Commit | Line | Data |
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c906108c | 1 | /* Target-dependent code for GDB, the GNU debugger. |
7aea86e6 | 2 | |
6aba47ca DJ |
3 | Copyright (C) 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997, |
4 | 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 | |
721d14ba | 5 | Free Software Foundation, Inc. |
c906108c | 6 | |
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
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 2 of the License, or | |
12 | (at your option) any later version. | |
c906108c | 13 | |
c5aa993b JM |
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. | |
c906108c | 18 | |
c5aa993b JM |
19 | You should have received a copy of the GNU General Public License |
20 | along with this program; if not, write to the Free Software | |
197e01b6 EZ |
21 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
22 | Boston, MA 02110-1301, USA. */ | |
c906108c SS |
23 | |
24 | #include "defs.h" | |
25 | #include "frame.h" | |
26 | #include "inferior.h" | |
27 | #include "symtab.h" | |
28 | #include "target.h" | |
29 | #include "gdbcore.h" | |
30 | #include "gdbcmd.h" | |
c906108c | 31 | #include "objfiles.h" |
7a78ae4e | 32 | #include "arch-utils.h" |
4e052eda | 33 | #include "regcache.h" |
d195bc9f | 34 | #include "regset.h" |
d16aafd8 | 35 | #include "doublest.h" |
fd0407d6 | 36 | #include "value.h" |
1fcc0bb8 | 37 | #include "parser-defs.h" |
4be87837 | 38 | #include "osabi.h" |
7d9b040b | 39 | #include "infcall.h" |
9f643768 JB |
40 | #include "sim-regno.h" |
41 | #include "gdb/sim-ppc.h" | |
6ced10dd | 42 | #include "reggroups.h" |
7a78ae4e | 43 | |
2fccf04a | 44 | #include "libbfd.h" /* for bfd_default_set_arch_mach */ |
7a78ae4e | 45 | #include "coff/internal.h" /* for libcoff.h */ |
2fccf04a | 46 | #include "libcoff.h" /* for xcoff_data */ |
11ed25ac KB |
47 | #include "coff/xcoff.h" |
48 | #include "libxcoff.h" | |
7a78ae4e | 49 | |
9aa1e687 | 50 | #include "elf-bfd.h" |
7a78ae4e | 51 | |
6ded7999 | 52 | #include "solib-svr4.h" |
9aa1e687 | 53 | #include "ppc-tdep.h" |
7a78ae4e | 54 | |
338ef23d | 55 | #include "gdb_assert.h" |
a89aa300 | 56 | #include "dis-asm.h" |
338ef23d | 57 | |
61a65099 KB |
58 | #include "trad-frame.h" |
59 | #include "frame-unwind.h" | |
60 | #include "frame-base.h" | |
61 | ||
1f82754b | 62 | #include "rs6000-tdep.h" |
c44ca51c | 63 | |
7a78ae4e ND |
64 | /* If the kernel has to deliver a signal, it pushes a sigcontext |
65 | structure on the stack and then calls the signal handler, passing | |
66 | the address of the sigcontext in an argument register. Usually | |
67 | the signal handler doesn't save this register, so we have to | |
68 | access the sigcontext structure via an offset from the signal handler | |
69 | frame. | |
70 | The following constants were determined by experimentation on AIX 3.2. */ | |
71 | #define SIG_FRAME_PC_OFFSET 96 | |
72 | #define SIG_FRAME_LR_OFFSET 108 | |
73 | #define SIG_FRAME_FP_OFFSET 284 | |
74 | ||
7a78ae4e ND |
75 | /* To be used by skip_prologue. */ |
76 | ||
77 | struct rs6000_framedata | |
78 | { | |
79 | int offset; /* total size of frame --- the distance | |
80 | by which we decrement sp to allocate | |
81 | the frame */ | |
82 | int saved_gpr; /* smallest # of saved gpr */ | |
83 | int saved_fpr; /* smallest # of saved fpr */ | |
6be8bc0c | 84 | int saved_vr; /* smallest # of saved vr */ |
96ff0de4 | 85 | int saved_ev; /* smallest # of saved ev */ |
7a78ae4e ND |
86 | int alloca_reg; /* alloca register number (frame ptr) */ |
87 | char frameless; /* true if frameless functions. */ | |
88 | char nosavedpc; /* true if pc not saved. */ | |
89 | int gpr_offset; /* offset of saved gprs from prev sp */ | |
90 | int fpr_offset; /* offset of saved fprs from prev sp */ | |
6be8bc0c | 91 | int vr_offset; /* offset of saved vrs from prev sp */ |
96ff0de4 | 92 | int ev_offset; /* offset of saved evs from prev sp */ |
7a78ae4e ND |
93 | int lr_offset; /* offset of saved lr */ |
94 | int cr_offset; /* offset of saved cr */ | |
6be8bc0c | 95 | int vrsave_offset; /* offset of saved vrsave register */ |
7a78ae4e ND |
96 | }; |
97 | ||
98 | /* Description of a single register. */ | |
99 | ||
100 | struct reg | |
101 | { | |
102 | char *name; /* name of register */ | |
0bcc32ae JB |
103 | unsigned char sz32; /* size on 32-bit arch, 0 if nonexistent */ |
104 | unsigned char sz64; /* size on 64-bit arch, 0 if nonexistent */ | |
7a78ae4e | 105 | unsigned char fpr; /* whether register is floating-point */ |
489461e2 | 106 | unsigned char pseudo; /* whether register is pseudo */ |
13ac140c JB |
107 | int spr_num; /* PowerPC SPR number, or -1 if not an SPR. |
108 | This is an ISA SPR number, not a GDB | |
109 | register number. */ | |
7a78ae4e ND |
110 | }; |
111 | ||
c906108c SS |
112 | /* Hook for determining the TOC address when calling functions in the |
113 | inferior under AIX. The initialization code in rs6000-nat.c sets | |
114 | this hook to point to find_toc_address. */ | |
115 | ||
7a78ae4e ND |
116 | CORE_ADDR (*rs6000_find_toc_address_hook) (CORE_ADDR) = NULL; |
117 | ||
c906108c SS |
118 | /* Static function prototypes */ |
119 | ||
a14ed312 KB |
120 | static CORE_ADDR branch_dest (int opcode, int instr, CORE_ADDR pc, |
121 | CORE_ADDR safety); | |
077276e8 KB |
122 | static CORE_ADDR skip_prologue (CORE_ADDR, CORE_ADDR, |
123 | struct rs6000_framedata *); | |
c906108c | 124 | |
64b84175 KB |
125 | /* Is REGNO an AltiVec register? Return 1 if so, 0 otherwise. */ |
126 | int | |
127 | altivec_register_p (int regno) | |
128 | { | |
129 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); | |
130 | if (tdep->ppc_vr0_regnum < 0 || tdep->ppc_vrsave_regnum < 0) | |
131 | return 0; | |
132 | else | |
133 | return (regno >= tdep->ppc_vr0_regnum && regno <= tdep->ppc_vrsave_regnum); | |
134 | } | |
135 | ||
383f0f5b | 136 | |
867e2dc5 JB |
137 | /* Return true if REGNO is an SPE register, false otherwise. */ |
138 | int | |
139 | spe_register_p (int regno) | |
140 | { | |
141 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); | |
142 | ||
143 | /* Is it a reference to EV0 -- EV31, and do we have those? */ | |
144 | if (tdep->ppc_ev0_regnum >= 0 | |
145 | && tdep->ppc_ev31_regnum >= 0 | |
146 | && tdep->ppc_ev0_regnum <= regno && regno <= tdep->ppc_ev31_regnum) | |
147 | return 1; | |
148 | ||
6ced10dd JB |
149 | /* Is it a reference to one of the raw upper GPR halves? */ |
150 | if (tdep->ppc_ev0_upper_regnum >= 0 | |
151 | && tdep->ppc_ev0_upper_regnum <= regno | |
152 | && regno < tdep->ppc_ev0_upper_regnum + ppc_num_gprs) | |
153 | return 1; | |
154 | ||
867e2dc5 JB |
155 | /* Is it a reference to the 64-bit accumulator, and do we have that? */ |
156 | if (tdep->ppc_acc_regnum >= 0 | |
157 | && tdep->ppc_acc_regnum == regno) | |
158 | return 1; | |
159 | ||
160 | /* Is it a reference to the SPE floating-point status and control register, | |
161 | and do we have that? */ | |
162 | if (tdep->ppc_spefscr_regnum >= 0 | |
163 | && tdep->ppc_spefscr_regnum == regno) | |
164 | return 1; | |
165 | ||
166 | return 0; | |
167 | } | |
168 | ||
169 | ||
383f0f5b JB |
170 | /* Return non-zero if the architecture described by GDBARCH has |
171 | floating-point registers (f0 --- f31 and fpscr). */ | |
0a613259 AC |
172 | int |
173 | ppc_floating_point_unit_p (struct gdbarch *gdbarch) | |
174 | { | |
383f0f5b JB |
175 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
176 | ||
177 | return (tdep->ppc_fp0_regnum >= 0 | |
178 | && tdep->ppc_fpscr_regnum >= 0); | |
0a613259 | 179 | } |
9f643768 | 180 | |
09991fa0 JB |
181 | |
182 | /* Check that TABLE[GDB_REGNO] is not already initialized, and then | |
183 | set it to SIM_REGNO. | |
184 | ||
185 | This is a helper function for init_sim_regno_table, constructing | |
186 | the table mapping GDB register numbers to sim register numbers; we | |
187 | initialize every element in that table to -1 before we start | |
188 | filling it in. */ | |
9f643768 JB |
189 | static void |
190 | set_sim_regno (int *table, int gdb_regno, int sim_regno) | |
191 | { | |
192 | /* Make sure we don't try to assign any given GDB register a sim | |
193 | register number more than once. */ | |
194 | gdb_assert (table[gdb_regno] == -1); | |
195 | table[gdb_regno] = sim_regno; | |
196 | } | |
197 | ||
09991fa0 JB |
198 | |
199 | /* Initialize ARCH->tdep->sim_regno, the table mapping GDB register | |
200 | numbers to simulator register numbers, based on the values placed | |
201 | in the ARCH->tdep->ppc_foo_regnum members. */ | |
9f643768 JB |
202 | static void |
203 | init_sim_regno_table (struct gdbarch *arch) | |
204 | { | |
205 | struct gdbarch_tdep *tdep = gdbarch_tdep (arch); | |
206 | int total_regs = gdbarch_num_regs (arch) + gdbarch_num_pseudo_regs (arch); | |
207 | const struct reg *regs = tdep->regs; | |
208 | int *sim_regno = GDBARCH_OBSTACK_CALLOC (arch, total_regs, int); | |
209 | int i; | |
210 | ||
211 | /* Presume that all registers not explicitly mentioned below are | |
212 | unavailable from the sim. */ | |
213 | for (i = 0; i < total_regs; i++) | |
214 | sim_regno[i] = -1; | |
215 | ||
216 | /* General-purpose registers. */ | |
217 | for (i = 0; i < ppc_num_gprs; i++) | |
218 | set_sim_regno (sim_regno, tdep->ppc_gp0_regnum + i, sim_ppc_r0_regnum + i); | |
219 | ||
220 | /* Floating-point registers. */ | |
221 | if (tdep->ppc_fp0_regnum >= 0) | |
222 | for (i = 0; i < ppc_num_fprs; i++) | |
223 | set_sim_regno (sim_regno, | |
224 | tdep->ppc_fp0_regnum + i, | |
225 | sim_ppc_f0_regnum + i); | |
226 | if (tdep->ppc_fpscr_regnum >= 0) | |
227 | set_sim_regno (sim_regno, tdep->ppc_fpscr_regnum, sim_ppc_fpscr_regnum); | |
228 | ||
229 | set_sim_regno (sim_regno, gdbarch_pc_regnum (arch), sim_ppc_pc_regnum); | |
230 | set_sim_regno (sim_regno, tdep->ppc_ps_regnum, sim_ppc_ps_regnum); | |
231 | set_sim_regno (sim_regno, tdep->ppc_cr_regnum, sim_ppc_cr_regnum); | |
232 | ||
233 | /* Segment registers. */ | |
234 | if (tdep->ppc_sr0_regnum >= 0) | |
235 | for (i = 0; i < ppc_num_srs; i++) | |
236 | set_sim_regno (sim_regno, | |
237 | tdep->ppc_sr0_regnum + i, | |
238 | sim_ppc_sr0_regnum + i); | |
239 | ||
240 | /* Altivec registers. */ | |
241 | if (tdep->ppc_vr0_regnum >= 0) | |
242 | { | |
243 | for (i = 0; i < ppc_num_vrs; i++) | |
244 | set_sim_regno (sim_regno, | |
245 | tdep->ppc_vr0_regnum + i, | |
246 | sim_ppc_vr0_regnum + i); | |
247 | ||
248 | /* FIXME: jimb/2004-07-15: when we have tdep->ppc_vscr_regnum, | |
249 | we can treat this more like the other cases. */ | |
250 | set_sim_regno (sim_regno, | |
251 | tdep->ppc_vr0_regnum + ppc_num_vrs, | |
252 | sim_ppc_vscr_regnum); | |
253 | } | |
254 | /* vsave is a special-purpose register, so the code below handles it. */ | |
255 | ||
256 | /* SPE APU (E500) registers. */ | |
257 | if (tdep->ppc_ev0_regnum >= 0) | |
258 | for (i = 0; i < ppc_num_gprs; i++) | |
259 | set_sim_regno (sim_regno, | |
260 | tdep->ppc_ev0_regnum + i, | |
261 | sim_ppc_ev0_regnum + i); | |
6ced10dd JB |
262 | if (tdep->ppc_ev0_upper_regnum >= 0) |
263 | for (i = 0; i < ppc_num_gprs; i++) | |
264 | set_sim_regno (sim_regno, | |
265 | tdep->ppc_ev0_upper_regnum + i, | |
266 | sim_ppc_rh0_regnum + i); | |
9f643768 JB |
267 | if (tdep->ppc_acc_regnum >= 0) |
268 | set_sim_regno (sim_regno, tdep->ppc_acc_regnum, sim_ppc_acc_regnum); | |
269 | /* spefscr is a special-purpose register, so the code below handles it. */ | |
270 | ||
271 | /* Now handle all special-purpose registers. Verify that they | |
272 | haven't mistakenly been assigned numbers by any of the above | |
273 | code). */ | |
274 | for (i = 0; i < total_regs; i++) | |
275 | if (regs[i].spr_num >= 0) | |
276 | set_sim_regno (sim_regno, i, regs[i].spr_num + sim_ppc_spr0_regnum); | |
277 | ||
278 | /* Drop the initialized array into place. */ | |
279 | tdep->sim_regno = sim_regno; | |
280 | } | |
281 | ||
09991fa0 JB |
282 | |
283 | /* Given a GDB register number REG, return the corresponding SIM | |
284 | register number. */ | |
9f643768 JB |
285 | static int |
286 | rs6000_register_sim_regno (int reg) | |
287 | { | |
288 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); | |
289 | int sim_regno; | |
290 | ||
291 | gdb_assert (0 <= reg && reg <= NUM_REGS + NUM_PSEUDO_REGS); | |
292 | sim_regno = tdep->sim_regno[reg]; | |
293 | ||
294 | if (sim_regno >= 0) | |
295 | return sim_regno; | |
296 | else | |
297 | return LEGACY_SIM_REGNO_IGNORE; | |
298 | } | |
299 | ||
d195bc9f MK |
300 | \f |
301 | ||
302 | /* Register set support functions. */ | |
303 | ||
304 | static void | |
305 | ppc_supply_reg (struct regcache *regcache, int regnum, | |
50fd1280 | 306 | const gdb_byte *regs, size_t offset) |
d195bc9f MK |
307 | { |
308 | if (regnum != -1 && offset != -1) | |
309 | regcache_raw_supply (regcache, regnum, regs + offset); | |
310 | } | |
311 | ||
312 | static void | |
313 | ppc_collect_reg (const struct regcache *regcache, int regnum, | |
50fd1280 | 314 | gdb_byte *regs, size_t offset) |
d195bc9f MK |
315 | { |
316 | if (regnum != -1 && offset != -1) | |
317 | regcache_raw_collect (regcache, regnum, regs + offset); | |
318 | } | |
319 | ||
320 | /* Supply register REGNUM in the general-purpose register set REGSET | |
321 | from the buffer specified by GREGS and LEN to register cache | |
322 | REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ | |
323 | ||
324 | void | |
325 | ppc_supply_gregset (const struct regset *regset, struct regcache *regcache, | |
326 | int regnum, const void *gregs, size_t len) | |
327 | { | |
328 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
329 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
330 | const struct ppc_reg_offsets *offsets = regset->descr; | |
331 | size_t offset; | |
332 | int i; | |
333 | ||
cdf2c5f5 | 334 | for (i = tdep->ppc_gp0_regnum, offset = offsets->r0_offset; |
063715bf | 335 | i < tdep->ppc_gp0_regnum + ppc_num_gprs; |
cdf2c5f5 | 336 | i++, offset += 4) |
d195bc9f MK |
337 | { |
338 | if (regnum == -1 || regnum == i) | |
339 | ppc_supply_reg (regcache, i, gregs, offset); | |
340 | } | |
341 | ||
342 | if (regnum == -1 || regnum == PC_REGNUM) | |
343 | ppc_supply_reg (regcache, PC_REGNUM, gregs, offsets->pc_offset); | |
344 | if (regnum == -1 || regnum == tdep->ppc_ps_regnum) | |
345 | ppc_supply_reg (regcache, tdep->ppc_ps_regnum, | |
346 | gregs, offsets->ps_offset); | |
347 | if (regnum == -1 || regnum == tdep->ppc_cr_regnum) | |
348 | ppc_supply_reg (regcache, tdep->ppc_cr_regnum, | |
349 | gregs, offsets->cr_offset); | |
350 | if (regnum == -1 || regnum == tdep->ppc_lr_regnum) | |
351 | ppc_supply_reg (regcache, tdep->ppc_lr_regnum, | |
352 | gregs, offsets->lr_offset); | |
353 | if (regnum == -1 || regnum == tdep->ppc_ctr_regnum) | |
354 | ppc_supply_reg (regcache, tdep->ppc_ctr_regnum, | |
355 | gregs, offsets->ctr_offset); | |
356 | if (regnum == -1 || regnum == tdep->ppc_xer_regnum) | |
357 | ppc_supply_reg (regcache, tdep->ppc_xer_regnum, | |
358 | gregs, offsets->cr_offset); | |
359 | if (regnum == -1 || regnum == tdep->ppc_mq_regnum) | |
360 | ppc_supply_reg (regcache, tdep->ppc_mq_regnum, gregs, offsets->mq_offset); | |
361 | } | |
362 | ||
363 | /* Supply register REGNUM in the floating-point register set REGSET | |
364 | from the buffer specified by FPREGS and LEN to register cache | |
365 | REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ | |
366 | ||
367 | void | |
368 | ppc_supply_fpregset (const struct regset *regset, struct regcache *regcache, | |
369 | int regnum, const void *fpregs, size_t len) | |
370 | { | |
371 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
372 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
373 | const struct ppc_reg_offsets *offsets = regset->descr; | |
374 | size_t offset; | |
375 | int i; | |
376 | ||
383f0f5b JB |
377 | gdb_assert (ppc_floating_point_unit_p (gdbarch)); |
378 | ||
d195bc9f | 379 | offset = offsets->f0_offset; |
366f009f JB |
380 | for (i = tdep->ppc_fp0_regnum; |
381 | i < tdep->ppc_fp0_regnum + ppc_num_fprs; | |
bdbcb8b4 | 382 | i++, offset += 8) |
d195bc9f MK |
383 | { |
384 | if (regnum == -1 || regnum == i) | |
385 | ppc_supply_reg (regcache, i, fpregs, offset); | |
386 | } | |
387 | ||
388 | if (regnum == -1 || regnum == tdep->ppc_fpscr_regnum) | |
389 | ppc_supply_reg (regcache, tdep->ppc_fpscr_regnum, | |
390 | fpregs, offsets->fpscr_offset); | |
391 | } | |
392 | ||
393 | /* Collect register REGNUM in the general-purpose register set | |
394 | REGSET. from register cache REGCACHE into the buffer specified by | |
395 | GREGS and LEN. If REGNUM is -1, do this for all registers in | |
396 | REGSET. */ | |
397 | ||
398 | void | |
399 | ppc_collect_gregset (const struct regset *regset, | |
400 | const struct regcache *regcache, | |
401 | int regnum, void *gregs, size_t len) | |
402 | { | |
403 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
404 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
405 | const struct ppc_reg_offsets *offsets = regset->descr; | |
406 | size_t offset; | |
407 | int i; | |
408 | ||
409 | offset = offsets->r0_offset; | |
cdf2c5f5 | 410 | for (i = tdep->ppc_gp0_regnum; |
063715bf | 411 | i < tdep->ppc_gp0_regnum + ppc_num_gprs; |
cdf2c5f5 | 412 | i++, offset += 4) |
d195bc9f MK |
413 | { |
414 | if (regnum == -1 || regnum == i) | |
2e56e9c1 | 415 | ppc_collect_reg (regcache, i, gregs, offset); |
d195bc9f MK |
416 | } |
417 | ||
418 | if (regnum == -1 || regnum == PC_REGNUM) | |
419 | ppc_collect_reg (regcache, PC_REGNUM, gregs, offsets->pc_offset); | |
420 | if (regnum == -1 || regnum == tdep->ppc_ps_regnum) | |
421 | ppc_collect_reg (regcache, tdep->ppc_ps_regnum, | |
422 | gregs, offsets->ps_offset); | |
423 | if (regnum == -1 || regnum == tdep->ppc_cr_regnum) | |
424 | ppc_collect_reg (regcache, tdep->ppc_cr_regnum, | |
425 | gregs, offsets->cr_offset); | |
426 | if (regnum == -1 || regnum == tdep->ppc_lr_regnum) | |
427 | ppc_collect_reg (regcache, tdep->ppc_lr_regnum, | |
428 | gregs, offsets->lr_offset); | |
429 | if (regnum == -1 || regnum == tdep->ppc_ctr_regnum) | |
430 | ppc_collect_reg (regcache, tdep->ppc_ctr_regnum, | |
431 | gregs, offsets->ctr_offset); | |
432 | if (regnum == -1 || regnum == tdep->ppc_xer_regnum) | |
433 | ppc_collect_reg (regcache, tdep->ppc_xer_regnum, | |
434 | gregs, offsets->xer_offset); | |
435 | if (regnum == -1 || regnum == tdep->ppc_mq_regnum) | |
436 | ppc_collect_reg (regcache, tdep->ppc_mq_regnum, | |
437 | gregs, offsets->mq_offset); | |
438 | } | |
439 | ||
440 | /* Collect register REGNUM in the floating-point register set | |
441 | REGSET. from register cache REGCACHE into the buffer specified by | |
442 | FPREGS and LEN. If REGNUM is -1, do this for all registers in | |
443 | REGSET. */ | |
444 | ||
445 | void | |
446 | ppc_collect_fpregset (const struct regset *regset, | |
447 | const struct regcache *regcache, | |
448 | int regnum, void *fpregs, size_t len) | |
449 | { | |
450 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
451 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
452 | const struct ppc_reg_offsets *offsets = regset->descr; | |
453 | size_t offset; | |
454 | int i; | |
455 | ||
383f0f5b JB |
456 | gdb_assert (ppc_floating_point_unit_p (gdbarch)); |
457 | ||
d195bc9f | 458 | offset = offsets->f0_offset; |
366f009f JB |
459 | for (i = tdep->ppc_fp0_regnum; |
460 | i <= tdep->ppc_fp0_regnum + ppc_num_fprs; | |
bdbcb8b4 | 461 | i++, offset += 8) |
d195bc9f MK |
462 | { |
463 | if (regnum == -1 || regnum == i) | |
bdbcb8b4 | 464 | ppc_collect_reg (regcache, i, fpregs, offset); |
d195bc9f MK |
465 | } |
466 | ||
467 | if (regnum == -1 || regnum == tdep->ppc_fpscr_regnum) | |
468 | ppc_collect_reg (regcache, tdep->ppc_fpscr_regnum, | |
469 | fpregs, offsets->fpscr_offset); | |
470 | } | |
471 | \f | |
0a613259 | 472 | |
7a78ae4e | 473 | /* Read a LEN-byte address from debugged memory address MEMADDR. */ |
c906108c | 474 | |
7a78ae4e ND |
475 | static CORE_ADDR |
476 | read_memory_addr (CORE_ADDR memaddr, int len) | |
477 | { | |
478 | return read_memory_unsigned_integer (memaddr, len); | |
479 | } | |
c906108c | 480 | |
7a78ae4e ND |
481 | static CORE_ADDR |
482 | rs6000_skip_prologue (CORE_ADDR pc) | |
b83266a0 SS |
483 | { |
484 | struct rs6000_framedata frame; | |
4e463ff5 DJ |
485 | CORE_ADDR limit_pc, func_addr; |
486 | ||
487 | /* See if we can determine the end of the prologue via the symbol table. | |
488 | If so, then return either PC, or the PC after the prologue, whichever | |
489 | is greater. */ | |
490 | if (find_pc_partial_function (pc, NULL, &func_addr, NULL)) | |
491 | { | |
492 | CORE_ADDR post_prologue_pc = skip_prologue_using_sal (func_addr); | |
493 | if (post_prologue_pc != 0) | |
494 | return max (pc, post_prologue_pc); | |
495 | } | |
496 | ||
497 | /* Can't determine prologue from the symbol table, need to examine | |
498 | instructions. */ | |
499 | ||
500 | /* Find an upper limit on the function prologue using the debug | |
501 | information. If the debug information could not be used to provide | |
502 | that bound, then use an arbitrary large number as the upper bound. */ | |
503 | limit_pc = skip_prologue_using_sal (pc); | |
504 | if (limit_pc == 0) | |
505 | limit_pc = pc + 100; /* Magic. */ | |
506 | ||
507 | pc = skip_prologue (pc, limit_pc, &frame); | |
b83266a0 SS |
508 | return pc; |
509 | } | |
510 | ||
0d1243d9 PG |
511 | static int |
512 | insn_changes_sp_or_jumps (unsigned long insn) | |
513 | { | |
514 | int opcode = (insn >> 26) & 0x03f; | |
515 | int sd = (insn >> 21) & 0x01f; | |
516 | int a = (insn >> 16) & 0x01f; | |
517 | int subcode = (insn >> 1) & 0x3ff; | |
518 | ||
519 | /* Changes the stack pointer. */ | |
520 | ||
521 | /* NOTE: There are many ways to change the value of a given register. | |
522 | The ways below are those used when the register is R1, the SP, | |
523 | in a funtion's epilogue. */ | |
524 | ||
525 | if (opcode == 31 && subcode == 444 && a == 1) | |
526 | return 1; /* mr R1,Rn */ | |
527 | if (opcode == 14 && sd == 1) | |
528 | return 1; /* addi R1,Rn,simm */ | |
529 | if (opcode == 58 && sd == 1) | |
530 | return 1; /* ld R1,ds(Rn) */ | |
531 | ||
532 | /* Transfers control. */ | |
533 | ||
534 | if (opcode == 18) | |
535 | return 1; /* b */ | |
536 | if (opcode == 16) | |
537 | return 1; /* bc */ | |
538 | if (opcode == 19 && subcode == 16) | |
539 | return 1; /* bclr */ | |
540 | if (opcode == 19 && subcode == 528) | |
541 | return 1; /* bcctr */ | |
542 | ||
543 | return 0; | |
544 | } | |
545 | ||
546 | /* Return true if we are in the function's epilogue, i.e. after the | |
547 | instruction that destroyed the function's stack frame. | |
548 | ||
549 | 1) scan forward from the point of execution: | |
550 | a) If you find an instruction that modifies the stack pointer | |
551 | or transfers control (except a return), execution is not in | |
552 | an epilogue, return. | |
553 | b) Stop scanning if you find a return instruction or reach the | |
554 | end of the function or reach the hard limit for the size of | |
555 | an epilogue. | |
556 | 2) scan backward from the point of execution: | |
557 | a) If you find an instruction that modifies the stack pointer, | |
558 | execution *is* in an epilogue, return. | |
559 | b) Stop scanning if you reach an instruction that transfers | |
560 | control or the beginning of the function or reach the hard | |
561 | limit for the size of an epilogue. */ | |
562 | ||
563 | static int | |
564 | rs6000_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) | |
565 | { | |
566 | bfd_byte insn_buf[PPC_INSN_SIZE]; | |
567 | CORE_ADDR scan_pc, func_start, func_end, epilogue_start, epilogue_end; | |
568 | unsigned long insn; | |
569 | struct frame_info *curfrm; | |
570 | ||
571 | /* Find the search limits based on function boundaries and hard limit. */ | |
572 | ||
573 | if (!find_pc_partial_function (pc, NULL, &func_start, &func_end)) | |
574 | return 0; | |
575 | ||
576 | epilogue_start = pc - PPC_MAX_EPILOGUE_INSTRUCTIONS * PPC_INSN_SIZE; | |
577 | if (epilogue_start < func_start) epilogue_start = func_start; | |
578 | ||
579 | epilogue_end = pc + PPC_MAX_EPILOGUE_INSTRUCTIONS * PPC_INSN_SIZE; | |
580 | if (epilogue_end > func_end) epilogue_end = func_end; | |
581 | ||
582 | curfrm = get_current_frame (); | |
583 | ||
584 | /* Scan forward until next 'blr'. */ | |
585 | ||
586 | for (scan_pc = pc; scan_pc < epilogue_end; scan_pc += PPC_INSN_SIZE) | |
587 | { | |
588 | if (!safe_frame_unwind_memory (curfrm, scan_pc, insn_buf, PPC_INSN_SIZE)) | |
589 | return 0; | |
4e463ff5 | 590 | insn = extract_unsigned_integer (insn_buf, PPC_INSN_SIZE); |
0d1243d9 PG |
591 | if (insn == 0x4e800020) |
592 | break; | |
593 | if (insn_changes_sp_or_jumps (insn)) | |
594 | return 0; | |
595 | } | |
596 | ||
597 | /* Scan backward until adjustment to stack pointer (R1). */ | |
598 | ||
599 | for (scan_pc = pc - PPC_INSN_SIZE; | |
600 | scan_pc >= epilogue_start; | |
601 | scan_pc -= PPC_INSN_SIZE) | |
602 | { | |
603 | if (!safe_frame_unwind_memory (curfrm, scan_pc, insn_buf, PPC_INSN_SIZE)) | |
604 | return 0; | |
4e463ff5 | 605 | insn = extract_unsigned_integer (insn_buf, PPC_INSN_SIZE); |
0d1243d9 PG |
606 | if (insn_changes_sp_or_jumps (insn)) |
607 | return 1; | |
608 | } | |
609 | ||
610 | return 0; | |
611 | } | |
612 | ||
b83266a0 | 613 | |
c906108c SS |
614 | /* Fill in fi->saved_regs */ |
615 | ||
616 | struct frame_extra_info | |
617 | { | |
618 | /* Functions calling alloca() change the value of the stack | |
619 | pointer. We need to use initial stack pointer (which is saved in | |
620 | r31 by gcc) in such cases. If a compiler emits traceback table, | |
621 | then we should use the alloca register specified in traceback | |
622 | table. FIXME. */ | |
c5aa993b | 623 | CORE_ADDR initial_sp; /* initial stack pointer. */ |
c906108c SS |
624 | }; |
625 | ||
143985b7 | 626 | /* Get the ith function argument for the current function. */ |
b9362cc7 | 627 | static CORE_ADDR |
143985b7 AF |
628 | rs6000_fetch_pointer_argument (struct frame_info *frame, int argi, |
629 | struct type *type) | |
630 | { | |
50fd1280 | 631 | return get_frame_register_unsigned (frame, 3 + argi); |
143985b7 AF |
632 | } |
633 | ||
c906108c SS |
634 | /* Calculate the destination of a branch/jump. Return -1 if not a branch. */ |
635 | ||
636 | static CORE_ADDR | |
7a78ae4e | 637 | branch_dest (int opcode, int instr, CORE_ADDR pc, CORE_ADDR safety) |
c906108c SS |
638 | { |
639 | CORE_ADDR dest; | |
640 | int immediate; | |
641 | int absolute; | |
642 | int ext_op; | |
643 | ||
644 | absolute = (int) ((instr >> 1) & 1); | |
645 | ||
c5aa993b JM |
646 | switch (opcode) |
647 | { | |
648 | case 18: | |
649 | immediate = ((instr & ~3) << 6) >> 6; /* br unconditional */ | |
650 | if (absolute) | |
651 | dest = immediate; | |
652 | else | |
653 | dest = pc + immediate; | |
654 | break; | |
655 | ||
656 | case 16: | |
657 | immediate = ((instr & ~3) << 16) >> 16; /* br conditional */ | |
658 | if (absolute) | |
659 | dest = immediate; | |
660 | else | |
661 | dest = pc + immediate; | |
662 | break; | |
663 | ||
664 | case 19: | |
665 | ext_op = (instr >> 1) & 0x3ff; | |
666 | ||
667 | if (ext_op == 16) /* br conditional register */ | |
668 | { | |
2188cbdd | 669 | dest = read_register (gdbarch_tdep (current_gdbarch)->ppc_lr_regnum) & ~3; |
c5aa993b JM |
670 | |
671 | /* If we are about to return from a signal handler, dest is | |
672 | something like 0x3c90. The current frame is a signal handler | |
673 | caller frame, upon completion of the sigreturn system call | |
674 | execution will return to the saved PC in the frame. */ | |
6f7f3f0d | 675 | if (dest < gdbarch_tdep (current_gdbarch)->text_segment_base) |
c5aa993b JM |
676 | { |
677 | struct frame_info *fi; | |
678 | ||
679 | fi = get_current_frame (); | |
680 | if (fi != NULL) | |
8b36eed8 | 681 | dest = read_memory_addr (get_frame_base (fi) + SIG_FRAME_PC_OFFSET, |
21283beb | 682 | gdbarch_tdep (current_gdbarch)->wordsize); |
c5aa993b JM |
683 | } |
684 | } | |
685 | ||
686 | else if (ext_op == 528) /* br cond to count reg */ | |
687 | { | |
2188cbdd | 688 | dest = read_register (gdbarch_tdep (current_gdbarch)->ppc_ctr_regnum) & ~3; |
c5aa993b JM |
689 | |
690 | /* If we are about to execute a system call, dest is something | |
691 | like 0x22fc or 0x3b00. Upon completion the system call | |
692 | will return to the address in the link register. */ | |
6f7f3f0d | 693 | if (dest < gdbarch_tdep (current_gdbarch)->text_segment_base) |
2188cbdd | 694 | dest = read_register (gdbarch_tdep (current_gdbarch)->ppc_lr_regnum) & ~3; |
c5aa993b JM |
695 | } |
696 | else | |
697 | return -1; | |
698 | break; | |
c906108c | 699 | |
c5aa993b JM |
700 | default: |
701 | return -1; | |
702 | } | |
6f7f3f0d | 703 | return (dest < gdbarch_tdep (current_gdbarch)->text_segment_base) ? safety : dest; |
c906108c SS |
704 | } |
705 | ||
706 | ||
707 | /* Sequence of bytes for breakpoint instruction. */ | |
708 | ||
f4f9705a | 709 | const static unsigned char * |
7a78ae4e | 710 | rs6000_breakpoint_from_pc (CORE_ADDR *bp_addr, int *bp_size) |
c906108c | 711 | { |
aaab4dba AC |
712 | static unsigned char big_breakpoint[] = { 0x7d, 0x82, 0x10, 0x08 }; |
713 | static unsigned char little_breakpoint[] = { 0x08, 0x10, 0x82, 0x7d }; | |
c906108c | 714 | *bp_size = 4; |
d7449b42 | 715 | if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) |
c906108c SS |
716 | return big_breakpoint; |
717 | else | |
718 | return little_breakpoint; | |
719 | } | |
720 | ||
721 | ||
722 | /* AIX does not support PT_STEP. Simulate it. */ | |
723 | ||
724 | void | |
379d08a1 AC |
725 | rs6000_software_single_step (enum target_signal signal, |
726 | int insert_breakpoints_p) | |
c906108c | 727 | { |
7c40d541 KB |
728 | CORE_ADDR dummy; |
729 | int breakp_sz; | |
50fd1280 | 730 | const gdb_byte *breakp = rs6000_breakpoint_from_pc (&dummy, &breakp_sz); |
c906108c SS |
731 | int ii, insn; |
732 | CORE_ADDR loc; | |
733 | CORE_ADDR breaks[2]; | |
734 | int opcode; | |
735 | ||
c5aa993b JM |
736 | if (insert_breakpoints_p) |
737 | { | |
c5aa993b | 738 | loc = read_pc (); |
c906108c | 739 | |
c5aa993b | 740 | insn = read_memory_integer (loc, 4); |
c906108c | 741 | |
7c40d541 | 742 | breaks[0] = loc + breakp_sz; |
c5aa993b JM |
743 | opcode = insn >> 26; |
744 | breaks[1] = branch_dest (opcode, insn, loc, breaks[0]); | |
c906108c | 745 | |
c5aa993b JM |
746 | /* Don't put two breakpoints on the same address. */ |
747 | if (breaks[1] == breaks[0]) | |
748 | breaks[1] = -1; | |
c906108c | 749 | |
c5aa993b JM |
750 | for (ii = 0; ii < 2; ++ii) |
751 | { | |
c5aa993b JM |
752 | /* ignore invalid breakpoint. */ |
753 | if (breaks[ii] == -1) | |
754 | continue; | |
8181d85f | 755 | insert_single_step_breakpoint (breaks[ii]); |
c5aa993b | 756 | } |
c5aa993b JM |
757 | } |
758 | else | |
8181d85f | 759 | remove_single_step_breakpoints (); |
c906108c | 760 | |
c906108c | 761 | errno = 0; /* FIXME, don't ignore errors! */ |
c5aa993b | 762 | /* What errors? {read,write}_memory call error(). */ |
c906108c SS |
763 | } |
764 | ||
765 | ||
766 | /* return pc value after skipping a function prologue and also return | |
767 | information about a function frame. | |
768 | ||
769 | in struct rs6000_framedata fdata: | |
c5aa993b JM |
770 | - frameless is TRUE, if function does not have a frame. |
771 | - nosavedpc is TRUE, if function does not save %pc value in its frame. | |
772 | - offset is the initial size of this stack frame --- the amount by | |
773 | which we decrement the sp to allocate the frame. | |
774 | - saved_gpr is the number of the first saved gpr. | |
775 | - saved_fpr is the number of the first saved fpr. | |
6be8bc0c | 776 | - saved_vr is the number of the first saved vr. |
96ff0de4 | 777 | - saved_ev is the number of the first saved ev. |
c5aa993b JM |
778 | - alloca_reg is the number of the register used for alloca() handling. |
779 | Otherwise -1. | |
780 | - gpr_offset is the offset of the first saved gpr from the previous frame. | |
781 | - fpr_offset is the offset of the first saved fpr from the previous frame. | |
6be8bc0c | 782 | - vr_offset is the offset of the first saved vr from the previous frame. |
96ff0de4 | 783 | - ev_offset is the offset of the first saved ev from the previous frame. |
c5aa993b JM |
784 | - lr_offset is the offset of the saved lr |
785 | - cr_offset is the offset of the saved cr | |
6be8bc0c | 786 | - vrsave_offset is the offset of the saved vrsave register |
c5aa993b | 787 | */ |
c906108c SS |
788 | |
789 | #define SIGNED_SHORT(x) \ | |
790 | ((sizeof (short) == 2) \ | |
791 | ? ((int)(short)(x)) \ | |
792 | : ((int)((((x) & 0xffff) ^ 0x8000) - 0x8000))) | |
793 | ||
794 | #define GET_SRC_REG(x) (((x) >> 21) & 0x1f) | |
795 | ||
55d05f3b KB |
796 | /* Limit the number of skipped non-prologue instructions, as the examining |
797 | of the prologue is expensive. */ | |
798 | static int max_skip_non_prologue_insns = 10; | |
799 | ||
773df3e5 JB |
800 | /* Return nonzero if the given instruction OP can be part of the prologue |
801 | of a function and saves a parameter on the stack. FRAMEP should be | |
802 | set if one of the previous instructions in the function has set the | |
803 | Frame Pointer. */ | |
804 | ||
805 | static int | |
806 | store_param_on_stack_p (unsigned long op, int framep, int *r0_contains_arg) | |
807 | { | |
808 | /* Move parameters from argument registers to temporary register. */ | |
809 | if ((op & 0xfc0007fe) == 0x7c000378) /* mr(.) Rx,Ry */ | |
810 | { | |
811 | /* Rx must be scratch register r0. */ | |
812 | const int rx_regno = (op >> 16) & 31; | |
813 | /* Ry: Only r3 - r10 are used for parameter passing. */ | |
814 | const int ry_regno = GET_SRC_REG (op); | |
815 | ||
816 | if (rx_regno == 0 && ry_regno >= 3 && ry_regno <= 10) | |
817 | { | |
818 | *r0_contains_arg = 1; | |
819 | return 1; | |
820 | } | |
821 | else | |
822 | return 0; | |
823 | } | |
824 | ||
825 | /* Save a General Purpose Register on stack. */ | |
826 | ||
827 | if ((op & 0xfc1f0003) == 0xf8010000 || /* std Rx,NUM(r1) */ | |
828 | (op & 0xfc1f0000) == 0xd8010000) /* stfd Rx,NUM(r1) */ | |
829 | { | |
830 | /* Rx: Only r3 - r10 are used for parameter passing. */ | |
831 | const int rx_regno = GET_SRC_REG (op); | |
832 | ||
833 | return (rx_regno >= 3 && rx_regno <= 10); | |
834 | } | |
835 | ||
836 | /* Save a General Purpose Register on stack via the Frame Pointer. */ | |
837 | ||
838 | if (framep && | |
839 | ((op & 0xfc1f0000) == 0x901f0000 || /* st rx,NUM(r31) */ | |
840 | (op & 0xfc1f0000) == 0x981f0000 || /* stb Rx,NUM(r31) */ | |
841 | (op & 0xfc1f0000) == 0xd81f0000)) /* stfd Rx,NUM(r31) */ | |
842 | { | |
843 | /* Rx: Usually, only r3 - r10 are used for parameter passing. | |
844 | However, the compiler sometimes uses r0 to hold an argument. */ | |
845 | const int rx_regno = GET_SRC_REG (op); | |
846 | ||
847 | return ((rx_regno >= 3 && rx_regno <= 10) | |
848 | || (rx_regno == 0 && *r0_contains_arg)); | |
849 | } | |
850 | ||
851 | if ((op & 0xfc1f0000) == 0xfc010000) /* frsp, fp?,NUM(r1) */ | |
852 | { | |
853 | /* Only f2 - f8 are used for parameter passing. */ | |
854 | const int src_regno = GET_SRC_REG (op); | |
855 | ||
856 | return (src_regno >= 2 && src_regno <= 8); | |
857 | } | |
858 | ||
859 | if (framep && ((op & 0xfc1f0000) == 0xfc1f0000)) /* frsp, fp?,NUM(r31) */ | |
860 | { | |
861 | /* Only f2 - f8 are used for parameter passing. */ | |
862 | const int src_regno = GET_SRC_REG (op); | |
863 | ||
864 | return (src_regno >= 2 && src_regno <= 8); | |
865 | } | |
866 | ||
867 | /* Not an insn that saves a parameter on stack. */ | |
868 | return 0; | |
869 | } | |
55d05f3b | 870 | |
3c77c82a DJ |
871 | /* Assuming that INSN is a "bl" instruction located at PC, return |
872 | nonzero if the destination of the branch is a "blrl" instruction. | |
873 | ||
874 | This sequence is sometimes found in certain function prologues. | |
875 | It allows the function to load the LR register with a value that | |
876 | they can use to access PIC data using PC-relative offsets. */ | |
877 | ||
878 | static int | |
879 | bl_to_blrl_insn_p (CORE_ADDR pc, int insn) | |
880 | { | |
881 | const int opcode = 18; | |
882 | const CORE_ADDR dest = branch_dest (opcode, insn, pc, -1); | |
883 | int dest_insn; | |
884 | ||
885 | if (dest == -1) | |
886 | return 0; /* Should never happen, but just return zero to be safe. */ | |
887 | ||
888 | dest_insn = read_memory_integer (dest, 4); | |
889 | if ((dest_insn & 0xfc00ffff) == 0x4c000021) /* blrl */ | |
890 | return 1; | |
891 | ||
892 | return 0; | |
893 | } | |
894 | ||
7a78ae4e | 895 | static CORE_ADDR |
077276e8 | 896 | skip_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct rs6000_framedata *fdata) |
c906108c SS |
897 | { |
898 | CORE_ADDR orig_pc = pc; | |
55d05f3b | 899 | CORE_ADDR last_prologue_pc = pc; |
6be8bc0c | 900 | CORE_ADDR li_found_pc = 0; |
50fd1280 | 901 | gdb_byte buf[4]; |
c906108c SS |
902 | unsigned long op; |
903 | long offset = 0; | |
6be8bc0c | 904 | long vr_saved_offset = 0; |
482ca3f5 KB |
905 | int lr_reg = -1; |
906 | int cr_reg = -1; | |
6be8bc0c | 907 | int vr_reg = -1; |
96ff0de4 EZ |
908 | int ev_reg = -1; |
909 | long ev_offset = 0; | |
6be8bc0c | 910 | int vrsave_reg = -1; |
c906108c SS |
911 | int reg; |
912 | int framep = 0; | |
913 | int minimal_toc_loaded = 0; | |
ddb20c56 | 914 | int prev_insn_was_prologue_insn = 1; |
55d05f3b | 915 | int num_skip_non_prologue_insns = 0; |
773df3e5 | 916 | int r0_contains_arg = 0; |
96ff0de4 | 917 | const struct bfd_arch_info *arch_info = gdbarch_bfd_arch_info (current_gdbarch); |
6f99cb26 | 918 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
c906108c | 919 | |
ddb20c56 | 920 | memset (fdata, 0, sizeof (struct rs6000_framedata)); |
c906108c SS |
921 | fdata->saved_gpr = -1; |
922 | fdata->saved_fpr = -1; | |
6be8bc0c | 923 | fdata->saved_vr = -1; |
96ff0de4 | 924 | fdata->saved_ev = -1; |
c906108c SS |
925 | fdata->alloca_reg = -1; |
926 | fdata->frameless = 1; | |
927 | fdata->nosavedpc = 1; | |
928 | ||
55d05f3b | 929 | for (;; pc += 4) |
c906108c | 930 | { |
ddb20c56 KB |
931 | /* Sometimes it isn't clear if an instruction is a prologue |
932 | instruction or not. When we encounter one of these ambiguous | |
933 | cases, we'll set prev_insn_was_prologue_insn to 0 (false). | |
934 | Otherwise, we'll assume that it really is a prologue instruction. */ | |
935 | if (prev_insn_was_prologue_insn) | |
936 | last_prologue_pc = pc; | |
55d05f3b KB |
937 | |
938 | /* Stop scanning if we've hit the limit. */ | |
4e463ff5 | 939 | if (pc >= lim_pc) |
55d05f3b KB |
940 | break; |
941 | ||
ddb20c56 KB |
942 | prev_insn_was_prologue_insn = 1; |
943 | ||
55d05f3b | 944 | /* Fetch the instruction and convert it to an integer. */ |
ddb20c56 KB |
945 | if (target_read_memory (pc, buf, 4)) |
946 | break; | |
4e463ff5 | 947 | op = extract_unsigned_integer (buf, 4); |
c906108c | 948 | |
c5aa993b JM |
949 | if ((op & 0xfc1fffff) == 0x7c0802a6) |
950 | { /* mflr Rx */ | |
43b1ab88 AC |
951 | /* Since shared library / PIC code, which needs to get its |
952 | address at runtime, can appear to save more than one link | |
953 | register vis: | |
954 | ||
955 | *INDENT-OFF* | |
956 | stwu r1,-304(r1) | |
957 | mflr r3 | |
958 | bl 0xff570d0 (blrl) | |
959 | stw r30,296(r1) | |
960 | mflr r30 | |
961 | stw r31,300(r1) | |
962 | stw r3,308(r1); | |
963 | ... | |
964 | *INDENT-ON* | |
965 | ||
966 | remember just the first one, but skip over additional | |
967 | ones. */ | |
721d14ba | 968 | if (lr_reg == -1) |
43b1ab88 | 969 | lr_reg = (op & 0x03e00000); |
773df3e5 JB |
970 | if (lr_reg == 0) |
971 | r0_contains_arg = 0; | |
c5aa993b | 972 | continue; |
c5aa993b JM |
973 | } |
974 | else if ((op & 0xfc1fffff) == 0x7c000026) | |
975 | { /* mfcr Rx */ | |
98f08d3d | 976 | cr_reg = (op & 0x03e00000); |
773df3e5 JB |
977 | if (cr_reg == 0) |
978 | r0_contains_arg = 0; | |
c5aa993b | 979 | continue; |
c906108c | 980 | |
c906108c | 981 | } |
c5aa993b JM |
982 | else if ((op & 0xfc1f0000) == 0xd8010000) |
983 | { /* stfd Rx,NUM(r1) */ | |
984 | reg = GET_SRC_REG (op); | |
985 | if (fdata->saved_fpr == -1 || fdata->saved_fpr > reg) | |
986 | { | |
987 | fdata->saved_fpr = reg; | |
988 | fdata->fpr_offset = SIGNED_SHORT (op) + offset; | |
989 | } | |
990 | continue; | |
c906108c | 991 | |
c5aa993b JM |
992 | } |
993 | else if (((op & 0xfc1f0000) == 0xbc010000) || /* stm Rx, NUM(r1) */ | |
7a78ae4e ND |
994 | (((op & 0xfc1f0000) == 0x90010000 || /* st rx,NUM(r1) */ |
995 | (op & 0xfc1f0003) == 0xf8010000) && /* std rx,NUM(r1) */ | |
996 | (op & 0x03e00000) >= 0x01a00000)) /* rx >= r13 */ | |
c5aa993b JM |
997 | { |
998 | ||
999 | reg = GET_SRC_REG (op); | |
1000 | if (fdata->saved_gpr == -1 || fdata->saved_gpr > reg) | |
1001 | { | |
1002 | fdata->saved_gpr = reg; | |
7a78ae4e | 1003 | if ((op & 0xfc1f0003) == 0xf8010000) |
98f08d3d | 1004 | op &= ~3UL; |
c5aa993b JM |
1005 | fdata->gpr_offset = SIGNED_SHORT (op) + offset; |
1006 | } | |
1007 | continue; | |
c906108c | 1008 | |
ddb20c56 KB |
1009 | } |
1010 | else if ((op & 0xffff0000) == 0x60000000) | |
1011 | { | |
96ff0de4 | 1012 | /* nop */ |
ddb20c56 KB |
1013 | /* Allow nops in the prologue, but do not consider them to |
1014 | be part of the prologue unless followed by other prologue | |
1015 | instructions. */ | |
1016 | prev_insn_was_prologue_insn = 0; | |
1017 | continue; | |
1018 | ||
c906108c | 1019 | } |
c5aa993b JM |
1020 | else if ((op & 0xffff0000) == 0x3c000000) |
1021 | { /* addis 0,0,NUM, used | |
1022 | for >= 32k frames */ | |
1023 | fdata->offset = (op & 0x0000ffff) << 16; | |
1024 | fdata->frameless = 0; | |
773df3e5 | 1025 | r0_contains_arg = 0; |
c5aa993b JM |
1026 | continue; |
1027 | ||
1028 | } | |
1029 | else if ((op & 0xffff0000) == 0x60000000) | |
1030 | { /* ori 0,0,NUM, 2nd ha | |
1031 | lf of >= 32k frames */ | |
1032 | fdata->offset |= (op & 0x0000ffff); | |
1033 | fdata->frameless = 0; | |
773df3e5 | 1034 | r0_contains_arg = 0; |
c5aa993b JM |
1035 | continue; |
1036 | ||
1037 | } | |
be723e22 | 1038 | else if (lr_reg >= 0 && |
98f08d3d KB |
1039 | /* std Rx, NUM(r1) || stdu Rx, NUM(r1) */ |
1040 | (((op & 0xffff0000) == (lr_reg | 0xf8010000)) || | |
1041 | /* stw Rx, NUM(r1) */ | |
1042 | ((op & 0xffff0000) == (lr_reg | 0x90010000)) || | |
1043 | /* stwu Rx, NUM(r1) */ | |
1044 | ((op & 0xffff0000) == (lr_reg | 0x94010000)))) | |
1045 | { /* where Rx == lr */ | |
1046 | fdata->lr_offset = offset; | |
c5aa993b | 1047 | fdata->nosavedpc = 0; |
be723e22 MS |
1048 | /* Invalidate lr_reg, but don't set it to -1. |
1049 | That would mean that it had never been set. */ | |
1050 | lr_reg = -2; | |
98f08d3d KB |
1051 | if ((op & 0xfc000003) == 0xf8000000 || /* std */ |
1052 | (op & 0xfc000000) == 0x90000000) /* stw */ | |
1053 | { | |
1054 | /* Does not update r1, so add displacement to lr_offset. */ | |
1055 | fdata->lr_offset += SIGNED_SHORT (op); | |
1056 | } | |
c5aa993b JM |
1057 | continue; |
1058 | ||
1059 | } | |
be723e22 | 1060 | else if (cr_reg >= 0 && |
98f08d3d KB |
1061 | /* std Rx, NUM(r1) || stdu Rx, NUM(r1) */ |
1062 | (((op & 0xffff0000) == (cr_reg | 0xf8010000)) || | |
1063 | /* stw Rx, NUM(r1) */ | |
1064 | ((op & 0xffff0000) == (cr_reg | 0x90010000)) || | |
1065 | /* stwu Rx, NUM(r1) */ | |
1066 | ((op & 0xffff0000) == (cr_reg | 0x94010000)))) | |
1067 | { /* where Rx == cr */ | |
1068 | fdata->cr_offset = offset; | |
be723e22 MS |
1069 | /* Invalidate cr_reg, but don't set it to -1. |
1070 | That would mean that it had never been set. */ | |
1071 | cr_reg = -2; | |
98f08d3d KB |
1072 | if ((op & 0xfc000003) == 0xf8000000 || |
1073 | (op & 0xfc000000) == 0x90000000) | |
1074 | { | |
1075 | /* Does not update r1, so add displacement to cr_offset. */ | |
1076 | fdata->cr_offset += SIGNED_SHORT (op); | |
1077 | } | |
c5aa993b JM |
1078 | continue; |
1079 | ||
1080 | } | |
721d14ba DJ |
1081 | else if ((op & 0xfe80ffff) == 0x42800005 && lr_reg != -1) |
1082 | { | |
1083 | /* bcl 20,xx,.+4 is used to get the current PC, with or without | |
1084 | prediction bits. If the LR has already been saved, we can | |
1085 | skip it. */ | |
1086 | continue; | |
1087 | } | |
c5aa993b JM |
1088 | else if (op == 0x48000005) |
1089 | { /* bl .+4 used in | |
1090 | -mrelocatable */ | |
1091 | continue; | |
1092 | ||
1093 | } | |
1094 | else if (op == 0x48000004) | |
1095 | { /* b .+4 (xlc) */ | |
1096 | break; | |
1097 | ||
c5aa993b | 1098 | } |
6be8bc0c EZ |
1099 | else if ((op & 0xffff0000) == 0x3fc00000 || /* addis 30,0,foo@ha, used |
1100 | in V.4 -mminimal-toc */ | |
c5aa993b JM |
1101 | (op & 0xffff0000) == 0x3bde0000) |
1102 | { /* addi 30,30,foo@l */ | |
1103 | continue; | |
c906108c | 1104 | |
c5aa993b JM |
1105 | } |
1106 | else if ((op & 0xfc000001) == 0x48000001) | |
1107 | { /* bl foo, | |
1108 | to save fprs??? */ | |
c906108c | 1109 | |
c5aa993b | 1110 | fdata->frameless = 0; |
3c77c82a DJ |
1111 | |
1112 | /* If the return address has already been saved, we can skip | |
1113 | calls to blrl (for PIC). */ | |
1114 | if (lr_reg != -1 && bl_to_blrl_insn_p (pc, op)) | |
1115 | continue; | |
1116 | ||
6be8bc0c | 1117 | /* Don't skip over the subroutine call if it is not within |
ebd98106 FF |
1118 | the first three instructions of the prologue and either |
1119 | we have no line table information or the line info tells | |
1120 | us that the subroutine call is not part of the line | |
1121 | associated with the prologue. */ | |
c5aa993b | 1122 | if ((pc - orig_pc) > 8) |
ebd98106 FF |
1123 | { |
1124 | struct symtab_and_line prologue_sal = find_pc_line (orig_pc, 0); | |
1125 | struct symtab_and_line this_sal = find_pc_line (pc, 0); | |
1126 | ||
1127 | if ((prologue_sal.line == 0) || (prologue_sal.line != this_sal.line)) | |
1128 | break; | |
1129 | } | |
c5aa993b JM |
1130 | |
1131 | op = read_memory_integer (pc + 4, 4); | |
1132 | ||
6be8bc0c EZ |
1133 | /* At this point, make sure this is not a trampoline |
1134 | function (a function that simply calls another functions, | |
1135 | and nothing else). If the next is not a nop, this branch | |
1136 | was part of the function prologue. */ | |
c5aa993b JM |
1137 | |
1138 | if (op == 0x4def7b82 || op == 0) /* crorc 15, 15, 15 */ | |
1139 | break; /* don't skip over | |
1140 | this branch */ | |
1141 | continue; | |
1142 | ||
c5aa993b | 1143 | } |
98f08d3d KB |
1144 | /* update stack pointer */ |
1145 | else if ((op & 0xfc1f0000) == 0x94010000) | |
1146 | { /* stu rX,NUM(r1) || stwu rX,NUM(r1) */ | |
c5aa993b JM |
1147 | fdata->frameless = 0; |
1148 | fdata->offset = SIGNED_SHORT (op); | |
1149 | offset = fdata->offset; | |
1150 | continue; | |
c5aa993b | 1151 | } |
98f08d3d KB |
1152 | else if ((op & 0xfc1f016a) == 0x7c01016e) |
1153 | { /* stwux rX,r1,rY */ | |
1154 | /* no way to figure out what r1 is going to be */ | |
1155 | fdata->frameless = 0; | |
1156 | offset = fdata->offset; | |
1157 | continue; | |
1158 | } | |
1159 | else if ((op & 0xfc1f0003) == 0xf8010001) | |
1160 | { /* stdu rX,NUM(r1) */ | |
1161 | fdata->frameless = 0; | |
1162 | fdata->offset = SIGNED_SHORT (op & ~3UL); | |
1163 | offset = fdata->offset; | |
1164 | continue; | |
1165 | } | |
1166 | else if ((op & 0xfc1f016a) == 0x7c01016a) | |
1167 | { /* stdux rX,r1,rY */ | |
1168 | /* no way to figure out what r1 is going to be */ | |
c5aa993b JM |
1169 | fdata->frameless = 0; |
1170 | offset = fdata->offset; | |
1171 | continue; | |
c5aa993b | 1172 | } |
7313566f FF |
1173 | else if ((op & 0xffff0000) == 0x38210000) |
1174 | { /* addi r1,r1,SIMM */ | |
1175 | fdata->frameless = 0; | |
1176 | fdata->offset += SIGNED_SHORT (op); | |
1177 | offset = fdata->offset; | |
1178 | continue; | |
1179 | } | |
4e463ff5 DJ |
1180 | /* Load up minimal toc pointer. Do not treat an epilogue restore |
1181 | of r31 as a minimal TOC load. */ | |
98f08d3d KB |
1182 | else if (((op >> 22) == 0x20f || /* l r31,... or l r30,... */ |
1183 | (op >> 22) == 0x3af) /* ld r31,... or ld r30,... */ | |
4e463ff5 | 1184 | && !framep |
c5aa993b | 1185 | && !minimal_toc_loaded) |
98f08d3d | 1186 | { |
c5aa993b JM |
1187 | minimal_toc_loaded = 1; |
1188 | continue; | |
1189 | ||
f6077098 KB |
1190 | /* move parameters from argument registers to local variable |
1191 | registers */ | |
1192 | } | |
1193 | else if ((op & 0xfc0007fe) == 0x7c000378 && /* mr(.) Rx,Ry */ | |
1194 | (((op >> 21) & 31) >= 3) && /* R3 >= Ry >= R10 */ | |
1195 | (((op >> 21) & 31) <= 10) && | |
96ff0de4 | 1196 | ((long) ((op >> 16) & 31) >= fdata->saved_gpr)) /* Rx: local var reg */ |
f6077098 KB |
1197 | { |
1198 | continue; | |
1199 | ||
c5aa993b JM |
1200 | /* store parameters in stack */ |
1201 | } | |
e802b915 | 1202 | /* Move parameters from argument registers to temporary register. */ |
773df3e5 | 1203 | else if (store_param_on_stack_p (op, framep, &r0_contains_arg)) |
e802b915 | 1204 | { |
c5aa993b JM |
1205 | continue; |
1206 | ||
1207 | /* Set up frame pointer */ | |
1208 | } | |
1209 | else if (op == 0x603f0000 /* oril r31, r1, 0x0 */ | |
1210 | || op == 0x7c3f0b78) | |
1211 | { /* mr r31, r1 */ | |
1212 | fdata->frameless = 0; | |
1213 | framep = 1; | |
6f99cb26 | 1214 | fdata->alloca_reg = (tdep->ppc_gp0_regnum + 31); |
c5aa993b JM |
1215 | continue; |
1216 | ||
1217 | /* Another way to set up the frame pointer. */ | |
1218 | } | |
1219 | else if ((op & 0xfc1fffff) == 0x38010000) | |
1220 | { /* addi rX, r1, 0x0 */ | |
1221 | fdata->frameless = 0; | |
1222 | framep = 1; | |
6f99cb26 AC |
1223 | fdata->alloca_reg = (tdep->ppc_gp0_regnum |
1224 | + ((op & ~0x38010000) >> 21)); | |
c5aa993b | 1225 | continue; |
c5aa993b | 1226 | } |
6be8bc0c EZ |
1227 | /* AltiVec related instructions. */ |
1228 | /* Store the vrsave register (spr 256) in another register for | |
1229 | later manipulation, or load a register into the vrsave | |
1230 | register. 2 instructions are used: mfvrsave and | |
1231 | mtvrsave. They are shorthand notation for mfspr Rn, SPR256 | |
1232 | and mtspr SPR256, Rn. */ | |
1233 | /* mfspr Rn SPR256 == 011111 nnnnn 0000001000 01010100110 | |
1234 | mtspr SPR256 Rn == 011111 nnnnn 0000001000 01110100110 */ | |
1235 | else if ((op & 0xfc1fffff) == 0x7c0042a6) /* mfvrsave Rn */ | |
1236 | { | |
1237 | vrsave_reg = GET_SRC_REG (op); | |
1238 | continue; | |
1239 | } | |
1240 | else if ((op & 0xfc1fffff) == 0x7c0043a6) /* mtvrsave Rn */ | |
1241 | { | |
1242 | continue; | |
1243 | } | |
1244 | /* Store the register where vrsave was saved to onto the stack: | |
1245 | rS is the register where vrsave was stored in a previous | |
1246 | instruction. */ | |
1247 | /* 100100 sssss 00001 dddddddd dddddddd */ | |
1248 | else if ((op & 0xfc1f0000) == 0x90010000) /* stw rS, d(r1) */ | |
1249 | { | |
1250 | if (vrsave_reg == GET_SRC_REG (op)) | |
1251 | { | |
1252 | fdata->vrsave_offset = SIGNED_SHORT (op) + offset; | |
1253 | vrsave_reg = -1; | |
1254 | } | |
1255 | continue; | |
1256 | } | |
1257 | /* Compute the new value of vrsave, by modifying the register | |
1258 | where vrsave was saved to. */ | |
1259 | else if (((op & 0xfc000000) == 0x64000000) /* oris Ra, Rs, UIMM */ | |
1260 | || ((op & 0xfc000000) == 0x60000000))/* ori Ra, Rs, UIMM */ | |
1261 | { | |
1262 | continue; | |
1263 | } | |
1264 | /* li r0, SIMM (short for addi r0, 0, SIMM). This is the first | |
1265 | in a pair of insns to save the vector registers on the | |
1266 | stack. */ | |
1267 | /* 001110 00000 00000 iiii iiii iiii iiii */ | |
96ff0de4 EZ |
1268 | /* 001110 01110 00000 iiii iiii iiii iiii */ |
1269 | else if ((op & 0xffff0000) == 0x38000000 /* li r0, SIMM */ | |
1270 | || (op & 0xffff0000) == 0x39c00000) /* li r14, SIMM */ | |
6be8bc0c | 1271 | { |
773df3e5 JB |
1272 | if ((op & 0xffff0000) == 0x38000000) |
1273 | r0_contains_arg = 0; | |
6be8bc0c EZ |
1274 | li_found_pc = pc; |
1275 | vr_saved_offset = SIGNED_SHORT (op); | |
773df3e5 JB |
1276 | |
1277 | /* This insn by itself is not part of the prologue, unless | |
1278 | if part of the pair of insns mentioned above. So do not | |
1279 | record this insn as part of the prologue yet. */ | |
1280 | prev_insn_was_prologue_insn = 0; | |
6be8bc0c EZ |
1281 | } |
1282 | /* Store vector register S at (r31+r0) aligned to 16 bytes. */ | |
1283 | /* 011111 sssss 11111 00000 00111001110 */ | |
1284 | else if ((op & 0xfc1fffff) == 0x7c1f01ce) /* stvx Vs, R31, R0 */ | |
1285 | { | |
1286 | if (pc == (li_found_pc + 4)) | |
1287 | { | |
1288 | vr_reg = GET_SRC_REG (op); | |
1289 | /* If this is the first vector reg to be saved, or if | |
1290 | it has a lower number than others previously seen, | |
1291 | reupdate the frame info. */ | |
1292 | if (fdata->saved_vr == -1 || fdata->saved_vr > vr_reg) | |
1293 | { | |
1294 | fdata->saved_vr = vr_reg; | |
1295 | fdata->vr_offset = vr_saved_offset + offset; | |
1296 | } | |
1297 | vr_saved_offset = -1; | |
1298 | vr_reg = -1; | |
1299 | li_found_pc = 0; | |
1300 | } | |
1301 | } | |
1302 | /* End AltiVec related instructions. */ | |
96ff0de4 EZ |
1303 | |
1304 | /* Start BookE related instructions. */ | |
1305 | /* Store gen register S at (r31+uimm). | |
1306 | Any register less than r13 is volatile, so we don't care. */ | |
1307 | /* 000100 sssss 11111 iiiii 01100100001 */ | |
1308 | else if (arch_info->mach == bfd_mach_ppc_e500 | |
1309 | && (op & 0xfc1f07ff) == 0x101f0321) /* evstdd Rs,uimm(R31) */ | |
1310 | { | |
1311 | if ((op & 0x03e00000) >= 0x01a00000) /* Rs >= r13 */ | |
1312 | { | |
1313 | unsigned int imm; | |
1314 | ev_reg = GET_SRC_REG (op); | |
1315 | imm = (op >> 11) & 0x1f; | |
1316 | ev_offset = imm * 8; | |
1317 | /* If this is the first vector reg to be saved, or if | |
1318 | it has a lower number than others previously seen, | |
1319 | reupdate the frame info. */ | |
1320 | if (fdata->saved_ev == -1 || fdata->saved_ev > ev_reg) | |
1321 | { | |
1322 | fdata->saved_ev = ev_reg; | |
1323 | fdata->ev_offset = ev_offset + offset; | |
1324 | } | |
1325 | } | |
1326 | continue; | |
1327 | } | |
1328 | /* Store gen register rS at (r1+rB). */ | |
1329 | /* 000100 sssss 00001 bbbbb 01100100000 */ | |
1330 | else if (arch_info->mach == bfd_mach_ppc_e500 | |
1331 | && (op & 0xffe007ff) == 0x13e00320) /* evstddx RS,R1,Rb */ | |
1332 | { | |
1333 | if (pc == (li_found_pc + 4)) | |
1334 | { | |
1335 | ev_reg = GET_SRC_REG (op); | |
1336 | /* If this is the first vector reg to be saved, or if | |
1337 | it has a lower number than others previously seen, | |
1338 | reupdate the frame info. */ | |
1339 | /* We know the contents of rB from the previous instruction. */ | |
1340 | if (fdata->saved_ev == -1 || fdata->saved_ev > ev_reg) | |
1341 | { | |
1342 | fdata->saved_ev = ev_reg; | |
1343 | fdata->ev_offset = vr_saved_offset + offset; | |
1344 | } | |
1345 | vr_saved_offset = -1; | |
1346 | ev_reg = -1; | |
1347 | li_found_pc = 0; | |
1348 | } | |
1349 | continue; | |
1350 | } | |
1351 | /* Store gen register r31 at (rA+uimm). */ | |
1352 | /* 000100 11111 aaaaa iiiii 01100100001 */ | |
1353 | else if (arch_info->mach == bfd_mach_ppc_e500 | |
1354 | && (op & 0xffe007ff) == 0x13e00321) /* evstdd R31,Ra,UIMM */ | |
1355 | { | |
1356 | /* Wwe know that the source register is 31 already, but | |
1357 | it can't hurt to compute it. */ | |
1358 | ev_reg = GET_SRC_REG (op); | |
1359 | ev_offset = ((op >> 11) & 0x1f) * 8; | |
1360 | /* If this is the first vector reg to be saved, or if | |
1361 | it has a lower number than others previously seen, | |
1362 | reupdate the frame info. */ | |
1363 | if (fdata->saved_ev == -1 || fdata->saved_ev > ev_reg) | |
1364 | { | |
1365 | fdata->saved_ev = ev_reg; | |
1366 | fdata->ev_offset = ev_offset + offset; | |
1367 | } | |
1368 | ||
1369 | continue; | |
1370 | } | |
1371 | /* Store gen register S at (r31+r0). | |
1372 | Store param on stack when offset from SP bigger than 4 bytes. */ | |
1373 | /* 000100 sssss 11111 00000 01100100000 */ | |
1374 | else if (arch_info->mach == bfd_mach_ppc_e500 | |
1375 | && (op & 0xfc1fffff) == 0x101f0320) /* evstddx Rs,R31,R0 */ | |
1376 | { | |
1377 | if (pc == (li_found_pc + 4)) | |
1378 | { | |
1379 | if ((op & 0x03e00000) >= 0x01a00000) | |
1380 | { | |
1381 | ev_reg = GET_SRC_REG (op); | |
1382 | /* If this is the first vector reg to be saved, or if | |
1383 | it has a lower number than others previously seen, | |
1384 | reupdate the frame info. */ | |
1385 | /* We know the contents of r0 from the previous | |
1386 | instruction. */ | |
1387 | if (fdata->saved_ev == -1 || fdata->saved_ev > ev_reg) | |
1388 | { | |
1389 | fdata->saved_ev = ev_reg; | |
1390 | fdata->ev_offset = vr_saved_offset + offset; | |
1391 | } | |
1392 | ev_reg = -1; | |
1393 | } | |
1394 | vr_saved_offset = -1; | |
1395 | li_found_pc = 0; | |
1396 | continue; | |
1397 | } | |
1398 | } | |
1399 | /* End BookE related instructions. */ | |
1400 | ||
c5aa993b JM |
1401 | else |
1402 | { | |
55d05f3b KB |
1403 | /* Not a recognized prologue instruction. |
1404 | Handle optimizer code motions into the prologue by continuing | |
1405 | the search if we have no valid frame yet or if the return | |
1406 | address is not yet saved in the frame. */ | |
4e463ff5 | 1407 | if (fdata->frameless == 0 && fdata->nosavedpc == 0) |
55d05f3b KB |
1408 | break; |
1409 | ||
1410 | if (op == 0x4e800020 /* blr */ | |
1411 | || op == 0x4e800420) /* bctr */ | |
1412 | /* Do not scan past epilogue in frameless functions or | |
1413 | trampolines. */ | |
1414 | break; | |
1415 | if ((op & 0xf4000000) == 0x40000000) /* bxx */ | |
64366f1c | 1416 | /* Never skip branches. */ |
55d05f3b KB |
1417 | break; |
1418 | ||
1419 | if (num_skip_non_prologue_insns++ > max_skip_non_prologue_insns) | |
1420 | /* Do not scan too many insns, scanning insns is expensive with | |
1421 | remote targets. */ | |
1422 | break; | |
1423 | ||
1424 | /* Continue scanning. */ | |
1425 | prev_insn_was_prologue_insn = 0; | |
1426 | continue; | |
c5aa993b | 1427 | } |
c906108c SS |
1428 | } |
1429 | ||
1430 | #if 0 | |
1431 | /* I have problems with skipping over __main() that I need to address | |
1432 | * sometime. Previously, I used to use misc_function_vector which | |
1433 | * didn't work as well as I wanted to be. -MGO */ | |
1434 | ||
1435 | /* If the first thing after skipping a prolog is a branch to a function, | |
1436 | this might be a call to an initializer in main(), introduced by gcc2. | |
64366f1c | 1437 | We'd like to skip over it as well. Fortunately, xlc does some extra |
c906108c | 1438 | work before calling a function right after a prologue, thus we can |
64366f1c | 1439 | single out such gcc2 behaviour. */ |
c906108c | 1440 | |
c906108c | 1441 | |
c5aa993b JM |
1442 | if ((op & 0xfc000001) == 0x48000001) |
1443 | { /* bl foo, an initializer function? */ | |
1444 | op = read_memory_integer (pc + 4, 4); | |
1445 | ||
1446 | if (op == 0x4def7b82) | |
1447 | { /* cror 0xf, 0xf, 0xf (nop) */ | |
c906108c | 1448 | |
64366f1c EZ |
1449 | /* Check and see if we are in main. If so, skip over this |
1450 | initializer function as well. */ | |
c906108c | 1451 | |
c5aa993b | 1452 | tmp = find_pc_misc_function (pc); |
6314a349 AC |
1453 | if (tmp >= 0 |
1454 | && strcmp (misc_function_vector[tmp].name, main_name ()) == 0) | |
c5aa993b JM |
1455 | return pc + 8; |
1456 | } | |
c906108c | 1457 | } |
c906108c | 1458 | #endif /* 0 */ |
c5aa993b JM |
1459 | |
1460 | fdata->offset = -fdata->offset; | |
ddb20c56 | 1461 | return last_prologue_pc; |
c906108c SS |
1462 | } |
1463 | ||
1464 | ||
1465 | /************************************************************************* | |
f6077098 | 1466 | Support for creating pushing a dummy frame into the stack, and popping |
c906108c SS |
1467 | frames, etc. |
1468 | *************************************************************************/ | |
1469 | ||
c906108c | 1470 | |
11269d7e AC |
1471 | /* All the ABI's require 16 byte alignment. */ |
1472 | static CORE_ADDR | |
1473 | rs6000_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr) | |
1474 | { | |
1475 | return (addr & -16); | |
1476 | } | |
1477 | ||
7a78ae4e | 1478 | /* Pass the arguments in either registers, or in the stack. In RS/6000, |
c906108c SS |
1479 | the first eight words of the argument list (that might be less than |
1480 | eight parameters if some parameters occupy more than one word) are | |
7a78ae4e | 1481 | passed in r3..r10 registers. float and double parameters are |
64366f1c EZ |
1482 | passed in fpr's, in addition to that. Rest of the parameters if any |
1483 | are passed in user stack. There might be cases in which half of the | |
c906108c SS |
1484 | parameter is copied into registers, the other half is pushed into |
1485 | stack. | |
1486 | ||
7a78ae4e ND |
1487 | Stack must be aligned on 64-bit boundaries when synthesizing |
1488 | function calls. | |
1489 | ||
c906108c SS |
1490 | If the function is returning a structure, then the return address is passed |
1491 | in r3, then the first 7 words of the parameters can be passed in registers, | |
64366f1c | 1492 | starting from r4. */ |
c906108c | 1493 | |
7a78ae4e | 1494 | static CORE_ADDR |
7d9b040b | 1495 | rs6000_push_dummy_call (struct gdbarch *gdbarch, struct value *function, |
77b2b6d4 AC |
1496 | struct regcache *regcache, CORE_ADDR bp_addr, |
1497 | int nargs, struct value **args, CORE_ADDR sp, | |
1498 | int struct_return, CORE_ADDR struct_addr) | |
c906108c | 1499 | { |
7a41266b | 1500 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
c906108c SS |
1501 | int ii; |
1502 | int len = 0; | |
c5aa993b JM |
1503 | int argno; /* current argument number */ |
1504 | int argbytes; /* current argument byte */ | |
50fd1280 | 1505 | gdb_byte tmp_buffer[50]; |
c5aa993b | 1506 | int f_argno = 0; /* current floating point argno */ |
21283beb | 1507 | int wordsize = gdbarch_tdep (current_gdbarch)->wordsize; |
7d9b040b | 1508 | CORE_ADDR func_addr = find_function_addr (function, NULL); |
c906108c | 1509 | |
ea7c478f | 1510 | struct value *arg = 0; |
c906108c SS |
1511 | struct type *type; |
1512 | ||
1513 | CORE_ADDR saved_sp; | |
1514 | ||
383f0f5b JB |
1515 | /* The calling convention this function implements assumes the |
1516 | processor has floating-point registers. We shouldn't be using it | |
1517 | on PPC variants that lack them. */ | |
1518 | gdb_assert (ppc_floating_point_unit_p (current_gdbarch)); | |
1519 | ||
64366f1c | 1520 | /* The first eight words of ther arguments are passed in registers. |
7a41266b AC |
1521 | Copy them appropriately. */ |
1522 | ii = 0; | |
1523 | ||
1524 | /* If the function is returning a `struct', then the first word | |
1525 | (which will be passed in r3) is used for struct return address. | |
1526 | In that case we should advance one word and start from r4 | |
1527 | register to copy parameters. */ | |
1528 | if (struct_return) | |
1529 | { | |
1530 | regcache_raw_write_unsigned (regcache, tdep->ppc_gp0_regnum + 3, | |
1531 | struct_addr); | |
1532 | ii++; | |
1533 | } | |
c906108c SS |
1534 | |
1535 | /* | |
c5aa993b JM |
1536 | effectively indirect call... gcc does... |
1537 | ||
1538 | return_val example( float, int); | |
1539 | ||
1540 | eabi: | |
1541 | float in fp0, int in r3 | |
1542 | offset of stack on overflow 8/16 | |
1543 | for varargs, must go by type. | |
1544 | power open: | |
1545 | float in r3&r4, int in r5 | |
1546 | offset of stack on overflow different | |
1547 | both: | |
1548 | return in r3 or f0. If no float, must study how gcc emulates floats; | |
1549 | pay attention to arg promotion. | |
1550 | User may have to cast\args to handle promotion correctly | |
1551 | since gdb won't know if prototype supplied or not. | |
1552 | */ | |
c906108c | 1553 | |
c5aa993b JM |
1554 | for (argno = 0, argbytes = 0; argno < nargs && ii < 8; ++ii) |
1555 | { | |
3acba339 | 1556 | int reg_size = register_size (current_gdbarch, ii + 3); |
c5aa993b JM |
1557 | |
1558 | arg = args[argno]; | |
df407dfe | 1559 | type = check_typedef (value_type (arg)); |
c5aa993b JM |
1560 | len = TYPE_LENGTH (type); |
1561 | ||
1562 | if (TYPE_CODE (type) == TYPE_CODE_FLT) | |
1563 | { | |
1564 | ||
64366f1c | 1565 | /* Floating point arguments are passed in fpr's, as well as gpr's. |
c5aa993b | 1566 | There are 13 fpr's reserved for passing parameters. At this point |
64366f1c | 1567 | there is no way we would run out of them. */ |
c5aa993b | 1568 | |
9f335945 KB |
1569 | gdb_assert (len <= 8); |
1570 | ||
1571 | regcache_cooked_write (regcache, | |
1572 | tdep->ppc_fp0_regnum + 1 + f_argno, | |
0fd88904 | 1573 | value_contents (arg)); |
c5aa993b JM |
1574 | ++f_argno; |
1575 | } | |
1576 | ||
f6077098 | 1577 | if (len > reg_size) |
c5aa993b JM |
1578 | { |
1579 | ||
64366f1c | 1580 | /* Argument takes more than one register. */ |
c5aa993b JM |
1581 | while (argbytes < len) |
1582 | { | |
50fd1280 | 1583 | gdb_byte word[MAX_REGISTER_SIZE]; |
9f335945 KB |
1584 | memset (word, 0, reg_size); |
1585 | memcpy (word, | |
0fd88904 | 1586 | ((char *) value_contents (arg)) + argbytes, |
f6077098 KB |
1587 | (len - argbytes) > reg_size |
1588 | ? reg_size : len - argbytes); | |
9f335945 KB |
1589 | regcache_cooked_write (regcache, |
1590 | tdep->ppc_gp0_regnum + 3 + ii, | |
1591 | word); | |
f6077098 | 1592 | ++ii, argbytes += reg_size; |
c5aa993b JM |
1593 | |
1594 | if (ii >= 8) | |
1595 | goto ran_out_of_registers_for_arguments; | |
1596 | } | |
1597 | argbytes = 0; | |
1598 | --ii; | |
1599 | } | |
1600 | else | |
64366f1c EZ |
1601 | { |
1602 | /* Argument can fit in one register. No problem. */ | |
d7449b42 | 1603 | int adj = TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? reg_size - len : 0; |
50fd1280 | 1604 | gdb_byte word[MAX_REGISTER_SIZE]; |
9f335945 KB |
1605 | |
1606 | memset (word, 0, reg_size); | |
0fd88904 | 1607 | memcpy (word, value_contents (arg), len); |
9f335945 | 1608 | regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 3 +ii, word); |
c5aa993b JM |
1609 | } |
1610 | ++argno; | |
c906108c | 1611 | } |
c906108c SS |
1612 | |
1613 | ran_out_of_registers_for_arguments: | |
1614 | ||
7a78ae4e | 1615 | saved_sp = read_sp (); |
cc9836a8 | 1616 | |
64366f1c | 1617 | /* Location for 8 parameters are always reserved. */ |
7a78ae4e | 1618 | sp -= wordsize * 8; |
f6077098 | 1619 | |
64366f1c | 1620 | /* Another six words for back chain, TOC register, link register, etc. */ |
7a78ae4e | 1621 | sp -= wordsize * 6; |
f6077098 | 1622 | |
64366f1c | 1623 | /* Stack pointer must be quadword aligned. */ |
7a78ae4e | 1624 | sp &= -16; |
c906108c | 1625 | |
64366f1c EZ |
1626 | /* If there are more arguments, allocate space for them in |
1627 | the stack, then push them starting from the ninth one. */ | |
c906108c | 1628 | |
c5aa993b JM |
1629 | if ((argno < nargs) || argbytes) |
1630 | { | |
1631 | int space = 0, jj; | |
c906108c | 1632 | |
c5aa993b JM |
1633 | if (argbytes) |
1634 | { | |
1635 | space += ((len - argbytes + 3) & -4); | |
1636 | jj = argno + 1; | |
1637 | } | |
1638 | else | |
1639 | jj = argno; | |
c906108c | 1640 | |
c5aa993b JM |
1641 | for (; jj < nargs; ++jj) |
1642 | { | |
ea7c478f | 1643 | struct value *val = args[jj]; |
df407dfe | 1644 | space += ((TYPE_LENGTH (value_type (val))) + 3) & -4; |
c5aa993b | 1645 | } |
c906108c | 1646 | |
64366f1c | 1647 | /* Add location required for the rest of the parameters. */ |
f6077098 | 1648 | space = (space + 15) & -16; |
c5aa993b | 1649 | sp -= space; |
c906108c | 1650 | |
7aea86e6 AC |
1651 | /* This is another instance we need to be concerned about |
1652 | securing our stack space. If we write anything underneath %sp | |
1653 | (r1), we might conflict with the kernel who thinks he is free | |
1654 | to use this area. So, update %sp first before doing anything | |
1655 | else. */ | |
1656 | ||
1657 | regcache_raw_write_signed (regcache, SP_REGNUM, sp); | |
1658 | ||
64366f1c EZ |
1659 | /* If the last argument copied into the registers didn't fit there |
1660 | completely, push the rest of it into stack. */ | |
c906108c | 1661 | |
c5aa993b JM |
1662 | if (argbytes) |
1663 | { | |
1664 | write_memory (sp + 24 + (ii * 4), | |
50fd1280 | 1665 | value_contents (arg) + argbytes, |
c5aa993b JM |
1666 | len - argbytes); |
1667 | ++argno; | |
1668 | ii += ((len - argbytes + 3) & -4) / 4; | |
1669 | } | |
c906108c | 1670 | |
64366f1c | 1671 | /* Push the rest of the arguments into stack. */ |
c5aa993b JM |
1672 | for (; argno < nargs; ++argno) |
1673 | { | |
c906108c | 1674 | |
c5aa993b | 1675 | arg = args[argno]; |
df407dfe | 1676 | type = check_typedef (value_type (arg)); |
c5aa993b | 1677 | len = TYPE_LENGTH (type); |
c906108c SS |
1678 | |
1679 | ||
64366f1c EZ |
1680 | /* Float types should be passed in fpr's, as well as in the |
1681 | stack. */ | |
c5aa993b JM |
1682 | if (TYPE_CODE (type) == TYPE_CODE_FLT && f_argno < 13) |
1683 | { | |
c906108c | 1684 | |
9f335945 | 1685 | gdb_assert (len <= 8); |
c906108c | 1686 | |
9f335945 KB |
1687 | regcache_cooked_write (regcache, |
1688 | tdep->ppc_fp0_regnum + 1 + f_argno, | |
0fd88904 | 1689 | value_contents (arg)); |
c5aa993b JM |
1690 | ++f_argno; |
1691 | } | |
c906108c | 1692 | |
50fd1280 | 1693 | write_memory (sp + 24 + (ii * 4), value_contents (arg), len); |
c5aa993b JM |
1694 | ii += ((len + 3) & -4) / 4; |
1695 | } | |
c906108c | 1696 | } |
c906108c | 1697 | |
69517000 | 1698 | /* Set the stack pointer. According to the ABI, the SP is meant to |
7aea86e6 AC |
1699 | be set _before_ the corresponding stack space is used. On AIX, |
1700 | this even applies when the target has been completely stopped! | |
1701 | Not doing this can lead to conflicts with the kernel which thinks | |
1702 | that it still has control over this not-yet-allocated stack | |
1703 | region. */ | |
33a7c2fc AC |
1704 | regcache_raw_write_signed (regcache, SP_REGNUM, sp); |
1705 | ||
7aea86e6 | 1706 | /* Set back chain properly. */ |
8ba0209f AM |
1707 | store_unsigned_integer (tmp_buffer, wordsize, saved_sp); |
1708 | write_memory (sp, tmp_buffer, wordsize); | |
7aea86e6 | 1709 | |
e56a0ecc AC |
1710 | /* Point the inferior function call's return address at the dummy's |
1711 | breakpoint. */ | |
1712 | regcache_raw_write_signed (regcache, tdep->ppc_lr_regnum, bp_addr); | |
1713 | ||
794a477a AC |
1714 | /* Set the TOC register, get the value from the objfile reader |
1715 | which, in turn, gets it from the VMAP table. */ | |
1716 | if (rs6000_find_toc_address_hook != NULL) | |
1717 | { | |
1718 | CORE_ADDR tocvalue = (*rs6000_find_toc_address_hook) (func_addr); | |
1719 | regcache_raw_write_signed (regcache, tdep->ppc_toc_regnum, tocvalue); | |
1720 | } | |
1721 | ||
c906108c SS |
1722 | target_store_registers (-1); |
1723 | return sp; | |
1724 | } | |
c906108c | 1725 | |
d217aaed MK |
1726 | static enum return_value_convention |
1727 | rs6000_return_value (struct gdbarch *gdbarch, struct type *valtype, | |
1728 | struct regcache *regcache, gdb_byte *readbuf, | |
1729 | const gdb_byte *writebuf) | |
c906108c | 1730 | { |
ace1378a | 1731 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
d217aaed | 1732 | gdb_byte buf[8]; |
c906108c | 1733 | |
383f0f5b JB |
1734 | /* The calling convention this function implements assumes the |
1735 | processor has floating-point registers. We shouldn't be using it | |
d217aaed | 1736 | on PowerPC variants that lack them. */ |
383f0f5b JB |
1737 | gdb_assert (ppc_floating_point_unit_p (current_gdbarch)); |
1738 | ||
d217aaed MK |
1739 | /* AltiVec extension: Functions that declare a vector data type as a |
1740 | return value place that return value in VR2. */ | |
1741 | if (TYPE_CODE (valtype) == TYPE_CODE_ARRAY && TYPE_VECTOR (valtype) | |
1742 | && TYPE_LENGTH (valtype) == 16) | |
c5aa993b | 1743 | { |
d217aaed MK |
1744 | if (readbuf) |
1745 | regcache_cooked_read (regcache, tdep->ppc_vr0_regnum + 2, readbuf); | |
1746 | if (writebuf) | |
1747 | regcache_cooked_write (regcache, tdep->ppc_vr0_regnum + 2, writebuf); | |
c906108c | 1748 | |
d217aaed | 1749 | return RETURN_VALUE_REGISTER_CONVENTION; |
c5aa993b | 1750 | } |
d217aaed MK |
1751 | |
1752 | /* If the called subprogram returns an aggregate, there exists an | |
1753 | implicit first argument, whose value is the address of a caller- | |
1754 | allocated buffer into which the callee is assumed to store its | |
1755 | return value. All explicit parameters are appropriately | |
1756 | relabeled. */ | |
1757 | if (TYPE_CODE (valtype) == TYPE_CODE_STRUCT | |
1758 | || TYPE_CODE (valtype) == TYPE_CODE_UNION | |
1759 | || TYPE_CODE (valtype) == TYPE_CODE_ARRAY) | |
1760 | return RETURN_VALUE_STRUCT_CONVENTION; | |
1761 | ||
1762 | /* Scalar floating-point values are returned in FPR1 for float or | |
1763 | double, and in FPR1:FPR2 for quadword precision. Fortran | |
1764 | complex*8 and complex*16 are returned in FPR1:FPR2, and | |
1765 | complex*32 is returned in FPR1:FPR4. */ | |
1766 | if (TYPE_CODE (valtype) == TYPE_CODE_FLT | |
1767 | && (TYPE_LENGTH (valtype) == 4 || TYPE_LENGTH (valtype) == 8)) | |
1768 | { | |
1769 | struct type *regtype = register_type (gdbarch, tdep->ppc_fp0_regnum); | |
1770 | gdb_byte regval[8]; | |
1771 | ||
1772 | /* FIXME: kettenis/2007-01-01: Add support for quadword | |
1773 | precision and complex. */ | |
1774 | ||
1775 | if (readbuf) | |
1776 | { | |
1777 | regcache_cooked_read (regcache, tdep->ppc_fp0_regnum + 1, regval); | |
1778 | convert_typed_floating (regval, regtype, readbuf, valtype); | |
1779 | } | |
1780 | if (writebuf) | |
1781 | { | |
1782 | convert_typed_floating (writebuf, valtype, regval, regtype); | |
1783 | regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + 1, regval); | |
1784 | } | |
1785 | ||
1786 | return RETURN_VALUE_REGISTER_CONVENTION; | |
1787 | } | |
1788 | ||
1789 | /* Values of the types int, long, short, pointer, and char (length | |
1790 | is less than or equal to four bytes), as well as bit values of | |
1791 | lengths less than or equal to 32 bits, must be returned right | |
1792 | justified in GPR3 with signed values sign extended and unsigned | |
1793 | values zero extended, as necessary. */ | |
1794 | if (TYPE_LENGTH (valtype) <= tdep->wordsize) | |
ace1378a | 1795 | { |
d217aaed MK |
1796 | if (readbuf) |
1797 | { | |
1798 | ULONGEST regval; | |
1799 | ||
1800 | /* For reading we don't have to worry about sign extension. */ | |
1801 | regcache_cooked_read_unsigned (regcache, tdep->ppc_gp0_regnum + 3, | |
1802 | ®val); | |
1803 | store_unsigned_integer (readbuf, TYPE_LENGTH (valtype), regval); | |
1804 | } | |
1805 | if (writebuf) | |
1806 | { | |
1807 | /* For writing, use unpack_long since that should handle any | |
1808 | required sign extension. */ | |
1809 | regcache_cooked_write_unsigned (regcache, tdep->ppc_gp0_regnum + 3, | |
1810 | unpack_long (valtype, writebuf)); | |
1811 | } | |
1812 | ||
1813 | return RETURN_VALUE_REGISTER_CONVENTION; | |
ace1378a | 1814 | } |
d217aaed MK |
1815 | |
1816 | /* Eight-byte non-floating-point scalar values must be returned in | |
1817 | GPR3:GPR4. */ | |
1818 | ||
1819 | if (TYPE_LENGTH (valtype) == 8) | |
c5aa993b | 1820 | { |
d217aaed MK |
1821 | gdb_assert (TYPE_CODE (valtype) != TYPE_CODE_FLT); |
1822 | gdb_assert (tdep->wordsize == 4); | |
1823 | ||
1824 | if (readbuf) | |
1825 | { | |
1826 | gdb_byte regval[8]; | |
1827 | ||
1828 | regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 3, regval); | |
1829 | regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 4, | |
1830 | regval + 4); | |
1831 | memcpy (readbuf, regval, 8); | |
1832 | } | |
1833 | if (writebuf) | |
1834 | { | |
1835 | regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 3, writebuf); | |
1836 | regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 4, | |
1837 | writebuf + 4); | |
1838 | } | |
1839 | ||
1840 | return RETURN_VALUE_REGISTER_CONVENTION; | |
c906108c | 1841 | } |
d217aaed MK |
1842 | |
1843 | return RETURN_VALUE_STRUCT_CONVENTION; | |
c906108c SS |
1844 | } |
1845 | ||
977adac5 ND |
1846 | /* Return whether handle_inferior_event() should proceed through code |
1847 | starting at PC in function NAME when stepping. | |
1848 | ||
1849 | The AIX -bbigtoc linker option generates functions @FIX0, @FIX1, etc. to | |
1850 | handle memory references that are too distant to fit in instructions | |
1851 | generated by the compiler. For example, if 'foo' in the following | |
1852 | instruction: | |
1853 | ||
1854 | lwz r9,foo(r2) | |
1855 | ||
1856 | is greater than 32767, the linker might replace the lwz with a branch to | |
1857 | somewhere in @FIX1 that does the load in 2 instructions and then branches | |
1858 | back to where execution should continue. | |
1859 | ||
1860 | GDB should silently step over @FIX code, just like AIX dbx does. | |
2ec664f5 MS |
1861 | Unfortunately, the linker uses the "b" instruction for the |
1862 | branches, meaning that the link register doesn't get set. | |
1863 | Therefore, GDB's usual step_over_function () mechanism won't work. | |
977adac5 | 1864 | |
2ec664f5 MS |
1865 | Instead, use the IN_SOLIB_RETURN_TRAMPOLINE and |
1866 | SKIP_TRAMPOLINE_CODE hooks in handle_inferior_event() to skip past | |
1867 | @FIX code. */ | |
977adac5 ND |
1868 | |
1869 | int | |
1870 | rs6000_in_solib_return_trampoline (CORE_ADDR pc, char *name) | |
1871 | { | |
1872 | return name && !strncmp (name, "@FIX", 4); | |
1873 | } | |
1874 | ||
1875 | /* Skip code that the user doesn't want to see when stepping: | |
1876 | ||
1877 | 1. Indirect function calls use a piece of trampoline code to do context | |
1878 | switching, i.e. to set the new TOC table. Skip such code if we are on | |
1879 | its first instruction (as when we have single-stepped to here). | |
1880 | ||
1881 | 2. Skip shared library trampoline code (which is different from | |
c906108c | 1882 | indirect function call trampolines). |
977adac5 ND |
1883 | |
1884 | 3. Skip bigtoc fixup code. | |
1885 | ||
c906108c | 1886 | Result is desired PC to step until, or NULL if we are not in |
977adac5 | 1887 | code that should be skipped. */ |
c906108c SS |
1888 | |
1889 | CORE_ADDR | |
7a78ae4e | 1890 | rs6000_skip_trampoline_code (CORE_ADDR pc) |
c906108c | 1891 | { |
52f0bd74 | 1892 | unsigned int ii, op; |
977adac5 | 1893 | int rel; |
c906108c | 1894 | CORE_ADDR solib_target_pc; |
977adac5 | 1895 | struct minimal_symbol *msymbol; |
c906108c | 1896 | |
c5aa993b JM |
1897 | static unsigned trampoline_code[] = |
1898 | { | |
1899 | 0x800b0000, /* l r0,0x0(r11) */ | |
1900 | 0x90410014, /* st r2,0x14(r1) */ | |
1901 | 0x7c0903a6, /* mtctr r0 */ | |
1902 | 0x804b0004, /* l r2,0x4(r11) */ | |
1903 | 0x816b0008, /* l r11,0x8(r11) */ | |
1904 | 0x4e800420, /* bctr */ | |
1905 | 0x4e800020, /* br */ | |
1906 | 0 | |
c906108c SS |
1907 | }; |
1908 | ||
977adac5 ND |
1909 | /* Check for bigtoc fixup code. */ |
1910 | msymbol = lookup_minimal_symbol_by_pc (pc); | |
2ec664f5 MS |
1911 | if (msymbol |
1912 | && rs6000_in_solib_return_trampoline (pc, | |
1913 | DEPRECATED_SYMBOL_NAME (msymbol))) | |
977adac5 ND |
1914 | { |
1915 | /* Double-check that the third instruction from PC is relative "b". */ | |
1916 | op = read_memory_integer (pc + 8, 4); | |
1917 | if ((op & 0xfc000003) == 0x48000000) | |
1918 | { | |
1919 | /* Extract bits 6-29 as a signed 24-bit relative word address and | |
1920 | add it to the containing PC. */ | |
1921 | rel = ((int)(op << 6) >> 6); | |
1922 | return pc + 8 + rel; | |
1923 | } | |
1924 | } | |
1925 | ||
c906108c SS |
1926 | /* If pc is in a shared library trampoline, return its target. */ |
1927 | solib_target_pc = find_solib_trampoline_target (pc); | |
1928 | if (solib_target_pc) | |
1929 | return solib_target_pc; | |
1930 | ||
c5aa993b JM |
1931 | for (ii = 0; trampoline_code[ii]; ++ii) |
1932 | { | |
1933 | op = read_memory_integer (pc + (ii * 4), 4); | |
1934 | if (op != trampoline_code[ii]) | |
1935 | return 0; | |
1936 | } | |
1937 | ii = read_register (11); /* r11 holds destination addr */ | |
21283beb | 1938 | pc = read_memory_addr (ii, gdbarch_tdep (current_gdbarch)->wordsize); /* (r11) value */ |
c906108c SS |
1939 | return pc; |
1940 | } | |
1941 | ||
7a78ae4e | 1942 | /* Return the size of register REG when words are WORDSIZE bytes long. If REG |
64366f1c | 1943 | isn't available with that word size, return 0. */ |
7a78ae4e ND |
1944 | |
1945 | static int | |
1946 | regsize (const struct reg *reg, int wordsize) | |
1947 | { | |
1948 | return wordsize == 8 ? reg->sz64 : reg->sz32; | |
1949 | } | |
1950 | ||
1951 | /* Return the name of register number N, or null if no such register exists | |
64366f1c | 1952 | in the current architecture. */ |
7a78ae4e | 1953 | |
fa88f677 | 1954 | static const char * |
7a78ae4e ND |
1955 | rs6000_register_name (int n) |
1956 | { | |
21283beb | 1957 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
7a78ae4e ND |
1958 | const struct reg *reg = tdep->regs + n; |
1959 | ||
1960 | if (!regsize (reg, tdep->wordsize)) | |
1961 | return NULL; | |
1962 | return reg->name; | |
1963 | } | |
1964 | ||
7a78ae4e ND |
1965 | /* Return the GDB type object for the "standard" data type |
1966 | of data in register N. */ | |
1967 | ||
1968 | static struct type * | |
691d145a | 1969 | rs6000_register_type (struct gdbarch *gdbarch, int n) |
7a78ae4e | 1970 | { |
691d145a | 1971 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
7a78ae4e ND |
1972 | const struct reg *reg = tdep->regs + n; |
1973 | ||
1fcc0bb8 EZ |
1974 | if (reg->fpr) |
1975 | return builtin_type_double; | |
1976 | else | |
1977 | { | |
1978 | int size = regsize (reg, tdep->wordsize); | |
1979 | switch (size) | |
1980 | { | |
449a5da4 AC |
1981 | case 0: |
1982 | return builtin_type_int0; | |
1983 | case 4: | |
ed6edd9b | 1984 | return builtin_type_uint32; |
1fcc0bb8 | 1985 | case 8: |
c8001721 EZ |
1986 | if (tdep->ppc_ev0_regnum <= n && n <= tdep->ppc_ev31_regnum) |
1987 | return builtin_type_vec64; | |
1988 | else | |
ed6edd9b | 1989 | return builtin_type_uint64; |
1fcc0bb8 EZ |
1990 | break; |
1991 | case 16: | |
08cf96df | 1992 | return builtin_type_vec128; |
1fcc0bb8 EZ |
1993 | break; |
1994 | default: | |
e2e0b3e5 | 1995 | internal_error (__FILE__, __LINE__, _("Register %d size %d unknown"), |
449a5da4 | 1996 | n, size); |
1fcc0bb8 EZ |
1997 | } |
1998 | } | |
7a78ae4e ND |
1999 | } |
2000 | ||
c44ca51c AC |
2001 | /* Is REGNUM a member of REGGROUP? */ |
2002 | static int | |
2003 | rs6000_register_reggroup_p (struct gdbarch *gdbarch, int regnum, | |
2004 | struct reggroup *group) | |
2005 | { | |
2006 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
2007 | int float_p; | |
2008 | int vector_p; | |
2009 | int general_p; | |
2010 | ||
2011 | if (REGISTER_NAME (regnum) == NULL | |
2012 | || *REGISTER_NAME (regnum) == '\0') | |
2013 | return 0; | |
2014 | if (group == all_reggroup) | |
2015 | return 1; | |
2016 | ||
2017 | float_p = (regnum == tdep->ppc_fpscr_regnum | |
2018 | || (regnum >= tdep->ppc_fp0_regnum | |
2019 | && regnum < tdep->ppc_fp0_regnum + 32)); | |
2020 | if (group == float_reggroup) | |
2021 | return float_p; | |
2022 | ||
826d5376 PG |
2023 | vector_p = ((tdep->ppc_vr0_regnum >= 0 |
2024 | && regnum >= tdep->ppc_vr0_regnum | |
c44ca51c | 2025 | && regnum < tdep->ppc_vr0_regnum + 32) |
826d5376 PG |
2026 | || (tdep->ppc_ev0_regnum >= 0 |
2027 | && regnum >= tdep->ppc_ev0_regnum | |
c44ca51c | 2028 | && regnum < tdep->ppc_ev0_regnum + 32) |
3bf49e1b | 2029 | || regnum == tdep->ppc_vrsave_regnum - 1 /* vscr */ |
c44ca51c AC |
2030 | || regnum == tdep->ppc_vrsave_regnum |
2031 | || regnum == tdep->ppc_acc_regnum | |
2032 | || regnum == tdep->ppc_spefscr_regnum); | |
2033 | if (group == vector_reggroup) | |
2034 | return vector_p; | |
2035 | ||
2036 | /* Note that PS aka MSR isn't included - it's a system register (and | |
2037 | besides, due to GCC's CFI foobar you do not want to restore | |
2038 | it). */ | |
2039 | general_p = ((regnum >= tdep->ppc_gp0_regnum | |
2040 | && regnum < tdep->ppc_gp0_regnum + 32) | |
2041 | || regnum == tdep->ppc_toc_regnum | |
2042 | || regnum == tdep->ppc_cr_regnum | |
2043 | || regnum == tdep->ppc_lr_regnum | |
2044 | || regnum == tdep->ppc_ctr_regnum | |
2045 | || regnum == tdep->ppc_xer_regnum | |
2046 | || regnum == PC_REGNUM); | |
2047 | if (group == general_reggroup) | |
2048 | return general_p; | |
2049 | ||
2050 | if (group == save_reggroup || group == restore_reggroup) | |
2051 | return general_p || vector_p || float_p; | |
2052 | ||
2053 | return 0; | |
2054 | } | |
2055 | ||
691d145a | 2056 | /* The register format for RS/6000 floating point registers is always |
64366f1c | 2057 | double, we need a conversion if the memory format is float. */ |
7a78ae4e ND |
2058 | |
2059 | static int | |
691d145a | 2060 | rs6000_convert_register_p (int regnum, struct type *type) |
7a78ae4e | 2061 | { |
691d145a JB |
2062 | const struct reg *reg = gdbarch_tdep (current_gdbarch)->regs + regnum; |
2063 | ||
2064 | return (reg->fpr | |
2065 | && TYPE_CODE (type) == TYPE_CODE_FLT | |
2066 | && TYPE_LENGTH (type) != TYPE_LENGTH (builtin_type_double)); | |
7a78ae4e ND |
2067 | } |
2068 | ||
7a78ae4e | 2069 | static void |
691d145a JB |
2070 | rs6000_register_to_value (struct frame_info *frame, |
2071 | int regnum, | |
2072 | struct type *type, | |
50fd1280 | 2073 | gdb_byte *to) |
7a78ae4e | 2074 | { |
691d145a | 2075 | const struct reg *reg = gdbarch_tdep (current_gdbarch)->regs + regnum; |
50fd1280 | 2076 | gdb_byte from[MAX_REGISTER_SIZE]; |
691d145a JB |
2077 | |
2078 | gdb_assert (reg->fpr); | |
2079 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_FLT); | |
7a78ae4e | 2080 | |
691d145a JB |
2081 | get_frame_register (frame, regnum, from); |
2082 | convert_typed_floating (from, builtin_type_double, to, type); | |
2083 | } | |
7a292a7a | 2084 | |
7a78ae4e | 2085 | static void |
691d145a JB |
2086 | rs6000_value_to_register (struct frame_info *frame, |
2087 | int regnum, | |
2088 | struct type *type, | |
50fd1280 | 2089 | const gdb_byte *from) |
7a78ae4e | 2090 | { |
691d145a | 2091 | const struct reg *reg = gdbarch_tdep (current_gdbarch)->regs + regnum; |
50fd1280 | 2092 | gdb_byte to[MAX_REGISTER_SIZE]; |
691d145a JB |
2093 | |
2094 | gdb_assert (reg->fpr); | |
2095 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_FLT); | |
2096 | ||
2097 | convert_typed_floating (from, type, to, builtin_type_double); | |
2098 | put_frame_register (frame, regnum, to); | |
7a78ae4e | 2099 | } |
c906108c | 2100 | |
6ced10dd JB |
2101 | /* Move SPE vector register values between a 64-bit buffer and the two |
2102 | 32-bit raw register halves in a regcache. This function handles | |
2103 | both splitting a 64-bit value into two 32-bit halves, and joining | |
2104 | two halves into a whole 64-bit value, depending on the function | |
2105 | passed as the MOVE argument. | |
2106 | ||
2107 | EV_REG must be the number of an SPE evN vector register --- a | |
2108 | pseudoregister. REGCACHE must be a regcache, and BUFFER must be a | |
2109 | 64-bit buffer. | |
2110 | ||
2111 | Call MOVE once for each 32-bit half of that register, passing | |
2112 | REGCACHE, the number of the raw register corresponding to that | |
2113 | half, and the address of the appropriate half of BUFFER. | |
2114 | ||
2115 | For example, passing 'regcache_raw_read' as the MOVE function will | |
2116 | fill BUFFER with the full 64-bit contents of EV_REG. Or, passing | |
2117 | 'regcache_raw_supply' will supply the contents of BUFFER to the | |
2118 | appropriate pair of raw registers in REGCACHE. | |
2119 | ||
2120 | You may need to cast away some 'const' qualifiers when passing | |
2121 | MOVE, since this function can't tell at compile-time which of | |
2122 | REGCACHE or BUFFER is acting as the source of the data. If C had | |
2123 | co-variant type qualifiers, ... */ | |
2124 | static void | |
2125 | e500_move_ev_register (void (*move) (struct regcache *regcache, | |
50fd1280 | 2126 | int regnum, gdb_byte *buf), |
6ced10dd | 2127 | struct regcache *regcache, int ev_reg, |
50fd1280 | 2128 | gdb_byte *buffer) |
6ced10dd JB |
2129 | { |
2130 | struct gdbarch *arch = get_regcache_arch (regcache); | |
2131 | struct gdbarch_tdep *tdep = gdbarch_tdep (arch); | |
2132 | int reg_index; | |
50fd1280 | 2133 | gdb_byte *byte_buffer = buffer; |
6ced10dd JB |
2134 | |
2135 | gdb_assert (tdep->ppc_ev0_regnum <= ev_reg | |
2136 | && ev_reg < tdep->ppc_ev0_regnum + ppc_num_gprs); | |
2137 | ||
2138 | reg_index = ev_reg - tdep->ppc_ev0_regnum; | |
2139 | ||
2140 | if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) | |
2141 | { | |
2142 | move (regcache, tdep->ppc_ev0_upper_regnum + reg_index, byte_buffer); | |
2143 | move (regcache, tdep->ppc_gp0_regnum + reg_index, byte_buffer + 4); | |
2144 | } | |
2145 | else | |
2146 | { | |
2147 | move (regcache, tdep->ppc_gp0_regnum + reg_index, byte_buffer); | |
2148 | move (regcache, tdep->ppc_ev0_upper_regnum + reg_index, byte_buffer + 4); | |
2149 | } | |
2150 | } | |
2151 | ||
c8001721 EZ |
2152 | static void |
2153 | e500_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache, | |
50fd1280 | 2154 | int reg_nr, gdb_byte *buffer) |
c8001721 | 2155 | { |
6ced10dd | 2156 | struct gdbarch *regcache_arch = get_regcache_arch (regcache); |
c8001721 EZ |
2157 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
2158 | ||
6ced10dd JB |
2159 | gdb_assert (regcache_arch == gdbarch); |
2160 | ||
2161 | if (tdep->ppc_ev0_regnum <= reg_nr | |
2162 | && reg_nr < tdep->ppc_ev0_regnum + ppc_num_gprs) | |
2163 | e500_move_ev_register (regcache_raw_read, regcache, reg_nr, buffer); | |
2164 | else | |
a44bddec | 2165 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 AC |
2166 | _("e500_pseudo_register_read: " |
2167 | "called on unexpected register '%s' (%d)"), | |
a44bddec | 2168 | gdbarch_register_name (gdbarch, reg_nr), reg_nr); |
c8001721 EZ |
2169 | } |
2170 | ||
2171 | static void | |
2172 | e500_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache, | |
50fd1280 | 2173 | int reg_nr, const gdb_byte *buffer) |
c8001721 | 2174 | { |
6ced10dd | 2175 | struct gdbarch *regcache_arch = get_regcache_arch (regcache); |
c8001721 EZ |
2176 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
2177 | ||
6ced10dd JB |
2178 | gdb_assert (regcache_arch == gdbarch); |
2179 | ||
2180 | if (tdep->ppc_ev0_regnum <= reg_nr | |
2181 | && reg_nr < tdep->ppc_ev0_regnum + ppc_num_gprs) | |
50fd1280 | 2182 | e500_move_ev_register ((void (*) (struct regcache *, int, gdb_byte *)) |
6ced10dd | 2183 | regcache_raw_write, |
50fd1280 | 2184 | regcache, reg_nr, (gdb_byte *) buffer); |
6ced10dd | 2185 | else |
a44bddec | 2186 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 AC |
2187 | _("e500_pseudo_register_read: " |
2188 | "called on unexpected register '%s' (%d)"), | |
a44bddec | 2189 | gdbarch_register_name (gdbarch, reg_nr), reg_nr); |
6ced10dd JB |
2190 | } |
2191 | ||
2192 | /* The E500 needs a custom reggroup function: it has anonymous raw | |
2193 | registers, and default_register_reggroup_p assumes that anonymous | |
2194 | registers are not members of any reggroup. */ | |
2195 | static int | |
2196 | e500_register_reggroup_p (struct gdbarch *gdbarch, | |
2197 | int regnum, | |
2198 | struct reggroup *group) | |
2199 | { | |
2200 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
2201 | ||
2202 | /* The save and restore register groups need to include the | |
2203 | upper-half registers, even though they're anonymous. */ | |
2204 | if ((group == save_reggroup | |
2205 | || group == restore_reggroup) | |
2206 | && (tdep->ppc_ev0_upper_regnum <= regnum | |
2207 | && regnum < tdep->ppc_ev0_upper_regnum + ppc_num_gprs)) | |
2208 | return 1; | |
2209 | ||
2210 | /* In all other regards, the default reggroup definition is fine. */ | |
2211 | return default_register_reggroup_p (gdbarch, regnum, group); | |
c8001721 EZ |
2212 | } |
2213 | ||
18ed0c4e | 2214 | /* Convert a DBX STABS register number to a GDB register number. */ |
c8001721 | 2215 | static int |
18ed0c4e | 2216 | rs6000_stab_reg_to_regnum (int num) |
c8001721 | 2217 | { |
9f744501 | 2218 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
c8001721 | 2219 | |
9f744501 JB |
2220 | if (0 <= num && num <= 31) |
2221 | return tdep->ppc_gp0_regnum + num; | |
2222 | else if (32 <= num && num <= 63) | |
383f0f5b JB |
2223 | /* FIXME: jimb/2004-05-05: What should we do when the debug info |
2224 | specifies registers the architecture doesn't have? Our | |
2225 | callers don't check the value we return. */ | |
366f009f | 2226 | return tdep->ppc_fp0_regnum + (num - 32); |
18ed0c4e JB |
2227 | else if (77 <= num && num <= 108) |
2228 | return tdep->ppc_vr0_regnum + (num - 77); | |
9f744501 JB |
2229 | else if (1200 <= num && num < 1200 + 32) |
2230 | return tdep->ppc_ev0_regnum + (num - 1200); | |
2231 | else | |
2232 | switch (num) | |
2233 | { | |
2234 | case 64: | |
2235 | return tdep->ppc_mq_regnum; | |
2236 | case 65: | |
2237 | return tdep->ppc_lr_regnum; | |
2238 | case 66: | |
2239 | return tdep->ppc_ctr_regnum; | |
2240 | case 76: | |
2241 | return tdep->ppc_xer_regnum; | |
2242 | case 109: | |
2243 | return tdep->ppc_vrsave_regnum; | |
18ed0c4e JB |
2244 | case 110: |
2245 | return tdep->ppc_vrsave_regnum - 1; /* vscr */ | |
867e2dc5 | 2246 | case 111: |
18ed0c4e | 2247 | return tdep->ppc_acc_regnum; |
867e2dc5 | 2248 | case 112: |
18ed0c4e | 2249 | return tdep->ppc_spefscr_regnum; |
9f744501 JB |
2250 | default: |
2251 | return num; | |
2252 | } | |
18ed0c4e | 2253 | } |
9f744501 | 2254 | |
9f744501 | 2255 | |
18ed0c4e JB |
2256 | /* Convert a Dwarf 2 register number to a GDB register number. */ |
2257 | static int | |
2258 | rs6000_dwarf2_reg_to_regnum (int num) | |
2259 | { | |
2260 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); | |
9f744501 | 2261 | |
18ed0c4e JB |
2262 | if (0 <= num && num <= 31) |
2263 | return tdep->ppc_gp0_regnum + num; | |
2264 | else if (32 <= num && num <= 63) | |
2265 | /* FIXME: jimb/2004-05-05: What should we do when the debug info | |
2266 | specifies registers the architecture doesn't have? Our | |
2267 | callers don't check the value we return. */ | |
2268 | return tdep->ppc_fp0_regnum + (num - 32); | |
2269 | else if (1124 <= num && num < 1124 + 32) | |
2270 | return tdep->ppc_vr0_regnum + (num - 1124); | |
2271 | else if (1200 <= num && num < 1200 + 32) | |
2272 | return tdep->ppc_ev0_regnum + (num - 1200); | |
2273 | else | |
2274 | switch (num) | |
2275 | { | |
2276 | case 67: | |
2277 | return tdep->ppc_vrsave_regnum - 1; /* vscr */ | |
2278 | case 99: | |
2279 | return tdep->ppc_acc_regnum; | |
2280 | case 100: | |
2281 | return tdep->ppc_mq_regnum; | |
2282 | case 101: | |
2283 | return tdep->ppc_xer_regnum; | |
2284 | case 108: | |
2285 | return tdep->ppc_lr_regnum; | |
2286 | case 109: | |
2287 | return tdep->ppc_ctr_regnum; | |
2288 | case 356: | |
2289 | return tdep->ppc_vrsave_regnum; | |
2290 | case 612: | |
2291 | return tdep->ppc_spefscr_regnum; | |
2292 | default: | |
2293 | return num; | |
2294 | } | |
2188cbdd EZ |
2295 | } |
2296 | ||
c906108c | 2297 | \f |
e2d0e7eb | 2298 | /* Support for CONVERT_FROM_FUNC_PTR_ADDR (ARCH, ADDR, TARG). |
7a78ae4e ND |
2299 | |
2300 | Usually a function pointer's representation is simply the address | |
2301 | of the function. On the RS/6000 however, a function pointer is | |
8ba0209f | 2302 | represented by a pointer to an OPD entry. This OPD entry contains |
7a78ae4e ND |
2303 | three words, the first word is the address of the function, the |
2304 | second word is the TOC pointer (r2), and the third word is the | |
2305 | static chain value. Throughout GDB it is currently assumed that a | |
2306 | function pointer contains the address of the function, which is not | |
2307 | easy to fix. In addition, the conversion of a function address to | |
8ba0209f | 2308 | a function pointer would require allocation of an OPD entry in the |
7a78ae4e ND |
2309 | inferior's memory space, with all its drawbacks. To be able to |
2310 | call C++ virtual methods in the inferior (which are called via | |
f517ea4e | 2311 | function pointers), find_function_addr uses this function to get the |
7a78ae4e ND |
2312 | function address from a function pointer. */ |
2313 | ||
f517ea4e PS |
2314 | /* Return real function address if ADDR (a function pointer) is in the data |
2315 | space and is therefore a special function pointer. */ | |
c906108c | 2316 | |
b9362cc7 | 2317 | static CORE_ADDR |
e2d0e7eb AC |
2318 | rs6000_convert_from_func_ptr_addr (struct gdbarch *gdbarch, |
2319 | CORE_ADDR addr, | |
2320 | struct target_ops *targ) | |
c906108c SS |
2321 | { |
2322 | struct obj_section *s; | |
2323 | ||
2324 | s = find_pc_section (addr); | |
2325 | if (s && s->the_bfd_section->flags & SEC_CODE) | |
7a78ae4e | 2326 | return addr; |
c906108c | 2327 | |
7a78ae4e | 2328 | /* ADDR is in the data space, so it's a special function pointer. */ |
21283beb | 2329 | return read_memory_addr (addr, gdbarch_tdep (current_gdbarch)->wordsize); |
c906108c | 2330 | } |
c906108c | 2331 | \f |
c5aa993b | 2332 | |
7a78ae4e | 2333 | /* Handling the various POWER/PowerPC variants. */ |
c906108c SS |
2334 | |
2335 | ||
7a78ae4e ND |
2336 | /* The arrays here called registers_MUMBLE hold information about available |
2337 | registers. | |
c906108c SS |
2338 | |
2339 | For each family of PPC variants, I've tried to isolate out the | |
2340 | common registers and put them up front, so that as long as you get | |
2341 | the general family right, GDB will correctly identify the registers | |
2342 | common to that family. The common register sets are: | |
2343 | ||
2344 | For the 60x family: hid0 hid1 iabr dabr pir | |
2345 | ||
2346 | For the 505 and 860 family: eie eid nri | |
2347 | ||
2348 | For the 403 and 403GC: icdbdr esr dear evpr cdbcr tsr tcr pit tbhi | |
c5aa993b JM |
2349 | tblo srr2 srr3 dbsr dbcr iac1 iac2 dac1 dac2 dccr iccr pbl1 |
2350 | pbu1 pbl2 pbu2 | |
c906108c SS |
2351 | |
2352 | Most of these register groups aren't anything formal. I arrived at | |
2353 | them by looking at the registers that occurred in more than one | |
6f5987a6 KB |
2354 | processor. |
2355 | ||
2356 | Note: kevinb/2002-04-30: Support for the fpscr register was added | |
2357 | during April, 2002. Slot 70 is being used for PowerPC and slot 71 | |
2358 | for Power. For PowerPC, slot 70 was unused and was already in the | |
2359 | PPC_UISA_SPRS which is ideally where fpscr should go. For Power, | |
2360 | slot 70 was being used for "mq", so the next available slot (71) | |
2361 | was chosen. It would have been nice to be able to make the | |
2362 | register numbers the same across processor cores, but this wasn't | |
2363 | possible without either 1) renumbering some registers for some | |
2364 | processors or 2) assigning fpscr to a really high slot that's | |
2365 | larger than any current register number. Doing (1) is bad because | |
2366 | existing stubs would break. Doing (2) is undesirable because it | |
2367 | would introduce a really large gap between fpscr and the rest of | |
2368 | the registers for most processors. */ | |
7a78ae4e | 2369 | |
64366f1c | 2370 | /* Convenience macros for populating register arrays. */ |
7a78ae4e | 2371 | |
64366f1c | 2372 | /* Within another macro, convert S to a string. */ |
7a78ae4e ND |
2373 | |
2374 | #define STR(s) #s | |
2375 | ||
2376 | /* Return a struct reg defining register NAME that's 32 bits on 32-bit systems | |
64366f1c | 2377 | and 64 bits on 64-bit systems. */ |
13ac140c | 2378 | #define R(name) { STR(name), 4, 8, 0, 0, -1 } |
7a78ae4e ND |
2379 | |
2380 | /* Return a struct reg defining register NAME that's 32 bits on all | |
64366f1c | 2381 | systems. */ |
13ac140c | 2382 | #define R4(name) { STR(name), 4, 4, 0, 0, -1 } |
7a78ae4e ND |
2383 | |
2384 | /* Return a struct reg defining register NAME that's 64 bits on all | |
64366f1c | 2385 | systems. */ |
13ac140c | 2386 | #define R8(name) { STR(name), 8, 8, 0, 0, -1 } |
7a78ae4e | 2387 | |
1fcc0bb8 | 2388 | /* Return a struct reg defining register NAME that's 128 bits on all |
64366f1c | 2389 | systems. */ |
13ac140c | 2390 | #define R16(name) { STR(name), 16, 16, 0, 0, -1 } |
1fcc0bb8 | 2391 | |
64366f1c | 2392 | /* Return a struct reg defining floating-point register NAME. */ |
13ac140c | 2393 | #define F(name) { STR(name), 8, 8, 1, 0, -1 } |
489461e2 | 2394 | |
6ced10dd JB |
2395 | /* Return a struct reg defining a pseudo register NAME that is 64 bits |
2396 | long on all systems. */ | |
2397 | #define P8(name) { STR(name), 8, 8, 0, 1, -1 } | |
7a78ae4e ND |
2398 | |
2399 | /* Return a struct reg defining register NAME that's 32 bits on 32-bit | |
64366f1c | 2400 | systems and that doesn't exist on 64-bit systems. */ |
13ac140c | 2401 | #define R32(name) { STR(name), 4, 0, 0, 0, -1 } |
7a78ae4e ND |
2402 | |
2403 | /* Return a struct reg defining register NAME that's 64 bits on 64-bit | |
64366f1c | 2404 | systems and that doesn't exist on 32-bit systems. */ |
13ac140c | 2405 | #define R64(name) { STR(name), 0, 8, 0, 0, -1 } |
7a78ae4e | 2406 | |
64366f1c | 2407 | /* Return a struct reg placeholder for a register that doesn't exist. */ |
13ac140c | 2408 | #define R0 { 0, 0, 0, 0, 0, -1 } |
7a78ae4e | 2409 | |
6ced10dd JB |
2410 | /* Return a struct reg defining an anonymous raw register that's 32 |
2411 | bits on all systems. */ | |
2412 | #define A4 { 0, 4, 4, 0, 0, -1 } | |
2413 | ||
13ac140c JB |
2414 | /* Return a struct reg defining an SPR named NAME that is 32 bits on |
2415 | 32-bit systems and 64 bits on 64-bit systems. */ | |
2416 | #define S(name) { STR(name), 4, 8, 0, 0, ppc_spr_ ## name } | |
2417 | ||
2418 | /* Return a struct reg defining an SPR named NAME that is 32 bits on | |
2419 | all systems. */ | |
2420 | #define S4(name) { STR(name), 4, 4, 0, 0, ppc_spr_ ## name } | |
2421 | ||
2422 | /* Return a struct reg defining an SPR named NAME that is 32 bits on | |
2423 | all systems, and whose SPR number is NUMBER. */ | |
2424 | #define SN4(name, number) { STR(name), 4, 4, 0, 0, (number) } | |
2425 | ||
2426 | /* Return a struct reg defining an SPR named NAME that's 64 bits on | |
2427 | 64-bit systems and that doesn't exist on 32-bit systems. */ | |
2428 | #define S64(name) { STR(name), 0, 8, 0, 0, ppc_spr_ ## name } | |
2429 | ||
7a78ae4e ND |
2430 | /* UISA registers common across all architectures, including POWER. */ |
2431 | ||
2432 | #define COMMON_UISA_REGS \ | |
2433 | /* 0 */ R(r0), R(r1), R(r2), R(r3), R(r4), R(r5), R(r6), R(r7), \ | |
2434 | /* 8 */ R(r8), R(r9), R(r10),R(r11),R(r12),R(r13),R(r14),R(r15), \ | |
2435 | /* 16 */ R(r16),R(r17),R(r18),R(r19),R(r20),R(r21),R(r22),R(r23), \ | |
2436 | /* 24 */ R(r24),R(r25),R(r26),R(r27),R(r28),R(r29),R(r30),R(r31), \ | |
2437 | /* 32 */ F(f0), F(f1), F(f2), F(f3), F(f4), F(f5), F(f6), F(f7), \ | |
2438 | /* 40 */ F(f8), F(f9), F(f10),F(f11),F(f12),F(f13),F(f14),F(f15), \ | |
2439 | /* 48 */ F(f16),F(f17),F(f18),F(f19),F(f20),F(f21),F(f22),F(f23), \ | |
2440 | /* 56 */ F(f24),F(f25),F(f26),F(f27),F(f28),F(f29),F(f30),F(f31), \ | |
2441 | /* 64 */ R(pc), R(ps) | |
2442 | ||
2443 | /* UISA-level SPRs for PowerPC. */ | |
2444 | #define PPC_UISA_SPRS \ | |
13ac140c | 2445 | /* 66 */ R4(cr), S(lr), S(ctr), S4(xer), R4(fpscr) |
7a78ae4e | 2446 | |
c8001721 EZ |
2447 | /* UISA-level SPRs for PowerPC without floating point support. */ |
2448 | #define PPC_UISA_NOFP_SPRS \ | |
13ac140c | 2449 | /* 66 */ R4(cr), S(lr), S(ctr), S4(xer), R0 |
c8001721 | 2450 | |
7a78ae4e ND |
2451 | /* Segment registers, for PowerPC. */ |
2452 | #define PPC_SEGMENT_REGS \ | |
2453 | /* 71 */ R32(sr0), R32(sr1), R32(sr2), R32(sr3), \ | |
2454 | /* 75 */ R32(sr4), R32(sr5), R32(sr6), R32(sr7), \ | |
2455 | /* 79 */ R32(sr8), R32(sr9), R32(sr10), R32(sr11), \ | |
2456 | /* 83 */ R32(sr12), R32(sr13), R32(sr14), R32(sr15) | |
2457 | ||
2458 | /* OEA SPRs for PowerPC. */ | |
2459 | #define PPC_OEA_SPRS \ | |
13ac140c JB |
2460 | /* 87 */ S4(pvr), \ |
2461 | /* 88 */ S(ibat0u), S(ibat0l), S(ibat1u), S(ibat1l), \ | |
2462 | /* 92 */ S(ibat2u), S(ibat2l), S(ibat3u), S(ibat3l), \ | |
2463 | /* 96 */ S(dbat0u), S(dbat0l), S(dbat1u), S(dbat1l), \ | |
2464 | /* 100 */ S(dbat2u), S(dbat2l), S(dbat3u), S(dbat3l), \ | |
2465 | /* 104 */ S(sdr1), S64(asr), S(dar), S4(dsisr), \ | |
2466 | /* 108 */ S(sprg0), S(sprg1), S(sprg2), S(sprg3), \ | |
2467 | /* 112 */ S(srr0), S(srr1), S(tbl), S(tbu), \ | |
2468 | /* 116 */ S4(dec), S(dabr), S4(ear) | |
7a78ae4e | 2469 | |
64366f1c | 2470 | /* AltiVec registers. */ |
1fcc0bb8 EZ |
2471 | #define PPC_ALTIVEC_REGS \ |
2472 | /*119*/R16(vr0), R16(vr1), R16(vr2), R16(vr3), R16(vr4), R16(vr5), R16(vr6), R16(vr7), \ | |
2473 | /*127*/R16(vr8), R16(vr9), R16(vr10),R16(vr11),R16(vr12),R16(vr13),R16(vr14),R16(vr15), \ | |
2474 | /*135*/R16(vr16),R16(vr17),R16(vr18),R16(vr19),R16(vr20),R16(vr21),R16(vr22),R16(vr23), \ | |
2475 | /*143*/R16(vr24),R16(vr25),R16(vr26),R16(vr27),R16(vr28),R16(vr29),R16(vr30),R16(vr31), \ | |
2476 | /*151*/R4(vscr), R4(vrsave) | |
2477 | ||
c8001721 | 2478 | |
6ced10dd JB |
2479 | /* On machines supporting the SPE APU, the general-purpose registers |
2480 | are 64 bits long. There are SIMD vector instructions to treat them | |
2481 | as pairs of floats, but the rest of the instruction set treats them | |
2482 | as 32-bit registers, and only operates on their lower halves. | |
2483 | ||
2484 | In the GDB regcache, we treat their high and low halves as separate | |
2485 | registers. The low halves we present as the general-purpose | |
2486 | registers, and then we have pseudo-registers that stitch together | |
2487 | the upper and lower halves and present them as pseudo-registers. */ | |
2488 | ||
2489 | /* SPE GPR lower halves --- raw registers. */ | |
2490 | #define PPC_SPE_GP_REGS \ | |
2491 | /* 0 */ R4(r0), R4(r1), R4(r2), R4(r3), R4(r4), R4(r5), R4(r6), R4(r7), \ | |
2492 | /* 8 */ R4(r8), R4(r9), R4(r10),R4(r11),R4(r12),R4(r13),R4(r14),R4(r15), \ | |
2493 | /* 16 */ R4(r16),R4(r17),R4(r18),R4(r19),R4(r20),R4(r21),R4(r22),R4(r23), \ | |
2494 | /* 24 */ R4(r24),R4(r25),R4(r26),R4(r27),R4(r28),R4(r29),R4(r30),R4(r31) | |
2495 | ||
2496 | /* SPE GPR upper halves --- anonymous raw registers. */ | |
2497 | #define PPC_SPE_UPPER_GP_REGS \ | |
2498 | /* 0 */ A4, A4, A4, A4, A4, A4, A4, A4, \ | |
2499 | /* 8 */ A4, A4, A4, A4, A4, A4, A4, A4, \ | |
2500 | /* 16 */ A4, A4, A4, A4, A4, A4, A4, A4, \ | |
2501 | /* 24 */ A4, A4, A4, A4, A4, A4, A4, A4 | |
2502 | ||
2503 | /* SPE GPR vector registers --- pseudo registers based on underlying | |
2504 | gprs and the anonymous upper half raw registers. */ | |
2505 | #define PPC_EV_PSEUDO_REGS \ | |
2506 | /* 0*/P8(ev0), P8(ev1), P8(ev2), P8(ev3), P8(ev4), P8(ev5), P8(ev6), P8(ev7), \ | |
2507 | /* 8*/P8(ev8), P8(ev9), P8(ev10),P8(ev11),P8(ev12),P8(ev13),P8(ev14),P8(ev15),\ | |
2508 | /*16*/P8(ev16),P8(ev17),P8(ev18),P8(ev19),P8(ev20),P8(ev21),P8(ev22),P8(ev23),\ | |
2509 | /*24*/P8(ev24),P8(ev25),P8(ev26),P8(ev27),P8(ev28),P8(ev29),P8(ev30),P8(ev31) | |
c8001721 | 2510 | |
7a78ae4e | 2511 | /* IBM POWER (pre-PowerPC) architecture, user-level view. We only cover |
64366f1c | 2512 | user-level SPR's. */ |
7a78ae4e | 2513 | static const struct reg registers_power[] = |
c906108c | 2514 | { |
7a78ae4e | 2515 | COMMON_UISA_REGS, |
13ac140c | 2516 | /* 66 */ R4(cnd), S(lr), S(cnt), S4(xer), S4(mq), |
e3f36dbd | 2517 | /* 71 */ R4(fpscr) |
c906108c SS |
2518 | }; |
2519 | ||
7a78ae4e | 2520 | /* PowerPC UISA - a PPC processor as viewed by user-level code. A UISA-only |
64366f1c | 2521 | view of the PowerPC. */ |
7a78ae4e | 2522 | static const struct reg registers_powerpc[] = |
c906108c | 2523 | { |
7a78ae4e | 2524 | COMMON_UISA_REGS, |
1fcc0bb8 EZ |
2525 | PPC_UISA_SPRS, |
2526 | PPC_ALTIVEC_REGS | |
c906108c SS |
2527 | }; |
2528 | ||
13ac140c JB |
2529 | /* IBM PowerPC 403. |
2530 | ||
2531 | Some notes about the "tcr" special-purpose register: | |
2532 | - On the 403 and 403GC, SPR 986 is named "tcr", and it controls the | |
2533 | 403's programmable interval timer, fixed interval timer, and | |
2534 | watchdog timer. | |
2535 | - On the 602, SPR 984 is named "tcr", and it controls the 602's | |
2536 | watchdog timer, and nothing else. | |
2537 | ||
2538 | Some of the fields are similar between the two, but they're not | |
2539 | compatible with each other. Since the two variants have different | |
2540 | registers, with different numbers, but the same name, we can't | |
2541 | splice the register name to get the SPR number. */ | |
7a78ae4e | 2542 | static const struct reg registers_403[] = |
c5aa993b | 2543 | { |
7a78ae4e ND |
2544 | COMMON_UISA_REGS, |
2545 | PPC_UISA_SPRS, | |
2546 | PPC_SEGMENT_REGS, | |
2547 | PPC_OEA_SPRS, | |
13ac140c JB |
2548 | /* 119 */ S(icdbdr), S(esr), S(dear), S(evpr), |
2549 | /* 123 */ S(cdbcr), S(tsr), SN4(tcr, ppc_spr_403_tcr), S(pit), | |
2550 | /* 127 */ S(tbhi), S(tblo), S(srr2), S(srr3), | |
2551 | /* 131 */ S(dbsr), S(dbcr), S(iac1), S(iac2), | |
2552 | /* 135 */ S(dac1), S(dac2), S(dccr), S(iccr), | |
2553 | /* 139 */ S(pbl1), S(pbu1), S(pbl2), S(pbu2) | |
c906108c SS |
2554 | }; |
2555 | ||
13ac140c JB |
2556 | /* IBM PowerPC 403GC. |
2557 | See the comments about 'tcr' for the 403, above. */ | |
7a78ae4e | 2558 | static const struct reg registers_403GC[] = |
c5aa993b | 2559 | { |
7a78ae4e ND |
2560 | COMMON_UISA_REGS, |
2561 | PPC_UISA_SPRS, | |
2562 | PPC_SEGMENT_REGS, | |
2563 | PPC_OEA_SPRS, | |
13ac140c JB |
2564 | /* 119 */ S(icdbdr), S(esr), S(dear), S(evpr), |
2565 | /* 123 */ S(cdbcr), S(tsr), SN4(tcr, ppc_spr_403_tcr), S(pit), | |
2566 | /* 127 */ S(tbhi), S(tblo), S(srr2), S(srr3), | |
2567 | /* 131 */ S(dbsr), S(dbcr), S(iac1), S(iac2), | |
2568 | /* 135 */ S(dac1), S(dac2), S(dccr), S(iccr), | |
2569 | /* 139 */ S(pbl1), S(pbu1), S(pbl2), S(pbu2), | |
2570 | /* 143 */ S(zpr), S(pid), S(sgr), S(dcwr), | |
2571 | /* 147 */ S(tbhu), S(tblu) | |
c906108c SS |
2572 | }; |
2573 | ||
64366f1c | 2574 | /* Motorola PowerPC 505. */ |
7a78ae4e | 2575 | static const struct reg registers_505[] = |
c5aa993b | 2576 | { |
7a78ae4e ND |
2577 | COMMON_UISA_REGS, |
2578 | PPC_UISA_SPRS, | |
2579 | PPC_SEGMENT_REGS, | |
2580 | PPC_OEA_SPRS, | |
13ac140c | 2581 | /* 119 */ S(eie), S(eid), S(nri) |
c906108c SS |
2582 | }; |
2583 | ||
64366f1c | 2584 | /* Motorola PowerPC 860 or 850. */ |
7a78ae4e | 2585 | static const struct reg registers_860[] = |
c5aa993b | 2586 | { |
7a78ae4e ND |
2587 | COMMON_UISA_REGS, |
2588 | PPC_UISA_SPRS, | |
2589 | PPC_SEGMENT_REGS, | |
2590 | PPC_OEA_SPRS, | |
13ac140c JB |
2591 | /* 119 */ S(eie), S(eid), S(nri), S(cmpa), |
2592 | /* 123 */ S(cmpb), S(cmpc), S(cmpd), S(icr), | |
2593 | /* 127 */ S(der), S(counta), S(countb), S(cmpe), | |
2594 | /* 131 */ S(cmpf), S(cmpg), S(cmph), S(lctrl1), | |
2595 | /* 135 */ S(lctrl2), S(ictrl), S(bar), S(ic_cst), | |
2596 | /* 139 */ S(ic_adr), S(ic_dat), S(dc_cst), S(dc_adr), | |
2597 | /* 143 */ S(dc_dat), S(dpdr), S(dpir), S(immr), | |
2598 | /* 147 */ S(mi_ctr), S(mi_ap), S(mi_epn), S(mi_twc), | |
2599 | /* 151 */ S(mi_rpn), S(md_ctr), S(m_casid), S(md_ap), | |
2600 | /* 155 */ S(md_epn), S(m_twb), S(md_twc), S(md_rpn), | |
2601 | /* 159 */ S(m_tw), S(mi_dbcam), S(mi_dbram0), S(mi_dbram1), | |
2602 | /* 163 */ S(md_dbcam), S(md_dbram0), S(md_dbram1) | |
c906108c SS |
2603 | }; |
2604 | ||
7a78ae4e ND |
2605 | /* Motorola PowerPC 601. Note that the 601 has different register numbers |
2606 | for reading and writing RTCU and RTCL. However, how one reads and writes a | |
c906108c | 2607 | register is the stub's problem. */ |
7a78ae4e | 2608 | static const struct reg registers_601[] = |
c5aa993b | 2609 | { |
7a78ae4e ND |
2610 | COMMON_UISA_REGS, |
2611 | PPC_UISA_SPRS, | |
2612 | PPC_SEGMENT_REGS, | |
2613 | PPC_OEA_SPRS, | |
13ac140c JB |
2614 | /* 119 */ S(hid0), S(hid1), S(iabr), S(dabr), |
2615 | /* 123 */ S(pir), S(mq), S(rtcu), S(rtcl) | |
c906108c SS |
2616 | }; |
2617 | ||
13ac140c JB |
2618 | /* Motorola PowerPC 602. |
2619 | See the notes under the 403 about 'tcr'. */ | |
7a78ae4e | 2620 | static const struct reg registers_602[] = |
c5aa993b | 2621 | { |
7a78ae4e ND |
2622 | COMMON_UISA_REGS, |
2623 | PPC_UISA_SPRS, | |
2624 | PPC_SEGMENT_REGS, | |
2625 | PPC_OEA_SPRS, | |
13ac140c JB |
2626 | /* 119 */ S(hid0), S(hid1), S(iabr), R0, |
2627 | /* 123 */ R0, SN4(tcr, ppc_spr_602_tcr), S(ibr), S(esasrr), | |
2628 | /* 127 */ S(sebr), S(ser), S(sp), S(lt) | |
c906108c SS |
2629 | }; |
2630 | ||
64366f1c | 2631 | /* Motorola/IBM PowerPC 603 or 603e. */ |
7a78ae4e | 2632 | static const struct reg registers_603[] = |
c5aa993b | 2633 | { |
7a78ae4e ND |
2634 | COMMON_UISA_REGS, |
2635 | PPC_UISA_SPRS, | |
2636 | PPC_SEGMENT_REGS, | |
2637 | PPC_OEA_SPRS, | |
13ac140c JB |
2638 | /* 119 */ S(hid0), S(hid1), S(iabr), R0, |
2639 | /* 123 */ R0, S(dmiss), S(dcmp), S(hash1), | |
2640 | /* 127 */ S(hash2), S(imiss), S(icmp), S(rpa) | |
c906108c SS |
2641 | }; |
2642 | ||
64366f1c | 2643 | /* Motorola PowerPC 604 or 604e. */ |
7a78ae4e | 2644 | static const struct reg registers_604[] = |
c5aa993b | 2645 | { |
7a78ae4e ND |
2646 | COMMON_UISA_REGS, |
2647 | PPC_UISA_SPRS, | |
2648 | PPC_SEGMENT_REGS, | |
2649 | PPC_OEA_SPRS, | |
13ac140c JB |
2650 | /* 119 */ S(hid0), S(hid1), S(iabr), S(dabr), |
2651 | /* 123 */ S(pir), S(mmcr0), S(pmc1), S(pmc2), | |
2652 | /* 127 */ S(sia), S(sda) | |
c906108c SS |
2653 | }; |
2654 | ||
64366f1c | 2655 | /* Motorola/IBM PowerPC 750 or 740. */ |
7a78ae4e | 2656 | static const struct reg registers_750[] = |
c5aa993b | 2657 | { |
7a78ae4e ND |
2658 | COMMON_UISA_REGS, |
2659 | PPC_UISA_SPRS, | |
2660 | PPC_SEGMENT_REGS, | |
2661 | PPC_OEA_SPRS, | |
13ac140c JB |
2662 | /* 119 */ S(hid0), S(hid1), S(iabr), S(dabr), |
2663 | /* 123 */ R0, S(ummcr0), S(upmc1), S(upmc2), | |
2664 | /* 127 */ S(usia), S(ummcr1), S(upmc3), S(upmc4), | |
2665 | /* 131 */ S(mmcr0), S(pmc1), S(pmc2), S(sia), | |
2666 | /* 135 */ S(mmcr1), S(pmc3), S(pmc4), S(l2cr), | |
2667 | /* 139 */ S(ictc), S(thrm1), S(thrm2), S(thrm3) | |
c906108c SS |
2668 | }; |
2669 | ||
2670 | ||
64366f1c | 2671 | /* Motorola PowerPC 7400. */ |
1fcc0bb8 EZ |
2672 | static const struct reg registers_7400[] = |
2673 | { | |
2674 | /* gpr0-gpr31, fpr0-fpr31 */ | |
2675 | COMMON_UISA_REGS, | |
13c7b1ca | 2676 | /* cr, lr, ctr, xer, fpscr */ |
1fcc0bb8 EZ |
2677 | PPC_UISA_SPRS, |
2678 | /* sr0-sr15 */ | |
2679 | PPC_SEGMENT_REGS, | |
2680 | PPC_OEA_SPRS, | |
2681 | /* vr0-vr31, vrsave, vscr */ | |
2682 | PPC_ALTIVEC_REGS | |
2683 | /* FIXME? Add more registers? */ | |
2684 | }; | |
2685 | ||
c8001721 EZ |
2686 | /* Motorola e500. */ |
2687 | static const struct reg registers_e500[] = | |
2688 | { | |
6ced10dd JB |
2689 | /* 0 .. 31 */ PPC_SPE_GP_REGS, |
2690 | /* 32 .. 63 */ PPC_SPE_UPPER_GP_REGS, | |
2691 | /* 64 .. 65 */ R(pc), R(ps), | |
2692 | /* 66 .. 70 */ PPC_UISA_NOFP_SPRS, | |
2693 | /* 71 .. 72 */ R8(acc), S4(spefscr), | |
338ef23d AC |
2694 | /* NOTE: Add new registers here the end of the raw register |
2695 | list and just before the first pseudo register. */ | |
6ced10dd | 2696 | /* 73 .. 104 */ PPC_EV_PSEUDO_REGS |
c8001721 EZ |
2697 | }; |
2698 | ||
c906108c | 2699 | /* Information about a particular processor variant. */ |
7a78ae4e | 2700 | |
c906108c | 2701 | struct variant |
c5aa993b JM |
2702 | { |
2703 | /* Name of this variant. */ | |
2704 | char *name; | |
c906108c | 2705 | |
c5aa993b JM |
2706 | /* English description of the variant. */ |
2707 | char *description; | |
c906108c | 2708 | |
64366f1c | 2709 | /* bfd_arch_info.arch corresponding to variant. */ |
7a78ae4e ND |
2710 | enum bfd_architecture arch; |
2711 | ||
64366f1c | 2712 | /* bfd_arch_info.mach corresponding to variant. */ |
7a78ae4e ND |
2713 | unsigned long mach; |
2714 | ||
489461e2 EZ |
2715 | /* Number of real registers. */ |
2716 | int nregs; | |
2717 | ||
2718 | /* Number of pseudo registers. */ | |
2719 | int npregs; | |
2720 | ||
2721 | /* Number of total registers (the sum of nregs and npregs). */ | |
2722 | int num_tot_regs; | |
2723 | ||
c5aa993b JM |
2724 | /* Table of register names; registers[R] is the name of the register |
2725 | number R. */ | |
7a78ae4e | 2726 | const struct reg *regs; |
c5aa993b | 2727 | }; |
c906108c | 2728 | |
489461e2 EZ |
2729 | #define tot_num_registers(list) (sizeof (list) / sizeof((list)[0])) |
2730 | ||
2731 | static int | |
2732 | num_registers (const struct reg *reg_list, int num_tot_regs) | |
2733 | { | |
2734 | int i; | |
2735 | int nregs = 0; | |
2736 | ||
2737 | for (i = 0; i < num_tot_regs; i++) | |
2738 | if (!reg_list[i].pseudo) | |
2739 | nregs++; | |
2740 | ||
2741 | return nregs; | |
2742 | } | |
2743 | ||
2744 | static int | |
2745 | num_pseudo_registers (const struct reg *reg_list, int num_tot_regs) | |
2746 | { | |
2747 | int i; | |
2748 | int npregs = 0; | |
2749 | ||
2750 | for (i = 0; i < num_tot_regs; i++) | |
2751 | if (reg_list[i].pseudo) | |
2752 | npregs ++; | |
2753 | ||
2754 | return npregs; | |
2755 | } | |
c906108c | 2756 | |
c906108c SS |
2757 | /* Information in this table comes from the following web sites: |
2758 | IBM: http://www.chips.ibm.com:80/products/embedded/ | |
2759 | Motorola: http://www.mot.com/SPS/PowerPC/ | |
2760 | ||
2761 | I'm sure I've got some of the variant descriptions not quite right. | |
2762 | Please report any inaccuracies you find to GDB's maintainer. | |
2763 | ||
2764 | If you add entries to this table, please be sure to allow the new | |
2765 | value as an argument to the --with-cpu flag, in configure.in. */ | |
2766 | ||
489461e2 | 2767 | static struct variant variants[] = |
c906108c | 2768 | { |
489461e2 | 2769 | |
7a78ae4e | 2770 | {"powerpc", "PowerPC user-level", bfd_arch_powerpc, |
489461e2 EZ |
2771 | bfd_mach_ppc, -1, -1, tot_num_registers (registers_powerpc), |
2772 | registers_powerpc}, | |
7a78ae4e | 2773 | {"power", "POWER user-level", bfd_arch_rs6000, |
489461e2 EZ |
2774 | bfd_mach_rs6k, -1, -1, tot_num_registers (registers_power), |
2775 | registers_power}, | |
7a78ae4e | 2776 | {"403", "IBM PowerPC 403", bfd_arch_powerpc, |
489461e2 EZ |
2777 | bfd_mach_ppc_403, -1, -1, tot_num_registers (registers_403), |
2778 | registers_403}, | |
7a78ae4e | 2779 | {"601", "Motorola PowerPC 601", bfd_arch_powerpc, |
489461e2 EZ |
2780 | bfd_mach_ppc_601, -1, -1, tot_num_registers (registers_601), |
2781 | registers_601}, | |
7a78ae4e | 2782 | {"602", "Motorola PowerPC 602", bfd_arch_powerpc, |
489461e2 EZ |
2783 | bfd_mach_ppc_602, -1, -1, tot_num_registers (registers_602), |
2784 | registers_602}, | |
7a78ae4e | 2785 | {"603", "Motorola/IBM PowerPC 603 or 603e", bfd_arch_powerpc, |
489461e2 EZ |
2786 | bfd_mach_ppc_603, -1, -1, tot_num_registers (registers_603), |
2787 | registers_603}, | |
7a78ae4e | 2788 | {"604", "Motorola PowerPC 604 or 604e", bfd_arch_powerpc, |
489461e2 EZ |
2789 | 604, -1, -1, tot_num_registers (registers_604), |
2790 | registers_604}, | |
7a78ae4e | 2791 | {"403GC", "IBM PowerPC 403GC", bfd_arch_powerpc, |
489461e2 EZ |
2792 | bfd_mach_ppc_403gc, -1, -1, tot_num_registers (registers_403GC), |
2793 | registers_403GC}, | |
7a78ae4e | 2794 | {"505", "Motorola PowerPC 505", bfd_arch_powerpc, |
489461e2 EZ |
2795 | bfd_mach_ppc_505, -1, -1, tot_num_registers (registers_505), |
2796 | registers_505}, | |
7a78ae4e | 2797 | {"860", "Motorola PowerPC 860 or 850", bfd_arch_powerpc, |
489461e2 EZ |
2798 | bfd_mach_ppc_860, -1, -1, tot_num_registers (registers_860), |
2799 | registers_860}, | |
7a78ae4e | 2800 | {"750", "Motorola/IBM PowerPC 750 or 740", bfd_arch_powerpc, |
489461e2 EZ |
2801 | bfd_mach_ppc_750, -1, -1, tot_num_registers (registers_750), |
2802 | registers_750}, | |
1fcc0bb8 | 2803 | {"7400", "Motorola/IBM PowerPC 7400 (G4)", bfd_arch_powerpc, |
489461e2 EZ |
2804 | bfd_mach_ppc_7400, -1, -1, tot_num_registers (registers_7400), |
2805 | registers_7400}, | |
c8001721 EZ |
2806 | {"e500", "Motorola PowerPC e500", bfd_arch_powerpc, |
2807 | bfd_mach_ppc_e500, -1, -1, tot_num_registers (registers_e500), | |
2808 | registers_e500}, | |
7a78ae4e | 2809 | |
5d57ee30 KB |
2810 | /* 64-bit */ |
2811 | {"powerpc64", "PowerPC 64-bit user-level", bfd_arch_powerpc, | |
489461e2 EZ |
2812 | bfd_mach_ppc64, -1, -1, tot_num_registers (registers_powerpc), |
2813 | registers_powerpc}, | |
7a78ae4e | 2814 | {"620", "Motorola PowerPC 620", bfd_arch_powerpc, |
489461e2 EZ |
2815 | bfd_mach_ppc_620, -1, -1, tot_num_registers (registers_powerpc), |
2816 | registers_powerpc}, | |
5d57ee30 | 2817 | {"630", "Motorola PowerPC 630", bfd_arch_powerpc, |
489461e2 EZ |
2818 | bfd_mach_ppc_630, -1, -1, tot_num_registers (registers_powerpc), |
2819 | registers_powerpc}, | |
7a78ae4e | 2820 | {"a35", "PowerPC A35", bfd_arch_powerpc, |
489461e2 EZ |
2821 | bfd_mach_ppc_a35, -1, -1, tot_num_registers (registers_powerpc), |
2822 | registers_powerpc}, | |
5d57ee30 | 2823 | {"rs64ii", "PowerPC rs64ii", bfd_arch_powerpc, |
489461e2 EZ |
2824 | bfd_mach_ppc_rs64ii, -1, -1, tot_num_registers (registers_powerpc), |
2825 | registers_powerpc}, | |
5d57ee30 | 2826 | {"rs64iii", "PowerPC rs64iii", bfd_arch_powerpc, |
489461e2 EZ |
2827 | bfd_mach_ppc_rs64iii, -1, -1, tot_num_registers (registers_powerpc), |
2828 | registers_powerpc}, | |
5d57ee30 | 2829 | |
64366f1c | 2830 | /* FIXME: I haven't checked the register sets of the following. */ |
7a78ae4e | 2831 | {"rs1", "IBM POWER RS1", bfd_arch_rs6000, |
489461e2 EZ |
2832 | bfd_mach_rs6k_rs1, -1, -1, tot_num_registers (registers_power), |
2833 | registers_power}, | |
7a78ae4e | 2834 | {"rsc", "IBM POWER RSC", bfd_arch_rs6000, |
489461e2 EZ |
2835 | bfd_mach_rs6k_rsc, -1, -1, tot_num_registers (registers_power), |
2836 | registers_power}, | |
7a78ae4e | 2837 | {"rs2", "IBM POWER RS2", bfd_arch_rs6000, |
489461e2 EZ |
2838 | bfd_mach_rs6k_rs2, -1, -1, tot_num_registers (registers_power), |
2839 | registers_power}, | |
7a78ae4e | 2840 | |
489461e2 | 2841 | {0, 0, 0, 0, 0, 0, 0, 0} |
c906108c SS |
2842 | }; |
2843 | ||
64366f1c | 2844 | /* Initialize the number of registers and pseudo registers in each variant. */ |
489461e2 EZ |
2845 | |
2846 | static void | |
2847 | init_variants (void) | |
2848 | { | |
2849 | struct variant *v; | |
2850 | ||
2851 | for (v = variants; v->name; v++) | |
2852 | { | |
2853 | if (v->nregs == -1) | |
2854 | v->nregs = num_registers (v->regs, v->num_tot_regs); | |
2855 | if (v->npregs == -1) | |
2856 | v->npregs = num_pseudo_registers (v->regs, v->num_tot_regs); | |
2857 | } | |
2858 | } | |
c906108c | 2859 | |
7a78ae4e | 2860 | /* Return the variant corresponding to architecture ARCH and machine number |
64366f1c | 2861 | MACH. If no such variant exists, return null. */ |
c906108c | 2862 | |
7a78ae4e ND |
2863 | static const struct variant * |
2864 | find_variant_by_arch (enum bfd_architecture arch, unsigned long mach) | |
c906108c | 2865 | { |
7a78ae4e | 2866 | const struct variant *v; |
c5aa993b | 2867 | |
7a78ae4e ND |
2868 | for (v = variants; v->name; v++) |
2869 | if (arch == v->arch && mach == v->mach) | |
2870 | return v; | |
c906108c | 2871 | |
7a78ae4e | 2872 | return NULL; |
c906108c | 2873 | } |
9364a0ef EZ |
2874 | |
2875 | static int | |
2876 | gdb_print_insn_powerpc (bfd_vma memaddr, disassemble_info *info) | |
2877 | { | |
ee4f0f76 DJ |
2878 | if (!info->disassembler_options) |
2879 | info->disassembler_options = "any"; | |
2880 | ||
9364a0ef EZ |
2881 | if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) |
2882 | return print_insn_big_powerpc (memaddr, info); | |
2883 | else | |
2884 | return print_insn_little_powerpc (memaddr, info); | |
2885 | } | |
7a78ae4e | 2886 | \f |
61a65099 KB |
2887 | static CORE_ADDR |
2888 | rs6000_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame) | |
2889 | { | |
2890 | return frame_unwind_register_unsigned (next_frame, PC_REGNUM); | |
2891 | } | |
2892 | ||
2893 | static struct frame_id | |
2894 | rs6000_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame) | |
2895 | { | |
2896 | return frame_id_build (frame_unwind_register_unsigned (next_frame, | |
2897 | SP_REGNUM), | |
2898 | frame_pc_unwind (next_frame)); | |
2899 | } | |
2900 | ||
2901 | struct rs6000_frame_cache | |
2902 | { | |
2903 | CORE_ADDR base; | |
2904 | CORE_ADDR initial_sp; | |
2905 | struct trad_frame_saved_reg *saved_regs; | |
2906 | }; | |
2907 | ||
2908 | static struct rs6000_frame_cache * | |
2909 | rs6000_frame_cache (struct frame_info *next_frame, void **this_cache) | |
2910 | { | |
2911 | struct rs6000_frame_cache *cache; | |
2912 | struct gdbarch *gdbarch = get_frame_arch (next_frame); | |
2913 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
2914 | struct rs6000_framedata fdata; | |
2915 | int wordsize = tdep->wordsize; | |
e10b1c4c | 2916 | CORE_ADDR func, pc; |
61a65099 KB |
2917 | |
2918 | if ((*this_cache) != NULL) | |
2919 | return (*this_cache); | |
2920 | cache = FRAME_OBSTACK_ZALLOC (struct rs6000_frame_cache); | |
2921 | (*this_cache) = cache; | |
2922 | cache->saved_regs = trad_frame_alloc_saved_regs (next_frame); | |
2923 | ||
93d42b30 | 2924 | func = frame_func_unwind (next_frame, NORMAL_FRAME); |
e10b1c4c DJ |
2925 | pc = frame_pc_unwind (next_frame); |
2926 | skip_prologue (func, pc, &fdata); | |
2927 | ||
2928 | /* Figure out the parent's stack pointer. */ | |
2929 | ||
2930 | /* NOTE: cagney/2002-04-14: The ->frame points to the inner-most | |
2931 | address of the current frame. Things might be easier if the | |
2932 | ->frame pointed to the outer-most address of the frame. In | |
2933 | the mean time, the address of the prev frame is used as the | |
2934 | base address of this frame. */ | |
2935 | cache->base = frame_unwind_register_unsigned (next_frame, SP_REGNUM); | |
2936 | ||
2937 | /* If the function appears to be frameless, check a couple of likely | |
2938 | indicators that we have simply failed to find the frame setup. | |
2939 | Two common cases of this are missing symbols (i.e. | |
2940 | frame_func_unwind returns the wrong address or 0), and assembly | |
2941 | stubs which have a fast exit path but set up a frame on the slow | |
2942 | path. | |
2943 | ||
2944 | If the LR appears to return to this function, then presume that | |
2945 | we have an ABI compliant frame that we failed to find. */ | |
2946 | if (fdata.frameless && fdata.lr_offset == 0) | |
61a65099 | 2947 | { |
e10b1c4c DJ |
2948 | CORE_ADDR saved_lr; |
2949 | int make_frame = 0; | |
2950 | ||
2951 | saved_lr = frame_unwind_register_unsigned (next_frame, | |
2952 | tdep->ppc_lr_regnum); | |
2953 | if (func == 0 && saved_lr == pc) | |
2954 | make_frame = 1; | |
2955 | else if (func != 0) | |
2956 | { | |
2957 | CORE_ADDR saved_func = get_pc_function_start (saved_lr); | |
2958 | if (func == saved_func) | |
2959 | make_frame = 1; | |
2960 | } | |
2961 | ||
2962 | if (make_frame) | |
2963 | { | |
2964 | fdata.frameless = 0; | |
2965 | fdata.lr_offset = wordsize; | |
2966 | } | |
61a65099 | 2967 | } |
e10b1c4c DJ |
2968 | |
2969 | if (!fdata.frameless) | |
2970 | /* Frameless really means stackless. */ | |
2971 | cache->base = read_memory_addr (cache->base, wordsize); | |
2972 | ||
61a65099 KB |
2973 | trad_frame_set_value (cache->saved_regs, SP_REGNUM, cache->base); |
2974 | ||
2975 | /* if != -1, fdata.saved_fpr is the smallest number of saved_fpr. | |
2976 | All fpr's from saved_fpr to fp31 are saved. */ | |
2977 | ||
2978 | if (fdata.saved_fpr >= 0) | |
2979 | { | |
2980 | int i; | |
2981 | CORE_ADDR fpr_addr = cache->base + fdata.fpr_offset; | |
383f0f5b JB |
2982 | |
2983 | /* If skip_prologue says floating-point registers were saved, | |
2984 | but the current architecture has no floating-point registers, | |
2985 | then that's strange. But we have no indices to even record | |
2986 | the addresses under, so we just ignore it. */ | |
2987 | if (ppc_floating_point_unit_p (gdbarch)) | |
063715bf | 2988 | for (i = fdata.saved_fpr; i < ppc_num_fprs; i++) |
383f0f5b JB |
2989 | { |
2990 | cache->saved_regs[tdep->ppc_fp0_regnum + i].addr = fpr_addr; | |
2991 | fpr_addr += 8; | |
2992 | } | |
61a65099 KB |
2993 | } |
2994 | ||
2995 | /* if != -1, fdata.saved_gpr is the smallest number of saved_gpr. | |
2996 | All gpr's from saved_gpr to gpr31 are saved. */ | |
2997 | ||
2998 | if (fdata.saved_gpr >= 0) | |
2999 | { | |
3000 | int i; | |
3001 | CORE_ADDR gpr_addr = cache->base + fdata.gpr_offset; | |
063715bf | 3002 | for (i = fdata.saved_gpr; i < ppc_num_gprs; i++) |
61a65099 KB |
3003 | { |
3004 | cache->saved_regs[tdep->ppc_gp0_regnum + i].addr = gpr_addr; | |
3005 | gpr_addr += wordsize; | |
3006 | } | |
3007 | } | |
3008 | ||
3009 | /* if != -1, fdata.saved_vr is the smallest number of saved_vr. | |
3010 | All vr's from saved_vr to vr31 are saved. */ | |
3011 | if (tdep->ppc_vr0_regnum != -1 && tdep->ppc_vrsave_regnum != -1) | |
3012 | { | |
3013 | if (fdata.saved_vr >= 0) | |
3014 | { | |
3015 | int i; | |
3016 | CORE_ADDR vr_addr = cache->base + fdata.vr_offset; | |
3017 | for (i = fdata.saved_vr; i < 32; i++) | |
3018 | { | |
3019 | cache->saved_regs[tdep->ppc_vr0_regnum + i].addr = vr_addr; | |
3020 | vr_addr += register_size (gdbarch, tdep->ppc_vr0_regnum); | |
3021 | } | |
3022 | } | |
3023 | } | |
3024 | ||
3025 | /* if != -1, fdata.saved_ev is the smallest number of saved_ev. | |
3026 | All vr's from saved_ev to ev31 are saved. ????? */ | |
3027 | if (tdep->ppc_ev0_regnum != -1 && tdep->ppc_ev31_regnum != -1) | |
3028 | { | |
3029 | if (fdata.saved_ev >= 0) | |
3030 | { | |
3031 | int i; | |
3032 | CORE_ADDR ev_addr = cache->base + fdata.ev_offset; | |
063715bf | 3033 | for (i = fdata.saved_ev; i < ppc_num_gprs; i++) |
61a65099 KB |
3034 | { |
3035 | cache->saved_regs[tdep->ppc_ev0_regnum + i].addr = ev_addr; | |
3036 | cache->saved_regs[tdep->ppc_gp0_regnum + i].addr = ev_addr + 4; | |
3037 | ev_addr += register_size (gdbarch, tdep->ppc_ev0_regnum); | |
3038 | } | |
3039 | } | |
3040 | } | |
3041 | ||
3042 | /* If != 0, fdata.cr_offset is the offset from the frame that | |
3043 | holds the CR. */ | |
3044 | if (fdata.cr_offset != 0) | |
3045 | cache->saved_regs[tdep->ppc_cr_regnum].addr = cache->base + fdata.cr_offset; | |
3046 | ||
3047 | /* If != 0, fdata.lr_offset is the offset from the frame that | |
3048 | holds the LR. */ | |
3049 | if (fdata.lr_offset != 0) | |
3050 | cache->saved_regs[tdep->ppc_lr_regnum].addr = cache->base + fdata.lr_offset; | |
3051 | /* The PC is found in the link register. */ | |
3052 | cache->saved_regs[PC_REGNUM] = cache->saved_regs[tdep->ppc_lr_regnum]; | |
3053 | ||
3054 | /* If != 0, fdata.vrsave_offset is the offset from the frame that | |
3055 | holds the VRSAVE. */ | |
3056 | if (fdata.vrsave_offset != 0) | |
3057 | cache->saved_regs[tdep->ppc_vrsave_regnum].addr = cache->base + fdata.vrsave_offset; | |
3058 | ||
3059 | if (fdata.alloca_reg < 0) | |
3060 | /* If no alloca register used, then fi->frame is the value of the | |
3061 | %sp for this frame, and it is good enough. */ | |
3062 | cache->initial_sp = frame_unwind_register_unsigned (next_frame, SP_REGNUM); | |
3063 | else | |
3064 | cache->initial_sp = frame_unwind_register_unsigned (next_frame, | |
3065 | fdata.alloca_reg); | |
3066 | ||
3067 | return cache; | |
3068 | } | |
3069 | ||
3070 | static void | |
3071 | rs6000_frame_this_id (struct frame_info *next_frame, void **this_cache, | |
3072 | struct frame_id *this_id) | |
3073 | { | |
3074 | struct rs6000_frame_cache *info = rs6000_frame_cache (next_frame, | |
3075 | this_cache); | |
93d42b30 DJ |
3076 | (*this_id) = frame_id_build (info->base, |
3077 | frame_func_unwind (next_frame, NORMAL_FRAME)); | |
61a65099 KB |
3078 | } |
3079 | ||
3080 | static void | |
3081 | rs6000_frame_prev_register (struct frame_info *next_frame, | |
3082 | void **this_cache, | |
3083 | int regnum, int *optimizedp, | |
3084 | enum lval_type *lvalp, CORE_ADDR *addrp, | |
50fd1280 | 3085 | int *realnump, gdb_byte *valuep) |
61a65099 KB |
3086 | { |
3087 | struct rs6000_frame_cache *info = rs6000_frame_cache (next_frame, | |
3088 | this_cache); | |
1f67027d AC |
3089 | trad_frame_get_prev_register (next_frame, info->saved_regs, regnum, |
3090 | optimizedp, lvalp, addrp, realnump, valuep); | |
61a65099 KB |
3091 | } |
3092 | ||
3093 | static const struct frame_unwind rs6000_frame_unwind = | |
3094 | { | |
3095 | NORMAL_FRAME, | |
3096 | rs6000_frame_this_id, | |
3097 | rs6000_frame_prev_register | |
3098 | }; | |
3099 | ||
3100 | static const struct frame_unwind * | |
3101 | rs6000_frame_sniffer (struct frame_info *next_frame) | |
3102 | { | |
3103 | return &rs6000_frame_unwind; | |
3104 | } | |
3105 | ||
3106 | \f | |
3107 | ||
3108 | static CORE_ADDR | |
3109 | rs6000_frame_base_address (struct frame_info *next_frame, | |
3110 | void **this_cache) | |
3111 | { | |
3112 | struct rs6000_frame_cache *info = rs6000_frame_cache (next_frame, | |
3113 | this_cache); | |
3114 | return info->initial_sp; | |
3115 | } | |
3116 | ||
3117 | static const struct frame_base rs6000_frame_base = { | |
3118 | &rs6000_frame_unwind, | |
3119 | rs6000_frame_base_address, | |
3120 | rs6000_frame_base_address, | |
3121 | rs6000_frame_base_address | |
3122 | }; | |
3123 | ||
3124 | static const struct frame_base * | |
3125 | rs6000_frame_base_sniffer (struct frame_info *next_frame) | |
3126 | { | |
3127 | return &rs6000_frame_base; | |
3128 | } | |
3129 | ||
7a78ae4e ND |
3130 | /* Initialize the current architecture based on INFO. If possible, re-use an |
3131 | architecture from ARCHES, which is a list of architectures already created | |
3132 | during this debugging session. | |
c906108c | 3133 | |
7a78ae4e | 3134 | Called e.g. at program startup, when reading a core file, and when reading |
64366f1c | 3135 | a binary file. */ |
c906108c | 3136 | |
7a78ae4e ND |
3137 | static struct gdbarch * |
3138 | rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) | |
3139 | { | |
3140 | struct gdbarch *gdbarch; | |
3141 | struct gdbarch_tdep *tdep; | |
708ff411 | 3142 | int wordsize, from_xcoff_exec, from_elf_exec, i, off; |
7a78ae4e ND |
3143 | struct reg *regs; |
3144 | const struct variant *v; | |
3145 | enum bfd_architecture arch; | |
3146 | unsigned long mach; | |
3147 | bfd abfd; | |
7b112f9c | 3148 | int sysv_abi; |
5bf1c677 | 3149 | asection *sect; |
7a78ae4e | 3150 | |
9aa1e687 | 3151 | from_xcoff_exec = info.abfd && info.abfd->format == bfd_object && |
7a78ae4e ND |
3152 | bfd_get_flavour (info.abfd) == bfd_target_xcoff_flavour; |
3153 | ||
9aa1e687 KB |
3154 | from_elf_exec = info.abfd && info.abfd->format == bfd_object && |
3155 | bfd_get_flavour (info.abfd) == bfd_target_elf_flavour; | |
3156 | ||
3157 | sysv_abi = info.abfd && bfd_get_flavour (info.abfd) == bfd_target_elf_flavour; | |
3158 | ||
e712c1cf | 3159 | /* Check word size. If INFO is from a binary file, infer it from |
64366f1c | 3160 | that, else choose a likely default. */ |
9aa1e687 | 3161 | if (from_xcoff_exec) |
c906108c | 3162 | { |
11ed25ac | 3163 | if (bfd_xcoff_is_xcoff64 (info.abfd)) |
7a78ae4e ND |
3164 | wordsize = 8; |
3165 | else | |
3166 | wordsize = 4; | |
c906108c | 3167 | } |
9aa1e687 KB |
3168 | else if (from_elf_exec) |
3169 | { | |
3170 | if (elf_elfheader (info.abfd)->e_ident[EI_CLASS] == ELFCLASS64) | |
3171 | wordsize = 8; | |
3172 | else | |
3173 | wordsize = 4; | |
3174 | } | |
c906108c | 3175 | else |
7a78ae4e | 3176 | { |
27b15785 KB |
3177 | if (info.bfd_arch_info != NULL && info.bfd_arch_info->bits_per_word != 0) |
3178 | wordsize = info.bfd_arch_info->bits_per_word / | |
3179 | info.bfd_arch_info->bits_per_byte; | |
3180 | else | |
3181 | wordsize = 4; | |
7a78ae4e | 3182 | } |
c906108c | 3183 | |
13c0b536 | 3184 | /* Find a candidate among extant architectures. */ |
7a78ae4e ND |
3185 | for (arches = gdbarch_list_lookup_by_info (arches, &info); |
3186 | arches != NULL; | |
3187 | arches = gdbarch_list_lookup_by_info (arches->next, &info)) | |
3188 | { | |
3189 | /* Word size in the various PowerPC bfd_arch_info structs isn't | |
3190 | meaningful, because 64-bit CPUs can run in 32-bit mode. So, perform | |
64366f1c | 3191 | separate word size check. */ |
7a78ae4e | 3192 | tdep = gdbarch_tdep (arches->gdbarch); |
4be87837 | 3193 | if (tdep && tdep->wordsize == wordsize) |
7a78ae4e ND |
3194 | return arches->gdbarch; |
3195 | } | |
c906108c | 3196 | |
7a78ae4e ND |
3197 | /* None found, create a new architecture from INFO, whose bfd_arch_info |
3198 | validity depends on the source: | |
3199 | - executable useless | |
3200 | - rs6000_host_arch() good | |
3201 | - core file good | |
3202 | - "set arch" trust blindly | |
3203 | - GDB startup useless but harmless */ | |
c906108c | 3204 | |
9aa1e687 | 3205 | if (!from_xcoff_exec) |
c906108c | 3206 | { |
b732d07d | 3207 | arch = info.bfd_arch_info->arch; |
7a78ae4e | 3208 | mach = info.bfd_arch_info->mach; |
c906108c | 3209 | } |
7a78ae4e | 3210 | else |
c906108c | 3211 | { |
7a78ae4e | 3212 | arch = bfd_arch_powerpc; |
35cec841 | 3213 | bfd_default_set_arch_mach (&abfd, arch, 0); |
7a78ae4e | 3214 | info.bfd_arch_info = bfd_get_arch_info (&abfd); |
35cec841 | 3215 | mach = info.bfd_arch_info->mach; |
7a78ae4e ND |
3216 | } |
3217 | tdep = xmalloc (sizeof (struct gdbarch_tdep)); | |
3218 | tdep->wordsize = wordsize; | |
5bf1c677 EZ |
3219 | |
3220 | /* For e500 executables, the apuinfo section is of help here. Such | |
3221 | section contains the identifier and revision number of each | |
3222 | Application-specific Processing Unit that is present on the | |
3223 | chip. The content of the section is determined by the assembler | |
3224 | which looks at each instruction and determines which unit (and | |
3225 | which version of it) can execute it. In our case we just look for | |
3226 | the existance of the section. */ | |
3227 | ||
3228 | if (info.abfd) | |
3229 | { | |
3230 | sect = bfd_get_section_by_name (info.abfd, ".PPC.EMB.apuinfo"); | |
3231 | if (sect) | |
3232 | { | |
3233 | arch = info.bfd_arch_info->arch; | |
3234 | mach = bfd_mach_ppc_e500; | |
3235 | bfd_default_set_arch_mach (&abfd, arch, mach); | |
3236 | info.bfd_arch_info = bfd_get_arch_info (&abfd); | |
3237 | } | |
3238 | } | |
3239 | ||
7a78ae4e | 3240 | gdbarch = gdbarch_alloc (&info, tdep); |
7a78ae4e | 3241 | |
489461e2 EZ |
3242 | /* Initialize the number of real and pseudo registers in each variant. */ |
3243 | init_variants (); | |
3244 | ||
64366f1c | 3245 | /* Choose variant. */ |
7a78ae4e ND |
3246 | v = find_variant_by_arch (arch, mach); |
3247 | if (!v) | |
dd47e6fd EZ |
3248 | return NULL; |
3249 | ||
7a78ae4e ND |
3250 | tdep->regs = v->regs; |
3251 | ||
2188cbdd | 3252 | tdep->ppc_gp0_regnum = 0; |
2188cbdd EZ |
3253 | tdep->ppc_toc_regnum = 2; |
3254 | tdep->ppc_ps_regnum = 65; | |
3255 | tdep->ppc_cr_regnum = 66; | |
3256 | tdep->ppc_lr_regnum = 67; | |
3257 | tdep->ppc_ctr_regnum = 68; | |
3258 | tdep->ppc_xer_regnum = 69; | |
3259 | if (v->mach == bfd_mach_ppc_601) | |
3260 | tdep->ppc_mq_regnum = 124; | |
708ff411 | 3261 | else if (arch == bfd_arch_rs6000) |
2188cbdd | 3262 | tdep->ppc_mq_regnum = 70; |
e3f36dbd KB |
3263 | else |
3264 | tdep->ppc_mq_regnum = -1; | |
366f009f | 3265 | tdep->ppc_fp0_regnum = 32; |
708ff411 | 3266 | tdep->ppc_fpscr_regnum = (arch == bfd_arch_rs6000) ? 71 : 70; |
f86a7158 | 3267 | tdep->ppc_sr0_regnum = 71; |
baffbae0 JB |
3268 | tdep->ppc_vr0_regnum = -1; |
3269 | tdep->ppc_vrsave_regnum = -1; | |
6ced10dd | 3270 | tdep->ppc_ev0_upper_regnum = -1; |
baffbae0 JB |
3271 | tdep->ppc_ev0_regnum = -1; |
3272 | tdep->ppc_ev31_regnum = -1; | |
867e2dc5 JB |
3273 | tdep->ppc_acc_regnum = -1; |
3274 | tdep->ppc_spefscr_regnum = -1; | |
2188cbdd | 3275 | |
c8001721 EZ |
3276 | set_gdbarch_pc_regnum (gdbarch, 64); |
3277 | set_gdbarch_sp_regnum (gdbarch, 1); | |
0ba6dca9 | 3278 | set_gdbarch_deprecated_fp_regnum (gdbarch, 1); |
6f7f3f0d | 3279 | set_gdbarch_fp0_regnum (gdbarch, 32); |
9f643768 | 3280 | set_gdbarch_register_sim_regno (gdbarch, rs6000_register_sim_regno); |
afd48b75 | 3281 | if (sysv_abi && wordsize == 8) |
05580c65 | 3282 | set_gdbarch_return_value (gdbarch, ppc64_sysv_abi_return_value); |
e754ae69 | 3283 | else if (sysv_abi && wordsize == 4) |
05580c65 | 3284 | set_gdbarch_return_value (gdbarch, ppc_sysv_abi_return_value); |
afd48b75 | 3285 | else |
d217aaed | 3286 | set_gdbarch_return_value (gdbarch, rs6000_return_value); |
c8001721 | 3287 | |
baffbae0 JB |
3288 | /* Set lr_frame_offset. */ |
3289 | if (wordsize == 8) | |
3290 | tdep->lr_frame_offset = 16; | |
3291 | else if (sysv_abi) | |
3292 | tdep->lr_frame_offset = 4; | |
3293 | else | |
3294 | tdep->lr_frame_offset = 8; | |
3295 | ||
f86a7158 JB |
3296 | if (v->arch == bfd_arch_rs6000) |
3297 | tdep->ppc_sr0_regnum = -1; | |
3298 | else if (v->arch == bfd_arch_powerpc) | |
1fcc0bb8 EZ |
3299 | switch (v->mach) |
3300 | { | |
3301 | case bfd_mach_ppc: | |
412b3060 | 3302 | tdep->ppc_sr0_regnum = -1; |
1fcc0bb8 EZ |
3303 | tdep->ppc_vr0_regnum = 71; |
3304 | tdep->ppc_vrsave_regnum = 104; | |
3305 | break; | |
3306 | case bfd_mach_ppc_7400: | |
3307 | tdep->ppc_vr0_regnum = 119; | |
54c2a1e6 | 3308 | tdep->ppc_vrsave_regnum = 152; |
c8001721 EZ |
3309 | break; |
3310 | case bfd_mach_ppc_e500: | |
c8001721 | 3311 | tdep->ppc_toc_regnum = -1; |
6ced10dd JB |
3312 | tdep->ppc_ev0_upper_regnum = 32; |
3313 | tdep->ppc_ev0_regnum = 73; | |
3314 | tdep->ppc_ev31_regnum = 104; | |
3315 | tdep->ppc_acc_regnum = 71; | |
3316 | tdep->ppc_spefscr_regnum = 72; | |
383f0f5b JB |
3317 | tdep->ppc_fp0_regnum = -1; |
3318 | tdep->ppc_fpscr_regnum = -1; | |
f86a7158 | 3319 | tdep->ppc_sr0_regnum = -1; |
c8001721 EZ |
3320 | set_gdbarch_pseudo_register_read (gdbarch, e500_pseudo_register_read); |
3321 | set_gdbarch_pseudo_register_write (gdbarch, e500_pseudo_register_write); | |
6ced10dd | 3322 | set_gdbarch_register_reggroup_p (gdbarch, e500_register_reggroup_p); |
1fcc0bb8 | 3323 | break; |
f86a7158 JB |
3324 | |
3325 | case bfd_mach_ppc64: | |
3326 | case bfd_mach_ppc_620: | |
3327 | case bfd_mach_ppc_630: | |
3328 | case bfd_mach_ppc_a35: | |
3329 | case bfd_mach_ppc_rs64ii: | |
3330 | case bfd_mach_ppc_rs64iii: | |
3331 | /* These processor's register sets don't have segment registers. */ | |
3332 | tdep->ppc_sr0_regnum = -1; | |
3333 | break; | |
1fcc0bb8 | 3334 | } |
f86a7158 JB |
3335 | else |
3336 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 AC |
3337 | _("rs6000_gdbarch_init: " |
3338 | "received unexpected BFD 'arch' value")); | |
1fcc0bb8 | 3339 | |
e0d24f8d WZ |
3340 | set_gdbarch_have_nonsteppable_watchpoint (gdbarch, 1); |
3341 | ||
338ef23d AC |
3342 | /* Sanity check on registers. */ |
3343 | gdb_assert (strcmp (tdep->regs[tdep->ppc_gp0_regnum].name, "r0") == 0); | |
3344 | ||
56a6dfb9 | 3345 | /* Select instruction printer. */ |
708ff411 | 3346 | if (arch == bfd_arch_rs6000) |
9364a0ef | 3347 | set_gdbarch_print_insn (gdbarch, print_insn_rs6000); |
56a6dfb9 | 3348 | else |
9364a0ef | 3349 | set_gdbarch_print_insn (gdbarch, gdb_print_insn_powerpc); |
7495d1dc | 3350 | |
7a78ae4e | 3351 | set_gdbarch_write_pc (gdbarch, generic_target_write_pc); |
7a78ae4e ND |
3352 | |
3353 | set_gdbarch_num_regs (gdbarch, v->nregs); | |
c8001721 | 3354 | set_gdbarch_num_pseudo_regs (gdbarch, v->npregs); |
7a78ae4e | 3355 | set_gdbarch_register_name (gdbarch, rs6000_register_name); |
691d145a | 3356 | set_gdbarch_register_type (gdbarch, rs6000_register_type); |
c44ca51c | 3357 | set_gdbarch_register_reggroup_p (gdbarch, rs6000_register_reggroup_p); |
7a78ae4e ND |
3358 | |
3359 | set_gdbarch_ptr_bit (gdbarch, wordsize * TARGET_CHAR_BIT); | |
3360 | set_gdbarch_short_bit (gdbarch, 2 * TARGET_CHAR_BIT); | |
3361 | set_gdbarch_int_bit (gdbarch, 4 * TARGET_CHAR_BIT); | |
3362 | set_gdbarch_long_bit (gdbarch, wordsize * TARGET_CHAR_BIT); | |
3363 | set_gdbarch_long_long_bit (gdbarch, 8 * TARGET_CHAR_BIT); | |
3364 | set_gdbarch_float_bit (gdbarch, 4 * TARGET_CHAR_BIT); | |
3365 | set_gdbarch_double_bit (gdbarch, 8 * TARGET_CHAR_BIT); | |
ab9fe00e KB |
3366 | if (sysv_abi) |
3367 | set_gdbarch_long_double_bit (gdbarch, 16 * TARGET_CHAR_BIT); | |
3368 | else | |
3369 | set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT); | |
4e409299 | 3370 | set_gdbarch_char_signed (gdbarch, 0); |
7a78ae4e | 3371 | |
11269d7e | 3372 | set_gdbarch_frame_align (gdbarch, rs6000_frame_align); |
8b148df9 AC |
3373 | if (sysv_abi && wordsize == 8) |
3374 | /* PPC64 SYSV. */ | |
3375 | set_gdbarch_frame_red_zone_size (gdbarch, 288); | |
3376 | else if (!sysv_abi && wordsize == 4) | |
5bffac25 AC |
3377 | /* PowerOpen / AIX 32 bit. The saved area or red zone consists of |
3378 | 19 4 byte GPRS + 18 8 byte FPRs giving a total of 220 bytes. | |
3379 | Problem is, 220 isn't frame (16 byte) aligned. Round it up to | |
3380 | 224. */ | |
3381 | set_gdbarch_frame_red_zone_size (gdbarch, 224); | |
7a78ae4e | 3382 | |
691d145a JB |
3383 | set_gdbarch_convert_register_p (gdbarch, rs6000_convert_register_p); |
3384 | set_gdbarch_register_to_value (gdbarch, rs6000_register_to_value); | |
3385 | set_gdbarch_value_to_register (gdbarch, rs6000_value_to_register); | |
3386 | ||
18ed0c4e JB |
3387 | set_gdbarch_stab_reg_to_regnum (gdbarch, rs6000_stab_reg_to_regnum); |
3388 | set_gdbarch_dwarf2_reg_to_regnum (gdbarch, rs6000_dwarf2_reg_to_regnum); | |
d217aaed | 3389 | |
2ea5f656 | 3390 | if (sysv_abi && wordsize == 4) |
77b2b6d4 | 3391 | set_gdbarch_push_dummy_call (gdbarch, ppc_sysv_abi_push_dummy_call); |
8be9034a AC |
3392 | else if (sysv_abi && wordsize == 8) |
3393 | set_gdbarch_push_dummy_call (gdbarch, ppc64_sysv_abi_push_dummy_call); | |
9aa1e687 | 3394 | else |
77b2b6d4 | 3395 | set_gdbarch_push_dummy_call (gdbarch, rs6000_push_dummy_call); |
7a78ae4e | 3396 | |
7a78ae4e | 3397 | set_gdbarch_skip_prologue (gdbarch, rs6000_skip_prologue); |
0d1243d9 PG |
3398 | set_gdbarch_in_function_epilogue_p (gdbarch, rs6000_in_function_epilogue_p); |
3399 | ||
7a78ae4e | 3400 | set_gdbarch_inner_than (gdbarch, core_addr_lessthan); |
7a78ae4e ND |
3401 | set_gdbarch_breakpoint_from_pc (gdbarch, rs6000_breakpoint_from_pc); |
3402 | ||
6066c3de AC |
3403 | /* Handle the 64-bit SVR4 minimal-symbol convention of using "FN" |
3404 | for the descriptor and ".FN" for the entry-point -- a user | |
3405 | specifying "break FN" will unexpectedly end up with a breakpoint | |
3406 | on the descriptor and not the function. This architecture method | |
3407 | transforms any breakpoints on descriptors into breakpoints on the | |
3408 | corresponding entry point. */ | |
3409 | if (sysv_abi && wordsize == 8) | |
3410 | set_gdbarch_adjust_breakpoint_address (gdbarch, ppc64_sysv_abi_adjust_breakpoint_address); | |
3411 | ||
7a78ae4e ND |
3412 | /* Not sure on this. FIXMEmgo */ |
3413 | set_gdbarch_frame_args_skip (gdbarch, 8); | |
3414 | ||
15813d3f AC |
3415 | if (!sysv_abi) |
3416 | { | |
3417 | /* Handle RS/6000 function pointers (which are really function | |
3418 | descriptors). */ | |
f517ea4e PS |
3419 | set_gdbarch_convert_from_func_ptr_addr (gdbarch, |
3420 | rs6000_convert_from_func_ptr_addr); | |
9aa1e687 | 3421 | } |
7a78ae4e | 3422 | |
143985b7 AF |
3423 | /* Helpers for function argument information. */ |
3424 | set_gdbarch_fetch_pointer_argument (gdbarch, rs6000_fetch_pointer_argument); | |
3425 | ||
6f7f3f0d UW |
3426 | /* Trampoline. */ |
3427 | set_gdbarch_in_solib_return_trampoline | |
3428 | (gdbarch, rs6000_in_solib_return_trampoline); | |
3429 | set_gdbarch_skip_trampoline_code (gdbarch, rs6000_skip_trampoline_code); | |
3430 | ||
7b112f9c | 3431 | /* Hook in ABI-specific overrides, if they have been registered. */ |
4be87837 | 3432 | gdbarch_init_osabi (info, gdbarch); |
7b112f9c | 3433 | |
61a65099 KB |
3434 | switch (info.osabi) |
3435 | { | |
f5aecab8 PG |
3436 | case GDB_OSABI_LINUX: |
3437 | /* FIXME: pgilliam/2005-10-21: Assume all PowerPC 64-bit linux systems | |
3438 | have altivec registers. If not, ptrace will fail the first time it's | |
3439 | called to access one and will not be called again. This wart will | |
3440 | be removed when Daniel Jacobowitz's proposal for autodetecting target | |
3441 | registers is implemented. */ | |
3442 | if ((v->arch == bfd_arch_powerpc) && ((v->mach)== bfd_mach_ppc64)) | |
3443 | { | |
3444 | tdep->ppc_vr0_regnum = 71; | |
3445 | tdep->ppc_vrsave_regnum = 104; | |
3446 | } | |
3447 | /* Fall Thru */ | |
61a65099 KB |
3448 | case GDB_OSABI_NETBSD_AOUT: |
3449 | case GDB_OSABI_NETBSD_ELF: | |
3450 | case GDB_OSABI_UNKNOWN: | |
61a65099 KB |
3451 | set_gdbarch_unwind_pc (gdbarch, rs6000_unwind_pc); |
3452 | frame_unwind_append_sniffer (gdbarch, rs6000_frame_sniffer); | |
3453 | set_gdbarch_unwind_dummy_id (gdbarch, rs6000_unwind_dummy_id); | |
3454 | frame_base_append_sniffer (gdbarch, rs6000_frame_base_sniffer); | |
3455 | break; | |
3456 | default: | |
61a65099 | 3457 | set_gdbarch_believe_pcc_promotion (gdbarch, 1); |
81332287 KB |
3458 | |
3459 | set_gdbarch_unwind_pc (gdbarch, rs6000_unwind_pc); | |
3460 | frame_unwind_append_sniffer (gdbarch, rs6000_frame_sniffer); | |
3461 | set_gdbarch_unwind_dummy_id (gdbarch, rs6000_unwind_dummy_id); | |
3462 | frame_base_append_sniffer (gdbarch, rs6000_frame_base_sniffer); | |
61a65099 KB |
3463 | } |
3464 | ||
9f643768 JB |
3465 | init_sim_regno_table (gdbarch); |
3466 | ||
7a78ae4e | 3467 | return gdbarch; |
c906108c SS |
3468 | } |
3469 | ||
7b112f9c JT |
3470 | static void |
3471 | rs6000_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file) | |
3472 | { | |
3473 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); | |
3474 | ||
3475 | if (tdep == NULL) | |
3476 | return; | |
3477 | ||
4be87837 | 3478 | /* FIXME: Dump gdbarch_tdep. */ |
7b112f9c JT |
3479 | } |
3480 | ||
c906108c SS |
3481 | /* Initialization code. */ |
3482 | ||
a78f21af | 3483 | extern initialize_file_ftype _initialize_rs6000_tdep; /* -Wmissing-prototypes */ |
b9362cc7 | 3484 | |
c906108c | 3485 | void |
fba45db2 | 3486 | _initialize_rs6000_tdep (void) |
c906108c | 3487 | { |
7b112f9c JT |
3488 | gdbarch_register (bfd_arch_rs6000, rs6000_gdbarch_init, rs6000_dump_tdep); |
3489 | gdbarch_register (bfd_arch_powerpc, rs6000_gdbarch_init, rs6000_dump_tdep); | |
c906108c | 3490 | } |