Commit | Line | Data |
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c906108c | 1 | /* Target-dependent code for the HP PA architecture, for GDB. |
cda5a58a AC |
2 | |
3 | Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993, 1994, 1995, | |
adc11376 AC |
4 | 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software |
5 | Foundation, Inc. | |
c906108c SS |
6 | |
7 | Contributed by the Center for Software Science at the | |
8 | University of Utah (pa-gdb-bugs@cs.utah.edu). | |
9 | ||
c5aa993b | 10 | This file is part of GDB. |
c906108c | 11 | |
c5aa993b JM |
12 | This program is free software; you can redistribute it and/or modify |
13 | it under the terms of the GNU General Public License as published by | |
14 | the Free Software Foundation; either version 2 of the License, or | |
15 | (at your option) any later version. | |
c906108c | 16 | |
c5aa993b JM |
17 | This program is distributed in the hope that it will be useful, |
18 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | GNU General Public License for more details. | |
c906108c | 21 | |
c5aa993b JM |
22 | You should have received a copy of the GNU General Public License |
23 | along with this program; if not, write to the Free Software | |
24 | Foundation, Inc., 59 Temple Place - Suite 330, | |
25 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
26 | |
27 | #include "defs.h" | |
28 | #include "frame.h" | |
29 | #include "bfd.h" | |
30 | #include "inferior.h" | |
31 | #include "value.h" | |
4e052eda | 32 | #include "regcache.h" |
e5d66720 | 33 | #include "completer.h" |
d709c020 | 34 | #include "language.h" |
59623e27 | 35 | #include "osabi.h" |
a7ff40e7 | 36 | #include "gdb_assert.h" |
65e82032 | 37 | #include "infttrace.h" |
343af405 | 38 | #include "arch-utils.h" |
c906108c SS |
39 | /* For argument passing to the inferior */ |
40 | #include "symtab.h" | |
04714b91 | 41 | #include "infcall.h" |
fde2cceb | 42 | #include "dis-asm.h" |
26d08f08 AC |
43 | #include "trad-frame.h" |
44 | #include "frame-unwind.h" | |
45 | #include "frame-base.h" | |
c906108c SS |
46 | |
47 | #ifdef USG | |
48 | #include <sys/types.h> | |
49 | #endif | |
50 | ||
51 | #include <dl.h> | |
52 | #include <sys/param.h> | |
53 | #include <signal.h> | |
54 | ||
55 | #include <sys/ptrace.h> | |
56 | #include <machine/save_state.h> | |
57 | ||
58 | #ifdef COFF_ENCAPSULATE | |
59 | #include "a.out.encap.h" | |
60 | #else | |
61 | #endif | |
62 | ||
c5aa993b | 63 | /*#include <sys/user.h> After a.out.h */ |
c906108c SS |
64 | #include <sys/file.h> |
65 | #include "gdb_stat.h" | |
03f2053f | 66 | #include "gdb_wait.h" |
c906108c SS |
67 | |
68 | #include "gdbcore.h" | |
69 | #include "gdbcmd.h" | |
70 | #include "target.h" | |
71 | #include "symfile.h" | |
72 | #include "objfiles.h" | |
3ff7cf9e | 73 | #include "hppa-tdep.h" |
c906108c | 74 | |
60383d10 | 75 | /* Some local constants. */ |
3ff7cf9e JB |
76 | static const int hppa32_num_regs = 128; |
77 | static const int hppa64_num_regs = 96; | |
78 | ||
79 | static const int hppa64_call_dummy_breakpoint_offset = 22 * 4; | |
80 | ||
81 | /* DEPRECATED_CALL_DUMMY_LENGTH is computed based on the size of a | |
82 | word on the target machine, not the size of an instruction. Since | |
83 | a word on this target holds two instructions we have to divide the | |
84 | instruction size by two to get the word size of the dummy. */ | |
85 | static const int hppa32_call_dummy_length = INSTRUCTION_SIZE * 28; | |
86 | static const int hppa64_call_dummy_length = INSTRUCTION_SIZE * 26 / 2; | |
60383d10 | 87 | |
e2ac8128 JB |
88 | /* Get at various relevent fields of an instruction word. */ |
89 | #define MASK_5 0x1f | |
90 | #define MASK_11 0x7ff | |
91 | #define MASK_14 0x3fff | |
92 | #define MASK_21 0x1fffff | |
93 | ||
94 | /* Define offsets into the call dummy for the target function address. | |
95 | See comments related to CALL_DUMMY for more info. */ | |
96 | #define FUNC_LDIL_OFFSET (INSTRUCTION_SIZE * 9) | |
97 | #define FUNC_LDO_OFFSET (INSTRUCTION_SIZE * 10) | |
98 | ||
99 | /* Define offsets into the call dummy for the _sr4export address. | |
100 | See comments related to CALL_DUMMY for more info. */ | |
101 | #define SR4EXPORT_LDIL_OFFSET (INSTRUCTION_SIZE * 12) | |
102 | #define SR4EXPORT_LDO_OFFSET (INSTRUCTION_SIZE * 13) | |
103 | ||
c906108c SS |
104 | /* To support detection of the pseudo-initial frame |
105 | that threads have. */ | |
106 | #define THREAD_INITIAL_FRAME_SYMBOL "__pthread_exit" | |
107 | #define THREAD_INITIAL_FRAME_SYM_LEN sizeof(THREAD_INITIAL_FRAME_SYMBOL) | |
c5aa993b | 108 | |
e2ac8128 JB |
109 | /* Sizes (in bytes) of the native unwind entries. */ |
110 | #define UNWIND_ENTRY_SIZE 16 | |
111 | #define STUB_UNWIND_ENTRY_SIZE 8 | |
112 | ||
113 | static int get_field (unsigned word, int from, int to); | |
114 | ||
a14ed312 | 115 | static int extract_5_load (unsigned int); |
c906108c | 116 | |
a14ed312 | 117 | static unsigned extract_5R_store (unsigned int); |
c906108c | 118 | |
a14ed312 | 119 | static unsigned extract_5r_store (unsigned int); |
c906108c | 120 | |
343af405 AC |
121 | static void hppa_frame_init_saved_regs (struct frame_info *frame); |
122 | ||
43bd9a9e | 123 | static void find_dummy_frame_regs (struct frame_info *, CORE_ADDR *); |
c906108c | 124 | |
a14ed312 | 125 | static int find_proc_framesize (CORE_ADDR); |
c906108c | 126 | |
a14ed312 | 127 | static int find_return_regnum (CORE_ADDR); |
c906108c | 128 | |
a14ed312 | 129 | struct unwind_table_entry *find_unwind_entry (CORE_ADDR); |
c906108c | 130 | |
a14ed312 | 131 | static int extract_17 (unsigned int); |
c906108c | 132 | |
a14ed312 | 133 | static unsigned deposit_21 (unsigned int, unsigned int); |
c906108c | 134 | |
a14ed312 | 135 | static int extract_21 (unsigned); |
c906108c | 136 | |
a14ed312 | 137 | static unsigned deposit_14 (int, unsigned int); |
c906108c | 138 | |
a14ed312 | 139 | static int extract_14 (unsigned); |
c906108c | 140 | |
a14ed312 | 141 | static void unwind_command (char *, int); |
c906108c | 142 | |
a14ed312 | 143 | static int low_sign_extend (unsigned int, unsigned int); |
c906108c | 144 | |
a14ed312 | 145 | static int sign_extend (unsigned int, unsigned int); |
c906108c | 146 | |
43bd9a9e | 147 | static int restore_pc_queue (CORE_ADDR *); |
c906108c | 148 | |
a14ed312 | 149 | static int hppa_alignof (struct type *); |
c906108c | 150 | |
a14ed312 | 151 | static int prologue_inst_adjust_sp (unsigned long); |
c906108c | 152 | |
a14ed312 | 153 | static int is_branch (unsigned long); |
c906108c | 154 | |
a14ed312 | 155 | static int inst_saves_gr (unsigned long); |
c906108c | 156 | |
a14ed312 | 157 | static int inst_saves_fr (unsigned long); |
c906108c | 158 | |
a14ed312 | 159 | static int pc_in_interrupt_handler (CORE_ADDR); |
c906108c | 160 | |
a14ed312 | 161 | static int pc_in_linker_stub (CORE_ADDR); |
c906108c | 162 | |
a14ed312 | 163 | static int compare_unwind_entries (const void *, const void *); |
c906108c | 164 | |
a14ed312 | 165 | static void read_unwind_info (struct objfile *); |
c906108c | 166 | |
a14ed312 KB |
167 | static void internalize_unwinds (struct objfile *, |
168 | struct unwind_table_entry *, | |
169 | asection *, unsigned int, | |
170 | unsigned int, CORE_ADDR); | |
171 | static void pa_print_registers (char *, int, int); | |
d9fcf2fb | 172 | static void pa_strcat_registers (char *, int, int, struct ui_file *); |
a14ed312 KB |
173 | static void pa_register_look_aside (char *, int, long *); |
174 | static void pa_print_fp_reg (int); | |
d9fcf2fb | 175 | static void pa_strcat_fp_reg (int, struct ui_file *, enum precision_type); |
a14ed312 | 176 | static void record_text_segment_lowaddr (bfd *, asection *, void *); |
d709c020 JB |
177 | /* FIXME: brobecker 2002-11-07: We will likely be able to make the |
178 | following functions static, once we hppa is partially multiarched. */ | |
179 | int hppa_reg_struct_has_addr (int gcc_p, struct type *type); | |
60383d10 JB |
180 | CORE_ADDR hppa_skip_prologue (CORE_ADDR pc); |
181 | CORE_ADDR hppa_skip_trampoline_code (CORE_ADDR pc); | |
182 | int hppa_in_solib_call_trampoline (CORE_ADDR pc, char *name); | |
183 | int hppa_in_solib_return_trampoline (CORE_ADDR pc, char *name); | |
184 | CORE_ADDR hppa_saved_pc_after_call (struct frame_info *frame); | |
d709c020 | 185 | int hppa_inner_than (CORE_ADDR lhs, CORE_ADDR rhs); |
3ff7cf9e | 186 | CORE_ADDR hppa64_stack_align (CORE_ADDR sp); |
d709c020 JB |
187 | int hppa_pc_requires_run_before_use (CORE_ADDR pc); |
188 | int hppa_instruction_nullified (void); | |
60e1ff27 | 189 | int hppa_register_raw_size (int reg_nr); |
d709c020 | 190 | int hppa_register_byte (int reg_nr); |
3ff7cf9e JB |
191 | struct type * hppa32_register_virtual_type (int reg_nr); |
192 | struct type * hppa64_register_virtual_type (int reg_nr); | |
d709c020 | 193 | void hppa_store_struct_return (CORE_ADDR addr, CORE_ADDR sp); |
3ff7cf9e JB |
194 | void hppa64_extract_return_value (struct type *type, char *regbuf, |
195 | char *valbuf); | |
3ff7cf9e | 196 | int hppa64_use_struct_convention (int gcc_p, struct type *type); |
3ff7cf9e | 197 | void hppa64_store_return_value (struct type *type, char *valbuf); |
d709c020 | 198 | int hppa_cannot_store_register (int regnum); |
60383d10 JB |
199 | void hppa_init_extra_frame_info (int fromleaf, struct frame_info *frame); |
200 | CORE_ADDR hppa_frame_chain (struct frame_info *frame); | |
201 | int hppa_frame_chain_valid (CORE_ADDR chain, struct frame_info *thisframe); | |
202 | int hppa_frameless_function_invocation (struct frame_info *frame); | |
203 | CORE_ADDR hppa_frame_saved_pc (struct frame_info *frame); | |
d709c020 | 204 | CORE_ADDR hppa_frame_args_address (struct frame_info *fi); |
60383d10 | 205 | int hppa_frame_num_args (struct frame_info *frame); |
7daf4f5b | 206 | void hppa_push_dummy_frame (void); |
60383d10 JB |
207 | void hppa_pop_frame (void); |
208 | CORE_ADDR hppa_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun, | |
209 | int nargs, struct value **args, | |
210 | struct type *type, int gcc_p); | |
211 | CORE_ADDR hppa_push_arguments (int nargs, struct value **args, CORE_ADDR sp, | |
212 | int struct_return, CORE_ADDR struct_addr); | |
d709c020 | 213 | CORE_ADDR hppa_smash_text_address (CORE_ADDR addr); |
60383d10 JB |
214 | CORE_ADDR hppa_target_read_pc (ptid_t ptid); |
215 | void hppa_target_write_pc (CORE_ADDR v, ptid_t ptid); | |
216 | CORE_ADDR hppa_target_read_fp (void); | |
c906108c | 217 | |
c5aa993b JM |
218 | typedef struct |
219 | { | |
220 | struct minimal_symbol *msym; | |
221 | CORE_ADDR solib_handle; | |
a0b3c4fd | 222 | CORE_ADDR return_val; |
c5aa993b JM |
223 | } |
224 | args_for_find_stub; | |
c906108c | 225 | |
4efb68b1 | 226 | static int cover_find_stub_with_shl_get (void *); |
c906108c | 227 | |
c5aa993b | 228 | static int is_pa_2 = 0; /* False */ |
c906108c | 229 | |
c5aa993b | 230 | /* This is declared in symtab.c; set to 1 in hp-symtab-read.c */ |
c906108c SS |
231 | extern int hp_som_som_object_present; |
232 | ||
233 | /* In breakpoint.c */ | |
234 | extern int exception_catchpoints_are_fragile; | |
235 | ||
c906108c | 236 | /* Should call_function allocate stack space for a struct return? */ |
d709c020 | 237 | |
3ff7cf9e JB |
238 | int |
239 | hppa64_use_struct_convention (int gcc_p, struct type *type) | |
240 | { | |
241 | /* RM: struct upto 128 bits are returned in registers */ | |
242 | return TYPE_LENGTH (type) > 16; | |
243 | } | |
c5aa993b | 244 | |
537987fc AC |
245 | /* Handle 32/64-bit struct return conventions. */ |
246 | ||
247 | static enum return_value_convention | |
248 | hppa32_return_value (struct gdbarch *gdbarch, | |
249 | struct type *type, struct regcache *regcache, | |
250 | void *readbuf, const void *writebuf) | |
251 | { | |
252 | if (TYPE_CODE (type) == TYPE_CODE_FLT) | |
253 | { | |
254 | if (readbuf != NULL) | |
255 | regcache_cooked_read_part (regcache, FP4_REGNUM, 0, | |
256 | TYPE_LENGTH (type), readbuf); | |
257 | if (writebuf != NULL) | |
258 | regcache_cooked_write_part (regcache, FP4_REGNUM, 0, | |
259 | TYPE_LENGTH (type), writebuf); | |
260 | return RETURN_VALUE_REGISTER_CONVENTION; | |
261 | } | |
262 | if (TYPE_LENGTH (type) <= 2 * 4) | |
263 | { | |
264 | /* The value always lives in the right hand end of the register | |
265 | (or register pair)? */ | |
266 | int b; | |
267 | int reg = 28; | |
268 | int part = TYPE_LENGTH (type) % 4; | |
269 | /* The left hand register contains only part of the value, | |
270 | transfer that first so that the rest can be xfered as entire | |
271 | 4-byte registers. */ | |
272 | if (part > 0) | |
273 | { | |
274 | if (readbuf != NULL) | |
275 | regcache_cooked_read_part (regcache, reg, 4 - part, | |
276 | part, readbuf); | |
277 | if (writebuf != NULL) | |
278 | regcache_cooked_write_part (regcache, reg, 4 - part, | |
279 | part, writebuf); | |
280 | reg++; | |
281 | } | |
282 | /* Now transfer the remaining register values. */ | |
283 | for (b = part; b < TYPE_LENGTH (type); b += 4) | |
284 | { | |
285 | if (readbuf != NULL) | |
286 | regcache_cooked_read (regcache, reg, (char *) readbuf + b); | |
287 | if (writebuf != NULL) | |
288 | regcache_cooked_write (regcache, reg, (const char *) writebuf + b); | |
289 | reg++; | |
290 | } | |
291 | return RETURN_VALUE_REGISTER_CONVENTION; | |
292 | } | |
293 | else | |
294 | return RETURN_VALUE_STRUCT_CONVENTION; | |
295 | } | |
296 | ||
297 | static enum return_value_convention | |
298 | hppa64_return_value (struct gdbarch *gdbarch, | |
299 | struct type *type, struct regcache *regcache, | |
300 | void *readbuf, const void *writebuf) | |
301 | { | |
302 | /* RM: Floats are returned in FR4R, doubles in FR4. Integral values | |
303 | are in r28, padded on the left. Aggregates less that 65 bits are | |
304 | in r28, right padded. Aggregates upto 128 bits are in r28 and | |
305 | r29, right padded. */ | |
306 | if (TYPE_CODE (type) == TYPE_CODE_FLT) | |
307 | { | |
308 | /* Floats are right aligned? */ | |
309 | int offset = register_size (gdbarch, FP4_REGNUM) - TYPE_LENGTH (type); | |
310 | if (readbuf != NULL) | |
311 | regcache_cooked_read_part (regcache, FP4_REGNUM, offset, | |
312 | TYPE_LENGTH (type), readbuf); | |
313 | if (writebuf != NULL) | |
314 | regcache_cooked_write_part (regcache, FP4_REGNUM, offset, | |
315 | TYPE_LENGTH (type), writebuf); | |
316 | return RETURN_VALUE_REGISTER_CONVENTION; | |
317 | } | |
318 | else if (TYPE_LENGTH (type) <= 8 && is_integral_type (type)) | |
319 | { | |
320 | /* Integrals are right aligned. */ | |
321 | int offset = register_size (gdbarch, FP4_REGNUM) - TYPE_LENGTH (type); | |
322 | if (readbuf != NULL) | |
323 | regcache_cooked_read_part (regcache, 28, offset, | |
324 | TYPE_LENGTH (type), readbuf); | |
325 | if (writebuf != NULL) | |
326 | regcache_cooked_write_part (regcache, 28, offset, | |
327 | TYPE_LENGTH (type), writebuf); | |
328 | return RETURN_VALUE_REGISTER_CONVENTION; | |
329 | } | |
330 | else if (TYPE_LENGTH (type) <= 2 * 8) | |
331 | { | |
332 | /* Composite values are left aligned. */ | |
333 | int b; | |
334 | for (b = 0; b < TYPE_LENGTH (type); b += 8) | |
335 | { | |
336 | int part = (TYPE_LENGTH (type) - b - 1) % 8 + 1; | |
337 | if (readbuf != NULL) | |
338 | regcache_cooked_read_part (regcache, 28, 0, part, | |
339 | (char *) readbuf + b); | |
340 | if (writebuf != NULL) | |
341 | regcache_cooked_write_part (regcache, 28, 0, part, | |
342 | (const char *) writebuf + b); | |
343 | } | |
344 | return RETURN_VALUE_REGISTER_CONVENTION; | |
345 | } | |
346 | else | |
347 | return RETURN_VALUE_STRUCT_CONVENTION; | |
348 | } | |
349 | ||
c906108c SS |
350 | /* Routines to extract various sized constants out of hppa |
351 | instructions. */ | |
352 | ||
353 | /* This assumes that no garbage lies outside of the lower bits of | |
354 | value. */ | |
355 | ||
356 | static int | |
fba45db2 | 357 | sign_extend (unsigned val, unsigned bits) |
c906108c | 358 | { |
c5aa993b | 359 | return (int) (val >> (bits - 1) ? (-1 << bits) | val : val); |
c906108c SS |
360 | } |
361 | ||
362 | /* For many immediate values the sign bit is the low bit! */ | |
363 | ||
364 | static int | |
fba45db2 | 365 | low_sign_extend (unsigned val, unsigned bits) |
c906108c | 366 | { |
c5aa993b | 367 | return (int) ((val & 0x1 ? (-1 << (bits - 1)) : 0) | val >> 1); |
c906108c SS |
368 | } |
369 | ||
e2ac8128 JB |
370 | /* Extract the bits at positions between FROM and TO, using HP's numbering |
371 | (MSB = 0). */ | |
372 | ||
373 | static int | |
374 | get_field (unsigned word, int from, int to) | |
375 | { | |
376 | return ((word) >> (31 - (to)) & ((1 << ((to) - (from) + 1)) - 1)); | |
377 | } | |
378 | ||
c906108c SS |
379 | /* extract the immediate field from a ld{bhw}s instruction */ |
380 | ||
c906108c | 381 | static int |
fba45db2 | 382 | extract_5_load (unsigned word) |
c906108c SS |
383 | { |
384 | return low_sign_extend (word >> 16 & MASK_5, 5); | |
385 | } | |
386 | ||
c906108c SS |
387 | /* extract the immediate field from a break instruction */ |
388 | ||
389 | static unsigned | |
fba45db2 | 390 | extract_5r_store (unsigned word) |
c906108c SS |
391 | { |
392 | return (word & MASK_5); | |
393 | } | |
394 | ||
395 | /* extract the immediate field from a {sr}sm instruction */ | |
396 | ||
397 | static unsigned | |
fba45db2 | 398 | extract_5R_store (unsigned word) |
c906108c SS |
399 | { |
400 | return (word >> 16 & MASK_5); | |
401 | } | |
402 | ||
c906108c SS |
403 | /* extract a 14 bit immediate field */ |
404 | ||
405 | static int | |
fba45db2 | 406 | extract_14 (unsigned word) |
c906108c SS |
407 | { |
408 | return low_sign_extend (word & MASK_14, 14); | |
409 | } | |
410 | ||
411 | /* deposit a 14 bit constant in a word */ | |
412 | ||
413 | static unsigned | |
fba45db2 | 414 | deposit_14 (int opnd, unsigned word) |
c906108c SS |
415 | { |
416 | unsigned sign = (opnd < 0 ? 1 : 0); | |
417 | ||
c5aa993b | 418 | return word | ((unsigned) opnd << 1 & MASK_14) | sign; |
c906108c SS |
419 | } |
420 | ||
421 | /* extract a 21 bit constant */ | |
422 | ||
423 | static int | |
fba45db2 | 424 | extract_21 (unsigned word) |
c906108c SS |
425 | { |
426 | int val; | |
427 | ||
428 | word &= MASK_21; | |
429 | word <<= 11; | |
e2ac8128 | 430 | val = get_field (word, 20, 20); |
c906108c | 431 | val <<= 11; |
e2ac8128 | 432 | val |= get_field (word, 9, 19); |
c906108c | 433 | val <<= 2; |
e2ac8128 | 434 | val |= get_field (word, 5, 6); |
c906108c | 435 | val <<= 5; |
e2ac8128 | 436 | val |= get_field (word, 0, 4); |
c906108c | 437 | val <<= 2; |
e2ac8128 | 438 | val |= get_field (word, 7, 8); |
c906108c SS |
439 | return sign_extend (val, 21) << 11; |
440 | } | |
441 | ||
442 | /* deposit a 21 bit constant in a word. Although 21 bit constants are | |
443 | usually the top 21 bits of a 32 bit constant, we assume that only | |
444 | the low 21 bits of opnd are relevant */ | |
445 | ||
446 | static unsigned | |
fba45db2 | 447 | deposit_21 (unsigned opnd, unsigned word) |
c906108c SS |
448 | { |
449 | unsigned val = 0; | |
450 | ||
e2ac8128 | 451 | val |= get_field (opnd, 11 + 14, 11 + 18); |
c906108c | 452 | val <<= 2; |
e2ac8128 | 453 | val |= get_field (opnd, 11 + 12, 11 + 13); |
c906108c | 454 | val <<= 2; |
e2ac8128 | 455 | val |= get_field (opnd, 11 + 19, 11 + 20); |
c906108c | 456 | val <<= 11; |
e2ac8128 | 457 | val |= get_field (opnd, 11 + 1, 11 + 11); |
c906108c | 458 | val <<= 1; |
e2ac8128 | 459 | val |= get_field (opnd, 11 + 0, 11 + 0); |
c906108c SS |
460 | return word | val; |
461 | } | |
462 | ||
c906108c SS |
463 | /* extract a 17 bit constant from branch instructions, returning the |
464 | 19 bit signed value. */ | |
465 | ||
466 | static int | |
fba45db2 | 467 | extract_17 (unsigned word) |
c906108c | 468 | { |
e2ac8128 JB |
469 | return sign_extend (get_field (word, 19, 28) | |
470 | get_field (word, 29, 29) << 10 | | |
471 | get_field (word, 11, 15) << 11 | | |
c906108c SS |
472 | (word & 0x1) << 16, 17) << 2; |
473 | } | |
474 | \f | |
475 | ||
476 | /* Compare the start address for two unwind entries returning 1 if | |
477 | the first address is larger than the second, -1 if the second is | |
478 | larger than the first, and zero if they are equal. */ | |
479 | ||
480 | static int | |
fba45db2 | 481 | compare_unwind_entries (const void *arg1, const void *arg2) |
c906108c SS |
482 | { |
483 | const struct unwind_table_entry *a = arg1; | |
484 | const struct unwind_table_entry *b = arg2; | |
485 | ||
486 | if (a->region_start > b->region_start) | |
487 | return 1; | |
488 | else if (a->region_start < b->region_start) | |
489 | return -1; | |
490 | else | |
491 | return 0; | |
492 | } | |
493 | ||
53a5351d JM |
494 | static CORE_ADDR low_text_segment_address; |
495 | ||
496 | static void | |
8fef05cc | 497 | record_text_segment_lowaddr (bfd *abfd, asection *section, void *ignored) |
53a5351d | 498 | { |
bf9c25dc | 499 | if (((section->flags & (SEC_ALLOC | SEC_LOAD | SEC_READONLY)) |
53a5351d JM |
500 | == (SEC_ALLOC | SEC_LOAD | SEC_READONLY)) |
501 | && section->vma < low_text_segment_address) | |
502 | low_text_segment_address = section->vma; | |
503 | } | |
504 | ||
c906108c | 505 | static void |
fba45db2 KB |
506 | internalize_unwinds (struct objfile *objfile, struct unwind_table_entry *table, |
507 | asection *section, unsigned int entries, unsigned int size, | |
508 | CORE_ADDR text_offset) | |
c906108c SS |
509 | { |
510 | /* We will read the unwind entries into temporary memory, then | |
511 | fill in the actual unwind table. */ | |
512 | if (size > 0) | |
513 | { | |
514 | unsigned long tmp; | |
515 | unsigned i; | |
516 | char *buf = alloca (size); | |
517 | ||
53a5351d JM |
518 | low_text_segment_address = -1; |
519 | ||
520 | /* If addresses are 64 bits wide, then unwinds are supposed to | |
c2c6d25f JM |
521 | be segment relative offsets instead of absolute addresses. |
522 | ||
523 | Note that when loading a shared library (text_offset != 0) the | |
524 | unwinds are already relative to the text_offset that will be | |
525 | passed in. */ | |
526 | if (TARGET_PTR_BIT == 64 && text_offset == 0) | |
53a5351d JM |
527 | { |
528 | bfd_map_over_sections (objfile->obfd, | |
4efb68b1 | 529 | record_text_segment_lowaddr, NULL); |
53a5351d JM |
530 | |
531 | /* ?!? Mask off some low bits. Should this instead subtract | |
532 | out the lowest section's filepos or something like that? | |
533 | This looks very hokey to me. */ | |
534 | low_text_segment_address &= ~0xfff; | |
535 | text_offset += low_text_segment_address; | |
536 | } | |
537 | ||
c906108c SS |
538 | bfd_get_section_contents (objfile->obfd, section, buf, 0, size); |
539 | ||
540 | /* Now internalize the information being careful to handle host/target | |
c5aa993b | 541 | endian issues. */ |
c906108c SS |
542 | for (i = 0; i < entries; i++) |
543 | { | |
544 | table[i].region_start = bfd_get_32 (objfile->obfd, | |
c5aa993b | 545 | (bfd_byte *) buf); |
c906108c SS |
546 | table[i].region_start += text_offset; |
547 | buf += 4; | |
c5aa993b | 548 | table[i].region_end = bfd_get_32 (objfile->obfd, (bfd_byte *) buf); |
c906108c SS |
549 | table[i].region_end += text_offset; |
550 | buf += 4; | |
c5aa993b | 551 | tmp = bfd_get_32 (objfile->obfd, (bfd_byte *) buf); |
c906108c SS |
552 | buf += 4; |
553 | table[i].Cannot_unwind = (tmp >> 31) & 0x1; | |
554 | table[i].Millicode = (tmp >> 30) & 0x1; | |
555 | table[i].Millicode_save_sr0 = (tmp >> 29) & 0x1; | |
556 | table[i].Region_description = (tmp >> 27) & 0x3; | |
557 | table[i].reserved1 = (tmp >> 26) & 0x1; | |
558 | table[i].Entry_SR = (tmp >> 25) & 0x1; | |
559 | table[i].Entry_FR = (tmp >> 21) & 0xf; | |
560 | table[i].Entry_GR = (tmp >> 16) & 0x1f; | |
561 | table[i].Args_stored = (tmp >> 15) & 0x1; | |
562 | table[i].Variable_Frame = (tmp >> 14) & 0x1; | |
563 | table[i].Separate_Package_Body = (tmp >> 13) & 0x1; | |
564 | table[i].Frame_Extension_Millicode = (tmp >> 12) & 0x1; | |
565 | table[i].Stack_Overflow_Check = (tmp >> 11) & 0x1; | |
566 | table[i].Two_Instruction_SP_Increment = (tmp >> 10) & 0x1; | |
567 | table[i].Ada_Region = (tmp >> 9) & 0x1; | |
568 | table[i].cxx_info = (tmp >> 8) & 0x1; | |
569 | table[i].cxx_try_catch = (tmp >> 7) & 0x1; | |
570 | table[i].sched_entry_seq = (tmp >> 6) & 0x1; | |
571 | table[i].reserved2 = (tmp >> 5) & 0x1; | |
572 | table[i].Save_SP = (tmp >> 4) & 0x1; | |
573 | table[i].Save_RP = (tmp >> 3) & 0x1; | |
574 | table[i].Save_MRP_in_frame = (tmp >> 2) & 0x1; | |
575 | table[i].extn_ptr_defined = (tmp >> 1) & 0x1; | |
576 | table[i].Cleanup_defined = tmp & 0x1; | |
c5aa993b | 577 | tmp = bfd_get_32 (objfile->obfd, (bfd_byte *) buf); |
c906108c SS |
578 | buf += 4; |
579 | table[i].MPE_XL_interrupt_marker = (tmp >> 31) & 0x1; | |
580 | table[i].HP_UX_interrupt_marker = (tmp >> 30) & 0x1; | |
581 | table[i].Large_frame = (tmp >> 29) & 0x1; | |
582 | table[i].Pseudo_SP_Set = (tmp >> 28) & 0x1; | |
583 | table[i].reserved4 = (tmp >> 27) & 0x1; | |
584 | table[i].Total_frame_size = tmp & 0x7ffffff; | |
585 | ||
c5aa993b | 586 | /* Stub unwinds are handled elsewhere. */ |
c906108c SS |
587 | table[i].stub_unwind.stub_type = 0; |
588 | table[i].stub_unwind.padding = 0; | |
589 | } | |
590 | } | |
591 | } | |
592 | ||
593 | /* Read in the backtrace information stored in the `$UNWIND_START$' section of | |
594 | the object file. This info is used mainly by find_unwind_entry() to find | |
595 | out the stack frame size and frame pointer used by procedures. We put | |
596 | everything on the psymbol obstack in the objfile so that it automatically | |
597 | gets freed when the objfile is destroyed. */ | |
598 | ||
599 | static void | |
fba45db2 | 600 | read_unwind_info (struct objfile *objfile) |
c906108c | 601 | { |
d4f3574e SS |
602 | asection *unwind_sec, *stub_unwind_sec; |
603 | unsigned unwind_size, stub_unwind_size, total_size; | |
604 | unsigned index, unwind_entries; | |
c906108c SS |
605 | unsigned stub_entries, total_entries; |
606 | CORE_ADDR text_offset; | |
607 | struct obj_unwind_info *ui; | |
608 | obj_private_data_t *obj_private; | |
609 | ||
610 | text_offset = ANOFFSET (objfile->section_offsets, 0); | |
8b92e4d5 | 611 | ui = (struct obj_unwind_info *) obstack_alloc (&objfile->objfile_obstack, |
c5aa993b | 612 | sizeof (struct obj_unwind_info)); |
c906108c SS |
613 | |
614 | ui->table = NULL; | |
615 | ui->cache = NULL; | |
616 | ui->last = -1; | |
617 | ||
d4f3574e SS |
618 | /* For reasons unknown the HP PA64 tools generate multiple unwinder |
619 | sections in a single executable. So we just iterate over every | |
620 | section in the BFD looking for unwinder sections intead of trying | |
621 | to do a lookup with bfd_get_section_by_name. | |
c906108c | 622 | |
d4f3574e SS |
623 | First determine the total size of the unwind tables so that we |
624 | can allocate memory in a nice big hunk. */ | |
625 | total_entries = 0; | |
626 | for (unwind_sec = objfile->obfd->sections; | |
627 | unwind_sec; | |
628 | unwind_sec = unwind_sec->next) | |
c906108c | 629 | { |
d4f3574e SS |
630 | if (strcmp (unwind_sec->name, "$UNWIND_START$") == 0 |
631 | || strcmp (unwind_sec->name, ".PARISC.unwind") == 0) | |
632 | { | |
633 | unwind_size = bfd_section_size (objfile->obfd, unwind_sec); | |
634 | unwind_entries = unwind_size / UNWIND_ENTRY_SIZE; | |
c906108c | 635 | |
d4f3574e SS |
636 | total_entries += unwind_entries; |
637 | } | |
c906108c SS |
638 | } |
639 | ||
d4f3574e SS |
640 | /* Now compute the size of the stub unwinds. Note the ELF tools do not |
641 | use stub unwinds at the curren time. */ | |
642 | stub_unwind_sec = bfd_get_section_by_name (objfile->obfd, "$UNWIND_END$"); | |
643 | ||
c906108c SS |
644 | if (stub_unwind_sec) |
645 | { | |
646 | stub_unwind_size = bfd_section_size (objfile->obfd, stub_unwind_sec); | |
647 | stub_entries = stub_unwind_size / STUB_UNWIND_ENTRY_SIZE; | |
648 | } | |
649 | else | |
650 | { | |
651 | stub_unwind_size = 0; | |
652 | stub_entries = 0; | |
653 | } | |
654 | ||
655 | /* Compute total number of unwind entries and their total size. */ | |
d4f3574e | 656 | total_entries += stub_entries; |
c906108c SS |
657 | total_size = total_entries * sizeof (struct unwind_table_entry); |
658 | ||
659 | /* Allocate memory for the unwind table. */ | |
660 | ui->table = (struct unwind_table_entry *) | |
8b92e4d5 | 661 | obstack_alloc (&objfile->objfile_obstack, total_size); |
c5aa993b | 662 | ui->last = total_entries - 1; |
c906108c | 663 | |
d4f3574e SS |
664 | /* Now read in each unwind section and internalize the standard unwind |
665 | entries. */ | |
c906108c | 666 | index = 0; |
d4f3574e SS |
667 | for (unwind_sec = objfile->obfd->sections; |
668 | unwind_sec; | |
669 | unwind_sec = unwind_sec->next) | |
670 | { | |
671 | if (strcmp (unwind_sec->name, "$UNWIND_START$") == 0 | |
672 | || strcmp (unwind_sec->name, ".PARISC.unwind") == 0) | |
673 | { | |
674 | unwind_size = bfd_section_size (objfile->obfd, unwind_sec); | |
675 | unwind_entries = unwind_size / UNWIND_ENTRY_SIZE; | |
676 | ||
677 | internalize_unwinds (objfile, &ui->table[index], unwind_sec, | |
678 | unwind_entries, unwind_size, text_offset); | |
679 | index += unwind_entries; | |
680 | } | |
681 | } | |
682 | ||
683 | /* Now read in and internalize the stub unwind entries. */ | |
c906108c SS |
684 | if (stub_unwind_size > 0) |
685 | { | |
686 | unsigned int i; | |
687 | char *buf = alloca (stub_unwind_size); | |
688 | ||
689 | /* Read in the stub unwind entries. */ | |
690 | bfd_get_section_contents (objfile->obfd, stub_unwind_sec, buf, | |
691 | 0, stub_unwind_size); | |
692 | ||
693 | /* Now convert them into regular unwind entries. */ | |
694 | for (i = 0; i < stub_entries; i++, index++) | |
695 | { | |
696 | /* Clear out the next unwind entry. */ | |
697 | memset (&ui->table[index], 0, sizeof (struct unwind_table_entry)); | |
698 | ||
699 | /* Convert offset & size into region_start and region_end. | |
700 | Stuff away the stub type into "reserved" fields. */ | |
701 | ui->table[index].region_start = bfd_get_32 (objfile->obfd, | |
702 | (bfd_byte *) buf); | |
703 | ui->table[index].region_start += text_offset; | |
704 | buf += 4; | |
705 | ui->table[index].stub_unwind.stub_type = bfd_get_8 (objfile->obfd, | |
c5aa993b | 706 | (bfd_byte *) buf); |
c906108c SS |
707 | buf += 2; |
708 | ui->table[index].region_end | |
c5aa993b JM |
709 | = ui->table[index].region_start + 4 * |
710 | (bfd_get_16 (objfile->obfd, (bfd_byte *) buf) - 1); | |
c906108c SS |
711 | buf += 2; |
712 | } | |
713 | ||
714 | } | |
715 | ||
716 | /* Unwind table needs to be kept sorted. */ | |
717 | qsort (ui->table, total_entries, sizeof (struct unwind_table_entry), | |
718 | compare_unwind_entries); | |
719 | ||
720 | /* Keep a pointer to the unwind information. */ | |
c5aa993b | 721 | if (objfile->obj_private == NULL) |
c906108c SS |
722 | { |
723 | obj_private = (obj_private_data_t *) | |
8b92e4d5 | 724 | obstack_alloc (&objfile->objfile_obstack, |
c5aa993b | 725 | sizeof (obj_private_data_t)); |
c906108c | 726 | obj_private->unwind_info = NULL; |
c5aa993b | 727 | obj_private->so_info = NULL; |
53a5351d | 728 | obj_private->dp = 0; |
c5aa993b | 729 | |
4efb68b1 | 730 | objfile->obj_private = obj_private; |
c906108c | 731 | } |
c5aa993b | 732 | obj_private = (obj_private_data_t *) objfile->obj_private; |
c906108c SS |
733 | obj_private->unwind_info = ui; |
734 | } | |
735 | ||
736 | /* Lookup the unwind (stack backtrace) info for the given PC. We search all | |
737 | of the objfiles seeking the unwind table entry for this PC. Each objfile | |
738 | contains a sorted list of struct unwind_table_entry. Since we do a binary | |
739 | search of the unwind tables, we depend upon them to be sorted. */ | |
740 | ||
741 | struct unwind_table_entry * | |
fba45db2 | 742 | find_unwind_entry (CORE_ADDR pc) |
c906108c SS |
743 | { |
744 | int first, middle, last; | |
745 | struct objfile *objfile; | |
746 | ||
747 | /* A function at address 0? Not in HP-UX! */ | |
748 | if (pc == (CORE_ADDR) 0) | |
749 | return NULL; | |
750 | ||
751 | ALL_OBJFILES (objfile) | |
c5aa993b JM |
752 | { |
753 | struct obj_unwind_info *ui; | |
754 | ui = NULL; | |
755 | if (objfile->obj_private) | |
756 | ui = ((obj_private_data_t *) (objfile->obj_private))->unwind_info; | |
c906108c | 757 | |
c5aa993b JM |
758 | if (!ui) |
759 | { | |
760 | read_unwind_info (objfile); | |
761 | if (objfile->obj_private == NULL) | |
104c1213 | 762 | error ("Internal error reading unwind information."); |
c5aa993b JM |
763 | ui = ((obj_private_data_t *) (objfile->obj_private))->unwind_info; |
764 | } | |
c906108c | 765 | |
c5aa993b | 766 | /* First, check the cache */ |
c906108c | 767 | |
c5aa993b JM |
768 | if (ui->cache |
769 | && pc >= ui->cache->region_start | |
770 | && pc <= ui->cache->region_end) | |
771 | return ui->cache; | |
c906108c | 772 | |
c5aa993b | 773 | /* Not in the cache, do a binary search */ |
c906108c | 774 | |
c5aa993b JM |
775 | first = 0; |
776 | last = ui->last; | |
c906108c | 777 | |
c5aa993b JM |
778 | while (first <= last) |
779 | { | |
780 | middle = (first + last) / 2; | |
781 | if (pc >= ui->table[middle].region_start | |
782 | && pc <= ui->table[middle].region_end) | |
783 | { | |
784 | ui->cache = &ui->table[middle]; | |
785 | return &ui->table[middle]; | |
786 | } | |
c906108c | 787 | |
c5aa993b JM |
788 | if (pc < ui->table[middle].region_start) |
789 | last = middle - 1; | |
790 | else | |
791 | first = middle + 1; | |
792 | } | |
793 | } /* ALL_OBJFILES() */ | |
c906108c SS |
794 | return NULL; |
795 | } | |
796 | ||
aaab4dba AC |
797 | const unsigned char * |
798 | hppa_breakpoint_from_pc (CORE_ADDR *pc, int *len) | |
799 | { | |
56132691 | 800 | static const unsigned char breakpoint[] = {0x00, 0x01, 0x00, 0x04}; |
aaab4dba AC |
801 | (*len) = sizeof (breakpoint); |
802 | return breakpoint; | |
803 | } | |
804 | ||
e23457df AC |
805 | /* Return the name of a register. */ |
806 | ||
807 | const char * | |
3ff7cf9e | 808 | hppa32_register_name (int i) |
e23457df AC |
809 | { |
810 | static char *names[] = { | |
811 | "flags", "r1", "rp", "r3", | |
812 | "r4", "r5", "r6", "r7", | |
813 | "r8", "r9", "r10", "r11", | |
814 | "r12", "r13", "r14", "r15", | |
815 | "r16", "r17", "r18", "r19", | |
816 | "r20", "r21", "r22", "r23", | |
817 | "r24", "r25", "r26", "dp", | |
818 | "ret0", "ret1", "sp", "r31", | |
819 | "sar", "pcoqh", "pcsqh", "pcoqt", | |
820 | "pcsqt", "eiem", "iir", "isr", | |
821 | "ior", "ipsw", "goto", "sr4", | |
822 | "sr0", "sr1", "sr2", "sr3", | |
823 | "sr5", "sr6", "sr7", "cr0", | |
824 | "cr8", "cr9", "ccr", "cr12", | |
825 | "cr13", "cr24", "cr25", "cr26", | |
826 | "mpsfu_high","mpsfu_low","mpsfu_ovflo","pad", | |
827 | "fpsr", "fpe1", "fpe2", "fpe3", | |
828 | "fpe4", "fpe5", "fpe6", "fpe7", | |
829 | "fr4", "fr4R", "fr5", "fr5R", | |
830 | "fr6", "fr6R", "fr7", "fr7R", | |
831 | "fr8", "fr8R", "fr9", "fr9R", | |
832 | "fr10", "fr10R", "fr11", "fr11R", | |
833 | "fr12", "fr12R", "fr13", "fr13R", | |
834 | "fr14", "fr14R", "fr15", "fr15R", | |
835 | "fr16", "fr16R", "fr17", "fr17R", | |
836 | "fr18", "fr18R", "fr19", "fr19R", | |
837 | "fr20", "fr20R", "fr21", "fr21R", | |
838 | "fr22", "fr22R", "fr23", "fr23R", | |
839 | "fr24", "fr24R", "fr25", "fr25R", | |
840 | "fr26", "fr26R", "fr27", "fr27R", | |
841 | "fr28", "fr28R", "fr29", "fr29R", | |
842 | "fr30", "fr30R", "fr31", "fr31R" | |
843 | }; | |
844 | if (i < 0 || i >= (sizeof (names) / sizeof (*names))) | |
845 | return NULL; | |
846 | else | |
847 | return names[i]; | |
848 | } | |
849 | ||
850 | const char * | |
851 | hppa64_register_name (int i) | |
852 | { | |
853 | static char *names[] = { | |
854 | "flags", "r1", "rp", "r3", | |
855 | "r4", "r5", "r6", "r7", | |
856 | "r8", "r9", "r10", "r11", | |
857 | "r12", "r13", "r14", "r15", | |
858 | "r16", "r17", "r18", "r19", | |
859 | "r20", "r21", "r22", "r23", | |
860 | "r24", "r25", "r26", "dp", | |
861 | "ret0", "ret1", "sp", "r31", | |
862 | "sar", "pcoqh", "pcsqh", "pcoqt", | |
863 | "pcsqt", "eiem", "iir", "isr", | |
864 | "ior", "ipsw", "goto", "sr4", | |
865 | "sr0", "sr1", "sr2", "sr3", | |
866 | "sr5", "sr6", "sr7", "cr0", | |
867 | "cr8", "cr9", "ccr", "cr12", | |
868 | "cr13", "cr24", "cr25", "cr26", | |
869 | "mpsfu_high","mpsfu_low","mpsfu_ovflo","pad", | |
870 | "fpsr", "fpe1", "fpe2", "fpe3", | |
871 | "fr4", "fr5", "fr6", "fr7", | |
872 | "fr8", "fr9", "fr10", "fr11", | |
873 | "fr12", "fr13", "fr14", "fr15", | |
874 | "fr16", "fr17", "fr18", "fr19", | |
875 | "fr20", "fr21", "fr22", "fr23", | |
876 | "fr24", "fr25", "fr26", "fr27", | |
877 | "fr28", "fr29", "fr30", "fr31" | |
878 | }; | |
879 | if (i < 0 || i >= (sizeof (names) / sizeof (*names))) | |
880 | return NULL; | |
881 | else | |
882 | return names[i]; | |
883 | } | |
884 | ||
885 | ||
886 | ||
c906108c SS |
887 | /* Return the adjustment necessary to make for addresses on the stack |
888 | as presented by hpread.c. | |
889 | ||
890 | This is necessary because of the stack direction on the PA and the | |
891 | bizarre way in which someone (?) decided they wanted to handle | |
892 | frame pointerless code in GDB. */ | |
893 | int | |
fba45db2 | 894 | hpread_adjust_stack_address (CORE_ADDR func_addr) |
c906108c SS |
895 | { |
896 | struct unwind_table_entry *u; | |
897 | ||
898 | u = find_unwind_entry (func_addr); | |
899 | if (!u) | |
900 | return 0; | |
901 | else | |
902 | return u->Total_frame_size << 3; | |
903 | } | |
904 | ||
905 | /* Called to determine if PC is in an interrupt handler of some | |
906 | kind. */ | |
907 | ||
908 | static int | |
fba45db2 | 909 | pc_in_interrupt_handler (CORE_ADDR pc) |
c906108c SS |
910 | { |
911 | struct unwind_table_entry *u; | |
912 | struct minimal_symbol *msym_us; | |
913 | ||
914 | u = find_unwind_entry (pc); | |
915 | if (!u) | |
916 | return 0; | |
917 | ||
918 | /* Oh joys. HPUX sets the interrupt bit for _sigreturn even though | |
919 | its frame isn't a pure interrupt frame. Deal with this. */ | |
920 | msym_us = lookup_minimal_symbol_by_pc (pc); | |
921 | ||
d7bd68ca | 922 | return (u->HP_UX_interrupt_marker |
22abf04a | 923 | && !PC_IN_SIGTRAMP (pc, DEPRECATED_SYMBOL_NAME (msym_us))); |
c906108c SS |
924 | } |
925 | ||
926 | /* Called when no unwind descriptor was found for PC. Returns 1 if it | |
104c1213 JM |
927 | appears that PC is in a linker stub. |
928 | ||
929 | ?!? Need to handle stubs which appear in PA64 code. */ | |
c906108c SS |
930 | |
931 | static int | |
fba45db2 | 932 | pc_in_linker_stub (CORE_ADDR pc) |
c906108c SS |
933 | { |
934 | int found_magic_instruction = 0; | |
935 | int i; | |
936 | char buf[4]; | |
937 | ||
938 | /* If unable to read memory, assume pc is not in a linker stub. */ | |
939 | if (target_read_memory (pc, buf, 4) != 0) | |
940 | return 0; | |
941 | ||
942 | /* We are looking for something like | |
943 | ||
944 | ; $$dyncall jams RP into this special spot in the frame (RP') | |
945 | ; before calling the "call stub" | |
946 | ldw -18(sp),rp | |
947 | ||
948 | ldsid (rp),r1 ; Get space associated with RP into r1 | |
949 | mtsp r1,sp ; Move it into space register 0 | |
950 | be,n 0(sr0),rp) ; back to your regularly scheduled program */ | |
951 | ||
952 | /* Maximum known linker stub size is 4 instructions. Search forward | |
953 | from the given PC, then backward. */ | |
954 | for (i = 0; i < 4; i++) | |
955 | { | |
956 | /* If we hit something with an unwind, stop searching this direction. */ | |
957 | ||
958 | if (find_unwind_entry (pc + i * 4) != 0) | |
959 | break; | |
960 | ||
961 | /* Check for ldsid (rp),r1 which is the magic instruction for a | |
c5aa993b | 962 | return from a cross-space function call. */ |
c906108c SS |
963 | if (read_memory_integer (pc + i * 4, 4) == 0x004010a1) |
964 | { | |
965 | found_magic_instruction = 1; | |
966 | break; | |
967 | } | |
968 | /* Add code to handle long call/branch and argument relocation stubs | |
c5aa993b | 969 | here. */ |
c906108c SS |
970 | } |
971 | ||
972 | if (found_magic_instruction != 0) | |
973 | return 1; | |
974 | ||
975 | /* Now look backward. */ | |
976 | for (i = 0; i < 4; i++) | |
977 | { | |
978 | /* If we hit something with an unwind, stop searching this direction. */ | |
979 | ||
980 | if (find_unwind_entry (pc - i * 4) != 0) | |
981 | break; | |
982 | ||
983 | /* Check for ldsid (rp),r1 which is the magic instruction for a | |
c5aa993b | 984 | return from a cross-space function call. */ |
c906108c SS |
985 | if (read_memory_integer (pc - i * 4, 4) == 0x004010a1) |
986 | { | |
987 | found_magic_instruction = 1; | |
988 | break; | |
989 | } | |
990 | /* Add code to handle long call/branch and argument relocation stubs | |
c5aa993b | 991 | here. */ |
c906108c SS |
992 | } |
993 | return found_magic_instruction; | |
994 | } | |
995 | ||
996 | static int | |
fba45db2 | 997 | find_return_regnum (CORE_ADDR pc) |
c906108c SS |
998 | { |
999 | struct unwind_table_entry *u; | |
1000 | ||
1001 | u = find_unwind_entry (pc); | |
1002 | ||
1003 | if (!u) | |
1004 | return RP_REGNUM; | |
1005 | ||
1006 | if (u->Millicode) | |
1007 | return 31; | |
1008 | ||
1009 | return RP_REGNUM; | |
1010 | } | |
1011 | ||
1012 | /* Return size of frame, or -1 if we should use a frame pointer. */ | |
1013 | static int | |
fba45db2 | 1014 | find_proc_framesize (CORE_ADDR pc) |
c906108c SS |
1015 | { |
1016 | struct unwind_table_entry *u; | |
1017 | struct minimal_symbol *msym_us; | |
1018 | ||
1019 | /* This may indicate a bug in our callers... */ | |
c5aa993b | 1020 | if (pc == (CORE_ADDR) 0) |
c906108c | 1021 | return -1; |
c5aa993b | 1022 | |
c906108c SS |
1023 | u = find_unwind_entry (pc); |
1024 | ||
1025 | if (!u) | |
1026 | { | |
1027 | if (pc_in_linker_stub (pc)) | |
1028 | /* Linker stubs have a zero size frame. */ | |
1029 | return 0; | |
1030 | else | |
1031 | return -1; | |
1032 | } | |
1033 | ||
1034 | msym_us = lookup_minimal_symbol_by_pc (pc); | |
1035 | ||
1036 | /* If Save_SP is set, and we're not in an interrupt or signal caller, | |
1037 | then we have a frame pointer. Use it. */ | |
3fa41cdb JL |
1038 | if (u->Save_SP |
1039 | && !pc_in_interrupt_handler (pc) | |
1040 | && msym_us | |
22abf04a | 1041 | && !PC_IN_SIGTRAMP (pc, DEPRECATED_SYMBOL_NAME (msym_us))) |
c906108c SS |
1042 | return -1; |
1043 | ||
1044 | return u->Total_frame_size << 3; | |
1045 | } | |
1046 | ||
1047 | /* Return offset from sp at which rp is saved, or 0 if not saved. */ | |
a14ed312 | 1048 | static int rp_saved (CORE_ADDR); |
c906108c SS |
1049 | |
1050 | static int | |
fba45db2 | 1051 | rp_saved (CORE_ADDR pc) |
c906108c SS |
1052 | { |
1053 | struct unwind_table_entry *u; | |
1054 | ||
1055 | /* A function at, and thus a return PC from, address 0? Not in HP-UX! */ | |
1056 | if (pc == (CORE_ADDR) 0) | |
1057 | return 0; | |
1058 | ||
1059 | u = find_unwind_entry (pc); | |
1060 | ||
1061 | if (!u) | |
1062 | { | |
1063 | if (pc_in_linker_stub (pc)) | |
1064 | /* This is the so-called RP'. */ | |
1065 | return -24; | |
1066 | else | |
1067 | return 0; | |
1068 | } | |
1069 | ||
1070 | if (u->Save_RP) | |
53a5351d | 1071 | return (TARGET_PTR_BIT == 64 ? -16 : -20); |
c906108c SS |
1072 | else if (u->stub_unwind.stub_type != 0) |
1073 | { | |
1074 | switch (u->stub_unwind.stub_type) | |
1075 | { | |
1076 | case EXPORT: | |
1077 | case IMPORT: | |
1078 | return -24; | |
1079 | case PARAMETER_RELOCATION: | |
1080 | return -8; | |
1081 | default: | |
1082 | return 0; | |
1083 | } | |
1084 | } | |
1085 | else | |
1086 | return 0; | |
1087 | } | |
1088 | \f | |
1089 | int | |
60383d10 | 1090 | hppa_frameless_function_invocation (struct frame_info *frame) |
c906108c SS |
1091 | { |
1092 | struct unwind_table_entry *u; | |
1093 | ||
ef6e7e13 | 1094 | u = find_unwind_entry (get_frame_pc (frame)); |
c906108c SS |
1095 | |
1096 | if (u == 0) | |
1097 | return 0; | |
1098 | ||
1099 | return (u->Total_frame_size == 0 && u->stub_unwind.stub_type == 0); | |
1100 | } | |
1101 | ||
d709c020 JB |
1102 | /* Immediately after a function call, return the saved pc. |
1103 | Can't go through the frames for this because on some machines | |
1104 | the new frame is not set up until the new function executes | |
1105 | some instructions. */ | |
1106 | ||
c906108c | 1107 | CORE_ADDR |
60383d10 | 1108 | hppa_saved_pc_after_call (struct frame_info *frame) |
c906108c SS |
1109 | { |
1110 | int ret_regnum; | |
1111 | CORE_ADDR pc; | |
1112 | struct unwind_table_entry *u; | |
1113 | ||
1114 | ret_regnum = find_return_regnum (get_frame_pc (frame)); | |
1115 | pc = read_register (ret_regnum) & ~0x3; | |
c5aa993b | 1116 | |
c906108c SS |
1117 | /* If PC is in a linker stub, then we need to dig the address |
1118 | the stub will return to out of the stack. */ | |
1119 | u = find_unwind_entry (pc); | |
1120 | if (u && u->stub_unwind.stub_type != 0) | |
8bedc050 | 1121 | return DEPRECATED_FRAME_SAVED_PC (frame); |
c906108c SS |
1122 | else |
1123 | return pc; | |
1124 | } | |
1125 | \f | |
1126 | CORE_ADDR | |
fba45db2 | 1127 | hppa_frame_saved_pc (struct frame_info *frame) |
c906108c SS |
1128 | { |
1129 | CORE_ADDR pc = get_frame_pc (frame); | |
1130 | struct unwind_table_entry *u; | |
65e82032 | 1131 | CORE_ADDR old_pc = 0; |
c5aa993b JM |
1132 | int spun_around_loop = 0; |
1133 | int rp_offset = 0; | |
c906108c SS |
1134 | |
1135 | /* BSD, HPUX & OSF1 all lay out the hardware state in the same manner | |
1136 | at the base of the frame in an interrupt handler. Registers within | |
1137 | are saved in the exact same order as GDB numbers registers. How | |
1138 | convienent. */ | |
1139 | if (pc_in_interrupt_handler (pc)) | |
ef6e7e13 | 1140 | return read_memory_integer (get_frame_base (frame) + PC_REGNUM * 4, |
53a5351d | 1141 | TARGET_PTR_BIT / 8) & ~0x3; |
c906108c | 1142 | |
ef6e7e13 AC |
1143 | if ((get_frame_pc (frame) >= get_frame_base (frame) |
1144 | && (get_frame_pc (frame) | |
1145 | <= (get_frame_base (frame) | |
1146 | /* A call dummy is sized in words, but it is actually a | |
1147 | series of instructions. Account for that scaling | |
1148 | factor. */ | |
b1e29e33 AC |
1149 | + ((DEPRECATED_REGISTER_SIZE / INSTRUCTION_SIZE) |
1150 | * DEPRECATED_CALL_DUMMY_LENGTH) | |
ef6e7e13 AC |
1151 | /* Similarly we have to account for 64bit wide register |
1152 | saves. */ | |
b1e29e33 | 1153 | + (32 * DEPRECATED_REGISTER_SIZE) |
ef6e7e13 AC |
1154 | /* We always consider FP regs 8 bytes long. */ |
1155 | + (NUM_REGS - FP0_REGNUM) * 8 | |
1156 | /* Similarly we have to account for 64bit wide register | |
1157 | saves. */ | |
b1e29e33 | 1158 | + (6 * DEPRECATED_REGISTER_SIZE))))) |
104c1213 | 1159 | { |
ef6e7e13 | 1160 | return read_memory_integer ((get_frame_base (frame) |
104c1213 JM |
1161 | + (TARGET_PTR_BIT == 64 ? -16 : -20)), |
1162 | TARGET_PTR_BIT / 8) & ~0x3; | |
1163 | } | |
1164 | ||
c906108c SS |
1165 | #ifdef FRAME_SAVED_PC_IN_SIGTRAMP |
1166 | /* Deal with signal handler caller frames too. */ | |
5a203e44 | 1167 | if ((get_frame_type (frame) == SIGTRAMP_FRAME)) |
c906108c SS |
1168 | { |
1169 | CORE_ADDR rp; | |
1170 | FRAME_SAVED_PC_IN_SIGTRAMP (frame, &rp); | |
1171 | return rp & ~0x3; | |
1172 | } | |
1173 | #endif | |
1174 | ||
60383d10 | 1175 | if (hppa_frameless_function_invocation (frame)) |
c906108c SS |
1176 | { |
1177 | int ret_regnum; | |
1178 | ||
1179 | ret_regnum = find_return_regnum (pc); | |
1180 | ||
1181 | /* If the next frame is an interrupt frame or a signal | |
c5aa993b JM |
1182 | handler caller, then we need to look in the saved |
1183 | register area to get the return pointer (the values | |
1184 | in the registers may not correspond to anything useful). */ | |
ef6e7e13 AC |
1185 | if (get_next_frame (frame) |
1186 | && ((get_frame_type (get_next_frame (frame)) == SIGTRAMP_FRAME) | |
1187 | || pc_in_interrupt_handler (get_frame_pc (get_next_frame (frame))))) | |
c906108c | 1188 | { |
43bd9a9e | 1189 | CORE_ADDR *saved_regs; |
ef6e7e13 | 1190 | hppa_frame_init_saved_regs (get_next_frame (frame)); |
1b1d3794 | 1191 | saved_regs = deprecated_get_frame_saved_regs (get_next_frame (frame)); |
43bd9a9e | 1192 | if (read_memory_integer (saved_regs[FLAGS_REGNUM], |
53a5351d | 1193 | TARGET_PTR_BIT / 8) & 0x2) |
c906108c | 1194 | { |
43bd9a9e | 1195 | pc = read_memory_integer (saved_regs[31], |
53a5351d | 1196 | TARGET_PTR_BIT / 8) & ~0x3; |
c906108c SS |
1197 | |
1198 | /* Syscalls are really two frames. The syscall stub itself | |
c5aa993b JM |
1199 | with a return pointer in %rp and the kernel call with |
1200 | a return pointer in %r31. We return the %rp variant | |
1201 | if %r31 is the same as frame->pc. */ | |
ef6e7e13 | 1202 | if (pc == get_frame_pc (frame)) |
43bd9a9e | 1203 | pc = read_memory_integer (saved_regs[RP_REGNUM], |
53a5351d | 1204 | TARGET_PTR_BIT / 8) & ~0x3; |
c906108c SS |
1205 | } |
1206 | else | |
43bd9a9e | 1207 | pc = read_memory_integer (saved_regs[RP_REGNUM], |
53a5351d | 1208 | TARGET_PTR_BIT / 8) & ~0x3; |
c906108c SS |
1209 | } |
1210 | else | |
1211 | pc = read_register (ret_regnum) & ~0x3; | |
1212 | } | |
1213 | else | |
1214 | { | |
1215 | spun_around_loop = 0; | |
c5aa993b | 1216 | old_pc = pc; |
c906108c | 1217 | |
c5aa993b | 1218 | restart: |
c906108c SS |
1219 | rp_offset = rp_saved (pc); |
1220 | ||
1221 | /* Similar to code in frameless function case. If the next | |
c5aa993b JM |
1222 | frame is a signal or interrupt handler, then dig the right |
1223 | information out of the saved register info. */ | |
c906108c | 1224 | if (rp_offset == 0 |
ef6e7e13 AC |
1225 | && get_next_frame (frame) |
1226 | && ((get_frame_type (get_next_frame (frame)) == SIGTRAMP_FRAME) | |
1227 | || pc_in_interrupt_handler (get_frame_pc (get_next_frame (frame))))) | |
c906108c | 1228 | { |
43bd9a9e | 1229 | CORE_ADDR *saved_regs; |
ef6e7e13 | 1230 | hppa_frame_init_saved_regs (get_next_frame (frame)); |
1b1d3794 | 1231 | saved_regs = deprecated_get_frame_saved_regs (get_next_frame (frame)); |
43bd9a9e | 1232 | if (read_memory_integer (saved_regs[FLAGS_REGNUM], |
53a5351d | 1233 | TARGET_PTR_BIT / 8) & 0x2) |
c906108c | 1234 | { |
43bd9a9e | 1235 | pc = read_memory_integer (saved_regs[31], |
53a5351d | 1236 | TARGET_PTR_BIT / 8) & ~0x3; |
c906108c SS |
1237 | |
1238 | /* Syscalls are really two frames. The syscall stub itself | |
c5aa993b JM |
1239 | with a return pointer in %rp and the kernel call with |
1240 | a return pointer in %r31. We return the %rp variant | |
1241 | if %r31 is the same as frame->pc. */ | |
ef6e7e13 | 1242 | if (pc == get_frame_pc (frame)) |
43bd9a9e | 1243 | pc = read_memory_integer (saved_regs[RP_REGNUM], |
53a5351d | 1244 | TARGET_PTR_BIT / 8) & ~0x3; |
c906108c SS |
1245 | } |
1246 | else | |
43bd9a9e | 1247 | pc = read_memory_integer (saved_regs[RP_REGNUM], |
53a5351d | 1248 | TARGET_PTR_BIT / 8) & ~0x3; |
c906108c SS |
1249 | } |
1250 | else if (rp_offset == 0) | |
c5aa993b JM |
1251 | { |
1252 | old_pc = pc; | |
1253 | pc = read_register (RP_REGNUM) & ~0x3; | |
1254 | } | |
c906108c | 1255 | else |
c5aa993b JM |
1256 | { |
1257 | old_pc = pc; | |
ef6e7e13 | 1258 | pc = read_memory_integer (get_frame_base (frame) + rp_offset, |
53a5351d | 1259 | TARGET_PTR_BIT / 8) & ~0x3; |
c5aa993b | 1260 | } |
c906108c SS |
1261 | } |
1262 | ||
1263 | /* If PC is inside a linker stub, then dig out the address the stub | |
1264 | will return to. | |
1265 | ||
1266 | Don't do this for long branch stubs. Why? For some unknown reason | |
1267 | _start is marked as a long branch stub in hpux10. */ | |
1268 | u = find_unwind_entry (pc); | |
1269 | if (u && u->stub_unwind.stub_type != 0 | |
1270 | && u->stub_unwind.stub_type != LONG_BRANCH) | |
1271 | { | |
1272 | unsigned int insn; | |
1273 | ||
1274 | /* If this is a dynamic executable, and we're in a signal handler, | |
c5aa993b JM |
1275 | then the call chain will eventually point us into the stub for |
1276 | _sigreturn. Unlike most cases, we'll be pointed to the branch | |
1277 | to the real sigreturn rather than the code after the real branch!. | |
c906108c | 1278 | |
c5aa993b JM |
1279 | Else, try to dig the address the stub will return to in the normal |
1280 | fashion. */ | |
c906108c SS |
1281 | insn = read_memory_integer (pc, 4); |
1282 | if ((insn & 0xfc00e000) == 0xe8000000) | |
1283 | return (pc + extract_17 (insn) + 8) & ~0x3; | |
1284 | else | |
1285 | { | |
c5aa993b JM |
1286 | if (old_pc == pc) |
1287 | spun_around_loop++; | |
1288 | ||
1289 | if (spun_around_loop > 1) | |
1290 | { | |
1291 | /* We're just about to go around the loop again with | |
1292 | no more hope of success. Die. */ | |
1293 | error ("Unable to find return pc for this frame"); | |
1294 | } | |
1295 | else | |
1296 | goto restart; | |
c906108c SS |
1297 | } |
1298 | } | |
1299 | ||
1300 | return pc; | |
1301 | } | |
1302 | \f | |
1303 | /* We need to correct the PC and the FP for the outermost frame when we are | |
1304 | in a system call. */ | |
1305 | ||
1306 | void | |
60383d10 | 1307 | hppa_init_extra_frame_info (int fromleaf, struct frame_info *frame) |
c906108c SS |
1308 | { |
1309 | int flags; | |
1310 | int framesize; | |
1311 | ||
ef6e7e13 | 1312 | if (get_next_frame (frame) && !fromleaf) |
c906108c SS |
1313 | return; |
1314 | ||
618ce49f AC |
1315 | /* If the next frame represents a frameless function invocation then |
1316 | we have to do some adjustments that are normally done by | |
1317 | DEPRECATED_FRAME_CHAIN. (DEPRECATED_FRAME_CHAIN is not called in | |
1318 | this case.) */ | |
c906108c SS |
1319 | if (fromleaf) |
1320 | { | |
1321 | /* Find the framesize of *this* frame without peeking at the PC | |
c5aa993b | 1322 | in the current frame structure (it isn't set yet). */ |
8bedc050 | 1323 | framesize = find_proc_framesize (DEPRECATED_FRAME_SAVED_PC (get_next_frame (frame))); |
c906108c SS |
1324 | |
1325 | /* Now adjust our base frame accordingly. If we have a frame pointer | |
c5aa993b JM |
1326 | use it, else subtract the size of this frame from the current |
1327 | frame. (we always want frame->frame to point at the lowest address | |
1328 | in the frame). */ | |
c906108c | 1329 | if (framesize == -1) |
0ba6dca9 | 1330 | deprecated_update_frame_base_hack (frame, deprecated_read_fp ()); |
c906108c | 1331 | else |
ef6e7e13 | 1332 | deprecated_update_frame_base_hack (frame, get_frame_base (frame) - framesize); |
c906108c SS |
1333 | return; |
1334 | } | |
1335 | ||
1336 | flags = read_register (FLAGS_REGNUM); | |
c5aa993b | 1337 | if (flags & 2) /* In system call? */ |
ef6e7e13 | 1338 | deprecated_update_frame_pc_hack (frame, read_register (31) & ~0x3); |
c906108c SS |
1339 | |
1340 | /* The outermost frame is always derived from PC-framesize | |
1341 | ||
1342 | One might think frameless innermost frames should have | |
1343 | a frame->frame that is the same as the parent's frame->frame. | |
1344 | That is wrong; frame->frame in that case should be the *high* | |
1345 | address of the parent's frame. It's complicated as hell to | |
1346 | explain, but the parent *always* creates some stack space for | |
1347 | the child. So the child actually does have a frame of some | |
1348 | sorts, and its base is the high address in its parent's frame. */ | |
ef6e7e13 | 1349 | framesize = find_proc_framesize (get_frame_pc (frame)); |
c906108c | 1350 | if (framesize == -1) |
0ba6dca9 | 1351 | deprecated_update_frame_base_hack (frame, deprecated_read_fp ()); |
c906108c | 1352 | else |
ef6e7e13 | 1353 | deprecated_update_frame_base_hack (frame, read_register (SP_REGNUM) - framesize); |
c906108c SS |
1354 | } |
1355 | \f | |
a5afb99f AC |
1356 | /* Given a GDB frame, determine the address of the calling function's |
1357 | frame. This will be used to create a new GDB frame struct, and | |
e9582e71 AC |
1358 | then DEPRECATED_INIT_EXTRA_FRAME_INFO and DEPRECATED_INIT_FRAME_PC |
1359 | will be called for the new frame. | |
c906108c SS |
1360 | |
1361 | This may involve searching through prologues for several functions | |
1362 | at boundaries where GCC calls HP C code, or where code which has | |
1363 | a frame pointer calls code without a frame pointer. */ | |
1364 | ||
1365 | CORE_ADDR | |
60383d10 | 1366 | hppa_frame_chain (struct frame_info *frame) |
c906108c SS |
1367 | { |
1368 | int my_framesize, caller_framesize; | |
1369 | struct unwind_table_entry *u; | |
1370 | CORE_ADDR frame_base; | |
1371 | struct frame_info *tmp_frame; | |
1372 | ||
c2c6d25f JM |
1373 | /* A frame in the current frame list, or zero. */ |
1374 | struct frame_info *saved_regs_frame = 0; | |
43bd9a9e AC |
1375 | /* Where the registers were saved in saved_regs_frame. If |
1376 | saved_regs_frame is zero, this is garbage. */ | |
1377 | CORE_ADDR *saved_regs = NULL; | |
c2c6d25f | 1378 | |
c5aa993b | 1379 | CORE_ADDR caller_pc; |
c906108c SS |
1380 | |
1381 | struct minimal_symbol *min_frame_symbol; | |
c5aa993b JM |
1382 | struct symbol *frame_symbol; |
1383 | char *frame_symbol_name; | |
c906108c SS |
1384 | |
1385 | /* If this is a threaded application, and we see the | |
1386 | routine "__pthread_exit", treat it as the stack root | |
1387 | for this thread. */ | |
ef6e7e13 AC |
1388 | min_frame_symbol = lookup_minimal_symbol_by_pc (get_frame_pc (frame)); |
1389 | frame_symbol = find_pc_function (get_frame_pc (frame)); | |
c906108c | 1390 | |
c5aa993b | 1391 | if ((min_frame_symbol != 0) /* && (frame_symbol == 0) */ ) |
c906108c | 1392 | { |
c5aa993b JM |
1393 | /* The test above for "no user function name" would defend |
1394 | against the slim likelihood that a user might define a | |
1395 | routine named "__pthread_exit" and then try to debug it. | |
1396 | ||
1397 | If it weren't commented out, and you tried to debug the | |
1398 | pthread library itself, you'd get errors. | |
1399 | ||
1400 | So for today, we don't make that check. */ | |
22abf04a | 1401 | frame_symbol_name = DEPRECATED_SYMBOL_NAME (min_frame_symbol); |
c5aa993b JM |
1402 | if (frame_symbol_name != 0) |
1403 | { | |
1404 | if (0 == strncmp (frame_symbol_name, | |
1405 | THREAD_INITIAL_FRAME_SYMBOL, | |
1406 | THREAD_INITIAL_FRAME_SYM_LEN)) | |
1407 | { | |
1408 | /* Pretend we've reached the bottom of the stack. */ | |
1409 | return (CORE_ADDR) 0; | |
1410 | } | |
1411 | } | |
1412 | } /* End of hacky code for threads. */ | |
1413 | ||
c906108c SS |
1414 | /* Handle HPUX, BSD, and OSF1 style interrupt frames first. These |
1415 | are easy; at *sp we have a full save state strucutre which we can | |
1416 | pull the old stack pointer from. Also see frame_saved_pc for | |
1417 | code to dig a saved PC out of the save state structure. */ | |
ef6e7e13 AC |
1418 | if (pc_in_interrupt_handler (get_frame_pc (frame))) |
1419 | frame_base = read_memory_integer (get_frame_base (frame) + SP_REGNUM * 4, | |
53a5351d | 1420 | TARGET_PTR_BIT / 8); |
c906108c | 1421 | #ifdef FRAME_BASE_BEFORE_SIGTRAMP |
5a203e44 | 1422 | else if ((get_frame_type (frame) == SIGTRAMP_FRAME)) |
c906108c SS |
1423 | { |
1424 | FRAME_BASE_BEFORE_SIGTRAMP (frame, &frame_base); | |
1425 | } | |
1426 | #endif | |
1427 | else | |
ef6e7e13 | 1428 | frame_base = get_frame_base (frame); |
c906108c SS |
1429 | |
1430 | /* Get frame sizes for the current frame and the frame of the | |
1431 | caller. */ | |
ef6e7e13 | 1432 | my_framesize = find_proc_framesize (get_frame_pc (frame)); |
8bedc050 | 1433 | caller_pc = DEPRECATED_FRAME_SAVED_PC (frame); |
c906108c SS |
1434 | |
1435 | /* If we can't determine the caller's PC, then it's not likely we can | |
1436 | really determine anything meaningful about its frame. We'll consider | |
1437 | this to be stack bottom. */ | |
1438 | if (caller_pc == (CORE_ADDR) 0) | |
1439 | return (CORE_ADDR) 0; | |
1440 | ||
8bedc050 | 1441 | caller_framesize = find_proc_framesize (DEPRECATED_FRAME_SAVED_PC (frame)); |
c906108c SS |
1442 | |
1443 | /* If caller does not have a frame pointer, then its frame | |
1444 | can be found at current_frame - caller_framesize. */ | |
1445 | if (caller_framesize != -1) | |
1446 | { | |
1447 | return frame_base - caller_framesize; | |
1448 | } | |
1449 | /* Both caller and callee have frame pointers and are GCC compiled | |
1450 | (SAVE_SP bit in unwind descriptor is on for both functions. | |
1451 | The previous frame pointer is found at the top of the current frame. */ | |
1452 | if (caller_framesize == -1 && my_framesize == -1) | |
1453 | { | |
53a5351d | 1454 | return read_memory_integer (frame_base, TARGET_PTR_BIT / 8); |
c906108c SS |
1455 | } |
1456 | /* Caller has a frame pointer, but callee does not. This is a little | |
1457 | more difficult as GCC and HP C lay out locals and callee register save | |
1458 | areas very differently. | |
1459 | ||
1460 | The previous frame pointer could be in a register, or in one of | |
1461 | several areas on the stack. | |
1462 | ||
1463 | Walk from the current frame to the innermost frame examining | |
1464 | unwind descriptors to determine if %r3 ever gets saved into the | |
1465 | stack. If so return whatever value got saved into the stack. | |
1466 | If it was never saved in the stack, then the value in %r3 is still | |
1467 | valid, so use it. | |
1468 | ||
1469 | We use information from unwind descriptors to determine if %r3 | |
1470 | is saved into the stack (Entry_GR field has this information). */ | |
1471 | ||
ef6e7e13 | 1472 | for (tmp_frame = frame; tmp_frame; tmp_frame = get_next_frame (tmp_frame)) |
c906108c | 1473 | { |
ef6e7e13 | 1474 | u = find_unwind_entry (get_frame_pc (tmp_frame)); |
c906108c SS |
1475 | |
1476 | if (!u) | |
1477 | { | |
1478 | /* We could find this information by examining prologues. I don't | |
1479 | think anyone has actually written any tools (not even "strip") | |
1480 | which leave them out of an executable, so maybe this is a moot | |
1481 | point. */ | |
c5aa993b JM |
1482 | /* ??rehrauer: Actually, it's quite possible to stepi your way into |
1483 | code that doesn't have unwind entries. For example, stepping into | |
1484 | the dynamic linker will give you a PC that has none. Thus, I've | |
1485 | disabled this warning. */ | |
c906108c | 1486 | #if 0 |
ef6e7e13 | 1487 | warning ("Unable to find unwind for PC 0x%x -- Help!", get_frame_pc (tmp_frame)); |
c906108c SS |
1488 | #endif |
1489 | return (CORE_ADDR) 0; | |
1490 | } | |
1491 | ||
c2c6d25f | 1492 | if (u->Save_SP |
5a203e44 | 1493 | || (get_frame_type (tmp_frame) == SIGTRAMP_FRAME) |
ef6e7e13 | 1494 | || pc_in_interrupt_handler (get_frame_pc (tmp_frame))) |
c906108c | 1495 | break; |
c2c6d25f JM |
1496 | |
1497 | /* Entry_GR specifies the number of callee-saved general registers | |
1498 | saved in the stack. It starts at %r3, so %r3 would be 1. */ | |
1499 | if (u->Entry_GR >= 1) | |
1500 | { | |
1501 | /* The unwind entry claims that r3 is saved here. However, | |
1502 | in optimized code, GCC often doesn't actually save r3. | |
1503 | We'll discover this if we look at the prologue. */ | |
43bd9a9e | 1504 | hppa_frame_init_saved_regs (tmp_frame); |
1b1d3794 | 1505 | saved_regs = deprecated_get_frame_saved_regs (tmp_frame); |
c2c6d25f JM |
1506 | saved_regs_frame = tmp_frame; |
1507 | ||
1508 | /* If we have an address for r3, that's good. */ | |
0ba6dca9 | 1509 | if (saved_regs[DEPRECATED_FP_REGNUM]) |
c2c6d25f JM |
1510 | break; |
1511 | } | |
c906108c SS |
1512 | } |
1513 | ||
1514 | if (tmp_frame) | |
1515 | { | |
1516 | /* We may have walked down the chain into a function with a frame | |
c5aa993b | 1517 | pointer. */ |
c906108c | 1518 | if (u->Save_SP |
5a203e44 | 1519 | && !(get_frame_type (tmp_frame) == SIGTRAMP_FRAME) |
ef6e7e13 | 1520 | && !pc_in_interrupt_handler (get_frame_pc (tmp_frame))) |
c906108c | 1521 | { |
ef6e7e13 | 1522 | return read_memory_integer (get_frame_base (tmp_frame), TARGET_PTR_BIT / 8); |
c906108c SS |
1523 | } |
1524 | /* %r3 was saved somewhere in the stack. Dig it out. */ | |
c5aa993b | 1525 | else |
c906108c | 1526 | { |
c906108c SS |
1527 | /* Sick. |
1528 | ||
1529 | For optimization purposes many kernels don't have the | |
1530 | callee saved registers into the save_state structure upon | |
1531 | entry into the kernel for a syscall; the optimization | |
1532 | is usually turned off if the process is being traced so | |
1533 | that the debugger can get full register state for the | |
1534 | process. | |
c5aa993b | 1535 | |
c906108c SS |
1536 | This scheme works well except for two cases: |
1537 | ||
c5aa993b JM |
1538 | * Attaching to a process when the process is in the |
1539 | kernel performing a system call (debugger can't get | |
1540 | full register state for the inferior process since | |
1541 | the process wasn't being traced when it entered the | |
1542 | system call). | |
c906108c | 1543 | |
c5aa993b JM |
1544 | * Register state is not complete if the system call |
1545 | causes the process to core dump. | |
c906108c SS |
1546 | |
1547 | ||
1548 | The following heinous code is an attempt to deal with | |
1549 | the lack of register state in a core dump. It will | |
1550 | fail miserably if the function which performs the | |
1551 | system call has a variable sized stack frame. */ | |
1552 | ||
c2c6d25f | 1553 | if (tmp_frame != saved_regs_frame) |
43bd9a9e AC |
1554 | { |
1555 | hppa_frame_init_saved_regs (tmp_frame); | |
1b1d3794 | 1556 | saved_regs = deprecated_get_frame_saved_regs (tmp_frame); |
43bd9a9e | 1557 | } |
c906108c SS |
1558 | |
1559 | /* Abominable hack. */ | |
1560 | if (current_target.to_has_execution == 0 | |
43bd9a9e AC |
1561 | && ((saved_regs[FLAGS_REGNUM] |
1562 | && (read_memory_integer (saved_regs[FLAGS_REGNUM], | |
53a5351d | 1563 | TARGET_PTR_BIT / 8) |
c906108c | 1564 | & 0x2)) |
43bd9a9e | 1565 | || (saved_regs[FLAGS_REGNUM] == 0 |
c906108c SS |
1566 | && read_register (FLAGS_REGNUM) & 0x2))) |
1567 | { | |
8bedc050 | 1568 | u = find_unwind_entry (DEPRECATED_FRAME_SAVED_PC (frame)); |
c906108c SS |
1569 | if (!u) |
1570 | { | |
0ba6dca9 | 1571 | return read_memory_integer (saved_regs[DEPRECATED_FP_REGNUM], |
53a5351d | 1572 | TARGET_PTR_BIT / 8); |
c906108c SS |
1573 | } |
1574 | else | |
1575 | { | |
1576 | return frame_base - (u->Total_frame_size << 3); | |
1577 | } | |
1578 | } | |
c5aa993b | 1579 | |
0ba6dca9 | 1580 | return read_memory_integer (saved_regs[DEPRECATED_FP_REGNUM], |
53a5351d | 1581 | TARGET_PTR_BIT / 8); |
c906108c SS |
1582 | } |
1583 | } | |
1584 | else | |
1585 | { | |
c906108c SS |
1586 | /* Get the innermost frame. */ |
1587 | tmp_frame = frame; | |
ef6e7e13 AC |
1588 | while (get_next_frame (tmp_frame) != NULL) |
1589 | tmp_frame = get_next_frame (tmp_frame); | |
c906108c | 1590 | |
c2c6d25f | 1591 | if (tmp_frame != saved_regs_frame) |
43bd9a9e AC |
1592 | { |
1593 | hppa_frame_init_saved_regs (tmp_frame); | |
1b1d3794 | 1594 | saved_regs = deprecated_get_frame_saved_regs (tmp_frame); |
43bd9a9e | 1595 | } |
c2c6d25f | 1596 | |
c906108c SS |
1597 | /* Abominable hack. See above. */ |
1598 | if (current_target.to_has_execution == 0 | |
43bd9a9e AC |
1599 | && ((saved_regs[FLAGS_REGNUM] |
1600 | && (read_memory_integer (saved_regs[FLAGS_REGNUM], | |
53a5351d | 1601 | TARGET_PTR_BIT / 8) |
c906108c | 1602 | & 0x2)) |
43bd9a9e | 1603 | || (saved_regs[FLAGS_REGNUM] == 0 |
c5aa993b | 1604 | && read_register (FLAGS_REGNUM) & 0x2))) |
c906108c | 1605 | { |
8bedc050 | 1606 | u = find_unwind_entry (DEPRECATED_FRAME_SAVED_PC (frame)); |
c906108c SS |
1607 | if (!u) |
1608 | { | |
0ba6dca9 | 1609 | return read_memory_integer (saved_regs[DEPRECATED_FP_REGNUM], |
53a5351d | 1610 | TARGET_PTR_BIT / 8); |
c906108c | 1611 | } |
c5aa993b JM |
1612 | else |
1613 | { | |
1614 | return frame_base - (u->Total_frame_size << 3); | |
1615 | } | |
c906108c | 1616 | } |
c5aa993b | 1617 | |
c906108c | 1618 | /* The value in %r3 was never saved into the stack (thus %r3 still |
c5aa993b | 1619 | holds the value of the previous frame pointer). */ |
0ba6dca9 | 1620 | return deprecated_read_fp (); |
c906108c SS |
1621 | } |
1622 | } | |
c906108c | 1623 | \f |
c5aa993b | 1624 | |
c906108c SS |
1625 | /* To see if a frame chain is valid, see if the caller looks like it |
1626 | was compiled with gcc. */ | |
1627 | ||
1628 | int | |
fba45db2 | 1629 | hppa_frame_chain_valid (CORE_ADDR chain, struct frame_info *thisframe) |
c906108c SS |
1630 | { |
1631 | struct minimal_symbol *msym_us; | |
1632 | struct minimal_symbol *msym_start; | |
1633 | struct unwind_table_entry *u, *next_u = NULL; | |
1634 | struct frame_info *next; | |
1635 | ||
ef6e7e13 | 1636 | u = find_unwind_entry (get_frame_pc (thisframe)); |
c906108c SS |
1637 | |
1638 | if (u == NULL) | |
1639 | return 1; | |
1640 | ||
1641 | /* We can't just check that the same of msym_us is "_start", because | |
1642 | someone idiotically decided that they were going to make a Ltext_end | |
1643 | symbol with the same address. This Ltext_end symbol is totally | |
1644 | indistinguishable (as nearly as I can tell) from the symbol for a function | |
1645 | which is (legitimately, since it is in the user's namespace) | |
1646 | named Ltext_end, so we can't just ignore it. */ | |
8bedc050 | 1647 | msym_us = lookup_minimal_symbol_by_pc (DEPRECATED_FRAME_SAVED_PC (thisframe)); |
c906108c SS |
1648 | msym_start = lookup_minimal_symbol ("_start", NULL, NULL); |
1649 | if (msym_us | |
1650 | && msym_start | |
1651 | && SYMBOL_VALUE_ADDRESS (msym_us) == SYMBOL_VALUE_ADDRESS (msym_start)) | |
1652 | return 0; | |
1653 | ||
1654 | /* Grrrr. Some new idiot decided that they don't want _start for the | |
1655 | PRO configurations; $START$ calls main directly.... Deal with it. */ | |
1656 | msym_start = lookup_minimal_symbol ("$START$", NULL, NULL); | |
1657 | if (msym_us | |
1658 | && msym_start | |
1659 | && SYMBOL_VALUE_ADDRESS (msym_us) == SYMBOL_VALUE_ADDRESS (msym_start)) | |
1660 | return 0; | |
1661 | ||
1662 | next = get_next_frame (thisframe); | |
1663 | if (next) | |
ef6e7e13 | 1664 | next_u = find_unwind_entry (get_frame_pc (next)); |
c906108c SS |
1665 | |
1666 | /* If this frame does not save SP, has no stack, isn't a stub, | |
1667 | and doesn't "call" an interrupt routine or signal handler caller, | |
1668 | then its not valid. */ | |
1669 | if (u->Save_SP || u->Total_frame_size || u->stub_unwind.stub_type != 0 | |
ef6e7e13 | 1670 | || (get_next_frame (thisframe) && (get_frame_type (get_next_frame (thisframe)) == SIGTRAMP_FRAME)) |
c906108c SS |
1671 | || (next_u && next_u->HP_UX_interrupt_marker)) |
1672 | return 1; | |
1673 | ||
ef6e7e13 | 1674 | if (pc_in_linker_stub (get_frame_pc (thisframe))) |
c906108c SS |
1675 | return 1; |
1676 | ||
1677 | return 0; | |
1678 | } | |
1679 | ||
7daf4f5b JB |
1680 | /* These functions deal with saving and restoring register state |
1681 | around a function call in the inferior. They keep the stack | |
1682 | double-word aligned; eventually, on an hp700, the stack will have | |
1683 | to be aligned to a 64-byte boundary. */ | |
c906108c SS |
1684 | |
1685 | void | |
7daf4f5b | 1686 | hppa_push_dummy_frame (void) |
c906108c SS |
1687 | { |
1688 | CORE_ADDR sp, pc, pcspace; | |
52f0bd74 | 1689 | int regnum; |
53a5351d | 1690 | CORE_ADDR int_buffer; |
c906108c SS |
1691 | double freg_buffer; |
1692 | ||
60383d10 | 1693 | pc = hppa_target_read_pc (inferior_ptid); |
c906108c SS |
1694 | int_buffer = read_register (FLAGS_REGNUM); |
1695 | if (int_buffer & 0x2) | |
1696 | { | |
3371ccc0 | 1697 | const unsigned int sid = (pc >> 30) & 0x3; |
c906108c SS |
1698 | if (sid == 0) |
1699 | pcspace = read_register (SR4_REGNUM); | |
1700 | else | |
1701 | pcspace = read_register (SR4_REGNUM + 4 + sid); | |
c906108c SS |
1702 | } |
1703 | else | |
1704 | pcspace = read_register (PCSQ_HEAD_REGNUM); | |
1705 | ||
1706 | /* Space for "arguments"; the RP goes in here. */ | |
1707 | sp = read_register (SP_REGNUM) + 48; | |
1708 | int_buffer = read_register (RP_REGNUM) | 0x3; | |
53a5351d JM |
1709 | |
1710 | /* The 32bit and 64bit ABIs save the return pointer into different | |
1711 | stack slots. */ | |
b1e29e33 AC |
1712 | if (DEPRECATED_REGISTER_SIZE == 8) |
1713 | write_memory (sp - 16, (char *) &int_buffer, DEPRECATED_REGISTER_SIZE); | |
53a5351d | 1714 | else |
b1e29e33 | 1715 | write_memory (sp - 20, (char *) &int_buffer, DEPRECATED_REGISTER_SIZE); |
c906108c | 1716 | |
0ba6dca9 | 1717 | int_buffer = deprecated_read_fp (); |
b1e29e33 | 1718 | write_memory (sp, (char *) &int_buffer, DEPRECATED_REGISTER_SIZE); |
c906108c | 1719 | |
0ba6dca9 | 1720 | write_register (DEPRECATED_FP_REGNUM, sp); |
c906108c | 1721 | |
b1e29e33 | 1722 | sp += 2 * DEPRECATED_REGISTER_SIZE; |
c906108c SS |
1723 | |
1724 | for (regnum = 1; regnum < 32; regnum++) | |
0ba6dca9 | 1725 | if (regnum != RP_REGNUM && regnum != DEPRECATED_FP_REGNUM) |
c906108c SS |
1726 | sp = push_word (sp, read_register (regnum)); |
1727 | ||
53a5351d | 1728 | /* This is not necessary for the 64bit ABI. In fact it is dangerous. */ |
b1e29e33 | 1729 | if (DEPRECATED_REGISTER_SIZE != 8) |
53a5351d | 1730 | sp += 4; |
c906108c SS |
1731 | |
1732 | for (regnum = FP0_REGNUM; regnum < NUM_REGS; regnum++) | |
1733 | { | |
62700349 | 1734 | deprecated_read_register_bytes (DEPRECATED_REGISTER_BYTE (regnum), |
73937e03 | 1735 | (char *) &freg_buffer, 8); |
c5aa993b | 1736 | sp = push_bytes (sp, (char *) &freg_buffer, 8); |
c906108c SS |
1737 | } |
1738 | sp = push_word (sp, read_register (IPSW_REGNUM)); | |
1739 | sp = push_word (sp, read_register (SAR_REGNUM)); | |
1740 | sp = push_word (sp, pc); | |
1741 | sp = push_word (sp, pcspace); | |
1742 | sp = push_word (sp, pc + 4); | |
1743 | sp = push_word (sp, pcspace); | |
1744 | write_register (SP_REGNUM, sp); | |
1745 | } | |
1746 | ||
1747 | static void | |
fba45db2 | 1748 | find_dummy_frame_regs (struct frame_info *frame, |
43bd9a9e | 1749 | CORE_ADDR frame_saved_regs[]) |
c906108c | 1750 | { |
ef6e7e13 | 1751 | CORE_ADDR fp = get_frame_base (frame); |
c906108c SS |
1752 | int i; |
1753 | ||
53a5351d | 1754 | /* The 32bit and 64bit ABIs save RP into different locations. */ |
b1e29e33 | 1755 | if (DEPRECATED_REGISTER_SIZE == 8) |
43bd9a9e | 1756 | frame_saved_regs[RP_REGNUM] = (fp - 16) & ~0x3; |
53a5351d | 1757 | else |
43bd9a9e | 1758 | frame_saved_regs[RP_REGNUM] = (fp - 20) & ~0x3; |
53a5351d | 1759 | |
0ba6dca9 | 1760 | frame_saved_regs[DEPRECATED_FP_REGNUM] = fp; |
c906108c | 1761 | |
b1e29e33 | 1762 | frame_saved_regs[1] = fp + (2 * DEPRECATED_REGISTER_SIZE); |
53a5351d | 1763 | |
b1e29e33 | 1764 | for (fp += 3 * DEPRECATED_REGISTER_SIZE, i = 3; i < 32; i++) |
c906108c | 1765 | { |
0ba6dca9 | 1766 | if (i != DEPRECATED_FP_REGNUM) |
c906108c | 1767 | { |
43bd9a9e | 1768 | frame_saved_regs[i] = fp; |
b1e29e33 | 1769 | fp += DEPRECATED_REGISTER_SIZE; |
c906108c SS |
1770 | } |
1771 | } | |
1772 | ||
53a5351d | 1773 | /* This is not necessary or desirable for the 64bit ABI. */ |
b1e29e33 | 1774 | if (DEPRECATED_REGISTER_SIZE != 8) |
53a5351d JM |
1775 | fp += 4; |
1776 | ||
c906108c | 1777 | for (i = FP0_REGNUM; i < NUM_REGS; i++, fp += 8) |
43bd9a9e AC |
1778 | frame_saved_regs[i] = fp; |
1779 | ||
1780 | frame_saved_regs[IPSW_REGNUM] = fp; | |
b1e29e33 AC |
1781 | frame_saved_regs[SAR_REGNUM] = fp + DEPRECATED_REGISTER_SIZE; |
1782 | frame_saved_regs[PCOQ_HEAD_REGNUM] = fp + 2 * DEPRECATED_REGISTER_SIZE; | |
1783 | frame_saved_regs[PCSQ_HEAD_REGNUM] = fp + 3 * DEPRECATED_REGISTER_SIZE; | |
1784 | frame_saved_regs[PCOQ_TAIL_REGNUM] = fp + 4 * DEPRECATED_REGISTER_SIZE; | |
1785 | frame_saved_regs[PCSQ_TAIL_REGNUM] = fp + 5 * DEPRECATED_REGISTER_SIZE; | |
c906108c SS |
1786 | } |
1787 | ||
1788 | void | |
fba45db2 | 1789 | hppa_pop_frame (void) |
c906108c | 1790 | { |
52f0bd74 AC |
1791 | struct frame_info *frame = get_current_frame (); |
1792 | CORE_ADDR fp, npc, target_pc; | |
1793 | int regnum; | |
43bd9a9e | 1794 | CORE_ADDR *fsr; |
c906108c SS |
1795 | double freg_buffer; |
1796 | ||
c193f6ac | 1797 | fp = get_frame_base (frame); |
43bd9a9e | 1798 | hppa_frame_init_saved_regs (frame); |
1b1d3794 | 1799 | fsr = deprecated_get_frame_saved_regs (frame); |
c906108c SS |
1800 | |
1801 | #ifndef NO_PC_SPACE_QUEUE_RESTORE | |
43bd9a9e AC |
1802 | if (fsr[IPSW_REGNUM]) /* Restoring a call dummy frame */ |
1803 | restore_pc_queue (fsr); | |
c906108c SS |
1804 | #endif |
1805 | ||
1806 | for (regnum = 31; regnum > 0; regnum--) | |
43bd9a9e AC |
1807 | if (fsr[regnum]) |
1808 | write_register (regnum, read_memory_integer (fsr[regnum], | |
b1e29e33 | 1809 | DEPRECATED_REGISTER_SIZE)); |
c906108c | 1810 | |
c5aa993b | 1811 | for (regnum = NUM_REGS - 1; regnum >= FP0_REGNUM; regnum--) |
43bd9a9e | 1812 | if (fsr[regnum]) |
c906108c | 1813 | { |
43bd9a9e | 1814 | read_memory (fsr[regnum], (char *) &freg_buffer, 8); |
62700349 | 1815 | deprecated_write_register_bytes (DEPRECATED_REGISTER_BYTE (regnum), |
73937e03 | 1816 | (char *) &freg_buffer, 8); |
c906108c SS |
1817 | } |
1818 | ||
43bd9a9e | 1819 | if (fsr[IPSW_REGNUM]) |
c906108c | 1820 | write_register (IPSW_REGNUM, |
43bd9a9e | 1821 | read_memory_integer (fsr[IPSW_REGNUM], |
b1e29e33 | 1822 | DEPRECATED_REGISTER_SIZE)); |
c906108c | 1823 | |
43bd9a9e | 1824 | if (fsr[SAR_REGNUM]) |
c906108c | 1825 | write_register (SAR_REGNUM, |
43bd9a9e | 1826 | read_memory_integer (fsr[SAR_REGNUM], |
b1e29e33 | 1827 | DEPRECATED_REGISTER_SIZE)); |
c906108c SS |
1828 | |
1829 | /* If the PC was explicitly saved, then just restore it. */ | |
43bd9a9e | 1830 | if (fsr[PCOQ_TAIL_REGNUM]) |
c906108c | 1831 | { |
43bd9a9e | 1832 | npc = read_memory_integer (fsr[PCOQ_TAIL_REGNUM], |
b1e29e33 | 1833 | DEPRECATED_REGISTER_SIZE); |
c906108c SS |
1834 | write_register (PCOQ_TAIL_REGNUM, npc); |
1835 | } | |
1836 | /* Else use the value in %rp to set the new PC. */ | |
c5aa993b | 1837 | else |
c906108c SS |
1838 | { |
1839 | npc = read_register (RP_REGNUM); | |
1840 | write_pc (npc); | |
1841 | } | |
1842 | ||
b1e29e33 | 1843 | write_register (DEPRECATED_FP_REGNUM, read_memory_integer (fp, DEPRECATED_REGISTER_SIZE)); |
c906108c | 1844 | |
43bd9a9e | 1845 | if (fsr[IPSW_REGNUM]) /* call dummy */ |
c906108c SS |
1846 | write_register (SP_REGNUM, fp - 48); |
1847 | else | |
1848 | write_register (SP_REGNUM, fp); | |
1849 | ||
1850 | /* The PC we just restored may be inside a return trampoline. If so | |
1851 | we want to restart the inferior and run it through the trampoline. | |
1852 | ||
1853 | Do this by setting a momentary breakpoint at the location the | |
1854 | trampoline returns to. | |
1855 | ||
1856 | Don't skip through the trampoline if we're popping a dummy frame. */ | |
1857 | target_pc = SKIP_TRAMPOLINE_CODE (npc & ~0x3) & ~0x3; | |
43bd9a9e | 1858 | if (target_pc && !fsr[IPSW_REGNUM]) |
c906108c SS |
1859 | { |
1860 | struct symtab_and_line sal; | |
1861 | struct breakpoint *breakpoint; | |
1862 | struct cleanup *old_chain; | |
1863 | ||
1864 | /* Set up our breakpoint. Set it to be silent as the MI code | |
c5aa993b | 1865 | for "return_command" will print the frame we returned to. */ |
c906108c SS |
1866 | sal = find_pc_line (target_pc, 0); |
1867 | sal.pc = target_pc; | |
516b1f28 | 1868 | breakpoint = set_momentary_breakpoint (sal, null_frame_id, bp_finish); |
c906108c SS |
1869 | breakpoint->silent = 1; |
1870 | ||
1871 | /* So we can clean things up. */ | |
4d6140d9 | 1872 | old_chain = make_cleanup_delete_breakpoint (breakpoint); |
c906108c SS |
1873 | |
1874 | /* Start up the inferior. */ | |
1875 | clear_proceed_status (); | |
1876 | proceed_to_finish = 1; | |
2acceee2 | 1877 | proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0); |
c906108c SS |
1878 | |
1879 | /* Perform our cleanups. */ | |
1880 | do_cleanups (old_chain); | |
1881 | } | |
1882 | flush_cached_frames (); | |
1883 | } | |
1884 | ||
1885 | /* After returning to a dummy on the stack, restore the instruction | |
1886 | queue space registers. */ | |
1887 | ||
1888 | static int | |
43bd9a9e | 1889 | restore_pc_queue (CORE_ADDR *fsr) |
c906108c SS |
1890 | { |
1891 | CORE_ADDR pc = read_pc (); | |
43bd9a9e | 1892 | CORE_ADDR new_pc = read_memory_integer (fsr[PCOQ_HEAD_REGNUM], |
53a5351d | 1893 | TARGET_PTR_BIT / 8); |
c906108c SS |
1894 | struct target_waitstatus w; |
1895 | int insn_count; | |
1896 | ||
1897 | /* Advance past break instruction in the call dummy. */ | |
1898 | write_register (PCOQ_HEAD_REGNUM, pc + 4); | |
1899 | write_register (PCOQ_TAIL_REGNUM, pc + 8); | |
1900 | ||
1901 | /* HPUX doesn't let us set the space registers or the space | |
1902 | registers of the PC queue through ptrace. Boo, hiss. | |
1903 | Conveniently, the call dummy has this sequence of instructions | |
1904 | after the break: | |
c5aa993b JM |
1905 | mtsp r21, sr0 |
1906 | ble,n 0(sr0, r22) | |
1907 | ||
c906108c SS |
1908 | So, load up the registers and single step until we are in the |
1909 | right place. */ | |
1910 | ||
43bd9a9e | 1911 | write_register (21, read_memory_integer (fsr[PCSQ_HEAD_REGNUM], |
b1e29e33 | 1912 | DEPRECATED_REGISTER_SIZE)); |
c906108c SS |
1913 | write_register (22, new_pc); |
1914 | ||
1915 | for (insn_count = 0; insn_count < 3; insn_count++) | |
1916 | { | |
1917 | /* FIXME: What if the inferior gets a signal right now? Want to | |
c5aa993b JM |
1918 | merge this into wait_for_inferior (as a special kind of |
1919 | watchpoint? By setting a breakpoint at the end? Is there | |
1920 | any other choice? Is there *any* way to do this stuff with | |
1921 | ptrace() or some equivalent?). */ | |
c906108c | 1922 | resume (1, 0); |
39f77062 | 1923 | target_wait (inferior_ptid, &w); |
c906108c SS |
1924 | |
1925 | if (w.kind == TARGET_WAITKIND_SIGNALLED) | |
c5aa993b JM |
1926 | { |
1927 | stop_signal = w.value.sig; | |
1928 | terminal_ours_for_output (); | |
1929 | printf_unfiltered ("\nProgram terminated with signal %s, %s.\n", | |
c906108c SS |
1930 | target_signal_to_name (stop_signal), |
1931 | target_signal_to_string (stop_signal)); | |
c5aa993b JM |
1932 | gdb_flush (gdb_stdout); |
1933 | return 0; | |
1934 | } | |
c906108c SS |
1935 | } |
1936 | target_terminal_ours (); | |
1937 | target_fetch_registers (-1); | |
1938 | return 1; | |
1939 | } | |
1940 | ||
c2c6d25f JM |
1941 | |
1942 | #ifdef PA20W_CALLING_CONVENTIONS | |
1943 | ||
53a5351d JM |
1944 | /* This function pushes a stack frame with arguments as part of the |
1945 | inferior function calling mechanism. | |
c906108c | 1946 | |
c2c6d25f JM |
1947 | This is the version for the PA64, in which later arguments appear |
1948 | at higher addresses. (The stack always grows towards higher | |
1949 | addresses.) | |
c906108c | 1950 | |
53a5351d JM |
1951 | We simply allocate the appropriate amount of stack space and put |
1952 | arguments into their proper slots. The call dummy code will copy | |
1953 | arguments into registers as needed by the ABI. | |
c906108c | 1954 | |
c2c6d25f JM |
1955 | This ABI also requires that the caller provide an argument pointer |
1956 | to the callee, so we do that too. */ | |
53a5351d | 1957 | |
c906108c | 1958 | CORE_ADDR |
ea7c478f | 1959 | hppa_push_arguments (int nargs, struct value **args, CORE_ADDR sp, |
fba45db2 | 1960 | int struct_return, CORE_ADDR struct_addr) |
c906108c SS |
1961 | { |
1962 | /* array of arguments' offsets */ | |
c5aa993b | 1963 | int *offset = (int *) alloca (nargs * sizeof (int)); |
53a5351d JM |
1964 | |
1965 | /* array of arguments' lengths: real lengths in bytes, not aligned to | |
1966 | word size */ | |
c5aa993b | 1967 | int *lengths = (int *) alloca (nargs * sizeof (int)); |
c906108c | 1968 | |
53a5351d JM |
1969 | /* The value of SP as it was passed into this function after |
1970 | aligning. */ | |
f27dd7fd | 1971 | CORE_ADDR orig_sp = DEPRECATED_STACK_ALIGN (sp); |
c906108c | 1972 | |
53a5351d JM |
1973 | /* The number of stack bytes occupied by the current argument. */ |
1974 | int bytes_reserved; | |
1975 | ||
1976 | /* The total number of bytes reserved for the arguments. */ | |
1977 | int cum_bytes_reserved = 0; | |
c906108c | 1978 | |
53a5351d JM |
1979 | /* Similarly, but aligned. */ |
1980 | int cum_bytes_aligned = 0; | |
1981 | int i; | |
c5aa993b | 1982 | |
53a5351d | 1983 | /* Iterate over each argument provided by the user. */ |
c906108c SS |
1984 | for (i = 0; i < nargs; i++) |
1985 | { | |
c2c6d25f JM |
1986 | struct type *arg_type = VALUE_TYPE (args[i]); |
1987 | ||
1988 | /* Integral scalar values smaller than a register are padded on | |
1989 | the left. We do this by promoting them to full-width, | |
1990 | although the ABI says to pad them with garbage. */ | |
1991 | if (is_integral_type (arg_type) | |
b1e29e33 | 1992 | && TYPE_LENGTH (arg_type) < DEPRECATED_REGISTER_SIZE) |
c2c6d25f JM |
1993 | { |
1994 | args[i] = value_cast ((TYPE_UNSIGNED (arg_type) | |
1995 | ? builtin_type_unsigned_long | |
1996 | : builtin_type_long), | |
1997 | args[i]); | |
1998 | arg_type = VALUE_TYPE (args[i]); | |
1999 | } | |
2000 | ||
2001 | lengths[i] = TYPE_LENGTH (arg_type); | |
c906108c | 2002 | |
53a5351d JM |
2003 | /* Align the size of the argument to the word size for this |
2004 | target. */ | |
b1e29e33 | 2005 | bytes_reserved = (lengths[i] + DEPRECATED_REGISTER_SIZE - 1) & -DEPRECATED_REGISTER_SIZE; |
c906108c | 2006 | |
53a5351d JM |
2007 | offset[i] = cum_bytes_reserved; |
2008 | ||
c2c6d25f JM |
2009 | /* Aggregates larger than eight bytes (the only types larger |
2010 | than eight bytes we have) are aligned on a 16-byte boundary, | |
2011 | possibly padded on the right with garbage. This may leave an | |
2012 | empty word on the stack, and thus an unused register, as per | |
2013 | the ABI. */ | |
2014 | if (bytes_reserved > 8) | |
2015 | { | |
2016 | /* Round up the offset to a multiple of two slots. */ | |
b1e29e33 AC |
2017 | int new_offset = ((offset[i] + 2*DEPRECATED_REGISTER_SIZE-1) |
2018 | & -(2*DEPRECATED_REGISTER_SIZE)); | |
c906108c | 2019 | |
c2c6d25f JM |
2020 | /* Note the space we've wasted, if any. */ |
2021 | bytes_reserved += new_offset - offset[i]; | |
2022 | offset[i] = new_offset; | |
2023 | } | |
53a5351d | 2024 | |
c2c6d25f JM |
2025 | cum_bytes_reserved += bytes_reserved; |
2026 | } | |
2027 | ||
2028 | /* CUM_BYTES_RESERVED already accounts for all the arguments | |
2029 | passed by the user. However, the ABIs mandate minimum stack space | |
2030 | allocations for outgoing arguments. | |
2031 | ||
2032 | The ABIs also mandate minimum stack alignments which we must | |
2033 | preserve. */ | |
f27dd7fd | 2034 | cum_bytes_aligned = DEPRECATED_STACK_ALIGN (cum_bytes_reserved); |
c2c6d25f JM |
2035 | sp += max (cum_bytes_aligned, REG_PARM_STACK_SPACE); |
2036 | ||
2037 | /* Now write each of the args at the proper offset down the stack. */ | |
2038 | for (i = 0; i < nargs; i++) | |
2039 | write_memory (orig_sp + offset[i], VALUE_CONTENTS (args[i]), lengths[i]); | |
2040 | ||
2041 | /* If a structure has to be returned, set up register 28 to hold its | |
2042 | address */ | |
2043 | if (struct_return) | |
2044 | write_register (28, struct_addr); | |
2045 | ||
2046 | /* For the PA64 we must pass a pointer to the outgoing argument list. | |
2047 | The ABI mandates that the pointer should point to the first byte of | |
2048 | storage beyond the register flushback area. | |
2049 | ||
2050 | However, the call dummy expects the outgoing argument pointer to | |
2051 | be passed in register %r4. */ | |
2052 | write_register (4, orig_sp + REG_PARM_STACK_SPACE); | |
2053 | ||
2054 | /* ?!? This needs further work. We need to set up the global data | |
2055 | pointer for this procedure. This assumes the same global pointer | |
2056 | for every procedure. The call dummy expects the dp value to | |
2057 | be passed in register %r6. */ | |
2058 | write_register (6, read_register (27)); | |
2059 | ||
2060 | /* The stack will have 64 bytes of additional space for a frame marker. */ | |
2061 | return sp + 64; | |
2062 | } | |
2063 | ||
2064 | #else | |
2065 | ||
2066 | /* This function pushes a stack frame with arguments as part of the | |
2067 | inferior function calling mechanism. | |
2068 | ||
2069 | This is the version of the function for the 32-bit PA machines, in | |
2070 | which later arguments appear at lower addresses. (The stack always | |
2071 | grows towards higher addresses.) | |
2072 | ||
2073 | We simply allocate the appropriate amount of stack space and put | |
2074 | arguments into their proper slots. The call dummy code will copy | |
2075 | arguments into registers as needed by the ABI. */ | |
2076 | ||
2077 | CORE_ADDR | |
ea7c478f | 2078 | hppa_push_arguments (int nargs, struct value **args, CORE_ADDR sp, |
fba45db2 | 2079 | int struct_return, CORE_ADDR struct_addr) |
c2c6d25f JM |
2080 | { |
2081 | /* array of arguments' offsets */ | |
2082 | int *offset = (int *) alloca (nargs * sizeof (int)); | |
2083 | ||
2084 | /* array of arguments' lengths: real lengths in bytes, not aligned to | |
2085 | word size */ | |
2086 | int *lengths = (int *) alloca (nargs * sizeof (int)); | |
2087 | ||
2088 | /* The number of stack bytes occupied by the current argument. */ | |
2089 | int bytes_reserved; | |
2090 | ||
2091 | /* The total number of bytes reserved for the arguments. */ | |
2092 | int cum_bytes_reserved = 0; | |
2093 | ||
2094 | /* Similarly, but aligned. */ | |
2095 | int cum_bytes_aligned = 0; | |
2096 | int i; | |
2097 | ||
2098 | /* Iterate over each argument provided by the user. */ | |
2099 | for (i = 0; i < nargs; i++) | |
2100 | { | |
2101 | lengths[i] = TYPE_LENGTH (VALUE_TYPE (args[i])); | |
2102 | ||
2103 | /* Align the size of the argument to the word size for this | |
2104 | target. */ | |
b1e29e33 | 2105 | bytes_reserved = (lengths[i] + DEPRECATED_REGISTER_SIZE - 1) & -DEPRECATED_REGISTER_SIZE; |
c2c6d25f | 2106 | |
b6649e88 AC |
2107 | offset[i] = (cum_bytes_reserved |
2108 | + (lengths[i] > 4 ? bytes_reserved : lengths[i])); | |
c2c6d25f JM |
2109 | |
2110 | /* If the argument is a double word argument, then it needs to be | |
2111 | double word aligned. */ | |
b1e29e33 AC |
2112 | if ((bytes_reserved == 2 * DEPRECATED_REGISTER_SIZE) |
2113 | && (offset[i] % 2 * DEPRECATED_REGISTER_SIZE)) | |
c5aa993b JM |
2114 | { |
2115 | int new_offset = 0; | |
53a5351d JM |
2116 | /* BYTES_RESERVED is already aligned to the word, so we put |
2117 | the argument at one word more down the stack. | |
2118 | ||
2119 | This will leave one empty word on the stack, and one unused | |
2120 | register as mandated by the ABI. */ | |
b1e29e33 AC |
2121 | new_offset = ((offset[i] + 2 * DEPRECATED_REGISTER_SIZE - 1) |
2122 | & -(2 * DEPRECATED_REGISTER_SIZE)); | |
53a5351d | 2123 | |
b1e29e33 | 2124 | if ((new_offset - offset[i]) >= 2 * DEPRECATED_REGISTER_SIZE) |
c5aa993b | 2125 | { |
b1e29e33 AC |
2126 | bytes_reserved += DEPRECATED_REGISTER_SIZE; |
2127 | offset[i] += DEPRECATED_REGISTER_SIZE; | |
c5aa993b JM |
2128 | } |
2129 | } | |
c906108c SS |
2130 | |
2131 | cum_bytes_reserved += bytes_reserved; | |
2132 | ||
2133 | } | |
2134 | ||
c2c6d25f JM |
2135 | /* CUM_BYTES_RESERVED already accounts for all the arguments passed |
2136 | by the user. However, the ABI mandates minimum stack space | |
53a5351d JM |
2137 | allocations for outgoing arguments. |
2138 | ||
c2c6d25f | 2139 | The ABI also mandates minimum stack alignments which we must |
53a5351d | 2140 | preserve. */ |
f27dd7fd | 2141 | cum_bytes_aligned = DEPRECATED_STACK_ALIGN (cum_bytes_reserved); |
53a5351d JM |
2142 | sp += max (cum_bytes_aligned, REG_PARM_STACK_SPACE); |
2143 | ||
2144 | /* Now write each of the args at the proper offset down the stack. | |
53a5351d JM |
2145 | ?!? We need to promote values to a full register instead of skipping |
2146 | words in the stack. */ | |
c906108c SS |
2147 | for (i = 0; i < nargs; i++) |
2148 | write_memory (sp - offset[i], VALUE_CONTENTS (args[i]), lengths[i]); | |
c906108c | 2149 | |
53a5351d JM |
2150 | /* If a structure has to be returned, set up register 28 to hold its |
2151 | address */ | |
c906108c SS |
2152 | if (struct_return) |
2153 | write_register (28, struct_addr); | |
2154 | ||
53a5351d | 2155 | /* The stack will have 32 bytes of additional space for a frame marker. */ |
c906108c SS |
2156 | return sp + 32; |
2157 | } | |
2158 | ||
c2c6d25f | 2159 | #endif |
c906108c | 2160 | |
79508e1e AC |
2161 | /* This function pushes a stack frame with arguments as part of the |
2162 | inferior function calling mechanism. | |
2163 | ||
2164 | This is the version of the function for the 32-bit PA machines, in | |
2165 | which later arguments appear at lower addresses. (The stack always | |
2166 | grows towards higher addresses.) | |
2167 | ||
2168 | We simply allocate the appropriate amount of stack space and put | |
2169 | arguments into their proper slots. */ | |
2170 | ||
2171 | CORE_ADDR | |
2172 | hppa32_push_dummy_call (struct gdbarch *gdbarch, CORE_ADDR func_addr, | |
2173 | struct regcache *regcache, CORE_ADDR bp_addr, | |
2174 | int nargs, struct value **args, CORE_ADDR sp, | |
2175 | int struct_return, CORE_ADDR struct_addr) | |
2176 | { | |
2177 | /* NOTE: cagney/2004-02-27: This is a guess - its implemented by | |
2178 | reverse engineering testsuite failures. */ | |
2179 | ||
2180 | /* Stack base address at which any pass-by-reference parameters are | |
2181 | stored. */ | |
2182 | CORE_ADDR struct_end = 0; | |
2183 | /* Stack base address at which the first parameter is stored. */ | |
2184 | CORE_ADDR param_end = 0; | |
2185 | ||
2186 | /* The inner most end of the stack after all the parameters have | |
2187 | been pushed. */ | |
2188 | CORE_ADDR new_sp = 0; | |
2189 | ||
2190 | /* Two passes. First pass computes the location of everything, | |
2191 | second pass writes the bytes out. */ | |
2192 | int write_pass; | |
2193 | for (write_pass = 0; write_pass < 2; write_pass++) | |
2194 | { | |
1797a8f6 AC |
2195 | CORE_ADDR struct_ptr = 0; |
2196 | CORE_ADDR param_ptr = 0; | |
79508e1e AC |
2197 | int reg = 27; /* NOTE: Registers go down. */ |
2198 | int i; | |
2199 | for (i = 0; i < nargs; i++) | |
2200 | { | |
2201 | struct value *arg = args[i]; | |
2202 | struct type *type = check_typedef (VALUE_TYPE (arg)); | |
2203 | /* The corresponding parameter that is pushed onto the | |
2204 | stack, and [possibly] passed in a register. */ | |
2205 | char param_val[8]; | |
2206 | int param_len; | |
2207 | memset (param_val, 0, sizeof param_val); | |
2208 | if (TYPE_LENGTH (type) > 8) | |
2209 | { | |
2210 | /* Large parameter, pass by reference. Store the value | |
2211 | in "struct" area and then pass its address. */ | |
2212 | param_len = 4; | |
1797a8f6 | 2213 | struct_ptr += align_up (TYPE_LENGTH (type), 8); |
79508e1e | 2214 | if (write_pass) |
1797a8f6 | 2215 | write_memory (struct_end - struct_ptr, VALUE_CONTENTS (arg), |
79508e1e | 2216 | TYPE_LENGTH (type)); |
1797a8f6 | 2217 | store_unsigned_integer (param_val, 4, struct_end - struct_ptr); |
79508e1e AC |
2218 | } |
2219 | else if (TYPE_CODE (type) == TYPE_CODE_INT | |
2220 | || TYPE_CODE (type) == TYPE_CODE_ENUM) | |
2221 | { | |
2222 | /* Integer value store, right aligned. "unpack_long" | |
2223 | takes care of any sign-extension problems. */ | |
2224 | param_len = align_up (TYPE_LENGTH (type), 4); | |
2225 | store_unsigned_integer (param_val, param_len, | |
2226 | unpack_long (type, | |
2227 | VALUE_CONTENTS (arg))); | |
2228 | } | |
2229 | else | |
2230 | { | |
2231 | /* Small struct value, store right aligned? */ | |
2232 | param_len = align_up (TYPE_LENGTH (type), 4); | |
2233 | memcpy (param_val + param_len - TYPE_LENGTH (type), | |
2234 | VALUE_CONTENTS (arg), TYPE_LENGTH (type)); | |
2235 | } | |
1797a8f6 | 2236 | param_ptr += param_len; |
79508e1e AC |
2237 | reg -= param_len / 4; |
2238 | if (write_pass) | |
2239 | { | |
1797a8f6 | 2240 | write_memory (param_end - param_ptr, param_val, param_len); |
79508e1e AC |
2241 | if (reg >= 23) |
2242 | { | |
2243 | regcache_cooked_write (regcache, reg, param_val); | |
2244 | if (param_len > 4) | |
2245 | regcache_cooked_write (regcache, reg + 1, param_val + 4); | |
2246 | } | |
2247 | } | |
2248 | } | |
2249 | ||
2250 | /* Update the various stack pointers. */ | |
2251 | if (!write_pass) | |
2252 | { | |
2253 | struct_end = sp + struct_ptr; | |
2254 | /* PARAM_PTR already accounts for all the arguments passed | |
2255 | by the user. However, the ABI mandates minimum stack | |
2256 | space allocations for outgoing arguments. The ABI also | |
2257 | mandates minimum stack alignments which we must | |
2258 | preserve. */ | |
2259 | param_end = struct_end + max (align_up (param_ptr, 8), | |
2260 | REG_PARM_STACK_SPACE); | |
2261 | } | |
2262 | } | |
2263 | ||
2264 | /* If a structure has to be returned, set up register 28 to hold its | |
2265 | address */ | |
2266 | if (struct_return) | |
2267 | write_register (28, struct_addr); | |
2268 | ||
2269 | /* Set the return address. */ | |
2270 | regcache_cooked_write_unsigned (regcache, RP_REGNUM, bp_addr); | |
2271 | ||
2272 | /* The stack will have 32 bytes of additional space for a frame marker. */ | |
2273 | return param_end + 32; | |
2274 | } | |
2275 | ||
2f690297 AC |
2276 | /* This function pushes a stack frame with arguments as part of the |
2277 | inferior function calling mechanism. | |
2278 | ||
2279 | This is the version for the PA64, in which later arguments appear | |
2280 | at higher addresses. (The stack always grows towards higher | |
2281 | addresses.) | |
2282 | ||
2283 | We simply allocate the appropriate amount of stack space and put | |
2284 | arguments into their proper slots. | |
2285 | ||
2286 | This ABI also requires that the caller provide an argument pointer | |
2287 | to the callee, so we do that too. */ | |
2288 | ||
2289 | CORE_ADDR | |
2290 | hppa64_push_dummy_call (struct gdbarch *gdbarch, CORE_ADDR func_addr, | |
2291 | struct regcache *regcache, CORE_ADDR bp_addr, | |
2292 | int nargs, struct value **args, CORE_ADDR sp, | |
2293 | int struct_return, CORE_ADDR struct_addr) | |
2294 | { | |
2295 | /* Array of arguments' offsets. */ | |
2296 | int *offset = (int *) alloca (nargs * sizeof (int)); | |
2297 | ||
2298 | /* Array of arguments' lengths: real lengths in bytes, not aligned | |
2299 | to word size. */ | |
2300 | int *lengths = (int *) alloca (nargs * sizeof (int)); | |
2301 | ||
2302 | /* The value of SP as it was passed into this function. */ | |
2303 | CORE_ADDR orig_sp = sp; | |
2304 | ||
2305 | /* The number of stack bytes occupied by the current argument. */ | |
2306 | int bytes_reserved; | |
2307 | ||
2308 | /* The total number of bytes reserved for the arguments. */ | |
2309 | int cum_bytes_reserved = 0; | |
2310 | ||
2311 | /* Similarly, but aligned. */ | |
2312 | int cum_bytes_aligned = 0; | |
2313 | int i; | |
2314 | ||
2315 | /* Iterate over each argument provided by the user. */ | |
2316 | for (i = 0; i < nargs; i++) | |
2317 | { | |
2318 | struct type *arg_type = VALUE_TYPE (args[i]); | |
2319 | ||
2320 | /* Integral scalar values smaller than a register are padded on | |
2321 | the left. We do this by promoting them to full-width, | |
2322 | although the ABI says to pad them with garbage. */ | |
2323 | if (is_integral_type (arg_type) | |
2324 | && TYPE_LENGTH (arg_type) < DEPRECATED_REGISTER_SIZE) | |
2325 | { | |
2326 | args[i] = value_cast ((TYPE_UNSIGNED (arg_type) | |
2327 | ? builtin_type_unsigned_long | |
2328 | : builtin_type_long), | |
2329 | args[i]); | |
2330 | arg_type = VALUE_TYPE (args[i]); | |
2331 | } | |
2332 | ||
2333 | lengths[i] = TYPE_LENGTH (arg_type); | |
2334 | ||
2335 | /* Align the size of the argument to the word size for this | |
2336 | target. */ | |
2337 | bytes_reserved = (lengths[i] + DEPRECATED_REGISTER_SIZE - 1) & -DEPRECATED_REGISTER_SIZE; | |
2338 | ||
2339 | offset[i] = cum_bytes_reserved; | |
2340 | ||
2341 | /* Aggregates larger than eight bytes (the only types larger | |
2342 | than eight bytes we have) are aligned on a 16-byte boundary, | |
2343 | possibly padded on the right with garbage. This may leave an | |
2344 | empty word on the stack, and thus an unused register, as per | |
2345 | the ABI. */ | |
2346 | if (bytes_reserved > 8) | |
2347 | { | |
2348 | /* Round up the offset to a multiple of two slots. */ | |
2349 | int new_offset = ((offset[i] + 2*DEPRECATED_REGISTER_SIZE-1) | |
2350 | & -(2*DEPRECATED_REGISTER_SIZE)); | |
2351 | ||
2352 | /* Note the space we've wasted, if any. */ | |
2353 | bytes_reserved += new_offset - offset[i]; | |
2354 | offset[i] = new_offset; | |
2355 | } | |
2356 | ||
2357 | cum_bytes_reserved += bytes_reserved; | |
2358 | } | |
2359 | ||
2360 | /* CUM_BYTES_RESERVED already accounts for all the arguments passed | |
2361 | by the user. However, the ABIs mandate minimum stack space | |
2362 | allocations for outgoing arguments. | |
2363 | ||
2364 | The ABIs also mandate minimum stack alignments which we must | |
2365 | preserve. */ | |
2366 | cum_bytes_aligned = align_up (cum_bytes_reserved, 16); | |
2367 | sp += max (cum_bytes_aligned, REG_PARM_STACK_SPACE); | |
2368 | ||
2369 | /* Now write each of the args at the proper offset down the | |
2370 | stack. */ | |
2371 | for (i = 0; i < nargs; i++) | |
2372 | write_memory (orig_sp + offset[i], VALUE_CONTENTS (args[i]), lengths[i]); | |
2373 | ||
2374 | /* If a structure has to be returned, set up register 28 to hold its | |
2375 | address */ | |
2376 | if (struct_return) | |
2377 | write_register (28, struct_addr); | |
2378 | ||
2379 | /* For the PA64 we must pass a pointer to the outgoing argument | |
2380 | list. The ABI mandates that the pointer should point to the | |
2381 | first byte of storage beyond the register flushback area. | |
2382 | ||
2383 | However, the call dummy expects the outgoing argument pointer to | |
2384 | be passed in register %r4. */ | |
2385 | write_register (4, orig_sp + REG_PARM_STACK_SPACE); | |
2386 | ||
2387 | /* ?!? This needs further work. We need to set up the global data | |
2388 | pointer for this procedure. This assumes the same global pointer | |
2389 | for every procedure. The call dummy expects the dp value to be | |
2390 | passed in register %r6. */ | |
2391 | write_register (6, read_register (27)); | |
2392 | ||
2393 | /* Set the return address. */ | |
2394 | regcache_cooked_write_unsigned (regcache, RP_REGNUM, bp_addr); | |
2395 | ||
2396 | /* The stack will have 64 bytes of additional space for a frame | |
2397 | marker. */ | |
2398 | return sp + 64; | |
2399 | ||
2400 | } | |
2401 | ||
1797a8f6 AC |
2402 | static CORE_ADDR |
2403 | hppa32_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr) | |
2404 | { | |
2405 | /* HP frames are 64-byte (or cache line) aligned (yes that's _byte_ | |
2406 | and not _bit_)! */ | |
2407 | return align_up (addr, 64); | |
2408 | } | |
2409 | ||
2f690297 AC |
2410 | /* Force all frames to 16-byte alignment. Better safe than sorry. */ |
2411 | ||
2412 | static CORE_ADDR | |
1797a8f6 | 2413 | hppa64_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr) |
2f690297 AC |
2414 | { |
2415 | /* Just always 16-byte align. */ | |
2416 | return align_up (addr, 16); | |
2417 | } | |
2418 | ||
2419 | ||
c906108c | 2420 | /* elz: Used to lookup a symbol in the shared libraries. |
c5aa993b JM |
2421 | This function calls shl_findsym, indirectly through a |
2422 | call to __d_shl_get. __d_shl_get is in end.c, which is always | |
2423 | linked in by the hp compilers/linkers. | |
2424 | The call to shl_findsym cannot be made directly because it needs | |
2425 | to be active in target address space. | |
2426 | inputs: - minimal symbol pointer for the function we want to look up | |
2427 | - address in target space of the descriptor for the library | |
2428 | where we want to look the symbol up. | |
2429 | This address is retrieved using the | |
2430 | som_solib_get_solib_by_pc function (somsolib.c). | |
2431 | output: - real address in the library of the function. | |
2432 | note: the handle can be null, in which case shl_findsym will look for | |
2433 | the symbol in all the loaded shared libraries. | |
2434 | files to look at if you need reference on this stuff: | |
2435 | dld.c, dld_shl_findsym.c | |
2436 | end.c | |
2437 | man entry for shl_findsym */ | |
c906108c SS |
2438 | |
2439 | CORE_ADDR | |
fba45db2 | 2440 | find_stub_with_shl_get (struct minimal_symbol *function, CORE_ADDR handle) |
c906108c | 2441 | { |
c5aa993b JM |
2442 | struct symbol *get_sym, *symbol2; |
2443 | struct minimal_symbol *buff_minsym, *msymbol; | |
2444 | struct type *ftype; | |
ea7c478f AC |
2445 | struct value **args; |
2446 | struct value *funcval; | |
2447 | struct value *val; | |
c5aa993b JM |
2448 | |
2449 | int x, namelen, err_value, tmp = -1; | |
2450 | CORE_ADDR endo_buff_addr, value_return_addr, errno_return_addr; | |
2451 | CORE_ADDR stub_addr; | |
2452 | ||
2453 | ||
ea7c478f | 2454 | args = alloca (sizeof (struct value *) * 8); /* 6 for the arguments and one null one??? */ |
c5aa993b | 2455 | funcval = find_function_in_inferior ("__d_shl_get"); |
176620f1 | 2456 | get_sym = lookup_symbol ("__d_shl_get", NULL, VAR_DOMAIN, NULL, NULL); |
c5aa993b JM |
2457 | buff_minsym = lookup_minimal_symbol ("__buffer", NULL, NULL); |
2458 | msymbol = lookup_minimal_symbol ("__shldp", NULL, NULL); | |
176620f1 | 2459 | symbol2 = lookup_symbol ("__shldp", NULL, VAR_DOMAIN, NULL, NULL); |
c5aa993b | 2460 | endo_buff_addr = SYMBOL_VALUE_ADDRESS (buff_minsym); |
22abf04a | 2461 | namelen = strlen (DEPRECATED_SYMBOL_NAME (function)); |
c5aa993b JM |
2462 | value_return_addr = endo_buff_addr + namelen; |
2463 | ftype = check_typedef (SYMBOL_TYPE (get_sym)); | |
2464 | ||
2465 | /* do alignment */ | |
2466 | if ((x = value_return_addr % 64) != 0) | |
2467 | value_return_addr = value_return_addr + 64 - x; | |
2468 | ||
2469 | errno_return_addr = value_return_addr + 64; | |
2470 | ||
2471 | ||
2472 | /* set up stuff needed by __d_shl_get in buffer in end.o */ | |
2473 | ||
22abf04a | 2474 | target_write_memory (endo_buff_addr, DEPRECATED_SYMBOL_NAME (function), namelen); |
c5aa993b JM |
2475 | |
2476 | target_write_memory (value_return_addr, (char *) &tmp, 4); | |
2477 | ||
2478 | target_write_memory (errno_return_addr, (char *) &tmp, 4); | |
2479 | ||
2480 | target_write_memory (SYMBOL_VALUE_ADDRESS (msymbol), | |
2481 | (char *) &handle, 4); | |
2482 | ||
2483 | /* now prepare the arguments for the call */ | |
2484 | ||
2485 | args[0] = value_from_longest (TYPE_FIELD_TYPE (ftype, 0), 12); | |
4478b372 JB |
2486 | args[1] = value_from_pointer (TYPE_FIELD_TYPE (ftype, 1), SYMBOL_VALUE_ADDRESS (msymbol)); |
2487 | args[2] = value_from_pointer (TYPE_FIELD_TYPE (ftype, 2), endo_buff_addr); | |
c5aa993b | 2488 | args[3] = value_from_longest (TYPE_FIELD_TYPE (ftype, 3), TYPE_PROCEDURE); |
4478b372 JB |
2489 | args[4] = value_from_pointer (TYPE_FIELD_TYPE (ftype, 4), value_return_addr); |
2490 | args[5] = value_from_pointer (TYPE_FIELD_TYPE (ftype, 5), errno_return_addr); | |
c5aa993b JM |
2491 | |
2492 | /* now call the function */ | |
2493 | ||
2494 | val = call_function_by_hand (funcval, 6, args); | |
2495 | ||
2496 | /* now get the results */ | |
2497 | ||
2498 | target_read_memory (errno_return_addr, (char *) &err_value, sizeof (err_value)); | |
2499 | ||
2500 | target_read_memory (value_return_addr, (char *) &stub_addr, sizeof (stub_addr)); | |
2501 | if (stub_addr <= 0) | |
104c1213 | 2502 | error ("call to __d_shl_get failed, error code is %d", err_value); |
c5aa993b JM |
2503 | |
2504 | return (stub_addr); | |
c906108c SS |
2505 | } |
2506 | ||
c5aa993b | 2507 | /* Cover routine for find_stub_with_shl_get to pass to catch_errors */ |
a0b3c4fd | 2508 | static int |
4efb68b1 | 2509 | cover_find_stub_with_shl_get (void *args_untyped) |
c906108c | 2510 | { |
a0b3c4fd JM |
2511 | args_for_find_stub *args = args_untyped; |
2512 | args->return_val = find_stub_with_shl_get (args->msym, args->solib_handle); | |
2513 | return 0; | |
c906108c SS |
2514 | } |
2515 | ||
c906108c SS |
2516 | /* Insert the specified number of args and function address |
2517 | into a call sequence of the above form stored at DUMMYNAME. | |
2518 | ||
2519 | On the hppa we need to call the stack dummy through $$dyncall. | |
b1e29e33 AC |
2520 | Therefore our version of DEPRECATED_FIX_CALL_DUMMY takes an extra |
2521 | argument, real_pc, which is the location where gdb should start up | |
2522 | the inferior to do the function call. | |
cce74817 JM |
2523 | |
2524 | This has to work across several versions of hpux, bsd, osf1. It has to | |
2525 | work regardless of what compiler was used to build the inferior program. | |
2526 | It should work regardless of whether or not end.o is available. It has | |
2527 | to work even if gdb can not call into the dynamic loader in the inferior | |
2528 | to query it for symbol names and addresses. | |
2529 | ||
2530 | Yes, all those cases should work. Luckily code exists to handle most | |
2531 | of them. The complexity is in selecting exactly what scheme should | |
2532 | be used to perform the inferior call. | |
2533 | ||
2534 | At the current time this routine is known not to handle cases where | |
2535 | the program was linked with HP's compiler without including end.o. | |
2536 | ||
2537 | Please contact Jeff Law (law@cygnus.com) before changing this code. */ | |
c906108c SS |
2538 | |
2539 | CORE_ADDR | |
fba45db2 | 2540 | hppa_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun, int nargs, |
ea7c478f | 2541 | struct value **args, struct type *type, int gcc_p) |
c906108c SS |
2542 | { |
2543 | CORE_ADDR dyncall_addr; | |
2544 | struct minimal_symbol *msymbol; | |
2545 | struct minimal_symbol *trampoline; | |
2546 | int flags = read_register (FLAGS_REGNUM); | |
cce74817 JM |
2547 | struct unwind_table_entry *u = NULL; |
2548 | CORE_ADDR new_stub = 0; | |
2549 | CORE_ADDR solib_handle = 0; | |
2550 | ||
2551 | /* Nonzero if we will use GCC's PLT call routine. This routine must be | |
c2c6d25f JM |
2552 | passed an import stub, not a PLABEL. It is also necessary to set %r19 |
2553 | (the PIC register) before performing the call. | |
c906108c | 2554 | |
cce74817 JM |
2555 | If zero, then we are using __d_plt_call (HP's PLT call routine) or we |
2556 | are calling the target directly. When using __d_plt_call we want to | |
2557 | use a PLABEL instead of an import stub. */ | |
2558 | int using_gcc_plt_call = 1; | |
2559 | ||
53a5351d JM |
2560 | #ifdef GDB_TARGET_IS_HPPA_20W |
2561 | /* We currently use completely different code for the PA2.0W inferior | |
2562 | function call sequences. This needs to be cleaned up. */ | |
2563 | { | |
2564 | CORE_ADDR pcsqh, pcsqt, pcoqh, pcoqt, sr5; | |
2565 | struct target_waitstatus w; | |
2566 | int inst1, inst2; | |
2567 | char buf[4]; | |
2568 | int status; | |
2569 | struct objfile *objfile; | |
2570 | ||
2571 | /* We can not modify the PC space queues directly, so we start | |
2572 | up the inferior and execute a couple instructions to set the | |
2573 | space queues so that they point to the call dummy in the stack. */ | |
2574 | pcsqh = read_register (PCSQ_HEAD_REGNUM); | |
2575 | sr5 = read_register (SR5_REGNUM); | |
2576 | if (1) | |
2577 | { | |
2578 | pcoqh = read_register (PCOQ_HEAD_REGNUM); | |
2579 | pcoqt = read_register (PCOQ_TAIL_REGNUM); | |
2580 | if (target_read_memory (pcoqh, buf, 4) != 0) | |
2581 | error ("Couldn't modify space queue\n"); | |
2582 | inst1 = extract_unsigned_integer (buf, 4); | |
2583 | ||
2584 | if (target_read_memory (pcoqt, buf, 4) != 0) | |
2585 | error ("Couldn't modify space queue\n"); | |
2586 | inst2 = extract_unsigned_integer (buf, 4); | |
2587 | ||
2588 | /* BVE (r1) */ | |
2589 | *((int *) buf) = 0xe820d000; | |
2590 | if (target_write_memory (pcoqh, buf, 4) != 0) | |
2591 | error ("Couldn't modify space queue\n"); | |
2592 | ||
2593 | /* NOP */ | |
2594 | *((int *) buf) = 0x08000240; | |
2595 | if (target_write_memory (pcoqt, buf, 4) != 0) | |
2596 | { | |
2597 | *((int *) buf) = inst1; | |
2598 | target_write_memory (pcoqh, buf, 4); | |
2599 | error ("Couldn't modify space queue\n"); | |
2600 | } | |
2601 | ||
2602 | write_register (1, pc); | |
2603 | ||
2604 | /* Single step twice, the BVE instruction will set the space queue | |
2605 | such that it points to the PC value written immediately above | |
2606 | (ie the call dummy). */ | |
2607 | resume (1, 0); | |
39f77062 | 2608 | target_wait (inferior_ptid, &w); |
53a5351d | 2609 | resume (1, 0); |
39f77062 | 2610 | target_wait (inferior_ptid, &w); |
53a5351d JM |
2611 | |
2612 | /* Restore the two instructions at the old PC locations. */ | |
2613 | *((int *) buf) = inst1; | |
2614 | target_write_memory (pcoqh, buf, 4); | |
2615 | *((int *) buf) = inst2; | |
2616 | target_write_memory (pcoqt, buf, 4); | |
2617 | } | |
2618 | ||
2619 | /* The call dummy wants the ultimate destination address initially | |
2620 | in register %r5. */ | |
2621 | write_register (5, fun); | |
2622 | ||
2623 | /* We need to see if this objfile has a different DP value than our | |
c2c6d25f | 2624 | own (it could be a shared library for example). */ |
53a5351d JM |
2625 | ALL_OBJFILES (objfile) |
2626 | { | |
2627 | struct obj_section *s; | |
2628 | obj_private_data_t *obj_private; | |
2629 | ||
2630 | /* See if FUN is in any section within this shared library. */ | |
2631 | for (s = objfile->sections; s < objfile->sections_end; s++) | |
2632 | if (s->addr <= fun && fun < s->endaddr) | |
2633 | break; | |
2634 | ||
2635 | if (s >= objfile->sections_end) | |
2636 | continue; | |
2637 | ||
2638 | obj_private = (obj_private_data_t *) objfile->obj_private; | |
2639 | ||
2640 | /* The DP value may be different for each objfile. But within an | |
2641 | objfile each function uses the same dp value. Thus we do not need | |
2642 | to grope around the opd section looking for dp values. | |
2643 | ||
2644 | ?!? This is not strictly correct since we may be in a shared library | |
2645 | and want to call back into the main program. To make that case | |
2646 | work correctly we need to set obj_private->dp for the main program's | |
2647 | objfile, then remove this conditional. */ | |
2648 | if (obj_private->dp) | |
2649 | write_register (27, obj_private->dp); | |
2650 | break; | |
2651 | } | |
2652 | return pc; | |
2653 | } | |
2654 | #endif | |
2655 | ||
2656 | #ifndef GDB_TARGET_IS_HPPA_20W | |
cce74817 | 2657 | /* Prefer __gcc_plt_call over the HP supplied routine because |
c5aa993b | 2658 | __gcc_plt_call works for any number of arguments. */ |
c906108c | 2659 | trampoline = NULL; |
cce74817 JM |
2660 | if (lookup_minimal_symbol ("__gcc_plt_call", NULL, NULL) == NULL) |
2661 | using_gcc_plt_call = 0; | |
2662 | ||
c906108c SS |
2663 | msymbol = lookup_minimal_symbol ("$$dyncall", NULL, NULL); |
2664 | if (msymbol == NULL) | |
cce74817 | 2665 | error ("Can't find an address for $$dyncall trampoline"); |
c906108c SS |
2666 | |
2667 | dyncall_addr = SYMBOL_VALUE_ADDRESS (msymbol); | |
2668 | ||
2669 | /* FUN could be a procedure label, in which case we have to get | |
cce74817 JM |
2670 | its real address and the value of its GOT/DP if we plan to |
2671 | call the routine via gcc_plt_call. */ | |
2672 | if ((fun & 0x2) && using_gcc_plt_call) | |
c906108c SS |
2673 | { |
2674 | /* Get the GOT/DP value for the target function. It's | |
c5aa993b JM |
2675 | at *(fun+4). Note the call dummy is *NOT* allowed to |
2676 | trash %r19 before calling the target function. */ | |
53a5351d | 2677 | write_register (19, read_memory_integer ((fun & ~0x3) + 4, |
b1e29e33 | 2678 | DEPRECATED_REGISTER_SIZE)); |
c906108c SS |
2679 | |
2680 | /* Now get the real address for the function we are calling, it's | |
c5aa993b | 2681 | at *fun. */ |
53a5351d JM |
2682 | fun = (CORE_ADDR) read_memory_integer (fun & ~0x3, |
2683 | TARGET_PTR_BIT / 8); | |
c906108c SS |
2684 | } |
2685 | else | |
2686 | { | |
2687 | ||
2688 | #ifndef GDB_TARGET_IS_PA_ELF | |
cce74817 | 2689 | /* FUN could be an export stub, the real address of a function, or |
c5aa993b JM |
2690 | a PLABEL. When using gcc's PLT call routine we must call an import |
2691 | stub rather than the export stub or real function for lazy binding | |
2692 | to work correctly | |
cce74817 | 2693 | |
39f77062 | 2694 | If we are using the gcc PLT call routine, then we need to |
c5aa993b | 2695 | get the import stub for the target function. */ |
cce74817 | 2696 | if (using_gcc_plt_call && som_solib_get_got_by_pc (fun)) |
c906108c SS |
2697 | { |
2698 | struct objfile *objfile; | |
2699 | struct minimal_symbol *funsymbol, *stub_symbol; | |
2700 | CORE_ADDR newfun = 0; | |
2701 | ||
2702 | funsymbol = lookup_minimal_symbol_by_pc (fun); | |
2703 | if (!funsymbol) | |
4ce44c66 | 2704 | error ("Unable to find minimal symbol for target function.\n"); |
c906108c SS |
2705 | |
2706 | /* Search all the object files for an import symbol with the | |
2707 | right name. */ | |
2708 | ALL_OBJFILES (objfile) | |
c5aa993b JM |
2709 | { |
2710 | stub_symbol | |
2711 | = lookup_minimal_symbol_solib_trampoline | |
40324f1b | 2712 | (DEPRECATED_SYMBOL_NAME (funsymbol), objfile); |
c5aa993b JM |
2713 | |
2714 | if (!stub_symbol) | |
22abf04a | 2715 | stub_symbol = lookup_minimal_symbol (DEPRECATED_SYMBOL_NAME (funsymbol), |
c5aa993b JM |
2716 | NULL, objfile); |
2717 | ||
2718 | /* Found a symbol with the right name. */ | |
2719 | if (stub_symbol) | |
2720 | { | |
2721 | struct unwind_table_entry *u; | |
2722 | /* It must be a shared library trampoline. */ | |
2723 | if (MSYMBOL_TYPE (stub_symbol) != mst_solib_trampoline) | |
2724 | continue; | |
2725 | ||
2726 | /* It must also be an import stub. */ | |
2727 | u = find_unwind_entry (SYMBOL_VALUE (stub_symbol)); | |
6426a772 JM |
2728 | if (u == NULL |
2729 | || (u->stub_unwind.stub_type != IMPORT | |
2730 | #ifdef GDB_NATIVE_HPUX_11 | |
2731 | /* Sigh. The hpux 10.20 dynamic linker will blow | |
2732 | chunks if we perform a call to an unbound function | |
2733 | via the IMPORT_SHLIB stub. The hpux 11.00 dynamic | |
2734 | linker will blow chunks if we do not call the | |
2735 | unbound function via the IMPORT_SHLIB stub. | |
2736 | ||
2737 | We currently have no way to select bevahior on just | |
2738 | the target. However, we only support HPUX/SOM in | |
2739 | native mode. So we conditinalize on a native | |
2740 | #ifdef. Ugly. Ugly. Ugly */ | |
2741 | && u->stub_unwind.stub_type != IMPORT_SHLIB | |
2742 | #endif | |
2743 | )) | |
c5aa993b JM |
2744 | continue; |
2745 | ||
2746 | /* OK. Looks like the correct import stub. */ | |
2747 | newfun = SYMBOL_VALUE (stub_symbol); | |
2748 | fun = newfun; | |
6426a772 JM |
2749 | |
2750 | /* If we found an IMPORT stub, then we want to stop | |
2751 | searching now. If we found an IMPORT_SHLIB, we want | |
2752 | to continue the search in the hopes that we will find | |
2753 | an IMPORT stub. */ | |
2754 | if (u->stub_unwind.stub_type == IMPORT) | |
2755 | break; | |
c5aa993b JM |
2756 | } |
2757 | } | |
cce74817 JM |
2758 | |
2759 | /* Ouch. We did not find an import stub. Make an attempt to | |
2760 | do the right thing instead of just croaking. Most of the | |
2761 | time this will actually work. */ | |
c906108c SS |
2762 | if (newfun == 0) |
2763 | write_register (19, som_solib_get_got_by_pc (fun)); | |
cce74817 JM |
2764 | |
2765 | u = find_unwind_entry (fun); | |
c5aa993b | 2766 | if (u |
cce74817 JM |
2767 | && (u->stub_unwind.stub_type == IMPORT |
2768 | || u->stub_unwind.stub_type == IMPORT_SHLIB)) | |
2769 | trampoline = lookup_minimal_symbol ("__gcc_plt_call", NULL, NULL); | |
2770 | ||
2771 | /* If we found the import stub in the shared library, then we have | |
2772 | to set %r19 before we call the stub. */ | |
2773 | if (u && u->stub_unwind.stub_type == IMPORT_SHLIB) | |
2774 | write_register (19, som_solib_get_got_by_pc (fun)); | |
c906108c | 2775 | } |
c906108c SS |
2776 | #endif |
2777 | } | |
2778 | ||
cce74817 JM |
2779 | /* If we are calling into another load module then have sr4export call the |
2780 | magic __d_plt_call routine which is linked in from end.o. | |
c906108c | 2781 | |
cce74817 JM |
2782 | You can't use _sr4export to make the call as the value in sp-24 will get |
2783 | fried and you end up returning to the wrong location. You can't call the | |
2784 | target as the code to bind the PLT entry to a function can't return to a | |
2785 | stack address. | |
2786 | ||
2787 | Also, query the dynamic linker in the inferior to provide a suitable | |
2788 | PLABEL for the target function. */ | |
c5aa993b | 2789 | if (!using_gcc_plt_call) |
c906108c SS |
2790 | { |
2791 | CORE_ADDR new_fun; | |
2792 | ||
cce74817 | 2793 | /* Get a handle for the shared library containing FUN. Given the |
c5aa993b | 2794 | handle we can query the shared library for a PLABEL. */ |
cce74817 | 2795 | solib_handle = som_solib_get_solib_by_pc (fun); |
c906108c | 2796 | |
cce74817 | 2797 | if (solib_handle) |
c906108c | 2798 | { |
cce74817 | 2799 | struct minimal_symbol *fmsymbol = lookup_minimal_symbol_by_pc (fun); |
c906108c | 2800 | |
cce74817 JM |
2801 | trampoline = lookup_minimal_symbol ("__d_plt_call", NULL, NULL); |
2802 | ||
2803 | if (trampoline == NULL) | |
2804 | { | |
2805 | error ("Can't find an address for __d_plt_call or __gcc_plt_call trampoline\nSuggest linking executable with -g or compiling with gcc."); | |
2806 | } | |
2807 | ||
2808 | /* This is where sr4export will jump to. */ | |
2809 | new_fun = SYMBOL_VALUE_ADDRESS (trampoline); | |
2810 | ||
2811 | /* If the function is in a shared library, then call __d_shl_get to | |
2812 | get a PLABEL for the target function. */ | |
2813 | new_stub = find_stub_with_shl_get (fmsymbol, solib_handle); | |
2814 | ||
c5aa993b | 2815 | if (new_stub == 0) |
22abf04a | 2816 | error ("Can't find an import stub for %s", DEPRECATED_SYMBOL_NAME (fmsymbol)); |
c906108c SS |
2817 | |
2818 | /* We have to store the address of the stub in __shlib_funcptr. */ | |
cce74817 | 2819 | msymbol = lookup_minimal_symbol ("__shlib_funcptr", NULL, |
c5aa993b | 2820 | (struct objfile *) NULL); |
c906108c | 2821 | |
cce74817 JM |
2822 | if (msymbol == NULL) |
2823 | error ("Can't find an address for __shlib_funcptr"); | |
2824 | target_write_memory (SYMBOL_VALUE_ADDRESS (msymbol), | |
c5aa993b | 2825 | (char *) &new_stub, 4); |
c906108c SS |
2826 | |
2827 | /* We want sr4export to call __d_plt_call, so we claim it is | |
2828 | the final target. Clear trampoline. */ | |
cce74817 JM |
2829 | fun = new_fun; |
2830 | trampoline = NULL; | |
c906108c SS |
2831 | } |
2832 | } | |
2833 | ||
2834 | /* Store upper 21 bits of function address into ldil. fun will either be | |
2835 | the final target (most cases) or __d_plt_call when calling into a shared | |
2836 | library and __gcc_plt_call is not available. */ | |
2837 | store_unsigned_integer | |
2838 | (&dummy[FUNC_LDIL_OFFSET], | |
2839 | INSTRUCTION_SIZE, | |
2840 | deposit_21 (fun >> 11, | |
2841 | extract_unsigned_integer (&dummy[FUNC_LDIL_OFFSET], | |
2842 | INSTRUCTION_SIZE))); | |
2843 | ||
2844 | /* Store lower 11 bits of function address into ldo */ | |
2845 | store_unsigned_integer | |
2846 | (&dummy[FUNC_LDO_OFFSET], | |
2847 | INSTRUCTION_SIZE, | |
2848 | deposit_14 (fun & MASK_11, | |
2849 | extract_unsigned_integer (&dummy[FUNC_LDO_OFFSET], | |
2850 | INSTRUCTION_SIZE))); | |
2851 | #ifdef SR4EXPORT_LDIL_OFFSET | |
2852 | ||
2853 | { | |
2854 | CORE_ADDR trampoline_addr; | |
2855 | ||
2856 | /* We may still need sr4export's address too. */ | |
2857 | ||
2858 | if (trampoline == NULL) | |
2859 | { | |
2860 | msymbol = lookup_minimal_symbol ("_sr4export", NULL, NULL); | |
2861 | if (msymbol == NULL) | |
cce74817 | 2862 | error ("Can't find an address for _sr4export trampoline"); |
c906108c SS |
2863 | |
2864 | trampoline_addr = SYMBOL_VALUE_ADDRESS (msymbol); | |
2865 | } | |
2866 | else | |
2867 | trampoline_addr = SYMBOL_VALUE_ADDRESS (trampoline); | |
2868 | ||
2869 | ||
2870 | /* Store upper 21 bits of trampoline's address into ldil */ | |
2871 | store_unsigned_integer | |
2872 | (&dummy[SR4EXPORT_LDIL_OFFSET], | |
2873 | INSTRUCTION_SIZE, | |
2874 | deposit_21 (trampoline_addr >> 11, | |
2875 | extract_unsigned_integer (&dummy[SR4EXPORT_LDIL_OFFSET], | |
2876 | INSTRUCTION_SIZE))); | |
2877 | ||
2878 | /* Store lower 11 bits of trampoline's address into ldo */ | |
2879 | store_unsigned_integer | |
2880 | (&dummy[SR4EXPORT_LDO_OFFSET], | |
2881 | INSTRUCTION_SIZE, | |
2882 | deposit_14 (trampoline_addr & MASK_11, | |
2883 | extract_unsigned_integer (&dummy[SR4EXPORT_LDO_OFFSET], | |
2884 | INSTRUCTION_SIZE))); | |
2885 | } | |
2886 | #endif | |
2887 | ||
2888 | write_register (22, pc); | |
2889 | ||
2890 | /* If we are in a syscall, then we should call the stack dummy | |
2891 | directly. $$dyncall is not needed as the kernel sets up the | |
2892 | space id registers properly based on the value in %r31. In | |
2893 | fact calling $$dyncall will not work because the value in %r22 | |
2894 | will be clobbered on the syscall exit path. | |
2895 | ||
2896 | Similarly if the current PC is in a shared library. Note however, | |
2897 | this scheme won't work if the shared library isn't mapped into | |
2898 | the same space as the stack. */ | |
2899 | if (flags & 2) | |
2900 | return pc; | |
2901 | #ifndef GDB_TARGET_IS_PA_ELF | |
60383d10 | 2902 | else if (som_solib_get_got_by_pc (hppa_target_read_pc (inferior_ptid))) |
c906108c SS |
2903 | return pc; |
2904 | #endif | |
2905 | else | |
2906 | return dyncall_addr; | |
53a5351d | 2907 | #endif |
c906108c SS |
2908 | } |
2909 | ||
c906108c SS |
2910 | /* If the pid is in a syscall, then the FP register is not readable. |
2911 | We'll return zero in that case, rather than attempting to read it | |
2912 | and cause a warning. */ | |
60383d10 | 2913 | |
c906108c | 2914 | CORE_ADDR |
60383d10 | 2915 | hppa_read_fp (int pid) |
c906108c SS |
2916 | { |
2917 | int flags = read_register (FLAGS_REGNUM); | |
2918 | ||
c5aa993b JM |
2919 | if (flags & 2) |
2920 | { | |
2921 | return (CORE_ADDR) 0; | |
2922 | } | |
c906108c SS |
2923 | |
2924 | /* This is the only site that may directly read_register () the FP | |
0ba6dca9 AC |
2925 | register. All others must use deprecated_read_fp (). */ |
2926 | return read_register (DEPRECATED_FP_REGNUM); | |
c906108c SS |
2927 | } |
2928 | ||
60383d10 JB |
2929 | CORE_ADDR |
2930 | hppa_target_read_fp (void) | |
2931 | { | |
2932 | return hppa_read_fp (PIDGET (inferior_ptid)); | |
2933 | } | |
c906108c SS |
2934 | |
2935 | /* Get the PC from %r31 if currently in a syscall. Also mask out privilege | |
2936 | bits. */ | |
2937 | ||
2938 | CORE_ADDR | |
60383d10 | 2939 | hppa_target_read_pc (ptid_t ptid) |
c906108c | 2940 | { |
39f77062 | 2941 | int flags = read_register_pid (FLAGS_REGNUM, ptid); |
c906108c SS |
2942 | |
2943 | /* The following test does not belong here. It is OS-specific, and belongs | |
2944 | in native code. */ | |
2945 | /* Test SS_INSYSCALL */ | |
2946 | if (flags & 2) | |
39f77062 | 2947 | return read_register_pid (31, ptid) & ~0x3; |
c906108c | 2948 | |
39f77062 | 2949 | return read_register_pid (PC_REGNUM, ptid) & ~0x3; |
c906108c SS |
2950 | } |
2951 | ||
2952 | /* Write out the PC. If currently in a syscall, then also write the new | |
2953 | PC value into %r31. */ | |
2954 | ||
2955 | void | |
60383d10 | 2956 | hppa_target_write_pc (CORE_ADDR v, ptid_t ptid) |
c906108c | 2957 | { |
39f77062 | 2958 | int flags = read_register_pid (FLAGS_REGNUM, ptid); |
c906108c SS |
2959 | |
2960 | /* The following test does not belong here. It is OS-specific, and belongs | |
2961 | in native code. */ | |
2962 | /* If in a syscall, then set %r31. Also make sure to get the | |
2963 | privilege bits set correctly. */ | |
2964 | /* Test SS_INSYSCALL */ | |
2965 | if (flags & 2) | |
39f77062 | 2966 | write_register_pid (31, v | 0x3, ptid); |
c906108c | 2967 | |
39f77062 | 2968 | write_register_pid (PC_REGNUM, v, ptid); |
adc11376 | 2969 | write_register_pid (PCOQ_TAIL_REGNUM, v + 4, ptid); |
c906108c SS |
2970 | } |
2971 | ||
2972 | /* return the alignment of a type in bytes. Structures have the maximum | |
2973 | alignment required by their fields. */ | |
2974 | ||
2975 | static int | |
fba45db2 | 2976 | hppa_alignof (struct type *type) |
c906108c SS |
2977 | { |
2978 | int max_align, align, i; | |
2979 | CHECK_TYPEDEF (type); | |
2980 | switch (TYPE_CODE (type)) | |
2981 | { | |
2982 | case TYPE_CODE_PTR: | |
2983 | case TYPE_CODE_INT: | |
2984 | case TYPE_CODE_FLT: | |
2985 | return TYPE_LENGTH (type); | |
2986 | case TYPE_CODE_ARRAY: | |
2987 | return hppa_alignof (TYPE_FIELD_TYPE (type, 0)); | |
2988 | case TYPE_CODE_STRUCT: | |
2989 | case TYPE_CODE_UNION: | |
2990 | max_align = 1; | |
2991 | for (i = 0; i < TYPE_NFIELDS (type); i++) | |
2992 | { | |
2993 | /* Bit fields have no real alignment. */ | |
2994 | /* if (!TYPE_FIELD_BITPOS (type, i)) */ | |
c5aa993b | 2995 | if (!TYPE_FIELD_BITSIZE (type, i)) /* elz: this should be bitsize */ |
c906108c SS |
2996 | { |
2997 | align = hppa_alignof (TYPE_FIELD_TYPE (type, i)); | |
2998 | max_align = max (max_align, align); | |
2999 | } | |
3000 | } | |
3001 | return max_align; | |
3002 | default: | |
3003 | return 4; | |
3004 | } | |
3005 | } | |
3006 | ||
3007 | /* Print the register regnum, or all registers if regnum is -1 */ | |
3008 | ||
3009 | void | |
fba45db2 | 3010 | pa_do_registers_info (int regnum, int fpregs) |
c906108c | 3011 | { |
b8b527c5 | 3012 | char *raw_regs = alloca (DEPRECATED_REGISTER_BYTES); |
c906108c SS |
3013 | int i; |
3014 | ||
3015 | /* Make a copy of gdb's save area (may cause actual | |
3016 | reads from the target). */ | |
3017 | for (i = 0; i < NUM_REGS; i++) | |
62700349 AC |
3018 | frame_register_read (deprecated_selected_frame, i, |
3019 | raw_regs + DEPRECATED_REGISTER_BYTE (i)); | |
c906108c SS |
3020 | |
3021 | if (regnum == -1) | |
3022 | pa_print_registers (raw_regs, regnum, fpregs); | |
c5aa993b JM |
3023 | else if (regnum < FP4_REGNUM) |
3024 | { | |
3025 | long reg_val[2]; | |
3026 | ||
3027 | /* Why is the value not passed through "extract_signed_integer" | |
3028 | as in "pa_print_registers" below? */ | |
3029 | pa_register_look_aside (raw_regs, regnum, ®_val[0]); | |
3030 | ||
3031 | if (!is_pa_2) | |
3032 | { | |
ce414844 | 3033 | printf_unfiltered ("%s %lx\n", REGISTER_NAME (regnum), reg_val[1]); |
c5aa993b | 3034 | } |
c906108c | 3035 | else |
c5aa993b JM |
3036 | { |
3037 | /* Fancy % formats to prevent leading zeros. */ | |
3038 | if (reg_val[0] == 0) | |
ce414844 | 3039 | printf_unfiltered ("%s %lx\n", REGISTER_NAME (regnum), reg_val[1]); |
c5aa993b | 3040 | else |
ce414844 | 3041 | printf_unfiltered ("%s %lx%8.8lx\n", REGISTER_NAME (regnum), |
c5aa993b JM |
3042 | reg_val[0], reg_val[1]); |
3043 | } | |
c906108c | 3044 | } |
c906108c | 3045 | else |
c5aa993b JM |
3046 | /* Note that real floating point values only start at |
3047 | FP4_REGNUM. FP0 and up are just status and error | |
3048 | registers, which have integral (bit) values. */ | |
c906108c SS |
3049 | pa_print_fp_reg (regnum); |
3050 | } | |
3051 | ||
3052 | /********** new function ********************/ | |
3053 | void | |
fba45db2 KB |
3054 | pa_do_strcat_registers_info (int regnum, int fpregs, struct ui_file *stream, |
3055 | enum precision_type precision) | |
c906108c | 3056 | { |
b8b527c5 | 3057 | char *raw_regs = alloca (DEPRECATED_REGISTER_BYTES); |
c906108c SS |
3058 | int i; |
3059 | ||
3060 | /* Make a copy of gdb's save area (may cause actual | |
c5aa993b | 3061 | reads from the target). */ |
c906108c | 3062 | for (i = 0; i < NUM_REGS; i++) |
62700349 AC |
3063 | frame_register_read (deprecated_selected_frame, i, |
3064 | raw_regs + DEPRECATED_REGISTER_BYTE (i)); | |
c906108c SS |
3065 | |
3066 | if (regnum == -1) | |
3067 | pa_strcat_registers (raw_regs, regnum, fpregs, stream); | |
3068 | ||
c5aa993b JM |
3069 | else if (regnum < FP4_REGNUM) |
3070 | { | |
3071 | long reg_val[2]; | |
3072 | ||
3073 | /* Why is the value not passed through "extract_signed_integer" | |
3074 | as in "pa_print_registers" below? */ | |
3075 | pa_register_look_aside (raw_regs, regnum, ®_val[0]); | |
c906108c | 3076 | |
c5aa993b JM |
3077 | if (!is_pa_2) |
3078 | { | |
ce414844 | 3079 | fprintf_unfiltered (stream, "%s %lx", REGISTER_NAME (regnum), reg_val[1]); |
c5aa993b | 3080 | } |
c906108c | 3081 | else |
c5aa993b JM |
3082 | { |
3083 | /* Fancy % formats to prevent leading zeros. */ | |
3084 | if (reg_val[0] == 0) | |
ce414844 | 3085 | fprintf_unfiltered (stream, "%s %lx", REGISTER_NAME (regnum), |
c5aa993b JM |
3086 | reg_val[1]); |
3087 | else | |
ce414844 | 3088 | fprintf_unfiltered (stream, "%s %lx%8.8lx", REGISTER_NAME (regnum), |
c5aa993b JM |
3089 | reg_val[0], reg_val[1]); |
3090 | } | |
c906108c | 3091 | } |
c906108c | 3092 | else |
c5aa993b JM |
3093 | /* Note that real floating point values only start at |
3094 | FP4_REGNUM. FP0 and up are just status and error | |
3095 | registers, which have integral (bit) values. */ | |
c906108c SS |
3096 | pa_strcat_fp_reg (regnum, stream, precision); |
3097 | } | |
3098 | ||
3099 | /* If this is a PA2.0 machine, fetch the real 64-bit register | |
3100 | value. Otherwise use the info from gdb's saved register area. | |
3101 | ||
3102 | Note that reg_val is really expected to be an array of longs, | |
3103 | with two elements. */ | |
3104 | static void | |
fba45db2 | 3105 | pa_register_look_aside (char *raw_regs, int regnum, long *raw_val) |
c906108c | 3106 | { |
c5aa993b | 3107 | static int know_which = 0; /* False */ |
c906108c | 3108 | |
c5aa993b | 3109 | int regaddr; |
c906108c | 3110 | unsigned int offset; |
52f0bd74 | 3111 | int i; |
c5aa993b JM |
3112 | int start; |
3113 | ||
3114 | ||
123a958e | 3115 | char buf[MAX_REGISTER_SIZE]; |
c906108c SS |
3116 | long long reg_val; |
3117 | ||
c5aa993b JM |
3118 | if (!know_which) |
3119 | { | |
3120 | if (CPU_PA_RISC2_0 == sysconf (_SC_CPU_VERSION)) | |
3121 | { | |
3122 | is_pa_2 = (1 == 1); | |
3123 | } | |
3124 | ||
3125 | know_which = 1; /* True */ | |
3126 | } | |
c906108c SS |
3127 | |
3128 | raw_val[0] = 0; | |
3129 | raw_val[1] = 0; | |
3130 | ||
c5aa993b JM |
3131 | if (!is_pa_2) |
3132 | { | |
62700349 | 3133 | raw_val[1] = *(long *) (raw_regs + DEPRECATED_REGISTER_BYTE (regnum)); |
c906108c | 3134 | return; |
c5aa993b | 3135 | } |
c906108c SS |
3136 | |
3137 | /* Code below copied from hppah-nat.c, with fixes for wide | |
3138 | registers, using different area of save_state, etc. */ | |
3139 | if (regnum == FLAGS_REGNUM || regnum >= FP0_REGNUM || | |
c5aa993b JM |
3140 | !HAVE_STRUCT_SAVE_STATE_T || !HAVE_STRUCT_MEMBER_SS_WIDE) |
3141 | { | |
c906108c | 3142 | /* Use narrow regs area of save_state and default macro. */ |
c5aa993b JM |
3143 | offset = U_REGS_OFFSET; |
3144 | regaddr = register_addr (regnum, offset); | |
3145 | start = 1; | |
3146 | } | |
3147 | else | |
3148 | { | |
c906108c SS |
3149 | /* Use wide regs area, and calculate registers as 8 bytes wide. |
3150 | ||
3151 | We'd like to do this, but current version of "C" doesn't | |
3152 | permit "offsetof": | |
3153 | ||
c5aa993b | 3154 | offset = offsetof(save_state_t, ss_wide); |
c906108c SS |
3155 | |
3156 | Note that to avoid "C" doing typed pointer arithmetic, we | |
3157 | have to cast away the type in our offset calculation: | |
3158 | otherwise we get an offset of 1! */ | |
3159 | ||
7a292a7a | 3160 | /* NB: save_state_t is not available before HPUX 9. |
c5aa993b | 3161 | The ss_wide field is not available previous to HPUX 10.20, |
7a292a7a SS |
3162 | so to avoid compile-time warnings, we only compile this for |
3163 | PA 2.0 processors. This control path should only be followed | |
3164 | if we're debugging a PA 2.0 processor, so this should not cause | |
3165 | problems. */ | |
3166 | ||
c906108c SS |
3167 | /* #if the following code out so that this file can still be |
3168 | compiled on older HPUX boxes (< 10.20) which don't have | |
3169 | this structure/structure member. */ | |
3170 | #if HAVE_STRUCT_SAVE_STATE_T == 1 && HAVE_STRUCT_MEMBER_SS_WIDE == 1 | |
3171 | save_state_t temp; | |
3172 | ||
3173 | offset = ((int) &temp.ss_wide) - ((int) &temp); | |
3174 | regaddr = offset + regnum * 8; | |
c5aa993b | 3175 | start = 0; |
c906108c | 3176 | #endif |
c5aa993b JM |
3177 | } |
3178 | ||
3179 | for (i = start; i < 2; i++) | |
c906108c SS |
3180 | { |
3181 | errno = 0; | |
39f77062 | 3182 | raw_val[i] = call_ptrace (PT_RUREGS, PIDGET (inferior_ptid), |
c5aa993b | 3183 | (PTRACE_ARG3_TYPE) regaddr, 0); |
c906108c SS |
3184 | if (errno != 0) |
3185 | { | |
3186 | /* Warning, not error, in case we are attached; sometimes the | |
3187 | kernel doesn't let us at the registers. */ | |
3188 | char *err = safe_strerror (errno); | |
3189 | char *msg = alloca (strlen (err) + 128); | |
3190 | sprintf (msg, "reading register %s: %s", REGISTER_NAME (regnum), err); | |
3191 | warning (msg); | |
3192 | goto error_exit; | |
3193 | } | |
3194 | ||
3195 | regaddr += sizeof (long); | |
3196 | } | |
c5aa993b | 3197 | |
c906108c | 3198 | if (regnum == PCOQ_HEAD_REGNUM || regnum == PCOQ_TAIL_REGNUM) |
c5aa993b | 3199 | raw_val[1] &= ~0x3; /* I think we're masking out space bits */ |
c906108c SS |
3200 | |
3201 | error_exit: | |
3202 | ; | |
3203 | } | |
3204 | ||
3205 | /* "Info all-reg" command */ | |
c5aa993b | 3206 | |
c906108c | 3207 | static void |
fba45db2 | 3208 | pa_print_registers (char *raw_regs, int regnum, int fpregs) |
c906108c | 3209 | { |
c5aa993b | 3210 | int i, j; |
adf40b2e JM |
3211 | /* Alas, we are compiled so that "long long" is 32 bits */ |
3212 | long raw_val[2]; | |
c906108c | 3213 | long long_val; |
a0b3c4fd | 3214 | int rows = 48, columns = 2; |
c906108c | 3215 | |
adf40b2e | 3216 | for (i = 0; i < rows; i++) |
c906108c | 3217 | { |
adf40b2e | 3218 | for (j = 0; j < columns; j++) |
c906108c | 3219 | { |
adf40b2e JM |
3220 | /* We display registers in column-major order. */ |
3221 | int regnum = i + j * rows; | |
3222 | ||
c5aa993b JM |
3223 | /* Q: Why is the value passed through "extract_signed_integer", |
3224 | while above, in "pa_do_registers_info" it isn't? | |
3225 | A: ? */ | |
adf40b2e | 3226 | pa_register_look_aside (raw_regs, regnum, &raw_val[0]); |
c5aa993b JM |
3227 | |
3228 | /* Even fancier % formats to prevent leading zeros | |
3229 | and still maintain the output in columns. */ | |
3230 | if (!is_pa_2) | |
3231 | { | |
3232 | /* Being big-endian, on this machine the low bits | |
3233 | (the ones we want to look at) are in the second longword. */ | |
3234 | long_val = extract_signed_integer (&raw_val[1], 4); | |
ce414844 | 3235 | printf_filtered ("%10.10s: %8lx ", |
adf40b2e | 3236 | REGISTER_NAME (regnum), long_val); |
c5aa993b JM |
3237 | } |
3238 | else | |
3239 | { | |
3240 | /* raw_val = extract_signed_integer(&raw_val, 8); */ | |
3241 | if (raw_val[0] == 0) | |
ce414844 | 3242 | printf_filtered ("%10.10s: %8lx ", |
adf40b2e | 3243 | REGISTER_NAME (regnum), raw_val[1]); |
c5aa993b | 3244 | else |
ce414844 | 3245 | printf_filtered ("%10.10s: %8lx%8.8lx ", |
a0b3c4fd | 3246 | REGISTER_NAME (regnum), |
c5aa993b JM |
3247 | raw_val[0], raw_val[1]); |
3248 | } | |
c906108c SS |
3249 | } |
3250 | printf_unfiltered ("\n"); | |
3251 | } | |
c5aa993b | 3252 | |
c906108c | 3253 | if (fpregs) |
c5aa993b | 3254 | for (i = FP4_REGNUM; i < NUM_REGS; i++) /* FP4_REGNUM == 72 */ |
c906108c SS |
3255 | pa_print_fp_reg (i); |
3256 | } | |
3257 | ||
c5aa993b | 3258 | /************* new function ******************/ |
c906108c | 3259 | static void |
fba45db2 KB |
3260 | pa_strcat_registers (char *raw_regs, int regnum, int fpregs, |
3261 | struct ui_file *stream) | |
c906108c | 3262 | { |
c5aa993b JM |
3263 | int i, j; |
3264 | long raw_val[2]; /* Alas, we are compiled so that "long long" is 32 bits */ | |
c906108c SS |
3265 | long long_val; |
3266 | enum precision_type precision; | |
3267 | ||
3268 | precision = unspecified_precision; | |
3269 | ||
3270 | for (i = 0; i < 18; i++) | |
3271 | { | |
3272 | for (j = 0; j < 4; j++) | |
3273 | { | |
c5aa993b JM |
3274 | /* Q: Why is the value passed through "extract_signed_integer", |
3275 | while above, in "pa_do_registers_info" it isn't? | |
3276 | A: ? */ | |
3277 | pa_register_look_aside (raw_regs, i + (j * 18), &raw_val[0]); | |
3278 | ||
3279 | /* Even fancier % formats to prevent leading zeros | |
3280 | and still maintain the output in columns. */ | |
3281 | if (!is_pa_2) | |
3282 | { | |
3283 | /* Being big-endian, on this machine the low bits | |
3284 | (the ones we want to look at) are in the second longword. */ | |
3285 | long_val = extract_signed_integer (&raw_val[1], 4); | |
ce414844 AC |
3286 | fprintf_filtered (stream, "%8.8s: %8lx ", |
3287 | REGISTER_NAME (i + (j * 18)), long_val); | |
c5aa993b JM |
3288 | } |
3289 | else | |
3290 | { | |
3291 | /* raw_val = extract_signed_integer(&raw_val, 8); */ | |
3292 | if (raw_val[0] == 0) | |
ce414844 AC |
3293 | fprintf_filtered (stream, "%8.8s: %8lx ", |
3294 | REGISTER_NAME (i + (j * 18)), raw_val[1]); | |
c5aa993b | 3295 | else |
ce414844 AC |
3296 | fprintf_filtered (stream, "%8.8s: %8lx%8.8lx ", |
3297 | REGISTER_NAME (i + (j * 18)), raw_val[0], | |
3298 | raw_val[1]); | |
c5aa993b | 3299 | } |
c906108c SS |
3300 | } |
3301 | fprintf_unfiltered (stream, "\n"); | |
3302 | } | |
c5aa993b | 3303 | |
c906108c | 3304 | if (fpregs) |
c5aa993b | 3305 | for (i = FP4_REGNUM; i < NUM_REGS; i++) /* FP4_REGNUM == 72 */ |
c906108c SS |
3306 | pa_strcat_fp_reg (i, stream, precision); |
3307 | } | |
3308 | ||
3309 | static void | |
fba45db2 | 3310 | pa_print_fp_reg (int i) |
c906108c | 3311 | { |
123a958e AC |
3312 | char raw_buffer[MAX_REGISTER_SIZE]; |
3313 | char virtual_buffer[MAX_REGISTER_SIZE]; | |
c906108c SS |
3314 | |
3315 | /* Get 32bits of data. */ | |
6e7f8b9c | 3316 | frame_register_read (deprecated_selected_frame, i, raw_buffer); |
c906108c SS |
3317 | |
3318 | /* Put it in the buffer. No conversions are ever necessary. */ | |
12c266ea | 3319 | memcpy (virtual_buffer, raw_buffer, DEPRECATED_REGISTER_RAW_SIZE (i)); |
c906108c SS |
3320 | |
3321 | fputs_filtered (REGISTER_NAME (i), gdb_stdout); | |
3322 | print_spaces_filtered (8 - strlen (REGISTER_NAME (i)), gdb_stdout); | |
3323 | fputs_filtered ("(single precision) ", gdb_stdout); | |
3324 | ||
2e092625 | 3325 | val_print (DEPRECATED_REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0, gdb_stdout, 0, |
c906108c SS |
3326 | 1, 0, Val_pretty_default); |
3327 | printf_filtered ("\n"); | |
3328 | ||
3329 | /* If "i" is even, then this register can also be a double-precision | |
3330 | FP register. Dump it out as such. */ | |
3331 | if ((i % 2) == 0) | |
3332 | { | |
3333 | /* Get the data in raw format for the 2nd half. */ | |
6e7f8b9c | 3334 | frame_register_read (deprecated_selected_frame, i + 1, raw_buffer); |
c906108c SS |
3335 | |
3336 | /* Copy it into the appropriate part of the virtual buffer. */ | |
12c266ea AC |
3337 | memcpy (virtual_buffer + DEPRECATED_REGISTER_RAW_SIZE (i), raw_buffer, |
3338 | DEPRECATED_REGISTER_RAW_SIZE (i)); | |
c906108c SS |
3339 | |
3340 | /* Dump it as a double. */ | |
3341 | fputs_filtered (REGISTER_NAME (i), gdb_stdout); | |
3342 | print_spaces_filtered (8 - strlen (REGISTER_NAME (i)), gdb_stdout); | |
3343 | fputs_filtered ("(double precision) ", gdb_stdout); | |
3344 | ||
3345 | val_print (builtin_type_double, virtual_buffer, 0, 0, gdb_stdout, 0, | |
3346 | 1, 0, Val_pretty_default); | |
3347 | printf_filtered ("\n"); | |
3348 | } | |
3349 | } | |
3350 | ||
3351 | /*************** new function ***********************/ | |
3352 | static void | |
fba45db2 | 3353 | pa_strcat_fp_reg (int i, struct ui_file *stream, enum precision_type precision) |
c906108c | 3354 | { |
123a958e AC |
3355 | char raw_buffer[MAX_REGISTER_SIZE]; |
3356 | char virtual_buffer[MAX_REGISTER_SIZE]; | |
c906108c SS |
3357 | |
3358 | fputs_filtered (REGISTER_NAME (i), stream); | |
3359 | print_spaces_filtered (8 - strlen (REGISTER_NAME (i)), stream); | |
3360 | ||
3361 | /* Get 32bits of data. */ | |
6e7f8b9c | 3362 | frame_register_read (deprecated_selected_frame, i, raw_buffer); |
c906108c SS |
3363 | |
3364 | /* Put it in the buffer. No conversions are ever necessary. */ | |
12c266ea | 3365 | memcpy (virtual_buffer, raw_buffer, DEPRECATED_REGISTER_RAW_SIZE (i)); |
c906108c SS |
3366 | |
3367 | if (precision == double_precision && (i % 2) == 0) | |
3368 | { | |
3369 | ||
123a958e | 3370 | char raw_buf[MAX_REGISTER_SIZE]; |
c5aa993b JM |
3371 | |
3372 | /* Get the data in raw format for the 2nd half. */ | |
6e7f8b9c | 3373 | frame_register_read (deprecated_selected_frame, i + 1, raw_buf); |
c5aa993b JM |
3374 | |
3375 | /* Copy it into the appropriate part of the virtual buffer. */ | |
12c266ea AC |
3376 | memcpy (virtual_buffer + DEPRECATED_REGISTER_RAW_SIZE (i), raw_buf, |
3377 | DEPRECATED_REGISTER_RAW_SIZE (i)); | |
c906108c | 3378 | |
c5aa993b JM |
3379 | val_print (builtin_type_double, virtual_buffer, 0, 0, stream, 0, |
3380 | 1, 0, Val_pretty_default); | |
c906108c SS |
3381 | |
3382 | } | |
c5aa993b JM |
3383 | else |
3384 | { | |
2e092625 | 3385 | val_print (DEPRECATED_REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0, stream, 0, |
c5aa993b JM |
3386 | 1, 0, Val_pretty_default); |
3387 | } | |
c906108c SS |
3388 | |
3389 | } | |
3390 | ||
3391 | /* Return one if PC is in the call path of a trampoline, else return zero. | |
3392 | ||
3393 | Note we return one for *any* call trampoline (long-call, arg-reloc), not | |
3394 | just shared library trampolines (import, export). */ | |
3395 | ||
3396 | int | |
60383d10 | 3397 | hppa_in_solib_call_trampoline (CORE_ADDR pc, char *name) |
c906108c SS |
3398 | { |
3399 | struct minimal_symbol *minsym; | |
3400 | struct unwind_table_entry *u; | |
3401 | static CORE_ADDR dyncall = 0; | |
3402 | static CORE_ADDR sr4export = 0; | |
3403 | ||
c2c6d25f JM |
3404 | #ifdef GDB_TARGET_IS_HPPA_20W |
3405 | /* PA64 has a completely different stub/trampoline scheme. Is it | |
3406 | better? Maybe. It's certainly harder to determine with any | |
3407 | certainty that we are in a stub because we can not refer to the | |
3408 | unwinders to help. | |
3409 | ||
3410 | The heuristic is simple. Try to lookup the current PC value in th | |
3411 | minimal symbol table. If that fails, then assume we are not in a | |
3412 | stub and return. | |
3413 | ||
3414 | Then see if the PC value falls within the section bounds for the | |
3415 | section containing the minimal symbol we found in the first | |
3416 | step. If it does, then assume we are not in a stub and return. | |
3417 | ||
3418 | Finally peek at the instructions to see if they look like a stub. */ | |
3419 | { | |
3420 | struct minimal_symbol *minsym; | |
3421 | asection *sec; | |
3422 | CORE_ADDR addr; | |
3423 | int insn, i; | |
3424 | ||
3425 | minsym = lookup_minimal_symbol_by_pc (pc); | |
3426 | if (! minsym) | |
3427 | return 0; | |
3428 | ||
3429 | sec = SYMBOL_BFD_SECTION (minsym); | |
3430 | ||
b98ed7be AM |
3431 | if (bfd_get_section_vma (sec->owner, sec) <= pc |
3432 | && pc < (bfd_get_section_vma (sec->owner, sec) | |
3433 | + bfd_section_size (sec->owner, sec))) | |
c2c6d25f JM |
3434 | return 0; |
3435 | ||
3436 | /* We might be in a stub. Peek at the instructions. Stubs are 3 | |
3437 | instructions long. */ | |
3438 | insn = read_memory_integer (pc, 4); | |
3439 | ||
b84a8afe | 3440 | /* Find out where we think we are within the stub. */ |
c2c6d25f JM |
3441 | if ((insn & 0xffffc00e) == 0x53610000) |
3442 | addr = pc; | |
3443 | else if ((insn & 0xffffffff) == 0xe820d000) | |
3444 | addr = pc - 4; | |
3445 | else if ((insn & 0xffffc00e) == 0x537b0000) | |
3446 | addr = pc - 8; | |
3447 | else | |
3448 | return 0; | |
3449 | ||
3450 | /* Now verify each insn in the range looks like a stub instruction. */ | |
3451 | insn = read_memory_integer (addr, 4); | |
3452 | if ((insn & 0xffffc00e) != 0x53610000) | |
3453 | return 0; | |
3454 | ||
3455 | /* Now verify each insn in the range looks like a stub instruction. */ | |
3456 | insn = read_memory_integer (addr + 4, 4); | |
3457 | if ((insn & 0xffffffff) != 0xe820d000) | |
3458 | return 0; | |
3459 | ||
3460 | /* Now verify each insn in the range looks like a stub instruction. */ | |
3461 | insn = read_memory_integer (addr + 8, 4); | |
3462 | if ((insn & 0xffffc00e) != 0x537b0000) | |
3463 | return 0; | |
3464 | ||
3465 | /* Looks like a stub. */ | |
3466 | return 1; | |
3467 | } | |
3468 | #endif | |
3469 | ||
3470 | /* FIXME XXX - dyncall and sr4export must be initialized whenever we get a | |
3471 | new exec file */ | |
c906108c SS |
3472 | |
3473 | /* First see if PC is in one of the two C-library trampolines. */ | |
3474 | if (!dyncall) | |
3475 | { | |
3476 | minsym = lookup_minimal_symbol ("$$dyncall", NULL, NULL); | |
3477 | if (minsym) | |
3478 | dyncall = SYMBOL_VALUE_ADDRESS (minsym); | |
3479 | else | |
3480 | dyncall = -1; | |
3481 | } | |
3482 | ||
3483 | if (!sr4export) | |
3484 | { | |
3485 | minsym = lookup_minimal_symbol ("_sr4export", NULL, NULL); | |
3486 | if (minsym) | |
3487 | sr4export = SYMBOL_VALUE_ADDRESS (minsym); | |
3488 | else | |
3489 | sr4export = -1; | |
3490 | } | |
3491 | ||
3492 | if (pc == dyncall || pc == sr4export) | |
3493 | return 1; | |
3494 | ||
104c1213 | 3495 | minsym = lookup_minimal_symbol_by_pc (pc); |
22abf04a | 3496 | if (minsym && strcmp (DEPRECATED_SYMBOL_NAME (minsym), ".stub") == 0) |
104c1213 JM |
3497 | return 1; |
3498 | ||
c906108c SS |
3499 | /* Get the unwind descriptor corresponding to PC, return zero |
3500 | if no unwind was found. */ | |
3501 | u = find_unwind_entry (pc); | |
3502 | if (!u) | |
3503 | return 0; | |
3504 | ||
3505 | /* If this isn't a linker stub, then return now. */ | |
3506 | if (u->stub_unwind.stub_type == 0) | |
3507 | return 0; | |
3508 | ||
3509 | /* By definition a long-branch stub is a call stub. */ | |
3510 | if (u->stub_unwind.stub_type == LONG_BRANCH) | |
3511 | return 1; | |
3512 | ||
3513 | /* The call and return path execute the same instructions within | |
3514 | an IMPORT stub! So an IMPORT stub is both a call and return | |
3515 | trampoline. */ | |
3516 | if (u->stub_unwind.stub_type == IMPORT) | |
3517 | return 1; | |
3518 | ||
3519 | /* Parameter relocation stubs always have a call path and may have a | |
3520 | return path. */ | |
3521 | if (u->stub_unwind.stub_type == PARAMETER_RELOCATION | |
3522 | || u->stub_unwind.stub_type == EXPORT) | |
3523 | { | |
3524 | CORE_ADDR addr; | |
3525 | ||
3526 | /* Search forward from the current PC until we hit a branch | |
c5aa993b | 3527 | or the end of the stub. */ |
c906108c SS |
3528 | for (addr = pc; addr <= u->region_end; addr += 4) |
3529 | { | |
3530 | unsigned long insn; | |
3531 | ||
3532 | insn = read_memory_integer (addr, 4); | |
3533 | ||
3534 | /* Does it look like a bl? If so then it's the call path, if | |
3535 | we find a bv or be first, then we're on the return path. */ | |
3536 | if ((insn & 0xfc00e000) == 0xe8000000) | |
3537 | return 1; | |
3538 | else if ((insn & 0xfc00e001) == 0xe800c000 | |
3539 | || (insn & 0xfc000000) == 0xe0000000) | |
3540 | return 0; | |
3541 | } | |
3542 | ||
3543 | /* Should never happen. */ | |
104c1213 JM |
3544 | warning ("Unable to find branch in parameter relocation stub.\n"); |
3545 | return 0; | |
c906108c SS |
3546 | } |
3547 | ||
3548 | /* Unknown stub type. For now, just return zero. */ | |
104c1213 | 3549 | return 0; |
c906108c SS |
3550 | } |
3551 | ||
3552 | /* Return one if PC is in the return path of a trampoline, else return zero. | |
3553 | ||
3554 | Note we return one for *any* call trampoline (long-call, arg-reloc), not | |
3555 | just shared library trampolines (import, export). */ | |
3556 | ||
3557 | int | |
60383d10 | 3558 | hppa_in_solib_return_trampoline (CORE_ADDR pc, char *name) |
c906108c SS |
3559 | { |
3560 | struct unwind_table_entry *u; | |
3561 | ||
3562 | /* Get the unwind descriptor corresponding to PC, return zero | |
3563 | if no unwind was found. */ | |
3564 | u = find_unwind_entry (pc); | |
3565 | if (!u) | |
3566 | return 0; | |
3567 | ||
3568 | /* If this isn't a linker stub or it's just a long branch stub, then | |
3569 | return zero. */ | |
3570 | if (u->stub_unwind.stub_type == 0 || u->stub_unwind.stub_type == LONG_BRANCH) | |
3571 | return 0; | |
3572 | ||
3573 | /* The call and return path execute the same instructions within | |
3574 | an IMPORT stub! So an IMPORT stub is both a call and return | |
3575 | trampoline. */ | |
3576 | if (u->stub_unwind.stub_type == IMPORT) | |
3577 | return 1; | |
3578 | ||
3579 | /* Parameter relocation stubs always have a call path and may have a | |
3580 | return path. */ | |
3581 | if (u->stub_unwind.stub_type == PARAMETER_RELOCATION | |
3582 | || u->stub_unwind.stub_type == EXPORT) | |
3583 | { | |
3584 | CORE_ADDR addr; | |
3585 | ||
3586 | /* Search forward from the current PC until we hit a branch | |
c5aa993b | 3587 | or the end of the stub. */ |
c906108c SS |
3588 | for (addr = pc; addr <= u->region_end; addr += 4) |
3589 | { | |
3590 | unsigned long insn; | |
3591 | ||
3592 | insn = read_memory_integer (addr, 4); | |
3593 | ||
3594 | /* Does it look like a bl? If so then it's the call path, if | |
3595 | we find a bv or be first, then we're on the return path. */ | |
3596 | if ((insn & 0xfc00e000) == 0xe8000000) | |
3597 | return 0; | |
3598 | else if ((insn & 0xfc00e001) == 0xe800c000 | |
3599 | || (insn & 0xfc000000) == 0xe0000000) | |
3600 | return 1; | |
3601 | } | |
3602 | ||
3603 | /* Should never happen. */ | |
104c1213 JM |
3604 | warning ("Unable to find branch in parameter relocation stub.\n"); |
3605 | return 0; | |
c906108c SS |
3606 | } |
3607 | ||
3608 | /* Unknown stub type. For now, just return zero. */ | |
104c1213 | 3609 | return 0; |
c906108c SS |
3610 | |
3611 | } | |
3612 | ||
3613 | /* Figure out if PC is in a trampoline, and if so find out where | |
3614 | the trampoline will jump to. If not in a trampoline, return zero. | |
3615 | ||
3616 | Simple code examination probably is not a good idea since the code | |
3617 | sequences in trampolines can also appear in user code. | |
3618 | ||
3619 | We use unwinds and information from the minimal symbol table to | |
3620 | determine when we're in a trampoline. This won't work for ELF | |
3621 | (yet) since it doesn't create stub unwind entries. Whether or | |
3622 | not ELF will create stub unwinds or normal unwinds for linker | |
3623 | stubs is still being debated. | |
3624 | ||
3625 | This should handle simple calls through dyncall or sr4export, | |
3626 | long calls, argument relocation stubs, and dyncall/sr4export | |
3627 | calling an argument relocation stub. It even handles some stubs | |
3628 | used in dynamic executables. */ | |
3629 | ||
c906108c | 3630 | CORE_ADDR |
60383d10 | 3631 | hppa_skip_trampoline_code (CORE_ADDR pc) |
c906108c SS |
3632 | { |
3633 | long orig_pc = pc; | |
3634 | long prev_inst, curr_inst, loc; | |
3635 | static CORE_ADDR dyncall = 0; | |
3636 | static CORE_ADDR dyncall_external = 0; | |
3637 | static CORE_ADDR sr4export = 0; | |
3638 | struct minimal_symbol *msym; | |
3639 | struct unwind_table_entry *u; | |
3640 | ||
c2c6d25f JM |
3641 | /* FIXME XXX - dyncall and sr4export must be initialized whenever we get a |
3642 | new exec file */ | |
c906108c SS |
3643 | |
3644 | if (!dyncall) | |
3645 | { | |
3646 | msym = lookup_minimal_symbol ("$$dyncall", NULL, NULL); | |
3647 | if (msym) | |
3648 | dyncall = SYMBOL_VALUE_ADDRESS (msym); | |
3649 | else | |
3650 | dyncall = -1; | |
3651 | } | |
3652 | ||
3653 | if (!dyncall_external) | |
3654 | { | |
3655 | msym = lookup_minimal_symbol ("$$dyncall_external", NULL, NULL); | |
3656 | if (msym) | |
3657 | dyncall_external = SYMBOL_VALUE_ADDRESS (msym); | |
3658 | else | |
3659 | dyncall_external = -1; | |
3660 | } | |
3661 | ||
3662 | if (!sr4export) | |
3663 | { | |
3664 | msym = lookup_minimal_symbol ("_sr4export", NULL, NULL); | |
3665 | if (msym) | |
3666 | sr4export = SYMBOL_VALUE_ADDRESS (msym); | |
3667 | else | |
3668 | sr4export = -1; | |
3669 | } | |
3670 | ||
3671 | /* Addresses passed to dyncall may *NOT* be the actual address | |
3672 | of the function. So we may have to do something special. */ | |
3673 | if (pc == dyncall) | |
3674 | { | |
3675 | pc = (CORE_ADDR) read_register (22); | |
3676 | ||
3677 | /* If bit 30 (counting from the left) is on, then pc is the address of | |
c5aa993b JM |
3678 | the PLT entry for this function, not the address of the function |
3679 | itself. Bit 31 has meaning too, but only for MPE. */ | |
c906108c | 3680 | if (pc & 0x2) |
53a5351d | 3681 | pc = (CORE_ADDR) read_memory_integer (pc & ~0x3, TARGET_PTR_BIT / 8); |
c906108c SS |
3682 | } |
3683 | if (pc == dyncall_external) | |
3684 | { | |
3685 | pc = (CORE_ADDR) read_register (22); | |
53a5351d | 3686 | pc = (CORE_ADDR) read_memory_integer (pc & ~0x3, TARGET_PTR_BIT / 8); |
c906108c SS |
3687 | } |
3688 | else if (pc == sr4export) | |
3689 | pc = (CORE_ADDR) (read_register (22)); | |
3690 | ||
3691 | /* Get the unwind descriptor corresponding to PC, return zero | |
3692 | if no unwind was found. */ | |
3693 | u = find_unwind_entry (pc); | |
3694 | if (!u) | |
3695 | return 0; | |
3696 | ||
3697 | /* If this isn't a linker stub, then return now. */ | |
3698 | /* elz: attention here! (FIXME) because of a compiler/linker | |
3699 | error, some stubs which should have a non zero stub_unwind.stub_type | |
3700 | have unfortunately a value of zero. So this function would return here | |
3701 | as if we were not in a trampoline. To fix this, we go look at the partial | |
3702 | symbol information, which reports this guy as a stub. | |
3703 | (FIXME): Unfortunately, we are not that lucky: it turns out that the | |
3704 | partial symbol information is also wrong sometimes. This is because | |
3705 | when it is entered (somread.c::som_symtab_read()) it can happen that | |
3706 | if the type of the symbol (from the som) is Entry, and the symbol is | |
3707 | in a shared library, then it can also be a trampoline. This would | |
3708 | be OK, except that I believe the way they decide if we are ina shared library | |
3709 | does not work. SOOOO..., even if we have a regular function w/o trampolines | |
3710 | its minimal symbol can be assigned type mst_solib_trampoline. | |
3711 | Also, if we find that the symbol is a real stub, then we fix the unwind | |
3712 | descriptor, and define the stub type to be EXPORT. | |
c5aa993b | 3713 | Hopefully this is correct most of the times. */ |
c906108c | 3714 | if (u->stub_unwind.stub_type == 0) |
c5aa993b | 3715 | { |
c906108c SS |
3716 | |
3717 | /* elz: NOTE (FIXME!) once the problem with the unwind information is fixed | |
3718 | we can delete all the code which appears between the lines */ | |
3719 | /*--------------------------------------------------------------------------*/ | |
c5aa993b | 3720 | msym = lookup_minimal_symbol_by_pc (pc); |
c906108c | 3721 | |
c5aa993b JM |
3722 | if (msym == NULL || MSYMBOL_TYPE (msym) != mst_solib_trampoline) |
3723 | return orig_pc == pc ? 0 : pc & ~0x3; | |
3724 | ||
3725 | else if (msym != NULL && MSYMBOL_TYPE (msym) == mst_solib_trampoline) | |
3726 | { | |
3727 | struct objfile *objfile; | |
3728 | struct minimal_symbol *msymbol; | |
3729 | int function_found = 0; | |
3730 | ||
3731 | /* go look if there is another minimal symbol with the same name as | |
3732 | this one, but with type mst_text. This would happen if the msym | |
3733 | is an actual trampoline, in which case there would be another | |
3734 | symbol with the same name corresponding to the real function */ | |
3735 | ||
3736 | ALL_MSYMBOLS (objfile, msymbol) | |
3737 | { | |
3738 | if (MSYMBOL_TYPE (msymbol) == mst_text | |
cb137aa5 | 3739 | && DEPRECATED_STREQ (DEPRECATED_SYMBOL_NAME (msymbol), DEPRECATED_SYMBOL_NAME (msym))) |
c5aa993b JM |
3740 | { |
3741 | function_found = 1; | |
3742 | break; | |
3743 | } | |
3744 | } | |
3745 | ||
3746 | if (function_found) | |
3747 | /* the type of msym is correct (mst_solib_trampoline), but | |
3748 | the unwind info is wrong, so set it to the correct value */ | |
3749 | u->stub_unwind.stub_type = EXPORT; | |
3750 | else | |
3751 | /* the stub type info in the unwind is correct (this is not a | |
3752 | trampoline), but the msym type information is wrong, it | |
3753 | should be mst_text. So we need to fix the msym, and also | |
3754 | get out of this function */ | |
3755 | { | |
3756 | MSYMBOL_TYPE (msym) = mst_text; | |
3757 | return orig_pc == pc ? 0 : pc & ~0x3; | |
3758 | } | |
3759 | } | |
c906108c | 3760 | |
c906108c | 3761 | /*--------------------------------------------------------------------------*/ |
c5aa993b | 3762 | } |
c906108c SS |
3763 | |
3764 | /* It's a stub. Search for a branch and figure out where it goes. | |
3765 | Note we have to handle multi insn branch sequences like ldil;ble. | |
3766 | Most (all?) other branches can be determined by examining the contents | |
3767 | of certain registers and the stack. */ | |
3768 | ||
3769 | loc = pc; | |
3770 | curr_inst = 0; | |
3771 | prev_inst = 0; | |
3772 | while (1) | |
3773 | { | |
3774 | /* Make sure we haven't walked outside the range of this stub. */ | |
3775 | if (u != find_unwind_entry (loc)) | |
3776 | { | |
3777 | warning ("Unable to find branch in linker stub"); | |
3778 | return orig_pc == pc ? 0 : pc & ~0x3; | |
3779 | } | |
3780 | ||
3781 | prev_inst = curr_inst; | |
3782 | curr_inst = read_memory_integer (loc, 4); | |
3783 | ||
3784 | /* Does it look like a branch external using %r1? Then it's the | |
c5aa993b | 3785 | branch from the stub to the actual function. */ |
c906108c SS |
3786 | if ((curr_inst & 0xffe0e000) == 0xe0202000) |
3787 | { | |
3788 | /* Yup. See if the previous instruction loaded | |
3789 | a value into %r1. If so compute and return the jump address. */ | |
3790 | if ((prev_inst & 0xffe00000) == 0x20200000) | |
3791 | return (extract_21 (prev_inst) + extract_17 (curr_inst)) & ~0x3; | |
3792 | else | |
3793 | { | |
3794 | warning ("Unable to find ldil X,%%r1 before ble Y(%%sr4,%%r1)."); | |
3795 | return orig_pc == pc ? 0 : pc & ~0x3; | |
3796 | } | |
3797 | } | |
3798 | ||
3799 | /* Does it look like a be 0(sr0,%r21)? OR | |
3800 | Does it look like a be, n 0(sr0,%r21)? OR | |
3801 | Does it look like a bve (r21)? (this is on PA2.0) | |
3802 | Does it look like a bve, n(r21)? (this is also on PA2.0) | |
3803 | That's the branch from an | |
c5aa993b | 3804 | import stub to an export stub. |
c906108c | 3805 | |
c5aa993b JM |
3806 | It is impossible to determine the target of the branch via |
3807 | simple examination of instructions and/or data (consider | |
3808 | that the address in the plabel may be the address of the | |
3809 | bind-on-reference routine in the dynamic loader). | |
c906108c | 3810 | |
c5aa993b | 3811 | So we have try an alternative approach. |
c906108c | 3812 | |
c5aa993b JM |
3813 | Get the name of the symbol at our current location; it should |
3814 | be a stub symbol with the same name as the symbol in the | |
3815 | shared library. | |
c906108c | 3816 | |
c5aa993b JM |
3817 | Then lookup a minimal symbol with the same name; we should |
3818 | get the minimal symbol for the target routine in the shared | |
3819 | library as those take precedence of import/export stubs. */ | |
c906108c | 3820 | if ((curr_inst == 0xe2a00000) || |
c5aa993b JM |
3821 | (curr_inst == 0xe2a00002) || |
3822 | (curr_inst == 0xeaa0d000) || | |
3823 | (curr_inst == 0xeaa0d002)) | |
c906108c SS |
3824 | { |
3825 | struct minimal_symbol *stubsym, *libsym; | |
3826 | ||
3827 | stubsym = lookup_minimal_symbol_by_pc (loc); | |
3828 | if (stubsym == NULL) | |
3829 | { | |
ce414844 | 3830 | warning ("Unable to find symbol for 0x%lx", loc); |
c906108c SS |
3831 | return orig_pc == pc ? 0 : pc & ~0x3; |
3832 | } | |
3833 | ||
22abf04a | 3834 | libsym = lookup_minimal_symbol (DEPRECATED_SYMBOL_NAME (stubsym), NULL, NULL); |
c906108c SS |
3835 | if (libsym == NULL) |
3836 | { | |
3837 | warning ("Unable to find library symbol for %s\n", | |
22abf04a | 3838 | DEPRECATED_SYMBOL_NAME (stubsym)); |
c906108c SS |
3839 | return orig_pc == pc ? 0 : pc & ~0x3; |
3840 | } | |
3841 | ||
3842 | return SYMBOL_VALUE (libsym); | |
3843 | } | |
3844 | ||
3845 | /* Does it look like bl X,%rp or bl X,%r0? Another way to do a | |
c5aa993b JM |
3846 | branch from the stub to the actual function. */ |
3847 | /*elz */ | |
c906108c SS |
3848 | else if ((curr_inst & 0xffe0e000) == 0xe8400000 |
3849 | || (curr_inst & 0xffe0e000) == 0xe8000000 | |
c5aa993b | 3850 | || (curr_inst & 0xffe0e000) == 0xe800A000) |
c906108c SS |
3851 | return (loc + extract_17 (curr_inst) + 8) & ~0x3; |
3852 | ||
3853 | /* Does it look like bv (rp)? Note this depends on the | |
c5aa993b JM |
3854 | current stack pointer being the same as the stack |
3855 | pointer in the stub itself! This is a branch on from the | |
3856 | stub back to the original caller. */ | |
3857 | /*else if ((curr_inst & 0xffe0e000) == 0xe840c000) */ | |
c906108c SS |
3858 | else if ((curr_inst & 0xffe0f000) == 0xe840c000) |
3859 | { | |
3860 | /* Yup. See if the previous instruction loaded | |
3861 | rp from sp - 8. */ | |
3862 | if (prev_inst == 0x4bc23ff1) | |
3863 | return (read_memory_integer | |
3864 | (read_register (SP_REGNUM) - 8, 4)) & ~0x3; | |
3865 | else | |
3866 | { | |
3867 | warning ("Unable to find restore of %%rp before bv (%%rp)."); | |
3868 | return orig_pc == pc ? 0 : pc & ~0x3; | |
3869 | } | |
3870 | } | |
3871 | ||
3872 | /* elz: added this case to capture the new instruction | |
3873 | at the end of the return part of an export stub used by | |
3874 | the PA2.0: BVE, n (rp) */ | |
3875 | else if ((curr_inst & 0xffe0f000) == 0xe840d000) | |
3876 | { | |
c5aa993b | 3877 | return (read_memory_integer |
53a5351d | 3878 | (read_register (SP_REGNUM) - 24, TARGET_PTR_BIT / 8)) & ~0x3; |
c906108c SS |
3879 | } |
3880 | ||
3881 | /* What about be,n 0(sr0,%rp)? It's just another way we return to | |
c5aa993b | 3882 | the original caller from the stub. Used in dynamic executables. */ |
c906108c SS |
3883 | else if (curr_inst == 0xe0400002) |
3884 | { | |
3885 | /* The value we jump to is sitting in sp - 24. But that's | |
3886 | loaded several instructions before the be instruction. | |
3887 | I guess we could check for the previous instruction being | |
3888 | mtsp %r1,%sr0 if we want to do sanity checking. */ | |
c5aa993b | 3889 | return (read_memory_integer |
53a5351d | 3890 | (read_register (SP_REGNUM) - 24, TARGET_PTR_BIT / 8)) & ~0x3; |
c906108c SS |
3891 | } |
3892 | ||
3893 | /* Haven't found the branch yet, but we're still in the stub. | |
c5aa993b | 3894 | Keep looking. */ |
c906108c SS |
3895 | loc += 4; |
3896 | } | |
3897 | } | |
3898 | ||
3899 | ||
3900 | /* For the given instruction (INST), return any adjustment it makes | |
3901 | to the stack pointer or zero for no adjustment. | |
3902 | ||
3903 | This only handles instructions commonly found in prologues. */ | |
3904 | ||
3905 | static int | |
fba45db2 | 3906 | prologue_inst_adjust_sp (unsigned long inst) |
c906108c SS |
3907 | { |
3908 | /* This must persist across calls. */ | |
3909 | static int save_high21; | |
3910 | ||
3911 | /* The most common way to perform a stack adjustment ldo X(sp),sp */ | |
3912 | if ((inst & 0xffffc000) == 0x37de0000) | |
3913 | return extract_14 (inst); | |
3914 | ||
3915 | /* stwm X,D(sp) */ | |
3916 | if ((inst & 0xffe00000) == 0x6fc00000) | |
3917 | return extract_14 (inst); | |
3918 | ||
104c1213 JM |
3919 | /* std,ma X,D(sp) */ |
3920 | if ((inst & 0xffe00008) == 0x73c00008) | |
d4f3574e | 3921 | return (inst & 0x1 ? -1 << 13 : 0) | (((inst >> 4) & 0x3ff) << 3); |
104c1213 | 3922 | |
c906108c SS |
3923 | /* addil high21,%r1; ldo low11,(%r1),%r30) |
3924 | save high bits in save_high21 for later use. */ | |
3925 | if ((inst & 0xffe00000) == 0x28200000) | |
3926 | { | |
3927 | save_high21 = extract_21 (inst); | |
3928 | return 0; | |
3929 | } | |
3930 | ||
3931 | if ((inst & 0xffff0000) == 0x343e0000) | |
3932 | return save_high21 + extract_14 (inst); | |
3933 | ||
3934 | /* fstws as used by the HP compilers. */ | |
3935 | if ((inst & 0xffffffe0) == 0x2fd01220) | |
3936 | return extract_5_load (inst); | |
3937 | ||
3938 | /* No adjustment. */ | |
3939 | return 0; | |
3940 | } | |
3941 | ||
3942 | /* Return nonzero if INST is a branch of some kind, else return zero. */ | |
3943 | ||
3944 | static int | |
fba45db2 | 3945 | is_branch (unsigned long inst) |
c906108c SS |
3946 | { |
3947 | switch (inst >> 26) | |
3948 | { | |
3949 | case 0x20: | |
3950 | case 0x21: | |
3951 | case 0x22: | |
3952 | case 0x23: | |
7be570e7 | 3953 | case 0x27: |
c906108c SS |
3954 | case 0x28: |
3955 | case 0x29: | |
3956 | case 0x2a: | |
3957 | case 0x2b: | |
7be570e7 | 3958 | case 0x2f: |
c906108c SS |
3959 | case 0x30: |
3960 | case 0x31: | |
3961 | case 0x32: | |
3962 | case 0x33: | |
3963 | case 0x38: | |
3964 | case 0x39: | |
3965 | case 0x3a: | |
7be570e7 | 3966 | case 0x3b: |
c906108c SS |
3967 | return 1; |
3968 | ||
3969 | default: | |
3970 | return 0; | |
3971 | } | |
3972 | } | |
3973 | ||
3974 | /* Return the register number for a GR which is saved by INST or | |
3975 | zero it INST does not save a GR. */ | |
3976 | ||
3977 | static int | |
fba45db2 | 3978 | inst_saves_gr (unsigned long inst) |
c906108c SS |
3979 | { |
3980 | /* Does it look like a stw? */ | |
7be570e7 JM |
3981 | if ((inst >> 26) == 0x1a || (inst >> 26) == 0x1b |
3982 | || (inst >> 26) == 0x1f | |
3983 | || ((inst >> 26) == 0x1f | |
3984 | && ((inst >> 6) == 0xa))) | |
3985 | return extract_5R_store (inst); | |
3986 | ||
3987 | /* Does it look like a std? */ | |
3988 | if ((inst >> 26) == 0x1c | |
3989 | || ((inst >> 26) == 0x03 | |
3990 | && ((inst >> 6) & 0xf) == 0xb)) | |
c906108c SS |
3991 | return extract_5R_store (inst); |
3992 | ||
3993 | /* Does it look like a stwm? GCC & HPC may use this in prologues. */ | |
3994 | if ((inst >> 26) == 0x1b) | |
3995 | return extract_5R_store (inst); | |
3996 | ||
3997 | /* Does it look like sth or stb? HPC versions 9.0 and later use these | |
3998 | too. */ | |
7be570e7 JM |
3999 | if ((inst >> 26) == 0x19 || (inst >> 26) == 0x18 |
4000 | || ((inst >> 26) == 0x3 | |
4001 | && (((inst >> 6) & 0xf) == 0x8 | |
4002 | || (inst >> 6) & 0xf) == 0x9)) | |
c906108c | 4003 | return extract_5R_store (inst); |
c5aa993b | 4004 | |
c906108c SS |
4005 | return 0; |
4006 | } | |
4007 | ||
4008 | /* Return the register number for a FR which is saved by INST or | |
4009 | zero it INST does not save a FR. | |
4010 | ||
4011 | Note we only care about full 64bit register stores (that's the only | |
4012 | kind of stores the prologue will use). | |
4013 | ||
4014 | FIXME: What about argument stores with the HP compiler in ANSI mode? */ | |
4015 | ||
4016 | static int | |
fba45db2 | 4017 | inst_saves_fr (unsigned long inst) |
c906108c | 4018 | { |
7be570e7 | 4019 | /* is this an FSTD ? */ |
c906108c SS |
4020 | if ((inst & 0xfc00dfc0) == 0x2c001200) |
4021 | return extract_5r_store (inst); | |
7be570e7 JM |
4022 | if ((inst & 0xfc000002) == 0x70000002) |
4023 | return extract_5R_store (inst); | |
4024 | /* is this an FSTW ? */ | |
c906108c SS |
4025 | if ((inst & 0xfc00df80) == 0x24001200) |
4026 | return extract_5r_store (inst); | |
7be570e7 JM |
4027 | if ((inst & 0xfc000002) == 0x7c000000) |
4028 | return extract_5R_store (inst); | |
c906108c SS |
4029 | return 0; |
4030 | } | |
4031 | ||
4032 | /* Advance PC across any function entry prologue instructions | |
4033 | to reach some "real" code. | |
4034 | ||
4035 | Use information in the unwind table to determine what exactly should | |
4036 | be in the prologue. */ | |
4037 | ||
4038 | ||
4039 | CORE_ADDR | |
fba45db2 | 4040 | skip_prologue_hard_way (CORE_ADDR pc) |
c906108c SS |
4041 | { |
4042 | char buf[4]; | |
4043 | CORE_ADDR orig_pc = pc; | |
4044 | unsigned long inst, stack_remaining, save_gr, save_fr, save_rp, save_sp; | |
4045 | unsigned long args_stored, status, i, restart_gr, restart_fr; | |
4046 | struct unwind_table_entry *u; | |
4047 | ||
4048 | restart_gr = 0; | |
4049 | restart_fr = 0; | |
4050 | ||
4051 | restart: | |
4052 | u = find_unwind_entry (pc); | |
4053 | if (!u) | |
4054 | return pc; | |
4055 | ||
c5aa993b | 4056 | /* If we are not at the beginning of a function, then return now. */ |
c906108c SS |
4057 | if ((pc & ~0x3) != u->region_start) |
4058 | return pc; | |
4059 | ||
4060 | /* This is how much of a frame adjustment we need to account for. */ | |
4061 | stack_remaining = u->Total_frame_size << 3; | |
4062 | ||
4063 | /* Magic register saves we want to know about. */ | |
4064 | save_rp = u->Save_RP; | |
4065 | save_sp = u->Save_SP; | |
4066 | ||
4067 | /* An indication that args may be stored into the stack. Unfortunately | |
4068 | the HPUX compilers tend to set this in cases where no args were | |
4069 | stored too!. */ | |
4070 | args_stored = 1; | |
4071 | ||
4072 | /* Turn the Entry_GR field into a bitmask. */ | |
4073 | save_gr = 0; | |
4074 | for (i = 3; i < u->Entry_GR + 3; i++) | |
4075 | { | |
4076 | /* Frame pointer gets saved into a special location. */ | |
0ba6dca9 | 4077 | if (u->Save_SP && i == DEPRECATED_FP_REGNUM) |
c906108c SS |
4078 | continue; |
4079 | ||
4080 | save_gr |= (1 << i); | |
4081 | } | |
4082 | save_gr &= ~restart_gr; | |
4083 | ||
4084 | /* Turn the Entry_FR field into a bitmask too. */ | |
4085 | save_fr = 0; | |
4086 | for (i = 12; i < u->Entry_FR + 12; i++) | |
4087 | save_fr |= (1 << i); | |
4088 | save_fr &= ~restart_fr; | |
4089 | ||
4090 | /* Loop until we find everything of interest or hit a branch. | |
4091 | ||
4092 | For unoptimized GCC code and for any HP CC code this will never ever | |
4093 | examine any user instructions. | |
4094 | ||
4095 | For optimzied GCC code we're faced with problems. GCC will schedule | |
4096 | its prologue and make prologue instructions available for delay slot | |
4097 | filling. The end result is user code gets mixed in with the prologue | |
4098 | and a prologue instruction may be in the delay slot of the first branch | |
4099 | or call. | |
4100 | ||
4101 | Some unexpected things are expected with debugging optimized code, so | |
4102 | we allow this routine to walk past user instructions in optimized | |
4103 | GCC code. */ | |
4104 | while (save_gr || save_fr || save_rp || save_sp || stack_remaining > 0 | |
4105 | || args_stored) | |
4106 | { | |
4107 | unsigned int reg_num; | |
4108 | unsigned long old_stack_remaining, old_save_gr, old_save_fr; | |
4109 | unsigned long old_save_rp, old_save_sp, next_inst; | |
4110 | ||
4111 | /* Save copies of all the triggers so we can compare them later | |
c5aa993b | 4112 | (only for HPC). */ |
c906108c SS |
4113 | old_save_gr = save_gr; |
4114 | old_save_fr = save_fr; | |
4115 | old_save_rp = save_rp; | |
4116 | old_save_sp = save_sp; | |
4117 | old_stack_remaining = stack_remaining; | |
4118 | ||
4119 | status = target_read_memory (pc, buf, 4); | |
4120 | inst = extract_unsigned_integer (buf, 4); | |
c5aa993b | 4121 | |
c906108c SS |
4122 | /* Yow! */ |
4123 | if (status != 0) | |
4124 | return pc; | |
4125 | ||
4126 | /* Note the interesting effects of this instruction. */ | |
4127 | stack_remaining -= prologue_inst_adjust_sp (inst); | |
4128 | ||
7be570e7 JM |
4129 | /* There are limited ways to store the return pointer into the |
4130 | stack. */ | |
4131 | if (inst == 0x6bc23fd9 || inst == 0x0fc212c1) | |
c906108c SS |
4132 | save_rp = 0; |
4133 | ||
104c1213 | 4134 | /* These are the only ways we save SP into the stack. At this time |
c5aa993b | 4135 | the HP compilers never bother to save SP into the stack. */ |
104c1213 JM |
4136 | if ((inst & 0xffffc000) == 0x6fc10000 |
4137 | || (inst & 0xffffc00c) == 0x73c10008) | |
c906108c SS |
4138 | save_sp = 0; |
4139 | ||
6426a772 JM |
4140 | /* Are we loading some register with an offset from the argument |
4141 | pointer? */ | |
4142 | if ((inst & 0xffe00000) == 0x37a00000 | |
4143 | || (inst & 0xffffffe0) == 0x081d0240) | |
4144 | { | |
4145 | pc += 4; | |
4146 | continue; | |
4147 | } | |
4148 | ||
c906108c SS |
4149 | /* Account for general and floating-point register saves. */ |
4150 | reg_num = inst_saves_gr (inst); | |
4151 | save_gr &= ~(1 << reg_num); | |
4152 | ||
4153 | /* Ugh. Also account for argument stores into the stack. | |
c5aa993b JM |
4154 | Unfortunately args_stored only tells us that some arguments |
4155 | where stored into the stack. Not how many or what kind! | |
c906108c | 4156 | |
c5aa993b JM |
4157 | This is a kludge as on the HP compiler sets this bit and it |
4158 | never does prologue scheduling. So once we see one, skip past | |
4159 | all of them. We have similar code for the fp arg stores below. | |
c906108c | 4160 | |
c5aa993b JM |
4161 | FIXME. Can still die if we have a mix of GR and FR argument |
4162 | stores! */ | |
6426a772 | 4163 | if (reg_num >= (TARGET_PTR_BIT == 64 ? 19 : 23) && reg_num <= 26) |
c906108c | 4164 | { |
6426a772 | 4165 | while (reg_num >= (TARGET_PTR_BIT == 64 ? 19 : 23) && reg_num <= 26) |
c906108c SS |
4166 | { |
4167 | pc += 4; | |
4168 | status = target_read_memory (pc, buf, 4); | |
4169 | inst = extract_unsigned_integer (buf, 4); | |
4170 | if (status != 0) | |
4171 | return pc; | |
4172 | reg_num = inst_saves_gr (inst); | |
4173 | } | |
4174 | args_stored = 0; | |
4175 | continue; | |
4176 | } | |
4177 | ||
4178 | reg_num = inst_saves_fr (inst); | |
4179 | save_fr &= ~(1 << reg_num); | |
4180 | ||
4181 | status = target_read_memory (pc + 4, buf, 4); | |
4182 | next_inst = extract_unsigned_integer (buf, 4); | |
c5aa993b | 4183 | |
c906108c SS |
4184 | /* Yow! */ |
4185 | if (status != 0) | |
4186 | return pc; | |
4187 | ||
4188 | /* We've got to be read to handle the ldo before the fp register | |
c5aa993b | 4189 | save. */ |
c906108c SS |
4190 | if ((inst & 0xfc000000) == 0x34000000 |
4191 | && inst_saves_fr (next_inst) >= 4 | |
6426a772 | 4192 | && inst_saves_fr (next_inst) <= (TARGET_PTR_BIT == 64 ? 11 : 7)) |
c906108c SS |
4193 | { |
4194 | /* So we drop into the code below in a reasonable state. */ | |
4195 | reg_num = inst_saves_fr (next_inst); | |
4196 | pc -= 4; | |
4197 | } | |
4198 | ||
4199 | /* Ugh. Also account for argument stores into the stack. | |
c5aa993b JM |
4200 | This is a kludge as on the HP compiler sets this bit and it |
4201 | never does prologue scheduling. So once we see one, skip past | |
4202 | all of them. */ | |
6426a772 | 4203 | if (reg_num >= 4 && reg_num <= (TARGET_PTR_BIT == 64 ? 11 : 7)) |
c906108c | 4204 | { |
6426a772 | 4205 | while (reg_num >= 4 && reg_num <= (TARGET_PTR_BIT == 64 ? 11 : 7)) |
c906108c SS |
4206 | { |
4207 | pc += 8; | |
4208 | status = target_read_memory (pc, buf, 4); | |
4209 | inst = extract_unsigned_integer (buf, 4); | |
4210 | if (status != 0) | |
4211 | return pc; | |
4212 | if ((inst & 0xfc000000) != 0x34000000) | |
4213 | break; | |
4214 | status = target_read_memory (pc + 4, buf, 4); | |
4215 | next_inst = extract_unsigned_integer (buf, 4); | |
4216 | if (status != 0) | |
4217 | return pc; | |
4218 | reg_num = inst_saves_fr (next_inst); | |
4219 | } | |
4220 | args_stored = 0; | |
4221 | continue; | |
4222 | } | |
4223 | ||
4224 | /* Quit if we hit any kind of branch. This can happen if a prologue | |
c5aa993b | 4225 | instruction is in the delay slot of the first call/branch. */ |
c906108c SS |
4226 | if (is_branch (inst)) |
4227 | break; | |
4228 | ||
4229 | /* What a crock. The HP compilers set args_stored even if no | |
c5aa993b JM |
4230 | arguments were stored into the stack (boo hiss). This could |
4231 | cause this code to then skip a bunch of user insns (up to the | |
4232 | first branch). | |
4233 | ||
4234 | To combat this we try to identify when args_stored was bogusly | |
4235 | set and clear it. We only do this when args_stored is nonzero, | |
4236 | all other resources are accounted for, and nothing changed on | |
4237 | this pass. */ | |
c906108c | 4238 | if (args_stored |
c5aa993b | 4239 | && !(save_gr || save_fr || save_rp || save_sp || stack_remaining > 0) |
c906108c SS |
4240 | && old_save_gr == save_gr && old_save_fr == save_fr |
4241 | && old_save_rp == save_rp && old_save_sp == save_sp | |
4242 | && old_stack_remaining == stack_remaining) | |
4243 | break; | |
c5aa993b | 4244 | |
c906108c SS |
4245 | /* Bump the PC. */ |
4246 | pc += 4; | |
4247 | } | |
4248 | ||
4249 | /* We've got a tenative location for the end of the prologue. However | |
4250 | because of limitations in the unwind descriptor mechanism we may | |
4251 | have went too far into user code looking for the save of a register | |
4252 | that does not exist. So, if there registers we expected to be saved | |
4253 | but never were, mask them out and restart. | |
4254 | ||
4255 | This should only happen in optimized code, and should be very rare. */ | |
c5aa993b | 4256 | if (save_gr || (save_fr && !(restart_fr || restart_gr))) |
c906108c SS |
4257 | { |
4258 | pc = orig_pc; | |
4259 | restart_gr = save_gr; | |
4260 | restart_fr = save_fr; | |
4261 | goto restart; | |
4262 | } | |
4263 | ||
4264 | return pc; | |
4265 | } | |
4266 | ||
4267 | ||
7be570e7 JM |
4268 | /* Return the address of the PC after the last prologue instruction if |
4269 | we can determine it from the debug symbols. Else return zero. */ | |
c906108c SS |
4270 | |
4271 | static CORE_ADDR | |
fba45db2 | 4272 | after_prologue (CORE_ADDR pc) |
c906108c SS |
4273 | { |
4274 | struct symtab_and_line sal; | |
4275 | CORE_ADDR func_addr, func_end; | |
4276 | struct symbol *f; | |
4277 | ||
7be570e7 JM |
4278 | /* If we can not find the symbol in the partial symbol table, then |
4279 | there is no hope we can determine the function's start address | |
4280 | with this code. */ | |
c906108c | 4281 | if (!find_pc_partial_function (pc, NULL, &func_addr, &func_end)) |
7be570e7 | 4282 | return 0; |
c906108c | 4283 | |
7be570e7 | 4284 | /* Get the line associated with FUNC_ADDR. */ |
c906108c SS |
4285 | sal = find_pc_line (func_addr, 0); |
4286 | ||
7be570e7 JM |
4287 | /* There are only two cases to consider. First, the end of the source line |
4288 | is within the function bounds. In that case we return the end of the | |
4289 | source line. Second is the end of the source line extends beyond the | |
4290 | bounds of the current function. We need to use the slow code to | |
4291 | examine instructions in that case. | |
c906108c | 4292 | |
7be570e7 JM |
4293 | Anything else is simply a bug elsewhere. Fixing it here is absolutely |
4294 | the wrong thing to do. In fact, it should be entirely possible for this | |
4295 | function to always return zero since the slow instruction scanning code | |
4296 | is supposed to *always* work. If it does not, then it is a bug. */ | |
4297 | if (sal.end < func_end) | |
4298 | return sal.end; | |
c5aa993b | 4299 | else |
7be570e7 | 4300 | return 0; |
c906108c SS |
4301 | } |
4302 | ||
4303 | /* To skip prologues, I use this predicate. Returns either PC itself | |
4304 | if the code at PC does not look like a function prologue; otherwise | |
4305 | returns an address that (if we're lucky) follows the prologue. If | |
4306 | LENIENT, then we must skip everything which is involved in setting | |
4307 | up the frame (it's OK to skip more, just so long as we don't skip | |
4308 | anything which might clobber the registers which are being saved. | |
4309 | Currently we must not skip more on the alpha, but we might the lenient | |
4310 | stuff some day. */ | |
4311 | ||
4312 | CORE_ADDR | |
fba45db2 | 4313 | hppa_skip_prologue (CORE_ADDR pc) |
c906108c | 4314 | { |
c5aa993b JM |
4315 | unsigned long inst; |
4316 | int offset; | |
4317 | CORE_ADDR post_prologue_pc; | |
4318 | char buf[4]; | |
c906108c | 4319 | |
c5aa993b JM |
4320 | /* See if we can determine the end of the prologue via the symbol table. |
4321 | If so, then return either PC, or the PC after the prologue, whichever | |
4322 | is greater. */ | |
c906108c | 4323 | |
c5aa993b | 4324 | post_prologue_pc = after_prologue (pc); |
c906108c | 4325 | |
7be570e7 JM |
4326 | /* If after_prologue returned a useful address, then use it. Else |
4327 | fall back on the instruction skipping code. | |
4328 | ||
4329 | Some folks have claimed this causes problems because the breakpoint | |
4330 | may be the first instruction of the prologue. If that happens, then | |
4331 | the instruction skipping code has a bug that needs to be fixed. */ | |
c5aa993b JM |
4332 | if (post_prologue_pc != 0) |
4333 | return max (pc, post_prologue_pc); | |
c5aa993b JM |
4334 | else |
4335 | return (skip_prologue_hard_way (pc)); | |
c906108c SS |
4336 | } |
4337 | ||
43bd9a9e AC |
4338 | /* Put here the code to store, into the SAVED_REGS, the addresses of |
4339 | the saved registers of frame described by FRAME_INFO. This | |
4340 | includes special registers such as pc and fp saved in special ways | |
4341 | in the stack frame. sp is even more special: the address we return | |
4342 | for it IS the sp for the next frame. */ | |
c906108c SS |
4343 | |
4344 | void | |
fba45db2 | 4345 | hppa_frame_find_saved_regs (struct frame_info *frame_info, |
43bd9a9e | 4346 | CORE_ADDR frame_saved_regs[]) |
c906108c SS |
4347 | { |
4348 | CORE_ADDR pc; | |
4349 | struct unwind_table_entry *u; | |
4350 | unsigned long inst, stack_remaining, save_gr, save_fr, save_rp, save_sp; | |
4351 | int status, i, reg; | |
4352 | char buf[4]; | |
4353 | int fp_loc = -1; | |
d4f3574e | 4354 | int final_iteration; |
c906108c SS |
4355 | |
4356 | /* Zero out everything. */ | |
43bd9a9e | 4357 | memset (frame_saved_regs, '\0', SIZEOF_FRAME_SAVED_REGS); |
c906108c SS |
4358 | |
4359 | /* Call dummy frames always look the same, so there's no need to | |
4360 | examine the dummy code to determine locations of saved registers; | |
4361 | instead, let find_dummy_frame_regs fill in the correct offsets | |
4362 | for the saved registers. */ | |
ef6e7e13 AC |
4363 | if ((get_frame_pc (frame_info) >= get_frame_base (frame_info) |
4364 | && (get_frame_pc (frame_info) | |
4365 | <= (get_frame_base (frame_info) | |
4366 | /* A call dummy is sized in words, but it is actually a | |
4367 | series of instructions. Account for that scaling | |
4368 | factor. */ | |
b1e29e33 AC |
4369 | + ((DEPRECATED_REGISTER_SIZE / INSTRUCTION_SIZE) |
4370 | * DEPRECATED_CALL_DUMMY_LENGTH) | |
ef6e7e13 AC |
4371 | /* Similarly we have to account for 64bit wide register |
4372 | saves. */ | |
b1e29e33 | 4373 | + (32 * DEPRECATED_REGISTER_SIZE) |
ef6e7e13 AC |
4374 | /* We always consider FP regs 8 bytes long. */ |
4375 | + (NUM_REGS - FP0_REGNUM) * 8 | |
4376 | /* Similarly we have to account for 64bit wide register | |
4377 | saves. */ | |
b1e29e33 | 4378 | + (6 * DEPRECATED_REGISTER_SIZE))))) |
c906108c SS |
4379 | find_dummy_frame_regs (frame_info, frame_saved_regs); |
4380 | ||
4381 | /* Interrupt handlers are special too. They lay out the register | |
4382 | state in the exact same order as the register numbers in GDB. */ | |
ef6e7e13 | 4383 | if (pc_in_interrupt_handler (get_frame_pc (frame_info))) |
c906108c SS |
4384 | { |
4385 | for (i = 0; i < NUM_REGS; i++) | |
4386 | { | |
4387 | /* SP is a little special. */ | |
4388 | if (i == SP_REGNUM) | |
43bd9a9e | 4389 | frame_saved_regs[SP_REGNUM] |
ef6e7e13 | 4390 | = read_memory_integer (get_frame_base (frame_info) + SP_REGNUM * 4, |
53a5351d | 4391 | TARGET_PTR_BIT / 8); |
c906108c | 4392 | else |
ef6e7e13 | 4393 | frame_saved_regs[i] = get_frame_base (frame_info) + i * 4; |
c906108c SS |
4394 | } |
4395 | return; | |
4396 | } | |
4397 | ||
4398 | #ifdef FRAME_FIND_SAVED_REGS_IN_SIGTRAMP | |
4399 | /* Handle signal handler callers. */ | |
5a203e44 | 4400 | if ((get_frame_type (frame_info) == SIGTRAMP_FRAME)) |
c906108c SS |
4401 | { |
4402 | FRAME_FIND_SAVED_REGS_IN_SIGTRAMP (frame_info, frame_saved_regs); | |
4403 | return; | |
4404 | } | |
4405 | #endif | |
4406 | ||
4407 | /* Get the starting address of the function referred to by the PC | |
4408 | saved in frame. */ | |
be41e9f4 | 4409 | pc = get_frame_func (frame_info); |
c906108c SS |
4410 | |
4411 | /* Yow! */ | |
4412 | u = find_unwind_entry (pc); | |
4413 | if (!u) | |
4414 | return; | |
4415 | ||
4416 | /* This is how much of a frame adjustment we need to account for. */ | |
4417 | stack_remaining = u->Total_frame_size << 3; | |
4418 | ||
4419 | /* Magic register saves we want to know about. */ | |
4420 | save_rp = u->Save_RP; | |
4421 | save_sp = u->Save_SP; | |
4422 | ||
4423 | /* Turn the Entry_GR field into a bitmask. */ | |
4424 | save_gr = 0; | |
4425 | for (i = 3; i < u->Entry_GR + 3; i++) | |
4426 | { | |
4427 | /* Frame pointer gets saved into a special location. */ | |
0ba6dca9 | 4428 | if (u->Save_SP && i == DEPRECATED_FP_REGNUM) |
c906108c SS |
4429 | continue; |
4430 | ||
4431 | save_gr |= (1 << i); | |
4432 | } | |
4433 | ||
4434 | /* Turn the Entry_FR field into a bitmask too. */ | |
4435 | save_fr = 0; | |
4436 | for (i = 12; i < u->Entry_FR + 12; i++) | |
4437 | save_fr |= (1 << i); | |
4438 | ||
4439 | /* The frame always represents the value of %sp at entry to the | |
4440 | current function (and is thus equivalent to the "saved" stack | |
4441 | pointer. */ | |
ef6e7e13 | 4442 | frame_saved_regs[SP_REGNUM] = get_frame_base (frame_info); |
c906108c SS |
4443 | |
4444 | /* Loop until we find everything of interest or hit a branch. | |
4445 | ||
4446 | For unoptimized GCC code and for any HP CC code this will never ever | |
4447 | examine any user instructions. | |
4448 | ||
7be570e7 | 4449 | For optimized GCC code we're faced with problems. GCC will schedule |
c906108c SS |
4450 | its prologue and make prologue instructions available for delay slot |
4451 | filling. The end result is user code gets mixed in with the prologue | |
4452 | and a prologue instruction may be in the delay slot of the first branch | |
4453 | or call. | |
4454 | ||
4455 | Some unexpected things are expected with debugging optimized code, so | |
4456 | we allow this routine to walk past user instructions in optimized | |
4457 | GCC code. */ | |
d4f3574e SS |
4458 | final_iteration = 0; |
4459 | while ((save_gr || save_fr || save_rp || save_sp || stack_remaining > 0) | |
ef6e7e13 | 4460 | && pc <= get_frame_pc (frame_info)) |
c906108c SS |
4461 | { |
4462 | status = target_read_memory (pc, buf, 4); | |
4463 | inst = extract_unsigned_integer (buf, 4); | |
4464 | ||
4465 | /* Yow! */ | |
4466 | if (status != 0) | |
4467 | return; | |
4468 | ||
4469 | /* Note the interesting effects of this instruction. */ | |
4470 | stack_remaining -= prologue_inst_adjust_sp (inst); | |
4471 | ||
104c1213 JM |
4472 | /* There are limited ways to store the return pointer into the |
4473 | stack. */ | |
c2c6d25f | 4474 | if (inst == 0x6bc23fd9) /* stw rp,-0x14(sr0,sp) */ |
c906108c SS |
4475 | { |
4476 | save_rp = 0; | |
ef6e7e13 | 4477 | frame_saved_regs[RP_REGNUM] = get_frame_base (frame_info) - 20; |
c906108c | 4478 | } |
c2c6d25f JM |
4479 | else if (inst == 0x0fc212c1) /* std rp,-0x10(sr0,sp) */ |
4480 | { | |
4481 | save_rp = 0; | |
ef6e7e13 | 4482 | frame_saved_regs[RP_REGNUM] = get_frame_base (frame_info) - 16; |
c2c6d25f | 4483 | } |
c906108c | 4484 | |
104c1213 JM |
4485 | /* Note if we saved SP into the stack. This also happens to indicate |
4486 | the location of the saved frame pointer. */ | |
c2c6d25f JM |
4487 | if ( (inst & 0xffffc000) == 0x6fc10000 /* stw,ma r1,N(sr0,sp) */ |
4488 | || (inst & 0xffffc00c) == 0x73c10008) /* std,ma r1,N(sr0,sp) */ | |
104c1213 | 4489 | { |
0ba6dca9 | 4490 | frame_saved_regs[DEPRECATED_FP_REGNUM] = get_frame_base (frame_info); |
104c1213 JM |
4491 | save_sp = 0; |
4492 | } | |
c906108c SS |
4493 | |
4494 | /* Account for general and floating-point register saves. */ | |
4495 | reg = inst_saves_gr (inst); | |
4496 | if (reg >= 3 && reg <= 18 | |
0ba6dca9 | 4497 | && (!u->Save_SP || reg != DEPRECATED_FP_REGNUM)) |
c906108c SS |
4498 | { |
4499 | save_gr &= ~(1 << reg); | |
4500 | ||
4501 | /* stwm with a positive displacement is a *post modify*. */ | |
4502 | if ((inst >> 26) == 0x1b | |
4503 | && extract_14 (inst) >= 0) | |
ef6e7e13 | 4504 | frame_saved_regs[reg] = get_frame_base (frame_info); |
104c1213 | 4505 | /* A std has explicit post_modify forms. */ |
56132691 | 4506 | else if ((inst & 0xfc00000c) == 0x70000008) |
ef6e7e13 | 4507 | frame_saved_regs[reg] = get_frame_base (frame_info); |
c906108c SS |
4508 | else |
4509 | { | |
104c1213 JM |
4510 | CORE_ADDR offset; |
4511 | ||
4512 | if ((inst >> 26) == 0x1c) | |
d4f3574e | 4513 | offset = (inst & 0x1 ? -1 << 13 : 0) | (((inst >> 4) & 0x3ff) << 3); |
104c1213 JM |
4514 | else if ((inst >> 26) == 0x03) |
4515 | offset = low_sign_extend (inst & 0x1f, 5); | |
4516 | else | |
4517 | offset = extract_14 (inst); | |
4518 | ||
c906108c SS |
4519 | /* Handle code with and without frame pointers. */ |
4520 | if (u->Save_SP) | |
43bd9a9e | 4521 | frame_saved_regs[reg] |
ef6e7e13 | 4522 | = get_frame_base (frame_info) + offset; |
c906108c | 4523 | else |
43bd9a9e | 4524 | frame_saved_regs[reg] |
ef6e7e13 | 4525 | = (get_frame_base (frame_info) + (u->Total_frame_size << 3) |
104c1213 | 4526 | + offset); |
c906108c SS |
4527 | } |
4528 | } | |
4529 | ||
4530 | ||
4531 | /* GCC handles callee saved FP regs a little differently. | |
4532 | ||
c5aa993b JM |
4533 | It emits an instruction to put the value of the start of |
4534 | the FP store area into %r1. It then uses fstds,ma with | |
4535 | a basereg of %r1 for the stores. | |
c906108c | 4536 | |
c5aa993b JM |
4537 | HP CC emits them at the current stack pointer modifying |
4538 | the stack pointer as it stores each register. */ | |
c906108c SS |
4539 | |
4540 | /* ldo X(%r3),%r1 or ldo X(%r30),%r1. */ | |
4541 | if ((inst & 0xffffc000) == 0x34610000 | |
4542 | || (inst & 0xffffc000) == 0x37c10000) | |
4543 | fp_loc = extract_14 (inst); | |
c5aa993b | 4544 | |
c906108c SS |
4545 | reg = inst_saves_fr (inst); |
4546 | if (reg >= 12 && reg <= 21) | |
4547 | { | |
4548 | /* Note +4 braindamage below is necessary because the FP status | |
4549 | registers are internally 8 registers rather than the expected | |
4550 | 4 registers. */ | |
4551 | save_fr &= ~(1 << reg); | |
4552 | if (fp_loc == -1) | |
4553 | { | |
4554 | /* 1st HP CC FP register store. After this instruction | |
c5aa993b JM |
4555 | we've set enough state that the GCC and HPCC code are |
4556 | both handled in the same manner. */ | |
ef6e7e13 | 4557 | frame_saved_regs[reg + FP4_REGNUM + 4] = get_frame_base (frame_info); |
c906108c SS |
4558 | fp_loc = 8; |
4559 | } | |
4560 | else | |
4561 | { | |
43bd9a9e | 4562 | frame_saved_regs[reg + FP0_REGNUM + 4] |
ef6e7e13 | 4563 | = get_frame_base (frame_info) + fp_loc; |
c906108c SS |
4564 | fp_loc += 8; |
4565 | } | |
4566 | } | |
4567 | ||
39f77062 | 4568 | /* Quit if we hit any kind of branch the previous iteration. */ |
d4f3574e | 4569 | if (final_iteration) |
c906108c SS |
4570 | break; |
4571 | ||
d4f3574e SS |
4572 | /* We want to look precisely one instruction beyond the branch |
4573 | if we have not found everything yet. */ | |
4574 | if (is_branch (inst)) | |
4575 | final_iteration = 1; | |
4576 | ||
c906108c SS |
4577 | /* Bump the PC. */ |
4578 | pc += 4; | |
4579 | } | |
4580 | } | |
4581 | ||
43bd9a9e AC |
4582 | /* XXX - deprecated. This is a compatibility function for targets |
4583 | that do not yet implement DEPRECATED_FRAME_INIT_SAVED_REGS. */ | |
4584 | /* Find the addresses in which registers are saved in FRAME. */ | |
4585 | ||
343af405 | 4586 | static void |
43bd9a9e AC |
4587 | hppa_frame_init_saved_regs (struct frame_info *frame) |
4588 | { | |
1b1d3794 | 4589 | if (deprecated_get_frame_saved_regs (frame) == NULL) |
43bd9a9e | 4590 | frame_saved_regs_zalloc (frame); |
1b1d3794 | 4591 | hppa_frame_find_saved_regs (frame, deprecated_get_frame_saved_regs (frame)); |
43bd9a9e | 4592 | } |
c906108c | 4593 | |
26d08f08 AC |
4594 | struct hppa_frame_cache |
4595 | { | |
4596 | CORE_ADDR base; | |
4597 | struct trad_frame_saved_reg *saved_regs; | |
4598 | }; | |
4599 | ||
4600 | static struct hppa_frame_cache * | |
4601 | hppa_frame_cache (struct frame_info *next_frame, void **this_cache) | |
4602 | { | |
4603 | struct hppa_frame_cache *cache; | |
4604 | long saved_gr_mask; | |
4605 | long saved_fr_mask; | |
4606 | CORE_ADDR this_sp; | |
4607 | long frame_size; | |
4608 | struct unwind_table_entry *u; | |
4609 | int i; | |
4610 | ||
4611 | if ((*this_cache) != NULL) | |
4612 | return (*this_cache); | |
4613 | cache = FRAME_OBSTACK_ZALLOC (struct hppa_frame_cache); | |
4614 | (*this_cache) = cache; | |
4615 | cache->saved_regs = trad_frame_alloc_saved_regs (next_frame); | |
4616 | ||
4617 | /* Yow! */ | |
4618 | u = find_unwind_entry (frame_func_unwind (next_frame)); | |
4619 | if (!u) | |
4620 | return; | |
4621 | ||
4622 | /* Turn the Entry_GR field into a bitmask. */ | |
4623 | saved_gr_mask = 0; | |
4624 | for (i = 3; i < u->Entry_GR + 3; i++) | |
4625 | { | |
4626 | /* Frame pointer gets saved into a special location. */ | |
4627 | if (u->Save_SP && i == DEPRECATED_FP_REGNUM) | |
4628 | continue; | |
4629 | ||
4630 | saved_gr_mask |= (1 << i); | |
4631 | } | |
4632 | ||
4633 | /* Turn the Entry_FR field into a bitmask too. */ | |
4634 | saved_fr_mask = 0; | |
4635 | for (i = 12; i < u->Entry_FR + 12; i++) | |
4636 | saved_fr_mask |= (1 << i); | |
4637 | ||
4638 | /* Loop until we find everything of interest or hit a branch. | |
4639 | ||
4640 | For unoptimized GCC code and for any HP CC code this will never ever | |
4641 | examine any user instructions. | |
4642 | ||
4643 | For optimized GCC code we're faced with problems. GCC will schedule | |
4644 | its prologue and make prologue instructions available for delay slot | |
4645 | filling. The end result is user code gets mixed in with the prologue | |
4646 | and a prologue instruction may be in the delay slot of the first branch | |
4647 | or call. | |
4648 | ||
4649 | Some unexpected things are expected with debugging optimized code, so | |
4650 | we allow this routine to walk past user instructions in optimized | |
4651 | GCC code. */ | |
4652 | { | |
4653 | int final_iteration = 0; | |
4654 | CORE_ADDR pc; | |
4655 | CORE_ADDR end_pc = skip_prologue_using_sal (pc); | |
4656 | int looking_for_sp = u->Save_SP; | |
4657 | int looking_for_rp = u->Save_RP; | |
4658 | int fp_loc = -1; | |
4659 | if (end_pc == 0) | |
4660 | end_pc = frame_pc_unwind (next_frame); | |
4661 | frame_size = 0; | |
4662 | for (pc = frame_func_unwind (next_frame); | |
4663 | ((saved_gr_mask || saved_fr_mask | |
4664 | || looking_for_sp || looking_for_rp | |
4665 | || frame_size < (u->Total_frame_size << 3)) | |
4666 | && pc <= end_pc); | |
4667 | pc += 4) | |
4668 | { | |
4669 | int reg; | |
4670 | char buf4[4]; | |
4671 | long status = target_read_memory (pc, buf4, sizeof buf4); | |
4672 | long inst = extract_unsigned_integer (buf4, sizeof buf4); | |
4673 | ||
4674 | /* Note the interesting effects of this instruction. */ | |
4675 | frame_size += prologue_inst_adjust_sp (inst); | |
4676 | ||
4677 | /* There are limited ways to store the return pointer into the | |
4678 | stack. */ | |
4679 | if (inst == 0x6bc23fd9) /* stw rp,-0x14(sr0,sp) */ | |
4680 | { | |
4681 | looking_for_rp = 0; | |
4682 | cache->saved_regs[RP_REGNUM].addr = -20; | |
4683 | } | |
4684 | else if (inst == 0x0fc212c1) /* std rp,-0x10(sr0,sp) */ | |
4685 | { | |
4686 | looking_for_rp = 0; | |
4687 | cache->saved_regs[RP_REGNUM].addr = -16; | |
4688 | } | |
4689 | ||
4690 | /* Check to see if we saved SP into the stack. This also | |
4691 | happens to indicate the location of the saved frame | |
4692 | pointer. */ | |
4693 | if ((inst & 0xffffc000) == 0x6fc10000 /* stw,ma r1,N(sr0,sp) */ | |
4694 | || (inst & 0xffffc00c) == 0x73c10008) /* std,ma r1,N(sr0,sp) */ | |
4695 | { | |
4696 | looking_for_sp = 0; | |
4697 | cache->saved_regs[DEPRECATED_FP_REGNUM].addr = 0; | |
4698 | } | |
4699 | ||
4700 | /* Account for general and floating-point register saves. */ | |
4701 | reg = inst_saves_gr (inst); | |
4702 | if (reg >= 3 && reg <= 18 | |
4703 | && (!u->Save_SP || reg != DEPRECATED_FP_REGNUM)) | |
4704 | { | |
4705 | saved_gr_mask &= ~(1 << reg); | |
4706 | if ((inst >> 26) == 0x1b && extract_14 (inst) >= 0) | |
4707 | /* stwm with a positive displacement is a _post_ | |
4708 | _modify_. */ | |
4709 | cache->saved_regs[reg].addr = 0; | |
4710 | else if ((inst & 0xfc00000c) == 0x70000008) | |
4711 | /* A std has explicit post_modify forms. */ | |
4712 | cache->saved_regs[reg].addr = 0; | |
4713 | else | |
4714 | { | |
4715 | CORE_ADDR offset; | |
4716 | ||
4717 | if ((inst >> 26) == 0x1c) | |
4718 | offset = (inst & 0x1 ? -1 << 13 : 0) | (((inst >> 4) & 0x3ff) << 3); | |
4719 | else if ((inst >> 26) == 0x03) | |
4720 | offset = low_sign_extend (inst & 0x1f, 5); | |
4721 | else | |
4722 | offset = extract_14 (inst); | |
4723 | ||
4724 | /* Handle code with and without frame pointers. */ | |
4725 | if (u->Save_SP) | |
4726 | cache->saved_regs[reg].addr = offset; | |
4727 | else | |
4728 | cache->saved_regs[reg].addr = (u->Total_frame_size << 3) + offset; | |
4729 | } | |
4730 | } | |
4731 | ||
4732 | /* GCC handles callee saved FP regs a little differently. | |
4733 | ||
4734 | It emits an instruction to put the value of the start of | |
4735 | the FP store area into %r1. It then uses fstds,ma with a | |
4736 | basereg of %r1 for the stores. | |
4737 | ||
4738 | HP CC emits them at the current stack pointer modifying the | |
4739 | stack pointer as it stores each register. */ | |
4740 | ||
4741 | /* ldo X(%r3),%r1 or ldo X(%r30),%r1. */ | |
4742 | if ((inst & 0xffffc000) == 0x34610000 | |
4743 | || (inst & 0xffffc000) == 0x37c10000) | |
4744 | fp_loc = extract_14 (inst); | |
4745 | ||
4746 | reg = inst_saves_fr (inst); | |
4747 | if (reg >= 12 && reg <= 21) | |
4748 | { | |
4749 | /* Note +4 braindamage below is necessary because the FP | |
4750 | status registers are internally 8 registers rather than | |
4751 | the expected 4 registers. */ | |
4752 | saved_fr_mask &= ~(1 << reg); | |
4753 | if (fp_loc == -1) | |
4754 | { | |
4755 | /* 1st HP CC FP register store. After this | |
4756 | instruction we've set enough state that the GCC and | |
4757 | HPCC code are both handled in the same manner. */ | |
4758 | cache->saved_regs[reg + FP4_REGNUM + 4].addr = 0; | |
4759 | fp_loc = 8; | |
4760 | } | |
4761 | else | |
4762 | { | |
4763 | cache->saved_regs[reg + FP0_REGNUM + 4].addr = fp_loc; | |
4764 | fp_loc += 8; | |
4765 | } | |
4766 | } | |
4767 | ||
4768 | /* Quit if we hit any kind of branch the previous iteration. */ | |
4769 | if (final_iteration) | |
4770 | break; | |
4771 | /* We want to look precisely one instruction beyond the branch | |
4772 | if we have not found everything yet. */ | |
4773 | if (is_branch (inst)) | |
4774 | final_iteration = 1; | |
4775 | } | |
4776 | } | |
4777 | ||
4778 | { | |
4779 | /* The frame base always represents the value of %sp at entry to | |
4780 | the current function (and is thus equivalent to the "saved" | |
4781 | stack pointer. */ | |
4782 | CORE_ADDR this_sp = frame_unwind_register_unsigned (next_frame, SP_REGNUM); | |
4783 | /* FIXME: cagney/2004-02-22: This assumes that the frame has been | |
4784 | created. If it hasn't everything will be out-of-wack. */ | |
4785 | if (u->Save_SP && trad_frame_addr_p (cache->saved_regs, SP_REGNUM)) | |
4786 | /* Both we're expecting the SP to be saved and the SP has been | |
4787 | saved. The entry SP value is saved at this frame's SP | |
4788 | address. */ | |
4789 | cache->base = read_memory_integer (this_sp, TARGET_PTR_BIT / 8); | |
4790 | else | |
4791 | /* The prologue has been slowly allocating stack space. Adjust | |
4792 | the SP back. */ | |
4793 | cache->base = this_sp - frame_size; | |
4794 | trad_frame_set_value (cache->saved_regs, SP_REGNUM, cache->base); | |
4795 | } | |
4796 | ||
412275d5 AC |
4797 | /* The PC is found in the "return register", "Millicode" uses "r31" |
4798 | as the return register while normal code uses "rp". */ | |
26d08f08 | 4799 | if (u->Millicode) |
412275d5 | 4800 | cache->saved_regs[PCOQ_HEAD_REGNUM] = cache->saved_regs[31]; |
26d08f08 | 4801 | else |
412275d5 | 4802 | cache->saved_regs[PCOQ_HEAD_REGNUM] = cache->saved_regs[RP_REGNUM]; |
26d08f08 AC |
4803 | |
4804 | { | |
4805 | /* Convert all the offsets into addresses. */ | |
4806 | int reg; | |
4807 | for (reg = 0; reg < NUM_REGS; reg++) | |
4808 | { | |
4809 | if (trad_frame_addr_p (cache->saved_regs, reg)) | |
4810 | cache->saved_regs[reg].addr += cache->base; | |
4811 | } | |
4812 | } | |
4813 | ||
4814 | return (*this_cache); | |
4815 | } | |
4816 | ||
4817 | static void | |
4818 | hppa_frame_this_id (struct frame_info *next_frame, void **this_cache, | |
4819 | struct frame_id *this_id) | |
4820 | { | |
4821 | struct hppa_frame_cache *info = hppa_frame_cache (next_frame, this_cache); | |
4822 | (*this_id) = frame_id_build (info->base, frame_func_unwind (next_frame)); | |
4823 | } | |
4824 | ||
4825 | static void | |
4826 | hppa_frame_prev_register (struct frame_info *next_frame, | |
4827 | void **this_cache, | |
4828 | int regnum, int *optimizedp, | |
4829 | enum lval_type *lvalp, CORE_ADDR *addrp, | |
4830 | int *realnump, void *valuep) | |
4831 | { | |
4832 | struct hppa_frame_cache *info = hppa_frame_cache (next_frame, this_cache); | |
412275d5 AC |
4833 | struct gdbarch *gdbarch = get_frame_arch (next_frame); |
4834 | if (regnum == PCOQ_TAIL_REGNUM) | |
4835 | { | |
4836 | /* The PCOQ TAIL, or NPC, needs to be computed from the unwound | |
4837 | PC register. */ | |
4838 | *optimizedp = 0; | |
4839 | *lvalp = not_lval; | |
4840 | *addrp = 0; | |
4841 | *realnump = 0; | |
4842 | if (valuep) | |
4843 | { | |
4844 | int regsize = register_size (gdbarch, PCOQ_HEAD_REGNUM); | |
4845 | CORE_ADDR pc; | |
4846 | int optimized; | |
4847 | enum lval_type lval; | |
4848 | CORE_ADDR addr; | |
4849 | int realnum; | |
4850 | bfd_byte value[MAX_REGISTER_SIZE]; | |
4851 | trad_frame_prev_register (next_frame, info->saved_regs, | |
4852 | PCOQ_HEAD_REGNUM, &optimized, &lval, &addr, | |
4853 | &realnum, &value); | |
4854 | pc = extract_unsigned_integer (&value, regsize); | |
4855 | store_unsigned_integer (valuep, regsize, pc + 4); | |
4856 | } | |
4857 | } | |
4858 | else | |
4859 | { | |
4860 | trad_frame_prev_register (next_frame, info->saved_regs, regnum, | |
4861 | optimizedp, lvalp, addrp, realnump, valuep); | |
4862 | } | |
26d08f08 AC |
4863 | } |
4864 | ||
4865 | static const struct frame_unwind hppa_frame_unwind = | |
4866 | { | |
4867 | NORMAL_FRAME, | |
4868 | hppa_frame_this_id, | |
4869 | hppa_frame_prev_register | |
4870 | }; | |
4871 | ||
4872 | static const struct frame_unwind * | |
4873 | hppa_frame_unwind_sniffer (struct frame_info *next_frame) | |
4874 | { | |
4875 | return &hppa_frame_unwind; | |
4876 | } | |
4877 | ||
4878 | static CORE_ADDR | |
4879 | hppa_frame_base_address (struct frame_info *next_frame, | |
4880 | void **this_cache) | |
4881 | { | |
4882 | struct hppa_frame_cache *info = hppa_frame_cache (next_frame, | |
4883 | this_cache); | |
4884 | return info->base; | |
4885 | } | |
4886 | ||
4887 | static const struct frame_base hppa_frame_base = { | |
4888 | &hppa_frame_unwind, | |
4889 | hppa_frame_base_address, | |
4890 | hppa_frame_base_address, | |
4891 | hppa_frame_base_address | |
4892 | }; | |
4893 | ||
4894 | static const struct frame_base * | |
4895 | hppa_frame_base_sniffer (struct frame_info *next_frame) | |
4896 | { | |
4897 | return &hppa_frame_base; | |
4898 | } | |
4899 | ||
4900 | static struct frame_id | |
4901 | hppa_unwind_dummy_id (struct gdbarch *gdbarch, struct frame_info *next_frame) | |
4902 | { | |
4903 | return frame_id_build (frame_unwind_register_unsigned (next_frame, | |
4904 | SP_REGNUM), | |
4905 | frame_pc_unwind (next_frame)); | |
4906 | } | |
4907 | ||
4908 | static CORE_ADDR | |
4909 | hppa_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame) | |
4910 | { | |
4911 | return frame_unwind_register_signed (next_frame, PC_REGNUM) & ~3; | |
4912 | } | |
4913 | ||
c906108c SS |
4914 | /* Exception handling support for the HP-UX ANSI C++ compiler. |
4915 | The compiler (aCC) provides a callback for exception events; | |
4916 | GDB can set a breakpoint on this callback and find out what | |
4917 | exception event has occurred. */ | |
4918 | ||
4919 | /* The name of the hook to be set to point to the callback function */ | |
c5aa993b JM |
4920 | static char HP_ACC_EH_notify_hook[] = "__eh_notify_hook"; |
4921 | /* The name of the function to be used to set the hook value */ | |
4922 | static char HP_ACC_EH_set_hook_value[] = "__eh_set_hook_value"; | |
4923 | /* The name of the callback function in end.o */ | |
c906108c | 4924 | static char HP_ACC_EH_notify_callback[] = "__d_eh_notify_callback"; |
c5aa993b JM |
4925 | /* Name of function in end.o on which a break is set (called by above) */ |
4926 | static char HP_ACC_EH_break[] = "__d_eh_break"; | |
4927 | /* Name of flag (in end.o) that enables catching throws */ | |
4928 | static char HP_ACC_EH_catch_throw[] = "__d_eh_catch_throw"; | |
4929 | /* Name of flag (in end.o) that enables catching catching */ | |
4930 | static char HP_ACC_EH_catch_catch[] = "__d_eh_catch_catch"; | |
4931 | /* The enum used by aCC */ | |
4932 | typedef enum | |
4933 | { | |
4934 | __EH_NOTIFY_THROW, | |
4935 | __EH_NOTIFY_CATCH | |
4936 | } | |
4937 | __eh_notification; | |
c906108c SS |
4938 | |
4939 | /* Is exception-handling support available with this executable? */ | |
4940 | static int hp_cxx_exception_support = 0; | |
4941 | /* Has the initialize function been run? */ | |
4942 | int hp_cxx_exception_support_initialized = 0; | |
4943 | /* Similar to above, but imported from breakpoint.c -- non-target-specific */ | |
4944 | extern int exception_support_initialized; | |
4945 | /* Address of __eh_notify_hook */ | |
a0b3c4fd | 4946 | static CORE_ADDR eh_notify_hook_addr = 0; |
c906108c | 4947 | /* Address of __d_eh_notify_callback */ |
a0b3c4fd | 4948 | static CORE_ADDR eh_notify_callback_addr = 0; |
c906108c | 4949 | /* Address of __d_eh_break */ |
a0b3c4fd | 4950 | static CORE_ADDR eh_break_addr = 0; |
c906108c | 4951 | /* Address of __d_eh_catch_catch */ |
a0b3c4fd | 4952 | static CORE_ADDR eh_catch_catch_addr = 0; |
c906108c | 4953 | /* Address of __d_eh_catch_throw */ |
a0b3c4fd | 4954 | static CORE_ADDR eh_catch_throw_addr = 0; |
c906108c | 4955 | /* Sal for __d_eh_break */ |
a0b3c4fd | 4956 | static struct symtab_and_line *break_callback_sal = 0; |
c906108c SS |
4957 | |
4958 | /* Code in end.c expects __d_pid to be set in the inferior, | |
4959 | otherwise __d_eh_notify_callback doesn't bother to call | |
4960 | __d_eh_break! So we poke the pid into this symbol | |
4961 | ourselves. | |
4962 | 0 => success | |
c5aa993b | 4963 | 1 => failure */ |
c906108c | 4964 | int |
fba45db2 | 4965 | setup_d_pid_in_inferior (void) |
c906108c SS |
4966 | { |
4967 | CORE_ADDR anaddr; | |
c5aa993b JM |
4968 | struct minimal_symbol *msymbol; |
4969 | char buf[4]; /* FIXME 32x64? */ | |
4970 | ||
c906108c SS |
4971 | /* Slam the pid of the process into __d_pid; failing is only a warning! */ |
4972 | msymbol = lookup_minimal_symbol ("__d_pid", NULL, symfile_objfile); | |
4973 | if (msymbol == NULL) | |
4974 | { | |
4975 | warning ("Unable to find __d_pid symbol in object file."); | |
4976 | warning ("Suggest linking executable with -g (links in /opt/langtools/lib/end.o)."); | |
4977 | return 1; | |
4978 | } | |
4979 | ||
4980 | anaddr = SYMBOL_VALUE_ADDRESS (msymbol); | |
39f77062 | 4981 | store_unsigned_integer (buf, 4, PIDGET (inferior_ptid)); /* FIXME 32x64? */ |
c5aa993b | 4982 | if (target_write_memory (anaddr, buf, 4)) /* FIXME 32x64? */ |
c906108c SS |
4983 | { |
4984 | warning ("Unable to write __d_pid"); | |
4985 | warning ("Suggest linking executable with -g (links in /opt/langtools/lib/end.o)."); | |
4986 | return 1; | |
4987 | } | |
4988 | return 0; | |
4989 | } | |
4990 | ||
4991 | /* Initialize exception catchpoint support by looking for the | |
4992 | necessary hooks/callbacks in end.o, etc., and set the hook value to | |
4993 | point to the required debug function | |
4994 | ||
4995 | Return 0 => failure | |
c5aa993b | 4996 | 1 => success */ |
c906108c SS |
4997 | |
4998 | static int | |
fba45db2 | 4999 | initialize_hp_cxx_exception_support (void) |
c906108c SS |
5000 | { |
5001 | struct symtabs_and_lines sals; | |
c5aa993b JM |
5002 | struct cleanup *old_chain; |
5003 | struct cleanup *canonical_strings_chain = NULL; | |
c906108c | 5004 | int i; |
c5aa993b JM |
5005 | char *addr_start; |
5006 | char *addr_end = NULL; | |
5007 | char **canonical = (char **) NULL; | |
c906108c | 5008 | int thread = -1; |
c5aa993b JM |
5009 | struct symbol *sym = NULL; |
5010 | struct minimal_symbol *msym = NULL; | |
5011 | struct objfile *objfile; | |
c906108c SS |
5012 | asection *shlib_info; |
5013 | ||
5014 | /* Detect and disallow recursion. On HP-UX with aCC, infinite | |
5015 | recursion is a possibility because finding the hook for exception | |
5016 | callbacks involves making a call in the inferior, which means | |
5017 | re-inserting breakpoints which can re-invoke this code */ | |
5018 | ||
c5aa993b JM |
5019 | static int recurse = 0; |
5020 | if (recurse > 0) | |
c906108c SS |
5021 | { |
5022 | hp_cxx_exception_support_initialized = 0; | |
5023 | exception_support_initialized = 0; | |
5024 | return 0; | |
5025 | } | |
5026 | ||
5027 | hp_cxx_exception_support = 0; | |
5028 | ||
5029 | /* First check if we have seen any HP compiled objects; if not, | |
5030 | it is very unlikely that HP's idiosyncratic callback mechanism | |
5031 | for exception handling debug support will be available! | |
5032 | This will percolate back up to breakpoint.c, where our callers | |
5033 | will decide to try the g++ exception-handling support instead. */ | |
5034 | if (!hp_som_som_object_present) | |
5035 | return 0; | |
c5aa993b | 5036 | |
c906108c SS |
5037 | /* We have a SOM executable with SOM debug info; find the hooks */ |
5038 | ||
5039 | /* First look for the notify hook provided by aCC runtime libs */ | |
5040 | /* If we find this symbol, we conclude that the executable must | |
5041 | have HP aCC exception support built in. If this symbol is not | |
5042 | found, even though we're a HP SOM-SOM file, we may have been | |
5043 | built with some other compiler (not aCC). This results percolates | |
5044 | back up to our callers in breakpoint.c which can decide to | |
5045 | try the g++ style of exception support instead. | |
5046 | If this symbol is found but the other symbols we require are | |
5047 | not found, there is something weird going on, and g++ support | |
5048 | should *not* be tried as an alternative. | |
c5aa993b | 5049 | |
c906108c SS |
5050 | ASSUMPTION: Only HP aCC code will have __eh_notify_hook defined. |
5051 | ASSUMPTION: HP aCC and g++ modules cannot be linked together. */ | |
c5aa993b | 5052 | |
c906108c SS |
5053 | /* libCsup has this hook; it'll usually be non-debuggable */ |
5054 | msym = lookup_minimal_symbol (HP_ACC_EH_notify_hook, NULL, NULL); | |
5055 | if (msym) | |
5056 | { | |
5057 | eh_notify_hook_addr = SYMBOL_VALUE_ADDRESS (msym); | |
5058 | hp_cxx_exception_support = 1; | |
c5aa993b | 5059 | } |
c906108c SS |
5060 | else |
5061 | { | |
5062 | warning ("Unable to find exception callback hook (%s).", HP_ACC_EH_notify_hook); | |
5063 | warning ("Executable may not have been compiled debuggable with HP aCC."); | |
5064 | warning ("GDB will be unable to intercept exception events."); | |
5065 | eh_notify_hook_addr = 0; | |
5066 | hp_cxx_exception_support = 0; | |
5067 | return 0; | |
5068 | } | |
5069 | ||
c906108c | 5070 | /* Next look for the notify callback routine in end.o */ |
c5aa993b | 5071 | /* This is always available in the SOM symbol dictionary if end.o is linked in */ |
c906108c SS |
5072 | msym = lookup_minimal_symbol (HP_ACC_EH_notify_callback, NULL, NULL); |
5073 | if (msym) | |
5074 | { | |
5075 | eh_notify_callback_addr = SYMBOL_VALUE_ADDRESS (msym); | |
5076 | hp_cxx_exception_support = 1; | |
c5aa993b JM |
5077 | } |
5078 | else | |
c906108c SS |
5079 | { |
5080 | warning ("Unable to find exception callback routine (%s).", HP_ACC_EH_notify_callback); | |
5081 | warning ("Suggest linking executable with -g (links in /opt/langtools/lib/end.o)."); | |
5082 | warning ("GDB will be unable to intercept exception events."); | |
5083 | eh_notify_callback_addr = 0; | |
5084 | return 0; | |
5085 | } | |
5086 | ||
53a5351d | 5087 | #ifndef GDB_TARGET_IS_HPPA_20W |
c906108c SS |
5088 | /* Check whether the executable is dynamically linked or archive bound */ |
5089 | /* With an archive-bound executable we can use the raw addresses we find | |
5090 | for the callback function, etc. without modification. For an executable | |
5091 | with shared libraries, we have to do more work to find the plabel, which | |
5092 | can be the target of a call through $$dyncall from the aCC runtime support | |
5093 | library (libCsup) which is linked shared by default by aCC. */ | |
5094 | /* This test below was copied from somsolib.c/somread.c. It may not be a very | |
c5aa993b | 5095 | reliable one to test that an executable is linked shared. pai/1997-07-18 */ |
c906108c SS |
5096 | shlib_info = bfd_get_section_by_name (symfile_objfile->obfd, "$SHLIB_INFO$"); |
5097 | if (shlib_info && (bfd_section_size (symfile_objfile->obfd, shlib_info) != 0)) | |
5098 | { | |
5099 | /* The minsym we have has the local code address, but that's not the | |
5100 | plabel that can be used by an inter-load-module call. */ | |
5101 | /* Find solib handle for main image (which has end.o), and use that | |
5102 | and the min sym as arguments to __d_shl_get() (which does the equivalent | |
c5aa993b | 5103 | of shl_findsym()) to find the plabel. */ |
c906108c SS |
5104 | |
5105 | args_for_find_stub args; | |
5106 | static char message[] = "Error while finding exception callback hook:\n"; | |
c5aa993b | 5107 | |
c906108c SS |
5108 | args.solib_handle = som_solib_get_solib_by_pc (eh_notify_callback_addr); |
5109 | args.msym = msym; | |
a0b3c4fd | 5110 | args.return_val = 0; |
c5aa993b | 5111 | |
c906108c | 5112 | recurse++; |
4efb68b1 | 5113 | catch_errors (cover_find_stub_with_shl_get, &args, message, |
a0b3c4fd JM |
5114 | RETURN_MASK_ALL); |
5115 | eh_notify_callback_addr = args.return_val; | |
c906108c | 5116 | recurse--; |
c5aa993b | 5117 | |
c906108c | 5118 | exception_catchpoints_are_fragile = 1; |
c5aa993b | 5119 | |
c906108c | 5120 | if (!eh_notify_callback_addr) |
c5aa993b JM |
5121 | { |
5122 | /* We can get here either if there is no plabel in the export list | |
1faa59a8 | 5123 | for the main image, or if something strange happened (?) */ |
c5aa993b JM |
5124 | warning ("Couldn't find a plabel (indirect function label) for the exception callback."); |
5125 | warning ("GDB will not be able to intercept exception events."); | |
5126 | return 0; | |
5127 | } | |
c906108c SS |
5128 | } |
5129 | else | |
5130 | exception_catchpoints_are_fragile = 0; | |
53a5351d | 5131 | #endif |
c906108c | 5132 | |
c906108c | 5133 | /* Now, look for the breakpointable routine in end.o */ |
c5aa993b | 5134 | /* This should also be available in the SOM symbol dict. if end.o linked in */ |
c906108c SS |
5135 | msym = lookup_minimal_symbol (HP_ACC_EH_break, NULL, NULL); |
5136 | if (msym) | |
5137 | { | |
5138 | eh_break_addr = SYMBOL_VALUE_ADDRESS (msym); | |
5139 | hp_cxx_exception_support = 1; | |
c5aa993b | 5140 | } |
c906108c SS |
5141 | else |
5142 | { | |
5143 | warning ("Unable to find exception callback routine to set breakpoint (%s).", HP_ACC_EH_break); | |
5144 | warning ("Suggest linking executable with -g (link in /opt/langtools/lib/end.o)."); | |
5145 | warning ("GDB will be unable to intercept exception events."); | |
5146 | eh_break_addr = 0; | |
5147 | return 0; | |
5148 | } | |
5149 | ||
c906108c SS |
5150 | /* Next look for the catch enable flag provided in end.o */ |
5151 | sym = lookup_symbol (HP_ACC_EH_catch_catch, (struct block *) NULL, | |
176620f1 | 5152 | VAR_DOMAIN, 0, (struct symtab **) NULL); |
c5aa993b | 5153 | if (sym) /* sometimes present in debug info */ |
c906108c SS |
5154 | { |
5155 | eh_catch_catch_addr = SYMBOL_VALUE_ADDRESS (sym); | |
5156 | hp_cxx_exception_support = 1; | |
5157 | } | |
c5aa993b JM |
5158 | else |
5159 | /* otherwise look in SOM symbol dict. */ | |
c906108c SS |
5160 | { |
5161 | msym = lookup_minimal_symbol (HP_ACC_EH_catch_catch, NULL, NULL); | |
5162 | if (msym) | |
c5aa993b JM |
5163 | { |
5164 | eh_catch_catch_addr = SYMBOL_VALUE_ADDRESS (msym); | |
5165 | hp_cxx_exception_support = 1; | |
5166 | } | |
c906108c | 5167 | else |
c5aa993b JM |
5168 | { |
5169 | warning ("Unable to enable interception of exception catches."); | |
5170 | warning ("Executable may not have been compiled debuggable with HP aCC."); | |
5171 | warning ("Suggest linking executable with -g (link in /opt/langtools/lib/end.o)."); | |
5172 | return 0; | |
5173 | } | |
c906108c SS |
5174 | } |
5175 | ||
c906108c SS |
5176 | /* Next look for the catch enable flag provided end.o */ |
5177 | sym = lookup_symbol (HP_ACC_EH_catch_catch, (struct block *) NULL, | |
176620f1 | 5178 | VAR_DOMAIN, 0, (struct symtab **) NULL); |
c5aa993b | 5179 | if (sym) /* sometimes present in debug info */ |
c906108c SS |
5180 | { |
5181 | eh_catch_throw_addr = SYMBOL_VALUE_ADDRESS (sym); | |
5182 | hp_cxx_exception_support = 1; | |
5183 | } | |
c5aa993b JM |
5184 | else |
5185 | /* otherwise look in SOM symbol dict. */ | |
c906108c SS |
5186 | { |
5187 | msym = lookup_minimal_symbol (HP_ACC_EH_catch_throw, NULL, NULL); | |
5188 | if (msym) | |
c5aa993b JM |
5189 | { |
5190 | eh_catch_throw_addr = SYMBOL_VALUE_ADDRESS (msym); | |
5191 | hp_cxx_exception_support = 1; | |
5192 | } | |
c906108c | 5193 | else |
c5aa993b JM |
5194 | { |
5195 | warning ("Unable to enable interception of exception throws."); | |
5196 | warning ("Executable may not have been compiled debuggable with HP aCC."); | |
5197 | warning ("Suggest linking executable with -g (link in /opt/langtools/lib/end.o)."); | |
5198 | return 0; | |
5199 | } | |
c906108c SS |
5200 | } |
5201 | ||
c5aa993b JM |
5202 | /* Set the flags */ |
5203 | hp_cxx_exception_support = 2; /* everything worked so far */ | |
c906108c SS |
5204 | hp_cxx_exception_support_initialized = 1; |
5205 | exception_support_initialized = 1; | |
5206 | ||
5207 | return 1; | |
5208 | } | |
5209 | ||
5210 | /* Target operation for enabling or disabling interception of | |
5211 | exception events. | |
5212 | KIND is either EX_EVENT_THROW or EX_EVENT_CATCH | |
5213 | ENABLE is either 0 (disable) or 1 (enable). | |
5214 | Return value is NULL if no support found; | |
5215 | -1 if something went wrong, | |
5216 | or a pointer to a symtab/line struct if the breakpointable | |
c5aa993b | 5217 | address was found. */ |
c906108c | 5218 | |
c5aa993b | 5219 | struct symtab_and_line * |
fba45db2 | 5220 | child_enable_exception_callback (enum exception_event_kind kind, int enable) |
c906108c SS |
5221 | { |
5222 | char buf[4]; | |
5223 | ||
5224 | if (!exception_support_initialized || !hp_cxx_exception_support_initialized) | |
5225 | if (!initialize_hp_cxx_exception_support ()) | |
5226 | return NULL; | |
5227 | ||
5228 | switch (hp_cxx_exception_support) | |
5229 | { | |
c5aa993b JM |
5230 | case 0: |
5231 | /* Assuming no HP support at all */ | |
5232 | return NULL; | |
5233 | case 1: | |
5234 | /* HP support should be present, but something went wrong */ | |
5235 | return (struct symtab_and_line *) -1; /* yuck! */ | |
5236 | /* there may be other cases in the future */ | |
c906108c | 5237 | } |
c5aa993b | 5238 | |
c906108c | 5239 | /* Set the EH hook to point to the callback routine */ |
c5aa993b | 5240 | store_unsigned_integer (buf, 4, enable ? eh_notify_callback_addr : 0); /* FIXME 32x64 problem */ |
c906108c | 5241 | /* pai: (temp) FIXME should there be a pack operation first? */ |
c5aa993b | 5242 | if (target_write_memory (eh_notify_hook_addr, buf, 4)) /* FIXME 32x64 problem */ |
c906108c SS |
5243 | { |
5244 | warning ("Could not write to target memory for exception event callback."); | |
5245 | warning ("Interception of exception events may not work."); | |
c5aa993b | 5246 | return (struct symtab_and_line *) -1; |
c906108c SS |
5247 | } |
5248 | if (enable) | |
5249 | { | |
c5aa993b | 5250 | /* Ensure that __d_pid is set up correctly -- end.c code checks this. :-( */ |
39f77062 | 5251 | if (PIDGET (inferior_ptid) > 0) |
c5aa993b JM |
5252 | { |
5253 | if (setup_d_pid_in_inferior ()) | |
5254 | return (struct symtab_and_line *) -1; | |
5255 | } | |
c906108c | 5256 | else |
c5aa993b | 5257 | { |
104c1213 JM |
5258 | warning ("Internal error: Invalid inferior pid? Cannot intercept exception events."); |
5259 | return (struct symtab_and_line *) -1; | |
c5aa993b | 5260 | } |
c906108c | 5261 | } |
c5aa993b | 5262 | |
c906108c SS |
5263 | switch (kind) |
5264 | { | |
c5aa993b JM |
5265 | case EX_EVENT_THROW: |
5266 | store_unsigned_integer (buf, 4, enable ? 1 : 0); | |
5267 | if (target_write_memory (eh_catch_throw_addr, buf, 4)) /* FIXME 32x64? */ | |
5268 | { | |
5269 | warning ("Couldn't enable exception throw interception."); | |
5270 | return (struct symtab_and_line *) -1; | |
5271 | } | |
5272 | break; | |
5273 | case EX_EVENT_CATCH: | |
5274 | store_unsigned_integer (buf, 4, enable ? 1 : 0); | |
5275 | if (target_write_memory (eh_catch_catch_addr, buf, 4)) /* FIXME 32x64? */ | |
5276 | { | |
5277 | warning ("Couldn't enable exception catch interception."); | |
5278 | return (struct symtab_and_line *) -1; | |
5279 | } | |
5280 | break; | |
104c1213 JM |
5281 | default: |
5282 | error ("Request to enable unknown or unsupported exception event."); | |
c906108c | 5283 | } |
c5aa993b | 5284 | |
c906108c SS |
5285 | /* Copy break address into new sal struct, malloc'ing if needed. */ |
5286 | if (!break_callback_sal) | |
5287 | { | |
5288 | break_callback_sal = (struct symtab_and_line *) xmalloc (sizeof (struct symtab_and_line)); | |
5289 | } | |
fe39c653 | 5290 | init_sal (break_callback_sal); |
c906108c SS |
5291 | break_callback_sal->symtab = NULL; |
5292 | break_callback_sal->pc = eh_break_addr; | |
5293 | break_callback_sal->line = 0; | |
5294 | break_callback_sal->end = eh_break_addr; | |
c5aa993b | 5295 | |
c906108c SS |
5296 | return break_callback_sal; |
5297 | } | |
5298 | ||
c5aa993b | 5299 | /* Record some information about the current exception event */ |
c906108c | 5300 | static struct exception_event_record current_ex_event; |
c5aa993b JM |
5301 | /* Convenience struct */ |
5302 | static struct symtab_and_line null_symtab_and_line = | |
5303 | {NULL, 0, 0, 0}; | |
c906108c SS |
5304 | |
5305 | /* Report current exception event. Returns a pointer to a record | |
5306 | that describes the kind of the event, where it was thrown from, | |
5307 | and where it will be caught. More information may be reported | |
c5aa993b | 5308 | in the future */ |
c906108c | 5309 | struct exception_event_record * |
fba45db2 | 5310 | child_get_current_exception_event (void) |
c906108c | 5311 | { |
c5aa993b JM |
5312 | CORE_ADDR event_kind; |
5313 | CORE_ADDR throw_addr; | |
5314 | CORE_ADDR catch_addr; | |
c906108c SS |
5315 | struct frame_info *fi, *curr_frame; |
5316 | int level = 1; | |
5317 | ||
c5aa993b | 5318 | curr_frame = get_current_frame (); |
c906108c SS |
5319 | if (!curr_frame) |
5320 | return (struct exception_event_record *) NULL; | |
5321 | ||
5322 | /* Go up one frame to __d_eh_notify_callback, because at the | |
5323 | point when this code is executed, there's garbage in the | |
5324 | arguments of __d_eh_break. */ | |
5325 | fi = find_relative_frame (curr_frame, &level); | |
5326 | if (level != 0) | |
5327 | return (struct exception_event_record *) NULL; | |
5328 | ||
0f7d239c | 5329 | select_frame (fi); |
c906108c SS |
5330 | |
5331 | /* Read in the arguments */ | |
5332 | /* __d_eh_notify_callback() is called with 3 arguments: | |
c5aa993b JM |
5333 | 1. event kind catch or throw |
5334 | 2. the target address if known | |
5335 | 3. a flag -- not sure what this is. pai/1997-07-17 */ | |
5336 | event_kind = read_register (ARG0_REGNUM); | |
c906108c SS |
5337 | catch_addr = read_register (ARG1_REGNUM); |
5338 | ||
5339 | /* Now go down to a user frame */ | |
5340 | /* For a throw, __d_eh_break is called by | |
c5aa993b JM |
5341 | __d_eh_notify_callback which is called by |
5342 | __notify_throw which is called | |
5343 | from user code. | |
c906108c | 5344 | For a catch, __d_eh_break is called by |
c5aa993b JM |
5345 | __d_eh_notify_callback which is called by |
5346 | <stackwalking stuff> which is called by | |
5347 | __throw__<stuff> or __rethrow_<stuff> which is called | |
5348 | from user code. */ | |
5349 | /* FIXME: Don't use such magic numbers; search for the frames */ | |
c906108c SS |
5350 | level = (event_kind == EX_EVENT_THROW) ? 3 : 4; |
5351 | fi = find_relative_frame (curr_frame, &level); | |
5352 | if (level != 0) | |
5353 | return (struct exception_event_record *) NULL; | |
5354 | ||
0f7d239c | 5355 | select_frame (fi); |
ef6e7e13 | 5356 | throw_addr = get_frame_pc (fi); |
c906108c SS |
5357 | |
5358 | /* Go back to original (top) frame */ | |
0f7d239c | 5359 | select_frame (curr_frame); |
c906108c SS |
5360 | |
5361 | current_ex_event.kind = (enum exception_event_kind) event_kind; | |
5362 | current_ex_event.throw_sal = find_pc_line (throw_addr, 1); | |
5363 | current_ex_event.catch_sal = find_pc_line (catch_addr, 1); | |
5364 | ||
5365 | return ¤t_ex_event; | |
5366 | } | |
5367 | ||
9a043c1d AC |
5368 | /* Instead of this nasty cast, add a method pvoid() that prints out a |
5369 | host VOID data type (remember %p isn't portable). */ | |
5370 | ||
5371 | static CORE_ADDR | |
5372 | hppa_pointer_to_address_hack (void *ptr) | |
5373 | { | |
5374 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (builtin_type_void_data_ptr)); | |
5375 | return POINTER_TO_ADDRESS (builtin_type_void_data_ptr, &ptr); | |
5376 | } | |
5377 | ||
c906108c | 5378 | static void |
fba45db2 | 5379 | unwind_command (char *exp, int from_tty) |
c906108c SS |
5380 | { |
5381 | CORE_ADDR address; | |
5382 | struct unwind_table_entry *u; | |
5383 | ||
5384 | /* If we have an expression, evaluate it and use it as the address. */ | |
5385 | ||
5386 | if (exp != 0 && *exp != 0) | |
5387 | address = parse_and_eval_address (exp); | |
5388 | else | |
5389 | return; | |
5390 | ||
5391 | u = find_unwind_entry (address); | |
5392 | ||
5393 | if (!u) | |
5394 | { | |
5395 | printf_unfiltered ("Can't find unwind table entry for %s\n", exp); | |
5396 | return; | |
5397 | } | |
5398 | ||
ce414844 | 5399 | printf_unfiltered ("unwind_table_entry (0x%s):\n", |
9a043c1d | 5400 | paddr_nz (hppa_pointer_to_address_hack (u))); |
c906108c SS |
5401 | |
5402 | printf_unfiltered ("\tregion_start = "); | |
5403 | print_address (u->region_start, gdb_stdout); | |
5404 | ||
5405 | printf_unfiltered ("\n\tregion_end = "); | |
5406 | print_address (u->region_end, gdb_stdout); | |
5407 | ||
c906108c | 5408 | #define pif(FLD) if (u->FLD) printf_unfiltered (" "#FLD); |
c906108c SS |
5409 | |
5410 | printf_unfiltered ("\n\tflags ="); | |
5411 | pif (Cannot_unwind); | |
5412 | pif (Millicode); | |
5413 | pif (Millicode_save_sr0); | |
5414 | pif (Entry_SR); | |
5415 | pif (Args_stored); | |
5416 | pif (Variable_Frame); | |
5417 | pif (Separate_Package_Body); | |
5418 | pif (Frame_Extension_Millicode); | |
5419 | pif (Stack_Overflow_Check); | |
5420 | pif (Two_Instruction_SP_Increment); | |
5421 | pif (Ada_Region); | |
5422 | pif (Save_SP); | |
5423 | pif (Save_RP); | |
5424 | pif (Save_MRP_in_frame); | |
5425 | pif (extn_ptr_defined); | |
5426 | pif (Cleanup_defined); | |
5427 | pif (MPE_XL_interrupt_marker); | |
5428 | pif (HP_UX_interrupt_marker); | |
5429 | pif (Large_frame); | |
5430 | ||
5431 | putchar_unfiltered ('\n'); | |
5432 | ||
c906108c | 5433 | #define pin(FLD) printf_unfiltered ("\t"#FLD" = 0x%x\n", u->FLD); |
c906108c SS |
5434 | |
5435 | pin (Region_description); | |
5436 | pin (Entry_FR); | |
5437 | pin (Entry_GR); | |
5438 | pin (Total_frame_size); | |
5439 | } | |
c906108c | 5440 | |
c2c6d25f | 5441 | void |
fba45db2 | 5442 | hppa_skip_permanent_breakpoint (void) |
c2c6d25f JM |
5443 | { |
5444 | /* To step over a breakpoint instruction on the PA takes some | |
5445 | fiddling with the instruction address queue. | |
5446 | ||
5447 | When we stop at a breakpoint, the IA queue front (the instruction | |
5448 | we're executing now) points at the breakpoint instruction, and | |
5449 | the IA queue back (the next instruction to execute) points to | |
5450 | whatever instruction we would execute after the breakpoint, if it | |
5451 | were an ordinary instruction. This is the case even if the | |
5452 | breakpoint is in the delay slot of a branch instruction. | |
5453 | ||
5454 | Clearly, to step past the breakpoint, we need to set the queue | |
5455 | front to the back. But what do we put in the back? What | |
5456 | instruction comes after that one? Because of the branch delay | |
5457 | slot, the next insn is always at the back + 4. */ | |
5458 | write_register (PCOQ_HEAD_REGNUM, read_register (PCOQ_TAIL_REGNUM)); | |
5459 | write_register (PCSQ_HEAD_REGNUM, read_register (PCSQ_TAIL_REGNUM)); | |
5460 | ||
5461 | write_register (PCOQ_TAIL_REGNUM, read_register (PCOQ_TAIL_REGNUM) + 4); | |
5462 | /* We can leave the tail's space the same, since there's no jump. */ | |
5463 | } | |
5464 | ||
3ff7cf9e JB |
5465 | /* Same as hppa32_store_return_value(), but for the PA64 ABI. */ |
5466 | ||
5467 | void | |
5468 | hppa64_store_return_value (struct type *type, char *valbuf) | |
5469 | { | |
5470 | if (TYPE_CODE (type) == TYPE_CODE_FLT) | |
5471 | deprecated_write_register_bytes | |
62700349 | 5472 | (DEPRECATED_REGISTER_BYTE (FP4_REGNUM) |
3ff7cf9e JB |
5473 | + DEPRECATED_REGISTER_SIZE - TYPE_LENGTH (type), |
5474 | valbuf, TYPE_LENGTH (type)); | |
5475 | else if (is_integral_type(type)) | |
5476 | deprecated_write_register_bytes | |
62700349 | 5477 | (DEPRECATED_REGISTER_BYTE (28) |
3ff7cf9e JB |
5478 | + DEPRECATED_REGISTER_SIZE - TYPE_LENGTH (type), |
5479 | valbuf, TYPE_LENGTH (type)); | |
5480 | else if (TYPE_LENGTH (type) <= 8) | |
5481 | deprecated_write_register_bytes | |
62700349 | 5482 | (DEPRECATED_REGISTER_BYTE (28),valbuf, TYPE_LENGTH (type)); |
3ff7cf9e JB |
5483 | else if (TYPE_LENGTH (type) <= 16) |
5484 | { | |
62700349 | 5485 | deprecated_write_register_bytes (DEPRECATED_REGISTER_BYTE (28),valbuf, 8); |
3ff7cf9e | 5486 | deprecated_write_register_bytes |
62700349 | 5487 | (DEPRECATED_REGISTER_BYTE (29), valbuf + 8, TYPE_LENGTH (type) - 8); |
3ff7cf9e JB |
5488 | } |
5489 | } | |
5490 | ||
3ff7cf9e JB |
5491 | /* Same as hppa32_extract_return_value but for the PA64 ABI case. */ |
5492 | ||
5493 | void | |
5494 | hppa64_extract_return_value (struct type *type, char *regbuf, char *valbuf) | |
5495 | { | |
5496 | /* RM: Floats are returned in FR4R, doubles in FR4. | |
5497 | Integral values are in r28, padded on the left. | |
5498 | Aggregates less that 65 bits are in r28, right padded. | |
5499 | Aggregates upto 128 bits are in r28 and r29, right padded. */ | |
5500 | if (TYPE_CODE (type) == TYPE_CODE_FLT) | |
5501 | memcpy (valbuf, | |
62700349 | 5502 | regbuf + DEPRECATED_REGISTER_BYTE (FP4_REGNUM) |
3ff7cf9e JB |
5503 | + DEPRECATED_REGISTER_SIZE - TYPE_LENGTH (type), |
5504 | TYPE_LENGTH (type)); | |
5505 | else if (is_integral_type(type)) | |
5506 | memcpy (valbuf, | |
62700349 | 5507 | regbuf + DEPRECATED_REGISTER_BYTE (28) |
3ff7cf9e JB |
5508 | + DEPRECATED_REGISTER_SIZE - TYPE_LENGTH (type), |
5509 | TYPE_LENGTH (type)); | |
5510 | else if (TYPE_LENGTH (type) <= 8) | |
62700349 AC |
5511 | memcpy (valbuf, regbuf + DEPRECATED_REGISTER_BYTE (28), |
5512 | TYPE_LENGTH (type)); | |
3ff7cf9e JB |
5513 | else if (TYPE_LENGTH (type) <= 16) |
5514 | { | |
62700349 AC |
5515 | memcpy (valbuf, regbuf + DEPRECATED_REGISTER_BYTE (28), 8); |
5516 | memcpy (valbuf + 8, regbuf + DEPRECATED_REGISTER_BYTE (29), | |
5517 | TYPE_LENGTH (type) - 8); | |
3ff7cf9e JB |
5518 | } |
5519 | } | |
5520 | ||
d709c020 JB |
5521 | int |
5522 | hppa_reg_struct_has_addr (int gcc_p, struct type *type) | |
5523 | { | |
5524 | /* On the PA, any pass-by-value structure > 8 bytes is actually passed | |
5525 | via a pointer regardless of its type or the compiler used. */ | |
5526 | return (TYPE_LENGTH (type) > 8); | |
5527 | } | |
5528 | ||
5529 | int | |
5530 | hppa_inner_than (CORE_ADDR lhs, CORE_ADDR rhs) | |
5531 | { | |
5532 | /* Stack grows upward */ | |
5533 | return (lhs > rhs); | |
5534 | } | |
5535 | ||
3ff7cf9e JB |
5536 | CORE_ADDR |
5537 | hppa64_stack_align (CORE_ADDR sp) | |
5538 | { | |
5539 | /* The PA64 ABI mandates a 16 byte stack alignment. */ | |
5540 | return ((sp % 16) ? (sp + 15) & -16 : sp); | |
5541 | } | |
5542 | ||
d709c020 JB |
5543 | int |
5544 | hppa_pc_requires_run_before_use (CORE_ADDR pc) | |
5545 | { | |
5546 | /* Sometimes we may pluck out a minimal symbol that has a negative address. | |
5547 | ||
5548 | An example of this occurs when an a.out is linked against a foo.sl. | |
5549 | The foo.sl defines a global bar(), and the a.out declares a signature | |
5550 | for bar(). However, the a.out doesn't directly call bar(), but passes | |
5551 | its address in another call. | |
5552 | ||
5553 | If you have this scenario and attempt to "break bar" before running, | |
5554 | gdb will find a minimal symbol for bar() in the a.out. But that | |
5555 | symbol's address will be negative. What this appears to denote is | |
5556 | an index backwards from the base of the procedure linkage table (PLT) | |
5557 | into the data linkage table (DLT), the end of which is contiguous | |
5558 | with the start of the PLT. This is clearly not a valid address for | |
5559 | us to set a breakpoint on. | |
5560 | ||
5561 | Note that one must be careful in how one checks for a negative address. | |
5562 | 0xc0000000 is a legitimate address of something in a shared text | |
5563 | segment, for example. Since I don't know what the possible range | |
5564 | is of these "really, truly negative" addresses that come from the | |
5565 | minimal symbols, I'm resorting to the gross hack of checking the | |
5566 | top byte of the address for all 1's. Sigh. */ | |
5567 | ||
5568 | return (!target_has_stack && (pc & 0xFF000000)); | |
5569 | } | |
5570 | ||
5571 | int | |
5572 | hppa_instruction_nullified (void) | |
5573 | { | |
5574 | /* brobecker 2002/11/07: Couldn't we use a ULONGEST here? It would | |
5575 | avoid the type cast. I'm leaving it as is for now as I'm doing | |
5576 | semi-mechanical multiarching-related changes. */ | |
5577 | const int ipsw = (int) read_register (IPSW_REGNUM); | |
5578 | const int flags = (int) read_register (FLAGS_REGNUM); | |
5579 | ||
5580 | return ((ipsw & 0x00200000) && !(flags & 0x2)); | |
5581 | } | |
5582 | ||
60e1ff27 JB |
5583 | int |
5584 | hppa_register_raw_size (int reg_nr) | |
5585 | { | |
5586 | /* All registers have the same size. */ | |
b1e29e33 | 5587 | return DEPRECATED_REGISTER_SIZE; |
60e1ff27 JB |
5588 | } |
5589 | ||
d709c020 JB |
5590 | /* Index within the register vector of the first byte of the space i |
5591 | used for register REG_NR. */ | |
5592 | ||
5593 | int | |
5594 | hppa_register_byte (int reg_nr) | |
5595 | { | |
3ff7cf9e JB |
5596 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
5597 | ||
5598 | return reg_nr * tdep->bytes_per_address; | |
d709c020 JB |
5599 | } |
5600 | ||
5601 | /* Return the GDB type object for the "standard" data type of data | |
5602 | in register N. */ | |
5603 | ||
5604 | struct type * | |
3ff7cf9e | 5605 | hppa32_register_virtual_type (int reg_nr) |
d709c020 JB |
5606 | { |
5607 | if (reg_nr < FP4_REGNUM) | |
5608 | return builtin_type_int; | |
5609 | else | |
5610 | return builtin_type_float; | |
5611 | } | |
5612 | ||
3ff7cf9e JB |
5613 | /* Return the GDB type object for the "standard" data type of data |
5614 | in register N. hppa64 version. */ | |
5615 | ||
5616 | struct type * | |
5617 | hppa64_register_virtual_type (int reg_nr) | |
5618 | { | |
5619 | if (reg_nr < FP4_REGNUM) | |
5620 | return builtin_type_unsigned_long_long; | |
5621 | else | |
5622 | return builtin_type_double; | |
5623 | } | |
5624 | ||
d709c020 JB |
5625 | /* Store the address of the place in which to copy the structure the |
5626 | subroutine will return. This is called from call_function. */ | |
5627 | ||
5628 | void | |
5629 | hppa_store_struct_return (CORE_ADDR addr, CORE_ADDR sp) | |
5630 | { | |
5631 | write_register (28, addr); | |
5632 | } | |
d709c020 JB |
5633 | /* Return True if REGNUM is not a register available to the user |
5634 | through ptrace(). */ | |
5635 | ||
5636 | int | |
5637 | hppa_cannot_store_register (int regnum) | |
5638 | { | |
5639 | return (regnum == 0 | |
5640 | || regnum == PCSQ_HEAD_REGNUM | |
5641 | || (regnum >= PCSQ_TAIL_REGNUM && regnum < IPSW_REGNUM) | |
5642 | || (regnum > IPSW_REGNUM && regnum < FP4_REGNUM)); | |
5643 | ||
5644 | } | |
5645 | ||
d709c020 JB |
5646 | CORE_ADDR |
5647 | hppa_smash_text_address (CORE_ADDR addr) | |
5648 | { | |
5649 | /* The low two bits of the PC on the PA contain the privilege level. | |
5650 | Some genius implementing a (non-GCC) compiler apparently decided | |
5651 | this means that "addresses" in a text section therefore include a | |
5652 | privilege level, and thus symbol tables should contain these bits. | |
5653 | This seems like a bonehead thing to do--anyway, it seems to work | |
5654 | for our purposes to just ignore those bits. */ | |
5655 | ||
5656 | return (addr &= ~0x3); | |
5657 | } | |
5658 | ||
143985b7 AF |
5659 | /* Get the ith function argument for the current function. */ |
5660 | CORE_ADDR | |
5661 | hppa_fetch_pointer_argument (struct frame_info *frame, int argi, | |
5662 | struct type *type) | |
5663 | { | |
5664 | CORE_ADDR addr; | |
7f5f525d | 5665 | get_frame_register (frame, R0_REGNUM + 26 - argi, &addr); |
143985b7 AF |
5666 | return addr; |
5667 | } | |
5668 | ||
8e8b2dba MC |
5669 | /* Here is a table of C type sizes on hppa with various compiles |
5670 | and options. I measured this on PA 9000/800 with HP-UX 11.11 | |
5671 | and these compilers: | |
5672 | ||
5673 | /usr/ccs/bin/cc HP92453-01 A.11.01.21 | |
5674 | /opt/ansic/bin/cc HP92453-01 B.11.11.28706.GP | |
5675 | /opt/aCC/bin/aCC B3910B A.03.45 | |
5676 | gcc gcc 3.3.2 native hppa2.0w-hp-hpux11.11 | |
5677 | ||
5678 | cc : 1 2 4 4 8 : 4 8 -- : 4 4 | |
5679 | ansic +DA1.1 : 1 2 4 4 8 : 4 8 16 : 4 4 | |
5680 | ansic +DA2.0 : 1 2 4 4 8 : 4 8 16 : 4 4 | |
5681 | ansic +DA2.0W : 1 2 4 8 8 : 4 8 16 : 8 8 | |
5682 | acc +DA1.1 : 1 2 4 4 8 : 4 8 16 : 4 4 | |
5683 | acc +DA2.0 : 1 2 4 4 8 : 4 8 16 : 4 4 | |
5684 | acc +DA2.0W : 1 2 4 8 8 : 4 8 16 : 8 8 | |
5685 | gcc : 1 2 4 4 8 : 4 8 16 : 4 4 | |
5686 | ||
5687 | Each line is: | |
5688 | ||
5689 | compiler and options | |
5690 | char, short, int, long, long long | |
5691 | float, double, long double | |
5692 | char *, void (*)() | |
5693 | ||
5694 | So all these compilers use either ILP32 or LP64 model. | |
5695 | TODO: gcc has more options so it needs more investigation. | |
5696 | ||
a2379359 MC |
5697 | For floating point types, see: |
5698 | ||
5699 | http://docs.hp.com/hpux/pdf/B3906-90006.pdf | |
5700 | HP-UX floating-point guide, hpux 11.00 | |
5701 | ||
8e8b2dba MC |
5702 | -- chastain 2003-12-18 */ |
5703 | ||
e6e68f1f JB |
5704 | static struct gdbarch * |
5705 | hppa_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) | |
5706 | { | |
3ff7cf9e | 5707 | struct gdbarch_tdep *tdep; |
e6e68f1f | 5708 | struct gdbarch *gdbarch; |
59623e27 JB |
5709 | |
5710 | /* Try to determine the ABI of the object we are loading. */ | |
4be87837 | 5711 | if (info.abfd != NULL && info.osabi == GDB_OSABI_UNKNOWN) |
59623e27 | 5712 | { |
4be87837 DJ |
5713 | /* If it's a SOM file, assume it's HP/UX SOM. */ |
5714 | if (bfd_get_flavour (info.abfd) == bfd_target_som_flavour) | |
5715 | info.osabi = GDB_OSABI_HPUX_SOM; | |
59623e27 | 5716 | } |
e6e68f1f JB |
5717 | |
5718 | /* find a candidate among the list of pre-declared architectures. */ | |
5719 | arches = gdbarch_list_lookup_by_info (arches, &info); | |
5720 | if (arches != NULL) | |
5721 | return (arches->gdbarch); | |
5722 | ||
5723 | /* If none found, then allocate and initialize one. */ | |
3ff7cf9e JB |
5724 | tdep = XMALLOC (struct gdbarch_tdep); |
5725 | gdbarch = gdbarch_alloc (&info, tdep); | |
5726 | ||
5727 | /* Determine from the bfd_arch_info structure if we are dealing with | |
5728 | a 32 or 64 bits architecture. If the bfd_arch_info is not available, | |
5729 | then default to a 32bit machine. */ | |
5730 | if (info.bfd_arch_info != NULL) | |
5731 | tdep->bytes_per_address = | |
5732 | info.bfd_arch_info->bits_per_address / info.bfd_arch_info->bits_per_byte; | |
5733 | else | |
5734 | tdep->bytes_per_address = 4; | |
5735 | ||
5736 | /* Some parts of the gdbarch vector depend on whether we are running | |
5737 | on a 32 bits or 64 bits target. */ | |
5738 | switch (tdep->bytes_per_address) | |
5739 | { | |
5740 | case 4: | |
5741 | set_gdbarch_num_regs (gdbarch, hppa32_num_regs); | |
5742 | set_gdbarch_register_name (gdbarch, hppa32_register_name); | |
5743 | set_gdbarch_deprecated_register_virtual_type | |
5744 | (gdbarch, hppa32_register_virtual_type); | |
3ff7cf9e JB |
5745 | break; |
5746 | case 8: | |
5747 | set_gdbarch_num_regs (gdbarch, hppa64_num_regs); | |
5748 | set_gdbarch_register_name (gdbarch, hppa64_register_name); | |
5749 | set_gdbarch_deprecated_register_virtual_type | |
5750 | (gdbarch, hppa64_register_virtual_type); | |
3ff7cf9e JB |
5751 | break; |
5752 | default: | |
5753 | internal_error (__FILE__, __LINE__, "Unsupported address size: %d", | |
5754 | tdep->bytes_per_address); | |
5755 | } | |
5756 | ||
5757 | /* The following gdbarch vector elements depend on other parts of this | |
5758 | vector which have been set above, depending on the ABI. */ | |
5759 | set_gdbarch_deprecated_register_bytes | |
5760 | (gdbarch, gdbarch_num_regs (gdbarch) * tdep->bytes_per_address); | |
5761 | set_gdbarch_long_bit (gdbarch, tdep->bytes_per_address * TARGET_CHAR_BIT); | |
3ff7cf9e | 5762 | set_gdbarch_ptr_bit (gdbarch, tdep->bytes_per_address * TARGET_CHAR_BIT); |
e6e68f1f | 5763 | |
8e8b2dba MC |
5764 | /* The following gdbarch vector elements are the same in both ILP32 |
5765 | and LP64, but might show differences some day. */ | |
5766 | set_gdbarch_long_long_bit (gdbarch, 64); | |
5767 | set_gdbarch_long_double_bit (gdbarch, 128); | |
a2379359 | 5768 | set_gdbarch_long_double_format (gdbarch, &floatformat_ia64_quad_big); |
8e8b2dba | 5769 | |
3ff7cf9e JB |
5770 | /* The following gdbarch vector elements do not depend on the address |
5771 | size, or in any other gdbarch element previously set. */ | |
60383d10 JB |
5772 | set_gdbarch_skip_prologue (gdbarch, hppa_skip_prologue); |
5773 | set_gdbarch_skip_trampoline_code (gdbarch, hppa_skip_trampoline_code); | |
5774 | set_gdbarch_in_solib_call_trampoline (gdbarch, hppa_in_solib_call_trampoline); | |
5775 | set_gdbarch_in_solib_return_trampoline (gdbarch, | |
5776 | hppa_in_solib_return_trampoline); | |
60383d10 | 5777 | set_gdbarch_inner_than (gdbarch, hppa_inner_than); |
3ff7cf9e | 5778 | set_gdbarch_deprecated_register_size (gdbarch, tdep->bytes_per_address); |
0ba6dca9 | 5779 | set_gdbarch_deprecated_fp_regnum (gdbarch, 3); |
60383d10 JB |
5780 | set_gdbarch_sp_regnum (gdbarch, 30); |
5781 | set_gdbarch_fp0_regnum (gdbarch, 64); | |
5782 | set_gdbarch_pc_regnum (gdbarch, PCOQ_HEAD_REGNUM); | |
9c04cab7 | 5783 | set_gdbarch_deprecated_register_raw_size (gdbarch, hppa_register_raw_size); |
9c04cab7 AC |
5784 | set_gdbarch_deprecated_register_byte (gdbarch, hppa_register_byte); |
5785 | set_gdbarch_deprecated_register_virtual_size (gdbarch, hppa_register_raw_size); | |
3ff7cf9e | 5786 | set_gdbarch_deprecated_max_register_raw_size (gdbarch, tdep->bytes_per_address); |
a0ed5532 | 5787 | set_gdbarch_deprecated_max_register_virtual_size (gdbarch, 8); |
60383d10 | 5788 | set_gdbarch_cannot_store_register (gdbarch, hppa_cannot_store_register); |
b6fbdd1d | 5789 | set_gdbarch_addr_bits_remove (gdbarch, hppa_smash_text_address); |
60383d10 JB |
5790 | set_gdbarch_smash_text_address (gdbarch, hppa_smash_text_address); |
5791 | set_gdbarch_believe_pcc_promotion (gdbarch, 1); | |
5792 | set_gdbarch_read_pc (gdbarch, hppa_target_read_pc); | |
5793 | set_gdbarch_write_pc (gdbarch, hppa_target_write_pc); | |
0ba6dca9 | 5794 | set_gdbarch_deprecated_target_read_fp (gdbarch, hppa_target_read_fp); |
60383d10 | 5795 | |
143985b7 AF |
5796 | /* Helper for function argument information. */ |
5797 | set_gdbarch_fetch_pointer_argument (gdbarch, hppa_fetch_pointer_argument); | |
5798 | ||
36482093 AC |
5799 | set_gdbarch_print_insn (gdbarch, print_insn_hppa); |
5800 | ||
3a3bc038 AC |
5801 | /* When a hardware watchpoint triggers, we'll move the inferior past |
5802 | it by removing all eventpoints; stepping past the instruction | |
5803 | that caused the trigger; reinserting eventpoints; and checking | |
5804 | whether any watched location changed. */ | |
5805 | set_gdbarch_have_nonsteppable_watchpoint (gdbarch, 1); | |
5806 | ||
5979bc46 | 5807 | /* Inferior function call methods. */ |
fca7aa43 | 5808 | switch (tdep->bytes_per_address) |
5979bc46 | 5809 | { |
fca7aa43 AC |
5810 | case 4: |
5811 | set_gdbarch_push_dummy_call (gdbarch, hppa32_push_dummy_call); | |
5812 | set_gdbarch_frame_align (gdbarch, hppa32_frame_align); | |
5813 | break; | |
5814 | case 8: | |
5815 | if (0) | |
2f690297 | 5816 | { |
2f690297 | 5817 | set_gdbarch_push_dummy_call (gdbarch, hppa64_push_dummy_call); |
1797a8f6 | 5818 | set_gdbarch_frame_align (gdbarch, hppa64_frame_align); |
2f690297 AC |
5819 | break; |
5820 | } | |
fca7aa43 | 5821 | else |
e963316f | 5822 | { |
e963316f AC |
5823 | set_gdbarch_deprecated_call_dummy_breakpoint_offset (gdbarch, hppa64_call_dummy_breakpoint_offset); |
5824 | set_gdbarch_deprecated_call_dummy_length (gdbarch, hppa64_call_dummy_length); | |
5825 | set_gdbarch_deprecated_stack_align (gdbarch, hppa64_stack_align); | |
fad850b2 | 5826 | break; |
fca7aa43 AC |
5827 | set_gdbarch_deprecated_push_dummy_frame (gdbarch, hppa_push_dummy_frame); |
5828 | /* set_gdbarch_deprecated_fix_call_dummy (gdbarch, hppa_fix_call_dummy); */ | |
5829 | set_gdbarch_deprecated_push_arguments (gdbarch, hppa_push_arguments); | |
5830 | set_gdbarch_deprecated_use_generic_dummy_frames (gdbarch, 0); | |
5831 | set_gdbarch_deprecated_pc_in_call_dummy (gdbarch, deprecated_pc_in_call_dummy_on_stack); | |
5832 | set_gdbarch_call_dummy_location (gdbarch, ON_STACK); | |
fad850b2 | 5833 | } |
fca7aa43 | 5834 | break; |
fad850b2 AC |
5835 | } |
5836 | ||
5837 | /* Struct return methods. */ | |
fca7aa43 | 5838 | switch (tdep->bytes_per_address) |
fad850b2 | 5839 | { |
fca7aa43 AC |
5840 | case 4: |
5841 | set_gdbarch_return_value (gdbarch, hppa32_return_value); | |
5842 | break; | |
5843 | case 8: | |
5844 | if (0) | |
5845 | set_gdbarch_return_value (gdbarch, hppa64_return_value); | |
5846 | else | |
fad850b2 | 5847 | { |
e963316f AC |
5848 | set_gdbarch_deprecated_extract_return_value (gdbarch, hppa64_extract_return_value); |
5849 | set_gdbarch_use_struct_convention (gdbarch, hppa64_use_struct_convention); | |
5850 | set_gdbarch_deprecated_store_return_value (gdbarch, hppa64_store_return_value); | |
fca7aa43 | 5851 | set_gdbarch_deprecated_store_struct_return (gdbarch, hppa_store_struct_return); |
e963316f | 5852 | } |
fca7aa43 AC |
5853 | break; |
5854 | default: | |
5855 | internal_error (__FILE__, __LINE__, "bad switch"); | |
e963316f AC |
5856 | } |
5857 | ||
5979bc46 | 5858 | /* Frame unwind methods. */ |
412275d5 | 5859 | switch (tdep->bytes_per_address) |
e963316f | 5860 | { |
412275d5 | 5861 | case 4: |
26d08f08 AC |
5862 | set_gdbarch_unwind_dummy_id (gdbarch, hppa_unwind_dummy_id); |
5863 | set_gdbarch_unwind_pc (gdbarch, hppa_unwind_pc); | |
5864 | frame_unwind_append_sniffer (gdbarch, hppa_frame_unwind_sniffer); | |
5865 | frame_base_append_sniffer (gdbarch, hppa_frame_base_sniffer); | |
412275d5 AC |
5866 | break; |
5867 | case 8: | |
e963316f AC |
5868 | set_gdbarch_deprecated_saved_pc_after_call (gdbarch, hppa_saved_pc_after_call); |
5869 | set_gdbarch_deprecated_init_frame_pc (gdbarch, deprecated_init_frame_pc_default); | |
5870 | set_gdbarch_deprecated_frame_init_saved_regs (gdbarch, hppa_frame_init_saved_regs); | |
5871 | set_gdbarch_deprecated_init_extra_frame_info (gdbarch, hppa_init_extra_frame_info); | |
5872 | set_gdbarch_deprecated_frame_chain (gdbarch, hppa_frame_chain); | |
5873 | set_gdbarch_deprecated_frame_chain_valid (gdbarch, hppa_frame_chain_valid); | |
5874 | set_gdbarch_deprecated_frameless_function_invocation (gdbarch, hppa_frameless_function_invocation); | |
5875 | set_gdbarch_deprecated_frame_saved_pc (gdbarch, hppa_frame_saved_pc); | |
5876 | set_gdbarch_deprecated_pop_frame (gdbarch, hppa_pop_frame); | |
412275d5 AC |
5877 | break; |
5878 | default: | |
5879 | internal_error (__FILE__, __LINE__, "bad switch"); | |
e963316f | 5880 | } |
5979bc46 | 5881 | |
752d4ac1 JB |
5882 | /* Hook in ABI-specific overrides, if they have been registered. */ |
5883 | gdbarch_init_osabi (info, gdbarch); | |
5884 | ||
e6e68f1f JB |
5885 | return gdbarch; |
5886 | } | |
5887 | ||
5888 | static void | |
5889 | hppa_dump_tdep (struct gdbarch *current_gdbarch, struct ui_file *file) | |
5890 | { | |
5891 | /* Nothing to print for the moment. */ | |
5892 | } | |
5893 | ||
4facf7e8 JB |
5894 | void |
5895 | _initialize_hppa_tdep (void) | |
5896 | { | |
5897 | struct cmd_list_element *c; | |
5898 | void break_at_finish_command (char *arg, int from_tty); | |
5899 | void tbreak_at_finish_command (char *arg, int from_tty); | |
5900 | void break_at_finish_at_depth_command (char *arg, int from_tty); | |
5901 | ||
e6e68f1f | 5902 | gdbarch_register (bfd_arch_hppa, hppa_gdbarch_init, hppa_dump_tdep); |
4facf7e8 JB |
5903 | |
5904 | add_cmd ("unwind", class_maintenance, unwind_command, | |
5905 | "Print unwind table entry at given address.", | |
5906 | &maintenanceprintlist); | |
5907 | ||
5908 | deprecate_cmd (add_com ("xbreak", class_breakpoint, | |
5909 | break_at_finish_command, | |
5910 | concat ("Set breakpoint at procedure exit. \n\ | |
5911 | Argument may be function name, or \"*\" and an address.\n\ | |
5912 | If function is specified, break at end of code for that function.\n\ | |
5913 | If an address is specified, break at the end of the function that contains \n\ | |
5914 | that exact address.\n", | |
5915 | "With no arg, uses current execution address of selected stack frame.\n\ | |
5916 | This is useful for breaking on return to a stack frame.\n\ | |
5917 | \n\ | |
5918 | Multiple breakpoints at one place are permitted, and useful if conditional.\n\ | |
5919 | \n\ | |
5920 | Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL)), NULL); | |
5921 | deprecate_cmd (add_com_alias ("xb", "xbreak", class_breakpoint, 1), NULL); | |
5922 | deprecate_cmd (add_com_alias ("xbr", "xbreak", class_breakpoint, 1), NULL); | |
5923 | deprecate_cmd (add_com_alias ("xbre", "xbreak", class_breakpoint, 1), NULL); | |
5924 | deprecate_cmd (add_com_alias ("xbrea", "xbreak", class_breakpoint, 1), NULL); | |
5925 | ||
5926 | deprecate_cmd (c = add_com ("txbreak", class_breakpoint, | |
5927 | tbreak_at_finish_command, | |
5928 | "Set temporary breakpoint at procedure exit. Either there should\n\ | |
5929 | be no argument or the argument must be a depth.\n"), NULL); | |
5930 | set_cmd_completer (c, location_completer); | |
5931 | ||
5932 | if (xdb_commands) | |
5933 | deprecate_cmd (add_com ("bx", class_breakpoint, | |
5934 | break_at_finish_at_depth_command, | |
5935 | "Set breakpoint at procedure exit. Either there should\n\ | |
5936 | be no argument or the argument must be a depth.\n"), NULL); | |
5937 | } | |
5938 |