1 /* Target-dependent code for the HP PA architecture, for GDB.
3 Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
6 Contributed by the Center for Software Science at the
7 University of Utah (pa-gdb-bugs@cs.utah.edu).
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software
23 Foundation, Inc., 59 Temple Place - Suite 330,
24 Boston, MA 02111-1307, USA. */
32 #include "completer.h"
35 #include "gdb_assert.h"
36 #include "infttrace.h"
37 /* For argument passing to the inferior */
42 #include <sys/types.h>
46 #include <sys/param.h>
49 #include <sys/ptrace.h>
50 #include <machine/save_state.h>
52 #ifdef COFF_ENCAPSULATE
53 #include "a.out.encap.h"
57 /*#include <sys/user.h> After a.out.h */
68 /* Some local constants. */
69 static const int hppa_num_regs
= 128;
71 /* Get at various relevent fields of an instruction word. */
74 #define MASK_14 0x3fff
75 #define MASK_21 0x1fffff
77 /* Define offsets into the call dummy for the target function address.
78 See comments related to CALL_DUMMY for more info. */
79 #define FUNC_LDIL_OFFSET (INSTRUCTION_SIZE * 9)
80 #define FUNC_LDO_OFFSET (INSTRUCTION_SIZE * 10)
82 /* Define offsets into the call dummy for the _sr4export address.
83 See comments related to CALL_DUMMY for more info. */
84 #define SR4EXPORT_LDIL_OFFSET (INSTRUCTION_SIZE * 12)
85 #define SR4EXPORT_LDO_OFFSET (INSTRUCTION_SIZE * 13)
87 /* To support detection of the pseudo-initial frame
89 #define THREAD_INITIAL_FRAME_SYMBOL "__pthread_exit"
90 #define THREAD_INITIAL_FRAME_SYM_LEN sizeof(THREAD_INITIAL_FRAME_SYMBOL)
92 /* Sizes (in bytes) of the native unwind entries. */
93 #define UNWIND_ENTRY_SIZE 16
94 #define STUB_UNWIND_ENTRY_SIZE 8
96 static int get_field (unsigned word
, int from
, int to
);
98 static int extract_5_load (unsigned int);
100 static unsigned extract_5R_store (unsigned int);
102 static unsigned extract_5r_store (unsigned int);
104 static void find_dummy_frame_regs (struct frame_info
*, CORE_ADDR
*);
106 static int find_proc_framesize (CORE_ADDR
);
108 static int find_return_regnum (CORE_ADDR
);
110 struct unwind_table_entry
*find_unwind_entry (CORE_ADDR
);
112 static int extract_17 (unsigned int);
114 static unsigned deposit_21 (unsigned int, unsigned int);
116 static int extract_21 (unsigned);
118 static unsigned deposit_14 (int, unsigned int);
120 static int extract_14 (unsigned);
122 static void unwind_command (char *, int);
124 static int low_sign_extend (unsigned int, unsigned int);
126 static int sign_extend (unsigned int, unsigned int);
128 static int restore_pc_queue (CORE_ADDR
*);
130 static int hppa_alignof (struct type
*);
132 static int prologue_inst_adjust_sp (unsigned long);
134 static int is_branch (unsigned long);
136 static int inst_saves_gr (unsigned long);
138 static int inst_saves_fr (unsigned long);
140 static int pc_in_interrupt_handler (CORE_ADDR
);
142 static int pc_in_linker_stub (CORE_ADDR
);
144 static int compare_unwind_entries (const void *, const void *);
146 static void read_unwind_info (struct objfile
*);
148 static void internalize_unwinds (struct objfile
*,
149 struct unwind_table_entry
*,
150 asection
*, unsigned int,
151 unsigned int, CORE_ADDR
);
152 static void pa_print_registers (char *, int, int);
153 static void pa_strcat_registers (char *, int, int, struct ui_file
*);
154 static void pa_register_look_aside (char *, int, long *);
155 static void pa_print_fp_reg (int);
156 static void pa_strcat_fp_reg (int, struct ui_file
*, enum precision_type
);
157 static void record_text_segment_lowaddr (bfd
*, asection
*, void *);
158 /* FIXME: brobecker 2002-11-07: We will likely be able to make the
159 following functions static, once we hppa is partially multiarched. */
160 int hppa_reg_struct_has_addr (int gcc_p
, struct type
*type
);
161 CORE_ADDR
hppa_skip_prologue (CORE_ADDR pc
);
162 CORE_ADDR
hppa_skip_trampoline_code (CORE_ADDR pc
);
163 int hppa_in_solib_call_trampoline (CORE_ADDR pc
, char *name
);
164 int hppa_in_solib_return_trampoline (CORE_ADDR pc
, char *name
);
165 CORE_ADDR
hppa_saved_pc_after_call (struct frame_info
*frame
);
166 int hppa_inner_than (CORE_ADDR lhs
, CORE_ADDR rhs
);
167 CORE_ADDR
hppa_stack_align (CORE_ADDR sp
);
168 int hppa_pc_requires_run_before_use (CORE_ADDR pc
);
169 int hppa_instruction_nullified (void);
170 int hppa_register_raw_size (int reg_nr
);
171 int hppa_register_byte (int reg_nr
);
172 struct type
* hppa_register_virtual_type (int reg_nr
);
173 void hppa_store_struct_return (CORE_ADDR addr
, CORE_ADDR sp
);
174 void hppa_extract_return_value (struct type
*type
, char *regbuf
, char *valbuf
);
175 int hppa_use_struct_convention (int gcc_p
, struct type
*type
);
176 void hppa_store_return_value (struct type
*type
, char *valbuf
);
177 CORE_ADDR
hppa_extract_struct_value_address (char *regbuf
);
178 int hppa_cannot_store_register (int regnum
);
179 void hppa_init_extra_frame_info (int fromleaf
, struct frame_info
*frame
);
180 CORE_ADDR
hppa_frame_chain (struct frame_info
*frame
);
181 int hppa_frame_chain_valid (CORE_ADDR chain
, struct frame_info
*thisframe
);
182 int hppa_frameless_function_invocation (struct frame_info
*frame
);
183 CORE_ADDR
hppa_frame_saved_pc (struct frame_info
*frame
);
184 CORE_ADDR
hppa_frame_args_address (struct frame_info
*fi
);
185 CORE_ADDR
hppa_frame_locals_address (struct frame_info
*fi
);
186 int hppa_frame_num_args (struct frame_info
*frame
);
187 void hppa_push_dummy_frame (void);
188 void hppa_pop_frame (void);
189 CORE_ADDR
hppa_fix_call_dummy (char *dummy
, CORE_ADDR pc
, CORE_ADDR fun
,
190 int nargs
, struct value
**args
,
191 struct type
*type
, int gcc_p
);
192 CORE_ADDR
hppa_push_arguments (int nargs
, struct value
**args
, CORE_ADDR sp
,
193 int struct_return
, CORE_ADDR struct_addr
);
194 CORE_ADDR
hppa_smash_text_address (CORE_ADDR addr
);
195 CORE_ADDR
hppa_target_read_pc (ptid_t ptid
);
196 void hppa_target_write_pc (CORE_ADDR v
, ptid_t ptid
);
197 CORE_ADDR
hppa_target_read_fp (void);
201 struct minimal_symbol
*msym
;
202 CORE_ADDR solib_handle
;
203 CORE_ADDR return_val
;
207 static int cover_find_stub_with_shl_get (void *);
209 static int is_pa_2
= 0; /* False */
211 /* This is declared in symtab.c; set to 1 in hp-symtab-read.c */
212 extern int hp_som_som_object_present
;
214 /* In breakpoint.c */
215 extern int exception_catchpoints_are_fragile
;
217 /* Should call_function allocate stack space for a struct return? */
220 hppa_use_struct_convention (int gcc_p
, struct type
*type
)
222 return (TYPE_LENGTH (type
) > 2 * DEPRECATED_REGISTER_SIZE
);
226 /* Routines to extract various sized constants out of hppa
229 /* This assumes that no garbage lies outside of the lower bits of
233 sign_extend (unsigned val
, unsigned bits
)
235 return (int) (val
>> (bits
- 1) ? (-1 << bits
) | val
: val
);
238 /* For many immediate values the sign bit is the low bit! */
241 low_sign_extend (unsigned val
, unsigned bits
)
243 return (int) ((val
& 0x1 ? (-1 << (bits
- 1)) : 0) | val
>> 1);
246 /* Extract the bits at positions between FROM and TO, using HP's numbering
250 get_field (unsigned word
, int from
, int to
)
252 return ((word
) >> (31 - (to
)) & ((1 << ((to
) - (from
) + 1)) - 1));
255 /* extract the immediate field from a ld{bhw}s instruction */
258 extract_5_load (unsigned word
)
260 return low_sign_extend (word
>> 16 & MASK_5
, 5);
263 /* extract the immediate field from a break instruction */
266 extract_5r_store (unsigned word
)
268 return (word
& MASK_5
);
271 /* extract the immediate field from a {sr}sm instruction */
274 extract_5R_store (unsigned word
)
276 return (word
>> 16 & MASK_5
);
279 /* extract a 14 bit immediate field */
282 extract_14 (unsigned word
)
284 return low_sign_extend (word
& MASK_14
, 14);
287 /* deposit a 14 bit constant in a word */
290 deposit_14 (int opnd
, unsigned word
)
292 unsigned sign
= (opnd
< 0 ? 1 : 0);
294 return word
| ((unsigned) opnd
<< 1 & MASK_14
) | sign
;
297 /* extract a 21 bit constant */
300 extract_21 (unsigned word
)
306 val
= get_field (word
, 20, 20);
308 val
|= get_field (word
, 9, 19);
310 val
|= get_field (word
, 5, 6);
312 val
|= get_field (word
, 0, 4);
314 val
|= get_field (word
, 7, 8);
315 return sign_extend (val
, 21) << 11;
318 /* deposit a 21 bit constant in a word. Although 21 bit constants are
319 usually the top 21 bits of a 32 bit constant, we assume that only
320 the low 21 bits of opnd are relevant */
323 deposit_21 (unsigned opnd
, unsigned word
)
327 val
|= get_field (opnd
, 11 + 14, 11 + 18);
329 val
|= get_field (opnd
, 11 + 12, 11 + 13);
331 val
|= get_field (opnd
, 11 + 19, 11 + 20);
333 val
|= get_field (opnd
, 11 + 1, 11 + 11);
335 val
|= get_field (opnd
, 11 + 0, 11 + 0);
339 /* extract a 17 bit constant from branch instructions, returning the
340 19 bit signed value. */
343 extract_17 (unsigned word
)
345 return sign_extend (get_field (word
, 19, 28) |
346 get_field (word
, 29, 29) << 10 |
347 get_field (word
, 11, 15) << 11 |
348 (word
& 0x1) << 16, 17) << 2;
352 /* Compare the start address for two unwind entries returning 1 if
353 the first address is larger than the second, -1 if the second is
354 larger than the first, and zero if they are equal. */
357 compare_unwind_entries (const void *arg1
, const void *arg2
)
359 const struct unwind_table_entry
*a
= arg1
;
360 const struct unwind_table_entry
*b
= arg2
;
362 if (a
->region_start
> b
->region_start
)
364 else if (a
->region_start
< b
->region_start
)
370 static CORE_ADDR low_text_segment_address
;
373 record_text_segment_lowaddr (bfd
*abfd
, asection
*section
, void *ignored
)
375 if (((section
->flags
& (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
))
376 == (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
))
377 && section
->vma
< low_text_segment_address
)
378 low_text_segment_address
= section
->vma
;
382 internalize_unwinds (struct objfile
*objfile
, struct unwind_table_entry
*table
,
383 asection
*section
, unsigned int entries
, unsigned int size
,
384 CORE_ADDR text_offset
)
386 /* We will read the unwind entries into temporary memory, then
387 fill in the actual unwind table. */
392 char *buf
= alloca (size
);
394 low_text_segment_address
= -1;
396 /* If addresses are 64 bits wide, then unwinds are supposed to
397 be segment relative offsets instead of absolute addresses.
399 Note that when loading a shared library (text_offset != 0) the
400 unwinds are already relative to the text_offset that will be
402 if (TARGET_PTR_BIT
== 64 && text_offset
== 0)
404 bfd_map_over_sections (objfile
->obfd
,
405 record_text_segment_lowaddr
, NULL
);
407 /* ?!? Mask off some low bits. Should this instead subtract
408 out the lowest section's filepos or something like that?
409 This looks very hokey to me. */
410 low_text_segment_address
&= ~0xfff;
411 text_offset
+= low_text_segment_address
;
414 bfd_get_section_contents (objfile
->obfd
, section
, buf
, 0, size
);
416 /* Now internalize the information being careful to handle host/target
418 for (i
= 0; i
< entries
; i
++)
420 table
[i
].region_start
= bfd_get_32 (objfile
->obfd
,
422 table
[i
].region_start
+= text_offset
;
424 table
[i
].region_end
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) buf
);
425 table
[i
].region_end
+= text_offset
;
427 tmp
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) buf
);
429 table
[i
].Cannot_unwind
= (tmp
>> 31) & 0x1;
430 table
[i
].Millicode
= (tmp
>> 30) & 0x1;
431 table
[i
].Millicode_save_sr0
= (tmp
>> 29) & 0x1;
432 table
[i
].Region_description
= (tmp
>> 27) & 0x3;
433 table
[i
].reserved1
= (tmp
>> 26) & 0x1;
434 table
[i
].Entry_SR
= (tmp
>> 25) & 0x1;
435 table
[i
].Entry_FR
= (tmp
>> 21) & 0xf;
436 table
[i
].Entry_GR
= (tmp
>> 16) & 0x1f;
437 table
[i
].Args_stored
= (tmp
>> 15) & 0x1;
438 table
[i
].Variable_Frame
= (tmp
>> 14) & 0x1;
439 table
[i
].Separate_Package_Body
= (tmp
>> 13) & 0x1;
440 table
[i
].Frame_Extension_Millicode
= (tmp
>> 12) & 0x1;
441 table
[i
].Stack_Overflow_Check
= (tmp
>> 11) & 0x1;
442 table
[i
].Two_Instruction_SP_Increment
= (tmp
>> 10) & 0x1;
443 table
[i
].Ada_Region
= (tmp
>> 9) & 0x1;
444 table
[i
].cxx_info
= (tmp
>> 8) & 0x1;
445 table
[i
].cxx_try_catch
= (tmp
>> 7) & 0x1;
446 table
[i
].sched_entry_seq
= (tmp
>> 6) & 0x1;
447 table
[i
].reserved2
= (tmp
>> 5) & 0x1;
448 table
[i
].Save_SP
= (tmp
>> 4) & 0x1;
449 table
[i
].Save_RP
= (tmp
>> 3) & 0x1;
450 table
[i
].Save_MRP_in_frame
= (tmp
>> 2) & 0x1;
451 table
[i
].extn_ptr_defined
= (tmp
>> 1) & 0x1;
452 table
[i
].Cleanup_defined
= tmp
& 0x1;
453 tmp
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) buf
);
455 table
[i
].MPE_XL_interrupt_marker
= (tmp
>> 31) & 0x1;
456 table
[i
].HP_UX_interrupt_marker
= (tmp
>> 30) & 0x1;
457 table
[i
].Large_frame
= (tmp
>> 29) & 0x1;
458 table
[i
].Pseudo_SP_Set
= (tmp
>> 28) & 0x1;
459 table
[i
].reserved4
= (tmp
>> 27) & 0x1;
460 table
[i
].Total_frame_size
= tmp
& 0x7ffffff;
462 /* Stub unwinds are handled elsewhere. */
463 table
[i
].stub_unwind
.stub_type
= 0;
464 table
[i
].stub_unwind
.padding
= 0;
469 /* Read in the backtrace information stored in the `$UNWIND_START$' section of
470 the object file. This info is used mainly by find_unwind_entry() to find
471 out the stack frame size and frame pointer used by procedures. We put
472 everything on the psymbol obstack in the objfile so that it automatically
473 gets freed when the objfile is destroyed. */
476 read_unwind_info (struct objfile
*objfile
)
478 asection
*unwind_sec
, *stub_unwind_sec
;
479 unsigned unwind_size
, stub_unwind_size
, total_size
;
480 unsigned index
, unwind_entries
;
481 unsigned stub_entries
, total_entries
;
482 CORE_ADDR text_offset
;
483 struct obj_unwind_info
*ui
;
484 obj_private_data_t
*obj_private
;
486 text_offset
= ANOFFSET (objfile
->section_offsets
, 0);
487 ui
= (struct obj_unwind_info
*) obstack_alloc (&objfile
->psymbol_obstack
,
488 sizeof (struct obj_unwind_info
));
494 /* For reasons unknown the HP PA64 tools generate multiple unwinder
495 sections in a single executable. So we just iterate over every
496 section in the BFD looking for unwinder sections intead of trying
497 to do a lookup with bfd_get_section_by_name.
499 First determine the total size of the unwind tables so that we
500 can allocate memory in a nice big hunk. */
502 for (unwind_sec
= objfile
->obfd
->sections
;
504 unwind_sec
= unwind_sec
->next
)
506 if (strcmp (unwind_sec
->name
, "$UNWIND_START$") == 0
507 || strcmp (unwind_sec
->name
, ".PARISC.unwind") == 0)
509 unwind_size
= bfd_section_size (objfile
->obfd
, unwind_sec
);
510 unwind_entries
= unwind_size
/ UNWIND_ENTRY_SIZE
;
512 total_entries
+= unwind_entries
;
516 /* Now compute the size of the stub unwinds. Note the ELF tools do not
517 use stub unwinds at the curren time. */
518 stub_unwind_sec
= bfd_get_section_by_name (objfile
->obfd
, "$UNWIND_END$");
522 stub_unwind_size
= bfd_section_size (objfile
->obfd
, stub_unwind_sec
);
523 stub_entries
= stub_unwind_size
/ STUB_UNWIND_ENTRY_SIZE
;
527 stub_unwind_size
= 0;
531 /* Compute total number of unwind entries and their total size. */
532 total_entries
+= stub_entries
;
533 total_size
= total_entries
* sizeof (struct unwind_table_entry
);
535 /* Allocate memory for the unwind table. */
536 ui
->table
= (struct unwind_table_entry
*)
537 obstack_alloc (&objfile
->psymbol_obstack
, total_size
);
538 ui
->last
= total_entries
- 1;
540 /* Now read in each unwind section and internalize the standard unwind
543 for (unwind_sec
= objfile
->obfd
->sections
;
545 unwind_sec
= unwind_sec
->next
)
547 if (strcmp (unwind_sec
->name
, "$UNWIND_START$") == 0
548 || strcmp (unwind_sec
->name
, ".PARISC.unwind") == 0)
550 unwind_size
= bfd_section_size (objfile
->obfd
, unwind_sec
);
551 unwind_entries
= unwind_size
/ UNWIND_ENTRY_SIZE
;
553 internalize_unwinds (objfile
, &ui
->table
[index
], unwind_sec
,
554 unwind_entries
, unwind_size
, text_offset
);
555 index
+= unwind_entries
;
559 /* Now read in and internalize the stub unwind entries. */
560 if (stub_unwind_size
> 0)
563 char *buf
= alloca (stub_unwind_size
);
565 /* Read in the stub unwind entries. */
566 bfd_get_section_contents (objfile
->obfd
, stub_unwind_sec
, buf
,
567 0, stub_unwind_size
);
569 /* Now convert them into regular unwind entries. */
570 for (i
= 0; i
< stub_entries
; i
++, index
++)
572 /* Clear out the next unwind entry. */
573 memset (&ui
->table
[index
], 0, sizeof (struct unwind_table_entry
));
575 /* Convert offset & size into region_start and region_end.
576 Stuff away the stub type into "reserved" fields. */
577 ui
->table
[index
].region_start
= bfd_get_32 (objfile
->obfd
,
579 ui
->table
[index
].region_start
+= text_offset
;
581 ui
->table
[index
].stub_unwind
.stub_type
= bfd_get_8 (objfile
->obfd
,
584 ui
->table
[index
].region_end
585 = ui
->table
[index
].region_start
+ 4 *
586 (bfd_get_16 (objfile
->obfd
, (bfd_byte
*) buf
) - 1);
592 /* Unwind table needs to be kept sorted. */
593 qsort (ui
->table
, total_entries
, sizeof (struct unwind_table_entry
),
594 compare_unwind_entries
);
596 /* Keep a pointer to the unwind information. */
597 if (objfile
->obj_private
== NULL
)
599 obj_private
= (obj_private_data_t
*)
600 obstack_alloc (&objfile
->psymbol_obstack
,
601 sizeof (obj_private_data_t
));
602 obj_private
->unwind_info
= NULL
;
603 obj_private
->so_info
= NULL
;
606 objfile
->obj_private
= obj_private
;
608 obj_private
= (obj_private_data_t
*) objfile
->obj_private
;
609 obj_private
->unwind_info
= ui
;
612 /* Lookup the unwind (stack backtrace) info for the given PC. We search all
613 of the objfiles seeking the unwind table entry for this PC. Each objfile
614 contains a sorted list of struct unwind_table_entry. Since we do a binary
615 search of the unwind tables, we depend upon them to be sorted. */
617 struct unwind_table_entry
*
618 find_unwind_entry (CORE_ADDR pc
)
620 int first
, middle
, last
;
621 struct objfile
*objfile
;
623 /* A function at address 0? Not in HP-UX! */
624 if (pc
== (CORE_ADDR
) 0)
627 ALL_OBJFILES (objfile
)
629 struct obj_unwind_info
*ui
;
631 if (objfile
->obj_private
)
632 ui
= ((obj_private_data_t
*) (objfile
->obj_private
))->unwind_info
;
636 read_unwind_info (objfile
);
637 if (objfile
->obj_private
== NULL
)
638 error ("Internal error reading unwind information.");
639 ui
= ((obj_private_data_t
*) (objfile
->obj_private
))->unwind_info
;
642 /* First, check the cache */
645 && pc
>= ui
->cache
->region_start
646 && pc
<= ui
->cache
->region_end
)
649 /* Not in the cache, do a binary search */
654 while (first
<= last
)
656 middle
= (first
+ last
) / 2;
657 if (pc
>= ui
->table
[middle
].region_start
658 && pc
<= ui
->table
[middle
].region_end
)
660 ui
->cache
= &ui
->table
[middle
];
661 return &ui
->table
[middle
];
664 if (pc
< ui
->table
[middle
].region_start
)
669 } /* ALL_OBJFILES() */
673 const unsigned char *
674 hppa_breakpoint_from_pc (CORE_ADDR
*pc
, int *len
)
676 static const char breakpoint
[] = {0x00, 0x01, 0x00, 0x04};
677 (*len
) = sizeof (breakpoint
);
681 /* Return the adjustment necessary to make for addresses on the stack
682 as presented by hpread.c.
684 This is necessary because of the stack direction on the PA and the
685 bizarre way in which someone (?) decided they wanted to handle
686 frame pointerless code in GDB. */
688 hpread_adjust_stack_address (CORE_ADDR func_addr
)
690 struct unwind_table_entry
*u
;
692 u
= find_unwind_entry (func_addr
);
696 return u
->Total_frame_size
<< 3;
699 /* Called to determine if PC is in an interrupt handler of some
703 pc_in_interrupt_handler (CORE_ADDR pc
)
705 struct unwind_table_entry
*u
;
706 struct minimal_symbol
*msym_us
;
708 u
= find_unwind_entry (pc
);
712 /* Oh joys. HPUX sets the interrupt bit for _sigreturn even though
713 its frame isn't a pure interrupt frame. Deal with this. */
714 msym_us
= lookup_minimal_symbol_by_pc (pc
);
716 return (u
->HP_UX_interrupt_marker
717 && !PC_IN_SIGTRAMP (pc
, DEPRECATED_SYMBOL_NAME (msym_us
)));
720 /* Called when no unwind descriptor was found for PC. Returns 1 if it
721 appears that PC is in a linker stub.
723 ?!? Need to handle stubs which appear in PA64 code. */
726 pc_in_linker_stub (CORE_ADDR pc
)
728 int found_magic_instruction
= 0;
732 /* If unable to read memory, assume pc is not in a linker stub. */
733 if (target_read_memory (pc
, buf
, 4) != 0)
736 /* We are looking for something like
738 ; $$dyncall jams RP into this special spot in the frame (RP')
739 ; before calling the "call stub"
742 ldsid (rp),r1 ; Get space associated with RP into r1
743 mtsp r1,sp ; Move it into space register 0
744 be,n 0(sr0),rp) ; back to your regularly scheduled program */
746 /* Maximum known linker stub size is 4 instructions. Search forward
747 from the given PC, then backward. */
748 for (i
= 0; i
< 4; i
++)
750 /* If we hit something with an unwind, stop searching this direction. */
752 if (find_unwind_entry (pc
+ i
* 4) != 0)
755 /* Check for ldsid (rp),r1 which is the magic instruction for a
756 return from a cross-space function call. */
757 if (read_memory_integer (pc
+ i
* 4, 4) == 0x004010a1)
759 found_magic_instruction
= 1;
762 /* Add code to handle long call/branch and argument relocation stubs
766 if (found_magic_instruction
!= 0)
769 /* Now look backward. */
770 for (i
= 0; i
< 4; i
++)
772 /* If we hit something with an unwind, stop searching this direction. */
774 if (find_unwind_entry (pc
- i
* 4) != 0)
777 /* Check for ldsid (rp),r1 which is the magic instruction for a
778 return from a cross-space function call. */
779 if (read_memory_integer (pc
- i
* 4, 4) == 0x004010a1)
781 found_magic_instruction
= 1;
784 /* Add code to handle long call/branch and argument relocation stubs
787 return found_magic_instruction
;
791 find_return_regnum (CORE_ADDR pc
)
793 struct unwind_table_entry
*u
;
795 u
= find_unwind_entry (pc
);
806 /* Return size of frame, or -1 if we should use a frame pointer. */
808 find_proc_framesize (CORE_ADDR pc
)
810 struct unwind_table_entry
*u
;
811 struct minimal_symbol
*msym_us
;
813 /* This may indicate a bug in our callers... */
814 if (pc
== (CORE_ADDR
) 0)
817 u
= find_unwind_entry (pc
);
821 if (pc_in_linker_stub (pc
))
822 /* Linker stubs have a zero size frame. */
828 msym_us
= lookup_minimal_symbol_by_pc (pc
);
830 /* If Save_SP is set, and we're not in an interrupt or signal caller,
831 then we have a frame pointer. Use it. */
833 && !pc_in_interrupt_handler (pc
)
835 && !PC_IN_SIGTRAMP (pc
, DEPRECATED_SYMBOL_NAME (msym_us
)))
838 return u
->Total_frame_size
<< 3;
841 /* Return offset from sp at which rp is saved, or 0 if not saved. */
842 static int rp_saved (CORE_ADDR
);
845 rp_saved (CORE_ADDR pc
)
847 struct unwind_table_entry
*u
;
849 /* A function at, and thus a return PC from, address 0? Not in HP-UX! */
850 if (pc
== (CORE_ADDR
) 0)
853 u
= find_unwind_entry (pc
);
857 if (pc_in_linker_stub (pc
))
858 /* This is the so-called RP'. */
865 return (TARGET_PTR_BIT
== 64 ? -16 : -20);
866 else if (u
->stub_unwind
.stub_type
!= 0)
868 switch (u
->stub_unwind
.stub_type
)
873 case PARAMETER_RELOCATION
:
884 hppa_frameless_function_invocation (struct frame_info
*frame
)
886 struct unwind_table_entry
*u
;
888 u
= find_unwind_entry (get_frame_pc (frame
));
893 return (u
->Total_frame_size
== 0 && u
->stub_unwind
.stub_type
== 0);
896 /* Immediately after a function call, return the saved pc.
897 Can't go through the frames for this because on some machines
898 the new frame is not set up until the new function executes
899 some instructions. */
902 hppa_saved_pc_after_call (struct frame_info
*frame
)
906 struct unwind_table_entry
*u
;
908 ret_regnum
= find_return_regnum (get_frame_pc (frame
));
909 pc
= read_register (ret_regnum
) & ~0x3;
911 /* If PC is in a linker stub, then we need to dig the address
912 the stub will return to out of the stack. */
913 u
= find_unwind_entry (pc
);
914 if (u
&& u
->stub_unwind
.stub_type
!= 0)
915 return DEPRECATED_FRAME_SAVED_PC (frame
);
921 hppa_frame_saved_pc (struct frame_info
*frame
)
923 CORE_ADDR pc
= get_frame_pc (frame
);
924 struct unwind_table_entry
*u
;
925 CORE_ADDR old_pc
= 0;
926 int spun_around_loop
= 0;
929 /* BSD, HPUX & OSF1 all lay out the hardware state in the same manner
930 at the base of the frame in an interrupt handler. Registers within
931 are saved in the exact same order as GDB numbers registers. How
933 if (pc_in_interrupt_handler (pc
))
934 return read_memory_integer (get_frame_base (frame
) + PC_REGNUM
* 4,
935 TARGET_PTR_BIT
/ 8) & ~0x3;
937 if ((get_frame_pc (frame
) >= get_frame_base (frame
)
938 && (get_frame_pc (frame
)
939 <= (get_frame_base (frame
)
940 /* A call dummy is sized in words, but it is actually a
941 series of instructions. Account for that scaling
943 + ((DEPRECATED_REGISTER_SIZE
/ INSTRUCTION_SIZE
)
944 * DEPRECATED_CALL_DUMMY_LENGTH
)
945 /* Similarly we have to account for 64bit wide register
947 + (32 * DEPRECATED_REGISTER_SIZE
)
948 /* We always consider FP regs 8 bytes long. */
949 + (NUM_REGS
- FP0_REGNUM
) * 8
950 /* Similarly we have to account for 64bit wide register
952 + (6 * DEPRECATED_REGISTER_SIZE
)))))
954 return read_memory_integer ((get_frame_base (frame
)
955 + (TARGET_PTR_BIT
== 64 ? -16 : -20)),
956 TARGET_PTR_BIT
/ 8) & ~0x3;
959 #ifdef FRAME_SAVED_PC_IN_SIGTRAMP
960 /* Deal with signal handler caller frames too. */
961 if ((get_frame_type (frame
) == SIGTRAMP_FRAME
))
964 FRAME_SAVED_PC_IN_SIGTRAMP (frame
, &rp
);
969 if (hppa_frameless_function_invocation (frame
))
973 ret_regnum
= find_return_regnum (pc
);
975 /* If the next frame is an interrupt frame or a signal
976 handler caller, then we need to look in the saved
977 register area to get the return pointer (the values
978 in the registers may not correspond to anything useful). */
979 if (get_next_frame (frame
)
980 && ((get_frame_type (get_next_frame (frame
)) == SIGTRAMP_FRAME
)
981 || pc_in_interrupt_handler (get_frame_pc (get_next_frame (frame
)))))
983 CORE_ADDR
*saved_regs
;
984 hppa_frame_init_saved_regs (get_next_frame (frame
));
985 saved_regs
= get_frame_saved_regs (get_next_frame (frame
));
986 if (read_memory_integer (saved_regs
[FLAGS_REGNUM
],
987 TARGET_PTR_BIT
/ 8) & 0x2)
989 pc
= read_memory_integer (saved_regs
[31],
990 TARGET_PTR_BIT
/ 8) & ~0x3;
992 /* Syscalls are really two frames. The syscall stub itself
993 with a return pointer in %rp and the kernel call with
994 a return pointer in %r31. We return the %rp variant
995 if %r31 is the same as frame->pc. */
996 if (pc
== get_frame_pc (frame
))
997 pc
= read_memory_integer (saved_regs
[RP_REGNUM
],
998 TARGET_PTR_BIT
/ 8) & ~0x3;
1001 pc
= read_memory_integer (saved_regs
[RP_REGNUM
],
1002 TARGET_PTR_BIT
/ 8) & ~0x3;
1005 pc
= read_register (ret_regnum
) & ~0x3;
1009 spun_around_loop
= 0;
1013 rp_offset
= rp_saved (pc
);
1015 /* Similar to code in frameless function case. If the next
1016 frame is a signal or interrupt handler, then dig the right
1017 information out of the saved register info. */
1019 && get_next_frame (frame
)
1020 && ((get_frame_type (get_next_frame (frame
)) == SIGTRAMP_FRAME
)
1021 || pc_in_interrupt_handler (get_frame_pc (get_next_frame (frame
)))))
1023 CORE_ADDR
*saved_regs
;
1024 hppa_frame_init_saved_regs (get_next_frame (frame
));
1025 saved_regs
= get_frame_saved_regs (get_next_frame (frame
));
1026 if (read_memory_integer (saved_regs
[FLAGS_REGNUM
],
1027 TARGET_PTR_BIT
/ 8) & 0x2)
1029 pc
= read_memory_integer (saved_regs
[31],
1030 TARGET_PTR_BIT
/ 8) & ~0x3;
1032 /* Syscalls are really two frames. The syscall stub itself
1033 with a return pointer in %rp and the kernel call with
1034 a return pointer in %r31. We return the %rp variant
1035 if %r31 is the same as frame->pc. */
1036 if (pc
== get_frame_pc (frame
))
1037 pc
= read_memory_integer (saved_regs
[RP_REGNUM
],
1038 TARGET_PTR_BIT
/ 8) & ~0x3;
1041 pc
= read_memory_integer (saved_regs
[RP_REGNUM
],
1042 TARGET_PTR_BIT
/ 8) & ~0x3;
1044 else if (rp_offset
== 0)
1047 pc
= read_register (RP_REGNUM
) & ~0x3;
1052 pc
= read_memory_integer (get_frame_base (frame
) + rp_offset
,
1053 TARGET_PTR_BIT
/ 8) & ~0x3;
1057 /* If PC is inside a linker stub, then dig out the address the stub
1060 Don't do this for long branch stubs. Why? For some unknown reason
1061 _start is marked as a long branch stub in hpux10. */
1062 u
= find_unwind_entry (pc
);
1063 if (u
&& u
->stub_unwind
.stub_type
!= 0
1064 && u
->stub_unwind
.stub_type
!= LONG_BRANCH
)
1068 /* If this is a dynamic executable, and we're in a signal handler,
1069 then the call chain will eventually point us into the stub for
1070 _sigreturn. Unlike most cases, we'll be pointed to the branch
1071 to the real sigreturn rather than the code after the real branch!.
1073 Else, try to dig the address the stub will return to in the normal
1075 insn
= read_memory_integer (pc
, 4);
1076 if ((insn
& 0xfc00e000) == 0xe8000000)
1077 return (pc
+ extract_17 (insn
) + 8) & ~0x3;
1083 if (spun_around_loop
> 1)
1085 /* We're just about to go around the loop again with
1086 no more hope of success. Die. */
1087 error ("Unable to find return pc for this frame");
1097 /* We need to correct the PC and the FP for the outermost frame when we are
1098 in a system call. */
1101 hppa_init_extra_frame_info (int fromleaf
, struct frame_info
*frame
)
1106 if (get_next_frame (frame
) && !fromleaf
)
1109 /* If the next frame represents a frameless function invocation then
1110 we have to do some adjustments that are normally done by
1111 DEPRECATED_FRAME_CHAIN. (DEPRECATED_FRAME_CHAIN is not called in
1115 /* Find the framesize of *this* frame without peeking at the PC
1116 in the current frame structure (it isn't set yet). */
1117 framesize
= find_proc_framesize (DEPRECATED_FRAME_SAVED_PC (get_next_frame (frame
)));
1119 /* Now adjust our base frame accordingly. If we have a frame pointer
1120 use it, else subtract the size of this frame from the current
1121 frame. (we always want frame->frame to point at the lowest address
1123 if (framesize
== -1)
1124 deprecated_update_frame_base_hack (frame
, deprecated_read_fp ());
1126 deprecated_update_frame_base_hack (frame
, get_frame_base (frame
) - framesize
);
1130 flags
= read_register (FLAGS_REGNUM
);
1131 if (flags
& 2) /* In system call? */
1132 deprecated_update_frame_pc_hack (frame
, read_register (31) & ~0x3);
1134 /* The outermost frame is always derived from PC-framesize
1136 One might think frameless innermost frames should have
1137 a frame->frame that is the same as the parent's frame->frame.
1138 That is wrong; frame->frame in that case should be the *high*
1139 address of the parent's frame. It's complicated as hell to
1140 explain, but the parent *always* creates some stack space for
1141 the child. So the child actually does have a frame of some
1142 sorts, and its base is the high address in its parent's frame. */
1143 framesize
= find_proc_framesize (get_frame_pc (frame
));
1144 if (framesize
== -1)
1145 deprecated_update_frame_base_hack (frame
, deprecated_read_fp ());
1147 deprecated_update_frame_base_hack (frame
, read_register (SP_REGNUM
) - framesize
);
1150 /* Given a GDB frame, determine the address of the calling function's
1151 frame. This will be used to create a new GDB frame struct, and
1152 then DEPRECATED_INIT_EXTRA_FRAME_INFO and DEPRECATED_INIT_FRAME_PC
1153 will be called for the new frame.
1155 This may involve searching through prologues for several functions
1156 at boundaries where GCC calls HP C code, or where code which has
1157 a frame pointer calls code without a frame pointer. */
1160 hppa_frame_chain (struct frame_info
*frame
)
1162 int my_framesize
, caller_framesize
;
1163 struct unwind_table_entry
*u
;
1164 CORE_ADDR frame_base
;
1165 struct frame_info
*tmp_frame
;
1167 /* A frame in the current frame list, or zero. */
1168 struct frame_info
*saved_regs_frame
= 0;
1169 /* Where the registers were saved in saved_regs_frame. If
1170 saved_regs_frame is zero, this is garbage. */
1171 CORE_ADDR
*saved_regs
= NULL
;
1173 CORE_ADDR caller_pc
;
1175 struct minimal_symbol
*min_frame_symbol
;
1176 struct symbol
*frame_symbol
;
1177 char *frame_symbol_name
;
1179 /* If this is a threaded application, and we see the
1180 routine "__pthread_exit", treat it as the stack root
1182 min_frame_symbol
= lookup_minimal_symbol_by_pc (get_frame_pc (frame
));
1183 frame_symbol
= find_pc_function (get_frame_pc (frame
));
1185 if ((min_frame_symbol
!= 0) /* && (frame_symbol == 0) */ )
1187 /* The test above for "no user function name" would defend
1188 against the slim likelihood that a user might define a
1189 routine named "__pthread_exit" and then try to debug it.
1191 If it weren't commented out, and you tried to debug the
1192 pthread library itself, you'd get errors.
1194 So for today, we don't make that check. */
1195 frame_symbol_name
= DEPRECATED_SYMBOL_NAME (min_frame_symbol
);
1196 if (frame_symbol_name
!= 0)
1198 if (0 == strncmp (frame_symbol_name
,
1199 THREAD_INITIAL_FRAME_SYMBOL
,
1200 THREAD_INITIAL_FRAME_SYM_LEN
))
1202 /* Pretend we've reached the bottom of the stack. */
1203 return (CORE_ADDR
) 0;
1206 } /* End of hacky code for threads. */
1208 /* Handle HPUX, BSD, and OSF1 style interrupt frames first. These
1209 are easy; at *sp we have a full save state strucutre which we can
1210 pull the old stack pointer from. Also see frame_saved_pc for
1211 code to dig a saved PC out of the save state structure. */
1212 if (pc_in_interrupt_handler (get_frame_pc (frame
)))
1213 frame_base
= read_memory_integer (get_frame_base (frame
) + SP_REGNUM
* 4,
1214 TARGET_PTR_BIT
/ 8);
1215 #ifdef FRAME_BASE_BEFORE_SIGTRAMP
1216 else if ((get_frame_type (frame
) == SIGTRAMP_FRAME
))
1218 FRAME_BASE_BEFORE_SIGTRAMP (frame
, &frame_base
);
1222 frame_base
= get_frame_base (frame
);
1224 /* Get frame sizes for the current frame and the frame of the
1226 my_framesize
= find_proc_framesize (get_frame_pc (frame
));
1227 caller_pc
= DEPRECATED_FRAME_SAVED_PC (frame
);
1229 /* If we can't determine the caller's PC, then it's not likely we can
1230 really determine anything meaningful about its frame. We'll consider
1231 this to be stack bottom. */
1232 if (caller_pc
== (CORE_ADDR
) 0)
1233 return (CORE_ADDR
) 0;
1235 caller_framesize
= find_proc_framesize (DEPRECATED_FRAME_SAVED_PC (frame
));
1237 /* If caller does not have a frame pointer, then its frame
1238 can be found at current_frame - caller_framesize. */
1239 if (caller_framesize
!= -1)
1241 return frame_base
- caller_framesize
;
1243 /* Both caller and callee have frame pointers and are GCC compiled
1244 (SAVE_SP bit in unwind descriptor is on for both functions.
1245 The previous frame pointer is found at the top of the current frame. */
1246 if (caller_framesize
== -1 && my_framesize
== -1)
1248 return read_memory_integer (frame_base
, TARGET_PTR_BIT
/ 8);
1250 /* Caller has a frame pointer, but callee does not. This is a little
1251 more difficult as GCC and HP C lay out locals and callee register save
1252 areas very differently.
1254 The previous frame pointer could be in a register, or in one of
1255 several areas on the stack.
1257 Walk from the current frame to the innermost frame examining
1258 unwind descriptors to determine if %r3 ever gets saved into the
1259 stack. If so return whatever value got saved into the stack.
1260 If it was never saved in the stack, then the value in %r3 is still
1263 We use information from unwind descriptors to determine if %r3
1264 is saved into the stack (Entry_GR field has this information). */
1266 for (tmp_frame
= frame
; tmp_frame
; tmp_frame
= get_next_frame (tmp_frame
))
1268 u
= find_unwind_entry (get_frame_pc (tmp_frame
));
1272 /* We could find this information by examining prologues. I don't
1273 think anyone has actually written any tools (not even "strip")
1274 which leave them out of an executable, so maybe this is a moot
1276 /* ??rehrauer: Actually, it's quite possible to stepi your way into
1277 code that doesn't have unwind entries. For example, stepping into
1278 the dynamic linker will give you a PC that has none. Thus, I've
1279 disabled this warning. */
1281 warning ("Unable to find unwind for PC 0x%x -- Help!", get_frame_pc (tmp_frame
));
1283 return (CORE_ADDR
) 0;
1287 || (get_frame_type (tmp_frame
) == SIGTRAMP_FRAME
)
1288 || pc_in_interrupt_handler (get_frame_pc (tmp_frame
)))
1291 /* Entry_GR specifies the number of callee-saved general registers
1292 saved in the stack. It starts at %r3, so %r3 would be 1. */
1293 if (u
->Entry_GR
>= 1)
1295 /* The unwind entry claims that r3 is saved here. However,
1296 in optimized code, GCC often doesn't actually save r3.
1297 We'll discover this if we look at the prologue. */
1298 hppa_frame_init_saved_regs (tmp_frame
);
1299 saved_regs
= get_frame_saved_regs (tmp_frame
);
1300 saved_regs_frame
= tmp_frame
;
1302 /* If we have an address for r3, that's good. */
1303 if (saved_regs
[DEPRECATED_FP_REGNUM
])
1310 /* We may have walked down the chain into a function with a frame
1313 && !(get_frame_type (tmp_frame
) == SIGTRAMP_FRAME
)
1314 && !pc_in_interrupt_handler (get_frame_pc (tmp_frame
)))
1316 return read_memory_integer (get_frame_base (tmp_frame
), TARGET_PTR_BIT
/ 8);
1318 /* %r3 was saved somewhere in the stack. Dig it out. */
1323 For optimization purposes many kernels don't have the
1324 callee saved registers into the save_state structure upon
1325 entry into the kernel for a syscall; the optimization
1326 is usually turned off if the process is being traced so
1327 that the debugger can get full register state for the
1330 This scheme works well except for two cases:
1332 * Attaching to a process when the process is in the
1333 kernel performing a system call (debugger can't get
1334 full register state for the inferior process since
1335 the process wasn't being traced when it entered the
1338 * Register state is not complete if the system call
1339 causes the process to core dump.
1342 The following heinous code is an attempt to deal with
1343 the lack of register state in a core dump. It will
1344 fail miserably if the function which performs the
1345 system call has a variable sized stack frame. */
1347 if (tmp_frame
!= saved_regs_frame
)
1349 hppa_frame_init_saved_regs (tmp_frame
);
1350 saved_regs
= get_frame_saved_regs (tmp_frame
);
1353 /* Abominable hack. */
1354 if (current_target
.to_has_execution
== 0
1355 && ((saved_regs
[FLAGS_REGNUM
]
1356 && (read_memory_integer (saved_regs
[FLAGS_REGNUM
],
1359 || (saved_regs
[FLAGS_REGNUM
] == 0
1360 && read_register (FLAGS_REGNUM
) & 0x2)))
1362 u
= find_unwind_entry (DEPRECATED_FRAME_SAVED_PC (frame
));
1365 return read_memory_integer (saved_regs
[DEPRECATED_FP_REGNUM
],
1366 TARGET_PTR_BIT
/ 8);
1370 return frame_base
- (u
->Total_frame_size
<< 3);
1374 return read_memory_integer (saved_regs
[DEPRECATED_FP_REGNUM
],
1375 TARGET_PTR_BIT
/ 8);
1380 /* Get the innermost frame. */
1382 while (get_next_frame (tmp_frame
) != NULL
)
1383 tmp_frame
= get_next_frame (tmp_frame
);
1385 if (tmp_frame
!= saved_regs_frame
)
1387 hppa_frame_init_saved_regs (tmp_frame
);
1388 saved_regs
= get_frame_saved_regs (tmp_frame
);
1391 /* Abominable hack. See above. */
1392 if (current_target
.to_has_execution
== 0
1393 && ((saved_regs
[FLAGS_REGNUM
]
1394 && (read_memory_integer (saved_regs
[FLAGS_REGNUM
],
1397 || (saved_regs
[FLAGS_REGNUM
] == 0
1398 && read_register (FLAGS_REGNUM
) & 0x2)))
1400 u
= find_unwind_entry (DEPRECATED_FRAME_SAVED_PC (frame
));
1403 return read_memory_integer (saved_regs
[DEPRECATED_FP_REGNUM
],
1404 TARGET_PTR_BIT
/ 8);
1408 return frame_base
- (u
->Total_frame_size
<< 3);
1412 /* The value in %r3 was never saved into the stack (thus %r3 still
1413 holds the value of the previous frame pointer). */
1414 return deprecated_read_fp ();
1419 /* To see if a frame chain is valid, see if the caller looks like it
1420 was compiled with gcc. */
1423 hppa_frame_chain_valid (CORE_ADDR chain
, struct frame_info
*thisframe
)
1425 struct minimal_symbol
*msym_us
;
1426 struct minimal_symbol
*msym_start
;
1427 struct unwind_table_entry
*u
, *next_u
= NULL
;
1428 struct frame_info
*next
;
1430 u
= find_unwind_entry (get_frame_pc (thisframe
));
1435 /* We can't just check that the same of msym_us is "_start", because
1436 someone idiotically decided that they were going to make a Ltext_end
1437 symbol with the same address. This Ltext_end symbol is totally
1438 indistinguishable (as nearly as I can tell) from the symbol for a function
1439 which is (legitimately, since it is in the user's namespace)
1440 named Ltext_end, so we can't just ignore it. */
1441 msym_us
= lookup_minimal_symbol_by_pc (DEPRECATED_FRAME_SAVED_PC (thisframe
));
1442 msym_start
= lookup_minimal_symbol ("_start", NULL
, NULL
);
1445 && SYMBOL_VALUE_ADDRESS (msym_us
) == SYMBOL_VALUE_ADDRESS (msym_start
))
1448 /* Grrrr. Some new idiot decided that they don't want _start for the
1449 PRO configurations; $START$ calls main directly.... Deal with it. */
1450 msym_start
= lookup_minimal_symbol ("$START$", NULL
, NULL
);
1453 && SYMBOL_VALUE_ADDRESS (msym_us
) == SYMBOL_VALUE_ADDRESS (msym_start
))
1456 next
= get_next_frame (thisframe
);
1458 next_u
= find_unwind_entry (get_frame_pc (next
));
1460 /* If this frame does not save SP, has no stack, isn't a stub,
1461 and doesn't "call" an interrupt routine or signal handler caller,
1462 then its not valid. */
1463 if (u
->Save_SP
|| u
->Total_frame_size
|| u
->stub_unwind
.stub_type
!= 0
1464 || (get_next_frame (thisframe
) && (get_frame_type (get_next_frame (thisframe
)) == SIGTRAMP_FRAME
))
1465 || (next_u
&& next_u
->HP_UX_interrupt_marker
))
1468 if (pc_in_linker_stub (get_frame_pc (thisframe
)))
1474 /* These functions deal with saving and restoring register state
1475 around a function call in the inferior. They keep the stack
1476 double-word aligned; eventually, on an hp700, the stack will have
1477 to be aligned to a 64-byte boundary. */
1480 hppa_push_dummy_frame (void)
1482 CORE_ADDR sp
, pc
, pcspace
;
1483 register int regnum
;
1484 CORE_ADDR int_buffer
;
1487 pc
= hppa_target_read_pc (inferior_ptid
);
1488 int_buffer
= read_register (FLAGS_REGNUM
);
1489 if (int_buffer
& 0x2)
1491 const unsigned int sid
= (pc
>> 30) & 0x3;
1493 pcspace
= read_register (SR4_REGNUM
);
1495 pcspace
= read_register (SR4_REGNUM
+ 4 + sid
);
1498 pcspace
= read_register (PCSQ_HEAD_REGNUM
);
1500 /* Space for "arguments"; the RP goes in here. */
1501 sp
= read_register (SP_REGNUM
) + 48;
1502 int_buffer
= read_register (RP_REGNUM
) | 0x3;
1504 /* The 32bit and 64bit ABIs save the return pointer into different
1506 if (DEPRECATED_REGISTER_SIZE
== 8)
1507 write_memory (sp
- 16, (char *) &int_buffer
, DEPRECATED_REGISTER_SIZE
);
1509 write_memory (sp
- 20, (char *) &int_buffer
, DEPRECATED_REGISTER_SIZE
);
1511 int_buffer
= deprecated_read_fp ();
1512 write_memory (sp
, (char *) &int_buffer
, DEPRECATED_REGISTER_SIZE
);
1514 write_register (DEPRECATED_FP_REGNUM
, sp
);
1516 sp
+= 2 * DEPRECATED_REGISTER_SIZE
;
1518 for (regnum
= 1; regnum
< 32; regnum
++)
1519 if (regnum
!= RP_REGNUM
&& regnum
!= DEPRECATED_FP_REGNUM
)
1520 sp
= push_word (sp
, read_register (regnum
));
1522 /* This is not necessary for the 64bit ABI. In fact it is dangerous. */
1523 if (DEPRECATED_REGISTER_SIZE
!= 8)
1526 for (regnum
= FP0_REGNUM
; regnum
< NUM_REGS
; regnum
++)
1528 deprecated_read_register_bytes (REGISTER_BYTE (regnum
),
1529 (char *) &freg_buffer
, 8);
1530 sp
= push_bytes (sp
, (char *) &freg_buffer
, 8);
1532 sp
= push_word (sp
, read_register (IPSW_REGNUM
));
1533 sp
= push_word (sp
, read_register (SAR_REGNUM
));
1534 sp
= push_word (sp
, pc
);
1535 sp
= push_word (sp
, pcspace
);
1536 sp
= push_word (sp
, pc
+ 4);
1537 sp
= push_word (sp
, pcspace
);
1538 write_register (SP_REGNUM
, sp
);
1542 find_dummy_frame_regs (struct frame_info
*frame
,
1543 CORE_ADDR frame_saved_regs
[])
1545 CORE_ADDR fp
= get_frame_base (frame
);
1548 /* The 32bit and 64bit ABIs save RP into different locations. */
1549 if (DEPRECATED_REGISTER_SIZE
== 8)
1550 frame_saved_regs
[RP_REGNUM
] = (fp
- 16) & ~0x3;
1552 frame_saved_regs
[RP_REGNUM
] = (fp
- 20) & ~0x3;
1554 frame_saved_regs
[DEPRECATED_FP_REGNUM
] = fp
;
1556 frame_saved_regs
[1] = fp
+ (2 * DEPRECATED_REGISTER_SIZE
);
1558 for (fp
+= 3 * DEPRECATED_REGISTER_SIZE
, i
= 3; i
< 32; i
++)
1560 if (i
!= DEPRECATED_FP_REGNUM
)
1562 frame_saved_regs
[i
] = fp
;
1563 fp
+= DEPRECATED_REGISTER_SIZE
;
1567 /* This is not necessary or desirable for the 64bit ABI. */
1568 if (DEPRECATED_REGISTER_SIZE
!= 8)
1571 for (i
= FP0_REGNUM
; i
< NUM_REGS
; i
++, fp
+= 8)
1572 frame_saved_regs
[i
] = fp
;
1574 frame_saved_regs
[IPSW_REGNUM
] = fp
;
1575 frame_saved_regs
[SAR_REGNUM
] = fp
+ DEPRECATED_REGISTER_SIZE
;
1576 frame_saved_regs
[PCOQ_HEAD_REGNUM
] = fp
+ 2 * DEPRECATED_REGISTER_SIZE
;
1577 frame_saved_regs
[PCSQ_HEAD_REGNUM
] = fp
+ 3 * DEPRECATED_REGISTER_SIZE
;
1578 frame_saved_regs
[PCOQ_TAIL_REGNUM
] = fp
+ 4 * DEPRECATED_REGISTER_SIZE
;
1579 frame_saved_regs
[PCSQ_TAIL_REGNUM
] = fp
+ 5 * DEPRECATED_REGISTER_SIZE
;
1583 hppa_pop_frame (void)
1585 register struct frame_info
*frame
= get_current_frame ();
1586 register CORE_ADDR fp
, npc
, target_pc
;
1587 register int regnum
;
1591 fp
= get_frame_base (frame
);
1592 hppa_frame_init_saved_regs (frame
);
1593 fsr
= get_frame_saved_regs (frame
);
1595 #ifndef NO_PC_SPACE_QUEUE_RESTORE
1596 if (fsr
[IPSW_REGNUM
]) /* Restoring a call dummy frame */
1597 restore_pc_queue (fsr
);
1600 for (regnum
= 31; regnum
> 0; regnum
--)
1602 write_register (regnum
, read_memory_integer (fsr
[regnum
],
1603 DEPRECATED_REGISTER_SIZE
));
1605 for (regnum
= NUM_REGS
- 1; regnum
>= FP0_REGNUM
; regnum
--)
1608 read_memory (fsr
[regnum
], (char *) &freg_buffer
, 8);
1609 deprecated_write_register_bytes (REGISTER_BYTE (regnum
),
1610 (char *) &freg_buffer
, 8);
1613 if (fsr
[IPSW_REGNUM
])
1614 write_register (IPSW_REGNUM
,
1615 read_memory_integer (fsr
[IPSW_REGNUM
],
1616 DEPRECATED_REGISTER_SIZE
));
1618 if (fsr
[SAR_REGNUM
])
1619 write_register (SAR_REGNUM
,
1620 read_memory_integer (fsr
[SAR_REGNUM
],
1621 DEPRECATED_REGISTER_SIZE
));
1623 /* If the PC was explicitly saved, then just restore it. */
1624 if (fsr
[PCOQ_TAIL_REGNUM
])
1626 npc
= read_memory_integer (fsr
[PCOQ_TAIL_REGNUM
],
1627 DEPRECATED_REGISTER_SIZE
);
1628 write_register (PCOQ_TAIL_REGNUM
, npc
);
1630 /* Else use the value in %rp to set the new PC. */
1633 npc
= read_register (RP_REGNUM
);
1637 write_register (DEPRECATED_FP_REGNUM
, read_memory_integer (fp
, DEPRECATED_REGISTER_SIZE
));
1639 if (fsr
[IPSW_REGNUM
]) /* call dummy */
1640 write_register (SP_REGNUM
, fp
- 48);
1642 write_register (SP_REGNUM
, fp
);
1644 /* The PC we just restored may be inside a return trampoline. If so
1645 we want to restart the inferior and run it through the trampoline.
1647 Do this by setting a momentary breakpoint at the location the
1648 trampoline returns to.
1650 Don't skip through the trampoline if we're popping a dummy frame. */
1651 target_pc
= SKIP_TRAMPOLINE_CODE (npc
& ~0x3) & ~0x3;
1652 if (target_pc
&& !fsr
[IPSW_REGNUM
])
1654 struct symtab_and_line sal
;
1655 struct breakpoint
*breakpoint
;
1656 struct cleanup
*old_chain
;
1658 /* Set up our breakpoint. Set it to be silent as the MI code
1659 for "return_command" will print the frame we returned to. */
1660 sal
= find_pc_line (target_pc
, 0);
1662 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_finish
);
1663 breakpoint
->silent
= 1;
1665 /* So we can clean things up. */
1666 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
1668 /* Start up the inferior. */
1669 clear_proceed_status ();
1670 proceed_to_finish
= 1;
1671 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 0);
1673 /* Perform our cleanups. */
1674 do_cleanups (old_chain
);
1676 flush_cached_frames ();
1679 /* After returning to a dummy on the stack, restore the instruction
1680 queue space registers. */
1683 restore_pc_queue (CORE_ADDR
*fsr
)
1685 CORE_ADDR pc
= read_pc ();
1686 CORE_ADDR new_pc
= read_memory_integer (fsr
[PCOQ_HEAD_REGNUM
],
1687 TARGET_PTR_BIT
/ 8);
1688 struct target_waitstatus w
;
1691 /* Advance past break instruction in the call dummy. */
1692 write_register (PCOQ_HEAD_REGNUM
, pc
+ 4);
1693 write_register (PCOQ_TAIL_REGNUM
, pc
+ 8);
1695 /* HPUX doesn't let us set the space registers or the space
1696 registers of the PC queue through ptrace. Boo, hiss.
1697 Conveniently, the call dummy has this sequence of instructions
1702 So, load up the registers and single step until we are in the
1705 write_register (21, read_memory_integer (fsr
[PCSQ_HEAD_REGNUM
],
1706 DEPRECATED_REGISTER_SIZE
));
1707 write_register (22, new_pc
);
1709 for (insn_count
= 0; insn_count
< 3; insn_count
++)
1711 /* FIXME: What if the inferior gets a signal right now? Want to
1712 merge this into wait_for_inferior (as a special kind of
1713 watchpoint? By setting a breakpoint at the end? Is there
1714 any other choice? Is there *any* way to do this stuff with
1715 ptrace() or some equivalent?). */
1717 target_wait (inferior_ptid
, &w
);
1719 if (w
.kind
== TARGET_WAITKIND_SIGNALLED
)
1721 stop_signal
= w
.value
.sig
;
1722 terminal_ours_for_output ();
1723 printf_unfiltered ("\nProgram terminated with signal %s, %s.\n",
1724 target_signal_to_name (stop_signal
),
1725 target_signal_to_string (stop_signal
));
1726 gdb_flush (gdb_stdout
);
1730 target_terminal_ours ();
1731 target_fetch_registers (-1);
1736 #ifdef PA20W_CALLING_CONVENTIONS
1738 /* This function pushes a stack frame with arguments as part of the
1739 inferior function calling mechanism.
1741 This is the version for the PA64, in which later arguments appear
1742 at higher addresses. (The stack always grows towards higher
1745 We simply allocate the appropriate amount of stack space and put
1746 arguments into their proper slots. The call dummy code will copy
1747 arguments into registers as needed by the ABI.
1749 This ABI also requires that the caller provide an argument pointer
1750 to the callee, so we do that too. */
1753 hppa_push_arguments (int nargs
, struct value
**args
, CORE_ADDR sp
,
1754 int struct_return
, CORE_ADDR struct_addr
)
1756 /* array of arguments' offsets */
1757 int *offset
= (int *) alloca (nargs
* sizeof (int));
1759 /* array of arguments' lengths: real lengths in bytes, not aligned to
1761 int *lengths
= (int *) alloca (nargs
* sizeof (int));
1763 /* The value of SP as it was passed into this function after
1765 CORE_ADDR orig_sp
= STACK_ALIGN (sp
);
1767 /* The number of stack bytes occupied by the current argument. */
1770 /* The total number of bytes reserved for the arguments. */
1771 int cum_bytes_reserved
= 0;
1773 /* Similarly, but aligned. */
1774 int cum_bytes_aligned
= 0;
1777 /* Iterate over each argument provided by the user. */
1778 for (i
= 0; i
< nargs
; i
++)
1780 struct type
*arg_type
= VALUE_TYPE (args
[i
]);
1782 /* Integral scalar values smaller than a register are padded on
1783 the left. We do this by promoting them to full-width,
1784 although the ABI says to pad them with garbage. */
1785 if (is_integral_type (arg_type
)
1786 && TYPE_LENGTH (arg_type
) < DEPRECATED_REGISTER_SIZE
)
1788 args
[i
] = value_cast ((TYPE_UNSIGNED (arg_type
)
1789 ? builtin_type_unsigned_long
1790 : builtin_type_long
),
1792 arg_type
= VALUE_TYPE (args
[i
]);
1795 lengths
[i
] = TYPE_LENGTH (arg_type
);
1797 /* Align the size of the argument to the word size for this
1799 bytes_reserved
= (lengths
[i
] + DEPRECATED_REGISTER_SIZE
- 1) & -DEPRECATED_REGISTER_SIZE
;
1801 offset
[i
] = cum_bytes_reserved
;
1803 /* Aggregates larger than eight bytes (the only types larger
1804 than eight bytes we have) are aligned on a 16-byte boundary,
1805 possibly padded on the right with garbage. This may leave an
1806 empty word on the stack, and thus an unused register, as per
1808 if (bytes_reserved
> 8)
1810 /* Round up the offset to a multiple of two slots. */
1811 int new_offset
= ((offset
[i
] + 2*DEPRECATED_REGISTER_SIZE
-1)
1812 & -(2*DEPRECATED_REGISTER_SIZE
));
1814 /* Note the space we've wasted, if any. */
1815 bytes_reserved
+= new_offset
- offset
[i
];
1816 offset
[i
] = new_offset
;
1819 cum_bytes_reserved
+= bytes_reserved
;
1822 /* CUM_BYTES_RESERVED already accounts for all the arguments
1823 passed by the user. However, the ABIs mandate minimum stack space
1824 allocations for outgoing arguments.
1826 The ABIs also mandate minimum stack alignments which we must
1828 cum_bytes_aligned
= STACK_ALIGN (cum_bytes_reserved
);
1829 sp
+= max (cum_bytes_aligned
, REG_PARM_STACK_SPACE
);
1831 /* Now write each of the args at the proper offset down the stack. */
1832 for (i
= 0; i
< nargs
; i
++)
1833 write_memory (orig_sp
+ offset
[i
], VALUE_CONTENTS (args
[i
]), lengths
[i
]);
1835 /* If a structure has to be returned, set up register 28 to hold its
1838 write_register (28, struct_addr
);
1840 /* For the PA64 we must pass a pointer to the outgoing argument list.
1841 The ABI mandates that the pointer should point to the first byte of
1842 storage beyond the register flushback area.
1844 However, the call dummy expects the outgoing argument pointer to
1845 be passed in register %r4. */
1846 write_register (4, orig_sp
+ REG_PARM_STACK_SPACE
);
1848 /* ?!? This needs further work. We need to set up the global data
1849 pointer for this procedure. This assumes the same global pointer
1850 for every procedure. The call dummy expects the dp value to
1851 be passed in register %r6. */
1852 write_register (6, read_register (27));
1854 /* The stack will have 64 bytes of additional space for a frame marker. */
1860 /* This function pushes a stack frame with arguments as part of the
1861 inferior function calling mechanism.
1863 This is the version of the function for the 32-bit PA machines, in
1864 which later arguments appear at lower addresses. (The stack always
1865 grows towards higher addresses.)
1867 We simply allocate the appropriate amount of stack space and put
1868 arguments into their proper slots. The call dummy code will copy
1869 arguments into registers as needed by the ABI. */
1872 hppa_push_arguments (int nargs
, struct value
**args
, CORE_ADDR sp
,
1873 int struct_return
, CORE_ADDR struct_addr
)
1875 /* array of arguments' offsets */
1876 int *offset
= (int *) alloca (nargs
* sizeof (int));
1878 /* array of arguments' lengths: real lengths in bytes, not aligned to
1880 int *lengths
= (int *) alloca (nargs
* sizeof (int));
1882 /* The number of stack bytes occupied by the current argument. */
1885 /* The total number of bytes reserved for the arguments. */
1886 int cum_bytes_reserved
= 0;
1888 /* Similarly, but aligned. */
1889 int cum_bytes_aligned
= 0;
1892 /* Iterate over each argument provided by the user. */
1893 for (i
= 0; i
< nargs
; i
++)
1895 lengths
[i
] = TYPE_LENGTH (VALUE_TYPE (args
[i
]));
1897 /* Align the size of the argument to the word size for this
1899 bytes_reserved
= (lengths
[i
] + DEPRECATED_REGISTER_SIZE
- 1) & -DEPRECATED_REGISTER_SIZE
;
1901 offset
[i
] = (cum_bytes_reserved
1902 + (lengths
[i
] > 4 ? bytes_reserved
: lengths
[i
]));
1904 /* If the argument is a double word argument, then it needs to be
1905 double word aligned. */
1906 if ((bytes_reserved
== 2 * DEPRECATED_REGISTER_SIZE
)
1907 && (offset
[i
] % 2 * DEPRECATED_REGISTER_SIZE
))
1910 /* BYTES_RESERVED is already aligned to the word, so we put
1911 the argument at one word more down the stack.
1913 This will leave one empty word on the stack, and one unused
1914 register as mandated by the ABI. */
1915 new_offset
= ((offset
[i
] + 2 * DEPRECATED_REGISTER_SIZE
- 1)
1916 & -(2 * DEPRECATED_REGISTER_SIZE
));
1918 if ((new_offset
- offset
[i
]) >= 2 * DEPRECATED_REGISTER_SIZE
)
1920 bytes_reserved
+= DEPRECATED_REGISTER_SIZE
;
1921 offset
[i
] += DEPRECATED_REGISTER_SIZE
;
1925 cum_bytes_reserved
+= bytes_reserved
;
1929 /* CUM_BYTES_RESERVED already accounts for all the arguments passed
1930 by the user. However, the ABI mandates minimum stack space
1931 allocations for outgoing arguments.
1933 The ABI also mandates minimum stack alignments which we must
1935 cum_bytes_aligned
= STACK_ALIGN (cum_bytes_reserved
);
1936 sp
+= max (cum_bytes_aligned
, REG_PARM_STACK_SPACE
);
1938 /* Now write each of the args at the proper offset down the stack.
1939 ?!? We need to promote values to a full register instead of skipping
1940 words in the stack. */
1941 for (i
= 0; i
< nargs
; i
++)
1942 write_memory (sp
- offset
[i
], VALUE_CONTENTS (args
[i
]), lengths
[i
]);
1944 /* If a structure has to be returned, set up register 28 to hold its
1947 write_register (28, struct_addr
);
1949 /* The stack will have 32 bytes of additional space for a frame marker. */
1955 /* elz: this function returns a value which is built looking at the given address.
1956 It is called from call_function_by_hand, in case we need to return a
1957 value which is larger than 64 bits, and it is stored in the stack rather than
1958 in the registers r28 and r29 or fr4.
1959 This function does the same stuff as value_being_returned in values.c, but
1960 gets the value from the stack rather than from the buffer where all the
1961 registers were saved when the function called completed. */
1963 hppa_value_returned_from_stack (register struct type
*valtype
, CORE_ADDR addr
)
1965 register struct value
*val
;
1967 val
= allocate_value (valtype
);
1968 CHECK_TYPEDEF (valtype
);
1969 target_read_memory (addr
, VALUE_CONTENTS_RAW (val
), TYPE_LENGTH (valtype
));
1976 /* elz: Used to lookup a symbol in the shared libraries.
1977 This function calls shl_findsym, indirectly through a
1978 call to __d_shl_get. __d_shl_get is in end.c, which is always
1979 linked in by the hp compilers/linkers.
1980 The call to shl_findsym cannot be made directly because it needs
1981 to be active in target address space.
1982 inputs: - minimal symbol pointer for the function we want to look up
1983 - address in target space of the descriptor for the library
1984 where we want to look the symbol up.
1985 This address is retrieved using the
1986 som_solib_get_solib_by_pc function (somsolib.c).
1987 output: - real address in the library of the function.
1988 note: the handle can be null, in which case shl_findsym will look for
1989 the symbol in all the loaded shared libraries.
1990 files to look at if you need reference on this stuff:
1991 dld.c, dld_shl_findsym.c
1993 man entry for shl_findsym */
1996 find_stub_with_shl_get (struct minimal_symbol
*function
, CORE_ADDR handle
)
1998 struct symbol
*get_sym
, *symbol2
;
1999 struct minimal_symbol
*buff_minsym
, *msymbol
;
2001 struct value
**args
;
2002 struct value
*funcval
;
2005 int x
, namelen
, err_value
, tmp
= -1;
2006 CORE_ADDR endo_buff_addr
, value_return_addr
, errno_return_addr
;
2007 CORE_ADDR stub_addr
;
2010 args
= alloca (sizeof (struct value
*) * 8); /* 6 for the arguments and one null one??? */
2011 funcval
= find_function_in_inferior ("__d_shl_get");
2012 get_sym
= lookup_symbol ("__d_shl_get", NULL
, VAR_DOMAIN
, NULL
, NULL
);
2013 buff_minsym
= lookup_minimal_symbol ("__buffer", NULL
, NULL
);
2014 msymbol
= lookup_minimal_symbol ("__shldp", NULL
, NULL
);
2015 symbol2
= lookup_symbol ("__shldp", NULL
, VAR_DOMAIN
, NULL
, NULL
);
2016 endo_buff_addr
= SYMBOL_VALUE_ADDRESS (buff_minsym
);
2017 namelen
= strlen (DEPRECATED_SYMBOL_NAME (function
));
2018 value_return_addr
= endo_buff_addr
+ namelen
;
2019 ftype
= check_typedef (SYMBOL_TYPE (get_sym
));
2022 if ((x
= value_return_addr
% 64) != 0)
2023 value_return_addr
= value_return_addr
+ 64 - x
;
2025 errno_return_addr
= value_return_addr
+ 64;
2028 /* set up stuff needed by __d_shl_get in buffer in end.o */
2030 target_write_memory (endo_buff_addr
, DEPRECATED_SYMBOL_NAME (function
), namelen
);
2032 target_write_memory (value_return_addr
, (char *) &tmp
, 4);
2034 target_write_memory (errno_return_addr
, (char *) &tmp
, 4);
2036 target_write_memory (SYMBOL_VALUE_ADDRESS (msymbol
),
2037 (char *) &handle
, 4);
2039 /* now prepare the arguments for the call */
2041 args
[0] = value_from_longest (TYPE_FIELD_TYPE (ftype
, 0), 12);
2042 args
[1] = value_from_pointer (TYPE_FIELD_TYPE (ftype
, 1), SYMBOL_VALUE_ADDRESS (msymbol
));
2043 args
[2] = value_from_pointer (TYPE_FIELD_TYPE (ftype
, 2), endo_buff_addr
);
2044 args
[3] = value_from_longest (TYPE_FIELD_TYPE (ftype
, 3), TYPE_PROCEDURE
);
2045 args
[4] = value_from_pointer (TYPE_FIELD_TYPE (ftype
, 4), value_return_addr
);
2046 args
[5] = value_from_pointer (TYPE_FIELD_TYPE (ftype
, 5), errno_return_addr
);
2048 /* now call the function */
2050 val
= call_function_by_hand (funcval
, 6, args
);
2052 /* now get the results */
2054 target_read_memory (errno_return_addr
, (char *) &err_value
, sizeof (err_value
));
2056 target_read_memory (value_return_addr
, (char *) &stub_addr
, sizeof (stub_addr
));
2058 error ("call to __d_shl_get failed, error code is %d", err_value
);
2063 /* Cover routine for find_stub_with_shl_get to pass to catch_errors */
2065 cover_find_stub_with_shl_get (void *args_untyped
)
2067 args_for_find_stub
*args
= args_untyped
;
2068 args
->return_val
= find_stub_with_shl_get (args
->msym
, args
->solib_handle
);
2072 /* Insert the specified number of args and function address
2073 into a call sequence of the above form stored at DUMMYNAME.
2075 On the hppa we need to call the stack dummy through $$dyncall.
2076 Therefore our version of DEPRECATED_FIX_CALL_DUMMY takes an extra
2077 argument, real_pc, which is the location where gdb should start up
2078 the inferior to do the function call.
2080 This has to work across several versions of hpux, bsd, osf1. It has to
2081 work regardless of what compiler was used to build the inferior program.
2082 It should work regardless of whether or not end.o is available. It has
2083 to work even if gdb can not call into the dynamic loader in the inferior
2084 to query it for symbol names and addresses.
2086 Yes, all those cases should work. Luckily code exists to handle most
2087 of them. The complexity is in selecting exactly what scheme should
2088 be used to perform the inferior call.
2090 At the current time this routine is known not to handle cases where
2091 the program was linked with HP's compiler without including end.o.
2093 Please contact Jeff Law (law@cygnus.com) before changing this code. */
2096 hppa_fix_call_dummy (char *dummy
, CORE_ADDR pc
, CORE_ADDR fun
, int nargs
,
2097 struct value
**args
, struct type
*type
, int gcc_p
)
2099 CORE_ADDR dyncall_addr
;
2100 struct minimal_symbol
*msymbol
;
2101 struct minimal_symbol
*trampoline
;
2102 int flags
= read_register (FLAGS_REGNUM
);
2103 struct unwind_table_entry
*u
= NULL
;
2104 CORE_ADDR new_stub
= 0;
2105 CORE_ADDR solib_handle
= 0;
2107 /* Nonzero if we will use GCC's PLT call routine. This routine must be
2108 passed an import stub, not a PLABEL. It is also necessary to set %r19
2109 (the PIC register) before performing the call.
2111 If zero, then we are using __d_plt_call (HP's PLT call routine) or we
2112 are calling the target directly. When using __d_plt_call we want to
2113 use a PLABEL instead of an import stub. */
2114 int using_gcc_plt_call
= 1;
2116 #ifdef GDB_TARGET_IS_HPPA_20W
2117 /* We currently use completely different code for the PA2.0W inferior
2118 function call sequences. This needs to be cleaned up. */
2120 CORE_ADDR pcsqh
, pcsqt
, pcoqh
, pcoqt
, sr5
;
2121 struct target_waitstatus w
;
2125 struct objfile
*objfile
;
2127 /* We can not modify the PC space queues directly, so we start
2128 up the inferior and execute a couple instructions to set the
2129 space queues so that they point to the call dummy in the stack. */
2130 pcsqh
= read_register (PCSQ_HEAD_REGNUM
);
2131 sr5
= read_register (SR5_REGNUM
);
2134 pcoqh
= read_register (PCOQ_HEAD_REGNUM
);
2135 pcoqt
= read_register (PCOQ_TAIL_REGNUM
);
2136 if (target_read_memory (pcoqh
, buf
, 4) != 0)
2137 error ("Couldn't modify space queue\n");
2138 inst1
= extract_unsigned_integer (buf
, 4);
2140 if (target_read_memory (pcoqt
, buf
, 4) != 0)
2141 error ("Couldn't modify space queue\n");
2142 inst2
= extract_unsigned_integer (buf
, 4);
2145 *((int *) buf
) = 0xe820d000;
2146 if (target_write_memory (pcoqh
, buf
, 4) != 0)
2147 error ("Couldn't modify space queue\n");
2150 *((int *) buf
) = 0x08000240;
2151 if (target_write_memory (pcoqt
, buf
, 4) != 0)
2153 *((int *) buf
) = inst1
;
2154 target_write_memory (pcoqh
, buf
, 4);
2155 error ("Couldn't modify space queue\n");
2158 write_register (1, pc
);
2160 /* Single step twice, the BVE instruction will set the space queue
2161 such that it points to the PC value written immediately above
2162 (ie the call dummy). */
2164 target_wait (inferior_ptid
, &w
);
2166 target_wait (inferior_ptid
, &w
);
2168 /* Restore the two instructions at the old PC locations. */
2169 *((int *) buf
) = inst1
;
2170 target_write_memory (pcoqh
, buf
, 4);
2171 *((int *) buf
) = inst2
;
2172 target_write_memory (pcoqt
, buf
, 4);
2175 /* The call dummy wants the ultimate destination address initially
2177 write_register (5, fun
);
2179 /* We need to see if this objfile has a different DP value than our
2180 own (it could be a shared library for example). */
2181 ALL_OBJFILES (objfile
)
2183 struct obj_section
*s
;
2184 obj_private_data_t
*obj_private
;
2186 /* See if FUN is in any section within this shared library. */
2187 for (s
= objfile
->sections
; s
< objfile
->sections_end
; s
++)
2188 if (s
->addr
<= fun
&& fun
< s
->endaddr
)
2191 if (s
>= objfile
->sections_end
)
2194 obj_private
= (obj_private_data_t
*) objfile
->obj_private
;
2196 /* The DP value may be different for each objfile. But within an
2197 objfile each function uses the same dp value. Thus we do not need
2198 to grope around the opd section looking for dp values.
2200 ?!? This is not strictly correct since we may be in a shared library
2201 and want to call back into the main program. To make that case
2202 work correctly we need to set obj_private->dp for the main program's
2203 objfile, then remove this conditional. */
2204 if (obj_private
->dp
)
2205 write_register (27, obj_private
->dp
);
2212 #ifndef GDB_TARGET_IS_HPPA_20W
2213 /* Prefer __gcc_plt_call over the HP supplied routine because
2214 __gcc_plt_call works for any number of arguments. */
2216 if (lookup_minimal_symbol ("__gcc_plt_call", NULL
, NULL
) == NULL
)
2217 using_gcc_plt_call
= 0;
2219 msymbol
= lookup_minimal_symbol ("$$dyncall", NULL
, NULL
);
2220 if (msymbol
== NULL
)
2221 error ("Can't find an address for $$dyncall trampoline");
2223 dyncall_addr
= SYMBOL_VALUE_ADDRESS (msymbol
);
2225 /* FUN could be a procedure label, in which case we have to get
2226 its real address and the value of its GOT/DP if we plan to
2227 call the routine via gcc_plt_call. */
2228 if ((fun
& 0x2) && using_gcc_plt_call
)
2230 /* Get the GOT/DP value for the target function. It's
2231 at *(fun+4). Note the call dummy is *NOT* allowed to
2232 trash %r19 before calling the target function. */
2233 write_register (19, read_memory_integer ((fun
& ~0x3) + 4,
2234 DEPRECATED_REGISTER_SIZE
));
2236 /* Now get the real address for the function we are calling, it's
2238 fun
= (CORE_ADDR
) read_memory_integer (fun
& ~0x3,
2239 TARGET_PTR_BIT
/ 8);
2244 #ifndef GDB_TARGET_IS_PA_ELF
2245 /* FUN could be an export stub, the real address of a function, or
2246 a PLABEL. When using gcc's PLT call routine we must call an import
2247 stub rather than the export stub or real function for lazy binding
2250 If we are using the gcc PLT call routine, then we need to
2251 get the import stub for the target function. */
2252 if (using_gcc_plt_call
&& som_solib_get_got_by_pc (fun
))
2254 struct objfile
*objfile
;
2255 struct minimal_symbol
*funsymbol
, *stub_symbol
;
2256 CORE_ADDR newfun
= 0;
2258 funsymbol
= lookup_minimal_symbol_by_pc (fun
);
2260 error ("Unable to find minimal symbol for target function.\n");
2262 /* Search all the object files for an import symbol with the
2264 ALL_OBJFILES (objfile
)
2267 = lookup_minimal_symbol_solib_trampoline
2268 (DEPRECATED_SYMBOL_NAME (funsymbol
), NULL
, objfile
);
2271 stub_symbol
= lookup_minimal_symbol (DEPRECATED_SYMBOL_NAME (funsymbol
),
2274 /* Found a symbol with the right name. */
2277 struct unwind_table_entry
*u
;
2278 /* It must be a shared library trampoline. */
2279 if (MSYMBOL_TYPE (stub_symbol
) != mst_solib_trampoline
)
2282 /* It must also be an import stub. */
2283 u
= find_unwind_entry (SYMBOL_VALUE (stub_symbol
));
2285 || (u
->stub_unwind
.stub_type
!= IMPORT
2286 #ifdef GDB_NATIVE_HPUX_11
2287 /* Sigh. The hpux 10.20 dynamic linker will blow
2288 chunks if we perform a call to an unbound function
2289 via the IMPORT_SHLIB stub. The hpux 11.00 dynamic
2290 linker will blow chunks if we do not call the
2291 unbound function via the IMPORT_SHLIB stub.
2293 We currently have no way to select bevahior on just
2294 the target. However, we only support HPUX/SOM in
2295 native mode. So we conditinalize on a native
2296 #ifdef. Ugly. Ugly. Ugly */
2297 && u
->stub_unwind
.stub_type
!= IMPORT_SHLIB
2302 /* OK. Looks like the correct import stub. */
2303 newfun
= SYMBOL_VALUE (stub_symbol
);
2306 /* If we found an IMPORT stub, then we want to stop
2307 searching now. If we found an IMPORT_SHLIB, we want
2308 to continue the search in the hopes that we will find
2310 if (u
->stub_unwind
.stub_type
== IMPORT
)
2315 /* Ouch. We did not find an import stub. Make an attempt to
2316 do the right thing instead of just croaking. Most of the
2317 time this will actually work. */
2319 write_register (19, som_solib_get_got_by_pc (fun
));
2321 u
= find_unwind_entry (fun
);
2323 && (u
->stub_unwind
.stub_type
== IMPORT
2324 || u
->stub_unwind
.stub_type
== IMPORT_SHLIB
))
2325 trampoline
= lookup_minimal_symbol ("__gcc_plt_call", NULL
, NULL
);
2327 /* If we found the import stub in the shared library, then we have
2328 to set %r19 before we call the stub. */
2329 if (u
&& u
->stub_unwind
.stub_type
== IMPORT_SHLIB
)
2330 write_register (19, som_solib_get_got_by_pc (fun
));
2335 /* If we are calling into another load module then have sr4export call the
2336 magic __d_plt_call routine which is linked in from end.o.
2338 You can't use _sr4export to make the call as the value in sp-24 will get
2339 fried and you end up returning to the wrong location. You can't call the
2340 target as the code to bind the PLT entry to a function can't return to a
2343 Also, query the dynamic linker in the inferior to provide a suitable
2344 PLABEL for the target function. */
2345 if (!using_gcc_plt_call
)
2349 /* Get a handle for the shared library containing FUN. Given the
2350 handle we can query the shared library for a PLABEL. */
2351 solib_handle
= som_solib_get_solib_by_pc (fun
);
2355 struct minimal_symbol
*fmsymbol
= lookup_minimal_symbol_by_pc (fun
);
2357 trampoline
= lookup_minimal_symbol ("__d_plt_call", NULL
, NULL
);
2359 if (trampoline
== NULL
)
2361 error ("Can't find an address for __d_plt_call or __gcc_plt_call trampoline\nSuggest linking executable with -g or compiling with gcc.");
2364 /* This is where sr4export will jump to. */
2365 new_fun
= SYMBOL_VALUE_ADDRESS (trampoline
);
2367 /* If the function is in a shared library, then call __d_shl_get to
2368 get a PLABEL for the target function. */
2369 new_stub
= find_stub_with_shl_get (fmsymbol
, solib_handle
);
2372 error ("Can't find an import stub for %s", DEPRECATED_SYMBOL_NAME (fmsymbol
));
2374 /* We have to store the address of the stub in __shlib_funcptr. */
2375 msymbol
= lookup_minimal_symbol ("__shlib_funcptr", NULL
,
2376 (struct objfile
*) NULL
);
2378 if (msymbol
== NULL
)
2379 error ("Can't find an address for __shlib_funcptr");
2380 target_write_memory (SYMBOL_VALUE_ADDRESS (msymbol
),
2381 (char *) &new_stub
, 4);
2383 /* We want sr4export to call __d_plt_call, so we claim it is
2384 the final target. Clear trampoline. */
2390 /* Store upper 21 bits of function address into ldil. fun will either be
2391 the final target (most cases) or __d_plt_call when calling into a shared
2392 library and __gcc_plt_call is not available. */
2393 store_unsigned_integer
2394 (&dummy
[FUNC_LDIL_OFFSET
],
2396 deposit_21 (fun
>> 11,
2397 extract_unsigned_integer (&dummy
[FUNC_LDIL_OFFSET
],
2398 INSTRUCTION_SIZE
)));
2400 /* Store lower 11 bits of function address into ldo */
2401 store_unsigned_integer
2402 (&dummy
[FUNC_LDO_OFFSET
],
2404 deposit_14 (fun
& MASK_11
,
2405 extract_unsigned_integer (&dummy
[FUNC_LDO_OFFSET
],
2406 INSTRUCTION_SIZE
)));
2407 #ifdef SR4EXPORT_LDIL_OFFSET
2410 CORE_ADDR trampoline_addr
;
2412 /* We may still need sr4export's address too. */
2414 if (trampoline
== NULL
)
2416 msymbol
= lookup_minimal_symbol ("_sr4export", NULL
, NULL
);
2417 if (msymbol
== NULL
)
2418 error ("Can't find an address for _sr4export trampoline");
2420 trampoline_addr
= SYMBOL_VALUE_ADDRESS (msymbol
);
2423 trampoline_addr
= SYMBOL_VALUE_ADDRESS (trampoline
);
2426 /* Store upper 21 bits of trampoline's address into ldil */
2427 store_unsigned_integer
2428 (&dummy
[SR4EXPORT_LDIL_OFFSET
],
2430 deposit_21 (trampoline_addr
>> 11,
2431 extract_unsigned_integer (&dummy
[SR4EXPORT_LDIL_OFFSET
],
2432 INSTRUCTION_SIZE
)));
2434 /* Store lower 11 bits of trampoline's address into ldo */
2435 store_unsigned_integer
2436 (&dummy
[SR4EXPORT_LDO_OFFSET
],
2438 deposit_14 (trampoline_addr
& MASK_11
,
2439 extract_unsigned_integer (&dummy
[SR4EXPORT_LDO_OFFSET
],
2440 INSTRUCTION_SIZE
)));
2444 write_register (22, pc
);
2446 /* If we are in a syscall, then we should call the stack dummy
2447 directly. $$dyncall is not needed as the kernel sets up the
2448 space id registers properly based on the value in %r31. In
2449 fact calling $$dyncall will not work because the value in %r22
2450 will be clobbered on the syscall exit path.
2452 Similarly if the current PC is in a shared library. Note however,
2453 this scheme won't work if the shared library isn't mapped into
2454 the same space as the stack. */
2457 #ifndef GDB_TARGET_IS_PA_ELF
2458 else if (som_solib_get_got_by_pc (hppa_target_read_pc (inferior_ptid
)))
2462 return dyncall_addr
;
2466 /* If the pid is in a syscall, then the FP register is not readable.
2467 We'll return zero in that case, rather than attempting to read it
2468 and cause a warning. */
2471 hppa_read_fp (int pid
)
2473 int flags
= read_register (FLAGS_REGNUM
);
2477 return (CORE_ADDR
) 0;
2480 /* This is the only site that may directly read_register () the FP
2481 register. All others must use deprecated_read_fp (). */
2482 return read_register (DEPRECATED_FP_REGNUM
);
2486 hppa_target_read_fp (void)
2488 return hppa_read_fp (PIDGET (inferior_ptid
));
2491 /* Get the PC from %r31 if currently in a syscall. Also mask out privilege
2495 hppa_target_read_pc (ptid_t ptid
)
2497 int flags
= read_register_pid (FLAGS_REGNUM
, ptid
);
2499 /* The following test does not belong here. It is OS-specific, and belongs
2501 /* Test SS_INSYSCALL */
2503 return read_register_pid (31, ptid
) & ~0x3;
2505 return read_register_pid (PC_REGNUM
, ptid
) & ~0x3;
2508 /* Write out the PC. If currently in a syscall, then also write the new
2509 PC value into %r31. */
2512 hppa_target_write_pc (CORE_ADDR v
, ptid_t ptid
)
2514 int flags
= read_register_pid (FLAGS_REGNUM
, ptid
);
2516 /* The following test does not belong here. It is OS-specific, and belongs
2518 /* If in a syscall, then set %r31. Also make sure to get the
2519 privilege bits set correctly. */
2520 /* Test SS_INSYSCALL */
2522 write_register_pid (31, v
| 0x3, ptid
);
2524 write_register_pid (PC_REGNUM
, v
, ptid
);
2525 write_register_pid (NPC_REGNUM
, v
+ 4, ptid
);
2528 /* return the alignment of a type in bytes. Structures have the maximum
2529 alignment required by their fields. */
2532 hppa_alignof (struct type
*type
)
2534 int max_align
, align
, i
;
2535 CHECK_TYPEDEF (type
);
2536 switch (TYPE_CODE (type
))
2541 return TYPE_LENGTH (type
);
2542 case TYPE_CODE_ARRAY
:
2543 return hppa_alignof (TYPE_FIELD_TYPE (type
, 0));
2544 case TYPE_CODE_STRUCT
:
2545 case TYPE_CODE_UNION
:
2547 for (i
= 0; i
< TYPE_NFIELDS (type
); i
++)
2549 /* Bit fields have no real alignment. */
2550 /* if (!TYPE_FIELD_BITPOS (type, i)) */
2551 if (!TYPE_FIELD_BITSIZE (type
, i
)) /* elz: this should be bitsize */
2553 align
= hppa_alignof (TYPE_FIELD_TYPE (type
, i
));
2554 max_align
= max (max_align
, align
);
2563 /* Print the register regnum, or all registers if regnum is -1 */
2566 pa_do_registers_info (int regnum
, int fpregs
)
2568 char *raw_regs
= alloca (DEPRECATED_REGISTER_BYTES
);
2571 /* Make a copy of gdb's save area (may cause actual
2572 reads from the target). */
2573 for (i
= 0; i
< NUM_REGS
; i
++)
2574 frame_register_read (deprecated_selected_frame
, i
, raw_regs
+ REGISTER_BYTE (i
));
2577 pa_print_registers (raw_regs
, regnum
, fpregs
);
2578 else if (regnum
< FP4_REGNUM
)
2582 /* Why is the value not passed through "extract_signed_integer"
2583 as in "pa_print_registers" below? */
2584 pa_register_look_aside (raw_regs
, regnum
, ®_val
[0]);
2588 printf_unfiltered ("%s %lx\n", REGISTER_NAME (regnum
), reg_val
[1]);
2592 /* Fancy % formats to prevent leading zeros. */
2593 if (reg_val
[0] == 0)
2594 printf_unfiltered ("%s %lx\n", REGISTER_NAME (regnum
), reg_val
[1]);
2596 printf_unfiltered ("%s %lx%8.8lx\n", REGISTER_NAME (regnum
),
2597 reg_val
[0], reg_val
[1]);
2601 /* Note that real floating point values only start at
2602 FP4_REGNUM. FP0 and up are just status and error
2603 registers, which have integral (bit) values. */
2604 pa_print_fp_reg (regnum
);
2607 /********** new function ********************/
2609 pa_do_strcat_registers_info (int regnum
, int fpregs
, struct ui_file
*stream
,
2610 enum precision_type precision
)
2612 char *raw_regs
= alloca (DEPRECATED_REGISTER_BYTES
);
2615 /* Make a copy of gdb's save area (may cause actual
2616 reads from the target). */
2617 for (i
= 0; i
< NUM_REGS
; i
++)
2618 frame_register_read (deprecated_selected_frame
, i
, raw_regs
+ REGISTER_BYTE (i
));
2621 pa_strcat_registers (raw_regs
, regnum
, fpregs
, stream
);
2623 else if (regnum
< FP4_REGNUM
)
2627 /* Why is the value not passed through "extract_signed_integer"
2628 as in "pa_print_registers" below? */
2629 pa_register_look_aside (raw_regs
, regnum
, ®_val
[0]);
2633 fprintf_unfiltered (stream
, "%s %lx", REGISTER_NAME (regnum
), reg_val
[1]);
2637 /* Fancy % formats to prevent leading zeros. */
2638 if (reg_val
[0] == 0)
2639 fprintf_unfiltered (stream
, "%s %lx", REGISTER_NAME (regnum
),
2642 fprintf_unfiltered (stream
, "%s %lx%8.8lx", REGISTER_NAME (regnum
),
2643 reg_val
[0], reg_val
[1]);
2647 /* Note that real floating point values only start at
2648 FP4_REGNUM. FP0 and up are just status and error
2649 registers, which have integral (bit) values. */
2650 pa_strcat_fp_reg (regnum
, stream
, precision
);
2653 /* If this is a PA2.0 machine, fetch the real 64-bit register
2654 value. Otherwise use the info from gdb's saved register area.
2656 Note that reg_val is really expected to be an array of longs,
2657 with two elements. */
2659 pa_register_look_aside (char *raw_regs
, int regnum
, long *raw_val
)
2661 static int know_which
= 0; /* False */
2664 unsigned int offset
;
2669 char buf
[MAX_REGISTER_SIZE
];
2674 if (CPU_PA_RISC2_0
== sysconf (_SC_CPU_VERSION
))
2679 know_which
= 1; /* True */
2687 raw_val
[1] = *(long *) (raw_regs
+ REGISTER_BYTE (regnum
));
2691 /* Code below copied from hppah-nat.c, with fixes for wide
2692 registers, using different area of save_state, etc. */
2693 if (regnum
== FLAGS_REGNUM
|| regnum
>= FP0_REGNUM
||
2694 !HAVE_STRUCT_SAVE_STATE_T
|| !HAVE_STRUCT_MEMBER_SS_WIDE
)
2696 /* Use narrow regs area of save_state and default macro. */
2697 offset
= U_REGS_OFFSET
;
2698 regaddr
= register_addr (regnum
, offset
);
2703 /* Use wide regs area, and calculate registers as 8 bytes wide.
2705 We'd like to do this, but current version of "C" doesn't
2708 offset = offsetof(save_state_t, ss_wide);
2710 Note that to avoid "C" doing typed pointer arithmetic, we
2711 have to cast away the type in our offset calculation:
2712 otherwise we get an offset of 1! */
2714 /* NB: save_state_t is not available before HPUX 9.
2715 The ss_wide field is not available previous to HPUX 10.20,
2716 so to avoid compile-time warnings, we only compile this for
2717 PA 2.0 processors. This control path should only be followed
2718 if we're debugging a PA 2.0 processor, so this should not cause
2721 /* #if the following code out so that this file can still be
2722 compiled on older HPUX boxes (< 10.20) which don't have
2723 this structure/structure member. */
2724 #if HAVE_STRUCT_SAVE_STATE_T == 1 && HAVE_STRUCT_MEMBER_SS_WIDE == 1
2727 offset
= ((int) &temp
.ss_wide
) - ((int) &temp
);
2728 regaddr
= offset
+ regnum
* 8;
2733 for (i
= start
; i
< 2; i
++)
2736 raw_val
[i
] = call_ptrace (PT_RUREGS
, PIDGET (inferior_ptid
),
2737 (PTRACE_ARG3_TYPE
) regaddr
, 0);
2740 /* Warning, not error, in case we are attached; sometimes the
2741 kernel doesn't let us at the registers. */
2742 char *err
= safe_strerror (errno
);
2743 char *msg
= alloca (strlen (err
) + 128);
2744 sprintf (msg
, "reading register %s: %s", REGISTER_NAME (regnum
), err
);
2749 regaddr
+= sizeof (long);
2752 if (regnum
== PCOQ_HEAD_REGNUM
|| regnum
== PCOQ_TAIL_REGNUM
)
2753 raw_val
[1] &= ~0x3; /* I think we're masking out space bits */
2759 /* "Info all-reg" command */
2762 pa_print_registers (char *raw_regs
, int regnum
, int fpregs
)
2765 /* Alas, we are compiled so that "long long" is 32 bits */
2768 int rows
= 48, columns
= 2;
2770 for (i
= 0; i
< rows
; i
++)
2772 for (j
= 0; j
< columns
; j
++)
2774 /* We display registers in column-major order. */
2775 int regnum
= i
+ j
* rows
;
2777 /* Q: Why is the value passed through "extract_signed_integer",
2778 while above, in "pa_do_registers_info" it isn't?
2780 pa_register_look_aside (raw_regs
, regnum
, &raw_val
[0]);
2782 /* Even fancier % formats to prevent leading zeros
2783 and still maintain the output in columns. */
2786 /* Being big-endian, on this machine the low bits
2787 (the ones we want to look at) are in the second longword. */
2788 long_val
= extract_signed_integer (&raw_val
[1], 4);
2789 printf_filtered ("%10.10s: %8lx ",
2790 REGISTER_NAME (regnum
), long_val
);
2794 /* raw_val = extract_signed_integer(&raw_val, 8); */
2795 if (raw_val
[0] == 0)
2796 printf_filtered ("%10.10s: %8lx ",
2797 REGISTER_NAME (regnum
), raw_val
[1]);
2799 printf_filtered ("%10.10s: %8lx%8.8lx ",
2800 REGISTER_NAME (regnum
),
2801 raw_val
[0], raw_val
[1]);
2804 printf_unfiltered ("\n");
2808 for (i
= FP4_REGNUM
; i
< NUM_REGS
; i
++) /* FP4_REGNUM == 72 */
2809 pa_print_fp_reg (i
);
2812 /************* new function ******************/
2814 pa_strcat_registers (char *raw_regs
, int regnum
, int fpregs
,
2815 struct ui_file
*stream
)
2818 long raw_val
[2]; /* Alas, we are compiled so that "long long" is 32 bits */
2820 enum precision_type precision
;
2822 precision
= unspecified_precision
;
2824 for (i
= 0; i
< 18; i
++)
2826 for (j
= 0; j
< 4; j
++)
2828 /* Q: Why is the value passed through "extract_signed_integer",
2829 while above, in "pa_do_registers_info" it isn't?
2831 pa_register_look_aside (raw_regs
, i
+ (j
* 18), &raw_val
[0]);
2833 /* Even fancier % formats to prevent leading zeros
2834 and still maintain the output in columns. */
2837 /* Being big-endian, on this machine the low bits
2838 (the ones we want to look at) are in the second longword. */
2839 long_val
= extract_signed_integer (&raw_val
[1], 4);
2840 fprintf_filtered (stream
, "%8.8s: %8lx ",
2841 REGISTER_NAME (i
+ (j
* 18)), long_val
);
2845 /* raw_val = extract_signed_integer(&raw_val, 8); */
2846 if (raw_val
[0] == 0)
2847 fprintf_filtered (stream
, "%8.8s: %8lx ",
2848 REGISTER_NAME (i
+ (j
* 18)), raw_val
[1]);
2850 fprintf_filtered (stream
, "%8.8s: %8lx%8.8lx ",
2851 REGISTER_NAME (i
+ (j
* 18)), raw_val
[0],
2855 fprintf_unfiltered (stream
, "\n");
2859 for (i
= FP4_REGNUM
; i
< NUM_REGS
; i
++) /* FP4_REGNUM == 72 */
2860 pa_strcat_fp_reg (i
, stream
, precision
);
2864 pa_print_fp_reg (int i
)
2866 char raw_buffer
[MAX_REGISTER_SIZE
];
2867 char virtual_buffer
[MAX_REGISTER_SIZE
];
2869 /* Get 32bits of data. */
2870 frame_register_read (deprecated_selected_frame
, i
, raw_buffer
);
2872 /* Put it in the buffer. No conversions are ever necessary. */
2873 memcpy (virtual_buffer
, raw_buffer
, REGISTER_RAW_SIZE (i
));
2875 fputs_filtered (REGISTER_NAME (i
), gdb_stdout
);
2876 print_spaces_filtered (8 - strlen (REGISTER_NAME (i
)), gdb_stdout
);
2877 fputs_filtered ("(single precision) ", gdb_stdout
);
2879 val_print (REGISTER_VIRTUAL_TYPE (i
), virtual_buffer
, 0, 0, gdb_stdout
, 0,
2880 1, 0, Val_pretty_default
);
2881 printf_filtered ("\n");
2883 /* If "i" is even, then this register can also be a double-precision
2884 FP register. Dump it out as such. */
2887 /* Get the data in raw format for the 2nd half. */
2888 frame_register_read (deprecated_selected_frame
, i
+ 1, raw_buffer
);
2890 /* Copy it into the appropriate part of the virtual buffer. */
2891 memcpy (virtual_buffer
+ REGISTER_RAW_SIZE (i
), raw_buffer
,
2892 REGISTER_RAW_SIZE (i
));
2894 /* Dump it as a double. */
2895 fputs_filtered (REGISTER_NAME (i
), gdb_stdout
);
2896 print_spaces_filtered (8 - strlen (REGISTER_NAME (i
)), gdb_stdout
);
2897 fputs_filtered ("(double precision) ", gdb_stdout
);
2899 val_print (builtin_type_double
, virtual_buffer
, 0, 0, gdb_stdout
, 0,
2900 1, 0, Val_pretty_default
);
2901 printf_filtered ("\n");
2905 /*************** new function ***********************/
2907 pa_strcat_fp_reg (int i
, struct ui_file
*stream
, enum precision_type precision
)
2909 char raw_buffer
[MAX_REGISTER_SIZE
];
2910 char virtual_buffer
[MAX_REGISTER_SIZE
];
2912 fputs_filtered (REGISTER_NAME (i
), stream
);
2913 print_spaces_filtered (8 - strlen (REGISTER_NAME (i
)), stream
);
2915 /* Get 32bits of data. */
2916 frame_register_read (deprecated_selected_frame
, i
, raw_buffer
);
2918 /* Put it in the buffer. No conversions are ever necessary. */
2919 memcpy (virtual_buffer
, raw_buffer
, REGISTER_RAW_SIZE (i
));
2921 if (precision
== double_precision
&& (i
% 2) == 0)
2924 char raw_buf
[MAX_REGISTER_SIZE
];
2926 /* Get the data in raw format for the 2nd half. */
2927 frame_register_read (deprecated_selected_frame
, i
+ 1, raw_buf
);
2929 /* Copy it into the appropriate part of the virtual buffer. */
2930 memcpy (virtual_buffer
+ REGISTER_RAW_SIZE (i
), raw_buf
, REGISTER_RAW_SIZE (i
));
2932 val_print (builtin_type_double
, virtual_buffer
, 0, 0, stream
, 0,
2933 1, 0, Val_pretty_default
);
2938 val_print (REGISTER_VIRTUAL_TYPE (i
), virtual_buffer
, 0, 0, stream
, 0,
2939 1, 0, Val_pretty_default
);
2944 /* Return one if PC is in the call path of a trampoline, else return zero.
2946 Note we return one for *any* call trampoline (long-call, arg-reloc), not
2947 just shared library trampolines (import, export). */
2950 hppa_in_solib_call_trampoline (CORE_ADDR pc
, char *name
)
2952 struct minimal_symbol
*minsym
;
2953 struct unwind_table_entry
*u
;
2954 static CORE_ADDR dyncall
= 0;
2955 static CORE_ADDR sr4export
= 0;
2957 #ifdef GDB_TARGET_IS_HPPA_20W
2958 /* PA64 has a completely different stub/trampoline scheme. Is it
2959 better? Maybe. It's certainly harder to determine with any
2960 certainty that we are in a stub because we can not refer to the
2963 The heuristic is simple. Try to lookup the current PC value in th
2964 minimal symbol table. If that fails, then assume we are not in a
2967 Then see if the PC value falls within the section bounds for the
2968 section containing the minimal symbol we found in the first
2969 step. If it does, then assume we are not in a stub and return.
2971 Finally peek at the instructions to see if they look like a stub. */
2973 struct minimal_symbol
*minsym
;
2978 minsym
= lookup_minimal_symbol_by_pc (pc
);
2982 sec
= SYMBOL_BFD_SECTION (minsym
);
2985 && sec
->vma
+ sec
->_cooked_size
< pc
)
2988 /* We might be in a stub. Peek at the instructions. Stubs are 3
2989 instructions long. */
2990 insn
= read_memory_integer (pc
, 4);
2992 /* Find out where we think we are within the stub. */
2993 if ((insn
& 0xffffc00e) == 0x53610000)
2995 else if ((insn
& 0xffffffff) == 0xe820d000)
2997 else if ((insn
& 0xffffc00e) == 0x537b0000)
3002 /* Now verify each insn in the range looks like a stub instruction. */
3003 insn
= read_memory_integer (addr
, 4);
3004 if ((insn
& 0xffffc00e) != 0x53610000)
3007 /* Now verify each insn in the range looks like a stub instruction. */
3008 insn
= read_memory_integer (addr
+ 4, 4);
3009 if ((insn
& 0xffffffff) != 0xe820d000)
3012 /* Now verify each insn in the range looks like a stub instruction. */
3013 insn
= read_memory_integer (addr
+ 8, 4);
3014 if ((insn
& 0xffffc00e) != 0x537b0000)
3017 /* Looks like a stub. */
3022 /* FIXME XXX - dyncall and sr4export must be initialized whenever we get a
3025 /* First see if PC is in one of the two C-library trampolines. */
3028 minsym
= lookup_minimal_symbol ("$$dyncall", NULL
, NULL
);
3030 dyncall
= SYMBOL_VALUE_ADDRESS (minsym
);
3037 minsym
= lookup_minimal_symbol ("_sr4export", NULL
, NULL
);
3039 sr4export
= SYMBOL_VALUE_ADDRESS (minsym
);
3044 if (pc
== dyncall
|| pc
== sr4export
)
3047 minsym
= lookup_minimal_symbol_by_pc (pc
);
3048 if (minsym
&& strcmp (DEPRECATED_SYMBOL_NAME (minsym
), ".stub") == 0)
3051 /* Get the unwind descriptor corresponding to PC, return zero
3052 if no unwind was found. */
3053 u
= find_unwind_entry (pc
);
3057 /* If this isn't a linker stub, then return now. */
3058 if (u
->stub_unwind
.stub_type
== 0)
3061 /* By definition a long-branch stub is a call stub. */
3062 if (u
->stub_unwind
.stub_type
== LONG_BRANCH
)
3065 /* The call and return path execute the same instructions within
3066 an IMPORT stub! So an IMPORT stub is both a call and return
3068 if (u
->stub_unwind
.stub_type
== IMPORT
)
3071 /* Parameter relocation stubs always have a call path and may have a
3073 if (u
->stub_unwind
.stub_type
== PARAMETER_RELOCATION
3074 || u
->stub_unwind
.stub_type
== EXPORT
)
3078 /* Search forward from the current PC until we hit a branch
3079 or the end of the stub. */
3080 for (addr
= pc
; addr
<= u
->region_end
; addr
+= 4)
3084 insn
= read_memory_integer (addr
, 4);
3086 /* Does it look like a bl? If so then it's the call path, if
3087 we find a bv or be first, then we're on the return path. */
3088 if ((insn
& 0xfc00e000) == 0xe8000000)
3090 else if ((insn
& 0xfc00e001) == 0xe800c000
3091 || (insn
& 0xfc000000) == 0xe0000000)
3095 /* Should never happen. */
3096 warning ("Unable to find branch in parameter relocation stub.\n");
3100 /* Unknown stub type. For now, just return zero. */
3104 /* Return one if PC is in the return path of a trampoline, else return zero.
3106 Note we return one for *any* call trampoline (long-call, arg-reloc), not
3107 just shared library trampolines (import, export). */
3110 hppa_in_solib_return_trampoline (CORE_ADDR pc
, char *name
)
3112 struct unwind_table_entry
*u
;
3114 /* Get the unwind descriptor corresponding to PC, return zero
3115 if no unwind was found. */
3116 u
= find_unwind_entry (pc
);
3120 /* If this isn't a linker stub or it's just a long branch stub, then
3122 if (u
->stub_unwind
.stub_type
== 0 || u
->stub_unwind
.stub_type
== LONG_BRANCH
)
3125 /* The call and return path execute the same instructions within
3126 an IMPORT stub! So an IMPORT stub is both a call and return
3128 if (u
->stub_unwind
.stub_type
== IMPORT
)
3131 /* Parameter relocation stubs always have a call path and may have a
3133 if (u
->stub_unwind
.stub_type
== PARAMETER_RELOCATION
3134 || u
->stub_unwind
.stub_type
== EXPORT
)
3138 /* Search forward from the current PC until we hit a branch
3139 or the end of the stub. */
3140 for (addr
= pc
; addr
<= u
->region_end
; addr
+= 4)
3144 insn
= read_memory_integer (addr
, 4);
3146 /* Does it look like a bl? If so then it's the call path, if
3147 we find a bv or be first, then we're on the return path. */
3148 if ((insn
& 0xfc00e000) == 0xe8000000)
3150 else if ((insn
& 0xfc00e001) == 0xe800c000
3151 || (insn
& 0xfc000000) == 0xe0000000)
3155 /* Should never happen. */
3156 warning ("Unable to find branch in parameter relocation stub.\n");
3160 /* Unknown stub type. For now, just return zero. */
3165 /* Figure out if PC is in a trampoline, and if so find out where
3166 the trampoline will jump to. If not in a trampoline, return zero.
3168 Simple code examination probably is not a good idea since the code
3169 sequences in trampolines can also appear in user code.
3171 We use unwinds and information from the minimal symbol table to
3172 determine when we're in a trampoline. This won't work for ELF
3173 (yet) since it doesn't create stub unwind entries. Whether or
3174 not ELF will create stub unwinds or normal unwinds for linker
3175 stubs is still being debated.
3177 This should handle simple calls through dyncall or sr4export,
3178 long calls, argument relocation stubs, and dyncall/sr4export
3179 calling an argument relocation stub. It even handles some stubs
3180 used in dynamic executables. */
3183 hppa_skip_trampoline_code (CORE_ADDR pc
)
3186 long prev_inst
, curr_inst
, loc
;
3187 static CORE_ADDR dyncall
= 0;
3188 static CORE_ADDR dyncall_external
= 0;
3189 static CORE_ADDR sr4export
= 0;
3190 struct minimal_symbol
*msym
;
3191 struct unwind_table_entry
*u
;
3193 /* FIXME XXX - dyncall and sr4export must be initialized whenever we get a
3198 msym
= lookup_minimal_symbol ("$$dyncall", NULL
, NULL
);
3200 dyncall
= SYMBOL_VALUE_ADDRESS (msym
);
3205 if (!dyncall_external
)
3207 msym
= lookup_minimal_symbol ("$$dyncall_external", NULL
, NULL
);
3209 dyncall_external
= SYMBOL_VALUE_ADDRESS (msym
);
3211 dyncall_external
= -1;
3216 msym
= lookup_minimal_symbol ("_sr4export", NULL
, NULL
);
3218 sr4export
= SYMBOL_VALUE_ADDRESS (msym
);
3223 /* Addresses passed to dyncall may *NOT* be the actual address
3224 of the function. So we may have to do something special. */
3227 pc
= (CORE_ADDR
) read_register (22);
3229 /* If bit 30 (counting from the left) is on, then pc is the address of
3230 the PLT entry for this function, not the address of the function
3231 itself. Bit 31 has meaning too, but only for MPE. */
3233 pc
= (CORE_ADDR
) read_memory_integer (pc
& ~0x3, TARGET_PTR_BIT
/ 8);
3235 if (pc
== dyncall_external
)
3237 pc
= (CORE_ADDR
) read_register (22);
3238 pc
= (CORE_ADDR
) read_memory_integer (pc
& ~0x3, TARGET_PTR_BIT
/ 8);
3240 else if (pc
== sr4export
)
3241 pc
= (CORE_ADDR
) (read_register (22));
3243 /* Get the unwind descriptor corresponding to PC, return zero
3244 if no unwind was found. */
3245 u
= find_unwind_entry (pc
);
3249 /* If this isn't a linker stub, then return now. */
3250 /* elz: attention here! (FIXME) because of a compiler/linker
3251 error, some stubs which should have a non zero stub_unwind.stub_type
3252 have unfortunately a value of zero. So this function would return here
3253 as if we were not in a trampoline. To fix this, we go look at the partial
3254 symbol information, which reports this guy as a stub.
3255 (FIXME): Unfortunately, we are not that lucky: it turns out that the
3256 partial symbol information is also wrong sometimes. This is because
3257 when it is entered (somread.c::som_symtab_read()) it can happen that
3258 if the type of the symbol (from the som) is Entry, and the symbol is
3259 in a shared library, then it can also be a trampoline. This would
3260 be OK, except that I believe the way they decide if we are ina shared library
3261 does not work. SOOOO..., even if we have a regular function w/o trampolines
3262 its minimal symbol can be assigned type mst_solib_trampoline.
3263 Also, if we find that the symbol is a real stub, then we fix the unwind
3264 descriptor, and define the stub type to be EXPORT.
3265 Hopefully this is correct most of the times. */
3266 if (u
->stub_unwind
.stub_type
== 0)
3269 /* elz: NOTE (FIXME!) once the problem with the unwind information is fixed
3270 we can delete all the code which appears between the lines */
3271 /*--------------------------------------------------------------------------*/
3272 msym
= lookup_minimal_symbol_by_pc (pc
);
3274 if (msym
== NULL
|| MSYMBOL_TYPE (msym
) != mst_solib_trampoline
)
3275 return orig_pc
== pc
? 0 : pc
& ~0x3;
3277 else if (msym
!= NULL
&& MSYMBOL_TYPE (msym
) == mst_solib_trampoline
)
3279 struct objfile
*objfile
;
3280 struct minimal_symbol
*msymbol
;
3281 int function_found
= 0;
3283 /* go look if there is another minimal symbol with the same name as
3284 this one, but with type mst_text. This would happen if the msym
3285 is an actual trampoline, in which case there would be another
3286 symbol with the same name corresponding to the real function */
3288 ALL_MSYMBOLS (objfile
, msymbol
)
3290 if (MSYMBOL_TYPE (msymbol
) == mst_text
3291 && STREQ (DEPRECATED_SYMBOL_NAME (msymbol
), DEPRECATED_SYMBOL_NAME (msym
)))
3299 /* the type of msym is correct (mst_solib_trampoline), but
3300 the unwind info is wrong, so set it to the correct value */
3301 u
->stub_unwind
.stub_type
= EXPORT
;
3303 /* the stub type info in the unwind is correct (this is not a
3304 trampoline), but the msym type information is wrong, it
3305 should be mst_text. So we need to fix the msym, and also
3306 get out of this function */
3308 MSYMBOL_TYPE (msym
) = mst_text
;
3309 return orig_pc
== pc
? 0 : pc
& ~0x3;
3313 /*--------------------------------------------------------------------------*/
3316 /* It's a stub. Search for a branch and figure out where it goes.
3317 Note we have to handle multi insn branch sequences like ldil;ble.
3318 Most (all?) other branches can be determined by examining the contents
3319 of certain registers and the stack. */
3326 /* Make sure we haven't walked outside the range of this stub. */
3327 if (u
!= find_unwind_entry (loc
))
3329 warning ("Unable to find branch in linker stub");
3330 return orig_pc
== pc
? 0 : pc
& ~0x3;
3333 prev_inst
= curr_inst
;
3334 curr_inst
= read_memory_integer (loc
, 4);
3336 /* Does it look like a branch external using %r1? Then it's the
3337 branch from the stub to the actual function. */
3338 if ((curr_inst
& 0xffe0e000) == 0xe0202000)
3340 /* Yup. See if the previous instruction loaded
3341 a value into %r1. If so compute and return the jump address. */
3342 if ((prev_inst
& 0xffe00000) == 0x20200000)
3343 return (extract_21 (prev_inst
) + extract_17 (curr_inst
)) & ~0x3;
3346 warning ("Unable to find ldil X,%%r1 before ble Y(%%sr4,%%r1).");
3347 return orig_pc
== pc
? 0 : pc
& ~0x3;
3351 /* Does it look like a be 0(sr0,%r21)? OR
3352 Does it look like a be, n 0(sr0,%r21)? OR
3353 Does it look like a bve (r21)? (this is on PA2.0)
3354 Does it look like a bve, n(r21)? (this is also on PA2.0)
3355 That's the branch from an
3356 import stub to an export stub.
3358 It is impossible to determine the target of the branch via
3359 simple examination of instructions and/or data (consider
3360 that the address in the plabel may be the address of the
3361 bind-on-reference routine in the dynamic loader).
3363 So we have try an alternative approach.
3365 Get the name of the symbol at our current location; it should
3366 be a stub symbol with the same name as the symbol in the
3369 Then lookup a minimal symbol with the same name; we should
3370 get the minimal symbol for the target routine in the shared
3371 library as those take precedence of import/export stubs. */
3372 if ((curr_inst
== 0xe2a00000) ||
3373 (curr_inst
== 0xe2a00002) ||
3374 (curr_inst
== 0xeaa0d000) ||
3375 (curr_inst
== 0xeaa0d002))
3377 struct minimal_symbol
*stubsym
, *libsym
;
3379 stubsym
= lookup_minimal_symbol_by_pc (loc
);
3380 if (stubsym
== NULL
)
3382 warning ("Unable to find symbol for 0x%lx", loc
);
3383 return orig_pc
== pc
? 0 : pc
& ~0x3;
3386 libsym
= lookup_minimal_symbol (DEPRECATED_SYMBOL_NAME (stubsym
), NULL
, NULL
);
3389 warning ("Unable to find library symbol for %s\n",
3390 DEPRECATED_SYMBOL_NAME (stubsym
));
3391 return orig_pc
== pc
? 0 : pc
& ~0x3;
3394 return SYMBOL_VALUE (libsym
);
3397 /* Does it look like bl X,%rp or bl X,%r0? Another way to do a
3398 branch from the stub to the actual function. */
3400 else if ((curr_inst
& 0xffe0e000) == 0xe8400000
3401 || (curr_inst
& 0xffe0e000) == 0xe8000000
3402 || (curr_inst
& 0xffe0e000) == 0xe800A000)
3403 return (loc
+ extract_17 (curr_inst
) + 8) & ~0x3;
3405 /* Does it look like bv (rp)? Note this depends on the
3406 current stack pointer being the same as the stack
3407 pointer in the stub itself! This is a branch on from the
3408 stub back to the original caller. */
3409 /*else if ((curr_inst & 0xffe0e000) == 0xe840c000) */
3410 else if ((curr_inst
& 0xffe0f000) == 0xe840c000)
3412 /* Yup. See if the previous instruction loaded
3414 if (prev_inst
== 0x4bc23ff1)
3415 return (read_memory_integer
3416 (read_register (SP_REGNUM
) - 8, 4)) & ~0x3;
3419 warning ("Unable to find restore of %%rp before bv (%%rp).");
3420 return orig_pc
== pc
? 0 : pc
& ~0x3;
3424 /* elz: added this case to capture the new instruction
3425 at the end of the return part of an export stub used by
3426 the PA2.0: BVE, n (rp) */
3427 else if ((curr_inst
& 0xffe0f000) == 0xe840d000)
3429 return (read_memory_integer
3430 (read_register (SP_REGNUM
) - 24, TARGET_PTR_BIT
/ 8)) & ~0x3;
3433 /* What about be,n 0(sr0,%rp)? It's just another way we return to
3434 the original caller from the stub. Used in dynamic executables. */
3435 else if (curr_inst
== 0xe0400002)
3437 /* The value we jump to is sitting in sp - 24. But that's
3438 loaded several instructions before the be instruction.
3439 I guess we could check for the previous instruction being
3440 mtsp %r1,%sr0 if we want to do sanity checking. */
3441 return (read_memory_integer
3442 (read_register (SP_REGNUM
) - 24, TARGET_PTR_BIT
/ 8)) & ~0x3;
3445 /* Haven't found the branch yet, but we're still in the stub.
3452 /* For the given instruction (INST), return any adjustment it makes
3453 to the stack pointer or zero for no adjustment.
3455 This only handles instructions commonly found in prologues. */
3458 prologue_inst_adjust_sp (unsigned long inst
)
3460 /* This must persist across calls. */
3461 static int save_high21
;
3463 /* The most common way to perform a stack adjustment ldo X(sp),sp */
3464 if ((inst
& 0xffffc000) == 0x37de0000)
3465 return extract_14 (inst
);
3468 if ((inst
& 0xffe00000) == 0x6fc00000)
3469 return extract_14 (inst
);
3471 /* std,ma X,D(sp) */
3472 if ((inst
& 0xffe00008) == 0x73c00008)
3473 return (inst
& 0x1 ? -1 << 13 : 0) | (((inst
>> 4) & 0x3ff) << 3);
3475 /* addil high21,%r1; ldo low11,(%r1),%r30)
3476 save high bits in save_high21 for later use. */
3477 if ((inst
& 0xffe00000) == 0x28200000)
3479 save_high21
= extract_21 (inst
);
3483 if ((inst
& 0xffff0000) == 0x343e0000)
3484 return save_high21
+ extract_14 (inst
);
3486 /* fstws as used by the HP compilers. */
3487 if ((inst
& 0xffffffe0) == 0x2fd01220)
3488 return extract_5_load (inst
);
3490 /* No adjustment. */
3494 /* Return nonzero if INST is a branch of some kind, else return zero. */
3497 is_branch (unsigned long inst
)
3526 /* Return the register number for a GR which is saved by INST or
3527 zero it INST does not save a GR. */
3530 inst_saves_gr (unsigned long inst
)
3532 /* Does it look like a stw? */
3533 if ((inst
>> 26) == 0x1a || (inst
>> 26) == 0x1b
3534 || (inst
>> 26) == 0x1f
3535 || ((inst
>> 26) == 0x1f
3536 && ((inst
>> 6) == 0xa)))
3537 return extract_5R_store (inst
);
3539 /* Does it look like a std? */
3540 if ((inst
>> 26) == 0x1c
3541 || ((inst
>> 26) == 0x03
3542 && ((inst
>> 6) & 0xf) == 0xb))
3543 return extract_5R_store (inst
);
3545 /* Does it look like a stwm? GCC & HPC may use this in prologues. */
3546 if ((inst
>> 26) == 0x1b)
3547 return extract_5R_store (inst
);
3549 /* Does it look like sth or stb? HPC versions 9.0 and later use these
3551 if ((inst
>> 26) == 0x19 || (inst
>> 26) == 0x18
3552 || ((inst
>> 26) == 0x3
3553 && (((inst
>> 6) & 0xf) == 0x8
3554 || (inst
>> 6) & 0xf) == 0x9))
3555 return extract_5R_store (inst
);
3560 /* Return the register number for a FR which is saved by INST or
3561 zero it INST does not save a FR.
3563 Note we only care about full 64bit register stores (that's the only
3564 kind of stores the prologue will use).
3566 FIXME: What about argument stores with the HP compiler in ANSI mode? */
3569 inst_saves_fr (unsigned long inst
)
3571 /* is this an FSTD ? */
3572 if ((inst
& 0xfc00dfc0) == 0x2c001200)
3573 return extract_5r_store (inst
);
3574 if ((inst
& 0xfc000002) == 0x70000002)
3575 return extract_5R_store (inst
);
3576 /* is this an FSTW ? */
3577 if ((inst
& 0xfc00df80) == 0x24001200)
3578 return extract_5r_store (inst
);
3579 if ((inst
& 0xfc000002) == 0x7c000000)
3580 return extract_5R_store (inst
);
3584 /* Advance PC across any function entry prologue instructions
3585 to reach some "real" code.
3587 Use information in the unwind table to determine what exactly should
3588 be in the prologue. */
3592 skip_prologue_hard_way (CORE_ADDR pc
)
3595 CORE_ADDR orig_pc
= pc
;
3596 unsigned long inst
, stack_remaining
, save_gr
, save_fr
, save_rp
, save_sp
;
3597 unsigned long args_stored
, status
, i
, restart_gr
, restart_fr
;
3598 struct unwind_table_entry
*u
;
3604 u
= find_unwind_entry (pc
);
3608 /* If we are not at the beginning of a function, then return now. */
3609 if ((pc
& ~0x3) != u
->region_start
)
3612 /* This is how much of a frame adjustment we need to account for. */
3613 stack_remaining
= u
->Total_frame_size
<< 3;
3615 /* Magic register saves we want to know about. */
3616 save_rp
= u
->Save_RP
;
3617 save_sp
= u
->Save_SP
;
3619 /* An indication that args may be stored into the stack. Unfortunately
3620 the HPUX compilers tend to set this in cases where no args were
3624 /* Turn the Entry_GR field into a bitmask. */
3626 for (i
= 3; i
< u
->Entry_GR
+ 3; i
++)
3628 /* Frame pointer gets saved into a special location. */
3629 if (u
->Save_SP
&& i
== DEPRECATED_FP_REGNUM
)
3632 save_gr
|= (1 << i
);
3634 save_gr
&= ~restart_gr
;
3636 /* Turn the Entry_FR field into a bitmask too. */
3638 for (i
= 12; i
< u
->Entry_FR
+ 12; i
++)
3639 save_fr
|= (1 << i
);
3640 save_fr
&= ~restart_fr
;
3642 /* Loop until we find everything of interest or hit a branch.
3644 For unoptimized GCC code and for any HP CC code this will never ever
3645 examine any user instructions.
3647 For optimzied GCC code we're faced with problems. GCC will schedule
3648 its prologue and make prologue instructions available for delay slot
3649 filling. The end result is user code gets mixed in with the prologue
3650 and a prologue instruction may be in the delay slot of the first branch
3653 Some unexpected things are expected with debugging optimized code, so
3654 we allow this routine to walk past user instructions in optimized
3656 while (save_gr
|| save_fr
|| save_rp
|| save_sp
|| stack_remaining
> 0
3659 unsigned int reg_num
;
3660 unsigned long old_stack_remaining
, old_save_gr
, old_save_fr
;
3661 unsigned long old_save_rp
, old_save_sp
, next_inst
;
3663 /* Save copies of all the triggers so we can compare them later
3665 old_save_gr
= save_gr
;
3666 old_save_fr
= save_fr
;
3667 old_save_rp
= save_rp
;
3668 old_save_sp
= save_sp
;
3669 old_stack_remaining
= stack_remaining
;
3671 status
= target_read_memory (pc
, buf
, 4);
3672 inst
= extract_unsigned_integer (buf
, 4);
3678 /* Note the interesting effects of this instruction. */
3679 stack_remaining
-= prologue_inst_adjust_sp (inst
);
3681 /* There are limited ways to store the return pointer into the
3683 if (inst
== 0x6bc23fd9 || inst
== 0x0fc212c1)
3686 /* These are the only ways we save SP into the stack. At this time
3687 the HP compilers never bother to save SP into the stack. */
3688 if ((inst
& 0xffffc000) == 0x6fc10000
3689 || (inst
& 0xffffc00c) == 0x73c10008)
3692 /* Are we loading some register with an offset from the argument
3694 if ((inst
& 0xffe00000) == 0x37a00000
3695 || (inst
& 0xffffffe0) == 0x081d0240)
3701 /* Account for general and floating-point register saves. */
3702 reg_num
= inst_saves_gr (inst
);
3703 save_gr
&= ~(1 << reg_num
);
3705 /* Ugh. Also account for argument stores into the stack.
3706 Unfortunately args_stored only tells us that some arguments
3707 where stored into the stack. Not how many or what kind!
3709 This is a kludge as on the HP compiler sets this bit and it
3710 never does prologue scheduling. So once we see one, skip past
3711 all of them. We have similar code for the fp arg stores below.
3713 FIXME. Can still die if we have a mix of GR and FR argument
3715 if (reg_num
>= (TARGET_PTR_BIT
== 64 ? 19 : 23) && reg_num
<= 26)
3717 while (reg_num
>= (TARGET_PTR_BIT
== 64 ? 19 : 23) && reg_num
<= 26)
3720 status
= target_read_memory (pc
, buf
, 4);
3721 inst
= extract_unsigned_integer (buf
, 4);
3724 reg_num
= inst_saves_gr (inst
);
3730 reg_num
= inst_saves_fr (inst
);
3731 save_fr
&= ~(1 << reg_num
);
3733 status
= target_read_memory (pc
+ 4, buf
, 4);
3734 next_inst
= extract_unsigned_integer (buf
, 4);
3740 /* We've got to be read to handle the ldo before the fp register
3742 if ((inst
& 0xfc000000) == 0x34000000
3743 && inst_saves_fr (next_inst
) >= 4
3744 && inst_saves_fr (next_inst
) <= (TARGET_PTR_BIT
== 64 ? 11 : 7))
3746 /* So we drop into the code below in a reasonable state. */
3747 reg_num
= inst_saves_fr (next_inst
);
3751 /* Ugh. Also account for argument stores into the stack.
3752 This is a kludge as on the HP compiler sets this bit and it
3753 never does prologue scheduling. So once we see one, skip past
3755 if (reg_num
>= 4 && reg_num
<= (TARGET_PTR_BIT
== 64 ? 11 : 7))
3757 while (reg_num
>= 4 && reg_num
<= (TARGET_PTR_BIT
== 64 ? 11 : 7))
3760 status
= target_read_memory (pc
, buf
, 4);
3761 inst
= extract_unsigned_integer (buf
, 4);
3764 if ((inst
& 0xfc000000) != 0x34000000)
3766 status
= target_read_memory (pc
+ 4, buf
, 4);
3767 next_inst
= extract_unsigned_integer (buf
, 4);
3770 reg_num
= inst_saves_fr (next_inst
);
3776 /* Quit if we hit any kind of branch. This can happen if a prologue
3777 instruction is in the delay slot of the first call/branch. */
3778 if (is_branch (inst
))
3781 /* What a crock. The HP compilers set args_stored even if no
3782 arguments were stored into the stack (boo hiss). This could
3783 cause this code to then skip a bunch of user insns (up to the
3786 To combat this we try to identify when args_stored was bogusly
3787 set and clear it. We only do this when args_stored is nonzero,
3788 all other resources are accounted for, and nothing changed on
3791 && !(save_gr
|| save_fr
|| save_rp
|| save_sp
|| stack_remaining
> 0)
3792 && old_save_gr
== save_gr
&& old_save_fr
== save_fr
3793 && old_save_rp
== save_rp
&& old_save_sp
== save_sp
3794 && old_stack_remaining
== stack_remaining
)
3801 /* We've got a tenative location for the end of the prologue. However
3802 because of limitations in the unwind descriptor mechanism we may
3803 have went too far into user code looking for the save of a register
3804 that does not exist. So, if there registers we expected to be saved
3805 but never were, mask them out and restart.
3807 This should only happen in optimized code, and should be very rare. */
3808 if (save_gr
|| (save_fr
&& !(restart_fr
|| restart_gr
)))
3811 restart_gr
= save_gr
;
3812 restart_fr
= save_fr
;
3820 /* Return the address of the PC after the last prologue instruction if
3821 we can determine it from the debug symbols. Else return zero. */
3824 after_prologue (CORE_ADDR pc
)
3826 struct symtab_and_line sal
;
3827 CORE_ADDR func_addr
, func_end
;
3830 /* If we can not find the symbol in the partial symbol table, then
3831 there is no hope we can determine the function's start address
3833 if (!find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
3836 /* Get the line associated with FUNC_ADDR. */
3837 sal
= find_pc_line (func_addr
, 0);
3839 /* There are only two cases to consider. First, the end of the source line
3840 is within the function bounds. In that case we return the end of the
3841 source line. Second is the end of the source line extends beyond the
3842 bounds of the current function. We need to use the slow code to
3843 examine instructions in that case.
3845 Anything else is simply a bug elsewhere. Fixing it here is absolutely
3846 the wrong thing to do. In fact, it should be entirely possible for this
3847 function to always return zero since the slow instruction scanning code
3848 is supposed to *always* work. If it does not, then it is a bug. */
3849 if (sal
.end
< func_end
)
3855 /* To skip prologues, I use this predicate. Returns either PC itself
3856 if the code at PC does not look like a function prologue; otherwise
3857 returns an address that (if we're lucky) follows the prologue. If
3858 LENIENT, then we must skip everything which is involved in setting
3859 up the frame (it's OK to skip more, just so long as we don't skip
3860 anything which might clobber the registers which are being saved.
3861 Currently we must not skip more on the alpha, but we might the lenient
3865 hppa_skip_prologue (CORE_ADDR pc
)
3869 CORE_ADDR post_prologue_pc
;
3872 /* See if we can determine the end of the prologue via the symbol table.
3873 If so, then return either PC, or the PC after the prologue, whichever
3876 post_prologue_pc
= after_prologue (pc
);
3878 /* If after_prologue returned a useful address, then use it. Else
3879 fall back on the instruction skipping code.
3881 Some folks have claimed this causes problems because the breakpoint
3882 may be the first instruction of the prologue. If that happens, then
3883 the instruction skipping code has a bug that needs to be fixed. */
3884 if (post_prologue_pc
!= 0)
3885 return max (pc
, post_prologue_pc
);
3887 return (skip_prologue_hard_way (pc
));
3890 /* Put here the code to store, into the SAVED_REGS, the addresses of
3891 the saved registers of frame described by FRAME_INFO. This
3892 includes special registers such as pc and fp saved in special ways
3893 in the stack frame. sp is even more special: the address we return
3894 for it IS the sp for the next frame. */
3897 hppa_frame_find_saved_regs (struct frame_info
*frame_info
,
3898 CORE_ADDR frame_saved_regs
[])
3901 struct unwind_table_entry
*u
;
3902 unsigned long inst
, stack_remaining
, save_gr
, save_fr
, save_rp
, save_sp
;
3906 int final_iteration
;
3908 /* Zero out everything. */
3909 memset (frame_saved_regs
, '\0', SIZEOF_FRAME_SAVED_REGS
);
3911 /* Call dummy frames always look the same, so there's no need to
3912 examine the dummy code to determine locations of saved registers;
3913 instead, let find_dummy_frame_regs fill in the correct offsets
3914 for the saved registers. */
3915 if ((get_frame_pc (frame_info
) >= get_frame_base (frame_info
)
3916 && (get_frame_pc (frame_info
)
3917 <= (get_frame_base (frame_info
)
3918 /* A call dummy is sized in words, but it is actually a
3919 series of instructions. Account for that scaling
3921 + ((DEPRECATED_REGISTER_SIZE
/ INSTRUCTION_SIZE
)
3922 * DEPRECATED_CALL_DUMMY_LENGTH
)
3923 /* Similarly we have to account for 64bit wide register
3925 + (32 * DEPRECATED_REGISTER_SIZE
)
3926 /* We always consider FP regs 8 bytes long. */
3927 + (NUM_REGS
- FP0_REGNUM
) * 8
3928 /* Similarly we have to account for 64bit wide register
3930 + (6 * DEPRECATED_REGISTER_SIZE
)))))
3931 find_dummy_frame_regs (frame_info
, frame_saved_regs
);
3933 /* Interrupt handlers are special too. They lay out the register
3934 state in the exact same order as the register numbers in GDB. */
3935 if (pc_in_interrupt_handler (get_frame_pc (frame_info
)))
3937 for (i
= 0; i
< NUM_REGS
; i
++)
3939 /* SP is a little special. */
3941 frame_saved_regs
[SP_REGNUM
]
3942 = read_memory_integer (get_frame_base (frame_info
) + SP_REGNUM
* 4,
3943 TARGET_PTR_BIT
/ 8);
3945 frame_saved_regs
[i
] = get_frame_base (frame_info
) + i
* 4;
3950 #ifdef FRAME_FIND_SAVED_REGS_IN_SIGTRAMP
3951 /* Handle signal handler callers. */
3952 if ((get_frame_type (frame_info
) == SIGTRAMP_FRAME
))
3954 FRAME_FIND_SAVED_REGS_IN_SIGTRAMP (frame_info
, frame_saved_regs
);
3959 /* Get the starting address of the function referred to by the PC
3961 pc
= get_frame_func (frame_info
);
3964 u
= find_unwind_entry (pc
);
3968 /* This is how much of a frame adjustment we need to account for. */
3969 stack_remaining
= u
->Total_frame_size
<< 3;
3971 /* Magic register saves we want to know about. */
3972 save_rp
= u
->Save_RP
;
3973 save_sp
= u
->Save_SP
;
3975 /* Turn the Entry_GR field into a bitmask. */
3977 for (i
= 3; i
< u
->Entry_GR
+ 3; i
++)
3979 /* Frame pointer gets saved into a special location. */
3980 if (u
->Save_SP
&& i
== DEPRECATED_FP_REGNUM
)
3983 save_gr
|= (1 << i
);
3986 /* Turn the Entry_FR field into a bitmask too. */
3988 for (i
= 12; i
< u
->Entry_FR
+ 12; i
++)
3989 save_fr
|= (1 << i
);
3991 /* The frame always represents the value of %sp at entry to the
3992 current function (and is thus equivalent to the "saved" stack
3994 frame_saved_regs
[SP_REGNUM
] = get_frame_base (frame_info
);
3996 /* Loop until we find everything of interest or hit a branch.
3998 For unoptimized GCC code and for any HP CC code this will never ever
3999 examine any user instructions.
4001 For optimized GCC code we're faced with problems. GCC will schedule
4002 its prologue and make prologue instructions available for delay slot
4003 filling. The end result is user code gets mixed in with the prologue
4004 and a prologue instruction may be in the delay slot of the first branch
4007 Some unexpected things are expected with debugging optimized code, so
4008 we allow this routine to walk past user instructions in optimized
4010 final_iteration
= 0;
4011 while ((save_gr
|| save_fr
|| save_rp
|| save_sp
|| stack_remaining
> 0)
4012 && pc
<= get_frame_pc (frame_info
))
4014 status
= target_read_memory (pc
, buf
, 4);
4015 inst
= extract_unsigned_integer (buf
, 4);
4021 /* Note the interesting effects of this instruction. */
4022 stack_remaining
-= prologue_inst_adjust_sp (inst
);
4024 /* There are limited ways to store the return pointer into the
4026 if (inst
== 0x6bc23fd9) /* stw rp,-0x14(sr0,sp) */
4029 frame_saved_regs
[RP_REGNUM
] = get_frame_base (frame_info
) - 20;
4031 else if (inst
== 0x0fc212c1) /* std rp,-0x10(sr0,sp) */
4034 frame_saved_regs
[RP_REGNUM
] = get_frame_base (frame_info
) - 16;
4037 /* Note if we saved SP into the stack. This also happens to indicate
4038 the location of the saved frame pointer. */
4039 if ( (inst
& 0xffffc000) == 0x6fc10000 /* stw,ma r1,N(sr0,sp) */
4040 || (inst
& 0xffffc00c) == 0x73c10008) /* std,ma r1,N(sr0,sp) */
4042 frame_saved_regs
[DEPRECATED_FP_REGNUM
] = get_frame_base (frame_info
);
4046 /* Account for general and floating-point register saves. */
4047 reg
= inst_saves_gr (inst
);
4048 if (reg
>= 3 && reg
<= 18
4049 && (!u
->Save_SP
|| reg
!= DEPRECATED_FP_REGNUM
))
4051 save_gr
&= ~(1 << reg
);
4053 /* stwm with a positive displacement is a *post modify*. */
4054 if ((inst
>> 26) == 0x1b
4055 && extract_14 (inst
) >= 0)
4056 frame_saved_regs
[reg
] = get_frame_base (frame_info
);
4057 /* A std has explicit post_modify forms. */
4058 else if ((inst
& 0xfc00000c0) == 0x70000008)
4059 frame_saved_regs
[reg
] = get_frame_base (frame_info
);
4064 if ((inst
>> 26) == 0x1c)
4065 offset
= (inst
& 0x1 ? -1 << 13 : 0) | (((inst
>> 4) & 0x3ff) << 3);
4066 else if ((inst
>> 26) == 0x03)
4067 offset
= low_sign_extend (inst
& 0x1f, 5);
4069 offset
= extract_14 (inst
);
4071 /* Handle code with and without frame pointers. */
4073 frame_saved_regs
[reg
]
4074 = get_frame_base (frame_info
) + offset
;
4076 frame_saved_regs
[reg
]
4077 = (get_frame_base (frame_info
) + (u
->Total_frame_size
<< 3)
4083 /* GCC handles callee saved FP regs a little differently.
4085 It emits an instruction to put the value of the start of
4086 the FP store area into %r1. It then uses fstds,ma with
4087 a basereg of %r1 for the stores.
4089 HP CC emits them at the current stack pointer modifying
4090 the stack pointer as it stores each register. */
4092 /* ldo X(%r3),%r1 or ldo X(%r30),%r1. */
4093 if ((inst
& 0xffffc000) == 0x34610000
4094 || (inst
& 0xffffc000) == 0x37c10000)
4095 fp_loc
= extract_14 (inst
);
4097 reg
= inst_saves_fr (inst
);
4098 if (reg
>= 12 && reg
<= 21)
4100 /* Note +4 braindamage below is necessary because the FP status
4101 registers are internally 8 registers rather than the expected
4103 save_fr
&= ~(1 << reg
);
4106 /* 1st HP CC FP register store. After this instruction
4107 we've set enough state that the GCC and HPCC code are
4108 both handled in the same manner. */
4109 frame_saved_regs
[reg
+ FP4_REGNUM
+ 4] = get_frame_base (frame_info
);
4114 frame_saved_regs
[reg
+ FP0_REGNUM
+ 4]
4115 = get_frame_base (frame_info
) + fp_loc
;
4120 /* Quit if we hit any kind of branch the previous iteration. */
4121 if (final_iteration
)
4124 /* We want to look precisely one instruction beyond the branch
4125 if we have not found everything yet. */
4126 if (is_branch (inst
))
4127 final_iteration
= 1;
4134 /* XXX - deprecated. This is a compatibility function for targets
4135 that do not yet implement DEPRECATED_FRAME_INIT_SAVED_REGS. */
4136 /* Find the addresses in which registers are saved in FRAME. */
4139 hppa_frame_init_saved_regs (struct frame_info
*frame
)
4141 if (get_frame_saved_regs (frame
) == NULL
)
4142 frame_saved_regs_zalloc (frame
);
4143 hppa_frame_find_saved_regs (frame
, get_frame_saved_regs (frame
));
4146 /* Exception handling support for the HP-UX ANSI C++ compiler.
4147 The compiler (aCC) provides a callback for exception events;
4148 GDB can set a breakpoint on this callback and find out what
4149 exception event has occurred. */
4151 /* The name of the hook to be set to point to the callback function */
4152 static char HP_ACC_EH_notify_hook
[] = "__eh_notify_hook";
4153 /* The name of the function to be used to set the hook value */
4154 static char HP_ACC_EH_set_hook_value
[] = "__eh_set_hook_value";
4155 /* The name of the callback function in end.o */
4156 static char HP_ACC_EH_notify_callback
[] = "__d_eh_notify_callback";
4157 /* Name of function in end.o on which a break is set (called by above) */
4158 static char HP_ACC_EH_break
[] = "__d_eh_break";
4159 /* Name of flag (in end.o) that enables catching throws */
4160 static char HP_ACC_EH_catch_throw
[] = "__d_eh_catch_throw";
4161 /* Name of flag (in end.o) that enables catching catching */
4162 static char HP_ACC_EH_catch_catch
[] = "__d_eh_catch_catch";
4163 /* The enum used by aCC */
4171 /* Is exception-handling support available with this executable? */
4172 static int hp_cxx_exception_support
= 0;
4173 /* Has the initialize function been run? */
4174 int hp_cxx_exception_support_initialized
= 0;
4175 /* Similar to above, but imported from breakpoint.c -- non-target-specific */
4176 extern int exception_support_initialized
;
4177 /* Address of __eh_notify_hook */
4178 static CORE_ADDR eh_notify_hook_addr
= 0;
4179 /* Address of __d_eh_notify_callback */
4180 static CORE_ADDR eh_notify_callback_addr
= 0;
4181 /* Address of __d_eh_break */
4182 static CORE_ADDR eh_break_addr
= 0;
4183 /* Address of __d_eh_catch_catch */
4184 static CORE_ADDR eh_catch_catch_addr
= 0;
4185 /* Address of __d_eh_catch_throw */
4186 static CORE_ADDR eh_catch_throw_addr
= 0;
4187 /* Sal for __d_eh_break */
4188 static struct symtab_and_line
*break_callback_sal
= 0;
4190 /* Code in end.c expects __d_pid to be set in the inferior,
4191 otherwise __d_eh_notify_callback doesn't bother to call
4192 __d_eh_break! So we poke the pid into this symbol
4197 setup_d_pid_in_inferior (void)
4200 struct minimal_symbol
*msymbol
;
4201 char buf
[4]; /* FIXME 32x64? */
4203 /* Slam the pid of the process into __d_pid; failing is only a warning! */
4204 msymbol
= lookup_minimal_symbol ("__d_pid", NULL
, symfile_objfile
);
4205 if (msymbol
== NULL
)
4207 warning ("Unable to find __d_pid symbol in object file.");
4208 warning ("Suggest linking executable with -g (links in /opt/langtools/lib/end.o).");
4212 anaddr
= SYMBOL_VALUE_ADDRESS (msymbol
);
4213 store_unsigned_integer (buf
, 4, PIDGET (inferior_ptid
)); /* FIXME 32x64? */
4214 if (target_write_memory (anaddr
, buf
, 4)) /* FIXME 32x64? */
4216 warning ("Unable to write __d_pid");
4217 warning ("Suggest linking executable with -g (links in /opt/langtools/lib/end.o).");
4223 /* Initialize exception catchpoint support by looking for the
4224 necessary hooks/callbacks in end.o, etc., and set the hook value to
4225 point to the required debug function
4231 initialize_hp_cxx_exception_support (void)
4233 struct symtabs_and_lines sals
;
4234 struct cleanup
*old_chain
;
4235 struct cleanup
*canonical_strings_chain
= NULL
;
4238 char *addr_end
= NULL
;
4239 char **canonical
= (char **) NULL
;
4241 struct symbol
*sym
= NULL
;
4242 struct minimal_symbol
*msym
= NULL
;
4243 struct objfile
*objfile
;
4244 asection
*shlib_info
;
4246 /* Detect and disallow recursion. On HP-UX with aCC, infinite
4247 recursion is a possibility because finding the hook for exception
4248 callbacks involves making a call in the inferior, which means
4249 re-inserting breakpoints which can re-invoke this code */
4251 static int recurse
= 0;
4254 hp_cxx_exception_support_initialized
= 0;
4255 exception_support_initialized
= 0;
4259 hp_cxx_exception_support
= 0;
4261 /* First check if we have seen any HP compiled objects; if not,
4262 it is very unlikely that HP's idiosyncratic callback mechanism
4263 for exception handling debug support will be available!
4264 This will percolate back up to breakpoint.c, where our callers
4265 will decide to try the g++ exception-handling support instead. */
4266 if (!hp_som_som_object_present
)
4269 /* We have a SOM executable with SOM debug info; find the hooks */
4271 /* First look for the notify hook provided by aCC runtime libs */
4272 /* If we find this symbol, we conclude that the executable must
4273 have HP aCC exception support built in. If this symbol is not
4274 found, even though we're a HP SOM-SOM file, we may have been
4275 built with some other compiler (not aCC). This results percolates
4276 back up to our callers in breakpoint.c which can decide to
4277 try the g++ style of exception support instead.
4278 If this symbol is found but the other symbols we require are
4279 not found, there is something weird going on, and g++ support
4280 should *not* be tried as an alternative.
4282 ASSUMPTION: Only HP aCC code will have __eh_notify_hook defined.
4283 ASSUMPTION: HP aCC and g++ modules cannot be linked together. */
4285 /* libCsup has this hook; it'll usually be non-debuggable */
4286 msym
= lookup_minimal_symbol (HP_ACC_EH_notify_hook
, NULL
, NULL
);
4289 eh_notify_hook_addr
= SYMBOL_VALUE_ADDRESS (msym
);
4290 hp_cxx_exception_support
= 1;
4294 warning ("Unable to find exception callback hook (%s).", HP_ACC_EH_notify_hook
);
4295 warning ("Executable may not have been compiled debuggable with HP aCC.");
4296 warning ("GDB will be unable to intercept exception events.");
4297 eh_notify_hook_addr
= 0;
4298 hp_cxx_exception_support
= 0;
4302 /* Next look for the notify callback routine in end.o */
4303 /* This is always available in the SOM symbol dictionary if end.o is linked in */
4304 msym
= lookup_minimal_symbol (HP_ACC_EH_notify_callback
, NULL
, NULL
);
4307 eh_notify_callback_addr
= SYMBOL_VALUE_ADDRESS (msym
);
4308 hp_cxx_exception_support
= 1;
4312 warning ("Unable to find exception callback routine (%s).", HP_ACC_EH_notify_callback
);
4313 warning ("Suggest linking executable with -g (links in /opt/langtools/lib/end.o).");
4314 warning ("GDB will be unable to intercept exception events.");
4315 eh_notify_callback_addr
= 0;
4319 #ifndef GDB_TARGET_IS_HPPA_20W
4320 /* Check whether the executable is dynamically linked or archive bound */
4321 /* With an archive-bound executable we can use the raw addresses we find
4322 for the callback function, etc. without modification. For an executable
4323 with shared libraries, we have to do more work to find the plabel, which
4324 can be the target of a call through $$dyncall from the aCC runtime support
4325 library (libCsup) which is linked shared by default by aCC. */
4326 /* This test below was copied from somsolib.c/somread.c. It may not be a very
4327 reliable one to test that an executable is linked shared. pai/1997-07-18 */
4328 shlib_info
= bfd_get_section_by_name (symfile_objfile
->obfd
, "$SHLIB_INFO$");
4329 if (shlib_info
&& (bfd_section_size (symfile_objfile
->obfd
, shlib_info
) != 0))
4331 /* The minsym we have has the local code address, but that's not the
4332 plabel that can be used by an inter-load-module call. */
4333 /* Find solib handle for main image (which has end.o), and use that
4334 and the min sym as arguments to __d_shl_get() (which does the equivalent
4335 of shl_findsym()) to find the plabel. */
4337 args_for_find_stub args
;
4338 static char message
[] = "Error while finding exception callback hook:\n";
4340 args
.solib_handle
= som_solib_get_solib_by_pc (eh_notify_callback_addr
);
4342 args
.return_val
= 0;
4345 catch_errors (cover_find_stub_with_shl_get
, &args
, message
,
4347 eh_notify_callback_addr
= args
.return_val
;
4350 exception_catchpoints_are_fragile
= 1;
4352 if (!eh_notify_callback_addr
)
4354 /* We can get here either if there is no plabel in the export list
4355 for the main image, or if something strange happened (?) */
4356 warning ("Couldn't find a plabel (indirect function label) for the exception callback.");
4357 warning ("GDB will not be able to intercept exception events.");
4362 exception_catchpoints_are_fragile
= 0;
4365 /* Now, look for the breakpointable routine in end.o */
4366 /* This should also be available in the SOM symbol dict. if end.o linked in */
4367 msym
= lookup_minimal_symbol (HP_ACC_EH_break
, NULL
, NULL
);
4370 eh_break_addr
= SYMBOL_VALUE_ADDRESS (msym
);
4371 hp_cxx_exception_support
= 1;
4375 warning ("Unable to find exception callback routine to set breakpoint (%s).", HP_ACC_EH_break
);
4376 warning ("Suggest linking executable with -g (link in /opt/langtools/lib/end.o).");
4377 warning ("GDB will be unable to intercept exception events.");
4382 /* Next look for the catch enable flag provided in end.o */
4383 sym
= lookup_symbol (HP_ACC_EH_catch_catch
, (struct block
*) NULL
,
4384 VAR_DOMAIN
, 0, (struct symtab
**) NULL
);
4385 if (sym
) /* sometimes present in debug info */
4387 eh_catch_catch_addr
= SYMBOL_VALUE_ADDRESS (sym
);
4388 hp_cxx_exception_support
= 1;
4391 /* otherwise look in SOM symbol dict. */
4393 msym
= lookup_minimal_symbol (HP_ACC_EH_catch_catch
, NULL
, NULL
);
4396 eh_catch_catch_addr
= SYMBOL_VALUE_ADDRESS (msym
);
4397 hp_cxx_exception_support
= 1;
4401 warning ("Unable to enable interception of exception catches.");
4402 warning ("Executable may not have been compiled debuggable with HP aCC.");
4403 warning ("Suggest linking executable with -g (link in /opt/langtools/lib/end.o).");
4408 /* Next look for the catch enable flag provided end.o */
4409 sym
= lookup_symbol (HP_ACC_EH_catch_catch
, (struct block
*) NULL
,
4410 VAR_DOMAIN
, 0, (struct symtab
**) NULL
);
4411 if (sym
) /* sometimes present in debug info */
4413 eh_catch_throw_addr
= SYMBOL_VALUE_ADDRESS (sym
);
4414 hp_cxx_exception_support
= 1;
4417 /* otherwise look in SOM symbol dict. */
4419 msym
= lookup_minimal_symbol (HP_ACC_EH_catch_throw
, NULL
, NULL
);
4422 eh_catch_throw_addr
= SYMBOL_VALUE_ADDRESS (msym
);
4423 hp_cxx_exception_support
= 1;
4427 warning ("Unable to enable interception of exception throws.");
4428 warning ("Executable may not have been compiled debuggable with HP aCC.");
4429 warning ("Suggest linking executable with -g (link in /opt/langtools/lib/end.o).");
4435 hp_cxx_exception_support
= 2; /* everything worked so far */
4436 hp_cxx_exception_support_initialized
= 1;
4437 exception_support_initialized
= 1;
4442 /* Target operation for enabling or disabling interception of
4444 KIND is either EX_EVENT_THROW or EX_EVENT_CATCH
4445 ENABLE is either 0 (disable) or 1 (enable).
4446 Return value is NULL if no support found;
4447 -1 if something went wrong,
4448 or a pointer to a symtab/line struct if the breakpointable
4449 address was found. */
4451 struct symtab_and_line
*
4452 child_enable_exception_callback (enum exception_event_kind kind
, int enable
)
4456 if (!exception_support_initialized
|| !hp_cxx_exception_support_initialized
)
4457 if (!initialize_hp_cxx_exception_support ())
4460 switch (hp_cxx_exception_support
)
4463 /* Assuming no HP support at all */
4466 /* HP support should be present, but something went wrong */
4467 return (struct symtab_and_line
*) -1; /* yuck! */
4468 /* there may be other cases in the future */
4471 /* Set the EH hook to point to the callback routine */
4472 store_unsigned_integer (buf
, 4, enable
? eh_notify_callback_addr
: 0); /* FIXME 32x64 problem */
4473 /* pai: (temp) FIXME should there be a pack operation first? */
4474 if (target_write_memory (eh_notify_hook_addr
, buf
, 4)) /* FIXME 32x64 problem */
4476 warning ("Could not write to target memory for exception event callback.");
4477 warning ("Interception of exception events may not work.");
4478 return (struct symtab_and_line
*) -1;
4482 /* Ensure that __d_pid is set up correctly -- end.c code checks this. :-( */
4483 if (PIDGET (inferior_ptid
) > 0)
4485 if (setup_d_pid_in_inferior ())
4486 return (struct symtab_and_line
*) -1;
4490 warning ("Internal error: Invalid inferior pid? Cannot intercept exception events.");
4491 return (struct symtab_and_line
*) -1;
4497 case EX_EVENT_THROW
:
4498 store_unsigned_integer (buf
, 4, enable
? 1 : 0);
4499 if (target_write_memory (eh_catch_throw_addr
, buf
, 4)) /* FIXME 32x64? */
4501 warning ("Couldn't enable exception throw interception.");
4502 return (struct symtab_and_line
*) -1;
4505 case EX_EVENT_CATCH
:
4506 store_unsigned_integer (buf
, 4, enable
? 1 : 0);
4507 if (target_write_memory (eh_catch_catch_addr
, buf
, 4)) /* FIXME 32x64? */
4509 warning ("Couldn't enable exception catch interception.");
4510 return (struct symtab_and_line
*) -1;
4514 error ("Request to enable unknown or unsupported exception event.");
4517 /* Copy break address into new sal struct, malloc'ing if needed. */
4518 if (!break_callback_sal
)
4520 break_callback_sal
= (struct symtab_and_line
*) xmalloc (sizeof (struct symtab_and_line
));
4522 init_sal (break_callback_sal
);
4523 break_callback_sal
->symtab
= NULL
;
4524 break_callback_sal
->pc
= eh_break_addr
;
4525 break_callback_sal
->line
= 0;
4526 break_callback_sal
->end
= eh_break_addr
;
4528 return break_callback_sal
;
4531 /* Record some information about the current exception event */
4532 static struct exception_event_record current_ex_event
;
4533 /* Convenience struct */
4534 static struct symtab_and_line null_symtab_and_line
=
4537 /* Report current exception event. Returns a pointer to a record
4538 that describes the kind of the event, where it was thrown from,
4539 and where it will be caught. More information may be reported
4541 struct exception_event_record
*
4542 child_get_current_exception_event (void)
4544 CORE_ADDR event_kind
;
4545 CORE_ADDR throw_addr
;
4546 CORE_ADDR catch_addr
;
4547 struct frame_info
*fi
, *curr_frame
;
4550 curr_frame
= get_current_frame ();
4552 return (struct exception_event_record
*) NULL
;
4554 /* Go up one frame to __d_eh_notify_callback, because at the
4555 point when this code is executed, there's garbage in the
4556 arguments of __d_eh_break. */
4557 fi
= find_relative_frame (curr_frame
, &level
);
4559 return (struct exception_event_record
*) NULL
;
4563 /* Read in the arguments */
4564 /* __d_eh_notify_callback() is called with 3 arguments:
4565 1. event kind catch or throw
4566 2. the target address if known
4567 3. a flag -- not sure what this is. pai/1997-07-17 */
4568 event_kind
= read_register (ARG0_REGNUM
);
4569 catch_addr
= read_register (ARG1_REGNUM
);
4571 /* Now go down to a user frame */
4572 /* For a throw, __d_eh_break is called by
4573 __d_eh_notify_callback which is called by
4574 __notify_throw which is called
4576 For a catch, __d_eh_break is called by
4577 __d_eh_notify_callback which is called by
4578 <stackwalking stuff> which is called by
4579 __throw__<stuff> or __rethrow_<stuff> which is called
4581 /* FIXME: Don't use such magic numbers; search for the frames */
4582 level
= (event_kind
== EX_EVENT_THROW
) ? 3 : 4;
4583 fi
= find_relative_frame (curr_frame
, &level
);
4585 return (struct exception_event_record
*) NULL
;
4588 throw_addr
= get_frame_pc (fi
);
4590 /* Go back to original (top) frame */
4591 select_frame (curr_frame
);
4593 current_ex_event
.kind
= (enum exception_event_kind
) event_kind
;
4594 current_ex_event
.throw_sal
= find_pc_line (throw_addr
, 1);
4595 current_ex_event
.catch_sal
= find_pc_line (catch_addr
, 1);
4597 return ¤t_ex_event
;
4600 /* Instead of this nasty cast, add a method pvoid() that prints out a
4601 host VOID data type (remember %p isn't portable). */
4604 hppa_pointer_to_address_hack (void *ptr
)
4606 gdb_assert (sizeof (ptr
) == TYPE_LENGTH (builtin_type_void_data_ptr
));
4607 return POINTER_TO_ADDRESS (builtin_type_void_data_ptr
, &ptr
);
4611 unwind_command (char *exp
, int from_tty
)
4614 struct unwind_table_entry
*u
;
4616 /* If we have an expression, evaluate it and use it as the address. */
4618 if (exp
!= 0 && *exp
!= 0)
4619 address
= parse_and_eval_address (exp
);
4623 u
= find_unwind_entry (address
);
4627 printf_unfiltered ("Can't find unwind table entry for %s\n", exp
);
4631 printf_unfiltered ("unwind_table_entry (0x%s):\n",
4632 paddr_nz (hppa_pointer_to_address_hack (u
)));
4634 printf_unfiltered ("\tregion_start = ");
4635 print_address (u
->region_start
, gdb_stdout
);
4637 printf_unfiltered ("\n\tregion_end = ");
4638 print_address (u
->region_end
, gdb_stdout
);
4640 #define pif(FLD) if (u->FLD) printf_unfiltered (" "#FLD);
4642 printf_unfiltered ("\n\tflags =");
4643 pif (Cannot_unwind
);
4645 pif (Millicode_save_sr0
);
4648 pif (Variable_Frame
);
4649 pif (Separate_Package_Body
);
4650 pif (Frame_Extension_Millicode
);
4651 pif (Stack_Overflow_Check
);
4652 pif (Two_Instruction_SP_Increment
);
4656 pif (Save_MRP_in_frame
);
4657 pif (extn_ptr_defined
);
4658 pif (Cleanup_defined
);
4659 pif (MPE_XL_interrupt_marker
);
4660 pif (HP_UX_interrupt_marker
);
4663 putchar_unfiltered ('\n');
4665 #define pin(FLD) printf_unfiltered ("\t"#FLD" = 0x%x\n", u->FLD);
4667 pin (Region_description
);
4670 pin (Total_frame_size
);
4674 hppa_skip_permanent_breakpoint (void)
4676 /* To step over a breakpoint instruction on the PA takes some
4677 fiddling with the instruction address queue.
4679 When we stop at a breakpoint, the IA queue front (the instruction
4680 we're executing now) points at the breakpoint instruction, and
4681 the IA queue back (the next instruction to execute) points to
4682 whatever instruction we would execute after the breakpoint, if it
4683 were an ordinary instruction. This is the case even if the
4684 breakpoint is in the delay slot of a branch instruction.
4686 Clearly, to step past the breakpoint, we need to set the queue
4687 front to the back. But what do we put in the back? What
4688 instruction comes after that one? Because of the branch delay
4689 slot, the next insn is always at the back + 4. */
4690 write_register (PCOQ_HEAD_REGNUM
, read_register (PCOQ_TAIL_REGNUM
));
4691 write_register (PCSQ_HEAD_REGNUM
, read_register (PCSQ_TAIL_REGNUM
));
4693 write_register (PCOQ_TAIL_REGNUM
, read_register (PCOQ_TAIL_REGNUM
) + 4);
4694 /* We can leave the tail's space the same, since there's no jump. */
4697 /* Copy the function value from VALBUF into the proper location
4698 for a function return.
4700 Called only in the context of the "return" command. */
4703 hppa_store_return_value (struct type
*type
, char *valbuf
)
4705 /* For software floating point, the return value goes into the
4706 integer registers. But we do not have any flag to key this on,
4707 so we always store the value into the integer registers.
4709 If its a float value, then we also store it into the floating
4711 deprecated_write_register_bytes (REGISTER_BYTE (28)
4712 + (TYPE_LENGTH (type
) > 4
4713 ? (8 - TYPE_LENGTH (type
))
4714 : (4 - TYPE_LENGTH (type
))),
4715 valbuf
, TYPE_LENGTH (type
));
4716 if (TYPE_CODE (type
) == TYPE_CODE_FLT
)
4717 deprecated_write_register_bytes (REGISTER_BYTE (FP4_REGNUM
),
4718 valbuf
, TYPE_LENGTH (type
));
4721 /* Copy the function's return value into VALBUF.
4723 This function is called only in the context of "target function calls",
4724 ie. when the debugger forces a function to be called in the child, and
4725 when the debugger forces a fucntion to return prematurely via the
4726 "return" command. */
4729 hppa_extract_return_value (struct type
*type
, char *regbuf
, char *valbuf
)
4731 if (TYPE_CODE (type
) == TYPE_CODE_FLT
)
4733 (char *)regbuf
+ REGISTER_BYTE (FP4_REGNUM
),
4734 TYPE_LENGTH (type
));
4738 + REGISTER_BYTE (28)
4739 + (TYPE_LENGTH (type
) > 4
4740 ? (8 - TYPE_LENGTH (type
))
4741 : (4 - TYPE_LENGTH (type
)))),
4742 TYPE_LENGTH (type
));
4746 hppa_reg_struct_has_addr (int gcc_p
, struct type
*type
)
4748 /* On the PA, any pass-by-value structure > 8 bytes is actually passed
4749 via a pointer regardless of its type or the compiler used. */
4750 return (TYPE_LENGTH (type
) > 8);
4754 hppa_inner_than (CORE_ADDR lhs
, CORE_ADDR rhs
)
4756 /* Stack grows upward */
4761 hppa_stack_align (CORE_ADDR sp
)
4763 /* elz: adjust the quantity to the next highest value which is
4764 64-bit aligned. This is used in valops.c, when the sp is adjusted.
4765 On hppa the sp must always be kept 64-bit aligned */
4766 return ((sp
% 8) ? (sp
+ 7) & -8 : sp
);
4770 hppa_pc_requires_run_before_use (CORE_ADDR pc
)
4772 /* Sometimes we may pluck out a minimal symbol that has a negative address.
4774 An example of this occurs when an a.out is linked against a foo.sl.
4775 The foo.sl defines a global bar(), and the a.out declares a signature
4776 for bar(). However, the a.out doesn't directly call bar(), but passes
4777 its address in another call.
4779 If you have this scenario and attempt to "break bar" before running,
4780 gdb will find a minimal symbol for bar() in the a.out. But that
4781 symbol's address will be negative. What this appears to denote is
4782 an index backwards from the base of the procedure linkage table (PLT)
4783 into the data linkage table (DLT), the end of which is contiguous
4784 with the start of the PLT. This is clearly not a valid address for
4785 us to set a breakpoint on.
4787 Note that one must be careful in how one checks for a negative address.
4788 0xc0000000 is a legitimate address of something in a shared text
4789 segment, for example. Since I don't know what the possible range
4790 is of these "really, truly negative" addresses that come from the
4791 minimal symbols, I'm resorting to the gross hack of checking the
4792 top byte of the address for all 1's. Sigh. */
4794 return (!target_has_stack
&& (pc
& 0xFF000000));
4798 hppa_instruction_nullified (void)
4800 /* brobecker 2002/11/07: Couldn't we use a ULONGEST here? It would
4801 avoid the type cast. I'm leaving it as is for now as I'm doing
4802 semi-mechanical multiarching-related changes. */
4803 const int ipsw
= (int) read_register (IPSW_REGNUM
);
4804 const int flags
= (int) read_register (FLAGS_REGNUM
);
4806 return ((ipsw
& 0x00200000) && !(flags
& 0x2));
4810 hppa_register_raw_size (int reg_nr
)
4812 /* All registers have the same size. */
4813 return DEPRECATED_REGISTER_SIZE
;
4816 /* Index within the register vector of the first byte of the space i
4817 used for register REG_NR. */
4820 hppa_register_byte (int reg_nr
)
4825 /* Return the GDB type object for the "standard" data type of data
4829 hppa_register_virtual_type (int reg_nr
)
4831 if (reg_nr
< FP4_REGNUM
)
4832 return builtin_type_int
;
4834 return builtin_type_float
;
4837 /* Store the address of the place in which to copy the structure the
4838 subroutine will return. This is called from call_function. */
4841 hppa_store_struct_return (CORE_ADDR addr
, CORE_ADDR sp
)
4843 write_register (28, addr
);
4847 hppa_extract_struct_value_address (char *regbuf
)
4849 /* Extract from an array REGBUF containing the (raw) register state
4850 the address in which a function should return its structure value,
4851 as a CORE_ADDR (or an expression that can be used as one). */
4852 /* FIXME: brobecker 2002-12-26.
4853 The current implementation is historical, but we should eventually
4854 implement it in a more robust manner as it relies on the fact that
4855 the address size is equal to the size of an int* _on the host_...
4856 One possible implementation that crossed my mind is to use
4858 return (*(int *)(regbuf
+ REGISTER_BYTE (28)));
4861 /* Return True if REGNUM is not a register available to the user
4862 through ptrace(). */
4865 hppa_cannot_store_register (int regnum
)
4868 || regnum
== PCSQ_HEAD_REGNUM
4869 || (regnum
>= PCSQ_TAIL_REGNUM
&& regnum
< IPSW_REGNUM
)
4870 || (regnum
> IPSW_REGNUM
&& regnum
< FP4_REGNUM
));
4875 hppa_smash_text_address (CORE_ADDR addr
)
4877 /* The low two bits of the PC on the PA contain the privilege level.
4878 Some genius implementing a (non-GCC) compiler apparently decided
4879 this means that "addresses" in a text section therefore include a
4880 privilege level, and thus symbol tables should contain these bits.
4881 This seems like a bonehead thing to do--anyway, it seems to work
4882 for our purposes to just ignore those bits. */
4884 return (addr
&= ~0x3);
4887 /* Get the ith function argument for the current function. */
4889 hppa_fetch_pointer_argument (struct frame_info
*frame
, int argi
,
4893 frame_read_register (frame
, R0_REGNUM
+ 26 - argi
, &addr
);
4897 static struct gdbarch
*
4898 hppa_gdbarch_init (struct gdbarch_info info
, struct gdbarch_list
*arches
)
4900 struct gdbarch
*gdbarch
;
4902 /* Try to determine the ABI of the object we are loading. */
4903 if (info
.abfd
!= NULL
&& info
.osabi
== GDB_OSABI_UNKNOWN
)
4905 /* If it's a SOM file, assume it's HP/UX SOM. */
4906 if (bfd_get_flavour (info
.abfd
) == bfd_target_som_flavour
)
4907 info
.osabi
= GDB_OSABI_HPUX_SOM
;
4910 /* find a candidate among the list of pre-declared architectures. */
4911 arches
= gdbarch_list_lookup_by_info (arches
, &info
);
4913 return (arches
->gdbarch
);
4915 /* If none found, then allocate and initialize one. */
4916 gdbarch
= gdbarch_alloc (&info
, NULL
);
4918 /* Hook in ABI-specific overrides, if they have been registered. */
4919 gdbarch_init_osabi (info
, gdbarch
);
4921 set_gdbarch_reg_struct_has_addr (gdbarch
, hppa_reg_struct_has_addr
);
4922 set_gdbarch_function_start_offset (gdbarch
, 0);
4923 set_gdbarch_skip_prologue (gdbarch
, hppa_skip_prologue
);
4924 set_gdbarch_skip_trampoline_code (gdbarch
, hppa_skip_trampoline_code
);
4925 set_gdbarch_in_solib_call_trampoline (gdbarch
, hppa_in_solib_call_trampoline
);
4926 set_gdbarch_in_solib_return_trampoline (gdbarch
,
4927 hppa_in_solib_return_trampoline
);
4928 set_gdbarch_deprecated_saved_pc_after_call (gdbarch
, hppa_saved_pc_after_call
);
4929 set_gdbarch_inner_than (gdbarch
, hppa_inner_than
);
4930 set_gdbarch_stack_align (gdbarch
, hppa_stack_align
);
4931 set_gdbarch_decr_pc_after_break (gdbarch
, 0);
4932 set_gdbarch_deprecated_register_size (gdbarch
, 4);
4933 set_gdbarch_num_regs (gdbarch
, hppa_num_regs
);
4934 set_gdbarch_deprecated_fp_regnum (gdbarch
, 3);
4935 set_gdbarch_sp_regnum (gdbarch
, 30);
4936 set_gdbarch_fp0_regnum (gdbarch
, 64);
4937 set_gdbarch_pc_regnum (gdbarch
, PCOQ_HEAD_REGNUM
);
4938 set_gdbarch_npc_regnum (gdbarch
, PCOQ_TAIL_REGNUM
);
4939 set_gdbarch_deprecated_register_raw_size (gdbarch
, hppa_register_raw_size
);
4940 set_gdbarch_deprecated_register_bytes (gdbarch
, hppa_num_regs
* 4);
4941 set_gdbarch_deprecated_register_byte (gdbarch
, hppa_register_byte
);
4942 set_gdbarch_deprecated_register_virtual_size (gdbarch
, hppa_register_raw_size
);
4943 set_gdbarch_deprecated_max_register_raw_size (gdbarch
, 4);
4944 set_gdbarch_deprecated_max_register_virtual_size (gdbarch
, 8);
4945 set_gdbarch_deprecated_register_virtual_type (gdbarch
, hppa_register_virtual_type
);
4946 set_gdbarch_deprecated_store_struct_return (gdbarch
, hppa_store_struct_return
);
4947 set_gdbarch_deprecated_extract_return_value (gdbarch
,
4948 hppa_extract_return_value
);
4949 set_gdbarch_use_struct_convention (gdbarch
, hppa_use_struct_convention
);
4950 set_gdbarch_deprecated_store_return_value (gdbarch
, hppa_store_return_value
);
4951 set_gdbarch_deprecated_extract_struct_value_address
4952 (gdbarch
, hppa_extract_struct_value_address
);
4953 set_gdbarch_cannot_store_register (gdbarch
, hppa_cannot_store_register
);
4954 set_gdbarch_deprecated_init_extra_frame_info (gdbarch
, hppa_init_extra_frame_info
);
4955 set_gdbarch_deprecated_frame_chain (gdbarch
, hppa_frame_chain
);
4956 set_gdbarch_deprecated_frame_chain_valid (gdbarch
, hppa_frame_chain_valid
);
4957 set_gdbarch_frameless_function_invocation
4958 (gdbarch
, hppa_frameless_function_invocation
);
4959 set_gdbarch_deprecated_frame_saved_pc (gdbarch
, hppa_frame_saved_pc
);
4960 set_gdbarch_frame_args_skip (gdbarch
, 0);
4961 set_gdbarch_deprecated_push_dummy_frame (gdbarch
, hppa_push_dummy_frame
);
4962 set_gdbarch_deprecated_pop_frame (gdbarch
, hppa_pop_frame
);
4963 set_gdbarch_deprecated_call_dummy_length (gdbarch
, INSTRUCTION_SIZE
* 28);
4964 /* set_gdbarch_deprecated_fix_call_dummy (gdbarch, hppa_fix_call_dummy); */
4965 set_gdbarch_deprecated_push_arguments (gdbarch
, hppa_push_arguments
);
4966 set_gdbarch_smash_text_address (gdbarch
, hppa_smash_text_address
);
4967 set_gdbarch_believe_pcc_promotion (gdbarch
, 1);
4968 set_gdbarch_read_pc (gdbarch
, hppa_target_read_pc
);
4969 set_gdbarch_write_pc (gdbarch
, hppa_target_write_pc
);
4970 set_gdbarch_deprecated_target_read_fp (gdbarch
, hppa_target_read_fp
);
4972 /* Helper for function argument information. */
4973 set_gdbarch_fetch_pointer_argument (gdbarch
, hppa_fetch_pointer_argument
);
4979 hppa_dump_tdep (struct gdbarch
*current_gdbarch
, struct ui_file
*file
)
4981 /* Nothing to print for the moment. */
4985 _initialize_hppa_tdep (void)
4987 struct cmd_list_element
*c
;
4988 void break_at_finish_command (char *arg
, int from_tty
);
4989 void tbreak_at_finish_command (char *arg
, int from_tty
);
4990 void break_at_finish_at_depth_command (char *arg
, int from_tty
);
4992 gdbarch_register (bfd_arch_hppa
, hppa_gdbarch_init
, hppa_dump_tdep
);
4993 deprecated_tm_print_insn
= print_insn_hppa
;
4995 add_cmd ("unwind", class_maintenance
, unwind_command
,
4996 "Print unwind table entry at given address.",
4997 &maintenanceprintlist
);
4999 deprecate_cmd (add_com ("xbreak", class_breakpoint
,
5000 break_at_finish_command
,
5001 concat ("Set breakpoint at procedure exit. \n\
5002 Argument may be function name, or \"*\" and an address.\n\
5003 If function is specified, break at end of code for that function.\n\
5004 If an address is specified, break at the end of the function that contains \n\
5005 that exact address.\n",
5006 "With no arg, uses current execution address of selected stack frame.\n\
5007 This is useful for breaking on return to a stack frame.\n\
5009 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
5011 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL
)), NULL
);
5012 deprecate_cmd (add_com_alias ("xb", "xbreak", class_breakpoint
, 1), NULL
);
5013 deprecate_cmd (add_com_alias ("xbr", "xbreak", class_breakpoint
, 1), NULL
);
5014 deprecate_cmd (add_com_alias ("xbre", "xbreak", class_breakpoint
, 1), NULL
);
5015 deprecate_cmd (add_com_alias ("xbrea", "xbreak", class_breakpoint
, 1), NULL
);
5017 deprecate_cmd (c
= add_com ("txbreak", class_breakpoint
,
5018 tbreak_at_finish_command
,
5019 "Set temporary breakpoint at procedure exit. Either there should\n\
5020 be no argument or the argument must be a depth.\n"), NULL
);
5021 set_cmd_completer (c
, location_completer
);
5024 deprecate_cmd (add_com ("bx", class_breakpoint
,
5025 break_at_finish_at_depth_command
,
5026 "Set breakpoint at procedure exit. Either there should\n\
5027 be no argument or the argument must be a depth.\n"), NULL
);