Commit | Line | Data |
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1f82754b JB |
1 | /* Native support code for PPC AIX, for GDB the GNU debugger. |
2 | ||
e2882c85 | 3 | Copyright (C) 2006-2018 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" | |
23 | #include "osabi.h" | |
7a61a01c UW |
24 | #include "regcache.h" |
25 | #include "regset.h" | |
4a7622d1 UW |
26 | #include "gdbtypes.h" |
27 | #include "gdbcore.h" | |
28 | #include "target.h" | |
29 | #include "value.h" | |
30 | #include "infcall.h" | |
31 | #include "objfiles.h" | |
32 | #include "breakpoint.h" | |
1f82754b | 33 | #include "rs6000-tdep.h" |
6f7f3f0d | 34 | #include "ppc-tdep.h" |
356a5233 | 35 | #include "rs6000-aix-tdep.h" |
d5367fe1 | 36 | #include "xcoffread.h" |
4d1eb6b4 JB |
37 | #include "solib.h" |
38 | #include "solib-aix.h" | |
3b2ca824 | 39 | #include "target-float.h" |
356a5233 | 40 | #include "xml-utils.h" |
4a7622d1 UW |
41 | |
42 | /* If the kernel has to deliver a signal, it pushes a sigcontext | |
43 | structure on the stack and then calls the signal handler, passing | |
0df8b418 | 44 | the address of the sigcontext in an argument register. Usually |
4a7622d1 UW |
45 | the signal handler doesn't save this register, so we have to |
46 | access the sigcontext structure via an offset from the signal handler | |
47 | frame. | |
48 | The following constants were determined by experimentation on AIX 3.2. */ | |
49 | #define SIG_FRAME_PC_OFFSET 96 | |
50 | #define SIG_FRAME_LR_OFFSET 108 | |
51 | #define SIG_FRAME_FP_OFFSET 284 | |
52 | ||
7a61a01c UW |
53 | |
54 | /* Core file support. */ | |
55 | ||
56 | static struct ppc_reg_offsets rs6000_aix32_reg_offsets = | |
57 | { | |
58 | /* General-purpose registers. */ | |
59 | 208, /* r0_offset */ | |
f2db237a AM |
60 | 4, /* gpr_size */ |
61 | 4, /* xr_size */ | |
7a61a01c UW |
62 | 24, /* pc_offset */ |
63 | 28, /* ps_offset */ | |
64 | 32, /* cr_offset */ | |
65 | 36, /* lr_offset */ | |
66 | 40, /* ctr_offset */ | |
67 | 44, /* xer_offset */ | |
68 | 48, /* mq_offset */ | |
69 | ||
70 | /* Floating-point registers. */ | |
71 | 336, /* f0_offset */ | |
72 | 56, /* fpscr_offset */ | |
1d75a658 | 73 | 4 /* fpscr_size */ |
7a61a01c UW |
74 | }; |
75 | ||
76 | static struct ppc_reg_offsets rs6000_aix64_reg_offsets = | |
77 | { | |
78 | /* General-purpose registers. */ | |
79 | 0, /* r0_offset */ | |
f2db237a AM |
80 | 8, /* gpr_size */ |
81 | 4, /* xr_size */ | |
7a61a01c UW |
82 | 264, /* pc_offset */ |
83 | 256, /* ps_offset */ | |
84 | 288, /* cr_offset */ | |
85 | 272, /* lr_offset */ | |
86 | 280, /* ctr_offset */ | |
87 | 292, /* xer_offset */ | |
88 | -1, /* mq_offset */ | |
89 | ||
90 | /* Floating-point registers. */ | |
91 | 312, /* f0_offset */ | |
92 | 296, /* fpscr_offset */ | |
1d75a658 | 93 | 4 /* fpscr_size */ |
7a61a01c UW |
94 | }; |
95 | ||
96 | ||
97 | /* Supply register REGNUM in the general-purpose register set REGSET | |
98 | from the buffer specified by GREGS and LEN to register cache | |
99 | REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */ | |
100 | ||
101 | static void | |
102 | rs6000_aix_supply_regset (const struct regset *regset, | |
103 | struct regcache *regcache, int regnum, | |
104 | const void *gregs, size_t len) | |
105 | { | |
106 | ppc_supply_gregset (regset, regcache, regnum, gregs, len); | |
f2db237a | 107 | ppc_supply_fpregset (regset, regcache, regnum, gregs, len); |
7a61a01c UW |
108 | } |
109 | ||
110 | /* Collect register REGNUM in the general-purpose register set | |
0df8b418 | 111 | REGSET, from register cache REGCACHE into the buffer specified by |
7a61a01c UW |
112 | GREGS and LEN. If REGNUM is -1, do this for all registers in |
113 | REGSET. */ | |
114 | ||
115 | static void | |
116 | rs6000_aix_collect_regset (const struct regset *regset, | |
117 | const struct regcache *regcache, int regnum, | |
118 | void *gregs, size_t len) | |
119 | { | |
120 | ppc_collect_gregset (regset, regcache, regnum, gregs, len); | |
f2db237a | 121 | ppc_collect_fpregset (regset, regcache, regnum, gregs, len); |
7a61a01c UW |
122 | } |
123 | ||
124 | /* AIX register set. */ | |
125 | ||
3ca7dae4 | 126 | static const struct regset rs6000_aix32_regset = |
7a61a01c UW |
127 | { |
128 | &rs6000_aix32_reg_offsets, | |
129 | rs6000_aix_supply_regset, | |
130 | rs6000_aix_collect_regset, | |
131 | }; | |
132 | ||
3ca7dae4 | 133 | static const struct regset rs6000_aix64_regset = |
7a61a01c UW |
134 | { |
135 | &rs6000_aix64_reg_offsets, | |
136 | rs6000_aix_supply_regset, | |
137 | rs6000_aix_collect_regset, | |
138 | }; | |
139 | ||
23ea9aeb | 140 | /* Iterate over core file register note sections. */ |
7a61a01c | 141 | |
23ea9aeb AA |
142 | static void |
143 | rs6000_aix_iterate_over_regset_sections (struct gdbarch *gdbarch, | |
144 | iterate_over_regset_sections_cb *cb, | |
145 | void *cb_data, | |
146 | const struct regcache *regcache) | |
7a61a01c UW |
147 | { |
148 | if (gdbarch_tdep (gdbarch)->wordsize == 4) | |
a616bb94 | 149 | cb (".reg", 592, 592, &rs6000_aix32_regset, NULL, cb_data); |
7a61a01c | 150 | else |
a616bb94 | 151 | cb (".reg", 576, 576, &rs6000_aix64_regset, NULL, cb_data); |
7a61a01c UW |
152 | } |
153 | ||
154 | ||
0df8b418 | 155 | /* Pass the arguments in either registers, or in the stack. In RS/6000, |
4a7622d1 UW |
156 | the first eight words of the argument list (that might be less than |
157 | eight parameters if some parameters occupy more than one word) are | |
0df8b418 | 158 | passed in r3..r10 registers. Float and double parameters are |
4a7622d1 UW |
159 | passed in fpr's, in addition to that. Rest of the parameters if any |
160 | are passed in user stack. There might be cases in which half of the | |
161 | parameter is copied into registers, the other half is pushed into | |
162 | stack. | |
163 | ||
164 | Stack must be aligned on 64-bit boundaries when synthesizing | |
165 | function calls. | |
166 | ||
167 | If the function is returning a structure, then the return address is passed | |
168 | in r3, then the first 7 words of the parameters can be passed in registers, | |
169 | starting from r4. */ | |
170 | ||
171 | static CORE_ADDR | |
172 | rs6000_push_dummy_call (struct gdbarch *gdbarch, struct value *function, | |
173 | struct regcache *regcache, CORE_ADDR bp_addr, | |
174 | int nargs, struct value **args, CORE_ADDR sp, | |
175 | int struct_return, CORE_ADDR struct_addr) | |
176 | { | |
177 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
e17a4113 | 178 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
4a7622d1 UW |
179 | int ii; |
180 | int len = 0; | |
181 | int argno; /* current argument number */ | |
182 | int argbytes; /* current argument byte */ | |
183 | gdb_byte tmp_buffer[50]; | |
184 | int f_argno = 0; /* current floating point argno */ | |
185 | int wordsize = gdbarch_tdep (gdbarch)->wordsize; | |
186 | CORE_ADDR func_addr = find_function_addr (function, NULL); | |
187 | ||
188 | struct value *arg = 0; | |
189 | struct type *type; | |
190 | ||
191 | ULONGEST saved_sp; | |
192 | ||
193 | /* The calling convention this function implements assumes the | |
194 | processor has floating-point registers. We shouldn't be using it | |
195 | on PPC variants that lack them. */ | |
196 | gdb_assert (ppc_floating_point_unit_p (gdbarch)); | |
197 | ||
198 | /* The first eight words of ther arguments are passed in registers. | |
199 | Copy them appropriately. */ | |
200 | ii = 0; | |
201 | ||
202 | /* If the function is returning a `struct', then the first word | |
203 | (which will be passed in r3) is used for struct return address. | |
204 | In that case we should advance one word and start from r4 | |
205 | register to copy parameters. */ | |
206 | if (struct_return) | |
207 | { | |
208 | regcache_raw_write_unsigned (regcache, tdep->ppc_gp0_regnum + 3, | |
209 | struct_addr); | |
210 | ii++; | |
211 | } | |
212 | ||
0df8b418 | 213 | /* effectively indirect call... gcc does... |
4a7622d1 UW |
214 | |
215 | return_val example( float, int); | |
216 | ||
217 | eabi: | |
218 | float in fp0, int in r3 | |
219 | offset of stack on overflow 8/16 | |
220 | for varargs, must go by type. | |
221 | power open: | |
222 | float in r3&r4, int in r5 | |
223 | offset of stack on overflow different | |
224 | both: | |
225 | return in r3 or f0. If no float, must study how gcc emulates floats; | |
0df8b418 | 226 | pay attention to arg promotion. |
4a7622d1 | 227 | User may have to cast\args to handle promotion correctly |
0df8b418 | 228 | since gdb won't know if prototype supplied or not. */ |
4a7622d1 UW |
229 | |
230 | for (argno = 0, argbytes = 0; argno < nargs && ii < 8; ++ii) | |
231 | { | |
232 | int reg_size = register_size (gdbarch, ii + 3); | |
233 | ||
234 | arg = args[argno]; | |
235 | type = check_typedef (value_type (arg)); | |
236 | len = TYPE_LENGTH (type); | |
237 | ||
238 | if (TYPE_CODE (type) == TYPE_CODE_FLT) | |
239 | { | |
4a7622d1 | 240 | /* Floating point arguments are passed in fpr's, as well as gpr's. |
0df8b418 | 241 | There are 13 fpr's reserved for passing parameters. At this point |
36d1c68c JB |
242 | there is no way we would run out of them. |
243 | ||
244 | Always store the floating point value using the register's | |
245 | floating-point format. */ | |
246 | const int fp_regnum = tdep->ppc_fp0_regnum + 1 + f_argno; | |
0f068fb5 | 247 | gdb_byte reg_val[PPC_MAX_REGISTER_SIZE]; |
36d1c68c | 248 | struct type *reg_type = register_type (gdbarch, fp_regnum); |
4a7622d1 UW |
249 | |
250 | gdb_assert (len <= 8); | |
251 | ||
3b2ca824 | 252 | target_float_convert (value_contents (arg), type, reg_val, reg_type); |
b66f5587 | 253 | regcache->cooked_write (fp_regnum, reg_val); |
4a7622d1 UW |
254 | ++f_argno; |
255 | } | |
256 | ||
257 | if (len > reg_size) | |
258 | { | |
259 | ||
260 | /* Argument takes more than one register. */ | |
261 | while (argbytes < len) | |
262 | { | |
0f068fb5 | 263 | gdb_byte word[PPC_MAX_REGISTER_SIZE]; |
4a7622d1 UW |
264 | memset (word, 0, reg_size); |
265 | memcpy (word, | |
266 | ((char *) value_contents (arg)) + argbytes, | |
267 | (len - argbytes) > reg_size | |
268 | ? reg_size : len - argbytes); | |
b66f5587 | 269 | regcache->cooked_write (tdep->ppc_gp0_regnum + 3 + ii, word); |
4a7622d1 UW |
270 | ++ii, argbytes += reg_size; |
271 | ||
272 | if (ii >= 8) | |
273 | goto ran_out_of_registers_for_arguments; | |
274 | } | |
275 | argbytes = 0; | |
276 | --ii; | |
277 | } | |
278 | else | |
279 | { | |
280 | /* Argument can fit in one register. No problem. */ | |
0f068fb5 | 281 | gdb_byte word[PPC_MAX_REGISTER_SIZE]; |
4a7622d1 UW |
282 | |
283 | memset (word, 0, reg_size); | |
284 | memcpy (word, value_contents (arg), len); | |
b66f5587 | 285 | regcache->cooked_write (tdep->ppc_gp0_regnum + 3 +ii, word); |
4a7622d1 UW |
286 | } |
287 | ++argno; | |
288 | } | |
289 | ||
290 | ran_out_of_registers_for_arguments: | |
291 | ||
292 | regcache_cooked_read_unsigned (regcache, | |
293 | gdbarch_sp_regnum (gdbarch), | |
294 | &saved_sp); | |
295 | ||
296 | /* Location for 8 parameters are always reserved. */ | |
297 | sp -= wordsize * 8; | |
298 | ||
299 | /* Another six words for back chain, TOC register, link register, etc. */ | |
300 | sp -= wordsize * 6; | |
301 | ||
302 | /* Stack pointer must be quadword aligned. */ | |
303 | sp &= -16; | |
304 | ||
305 | /* If there are more arguments, allocate space for them in | |
306 | the stack, then push them starting from the ninth one. */ | |
307 | ||
308 | if ((argno < nargs) || argbytes) | |
309 | { | |
310 | int space = 0, jj; | |
311 | ||
312 | if (argbytes) | |
313 | { | |
314 | space += ((len - argbytes + 3) & -4); | |
315 | jj = argno + 1; | |
316 | } | |
317 | else | |
318 | jj = argno; | |
319 | ||
320 | for (; jj < nargs; ++jj) | |
321 | { | |
322 | struct value *val = args[jj]; | |
323 | space += ((TYPE_LENGTH (value_type (val))) + 3) & -4; | |
324 | } | |
325 | ||
326 | /* Add location required for the rest of the parameters. */ | |
327 | space = (space + 15) & -16; | |
328 | sp -= space; | |
329 | ||
330 | /* This is another instance we need to be concerned about | |
0df8b418 | 331 | securing our stack space. If we write anything underneath %sp |
4a7622d1 UW |
332 | (r1), we might conflict with the kernel who thinks he is free |
333 | to use this area. So, update %sp first before doing anything | |
334 | else. */ | |
335 | ||
336 | regcache_raw_write_signed (regcache, | |
337 | gdbarch_sp_regnum (gdbarch), sp); | |
338 | ||
339 | /* If the last argument copied into the registers didn't fit there | |
340 | completely, push the rest of it into stack. */ | |
341 | ||
342 | if (argbytes) | |
343 | { | |
344 | write_memory (sp + 24 + (ii * 4), | |
345 | value_contents (arg) + argbytes, | |
346 | len - argbytes); | |
347 | ++argno; | |
348 | ii += ((len - argbytes + 3) & -4) / 4; | |
349 | } | |
350 | ||
351 | /* Push the rest of the arguments into stack. */ | |
352 | for (; argno < nargs; ++argno) | |
353 | { | |
354 | ||
355 | arg = args[argno]; | |
356 | type = check_typedef (value_type (arg)); | |
357 | len = TYPE_LENGTH (type); | |
358 | ||
359 | ||
360 | /* Float types should be passed in fpr's, as well as in the | |
361 | stack. */ | |
362 | if (TYPE_CODE (type) == TYPE_CODE_FLT && f_argno < 13) | |
363 | { | |
364 | ||
365 | gdb_assert (len <= 8); | |
366 | ||
b66f5587 SM |
367 | regcache->cooked_write (tdep->ppc_fp0_regnum + 1 + f_argno, |
368 | value_contents (arg)); | |
4a7622d1 UW |
369 | ++f_argno; |
370 | } | |
371 | ||
372 | write_memory (sp + 24 + (ii * 4), value_contents (arg), len); | |
373 | ii += ((len + 3) & -4) / 4; | |
374 | } | |
375 | } | |
376 | ||
377 | /* Set the stack pointer. According to the ABI, the SP is meant to | |
378 | be set _before_ the corresponding stack space is used. On AIX, | |
379 | this even applies when the target has been completely stopped! | |
380 | Not doing this can lead to conflicts with the kernel which thinks | |
381 | that it still has control over this not-yet-allocated stack | |
382 | region. */ | |
383 | regcache_raw_write_signed (regcache, gdbarch_sp_regnum (gdbarch), sp); | |
384 | ||
385 | /* Set back chain properly. */ | |
e17a4113 | 386 | store_unsigned_integer (tmp_buffer, wordsize, byte_order, saved_sp); |
4a7622d1 UW |
387 | write_memory (sp, tmp_buffer, wordsize); |
388 | ||
389 | /* Point the inferior function call's return address at the dummy's | |
390 | breakpoint. */ | |
391 | regcache_raw_write_signed (regcache, tdep->ppc_lr_regnum, bp_addr); | |
392 | ||
4d1eb6b4 JB |
393 | /* Set the TOC register value. */ |
394 | regcache_raw_write_signed (regcache, tdep->ppc_toc_regnum, | |
395 | solib_aix_get_toc_value (func_addr)); | |
4a7622d1 UW |
396 | |
397 | target_store_registers (regcache, -1); | |
398 | return sp; | |
399 | } | |
400 | ||
401 | static enum return_value_convention | |
6a3a010b | 402 | rs6000_return_value (struct gdbarch *gdbarch, struct value *function, |
4a7622d1 UW |
403 | struct type *valtype, struct regcache *regcache, |
404 | gdb_byte *readbuf, const gdb_byte *writebuf) | |
405 | { | |
406 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
e17a4113 | 407 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
4a7622d1 UW |
408 | |
409 | /* The calling convention this function implements assumes the | |
410 | processor has floating-point registers. We shouldn't be using it | |
411 | on PowerPC variants that lack them. */ | |
412 | gdb_assert (ppc_floating_point_unit_p (gdbarch)); | |
413 | ||
414 | /* AltiVec extension: Functions that declare a vector data type as a | |
415 | return value place that return value in VR2. */ | |
416 | if (TYPE_CODE (valtype) == TYPE_CODE_ARRAY && TYPE_VECTOR (valtype) | |
417 | && TYPE_LENGTH (valtype) == 16) | |
418 | { | |
419 | if (readbuf) | |
dca08e1f | 420 | regcache->cooked_read (tdep->ppc_vr0_regnum + 2, readbuf); |
4a7622d1 | 421 | if (writebuf) |
b66f5587 | 422 | regcache->cooked_write (tdep->ppc_vr0_regnum + 2, writebuf); |
4a7622d1 UW |
423 | |
424 | return RETURN_VALUE_REGISTER_CONVENTION; | |
425 | } | |
426 | ||
427 | /* If the called subprogram returns an aggregate, there exists an | |
428 | implicit first argument, whose value is the address of a caller- | |
429 | allocated buffer into which the callee is assumed to store its | |
0df8b418 | 430 | return value. All explicit parameters are appropriately |
4a7622d1 UW |
431 | relabeled. */ |
432 | if (TYPE_CODE (valtype) == TYPE_CODE_STRUCT | |
433 | || TYPE_CODE (valtype) == TYPE_CODE_UNION | |
434 | || TYPE_CODE (valtype) == TYPE_CODE_ARRAY) | |
435 | return RETURN_VALUE_STRUCT_CONVENTION; | |
436 | ||
437 | /* Scalar floating-point values are returned in FPR1 for float or | |
438 | double, and in FPR1:FPR2 for quadword precision. Fortran | |
439 | complex*8 and complex*16 are returned in FPR1:FPR2, and | |
440 | complex*32 is returned in FPR1:FPR4. */ | |
441 | if (TYPE_CODE (valtype) == TYPE_CODE_FLT | |
442 | && (TYPE_LENGTH (valtype) == 4 || TYPE_LENGTH (valtype) == 8)) | |
443 | { | |
444 | struct type *regtype = register_type (gdbarch, tdep->ppc_fp0_regnum); | |
445 | gdb_byte regval[8]; | |
446 | ||
447 | /* FIXME: kettenis/2007-01-01: Add support for quadword | |
448 | precision and complex. */ | |
449 | ||
450 | if (readbuf) | |
451 | { | |
dca08e1f | 452 | regcache->cooked_read (tdep->ppc_fp0_regnum + 1, regval); |
3b2ca824 | 453 | target_float_convert (regval, regtype, readbuf, valtype); |
4a7622d1 UW |
454 | } |
455 | if (writebuf) | |
456 | { | |
3b2ca824 | 457 | target_float_convert (writebuf, valtype, regval, regtype); |
b66f5587 | 458 | regcache->cooked_write (tdep->ppc_fp0_regnum + 1, regval); |
4a7622d1 UW |
459 | } |
460 | ||
461 | return RETURN_VALUE_REGISTER_CONVENTION; | |
462 | } | |
463 | ||
464 | /* Values of the types int, long, short, pointer, and char (length | |
465 | is less than or equal to four bytes), as well as bit values of | |
466 | lengths less than or equal to 32 bits, must be returned right | |
467 | justified in GPR3 with signed values sign extended and unsigned | |
468 | values zero extended, as necessary. */ | |
469 | if (TYPE_LENGTH (valtype) <= tdep->wordsize) | |
470 | { | |
471 | if (readbuf) | |
472 | { | |
473 | ULONGEST regval; | |
474 | ||
475 | /* For reading we don't have to worry about sign extension. */ | |
476 | regcache_cooked_read_unsigned (regcache, tdep->ppc_gp0_regnum + 3, | |
477 | ®val); | |
e17a4113 UW |
478 | store_unsigned_integer (readbuf, TYPE_LENGTH (valtype), byte_order, |
479 | regval); | |
4a7622d1 UW |
480 | } |
481 | if (writebuf) | |
482 | { | |
483 | /* For writing, use unpack_long since that should handle any | |
484 | required sign extension. */ | |
485 | regcache_cooked_write_unsigned (regcache, tdep->ppc_gp0_regnum + 3, | |
486 | unpack_long (valtype, writebuf)); | |
487 | } | |
488 | ||
489 | return RETURN_VALUE_REGISTER_CONVENTION; | |
490 | } | |
491 | ||
492 | /* Eight-byte non-floating-point scalar values must be returned in | |
493 | GPR3:GPR4. */ | |
494 | ||
495 | if (TYPE_LENGTH (valtype) == 8) | |
496 | { | |
497 | gdb_assert (TYPE_CODE (valtype) != TYPE_CODE_FLT); | |
498 | gdb_assert (tdep->wordsize == 4); | |
499 | ||
500 | if (readbuf) | |
501 | { | |
502 | gdb_byte regval[8]; | |
503 | ||
dca08e1f SM |
504 | regcache->cooked_read (tdep->ppc_gp0_regnum + 3, regval); |
505 | regcache->cooked_read (tdep->ppc_gp0_regnum + 4, regval + 4); | |
4a7622d1 UW |
506 | memcpy (readbuf, regval, 8); |
507 | } | |
508 | if (writebuf) | |
509 | { | |
b66f5587 SM |
510 | regcache->cooked_write (tdep->ppc_gp0_regnum + 3, writebuf); |
511 | regcache->cooked_write (tdep->ppc_gp0_regnum + 4, writebuf + 4); | |
4a7622d1 UW |
512 | } |
513 | ||
514 | return RETURN_VALUE_REGISTER_CONVENTION; | |
515 | } | |
516 | ||
517 | return RETURN_VALUE_STRUCT_CONVENTION; | |
518 | } | |
519 | ||
520 | /* Support for CONVERT_FROM_FUNC_PTR_ADDR (ARCH, ADDR, TARG). | |
521 | ||
522 | Usually a function pointer's representation is simply the address | |
0df8b418 MS |
523 | of the function. On the RS/6000 however, a function pointer is |
524 | represented by a pointer to an OPD entry. This OPD entry contains | |
4a7622d1 UW |
525 | three words, the first word is the address of the function, the |
526 | second word is the TOC pointer (r2), and the third word is the | |
527 | static chain value. Throughout GDB it is currently assumed that a | |
528 | function pointer contains the address of the function, which is not | |
529 | easy to fix. In addition, the conversion of a function address to | |
530 | a function pointer would require allocation of an OPD entry in the | |
531 | inferior's memory space, with all its drawbacks. To be able to | |
532 | call C++ virtual methods in the inferior (which are called via | |
533 | function pointers), find_function_addr uses this function to get the | |
534 | function address from a function pointer. */ | |
535 | ||
536 | /* Return real function address if ADDR (a function pointer) is in the data | |
537 | space and is therefore a special function pointer. */ | |
538 | ||
539 | static CORE_ADDR | |
540 | rs6000_convert_from_func_ptr_addr (struct gdbarch *gdbarch, | |
541 | CORE_ADDR addr, | |
542 | struct target_ops *targ) | |
543 | { | |
e17a4113 UW |
544 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
545 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
4a7622d1 UW |
546 | struct obj_section *s; |
547 | ||
548 | s = find_pc_section (addr); | |
4a7622d1 | 549 | |
40adab56 JB |
550 | /* Normally, functions live inside a section that is executable. |
551 | So, if ADDR points to a non-executable section, then treat it | |
552 | as a function descriptor and return the target address iff | |
553 | the target address itself points to a section that is executable. */ | |
554 | if (s && (s->the_bfd_section->flags & SEC_CODE) == 0) | |
555 | { | |
57174f31 | 556 | CORE_ADDR pc = 0; |
2971b56b | 557 | struct obj_section *pc_section; |
2971b56b | 558 | |
492d29ea | 559 | TRY |
2971b56b JB |
560 | { |
561 | pc = read_memory_unsigned_integer (addr, tdep->wordsize, byte_order); | |
562 | } | |
492d29ea | 563 | CATCH (e, RETURN_MASK_ERROR) |
2971b56b JB |
564 | { |
565 | /* An error occured during reading. Probably a memory error | |
566 | due to the section not being loaded yet. This address | |
567 | cannot be a function descriptor. */ | |
568 | return addr; | |
569 | } | |
492d29ea PA |
570 | END_CATCH |
571 | ||
2971b56b | 572 | pc_section = find_pc_section (pc); |
40adab56 JB |
573 | |
574 | if (pc_section && (pc_section->the_bfd_section->flags & SEC_CODE)) | |
575 | return pc; | |
576 | } | |
577 | ||
578 | return addr; | |
4a7622d1 UW |
579 | } |
580 | ||
581 | ||
582 | /* Calculate the destination of a branch/jump. Return -1 if not a branch. */ | |
583 | ||
584 | static CORE_ADDR | |
41e26ad3 | 585 | branch_dest (struct regcache *regcache, int opcode, int instr, |
4a7622d1 UW |
586 | CORE_ADDR pc, CORE_ADDR safety) |
587 | { | |
ac7936df | 588 | struct gdbarch *gdbarch = regcache->arch (); |
e17a4113 UW |
589 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
590 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
4a7622d1 UW |
591 | CORE_ADDR dest; |
592 | int immediate; | |
593 | int absolute; | |
594 | int ext_op; | |
595 | ||
596 | absolute = (int) ((instr >> 1) & 1); | |
597 | ||
598 | switch (opcode) | |
599 | { | |
600 | case 18: | |
601 | immediate = ((instr & ~3) << 6) >> 6; /* br unconditional */ | |
602 | if (absolute) | |
603 | dest = immediate; | |
604 | else | |
605 | dest = pc + immediate; | |
606 | break; | |
607 | ||
608 | case 16: | |
609 | immediate = ((instr & ~3) << 16) >> 16; /* br conditional */ | |
610 | if (absolute) | |
611 | dest = immediate; | |
612 | else | |
613 | dest = pc + immediate; | |
614 | break; | |
615 | ||
616 | case 19: | |
617 | ext_op = (instr >> 1) & 0x3ff; | |
618 | ||
619 | if (ext_op == 16) /* br conditional register */ | |
620 | { | |
41e26ad3 | 621 | dest = regcache_raw_get_unsigned (regcache, tdep->ppc_lr_regnum) & ~3; |
4a7622d1 UW |
622 | |
623 | /* If we are about to return from a signal handler, dest is | |
624 | something like 0x3c90. The current frame is a signal handler | |
625 | caller frame, upon completion of the sigreturn system call | |
626 | execution will return to the saved PC in the frame. */ | |
627 | if (dest < AIX_TEXT_SEGMENT_BASE) | |
41e26ad3 YQ |
628 | { |
629 | struct frame_info *frame = get_current_frame (); | |
630 | ||
631 | dest = read_memory_unsigned_integer | |
632 | (get_frame_base (frame) + SIG_FRAME_PC_OFFSET, | |
633 | tdep->wordsize, byte_order); | |
634 | } | |
4a7622d1 UW |
635 | } |
636 | ||
637 | else if (ext_op == 528) /* br cond to count reg */ | |
638 | { | |
41e26ad3 YQ |
639 | dest = regcache_raw_get_unsigned (regcache, |
640 | tdep->ppc_ctr_regnum) & ~3; | |
4a7622d1 UW |
641 | |
642 | /* If we are about to execute a system call, dest is something | |
643 | like 0x22fc or 0x3b00. Upon completion the system call | |
644 | will return to the address in the link register. */ | |
645 | if (dest < AIX_TEXT_SEGMENT_BASE) | |
41e26ad3 YQ |
646 | dest = regcache_raw_get_unsigned (regcache, |
647 | tdep->ppc_lr_regnum) & ~3; | |
4a7622d1 UW |
648 | } |
649 | else | |
650 | return -1; | |
651 | break; | |
652 | ||
653 | default: | |
654 | return -1; | |
655 | } | |
656 | return (dest < AIX_TEXT_SEGMENT_BASE) ? safety : dest; | |
657 | } | |
658 | ||
659 | /* AIX does not support PT_STEP. Simulate it. */ | |
660 | ||
a0ff9e1a | 661 | static std::vector<CORE_ADDR> |
f5ea389a | 662 | rs6000_software_single_step (struct regcache *regcache) |
4a7622d1 | 663 | { |
ac7936df | 664 | struct gdbarch *gdbarch = regcache->arch (); |
e17a4113 | 665 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
4a7622d1 UW |
666 | int ii, insn; |
667 | CORE_ADDR loc; | |
668 | CORE_ADDR breaks[2]; | |
669 | int opcode; | |
670 | ||
41e26ad3 | 671 | loc = regcache_read_pc (regcache); |
4a7622d1 | 672 | |
e17a4113 | 673 | insn = read_memory_integer (loc, 4, byte_order); |
4a7622d1 | 674 | |
a0ff9e1a SM |
675 | std::vector<CORE_ADDR> next_pcs = ppc_deal_with_atomic_sequence (regcache); |
676 | if (!next_pcs.empty ()) | |
93f9a11f | 677 | return next_pcs; |
4a7622d1 UW |
678 | |
679 | breaks[0] = loc + PPC_INSN_SIZE; | |
680 | opcode = insn >> 26; | |
41e26ad3 | 681 | breaks[1] = branch_dest (regcache, opcode, insn, loc, breaks[0]); |
4a7622d1 | 682 | |
0df8b418 | 683 | /* Don't put two breakpoints on the same address. */ |
4a7622d1 UW |
684 | if (breaks[1] == breaks[0]) |
685 | breaks[1] = -1; | |
686 | ||
687 | for (ii = 0; ii < 2; ++ii) | |
688 | { | |
0df8b418 | 689 | /* ignore invalid breakpoint. */ |
4a7622d1 UW |
690 | if (breaks[ii] == -1) |
691 | continue; | |
a0ff9e1a SM |
692 | |
693 | next_pcs.push_back (breaks[ii]); | |
4a7622d1 UW |
694 | } |
695 | ||
0df8b418 | 696 | errno = 0; /* FIXME, don't ignore errors! */ |
4a7622d1 | 697 | /* What errors? {read,write}_memory call error(). */ |
93f9a11f | 698 | return next_pcs; |
4a7622d1 UW |
699 | } |
700 | ||
38a69d0a JB |
701 | /* Implement the "auto_wide_charset" gdbarch method for this platform. */ |
702 | ||
703 | static const char * | |
704 | rs6000_aix_auto_wide_charset (void) | |
705 | { | |
706 | return "UTF-16"; | |
707 | } | |
708 | ||
beb4b03c JB |
709 | /* Implement an osabi sniffer for RS6000/AIX. |
710 | ||
711 | This function assumes that ABFD's flavour is XCOFF. In other words, | |
712 | it should be registered as a sniffer for bfd_target_xcoff_flavour | |
713 | objfiles only. A failed assertion will be raised if this condition | |
714 | is not met. */ | |
715 | ||
1f82754b JB |
716 | static enum gdb_osabi |
717 | rs6000_aix_osabi_sniffer (bfd *abfd) | |
718 | { | |
beb4b03c | 719 | gdb_assert (bfd_get_flavour (abfd) == bfd_target_xcoff_flavour); |
1f82754b | 720 | |
d5367fe1 JB |
721 | /* The only noticeable difference between Lynx178 XCOFF files and |
722 | AIX XCOFF files comes from the fact that there are no shared | |
723 | libraries on Lynx178. On AIX, we are betting that an executable | |
724 | linked with no shared library will never exist. */ | |
725 | if (xcoff_get_n_import_files (abfd) <= 0) | |
726 | return GDB_OSABI_UNKNOWN; | |
727 | ||
beb4b03c | 728 | return GDB_OSABI_AIX; |
1f82754b JB |
729 | } |
730 | ||
356a5233 JB |
731 | /* A structure encoding the offset and size of a field within |
732 | a struct. */ | |
733 | ||
734 | struct field_info | |
735 | { | |
736 | int offset; | |
737 | int size; | |
738 | }; | |
739 | ||
740 | /* A structure describing the layout of all the fields of interest | |
741 | in AIX's struct ld_info. Each field in this struct corresponds | |
742 | to the field of the same name in struct ld_info. */ | |
743 | ||
744 | struct ld_info_desc | |
745 | { | |
746 | struct field_info ldinfo_next; | |
747 | struct field_info ldinfo_fd; | |
748 | struct field_info ldinfo_textorg; | |
749 | struct field_info ldinfo_textsize; | |
750 | struct field_info ldinfo_dataorg; | |
751 | struct field_info ldinfo_datasize; | |
752 | struct field_info ldinfo_filename; | |
753 | }; | |
754 | ||
755 | /* The following data has been generated by compiling and running | |
756 | the following program on AIX 5.3. */ | |
757 | ||
758 | #if 0 | |
1c432e72 JB |
759 | #include <stddef.h> |
760 | #include <stdio.h> | |
761 | #define __LDINFO_PTRACE32__ | |
762 | #define __LDINFO_PTRACE64__ | |
763 | #include <sys/ldr.h> | |
764 | ||
765 | #define pinfo(type,member) \ | |
766 | { \ | |
767 | struct type ldi = {0}; \ | |
768 | \ | |
769 | printf (" {%d, %d},\t/* %s */\n", \ | |
770 | offsetof (struct type, member), \ | |
771 | sizeof (ldi.member), \ | |
772 | #member); \ | |
773 | } \ | |
774 | while (0) | |
775 | ||
776 | int | |
777 | main (void) | |
778 | { | |
779 | printf ("static const struct ld_info_desc ld_info32_desc =\n{\n"); | |
780 | pinfo (__ld_info32, ldinfo_next); | |
781 | pinfo (__ld_info32, ldinfo_fd); | |
782 | pinfo (__ld_info32, ldinfo_textorg); | |
783 | pinfo (__ld_info32, ldinfo_textsize); | |
784 | pinfo (__ld_info32, ldinfo_dataorg); | |
785 | pinfo (__ld_info32, ldinfo_datasize); | |
786 | pinfo (__ld_info32, ldinfo_filename); | |
787 | printf ("};\n"); | |
788 | ||
789 | printf ("\n"); | |
790 | ||
791 | printf ("static const struct ld_info_desc ld_info64_desc =\n{\n"); | |
792 | pinfo (__ld_info64, ldinfo_next); | |
793 | pinfo (__ld_info64, ldinfo_fd); | |
794 | pinfo (__ld_info64, ldinfo_textorg); | |
795 | pinfo (__ld_info64, ldinfo_textsize); | |
796 | pinfo (__ld_info64, ldinfo_dataorg); | |
797 | pinfo (__ld_info64, ldinfo_datasize); | |
798 | pinfo (__ld_info64, ldinfo_filename); | |
799 | printf ("};\n"); | |
800 | ||
801 | return 0; | |
802 | } | |
356a5233 JB |
803 | #endif /* 0 */ |
804 | ||
805 | /* Layout of the 32bit version of struct ld_info. */ | |
806 | ||
807 | static const struct ld_info_desc ld_info32_desc = | |
808 | { | |
809 | {0, 4}, /* ldinfo_next */ | |
810 | {4, 4}, /* ldinfo_fd */ | |
811 | {8, 4}, /* ldinfo_textorg */ | |
812 | {12, 4}, /* ldinfo_textsize */ | |
813 | {16, 4}, /* ldinfo_dataorg */ | |
814 | {20, 4}, /* ldinfo_datasize */ | |
815 | {24, 2}, /* ldinfo_filename */ | |
816 | }; | |
817 | ||
818 | /* Layout of the 64bit version of struct ld_info. */ | |
819 | ||
820 | static const struct ld_info_desc ld_info64_desc = | |
821 | { | |
822 | {0, 4}, /* ldinfo_next */ | |
823 | {8, 4}, /* ldinfo_fd */ | |
824 | {16, 8}, /* ldinfo_textorg */ | |
825 | {24, 8}, /* ldinfo_textsize */ | |
826 | {32, 8}, /* ldinfo_dataorg */ | |
827 | {40, 8}, /* ldinfo_datasize */ | |
828 | {48, 2}, /* ldinfo_filename */ | |
829 | }; | |
830 | ||
831 | /* A structured representation of one entry read from the ld_info | |
832 | binary data provided by the AIX loader. */ | |
833 | ||
834 | struct ld_info | |
835 | { | |
836 | ULONGEST next; | |
837 | int fd; | |
838 | CORE_ADDR textorg; | |
839 | ULONGEST textsize; | |
840 | CORE_ADDR dataorg; | |
841 | ULONGEST datasize; | |
842 | char *filename; | |
843 | char *member_name; | |
844 | }; | |
845 | ||
846 | /* Return a struct ld_info object corresponding to the entry at | |
847 | LDI_BUF. | |
848 | ||
849 | Note that the filename and member_name strings still point | |
850 | to the data in LDI_BUF. So LDI_BUF must not be deallocated | |
851 | while the struct ld_info object returned is in use. */ | |
852 | ||
853 | static struct ld_info | |
854 | rs6000_aix_extract_ld_info (struct gdbarch *gdbarch, | |
855 | const gdb_byte *ldi_buf) | |
856 | { | |
857 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
858 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
859 | struct type *ptr_type = builtin_type (gdbarch)->builtin_data_ptr; | |
860 | const struct ld_info_desc desc | |
861 | = tdep->wordsize == 8 ? ld_info64_desc : ld_info32_desc; | |
862 | struct ld_info info; | |
863 | ||
864 | info.next = extract_unsigned_integer (ldi_buf + desc.ldinfo_next.offset, | |
865 | desc.ldinfo_next.size, | |
866 | byte_order); | |
867 | info.fd = extract_signed_integer (ldi_buf + desc.ldinfo_fd.offset, | |
868 | desc.ldinfo_fd.size, | |
869 | byte_order); | |
870 | info.textorg = extract_typed_address (ldi_buf + desc.ldinfo_textorg.offset, | |
871 | ptr_type); | |
872 | info.textsize | |
873 | = extract_unsigned_integer (ldi_buf + desc.ldinfo_textsize.offset, | |
874 | desc.ldinfo_textsize.size, | |
875 | byte_order); | |
876 | info.dataorg = extract_typed_address (ldi_buf + desc.ldinfo_dataorg.offset, | |
877 | ptr_type); | |
878 | info.datasize | |
879 | = extract_unsigned_integer (ldi_buf + desc.ldinfo_datasize.offset, | |
880 | desc.ldinfo_datasize.size, | |
881 | byte_order); | |
882 | info.filename = (char *) ldi_buf + desc.ldinfo_filename.offset; | |
883 | info.member_name = info.filename + strlen (info.filename) + 1; | |
884 | ||
885 | return info; | |
886 | } | |
887 | ||
888 | /* Append to OBJSTACK an XML string description of the shared library | |
889 | corresponding to LDI, following the TARGET_OBJECT_LIBRARIES_AIX | |
890 | format. */ | |
891 | ||
892 | static void | |
893 | rs6000_aix_shared_library_to_xml (struct ld_info *ldi, | |
894 | struct obstack *obstack) | |
895 | { | |
356a5233 | 896 | obstack_grow_str (obstack, "<library name=\""); |
5e187554 SM |
897 | std::string p = xml_escape_text (ldi->filename); |
898 | obstack_grow_str (obstack, p.c_str ()); | |
356a5233 JB |
899 | obstack_grow_str (obstack, "\""); |
900 | ||
901 | if (ldi->member_name[0] != '\0') | |
902 | { | |
903 | obstack_grow_str (obstack, " member=\""); | |
904 | p = xml_escape_text (ldi->member_name); | |
5e187554 | 905 | obstack_grow_str (obstack, p.c_str ()); |
356a5233 JB |
906 | obstack_grow_str (obstack, "\""); |
907 | } | |
908 | ||
909 | obstack_grow_str (obstack, " text_addr=\""); | |
910 | obstack_grow_str (obstack, core_addr_to_string (ldi->textorg)); | |
911 | obstack_grow_str (obstack, "\""); | |
912 | ||
913 | obstack_grow_str (obstack, " text_size=\""); | |
914 | obstack_grow_str (obstack, pulongest (ldi->textsize)); | |
915 | obstack_grow_str (obstack, "\""); | |
916 | ||
917 | obstack_grow_str (obstack, " data_addr=\""); | |
918 | obstack_grow_str (obstack, core_addr_to_string (ldi->dataorg)); | |
919 | obstack_grow_str (obstack, "\""); | |
920 | ||
921 | obstack_grow_str (obstack, " data_size=\""); | |
922 | obstack_grow_str (obstack, pulongest (ldi->datasize)); | |
923 | obstack_grow_str (obstack, "\""); | |
924 | ||
925 | obstack_grow_str (obstack, "></library>"); | |
926 | } | |
927 | ||
928 | /* Convert the ld_info binary data provided by the AIX loader into | |
929 | an XML representation following the TARGET_OBJECT_LIBRARIES_AIX | |
930 | format. | |
931 | ||
932 | LDI_BUF is a buffer containing the ld_info data. | |
933 | READBUF, OFFSET and LEN follow the same semantics as target_ops' | |
934 | to_xfer_partial target_ops method. | |
935 | ||
936 | If CLOSE_LDINFO_FD is nonzero, then this routine also closes | |
937 | the ldinfo_fd file descriptor. This is useful when the ldinfo | |
938 | data is obtained via ptrace, as ptrace opens a file descriptor | |
939 | for each and every entry; but we cannot use this descriptor | |
940 | as the consumer of the XML library list might live in a different | |
941 | process. */ | |
942 | ||
c09f20e4 | 943 | ULONGEST |
356a5233 | 944 | rs6000_aix_ld_info_to_xml (struct gdbarch *gdbarch, const gdb_byte *ldi_buf, |
b55e14c7 | 945 | gdb_byte *readbuf, ULONGEST offset, ULONGEST len, |
356a5233 JB |
946 | int close_ldinfo_fd) |
947 | { | |
948 | struct obstack obstack; | |
949 | const char *buf; | |
c09f20e4 | 950 | ULONGEST len_avail; |
356a5233 JB |
951 | |
952 | obstack_init (&obstack); | |
953 | obstack_grow_str (&obstack, "<library-list-aix version=\"1.0\">\n"); | |
954 | ||
955 | while (1) | |
956 | { | |
957 | struct ld_info ldi = rs6000_aix_extract_ld_info (gdbarch, ldi_buf); | |
958 | ||
959 | rs6000_aix_shared_library_to_xml (&ldi, &obstack); | |
960 | if (close_ldinfo_fd) | |
961 | close (ldi.fd); | |
962 | ||
963 | if (!ldi.next) | |
964 | break; | |
965 | ldi_buf = ldi_buf + ldi.next; | |
966 | } | |
967 | ||
968 | obstack_grow_str0 (&obstack, "</library-list-aix>\n"); | |
969 | ||
224c3ddb | 970 | buf = (const char *) obstack_finish (&obstack); |
356a5233 JB |
971 | len_avail = strlen (buf); |
972 | if (offset >= len_avail) | |
973 | len= 0; | |
974 | else | |
975 | { | |
976 | if (len > len_avail - offset) | |
977 | len = len_avail - offset; | |
978 | memcpy (readbuf, buf + offset, len); | |
979 | } | |
980 | ||
981 | obstack_free (&obstack, NULL); | |
982 | return len; | |
983 | } | |
984 | ||
985 | /* Implement the core_xfer_shared_libraries_aix gdbarch method. */ | |
986 | ||
c09f20e4 | 987 | static ULONGEST |
356a5233 JB |
988 | rs6000_aix_core_xfer_shared_libraries_aix (struct gdbarch *gdbarch, |
989 | gdb_byte *readbuf, | |
990 | ULONGEST offset, | |
7ec1862d | 991 | ULONGEST len) |
356a5233 JB |
992 | { |
993 | struct bfd_section *ldinfo_sec; | |
994 | int ldinfo_size; | |
356a5233 JB |
995 | |
996 | ldinfo_sec = bfd_get_section_by_name (core_bfd, ".ldinfo"); | |
997 | if (ldinfo_sec == NULL) | |
998 | error (_("cannot find .ldinfo section from core file: %s"), | |
999 | bfd_errmsg (bfd_get_error ())); | |
1000 | ldinfo_size = bfd_get_section_size (ldinfo_sec); | |
1001 | ||
984c7238 | 1002 | gdb::byte_vector ldinfo_buf (ldinfo_size); |
356a5233 JB |
1003 | |
1004 | if (! bfd_get_section_contents (core_bfd, ldinfo_sec, | |
984c7238 | 1005 | ldinfo_buf.data (), 0, ldinfo_size)) |
356a5233 JB |
1006 | error (_("unable to read .ldinfo section from core file: %s"), |
1007 | bfd_errmsg (bfd_get_error ())); | |
1008 | ||
984c7238 TT |
1009 | return rs6000_aix_ld_info_to_xml (gdbarch, ldinfo_buf.data (), readbuf, |
1010 | offset, len, 0); | |
356a5233 JB |
1011 | } |
1012 | ||
1f82754b JB |
1013 | static void |
1014 | rs6000_aix_init_osabi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
1015 | { | |
4a7622d1 UW |
1016 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
1017 | ||
1f82754b JB |
1018 | /* RS6000/AIX does not support PT_STEP. Has to be simulated. */ |
1019 | set_gdbarch_software_single_step (gdbarch, rs6000_software_single_step); | |
6f7f3f0d | 1020 | |
2454a024 UW |
1021 | /* Displaced stepping is currently not supported in combination with |
1022 | software single-stepping. */ | |
1023 | set_gdbarch_displaced_step_copy_insn (gdbarch, NULL); | |
1024 | set_gdbarch_displaced_step_fixup (gdbarch, NULL); | |
2454a024 UW |
1025 | set_gdbarch_displaced_step_location (gdbarch, NULL); |
1026 | ||
4a7622d1 UW |
1027 | set_gdbarch_push_dummy_call (gdbarch, rs6000_push_dummy_call); |
1028 | set_gdbarch_return_value (gdbarch, rs6000_return_value); | |
1029 | set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT); | |
1030 | ||
1031 | /* Handle RS/6000 function pointers (which are really function | |
1032 | descriptors). */ | |
1033 | set_gdbarch_convert_from_func_ptr_addr | |
1034 | (gdbarch, rs6000_convert_from_func_ptr_addr); | |
1035 | ||
7a61a01c | 1036 | /* Core file support. */ |
23ea9aeb AA |
1037 | set_gdbarch_iterate_over_regset_sections |
1038 | (gdbarch, rs6000_aix_iterate_over_regset_sections); | |
356a5233 JB |
1039 | set_gdbarch_core_xfer_shared_libraries_aix |
1040 | (gdbarch, rs6000_aix_core_xfer_shared_libraries_aix); | |
7a61a01c | 1041 | |
4a7622d1 UW |
1042 | if (tdep->wordsize == 8) |
1043 | tdep->lr_frame_offset = 16; | |
1044 | else | |
1045 | tdep->lr_frame_offset = 8; | |
1046 | ||
1047 | if (tdep->wordsize == 4) | |
1048 | /* PowerOpen / AIX 32 bit. The saved area or red zone consists of | |
1049 | 19 4 byte GPRS + 18 8 byte FPRs giving a total of 220 bytes. | |
1050 | Problem is, 220 isn't frame (16 byte) aligned. Round it up to | |
1051 | 224. */ | |
1052 | set_gdbarch_frame_red_zone_size (gdbarch, 224); | |
1053 | else | |
1054 | set_gdbarch_frame_red_zone_size (gdbarch, 0); | |
38a69d0a | 1055 | |
53375380 PA |
1056 | if (tdep->wordsize == 8) |
1057 | set_gdbarch_wchar_bit (gdbarch, 32); | |
1058 | else | |
1059 | set_gdbarch_wchar_bit (gdbarch, 16); | |
1060 | set_gdbarch_wchar_signed (gdbarch, 0); | |
38a69d0a | 1061 | set_gdbarch_auto_wide_charset (gdbarch, rs6000_aix_auto_wide_charset); |
4d1eb6b4 JB |
1062 | |
1063 | set_solib_ops (gdbarch, &solib_aix_so_ops); | |
1f82754b JB |
1064 | } |
1065 | ||
1066 | void | |
1067 | _initialize_rs6000_aix_tdep (void) | |
1068 | { | |
1069 | gdbarch_register_osabi_sniffer (bfd_arch_rs6000, | |
1070 | bfd_target_xcoff_flavour, | |
1071 | rs6000_aix_osabi_sniffer); | |
7a61a01c UW |
1072 | gdbarch_register_osabi_sniffer (bfd_arch_powerpc, |
1073 | bfd_target_xcoff_flavour, | |
1074 | rs6000_aix_osabi_sniffer); | |
1f82754b JB |
1075 | |
1076 | gdbarch_register_osabi (bfd_arch_rs6000, 0, GDB_OSABI_AIX, | |
1077 | rs6000_aix_init_osabi); | |
7a61a01c UW |
1078 | gdbarch_register_osabi (bfd_arch_powerpc, 0, GDB_OSABI_AIX, |
1079 | rs6000_aix_init_osabi); | |
1f82754b JB |
1080 | } |
1081 |