
1422 | } | |
1423 | else if (CSKY_32_IS_BCLRI4 (insn2)) | |
1424 | { | |
1425 | int imm = ((insn2 >> 21) & 0x1f); | |
1426 | adjust &= ~(1 << imm); | |
1427 | if (csky_debug) | |
1428 | { | |
6cb06a8c TT |
1429 | gdb_printf (gdb_stdlog, |
1430 | "csky: bclri r4,r4 %d\n", imm); | |
9d24df82 HAQ |
1431 | } |
1432 | } | |
1433 | else if (CSKY_32_IS_IXH4 (insn2)) | |
1434 | { | |
1435 | adjust *= 3; | |
1436 | if (csky_debug) | |
1437 | { | |
6cb06a8c TT |
1438 | gdb_printf (gdb_stdlog, |
1439 | "csky: ixh r4,r4,r4\n"); | |
9d24df82 HAQ |
1440 | } |
1441 | } | |
1442 | else if (CSKY_32_IS_IXW4 (insn2)) | |
1443 | { | |
1444 | adjust *= 5; | |
1445 | if (csky_debug) | |
1446 | { | |
6cb06a8c TT |
1447 | gdb_printf (gdb_stdlog, |
1448 | "csky: ixw r4,r4,r4\n"); | |
9d24df82 HAQ |
1449 | } |
1450 | } | |
1451 | else if (CSKY_16_IS_ADDI4 (insn2)) | |
1452 | { | |
1453 | int imm = (insn2 & 0xff) + 1; | |
1454 | adjust += imm; | |
1455 | if (csky_debug) | |
1456 | { | |
6cb06a8c TT |
1457 | gdb_printf (gdb_stdlog, |
1458 | "csky: addi r4,%d\n", imm); | |
9d24df82 HAQ |
1459 | } |
1460 | } | |
1461 | else if (CSKY_16_IS_SUBI4 (insn2)) | |
1462 | { | |
1463 | int imm = (insn2 & 0xff) + 1; | |
1464 | adjust -= imm; | |
1465 | if (csky_debug) | |
1466 | { | |
6cb06a8c TT |
1467 | gdb_printf (gdb_stdlog, |
1468 | "csky: subi r4,%d\n", imm); | |
9d24df82 HAQ |
1469 | } |
1470 | } | |
1471 | else if (CSKY_16_IS_NOR4 (insn2)) | |
1472 | { | |
1473 | adjust = ~adjust; | |
1474 | if (csky_debug) | |
1475 | { | |
6cb06a8c TT |
1476 | gdb_printf (gdb_stdlog, |
1477 | "csky: nor r4,r4\n"); | |
9d24df82 HAQ |
1478 | } |
1479 | } | |
1480 | else if (CSKY_16_IS_BSETI4 (insn2)) | |
1481 | { | |
1482 | int imm = (insn2 & 0x1f); | |
1483 | adjust |= (1 << imm); | |
1484 | if (csky_debug) | |
1485 | { | |
6cb06a8c TT |
1486 | gdb_printf (gdb_stdlog, |
1487 | "csky: bseti r4, %d\n", imm); | |
9d24df82 HAQ |
1488 | } |
1489 | } | |
1490 | else if (CSKY_16_IS_BCLRI4 (insn2)) | |
1491 | { | |
1492 | int imm = (insn2 & 0x1f); | |
1493 | adjust &= ~(1 << imm); | |
1494 | if (csky_debug) | |
1495 | { | |
6cb06a8c TT |
1496 | gdb_printf (gdb_stdlog, |
1497 | "csky: bclri r4, %d\n", imm); | |
9d24df82 HAQ |
1498 | } |
1499 | } | |
1500 | else if (CSKY_16_IS_LSLI4 (insn2)) | |
1501 | { | |
1502 | int imm = (insn2 & 0x1f); | |
1503 | adjust <<= imm; | |
1504 | if (csky_debug) | |
1505 | { | |
6cb06a8c TT |
1506 | gdb_printf (gdb_stdlog, |
1507 | "csky: lsli r4,r4, %d\n", imm); | |
9d24df82 HAQ |
1508 | } |
1509 | } | |
1510 | ||
1511 | offset += insn_len; | |
1512 | insn_len = csky_get_insn (gdbarch, addr + offset, &insn2); | |
1513 | }; | |
1514 | ||
1515 | if (csky_debug) | |
1516 | { | |
6cb06a8c TT |
1517 | gdb_printf (gdb_stdlog, "csky: done looking for" |
1518 | " r4 adjusters\n"); | |
9d24df82 HAQ |
1519 | } |
1520 | ||
1521 | /* If the next insn adjusts the stack pointer, we keep | |
1522 | everything; if not, we scrap it and we've found the | |
1523 | end of the prologue. */ | |
1524 | if (CSKY_IS_SUBU4 (insn2)) | |
1525 | { | |
1526 | addr += offset; | |
1527 | stacksize += adjust; | |
1528 | if (csky_debug) | |
1529 | { | |
6cb06a8c TT |
1530 | gdb_printf (gdb_stdlog, |
1531 | "csky: found stack adjustment of" | |
1532 | " 0x%x bytes.\n", adjust); | |
1533 | gdb_printf (gdb_stdlog, | |
1534 | "csky: skipping to new address %s\n", | |
1535 | core_addr_to_string_nz (addr)); | |
1536 | gdb_printf (gdb_stdlog, | |
1537 | "csky: continuing\n"); | |
9d24df82 HAQ |
1538 | } |
1539 | continue; | |
1540 | } | |
1541 | ||
1542 | /* None of these instructions are prologue, so don't touch | |
1543 | anything. */ | |
1544 | if (csky_debug) | |
1545 | { | |
6cb06a8c TT |
1546 | gdb_printf (gdb_stdlog, |
1547 | "csky: no subu sp,sp,r4; NOT altering" | |
1548 | " stacksize.\n"); | |
9d24df82 HAQ |
1549 | } |
1550 | break; | |
1551 | } | |
1552 | } | |
1553 | else | |
1554 | { | |
1555 | /* insn_len != 4. */ | |
1556 | ||
1557 | /* subi.sp sp,disp. */ | |
1558 | if (CSKY_16_IS_SUBI0 (insn)) | |
1559 | { | |
1560 | int offset = CSKY_16_SUBI_IMM (insn); | |
1561 | if (csky_debug) | |
1562 | { | |
6cb06a8c TT |
1563 | gdb_printf (gdb_stdlog, |
1564 | "csky: got subi r0,%d; continuing\n", | |
1565 | offset); | |
9d24df82 HAQ |
1566 | } |
1567 | stacksize += offset; | |
1568 | continue; | |
1569 | } | |
1570 | /* stw.16 rz,(sp,disp). */ | |
1571 | else if (CSKY_16_IS_STWx0 (insn)) | |
1572 | { | |
1573 | /* Spill register: see note for IS_STM above. */ | |
1574 | int disp; | |
1575 | ||
1576 | rn = CSKY_16_ST_VAL_REGNUM (insn); | |
1577 | disp = CSKY_16_ST_OFFSET (insn); | |
1578 | register_offsets[rn] = stacksize - disp; | |
1579 | if (csky_debug) | |
1580 | print_savedreg_msg (rn, register_offsets, true); | |
1581 | continue; | |
1582 | } | |
1583 | else if (CSKY_16_IS_MOV_FP_SP (insn)) | |
1584 | { | |
1585 | /* SP is saved to FP reg, means prologue may modify SP. */ | |
1586 | is_fp_saved = 1; | |
1587 | adjust_fp = stacksize; | |
1588 | continue; | |
1589 | } | |
1590 | else if (CSKY_16_IS_PUSH (insn)) | |
1591 | { | |
1592 | /* Push for 16_bit. */ | |
1593 | int offset = 0; | |
1594 | if (CSKY_16_IS_PUSH_R15 (insn)) | |
1595 | { | |
1596 | stacksize += 4; | |
1597 | register_offsets[15] = stacksize; | |
1598 | if (csky_debug) | |
1599 | print_savedreg_msg (15, register_offsets, false); | |
1600 | offset += 4; | |
1601 | } | |
1602 | if (CSKY_16_PUSH_LIST1 (insn)) | |
1603 | { | |
1604 | int num = CSKY_16_PUSH_LIST1 (insn); | |
1605 | int tmp = 0; | |
1606 | stacksize += num * 4; | |
1607 | offset += num * 4; | |
1608 | if (csky_debug) | |
1609 | { | |
6cb06a8c TT |
1610 | gdb_printf (gdb_stdlog, |
1611 | "csky: push regs_array: r4-r%d\n", | |
1612 | 4 + num - 1); | |
9d24df82 HAQ |
1613 | } |
1614 | for (rn = 4; rn <= 4 + num - 1; rn++) | |
1615 | { | |
1616 | register_offsets[rn] = stacksize - tmp; | |
1617 | if (csky_debug) | |
1618 | { | |
6cb06a8c TT |
1619 | gdb_printf (gdb_stdlog, |
1620 | "csky: r%d saved at 0x%x" | |
1621 | " (offset %d)\n", rn, | |
1622 | register_offsets[rn], offset); | |
9d24df82 HAQ |
1623 | } |
1624 | tmp += 4; | |
1625 | } | |
1626 | } | |
1627 | ||
1628 | framesize = stacksize; | |
1629 | if (csky_debug) | |
6cb06a8c | 1630 | gdb_printf (gdb_stdlog, "csky: continuing\n"); |
9d24df82 HAQ |
1631 | continue; |
1632 | } | |
1633 | else if (CSKY_16_IS_LRW4 (insn) || CSKY_16_IS_MOVI4 (insn)) | |
1634 | { | |
1635 | int adjust = 0; | |
9d24df82 HAQ |
1636 | unsigned int insn2; |
1637 | ||
1638 | if (csky_debug) | |
1639 | { | |
6cb06a8c TT |
1640 | gdb_printf (gdb_stdlog, |
1641 | "csky: looking at large frame\n"); | |
9d24df82 HAQ |
1642 | } |
1643 | if (CSKY_16_IS_LRW4 (insn)) | |
1644 | { | |
1645 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
1646 | int offset = ((insn & 0x300) >> 3) | (insn & 0x1f); | |
1647 | int literal_addr = (addr + ( offset << 2)) & 0xfffffffc; | |
1648 | adjust = read_memory_unsigned_integer (literal_addr, 4, | |
1649 | byte_order); | |
1650 | } | |
1651 | else | |
1652 | { | |
1653 | /* CSKY_16_IS_MOVI4 (insn). */ | |
1654 | adjust = (insn & 0xff); | |
1655 | } | |
1656 | ||
1657 | if (csky_debug) | |
1658 | { | |
6cb06a8c TT |
1659 | gdb_printf (gdb_stdlog, |
1660 | "csky: base stacksize=0x%x\n", adjust); | |
9d24df82 HAQ |
1661 | } |
1662 | ||
1663 | /* May have zero or more instructions which modify r4. */ | |
1664 | if (csky_debug) | |
1665 | { | |
6cb06a8c TT |
1666 | gdb_printf (gdb_stdlog, |
1667 | "csky: looking for r4 adjusters...\n"); | |
9d24df82 | 1668 | } |
b926417a | 1669 | int offset = 2; |
9d24df82 HAQ |
1670 | insn_len = csky_get_insn (gdbarch, addr + offset, &insn2); |
1671 | while (CSKY_IS_R4_ADJUSTER (insn2)) | |
1672 | { | |
1673 | if (CSKY_32_IS_ADDI4 (insn2)) | |
1674 | { | |
1675 | int imm = (insn2 & 0xfff) + 1; | |
1676 | adjust += imm; | |
1677 | if (csky_debug) | |
1678 | { | |
6cb06a8c TT |
1679 | gdb_printf (gdb_stdlog, |
1680 | "csky: addi r4,%d\n", imm); | |
9d24df82 HAQ |
1681 | } |
1682 | } | |
1683 | else if (CSKY_32_IS_SUBI4 (insn2)) | |
1684 | { | |
1685 | int imm = (insn2 & 0xfff) + 1; | |
1686 | adjust -= imm; | |
1687 | if (csky_debug) | |
1688 | { | |
6cb06a8c TT |
1689 | gdb_printf (gdb_stdlog, |
1690 | "csky: subi r4,%d\n", imm); | |
9d24df82 HAQ |
1691 | } |
1692 | } | |
1693 | else if (CSKY_32_IS_NOR4 (insn2)) | |
1694 | { | |
1695 | adjust = ~adjust; | |
1696 | if (csky_debug) | |
1697 | { | |
6cb06a8c TT |
1698 | gdb_printf (gdb_stdlog, |
1699 | "csky: nor r4,r4,r4\n"); | |
9d24df82 HAQ |
1700 | } |
1701 | } | |
1702 | else if (CSKY_32_IS_ROTLI4 (insn2)) | |
1703 | { | |
1704 | int imm = ((insn2 >> 21) & 0x1f); | |
1705 | int temp = adjust >> (32 - imm); | |
1706 | adjust <<= imm; | |
1707 | adjust |= temp; | |
1708 | if (csky_debug) | |
1709 | { | |
6cb06a8c TT |
1710 | gdb_printf (gdb_stdlog, |
1711 | "csky: rotli r4,r4,%d\n", imm); | |
9d24df82 HAQ |
1712 | } |
1713 | } | |
1714 | else if (CSKY_32_IS_LISI4 (insn2)) | |
1715 | { | |
1716 | int imm = ((insn2 >> 21) & 0x1f); | |
1717 | adjust <<= imm; | |
1718 | if (csky_debug) | |
1719 | { | |
6cb06a8c TT |
1720 | gdb_printf (gdb_stdlog, |
1721 | "csky: lsli r4,r4,%d\n", imm); | |
9d24df82 HAQ |
1722 | } |
1723 | } | |
1724 | else if (CSKY_32_IS_BSETI4 (insn2)) | |
1725 | { | |
1726 | int imm = ((insn2 >> 21) & 0x1f); | |
1727 | adjust |= (1 << imm); | |
1728 | if (csky_debug) | |
1729 | { | |
6cb06a8c TT |
1730 | gdb_printf (gdb_stdlog, |
1731 | "csky: bseti r4,r4 %d\n", imm); | |
9d24df82 HAQ |
1732 | } |
1733 | } | |
1734 | else if (CSKY_32_IS_BCLRI4 (insn2)) | |
1735 | { | |
1736 | int imm = ((insn2 >> 21) & 0x1f); | |
1737 | adjust &= ~(1 << imm); | |
1738 | if (csky_debug) | |
1739 | { | |
6cb06a8c TT |
1740 | gdb_printf (gdb_stdlog, |
1741 | "csky: bclri r4,r4 %d\n", imm); | |
9d24df82 HAQ |
1742 | } |
1743 | } | |
1744 | else if (CSKY_32_IS_IXH4 (insn2)) | |
1745 | { | |
1746 | adjust *= 3; | |
1747 | if (csky_debug) | |
1748 | { | |
6cb06a8c TT |
1749 | gdb_printf (gdb_stdlog, |
1750 | "csky: ixh r4,r4,r4\n"); | |
9d24df82 HAQ |
1751 | } |
1752 | } | |
1753 | else if (CSKY_32_IS_IXW4 (insn2)) | |
1754 | { | |
1755 | adjust *= 5; | |
1756 | if (csky_debug) | |
1757 | { | |
6cb06a8c TT |
1758 | gdb_printf (gdb_stdlog, |
1759 | "csky: ixw r4,r4,r4\n"); | |
9d24df82 HAQ |
1760 | } |
1761 | } | |
1762 | else if (CSKY_16_IS_ADDI4 (insn2)) | |
1763 | { | |
1764 | int imm = (insn2 & 0xff) + 1; | |
1765 | adjust += imm; | |
1766 | if (csky_debug) | |
1767 | { | |
6cb06a8c TT |
1768 | gdb_printf (gdb_stdlog, |
1769 | "csky: addi r4,%d\n", imm); | |
9d24df82 HAQ |
1770 | } |
1771 | } | |
1772 | else if (CSKY_16_IS_SUBI4 (insn2)) | |
1773 | { | |
1774 | int imm = (insn2 & 0xff) + 1; | |
1775 | adjust -= imm; | |
1776 | if (csky_debug) | |
1777 | { | |
6cb06a8c TT |
1778 | gdb_printf (gdb_stdlog, |
1779 | "csky: subi r4,%d\n", imm); | |
9d24df82 HAQ |
1780 | } |
1781 | } | |
1782 | else if (CSKY_16_IS_NOR4 (insn2)) | |
1783 | { | |
1784 | adjust = ~adjust; | |
1785 | if (csky_debug) | |
1786 | { | |
6cb06a8c TT |
1787 | gdb_printf (gdb_stdlog, |
1788 | "csky: nor r4,r4\n"); | |
9d24df82 HAQ |
1789 | } |
1790 | } | |
1791 | else if (CSKY_16_IS_BSETI4 (insn2)) | |
1792 | { | |
1793 | int imm = (insn2 & 0x1f); | |
1794 | adjust |= (1 << imm); | |
1795 | if (csky_debug) | |
1796 | { | |
6cb06a8c TT |
1797 | gdb_printf (gdb_stdlog, |
1798 | "csky: bseti r4, %d\n", imm); | |
9d24df82 HAQ |
1799 | } |
1800 | } | |
1801 | else if (CSKY_16_IS_BCLRI4 (insn2)) | |
1802 | { | |
1803 | int imm = (insn2 & 0x1f); | |
1804 | adjust &= ~(1 << imm); | |
1805 | if (csky_debug) | |
1806 | { | |
6cb06a8c TT |
1807 | gdb_printf (gdb_stdlog, |
1808 | "csky: bclri r4, %d\n", imm); | |
9d24df82 HAQ |
1809 | } |
1810 | } | |
1811 | else if (CSKY_16_IS_LSLI4 (insn2)) | |
1812 | { | |
1813 | int imm = (insn2 & 0x1f); | |
1814 | adjust <<= imm; | |
1815 | if (csky_debug) | |
1816 | { | |
6cb06a8c TT |
1817 | gdb_printf (gdb_stdlog, |
1818 | "csky: lsli r4,r4, %d\n", imm); | |
9d24df82 HAQ |
1819 | } |
1820 | } | |
1821 | ||
1822 | offset += insn_len; | |
1823 | insn_len = csky_get_insn (gdbarch, addr + offset, &insn2); | |
1824 | }; | |
1825 | ||
1826 | if (csky_debug) | |
1827 | { | |
6cb06a8c TT |
1828 | gdb_printf (gdb_stdlog, "csky: " |
1829 | "done looking for r4 adjusters\n"); | |
9d24df82 HAQ |
1830 | } |
1831 | ||
1832 | /* If the next instruction adjusts the stack pointer, we keep | |
1833 | everything; if not, we scrap it and we've found the end | |
1834 | of the prologue. */ | |
1835 | if (CSKY_IS_SUBU4 (insn2)) | |
1836 | { | |
1837 | addr += offset; | |
1838 | stacksize += adjust; | |
1839 | if (csky_debug) | |
1840 | { | |
6cb06a8c TT |
1841 | gdb_printf (gdb_stdlog, "csky: " |
1842 | "found stack adjustment of 0x%x" | |
1843 | " bytes.\n", adjust); | |
1844 | gdb_printf (gdb_stdlog, "csky: " | |
1845 | "skipping to new address %s\n", | |
1846 | core_addr_to_string_nz (addr)); | |
1847 | gdb_printf (gdb_stdlog, "csky: continuing\n"); | |
9d24df82 HAQ |
1848 | } |
1849 | continue; | |
1850 | } | |
1851 | ||
1852 | /* None of these instructions are prologue, so don't touch | |
1853 | anything. */ | |
1854 | if (csky_debug) | |
1855 | { | |
6cb06a8c TT |
1856 | gdb_printf (gdb_stdlog, "csky: no subu sp,r4; " |
1857 | "NOT altering stacksize.\n"); | |
9d24df82 HAQ |
1858 | } |
1859 | break; | |
1860 | } | |
1861 | } | |
1862 | ||
1863 | /* This is not a prologue instruction, so stop here. */ | |
1864 | if (csky_debug) | |
1865 | { | |
6cb06a8c TT |
1866 | gdb_printf (gdb_stdlog, "csky: insn is not a prologue" |
1867 | " insn -- ending scan\n"); | |
9d24df82 HAQ |
1868 | } |
1869 | break; | |
1870 | } | |
1871 | ||
1872 | if (this_cache) | |
1873 | { | |
1874 | CORE_ADDR unwound_fp; | |
1875 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
1876 | this_cache->framesize = framesize; | |
1877 | ||
1878 | if (is_fp_saved) | |
1879 | { | |
1880 | this_cache->framereg = CSKY_FP_REGNUM; | |
1881 | unwound_fp = get_frame_register_unsigned (this_frame, | |
1882 | this_cache->framereg); | |
1883 | this_cache->prev_sp = unwound_fp + adjust_fp; | |
1884 | } | |
1885 | else | |
1886 | { | |
1887 | this_cache->framereg = CSKY_SP_REGNUM; | |
1888 | unwound_fp = get_frame_register_unsigned (this_frame, | |
1889 | this_cache->framereg); | |
1890 | this_cache->prev_sp = unwound_fp + stacksize; | |
1891 | } | |
1892 | ||
1893 | /* Note where saved registers are stored. The offsets in | |
1894 | REGISTER_OFFSETS are computed relative to the top of the frame. */ | |
1895 | for (rn = 0; rn < CSKY_NUM_GREGS; rn++) | |
1896 | { | |
1897 | if (register_offsets[rn] >= 0) | |
1898 | { | |
098caef4 LM |
1899 | this_cache->saved_regs[rn].set_addr (this_cache->prev_sp |
1900 | - register_offsets[rn]); | |
9d24df82 HAQ |
1901 | if (csky_debug) |
1902 | { | |
1903 | CORE_ADDR rn_value = read_memory_unsigned_integer ( | |
098caef4 | 1904 | this_cache->saved_regs[rn].addr (), 4, byte_order); |
6cb06a8c TT |
1905 | gdb_printf (gdb_stdlog, "Saved register %s " |
1906 | "stored at 0x%08lx, value=0x%08lx\n", | |
1907 | csky_register_names[rn], | |
1908 | (unsigned long) | |
1909 | this_cache->saved_regs[rn].addr (), | |
1910 | (unsigned long) rn_value); | |
9d24df82 HAQ |
1911 | } |
1912 | } | |
1913 | } | |
1914 | if (lr_type == LR_TYPE_EPC) | |
1915 | { | |
1916 | /* rte || epc . */ | |
1917 | this_cache->saved_regs[CSKY_PC_REGNUM] | |
1918 | = this_cache->saved_regs[CSKY_EPC_REGNUM]; | |
1919 | } | |
1920 | else if (lr_type == LR_TYPE_FPC) | |
1921 | { | |
1922 | /* rfi || fpc . */ | |
1923 | this_cache->saved_regs[CSKY_PC_REGNUM] | |
1924 | = this_cache->saved_regs[CSKY_FPC_REGNUM]; | |
1925 | } | |
1926 | else | |
1927 | { | |
1928 | this_cache->saved_regs[CSKY_PC_REGNUM] | |
1929 | = this_cache->saved_regs[CSKY_LR_REGNUM]; | |
1930 | } | |
1931 | } | |
1932 | ||
1933 | return addr; | |
1934 | } | |
1935 | ||
1936 | /* Detect whether PC is at a point where the stack frame has been | |
1937 | destroyed. */ | |
1938 | ||
1939 | static int | |
1940 | csky_stack_frame_destroyed_p (struct gdbarch *gdbarch, CORE_ADDR pc) | |
1941 | { | |
1942 | unsigned int insn; | |
1943 | CORE_ADDR addr; | |
1944 | CORE_ADDR func_start, func_end; | |
1945 | ||
1946 | if (!find_pc_partial_function (pc, NULL, &func_start, &func_end)) | |
1947 | return 0; | |
1948 | ||
1949 | bool fp_saved = false; | |
1950 | int insn_len; | |
1951 | for (addr = func_start; addr < func_end; addr += insn_len) | |
1952 | { | |
1953 | /* Get next insn. */ | |
1954 | insn_len = csky_get_insn (gdbarch, addr, &insn); | |
1955 | ||
1956 | if (insn_len == 2) | |
1957 | { | |
1958 | /* Is sp is saved to fp. */ | |
1959 | if (CSKY_16_IS_MOV_FP_SP (insn)) | |
1960 | fp_saved = true; | |
1961 | /* If sp was saved to fp and now being restored from | |
1962 | fp then it indicates the start of epilog. */ | |
1963 | else if (fp_saved && CSKY_16_IS_MOV_SP_FP (insn)) | |
1964 | return pc >= addr; | |
1965 | } | |
1966 | } | |
1967 | return 0; | |
1968 | } | |
1969 | ||
1970 | /* Implement the skip_prologue gdbarch hook. */ | |
1971 | ||
1972 | static CORE_ADDR | |
1973 | csky_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc) | |
1974 | { | |
1975 | CORE_ADDR func_addr, func_end; | |
9d24df82 HAQ |
1976 | const int default_search_limit = 128; |
1977 | ||
1978 | /* See if we can find the end of the prologue using the symbol table. */ | |
1979 | if (find_pc_partial_function (pc, NULL, &func_addr, &func_end)) | |
1980 | { | |
1981 | CORE_ADDR post_prologue_pc | |
1982 | = skip_prologue_using_sal (gdbarch, func_addr); | |
1983 | ||
1984 | if (post_prologue_pc != 0) | |
1985 | return std::max (pc, post_prologue_pc); | |
1986 | } | |
1987 | else | |
1988 | func_end = pc + default_search_limit; | |
1989 | ||
1990 | /* Find the end of prologue. Default lr_type. */ | |
1991 | return csky_analyze_prologue (gdbarch, pc, func_end, func_end, | |
1992 | NULL, NULL, LR_TYPE_R15); | |
1993 | } | |
1994 | ||
1995 | /* Implement the breakpoint_kind_from_pc gdbarch method. */ | |
1996 | ||
1997 | static int | |
1998 | csky_breakpoint_kind_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr) | |
1999 | { | |
2000 | if (csky_pc_is_csky16 (gdbarch, *pcptr)) | |
2001 | return CSKY_INSN_SIZE16; | |
2002 | else | |
2003 | return CSKY_INSN_SIZE32; | |
2004 | } | |
2005 | ||
2006 | /* Implement the sw_breakpoint_from_kind gdbarch method. */ | |
2007 | ||
2008 | static const gdb_byte * | |
2009 | csky_sw_breakpoint_from_kind (struct gdbarch *gdbarch, int kind, int *size) | |
2010 | { | |
2011 | *size = kind; | |
2012 | if (kind == CSKY_INSN_SIZE16) | |
2013 | { | |
2014 | static gdb_byte csky_16_breakpoint[] = { 0, 0 }; | |
2015 | return csky_16_breakpoint; | |
2016 | } | |
2017 | else | |
2018 | { | |
2019 | static gdb_byte csky_32_breakpoint[] = { 0, 0, 0, 0 }; | |
2020 | return csky_32_breakpoint; | |
2021 | } | |
2022 | } | |
2023 | ||
9d24df82 HAQ |
2024 | /* Determine link register type. */ |
2025 | ||
2026 | static lr_type_t | |
2027 | csky_analyze_lr_type (struct gdbarch *gdbarch, | |
2028 | CORE_ADDR start_pc, CORE_ADDR end_pc) | |
2029 | { | |
2030 | CORE_ADDR addr; | |
2031 | unsigned int insn, insn_len; | |
2032 | insn_len = 2; | |
2033 | ||
2034 | for (addr = start_pc; addr < end_pc; addr += insn_len) | |
2035 | { | |
2036 | insn_len = csky_get_insn (gdbarch, addr, &insn); | |
2037 | if (insn_len == 4) | |
2038 | { | |
2039 | if (CSKY_32_IS_MFCR_EPSR (insn) || CSKY_32_IS_MFCR_EPC (insn) | |
2040 | || CSKY_32_IS_RTE (insn)) | |
2041 | return LR_TYPE_EPC; | |
2042 | } | |
2043 | else if (CSKY_32_IS_MFCR_FPSR (insn) || CSKY_32_IS_MFCR_FPC (insn) | |
2044 | || CSKY_32_IS_RFI (insn)) | |
2045 | return LR_TYPE_FPC; | |
2046 | else if (CSKY_32_IS_JMP (insn) || CSKY_32_IS_BR (insn) | |
2047 | || CSKY_32_IS_JMPIX (insn) || CSKY_32_IS_JMPI (insn)) | |
2048 | return LR_TYPE_R15; | |
2049 | else | |
2050 | { | |
2051 | /* 16 bit instruction. */ | |
2052 | if (CSKY_16_IS_JMP (insn) || CSKY_16_IS_BR (insn) | |
2053 | || CSKY_16_IS_JMPIX (insn)) | |
2054 | return LR_TYPE_R15; | |
2055 | } | |
2056 | } | |
2057 | return LR_TYPE_R15; | |
2058 | } | |
2059 | ||
2060 | /* Heuristic unwinder. */ | |
2061 | ||
2062 | static struct csky_unwind_cache * | |
bd2b40ac | 2063 | csky_frame_unwind_cache (frame_info_ptr this_frame) |
9d24df82 HAQ |
2064 | { |
2065 | CORE_ADDR prologue_start, prologue_end, func_end, prev_pc, block_addr; | |
2066 | struct csky_unwind_cache *cache; | |
2067 | const struct block *bl; | |
2068 | unsigned long func_size = 0; | |
2069 | struct gdbarch *gdbarch = get_frame_arch (this_frame); | |
2070 | unsigned int sp_regnum = CSKY_SP_REGNUM; | |
2071 | ||
2072 | /* Default lr type is r15. */ | |
2073 | lr_type_t lr_type = LR_TYPE_R15; | |
2074 | ||
2075 | cache = FRAME_OBSTACK_ZALLOC (struct csky_unwind_cache); | |
2076 | cache->saved_regs = trad_frame_alloc_saved_regs (this_frame); | |
2077 | ||
2078 | /* Assume there is no frame until proven otherwise. */ | |
2079 | cache->framereg = sp_regnum; | |
2080 | ||
2081 | cache->framesize = 0; | |
2082 | ||
2083 | prev_pc = get_frame_pc (this_frame); | |
2084 | block_addr = get_frame_address_in_block (this_frame); | |
2085 | if (find_pc_partial_function (block_addr, NULL, &prologue_start, | |
2086 | &func_end) == 0) | |
2087 | /* We couldn't find a function containing block_addr, so bail out | |
2088 | and hope for the best. */ | |
2089 | return cache; | |
2090 | ||
2091 | /* Get the (function) symbol matching prologue_start. */ | |
2092 | bl = block_for_pc (prologue_start); | |
2093 | if (bl != NULL) | |
4b8791e1 | 2094 | func_size = bl->end () - bl->start (); |
9d24df82 HAQ |
2095 | else |
2096 | { | |
2097 | struct bound_minimal_symbol msymbol | |
2098 | = lookup_minimal_symbol_by_pc (prologue_start); | |
2099 | if (msymbol.minsym != NULL) | |
5bbfd12d | 2100 | func_size = msymbol.minsym->size (); |
9d24df82 HAQ |
2101 | } |
2102 | ||
2103 | /* If FUNC_SIZE is 0 we may have a special-case use of lr | |
2104 | e.g. exception or interrupt. */ | |
2105 | if (func_size == 0) | |
2106 | lr_type = csky_analyze_lr_type (gdbarch, prologue_start, func_end); | |
2107 | ||
2108 | prologue_end = std::min (func_end, prev_pc); | |
2109 | ||
2110 | /* Analyze the function prologue. */ | |
2111 | csky_analyze_prologue (gdbarch, prologue_start, prologue_end, | |
2112 | func_end, this_frame, cache, lr_type); | |
2113 | ||
2114 | /* gdbarch_sp_regnum contains the value and not the address. */ | |
a9a87d35 | 2115 | cache->saved_regs[sp_regnum].set_value (cache->prev_sp); |
9d24df82 HAQ |
2116 | return cache; |
2117 | } | |
2118 | ||
9d24df82 HAQ |
2119 | /* Implement the this_id function for the normal unwinder. */ |
2120 | ||
2121 | static void | |
bd2b40ac | 2122 | csky_frame_this_id (frame_info_ptr this_frame, |
9d24df82 HAQ |
2123 | void **this_prologue_cache, struct frame_id *this_id) |
2124 | { | |
2125 | struct csky_unwind_cache *cache; | |
2126 | struct frame_id id; | |
2127 | ||
2128 | if (*this_prologue_cache == NULL) | |
2129 | *this_prologue_cache = csky_frame_unwind_cache (this_frame); | |
2130 | cache = (struct csky_unwind_cache *) *this_prologue_cache; | |
2131 | ||
2132 | /* This marks the outermost frame. */ | |
2133 | if (cache->prev_sp == 0) | |
2134 | return; | |
2135 | ||
2136 | id = frame_id_build (cache->prev_sp, get_frame_func (this_frame)); | |
2137 | *this_id = id; | |
2138 | } | |
2139 | ||
2140 | /* Implement the prev_register function for the normal unwinder. */ | |
2141 | ||
2142 | static struct value * | |
bd2b40ac | 2143 | csky_frame_prev_register (frame_info_ptr this_frame, |
9d24df82 HAQ |
2144 | void **this_prologue_cache, int regnum) |
2145 | { | |
2146 | struct csky_unwind_cache *cache; | |
2147 | ||
2148 | if (*this_prologue_cache == NULL) | |
2149 | *this_prologue_cache = csky_frame_unwind_cache (this_frame); | |
2150 | cache = (struct csky_unwind_cache *) *this_prologue_cache; | |
2151 | ||
2152 | return trad_frame_get_prev_register (this_frame, cache->saved_regs, | |
2153 | regnum); | |
2154 | } | |
2155 | ||
2156 | /* Data structures for the normal prologue-analysis-based | |
2157 | unwinder. */ | |
2158 | ||
2159 | static const struct frame_unwind csky_unwind_cache = { | |
a154d838 | 2160 | "cski prologue", |
9d24df82 HAQ |
2161 | NORMAL_FRAME, |
2162 | default_frame_unwind_stop_reason, | |
2163 | csky_frame_this_id, | |
2164 | csky_frame_prev_register, | |
2165 | NULL, | |
2166 | default_frame_sniffer, | |
2167 | NULL, | |
2168 | NULL | |
2169 | }; | |
2170 | ||
d354e0c8 | 2171 | static CORE_ADDR |
bd2b40ac | 2172 | csky_check_long_branch (frame_info_ptr frame, CORE_ADDR pc) |
d354e0c8 JL |
2173 | { |
2174 | gdb_byte buf[8]; | |
2175 | struct gdbarch *gdbarch = get_frame_arch (frame); | |
2176 | enum bfd_endian byte_order_for_code | |
2177 | = gdbarch_byte_order_for_code (gdbarch); | |
2178 | ||
2179 | if (target_read_memory (pc, buf, 8) == 0) | |
2180 | { | |
2181 | unsigned int data0 | |
2182 | = extract_unsigned_integer (buf, 4, byte_order_for_code); | |
2183 | unsigned int data1 | |
2184 | = extract_unsigned_integer (buf + 4, 4, byte_order_for_code); | |
2185 | ||
2186 | /* Case: jmpi [pc+4] : 0xeac00001 | |
2187 | .long addr */ | |
2188 | if (data0 == CSKY_JMPI_PC_4) | |
2189 | return data1; | |
2190 | ||
2191 | /* Case: lrw t1, [pc+8] : 0xea8d0002 | |
2192 | jmp t1 : 0x7834 | |
2193 | nop : 0x6c03 | |
2194 | .long addr */ | |
2195 | if ((data0 == CSKY_LRW_T1_PC_8) && (data1 == CSKY_JMP_T1_VS_NOP)) | |
2196 | { | |
2197 | if (target_read_memory (pc + 8, buf, 4) == 0) | |
2198 | return extract_unsigned_integer (buf, 4, byte_order_for_code); | |
2199 | } | |
9d24df82 | 2200 | |
d354e0c8 JL |
2201 | return 0; |
2202 | } | |
2203 | ||
2204 | return 0; | |
2205 | } | |
9d24df82 HAQ |
2206 | |
2207 | static int | |
2208 | csky_stub_unwind_sniffer (const struct frame_unwind *self, | |
bd2b40ac | 2209 | frame_info_ptr this_frame, |
d354e0c8 | 2210 | void **this_prologue_cache) |
9d24df82 | 2211 | { |
d354e0c8 JL |
2212 | CORE_ADDR addr_in_block, pc; |
2213 | gdb_byte dummy[4]; | |
2214 | const char *name; | |
2215 | CORE_ADDR start_addr; | |
9d24df82 | 2216 | |
d354e0c8 | 2217 | /* Get pc */ |
9d24df82 | 2218 | addr_in_block = get_frame_address_in_block (this_frame); |
d354e0c8 | 2219 | pc = get_frame_pc (this_frame); |
9d24df82 | 2220 | |
d354e0c8 JL |
2221 | if (in_plt_section (addr_in_block) |
2222 | || target_read_memory (pc, dummy, 4) != 0) | |
9d24df82 HAQ |
2223 | return 1; |
2224 | ||
d354e0c8 JL |
2225 | /* Find the starting address and name of the function containing the PC. */ |
2226 | if (find_pc_partial_function (pc, &name, &start_addr, NULL) == 0) | |
2227 | { | |
2228 | start_addr = csky_check_long_branch (this_frame, pc); | |
2229 | /* if not long branch, return 0. */ | |
2230 | if (start_addr != 0) | |
2231 | return 1; | |
2232 | ||
2233 | return 0; | |
2234 | } | |
2235 | ||
9d24df82 HAQ |
2236 | return 0; |
2237 | } | |
2238 | ||
2239 | static struct csky_unwind_cache * | |
bd2b40ac | 2240 | csky_make_stub_cache (frame_info_ptr this_frame) |
9d24df82 HAQ |
2241 | { |
2242 | struct csky_unwind_cache *cache; | |
2243 | ||
2244 | cache = FRAME_OBSTACK_ZALLOC (struct csky_unwind_cache); | |
2245 | cache->saved_regs = trad_frame_alloc_saved_regs (this_frame); | |
2246 | cache->prev_sp = get_frame_register_unsigned (this_frame, CSKY_SP_REGNUM); | |
2247 | ||
2248 | return cache; | |
2249 | } | |
2250 | ||
2251 | static void | |
bd2b40ac | 2252 | csky_stub_this_id (frame_info_ptr this_frame, |
9d24df82 HAQ |
2253 | void **this_cache, |
2254 | struct frame_id *this_id) | |
2255 | { | |
2256 | struct csky_unwind_cache *cache; | |
2257 | ||
2258 | if (*this_cache == NULL) | |
2259 | *this_cache = csky_make_stub_cache (this_frame); | |
2260 | cache = (struct csky_unwind_cache *) *this_cache; | |
2261 | ||
2262 | /* Our frame ID for a stub frame is the current SP and LR. */ | |
2263 | *this_id = frame_id_build (cache->prev_sp, get_frame_pc (this_frame)); | |
2264 | } | |
2265 | ||
2266 | static struct value * | |
bd2b40ac | 2267 | csky_stub_prev_register (frame_info_ptr this_frame, |
9d24df82 HAQ |
2268 | void **this_cache, |
2269 | int prev_regnum) | |
2270 | { | |
2271 | struct csky_unwind_cache *cache; | |
2272 | ||
2273 | if (*this_cache == NULL) | |
2274 | *this_cache = csky_make_stub_cache (this_frame); | |
2275 | cache = (struct csky_unwind_cache *) *this_cache; | |
2276 | ||
2277 | /* If we are asked to unwind the PC, then return the LR. */ | |
2278 | if (prev_regnum == CSKY_PC_REGNUM) | |
2279 | { | |
2280 | CORE_ADDR lr; | |
2281 | ||
2282 | lr = frame_unwind_register_unsigned (this_frame, CSKY_LR_REGNUM); | |
2283 | return frame_unwind_got_constant (this_frame, prev_regnum, lr); | |
2284 | } | |
2285 | ||
2286 | if (prev_regnum == CSKY_SP_REGNUM) | |
2287 | return frame_unwind_got_constant (this_frame, prev_regnum, cache->prev_sp); | |
2288 | ||
2289 | return trad_frame_get_prev_register (this_frame, cache->saved_regs, | |
2290 | prev_regnum); | |
2291 | } | |
2292 | ||
6bd434d6 | 2293 | static frame_unwind csky_stub_unwind = { |
a154d838 | 2294 | "csky stub", |
9d24df82 HAQ |
2295 | NORMAL_FRAME, |
2296 | default_frame_unwind_stop_reason, | |
2297 | csky_stub_this_id, | |
2298 | csky_stub_prev_register, | |
2299 | NULL, | |
2300 | csky_stub_unwind_sniffer | |
2301 | }; | |
2302 | ||
2303 | /* Implement the this_base, this_locals, and this_args hooks | |
2304 | for the normal unwinder. */ | |
2305 | ||
2306 | static CORE_ADDR | |
bd2b40ac | 2307 | csky_frame_base_address (frame_info_ptr this_frame, void **this_cache) |
9d24df82 HAQ |
2308 | { |
2309 | struct csky_unwind_cache *cache; | |
2310 | ||
2311 | if (*this_cache == NULL) | |
2312 | *this_cache = csky_frame_unwind_cache (this_frame); | |
2313 | cache = (struct csky_unwind_cache *) *this_cache; | |
2314 | ||
2315 | return cache->prev_sp - cache->framesize; | |
2316 | } | |
2317 | ||
2318 | static const struct frame_base csky_frame_base = { | |
2319 | &csky_unwind_cache, | |
2320 | csky_frame_base_address, | |
2321 | csky_frame_base_address, | |
2322 | csky_frame_base_address | |
2323 | }; | |
2324 | ||
9d24df82 HAQ |
2325 | /* Initialize register access method. */ |
2326 | ||
2327 | static void | |
2328 | csky_dwarf2_frame_init_reg (struct gdbarch *gdbarch, int regnum, | |
2329 | struct dwarf2_frame_state_reg *reg, | |
bd2b40ac | 2330 | frame_info_ptr this_frame) |
9d24df82 HAQ |
2331 | { |
2332 | if (regnum == gdbarch_pc_regnum (gdbarch)) | |
2333 | reg->how = DWARF2_FRAME_REG_RA; | |
2334 | else if (regnum == gdbarch_sp_regnum (gdbarch)) | |
2335 | reg->how = DWARF2_FRAME_REG_CFA; | |
2336 | } | |
2337 | ||
2338 | /* Create csky register groups. */ | |
2339 | ||
2340 | static void | |
2341 | csky_init_reggroup () | |
2342 | { | |
2343 | cr_reggroup = reggroup_new ("cr", USER_REGGROUP); | |
2344 | fr_reggroup = reggroup_new ("fr", USER_REGGROUP); | |
2345 | vr_reggroup = reggroup_new ("vr", USER_REGGROUP); | |
2346 | mmu_reggroup = reggroup_new ("mmu", USER_REGGROUP); | |
2347 | prof_reggroup = reggroup_new ("profiling", USER_REGGROUP); | |
2348 | } | |
2349 | ||
2350 | /* Add register groups into reggroup list. */ | |
2351 | ||
2352 | static void | |
2353 | csky_add_reggroups (struct gdbarch *gdbarch) | |
2354 | { | |
9d24df82 HAQ |
2355 | reggroup_add (gdbarch, cr_reggroup); |
2356 | reggroup_add (gdbarch, fr_reggroup); | |
2357 | reggroup_add (gdbarch, vr_reggroup); | |
2358 | reggroup_add (gdbarch, mmu_reggroup); | |
2359 | reggroup_add (gdbarch, prof_reggroup); | |
2360 | } | |
2361 | ||
2362 | /* Return the groups that a CSKY register can be categorised into. */ | |
2363 | ||
2364 | static int | |
2365 | csky_register_reggroup_p (struct gdbarch *gdbarch, int regnum, | |
dbf5d61b | 2366 | const struct reggroup *reggroup) |
9d24df82 HAQ |
2367 | { |
2368 | int raw_p; | |
2369 | ||
637b2f86 | 2370 | if (gdbarch_register_name (gdbarch, regnum)[0] == '\0') |
9d24df82 HAQ |
2371 | return 0; |
2372 | ||
2373 | if (reggroup == all_reggroup) | |
2374 | return 1; | |
2375 | ||
2376 | raw_p = regnum < gdbarch_num_regs (gdbarch); | |
2377 | if (reggroup == save_reggroup || reggroup == restore_reggroup) | |
2378 | return raw_p; | |
2379 | ||
4686f810 JL |
2380 | if ((((regnum >= CSKY_R0_REGNUM) && (regnum <= CSKY_R0_REGNUM + 31)) |
2381 | || (regnum == CSKY_PC_REGNUM) | |
2382 | || (regnum == CSKY_EPC_REGNUM) | |
2383 | || (regnum == CSKY_CR0_REGNUM) | |
2384 | || (regnum == CSKY_EPSR_REGNUM)) | |
9d24df82 HAQ |
2385 | && (reggroup == general_reggroup)) |
2386 | return 1; | |
2387 | ||
2388 | if (((regnum == CSKY_PC_REGNUM) | |
2389 | || ((regnum >= CSKY_CR0_REGNUM) | |
2390 | && (regnum <= CSKY_CR0_REGNUM + 30))) | |
2391 | && (reggroup == cr_reggroup)) | |
2392 | return 2; | |
2393 | ||
2394 | if ((((regnum >= CSKY_VR0_REGNUM) && (regnum <= CSKY_VR0_REGNUM + 15)) | |
afd53c3c JL |
2395 | || ((regnum >= CSKY_FCR_REGNUM) |
2396 | && (regnum <= CSKY_FCR_REGNUM + 2))) | |
9d24df82 HAQ |
2397 | && (reggroup == vr_reggroup)) |
2398 | return 3; | |
2399 | ||
2400 | if (((regnum >= CSKY_MMU_REGNUM) && (regnum <= CSKY_MMU_REGNUM + 8)) | |
2401 | && (reggroup == mmu_reggroup)) | |
2402 | return 4; | |
2403 | ||
2404 | if (((regnum >= CSKY_PROFCR_REGNUM) | |
2405 | && (regnum <= CSKY_PROFCR_REGNUM + 48)) | |
2406 | && (reggroup == prof_reggroup)) | |
2407 | return 5; | |
2408 | ||
2409 | if ((((regnum >= CSKY_FR0_REGNUM) && (regnum <= CSKY_FR0_REGNUM + 15)) | |
afd53c3c | 2410 | || ((regnum >= CSKY_FCR_REGNUM) && (regnum <= CSKY_FCR_REGNUM + 2))) |
9d24df82 HAQ |
2411 | && (reggroup == fr_reggroup)) |
2412 | return 6; | |
2413 | ||
4686f810 JL |
2414 | if (tdesc_has_registers (gdbarch_target_desc (gdbarch))) |
2415 | { | |
2416 | if (tdesc_register_in_reggroup_p (gdbarch, regnum, reggroup) > 0) | |
2417 | return 7; | |
2418 | } | |
2419 | ||
9d24df82 HAQ |
2420 | return 0; |
2421 | } | |
2422 | ||
2423 | /* Implement the dwarf2_reg_to_regnum gdbarch method. */ | |
2424 | ||
2425 | static int | |
2426 | csky_dwarf_reg_to_regnum (struct gdbarch *gdbarch, int dw_reg) | |
2427 | { | |
d5ffc11f | 2428 | /* For GPRs. */ |
4686f810 | 2429 | if (dw_reg >= CSKY_R0_REGNUM && dw_reg <= CSKY_R0_REGNUM + 31) |
d5ffc11f JL |
2430 | return dw_reg; |
2431 | ||
2432 | /* For Hi, Lo, PC. */ | |
4686f810 JL |
2433 | if (dw_reg == CSKY_HI_REGNUM || dw_reg == CSKY_LO_REGNUM |
2434 | || dw_reg == CSKY_PC_REGNUM) | |
d5ffc11f JL |
2435 | return dw_reg; |
2436 | ||
2437 | /* For Float and Vector pseudo registers. */ | |
4686f810 | 2438 | if (dw_reg >= FV_PSEUDO_REGNO_FIRST && dw_reg <= FV_PSEUDO_REGNO_LAST) |
d5ffc11f JL |
2439 | { |
2440 | char name_buf[4]; | |
2441 | ||
2442 | xsnprintf (name_buf, sizeof (name_buf), "s%d", | |
2443 | dw_reg - FV_PSEUDO_REGNO_FIRST); | |
2444 | return user_reg_map_name_to_regnum (gdbarch, name_buf, | |
2445 | strlen (name_buf)); | |
2446 | } | |
2447 | ||
2448 | /* Others, unknown. */ | |
2449 | return -1; | |
9d24df82 HAQ |
2450 | } |
2451 | ||
afd53c3c | 2452 | /* Check whether xml has discribled the essential regs. */ |
e3940312 | 2453 | |
afd53c3c JL |
2454 | static int |
2455 | csky_essential_reg_check (const struct csky_supported_tdesc_register *reg) | |
2456 | { | |
2457 | if ((strcmp (reg->name , "pc") == 0) | |
2458 | && (reg->num == CSKY_PC_REGNUM)) | |
2459 | return CSKY_TDESC_REGS_PC_NUMBERED; | |
2460 | else if ((strcmp (reg->name , "r14") == 0) | |
2461 | && (reg->num == CSKY_SP_REGNUM)) | |
2462 | return CSKY_TDESC_REGS_SP_NUMBERED; | |
2463 | else if ((strcmp (reg->name , "r15") == 0) | |
2464 | && (reg->num == CSKY_LR_REGNUM)) | |
2465 | return CSKY_TDESC_REGS_LR_NUMBERED; | |
2466 | else | |
2467 | return 0; | |
2468 | } | |
2469 | ||
e3940312 JL |
2470 | /* Check whether xml has discribled the fr0~fr15 regs. */ |
2471 | ||
2472 | static int | |
2473 | csky_fr0_fr15_reg_check (const struct csky_supported_tdesc_register *reg) { | |
2474 | int i = 0; | |
2475 | for (i = 0; i < 16; i++) | |
2476 | { | |
2477 | if ((strcmp (reg->name, csky_supported_fpu_regs[i].name) == 0) | |
2478 | && (csky_supported_fpu_regs[i].num == reg->num)) | |
2479 | return (1 << i); | |
2480 | } | |
2481 | ||
2482 | return 0; | |
2483 | }; | |
2484 | ||
2485 | /* Check whether xml has discribled the fr16~fr31 regs. */ | |
2486 | ||
2487 | static int | |
2488 | csky_fr16_fr31_reg_check (const struct csky_supported_tdesc_register *reg) { | |
2489 | int i = 0; | |
2490 | for (i = 0; i < 16; i++) | |
2491 | { | |
2492 | if ((strcmp (reg->name, csky_supported_fpu_regs[i + 16].name) == 0) | |
2493 | && (csky_supported_fpu_regs[i + 16].num == reg->num)) | |
2494 | return (1 << i); | |
2495 | } | |
2496 | ||
2497 | return 0; | |
2498 | }; | |
2499 | ||
2500 | /* Check whether xml has discribled the vr0~vr15 regs. */ | |
2501 | ||
2502 | static int | |
2503 | csky_vr0_vr15_reg_check (const struct csky_supported_tdesc_register *reg) { | |
2504 | int i = 0; | |
2505 | for (i = 0; i < 16; i++) | |
2506 | { | |
2507 | if ((strcmp (reg->name, csky_supported_fpu_regs[i + 32].name) == 0) | |
2508 | && (csky_supported_fpu_regs[i + 32].num == reg->num)) | |
2509 | return (1 << i); | |
2510 | } | |
2511 | ||
2512 | return 0; | |
2513 | }; | |
2514 | ||
2515 | /* Return pseudo reg's name. */ | |
2516 | ||
2517 | static const char * | |
2518 | csky_pseudo_register_name (struct gdbarch *gdbarch, int regno) | |
2519 | { | |
2520 | int num_regs = gdbarch_num_regs (gdbarch); | |
2521 | csky_gdbarch_tdep *tdep | |
08106042 | 2522 | = gdbarch_tdep<csky_gdbarch_tdep> (gdbarch); |
e3940312 JL |
2523 | |
2524 | regno -= num_regs; | |
2525 | ||
2526 | if (tdep->fv_pseudo_registers_count) | |
2527 | { | |
2528 | static const char *const fv_pseudo_names[] = { | |
2529 | "s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7", | |
2530 | "s8", "s9", "s10", "s11", "s12", "s13", "s14", "s15", | |
2531 | "s16", "s17", "s18", "s19", "s20", "s21", "s22", "s23", | |
2532 | "s24", "s25", "s26", "s27", "s28", "s29", "s30", "s31", | |
2533 | "s32", "s33", "s34", "s35", "s36", "s37", "s38", "s39", | |
2534 | "s40", "s41", "s42", "s43", "s44", "s45", "s46", "s47", | |
2535 | "s48", "s49", "s50", "s51", "s52", "s53", "s54", "s55", | |
2536 | "s56", "s57", "s58", "s59", "s60", "s61", "s62", "s63", | |
2537 | "s64", "s65", "s66", "s67", "s68", "s69", "s70", "s71", | |
2538 | "s72", "s73", "s74", "s75", "s76", "s77", "s78", "s79", | |
2539 | "s80", "s81", "s82", "s83", "s84", "s85", "s86", "s87", | |
2540 | "s88", "s89", "s90", "s91", "s92", "s93", "s94", "s95", | |
2541 | "s96", "s97", "s98", "s99", "s100", "s101", "s102", "s103", | |
2542 | "s104", "s105", "s106", "s107", "s108", "s109", "s110", "s111", | |
2543 | "s112", "s113", "s114", "s115", "s116", "s117", "s118", "s119", | |
2544 | "s120", "s121", "s122", "s123", "s124", "s125", "s126", "s127", | |
2545 | }; | |
2546 | ||
2547 | if (regno < tdep->fv_pseudo_registers_count) | |
2548 | { | |
2549 | if ((regno < 64) && ((regno % 4) >= 2) && !tdep->has_vr0) | |
7ac20d65 | 2550 | return ""; |
e3940312 | 2551 | else if ((regno >= 64) && ((regno % 4) >= 2)) |
7ac20d65 | 2552 | return ""; |
e3940312 JL |
2553 | else |
2554 | return fv_pseudo_names[regno]; | |
2555 | } | |
2556 | } | |
2557 | ||
7ac20d65 | 2558 | return ""; |
e3940312 JL |
2559 | } |
2560 | ||
2561 | /* Read for csky pseudo regs. */ | |
2562 | ||
2563 | static enum register_status | |
2564 | csky_pseudo_register_read (struct gdbarch *gdbarch, | |
2565 | struct readable_regcache *regcache, | |
2566 | int regnum, gdb_byte *buf) | |
2567 | { | |
2568 | int num_regs = gdbarch_num_regs (gdbarch); | |
2569 | csky_gdbarch_tdep *tdep | |
08106042 | 2570 | = gdbarch_tdep<csky_gdbarch_tdep> (gdbarch); |
e3940312 JL |
2571 | |
2572 | regnum -= num_regs; | |
2573 | ||
2574 | if (regnum < tdep->fv_pseudo_registers_count) | |
2575 | { | |
2576 | enum register_status status; | |
2577 | int gdb_regnum = 0; | |
2578 | int offset = 0; | |
2579 | gdb_byte reg_buf[16]; | |
2580 | ||
2581 | /* Ensure getting s0~s63 from vrx if tdep->has_vr0 is ture. */ | |
2582 | if (tdep->has_vr0) | |
2583 | { | |
2584 | if (regnum < 64) | |
2585 | { | |
2586 | gdb_regnum = CSKY_VR0_REGNUM + (regnum / 4); | |
2587 | offset = (regnum % 4) * 4; | |
2588 | } | |
2589 | else | |
2590 | { | |
2591 | gdb_regnum = CSKY_FR16_REGNUM + ((regnum - 64) / 4); | |
2592 | if ((regnum % 4) >= 2) | |
2593 | return REG_UNAVAILABLE; | |
2594 | offset = (regnum % 2) * 4; | |
2595 | } | |
2596 | } | |
2597 | else | |
2598 | { | |
2599 | gdb_regnum = CSKY_FR0_REGNUM + (regnum / 4); | |
2600 | if ((regnum % 4) >= 2) | |
2601 | return REG_UNAVAILABLE; | |
2602 | offset = (regnum % 2) * 4; | |
2603 | } | |
2604 | ||
2605 | status = regcache->raw_read (gdb_regnum, reg_buf); | |
2606 | if (status == REG_VALID) | |
2607 | memcpy (buf, reg_buf + offset, 4); | |
2608 | return status; | |
2609 | } | |
2610 | ||
2611 | return REG_UNKNOWN; | |
2612 | } | |
2613 | ||
2614 | /* Write for csky pseudo regs. */ | |
2615 | ||
2616 | static void | |
2617 | csky_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache, | |
2618 | int regnum, const gdb_byte *buf) | |
2619 | { | |
2620 | int num_regs = gdbarch_num_regs (gdbarch); | |
2621 | csky_gdbarch_tdep *tdep | |
08106042 | 2622 | = gdbarch_tdep<csky_gdbarch_tdep> (gdbarch); |
e3940312 JL |
2623 | |
2624 | regnum -= num_regs; | |
2625 | ||
2626 | if (regnum < tdep->fv_pseudo_registers_count) | |
2627 | { | |
2628 | gdb_byte reg_buf[16]; | |
2629 | int gdb_regnum = 0; | |
2630 | int offset = 0; | |
2631 | ||
2632 | if (tdep->has_vr0) | |
2633 | { | |
2634 | if (regnum < 64) | |
2635 | { | |
2636 | gdb_regnum = CSKY_VR0_REGNUM + (regnum / 4); | |
2637 | offset = (regnum % 4) * 4; | |
2638 | } | |
2639 | else | |
2640 | { | |
2641 | gdb_regnum = CSKY_FR16_REGNUM + ((regnum - 64) / 4); | |
2642 | if ((regnum % 4) >= 2) | |
2643 | return; | |
2644 | offset = (regnum % 2) * 4; | |
2645 | } | |
2646 | } | |
2647 | else | |
2648 | { | |
2649 | gdb_regnum = CSKY_FR0_REGNUM + (regnum / 4); | |
2650 | if ((regnum % 4) >= 2) | |
2651 | return; | |
2652 | offset = (regnum % 2) * 4; | |
2653 | } | |
2654 | ||
2655 | regcache->raw_read (gdb_regnum, reg_buf); | |
2656 | memcpy (reg_buf + offset, buf, 4); | |
2657 | regcache->raw_write (gdb_regnum, reg_buf); | |
2658 | return; | |
2659 | } | |
2660 | ||
2661 | return; | |
2662 | } | |
2663 | ||
9d24df82 HAQ |
2664 | /* Initialize the current architecture based on INFO. If possible, |
2665 | re-use an architecture from ARCHES, which is a list of | |
2666 | architectures already created during this debugging session. | |
2667 | ||
2668 | Called at program startup, when reading a core file, and when | |
2669 | reading a binary file. */ | |
2670 | ||
2671 | static struct gdbarch * | |
2672 | csky_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) | |
2673 | { | |
2674 | struct gdbarch *gdbarch; | |
68538bbe JL |
2675 | /* Analyze info.abfd. */ |
2676 | unsigned int fpu_abi = 0; | |
2677 | unsigned int vdsp_version = 0; | |
2678 | unsigned int fpu_hardfp = 0; | |
afd53c3c JL |
2679 | /* Analyze info.target_desc */ |
2680 | int num_regs = 0; | |
e3940312 JL |
2681 | int has_fr0 = 0; |
2682 | int has_fr16 = 0; | |
2683 | int has_vr0 = 0; | |
afd53c3c JL |
2684 | tdesc_arch_data_up tdesc_data; |
2685 | ||
2686 | if (tdesc_has_registers (info.target_desc)) | |
2687 | { | |
2688 | int valid_p = 0; | |
2689 | int numbered = 0; | |
2690 | int index = 0; | |
2691 | int i = 0; | |
2692 | int feature_names_count = ARRAY_SIZE (csky_supported_tdesc_feature_names); | |
2693 | int support_tdesc_regs_count | |
2694 | = csky_get_supported_tdesc_registers_count(); | |
2695 | const struct csky_supported_tdesc_register *tdesc_reg; | |
2696 | const struct tdesc_feature *feature; | |
2697 | ||
2698 | tdesc_data = tdesc_data_alloc (); | |
2699 | for (index = 0; index < feature_names_count; index ++) | |
2700 | { | |
2701 | feature = tdesc_find_feature (info.target_desc, | |
2702 | csky_supported_tdesc_feature_names[index]); | |
2703 | if (feature != NULL) | |
2704 | { | |
2705 | for (i = 0; i < support_tdesc_regs_count; i++) | |
2706 | { | |
2707 | tdesc_reg = csky_get_supported_register_by_index (i); | |
2708 | if (!tdesc_reg) | |
2709 | break; | |
2710 | numbered = tdesc_numbered_register (feature, tdesc_data.get(), | |
2711 | tdesc_reg->num, | |
2712 | tdesc_reg->name); | |
2713 | if (numbered) { | |
2714 | valid_p |= csky_essential_reg_check (tdesc_reg); | |
e3940312 JL |
2715 | has_fr0 |= csky_fr0_fr15_reg_check (tdesc_reg); |
2716 | has_fr16 |= csky_fr16_fr31_reg_check (tdesc_reg); | |
2717 | has_vr0 |= csky_vr0_vr15_reg_check (tdesc_reg); | |
afd53c3c JL |
2718 | if (num_regs < tdesc_reg->num) |
2719 | num_regs = tdesc_reg->num; | |
2720 | } | |
2721 | } | |
2722 | } | |
2723 | } | |
2724 | if (valid_p != CSKY_TDESC_REGS_ESSENTIAL_VALUE) | |
2725 | return NULL; | |
2726 | } | |
68538bbe JL |
2727 | |
2728 | /* When the type of bfd file is srec(or any files are not elf), | |
2729 | the E_FLAGS will be not credible. */ | |
2730 | if (info.abfd != NULL && bfd_get_flavour (info.abfd) == bfd_target_elf_flavour) | |
2731 | { | |
2732 | /* Get FPU, VDSP build options. */ | |
2733 | fpu_abi = bfd_elf_get_obj_attr_int (info.abfd, | |
2734 | OBJ_ATTR_PROC, | |
2735 | Tag_CSKY_FPU_ABI); | |
2736 | vdsp_version = bfd_elf_get_obj_attr_int (info.abfd, | |
2737 | OBJ_ATTR_PROC, | |
2738 | Tag_CSKY_VDSP_VERSION); | |
2739 | fpu_hardfp = bfd_elf_get_obj_attr_int (info.abfd, | |
2740 | OBJ_ATTR_PROC, | |
2741 | Tag_CSKY_FPU_HARDFP); | |
2742 | } | |
9d24df82 HAQ |
2743 | |
2744 | /* Find a candidate among the list of pre-declared architectures. */ | |
68538bbe JL |
2745 | for (arches = gdbarch_list_lookup_by_info (arches, &info); |
2746 | arches != NULL; | |
2747 | arches = gdbarch_list_lookup_by_info (arches->next, &info)) | |
2748 | { | |
2749 | csky_gdbarch_tdep *tdep | |
08106042 | 2750 | = gdbarch_tdep<csky_gdbarch_tdep> (arches->gdbarch); |
68538bbe JL |
2751 | if (fpu_abi != tdep->fpu_abi) |
2752 | continue; | |
2753 | if (vdsp_version != tdep->vdsp_version) | |
2754 | continue; | |
2755 | if (fpu_hardfp != tdep->fpu_hardfp) | |
2756 | continue; | |
2757 | ||
2758 | /* Found a match. */ | |
2759 | return arches->gdbarch; | |
2760 | } | |
9d24df82 HAQ |
2761 | |
2762 | /* None found, create a new architecture from the information | |
2763 | provided. */ | |
345bd07c | 2764 | csky_gdbarch_tdep *tdep = new csky_gdbarch_tdep; |
9d24df82 | 2765 | gdbarch = gdbarch_alloc (&info, tdep); |
68538bbe JL |
2766 | tdep->fpu_abi = fpu_abi; |
2767 | tdep->vdsp_version = vdsp_version; | |
2768 | tdep->fpu_hardfp = fpu_hardfp; | |
9d24df82 | 2769 | |
e3940312 JL |
2770 | if (tdesc_data != NULL) |
2771 | { | |
2772 | if ((has_vr0 == CSKY_FULL16_ONEHOT_VALUE) | |
2773 | && (has_fr16 == CSKY_FULL16_ONEHOT_VALUE)) | |
2774 | { | |
2775 | tdep->has_vr0 = 1; | |
2776 | tdep->fv_pseudo_registers_count = 128; | |
2777 | } | |
2778 | else if ((has_vr0 == CSKY_FULL16_ONEHOT_VALUE) | |
2779 | && (has_fr16 != CSKY_FULL16_ONEHOT_VALUE)) | |
2780 | { | |
2781 | tdep->has_vr0 = 1; | |
2782 | tdep->fv_pseudo_registers_count = 64; | |
2783 | } | |
2784 | else if ((has_fr0 == CSKY_FULL16_ONEHOT_VALUE) | |
2785 | && (has_vr0 != CSKY_FULL16_ONEHOT_VALUE)) | |
2786 | { | |
2787 | tdep->has_vr0 = 0; | |
2788 | tdep->fv_pseudo_registers_count = 64; | |
2789 | } | |
2790 | else | |
2791 | { | |
2792 | tdep->has_vr0 = 0; | |
2793 | tdep->fv_pseudo_registers_count = 0; | |
2794 | } | |
2795 | } | |
2796 | else | |
2797 | { | |
2798 | tdep->has_vr0 = 1; | |
2799 | tdep->fv_pseudo_registers_count = 64; | |
2800 | } | |
2801 | ||
9d24df82 HAQ |
2802 | /* Target data types. */ |
2803 | set_gdbarch_ptr_bit (gdbarch, 32); | |
2804 | set_gdbarch_addr_bit (gdbarch, 32); | |
2805 | set_gdbarch_short_bit (gdbarch, 16); | |
2806 | set_gdbarch_int_bit (gdbarch, 32); | |
2807 | set_gdbarch_long_bit (gdbarch, 32); | |
2808 | set_gdbarch_long_long_bit (gdbarch, 64); | |
2809 | set_gdbarch_float_bit (gdbarch, 32); | |
2810 | set_gdbarch_double_bit (gdbarch, 64); | |
2811 | set_gdbarch_float_format (gdbarch, floatformats_ieee_single); | |
2812 | set_gdbarch_double_format (gdbarch, floatformats_ieee_double); | |
2813 | ||
2814 | /* Information about the target architecture. */ | |
2815 | set_gdbarch_return_value (gdbarch, csky_return_value); | |
2816 | set_gdbarch_breakpoint_kind_from_pc (gdbarch, csky_breakpoint_kind_from_pc); | |
2817 | set_gdbarch_sw_breakpoint_from_kind (gdbarch, csky_sw_breakpoint_from_kind); | |
2818 | ||
2819 | /* Register architecture. */ | |
2820 | set_gdbarch_num_regs (gdbarch, CSKY_NUM_REGS); | |
2821 | set_gdbarch_pc_regnum (gdbarch, CSKY_PC_REGNUM); | |
2822 | set_gdbarch_sp_regnum (gdbarch, CSKY_SP_REGNUM); | |
2823 | set_gdbarch_register_name (gdbarch, csky_register_name); | |
2824 | set_gdbarch_register_type (gdbarch, csky_register_type); | |
2825 | set_gdbarch_read_pc (gdbarch, csky_read_pc); | |
2826 | set_gdbarch_write_pc (gdbarch, csky_write_pc); | |
9d24df82 HAQ |
2827 | csky_add_reggroups (gdbarch); |
2828 | set_gdbarch_register_reggroup_p (gdbarch, csky_register_reggroup_p); | |
2829 | set_gdbarch_stab_reg_to_regnum (gdbarch, csky_dwarf_reg_to_regnum); | |
2830 | set_gdbarch_dwarf2_reg_to_regnum (gdbarch, csky_dwarf_reg_to_regnum); | |
2831 | dwarf2_frame_set_init_reg (gdbarch, csky_dwarf2_frame_init_reg); | |
2832 | ||
2833 | /* Functions to analyze frames. */ | |
2834 | frame_base_set_default (gdbarch, &csky_frame_base); | |
2835 | set_gdbarch_skip_prologue (gdbarch, csky_skip_prologue); | |
2836 | set_gdbarch_inner_than (gdbarch, core_addr_lessthan); | |
2837 | set_gdbarch_frame_align (gdbarch, csky_frame_align); | |
2838 | set_gdbarch_stack_frame_destroyed_p (gdbarch, csky_stack_frame_destroyed_p); | |
2839 | ||
9d24df82 HAQ |
2840 | /* Functions handling dummy frames. */ |
2841 | set_gdbarch_push_dummy_call (gdbarch, csky_push_dummy_call); | |
9d24df82 HAQ |
2842 | |
2843 | /* Frame unwinders. Use DWARF debug info if available, | |
2844 | otherwise use our own unwinder. */ | |
2845 | dwarf2_append_unwinders (gdbarch); | |
2846 | frame_unwind_append_unwinder (gdbarch, &csky_stub_unwind); | |
2847 | frame_unwind_append_unwinder (gdbarch, &csky_unwind_cache); | |
2848 | ||
9d24df82 HAQ |
2849 | /* Hook in ABI-specific overrides, if they have been registered. */ |
2850 | gdbarch_init_osabi (info, gdbarch); | |
2851 | ||
2852 | /* Support simple overlay manager. */ | |
2853 | set_gdbarch_overlay_update (gdbarch, simple_overlay_update); | |
2854 | set_gdbarch_char_signed (gdbarch, 0); | |
afd53c3c JL |
2855 | |
2856 | if (tdesc_data != nullptr) | |
2857 | { | |
2858 | set_gdbarch_num_regs (gdbarch, (num_regs + 1)); | |
2859 | tdesc_use_registers (gdbarch, info.target_desc, std::move (tdesc_data)); | |
2860 | set_gdbarch_register_type (gdbarch, csky_register_type); | |
4686f810 JL |
2861 | set_gdbarch_register_reggroup_p (gdbarch, |
2862 | csky_register_reggroup_p); | |
afd53c3c JL |
2863 | } |
2864 | ||
e3940312 JL |
2865 | if (tdep->fv_pseudo_registers_count) |
2866 | { | |
2867 | set_gdbarch_num_pseudo_regs (gdbarch, | |
2868 | tdep->fv_pseudo_registers_count); | |
2869 | set_gdbarch_pseudo_register_read (gdbarch, | |
2870 | csky_pseudo_register_read); | |
2871 | set_gdbarch_pseudo_register_write (gdbarch, | |
2872 | csky_pseudo_register_write); | |
2873 | set_tdesc_pseudo_register_name (gdbarch, csky_pseudo_register_name); | |
2874 | } | |
2875 | ||
9d24df82 HAQ |
2876 | return gdbarch; |
2877 | } | |
2878 | ||
6c265988 | 2879 | void _initialize_csky_tdep (); |
9d24df82 | 2880 | void |
6c265988 | 2881 | _initialize_csky_tdep () |
9d24df82 HAQ |
2882 | { |
2883 | ||
ec29a63c | 2884 | gdbarch_register (bfd_arch_csky, csky_gdbarch_init); |
9d24df82 HAQ |
2885 | |
2886 | csky_init_reggroup (); | |
2887 | ||
2888 | /* Allow debugging this file's internals. */ | |
2889 | add_setshow_boolean_cmd ("csky", class_maintenance, &csky_debug, | |
2890 | _("Set C-Sky debugging."), | |
2891 | _("Show C-Sky debugging."), | |
2892 | _("When on, C-Sky specific debugging is enabled."), | |
2893 | NULL, | |
2894 | NULL, | |
2895 | &setdebuglist, &showdebuglist); | |
2896 | } |