Commit | Line | Data |
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1f82754b JB |
1 | /* Native support code for PPC AIX, for GDB the GNU debugger. |
2 | ||
ecd75fc8 | 3 | Copyright (C) 2006-2014 Free Software Foundation, Inc. |
1f82754b JB |
4 | |
5 | Free Software Foundation, Inc. | |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
1f82754b JB |
12 | (at your option) any later version. |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
1f82754b JB |
21 | |
22 | #include "defs.h" | |
0e9f083f | 23 | #include <string.h> |
1f82754b | 24 | #include "osabi.h" |
7a61a01c UW |
25 | #include "regcache.h" |
26 | #include "regset.h" | |
4a7622d1 UW |
27 | #include "gdbtypes.h" |
28 | #include "gdbcore.h" | |
29 | #include "target.h" | |
30 | #include "value.h" | |
31 | #include "infcall.h" | |
32 | #include "objfiles.h" | |
33 | #include "breakpoint.h" | |
1f82754b | 34 | #include "rs6000-tdep.h" |
6f7f3f0d | 35 | #include "ppc-tdep.h" |
356a5233 | 36 | #include "rs6000-aix-tdep.h" |
2971b56b | 37 | #include "exceptions.h" |
d5367fe1 | 38 | #include "xcoffread.h" |
4d1eb6b4 JB |
39 | #include "solib.h" |
40 | #include "solib-aix.h" | |
356a5233 | 41 | #include "xml-utils.h" |
4a7622d1 UW |
42 | |
43 | /* If the kernel has to deliver a signal, it pushes a sigcontext | |
44 | structure on the stack and then calls the signal handler, passing | |
0df8b418 | 45 | the address of the sigcontext in an argument register. Usually |
4a7622d1 UW |
46 | the signal handler doesn't save this register, so we have to |
47 | access the sigcontext structure via an offset from the signal handler | |
48 | frame. | |
49 | The following constants were determined by experimentation on AIX 3.2. */ | |
50 | #define SIG_FRAME_PC_OFFSET 96 | |
51 | #define SIG_FRAME_LR_OFFSET 108 | |
52 | #define SIG_FRAME_FP_OFFSET 284 | |
53 | ||
7a61a01c UW |
54 | |
55 | /* Core file support. */ | |
56 | ||
57 | static struct ppc_reg_offsets rs6000_aix32_reg_offsets = | |
58 | { | |
59 | /* General-purpose registers. */ | |
60 | 208, /* r0_offset */ | |
f2db237a AM |
61 | 4, /* gpr_size */ |
62 | 4, /* xr_size */ | |
7a61a01c UW |
63 | 24, /* pc_offset */ |
64 | 28, /* ps_offset */ | |
65 | 32, /* cr_offset */ | |
66 | 36, /* lr_offset */ | |
67 | 40, /* ctr_offset */ | |
68 | 44, /* xer_offset */ | |
69 | 48, /* mq_offset */ | |
70 | ||
71 | /* Floating-point registers. */ | |
72 | 336, /* f0_offset */ | |
73 | 56, /* fpscr_offset */ | |
f2db237a | 74 | 4, /* fpscr_size */ |
7a61a01c UW |
75 | |
76 | /* AltiVec registers. */ | |
77 | -1, /* vr0_offset */ | |
78 | -1, /* vscr_offset */ | |
79 | -1 /* vrsave_offset */ | |
80 | }; | |
81 | ||
82 | static struct ppc_reg_offsets rs6000_aix64_reg_offsets = | |
83 | { | |
84 | /* General-purpose registers. */ | |
85 | 0, /* r0_offset */ | |
f2db237a AM |
86 | 8, /* gpr_size */ |
87 | 4, /* xr_size */ | |
7a61a01c UW |
88 | 264, /* pc_offset */ |
89 | 256, /* ps_offset */ | |
90 | 288, /* cr_offset */ | |
91 | 272, /* lr_offset */ | |
92 | 280, /* ctr_offset */ | |
93 | 292, /* xer_offset */ | |
94 | -1, /* mq_offset */ | |
95 | ||
96 | /* Floating-point registers. */ | |
97 | 312, /* f0_offset */ | |
98 | 296, /* fpscr_offset */ | |
f2db237a | 99 | 4, /* fpscr_size */ |
7a61a01c UW |
100 | |
101 | /* AltiVec registers. */ | |
102 | -1, /* vr0_offset */ | |
103 | -1, /* vscr_offset */ | |
104 | -1 /* vrsave_offset */ | |
105 | }; | |
106 | ||
107 | ||
108 | /* Supply register REGNUM in the general-purpose register set REGSET | |
109 | from the buffer specified by GREGS and LEN to register cache | |
110 | REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ | |
111 | ||
112 | static void | |
113 | rs6000_aix_supply_regset (const struct regset *regset, | |
114 | struct regcache *regcache, int regnum, | |
115 | const void *gregs, size_t len) | |
116 | { | |
117 | ppc_supply_gregset (regset, regcache, regnum, gregs, len); | |
f2db237a | 118 | ppc_supply_fpregset (regset, regcache, regnum, gregs, len); |
7a61a01c UW |
119 | } |
120 | ||
121 | /* Collect register REGNUM in the general-purpose register set | |
0df8b418 | 122 | REGSET, from register cache REGCACHE into the buffer specified by |
7a61a01c UW |
123 | GREGS and LEN. If REGNUM is -1, do this for all registers in |
124 | REGSET. */ | |
125 | ||
126 | static void | |
127 | rs6000_aix_collect_regset (const struct regset *regset, | |
128 | const struct regcache *regcache, int regnum, | |
129 | void *gregs, size_t len) | |
130 | { | |
131 | ppc_collect_gregset (regset, regcache, regnum, gregs, len); | |
f2db237a | 132 | ppc_collect_fpregset (regset, regcache, regnum, gregs, len); |
7a61a01c UW |
133 | } |
134 | ||
135 | /* AIX register set. */ | |
136 | ||
3ca7dae4 | 137 | static const struct regset rs6000_aix32_regset = |
7a61a01c UW |
138 | { |
139 | &rs6000_aix32_reg_offsets, | |
140 | rs6000_aix_supply_regset, | |
141 | rs6000_aix_collect_regset, | |
142 | }; | |
143 | ||
3ca7dae4 | 144 | static const struct regset rs6000_aix64_regset = |
7a61a01c UW |
145 | { |
146 | &rs6000_aix64_reg_offsets, | |
147 | rs6000_aix_supply_regset, | |
148 | rs6000_aix_collect_regset, | |
149 | }; | |
150 | ||
151 | /* Return the appropriate register set for the core section identified | |
152 | by SECT_NAME and SECT_SIZE. */ | |
153 | ||
154 | static const struct regset * | |
155 | rs6000_aix_regset_from_core_section (struct gdbarch *gdbarch, | |
156 | const char *sect_name, size_t sect_size) | |
157 | { | |
158 | if (gdbarch_tdep (gdbarch)->wordsize == 4) | |
159 | { | |
160 | if (strcmp (sect_name, ".reg") == 0 && sect_size >= 592) | |
161 | return &rs6000_aix32_regset; | |
162 | } | |
163 | else | |
164 | { | |
165 | if (strcmp (sect_name, ".reg") == 0 && sect_size >= 576) | |
166 | return &rs6000_aix64_regset; | |
167 | } | |
168 | ||
169 | return NULL; | |
170 | } | |
171 | ||
172 | ||
0df8b418 | 173 | /* Pass the arguments in either registers, or in the stack. In RS/6000, |
4a7622d1 UW |
174 | the first eight words of the argument list (that might be less than |
175 | eight parameters if some parameters occupy more than one word) are | |
0df8b418 | 176 | passed in r3..r10 registers. Float and double parameters are |
4a7622d1 UW |
177 | passed in fpr's, in addition to that. Rest of the parameters if any |
178 | are passed in user stack. There might be cases in which half of the | |
179 | parameter is copied into registers, the other half is pushed into | |
180 | stack. | |
181 | ||
182 | Stack must be aligned on 64-bit boundaries when synthesizing | |
183 | function calls. | |
184 | ||
185 | If the function is returning a structure, then the return address is passed | |
186 | in r3, then the first 7 words of the parameters can be passed in registers, | |
187 | starting from r4. */ | |
188 | ||
189 | static CORE_ADDR | |
190 | rs6000_push_dummy_call (struct gdbarch *gdbarch, struct value *function, | |
191 | struct regcache *regcache, CORE_ADDR bp_addr, | |
192 | int nargs, struct value **args, CORE_ADDR sp, | |
193 | int struct_return, CORE_ADDR struct_addr) | |
194 | { | |
195 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
e17a4113 | 196 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
4a7622d1 UW |
197 | int ii; |
198 | int len = 0; | |
199 | int argno; /* current argument number */ | |
200 | int argbytes; /* current argument byte */ | |
201 | gdb_byte tmp_buffer[50]; | |
202 | int f_argno = 0; /* current floating point argno */ | |
203 | int wordsize = gdbarch_tdep (gdbarch)->wordsize; | |
204 | CORE_ADDR func_addr = find_function_addr (function, NULL); | |
205 | ||
206 | struct value *arg = 0; | |
207 | struct type *type; | |
208 | ||
209 | ULONGEST saved_sp; | |
210 | ||
211 | /* The calling convention this function implements assumes the | |
212 | processor has floating-point registers. We shouldn't be using it | |
213 | on PPC variants that lack them. */ | |
214 | gdb_assert (ppc_floating_point_unit_p (gdbarch)); | |
215 | ||
216 | /* The first eight words of ther arguments are passed in registers. | |
217 | Copy them appropriately. */ | |
218 | ii = 0; | |
219 | ||
220 | /* If the function is returning a `struct', then the first word | |
221 | (which will be passed in r3) is used for struct return address. | |
222 | In that case we should advance one word and start from r4 | |
223 | register to copy parameters. */ | |
224 | if (struct_return) | |
225 | { | |
226 | regcache_raw_write_unsigned (regcache, tdep->ppc_gp0_regnum + 3, | |
227 | struct_addr); | |
228 | ii++; | |
229 | } | |
230 | ||
0df8b418 | 231 | /* effectively indirect call... gcc does... |
4a7622d1 UW |
232 | |
233 | return_val example( float, int); | |
234 | ||
235 | eabi: | |
236 | float in fp0, int in r3 | |
237 | offset of stack on overflow 8/16 | |
238 | for varargs, must go by type. | |
239 | power open: | |
240 | float in r3&r4, int in r5 | |
241 | offset of stack on overflow different | |
242 | both: | |
243 | return in r3 or f0. If no float, must study how gcc emulates floats; | |
0df8b418 | 244 | pay attention to arg promotion. |
4a7622d1 | 245 | User may have to cast\args to handle promotion correctly |
0df8b418 | 246 | since gdb won't know if prototype supplied or not. */ |
4a7622d1 UW |
247 | |
248 | for (argno = 0, argbytes = 0; argno < nargs && ii < 8; ++ii) | |
249 | { | |
250 | int reg_size = register_size (gdbarch, ii + 3); | |
251 | ||
252 | arg = args[argno]; | |
253 | type = check_typedef (value_type (arg)); | |
254 | len = TYPE_LENGTH (type); | |
255 | ||
256 | if (TYPE_CODE (type) == TYPE_CODE_FLT) | |
257 | { | |
4a7622d1 | 258 | /* Floating point arguments are passed in fpr's, as well as gpr's. |
0df8b418 | 259 | There are 13 fpr's reserved for passing parameters. At this point |
36d1c68c JB |
260 | there is no way we would run out of them. |
261 | ||
262 | Always store the floating point value using the register's | |
263 | floating-point format. */ | |
264 | const int fp_regnum = tdep->ppc_fp0_regnum + 1 + f_argno; | |
265 | gdb_byte reg_val[MAX_REGISTER_SIZE]; | |
266 | struct type *reg_type = register_type (gdbarch, fp_regnum); | |
4a7622d1 UW |
267 | |
268 | gdb_assert (len <= 8); | |
269 | ||
36d1c68c JB |
270 | convert_typed_floating (value_contents (arg), type, |
271 | reg_val, reg_type); | |
272 | regcache_cooked_write (regcache, fp_regnum, reg_val); | |
4a7622d1 UW |
273 | ++f_argno; |
274 | } | |
275 | ||
276 | if (len > reg_size) | |
277 | { | |
278 | ||
279 | /* Argument takes more than one register. */ | |
280 | while (argbytes < len) | |
281 | { | |
282 | gdb_byte word[MAX_REGISTER_SIZE]; | |
283 | memset (word, 0, reg_size); | |
284 | memcpy (word, | |
285 | ((char *) value_contents (arg)) + argbytes, | |
286 | (len - argbytes) > reg_size | |
287 | ? reg_size : len - argbytes); | |
288 | regcache_cooked_write (regcache, | |
289 | tdep->ppc_gp0_regnum + 3 + ii, | |
290 | word); | |
291 | ++ii, argbytes += reg_size; | |
292 | ||
293 | if (ii >= 8) | |
294 | goto ran_out_of_registers_for_arguments; | |
295 | } | |
296 | argbytes = 0; | |
297 | --ii; | |
298 | } | |
299 | else | |
300 | { | |
301 | /* Argument can fit in one register. No problem. */ | |
302 | int adj = gdbarch_byte_order (gdbarch) | |
303 | == BFD_ENDIAN_BIG ? reg_size - len : 0; | |
304 | gdb_byte word[MAX_REGISTER_SIZE]; | |
305 | ||
306 | memset (word, 0, reg_size); | |
307 | memcpy (word, value_contents (arg), len); | |
308 | regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 3 +ii, word); | |
309 | } | |
310 | ++argno; | |
311 | } | |
312 | ||
313 | ran_out_of_registers_for_arguments: | |
314 | ||
315 | regcache_cooked_read_unsigned (regcache, | |
316 | gdbarch_sp_regnum (gdbarch), | |
317 | &saved_sp); | |
318 | ||
319 | /* Location for 8 parameters are always reserved. */ | |
320 | sp -= wordsize * 8; | |
321 | ||
322 | /* Another six words for back chain, TOC register, link register, etc. */ | |
323 | sp -= wordsize * 6; | |
324 | ||
325 | /* Stack pointer must be quadword aligned. */ | |
326 | sp &= -16; | |
327 | ||
328 | /* If there are more arguments, allocate space for them in | |
329 | the stack, then push them starting from the ninth one. */ | |
330 | ||
331 | if ((argno < nargs) || argbytes) | |
332 | { | |
333 | int space = 0, jj; | |
334 | ||
335 | if (argbytes) | |
336 | { | |
337 | space += ((len - argbytes + 3) & -4); | |
338 | jj = argno + 1; | |
339 | } | |
340 | else | |
341 | jj = argno; | |
342 | ||
343 | for (; jj < nargs; ++jj) | |
344 | { | |
345 | struct value *val = args[jj]; | |
346 | space += ((TYPE_LENGTH (value_type (val))) + 3) & -4; | |
347 | } | |
348 | ||
349 | /* Add location required for the rest of the parameters. */ | |
350 | space = (space + 15) & -16; | |
351 | sp -= space; | |
352 | ||
353 | /* This is another instance we need to be concerned about | |
0df8b418 | 354 | securing our stack space. If we write anything underneath %sp |
4a7622d1 UW |
355 | (r1), we might conflict with the kernel who thinks he is free |
356 | to use this area. So, update %sp first before doing anything | |
357 | else. */ | |
358 | ||
359 | regcache_raw_write_signed (regcache, | |
360 | gdbarch_sp_regnum (gdbarch), sp); | |
361 | ||
362 | /* If the last argument copied into the registers didn't fit there | |
363 | completely, push the rest of it into stack. */ | |
364 | ||
365 | if (argbytes) | |
366 | { | |
367 | write_memory (sp + 24 + (ii * 4), | |
368 | value_contents (arg) + argbytes, | |
369 | len - argbytes); | |
370 | ++argno; | |
371 | ii += ((len - argbytes + 3) & -4) / 4; | |
372 | } | |
373 | ||
374 | /* Push the rest of the arguments into stack. */ | |
375 | for (; argno < nargs; ++argno) | |
376 | { | |
377 | ||
378 | arg = args[argno]; | |
379 | type = check_typedef (value_type (arg)); | |
380 | len = TYPE_LENGTH (type); | |
381 | ||
382 | ||
383 | /* Float types should be passed in fpr's, as well as in the | |
384 | stack. */ | |
385 | if (TYPE_CODE (type) == TYPE_CODE_FLT && f_argno < 13) | |
386 | { | |
387 | ||
388 | gdb_assert (len <= 8); | |
389 | ||
390 | regcache_cooked_write (regcache, | |
391 | tdep->ppc_fp0_regnum + 1 + f_argno, | |
392 | value_contents (arg)); | |
393 | ++f_argno; | |
394 | } | |
395 | ||
396 | write_memory (sp + 24 + (ii * 4), value_contents (arg), len); | |
397 | ii += ((len + 3) & -4) / 4; | |
398 | } | |
399 | } | |
400 | ||
401 | /* Set the stack pointer. According to the ABI, the SP is meant to | |
402 | be set _before_ the corresponding stack space is used. On AIX, | |
403 | this even applies when the target has been completely stopped! | |
404 | Not doing this can lead to conflicts with the kernel which thinks | |
405 | that it still has control over this not-yet-allocated stack | |
406 | region. */ | |
407 | regcache_raw_write_signed (regcache, gdbarch_sp_regnum (gdbarch), sp); | |
408 | ||
409 | /* Set back chain properly. */ | |
e17a4113 | 410 | store_unsigned_integer (tmp_buffer, wordsize, byte_order, saved_sp); |
4a7622d1 UW |
411 | write_memory (sp, tmp_buffer, wordsize); |
412 | ||
413 | /* Point the inferior function call's return address at the dummy's | |
414 | breakpoint. */ | |
415 | regcache_raw_write_signed (regcache, tdep->ppc_lr_regnum, bp_addr); | |
416 | ||
4d1eb6b4 JB |
417 | /* Set the TOC register value. */ |
418 | regcache_raw_write_signed (regcache, tdep->ppc_toc_regnum, | |
419 | solib_aix_get_toc_value (func_addr)); | |
4a7622d1 UW |
420 | |
421 | target_store_registers (regcache, -1); | |
422 | return sp; | |
423 | } | |
424 | ||
425 | static enum return_value_convention | |
6a3a010b | 426 | rs6000_return_value (struct gdbarch *gdbarch, struct value *function, |
4a7622d1 UW |
427 | struct type *valtype, struct regcache *regcache, |
428 | gdb_byte *readbuf, const gdb_byte *writebuf) | |
429 | { | |
430 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
e17a4113 | 431 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
4a7622d1 UW |
432 | |
433 | /* The calling convention this function implements assumes the | |
434 | processor has floating-point registers. We shouldn't be using it | |
435 | on PowerPC variants that lack them. */ | |
436 | gdb_assert (ppc_floating_point_unit_p (gdbarch)); | |
437 | ||
438 | /* AltiVec extension: Functions that declare a vector data type as a | |
439 | return value place that return value in VR2. */ | |
440 | if (TYPE_CODE (valtype) == TYPE_CODE_ARRAY && TYPE_VECTOR (valtype) | |
441 | && TYPE_LENGTH (valtype) == 16) | |
442 | { | |
443 | if (readbuf) | |
444 | regcache_cooked_read (regcache, tdep->ppc_vr0_regnum + 2, readbuf); | |
445 | if (writebuf) | |
446 | regcache_cooked_write (regcache, tdep->ppc_vr0_regnum + 2, writebuf); | |
447 | ||
448 | return RETURN_VALUE_REGISTER_CONVENTION; | |
449 | } | |
450 | ||
451 | /* If the called subprogram returns an aggregate, there exists an | |
452 | implicit first argument, whose value is the address of a caller- | |
453 | allocated buffer into which the callee is assumed to store its | |
0df8b418 | 454 | return value. All explicit parameters are appropriately |
4a7622d1 UW |
455 | relabeled. */ |
456 | if (TYPE_CODE (valtype) == TYPE_CODE_STRUCT | |
457 | || TYPE_CODE (valtype) == TYPE_CODE_UNION | |
458 | || TYPE_CODE (valtype) == TYPE_CODE_ARRAY) | |
459 | return RETURN_VALUE_STRUCT_CONVENTION; | |
460 | ||
461 | /* Scalar floating-point values are returned in FPR1 for float or | |
462 | double, and in FPR1:FPR2 for quadword precision. Fortran | |
463 | complex*8 and complex*16 are returned in FPR1:FPR2, and | |
464 | complex*32 is returned in FPR1:FPR4. */ | |
465 | if (TYPE_CODE (valtype) == TYPE_CODE_FLT | |
466 | && (TYPE_LENGTH (valtype) == 4 || TYPE_LENGTH (valtype) == 8)) | |
467 | { | |
468 | struct type *regtype = register_type (gdbarch, tdep->ppc_fp0_regnum); | |
469 | gdb_byte regval[8]; | |
470 | ||
471 | /* FIXME: kettenis/2007-01-01: Add support for quadword | |
472 | precision and complex. */ | |
473 | ||
474 | if (readbuf) | |
475 | { | |
476 | regcache_cooked_read (regcache, tdep->ppc_fp0_regnum + 1, regval); | |
477 | convert_typed_floating (regval, regtype, readbuf, valtype); | |
478 | } | |
479 | if (writebuf) | |
480 | { | |
481 | convert_typed_floating (writebuf, valtype, regval, regtype); | |
482 | regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + 1, regval); | |
483 | } | |
484 | ||
485 | return RETURN_VALUE_REGISTER_CONVENTION; | |
486 | } | |
487 | ||
488 | /* Values of the types int, long, short, pointer, and char (length | |
489 | is less than or equal to four bytes), as well as bit values of | |
490 | lengths less than or equal to 32 bits, must be returned right | |
491 | justified in GPR3 with signed values sign extended and unsigned | |
492 | values zero extended, as necessary. */ | |
493 | if (TYPE_LENGTH (valtype) <= tdep->wordsize) | |
494 | { | |
495 | if (readbuf) | |
496 | { | |
497 | ULONGEST regval; | |
498 | ||
499 | /* For reading we don't have to worry about sign extension. */ | |
500 | regcache_cooked_read_unsigned (regcache, tdep->ppc_gp0_regnum + 3, | |
501 | ®val); | |
e17a4113 UW |
502 | store_unsigned_integer (readbuf, TYPE_LENGTH (valtype), byte_order, |
503 | regval); | |
4a7622d1 UW |
504 | } |
505 | if (writebuf) | |
506 | { | |
507 | /* For writing, use unpack_long since that should handle any | |
508 | required sign extension. */ | |
509 | regcache_cooked_write_unsigned (regcache, tdep->ppc_gp0_regnum + 3, | |
510 | unpack_long (valtype, writebuf)); | |
511 | } | |
512 | ||
513 | return RETURN_VALUE_REGISTER_CONVENTION; | |
514 | } | |
515 | ||
516 | /* Eight-byte non-floating-point scalar values must be returned in | |
517 | GPR3:GPR4. */ | |
518 | ||
519 | if (TYPE_LENGTH (valtype) == 8) | |
520 | { | |
521 | gdb_assert (TYPE_CODE (valtype) != TYPE_CODE_FLT); | |
522 | gdb_assert (tdep->wordsize == 4); | |
523 | ||
524 | if (readbuf) | |
525 | { | |
526 | gdb_byte regval[8]; | |
527 | ||
528 | regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 3, regval); | |
529 | regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 4, | |
530 | regval + 4); | |
531 | memcpy (readbuf, regval, 8); | |
532 | } | |
533 | if (writebuf) | |
534 | { | |
535 | regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 3, writebuf); | |
536 | regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 4, | |
537 | writebuf + 4); | |
538 | } | |
539 | ||
540 | return RETURN_VALUE_REGISTER_CONVENTION; | |
541 | } | |
542 | ||
543 | return RETURN_VALUE_STRUCT_CONVENTION; | |
544 | } | |
545 | ||
546 | /* Support for CONVERT_FROM_FUNC_PTR_ADDR (ARCH, ADDR, TARG). | |
547 | ||
548 | Usually a function pointer's representation is simply the address | |
0df8b418 MS |
549 | of the function. On the RS/6000 however, a function pointer is |
550 | represented by a pointer to an OPD entry. This OPD entry contains | |
4a7622d1 UW |
551 | three words, the first word is the address of the function, the |
552 | second word is the TOC pointer (r2), and the third word is the | |
553 | static chain value. Throughout GDB it is currently assumed that a | |
554 | function pointer contains the address of the function, which is not | |
555 | easy to fix. In addition, the conversion of a function address to | |
556 | a function pointer would require allocation of an OPD entry in the | |
557 | inferior's memory space, with all its drawbacks. To be able to | |
558 | call C++ virtual methods in the inferior (which are called via | |
559 | function pointers), find_function_addr uses this function to get the | |
560 | function address from a function pointer. */ | |
561 | ||
562 | /* Return real function address if ADDR (a function pointer) is in the data | |
563 | space and is therefore a special function pointer. */ | |
564 | ||
565 | static CORE_ADDR | |
566 | rs6000_convert_from_func_ptr_addr (struct gdbarch *gdbarch, | |
567 | CORE_ADDR addr, | |
568 | struct target_ops *targ) | |
569 | { | |
e17a4113 UW |
570 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
571 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
4a7622d1 UW |
572 | struct obj_section *s; |
573 | ||
574 | s = find_pc_section (addr); | |
4a7622d1 | 575 | |
40adab56 JB |
576 | /* Normally, functions live inside a section that is executable. |
577 | So, if ADDR points to a non-executable section, then treat it | |
578 | as a function descriptor and return the target address iff | |
579 | the target address itself points to a section that is executable. */ | |
580 | if (s && (s->the_bfd_section->flags & SEC_CODE) == 0) | |
581 | { | |
57174f31 | 582 | CORE_ADDR pc = 0; |
2971b56b | 583 | struct obj_section *pc_section; |
bfd189b1 | 584 | volatile struct gdb_exception e; |
2971b56b JB |
585 | |
586 | TRY_CATCH (e, RETURN_MASK_ERROR) | |
587 | { | |
588 | pc = read_memory_unsigned_integer (addr, tdep->wordsize, byte_order); | |
589 | } | |
590 | if (e.reason < 0) | |
591 | { | |
592 | /* An error occured during reading. Probably a memory error | |
593 | due to the section not being loaded yet. This address | |
594 | cannot be a function descriptor. */ | |
595 | return addr; | |
596 | } | |
597 | pc_section = find_pc_section (pc); | |
40adab56 JB |
598 | |
599 | if (pc_section && (pc_section->the_bfd_section->flags & SEC_CODE)) | |
600 | return pc; | |
601 | } | |
602 | ||
603 | return addr; | |
4a7622d1 UW |
604 | } |
605 | ||
606 | ||
607 | /* Calculate the destination of a branch/jump. Return -1 if not a branch. */ | |
608 | ||
609 | static CORE_ADDR | |
610 | branch_dest (struct frame_info *frame, int opcode, int instr, | |
611 | CORE_ADDR pc, CORE_ADDR safety) | |
612 | { | |
e17a4113 UW |
613 | struct gdbarch *gdbarch = get_frame_arch (frame); |
614 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
615 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
4a7622d1 UW |
616 | CORE_ADDR dest; |
617 | int immediate; | |
618 | int absolute; | |
619 | int ext_op; | |
620 | ||
621 | absolute = (int) ((instr >> 1) & 1); | |
622 | ||
623 | switch (opcode) | |
624 | { | |
625 | case 18: | |
626 | immediate = ((instr & ~3) << 6) >> 6; /* br unconditional */ | |
627 | if (absolute) | |
628 | dest = immediate; | |
629 | else | |
630 | dest = pc + immediate; | |
631 | break; | |
632 | ||
633 | case 16: | |
634 | immediate = ((instr & ~3) << 16) >> 16; /* br conditional */ | |
635 | if (absolute) | |
636 | dest = immediate; | |
637 | else | |
638 | dest = pc + immediate; | |
639 | break; | |
640 | ||
641 | case 19: | |
642 | ext_op = (instr >> 1) & 0x3ff; | |
643 | ||
644 | if (ext_op == 16) /* br conditional register */ | |
645 | { | |
646 | dest = get_frame_register_unsigned (frame, tdep->ppc_lr_regnum) & ~3; | |
647 | ||
648 | /* If we are about to return from a signal handler, dest is | |
649 | something like 0x3c90. The current frame is a signal handler | |
650 | caller frame, upon completion of the sigreturn system call | |
651 | execution will return to the saved PC in the frame. */ | |
652 | if (dest < AIX_TEXT_SEGMENT_BASE) | |
653 | dest = read_memory_unsigned_integer | |
654 | (get_frame_base (frame) + SIG_FRAME_PC_OFFSET, | |
e17a4113 | 655 | tdep->wordsize, byte_order); |
4a7622d1 UW |
656 | } |
657 | ||
658 | else if (ext_op == 528) /* br cond to count reg */ | |
659 | { | |
0df8b418 MS |
660 | dest = get_frame_register_unsigned (frame, |
661 | tdep->ppc_ctr_regnum) & ~3; | |
4a7622d1 UW |
662 | |
663 | /* If we are about to execute a system call, dest is something | |
664 | like 0x22fc or 0x3b00. Upon completion the system call | |
665 | will return to the address in the link register. */ | |
666 | if (dest < AIX_TEXT_SEGMENT_BASE) | |
0df8b418 MS |
667 | dest = get_frame_register_unsigned (frame, |
668 | tdep->ppc_lr_regnum) & ~3; | |
4a7622d1 UW |
669 | } |
670 | else | |
671 | return -1; | |
672 | break; | |
673 | ||
674 | default: | |
675 | return -1; | |
676 | } | |
677 | return (dest < AIX_TEXT_SEGMENT_BASE) ? safety : dest; | |
678 | } | |
679 | ||
680 | /* AIX does not support PT_STEP. Simulate it. */ | |
681 | ||
682 | static int | |
683 | rs6000_software_single_step (struct frame_info *frame) | |
684 | { | |
a6d9a66e | 685 | struct gdbarch *gdbarch = get_frame_arch (frame); |
6c95b8df | 686 | struct address_space *aspace = get_frame_address_space (frame); |
e17a4113 | 687 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
4a7622d1 UW |
688 | int ii, insn; |
689 | CORE_ADDR loc; | |
690 | CORE_ADDR breaks[2]; | |
691 | int opcode; | |
692 | ||
693 | loc = get_frame_pc (frame); | |
694 | ||
e17a4113 | 695 | insn = read_memory_integer (loc, 4, byte_order); |
4a7622d1 UW |
696 | |
697 | if (ppc_deal_with_atomic_sequence (frame)) | |
698 | return 1; | |
699 | ||
700 | breaks[0] = loc + PPC_INSN_SIZE; | |
701 | opcode = insn >> 26; | |
702 | breaks[1] = branch_dest (frame, opcode, insn, loc, breaks[0]); | |
703 | ||
0df8b418 | 704 | /* Don't put two breakpoints on the same address. */ |
4a7622d1 UW |
705 | if (breaks[1] == breaks[0]) |
706 | breaks[1] = -1; | |
707 | ||
708 | for (ii = 0; ii < 2; ++ii) | |
709 | { | |
0df8b418 | 710 | /* ignore invalid breakpoint. */ |
4a7622d1 UW |
711 | if (breaks[ii] == -1) |
712 | continue; | |
6c95b8df | 713 | insert_single_step_breakpoint (gdbarch, aspace, breaks[ii]); |
4a7622d1 UW |
714 | } |
715 | ||
0df8b418 | 716 | errno = 0; /* FIXME, don't ignore errors! */ |
4a7622d1 UW |
717 | /* What errors? {read,write}_memory call error(). */ |
718 | return 1; | |
719 | } | |
720 | ||
38a69d0a JB |
721 | /* Implement the "auto_wide_charset" gdbarch method for this platform. */ |
722 | ||
723 | static const char * | |
724 | rs6000_aix_auto_wide_charset (void) | |
725 | { | |
726 | return "UTF-16"; | |
727 | } | |
728 | ||
beb4b03c JB |
729 | /* Implement an osabi sniffer for RS6000/AIX. |
730 | ||
731 | This function assumes that ABFD's flavour is XCOFF. In other words, | |
732 | it should be registered as a sniffer for bfd_target_xcoff_flavour | |
733 | objfiles only. A failed assertion will be raised if this condition | |
734 | is not met. */ | |
735 | ||
1f82754b JB |
736 | static enum gdb_osabi |
737 | rs6000_aix_osabi_sniffer (bfd *abfd) | |
738 | { | |
beb4b03c | 739 | gdb_assert (bfd_get_flavour (abfd) == bfd_target_xcoff_flavour); |
1f82754b | 740 | |
d5367fe1 JB |
741 | /* The only noticeable difference between Lynx178 XCOFF files and |
742 | AIX XCOFF files comes from the fact that there are no shared | |
743 | libraries on Lynx178. On AIX, we are betting that an executable | |
744 | linked with no shared library will never exist. */ | |
745 | if (xcoff_get_n_import_files (abfd) <= 0) | |
746 | return GDB_OSABI_UNKNOWN; | |
747 | ||
beb4b03c | 748 | return GDB_OSABI_AIX; |
1f82754b JB |
749 | } |
750 | ||
356a5233 JB |
751 | /* A structure encoding the offset and size of a field within |
752 | a struct. */ | |
753 | ||
754 | struct field_info | |
755 | { | |
756 | int offset; | |
757 | int size; | |
758 | }; | |
759 | ||
760 | /* A structure describing the layout of all the fields of interest | |
761 | in AIX's struct ld_info. Each field in this struct corresponds | |
762 | to the field of the same name in struct ld_info. */ | |
763 | ||
764 | struct ld_info_desc | |
765 | { | |
766 | struct field_info ldinfo_next; | |
767 | struct field_info ldinfo_fd; | |
768 | struct field_info ldinfo_textorg; | |
769 | struct field_info ldinfo_textsize; | |
770 | struct field_info ldinfo_dataorg; | |
771 | struct field_info ldinfo_datasize; | |
772 | struct field_info ldinfo_filename; | |
773 | }; | |
774 | ||
775 | /* The following data has been generated by compiling and running | |
776 | the following program on AIX 5.3. */ | |
777 | ||
778 | #if 0 | |
1c432e72 JB |
779 | #include <stddef.h> |
780 | #include <stdio.h> | |
781 | #define __LDINFO_PTRACE32__ | |
782 | #define __LDINFO_PTRACE64__ | |
783 | #include <sys/ldr.h> | |
784 | ||
785 | #define pinfo(type,member) \ | |
786 | { \ | |
787 | struct type ldi = {0}; \ | |
788 | \ | |
789 | printf (" {%d, %d},\t/* %s */\n", \ | |
790 | offsetof (struct type, member), \ | |
791 | sizeof (ldi.member), \ | |
792 | #member); \ | |
793 | } \ | |
794 | while (0) | |
795 | ||
796 | int | |
797 | main (void) | |
798 | { | |
799 | printf ("static const struct ld_info_desc ld_info32_desc =\n{\n"); | |
800 | pinfo (__ld_info32, ldinfo_next); | |
801 | pinfo (__ld_info32, ldinfo_fd); | |
802 | pinfo (__ld_info32, ldinfo_textorg); | |
803 | pinfo (__ld_info32, ldinfo_textsize); | |
804 | pinfo (__ld_info32, ldinfo_dataorg); | |
805 | pinfo (__ld_info32, ldinfo_datasize); | |
806 | pinfo (__ld_info32, ldinfo_filename); | |
807 | printf ("};\n"); | |
808 | ||
809 | printf ("\n"); | |
810 | ||
811 | printf ("static const struct ld_info_desc ld_info64_desc =\n{\n"); | |
812 | pinfo (__ld_info64, ldinfo_next); | |
813 | pinfo (__ld_info64, ldinfo_fd); | |
814 | pinfo (__ld_info64, ldinfo_textorg); | |
815 | pinfo (__ld_info64, ldinfo_textsize); | |
816 | pinfo (__ld_info64, ldinfo_dataorg); | |
817 | pinfo (__ld_info64, ldinfo_datasize); | |
818 | pinfo (__ld_info64, ldinfo_filename); | |
819 | printf ("};\n"); | |
820 | ||
821 | return 0; | |
822 | } | |
356a5233 JB |
823 | #endif /* 0 */ |
824 | ||
825 | /* Layout of the 32bit version of struct ld_info. */ | |
826 | ||
827 | static const struct ld_info_desc ld_info32_desc = | |
828 | { | |
829 | {0, 4}, /* ldinfo_next */ | |
830 | {4, 4}, /* ldinfo_fd */ | |
831 | {8, 4}, /* ldinfo_textorg */ | |
832 | {12, 4}, /* ldinfo_textsize */ | |
833 | {16, 4}, /* ldinfo_dataorg */ | |
834 | {20, 4}, /* ldinfo_datasize */ | |
835 | {24, 2}, /* ldinfo_filename */ | |
836 | }; | |
837 | ||
838 | /* Layout of the 64bit version of struct ld_info. */ | |
839 | ||
840 | static const struct ld_info_desc ld_info64_desc = | |
841 | { | |
842 | {0, 4}, /* ldinfo_next */ | |
843 | {8, 4}, /* ldinfo_fd */ | |
844 | {16, 8}, /* ldinfo_textorg */ | |
845 | {24, 8}, /* ldinfo_textsize */ | |
846 | {32, 8}, /* ldinfo_dataorg */ | |
847 | {40, 8}, /* ldinfo_datasize */ | |
848 | {48, 2}, /* ldinfo_filename */ | |
849 | }; | |
850 | ||
851 | /* A structured representation of one entry read from the ld_info | |
852 | binary data provided by the AIX loader. */ | |
853 | ||
854 | struct ld_info | |
855 | { | |
856 | ULONGEST next; | |
857 | int fd; | |
858 | CORE_ADDR textorg; | |
859 | ULONGEST textsize; | |
860 | CORE_ADDR dataorg; | |
861 | ULONGEST datasize; | |
862 | char *filename; | |
863 | char *member_name; | |
864 | }; | |
865 | ||
866 | /* Return a struct ld_info object corresponding to the entry at | |
867 | LDI_BUF. | |
868 | ||
869 | Note that the filename and member_name strings still point | |
870 | to the data in LDI_BUF. So LDI_BUF must not be deallocated | |
871 | while the struct ld_info object returned is in use. */ | |
872 | ||
873 | static struct ld_info | |
874 | rs6000_aix_extract_ld_info (struct gdbarch *gdbarch, | |
875 | const gdb_byte *ldi_buf) | |
876 | { | |
877 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
878 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
879 | struct type *ptr_type = builtin_type (gdbarch)->builtin_data_ptr; | |
880 | const struct ld_info_desc desc | |
881 | = tdep->wordsize == 8 ? ld_info64_desc : ld_info32_desc; | |
882 | struct ld_info info; | |
883 | ||
884 | info.next = extract_unsigned_integer (ldi_buf + desc.ldinfo_next.offset, | |
885 | desc.ldinfo_next.size, | |
886 | byte_order); | |
887 | info.fd = extract_signed_integer (ldi_buf + desc.ldinfo_fd.offset, | |
888 | desc.ldinfo_fd.size, | |
889 | byte_order); | |
890 | info.textorg = extract_typed_address (ldi_buf + desc.ldinfo_textorg.offset, | |
891 | ptr_type); | |
892 | info.textsize | |
893 | = extract_unsigned_integer (ldi_buf + desc.ldinfo_textsize.offset, | |
894 | desc.ldinfo_textsize.size, | |
895 | byte_order); | |
896 | info.dataorg = extract_typed_address (ldi_buf + desc.ldinfo_dataorg.offset, | |
897 | ptr_type); | |
898 | info.datasize | |
899 | = extract_unsigned_integer (ldi_buf + desc.ldinfo_datasize.offset, | |
900 | desc.ldinfo_datasize.size, | |
901 | byte_order); | |
902 | info.filename = (char *) ldi_buf + desc.ldinfo_filename.offset; | |
903 | info.member_name = info.filename + strlen (info.filename) + 1; | |
904 | ||
905 | return info; | |
906 | } | |
907 | ||
908 | /* Append to OBJSTACK an XML string description of the shared library | |
909 | corresponding to LDI, following the TARGET_OBJECT_LIBRARIES_AIX | |
910 | format. */ | |
911 | ||
912 | static void | |
913 | rs6000_aix_shared_library_to_xml (struct ld_info *ldi, | |
914 | struct obstack *obstack) | |
915 | { | |
916 | char *p; | |
917 | ||
918 | obstack_grow_str (obstack, "<library name=\""); | |
919 | p = xml_escape_text (ldi->filename); | |
920 | obstack_grow_str (obstack, p); | |
921 | xfree (p); | |
922 | obstack_grow_str (obstack, "\""); | |
923 | ||
924 | if (ldi->member_name[0] != '\0') | |
925 | { | |
926 | obstack_grow_str (obstack, " member=\""); | |
927 | p = xml_escape_text (ldi->member_name); | |
928 | obstack_grow_str (obstack, p); | |
929 | xfree (p); | |
930 | obstack_grow_str (obstack, "\""); | |
931 | } | |
932 | ||
933 | obstack_grow_str (obstack, " text_addr=\""); | |
934 | obstack_grow_str (obstack, core_addr_to_string (ldi->textorg)); | |
935 | obstack_grow_str (obstack, "\""); | |
936 | ||
937 | obstack_grow_str (obstack, " text_size=\""); | |
938 | obstack_grow_str (obstack, pulongest (ldi->textsize)); | |
939 | obstack_grow_str (obstack, "\""); | |
940 | ||
941 | obstack_grow_str (obstack, " data_addr=\""); | |
942 | obstack_grow_str (obstack, core_addr_to_string (ldi->dataorg)); | |
943 | obstack_grow_str (obstack, "\""); | |
944 | ||
945 | obstack_grow_str (obstack, " data_size=\""); | |
946 | obstack_grow_str (obstack, pulongest (ldi->datasize)); | |
947 | obstack_grow_str (obstack, "\""); | |
948 | ||
949 | obstack_grow_str (obstack, "></library>"); | |
950 | } | |
951 | ||
952 | /* Convert the ld_info binary data provided by the AIX loader into | |
953 | an XML representation following the TARGET_OBJECT_LIBRARIES_AIX | |
954 | format. | |
955 | ||
956 | LDI_BUF is a buffer containing the ld_info data. | |
957 | READBUF, OFFSET and LEN follow the same semantics as target_ops' | |
958 | to_xfer_partial target_ops method. | |
959 | ||
960 | If CLOSE_LDINFO_FD is nonzero, then this routine also closes | |
961 | the ldinfo_fd file descriptor. This is useful when the ldinfo | |
962 | data is obtained via ptrace, as ptrace opens a file descriptor | |
963 | for each and every entry; but we cannot use this descriptor | |
964 | as the consumer of the XML library list might live in a different | |
965 | process. */ | |
966 | ||
c09f20e4 | 967 | ULONGEST |
356a5233 | 968 | rs6000_aix_ld_info_to_xml (struct gdbarch *gdbarch, const gdb_byte *ldi_buf, |
b55e14c7 | 969 | gdb_byte *readbuf, ULONGEST offset, ULONGEST len, |
356a5233 JB |
970 | int close_ldinfo_fd) |
971 | { | |
972 | struct obstack obstack; | |
973 | const char *buf; | |
c09f20e4 | 974 | ULONGEST len_avail; |
356a5233 JB |
975 | |
976 | obstack_init (&obstack); | |
977 | obstack_grow_str (&obstack, "<library-list-aix version=\"1.0\">\n"); | |
978 | ||
979 | while (1) | |
980 | { | |
981 | struct ld_info ldi = rs6000_aix_extract_ld_info (gdbarch, ldi_buf); | |
982 | ||
983 | rs6000_aix_shared_library_to_xml (&ldi, &obstack); | |
984 | if (close_ldinfo_fd) | |
985 | close (ldi.fd); | |
986 | ||
987 | if (!ldi.next) | |
988 | break; | |
989 | ldi_buf = ldi_buf + ldi.next; | |
990 | } | |
991 | ||
992 | obstack_grow_str0 (&obstack, "</library-list-aix>\n"); | |
993 | ||
994 | buf = obstack_finish (&obstack); | |
995 | len_avail = strlen (buf); | |
996 | if (offset >= len_avail) | |
997 | len= 0; | |
998 | else | |
999 | { | |
1000 | if (len > len_avail - offset) | |
1001 | len = len_avail - offset; | |
1002 | memcpy (readbuf, buf + offset, len); | |
1003 | } | |
1004 | ||
1005 | obstack_free (&obstack, NULL); | |
1006 | return len; | |
1007 | } | |
1008 | ||
1009 | /* Implement the core_xfer_shared_libraries_aix gdbarch method. */ | |
1010 | ||
c09f20e4 | 1011 | static ULONGEST |
356a5233 JB |
1012 | rs6000_aix_core_xfer_shared_libraries_aix (struct gdbarch *gdbarch, |
1013 | gdb_byte *readbuf, | |
1014 | ULONGEST offset, | |
7ec1862d | 1015 | ULONGEST len) |
356a5233 JB |
1016 | { |
1017 | struct bfd_section *ldinfo_sec; | |
1018 | int ldinfo_size; | |
1019 | gdb_byte *ldinfo_buf; | |
1020 | struct cleanup *cleanup; | |
1021 | LONGEST result; | |
1022 | ||
1023 | ldinfo_sec = bfd_get_section_by_name (core_bfd, ".ldinfo"); | |
1024 | if (ldinfo_sec == NULL) | |
1025 | error (_("cannot find .ldinfo section from core file: %s"), | |
1026 | bfd_errmsg (bfd_get_error ())); | |
1027 | ldinfo_size = bfd_get_section_size (ldinfo_sec); | |
1028 | ||
1029 | ldinfo_buf = xmalloc (ldinfo_size); | |
1030 | cleanup = make_cleanup (xfree, ldinfo_buf); | |
1031 | ||
1032 | if (! bfd_get_section_contents (core_bfd, ldinfo_sec, | |
1033 | ldinfo_buf, 0, ldinfo_size)) | |
1034 | error (_("unable to read .ldinfo section from core file: %s"), | |
1035 | bfd_errmsg (bfd_get_error ())); | |
1036 | ||
1037 | result = rs6000_aix_ld_info_to_xml (gdbarch, ldinfo_buf, readbuf, | |
1038 | offset, len, 0); | |
1039 | ||
1040 | do_cleanups (cleanup); | |
1041 | return result; | |
1042 | } | |
1043 | ||
1f82754b JB |
1044 | static void |
1045 | rs6000_aix_init_osabi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
1046 | { | |
4a7622d1 UW |
1047 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
1048 | ||
1f82754b JB |
1049 | /* RS6000/AIX does not support PT_STEP. Has to be simulated. */ |
1050 | set_gdbarch_software_single_step (gdbarch, rs6000_software_single_step); | |
6f7f3f0d | 1051 | |
2454a024 UW |
1052 | /* Displaced stepping is currently not supported in combination with |
1053 | software single-stepping. */ | |
1054 | set_gdbarch_displaced_step_copy_insn (gdbarch, NULL); | |
1055 | set_gdbarch_displaced_step_fixup (gdbarch, NULL); | |
1056 | set_gdbarch_displaced_step_free_closure (gdbarch, NULL); | |
1057 | set_gdbarch_displaced_step_location (gdbarch, NULL); | |
1058 | ||
4a7622d1 UW |
1059 | set_gdbarch_push_dummy_call (gdbarch, rs6000_push_dummy_call); |
1060 | set_gdbarch_return_value (gdbarch, rs6000_return_value); | |
1061 | set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT); | |
1062 | ||
1063 | /* Handle RS/6000 function pointers (which are really function | |
1064 | descriptors). */ | |
1065 | set_gdbarch_convert_from_func_ptr_addr | |
1066 | (gdbarch, rs6000_convert_from_func_ptr_addr); | |
1067 | ||
7a61a01c UW |
1068 | /* Core file support. */ |
1069 | set_gdbarch_regset_from_core_section | |
1070 | (gdbarch, rs6000_aix_regset_from_core_section); | |
356a5233 JB |
1071 | set_gdbarch_core_xfer_shared_libraries_aix |
1072 | (gdbarch, rs6000_aix_core_xfer_shared_libraries_aix); | |
7a61a01c | 1073 | |
4a7622d1 UW |
1074 | if (tdep->wordsize == 8) |
1075 | tdep->lr_frame_offset = 16; | |
1076 | else | |
1077 | tdep->lr_frame_offset = 8; | |
1078 | ||
1079 | if (tdep->wordsize == 4) | |
1080 | /* PowerOpen / AIX 32 bit. The saved area or red zone consists of | |
1081 | 19 4 byte GPRS + 18 8 byte FPRs giving a total of 220 bytes. | |
1082 | Problem is, 220 isn't frame (16 byte) aligned. Round it up to | |
1083 | 224. */ | |
1084 | set_gdbarch_frame_red_zone_size (gdbarch, 224); | |
1085 | else | |
1086 | set_gdbarch_frame_red_zone_size (gdbarch, 0); | |
38a69d0a JB |
1087 | |
1088 | set_gdbarch_auto_wide_charset (gdbarch, rs6000_aix_auto_wide_charset); | |
4d1eb6b4 JB |
1089 | |
1090 | set_solib_ops (gdbarch, &solib_aix_so_ops); | |
1f82754b JB |
1091 | } |
1092 | ||
63807e1d PA |
1093 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
1094 | extern initialize_file_ftype _initialize_rs6000_aix_tdep; | |
1095 | ||
1f82754b JB |
1096 | void |
1097 | _initialize_rs6000_aix_tdep (void) | |
1098 | { | |
1099 | gdbarch_register_osabi_sniffer (bfd_arch_rs6000, | |
1100 | bfd_target_xcoff_flavour, | |
1101 | rs6000_aix_osabi_sniffer); | |
7a61a01c UW |
1102 | gdbarch_register_osabi_sniffer (bfd_arch_powerpc, |
1103 | bfd_target_xcoff_flavour, | |
1104 | rs6000_aix_osabi_sniffer); | |
1f82754b JB |
1105 | |
1106 | gdbarch_register_osabi (bfd_arch_rs6000, 0, GDB_OSABI_AIX, | |
1107 | rs6000_aix_init_osabi); | |
7a61a01c UW |
1108 | gdbarch_register_osabi (bfd_arch_powerpc, 0, GDB_OSABI_AIX, |
1109 | rs6000_aix_init_osabi); | |
1f82754b JB |
1110 | } |
1111 |