1 /* Target-dependent code for HP-UX on PA-RISC.
3 Copyright (C) 2002, 2003, 2004, 2005, 2007 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 #include "arch-utils.h"
25 #include "frame-unwind.h"
26 #include "trad-frame.h"
32 #include "hppa-tdep.h"
33 #include "solib-som.h"
34 #include "solib-pa64.h"
37 #include "exceptions.h"
39 #include "gdb_string.h"
41 #define IS_32BIT_TARGET(_gdbarch) \
42 ((gdbarch_tdep (_gdbarch))->bytes_per_address == 4)
44 /* Bit in the `ss_flag' member of `struct save_state' that indicates
45 that the 64-bit register values are live. From
46 <machine/save_state.h>. */
47 #define HPPA_HPUX_SS_WIDEREGS 0x40
49 /* Offsets of various parts of `struct save_state'. From
50 <machine/save_state.h>. */
51 #define HPPA_HPUX_SS_FLAGS_OFFSET 0
52 #define HPPA_HPUX_SS_NARROW_OFFSET 4
53 #define HPPA_HPUX_SS_FPBLOCK_OFFSET 256
54 #define HPPA_HPUX_SS_WIDE_OFFSET 640
56 /* The size of `struct save_state. */
57 #define HPPA_HPUX_SAVE_STATE_SIZE 1152
59 /* The size of `struct pa89_save_state', which corresponds to PA-RISC
60 1.1, the lowest common denominator that we support. */
61 #define HPPA_HPUX_PA89_SAVE_STATE_SIZE 512
64 /* Forward declarations. */
65 extern void _initialize_hppa_hpux_tdep (void);
66 extern initialize_file_ftype _initialize_hppa_hpux_tdep
;
69 in_opd_section (CORE_ADDR pc
)
71 struct obj_section
*s
;
74 s
= find_pc_section (pc
);
77 && s
->the_bfd_section
->name
!= NULL
78 && strcmp (s
->the_bfd_section
->name
, ".opd") == 0);
82 /* Return one if PC is in the call path of a trampoline, else return zero.
84 Note we return one for *any* call trampoline (long-call, arg-reloc), not
85 just shared library trampolines (import, export). */
88 hppa32_hpux_in_solib_call_trampoline (CORE_ADDR pc
, char *name
)
90 struct minimal_symbol
*minsym
;
91 struct unwind_table_entry
*u
;
93 /* First see if PC is in one of the two C-library trampolines. */
94 if (pc
== hppa_symbol_address("$$dyncall")
95 || pc
== hppa_symbol_address("_sr4export"))
98 minsym
= lookup_minimal_symbol_by_pc (pc
);
99 if (minsym
&& strcmp (DEPRECATED_SYMBOL_NAME (minsym
), ".stub") == 0)
102 /* Get the unwind descriptor corresponding to PC, return zero
103 if no unwind was found. */
104 u
= find_unwind_entry (pc
);
108 /* If this isn't a linker stub, then return now. */
109 if (u
->stub_unwind
.stub_type
== 0)
112 /* By definition a long-branch stub is a call stub. */
113 if (u
->stub_unwind
.stub_type
== LONG_BRANCH
)
116 /* The call and return path execute the same instructions within
117 an IMPORT stub! So an IMPORT stub is both a call and return
119 if (u
->stub_unwind
.stub_type
== IMPORT
)
122 /* Parameter relocation stubs always have a call path and may have a
124 if (u
->stub_unwind
.stub_type
== PARAMETER_RELOCATION
125 || u
->stub_unwind
.stub_type
== EXPORT
)
129 /* Search forward from the current PC until we hit a branch
130 or the end of the stub. */
131 for (addr
= pc
; addr
<= u
->region_end
; addr
+= 4)
135 insn
= read_memory_integer (addr
, 4);
137 /* Does it look like a bl? If so then it's the call path, if
138 we find a bv or be first, then we're on the return path. */
139 if ((insn
& 0xfc00e000) == 0xe8000000)
141 else if ((insn
& 0xfc00e001) == 0xe800c000
142 || (insn
& 0xfc000000) == 0xe0000000)
146 /* Should never happen. */
147 warning (_("Unable to find branch in parameter relocation stub."));
151 /* Unknown stub type. For now, just return zero. */
156 hppa64_hpux_in_solib_call_trampoline (CORE_ADDR pc
, char *name
)
158 /* PA64 has a completely different stub/trampoline scheme. Is it
159 better? Maybe. It's certainly harder to determine with any
160 certainty that we are in a stub because we can not refer to the
163 The heuristic is simple. Try to lookup the current PC value in th
164 minimal symbol table. If that fails, then assume we are not in a
167 Then see if the PC value falls within the section bounds for the
168 section containing the minimal symbol we found in the first
169 step. If it does, then assume we are not in a stub and return.
171 Finally peek at the instructions to see if they look like a stub. */
172 struct minimal_symbol
*minsym
;
177 minsym
= lookup_minimal_symbol_by_pc (pc
);
181 sec
= SYMBOL_BFD_SECTION (minsym
);
183 if (bfd_get_section_vma (sec
->owner
, sec
) <= pc
184 && pc
< (bfd_get_section_vma (sec
->owner
, sec
)
185 + bfd_section_size (sec
->owner
, sec
)))
188 /* We might be in a stub. Peek at the instructions. Stubs are 3
189 instructions long. */
190 insn
= read_memory_integer (pc
, 4);
192 /* Find out where we think we are within the stub. */
193 if ((insn
& 0xffffc00e) == 0x53610000)
195 else if ((insn
& 0xffffffff) == 0xe820d000)
197 else if ((insn
& 0xffffc00e) == 0x537b0000)
202 /* Now verify each insn in the range looks like a stub instruction. */
203 insn
= read_memory_integer (addr
, 4);
204 if ((insn
& 0xffffc00e) != 0x53610000)
207 /* Now verify each insn in the range looks like a stub instruction. */
208 insn
= read_memory_integer (addr
+ 4, 4);
209 if ((insn
& 0xffffffff) != 0xe820d000)
212 /* Now verify each insn in the range looks like a stub instruction. */
213 insn
= read_memory_integer (addr
+ 8, 4);
214 if ((insn
& 0xffffc00e) != 0x537b0000)
217 /* Looks like a stub. */
221 /* Return one if PC is in the return path of a trampoline, else return zero.
223 Note we return one for *any* call trampoline (long-call, arg-reloc), not
224 just shared library trampolines (import, export). */
227 hppa_hpux_in_solib_return_trampoline (CORE_ADDR pc
, char *name
)
229 struct unwind_table_entry
*u
;
231 /* Get the unwind descriptor corresponding to PC, return zero
232 if no unwind was found. */
233 u
= find_unwind_entry (pc
);
237 /* If this isn't a linker stub or it's just a long branch stub, then
239 if (u
->stub_unwind
.stub_type
== 0 || u
->stub_unwind
.stub_type
== LONG_BRANCH
)
242 /* The call and return path execute the same instructions within
243 an IMPORT stub! So an IMPORT stub is both a call and return
245 if (u
->stub_unwind
.stub_type
== IMPORT
)
248 /* Parameter relocation stubs always have a call path and may have a
250 if (u
->stub_unwind
.stub_type
== PARAMETER_RELOCATION
251 || u
->stub_unwind
.stub_type
== EXPORT
)
255 /* Search forward from the current PC until we hit a branch
256 or the end of the stub. */
257 for (addr
= pc
; addr
<= u
->region_end
; addr
+= 4)
261 insn
= read_memory_integer (addr
, 4);
263 /* Does it look like a bl? If so then it's the call path, if
264 we find a bv or be first, then we're on the return path. */
265 if ((insn
& 0xfc00e000) == 0xe8000000)
267 else if ((insn
& 0xfc00e001) == 0xe800c000
268 || (insn
& 0xfc000000) == 0xe0000000)
272 /* Should never happen. */
273 warning (_("Unable to find branch in parameter relocation stub."));
277 /* Unknown stub type. For now, just return zero. */
282 /* Figure out if PC is in a trampoline, and if so find out where
283 the trampoline will jump to. If not in a trampoline, return zero.
285 Simple code examination probably is not a good idea since the code
286 sequences in trampolines can also appear in user code.
288 We use unwinds and information from the minimal symbol table to
289 determine when we're in a trampoline. This won't work for ELF
290 (yet) since it doesn't create stub unwind entries. Whether or
291 not ELF will create stub unwinds or normal unwinds for linker
292 stubs is still being debated.
294 This should handle simple calls through dyncall or sr4export,
295 long calls, argument relocation stubs, and dyncall/sr4export
296 calling an argument relocation stub. It even handles some stubs
297 used in dynamic executables. */
300 hppa_hpux_skip_trampoline_code (struct frame_info
*frame
, CORE_ADDR pc
)
303 long prev_inst
, curr_inst
, loc
;
304 struct minimal_symbol
*msym
;
305 struct unwind_table_entry
*u
;
307 /* Addresses passed to dyncall may *NOT* be the actual address
308 of the function. So we may have to do something special. */
309 if (pc
== hppa_symbol_address("$$dyncall"))
311 pc
= (CORE_ADDR
) get_frame_register_unsigned (frame
, 22);
313 /* If bit 30 (counting from the left) is on, then pc is the address of
314 the PLT entry for this function, not the address of the function
315 itself. Bit 31 has meaning too, but only for MPE. */
317 pc
= (CORE_ADDR
) read_memory_integer
318 (pc
& ~0x3, gdbarch_ptr_bit (current_gdbarch
) / 8);
320 if (pc
== hppa_symbol_address("$$dyncall_external"))
322 pc
= (CORE_ADDR
) get_frame_register_unsigned (frame
, 22);
323 pc
= (CORE_ADDR
) read_memory_integer
324 (pc
& ~0x3, gdbarch_ptr_bit (current_gdbarch
) / 8);
326 else if (pc
== hppa_symbol_address("_sr4export"))
327 pc
= (CORE_ADDR
) get_frame_register_unsigned (frame
, 22);
329 /* Get the unwind descriptor corresponding to PC, return zero
330 if no unwind was found. */
331 u
= find_unwind_entry (pc
);
335 /* If this isn't a linker stub, then return now. */
336 /* elz: attention here! (FIXME) because of a compiler/linker
337 error, some stubs which should have a non zero stub_unwind.stub_type
338 have unfortunately a value of zero. So this function would return here
339 as if we were not in a trampoline. To fix this, we go look at the partial
340 symbol information, which reports this guy as a stub.
341 (FIXME): Unfortunately, we are not that lucky: it turns out that the
342 partial symbol information is also wrong sometimes. This is because
343 when it is entered (somread.c::som_symtab_read()) it can happen that
344 if the type of the symbol (from the som) is Entry, and the symbol is
345 in a shared library, then it can also be a trampoline. This would
346 be OK, except that I believe the way they decide if we are ina shared library
347 does not work. SOOOO..., even if we have a regular function w/o trampolines
348 its minimal symbol can be assigned type mst_solib_trampoline.
349 Also, if we find that the symbol is a real stub, then we fix the unwind
350 descriptor, and define the stub type to be EXPORT.
351 Hopefully this is correct most of the times. */
352 if (u
->stub_unwind
.stub_type
== 0)
355 /* elz: NOTE (FIXME!) once the problem with the unwind information is fixed
356 we can delete all the code which appears between the lines */
357 /*--------------------------------------------------------------------------*/
358 msym
= lookup_minimal_symbol_by_pc (pc
);
360 if (msym
== NULL
|| MSYMBOL_TYPE (msym
) != mst_solib_trampoline
)
361 return orig_pc
== pc
? 0 : pc
& ~0x3;
363 else if (msym
!= NULL
&& MSYMBOL_TYPE (msym
) == mst_solib_trampoline
)
365 struct objfile
*objfile
;
366 struct minimal_symbol
*msymbol
;
367 int function_found
= 0;
369 /* go look if there is another minimal symbol with the same name as
370 this one, but with type mst_text. This would happen if the msym
371 is an actual trampoline, in which case there would be another
372 symbol with the same name corresponding to the real function */
374 ALL_MSYMBOLS (objfile
, msymbol
)
376 if (MSYMBOL_TYPE (msymbol
) == mst_text
377 && DEPRECATED_STREQ (DEPRECATED_SYMBOL_NAME (msymbol
), DEPRECATED_SYMBOL_NAME (msym
)))
385 /* the type of msym is correct (mst_solib_trampoline), but
386 the unwind info is wrong, so set it to the correct value */
387 u
->stub_unwind
.stub_type
= EXPORT
;
389 /* the stub type info in the unwind is correct (this is not a
390 trampoline), but the msym type information is wrong, it
391 should be mst_text. So we need to fix the msym, and also
392 get out of this function */
394 MSYMBOL_TYPE (msym
) = mst_text
;
395 return orig_pc
== pc
? 0 : pc
& ~0x3;
399 /*--------------------------------------------------------------------------*/
402 /* It's a stub. Search for a branch and figure out where it goes.
403 Note we have to handle multi insn branch sequences like ldil;ble.
404 Most (all?) other branches can be determined by examining the contents
405 of certain registers and the stack. */
412 /* Make sure we haven't walked outside the range of this stub. */
413 if (u
!= find_unwind_entry (loc
))
415 warning (_("Unable to find branch in linker stub"));
416 return orig_pc
== pc
? 0 : pc
& ~0x3;
419 prev_inst
= curr_inst
;
420 curr_inst
= read_memory_integer (loc
, 4);
422 /* Does it look like a branch external using %r1? Then it's the
423 branch from the stub to the actual function. */
424 if ((curr_inst
& 0xffe0e000) == 0xe0202000)
426 /* Yup. See if the previous instruction loaded
427 a value into %r1. If so compute and return the jump address. */
428 if ((prev_inst
& 0xffe00000) == 0x20200000)
429 return (hppa_extract_21 (prev_inst
) + hppa_extract_17 (curr_inst
)) & ~0x3;
432 warning (_("Unable to find ldil X,%%r1 before ble Y(%%sr4,%%r1)."));
433 return orig_pc
== pc
? 0 : pc
& ~0x3;
437 /* Does it look like a be 0(sr0,%r21)? OR
438 Does it look like a be, n 0(sr0,%r21)? OR
439 Does it look like a bve (r21)? (this is on PA2.0)
440 Does it look like a bve, n(r21)? (this is also on PA2.0)
441 That's the branch from an
442 import stub to an export stub.
444 It is impossible to determine the target of the branch via
445 simple examination of instructions and/or data (consider
446 that the address in the plabel may be the address of the
447 bind-on-reference routine in the dynamic loader).
449 So we have try an alternative approach.
451 Get the name of the symbol at our current location; it should
452 be a stub symbol with the same name as the symbol in the
455 Then lookup a minimal symbol with the same name; we should
456 get the minimal symbol for the target routine in the shared
457 library as those take precedence of import/export stubs. */
458 if ((curr_inst
== 0xe2a00000) ||
459 (curr_inst
== 0xe2a00002) ||
460 (curr_inst
== 0xeaa0d000) ||
461 (curr_inst
== 0xeaa0d002))
463 struct minimal_symbol
*stubsym
, *libsym
;
465 stubsym
= lookup_minimal_symbol_by_pc (loc
);
468 warning (_("Unable to find symbol for 0x%lx"), loc
);
469 return orig_pc
== pc
? 0 : pc
& ~0x3;
472 libsym
= lookup_minimal_symbol (DEPRECATED_SYMBOL_NAME (stubsym
), NULL
, NULL
);
475 warning (_("Unable to find library symbol for %s."),
476 DEPRECATED_SYMBOL_NAME (stubsym
));
477 return orig_pc
== pc
? 0 : pc
& ~0x3;
480 return SYMBOL_VALUE (libsym
);
483 /* Does it look like bl X,%rp or bl X,%r0? Another way to do a
484 branch from the stub to the actual function. */
486 else if ((curr_inst
& 0xffe0e000) == 0xe8400000
487 || (curr_inst
& 0xffe0e000) == 0xe8000000
488 || (curr_inst
& 0xffe0e000) == 0xe800A000)
489 return (loc
+ hppa_extract_17 (curr_inst
) + 8) & ~0x3;
491 /* Does it look like bv (rp)? Note this depends on the
492 current stack pointer being the same as the stack
493 pointer in the stub itself! This is a branch on from the
494 stub back to the original caller. */
495 /*else if ((curr_inst & 0xffe0e000) == 0xe840c000) */
496 else if ((curr_inst
& 0xffe0f000) == 0xe840c000)
498 /* Yup. See if the previous instruction loaded
500 if (prev_inst
== 0x4bc23ff1)
503 sp
= get_frame_register_unsigned (frame
, HPPA_SP_REGNUM
);
504 return read_memory_integer (sp
- 8, 4) & ~0x3;
508 warning (_("Unable to find restore of %%rp before bv (%%rp)."));
509 return orig_pc
== pc
? 0 : pc
& ~0x3;
513 /* elz: added this case to capture the new instruction
514 at the end of the return part of an export stub used by
515 the PA2.0: BVE, n (rp) */
516 else if ((curr_inst
& 0xffe0f000) == 0xe840d000)
518 return (read_memory_integer
519 (get_frame_register_unsigned (frame
, HPPA_SP_REGNUM
) - 24,
520 gdbarch_ptr_bit (current_gdbarch
) / 8)) & ~0x3;
523 /* What about be,n 0(sr0,%rp)? It's just another way we return to
524 the original caller from the stub. Used in dynamic executables. */
525 else if (curr_inst
== 0xe0400002)
527 /* The value we jump to is sitting in sp - 24. But that's
528 loaded several instructions before the be instruction.
529 I guess we could check for the previous instruction being
530 mtsp %r1,%sr0 if we want to do sanity checking. */
531 return (read_memory_integer
532 (get_frame_register_unsigned (frame
, HPPA_SP_REGNUM
) - 24,
533 gdbarch_ptr_bit (current_gdbarch
) / 8)) & ~0x3;
536 /* Haven't found the branch yet, but we're still in the stub.
543 hppa_skip_permanent_breakpoint (struct regcache
*regcache
)
545 /* To step over a breakpoint instruction on the PA takes some
546 fiddling with the instruction address queue.
548 When we stop at a breakpoint, the IA queue front (the instruction
549 we're executing now) points at the breakpoint instruction, and
550 the IA queue back (the next instruction to execute) points to
551 whatever instruction we would execute after the breakpoint, if it
552 were an ordinary instruction. This is the case even if the
553 breakpoint is in the delay slot of a branch instruction.
555 Clearly, to step past the breakpoint, we need to set the queue
556 front to the back. But what do we put in the back? What
557 instruction comes after that one? Because of the branch delay
558 slot, the next insn is always at the back + 4. */
560 ULONGEST pcoq_tail
, pcsq_tail
;
561 regcache_cooked_read_unsigned (regcache
, HPPA_PCOQ_TAIL_REGNUM
, &pcoq_tail
);
562 regcache_cooked_read_unsigned (regcache
, HPPA_PCSQ_TAIL_REGNUM
, &pcsq_tail
);
564 regcache_cooked_write_unsigned (regcache
, HPPA_PCOQ_HEAD_REGNUM
, pcoq_tail
);
565 regcache_cooked_write_unsigned (regcache
, HPPA_PCSQ_HEAD_REGNUM
, pcsq_tail
);
567 regcache_cooked_write_unsigned (regcache
, HPPA_PCOQ_TAIL_REGNUM
, pcoq_tail
+ 4);
568 /* We can leave the tail's space the same, since there's no jump. */
573 struct hppa_hpux_sigtramp_unwind_cache
576 struct trad_frame_saved_reg
*saved_regs
;
579 static int hppa_hpux_tramp_reg
[] = {
581 HPPA_PCOQ_HEAD_REGNUM
,
582 HPPA_PCSQ_HEAD_REGNUM
,
583 HPPA_PCOQ_TAIL_REGNUM
,
584 HPPA_PCSQ_TAIL_REGNUM
,
611 static struct hppa_hpux_sigtramp_unwind_cache
*
612 hppa_hpux_sigtramp_frame_unwind_cache (struct frame_info
*next_frame
,
616 struct gdbarch
*gdbarch
= get_frame_arch (next_frame
);
617 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
618 struct hppa_hpux_sigtramp_unwind_cache
*info
;
620 CORE_ADDR sp
, scptr
, off
;
626 info
= FRAME_OBSTACK_ZALLOC (struct hppa_hpux_sigtramp_unwind_cache
);
628 info
->saved_regs
= trad_frame_alloc_saved_regs (next_frame
);
630 sp
= frame_unwind_register_unsigned (next_frame
, HPPA_SP_REGNUM
);
632 if (IS_32BIT_TARGET (gdbarch
))
639 /* See /usr/include/machine/save_state.h for the structure of the save_state_t
642 flag
= read_memory_unsigned_integer(scptr
+ HPPA_HPUX_SS_FLAGS_OFFSET
, 4);
644 if (!(flag
& HPPA_HPUX_SS_WIDEREGS
))
646 /* Narrow registers. */
647 off
= scptr
+ HPPA_HPUX_SS_NARROW_OFFSET
;
653 /* Wide registers. */
654 off
= scptr
+ HPPA_HPUX_SS_WIDE_OFFSET
+ 8;
656 szoff
= (tdep
->bytes_per_address
== 4 ? 4 : 0);
659 for (i
= 1; i
< 32; i
++)
661 info
->saved_regs
[HPPA_R0_REGNUM
+ i
].addr
= off
+ szoff
;
665 for (i
= 0; i
< ARRAY_SIZE (hppa_hpux_tramp_reg
); i
++)
667 if (hppa_hpux_tramp_reg
[i
] > 0)
668 info
->saved_regs
[hppa_hpux_tramp_reg
[i
]].addr
= off
+ szoff
;
675 info
->base
= frame_unwind_register_unsigned (next_frame
, HPPA_SP_REGNUM
);
681 hppa_hpux_sigtramp_frame_this_id (struct frame_info
*next_frame
,
682 void **this_prologue_cache
,
683 struct frame_id
*this_id
)
685 struct hppa_hpux_sigtramp_unwind_cache
*info
686 = hppa_hpux_sigtramp_frame_unwind_cache (next_frame
, this_prologue_cache
);
687 *this_id
= frame_id_build (info
->base
, frame_pc_unwind (next_frame
));
691 hppa_hpux_sigtramp_frame_prev_register (struct frame_info
*next_frame
,
692 void **this_prologue_cache
,
693 int regnum
, int *optimizedp
,
694 enum lval_type
*lvalp
,
696 int *realnump
, gdb_byte
*valuep
)
698 struct hppa_hpux_sigtramp_unwind_cache
*info
699 = hppa_hpux_sigtramp_frame_unwind_cache (next_frame
, this_prologue_cache
);
700 hppa_frame_prev_register_helper (next_frame
, info
->saved_regs
, regnum
,
701 optimizedp
, lvalp
, addrp
, realnump
, valuep
);
704 static const struct frame_unwind hppa_hpux_sigtramp_frame_unwind
= {
706 hppa_hpux_sigtramp_frame_this_id
,
707 hppa_hpux_sigtramp_frame_prev_register
710 static const struct frame_unwind
*
711 hppa_hpux_sigtramp_unwind_sniffer (struct frame_info
*next_frame
)
713 struct unwind_table_entry
*u
;
714 CORE_ADDR pc
= frame_pc_unwind (next_frame
);
716 u
= find_unwind_entry (pc
);
718 /* If this is an export stub, try to get the unwind descriptor for
719 the actual function itself. */
720 if (u
&& u
->stub_unwind
.stub_type
== EXPORT
)
722 gdb_byte buf
[HPPA_INSN_SIZE
];
725 if (!safe_frame_unwind_memory (next_frame
, u
->region_start
,
729 insn
= extract_unsigned_integer (buf
, sizeof buf
);
730 if ((insn
& 0xffe0e000) == 0xe8400000)
731 u
= find_unwind_entry(u
->region_start
+ hppa_extract_17 (insn
) + 8);
734 if (u
&& u
->HP_UX_interrupt_marker
)
735 return &hppa_hpux_sigtramp_frame_unwind
;
741 hppa32_hpux_find_global_pointer (struct value
*function
)
745 faddr
= value_as_address (function
);
747 /* Is this a plabel? If so, dereference it to get the gp value. */
755 status
= target_read_memory (faddr
+ 4, buf
, sizeof (buf
));
757 return extract_unsigned_integer (buf
, sizeof (buf
));
760 return gdbarch_tdep (current_gdbarch
)->solib_get_got_by_pc (faddr
);
764 hppa64_hpux_find_global_pointer (struct value
*function
)
769 faddr
= value_as_address (function
);
771 if (in_opd_section (faddr
))
773 target_read_memory (faddr
, buf
, sizeof (buf
));
774 return extract_unsigned_integer (&buf
[24], 8);
778 return gdbarch_tdep (current_gdbarch
)->solib_get_got_by_pc (faddr
);
782 static unsigned int ldsid_pattern
[] = {
783 0x000010a0, /* ldsid (rX),rY */
784 0x00001820, /* mtsp rY,sr0 */
785 0xe0000000 /* be,n (sr0,rX) */
789 hppa_hpux_search_pattern (CORE_ADDR start
, CORE_ADDR end
,
790 unsigned int *patterns
, int count
)
792 int num_insns
= (end
- start
+ HPPA_INSN_SIZE
) / HPPA_INSN_SIZE
;
797 buf
= alloca (num_insns
* HPPA_INSN_SIZE
);
798 insns
= alloca (num_insns
* sizeof (unsigned int));
800 read_memory (start
, buf
, num_insns
* HPPA_INSN_SIZE
);
801 for (i
= 0; i
< num_insns
; i
++, buf
+= HPPA_INSN_SIZE
)
802 insns
[i
] = extract_unsigned_integer (buf
, HPPA_INSN_SIZE
);
804 for (offset
= 0; offset
<= num_insns
- count
; offset
++)
806 for (i
= 0; i
< count
; i
++)
808 if ((insns
[offset
+ i
] & patterns
[i
]) != patterns
[i
])
815 if (offset
<= num_insns
- count
)
816 return start
+ offset
* HPPA_INSN_SIZE
;
822 hppa32_hpux_search_dummy_call_sequence (struct gdbarch
*gdbarch
, CORE_ADDR pc
,
826 struct obj_section
*sec
;
827 struct hppa_objfile_private
*priv
;
828 struct frame_info
*frame
;
829 struct unwind_table_entry
*u
;
834 sec
= find_pc_section (pc
);
836 priv
= objfile_data (obj
, hppa_objfile_priv_data
);
839 priv
= hppa_init_objfile_priv_data (obj
);
841 error (_("Internal error creating objfile private data."));
843 /* Use the cached value if we have one. */
844 if (priv
->dummy_call_sequence_addr
!= 0)
846 *argreg
= priv
->dummy_call_sequence_reg
;
847 return priv
->dummy_call_sequence_addr
;
850 /* First try a heuristic; if we are in a shared library call, our return
851 pointer is likely to point at an export stub. */
852 frame
= get_current_frame ();
853 rp
= frame_unwind_register_unsigned (frame
, 2);
854 u
= find_unwind_entry (rp
);
855 if (u
&& u
->stub_unwind
.stub_type
== EXPORT
)
857 addr
= hppa_hpux_search_pattern (u
->region_start
, u
->region_end
,
859 ARRAY_SIZE (ldsid_pattern
));
864 /* Next thing to try is to look for an export stub. */
865 if (priv
->unwind_info
)
869 for (i
= 0; i
< priv
->unwind_info
->last
; i
++)
871 struct unwind_table_entry
*u
;
872 u
= &priv
->unwind_info
->table
[i
];
873 if (u
->stub_unwind
.stub_type
== EXPORT
)
875 addr
= hppa_hpux_search_pattern (u
->region_start
, u
->region_end
,
877 ARRAY_SIZE (ldsid_pattern
));
886 /* Finally, if this is the main executable, try to locate a sequence
888 addr
= hppa_symbol_address ("noshlibs");
889 sec
= find_pc_section (addr
);
891 if (sec
&& sec
->objfile
== obj
)
893 CORE_ADDR start
, end
;
895 find_pc_partial_function (addr
, NULL
, &start
, &end
);
896 if (start
!= 0 && end
!= 0)
898 addr
= hppa_hpux_search_pattern (start
, end
, ldsid_pattern
,
899 ARRAY_SIZE (ldsid_pattern
));
905 /* Can't find a suitable sequence. */
909 target_read_memory (addr
, buf
, sizeof (buf
));
910 insn
= extract_unsigned_integer (buf
, sizeof (buf
));
911 priv
->dummy_call_sequence_addr
= addr
;
912 priv
->dummy_call_sequence_reg
= (insn
>> 21) & 0x1f;
914 *argreg
= priv
->dummy_call_sequence_reg
;
915 return priv
->dummy_call_sequence_addr
;
919 hppa64_hpux_search_dummy_call_sequence (struct gdbarch
*gdbarch
, CORE_ADDR pc
,
923 struct obj_section
*sec
;
924 struct hppa_objfile_private
*priv
;
926 struct minimal_symbol
*msym
;
929 sec
= find_pc_section (pc
);
931 priv
= objfile_data (obj
, hppa_objfile_priv_data
);
934 priv
= hppa_init_objfile_priv_data (obj
);
936 error (_("Internal error creating objfile private data."));
938 /* Use the cached value if we have one. */
939 if (priv
->dummy_call_sequence_addr
!= 0)
941 *argreg
= priv
->dummy_call_sequence_reg
;
942 return priv
->dummy_call_sequence_addr
;
945 /* FIXME: Without stub unwind information, locating a suitable sequence is
946 fairly difficult. For now, we implement a very naive and inefficient
947 scheme; try to read in blocks of code, and look for a "bve,n (rp)"
948 instruction. These are likely to occur at the end of functions, so
949 we only look at the last two instructions of each function. */
950 for (i
= 0, msym
= obj
->msymbols
; i
< obj
->minimal_symbol_count
; i
++, msym
++)
952 CORE_ADDR begin
, end
;
954 gdb_byte buf
[2 * HPPA_INSN_SIZE
];
957 find_pc_partial_function (SYMBOL_VALUE_ADDRESS (msym
), &name
,
960 if (name
== NULL
|| begin
== 0 || end
== 0)
963 if (target_read_memory (end
- sizeof (buf
), buf
, sizeof (buf
)) == 0)
965 for (offset
= 0; offset
< sizeof (buf
); offset
++)
969 insn
= extract_unsigned_integer (buf
+ offset
, HPPA_INSN_SIZE
);
970 if (insn
== 0xe840d002) /* bve,n (rp) */
972 addr
= (end
- sizeof (buf
)) + offset
;
979 /* Can't find a suitable sequence. */
983 priv
->dummy_call_sequence_addr
= addr
;
984 /* Right now we only look for a "bve,l (rp)" sequence, so the register is
985 always HPPA_RP_REGNUM. */
986 priv
->dummy_call_sequence_reg
= HPPA_RP_REGNUM
;
988 *argreg
= priv
->dummy_call_sequence_reg
;
989 return priv
->dummy_call_sequence_addr
;
993 hppa_hpux_find_import_stub_for_addr (CORE_ADDR funcaddr
)
995 struct objfile
*objfile
;
996 struct minimal_symbol
*funsym
, *stubsym
;
999 funsym
= lookup_minimal_symbol_by_pc (funcaddr
);
1002 ALL_OBJFILES (objfile
)
1004 stubsym
= lookup_minimal_symbol_solib_trampoline
1005 (SYMBOL_LINKAGE_NAME (funsym
), objfile
);
1009 struct unwind_table_entry
*u
;
1011 u
= find_unwind_entry (SYMBOL_VALUE (stubsym
));
1013 || (u
->stub_unwind
.stub_type
!= IMPORT
1014 && u
->stub_unwind
.stub_type
!= IMPORT_SHLIB
))
1017 stubaddr
= SYMBOL_VALUE (stubsym
);
1019 /* If we found an IMPORT stub, then we can stop searching;
1020 if we found an IMPORT_SHLIB, we want to continue the search
1021 in the hopes that we will find an IMPORT stub. */
1022 if (u
->stub_unwind
.stub_type
== IMPORT
)
1031 hppa_hpux_sr_for_addr (CORE_ADDR addr
)
1034 /* The space register to use is encoded in the top 2 bits of the address. */
1035 sr
= addr
>> (gdbarch_tdep (current_gdbarch
)->bytes_per_address
* 8 - 2);
1040 hppa_hpux_find_dummy_bpaddr (CORE_ADDR addr
)
1042 /* In order for us to restore the space register to its starting state,
1043 we need the dummy trampoline to return to the an instruction address in
1044 the same space as where we started the call. We used to place the
1045 breakpoint near the current pc, however, this breaks nested dummy calls
1046 as the nested call will hit the breakpoint address and terminate
1047 prematurely. Instead, we try to look for an address in the same space to
1050 This is similar in spirit to putting the breakpoint at the "entry point"
1051 of an executable. */
1053 struct obj_section
*sec
;
1054 struct unwind_table_entry
*u
;
1055 struct minimal_symbol
*msym
;
1059 sec
= find_pc_section (addr
);
1062 /* First try the lowest address in the section; we can use it as long
1063 as it is "regular" code (i.e. not a stub) */
1064 u
= find_unwind_entry (sec
->addr
);
1065 if (!u
|| u
->stub_unwind
.stub_type
== 0)
1068 /* Otherwise, we need to find a symbol for a regular function. We
1069 do this by walking the list of msymbols in the objfile. The symbol
1070 we find should not be the same as the function that was passed in. */
1072 /* FIXME: this is broken, because we can find a function that will be
1073 called by the dummy call target function, which will still not
1076 find_pc_partial_function (addr
, NULL
, &func
, NULL
);
1077 for (i
= 0, msym
= sec
->objfile
->msymbols
;
1078 i
< sec
->objfile
->minimal_symbol_count
;
1081 u
= find_unwind_entry (SYMBOL_VALUE_ADDRESS (msym
));
1082 if (func
!= SYMBOL_VALUE_ADDRESS (msym
)
1083 && (!u
|| u
->stub_unwind
.stub_type
== 0))
1084 return SYMBOL_VALUE_ADDRESS (msym
);
1088 warning (_("Cannot find suitable address to place dummy breakpoint; nested "
1089 "calls may fail."));
1094 hppa_hpux_push_dummy_code (struct gdbarch
*gdbarch
, CORE_ADDR sp
,
1095 CORE_ADDR funcaddr
, int using_gcc
,
1096 struct value
**args
, int nargs
,
1097 struct type
*value_type
,
1098 CORE_ADDR
*real_pc
, CORE_ADDR
*bp_addr
,
1099 struct regcache
*regcache
)
1101 CORE_ADDR pc
, stubaddr
;
1106 /* Note: we don't want to pass a function descriptor here; push_dummy_call
1107 fills in the PIC register for us. */
1108 funcaddr
= gdbarch_convert_from_func_ptr_addr (gdbarch
, funcaddr
, NULL
);
1110 /* The simple case is where we call a function in the same space that we are
1111 currently in; in that case we don't really need to do anything. */
1112 if (hppa_hpux_sr_for_addr (pc
) == hppa_hpux_sr_for_addr (funcaddr
))
1114 /* Intraspace call. */
1115 *bp_addr
= hppa_hpux_find_dummy_bpaddr (pc
);
1116 *real_pc
= funcaddr
;
1117 regcache_cooked_write_unsigned (regcache
, HPPA_RP_REGNUM
, *bp_addr
);
1122 /* In order to make an interspace call, we need to go through a stub.
1123 gcc supplies an appropriate stub called "__gcc_plt_call", however, if
1124 an application is compiled with HP compilers then this stub is not
1125 available. We used to fallback to "__d_plt_call", however that stub
1126 is not entirely useful for us because it doesn't do an interspace
1127 return back to the caller. Also, on hppa64-hpux, there is no
1128 __gcc_plt_call available. In order to keep the code uniform, we
1129 instead don't use either of these stubs, but instead write our own
1132 A problem arises since the stack is located in a different space than
1133 code, so in order to branch to a stack stub, we will need to do an
1134 interspace branch. Previous versions of gdb did this by modifying code
1135 at the current pc and doing single-stepping to set the pcsq. Since this
1136 is highly undesirable, we use a different scheme:
1138 All we really need to do the branch to the stub is a short instruction
1149 Instead of writing these sequences ourselves, we can find it in
1150 the instruction stream that belongs to the current space. While this
1151 seems difficult at first, we are actually guaranteed to find the sequences
1155 - in export stubs for shared libraries
1156 - in the "noshlibs" routine in the main module
1159 - at the end of each "regular" function
1161 We cache the address of these sequences in the objfile's private data
1162 since these operations can potentially be quite expensive.
1165 - write a stack trampoline
1166 - look for a suitable instruction sequence in the current space
1167 - point the sequence at the trampoline
1168 - set the return address of the trampoline to the current space
1169 (see hppa_hpux_find_dummy_call_bpaddr)
1170 - set the continuing address of the "dummy code" as the sequence.
1174 if (IS_32BIT_TARGET (gdbarch
))
1176 static unsigned int hppa32_tramp
[] = {
1177 0x0fdf1291, /* stw r31,-8(,sp) */
1178 0x02c010a1, /* ldsid (,r22),r1 */
1179 0x00011820, /* mtsp r1,sr0 */
1180 0xe6c00000, /* be,l 0(sr0,r22),%sr0,%r31 */
1181 0x081f0242, /* copy r31,rp */
1182 0x0fd11082, /* ldw -8(,sp),rp */
1183 0x004010a1, /* ldsid (,rp),r1 */
1184 0x00011820, /* mtsp r1,sr0 */
1185 0xe0400000, /* be 0(sr0,rp) */
1186 0x08000240 /* nop */
1189 /* for hppa32, we must call the function through a stub so that on
1190 return it can return to the space of our trampoline. */
1191 stubaddr
= hppa_hpux_find_import_stub_for_addr (funcaddr
);
1193 error (_("Cannot call external function not referenced by application "
1194 "(no import stub).\n"));
1195 regcache_cooked_write_unsigned (regcache
, 22, stubaddr
);
1197 write_memory (sp
, (char *)&hppa32_tramp
, sizeof (hppa32_tramp
));
1199 *bp_addr
= hppa_hpux_find_dummy_bpaddr (pc
);
1200 regcache_cooked_write_unsigned (regcache
, 31, *bp_addr
);
1202 *real_pc
= hppa32_hpux_search_dummy_call_sequence (gdbarch
, pc
, &argreg
);
1204 error (_("Cannot make interspace call from here."));
1206 regcache_cooked_write_unsigned (regcache
, argreg
, sp
);
1208 sp
+= sizeof (hppa32_tramp
);
1212 static unsigned int hppa64_tramp
[] = {
1213 0xeac0f000, /* bve,l (r22),%r2 */
1214 0x0fdf12d1, /* std r31,-8(,sp) */
1215 0x0fd110c2, /* ldd -8(,sp),rp */
1216 0xe840d002, /* bve,n (rp) */
1217 0x08000240 /* nop */
1220 /* for hppa64, we don't need to call through a stub; all functions
1221 return via a bve. */
1222 regcache_cooked_write_unsigned (regcache
, 22, funcaddr
);
1223 write_memory (sp
, (char *)&hppa64_tramp
, sizeof (hppa64_tramp
));
1226 regcache_cooked_write_unsigned (regcache
, 31, *bp_addr
);
1228 *real_pc
= hppa64_hpux_search_dummy_call_sequence (gdbarch
, pc
, &argreg
);
1230 error (_("Cannot make interspace call from here."));
1232 regcache_cooked_write_unsigned (regcache
, argreg
, sp
);
1234 sp
+= sizeof (hppa64_tramp
);
1237 sp
= gdbarch_frame_align (gdbarch
, sp
);
1245 hppa_hpux_supply_ss_narrow (struct regcache
*regcache
,
1246 int regnum
, const char *save_state
)
1248 const char *ss_narrow
= save_state
+ HPPA_HPUX_SS_NARROW_OFFSET
;
1251 for (i
= HPPA_R1_REGNUM
; i
< HPPA_FP0_REGNUM
; i
++)
1253 if (regnum
== i
|| regnum
== -1)
1254 regcache_raw_supply (regcache
, i
, ss_narrow
+ offset
);
1261 hppa_hpux_supply_ss_fpblock (struct regcache
*regcache
,
1262 int regnum
, const char *save_state
)
1264 const char *ss_fpblock
= save_state
+ HPPA_HPUX_SS_FPBLOCK_OFFSET
;
1267 /* FIXME: We view the floating-point state as 64 single-precision
1268 registers for 32-bit code, and 32 double-precision register for
1269 64-bit code. This distinction is artificial and should be
1270 eliminated. If that ever happens, we should remove the if-clause
1273 if (register_size (get_regcache_arch (regcache
), HPPA_FP0_REGNUM
) == 4)
1275 for (i
= HPPA_FP0_REGNUM
; i
< HPPA_FP0_REGNUM
+ 64; i
++)
1277 if (regnum
== i
|| regnum
== -1)
1278 regcache_raw_supply (regcache
, i
, ss_fpblock
+ offset
);
1285 for (i
= HPPA_FP0_REGNUM
; i
< HPPA_FP0_REGNUM
+ 32; i
++)
1287 if (regnum
== i
|| regnum
== -1)
1288 regcache_raw_supply (regcache
, i
, ss_fpblock
+ offset
);
1296 hppa_hpux_supply_ss_wide (struct regcache
*regcache
,
1297 int regnum
, const char *save_state
)
1299 const char *ss_wide
= save_state
+ HPPA_HPUX_SS_WIDE_OFFSET
;
1302 if (register_size (get_regcache_arch (regcache
), HPPA_R1_REGNUM
) == 4)
1305 for (i
= HPPA_R1_REGNUM
; i
< HPPA_FP0_REGNUM
; i
++)
1307 if (regnum
== i
|| regnum
== -1)
1308 regcache_raw_supply (regcache
, i
, ss_wide
+ offset
);
1315 hppa_hpux_supply_save_state (const struct regset
*regset
,
1316 struct regcache
*regcache
,
1317 int regnum
, const void *regs
, size_t len
)
1319 const char *proc_info
= regs
;
1320 const char *save_state
= proc_info
+ 8;
1323 flags
= extract_unsigned_integer (save_state
+ HPPA_HPUX_SS_FLAGS_OFFSET
, 4);
1324 if (regnum
== -1 || regnum
== HPPA_FLAGS_REGNUM
)
1326 struct gdbarch
*arch
= get_regcache_arch (regcache
);
1327 size_t size
= register_size (arch
, HPPA_FLAGS_REGNUM
);
1330 store_unsigned_integer (buf
, size
, flags
);
1331 regcache_raw_supply (regcache
, HPPA_FLAGS_REGNUM
, buf
);
1334 /* If the SS_WIDEREGS flag is set, we really do need the full
1335 `struct save_state'. */
1336 if (flags
& HPPA_HPUX_SS_WIDEREGS
&& len
< HPPA_HPUX_SAVE_STATE_SIZE
)
1337 error (_("Register set contents too small"));
1339 if (flags
& HPPA_HPUX_SS_WIDEREGS
)
1340 hppa_hpux_supply_ss_wide (regcache
, regnum
, save_state
);
1342 hppa_hpux_supply_ss_narrow (regcache
, regnum
, save_state
);
1344 hppa_hpux_supply_ss_fpblock (regcache
, regnum
, save_state
);
1347 /* HP-UX register set. */
1349 static struct regset hppa_hpux_regset
=
1352 hppa_hpux_supply_save_state
1355 static const struct regset
*
1356 hppa_hpux_regset_from_core_section (struct gdbarch
*gdbarch
,
1357 const char *sect_name
, size_t sect_size
)
1359 if (strcmp (sect_name
, ".reg") == 0
1360 && sect_size
>= HPPA_HPUX_PA89_SAVE_STATE_SIZE
+ 8)
1361 return &hppa_hpux_regset
;
1367 /* Bit in the `ss_flag' member of `struct save_state' that indicates
1368 the state was saved from a system call. From
1369 <machine/save_state.h>. */
1370 #define HPPA_HPUX_SS_INSYSCALL 0x02
1373 hppa_hpux_read_pc (struct regcache
*regcache
)
1377 /* If we're currently in a system call return the contents of %r31. */
1378 regcache_cooked_read_unsigned (regcache
, HPPA_FLAGS_REGNUM
, &flags
);
1379 if (flags
& HPPA_HPUX_SS_INSYSCALL
)
1382 regcache_cooked_read_unsigned (regcache
, HPPA_R31_REGNUM
, &pc
);
1386 return hppa_read_pc (regcache
);
1390 hppa_hpux_write_pc (struct regcache
*regcache
, CORE_ADDR pc
)
1394 /* If we're currently in a system call also write PC into %r31. */
1395 regcache_cooked_read_unsigned (regcache
, HPPA_FLAGS_REGNUM
, &flags
);
1396 if (flags
& HPPA_HPUX_SS_INSYSCALL
)
1397 regcache_cooked_write_unsigned (regcache
, HPPA_R31_REGNUM
, pc
| 0x3);
1399 return hppa_write_pc (regcache
, pc
);
1403 hppa_hpux_unwind_pc (struct gdbarch
*gdbarch
, struct frame_info
*next_frame
)
1407 /* If we're currently in a system call return the contents of %r31. */
1408 flags
= frame_unwind_register_unsigned (next_frame
, HPPA_FLAGS_REGNUM
);
1409 if (flags
& HPPA_HPUX_SS_INSYSCALL
)
1410 return frame_unwind_register_unsigned (next_frame
, HPPA_R31_REGNUM
) & ~0x3;
1412 return hppa_unwind_pc (gdbarch
, next_frame
);
1416 /* Given the current value of the pc, check to see if it is inside a stub, and
1417 if so, change the value of the pc to point to the caller of the stub.
1418 NEXT_FRAME is the next frame in the current list of frames.
1419 BASE contains to stack frame base of the current frame.
1420 SAVE_REGS is the register file stored in the frame cache. */
1422 hppa_hpux_unwind_adjust_stub (struct frame_info
*next_frame
, CORE_ADDR base
,
1423 struct trad_frame_saved_reg
*saved_regs
)
1425 int optimized
, realreg
;
1426 enum lval_type lval
;
1428 char buffer
[sizeof(ULONGEST
)];
1431 struct unwind_table_entry
*u
;
1433 trad_frame_get_prev_register (next_frame
, saved_regs
,
1434 HPPA_PCOQ_HEAD_REGNUM
,
1435 &optimized
, &lval
, &addr
, &realreg
, buffer
);
1436 val
= extract_unsigned_integer (buffer
,
1437 register_size (get_frame_arch (next_frame
),
1438 HPPA_PCOQ_HEAD_REGNUM
));
1440 u
= find_unwind_entry (val
);
1441 if (u
&& u
->stub_unwind
.stub_type
== EXPORT
)
1443 stubpc
= read_memory_integer
1444 (base
- 24, gdbarch_ptr_bit (current_gdbarch
) / 8);
1445 trad_frame_set_value (saved_regs
, HPPA_PCOQ_HEAD_REGNUM
, stubpc
);
1447 else if (hppa_symbol_address ("__gcc_plt_call")
1448 == get_pc_function_start (val
))
1450 stubpc
= read_memory_integer
1451 (base
- 8, gdbarch_ptr_bit (current_gdbarch
) / 8);
1452 trad_frame_set_value (saved_regs
, HPPA_PCOQ_HEAD_REGNUM
, stubpc
);
1457 hppa_hpux_init_abi (struct gdbarch_info info
, struct gdbarch
*gdbarch
)
1459 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
1461 if (IS_32BIT_TARGET (gdbarch
))
1462 tdep
->in_solib_call_trampoline
= hppa32_hpux_in_solib_call_trampoline
;
1464 tdep
->in_solib_call_trampoline
= hppa64_hpux_in_solib_call_trampoline
;
1466 tdep
->unwind_adjust_stub
= hppa_hpux_unwind_adjust_stub
;
1468 set_gdbarch_in_solib_return_trampoline
1469 (gdbarch
, hppa_hpux_in_solib_return_trampoline
);
1470 set_gdbarch_skip_trampoline_code (gdbarch
, hppa_hpux_skip_trampoline_code
);
1472 set_gdbarch_push_dummy_code (gdbarch
, hppa_hpux_push_dummy_code
);
1473 set_gdbarch_call_dummy_location (gdbarch
, ON_STACK
);
1475 set_gdbarch_read_pc (gdbarch
, hppa_hpux_read_pc
);
1476 set_gdbarch_write_pc (gdbarch
, hppa_hpux_write_pc
);
1477 set_gdbarch_unwind_pc (gdbarch
, hppa_hpux_unwind_pc
);
1478 set_gdbarch_skip_permanent_breakpoint
1479 (gdbarch
, hppa_skip_permanent_breakpoint
);
1481 set_gdbarch_regset_from_core_section
1482 (gdbarch
, hppa_hpux_regset_from_core_section
);
1484 frame_unwind_append_sniffer (gdbarch
, hppa_hpux_sigtramp_unwind_sniffer
);
1488 hppa_hpux_som_init_abi (struct gdbarch_info info
, struct gdbarch
*gdbarch
)
1490 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
1494 tdep
->find_global_pointer
= hppa32_hpux_find_global_pointer
;
1496 hppa_hpux_init_abi (info
, gdbarch
);
1497 som_solib_select (tdep
);
1501 hppa_hpux_elf_init_abi (struct gdbarch_info info
, struct gdbarch
*gdbarch
)
1503 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
1506 tdep
->find_global_pointer
= hppa64_hpux_find_global_pointer
;
1508 hppa_hpux_init_abi (info
, gdbarch
);
1509 pa64_solib_select (tdep
);
1512 static enum gdb_osabi
1513 hppa_hpux_core_osabi_sniffer (bfd
*abfd
)
1515 if (strcmp (bfd_get_target (abfd
), "hpux-core") == 0)
1516 return GDB_OSABI_HPUX_SOM
;
1517 else if (strcmp (bfd_get_target (abfd
), "elf64-hppa") == 0)
1521 section
= bfd_get_section_by_name (abfd
, ".kernel");
1527 size
= bfd_section_size (abfd
, section
);
1528 contents
= alloca (size
);
1529 if (bfd_get_section_contents (abfd
, section
, contents
,
1531 && strcmp (contents
, "HP-UX") == 0)
1532 return GDB_OSABI_HPUX_ELF
;
1536 return GDB_OSABI_UNKNOWN
;
1540 _initialize_hppa_hpux_tdep (void)
1542 /* BFD doesn't set a flavour for HP-UX style core files. It doesn't
1543 set the architecture either. */
1544 gdbarch_register_osabi_sniffer (bfd_arch_unknown
,
1545 bfd_target_unknown_flavour
,
1546 hppa_hpux_core_osabi_sniffer
);
1547 gdbarch_register_osabi_sniffer (bfd_arch_hppa
,
1548 bfd_target_elf_flavour
,
1549 hppa_hpux_core_osabi_sniffer
);
1551 gdbarch_register_osabi (bfd_arch_hppa
, 0, GDB_OSABI_HPUX_SOM
,
1552 hppa_hpux_som_init_abi
);
1553 gdbarch_register_osabi (bfd_arch_hppa
, bfd_mach_hppa20w
, GDB_OSABI_HPUX_ELF
,
1554 hppa_hpux_elf_init_abi
);