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 | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 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 | 19 | You should have received a copy of the GNU General Public License |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
21 | |
22 | #include "defs.h" | |
23 | #include "frame.h" | |
24 | #include "inferior.h" | |
25 | #include "symtab.h" | |
26 | #include "target.h" | |
27 | #include "gdbcore.h" | |
28 | #include "gdbcmd.h" | |
c906108c | 29 | #include "objfiles.h" |
7a78ae4e | 30 | #include "arch-utils.h" |
4e052eda | 31 | #include "regcache.h" |
d195bc9f | 32 | #include "regset.h" |
d16aafd8 | 33 | #include "doublest.h" |
fd0407d6 | 34 | #include "value.h" |
1fcc0bb8 | 35 | #include "parser-defs.h" |
4be87837 | 36 | #include "osabi.h" |
7d9b040b | 37 | #include "infcall.h" |
9f643768 JB |
38 | #include "sim-regno.h" |
39 | #include "gdb/sim-ppc.h" | |
6ced10dd | 40 | #include "reggroups.h" |
4fc771b8 | 41 | #include "dwarf2-frame.h" |
7a78ae4e | 42 | |
2fccf04a | 43 | #include "libbfd.h" /* for bfd_default_set_arch_mach */ |
7a78ae4e | 44 | #include "coff/internal.h" /* for libcoff.h */ |
2fccf04a | 45 | #include "libcoff.h" /* for xcoff_data */ |
11ed25ac KB |
46 | #include "coff/xcoff.h" |
47 | #include "libxcoff.h" | |
7a78ae4e | 48 | |
9aa1e687 | 49 | #include "elf-bfd.h" |
7a78ae4e | 50 | |
6ded7999 | 51 | #include "solib-svr4.h" |
9aa1e687 | 52 | #include "ppc-tdep.h" |
7a78ae4e | 53 | |
338ef23d | 54 | #include "gdb_assert.h" |
a89aa300 | 55 | #include "dis-asm.h" |
338ef23d | 56 | |
61a65099 KB |
57 | #include "trad-frame.h" |
58 | #include "frame-unwind.h" | |
59 | #include "frame-base.h" | |
60 | ||
1f82754b | 61 | #include "rs6000-tdep.h" |
c44ca51c | 62 | |
7a78ae4e ND |
63 | /* If the kernel has to deliver a signal, it pushes a sigcontext |
64 | structure on the stack and then calls the signal handler, passing | |
65 | the address of the sigcontext in an argument register. Usually | |
66 | the signal handler doesn't save this register, so we have to | |
67 | access the sigcontext structure via an offset from the signal handler | |
68 | frame. | |
69 | The following constants were determined by experimentation on AIX 3.2. */ | |
70 | #define SIG_FRAME_PC_OFFSET 96 | |
71 | #define SIG_FRAME_LR_OFFSET 108 | |
72 | #define SIG_FRAME_FP_OFFSET 284 | |
73 | ||
7a78ae4e ND |
74 | /* To be used by skip_prologue. */ |
75 | ||
76 | struct rs6000_framedata | |
77 | { | |
78 | int offset; /* total size of frame --- the distance | |
79 | by which we decrement sp to allocate | |
80 | the frame */ | |
81 | int saved_gpr; /* smallest # of saved gpr */ | |
82 | int saved_fpr; /* smallest # of saved fpr */ | |
6be8bc0c | 83 | int saved_vr; /* smallest # of saved vr */ |
96ff0de4 | 84 | int saved_ev; /* smallest # of saved ev */ |
7a78ae4e ND |
85 | int alloca_reg; /* alloca register number (frame ptr) */ |
86 | char frameless; /* true if frameless functions. */ | |
87 | char nosavedpc; /* true if pc not saved. */ | |
88 | int gpr_offset; /* offset of saved gprs from prev sp */ | |
89 | int fpr_offset; /* offset of saved fprs from prev sp */ | |
6be8bc0c | 90 | int vr_offset; /* offset of saved vrs from prev sp */ |
96ff0de4 | 91 | int ev_offset; /* offset of saved evs from prev sp */ |
7a78ae4e ND |
92 | int lr_offset; /* offset of saved lr */ |
93 | int cr_offset; /* offset of saved cr */ | |
6be8bc0c | 94 | int vrsave_offset; /* offset of saved vrsave register */ |
7a78ae4e ND |
95 | }; |
96 | ||
97 | /* Description of a single register. */ | |
98 | ||
99 | struct reg | |
100 | { | |
101 | char *name; /* name of register */ | |
0bcc32ae JB |
102 | unsigned char sz32; /* size on 32-bit arch, 0 if nonexistent */ |
103 | unsigned char sz64; /* size on 64-bit arch, 0 if nonexistent */ | |
7a78ae4e | 104 | unsigned char fpr; /* whether register is floating-point */ |
489461e2 | 105 | unsigned char pseudo; /* whether register is pseudo */ |
13ac140c JB |
106 | int spr_num; /* PowerPC SPR number, or -1 if not an SPR. |
107 | This is an ISA SPR number, not a GDB | |
108 | register number. */ | |
7a78ae4e ND |
109 | }; |
110 | ||
c906108c SS |
111 | /* Hook for determining the TOC address when calling functions in the |
112 | inferior under AIX. The initialization code in rs6000-nat.c sets | |
113 | this hook to point to find_toc_address. */ | |
114 | ||
7a78ae4e ND |
115 | CORE_ADDR (*rs6000_find_toc_address_hook) (CORE_ADDR) = NULL; |
116 | ||
c906108c SS |
117 | /* Static function prototypes */ |
118 | ||
0b1b3e42 UW |
119 | static CORE_ADDR branch_dest (struct frame_info *frame, int opcode, |
120 | int instr, CORE_ADDR pc, CORE_ADDR safety); | |
077276e8 KB |
121 | static CORE_ADDR skip_prologue (CORE_ADDR, CORE_ADDR, |
122 | struct rs6000_framedata *); | |
c906108c | 123 | |
64b84175 KB |
124 | /* Is REGNO an AltiVec register? Return 1 if so, 0 otherwise. */ |
125 | int | |
126 | altivec_register_p (int regno) | |
127 | { | |
128 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); | |
129 | if (tdep->ppc_vr0_regnum < 0 || tdep->ppc_vrsave_regnum < 0) | |
130 | return 0; | |
131 | else | |
132 | return (regno >= tdep->ppc_vr0_regnum && regno <= tdep->ppc_vrsave_regnum); | |
133 | } | |
134 | ||
383f0f5b | 135 | |
867e2dc5 JB |
136 | /* Return true if REGNO is an SPE register, false otherwise. */ |
137 | int | |
138 | spe_register_p (int regno) | |
139 | { | |
140 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); | |
141 | ||
142 | /* Is it a reference to EV0 -- EV31, and do we have those? */ | |
143 | if (tdep->ppc_ev0_regnum >= 0 | |
144 | && tdep->ppc_ev31_regnum >= 0 | |
145 | && tdep->ppc_ev0_regnum <= regno && regno <= tdep->ppc_ev31_regnum) | |
146 | return 1; | |
147 | ||
6ced10dd JB |
148 | /* Is it a reference to one of the raw upper GPR halves? */ |
149 | if (tdep->ppc_ev0_upper_regnum >= 0 | |
150 | && tdep->ppc_ev0_upper_regnum <= regno | |
151 | && regno < tdep->ppc_ev0_upper_regnum + ppc_num_gprs) | |
152 | return 1; | |
153 | ||
867e2dc5 JB |
154 | /* Is it a reference to the 64-bit accumulator, and do we have that? */ |
155 | if (tdep->ppc_acc_regnum >= 0 | |
156 | && tdep->ppc_acc_regnum == regno) | |
157 | return 1; | |
158 | ||
159 | /* Is it a reference to the SPE floating-point status and control register, | |
160 | and do we have that? */ | |
161 | if (tdep->ppc_spefscr_regnum >= 0 | |
162 | && tdep->ppc_spefscr_regnum == regno) | |
163 | return 1; | |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
168 | ||
383f0f5b JB |
169 | /* Return non-zero if the architecture described by GDBARCH has |
170 | floating-point registers (f0 --- f31 and fpscr). */ | |
0a613259 AC |
171 | int |
172 | ppc_floating_point_unit_p (struct gdbarch *gdbarch) | |
173 | { | |
383f0f5b JB |
174 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
175 | ||
176 | return (tdep->ppc_fp0_regnum >= 0 | |
177 | && tdep->ppc_fpscr_regnum >= 0); | |
0a613259 | 178 | } |
9f643768 | 179 | |
09991fa0 JB |
180 | |
181 | /* Check that TABLE[GDB_REGNO] is not already initialized, and then | |
182 | set it to SIM_REGNO. | |
183 | ||
184 | This is a helper function for init_sim_regno_table, constructing | |
185 | the table mapping GDB register numbers to sim register numbers; we | |
186 | initialize every element in that table to -1 before we start | |
187 | filling it in. */ | |
9f643768 JB |
188 | static void |
189 | set_sim_regno (int *table, int gdb_regno, int sim_regno) | |
190 | { | |
191 | /* Make sure we don't try to assign any given GDB register a sim | |
192 | register number more than once. */ | |
193 | gdb_assert (table[gdb_regno] == -1); | |
194 | table[gdb_regno] = sim_regno; | |
195 | } | |
196 | ||
09991fa0 JB |
197 | |
198 | /* Initialize ARCH->tdep->sim_regno, the table mapping GDB register | |
199 | numbers to simulator register numbers, based on the values placed | |
200 | in the ARCH->tdep->ppc_foo_regnum members. */ | |
9f643768 JB |
201 | static void |
202 | init_sim_regno_table (struct gdbarch *arch) | |
203 | { | |
204 | struct gdbarch_tdep *tdep = gdbarch_tdep (arch); | |
205 | int total_regs = gdbarch_num_regs (arch) + gdbarch_num_pseudo_regs (arch); | |
206 | const struct reg *regs = tdep->regs; | |
207 | int *sim_regno = GDBARCH_OBSTACK_CALLOC (arch, total_regs, int); | |
208 | int i; | |
209 | ||
210 | /* Presume that all registers not explicitly mentioned below are | |
211 | unavailable from the sim. */ | |
212 | for (i = 0; i < total_regs; i++) | |
213 | sim_regno[i] = -1; | |
214 | ||
215 | /* General-purpose registers. */ | |
216 | for (i = 0; i < ppc_num_gprs; i++) | |
217 | set_sim_regno (sim_regno, tdep->ppc_gp0_regnum + i, sim_ppc_r0_regnum + i); | |
218 | ||
219 | /* Floating-point registers. */ | |
220 | if (tdep->ppc_fp0_regnum >= 0) | |
221 | for (i = 0; i < ppc_num_fprs; i++) | |
222 | set_sim_regno (sim_regno, | |
223 | tdep->ppc_fp0_regnum + i, | |
224 | sim_ppc_f0_regnum + i); | |
225 | if (tdep->ppc_fpscr_regnum >= 0) | |
226 | set_sim_regno (sim_regno, tdep->ppc_fpscr_regnum, sim_ppc_fpscr_regnum); | |
227 | ||
228 | set_sim_regno (sim_regno, gdbarch_pc_regnum (arch), sim_ppc_pc_regnum); | |
229 | set_sim_regno (sim_regno, tdep->ppc_ps_regnum, sim_ppc_ps_regnum); | |
230 | set_sim_regno (sim_regno, tdep->ppc_cr_regnum, sim_ppc_cr_regnum); | |
231 | ||
232 | /* Segment registers. */ | |
233 | if (tdep->ppc_sr0_regnum >= 0) | |
234 | for (i = 0; i < ppc_num_srs; i++) | |
235 | set_sim_regno (sim_regno, | |
236 | tdep->ppc_sr0_regnum + i, | |
237 | sim_ppc_sr0_regnum + i); | |
238 | ||
239 | /* Altivec registers. */ | |
240 | if (tdep->ppc_vr0_regnum >= 0) | |
241 | { | |
242 | for (i = 0; i < ppc_num_vrs; i++) | |
243 | set_sim_regno (sim_regno, | |
244 | tdep->ppc_vr0_regnum + i, | |
245 | sim_ppc_vr0_regnum + i); | |
246 | ||
247 | /* FIXME: jimb/2004-07-15: when we have tdep->ppc_vscr_regnum, | |
248 | we can treat this more like the other cases. */ | |
249 | set_sim_regno (sim_regno, | |
250 | tdep->ppc_vr0_regnum + ppc_num_vrs, | |
251 | sim_ppc_vscr_regnum); | |
252 | } | |
253 | /* vsave is a special-purpose register, so the code below handles it. */ | |
254 | ||
255 | /* SPE APU (E500) registers. */ | |
256 | if (tdep->ppc_ev0_regnum >= 0) | |
257 | for (i = 0; i < ppc_num_gprs; i++) | |
258 | set_sim_regno (sim_regno, | |
259 | tdep->ppc_ev0_regnum + i, | |
260 | sim_ppc_ev0_regnum + i); | |
6ced10dd JB |
261 | if (tdep->ppc_ev0_upper_regnum >= 0) |
262 | for (i = 0; i < ppc_num_gprs; i++) | |
263 | set_sim_regno (sim_regno, | |
264 | tdep->ppc_ev0_upper_regnum + i, | |
265 | sim_ppc_rh0_regnum + i); | |
9f643768 JB |
266 | if (tdep->ppc_acc_regnum >= 0) |
267 | set_sim_regno (sim_regno, tdep->ppc_acc_regnum, sim_ppc_acc_regnum); | |
268 | /* spefscr is a special-purpose register, so the code below handles it. */ | |
269 | ||
270 | /* Now handle all special-purpose registers. Verify that they | |
271 | haven't mistakenly been assigned numbers by any of the above | |
272 | code). */ | |
273 | for (i = 0; i < total_regs; i++) | |
274 | if (regs[i].spr_num >= 0) | |
275 | set_sim_regno (sim_regno, i, regs[i].spr_num + sim_ppc_spr0_regnum); | |
276 | ||
277 | /* Drop the initialized array into place. */ | |
278 | tdep->sim_regno = sim_regno; | |
279 | } | |
280 | ||
09991fa0 JB |
281 | |
282 | /* Given a GDB register number REG, return the corresponding SIM | |
283 | register number. */ | |
9f643768 JB |
284 | static int |
285 | rs6000_register_sim_regno (int reg) | |
286 | { | |
287 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); | |
288 | int sim_regno; | |
289 | ||
f57d151a UW |
290 | gdb_assert (0 <= reg |
291 | && reg <= gdbarch_num_regs (current_gdbarch) | |
292 | + gdbarch_num_pseudo_regs (current_gdbarch)); | |
9f643768 JB |
293 | sim_regno = tdep->sim_regno[reg]; |
294 | ||
295 | if (sim_regno >= 0) | |
296 | return sim_regno; | |
297 | else | |
298 | return LEGACY_SIM_REGNO_IGNORE; | |
299 | } | |
300 | ||
d195bc9f MK |
301 | \f |
302 | ||
303 | /* Register set support functions. */ | |
304 | ||
f2db237a AM |
305 | /* REGS + OFFSET contains register REGNUM in a field REGSIZE wide. |
306 | Write the register to REGCACHE. */ | |
307 | ||
d195bc9f MK |
308 | static void |
309 | ppc_supply_reg (struct regcache *regcache, int regnum, | |
f2db237a | 310 | const gdb_byte *regs, size_t offset, int regsize) |
d195bc9f MK |
311 | { |
312 | if (regnum != -1 && offset != -1) | |
f2db237a AM |
313 | { |
314 | if (regsize > 4) | |
315 | { | |
316 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
317 | int gdb_regsize = register_size (gdbarch, regnum); | |
318 | if (gdb_regsize < regsize | |
319 | && gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) | |
320 | offset += regsize - gdb_regsize; | |
321 | } | |
322 | regcache_raw_supply (regcache, regnum, regs + offset); | |
323 | } | |
d195bc9f MK |
324 | } |
325 | ||
f2db237a AM |
326 | /* Read register REGNUM from REGCACHE and store to REGS + OFFSET |
327 | in a field REGSIZE wide. Zero pad as necessary. */ | |
328 | ||
d195bc9f MK |
329 | static void |
330 | ppc_collect_reg (const struct regcache *regcache, int regnum, | |
f2db237a | 331 | gdb_byte *regs, size_t offset, int regsize) |
d195bc9f MK |
332 | { |
333 | if (regnum != -1 && offset != -1) | |
f2db237a AM |
334 | { |
335 | if (regsize > 4) | |
336 | { | |
337 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
338 | int gdb_regsize = register_size (gdbarch, regnum); | |
339 | if (gdb_regsize < regsize) | |
340 | { | |
341 | if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) | |
342 | { | |
343 | memset (regs + offset, 0, regsize - gdb_regsize); | |
344 | offset += regsize - gdb_regsize; | |
345 | } | |
346 | else | |
347 | memset (regs + offset + regsize - gdb_regsize, 0, | |
348 | regsize - gdb_regsize); | |
349 | } | |
350 | } | |
351 | regcache_raw_collect (regcache, regnum, regs + offset); | |
352 | } | |
d195bc9f MK |
353 | } |
354 | ||
f2db237a AM |
355 | static int |
356 | ppc_greg_offset (struct gdbarch *gdbarch, | |
357 | struct gdbarch_tdep *tdep, | |
358 | const struct ppc_reg_offsets *offsets, | |
359 | int regnum, | |
360 | int *regsize) | |
361 | { | |
362 | *regsize = offsets->gpr_size; | |
363 | if (regnum >= tdep->ppc_gp0_regnum | |
364 | && regnum < tdep->ppc_gp0_regnum + ppc_num_gprs) | |
365 | return (offsets->r0_offset | |
366 | + (regnum - tdep->ppc_gp0_regnum) * offsets->gpr_size); | |
367 | ||
368 | if (regnum == gdbarch_pc_regnum (gdbarch)) | |
369 | return offsets->pc_offset; | |
370 | ||
371 | if (regnum == tdep->ppc_ps_regnum) | |
372 | return offsets->ps_offset; | |
373 | ||
374 | if (regnum == tdep->ppc_lr_regnum) | |
375 | return offsets->lr_offset; | |
376 | ||
377 | if (regnum == tdep->ppc_ctr_regnum) | |
378 | return offsets->ctr_offset; | |
379 | ||
380 | *regsize = offsets->xr_size; | |
381 | if (regnum == tdep->ppc_cr_regnum) | |
382 | return offsets->cr_offset; | |
383 | ||
384 | if (regnum == tdep->ppc_xer_regnum) | |
385 | return offsets->xer_offset; | |
386 | ||
387 | if (regnum == tdep->ppc_mq_regnum) | |
388 | return offsets->mq_offset; | |
389 | ||
390 | return -1; | |
391 | } | |
392 | ||
393 | static int | |
394 | ppc_fpreg_offset (struct gdbarch_tdep *tdep, | |
395 | const struct ppc_reg_offsets *offsets, | |
396 | int regnum) | |
397 | { | |
398 | if (regnum >= tdep->ppc_fp0_regnum | |
399 | && regnum < tdep->ppc_fp0_regnum + ppc_num_fprs) | |
400 | return offsets->f0_offset + (regnum - tdep->ppc_fp0_regnum) * 8; | |
401 | ||
402 | if (regnum == tdep->ppc_fpscr_regnum) | |
403 | return offsets->fpscr_offset; | |
404 | ||
405 | return -1; | |
406 | } | |
407 | ||
d195bc9f MK |
408 | /* Supply register REGNUM in the general-purpose register set REGSET |
409 | from the buffer specified by GREGS and LEN to register cache | |
410 | REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ | |
411 | ||
412 | void | |
413 | ppc_supply_gregset (const struct regset *regset, struct regcache *regcache, | |
414 | int regnum, const void *gregs, size_t len) | |
415 | { | |
416 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
417 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
418 | const struct ppc_reg_offsets *offsets = regset->descr; | |
419 | size_t offset; | |
f2db237a | 420 | int regsize; |
d195bc9f | 421 | |
f2db237a | 422 | if (regnum == -1) |
d195bc9f | 423 | { |
f2db237a AM |
424 | int i; |
425 | int gpr_size = offsets->gpr_size; | |
426 | ||
427 | for (i = tdep->ppc_gp0_regnum, offset = offsets->r0_offset; | |
428 | i < tdep->ppc_gp0_regnum + ppc_num_gprs; | |
429 | i++, offset += gpr_size) | |
430 | ppc_supply_reg (regcache, i, gregs, offset, gpr_size); | |
431 | ||
432 | ppc_supply_reg (regcache, gdbarch_pc_regnum (gdbarch), | |
433 | gregs, offsets->pc_offset, gpr_size); | |
434 | ppc_supply_reg (regcache, tdep->ppc_ps_regnum, | |
435 | gregs, offsets->ps_offset, gpr_size); | |
436 | ppc_supply_reg (regcache, tdep->ppc_lr_regnum, | |
437 | gregs, offsets->lr_offset, gpr_size); | |
438 | ppc_supply_reg (regcache, tdep->ppc_ctr_regnum, | |
439 | gregs, offsets->ctr_offset, gpr_size); | |
440 | ppc_supply_reg (regcache, tdep->ppc_cr_regnum, | |
441 | gregs, offsets->cr_offset, offsets->xr_size); | |
442 | ppc_supply_reg (regcache, tdep->ppc_xer_regnum, | |
443 | gregs, offsets->xer_offset, offsets->xr_size); | |
444 | ppc_supply_reg (regcache, tdep->ppc_mq_regnum, | |
445 | gregs, offsets->mq_offset, offsets->xr_size); | |
446 | return; | |
d195bc9f MK |
447 | } |
448 | ||
f2db237a AM |
449 | offset = ppc_greg_offset (gdbarch, tdep, offsets, regnum, ®size); |
450 | ppc_supply_reg (regcache, regnum, gregs, offset, regsize); | |
d195bc9f MK |
451 | } |
452 | ||
453 | /* Supply register REGNUM in the floating-point register set REGSET | |
454 | from the buffer specified by FPREGS and LEN to register cache | |
455 | REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ | |
456 | ||
457 | void | |
458 | ppc_supply_fpregset (const struct regset *regset, struct regcache *regcache, | |
459 | int regnum, const void *fpregs, size_t len) | |
460 | { | |
461 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
f2db237a AM |
462 | struct gdbarch_tdep *tdep; |
463 | const struct ppc_reg_offsets *offsets; | |
d195bc9f | 464 | size_t offset; |
d195bc9f | 465 | |
f2db237a AM |
466 | if (!ppc_floating_point_unit_p (gdbarch)) |
467 | return; | |
383f0f5b | 468 | |
f2db237a AM |
469 | tdep = gdbarch_tdep (gdbarch); |
470 | offsets = regset->descr; | |
471 | if (regnum == -1) | |
d195bc9f | 472 | { |
f2db237a AM |
473 | int i; |
474 | ||
475 | for (i = tdep->ppc_fp0_regnum, offset = offsets->f0_offset; | |
476 | i < tdep->ppc_fp0_regnum + ppc_num_fprs; | |
477 | i++, offset += 8) | |
478 | ppc_supply_reg (regcache, i, fpregs, offset, 8); | |
479 | ||
480 | ppc_supply_reg (regcache, tdep->ppc_fpscr_regnum, | |
481 | fpregs, offsets->fpscr_offset, offsets->fpscr_size); | |
482 | return; | |
d195bc9f MK |
483 | } |
484 | ||
f2db237a AM |
485 | offset = ppc_fpreg_offset (tdep, offsets, regnum); |
486 | ppc_supply_reg (regcache, regnum, fpregs, offset, | |
487 | regnum == tdep->ppc_fpscr_regnum ? offsets->fpscr_size : 8); | |
d195bc9f MK |
488 | } |
489 | ||
490 | /* Collect register REGNUM in the general-purpose register set | |
f2db237a | 491 | REGSET from register cache REGCACHE into the buffer specified by |
d195bc9f MK |
492 | GREGS and LEN. If REGNUM is -1, do this for all registers in |
493 | REGSET. */ | |
494 | ||
495 | void | |
496 | ppc_collect_gregset (const struct regset *regset, | |
497 | const struct regcache *regcache, | |
498 | int regnum, void *gregs, size_t len) | |
499 | { | |
500 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
501 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
502 | const struct ppc_reg_offsets *offsets = regset->descr; | |
503 | size_t offset; | |
f2db237a | 504 | int regsize; |
d195bc9f | 505 | |
f2db237a | 506 | if (regnum == -1) |
d195bc9f | 507 | { |
f2db237a AM |
508 | int i; |
509 | int gpr_size = offsets->gpr_size; | |
510 | ||
511 | for (i = tdep->ppc_gp0_regnum, offset = offsets->r0_offset; | |
512 | i < tdep->ppc_gp0_regnum + ppc_num_gprs; | |
513 | i++, offset += gpr_size) | |
514 | ppc_collect_reg (regcache, i, gregs, offset, gpr_size); | |
515 | ||
516 | ppc_collect_reg (regcache, gdbarch_pc_regnum (gdbarch), | |
517 | gregs, offsets->pc_offset, gpr_size); | |
518 | ppc_collect_reg (regcache, tdep->ppc_ps_regnum, | |
519 | gregs, offsets->ps_offset, gpr_size); | |
520 | ppc_collect_reg (regcache, tdep->ppc_lr_regnum, | |
521 | gregs, offsets->lr_offset, gpr_size); | |
522 | ppc_collect_reg (regcache, tdep->ppc_ctr_regnum, | |
523 | gregs, offsets->ctr_offset, gpr_size); | |
524 | ppc_collect_reg (regcache, tdep->ppc_cr_regnum, | |
525 | gregs, offsets->cr_offset, offsets->xr_size); | |
526 | ppc_collect_reg (regcache, tdep->ppc_xer_regnum, | |
527 | gregs, offsets->xer_offset, offsets->xr_size); | |
528 | ppc_collect_reg (regcache, tdep->ppc_mq_regnum, | |
529 | gregs, offsets->mq_offset, offsets->xr_size); | |
530 | return; | |
d195bc9f MK |
531 | } |
532 | ||
f2db237a AM |
533 | offset = ppc_greg_offset (gdbarch, tdep, offsets, regnum, ®size); |
534 | ppc_collect_reg (regcache, regnum, gregs, offset, regsize); | |
d195bc9f MK |
535 | } |
536 | ||
537 | /* Collect register REGNUM in the floating-point register set | |
f2db237a | 538 | REGSET from register cache REGCACHE into the buffer specified by |
d195bc9f MK |
539 | FPREGS and LEN. If REGNUM is -1, do this for all registers in |
540 | REGSET. */ | |
541 | ||
542 | void | |
543 | ppc_collect_fpregset (const struct regset *regset, | |
544 | const struct regcache *regcache, | |
545 | int regnum, void *fpregs, size_t len) | |
546 | { | |
547 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
f2db237a AM |
548 | struct gdbarch_tdep *tdep; |
549 | const struct ppc_reg_offsets *offsets; | |
d195bc9f | 550 | size_t offset; |
d195bc9f | 551 | |
f2db237a AM |
552 | if (!ppc_floating_point_unit_p (gdbarch)) |
553 | return; | |
383f0f5b | 554 | |
f2db237a AM |
555 | tdep = gdbarch_tdep (gdbarch); |
556 | offsets = regset->descr; | |
557 | if (regnum == -1) | |
d195bc9f | 558 | { |
f2db237a AM |
559 | int i; |
560 | ||
561 | for (i = tdep->ppc_fp0_regnum, offset = offsets->f0_offset; | |
562 | i < tdep->ppc_fp0_regnum + ppc_num_fprs; | |
563 | i++, offset += 8) | |
564 | ppc_collect_reg (regcache, i, fpregs, offset, 8); | |
565 | ||
566 | ppc_collect_reg (regcache, tdep->ppc_fpscr_regnum, | |
567 | fpregs, offsets->fpscr_offset, offsets->fpscr_size); | |
568 | return; | |
d195bc9f MK |
569 | } |
570 | ||
f2db237a AM |
571 | offset = ppc_fpreg_offset (tdep, offsets, regnum); |
572 | ppc_collect_reg (regcache, regnum, fpregs, offset, | |
573 | regnum == tdep->ppc_fpscr_regnum ? offsets->fpscr_size : 8); | |
d195bc9f MK |
574 | } |
575 | \f | |
0a613259 | 576 | |
7a78ae4e | 577 | /* Read a LEN-byte address from debugged memory address MEMADDR. */ |
c906108c | 578 | |
7a78ae4e ND |
579 | static CORE_ADDR |
580 | read_memory_addr (CORE_ADDR memaddr, int len) | |
581 | { | |
582 | return read_memory_unsigned_integer (memaddr, len); | |
583 | } | |
c906108c | 584 | |
7a78ae4e ND |
585 | static CORE_ADDR |
586 | rs6000_skip_prologue (CORE_ADDR pc) | |
b83266a0 SS |
587 | { |
588 | struct rs6000_framedata frame; | |
4e463ff5 DJ |
589 | CORE_ADDR limit_pc, func_addr; |
590 | ||
591 | /* See if we can determine the end of the prologue via the symbol table. | |
592 | If so, then return either PC, or the PC after the prologue, whichever | |
593 | is greater. */ | |
594 | if (find_pc_partial_function (pc, NULL, &func_addr, NULL)) | |
595 | { | |
596 | CORE_ADDR post_prologue_pc = skip_prologue_using_sal (func_addr); | |
597 | if (post_prologue_pc != 0) | |
598 | return max (pc, post_prologue_pc); | |
599 | } | |
600 | ||
601 | /* Can't determine prologue from the symbol table, need to examine | |
602 | instructions. */ | |
603 | ||
604 | /* Find an upper limit on the function prologue using the debug | |
605 | information. If the debug information could not be used to provide | |
606 | that bound, then use an arbitrary large number as the upper bound. */ | |
607 | limit_pc = skip_prologue_using_sal (pc); | |
608 | if (limit_pc == 0) | |
609 | limit_pc = pc + 100; /* Magic. */ | |
610 | ||
611 | pc = skip_prologue (pc, limit_pc, &frame); | |
b83266a0 SS |
612 | return pc; |
613 | } | |
614 | ||
0d1243d9 PG |
615 | static int |
616 | insn_changes_sp_or_jumps (unsigned long insn) | |
617 | { | |
618 | int opcode = (insn >> 26) & 0x03f; | |
619 | int sd = (insn >> 21) & 0x01f; | |
620 | int a = (insn >> 16) & 0x01f; | |
621 | int subcode = (insn >> 1) & 0x3ff; | |
622 | ||
623 | /* Changes the stack pointer. */ | |
624 | ||
625 | /* NOTE: There are many ways to change the value of a given register. | |
626 | The ways below are those used when the register is R1, the SP, | |
627 | in a funtion's epilogue. */ | |
628 | ||
629 | if (opcode == 31 && subcode == 444 && a == 1) | |
630 | return 1; /* mr R1,Rn */ | |
631 | if (opcode == 14 && sd == 1) | |
632 | return 1; /* addi R1,Rn,simm */ | |
633 | if (opcode == 58 && sd == 1) | |
634 | return 1; /* ld R1,ds(Rn) */ | |
635 | ||
636 | /* Transfers control. */ | |
637 | ||
638 | if (opcode == 18) | |
639 | return 1; /* b */ | |
640 | if (opcode == 16) | |
641 | return 1; /* bc */ | |
642 | if (opcode == 19 && subcode == 16) | |
643 | return 1; /* bclr */ | |
644 | if (opcode == 19 && subcode == 528) | |
645 | return 1; /* bcctr */ | |
646 | ||
647 | return 0; | |
648 | } | |
649 | ||
650 | /* Return true if we are in the function's epilogue, i.e. after the | |
651 | instruction that destroyed the function's stack frame. | |
652 | ||
653 | 1) scan forward from the point of execution: | |
654 | a) If you find an instruction that modifies the stack pointer | |
655 | or transfers control (except a return), execution is not in | |
656 | an epilogue, return. | |
657 | b) Stop scanning if you find a return instruction or reach the | |
658 | end of the function or reach the hard limit for the size of | |
659 | an epilogue. | |
660 | 2) scan backward from the point of execution: | |
661 | a) If you find an instruction that modifies the stack pointer, | |
662 | execution *is* in an epilogue, return. | |
663 | b) Stop scanning if you reach an instruction that transfers | |
664 | control or the beginning of the function or reach the hard | |
665 | limit for the size of an epilogue. */ | |
666 | ||
667 | static int | |
668 | rs6000_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc) | |
669 | { | |
670 | bfd_byte insn_buf[PPC_INSN_SIZE]; | |
671 | CORE_ADDR scan_pc, func_start, func_end, epilogue_start, epilogue_end; | |
672 | unsigned long insn; | |
673 | struct frame_info *curfrm; | |
674 | ||
675 | /* Find the search limits based on function boundaries and hard limit. */ | |
676 | ||
677 | if (!find_pc_partial_function (pc, NULL, &func_start, &func_end)) | |
678 | return 0; | |
679 | ||
680 | epilogue_start = pc - PPC_MAX_EPILOGUE_INSTRUCTIONS * PPC_INSN_SIZE; | |
681 | if (epilogue_start < func_start) epilogue_start = func_start; | |
682 | ||
683 | epilogue_end = pc + PPC_MAX_EPILOGUE_INSTRUCTIONS * PPC_INSN_SIZE; | |
684 | if (epilogue_end > func_end) epilogue_end = func_end; | |
685 | ||
686 | curfrm = get_current_frame (); | |
687 | ||
688 | /* Scan forward until next 'blr'. */ | |
689 | ||
690 | for (scan_pc = pc; scan_pc < epilogue_end; scan_pc += PPC_INSN_SIZE) | |
691 | { | |
692 | if (!safe_frame_unwind_memory (curfrm, scan_pc, insn_buf, PPC_INSN_SIZE)) | |
693 | return 0; | |
4e463ff5 | 694 | insn = extract_unsigned_integer (insn_buf, PPC_INSN_SIZE); |
0d1243d9 PG |
695 | if (insn == 0x4e800020) |
696 | break; | |
697 | if (insn_changes_sp_or_jumps (insn)) | |
698 | return 0; | |
699 | } | |
700 | ||
701 | /* Scan backward until adjustment to stack pointer (R1). */ | |
702 | ||
703 | for (scan_pc = pc - PPC_INSN_SIZE; | |
704 | scan_pc >= epilogue_start; | |
705 | scan_pc -= PPC_INSN_SIZE) | |
706 | { | |
707 | if (!safe_frame_unwind_memory (curfrm, scan_pc, insn_buf, PPC_INSN_SIZE)) | |
708 | return 0; | |
4e463ff5 | 709 | insn = extract_unsigned_integer (insn_buf, PPC_INSN_SIZE); |
0d1243d9 PG |
710 | if (insn_changes_sp_or_jumps (insn)) |
711 | return 1; | |
712 | } | |
713 | ||
714 | return 0; | |
715 | } | |
716 | ||
143985b7 | 717 | /* Get the ith function argument for the current function. */ |
b9362cc7 | 718 | static CORE_ADDR |
143985b7 AF |
719 | rs6000_fetch_pointer_argument (struct frame_info *frame, int argi, |
720 | struct type *type) | |
721 | { | |
50fd1280 | 722 | return get_frame_register_unsigned (frame, 3 + argi); |
143985b7 AF |
723 | } |
724 | ||
c906108c SS |
725 | /* Calculate the destination of a branch/jump. Return -1 if not a branch. */ |
726 | ||
727 | static CORE_ADDR | |
0b1b3e42 UW |
728 | branch_dest (struct frame_info *frame, int opcode, int instr, |
729 | CORE_ADDR pc, CORE_ADDR safety) | |
c906108c | 730 | { |
0b1b3e42 | 731 | struct gdbarch_tdep *tdep = gdbarch_tdep (get_frame_arch (frame)); |
c906108c SS |
732 | CORE_ADDR dest; |
733 | int immediate; | |
734 | int absolute; | |
735 | int ext_op; | |
736 | ||
737 | absolute = (int) ((instr >> 1) & 1); | |
738 | ||
c5aa993b JM |
739 | switch (opcode) |
740 | { | |
741 | case 18: | |
742 | immediate = ((instr & ~3) << 6) >> 6; /* br unconditional */ | |
743 | if (absolute) | |
744 | dest = immediate; | |
745 | else | |
746 | dest = pc + immediate; | |
747 | break; | |
748 | ||
749 | case 16: | |
750 | immediate = ((instr & ~3) << 16) >> 16; /* br conditional */ | |
751 | if (absolute) | |
752 | dest = immediate; | |
753 | else | |
754 | dest = pc + immediate; | |
755 | break; | |
756 | ||
757 | case 19: | |
758 | ext_op = (instr >> 1) & 0x3ff; | |
759 | ||
760 | if (ext_op == 16) /* br conditional register */ | |
761 | { | |
0b1b3e42 | 762 | dest = get_frame_register_unsigned (frame, tdep->ppc_lr_regnum) & ~3; |
c5aa993b JM |
763 | |
764 | /* If we are about to return from a signal handler, dest is | |
765 | something like 0x3c90. The current frame is a signal handler | |
766 | caller frame, upon completion of the sigreturn system call | |
767 | execution will return to the saved PC in the frame. */ | |
0b1b3e42 UW |
768 | if (dest < tdep->text_segment_base) |
769 | dest = read_memory_addr (get_frame_base (frame) + SIG_FRAME_PC_OFFSET, | |
770 | tdep->wordsize); | |
c5aa993b JM |
771 | } |
772 | ||
773 | else if (ext_op == 528) /* br cond to count reg */ | |
774 | { | |
0b1b3e42 | 775 | dest = get_frame_register_unsigned (frame, tdep->ppc_ctr_regnum) & ~3; |
c5aa993b JM |
776 | |
777 | /* If we are about to execute a system call, dest is something | |
778 | like 0x22fc or 0x3b00. Upon completion the system call | |
779 | will return to the address in the link register. */ | |
0b1b3e42 UW |
780 | if (dest < tdep->text_segment_base) |
781 | dest = get_frame_register_unsigned (frame, tdep->ppc_lr_regnum) & ~3; | |
c5aa993b JM |
782 | } |
783 | else | |
784 | return -1; | |
785 | break; | |
c906108c | 786 | |
c5aa993b JM |
787 | default: |
788 | return -1; | |
789 | } | |
0b1b3e42 | 790 | return (dest < tdep->text_segment_base) ? safety : dest; |
c906108c SS |
791 | } |
792 | ||
793 | ||
794 | /* Sequence of bytes for breakpoint instruction. */ | |
795 | ||
f4f9705a | 796 | const static unsigned char * |
7a78ae4e | 797 | rs6000_breakpoint_from_pc (CORE_ADDR *bp_addr, int *bp_size) |
c906108c | 798 | { |
aaab4dba AC |
799 | static unsigned char big_breakpoint[] = { 0x7d, 0x82, 0x10, 0x08 }; |
800 | static unsigned char little_breakpoint[] = { 0x08, 0x10, 0x82, 0x7d }; | |
c906108c | 801 | *bp_size = 4; |
4c6b5505 | 802 | if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG) |
c906108c SS |
803 | return big_breakpoint; |
804 | else | |
805 | return little_breakpoint; | |
806 | } | |
807 | ||
808 | ||
ce5eab59 UW |
809 | /* Instruction masks used during single-stepping of atomic sequences. */ |
810 | #define LWARX_MASK 0xfc0007fe | |
811 | #define LWARX_INSTRUCTION 0x7c000028 | |
812 | #define LDARX_INSTRUCTION 0x7c0000A8 | |
813 | #define STWCX_MASK 0xfc0007ff | |
814 | #define STWCX_INSTRUCTION 0x7c00012d | |
815 | #define STDCX_INSTRUCTION 0x7c0001ad | |
816 | #define BC_MASK 0xfc000000 | |
817 | #define BC_INSTRUCTION 0x40000000 | |
818 | ||
819 | /* Checks for an atomic sequence of instructions beginning with a LWARX/LDARX | |
820 | instruction and ending with a STWCX/STDCX instruction. If such a sequence | |
821 | is found, attempt to step through it. A breakpoint is placed at the end of | |
822 | the sequence. */ | |
823 | ||
824 | static int | |
0b1b3e42 | 825 | deal_with_atomic_sequence (struct frame_info *frame) |
ce5eab59 | 826 | { |
0b1b3e42 | 827 | CORE_ADDR pc = get_frame_pc (frame); |
ce5eab59 UW |
828 | CORE_ADDR breaks[2] = {-1, -1}; |
829 | CORE_ADDR loc = pc; | |
830 | CORE_ADDR branch_bp; /* Breakpoint at branch instruction's destination. */ | |
24d45690 | 831 | CORE_ADDR closing_insn; /* Instruction that closes the atomic sequence. */ |
ce5eab59 UW |
832 | int insn = read_memory_integer (loc, PPC_INSN_SIZE); |
833 | int insn_count; | |
834 | int index; | |
835 | int last_breakpoint = 0; /* Defaults to 0 (no breakpoints placed). */ | |
836 | const int atomic_sequence_length = 16; /* Instruction sequence length. */ | |
24d45690 | 837 | int opcode; /* Branch instruction's OPcode. */ |
ce5eab59 UW |
838 | int bc_insn_count = 0; /* Conditional branch instruction count. */ |
839 | ||
840 | /* Assume all atomic sequences start with a lwarx/ldarx instruction. */ | |
841 | if ((insn & LWARX_MASK) != LWARX_INSTRUCTION | |
842 | && (insn & LWARX_MASK) != LDARX_INSTRUCTION) | |
843 | return 0; | |
844 | ||
845 | /* Assume that no atomic sequence is longer than "atomic_sequence_length" | |
846 | instructions. */ | |
847 | for (insn_count = 0; insn_count < atomic_sequence_length; ++insn_count) | |
848 | { | |
849 | loc += PPC_INSN_SIZE; | |
850 | insn = read_memory_integer (loc, PPC_INSN_SIZE); | |
851 | ||
852 | /* Assume that there is at most one conditional branch in the atomic | |
853 | sequence. If a conditional branch is found, put a breakpoint in | |
854 | its destination address. */ | |
855 | if ((insn & BC_MASK) == BC_INSTRUCTION) | |
856 | { | |
857 | if (bc_insn_count >= 1) | |
858 | return 0; /* More than one conditional branch found, fallback | |
859 | to the standard single-step code. */ | |
860 | ||
24d45690 | 861 | opcode = insn >> 26; |
0b1b3e42 | 862 | branch_bp = branch_dest (frame, opcode, insn, pc, breaks[0]); |
ce5eab59 UW |
863 | |
864 | if (branch_bp != -1) | |
865 | { | |
866 | breaks[1] = branch_bp; | |
867 | bc_insn_count++; | |
868 | last_breakpoint++; | |
869 | } | |
870 | } | |
871 | ||
872 | if ((insn & STWCX_MASK) == STWCX_INSTRUCTION | |
873 | || (insn & STWCX_MASK) == STDCX_INSTRUCTION) | |
874 | break; | |
875 | } | |
876 | ||
877 | /* Assume that the atomic sequence ends with a stwcx/stdcx instruction. */ | |
878 | if ((insn & STWCX_MASK) != STWCX_INSTRUCTION | |
879 | && (insn & STWCX_MASK) != STDCX_INSTRUCTION) | |
880 | return 0; | |
881 | ||
24d45690 | 882 | closing_insn = loc; |
ce5eab59 UW |
883 | loc += PPC_INSN_SIZE; |
884 | insn = read_memory_integer (loc, PPC_INSN_SIZE); | |
885 | ||
886 | /* Insert a breakpoint right after the end of the atomic sequence. */ | |
887 | breaks[0] = loc; | |
888 | ||
24d45690 UW |
889 | /* Check for duplicated breakpoints. Check also for a breakpoint |
890 | placed (branch instruction's destination) at the stwcx/stdcx | |
891 | instruction, this resets the reservation and take us back to the | |
892 | lwarx/ldarx instruction at the beginning of the atomic sequence. */ | |
893 | if (last_breakpoint && ((breaks[1] == breaks[0]) | |
894 | || (breaks[1] == closing_insn))) | |
ce5eab59 UW |
895 | last_breakpoint = 0; |
896 | ||
897 | /* Effectively inserts the breakpoints. */ | |
898 | for (index = 0; index <= last_breakpoint; index++) | |
899 | insert_single_step_breakpoint (breaks[index]); | |
900 | ||
901 | return 1; | |
902 | } | |
903 | ||
904 | /* AIX does not support PT_STEP. Simulate it. */ | |
c906108c | 905 | |
e6590a1b | 906 | int |
0b1b3e42 | 907 | rs6000_software_single_step (struct frame_info *frame) |
c906108c | 908 | { |
7c40d541 KB |
909 | CORE_ADDR dummy; |
910 | int breakp_sz; | |
50fd1280 | 911 | const gdb_byte *breakp = rs6000_breakpoint_from_pc (&dummy, &breakp_sz); |
c906108c SS |
912 | int ii, insn; |
913 | CORE_ADDR loc; | |
914 | CORE_ADDR breaks[2]; | |
915 | int opcode; | |
916 | ||
0b1b3e42 | 917 | loc = get_frame_pc (frame); |
c906108c | 918 | |
e0cd558a | 919 | insn = read_memory_integer (loc, 4); |
c906108c | 920 | |
0b1b3e42 | 921 | if (deal_with_atomic_sequence (frame)) |
ce5eab59 UW |
922 | return 1; |
923 | ||
e0cd558a UW |
924 | breaks[0] = loc + breakp_sz; |
925 | opcode = insn >> 26; | |
0b1b3e42 | 926 | breaks[1] = branch_dest (frame, opcode, insn, loc, breaks[0]); |
c906108c | 927 | |
e0cd558a UW |
928 | /* Don't put two breakpoints on the same address. */ |
929 | if (breaks[1] == breaks[0]) | |
930 | breaks[1] = -1; | |
c906108c | 931 | |
e0cd558a UW |
932 | for (ii = 0; ii < 2; ++ii) |
933 | { | |
934 | /* ignore invalid breakpoint. */ | |
935 | if (breaks[ii] == -1) | |
936 | continue; | |
937 | insert_single_step_breakpoint (breaks[ii]); | |
c5aa993b | 938 | } |
c906108c | 939 | |
c906108c | 940 | errno = 0; /* FIXME, don't ignore errors! */ |
c5aa993b | 941 | /* What errors? {read,write}_memory call error(). */ |
e6590a1b | 942 | return 1; |
c906108c SS |
943 | } |
944 | ||
945 | ||
946 | /* return pc value after skipping a function prologue and also return | |
947 | information about a function frame. | |
948 | ||
949 | in struct rs6000_framedata fdata: | |
c5aa993b JM |
950 | - frameless is TRUE, if function does not have a frame. |
951 | - nosavedpc is TRUE, if function does not save %pc value in its frame. | |
952 | - offset is the initial size of this stack frame --- the amount by | |
953 | which we decrement the sp to allocate the frame. | |
954 | - saved_gpr is the number of the first saved gpr. | |
955 | - saved_fpr is the number of the first saved fpr. | |
6be8bc0c | 956 | - saved_vr is the number of the first saved vr. |
96ff0de4 | 957 | - saved_ev is the number of the first saved ev. |
c5aa993b JM |
958 | - alloca_reg is the number of the register used for alloca() handling. |
959 | Otherwise -1. | |
960 | - gpr_offset is the offset of the first saved gpr from the previous frame. | |
961 | - fpr_offset is the offset of the first saved fpr from the previous frame. | |
6be8bc0c | 962 | - vr_offset is the offset of the first saved vr from the previous frame. |
96ff0de4 | 963 | - ev_offset is the offset of the first saved ev from the previous frame. |
c5aa993b JM |
964 | - lr_offset is the offset of the saved lr |
965 | - cr_offset is the offset of the saved cr | |
6be8bc0c | 966 | - vrsave_offset is the offset of the saved vrsave register |
c5aa993b | 967 | */ |
c906108c SS |
968 | |
969 | #define SIGNED_SHORT(x) \ | |
970 | ((sizeof (short) == 2) \ | |
971 | ? ((int)(short)(x)) \ | |
972 | : ((int)((((x) & 0xffff) ^ 0x8000) - 0x8000))) | |
973 | ||
974 | #define GET_SRC_REG(x) (((x) >> 21) & 0x1f) | |
975 | ||
55d05f3b KB |
976 | /* Limit the number of skipped non-prologue instructions, as the examining |
977 | of the prologue is expensive. */ | |
978 | static int max_skip_non_prologue_insns = 10; | |
979 | ||
773df3e5 JB |
980 | /* Return nonzero if the given instruction OP can be part of the prologue |
981 | of a function and saves a parameter on the stack. FRAMEP should be | |
982 | set if one of the previous instructions in the function has set the | |
983 | Frame Pointer. */ | |
984 | ||
985 | static int | |
986 | store_param_on_stack_p (unsigned long op, int framep, int *r0_contains_arg) | |
987 | { | |
988 | /* Move parameters from argument registers to temporary register. */ | |
989 | if ((op & 0xfc0007fe) == 0x7c000378) /* mr(.) Rx,Ry */ | |
990 | { | |
991 | /* Rx must be scratch register r0. */ | |
992 | const int rx_regno = (op >> 16) & 31; | |
993 | /* Ry: Only r3 - r10 are used for parameter passing. */ | |
994 | const int ry_regno = GET_SRC_REG (op); | |
995 | ||
996 | if (rx_regno == 0 && ry_regno >= 3 && ry_regno <= 10) | |
997 | { | |
998 | *r0_contains_arg = 1; | |
999 | return 1; | |
1000 | } | |
1001 | else | |
1002 | return 0; | |
1003 | } | |
1004 | ||
1005 | /* Save a General Purpose Register on stack. */ | |
1006 | ||
1007 | if ((op & 0xfc1f0003) == 0xf8010000 || /* std Rx,NUM(r1) */ | |
1008 | (op & 0xfc1f0000) == 0xd8010000) /* stfd Rx,NUM(r1) */ | |
1009 | { | |
1010 | /* Rx: Only r3 - r10 are used for parameter passing. */ | |
1011 | const int rx_regno = GET_SRC_REG (op); | |
1012 | ||
1013 | return (rx_regno >= 3 && rx_regno <= 10); | |
1014 | } | |
1015 | ||
1016 | /* Save a General Purpose Register on stack via the Frame Pointer. */ | |
1017 | ||
1018 | if (framep && | |
1019 | ((op & 0xfc1f0000) == 0x901f0000 || /* st rx,NUM(r31) */ | |
1020 | (op & 0xfc1f0000) == 0x981f0000 || /* stb Rx,NUM(r31) */ | |
1021 | (op & 0xfc1f0000) == 0xd81f0000)) /* stfd Rx,NUM(r31) */ | |
1022 | { | |
1023 | /* Rx: Usually, only r3 - r10 are used for parameter passing. | |
1024 | However, the compiler sometimes uses r0 to hold an argument. */ | |
1025 | const int rx_regno = GET_SRC_REG (op); | |
1026 | ||
1027 | return ((rx_regno >= 3 && rx_regno <= 10) | |
1028 | || (rx_regno == 0 && *r0_contains_arg)); | |
1029 | } | |
1030 | ||
1031 | if ((op & 0xfc1f0000) == 0xfc010000) /* frsp, fp?,NUM(r1) */ | |
1032 | { | |
1033 | /* Only f2 - f8 are used for parameter passing. */ | |
1034 | const int src_regno = GET_SRC_REG (op); | |
1035 | ||
1036 | return (src_regno >= 2 && src_regno <= 8); | |
1037 | } | |
1038 | ||
1039 | if (framep && ((op & 0xfc1f0000) == 0xfc1f0000)) /* frsp, fp?,NUM(r31) */ | |
1040 | { | |
1041 | /* Only f2 - f8 are used for parameter passing. */ | |
1042 | const int src_regno = GET_SRC_REG (op); | |
1043 | ||
1044 | return (src_regno >= 2 && src_regno <= 8); | |
1045 | } | |
1046 | ||
1047 | /* Not an insn that saves a parameter on stack. */ | |
1048 | return 0; | |
1049 | } | |
55d05f3b | 1050 | |
3c77c82a DJ |
1051 | /* Assuming that INSN is a "bl" instruction located at PC, return |
1052 | nonzero if the destination of the branch is a "blrl" instruction. | |
1053 | ||
1054 | This sequence is sometimes found in certain function prologues. | |
1055 | It allows the function to load the LR register with a value that | |
1056 | they can use to access PIC data using PC-relative offsets. */ | |
1057 | ||
1058 | static int | |
1059 | bl_to_blrl_insn_p (CORE_ADDR pc, int insn) | |
1060 | { | |
0b1b3e42 UW |
1061 | CORE_ADDR dest; |
1062 | int immediate; | |
1063 | int absolute; | |
3c77c82a DJ |
1064 | int dest_insn; |
1065 | ||
0b1b3e42 UW |
1066 | absolute = (int) ((insn >> 1) & 1); |
1067 | immediate = ((insn & ~3) << 6) >> 6; | |
1068 | if (absolute) | |
1069 | dest = immediate; | |
1070 | else | |
1071 | dest = pc + immediate; | |
1072 | ||
3c77c82a DJ |
1073 | dest_insn = read_memory_integer (dest, 4); |
1074 | if ((dest_insn & 0xfc00ffff) == 0x4c000021) /* blrl */ | |
1075 | return 1; | |
1076 | ||
1077 | return 0; | |
1078 | } | |
1079 | ||
7a78ae4e | 1080 | static CORE_ADDR |
077276e8 | 1081 | skip_prologue (CORE_ADDR pc, CORE_ADDR lim_pc, struct rs6000_framedata *fdata) |
c906108c SS |
1082 | { |
1083 | CORE_ADDR orig_pc = pc; | |
55d05f3b | 1084 | CORE_ADDR last_prologue_pc = pc; |
6be8bc0c | 1085 | CORE_ADDR li_found_pc = 0; |
50fd1280 | 1086 | gdb_byte buf[4]; |
c906108c SS |
1087 | unsigned long op; |
1088 | long offset = 0; | |
6be8bc0c | 1089 | long vr_saved_offset = 0; |
482ca3f5 KB |
1090 | int lr_reg = -1; |
1091 | int cr_reg = -1; | |
6be8bc0c | 1092 | int vr_reg = -1; |
96ff0de4 EZ |
1093 | int ev_reg = -1; |
1094 | long ev_offset = 0; | |
6be8bc0c | 1095 | int vrsave_reg = -1; |
c906108c SS |
1096 | int reg; |
1097 | int framep = 0; | |
1098 | int minimal_toc_loaded = 0; | |
ddb20c56 | 1099 | int prev_insn_was_prologue_insn = 1; |
55d05f3b | 1100 | int num_skip_non_prologue_insns = 0; |
773df3e5 | 1101 | int r0_contains_arg = 0; |
96ff0de4 | 1102 | const struct bfd_arch_info *arch_info = gdbarch_bfd_arch_info (current_gdbarch); |
6f99cb26 | 1103 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
c906108c | 1104 | |
ddb20c56 | 1105 | memset (fdata, 0, sizeof (struct rs6000_framedata)); |
c906108c SS |
1106 | fdata->saved_gpr = -1; |
1107 | fdata->saved_fpr = -1; | |
6be8bc0c | 1108 | fdata->saved_vr = -1; |
96ff0de4 | 1109 | fdata->saved_ev = -1; |
c906108c SS |
1110 | fdata->alloca_reg = -1; |
1111 | fdata->frameless = 1; | |
1112 | fdata->nosavedpc = 1; | |
1113 | ||
55d05f3b | 1114 | for (;; pc += 4) |
c906108c | 1115 | { |
ddb20c56 KB |
1116 | /* Sometimes it isn't clear if an instruction is a prologue |
1117 | instruction or not. When we encounter one of these ambiguous | |
1118 | cases, we'll set prev_insn_was_prologue_insn to 0 (false). | |
1119 | Otherwise, we'll assume that it really is a prologue instruction. */ | |
1120 | if (prev_insn_was_prologue_insn) | |
1121 | last_prologue_pc = pc; | |
55d05f3b KB |
1122 | |
1123 | /* Stop scanning if we've hit the limit. */ | |
4e463ff5 | 1124 | if (pc >= lim_pc) |
55d05f3b KB |
1125 | break; |
1126 | ||
ddb20c56 KB |
1127 | prev_insn_was_prologue_insn = 1; |
1128 | ||
55d05f3b | 1129 | /* Fetch the instruction and convert it to an integer. */ |
ddb20c56 KB |
1130 | if (target_read_memory (pc, buf, 4)) |
1131 | break; | |
4e463ff5 | 1132 | op = extract_unsigned_integer (buf, 4); |
c906108c | 1133 | |
c5aa993b JM |
1134 | if ((op & 0xfc1fffff) == 0x7c0802a6) |
1135 | { /* mflr Rx */ | |
43b1ab88 AC |
1136 | /* Since shared library / PIC code, which needs to get its |
1137 | address at runtime, can appear to save more than one link | |
1138 | register vis: | |
1139 | ||
1140 | *INDENT-OFF* | |
1141 | stwu r1,-304(r1) | |
1142 | mflr r3 | |
1143 | bl 0xff570d0 (blrl) | |
1144 | stw r30,296(r1) | |
1145 | mflr r30 | |
1146 | stw r31,300(r1) | |
1147 | stw r3,308(r1); | |
1148 | ... | |
1149 | *INDENT-ON* | |
1150 | ||
1151 | remember just the first one, but skip over additional | |
1152 | ones. */ | |
721d14ba | 1153 | if (lr_reg == -1) |
43b1ab88 | 1154 | lr_reg = (op & 0x03e00000); |
773df3e5 JB |
1155 | if (lr_reg == 0) |
1156 | r0_contains_arg = 0; | |
c5aa993b | 1157 | continue; |
c5aa993b JM |
1158 | } |
1159 | else if ((op & 0xfc1fffff) == 0x7c000026) | |
1160 | { /* mfcr Rx */ | |
98f08d3d | 1161 | cr_reg = (op & 0x03e00000); |
773df3e5 JB |
1162 | if (cr_reg == 0) |
1163 | r0_contains_arg = 0; | |
c5aa993b | 1164 | continue; |
c906108c | 1165 | |
c906108c | 1166 | } |
c5aa993b JM |
1167 | else if ((op & 0xfc1f0000) == 0xd8010000) |
1168 | { /* stfd Rx,NUM(r1) */ | |
1169 | reg = GET_SRC_REG (op); | |
1170 | if (fdata->saved_fpr == -1 || fdata->saved_fpr > reg) | |
1171 | { | |
1172 | fdata->saved_fpr = reg; | |
1173 | fdata->fpr_offset = SIGNED_SHORT (op) + offset; | |
1174 | } | |
1175 | continue; | |
c906108c | 1176 | |
c5aa993b JM |
1177 | } |
1178 | else if (((op & 0xfc1f0000) == 0xbc010000) || /* stm Rx, NUM(r1) */ | |
7a78ae4e ND |
1179 | (((op & 0xfc1f0000) == 0x90010000 || /* st rx,NUM(r1) */ |
1180 | (op & 0xfc1f0003) == 0xf8010000) && /* std rx,NUM(r1) */ | |
1181 | (op & 0x03e00000) >= 0x01a00000)) /* rx >= r13 */ | |
c5aa993b JM |
1182 | { |
1183 | ||
1184 | reg = GET_SRC_REG (op); | |
1185 | if (fdata->saved_gpr == -1 || fdata->saved_gpr > reg) | |
1186 | { | |
1187 | fdata->saved_gpr = reg; | |
7a78ae4e | 1188 | if ((op & 0xfc1f0003) == 0xf8010000) |
98f08d3d | 1189 | op &= ~3UL; |
c5aa993b JM |
1190 | fdata->gpr_offset = SIGNED_SHORT (op) + offset; |
1191 | } | |
1192 | continue; | |
c906108c | 1193 | |
ddb20c56 KB |
1194 | } |
1195 | else if ((op & 0xffff0000) == 0x60000000) | |
1196 | { | |
96ff0de4 | 1197 | /* nop */ |
ddb20c56 KB |
1198 | /* Allow nops in the prologue, but do not consider them to |
1199 | be part of the prologue unless followed by other prologue | |
1200 | instructions. */ | |
1201 | prev_insn_was_prologue_insn = 0; | |
1202 | continue; | |
1203 | ||
c906108c | 1204 | } |
c5aa993b JM |
1205 | else if ((op & 0xffff0000) == 0x3c000000) |
1206 | { /* addis 0,0,NUM, used | |
1207 | for >= 32k frames */ | |
1208 | fdata->offset = (op & 0x0000ffff) << 16; | |
1209 | fdata->frameless = 0; | |
773df3e5 | 1210 | r0_contains_arg = 0; |
c5aa993b JM |
1211 | continue; |
1212 | ||
1213 | } | |
1214 | else if ((op & 0xffff0000) == 0x60000000) | |
1215 | { /* ori 0,0,NUM, 2nd ha | |
1216 | lf of >= 32k frames */ | |
1217 | fdata->offset |= (op & 0x0000ffff); | |
1218 | fdata->frameless = 0; | |
773df3e5 | 1219 | r0_contains_arg = 0; |
c5aa993b JM |
1220 | continue; |
1221 | ||
1222 | } | |
be723e22 | 1223 | else if (lr_reg >= 0 && |
98f08d3d KB |
1224 | /* std Rx, NUM(r1) || stdu Rx, NUM(r1) */ |
1225 | (((op & 0xffff0000) == (lr_reg | 0xf8010000)) || | |
1226 | /* stw Rx, NUM(r1) */ | |
1227 | ((op & 0xffff0000) == (lr_reg | 0x90010000)) || | |
1228 | /* stwu Rx, NUM(r1) */ | |
1229 | ((op & 0xffff0000) == (lr_reg | 0x94010000)))) | |
1230 | { /* where Rx == lr */ | |
1231 | fdata->lr_offset = offset; | |
c5aa993b | 1232 | fdata->nosavedpc = 0; |
be723e22 MS |
1233 | /* Invalidate lr_reg, but don't set it to -1. |
1234 | That would mean that it had never been set. */ | |
1235 | lr_reg = -2; | |
98f08d3d KB |
1236 | if ((op & 0xfc000003) == 0xf8000000 || /* std */ |
1237 | (op & 0xfc000000) == 0x90000000) /* stw */ | |
1238 | { | |
1239 | /* Does not update r1, so add displacement to lr_offset. */ | |
1240 | fdata->lr_offset += SIGNED_SHORT (op); | |
1241 | } | |
c5aa993b JM |
1242 | continue; |
1243 | ||
1244 | } | |
be723e22 | 1245 | else if (cr_reg >= 0 && |
98f08d3d KB |
1246 | /* std Rx, NUM(r1) || stdu Rx, NUM(r1) */ |
1247 | (((op & 0xffff0000) == (cr_reg | 0xf8010000)) || | |
1248 | /* stw Rx, NUM(r1) */ | |
1249 | ((op & 0xffff0000) == (cr_reg | 0x90010000)) || | |
1250 | /* stwu Rx, NUM(r1) */ | |
1251 | ((op & 0xffff0000) == (cr_reg | 0x94010000)))) | |
1252 | { /* where Rx == cr */ | |
1253 | fdata->cr_offset = offset; | |
be723e22 MS |
1254 | /* Invalidate cr_reg, but don't set it to -1. |
1255 | That would mean that it had never been set. */ | |
1256 | cr_reg = -2; | |
98f08d3d KB |
1257 | if ((op & 0xfc000003) == 0xf8000000 || |
1258 | (op & 0xfc000000) == 0x90000000) | |
1259 | { | |
1260 | /* Does not update r1, so add displacement to cr_offset. */ | |
1261 | fdata->cr_offset += SIGNED_SHORT (op); | |
1262 | } | |
c5aa993b JM |
1263 | continue; |
1264 | ||
1265 | } | |
721d14ba DJ |
1266 | else if ((op & 0xfe80ffff) == 0x42800005 && lr_reg != -1) |
1267 | { | |
1268 | /* bcl 20,xx,.+4 is used to get the current PC, with or without | |
1269 | prediction bits. If the LR has already been saved, we can | |
1270 | skip it. */ | |
1271 | continue; | |
1272 | } | |
c5aa993b JM |
1273 | else if (op == 0x48000005) |
1274 | { /* bl .+4 used in | |
1275 | -mrelocatable */ | |
1276 | continue; | |
1277 | ||
1278 | } | |
1279 | else if (op == 0x48000004) | |
1280 | { /* b .+4 (xlc) */ | |
1281 | break; | |
1282 | ||
c5aa993b | 1283 | } |
6be8bc0c EZ |
1284 | else if ((op & 0xffff0000) == 0x3fc00000 || /* addis 30,0,foo@ha, used |
1285 | in V.4 -mminimal-toc */ | |
c5aa993b JM |
1286 | (op & 0xffff0000) == 0x3bde0000) |
1287 | { /* addi 30,30,foo@l */ | |
1288 | continue; | |
c906108c | 1289 | |
c5aa993b JM |
1290 | } |
1291 | else if ((op & 0xfc000001) == 0x48000001) | |
1292 | { /* bl foo, | |
1293 | to save fprs??? */ | |
c906108c | 1294 | |
c5aa993b | 1295 | fdata->frameless = 0; |
3c77c82a DJ |
1296 | |
1297 | /* If the return address has already been saved, we can skip | |
1298 | calls to blrl (for PIC). */ | |
1299 | if (lr_reg != -1 && bl_to_blrl_insn_p (pc, op)) | |
1300 | continue; | |
1301 | ||
6be8bc0c | 1302 | /* Don't skip over the subroutine call if it is not within |
ebd98106 FF |
1303 | the first three instructions of the prologue and either |
1304 | we have no line table information or the line info tells | |
1305 | us that the subroutine call is not part of the line | |
1306 | associated with the prologue. */ | |
c5aa993b | 1307 | if ((pc - orig_pc) > 8) |
ebd98106 FF |
1308 | { |
1309 | struct symtab_and_line prologue_sal = find_pc_line (orig_pc, 0); | |
1310 | struct symtab_and_line this_sal = find_pc_line (pc, 0); | |
1311 | ||
1312 | if ((prologue_sal.line == 0) || (prologue_sal.line != this_sal.line)) | |
1313 | break; | |
1314 | } | |
c5aa993b JM |
1315 | |
1316 | op = read_memory_integer (pc + 4, 4); | |
1317 | ||
6be8bc0c EZ |
1318 | /* At this point, make sure this is not a trampoline |
1319 | function (a function that simply calls another functions, | |
1320 | and nothing else). If the next is not a nop, this branch | |
1321 | was part of the function prologue. */ | |
c5aa993b JM |
1322 | |
1323 | if (op == 0x4def7b82 || op == 0) /* crorc 15, 15, 15 */ | |
1324 | break; /* don't skip over | |
1325 | this branch */ | |
1326 | continue; | |
1327 | ||
c5aa993b | 1328 | } |
98f08d3d KB |
1329 | /* update stack pointer */ |
1330 | else if ((op & 0xfc1f0000) == 0x94010000) | |
1331 | { /* stu rX,NUM(r1) || stwu rX,NUM(r1) */ | |
c5aa993b JM |
1332 | fdata->frameless = 0; |
1333 | fdata->offset = SIGNED_SHORT (op); | |
1334 | offset = fdata->offset; | |
1335 | continue; | |
c5aa993b | 1336 | } |
98f08d3d KB |
1337 | else if ((op & 0xfc1f016a) == 0x7c01016e) |
1338 | { /* stwux rX,r1,rY */ | |
1339 | /* no way to figure out what r1 is going to be */ | |
1340 | fdata->frameless = 0; | |
1341 | offset = fdata->offset; | |
1342 | continue; | |
1343 | } | |
1344 | else if ((op & 0xfc1f0003) == 0xf8010001) | |
1345 | { /* stdu rX,NUM(r1) */ | |
1346 | fdata->frameless = 0; | |
1347 | fdata->offset = SIGNED_SHORT (op & ~3UL); | |
1348 | offset = fdata->offset; | |
1349 | continue; | |
1350 | } | |
1351 | else if ((op & 0xfc1f016a) == 0x7c01016a) | |
1352 | { /* stdux rX,r1,rY */ | |
1353 | /* no way to figure out what r1 is going to be */ | |
c5aa993b JM |
1354 | fdata->frameless = 0; |
1355 | offset = fdata->offset; | |
1356 | continue; | |
c5aa993b | 1357 | } |
7313566f FF |
1358 | else if ((op & 0xffff0000) == 0x38210000) |
1359 | { /* addi r1,r1,SIMM */ | |
1360 | fdata->frameless = 0; | |
1361 | fdata->offset += SIGNED_SHORT (op); | |
1362 | offset = fdata->offset; | |
1363 | continue; | |
1364 | } | |
4e463ff5 DJ |
1365 | /* Load up minimal toc pointer. Do not treat an epilogue restore |
1366 | of r31 as a minimal TOC load. */ | |
98f08d3d KB |
1367 | else if (((op >> 22) == 0x20f || /* l r31,... or l r30,... */ |
1368 | (op >> 22) == 0x3af) /* ld r31,... or ld r30,... */ | |
4e463ff5 | 1369 | && !framep |
c5aa993b | 1370 | && !minimal_toc_loaded) |
98f08d3d | 1371 | { |
c5aa993b JM |
1372 | minimal_toc_loaded = 1; |
1373 | continue; | |
1374 | ||
f6077098 KB |
1375 | /* move parameters from argument registers to local variable |
1376 | registers */ | |
1377 | } | |
1378 | else if ((op & 0xfc0007fe) == 0x7c000378 && /* mr(.) Rx,Ry */ | |
1379 | (((op >> 21) & 31) >= 3) && /* R3 >= Ry >= R10 */ | |
1380 | (((op >> 21) & 31) <= 10) && | |
96ff0de4 | 1381 | ((long) ((op >> 16) & 31) >= fdata->saved_gpr)) /* Rx: local var reg */ |
f6077098 KB |
1382 | { |
1383 | continue; | |
1384 | ||
c5aa993b JM |
1385 | /* store parameters in stack */ |
1386 | } | |
e802b915 | 1387 | /* Move parameters from argument registers to temporary register. */ |
773df3e5 | 1388 | else if (store_param_on_stack_p (op, framep, &r0_contains_arg)) |
e802b915 | 1389 | { |
c5aa993b JM |
1390 | continue; |
1391 | ||
1392 | /* Set up frame pointer */ | |
1393 | } | |
1394 | else if (op == 0x603f0000 /* oril r31, r1, 0x0 */ | |
1395 | || op == 0x7c3f0b78) | |
1396 | { /* mr r31, r1 */ | |
1397 | fdata->frameless = 0; | |
1398 | framep = 1; | |
6f99cb26 | 1399 | fdata->alloca_reg = (tdep->ppc_gp0_regnum + 31); |
c5aa993b JM |
1400 | continue; |
1401 | ||
1402 | /* Another way to set up the frame pointer. */ | |
1403 | } | |
1404 | else if ((op & 0xfc1fffff) == 0x38010000) | |
1405 | { /* addi rX, r1, 0x0 */ | |
1406 | fdata->frameless = 0; | |
1407 | framep = 1; | |
6f99cb26 AC |
1408 | fdata->alloca_reg = (tdep->ppc_gp0_regnum |
1409 | + ((op & ~0x38010000) >> 21)); | |
c5aa993b | 1410 | continue; |
c5aa993b | 1411 | } |
6be8bc0c EZ |
1412 | /* AltiVec related instructions. */ |
1413 | /* Store the vrsave register (spr 256) in another register for | |
1414 | later manipulation, or load a register into the vrsave | |
1415 | register. 2 instructions are used: mfvrsave and | |
1416 | mtvrsave. They are shorthand notation for mfspr Rn, SPR256 | |
1417 | and mtspr SPR256, Rn. */ | |
1418 | /* mfspr Rn SPR256 == 011111 nnnnn 0000001000 01010100110 | |
1419 | mtspr SPR256 Rn == 011111 nnnnn 0000001000 01110100110 */ | |
1420 | else if ((op & 0xfc1fffff) == 0x7c0042a6) /* mfvrsave Rn */ | |
1421 | { | |
1422 | vrsave_reg = GET_SRC_REG (op); | |
1423 | continue; | |
1424 | } | |
1425 | else if ((op & 0xfc1fffff) == 0x7c0043a6) /* mtvrsave Rn */ | |
1426 | { | |
1427 | continue; | |
1428 | } | |
1429 | /* Store the register where vrsave was saved to onto the stack: | |
1430 | rS is the register where vrsave was stored in a previous | |
1431 | instruction. */ | |
1432 | /* 100100 sssss 00001 dddddddd dddddddd */ | |
1433 | else if ((op & 0xfc1f0000) == 0x90010000) /* stw rS, d(r1) */ | |
1434 | { | |
1435 | if (vrsave_reg == GET_SRC_REG (op)) | |
1436 | { | |
1437 | fdata->vrsave_offset = SIGNED_SHORT (op) + offset; | |
1438 | vrsave_reg = -1; | |
1439 | } | |
1440 | continue; | |
1441 | } | |
1442 | /* Compute the new value of vrsave, by modifying the register | |
1443 | where vrsave was saved to. */ | |
1444 | else if (((op & 0xfc000000) == 0x64000000) /* oris Ra, Rs, UIMM */ | |
1445 | || ((op & 0xfc000000) == 0x60000000))/* ori Ra, Rs, UIMM */ | |
1446 | { | |
1447 | continue; | |
1448 | } | |
1449 | /* li r0, SIMM (short for addi r0, 0, SIMM). This is the first | |
1450 | in a pair of insns to save the vector registers on the | |
1451 | stack. */ | |
1452 | /* 001110 00000 00000 iiii iiii iiii iiii */ | |
96ff0de4 EZ |
1453 | /* 001110 01110 00000 iiii iiii iiii iiii */ |
1454 | else if ((op & 0xffff0000) == 0x38000000 /* li r0, SIMM */ | |
1455 | || (op & 0xffff0000) == 0x39c00000) /* li r14, SIMM */ | |
6be8bc0c | 1456 | { |
773df3e5 JB |
1457 | if ((op & 0xffff0000) == 0x38000000) |
1458 | r0_contains_arg = 0; | |
6be8bc0c EZ |
1459 | li_found_pc = pc; |
1460 | vr_saved_offset = SIGNED_SHORT (op); | |
773df3e5 JB |
1461 | |
1462 | /* This insn by itself is not part of the prologue, unless | |
1463 | if part of the pair of insns mentioned above. So do not | |
1464 | record this insn as part of the prologue yet. */ | |
1465 | prev_insn_was_prologue_insn = 0; | |
6be8bc0c EZ |
1466 | } |
1467 | /* Store vector register S at (r31+r0) aligned to 16 bytes. */ | |
1468 | /* 011111 sssss 11111 00000 00111001110 */ | |
1469 | else if ((op & 0xfc1fffff) == 0x7c1f01ce) /* stvx Vs, R31, R0 */ | |
1470 | { | |
1471 | if (pc == (li_found_pc + 4)) | |
1472 | { | |
1473 | vr_reg = GET_SRC_REG (op); | |
1474 | /* If this is the first vector reg to be saved, or if | |
1475 | it has a lower number than others previously seen, | |
1476 | reupdate the frame info. */ | |
1477 | if (fdata->saved_vr == -1 || fdata->saved_vr > vr_reg) | |
1478 | { | |
1479 | fdata->saved_vr = vr_reg; | |
1480 | fdata->vr_offset = vr_saved_offset + offset; | |
1481 | } | |
1482 | vr_saved_offset = -1; | |
1483 | vr_reg = -1; | |
1484 | li_found_pc = 0; | |
1485 | } | |
1486 | } | |
1487 | /* End AltiVec related instructions. */ | |
96ff0de4 EZ |
1488 | |
1489 | /* Start BookE related instructions. */ | |
1490 | /* Store gen register S at (r31+uimm). | |
1491 | Any register less than r13 is volatile, so we don't care. */ | |
1492 | /* 000100 sssss 11111 iiiii 01100100001 */ | |
1493 | else if (arch_info->mach == bfd_mach_ppc_e500 | |
1494 | && (op & 0xfc1f07ff) == 0x101f0321) /* evstdd Rs,uimm(R31) */ | |
1495 | { | |
1496 | if ((op & 0x03e00000) >= 0x01a00000) /* Rs >= r13 */ | |
1497 | { | |
1498 | unsigned int imm; | |
1499 | ev_reg = GET_SRC_REG (op); | |
1500 | imm = (op >> 11) & 0x1f; | |
1501 | ev_offset = imm * 8; | |
1502 | /* If this is the first vector reg to be saved, or if | |
1503 | it has a lower number than others previously seen, | |
1504 | reupdate the frame info. */ | |
1505 | if (fdata->saved_ev == -1 || fdata->saved_ev > ev_reg) | |
1506 | { | |
1507 | fdata->saved_ev = ev_reg; | |
1508 | fdata->ev_offset = ev_offset + offset; | |
1509 | } | |
1510 | } | |
1511 | continue; | |
1512 | } | |
1513 | /* Store gen register rS at (r1+rB). */ | |
1514 | /* 000100 sssss 00001 bbbbb 01100100000 */ | |
1515 | else if (arch_info->mach == bfd_mach_ppc_e500 | |
1516 | && (op & 0xffe007ff) == 0x13e00320) /* evstddx RS,R1,Rb */ | |
1517 | { | |
1518 | if (pc == (li_found_pc + 4)) | |
1519 | { | |
1520 | ev_reg = GET_SRC_REG (op); | |
1521 | /* If this is the first vector reg to be saved, or if | |
1522 | it has a lower number than others previously seen, | |
1523 | reupdate the frame info. */ | |
1524 | /* We know the contents of rB from the previous instruction. */ | |
1525 | if (fdata->saved_ev == -1 || fdata->saved_ev > ev_reg) | |
1526 | { | |
1527 | fdata->saved_ev = ev_reg; | |
1528 | fdata->ev_offset = vr_saved_offset + offset; | |
1529 | } | |
1530 | vr_saved_offset = -1; | |
1531 | ev_reg = -1; | |
1532 | li_found_pc = 0; | |
1533 | } | |
1534 | continue; | |
1535 | } | |
1536 | /* Store gen register r31 at (rA+uimm). */ | |
1537 | /* 000100 11111 aaaaa iiiii 01100100001 */ | |
1538 | else if (arch_info->mach == bfd_mach_ppc_e500 | |
1539 | && (op & 0xffe007ff) == 0x13e00321) /* evstdd R31,Ra,UIMM */ | |
1540 | { | |
1541 | /* Wwe know that the source register is 31 already, but | |
1542 | it can't hurt to compute it. */ | |
1543 | ev_reg = GET_SRC_REG (op); | |
1544 | ev_offset = ((op >> 11) & 0x1f) * 8; | |
1545 | /* If this is the first vector reg to be saved, or if | |
1546 | it has a lower number than others previously seen, | |
1547 | reupdate the frame info. */ | |
1548 | if (fdata->saved_ev == -1 || fdata->saved_ev > ev_reg) | |
1549 | { | |
1550 | fdata->saved_ev = ev_reg; | |
1551 | fdata->ev_offset = ev_offset + offset; | |
1552 | } | |
1553 | ||
1554 | continue; | |
1555 | } | |
1556 | /* Store gen register S at (r31+r0). | |
1557 | Store param on stack when offset from SP bigger than 4 bytes. */ | |
1558 | /* 000100 sssss 11111 00000 01100100000 */ | |
1559 | else if (arch_info->mach == bfd_mach_ppc_e500 | |
1560 | && (op & 0xfc1fffff) == 0x101f0320) /* evstddx Rs,R31,R0 */ | |
1561 | { | |
1562 | if (pc == (li_found_pc + 4)) | |
1563 | { | |
1564 | if ((op & 0x03e00000) >= 0x01a00000) | |
1565 | { | |
1566 | ev_reg = GET_SRC_REG (op); | |
1567 | /* If this is the first vector reg to be saved, or if | |
1568 | it has a lower number than others previously seen, | |
1569 | reupdate the frame info. */ | |
1570 | /* We know the contents of r0 from the previous | |
1571 | instruction. */ | |
1572 | if (fdata->saved_ev == -1 || fdata->saved_ev > ev_reg) | |
1573 | { | |
1574 | fdata->saved_ev = ev_reg; | |
1575 | fdata->ev_offset = vr_saved_offset + offset; | |
1576 | } | |
1577 | ev_reg = -1; | |
1578 | } | |
1579 | vr_saved_offset = -1; | |
1580 | li_found_pc = 0; | |
1581 | continue; | |
1582 | } | |
1583 | } | |
1584 | /* End BookE related instructions. */ | |
1585 | ||
c5aa993b JM |
1586 | else |
1587 | { | |
55d05f3b KB |
1588 | /* Not a recognized prologue instruction. |
1589 | Handle optimizer code motions into the prologue by continuing | |
1590 | the search if we have no valid frame yet or if the return | |
1591 | address is not yet saved in the frame. */ | |
4e463ff5 | 1592 | if (fdata->frameless == 0 && fdata->nosavedpc == 0) |
55d05f3b KB |
1593 | break; |
1594 | ||
1595 | if (op == 0x4e800020 /* blr */ | |
1596 | || op == 0x4e800420) /* bctr */ | |
1597 | /* Do not scan past epilogue in frameless functions or | |
1598 | trampolines. */ | |
1599 | break; | |
1600 | if ((op & 0xf4000000) == 0x40000000) /* bxx */ | |
64366f1c | 1601 | /* Never skip branches. */ |
55d05f3b KB |
1602 | break; |
1603 | ||
1604 | if (num_skip_non_prologue_insns++ > max_skip_non_prologue_insns) | |
1605 | /* Do not scan too many insns, scanning insns is expensive with | |
1606 | remote targets. */ | |
1607 | break; | |
1608 | ||
1609 | /* Continue scanning. */ | |
1610 | prev_insn_was_prologue_insn = 0; | |
1611 | continue; | |
c5aa993b | 1612 | } |
c906108c SS |
1613 | } |
1614 | ||
1615 | #if 0 | |
1616 | /* I have problems with skipping over __main() that I need to address | |
1617 | * sometime. Previously, I used to use misc_function_vector which | |
1618 | * didn't work as well as I wanted to be. -MGO */ | |
1619 | ||
1620 | /* If the first thing after skipping a prolog is a branch to a function, | |
1621 | this might be a call to an initializer in main(), introduced by gcc2. | |
64366f1c | 1622 | We'd like to skip over it as well. Fortunately, xlc does some extra |
c906108c | 1623 | work before calling a function right after a prologue, thus we can |
64366f1c | 1624 | single out such gcc2 behaviour. */ |
c906108c | 1625 | |
c906108c | 1626 | |
c5aa993b JM |
1627 | if ((op & 0xfc000001) == 0x48000001) |
1628 | { /* bl foo, an initializer function? */ | |
1629 | op = read_memory_integer (pc + 4, 4); | |
1630 | ||
1631 | if (op == 0x4def7b82) | |
1632 | { /* cror 0xf, 0xf, 0xf (nop) */ | |
c906108c | 1633 | |
64366f1c EZ |
1634 | /* Check and see if we are in main. If so, skip over this |
1635 | initializer function as well. */ | |
c906108c | 1636 | |
c5aa993b | 1637 | tmp = find_pc_misc_function (pc); |
6314a349 AC |
1638 | if (tmp >= 0 |
1639 | && strcmp (misc_function_vector[tmp].name, main_name ()) == 0) | |
c5aa993b JM |
1640 | return pc + 8; |
1641 | } | |
c906108c | 1642 | } |
c906108c | 1643 | #endif /* 0 */ |
c5aa993b JM |
1644 | |
1645 | fdata->offset = -fdata->offset; | |
ddb20c56 | 1646 | return last_prologue_pc; |
c906108c SS |
1647 | } |
1648 | ||
1649 | ||
1650 | /************************************************************************* | |
f6077098 | 1651 | Support for creating pushing a dummy frame into the stack, and popping |
c906108c SS |
1652 | frames, etc. |
1653 | *************************************************************************/ | |
1654 | ||
c906108c | 1655 | |
11269d7e AC |
1656 | /* All the ABI's require 16 byte alignment. */ |
1657 | static CORE_ADDR | |
1658 | rs6000_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr) | |
1659 | { | |
1660 | return (addr & -16); | |
1661 | } | |
1662 | ||
7a78ae4e | 1663 | /* Pass the arguments in either registers, or in the stack. In RS/6000, |
c906108c SS |
1664 | the first eight words of the argument list (that might be less than |
1665 | eight parameters if some parameters occupy more than one word) are | |
7a78ae4e | 1666 | passed in r3..r10 registers. float and double parameters are |
64366f1c EZ |
1667 | passed in fpr's, in addition to that. Rest of the parameters if any |
1668 | are passed in user stack. There might be cases in which half of the | |
c906108c SS |
1669 | parameter is copied into registers, the other half is pushed into |
1670 | stack. | |
1671 | ||
7a78ae4e ND |
1672 | Stack must be aligned on 64-bit boundaries when synthesizing |
1673 | function calls. | |
1674 | ||
c906108c SS |
1675 | If the function is returning a structure, then the return address is passed |
1676 | in r3, then the first 7 words of the parameters can be passed in registers, | |
64366f1c | 1677 | starting from r4. */ |
c906108c | 1678 | |
7a78ae4e | 1679 | static CORE_ADDR |
7d9b040b | 1680 | rs6000_push_dummy_call (struct gdbarch *gdbarch, struct value *function, |
77b2b6d4 AC |
1681 | struct regcache *regcache, CORE_ADDR bp_addr, |
1682 | int nargs, struct value **args, CORE_ADDR sp, | |
1683 | int struct_return, CORE_ADDR struct_addr) | |
c906108c | 1684 | { |
7a41266b | 1685 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
c906108c SS |
1686 | int ii; |
1687 | int len = 0; | |
c5aa993b JM |
1688 | int argno; /* current argument number */ |
1689 | int argbytes; /* current argument byte */ | |
50fd1280 | 1690 | gdb_byte tmp_buffer[50]; |
c5aa993b | 1691 | int f_argno = 0; /* current floating point argno */ |
21283beb | 1692 | int wordsize = gdbarch_tdep (current_gdbarch)->wordsize; |
7d9b040b | 1693 | CORE_ADDR func_addr = find_function_addr (function, NULL); |
c906108c | 1694 | |
ea7c478f | 1695 | struct value *arg = 0; |
c906108c SS |
1696 | struct type *type; |
1697 | ||
fb4443d8 | 1698 | ULONGEST saved_sp; |
c906108c | 1699 | |
383f0f5b JB |
1700 | /* The calling convention this function implements assumes the |
1701 | processor has floating-point registers. We shouldn't be using it | |
1702 | on PPC variants that lack them. */ | |
1703 | gdb_assert (ppc_floating_point_unit_p (current_gdbarch)); | |
1704 | ||
64366f1c | 1705 | /* The first eight words of ther arguments are passed in registers. |
7a41266b AC |
1706 | Copy them appropriately. */ |
1707 | ii = 0; | |
1708 | ||
1709 | /* If the function is returning a `struct', then the first word | |
1710 | (which will be passed in r3) is used for struct return address. | |
1711 | In that case we should advance one word and start from r4 | |
1712 | register to copy parameters. */ | |
1713 | if (struct_return) | |
1714 | { | |
1715 | regcache_raw_write_unsigned (regcache, tdep->ppc_gp0_regnum + 3, | |
1716 | struct_addr); | |
1717 | ii++; | |
1718 | } | |
c906108c SS |
1719 | |
1720 | /* | |
c5aa993b JM |
1721 | effectively indirect call... gcc does... |
1722 | ||
1723 | return_val example( float, int); | |
1724 | ||
1725 | eabi: | |
1726 | float in fp0, int in r3 | |
1727 | offset of stack on overflow 8/16 | |
1728 | for varargs, must go by type. | |
1729 | power open: | |
1730 | float in r3&r4, int in r5 | |
1731 | offset of stack on overflow different | |
1732 | both: | |
1733 | return in r3 or f0. If no float, must study how gcc emulates floats; | |
1734 | pay attention to arg promotion. | |
1735 | User may have to cast\args to handle promotion correctly | |
1736 | since gdb won't know if prototype supplied or not. | |
1737 | */ | |
c906108c | 1738 | |
c5aa993b JM |
1739 | for (argno = 0, argbytes = 0; argno < nargs && ii < 8; ++ii) |
1740 | { | |
3acba339 | 1741 | int reg_size = register_size (current_gdbarch, ii + 3); |
c5aa993b JM |
1742 | |
1743 | arg = args[argno]; | |
df407dfe | 1744 | type = check_typedef (value_type (arg)); |
c5aa993b JM |
1745 | len = TYPE_LENGTH (type); |
1746 | ||
1747 | if (TYPE_CODE (type) == TYPE_CODE_FLT) | |
1748 | { | |
1749 | ||
64366f1c | 1750 | /* Floating point arguments are passed in fpr's, as well as gpr's. |
c5aa993b | 1751 | There are 13 fpr's reserved for passing parameters. At this point |
64366f1c | 1752 | there is no way we would run out of them. */ |
c5aa993b | 1753 | |
9f335945 KB |
1754 | gdb_assert (len <= 8); |
1755 | ||
1756 | regcache_cooked_write (regcache, | |
1757 | tdep->ppc_fp0_regnum + 1 + f_argno, | |
0fd88904 | 1758 | value_contents (arg)); |
c5aa993b JM |
1759 | ++f_argno; |
1760 | } | |
1761 | ||
f6077098 | 1762 | if (len > reg_size) |
c5aa993b JM |
1763 | { |
1764 | ||
64366f1c | 1765 | /* Argument takes more than one register. */ |
c5aa993b JM |
1766 | while (argbytes < len) |
1767 | { | |
50fd1280 | 1768 | gdb_byte word[MAX_REGISTER_SIZE]; |
9f335945 KB |
1769 | memset (word, 0, reg_size); |
1770 | memcpy (word, | |
0fd88904 | 1771 | ((char *) value_contents (arg)) + argbytes, |
f6077098 KB |
1772 | (len - argbytes) > reg_size |
1773 | ? reg_size : len - argbytes); | |
9f335945 KB |
1774 | regcache_cooked_write (regcache, |
1775 | tdep->ppc_gp0_regnum + 3 + ii, | |
1776 | word); | |
f6077098 | 1777 | ++ii, argbytes += reg_size; |
c5aa993b JM |
1778 | |
1779 | if (ii >= 8) | |
1780 | goto ran_out_of_registers_for_arguments; | |
1781 | } | |
1782 | argbytes = 0; | |
1783 | --ii; | |
1784 | } | |
1785 | else | |
64366f1c EZ |
1786 | { |
1787 | /* Argument can fit in one register. No problem. */ | |
4c6b5505 UW |
1788 | int adj = gdbarch_byte_order (current_gdbarch) |
1789 | == BFD_ENDIAN_BIG ? reg_size - len : 0; | |
50fd1280 | 1790 | gdb_byte word[MAX_REGISTER_SIZE]; |
9f335945 KB |
1791 | |
1792 | memset (word, 0, reg_size); | |
0fd88904 | 1793 | memcpy (word, value_contents (arg), len); |
9f335945 | 1794 | regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 3 +ii, word); |
c5aa993b JM |
1795 | } |
1796 | ++argno; | |
c906108c | 1797 | } |
c906108c SS |
1798 | |
1799 | ran_out_of_registers_for_arguments: | |
1800 | ||
3e8c568d UW |
1801 | regcache_cooked_read_unsigned (regcache, |
1802 | gdbarch_sp_regnum (current_gdbarch), | |
1803 | &saved_sp); | |
cc9836a8 | 1804 | |
64366f1c | 1805 | /* Location for 8 parameters are always reserved. */ |
7a78ae4e | 1806 | sp -= wordsize * 8; |
f6077098 | 1807 | |
64366f1c | 1808 | /* Another six words for back chain, TOC register, link register, etc. */ |
7a78ae4e | 1809 | sp -= wordsize * 6; |
f6077098 | 1810 | |
64366f1c | 1811 | /* Stack pointer must be quadword aligned. */ |
7a78ae4e | 1812 | sp &= -16; |
c906108c | 1813 | |
64366f1c EZ |
1814 | /* If there are more arguments, allocate space for them in |
1815 | the stack, then push them starting from the ninth one. */ | |
c906108c | 1816 | |
c5aa993b JM |
1817 | if ((argno < nargs) || argbytes) |
1818 | { | |
1819 | int space = 0, jj; | |
c906108c | 1820 | |
c5aa993b JM |
1821 | if (argbytes) |
1822 | { | |
1823 | space += ((len - argbytes + 3) & -4); | |
1824 | jj = argno + 1; | |
1825 | } | |
1826 | else | |
1827 | jj = argno; | |
c906108c | 1828 | |
c5aa993b JM |
1829 | for (; jj < nargs; ++jj) |
1830 | { | |
ea7c478f | 1831 | struct value *val = args[jj]; |
df407dfe | 1832 | space += ((TYPE_LENGTH (value_type (val))) + 3) & -4; |
c5aa993b | 1833 | } |
c906108c | 1834 | |
64366f1c | 1835 | /* Add location required for the rest of the parameters. */ |
f6077098 | 1836 | space = (space + 15) & -16; |
c5aa993b | 1837 | sp -= space; |
c906108c | 1838 | |
7aea86e6 AC |
1839 | /* This is another instance we need to be concerned about |
1840 | securing our stack space. If we write anything underneath %sp | |
1841 | (r1), we might conflict with the kernel who thinks he is free | |
1842 | to use this area. So, update %sp first before doing anything | |
1843 | else. */ | |
1844 | ||
3e8c568d UW |
1845 | regcache_raw_write_signed (regcache, |
1846 | gdbarch_sp_regnum (current_gdbarch), sp); | |
7aea86e6 | 1847 | |
64366f1c EZ |
1848 | /* If the last argument copied into the registers didn't fit there |
1849 | completely, push the rest of it into stack. */ | |
c906108c | 1850 | |
c5aa993b JM |
1851 | if (argbytes) |
1852 | { | |
1853 | write_memory (sp + 24 + (ii * 4), | |
50fd1280 | 1854 | value_contents (arg) + argbytes, |
c5aa993b JM |
1855 | len - argbytes); |
1856 | ++argno; | |
1857 | ii += ((len - argbytes + 3) & -4) / 4; | |
1858 | } | |
c906108c | 1859 | |
64366f1c | 1860 | /* Push the rest of the arguments into stack. */ |
c5aa993b JM |
1861 | for (; argno < nargs; ++argno) |
1862 | { | |
c906108c | 1863 | |
c5aa993b | 1864 | arg = args[argno]; |
df407dfe | 1865 | type = check_typedef (value_type (arg)); |
c5aa993b | 1866 | len = TYPE_LENGTH (type); |
c906108c SS |
1867 | |
1868 | ||
64366f1c EZ |
1869 | /* Float types should be passed in fpr's, as well as in the |
1870 | stack. */ | |
c5aa993b JM |
1871 | if (TYPE_CODE (type) == TYPE_CODE_FLT && f_argno < 13) |
1872 | { | |
c906108c | 1873 | |
9f335945 | 1874 | gdb_assert (len <= 8); |
c906108c | 1875 | |
9f335945 KB |
1876 | regcache_cooked_write (regcache, |
1877 | tdep->ppc_fp0_regnum + 1 + f_argno, | |
0fd88904 | 1878 | value_contents (arg)); |
c5aa993b JM |
1879 | ++f_argno; |
1880 | } | |
c906108c | 1881 | |
50fd1280 | 1882 | write_memory (sp + 24 + (ii * 4), value_contents (arg), len); |
c5aa993b JM |
1883 | ii += ((len + 3) & -4) / 4; |
1884 | } | |
c906108c | 1885 | } |
c906108c | 1886 | |
69517000 | 1887 | /* Set the stack pointer. According to the ABI, the SP is meant to |
7aea86e6 AC |
1888 | be set _before_ the corresponding stack space is used. On AIX, |
1889 | this even applies when the target has been completely stopped! | |
1890 | Not doing this can lead to conflicts with the kernel which thinks | |
1891 | that it still has control over this not-yet-allocated stack | |
1892 | region. */ | |
3e8c568d | 1893 | regcache_raw_write_signed (regcache, gdbarch_sp_regnum (current_gdbarch), sp); |
33a7c2fc | 1894 | |
7aea86e6 | 1895 | /* Set back chain properly. */ |
8ba0209f AM |
1896 | store_unsigned_integer (tmp_buffer, wordsize, saved_sp); |
1897 | write_memory (sp, tmp_buffer, wordsize); | |
7aea86e6 | 1898 | |
e56a0ecc AC |
1899 | /* Point the inferior function call's return address at the dummy's |
1900 | breakpoint. */ | |
1901 | regcache_raw_write_signed (regcache, tdep->ppc_lr_regnum, bp_addr); | |
1902 | ||
794a477a AC |
1903 | /* Set the TOC register, get the value from the objfile reader |
1904 | which, in turn, gets it from the VMAP table. */ | |
1905 | if (rs6000_find_toc_address_hook != NULL) | |
1906 | { | |
1907 | CORE_ADDR tocvalue = (*rs6000_find_toc_address_hook) (func_addr); | |
1908 | regcache_raw_write_signed (regcache, tdep->ppc_toc_regnum, tocvalue); | |
1909 | } | |
1910 | ||
56be3814 | 1911 | target_store_registers (regcache, -1); |
c906108c SS |
1912 | return sp; |
1913 | } | |
c906108c | 1914 | |
d217aaed MK |
1915 | static enum return_value_convention |
1916 | rs6000_return_value (struct gdbarch *gdbarch, struct type *valtype, | |
1917 | struct regcache *regcache, gdb_byte *readbuf, | |
1918 | const gdb_byte *writebuf) | |
c906108c | 1919 | { |
ace1378a | 1920 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
d217aaed | 1921 | gdb_byte buf[8]; |
c906108c | 1922 | |
383f0f5b JB |
1923 | /* The calling convention this function implements assumes the |
1924 | processor has floating-point registers. We shouldn't be using it | |
d217aaed | 1925 | on PowerPC variants that lack them. */ |
383f0f5b JB |
1926 | gdb_assert (ppc_floating_point_unit_p (current_gdbarch)); |
1927 | ||
d217aaed MK |
1928 | /* AltiVec extension: Functions that declare a vector data type as a |
1929 | return value place that return value in VR2. */ | |
1930 | if (TYPE_CODE (valtype) == TYPE_CODE_ARRAY && TYPE_VECTOR (valtype) | |
1931 | && TYPE_LENGTH (valtype) == 16) | |
c5aa993b | 1932 | { |
d217aaed MK |
1933 | if (readbuf) |
1934 | regcache_cooked_read (regcache, tdep->ppc_vr0_regnum + 2, readbuf); | |
1935 | if (writebuf) | |
1936 | regcache_cooked_write (regcache, tdep->ppc_vr0_regnum + 2, writebuf); | |
c906108c | 1937 | |
d217aaed | 1938 | return RETURN_VALUE_REGISTER_CONVENTION; |
c5aa993b | 1939 | } |
d217aaed MK |
1940 | |
1941 | /* If the called subprogram returns an aggregate, there exists an | |
1942 | implicit first argument, whose value is the address of a caller- | |
1943 | allocated buffer into which the callee is assumed to store its | |
1944 | return value. All explicit parameters are appropriately | |
1945 | relabeled. */ | |
1946 | if (TYPE_CODE (valtype) == TYPE_CODE_STRUCT | |
1947 | || TYPE_CODE (valtype) == TYPE_CODE_UNION | |
1948 | || TYPE_CODE (valtype) == TYPE_CODE_ARRAY) | |
1949 | return RETURN_VALUE_STRUCT_CONVENTION; | |
1950 | ||
1951 | /* Scalar floating-point values are returned in FPR1 for float or | |
1952 | double, and in FPR1:FPR2 for quadword precision. Fortran | |
1953 | complex*8 and complex*16 are returned in FPR1:FPR2, and | |
1954 | complex*32 is returned in FPR1:FPR4. */ | |
1955 | if (TYPE_CODE (valtype) == TYPE_CODE_FLT | |
1956 | && (TYPE_LENGTH (valtype) == 4 || TYPE_LENGTH (valtype) == 8)) | |
1957 | { | |
1958 | struct type *regtype = register_type (gdbarch, tdep->ppc_fp0_regnum); | |
1959 | gdb_byte regval[8]; | |
1960 | ||
1961 | /* FIXME: kettenis/2007-01-01: Add support for quadword | |
1962 | precision and complex. */ | |
1963 | ||
1964 | if (readbuf) | |
1965 | { | |
1966 | regcache_cooked_read (regcache, tdep->ppc_fp0_regnum + 1, regval); | |
1967 | convert_typed_floating (regval, regtype, readbuf, valtype); | |
1968 | } | |
1969 | if (writebuf) | |
1970 | { | |
1971 | convert_typed_floating (writebuf, valtype, regval, regtype); | |
1972 | regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + 1, regval); | |
1973 | } | |
1974 | ||
1975 | return RETURN_VALUE_REGISTER_CONVENTION; | |
1976 | } | |
1977 | ||
1978 | /* Values of the types int, long, short, pointer, and char (length | |
1979 | is less than or equal to four bytes), as well as bit values of | |
1980 | lengths less than or equal to 32 bits, must be returned right | |
1981 | justified in GPR3 with signed values sign extended and unsigned | |
1982 | values zero extended, as necessary. */ | |
1983 | if (TYPE_LENGTH (valtype) <= tdep->wordsize) | |
ace1378a | 1984 | { |
d217aaed MK |
1985 | if (readbuf) |
1986 | { | |
1987 | ULONGEST regval; | |
1988 | ||
1989 | /* For reading we don't have to worry about sign extension. */ | |
1990 | regcache_cooked_read_unsigned (regcache, tdep->ppc_gp0_regnum + 3, | |
1991 | ®val); | |
1992 | store_unsigned_integer (readbuf, TYPE_LENGTH (valtype), regval); | |
1993 | } | |
1994 | if (writebuf) | |
1995 | { | |
1996 | /* For writing, use unpack_long since that should handle any | |
1997 | required sign extension. */ | |
1998 | regcache_cooked_write_unsigned (regcache, tdep->ppc_gp0_regnum + 3, | |
1999 | unpack_long (valtype, writebuf)); | |
2000 | } | |
2001 | ||
2002 | return RETURN_VALUE_REGISTER_CONVENTION; | |
ace1378a | 2003 | } |
d217aaed MK |
2004 | |
2005 | /* Eight-byte non-floating-point scalar values must be returned in | |
2006 | GPR3:GPR4. */ | |
2007 | ||
2008 | if (TYPE_LENGTH (valtype) == 8) | |
c5aa993b | 2009 | { |
d217aaed MK |
2010 | gdb_assert (TYPE_CODE (valtype) != TYPE_CODE_FLT); |
2011 | gdb_assert (tdep->wordsize == 4); | |
2012 | ||
2013 | if (readbuf) | |
2014 | { | |
2015 | gdb_byte regval[8]; | |
2016 | ||
2017 | regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 3, regval); | |
2018 | regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 4, | |
2019 | regval + 4); | |
2020 | memcpy (readbuf, regval, 8); | |
2021 | } | |
2022 | if (writebuf) | |
2023 | { | |
2024 | regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 3, writebuf); | |
2025 | regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 4, | |
2026 | writebuf + 4); | |
2027 | } | |
2028 | ||
2029 | return RETURN_VALUE_REGISTER_CONVENTION; | |
c906108c | 2030 | } |
d217aaed MK |
2031 | |
2032 | return RETURN_VALUE_STRUCT_CONVENTION; | |
c906108c SS |
2033 | } |
2034 | ||
977adac5 ND |
2035 | /* Return whether handle_inferior_event() should proceed through code |
2036 | starting at PC in function NAME when stepping. | |
2037 | ||
2038 | The AIX -bbigtoc linker option generates functions @FIX0, @FIX1, etc. to | |
2039 | handle memory references that are too distant to fit in instructions | |
2040 | generated by the compiler. For example, if 'foo' in the following | |
2041 | instruction: | |
2042 | ||
2043 | lwz r9,foo(r2) | |
2044 | ||
2045 | is greater than 32767, the linker might replace the lwz with a branch to | |
2046 | somewhere in @FIX1 that does the load in 2 instructions and then branches | |
2047 | back to where execution should continue. | |
2048 | ||
2049 | GDB should silently step over @FIX code, just like AIX dbx does. | |
2ec664f5 MS |
2050 | Unfortunately, the linker uses the "b" instruction for the |
2051 | branches, meaning that the link register doesn't get set. | |
2052 | Therefore, GDB's usual step_over_function () mechanism won't work. | |
977adac5 | 2053 | |
e76f05fa UW |
2054 | Instead, use the gdbarch_skip_trampoline_code and |
2055 | gdbarch_skip_trampoline_code hooks in handle_inferior_event() to skip past | |
2ec664f5 | 2056 | @FIX code. */ |
977adac5 ND |
2057 | |
2058 | int | |
2059 | rs6000_in_solib_return_trampoline (CORE_ADDR pc, char *name) | |
2060 | { | |
2061 | return name && !strncmp (name, "@FIX", 4); | |
2062 | } | |
2063 | ||
2064 | /* Skip code that the user doesn't want to see when stepping: | |
2065 | ||
2066 | 1. Indirect function calls use a piece of trampoline code to do context | |
2067 | switching, i.e. to set the new TOC table. Skip such code if we are on | |
2068 | its first instruction (as when we have single-stepped to here). | |
2069 | ||
2070 | 2. Skip shared library trampoline code (which is different from | |
c906108c | 2071 | indirect function call trampolines). |
977adac5 ND |
2072 | |
2073 | 3. Skip bigtoc fixup code. | |
2074 | ||
c906108c | 2075 | Result is desired PC to step until, or NULL if we are not in |
977adac5 | 2076 | code that should be skipped. */ |
c906108c SS |
2077 | |
2078 | CORE_ADDR | |
52f729a7 | 2079 | rs6000_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc) |
c906108c | 2080 | { |
52f0bd74 | 2081 | unsigned int ii, op; |
977adac5 | 2082 | int rel; |
c906108c | 2083 | CORE_ADDR solib_target_pc; |
977adac5 | 2084 | struct minimal_symbol *msymbol; |
c906108c | 2085 | |
c5aa993b JM |
2086 | static unsigned trampoline_code[] = |
2087 | { | |
2088 | 0x800b0000, /* l r0,0x0(r11) */ | |
2089 | 0x90410014, /* st r2,0x14(r1) */ | |
2090 | 0x7c0903a6, /* mtctr r0 */ | |
2091 | 0x804b0004, /* l r2,0x4(r11) */ | |
2092 | 0x816b0008, /* l r11,0x8(r11) */ | |
2093 | 0x4e800420, /* bctr */ | |
2094 | 0x4e800020, /* br */ | |
2095 | 0 | |
c906108c SS |
2096 | }; |
2097 | ||
977adac5 ND |
2098 | /* Check for bigtoc fixup code. */ |
2099 | msymbol = lookup_minimal_symbol_by_pc (pc); | |
2ec664f5 MS |
2100 | if (msymbol |
2101 | && rs6000_in_solib_return_trampoline (pc, | |
2102 | DEPRECATED_SYMBOL_NAME (msymbol))) | |
977adac5 ND |
2103 | { |
2104 | /* Double-check that the third instruction from PC is relative "b". */ | |
2105 | op = read_memory_integer (pc + 8, 4); | |
2106 | if ((op & 0xfc000003) == 0x48000000) | |
2107 | { | |
2108 | /* Extract bits 6-29 as a signed 24-bit relative word address and | |
2109 | add it to the containing PC. */ | |
2110 | rel = ((int)(op << 6) >> 6); | |
2111 | return pc + 8 + rel; | |
2112 | } | |
2113 | } | |
2114 | ||
c906108c | 2115 | /* If pc is in a shared library trampoline, return its target. */ |
52f729a7 | 2116 | solib_target_pc = find_solib_trampoline_target (frame, pc); |
c906108c SS |
2117 | if (solib_target_pc) |
2118 | return solib_target_pc; | |
2119 | ||
c5aa993b JM |
2120 | for (ii = 0; trampoline_code[ii]; ++ii) |
2121 | { | |
2122 | op = read_memory_integer (pc + (ii * 4), 4); | |
2123 | if (op != trampoline_code[ii]) | |
2124 | return 0; | |
2125 | } | |
52f729a7 | 2126 | ii = get_frame_register_unsigned (frame, 11); /* r11 holds destination addr */ |
21283beb | 2127 | pc = read_memory_addr (ii, gdbarch_tdep (current_gdbarch)->wordsize); /* (r11) value */ |
c906108c SS |
2128 | return pc; |
2129 | } | |
2130 | ||
794ac428 UW |
2131 | /* ISA-specific vector types. */ |
2132 | ||
2133 | static struct type * | |
2134 | rs6000_builtin_type_vec64 (struct gdbarch *gdbarch) | |
2135 | { | |
2136 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
2137 | ||
2138 | if (!tdep->ppc_builtin_type_vec64) | |
2139 | { | |
2140 | /* The type we're building is this: */ | |
2141 | #if 0 | |
2142 | union __gdb_builtin_type_vec64 | |
2143 | { | |
2144 | int64_t uint64; | |
2145 | float v2_float[2]; | |
2146 | int32_t v2_int32[2]; | |
2147 | int16_t v4_int16[4]; | |
2148 | int8_t v8_int8[8]; | |
2149 | }; | |
2150 | #endif | |
2151 | ||
2152 | struct type *t; | |
2153 | ||
2154 | t = init_composite_type ("__ppc_builtin_type_vec64", TYPE_CODE_UNION); | |
2155 | append_composite_type_field (t, "uint64", builtin_type_int64); | |
2156 | append_composite_type_field (t, "v2_float", | |
2157 | init_vector_type (builtin_type_float, 2)); | |
2158 | append_composite_type_field (t, "v2_int32", | |
2159 | init_vector_type (builtin_type_int32, 2)); | |
2160 | append_composite_type_field (t, "v4_int16", | |
2161 | init_vector_type (builtin_type_int16, 4)); | |
2162 | append_composite_type_field (t, "v8_int8", | |
2163 | init_vector_type (builtin_type_int8, 8)); | |
2164 | ||
2165 | TYPE_FLAGS (t) |= TYPE_FLAG_VECTOR; | |
2166 | TYPE_NAME (t) = "ppc_builtin_type_vec64"; | |
2167 | tdep->ppc_builtin_type_vec64 = t; | |
2168 | } | |
2169 | ||
2170 | return tdep->ppc_builtin_type_vec64; | |
2171 | } | |
2172 | ||
2173 | static struct type * | |
2174 | rs6000_builtin_type_vec128 (struct gdbarch *gdbarch) | |
2175 | { | |
2176 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
2177 | ||
2178 | if (!tdep->ppc_builtin_type_vec128) | |
2179 | { | |
2180 | /* The type we're building is this: */ | |
2181 | #if 0 | |
2182 | union __gdb_builtin_type_vec128 | |
2183 | { | |
2184 | int128_t uint128; | |
2185 | float v4_float[4]; | |
2186 | int32_t v4_int32[4]; | |
2187 | int16_t v8_int16[8]; | |
2188 | int8_t v16_int8[16]; | |
2189 | }; | |
2190 | #endif | |
2191 | ||
2192 | struct type *t; | |
2193 | ||
2194 | t = init_composite_type ("__ppc_builtin_type_vec128", TYPE_CODE_UNION); | |
2195 | append_composite_type_field (t, "uint128", builtin_type_int128); | |
2196 | append_composite_type_field (t, "v4_float", | |
2197 | init_vector_type (builtin_type_float, 4)); | |
2198 | append_composite_type_field (t, "v4_int32", | |
2199 | init_vector_type (builtin_type_int32, 4)); | |
2200 | append_composite_type_field (t, "v8_int16", | |
2201 | init_vector_type (builtin_type_int16, 8)); | |
2202 | append_composite_type_field (t, "v16_int8", | |
2203 | init_vector_type (builtin_type_int8, 16)); | |
2204 | ||
2205 | TYPE_FLAGS (t) |= TYPE_FLAG_VECTOR; | |
2206 | TYPE_NAME (t) = "ppc_builtin_type_vec128"; | |
2207 | tdep->ppc_builtin_type_vec128 = t; | |
2208 | } | |
2209 | ||
2210 | return tdep->ppc_builtin_type_vec128; | |
2211 | } | |
2212 | ||
7a78ae4e | 2213 | /* Return the size of register REG when words are WORDSIZE bytes long. If REG |
64366f1c | 2214 | isn't available with that word size, return 0. */ |
7a78ae4e ND |
2215 | |
2216 | static int | |
2217 | regsize (const struct reg *reg, int wordsize) | |
2218 | { | |
2219 | return wordsize == 8 ? reg->sz64 : reg->sz32; | |
2220 | } | |
2221 | ||
2222 | /* Return the name of register number N, or null if no such register exists | |
64366f1c | 2223 | in the current architecture. */ |
7a78ae4e | 2224 | |
fa88f677 | 2225 | static const char * |
7a78ae4e ND |
2226 | rs6000_register_name (int n) |
2227 | { | |
21283beb | 2228 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
7a78ae4e ND |
2229 | const struct reg *reg = tdep->regs + n; |
2230 | ||
2231 | if (!regsize (reg, tdep->wordsize)) | |
2232 | return NULL; | |
2233 | return reg->name; | |
2234 | } | |
2235 | ||
7a78ae4e ND |
2236 | /* Return the GDB type object for the "standard" data type |
2237 | of data in register N. */ | |
2238 | ||
2239 | static struct type * | |
691d145a | 2240 | rs6000_register_type (struct gdbarch *gdbarch, int n) |
7a78ae4e | 2241 | { |
691d145a | 2242 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
7a78ae4e ND |
2243 | const struct reg *reg = tdep->regs + n; |
2244 | ||
1fcc0bb8 EZ |
2245 | if (reg->fpr) |
2246 | return builtin_type_double; | |
2247 | else | |
2248 | { | |
2249 | int size = regsize (reg, tdep->wordsize); | |
2250 | switch (size) | |
2251 | { | |
449a5da4 AC |
2252 | case 0: |
2253 | return builtin_type_int0; | |
2254 | case 4: | |
ed6edd9b | 2255 | return builtin_type_uint32; |
1fcc0bb8 | 2256 | case 8: |
c8001721 | 2257 | if (tdep->ppc_ev0_regnum <= n && n <= tdep->ppc_ev31_regnum) |
794ac428 | 2258 | return rs6000_builtin_type_vec64 (gdbarch); |
c8001721 | 2259 | else |
ed6edd9b | 2260 | return builtin_type_uint64; |
1fcc0bb8 EZ |
2261 | break; |
2262 | case 16: | |
794ac428 | 2263 | return rs6000_builtin_type_vec128 (gdbarch); |
1fcc0bb8 EZ |
2264 | break; |
2265 | default: | |
e2e0b3e5 | 2266 | internal_error (__FILE__, __LINE__, _("Register %d size %d unknown"), |
449a5da4 | 2267 | n, size); |
1fcc0bb8 EZ |
2268 | } |
2269 | } | |
7a78ae4e ND |
2270 | } |
2271 | ||
c44ca51c AC |
2272 | /* Is REGNUM a member of REGGROUP? */ |
2273 | static int | |
2274 | rs6000_register_reggroup_p (struct gdbarch *gdbarch, int regnum, | |
2275 | struct reggroup *group) | |
2276 | { | |
2277 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
2278 | int float_p; | |
2279 | int vector_p; | |
2280 | int general_p; | |
2281 | ||
c9f4d572 UW |
2282 | if (gdbarch_register_name (current_gdbarch, regnum) == NULL |
2283 | || *gdbarch_register_name (current_gdbarch, regnum) == '\0') | |
c44ca51c AC |
2284 | return 0; |
2285 | if (group == all_reggroup) | |
2286 | return 1; | |
2287 | ||
2288 | float_p = (regnum == tdep->ppc_fpscr_regnum | |
2289 | || (regnum >= tdep->ppc_fp0_regnum | |
2290 | && regnum < tdep->ppc_fp0_regnum + 32)); | |
2291 | if (group == float_reggroup) | |
2292 | return float_p; | |
2293 | ||
826d5376 PG |
2294 | vector_p = ((tdep->ppc_vr0_regnum >= 0 |
2295 | && regnum >= tdep->ppc_vr0_regnum | |
c44ca51c | 2296 | && regnum < tdep->ppc_vr0_regnum + 32) |
826d5376 PG |
2297 | || (tdep->ppc_ev0_regnum >= 0 |
2298 | && regnum >= tdep->ppc_ev0_regnum | |
c44ca51c | 2299 | && regnum < tdep->ppc_ev0_regnum + 32) |
3bf49e1b | 2300 | || regnum == tdep->ppc_vrsave_regnum - 1 /* vscr */ |
c44ca51c AC |
2301 | || regnum == tdep->ppc_vrsave_regnum |
2302 | || regnum == tdep->ppc_acc_regnum | |
2303 | || regnum == tdep->ppc_spefscr_regnum); | |
2304 | if (group == vector_reggroup) | |
2305 | return vector_p; | |
2306 | ||
2307 | /* Note that PS aka MSR isn't included - it's a system register (and | |
2308 | besides, due to GCC's CFI foobar you do not want to restore | |
2309 | it). */ | |
2310 | general_p = ((regnum >= tdep->ppc_gp0_regnum | |
2311 | && regnum < tdep->ppc_gp0_regnum + 32) | |
2312 | || regnum == tdep->ppc_toc_regnum | |
2313 | || regnum == tdep->ppc_cr_regnum | |
2314 | || regnum == tdep->ppc_lr_regnum | |
2315 | || regnum == tdep->ppc_ctr_regnum | |
2316 | || regnum == tdep->ppc_xer_regnum | |
3e8c568d | 2317 | || regnum == gdbarch_pc_regnum (current_gdbarch)); |
c44ca51c AC |
2318 | if (group == general_reggroup) |
2319 | return general_p; | |
2320 | ||
2321 | if (group == save_reggroup || group == restore_reggroup) | |
2322 | return general_p || vector_p || float_p; | |
2323 | ||
2324 | return 0; | |
2325 | } | |
2326 | ||
691d145a | 2327 | /* The register format for RS/6000 floating point registers is always |
64366f1c | 2328 | double, we need a conversion if the memory format is float. */ |
7a78ae4e ND |
2329 | |
2330 | static int | |
691d145a | 2331 | rs6000_convert_register_p (int regnum, struct type *type) |
7a78ae4e | 2332 | { |
691d145a JB |
2333 | const struct reg *reg = gdbarch_tdep (current_gdbarch)->regs + regnum; |
2334 | ||
2335 | return (reg->fpr | |
2336 | && TYPE_CODE (type) == TYPE_CODE_FLT | |
2337 | && TYPE_LENGTH (type) != TYPE_LENGTH (builtin_type_double)); | |
7a78ae4e ND |
2338 | } |
2339 | ||
7a78ae4e | 2340 | static void |
691d145a JB |
2341 | rs6000_register_to_value (struct frame_info *frame, |
2342 | int regnum, | |
2343 | struct type *type, | |
50fd1280 | 2344 | gdb_byte *to) |
7a78ae4e | 2345 | { |
691d145a | 2346 | const struct reg *reg = gdbarch_tdep (current_gdbarch)->regs + regnum; |
50fd1280 | 2347 | gdb_byte from[MAX_REGISTER_SIZE]; |
691d145a JB |
2348 | |
2349 | gdb_assert (reg->fpr); | |
2350 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_FLT); | |
7a78ae4e | 2351 | |
691d145a JB |
2352 | get_frame_register (frame, regnum, from); |
2353 | convert_typed_floating (from, builtin_type_double, to, type); | |
2354 | } | |
7a292a7a | 2355 | |
7a78ae4e | 2356 | static void |
691d145a JB |
2357 | rs6000_value_to_register (struct frame_info *frame, |
2358 | int regnum, | |
2359 | struct type *type, | |
50fd1280 | 2360 | const gdb_byte *from) |
7a78ae4e | 2361 | { |
691d145a | 2362 | const struct reg *reg = gdbarch_tdep (current_gdbarch)->regs + regnum; |
50fd1280 | 2363 | gdb_byte to[MAX_REGISTER_SIZE]; |
691d145a JB |
2364 | |
2365 | gdb_assert (reg->fpr); | |
2366 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_FLT); | |
2367 | ||
2368 | convert_typed_floating (from, type, to, builtin_type_double); | |
2369 | put_frame_register (frame, regnum, to); | |
7a78ae4e | 2370 | } |
c906108c | 2371 | |
6ced10dd JB |
2372 | /* Move SPE vector register values between a 64-bit buffer and the two |
2373 | 32-bit raw register halves in a regcache. This function handles | |
2374 | both splitting a 64-bit value into two 32-bit halves, and joining | |
2375 | two halves into a whole 64-bit value, depending on the function | |
2376 | passed as the MOVE argument. | |
2377 | ||
2378 | EV_REG must be the number of an SPE evN vector register --- a | |
2379 | pseudoregister. REGCACHE must be a regcache, and BUFFER must be a | |
2380 | 64-bit buffer. | |
2381 | ||
2382 | Call MOVE once for each 32-bit half of that register, passing | |
2383 | REGCACHE, the number of the raw register corresponding to that | |
2384 | half, and the address of the appropriate half of BUFFER. | |
2385 | ||
2386 | For example, passing 'regcache_raw_read' as the MOVE function will | |
2387 | fill BUFFER with the full 64-bit contents of EV_REG. Or, passing | |
2388 | 'regcache_raw_supply' will supply the contents of BUFFER to the | |
2389 | appropriate pair of raw registers in REGCACHE. | |
2390 | ||
2391 | You may need to cast away some 'const' qualifiers when passing | |
2392 | MOVE, since this function can't tell at compile-time which of | |
2393 | REGCACHE or BUFFER is acting as the source of the data. If C had | |
2394 | co-variant type qualifiers, ... */ | |
2395 | static void | |
2396 | e500_move_ev_register (void (*move) (struct regcache *regcache, | |
50fd1280 | 2397 | int regnum, gdb_byte *buf), |
6ced10dd | 2398 | struct regcache *regcache, int ev_reg, |
50fd1280 | 2399 | gdb_byte *buffer) |
6ced10dd JB |
2400 | { |
2401 | struct gdbarch *arch = get_regcache_arch (regcache); | |
2402 | struct gdbarch_tdep *tdep = gdbarch_tdep (arch); | |
2403 | int reg_index; | |
50fd1280 | 2404 | gdb_byte *byte_buffer = buffer; |
6ced10dd JB |
2405 | |
2406 | gdb_assert (tdep->ppc_ev0_regnum <= ev_reg | |
2407 | && ev_reg < tdep->ppc_ev0_regnum + ppc_num_gprs); | |
2408 | ||
2409 | reg_index = ev_reg - tdep->ppc_ev0_regnum; | |
2410 | ||
4c6b5505 | 2411 | if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG) |
6ced10dd JB |
2412 | { |
2413 | move (regcache, tdep->ppc_ev0_upper_regnum + reg_index, byte_buffer); | |
2414 | move (regcache, tdep->ppc_gp0_regnum + reg_index, byte_buffer + 4); | |
2415 | } | |
2416 | else | |
2417 | { | |
2418 | move (regcache, tdep->ppc_gp0_regnum + reg_index, byte_buffer); | |
2419 | move (regcache, tdep->ppc_ev0_upper_regnum + reg_index, byte_buffer + 4); | |
2420 | } | |
2421 | } | |
2422 | ||
c8001721 EZ |
2423 | static void |
2424 | e500_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache, | |
50fd1280 | 2425 | int reg_nr, gdb_byte *buffer) |
c8001721 | 2426 | { |
6ced10dd | 2427 | struct gdbarch *regcache_arch = get_regcache_arch (regcache); |
c8001721 EZ |
2428 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
2429 | ||
6ced10dd JB |
2430 | gdb_assert (regcache_arch == gdbarch); |
2431 | ||
2432 | if (tdep->ppc_ev0_regnum <= reg_nr | |
2433 | && reg_nr < tdep->ppc_ev0_regnum + ppc_num_gprs) | |
2434 | e500_move_ev_register (regcache_raw_read, regcache, reg_nr, buffer); | |
2435 | else | |
a44bddec | 2436 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 AC |
2437 | _("e500_pseudo_register_read: " |
2438 | "called on unexpected register '%s' (%d)"), | |
a44bddec | 2439 | gdbarch_register_name (gdbarch, reg_nr), reg_nr); |
c8001721 EZ |
2440 | } |
2441 | ||
2442 | static void | |
2443 | e500_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache, | |
50fd1280 | 2444 | int reg_nr, const gdb_byte *buffer) |
c8001721 | 2445 | { |
6ced10dd | 2446 | struct gdbarch *regcache_arch = get_regcache_arch (regcache); |
c8001721 EZ |
2447 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
2448 | ||
6ced10dd JB |
2449 | gdb_assert (regcache_arch == gdbarch); |
2450 | ||
2451 | if (tdep->ppc_ev0_regnum <= reg_nr | |
2452 | && reg_nr < tdep->ppc_ev0_regnum + ppc_num_gprs) | |
50fd1280 | 2453 | e500_move_ev_register ((void (*) (struct regcache *, int, gdb_byte *)) |
6ced10dd | 2454 | regcache_raw_write, |
50fd1280 | 2455 | regcache, reg_nr, (gdb_byte *) buffer); |
6ced10dd | 2456 | else |
a44bddec | 2457 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 AC |
2458 | _("e500_pseudo_register_read: " |
2459 | "called on unexpected register '%s' (%d)"), | |
a44bddec | 2460 | gdbarch_register_name (gdbarch, reg_nr), reg_nr); |
6ced10dd JB |
2461 | } |
2462 | ||
2463 | /* The E500 needs a custom reggroup function: it has anonymous raw | |
2464 | registers, and default_register_reggroup_p assumes that anonymous | |
2465 | registers are not members of any reggroup. */ | |
2466 | static int | |
2467 | e500_register_reggroup_p (struct gdbarch *gdbarch, | |
2468 | int regnum, | |
2469 | struct reggroup *group) | |
2470 | { | |
2471 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
2472 | ||
2473 | /* The save and restore register groups need to include the | |
2474 | upper-half registers, even though they're anonymous. */ | |
2475 | if ((group == save_reggroup | |
2476 | || group == restore_reggroup) | |
2477 | && (tdep->ppc_ev0_upper_regnum <= regnum | |
2478 | && regnum < tdep->ppc_ev0_upper_regnum + ppc_num_gprs)) | |
2479 | return 1; | |
2480 | ||
2481 | /* In all other regards, the default reggroup definition is fine. */ | |
2482 | return default_register_reggroup_p (gdbarch, regnum, group); | |
c8001721 EZ |
2483 | } |
2484 | ||
18ed0c4e | 2485 | /* Convert a DBX STABS register number to a GDB register number. */ |
c8001721 | 2486 | static int |
18ed0c4e | 2487 | rs6000_stab_reg_to_regnum (int num) |
c8001721 | 2488 | { |
9f744501 | 2489 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
c8001721 | 2490 | |
9f744501 JB |
2491 | if (0 <= num && num <= 31) |
2492 | return tdep->ppc_gp0_regnum + num; | |
2493 | else if (32 <= num && num <= 63) | |
383f0f5b JB |
2494 | /* FIXME: jimb/2004-05-05: What should we do when the debug info |
2495 | specifies registers the architecture doesn't have? Our | |
2496 | callers don't check the value we return. */ | |
366f009f | 2497 | return tdep->ppc_fp0_regnum + (num - 32); |
18ed0c4e JB |
2498 | else if (77 <= num && num <= 108) |
2499 | return tdep->ppc_vr0_regnum + (num - 77); | |
9f744501 JB |
2500 | else if (1200 <= num && num < 1200 + 32) |
2501 | return tdep->ppc_ev0_regnum + (num - 1200); | |
2502 | else | |
2503 | switch (num) | |
2504 | { | |
2505 | case 64: | |
2506 | return tdep->ppc_mq_regnum; | |
2507 | case 65: | |
2508 | return tdep->ppc_lr_regnum; | |
2509 | case 66: | |
2510 | return tdep->ppc_ctr_regnum; | |
2511 | case 76: | |
2512 | return tdep->ppc_xer_regnum; | |
2513 | case 109: | |
2514 | return tdep->ppc_vrsave_regnum; | |
18ed0c4e JB |
2515 | case 110: |
2516 | return tdep->ppc_vrsave_regnum - 1; /* vscr */ | |
867e2dc5 | 2517 | case 111: |
18ed0c4e | 2518 | return tdep->ppc_acc_regnum; |
867e2dc5 | 2519 | case 112: |
18ed0c4e | 2520 | return tdep->ppc_spefscr_regnum; |
9f744501 JB |
2521 | default: |
2522 | return num; | |
2523 | } | |
18ed0c4e | 2524 | } |
9f744501 | 2525 | |
9f744501 | 2526 | |
18ed0c4e JB |
2527 | /* Convert a Dwarf 2 register number to a GDB register number. */ |
2528 | static int | |
2529 | rs6000_dwarf2_reg_to_regnum (int num) | |
2530 | { | |
2531 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); | |
9f744501 | 2532 | |
18ed0c4e JB |
2533 | if (0 <= num && num <= 31) |
2534 | return tdep->ppc_gp0_regnum + num; | |
2535 | else if (32 <= num && num <= 63) | |
2536 | /* FIXME: jimb/2004-05-05: What should we do when the debug info | |
2537 | specifies registers the architecture doesn't have? Our | |
2538 | callers don't check the value we return. */ | |
2539 | return tdep->ppc_fp0_regnum + (num - 32); | |
2540 | else if (1124 <= num && num < 1124 + 32) | |
2541 | return tdep->ppc_vr0_regnum + (num - 1124); | |
2542 | else if (1200 <= num && num < 1200 + 32) | |
2543 | return tdep->ppc_ev0_regnum + (num - 1200); | |
2544 | else | |
2545 | switch (num) | |
2546 | { | |
a489f789 AS |
2547 | case 64: |
2548 | return tdep->ppc_cr_regnum; | |
18ed0c4e JB |
2549 | case 67: |
2550 | return tdep->ppc_vrsave_regnum - 1; /* vscr */ | |
2551 | case 99: | |
2552 | return tdep->ppc_acc_regnum; | |
2553 | case 100: | |
2554 | return tdep->ppc_mq_regnum; | |
2555 | case 101: | |
2556 | return tdep->ppc_xer_regnum; | |
2557 | case 108: | |
2558 | return tdep->ppc_lr_regnum; | |
2559 | case 109: | |
2560 | return tdep->ppc_ctr_regnum; | |
2561 | case 356: | |
2562 | return tdep->ppc_vrsave_regnum; | |
2563 | case 612: | |
2564 | return tdep->ppc_spefscr_regnum; | |
2565 | default: | |
2566 | return num; | |
2567 | } | |
2188cbdd EZ |
2568 | } |
2569 | ||
4fc771b8 DJ |
2570 | /* Translate a .eh_frame register to DWARF register, or adjust a |
2571 | .debug_frame register. */ | |
2572 | ||
2573 | static int | |
2574 | rs6000_adjust_frame_regnum (struct gdbarch *gdbarch, int num, int eh_frame_p) | |
2575 | { | |
2576 | /* GCC releases before 3.4 use GCC internal register numbering in | |
2577 | .debug_frame (and .debug_info, et cetera). The numbering is | |
2578 | different from the standard SysV numbering for everything except | |
2579 | for GPRs and FPRs. We can not detect this problem in most cases | |
2580 | - to get accurate debug info for variables living in lr, ctr, v0, | |
2581 | et cetera, use a newer version of GCC. But we must detect | |
2582 | one important case - lr is in column 65 in .debug_frame output, | |
2583 | instead of 108. | |
2584 | ||
2585 | GCC 3.4, and the "hammer" branch, have a related problem. They | |
2586 | record lr register saves in .debug_frame as 108, but still record | |
2587 | the return column as 65. We fix that up too. | |
2588 | ||
2589 | We can do this because 65 is assigned to fpsr, and GCC never | |
2590 | generates debug info referring to it. To add support for | |
2591 | handwritten debug info that restores fpsr, we would need to add a | |
2592 | producer version check to this. */ | |
2593 | if (!eh_frame_p) | |
2594 | { | |
2595 | if (num == 65) | |
2596 | return 108; | |
2597 | else | |
2598 | return num; | |
2599 | } | |
2600 | ||
2601 | /* .eh_frame is GCC specific. For binary compatibility, it uses GCC | |
2602 | internal register numbering; translate that to the standard DWARF2 | |
2603 | register numbering. */ | |
2604 | if (0 <= num && num <= 63) /* r0-r31,fp0-fp31 */ | |
2605 | return num; | |
2606 | else if (68 <= num && num <= 75) /* cr0-cr8 */ | |
2607 | return num - 68 + 86; | |
2608 | else if (77 <= num && num <= 108) /* vr0-vr31 */ | |
2609 | return num - 77 + 1124; | |
2610 | else | |
2611 | switch (num) | |
2612 | { | |
2613 | case 64: /* mq */ | |
2614 | return 100; | |
2615 | case 65: /* lr */ | |
2616 | return 108; | |
2617 | case 66: /* ctr */ | |
2618 | return 109; | |
2619 | case 76: /* xer */ | |
2620 | return 101; | |
2621 | case 109: /* vrsave */ | |
2622 | return 356; | |
2623 | case 110: /* vscr */ | |
2624 | return 67; | |
2625 | case 111: /* spe_acc */ | |
2626 | return 99; | |
2627 | case 112: /* spefscr */ | |
2628 | return 612; | |
2629 | default: | |
2630 | return num; | |
2631 | } | |
2632 | } | |
c906108c | 2633 | \f |
e2d0e7eb | 2634 | /* Support for CONVERT_FROM_FUNC_PTR_ADDR (ARCH, ADDR, TARG). |
7a78ae4e ND |
2635 | |
2636 | Usually a function pointer's representation is simply the address | |
2637 | of the function. On the RS/6000 however, a function pointer is | |
8ba0209f | 2638 | represented by a pointer to an OPD entry. This OPD entry contains |
7a78ae4e ND |
2639 | three words, the first word is the address of the function, the |
2640 | second word is the TOC pointer (r2), and the third word is the | |
2641 | static chain value. Throughout GDB it is currently assumed that a | |
2642 | function pointer contains the address of the function, which is not | |
2643 | easy to fix. In addition, the conversion of a function address to | |
8ba0209f | 2644 | a function pointer would require allocation of an OPD entry in the |
7a78ae4e ND |
2645 | inferior's memory space, with all its drawbacks. To be able to |
2646 | call C++ virtual methods in the inferior (which are called via | |
f517ea4e | 2647 | function pointers), find_function_addr uses this function to get the |
7a78ae4e ND |
2648 | function address from a function pointer. */ |
2649 | ||
f517ea4e PS |
2650 | /* Return real function address if ADDR (a function pointer) is in the data |
2651 | space and is therefore a special function pointer. */ | |
c906108c | 2652 | |
b9362cc7 | 2653 | static CORE_ADDR |
e2d0e7eb AC |
2654 | rs6000_convert_from_func_ptr_addr (struct gdbarch *gdbarch, |
2655 | CORE_ADDR addr, | |
2656 | struct target_ops *targ) | |
c906108c SS |
2657 | { |
2658 | struct obj_section *s; | |
2659 | ||
2660 | s = find_pc_section (addr); | |
2661 | if (s && s->the_bfd_section->flags & SEC_CODE) | |
7a78ae4e | 2662 | return addr; |
c906108c | 2663 | |
7a78ae4e | 2664 | /* ADDR is in the data space, so it's a special function pointer. */ |
7f68ac27 | 2665 | return read_memory_addr (addr, gdbarch_tdep (gdbarch)->wordsize); |
c906108c | 2666 | } |
c906108c | 2667 | \f |
c5aa993b | 2668 | |
7a78ae4e | 2669 | /* Handling the various POWER/PowerPC variants. */ |
c906108c SS |
2670 | |
2671 | ||
7a78ae4e ND |
2672 | /* The arrays here called registers_MUMBLE hold information about available |
2673 | registers. | |
c906108c SS |
2674 | |
2675 | For each family of PPC variants, I've tried to isolate out the | |
2676 | common registers and put them up front, so that as long as you get | |
2677 | the general family right, GDB will correctly identify the registers | |
2678 | common to that family. The common register sets are: | |
2679 | ||
2680 | For the 60x family: hid0 hid1 iabr dabr pir | |
2681 | ||
2682 | For the 505 and 860 family: eie eid nri | |
2683 | ||
2684 | For the 403 and 403GC: icdbdr esr dear evpr cdbcr tsr tcr pit tbhi | |
c5aa993b JM |
2685 | tblo srr2 srr3 dbsr dbcr iac1 iac2 dac1 dac2 dccr iccr pbl1 |
2686 | pbu1 pbl2 pbu2 | |
c906108c SS |
2687 | |
2688 | Most of these register groups aren't anything formal. I arrived at | |
2689 | them by looking at the registers that occurred in more than one | |
6f5987a6 KB |
2690 | processor. |
2691 | ||
2692 | Note: kevinb/2002-04-30: Support for the fpscr register was added | |
2693 | during April, 2002. Slot 70 is being used for PowerPC and slot 71 | |
2694 | for Power. For PowerPC, slot 70 was unused and was already in the | |
2695 | PPC_UISA_SPRS which is ideally where fpscr should go. For Power, | |
2696 | slot 70 was being used for "mq", so the next available slot (71) | |
2697 | was chosen. It would have been nice to be able to make the | |
2698 | register numbers the same across processor cores, but this wasn't | |
2699 | possible without either 1) renumbering some registers for some | |
2700 | processors or 2) assigning fpscr to a really high slot that's | |
2701 | larger than any current register number. Doing (1) is bad because | |
2702 | existing stubs would break. Doing (2) is undesirable because it | |
2703 | would introduce a really large gap between fpscr and the rest of | |
2704 | the registers for most processors. */ | |
7a78ae4e | 2705 | |
64366f1c | 2706 | /* Convenience macros for populating register arrays. */ |
7a78ae4e | 2707 | |
64366f1c | 2708 | /* Within another macro, convert S to a string. */ |
7a78ae4e ND |
2709 | |
2710 | #define STR(s) #s | |
2711 | ||
2712 | /* Return a struct reg defining register NAME that's 32 bits on 32-bit systems | |
64366f1c | 2713 | and 64 bits on 64-bit systems. */ |
13ac140c | 2714 | #define R(name) { STR(name), 4, 8, 0, 0, -1 } |
7a78ae4e ND |
2715 | |
2716 | /* Return a struct reg defining register NAME that's 32 bits on all | |
64366f1c | 2717 | systems. */ |
13ac140c | 2718 | #define R4(name) { STR(name), 4, 4, 0, 0, -1 } |
7a78ae4e ND |
2719 | |
2720 | /* Return a struct reg defining register NAME that's 64 bits on all | |
64366f1c | 2721 | systems. */ |
13ac140c | 2722 | #define R8(name) { STR(name), 8, 8, 0, 0, -1 } |
7a78ae4e | 2723 | |
1fcc0bb8 | 2724 | /* Return a struct reg defining register NAME that's 128 bits on all |
64366f1c | 2725 | systems. */ |
13ac140c | 2726 | #define R16(name) { STR(name), 16, 16, 0, 0, -1 } |
1fcc0bb8 | 2727 | |
64366f1c | 2728 | /* Return a struct reg defining floating-point register NAME. */ |
13ac140c | 2729 | #define F(name) { STR(name), 8, 8, 1, 0, -1 } |
489461e2 | 2730 | |
6ced10dd JB |
2731 | /* Return a struct reg defining a pseudo register NAME that is 64 bits |
2732 | long on all systems. */ | |
2733 | #define P8(name) { STR(name), 8, 8, 0, 1, -1 } | |
7a78ae4e ND |
2734 | |
2735 | /* Return a struct reg defining register NAME that's 32 bits on 32-bit | |
64366f1c | 2736 | systems and that doesn't exist on 64-bit systems. */ |
13ac140c | 2737 | #define R32(name) { STR(name), 4, 0, 0, 0, -1 } |
7a78ae4e ND |
2738 | |
2739 | /* Return a struct reg defining register NAME that's 64 bits on 64-bit | |
64366f1c | 2740 | systems and that doesn't exist on 32-bit systems. */ |
13ac140c | 2741 | #define R64(name) { STR(name), 0, 8, 0, 0, -1 } |
7a78ae4e | 2742 | |
64366f1c | 2743 | /* Return a struct reg placeholder for a register that doesn't exist. */ |
13ac140c | 2744 | #define R0 { 0, 0, 0, 0, 0, -1 } |
7a78ae4e | 2745 | |
6ced10dd JB |
2746 | /* Return a struct reg defining an anonymous raw register that's 32 |
2747 | bits on all systems. */ | |
2748 | #define A4 { 0, 4, 4, 0, 0, -1 } | |
2749 | ||
13ac140c JB |
2750 | /* Return a struct reg defining an SPR named NAME that is 32 bits on |
2751 | 32-bit systems and 64 bits on 64-bit systems. */ | |
2752 | #define S(name) { STR(name), 4, 8, 0, 0, ppc_spr_ ## name } | |
2753 | ||
2754 | /* Return a struct reg defining an SPR named NAME that is 32 bits on | |
2755 | all systems. */ | |
2756 | #define S4(name) { STR(name), 4, 4, 0, 0, ppc_spr_ ## name } | |
2757 | ||
2758 | /* Return a struct reg defining an SPR named NAME that is 32 bits on | |
2759 | all systems, and whose SPR number is NUMBER. */ | |
2760 | #define SN4(name, number) { STR(name), 4, 4, 0, 0, (number) } | |
2761 | ||
2762 | /* Return a struct reg defining an SPR named NAME that's 64 bits on | |
2763 | 64-bit systems and that doesn't exist on 32-bit systems. */ | |
2764 | #define S64(name) { STR(name), 0, 8, 0, 0, ppc_spr_ ## name } | |
2765 | ||
7a78ae4e ND |
2766 | /* UISA registers common across all architectures, including POWER. */ |
2767 | ||
2768 | #define COMMON_UISA_REGS \ | |
2769 | /* 0 */ R(r0), R(r1), R(r2), R(r3), R(r4), R(r5), R(r6), R(r7), \ | |
2770 | /* 8 */ R(r8), R(r9), R(r10),R(r11),R(r12),R(r13),R(r14),R(r15), \ | |
2771 | /* 16 */ R(r16),R(r17),R(r18),R(r19),R(r20),R(r21),R(r22),R(r23), \ | |
2772 | /* 24 */ R(r24),R(r25),R(r26),R(r27),R(r28),R(r29),R(r30),R(r31), \ | |
2773 | /* 32 */ F(f0), F(f1), F(f2), F(f3), F(f4), F(f5), F(f6), F(f7), \ | |
2774 | /* 40 */ F(f8), F(f9), F(f10),F(f11),F(f12),F(f13),F(f14),F(f15), \ | |
2775 | /* 48 */ F(f16),F(f17),F(f18),F(f19),F(f20),F(f21),F(f22),F(f23), \ | |
2776 | /* 56 */ F(f24),F(f25),F(f26),F(f27),F(f28),F(f29),F(f30),F(f31), \ | |
2777 | /* 64 */ R(pc), R(ps) | |
2778 | ||
2779 | /* UISA-level SPRs for PowerPC. */ | |
2780 | #define PPC_UISA_SPRS \ | |
13ac140c | 2781 | /* 66 */ R4(cr), S(lr), S(ctr), S4(xer), R4(fpscr) |
7a78ae4e | 2782 | |
c8001721 EZ |
2783 | /* UISA-level SPRs for PowerPC without floating point support. */ |
2784 | #define PPC_UISA_NOFP_SPRS \ | |
13ac140c | 2785 | /* 66 */ R4(cr), S(lr), S(ctr), S4(xer), R0 |
c8001721 | 2786 | |
7a78ae4e ND |
2787 | /* Segment registers, for PowerPC. */ |
2788 | #define PPC_SEGMENT_REGS \ | |
2789 | /* 71 */ R32(sr0), R32(sr1), R32(sr2), R32(sr3), \ | |
2790 | /* 75 */ R32(sr4), R32(sr5), R32(sr6), R32(sr7), \ | |
2791 | /* 79 */ R32(sr8), R32(sr9), R32(sr10), R32(sr11), \ | |
2792 | /* 83 */ R32(sr12), R32(sr13), R32(sr14), R32(sr15) | |
2793 | ||
2794 | /* OEA SPRs for PowerPC. */ | |
2795 | #define PPC_OEA_SPRS \ | |
13ac140c JB |
2796 | /* 87 */ S4(pvr), \ |
2797 | /* 88 */ S(ibat0u), S(ibat0l), S(ibat1u), S(ibat1l), \ | |
2798 | /* 92 */ S(ibat2u), S(ibat2l), S(ibat3u), S(ibat3l), \ | |
2799 | /* 96 */ S(dbat0u), S(dbat0l), S(dbat1u), S(dbat1l), \ | |
2800 | /* 100 */ S(dbat2u), S(dbat2l), S(dbat3u), S(dbat3l), \ | |
2801 | /* 104 */ S(sdr1), S64(asr), S(dar), S4(dsisr), \ | |
2802 | /* 108 */ S(sprg0), S(sprg1), S(sprg2), S(sprg3), \ | |
2803 | /* 112 */ S(srr0), S(srr1), S(tbl), S(tbu), \ | |
2804 | /* 116 */ S4(dec), S(dabr), S4(ear) | |
7a78ae4e | 2805 | |
64366f1c | 2806 | /* AltiVec registers. */ |
1fcc0bb8 EZ |
2807 | #define PPC_ALTIVEC_REGS \ |
2808 | /*119*/R16(vr0), R16(vr1), R16(vr2), R16(vr3), R16(vr4), R16(vr5), R16(vr6), R16(vr7), \ | |
2809 | /*127*/R16(vr8), R16(vr9), R16(vr10),R16(vr11),R16(vr12),R16(vr13),R16(vr14),R16(vr15), \ | |
2810 | /*135*/R16(vr16),R16(vr17),R16(vr18),R16(vr19),R16(vr20),R16(vr21),R16(vr22),R16(vr23), \ | |
2811 | /*143*/R16(vr24),R16(vr25),R16(vr26),R16(vr27),R16(vr28),R16(vr29),R16(vr30),R16(vr31), \ | |
2812 | /*151*/R4(vscr), R4(vrsave) | |
2813 | ||
c8001721 | 2814 | |
6ced10dd JB |
2815 | /* On machines supporting the SPE APU, the general-purpose registers |
2816 | are 64 bits long. There are SIMD vector instructions to treat them | |
2817 | as pairs of floats, but the rest of the instruction set treats them | |
2818 | as 32-bit registers, and only operates on their lower halves. | |
2819 | ||
2820 | In the GDB regcache, we treat their high and low halves as separate | |
2821 | registers. The low halves we present as the general-purpose | |
2822 | registers, and then we have pseudo-registers that stitch together | |
2823 | the upper and lower halves and present them as pseudo-registers. */ | |
2824 | ||
2825 | /* SPE GPR lower halves --- raw registers. */ | |
2826 | #define PPC_SPE_GP_REGS \ | |
2827 | /* 0 */ R4(r0), R4(r1), R4(r2), R4(r3), R4(r4), R4(r5), R4(r6), R4(r7), \ | |
2828 | /* 8 */ R4(r8), R4(r9), R4(r10),R4(r11),R4(r12),R4(r13),R4(r14),R4(r15), \ | |
2829 | /* 16 */ R4(r16),R4(r17),R4(r18),R4(r19),R4(r20),R4(r21),R4(r22),R4(r23), \ | |
2830 | /* 24 */ R4(r24),R4(r25),R4(r26),R4(r27),R4(r28),R4(r29),R4(r30),R4(r31) | |
2831 | ||
2832 | /* SPE GPR upper halves --- anonymous raw registers. */ | |
2833 | #define PPC_SPE_UPPER_GP_REGS \ | |
2834 | /* 0 */ A4, A4, A4, A4, A4, A4, A4, A4, \ | |
2835 | /* 8 */ A4, A4, A4, A4, A4, A4, A4, A4, \ | |
2836 | /* 16 */ A4, A4, A4, A4, A4, A4, A4, A4, \ | |
2837 | /* 24 */ A4, A4, A4, A4, A4, A4, A4, A4 | |
2838 | ||
2839 | /* SPE GPR vector registers --- pseudo registers based on underlying | |
2840 | gprs and the anonymous upper half raw registers. */ | |
2841 | #define PPC_EV_PSEUDO_REGS \ | |
2842 | /* 0*/P8(ev0), P8(ev1), P8(ev2), P8(ev3), P8(ev4), P8(ev5), P8(ev6), P8(ev7), \ | |
2843 | /* 8*/P8(ev8), P8(ev9), P8(ev10),P8(ev11),P8(ev12),P8(ev13),P8(ev14),P8(ev15),\ | |
2844 | /*16*/P8(ev16),P8(ev17),P8(ev18),P8(ev19),P8(ev20),P8(ev21),P8(ev22),P8(ev23),\ | |
2845 | /*24*/P8(ev24),P8(ev25),P8(ev26),P8(ev27),P8(ev28),P8(ev29),P8(ev30),P8(ev31) | |
c8001721 | 2846 | |
7a78ae4e | 2847 | /* IBM POWER (pre-PowerPC) architecture, user-level view. We only cover |
64366f1c | 2848 | user-level SPR's. */ |
7a78ae4e | 2849 | static const struct reg registers_power[] = |
c906108c | 2850 | { |
7a78ae4e | 2851 | COMMON_UISA_REGS, |
13ac140c | 2852 | /* 66 */ R4(cnd), S(lr), S(cnt), S4(xer), S4(mq), |
e3f36dbd | 2853 | /* 71 */ R4(fpscr) |
c906108c SS |
2854 | }; |
2855 | ||
7a78ae4e | 2856 | /* PowerPC UISA - a PPC processor as viewed by user-level code. A UISA-only |
64366f1c | 2857 | view of the PowerPC. */ |
7a78ae4e | 2858 | static const struct reg registers_powerpc[] = |
c906108c | 2859 | { |
7a78ae4e | 2860 | COMMON_UISA_REGS, |
1fcc0bb8 EZ |
2861 | PPC_UISA_SPRS, |
2862 | PPC_ALTIVEC_REGS | |
c906108c SS |
2863 | }; |
2864 | ||
13ac140c JB |
2865 | /* IBM PowerPC 403. |
2866 | ||
2867 | Some notes about the "tcr" special-purpose register: | |
2868 | - On the 403 and 403GC, SPR 986 is named "tcr", and it controls the | |
2869 | 403's programmable interval timer, fixed interval timer, and | |
2870 | watchdog timer. | |
2871 | - On the 602, SPR 984 is named "tcr", and it controls the 602's | |
2872 | watchdog timer, and nothing else. | |
2873 | ||
2874 | Some of the fields are similar between the two, but they're not | |
2875 | compatible with each other. Since the two variants have different | |
2876 | registers, with different numbers, but the same name, we can't | |
2877 | splice the register name to get the SPR number. */ | |
7a78ae4e | 2878 | static const struct reg registers_403[] = |
c5aa993b | 2879 | { |
7a78ae4e ND |
2880 | COMMON_UISA_REGS, |
2881 | PPC_UISA_SPRS, | |
2882 | PPC_SEGMENT_REGS, | |
2883 | PPC_OEA_SPRS, | |
13ac140c JB |
2884 | /* 119 */ S(icdbdr), S(esr), S(dear), S(evpr), |
2885 | /* 123 */ S(cdbcr), S(tsr), SN4(tcr, ppc_spr_403_tcr), S(pit), | |
2886 | /* 127 */ S(tbhi), S(tblo), S(srr2), S(srr3), | |
2887 | /* 131 */ S(dbsr), S(dbcr), S(iac1), S(iac2), | |
2888 | /* 135 */ S(dac1), S(dac2), S(dccr), S(iccr), | |
2889 | /* 139 */ S(pbl1), S(pbu1), S(pbl2), S(pbu2) | |
c906108c SS |
2890 | }; |
2891 | ||
13ac140c JB |
2892 | /* IBM PowerPC 403GC. |
2893 | See the comments about 'tcr' for the 403, above. */ | |
7a78ae4e | 2894 | static const struct reg registers_403GC[] = |
c5aa993b | 2895 | { |
7a78ae4e ND |
2896 | COMMON_UISA_REGS, |
2897 | PPC_UISA_SPRS, | |
2898 | PPC_SEGMENT_REGS, | |
2899 | PPC_OEA_SPRS, | |
13ac140c JB |
2900 | /* 119 */ S(icdbdr), S(esr), S(dear), S(evpr), |
2901 | /* 123 */ S(cdbcr), S(tsr), SN4(tcr, ppc_spr_403_tcr), S(pit), | |
2902 | /* 127 */ S(tbhi), S(tblo), S(srr2), S(srr3), | |
2903 | /* 131 */ S(dbsr), S(dbcr), S(iac1), S(iac2), | |
2904 | /* 135 */ S(dac1), S(dac2), S(dccr), S(iccr), | |
2905 | /* 139 */ S(pbl1), S(pbu1), S(pbl2), S(pbu2), | |
2906 | /* 143 */ S(zpr), S(pid), S(sgr), S(dcwr), | |
2907 | /* 147 */ S(tbhu), S(tblu) | |
c906108c SS |
2908 | }; |
2909 | ||
64366f1c | 2910 | /* Motorola PowerPC 505. */ |
7a78ae4e | 2911 | static const struct reg registers_505[] = |
c5aa993b | 2912 | { |
7a78ae4e ND |
2913 | COMMON_UISA_REGS, |
2914 | PPC_UISA_SPRS, | |
2915 | PPC_SEGMENT_REGS, | |
2916 | PPC_OEA_SPRS, | |
13ac140c | 2917 | /* 119 */ S(eie), S(eid), S(nri) |
c906108c SS |
2918 | }; |
2919 | ||
64366f1c | 2920 | /* Motorola PowerPC 860 or 850. */ |
7a78ae4e | 2921 | static const struct reg registers_860[] = |
c5aa993b | 2922 | { |
7a78ae4e ND |
2923 | COMMON_UISA_REGS, |
2924 | PPC_UISA_SPRS, | |
2925 | PPC_SEGMENT_REGS, | |
2926 | PPC_OEA_SPRS, | |
13ac140c JB |
2927 | /* 119 */ S(eie), S(eid), S(nri), S(cmpa), |
2928 | /* 123 */ S(cmpb), S(cmpc), S(cmpd), S(icr), | |
2929 | /* 127 */ S(der), S(counta), S(countb), S(cmpe), | |
2930 | /* 131 */ S(cmpf), S(cmpg), S(cmph), S(lctrl1), | |
2931 | /* 135 */ S(lctrl2), S(ictrl), S(bar), S(ic_cst), | |
2932 | /* 139 */ S(ic_adr), S(ic_dat), S(dc_cst), S(dc_adr), | |
2933 | /* 143 */ S(dc_dat), S(dpdr), S(dpir), S(immr), | |
2934 | /* 147 */ S(mi_ctr), S(mi_ap), S(mi_epn), S(mi_twc), | |
2935 | /* 151 */ S(mi_rpn), S(md_ctr), S(m_casid), S(md_ap), | |
2936 | /* 155 */ S(md_epn), S(m_twb), S(md_twc), S(md_rpn), | |
2937 | /* 159 */ S(m_tw), S(mi_dbcam), S(mi_dbram0), S(mi_dbram1), | |
2938 | /* 163 */ S(md_dbcam), S(md_dbram0), S(md_dbram1) | |
c906108c SS |
2939 | }; |
2940 | ||
7a78ae4e ND |
2941 | /* Motorola PowerPC 601. Note that the 601 has different register numbers |
2942 | for reading and writing RTCU and RTCL. However, how one reads and writes a | |
c906108c | 2943 | register is the stub's problem. */ |
7a78ae4e | 2944 | static const struct reg registers_601[] = |
c5aa993b | 2945 | { |
7a78ae4e ND |
2946 | COMMON_UISA_REGS, |
2947 | PPC_UISA_SPRS, | |
2948 | PPC_SEGMENT_REGS, | |
2949 | PPC_OEA_SPRS, | |
13ac140c JB |
2950 | /* 119 */ S(hid0), S(hid1), S(iabr), S(dabr), |
2951 | /* 123 */ S(pir), S(mq), S(rtcu), S(rtcl) | |
c906108c SS |
2952 | }; |
2953 | ||
13ac140c JB |
2954 | /* Motorola PowerPC 602. |
2955 | See the notes under the 403 about 'tcr'. */ | |
7a78ae4e | 2956 | static const struct reg registers_602[] = |
c5aa993b | 2957 | { |
7a78ae4e ND |
2958 | COMMON_UISA_REGS, |
2959 | PPC_UISA_SPRS, | |
2960 | PPC_SEGMENT_REGS, | |
2961 | PPC_OEA_SPRS, | |
13ac140c JB |
2962 | /* 119 */ S(hid0), S(hid1), S(iabr), R0, |
2963 | /* 123 */ R0, SN4(tcr, ppc_spr_602_tcr), S(ibr), S(esasrr), | |
2964 | /* 127 */ S(sebr), S(ser), S(sp), S(lt) | |
c906108c SS |
2965 | }; |
2966 | ||
64366f1c | 2967 | /* Motorola/IBM PowerPC 603 or 603e. */ |
7a78ae4e | 2968 | static const struct reg registers_603[] = |
c5aa993b | 2969 | { |
7a78ae4e ND |
2970 | COMMON_UISA_REGS, |
2971 | PPC_UISA_SPRS, | |
2972 | PPC_SEGMENT_REGS, | |
2973 | PPC_OEA_SPRS, | |
13ac140c JB |
2974 | /* 119 */ S(hid0), S(hid1), S(iabr), R0, |
2975 | /* 123 */ R0, S(dmiss), S(dcmp), S(hash1), | |
2976 | /* 127 */ S(hash2), S(imiss), S(icmp), S(rpa) | |
c906108c SS |
2977 | }; |
2978 | ||
64366f1c | 2979 | /* Motorola PowerPC 604 or 604e. */ |
7a78ae4e | 2980 | static const struct reg registers_604[] = |
c5aa993b | 2981 | { |
7a78ae4e ND |
2982 | COMMON_UISA_REGS, |
2983 | PPC_UISA_SPRS, | |
2984 | PPC_SEGMENT_REGS, | |
2985 | PPC_OEA_SPRS, | |
13ac140c JB |
2986 | /* 119 */ S(hid0), S(hid1), S(iabr), S(dabr), |
2987 | /* 123 */ S(pir), S(mmcr0), S(pmc1), S(pmc2), | |
2988 | /* 127 */ S(sia), S(sda) | |
c906108c SS |
2989 | }; |
2990 | ||
64366f1c | 2991 | /* Motorola/IBM PowerPC 750 or 740. */ |
7a78ae4e | 2992 | static const struct reg registers_750[] = |
c5aa993b | 2993 | { |
7a78ae4e ND |
2994 | COMMON_UISA_REGS, |
2995 | PPC_UISA_SPRS, | |
2996 | PPC_SEGMENT_REGS, | |
2997 | PPC_OEA_SPRS, | |
13ac140c JB |
2998 | /* 119 */ S(hid0), S(hid1), S(iabr), S(dabr), |
2999 | /* 123 */ R0, S(ummcr0), S(upmc1), S(upmc2), | |
3000 | /* 127 */ S(usia), S(ummcr1), S(upmc3), S(upmc4), | |
3001 | /* 131 */ S(mmcr0), S(pmc1), S(pmc2), S(sia), | |
3002 | /* 135 */ S(mmcr1), S(pmc3), S(pmc4), S(l2cr), | |
3003 | /* 139 */ S(ictc), S(thrm1), S(thrm2), S(thrm3) | |
c906108c SS |
3004 | }; |
3005 | ||
3006 | ||
64366f1c | 3007 | /* Motorola PowerPC 7400. */ |
1fcc0bb8 EZ |
3008 | static const struct reg registers_7400[] = |
3009 | { | |
3010 | /* gpr0-gpr31, fpr0-fpr31 */ | |
3011 | COMMON_UISA_REGS, | |
13c7b1ca | 3012 | /* cr, lr, ctr, xer, fpscr */ |
1fcc0bb8 EZ |
3013 | PPC_UISA_SPRS, |
3014 | /* sr0-sr15 */ | |
3015 | PPC_SEGMENT_REGS, | |
3016 | PPC_OEA_SPRS, | |
3017 | /* vr0-vr31, vrsave, vscr */ | |
3018 | PPC_ALTIVEC_REGS | |
3019 | /* FIXME? Add more registers? */ | |
3020 | }; | |
3021 | ||
c8001721 EZ |
3022 | /* Motorola e500. */ |
3023 | static const struct reg registers_e500[] = | |
3024 | { | |
6ced10dd JB |
3025 | /* 0 .. 31 */ PPC_SPE_GP_REGS, |
3026 | /* 32 .. 63 */ PPC_SPE_UPPER_GP_REGS, | |
3027 | /* 64 .. 65 */ R(pc), R(ps), | |
3028 | /* 66 .. 70 */ PPC_UISA_NOFP_SPRS, | |
3029 | /* 71 .. 72 */ R8(acc), S4(spefscr), | |
338ef23d AC |
3030 | /* NOTE: Add new registers here the end of the raw register |
3031 | list and just before the first pseudo register. */ | |
6ced10dd | 3032 | /* 73 .. 104 */ PPC_EV_PSEUDO_REGS |
c8001721 EZ |
3033 | }; |
3034 | ||
c906108c | 3035 | /* Information about a particular processor variant. */ |
7a78ae4e | 3036 | |
c906108c | 3037 | struct variant |
c5aa993b JM |
3038 | { |
3039 | /* Name of this variant. */ | |
3040 | char *name; | |
c906108c | 3041 | |
c5aa993b JM |
3042 | /* English description of the variant. */ |
3043 | char *description; | |
c906108c | 3044 | |
64366f1c | 3045 | /* bfd_arch_info.arch corresponding to variant. */ |
7a78ae4e ND |
3046 | enum bfd_architecture arch; |
3047 | ||
64366f1c | 3048 | /* bfd_arch_info.mach corresponding to variant. */ |
7a78ae4e ND |
3049 | unsigned long mach; |
3050 | ||
489461e2 EZ |
3051 | /* Number of real registers. */ |
3052 | int nregs; | |
3053 | ||
3054 | /* Number of pseudo registers. */ | |
3055 | int npregs; | |
3056 | ||
3057 | /* Number of total registers (the sum of nregs and npregs). */ | |
3058 | int num_tot_regs; | |
3059 | ||
c5aa993b JM |
3060 | /* Table of register names; registers[R] is the name of the register |
3061 | number R. */ | |
7a78ae4e | 3062 | const struct reg *regs; |
c5aa993b | 3063 | }; |
c906108c | 3064 | |
489461e2 EZ |
3065 | #define tot_num_registers(list) (sizeof (list) / sizeof((list)[0])) |
3066 | ||
3067 | static int | |
3068 | num_registers (const struct reg *reg_list, int num_tot_regs) | |
3069 | { | |
3070 | int i; | |
3071 | int nregs = 0; | |
3072 | ||
3073 | for (i = 0; i < num_tot_regs; i++) | |
3074 | if (!reg_list[i].pseudo) | |
3075 | nregs++; | |
3076 | ||
3077 | return nregs; | |
3078 | } | |
3079 | ||
3080 | static int | |
3081 | num_pseudo_registers (const struct reg *reg_list, int num_tot_regs) | |
3082 | { | |
3083 | int i; | |
3084 | int npregs = 0; | |
3085 | ||
3086 | for (i = 0; i < num_tot_regs; i++) | |
3087 | if (reg_list[i].pseudo) | |
3088 | npregs ++; | |
3089 | ||
3090 | return npregs; | |
3091 | } | |
c906108c | 3092 | |
c906108c SS |
3093 | /* Information in this table comes from the following web sites: |
3094 | IBM: http://www.chips.ibm.com:80/products/embedded/ | |
3095 | Motorola: http://www.mot.com/SPS/PowerPC/ | |
3096 | ||
3097 | I'm sure I've got some of the variant descriptions not quite right. | |
3098 | Please report any inaccuracies you find to GDB's maintainer. | |
3099 | ||
3100 | If you add entries to this table, please be sure to allow the new | |
3101 | value as an argument to the --with-cpu flag, in configure.in. */ | |
3102 | ||
489461e2 | 3103 | static struct variant variants[] = |
c906108c | 3104 | { |
489461e2 | 3105 | |
7a78ae4e | 3106 | {"powerpc", "PowerPC user-level", bfd_arch_powerpc, |
489461e2 EZ |
3107 | bfd_mach_ppc, -1, -1, tot_num_registers (registers_powerpc), |
3108 | registers_powerpc}, | |
7a78ae4e | 3109 | {"power", "POWER user-level", bfd_arch_rs6000, |
489461e2 EZ |
3110 | bfd_mach_rs6k, -1, -1, tot_num_registers (registers_power), |
3111 | registers_power}, | |
7a78ae4e | 3112 | {"403", "IBM PowerPC 403", bfd_arch_powerpc, |
489461e2 EZ |
3113 | bfd_mach_ppc_403, -1, -1, tot_num_registers (registers_403), |
3114 | registers_403}, | |
7a78ae4e | 3115 | {"601", "Motorola PowerPC 601", bfd_arch_powerpc, |
489461e2 EZ |
3116 | bfd_mach_ppc_601, -1, -1, tot_num_registers (registers_601), |
3117 | registers_601}, | |
7a78ae4e | 3118 | {"602", "Motorola PowerPC 602", bfd_arch_powerpc, |
489461e2 EZ |
3119 | bfd_mach_ppc_602, -1, -1, tot_num_registers (registers_602), |
3120 | registers_602}, | |
7a78ae4e | 3121 | {"603", "Motorola/IBM PowerPC 603 or 603e", bfd_arch_powerpc, |
489461e2 EZ |
3122 | bfd_mach_ppc_603, -1, -1, tot_num_registers (registers_603), |
3123 | registers_603}, | |
7a78ae4e | 3124 | {"604", "Motorola PowerPC 604 or 604e", bfd_arch_powerpc, |
489461e2 EZ |
3125 | 604, -1, -1, tot_num_registers (registers_604), |
3126 | registers_604}, | |
7a78ae4e | 3127 | {"403GC", "IBM PowerPC 403GC", bfd_arch_powerpc, |
489461e2 EZ |
3128 | bfd_mach_ppc_403gc, -1, -1, tot_num_registers (registers_403GC), |
3129 | registers_403GC}, | |
7a78ae4e | 3130 | {"505", "Motorola PowerPC 505", bfd_arch_powerpc, |
489461e2 EZ |
3131 | bfd_mach_ppc_505, -1, -1, tot_num_registers (registers_505), |
3132 | registers_505}, | |
7a78ae4e | 3133 | {"860", "Motorola PowerPC 860 or 850", bfd_arch_powerpc, |
489461e2 EZ |
3134 | bfd_mach_ppc_860, -1, -1, tot_num_registers (registers_860), |
3135 | registers_860}, | |
7a78ae4e | 3136 | {"750", "Motorola/IBM PowerPC 750 or 740", bfd_arch_powerpc, |
489461e2 EZ |
3137 | bfd_mach_ppc_750, -1, -1, tot_num_registers (registers_750), |
3138 | registers_750}, | |
1fcc0bb8 | 3139 | {"7400", "Motorola/IBM PowerPC 7400 (G4)", bfd_arch_powerpc, |
489461e2 EZ |
3140 | bfd_mach_ppc_7400, -1, -1, tot_num_registers (registers_7400), |
3141 | registers_7400}, | |
c8001721 EZ |
3142 | {"e500", "Motorola PowerPC e500", bfd_arch_powerpc, |
3143 | bfd_mach_ppc_e500, -1, -1, tot_num_registers (registers_e500), | |
3144 | registers_e500}, | |
7a78ae4e | 3145 | |
5d57ee30 KB |
3146 | /* 64-bit */ |
3147 | {"powerpc64", "PowerPC 64-bit user-level", bfd_arch_powerpc, | |
489461e2 EZ |
3148 | bfd_mach_ppc64, -1, -1, tot_num_registers (registers_powerpc), |
3149 | registers_powerpc}, | |
7a78ae4e | 3150 | {"620", "Motorola PowerPC 620", bfd_arch_powerpc, |
489461e2 EZ |
3151 | bfd_mach_ppc_620, -1, -1, tot_num_registers (registers_powerpc), |
3152 | registers_powerpc}, | |
5d57ee30 | 3153 | {"630", "Motorola PowerPC 630", bfd_arch_powerpc, |
489461e2 EZ |
3154 | bfd_mach_ppc_630, -1, -1, tot_num_registers (registers_powerpc), |
3155 | registers_powerpc}, | |
7a78ae4e | 3156 | {"a35", "PowerPC A35", bfd_arch_powerpc, |
489461e2 EZ |
3157 | bfd_mach_ppc_a35, -1, -1, tot_num_registers (registers_powerpc), |
3158 | registers_powerpc}, | |
5d57ee30 | 3159 | {"rs64ii", "PowerPC rs64ii", bfd_arch_powerpc, |
489461e2 EZ |
3160 | bfd_mach_ppc_rs64ii, -1, -1, tot_num_registers (registers_powerpc), |
3161 | registers_powerpc}, | |
5d57ee30 | 3162 | {"rs64iii", "PowerPC rs64iii", bfd_arch_powerpc, |
489461e2 EZ |
3163 | bfd_mach_ppc_rs64iii, -1, -1, tot_num_registers (registers_powerpc), |
3164 | registers_powerpc}, | |
5d57ee30 | 3165 | |
64366f1c | 3166 | /* FIXME: I haven't checked the register sets of the following. */ |
7a78ae4e | 3167 | {"rs1", "IBM POWER RS1", bfd_arch_rs6000, |
489461e2 EZ |
3168 | bfd_mach_rs6k_rs1, -1, -1, tot_num_registers (registers_power), |
3169 | registers_power}, | |
7a78ae4e | 3170 | {"rsc", "IBM POWER RSC", bfd_arch_rs6000, |
489461e2 EZ |
3171 | bfd_mach_rs6k_rsc, -1, -1, tot_num_registers (registers_power), |
3172 | registers_power}, | |
7a78ae4e | 3173 | {"rs2", "IBM POWER RS2", bfd_arch_rs6000, |
489461e2 EZ |
3174 | bfd_mach_rs6k_rs2, -1, -1, tot_num_registers (registers_power), |
3175 | registers_power}, | |
7a78ae4e | 3176 | |
489461e2 | 3177 | {0, 0, 0, 0, 0, 0, 0, 0} |
c906108c SS |
3178 | }; |
3179 | ||
64366f1c | 3180 | /* Initialize the number of registers and pseudo registers in each variant. */ |
489461e2 EZ |
3181 | |
3182 | static void | |
3183 | init_variants (void) | |
3184 | { | |
3185 | struct variant *v; | |
3186 | ||
3187 | for (v = variants; v->name; v++) | |
3188 | { | |
3189 | if (v->nregs == -1) | |
3190 | v->nregs = num_registers (v->regs, v->num_tot_regs); | |
3191 | if (v->npregs == -1) | |
3192 | v->npregs = num_pseudo_registers (v->regs, v->num_tot_regs); | |
3193 | } | |
3194 | } | |
c906108c | 3195 | |
7a78ae4e | 3196 | /* Return the variant corresponding to architecture ARCH and machine number |
64366f1c | 3197 | MACH. If no such variant exists, return null. */ |
c906108c | 3198 | |
7a78ae4e ND |
3199 | static const struct variant * |
3200 | find_variant_by_arch (enum bfd_architecture arch, unsigned long mach) | |
c906108c | 3201 | { |
7a78ae4e | 3202 | const struct variant *v; |
c5aa993b | 3203 | |
7a78ae4e ND |
3204 | for (v = variants; v->name; v++) |
3205 | if (arch == v->arch && mach == v->mach) | |
3206 | return v; | |
c906108c | 3207 | |
7a78ae4e | 3208 | return NULL; |
c906108c | 3209 | } |
9364a0ef EZ |
3210 | |
3211 | static int | |
3212 | gdb_print_insn_powerpc (bfd_vma memaddr, disassemble_info *info) | |
3213 | { | |
ee4f0f76 DJ |
3214 | if (!info->disassembler_options) |
3215 | info->disassembler_options = "any"; | |
3216 | ||
4c6b5505 | 3217 | if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG) |
9364a0ef EZ |
3218 | return print_insn_big_powerpc (memaddr, info); |
3219 | else | |
3220 | return print_insn_little_powerpc (memaddr, info); | |
3221 | } | |
7a78ae4e | 3222 | \f |
61a65099 KB |
3223 | static CORE_ADDR |
3224 | rs6000_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame) | |
3225 | { | |
3e8c568d UW |
3226 | return frame_unwind_register_unsigned (next_frame, |
3227 | gdbarch_pc_regnum (current_gdbarch)); | |
61a65099 KB |
3228 | } |
3229 | ||
3230 | static struct frame_id | |
3231 | rs6000_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame) | |
3232 | { | |
3e8c568d UW |
3233 | return frame_id_build (frame_unwind_register_unsigned |
3234 | (next_frame, gdbarch_sp_regnum (current_gdbarch)), | |
3235 | frame_pc_unwind (next_frame)); | |
61a65099 KB |
3236 | } |
3237 | ||
3238 | struct rs6000_frame_cache | |
3239 | { | |
3240 | CORE_ADDR base; | |
3241 | CORE_ADDR initial_sp; | |
3242 | struct trad_frame_saved_reg *saved_regs; | |
3243 | }; | |
3244 | ||
3245 | static struct rs6000_frame_cache * | |
3246 | rs6000_frame_cache (struct frame_info *next_frame, void **this_cache) | |
3247 | { | |
3248 | struct rs6000_frame_cache *cache; | |
3249 | struct gdbarch *gdbarch = get_frame_arch (next_frame); | |
3250 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
3251 | struct rs6000_framedata fdata; | |
3252 | int wordsize = tdep->wordsize; | |
e10b1c4c | 3253 | CORE_ADDR func, pc; |
61a65099 KB |
3254 | |
3255 | if ((*this_cache) != NULL) | |
3256 | return (*this_cache); | |
3257 | cache = FRAME_OBSTACK_ZALLOC (struct rs6000_frame_cache); | |
3258 | (*this_cache) = cache; | |
3259 | cache->saved_regs = trad_frame_alloc_saved_regs (next_frame); | |
3260 | ||
93d42b30 | 3261 | func = frame_func_unwind (next_frame, NORMAL_FRAME); |
e10b1c4c DJ |
3262 | pc = frame_pc_unwind (next_frame); |
3263 | skip_prologue (func, pc, &fdata); | |
3264 | ||
3265 | /* Figure out the parent's stack pointer. */ | |
3266 | ||
3267 | /* NOTE: cagney/2002-04-14: The ->frame points to the inner-most | |
3268 | address of the current frame. Things might be easier if the | |
3269 | ->frame pointed to the outer-most address of the frame. In | |
3270 | the mean time, the address of the prev frame is used as the | |
3271 | base address of this frame. */ | |
3e8c568d UW |
3272 | cache->base = frame_unwind_register_unsigned |
3273 | (next_frame, gdbarch_sp_regnum (current_gdbarch)); | |
e10b1c4c DJ |
3274 | |
3275 | /* If the function appears to be frameless, check a couple of likely | |
3276 | indicators that we have simply failed to find the frame setup. | |
3277 | Two common cases of this are missing symbols (i.e. | |
3278 | frame_func_unwind returns the wrong address or 0), and assembly | |
3279 | stubs which have a fast exit path but set up a frame on the slow | |
3280 | path. | |
3281 | ||
3282 | If the LR appears to return to this function, then presume that | |
3283 | we have an ABI compliant frame that we failed to find. */ | |
3284 | if (fdata.frameless && fdata.lr_offset == 0) | |
61a65099 | 3285 | { |
e10b1c4c DJ |
3286 | CORE_ADDR saved_lr; |
3287 | int make_frame = 0; | |
3288 | ||
3289 | saved_lr = frame_unwind_register_unsigned (next_frame, | |
3290 | tdep->ppc_lr_regnum); | |
3291 | if (func == 0 && saved_lr == pc) | |
3292 | make_frame = 1; | |
3293 | else if (func != 0) | |
3294 | { | |
3295 | CORE_ADDR saved_func = get_pc_function_start (saved_lr); | |
3296 | if (func == saved_func) | |
3297 | make_frame = 1; | |
3298 | } | |
3299 | ||
3300 | if (make_frame) | |
3301 | { | |
3302 | fdata.frameless = 0; | |
de6a76fd | 3303 | fdata.lr_offset = tdep->lr_frame_offset; |
e10b1c4c | 3304 | } |
61a65099 | 3305 | } |
e10b1c4c DJ |
3306 | |
3307 | if (!fdata.frameless) | |
3308 | /* Frameless really means stackless. */ | |
3309 | cache->base = read_memory_addr (cache->base, wordsize); | |
3310 | ||
3e8c568d UW |
3311 | trad_frame_set_value (cache->saved_regs, |
3312 | gdbarch_sp_regnum (current_gdbarch), cache->base); | |
61a65099 KB |
3313 | |
3314 | /* if != -1, fdata.saved_fpr is the smallest number of saved_fpr. | |
3315 | All fpr's from saved_fpr to fp31 are saved. */ | |
3316 | ||
3317 | if (fdata.saved_fpr >= 0) | |
3318 | { | |
3319 | int i; | |
3320 | CORE_ADDR fpr_addr = cache->base + fdata.fpr_offset; | |
383f0f5b JB |
3321 | |
3322 | /* If skip_prologue says floating-point registers were saved, | |
3323 | but the current architecture has no floating-point registers, | |
3324 | then that's strange. But we have no indices to even record | |
3325 | the addresses under, so we just ignore it. */ | |
3326 | if (ppc_floating_point_unit_p (gdbarch)) | |
063715bf | 3327 | for (i = fdata.saved_fpr; i < ppc_num_fprs; i++) |
383f0f5b JB |
3328 | { |
3329 | cache->saved_regs[tdep->ppc_fp0_regnum + i].addr = fpr_addr; | |
3330 | fpr_addr += 8; | |
3331 | } | |
61a65099 KB |
3332 | } |
3333 | ||
3334 | /* if != -1, fdata.saved_gpr is the smallest number of saved_gpr. | |
3335 | All gpr's from saved_gpr to gpr31 are saved. */ | |
3336 | ||
3337 | if (fdata.saved_gpr >= 0) | |
3338 | { | |
3339 | int i; | |
3340 | CORE_ADDR gpr_addr = cache->base + fdata.gpr_offset; | |
063715bf | 3341 | for (i = fdata.saved_gpr; i < ppc_num_gprs; i++) |
61a65099 KB |
3342 | { |
3343 | cache->saved_regs[tdep->ppc_gp0_regnum + i].addr = gpr_addr; | |
3344 | gpr_addr += wordsize; | |
3345 | } | |
3346 | } | |
3347 | ||
3348 | /* if != -1, fdata.saved_vr is the smallest number of saved_vr. | |
3349 | All vr's from saved_vr to vr31 are saved. */ | |
3350 | if (tdep->ppc_vr0_regnum != -1 && tdep->ppc_vrsave_regnum != -1) | |
3351 | { | |
3352 | if (fdata.saved_vr >= 0) | |
3353 | { | |
3354 | int i; | |
3355 | CORE_ADDR vr_addr = cache->base + fdata.vr_offset; | |
3356 | for (i = fdata.saved_vr; i < 32; i++) | |
3357 | { | |
3358 | cache->saved_regs[tdep->ppc_vr0_regnum + i].addr = vr_addr; | |
3359 | vr_addr += register_size (gdbarch, tdep->ppc_vr0_regnum); | |
3360 | } | |
3361 | } | |
3362 | } | |
3363 | ||
3364 | /* if != -1, fdata.saved_ev is the smallest number of saved_ev. | |
3365 | All vr's from saved_ev to ev31 are saved. ????? */ | |
3366 | if (tdep->ppc_ev0_regnum != -1 && tdep->ppc_ev31_regnum != -1) | |
3367 | { | |
3368 | if (fdata.saved_ev >= 0) | |
3369 | { | |
3370 | int i; | |
3371 | CORE_ADDR ev_addr = cache->base + fdata.ev_offset; | |
063715bf | 3372 | for (i = fdata.saved_ev; i < ppc_num_gprs; i++) |
61a65099 KB |
3373 | { |
3374 | cache->saved_regs[tdep->ppc_ev0_regnum + i].addr = ev_addr; | |
3375 | cache->saved_regs[tdep->ppc_gp0_regnum + i].addr = ev_addr + 4; | |
3376 | ev_addr += register_size (gdbarch, tdep->ppc_ev0_regnum); | |
3377 | } | |
3378 | } | |
3379 | } | |
3380 | ||
3381 | /* If != 0, fdata.cr_offset is the offset from the frame that | |
3382 | holds the CR. */ | |
3383 | if (fdata.cr_offset != 0) | |
3384 | cache->saved_regs[tdep->ppc_cr_regnum].addr = cache->base + fdata.cr_offset; | |
3385 | ||
3386 | /* If != 0, fdata.lr_offset is the offset from the frame that | |
3387 | holds the LR. */ | |
3388 | if (fdata.lr_offset != 0) | |
3389 | cache->saved_regs[tdep->ppc_lr_regnum].addr = cache->base + fdata.lr_offset; | |
3390 | /* The PC is found in the link register. */ | |
3e8c568d UW |
3391 | cache->saved_regs[gdbarch_pc_regnum (current_gdbarch)] = |
3392 | cache->saved_regs[tdep->ppc_lr_regnum]; | |
61a65099 KB |
3393 | |
3394 | /* If != 0, fdata.vrsave_offset is the offset from the frame that | |
3395 | holds the VRSAVE. */ | |
3396 | if (fdata.vrsave_offset != 0) | |
3397 | cache->saved_regs[tdep->ppc_vrsave_regnum].addr = cache->base + fdata.vrsave_offset; | |
3398 | ||
3399 | if (fdata.alloca_reg < 0) | |
3400 | /* If no alloca register used, then fi->frame is the value of the | |
3401 | %sp for this frame, and it is good enough. */ | |
3e8c568d UW |
3402 | cache->initial_sp = frame_unwind_register_unsigned |
3403 | (next_frame, gdbarch_sp_regnum (current_gdbarch)); | |
61a65099 KB |
3404 | else |
3405 | cache->initial_sp = frame_unwind_register_unsigned (next_frame, | |
3406 | fdata.alloca_reg); | |
3407 | ||
3408 | return cache; | |
3409 | } | |
3410 | ||
3411 | static void | |
3412 | rs6000_frame_this_id (struct frame_info *next_frame, void **this_cache, | |
3413 | struct frame_id *this_id) | |
3414 | { | |
3415 | struct rs6000_frame_cache *info = rs6000_frame_cache (next_frame, | |
3416 | this_cache); | |
93d42b30 DJ |
3417 | (*this_id) = frame_id_build (info->base, |
3418 | frame_func_unwind (next_frame, NORMAL_FRAME)); | |
61a65099 KB |
3419 | } |
3420 | ||
3421 | static void | |
3422 | rs6000_frame_prev_register (struct frame_info *next_frame, | |
3423 | void **this_cache, | |
3424 | int regnum, int *optimizedp, | |
3425 | enum lval_type *lvalp, CORE_ADDR *addrp, | |
50fd1280 | 3426 | int *realnump, gdb_byte *valuep) |
61a65099 KB |
3427 | { |
3428 | struct rs6000_frame_cache *info = rs6000_frame_cache (next_frame, | |
3429 | this_cache); | |
1f67027d AC |
3430 | trad_frame_get_prev_register (next_frame, info->saved_regs, regnum, |
3431 | optimizedp, lvalp, addrp, realnump, valuep); | |
61a65099 KB |
3432 | } |
3433 | ||
3434 | static const struct frame_unwind rs6000_frame_unwind = | |
3435 | { | |
3436 | NORMAL_FRAME, | |
3437 | rs6000_frame_this_id, | |
3438 | rs6000_frame_prev_register | |
3439 | }; | |
3440 | ||
3441 | static const struct frame_unwind * | |
3442 | rs6000_frame_sniffer (struct frame_info *next_frame) | |
3443 | { | |
3444 | return &rs6000_frame_unwind; | |
3445 | } | |
3446 | ||
3447 | \f | |
3448 | ||
3449 | static CORE_ADDR | |
3450 | rs6000_frame_base_address (struct frame_info *next_frame, | |
3451 | void **this_cache) | |
3452 | { | |
3453 | struct rs6000_frame_cache *info = rs6000_frame_cache (next_frame, | |
3454 | this_cache); | |
3455 | return info->initial_sp; | |
3456 | } | |
3457 | ||
3458 | static const struct frame_base rs6000_frame_base = { | |
3459 | &rs6000_frame_unwind, | |
3460 | rs6000_frame_base_address, | |
3461 | rs6000_frame_base_address, | |
3462 | rs6000_frame_base_address | |
3463 | }; | |
3464 | ||
3465 | static const struct frame_base * | |
3466 | rs6000_frame_base_sniffer (struct frame_info *next_frame) | |
3467 | { | |
3468 | return &rs6000_frame_base; | |
3469 | } | |
3470 | ||
7a78ae4e ND |
3471 | /* Initialize the current architecture based on INFO. If possible, re-use an |
3472 | architecture from ARCHES, which is a list of architectures already created | |
3473 | during this debugging session. | |
c906108c | 3474 | |
7a78ae4e | 3475 | Called e.g. at program startup, when reading a core file, and when reading |
64366f1c | 3476 | a binary file. */ |
c906108c | 3477 | |
7a78ae4e ND |
3478 | static struct gdbarch * |
3479 | rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) | |
3480 | { | |
3481 | struct gdbarch *gdbarch; | |
3482 | struct gdbarch_tdep *tdep; | |
708ff411 | 3483 | int wordsize, from_xcoff_exec, from_elf_exec, i, off; |
7a78ae4e ND |
3484 | struct reg *regs; |
3485 | const struct variant *v; | |
3486 | enum bfd_architecture arch; | |
3487 | unsigned long mach; | |
3488 | bfd abfd; | |
7b112f9c | 3489 | int sysv_abi; |
5bf1c677 | 3490 | asection *sect; |
7a78ae4e | 3491 | |
9aa1e687 | 3492 | from_xcoff_exec = info.abfd && info.abfd->format == bfd_object && |
7a78ae4e ND |
3493 | bfd_get_flavour (info.abfd) == bfd_target_xcoff_flavour; |
3494 | ||
9aa1e687 KB |
3495 | from_elf_exec = info.abfd && info.abfd->format == bfd_object && |
3496 | bfd_get_flavour (info.abfd) == bfd_target_elf_flavour; | |
3497 | ||
3498 | sysv_abi = info.abfd && bfd_get_flavour (info.abfd) == bfd_target_elf_flavour; | |
3499 | ||
e712c1cf | 3500 | /* Check word size. If INFO is from a binary file, infer it from |
64366f1c | 3501 | that, else choose a likely default. */ |
9aa1e687 | 3502 | if (from_xcoff_exec) |
c906108c | 3503 | { |
11ed25ac | 3504 | if (bfd_xcoff_is_xcoff64 (info.abfd)) |
7a78ae4e ND |
3505 | wordsize = 8; |
3506 | else | |
3507 | wordsize = 4; | |
c906108c | 3508 | } |
9aa1e687 KB |
3509 | else if (from_elf_exec) |
3510 | { | |
3511 | if (elf_elfheader (info.abfd)->e_ident[EI_CLASS] == ELFCLASS64) | |
3512 | wordsize = 8; | |
3513 | else | |
3514 | wordsize = 4; | |
3515 | } | |
c906108c | 3516 | else |
7a78ae4e | 3517 | { |
27b15785 KB |
3518 | if (info.bfd_arch_info != NULL && info.bfd_arch_info->bits_per_word != 0) |
3519 | wordsize = info.bfd_arch_info->bits_per_word / | |
3520 | info.bfd_arch_info->bits_per_byte; | |
3521 | else | |
3522 | wordsize = 4; | |
7a78ae4e | 3523 | } |
c906108c | 3524 | |
13c0b536 | 3525 | /* Find a candidate among extant architectures. */ |
7a78ae4e ND |
3526 | for (arches = gdbarch_list_lookup_by_info (arches, &info); |
3527 | arches != NULL; | |
3528 | arches = gdbarch_list_lookup_by_info (arches->next, &info)) | |
3529 | { | |
3530 | /* Word size in the various PowerPC bfd_arch_info structs isn't | |
3531 | meaningful, because 64-bit CPUs can run in 32-bit mode. So, perform | |
64366f1c | 3532 | separate word size check. */ |
7a78ae4e | 3533 | tdep = gdbarch_tdep (arches->gdbarch); |
4be87837 | 3534 | if (tdep && tdep->wordsize == wordsize) |
7a78ae4e ND |
3535 | return arches->gdbarch; |
3536 | } | |
c906108c | 3537 | |
7a78ae4e ND |
3538 | /* None found, create a new architecture from INFO, whose bfd_arch_info |
3539 | validity depends on the source: | |
3540 | - executable useless | |
3541 | - rs6000_host_arch() good | |
3542 | - core file good | |
3543 | - "set arch" trust blindly | |
3544 | - GDB startup useless but harmless */ | |
c906108c | 3545 | |
9aa1e687 | 3546 | if (!from_xcoff_exec) |
c906108c | 3547 | { |
b732d07d | 3548 | arch = info.bfd_arch_info->arch; |
7a78ae4e | 3549 | mach = info.bfd_arch_info->mach; |
c906108c | 3550 | } |
7a78ae4e | 3551 | else |
c906108c | 3552 | { |
7a78ae4e | 3553 | arch = bfd_arch_powerpc; |
35cec841 | 3554 | bfd_default_set_arch_mach (&abfd, arch, 0); |
7a78ae4e | 3555 | info.bfd_arch_info = bfd_get_arch_info (&abfd); |
35cec841 | 3556 | mach = info.bfd_arch_info->mach; |
7a78ae4e | 3557 | } |
794ac428 | 3558 | tdep = XCALLOC (1, struct gdbarch_tdep); |
7a78ae4e | 3559 | tdep->wordsize = wordsize; |
5bf1c677 EZ |
3560 | |
3561 | /* For e500 executables, the apuinfo section is of help here. Such | |
3562 | section contains the identifier and revision number of each | |
3563 | Application-specific Processing Unit that is present on the | |
3564 | chip. The content of the section is determined by the assembler | |
3565 | which looks at each instruction and determines which unit (and | |
3566 | which version of it) can execute it. In our case we just look for | |
3567 | the existance of the section. */ | |
3568 | ||
3569 | if (info.abfd) | |
3570 | { | |
3571 | sect = bfd_get_section_by_name (info.abfd, ".PPC.EMB.apuinfo"); | |
3572 | if (sect) | |
3573 | { | |
3574 | arch = info.bfd_arch_info->arch; | |
3575 | mach = bfd_mach_ppc_e500; | |
3576 | bfd_default_set_arch_mach (&abfd, arch, mach); | |
3577 | info.bfd_arch_info = bfd_get_arch_info (&abfd); | |
3578 | } | |
3579 | } | |
3580 | ||
7a78ae4e | 3581 | gdbarch = gdbarch_alloc (&info, tdep); |
7a78ae4e | 3582 | |
489461e2 EZ |
3583 | /* Initialize the number of real and pseudo registers in each variant. */ |
3584 | init_variants (); | |
3585 | ||
64366f1c | 3586 | /* Choose variant. */ |
7a78ae4e ND |
3587 | v = find_variant_by_arch (arch, mach); |
3588 | if (!v) | |
dd47e6fd EZ |
3589 | return NULL; |
3590 | ||
7a78ae4e ND |
3591 | tdep->regs = v->regs; |
3592 | ||
2188cbdd | 3593 | tdep->ppc_gp0_regnum = 0; |
2188cbdd EZ |
3594 | tdep->ppc_toc_regnum = 2; |
3595 | tdep->ppc_ps_regnum = 65; | |
3596 | tdep->ppc_cr_regnum = 66; | |
3597 | tdep->ppc_lr_regnum = 67; | |
3598 | tdep->ppc_ctr_regnum = 68; | |
3599 | tdep->ppc_xer_regnum = 69; | |
3600 | if (v->mach == bfd_mach_ppc_601) | |
3601 | tdep->ppc_mq_regnum = 124; | |
708ff411 | 3602 | else if (arch == bfd_arch_rs6000) |
2188cbdd | 3603 | tdep->ppc_mq_regnum = 70; |
e3f36dbd KB |
3604 | else |
3605 | tdep->ppc_mq_regnum = -1; | |
366f009f | 3606 | tdep->ppc_fp0_regnum = 32; |
708ff411 | 3607 | tdep->ppc_fpscr_regnum = (arch == bfd_arch_rs6000) ? 71 : 70; |
f86a7158 | 3608 | tdep->ppc_sr0_regnum = 71; |
baffbae0 JB |
3609 | tdep->ppc_vr0_regnum = -1; |
3610 | tdep->ppc_vrsave_regnum = -1; | |
6ced10dd | 3611 | tdep->ppc_ev0_upper_regnum = -1; |
baffbae0 JB |
3612 | tdep->ppc_ev0_regnum = -1; |
3613 | tdep->ppc_ev31_regnum = -1; | |
867e2dc5 JB |
3614 | tdep->ppc_acc_regnum = -1; |
3615 | tdep->ppc_spefscr_regnum = -1; | |
2188cbdd | 3616 | |
c8001721 EZ |
3617 | set_gdbarch_pc_regnum (gdbarch, 64); |
3618 | set_gdbarch_sp_regnum (gdbarch, 1); | |
0ba6dca9 | 3619 | set_gdbarch_deprecated_fp_regnum (gdbarch, 1); |
6f7f3f0d | 3620 | set_gdbarch_fp0_regnum (gdbarch, 32); |
9f643768 | 3621 | set_gdbarch_register_sim_regno (gdbarch, rs6000_register_sim_regno); |
afd48b75 | 3622 | if (sysv_abi && wordsize == 8) |
05580c65 | 3623 | set_gdbarch_return_value (gdbarch, ppc64_sysv_abi_return_value); |
e754ae69 | 3624 | else if (sysv_abi && wordsize == 4) |
05580c65 | 3625 | set_gdbarch_return_value (gdbarch, ppc_sysv_abi_return_value); |
afd48b75 | 3626 | else |
d217aaed | 3627 | set_gdbarch_return_value (gdbarch, rs6000_return_value); |
c8001721 | 3628 | |
baffbae0 JB |
3629 | /* Set lr_frame_offset. */ |
3630 | if (wordsize == 8) | |
3631 | tdep->lr_frame_offset = 16; | |
3632 | else if (sysv_abi) | |
3633 | tdep->lr_frame_offset = 4; | |
3634 | else | |
3635 | tdep->lr_frame_offset = 8; | |
3636 | ||
f86a7158 JB |
3637 | if (v->arch == bfd_arch_rs6000) |
3638 | tdep->ppc_sr0_regnum = -1; | |
3639 | else if (v->arch == bfd_arch_powerpc) | |
1fcc0bb8 EZ |
3640 | switch (v->mach) |
3641 | { | |
3642 | case bfd_mach_ppc: | |
412b3060 | 3643 | tdep->ppc_sr0_regnum = -1; |
1fcc0bb8 EZ |
3644 | tdep->ppc_vr0_regnum = 71; |
3645 | tdep->ppc_vrsave_regnum = 104; | |
3646 | break; | |
3647 | case bfd_mach_ppc_7400: | |
3648 | tdep->ppc_vr0_regnum = 119; | |
54c2a1e6 | 3649 | tdep->ppc_vrsave_regnum = 152; |
c8001721 EZ |
3650 | break; |
3651 | case bfd_mach_ppc_e500: | |
c8001721 | 3652 | tdep->ppc_toc_regnum = -1; |
6ced10dd JB |
3653 | tdep->ppc_ev0_upper_regnum = 32; |
3654 | tdep->ppc_ev0_regnum = 73; | |
3655 | tdep->ppc_ev31_regnum = 104; | |
3656 | tdep->ppc_acc_regnum = 71; | |
3657 | tdep->ppc_spefscr_regnum = 72; | |
383f0f5b JB |
3658 | tdep->ppc_fp0_regnum = -1; |
3659 | tdep->ppc_fpscr_regnum = -1; | |
f86a7158 | 3660 | tdep->ppc_sr0_regnum = -1; |
c8001721 EZ |
3661 | set_gdbarch_pseudo_register_read (gdbarch, e500_pseudo_register_read); |
3662 | set_gdbarch_pseudo_register_write (gdbarch, e500_pseudo_register_write); | |
6ced10dd | 3663 | set_gdbarch_register_reggroup_p (gdbarch, e500_register_reggroup_p); |
1fcc0bb8 | 3664 | break; |
f86a7158 JB |
3665 | |
3666 | case bfd_mach_ppc64: | |
3667 | case bfd_mach_ppc_620: | |
3668 | case bfd_mach_ppc_630: | |
3669 | case bfd_mach_ppc_a35: | |
3670 | case bfd_mach_ppc_rs64ii: | |
3671 | case bfd_mach_ppc_rs64iii: | |
3672 | /* These processor's register sets don't have segment registers. */ | |
3673 | tdep->ppc_sr0_regnum = -1; | |
3674 | break; | |
1fcc0bb8 | 3675 | } |
f86a7158 JB |
3676 | else |
3677 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 AC |
3678 | _("rs6000_gdbarch_init: " |
3679 | "received unexpected BFD 'arch' value")); | |
1fcc0bb8 | 3680 | |
e0d24f8d WZ |
3681 | set_gdbarch_have_nonsteppable_watchpoint (gdbarch, 1); |
3682 | ||
338ef23d AC |
3683 | /* Sanity check on registers. */ |
3684 | gdb_assert (strcmp (tdep->regs[tdep->ppc_gp0_regnum].name, "r0") == 0); | |
3685 | ||
56a6dfb9 | 3686 | /* Select instruction printer. */ |
708ff411 | 3687 | if (arch == bfd_arch_rs6000) |
9364a0ef | 3688 | set_gdbarch_print_insn (gdbarch, print_insn_rs6000); |
56a6dfb9 | 3689 | else |
9364a0ef | 3690 | set_gdbarch_print_insn (gdbarch, gdb_print_insn_powerpc); |
7495d1dc | 3691 | |
7a78ae4e | 3692 | set_gdbarch_num_regs (gdbarch, v->nregs); |
c8001721 | 3693 | set_gdbarch_num_pseudo_regs (gdbarch, v->npregs); |
7a78ae4e | 3694 | set_gdbarch_register_name (gdbarch, rs6000_register_name); |
691d145a | 3695 | set_gdbarch_register_type (gdbarch, rs6000_register_type); |
c44ca51c | 3696 | set_gdbarch_register_reggroup_p (gdbarch, rs6000_register_reggroup_p); |
7a78ae4e ND |
3697 | |
3698 | set_gdbarch_ptr_bit (gdbarch, wordsize * TARGET_CHAR_BIT); | |
3699 | set_gdbarch_short_bit (gdbarch, 2 * TARGET_CHAR_BIT); | |
3700 | set_gdbarch_int_bit (gdbarch, 4 * TARGET_CHAR_BIT); | |
3701 | set_gdbarch_long_bit (gdbarch, wordsize * TARGET_CHAR_BIT); | |
3702 | set_gdbarch_long_long_bit (gdbarch, 8 * TARGET_CHAR_BIT); | |
3703 | set_gdbarch_float_bit (gdbarch, 4 * TARGET_CHAR_BIT); | |
3704 | set_gdbarch_double_bit (gdbarch, 8 * TARGET_CHAR_BIT); | |
ab9fe00e KB |
3705 | if (sysv_abi) |
3706 | set_gdbarch_long_double_bit (gdbarch, 16 * TARGET_CHAR_BIT); | |
3707 | else | |
3708 | set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT); | |
4e409299 | 3709 | set_gdbarch_char_signed (gdbarch, 0); |
7a78ae4e | 3710 | |
11269d7e | 3711 | set_gdbarch_frame_align (gdbarch, rs6000_frame_align); |
8b148df9 AC |
3712 | if (sysv_abi && wordsize == 8) |
3713 | /* PPC64 SYSV. */ | |
3714 | set_gdbarch_frame_red_zone_size (gdbarch, 288); | |
3715 | else if (!sysv_abi && wordsize == 4) | |
5bffac25 AC |
3716 | /* PowerOpen / AIX 32 bit. The saved area or red zone consists of |
3717 | 19 4 byte GPRS + 18 8 byte FPRs giving a total of 220 bytes. | |
3718 | Problem is, 220 isn't frame (16 byte) aligned. Round it up to | |
3719 | 224. */ | |
3720 | set_gdbarch_frame_red_zone_size (gdbarch, 224); | |
7a78ae4e | 3721 | |
691d145a JB |
3722 | set_gdbarch_convert_register_p (gdbarch, rs6000_convert_register_p); |
3723 | set_gdbarch_register_to_value (gdbarch, rs6000_register_to_value); | |
3724 | set_gdbarch_value_to_register (gdbarch, rs6000_value_to_register); | |
3725 | ||
18ed0c4e JB |
3726 | set_gdbarch_stab_reg_to_regnum (gdbarch, rs6000_stab_reg_to_regnum); |
3727 | set_gdbarch_dwarf2_reg_to_regnum (gdbarch, rs6000_dwarf2_reg_to_regnum); | |
d217aaed | 3728 | |
2ea5f656 | 3729 | if (sysv_abi && wordsize == 4) |
77b2b6d4 | 3730 | set_gdbarch_push_dummy_call (gdbarch, ppc_sysv_abi_push_dummy_call); |
8be9034a AC |
3731 | else if (sysv_abi && wordsize == 8) |
3732 | set_gdbarch_push_dummy_call (gdbarch, ppc64_sysv_abi_push_dummy_call); | |
9aa1e687 | 3733 | else |
77b2b6d4 | 3734 | set_gdbarch_push_dummy_call (gdbarch, rs6000_push_dummy_call); |
7a78ae4e | 3735 | |
7a78ae4e | 3736 | set_gdbarch_skip_prologue (gdbarch, rs6000_skip_prologue); |
0d1243d9 PG |
3737 | set_gdbarch_in_function_epilogue_p (gdbarch, rs6000_in_function_epilogue_p); |
3738 | ||
7a78ae4e | 3739 | set_gdbarch_inner_than (gdbarch, core_addr_lessthan); |
7a78ae4e ND |
3740 | set_gdbarch_breakpoint_from_pc (gdbarch, rs6000_breakpoint_from_pc); |
3741 | ||
ce5eab59 UW |
3742 | /* Handles single stepping of atomic sequences. */ |
3743 | set_gdbarch_software_single_step (gdbarch, deal_with_atomic_sequence); | |
3744 | ||
6066c3de AC |
3745 | /* Handle the 64-bit SVR4 minimal-symbol convention of using "FN" |
3746 | for the descriptor and ".FN" for the entry-point -- a user | |
3747 | specifying "break FN" will unexpectedly end up with a breakpoint | |
3748 | on the descriptor and not the function. This architecture method | |
3749 | transforms any breakpoints on descriptors into breakpoints on the | |
3750 | corresponding entry point. */ | |
3751 | if (sysv_abi && wordsize == 8) | |
3752 | set_gdbarch_adjust_breakpoint_address (gdbarch, ppc64_sysv_abi_adjust_breakpoint_address); | |
3753 | ||
7a78ae4e ND |
3754 | /* Not sure on this. FIXMEmgo */ |
3755 | set_gdbarch_frame_args_skip (gdbarch, 8); | |
3756 | ||
15813d3f AC |
3757 | if (!sysv_abi) |
3758 | { | |
3759 | /* Handle RS/6000 function pointers (which are really function | |
3760 | descriptors). */ | |
f517ea4e PS |
3761 | set_gdbarch_convert_from_func_ptr_addr (gdbarch, |
3762 | rs6000_convert_from_func_ptr_addr); | |
9aa1e687 | 3763 | } |
7a78ae4e | 3764 | |
143985b7 AF |
3765 | /* Helpers for function argument information. */ |
3766 | set_gdbarch_fetch_pointer_argument (gdbarch, rs6000_fetch_pointer_argument); | |
3767 | ||
6f7f3f0d UW |
3768 | /* Trampoline. */ |
3769 | set_gdbarch_in_solib_return_trampoline | |
3770 | (gdbarch, rs6000_in_solib_return_trampoline); | |
3771 | set_gdbarch_skip_trampoline_code (gdbarch, rs6000_skip_trampoline_code); | |
3772 | ||
4fc771b8 DJ |
3773 | /* Hook in the DWARF CFI frame unwinder. */ |
3774 | frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer); | |
3775 | dwarf2_frame_set_adjust_regnum (gdbarch, rs6000_adjust_frame_regnum); | |
3776 | ||
7b112f9c | 3777 | /* Hook in ABI-specific overrides, if they have been registered. */ |
4be87837 | 3778 | gdbarch_init_osabi (info, gdbarch); |
7b112f9c | 3779 | |
61a65099 KB |
3780 | switch (info.osabi) |
3781 | { | |
f5aecab8 PG |
3782 | case GDB_OSABI_LINUX: |
3783 | /* FIXME: pgilliam/2005-10-21: Assume all PowerPC 64-bit linux systems | |
3784 | have altivec registers. If not, ptrace will fail the first time it's | |
3785 | called to access one and will not be called again. This wart will | |
3786 | be removed when Daniel Jacobowitz's proposal for autodetecting target | |
3787 | registers is implemented. */ | |
3788 | if ((v->arch == bfd_arch_powerpc) && ((v->mach)== bfd_mach_ppc64)) | |
3789 | { | |
3790 | tdep->ppc_vr0_regnum = 71; | |
3791 | tdep->ppc_vrsave_regnum = 104; | |
3792 | } | |
3793 | /* Fall Thru */ | |
61a65099 KB |
3794 | case GDB_OSABI_NETBSD_AOUT: |
3795 | case GDB_OSABI_NETBSD_ELF: | |
3796 | case GDB_OSABI_UNKNOWN: | |
61a65099 KB |
3797 | set_gdbarch_unwind_pc (gdbarch, rs6000_unwind_pc); |
3798 | frame_unwind_append_sniffer (gdbarch, rs6000_frame_sniffer); | |
3799 | set_gdbarch_unwind_dummy_id (gdbarch, rs6000_unwind_dummy_id); | |
3800 | frame_base_append_sniffer (gdbarch, rs6000_frame_base_sniffer); | |
3801 | break; | |
3802 | default: | |
61a65099 | 3803 | set_gdbarch_believe_pcc_promotion (gdbarch, 1); |
81332287 KB |
3804 | |
3805 | set_gdbarch_unwind_pc (gdbarch, rs6000_unwind_pc); | |
3806 | frame_unwind_append_sniffer (gdbarch, rs6000_frame_sniffer); | |
3807 | set_gdbarch_unwind_dummy_id (gdbarch, rs6000_unwind_dummy_id); | |
3808 | frame_base_append_sniffer (gdbarch, rs6000_frame_base_sniffer); | |
61a65099 KB |
3809 | } |
3810 | ||
9f643768 JB |
3811 | init_sim_regno_table (gdbarch); |
3812 | ||
7a78ae4e | 3813 | return gdbarch; |
c906108c SS |
3814 | } |
3815 | ||
7b112f9c JT |
3816 | static void |
3817 | rs6000_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file) | |
3818 | { | |
3819 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); | |
3820 | ||
3821 | if (tdep == NULL) | |
3822 | return; | |
3823 | ||
4be87837 | 3824 | /* FIXME: Dump gdbarch_tdep. */ |
7b112f9c JT |
3825 | } |
3826 | ||
c906108c SS |
3827 | /* Initialization code. */ |
3828 | ||
a78f21af | 3829 | extern initialize_file_ftype _initialize_rs6000_tdep; /* -Wmissing-prototypes */ |
b9362cc7 | 3830 | |
c906108c | 3831 | void |
fba45db2 | 3832 | _initialize_rs6000_tdep (void) |
c906108c | 3833 | { |
7b112f9c JT |
3834 | gdbarch_register (bfd_arch_rs6000, rs6000_gdbarch_init, rs6000_dump_tdep); |
3835 | gdbarch_register (bfd_arch_powerpc, rs6000_gdbarch_init, rs6000_dump_tdep); | |
c906108c | 3836 | } |