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 */
41 #include <sys/types.h>
45 #include <sys/param.h>
48 #include <sys/ptrace.h>
49 #include <machine/save_state.h>
51 #ifdef COFF_ENCAPSULATE
52 #include "a.out.encap.h"
56 /*#include <sys/user.h> After a.out.h */
67 /* Some local constants. */
68 static const int hppa_num_regs
= 128;
70 /* To support detection of the pseudo-initial frame
72 #define THREAD_INITIAL_FRAME_SYMBOL "__pthread_exit"
73 #define THREAD_INITIAL_FRAME_SYM_LEN sizeof(THREAD_INITIAL_FRAME_SYMBOL)
75 static int extract_5_load (unsigned int);
77 static unsigned extract_5R_store (unsigned int);
79 static unsigned extract_5r_store (unsigned int);
81 static void find_dummy_frame_regs (struct frame_info
*, CORE_ADDR
*);
83 static int find_proc_framesize (CORE_ADDR
);
85 static int find_return_regnum (CORE_ADDR
);
87 struct unwind_table_entry
*find_unwind_entry (CORE_ADDR
);
89 static int extract_17 (unsigned int);
91 static unsigned deposit_21 (unsigned int, unsigned int);
93 static int extract_21 (unsigned);
95 static unsigned deposit_14 (int, unsigned int);
97 static int extract_14 (unsigned);
99 static void unwind_command (char *, int);
101 static int low_sign_extend (unsigned int, unsigned int);
103 static int sign_extend (unsigned int, unsigned int);
105 static int restore_pc_queue (CORE_ADDR
*);
107 static int hppa_alignof (struct type
*);
109 /* To support multi-threading and stepping. */
110 int hppa_prepare_to_proceed ();
112 static int prologue_inst_adjust_sp (unsigned long);
114 static int is_branch (unsigned long);
116 static int inst_saves_gr (unsigned long);
118 static int inst_saves_fr (unsigned long);
120 static int pc_in_interrupt_handler (CORE_ADDR
);
122 static int pc_in_linker_stub (CORE_ADDR
);
124 static int compare_unwind_entries (const void *, const void *);
126 static void read_unwind_info (struct objfile
*);
128 static void internalize_unwinds (struct objfile
*,
129 struct unwind_table_entry
*,
130 asection
*, unsigned int,
131 unsigned int, CORE_ADDR
);
132 static void pa_print_registers (char *, int, int);
133 static void pa_strcat_registers (char *, int, int, struct ui_file
*);
134 static void pa_register_look_aside (char *, int, long *);
135 static void pa_print_fp_reg (int);
136 static void pa_strcat_fp_reg (int, struct ui_file
*, enum precision_type
);
137 static void record_text_segment_lowaddr (bfd
*, asection
*, void *);
138 /* FIXME: brobecker 2002-11-07: We will likely be able to make the
139 following functions static, once we hppa is partially multiarched. */
140 int hppa_reg_struct_has_addr (int gcc_p
, struct type
*type
);
141 CORE_ADDR
hppa_skip_prologue (CORE_ADDR pc
);
142 CORE_ADDR
hppa_skip_trampoline_code (CORE_ADDR pc
);
143 int hppa_in_solib_call_trampoline (CORE_ADDR pc
, char *name
);
144 int hppa_in_solib_return_trampoline (CORE_ADDR pc
, char *name
);
145 CORE_ADDR
hppa_saved_pc_after_call (struct frame_info
*frame
);
146 int hppa_inner_than (CORE_ADDR lhs
, CORE_ADDR rhs
);
147 CORE_ADDR
hppa_stack_align (CORE_ADDR sp
);
148 int hppa_pc_requires_run_before_use (CORE_ADDR pc
);
149 int hppa_instruction_nullified (void);
150 int hppa_register_raw_size (int reg_nr
);
151 int hppa_register_byte (int reg_nr
);
152 struct type
* hppa_register_virtual_type (int reg_nr
);
153 void hppa_store_struct_return (CORE_ADDR addr
, CORE_ADDR sp
);
154 void hppa_extract_return_value (struct type
*type
, char *regbuf
, char *valbuf
);
155 int hppa_use_struct_convention (int gcc_p
, struct type
*type
);
156 void hppa_store_return_value (struct type
*type
, char *valbuf
);
157 CORE_ADDR
hppa_extract_struct_value_address (char *regbuf
);
158 int hppa_cannot_store_register (int regnum
);
159 void hppa_init_extra_frame_info (int fromleaf
, struct frame_info
*frame
);
160 CORE_ADDR
hppa_frame_chain (struct frame_info
*frame
);
161 int hppa_frame_chain_valid (CORE_ADDR chain
, struct frame_info
*thisframe
);
162 int hppa_frameless_function_invocation (struct frame_info
*frame
);
163 CORE_ADDR
hppa_frame_saved_pc (struct frame_info
*frame
);
164 CORE_ADDR
hppa_frame_args_address (struct frame_info
*fi
);
165 CORE_ADDR
hppa_frame_locals_address (struct frame_info
*fi
);
166 int hppa_frame_num_args (struct frame_info
*frame
);
167 void hppa_push_dummy_frame (void);
168 void hppa_pop_frame (void);
169 CORE_ADDR
hppa_fix_call_dummy (char *dummy
, CORE_ADDR pc
, CORE_ADDR fun
,
170 int nargs
, struct value
**args
,
171 struct type
*type
, int gcc_p
);
172 CORE_ADDR
hppa_push_arguments (int nargs
, struct value
**args
, CORE_ADDR sp
,
173 int struct_return
, CORE_ADDR struct_addr
);
174 CORE_ADDR
hppa_smash_text_address (CORE_ADDR addr
);
175 CORE_ADDR
hppa_target_read_pc (ptid_t ptid
);
176 void hppa_target_write_pc (CORE_ADDR v
, ptid_t ptid
);
177 CORE_ADDR
hppa_target_read_fp (void);
181 struct minimal_symbol
*msym
;
182 CORE_ADDR solib_handle
;
183 CORE_ADDR return_val
;
187 static int cover_find_stub_with_shl_get (void *);
189 static int is_pa_2
= 0; /* False */
191 /* This is declared in symtab.c; set to 1 in hp-symtab-read.c */
192 extern int hp_som_som_object_present
;
194 /* In breakpoint.c */
195 extern int exception_catchpoints_are_fragile
;
197 /* Should call_function allocate stack space for a struct return? */
200 hppa_use_struct_convention (int gcc_p
, struct type
*type
)
202 return (TYPE_LENGTH (type
) > 2 * REGISTER_SIZE
);
206 /* Routines to extract various sized constants out of hppa
209 /* This assumes that no garbage lies outside of the lower bits of
213 sign_extend (unsigned val
, unsigned bits
)
215 return (int) (val
>> (bits
- 1) ? (-1 << bits
) | val
: val
);
218 /* For many immediate values the sign bit is the low bit! */
221 low_sign_extend (unsigned val
, unsigned bits
)
223 return (int) ((val
& 0x1 ? (-1 << (bits
- 1)) : 0) | val
>> 1);
226 /* extract the immediate field from a ld{bhw}s instruction */
229 extract_5_load (unsigned word
)
231 return low_sign_extend (word
>> 16 & MASK_5
, 5);
234 /* extract the immediate field from a break instruction */
237 extract_5r_store (unsigned word
)
239 return (word
& MASK_5
);
242 /* extract the immediate field from a {sr}sm instruction */
245 extract_5R_store (unsigned word
)
247 return (word
>> 16 & MASK_5
);
250 /* extract a 14 bit immediate field */
253 extract_14 (unsigned word
)
255 return low_sign_extend (word
& MASK_14
, 14);
258 /* deposit a 14 bit constant in a word */
261 deposit_14 (int opnd
, unsigned word
)
263 unsigned sign
= (opnd
< 0 ? 1 : 0);
265 return word
| ((unsigned) opnd
<< 1 & MASK_14
) | sign
;
268 /* extract a 21 bit constant */
271 extract_21 (unsigned word
)
277 val
= GET_FIELD (word
, 20, 20);
279 val
|= GET_FIELD (word
, 9, 19);
281 val
|= GET_FIELD (word
, 5, 6);
283 val
|= GET_FIELD (word
, 0, 4);
285 val
|= GET_FIELD (word
, 7, 8);
286 return sign_extend (val
, 21) << 11;
289 /* deposit a 21 bit constant in a word. Although 21 bit constants are
290 usually the top 21 bits of a 32 bit constant, we assume that only
291 the low 21 bits of opnd are relevant */
294 deposit_21 (unsigned opnd
, unsigned word
)
298 val
|= GET_FIELD (opnd
, 11 + 14, 11 + 18);
300 val
|= GET_FIELD (opnd
, 11 + 12, 11 + 13);
302 val
|= GET_FIELD (opnd
, 11 + 19, 11 + 20);
304 val
|= GET_FIELD (opnd
, 11 + 1, 11 + 11);
306 val
|= GET_FIELD (opnd
, 11 + 0, 11 + 0);
310 /* extract a 17 bit constant from branch instructions, returning the
311 19 bit signed value. */
314 extract_17 (unsigned word
)
316 return sign_extend (GET_FIELD (word
, 19, 28) |
317 GET_FIELD (word
, 29, 29) << 10 |
318 GET_FIELD (word
, 11, 15) << 11 |
319 (word
& 0x1) << 16, 17) << 2;
323 /* Compare the start address for two unwind entries returning 1 if
324 the first address is larger than the second, -1 if the second is
325 larger than the first, and zero if they are equal. */
328 compare_unwind_entries (const void *arg1
, const void *arg2
)
330 const struct unwind_table_entry
*a
= arg1
;
331 const struct unwind_table_entry
*b
= arg2
;
333 if (a
->region_start
> b
->region_start
)
335 else if (a
->region_start
< b
->region_start
)
341 static CORE_ADDR low_text_segment_address
;
344 record_text_segment_lowaddr (bfd
*abfd
, asection
*section
, void *ignored
)
346 if (((section
->flags
& (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
))
347 == (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
))
348 && section
->vma
< low_text_segment_address
)
349 low_text_segment_address
= section
->vma
;
353 internalize_unwinds (struct objfile
*objfile
, struct unwind_table_entry
*table
,
354 asection
*section
, unsigned int entries
, unsigned int size
,
355 CORE_ADDR text_offset
)
357 /* We will read the unwind entries into temporary memory, then
358 fill in the actual unwind table. */
363 char *buf
= alloca (size
);
365 low_text_segment_address
= -1;
367 /* If addresses are 64 bits wide, then unwinds are supposed to
368 be segment relative offsets instead of absolute addresses.
370 Note that when loading a shared library (text_offset != 0) the
371 unwinds are already relative to the text_offset that will be
373 if (TARGET_PTR_BIT
== 64 && text_offset
== 0)
375 bfd_map_over_sections (objfile
->obfd
,
376 record_text_segment_lowaddr
, NULL
);
378 /* ?!? Mask off some low bits. Should this instead subtract
379 out the lowest section's filepos or something like that?
380 This looks very hokey to me. */
381 low_text_segment_address
&= ~0xfff;
382 text_offset
+= low_text_segment_address
;
385 bfd_get_section_contents (objfile
->obfd
, section
, buf
, 0, size
);
387 /* Now internalize the information being careful to handle host/target
389 for (i
= 0; i
< entries
; i
++)
391 table
[i
].region_start
= bfd_get_32 (objfile
->obfd
,
393 table
[i
].region_start
+= text_offset
;
395 table
[i
].region_end
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) buf
);
396 table
[i
].region_end
+= text_offset
;
398 tmp
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) buf
);
400 table
[i
].Cannot_unwind
= (tmp
>> 31) & 0x1;
401 table
[i
].Millicode
= (tmp
>> 30) & 0x1;
402 table
[i
].Millicode_save_sr0
= (tmp
>> 29) & 0x1;
403 table
[i
].Region_description
= (tmp
>> 27) & 0x3;
404 table
[i
].reserved1
= (tmp
>> 26) & 0x1;
405 table
[i
].Entry_SR
= (tmp
>> 25) & 0x1;
406 table
[i
].Entry_FR
= (tmp
>> 21) & 0xf;
407 table
[i
].Entry_GR
= (tmp
>> 16) & 0x1f;
408 table
[i
].Args_stored
= (tmp
>> 15) & 0x1;
409 table
[i
].Variable_Frame
= (tmp
>> 14) & 0x1;
410 table
[i
].Separate_Package_Body
= (tmp
>> 13) & 0x1;
411 table
[i
].Frame_Extension_Millicode
= (tmp
>> 12) & 0x1;
412 table
[i
].Stack_Overflow_Check
= (tmp
>> 11) & 0x1;
413 table
[i
].Two_Instruction_SP_Increment
= (tmp
>> 10) & 0x1;
414 table
[i
].Ada_Region
= (tmp
>> 9) & 0x1;
415 table
[i
].cxx_info
= (tmp
>> 8) & 0x1;
416 table
[i
].cxx_try_catch
= (tmp
>> 7) & 0x1;
417 table
[i
].sched_entry_seq
= (tmp
>> 6) & 0x1;
418 table
[i
].reserved2
= (tmp
>> 5) & 0x1;
419 table
[i
].Save_SP
= (tmp
>> 4) & 0x1;
420 table
[i
].Save_RP
= (tmp
>> 3) & 0x1;
421 table
[i
].Save_MRP_in_frame
= (tmp
>> 2) & 0x1;
422 table
[i
].extn_ptr_defined
= (tmp
>> 1) & 0x1;
423 table
[i
].Cleanup_defined
= tmp
& 0x1;
424 tmp
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) buf
);
426 table
[i
].MPE_XL_interrupt_marker
= (tmp
>> 31) & 0x1;
427 table
[i
].HP_UX_interrupt_marker
= (tmp
>> 30) & 0x1;
428 table
[i
].Large_frame
= (tmp
>> 29) & 0x1;
429 table
[i
].Pseudo_SP_Set
= (tmp
>> 28) & 0x1;
430 table
[i
].reserved4
= (tmp
>> 27) & 0x1;
431 table
[i
].Total_frame_size
= tmp
& 0x7ffffff;
433 /* Stub unwinds are handled elsewhere. */
434 table
[i
].stub_unwind
.stub_type
= 0;
435 table
[i
].stub_unwind
.padding
= 0;
440 /* Read in the backtrace information stored in the `$UNWIND_START$' section of
441 the object file. This info is used mainly by find_unwind_entry() to find
442 out the stack frame size and frame pointer used by procedures. We put
443 everything on the psymbol obstack in the objfile so that it automatically
444 gets freed when the objfile is destroyed. */
447 read_unwind_info (struct objfile
*objfile
)
449 asection
*unwind_sec
, *stub_unwind_sec
;
450 unsigned unwind_size
, stub_unwind_size
, total_size
;
451 unsigned index
, unwind_entries
;
452 unsigned stub_entries
, total_entries
;
453 CORE_ADDR text_offset
;
454 struct obj_unwind_info
*ui
;
455 obj_private_data_t
*obj_private
;
457 text_offset
= ANOFFSET (objfile
->section_offsets
, 0);
458 ui
= (struct obj_unwind_info
*) obstack_alloc (&objfile
->psymbol_obstack
,
459 sizeof (struct obj_unwind_info
));
465 /* For reasons unknown the HP PA64 tools generate multiple unwinder
466 sections in a single executable. So we just iterate over every
467 section in the BFD looking for unwinder sections intead of trying
468 to do a lookup with bfd_get_section_by_name.
470 First determine the total size of the unwind tables so that we
471 can allocate memory in a nice big hunk. */
473 for (unwind_sec
= objfile
->obfd
->sections
;
475 unwind_sec
= unwind_sec
->next
)
477 if (strcmp (unwind_sec
->name
, "$UNWIND_START$") == 0
478 || strcmp (unwind_sec
->name
, ".PARISC.unwind") == 0)
480 unwind_size
= bfd_section_size (objfile
->obfd
, unwind_sec
);
481 unwind_entries
= unwind_size
/ UNWIND_ENTRY_SIZE
;
483 total_entries
+= unwind_entries
;
487 /* Now compute the size of the stub unwinds. Note the ELF tools do not
488 use stub unwinds at the curren time. */
489 stub_unwind_sec
= bfd_get_section_by_name (objfile
->obfd
, "$UNWIND_END$");
493 stub_unwind_size
= bfd_section_size (objfile
->obfd
, stub_unwind_sec
);
494 stub_entries
= stub_unwind_size
/ STUB_UNWIND_ENTRY_SIZE
;
498 stub_unwind_size
= 0;
502 /* Compute total number of unwind entries and their total size. */
503 total_entries
+= stub_entries
;
504 total_size
= total_entries
* sizeof (struct unwind_table_entry
);
506 /* Allocate memory for the unwind table. */
507 ui
->table
= (struct unwind_table_entry
*)
508 obstack_alloc (&objfile
->psymbol_obstack
, total_size
);
509 ui
->last
= total_entries
- 1;
511 /* Now read in each unwind section and internalize the standard unwind
514 for (unwind_sec
= objfile
->obfd
->sections
;
516 unwind_sec
= unwind_sec
->next
)
518 if (strcmp (unwind_sec
->name
, "$UNWIND_START$") == 0
519 || strcmp (unwind_sec
->name
, ".PARISC.unwind") == 0)
521 unwind_size
= bfd_section_size (objfile
->obfd
, unwind_sec
);
522 unwind_entries
= unwind_size
/ UNWIND_ENTRY_SIZE
;
524 internalize_unwinds (objfile
, &ui
->table
[index
], unwind_sec
,
525 unwind_entries
, unwind_size
, text_offset
);
526 index
+= unwind_entries
;
530 /* Now read in and internalize the stub unwind entries. */
531 if (stub_unwind_size
> 0)
534 char *buf
= alloca (stub_unwind_size
);
536 /* Read in the stub unwind entries. */
537 bfd_get_section_contents (objfile
->obfd
, stub_unwind_sec
, buf
,
538 0, stub_unwind_size
);
540 /* Now convert them into regular unwind entries. */
541 for (i
= 0; i
< stub_entries
; i
++, index
++)
543 /* Clear out the next unwind entry. */
544 memset (&ui
->table
[index
], 0, sizeof (struct unwind_table_entry
));
546 /* Convert offset & size into region_start and region_end.
547 Stuff away the stub type into "reserved" fields. */
548 ui
->table
[index
].region_start
= bfd_get_32 (objfile
->obfd
,
550 ui
->table
[index
].region_start
+= text_offset
;
552 ui
->table
[index
].stub_unwind
.stub_type
= bfd_get_8 (objfile
->obfd
,
555 ui
->table
[index
].region_end
556 = ui
->table
[index
].region_start
+ 4 *
557 (bfd_get_16 (objfile
->obfd
, (bfd_byte
*) buf
) - 1);
563 /* Unwind table needs to be kept sorted. */
564 qsort (ui
->table
, total_entries
, sizeof (struct unwind_table_entry
),
565 compare_unwind_entries
);
567 /* Keep a pointer to the unwind information. */
568 if (objfile
->obj_private
== NULL
)
570 obj_private
= (obj_private_data_t
*)
571 obstack_alloc (&objfile
->psymbol_obstack
,
572 sizeof (obj_private_data_t
));
573 obj_private
->unwind_info
= NULL
;
574 obj_private
->so_info
= NULL
;
577 objfile
->obj_private
= obj_private
;
579 obj_private
= (obj_private_data_t
*) objfile
->obj_private
;
580 obj_private
->unwind_info
= ui
;
583 /* Lookup the unwind (stack backtrace) info for the given PC. We search all
584 of the objfiles seeking the unwind table entry for this PC. Each objfile
585 contains a sorted list of struct unwind_table_entry. Since we do a binary
586 search of the unwind tables, we depend upon them to be sorted. */
588 struct unwind_table_entry
*
589 find_unwind_entry (CORE_ADDR pc
)
591 int first
, middle
, last
;
592 struct objfile
*objfile
;
594 /* A function at address 0? Not in HP-UX! */
595 if (pc
== (CORE_ADDR
) 0)
598 ALL_OBJFILES (objfile
)
600 struct obj_unwind_info
*ui
;
602 if (objfile
->obj_private
)
603 ui
= ((obj_private_data_t
*) (objfile
->obj_private
))->unwind_info
;
607 read_unwind_info (objfile
);
608 if (objfile
->obj_private
== NULL
)
609 error ("Internal error reading unwind information.");
610 ui
= ((obj_private_data_t
*) (objfile
->obj_private
))->unwind_info
;
613 /* First, check the cache */
616 && pc
>= ui
->cache
->region_start
617 && pc
<= ui
->cache
->region_end
)
620 /* Not in the cache, do a binary search */
625 while (first
<= last
)
627 middle
= (first
+ last
) / 2;
628 if (pc
>= ui
->table
[middle
].region_start
629 && pc
<= ui
->table
[middle
].region_end
)
631 ui
->cache
= &ui
->table
[middle
];
632 return &ui
->table
[middle
];
635 if (pc
< ui
->table
[middle
].region_start
)
640 } /* ALL_OBJFILES() */
644 /* Return the adjustment necessary to make for addresses on the stack
645 as presented by hpread.c.
647 This is necessary because of the stack direction on the PA and the
648 bizarre way in which someone (?) decided they wanted to handle
649 frame pointerless code in GDB. */
651 hpread_adjust_stack_address (CORE_ADDR func_addr
)
653 struct unwind_table_entry
*u
;
655 u
= find_unwind_entry (func_addr
);
659 return u
->Total_frame_size
<< 3;
662 /* Called to determine if PC is in an interrupt handler of some
666 pc_in_interrupt_handler (CORE_ADDR pc
)
668 struct unwind_table_entry
*u
;
669 struct minimal_symbol
*msym_us
;
671 u
= find_unwind_entry (pc
);
675 /* Oh joys. HPUX sets the interrupt bit for _sigreturn even though
676 its frame isn't a pure interrupt frame. Deal with this. */
677 msym_us
= lookup_minimal_symbol_by_pc (pc
);
679 return (u
->HP_UX_interrupt_marker
680 && !PC_IN_SIGTRAMP (pc
, DEPRECATED_SYMBOL_NAME (msym_us
)));
683 /* Called when no unwind descriptor was found for PC. Returns 1 if it
684 appears that PC is in a linker stub.
686 ?!? Need to handle stubs which appear in PA64 code. */
689 pc_in_linker_stub (CORE_ADDR pc
)
691 int found_magic_instruction
= 0;
695 /* If unable to read memory, assume pc is not in a linker stub. */
696 if (target_read_memory (pc
, buf
, 4) != 0)
699 /* We are looking for something like
701 ; $$dyncall jams RP into this special spot in the frame (RP')
702 ; before calling the "call stub"
705 ldsid (rp),r1 ; Get space associated with RP into r1
706 mtsp r1,sp ; Move it into space register 0
707 be,n 0(sr0),rp) ; back to your regularly scheduled program */
709 /* Maximum known linker stub size is 4 instructions. Search forward
710 from the given PC, then backward. */
711 for (i
= 0; i
< 4; i
++)
713 /* If we hit something with an unwind, stop searching this direction. */
715 if (find_unwind_entry (pc
+ i
* 4) != 0)
718 /* Check for ldsid (rp),r1 which is the magic instruction for a
719 return from a cross-space function call. */
720 if (read_memory_integer (pc
+ i
* 4, 4) == 0x004010a1)
722 found_magic_instruction
= 1;
725 /* Add code to handle long call/branch and argument relocation stubs
729 if (found_magic_instruction
!= 0)
732 /* Now look backward. */
733 for (i
= 0; i
< 4; i
++)
735 /* If we hit something with an unwind, stop searching this direction. */
737 if (find_unwind_entry (pc
- i
* 4) != 0)
740 /* Check for ldsid (rp),r1 which is the magic instruction for a
741 return from a cross-space function call. */
742 if (read_memory_integer (pc
- i
* 4, 4) == 0x004010a1)
744 found_magic_instruction
= 1;
747 /* Add code to handle long call/branch and argument relocation stubs
750 return found_magic_instruction
;
754 find_return_regnum (CORE_ADDR pc
)
756 struct unwind_table_entry
*u
;
758 u
= find_unwind_entry (pc
);
769 /* Return size of frame, or -1 if we should use a frame pointer. */
771 find_proc_framesize (CORE_ADDR pc
)
773 struct unwind_table_entry
*u
;
774 struct minimal_symbol
*msym_us
;
776 /* This may indicate a bug in our callers... */
777 if (pc
== (CORE_ADDR
) 0)
780 u
= find_unwind_entry (pc
);
784 if (pc_in_linker_stub (pc
))
785 /* Linker stubs have a zero size frame. */
791 msym_us
= lookup_minimal_symbol_by_pc (pc
);
793 /* If Save_SP is set, and we're not in an interrupt or signal caller,
794 then we have a frame pointer. Use it. */
796 && !pc_in_interrupt_handler (pc
)
798 && !PC_IN_SIGTRAMP (pc
, DEPRECATED_SYMBOL_NAME (msym_us
)))
801 return u
->Total_frame_size
<< 3;
804 /* Return offset from sp at which rp is saved, or 0 if not saved. */
805 static int rp_saved (CORE_ADDR
);
808 rp_saved (CORE_ADDR pc
)
810 struct unwind_table_entry
*u
;
812 /* A function at, and thus a return PC from, address 0? Not in HP-UX! */
813 if (pc
== (CORE_ADDR
) 0)
816 u
= find_unwind_entry (pc
);
820 if (pc_in_linker_stub (pc
))
821 /* This is the so-called RP'. */
828 return (TARGET_PTR_BIT
== 64 ? -16 : -20);
829 else if (u
->stub_unwind
.stub_type
!= 0)
831 switch (u
->stub_unwind
.stub_type
)
836 case PARAMETER_RELOCATION
:
847 hppa_frameless_function_invocation (struct frame_info
*frame
)
849 struct unwind_table_entry
*u
;
851 u
= find_unwind_entry (frame
->pc
);
856 return (u
->Total_frame_size
== 0 && u
->stub_unwind
.stub_type
== 0);
859 /* Immediately after a function call, return the saved pc.
860 Can't go through the frames for this because on some machines
861 the new frame is not set up until the new function executes
862 some instructions. */
865 hppa_saved_pc_after_call (struct frame_info
*frame
)
869 struct unwind_table_entry
*u
;
871 ret_regnum
= find_return_regnum (get_frame_pc (frame
));
872 pc
= read_register (ret_regnum
) & ~0x3;
874 /* If PC is in a linker stub, then we need to dig the address
875 the stub will return to out of the stack. */
876 u
= find_unwind_entry (pc
);
877 if (u
&& u
->stub_unwind
.stub_type
!= 0)
878 return DEPRECATED_FRAME_SAVED_PC (frame
);
884 hppa_frame_saved_pc (struct frame_info
*frame
)
886 CORE_ADDR pc
= get_frame_pc (frame
);
887 struct unwind_table_entry
*u
;
888 CORE_ADDR old_pc
= 0;
889 int spun_around_loop
= 0;
892 /* BSD, HPUX & OSF1 all lay out the hardware state in the same manner
893 at the base of the frame in an interrupt handler. Registers within
894 are saved in the exact same order as GDB numbers registers. How
896 if (pc_in_interrupt_handler (pc
))
897 return read_memory_integer (frame
->frame
+ PC_REGNUM
* 4,
898 TARGET_PTR_BIT
/ 8) & ~0x3;
900 if ((frame
->pc
>= frame
->frame
901 && frame
->pc
<= (frame
->frame
902 /* A call dummy is sized in words, but it is
903 actually a series of instructions. Account
904 for that scaling factor. */
905 + ((REGISTER_SIZE
/ INSTRUCTION_SIZE
)
907 /* Similarly we have to account for 64bit
908 wide register saves. */
909 + (32 * REGISTER_SIZE
)
910 /* We always consider FP regs 8 bytes long. */
911 + (NUM_REGS
- FP0_REGNUM
) * 8
912 /* Similarly we have to account for 64bit
913 wide register saves. */
914 + (6 * REGISTER_SIZE
))))
916 return read_memory_integer ((frame
->frame
917 + (TARGET_PTR_BIT
== 64 ? -16 : -20)),
918 TARGET_PTR_BIT
/ 8) & ~0x3;
921 #ifdef FRAME_SAVED_PC_IN_SIGTRAMP
922 /* Deal with signal handler caller frames too. */
923 if ((get_frame_type (frame
) == SIGTRAMP_FRAME
))
926 FRAME_SAVED_PC_IN_SIGTRAMP (frame
, &rp
);
931 if (hppa_frameless_function_invocation (frame
))
935 ret_regnum
= find_return_regnum (pc
);
937 /* If the next frame is an interrupt frame or a signal
938 handler caller, then we need to look in the saved
939 register area to get the return pointer (the values
940 in the registers may not correspond to anything useful). */
942 && ((get_frame_type (frame
->next
) == SIGTRAMP_FRAME
)
943 || pc_in_interrupt_handler (frame
->next
->pc
)))
945 CORE_ADDR
*saved_regs
;
946 hppa_frame_init_saved_regs (frame
->next
);
947 saved_regs
= get_frame_saved_regs (frame
->next
);
948 if (read_memory_integer (saved_regs
[FLAGS_REGNUM
],
949 TARGET_PTR_BIT
/ 8) & 0x2)
951 pc
= read_memory_integer (saved_regs
[31],
952 TARGET_PTR_BIT
/ 8) & ~0x3;
954 /* Syscalls are really two frames. The syscall stub itself
955 with a return pointer in %rp and the kernel call with
956 a return pointer in %r31. We return the %rp variant
957 if %r31 is the same as frame->pc. */
959 pc
= read_memory_integer (saved_regs
[RP_REGNUM
],
960 TARGET_PTR_BIT
/ 8) & ~0x3;
963 pc
= read_memory_integer (saved_regs
[RP_REGNUM
],
964 TARGET_PTR_BIT
/ 8) & ~0x3;
967 pc
= read_register (ret_regnum
) & ~0x3;
971 spun_around_loop
= 0;
975 rp_offset
= rp_saved (pc
);
977 /* Similar to code in frameless function case. If the next
978 frame is a signal or interrupt handler, then dig the right
979 information out of the saved register info. */
982 && ((get_frame_type (frame
->next
) == SIGTRAMP_FRAME
)
983 || pc_in_interrupt_handler (frame
->next
->pc
)))
985 CORE_ADDR
*saved_regs
;
986 hppa_frame_init_saved_regs (frame
->next
);
987 saved_regs
= get_frame_saved_regs (frame
->next
);
988 if (read_memory_integer (saved_regs
[FLAGS_REGNUM
],
989 TARGET_PTR_BIT
/ 8) & 0x2)
991 pc
= read_memory_integer (saved_regs
[31],
992 TARGET_PTR_BIT
/ 8) & ~0x3;
994 /* Syscalls are really two frames. The syscall stub itself
995 with a return pointer in %rp and the kernel call with
996 a return pointer in %r31. We return the %rp variant
997 if %r31 is the same as frame->pc. */
999 pc
= read_memory_integer (saved_regs
[RP_REGNUM
],
1000 TARGET_PTR_BIT
/ 8) & ~0x3;
1003 pc
= read_memory_integer (saved_regs
[RP_REGNUM
],
1004 TARGET_PTR_BIT
/ 8) & ~0x3;
1006 else if (rp_offset
== 0)
1009 pc
= read_register (RP_REGNUM
) & ~0x3;
1014 pc
= read_memory_integer (frame
->frame
+ rp_offset
,
1015 TARGET_PTR_BIT
/ 8) & ~0x3;
1019 /* If PC is inside a linker stub, then dig out the address the stub
1022 Don't do this for long branch stubs. Why? For some unknown reason
1023 _start is marked as a long branch stub in hpux10. */
1024 u
= find_unwind_entry (pc
);
1025 if (u
&& u
->stub_unwind
.stub_type
!= 0
1026 && u
->stub_unwind
.stub_type
!= LONG_BRANCH
)
1030 /* If this is a dynamic executable, and we're in a signal handler,
1031 then the call chain will eventually point us into the stub for
1032 _sigreturn. Unlike most cases, we'll be pointed to the branch
1033 to the real sigreturn rather than the code after the real branch!.
1035 Else, try to dig the address the stub will return to in the normal
1037 insn
= read_memory_integer (pc
, 4);
1038 if ((insn
& 0xfc00e000) == 0xe8000000)
1039 return (pc
+ extract_17 (insn
) + 8) & ~0x3;
1045 if (spun_around_loop
> 1)
1047 /* We're just about to go around the loop again with
1048 no more hope of success. Die. */
1049 error ("Unable to find return pc for this frame");
1059 /* We need to correct the PC and the FP for the outermost frame when we are
1060 in a system call. */
1063 hppa_init_extra_frame_info (int fromleaf
, struct frame_info
*frame
)
1068 if (frame
->next
&& !fromleaf
)
1071 /* If the next frame represents a frameless function invocation then
1072 we have to do some adjustments that are normally done by
1073 DEPRECATED_FRAME_CHAIN. (DEPRECATED_FRAME_CHAIN is not called in
1077 /* Find the framesize of *this* frame without peeking at the PC
1078 in the current frame structure (it isn't set yet). */
1079 framesize
= find_proc_framesize (DEPRECATED_FRAME_SAVED_PC (get_next_frame (frame
)));
1081 /* Now adjust our base frame accordingly. If we have a frame pointer
1082 use it, else subtract the size of this frame from the current
1083 frame. (we always want frame->frame to point at the lowest address
1085 if (framesize
== -1)
1086 frame
->frame
= TARGET_READ_FP ();
1088 frame
->frame
-= framesize
;
1092 flags
= read_register (FLAGS_REGNUM
);
1093 if (flags
& 2) /* In system call? */
1094 frame
->pc
= read_register (31) & ~0x3;
1096 /* The outermost frame is always derived from PC-framesize
1098 One might think frameless innermost frames should have
1099 a frame->frame that is the same as the parent's frame->frame.
1100 That is wrong; frame->frame in that case should be the *high*
1101 address of the parent's frame. It's complicated as hell to
1102 explain, but the parent *always* creates some stack space for
1103 the child. So the child actually does have a frame of some
1104 sorts, and its base is the high address in its parent's frame. */
1105 framesize
= find_proc_framesize (frame
->pc
);
1106 if (framesize
== -1)
1107 frame
->frame
= TARGET_READ_FP ();
1109 frame
->frame
= read_register (SP_REGNUM
) - framesize
;
1112 /* Given a GDB frame, determine the address of the calling function's
1113 frame. This will be used to create a new GDB frame struct, and
1114 then DEPRECATED_INIT_EXTRA_FRAME_INFO and DEPRECATED_INIT_FRAME_PC
1115 will be called for the new frame.
1117 This may involve searching through prologues for several functions
1118 at boundaries where GCC calls HP C code, or where code which has
1119 a frame pointer calls code without a frame pointer. */
1122 hppa_frame_chain (struct frame_info
*frame
)
1124 int my_framesize
, caller_framesize
;
1125 struct unwind_table_entry
*u
;
1126 CORE_ADDR frame_base
;
1127 struct frame_info
*tmp_frame
;
1129 /* A frame in the current frame list, or zero. */
1130 struct frame_info
*saved_regs_frame
= 0;
1131 /* Where the registers were saved in saved_regs_frame. If
1132 saved_regs_frame is zero, this is garbage. */
1133 CORE_ADDR
*saved_regs
= NULL
;
1135 CORE_ADDR caller_pc
;
1137 struct minimal_symbol
*min_frame_symbol
;
1138 struct symbol
*frame_symbol
;
1139 char *frame_symbol_name
;
1141 /* If this is a threaded application, and we see the
1142 routine "__pthread_exit", treat it as the stack root
1144 min_frame_symbol
= lookup_minimal_symbol_by_pc (frame
->pc
);
1145 frame_symbol
= find_pc_function (frame
->pc
);
1147 if ((min_frame_symbol
!= 0) /* && (frame_symbol == 0) */ )
1149 /* The test above for "no user function name" would defend
1150 against the slim likelihood that a user might define a
1151 routine named "__pthread_exit" and then try to debug it.
1153 If it weren't commented out, and you tried to debug the
1154 pthread library itself, you'd get errors.
1156 So for today, we don't make that check. */
1157 frame_symbol_name
= DEPRECATED_SYMBOL_NAME (min_frame_symbol
);
1158 if (frame_symbol_name
!= 0)
1160 if (0 == strncmp (frame_symbol_name
,
1161 THREAD_INITIAL_FRAME_SYMBOL
,
1162 THREAD_INITIAL_FRAME_SYM_LEN
))
1164 /* Pretend we've reached the bottom of the stack. */
1165 return (CORE_ADDR
) 0;
1168 } /* End of hacky code for threads. */
1170 /* Handle HPUX, BSD, and OSF1 style interrupt frames first. These
1171 are easy; at *sp we have a full save state strucutre which we can
1172 pull the old stack pointer from. Also see frame_saved_pc for
1173 code to dig a saved PC out of the save state structure. */
1174 if (pc_in_interrupt_handler (frame
->pc
))
1175 frame_base
= read_memory_integer (frame
->frame
+ SP_REGNUM
* 4,
1176 TARGET_PTR_BIT
/ 8);
1177 #ifdef FRAME_BASE_BEFORE_SIGTRAMP
1178 else if ((get_frame_type (frame
) == SIGTRAMP_FRAME
))
1180 FRAME_BASE_BEFORE_SIGTRAMP (frame
, &frame_base
);
1184 frame_base
= frame
->frame
;
1186 /* Get frame sizes for the current frame and the frame of the
1188 my_framesize
= find_proc_framesize (frame
->pc
);
1189 caller_pc
= DEPRECATED_FRAME_SAVED_PC (frame
);
1191 /* If we can't determine the caller's PC, then it's not likely we can
1192 really determine anything meaningful about its frame. We'll consider
1193 this to be stack bottom. */
1194 if (caller_pc
== (CORE_ADDR
) 0)
1195 return (CORE_ADDR
) 0;
1197 caller_framesize
= find_proc_framesize (DEPRECATED_FRAME_SAVED_PC (frame
));
1199 /* If caller does not have a frame pointer, then its frame
1200 can be found at current_frame - caller_framesize. */
1201 if (caller_framesize
!= -1)
1203 return frame_base
- caller_framesize
;
1205 /* Both caller and callee have frame pointers and are GCC compiled
1206 (SAVE_SP bit in unwind descriptor is on for both functions.
1207 The previous frame pointer is found at the top of the current frame. */
1208 if (caller_framesize
== -1 && my_framesize
== -1)
1210 return read_memory_integer (frame_base
, TARGET_PTR_BIT
/ 8);
1212 /* Caller has a frame pointer, but callee does not. This is a little
1213 more difficult as GCC and HP C lay out locals and callee register save
1214 areas very differently.
1216 The previous frame pointer could be in a register, or in one of
1217 several areas on the stack.
1219 Walk from the current frame to the innermost frame examining
1220 unwind descriptors to determine if %r3 ever gets saved into the
1221 stack. If so return whatever value got saved into the stack.
1222 If it was never saved in the stack, then the value in %r3 is still
1225 We use information from unwind descriptors to determine if %r3
1226 is saved into the stack (Entry_GR field has this information). */
1228 for (tmp_frame
= frame
; tmp_frame
; tmp_frame
= tmp_frame
->next
)
1230 u
= find_unwind_entry (tmp_frame
->pc
);
1234 /* We could find this information by examining prologues. I don't
1235 think anyone has actually written any tools (not even "strip")
1236 which leave them out of an executable, so maybe this is a moot
1238 /* ??rehrauer: Actually, it's quite possible to stepi your way into
1239 code that doesn't have unwind entries. For example, stepping into
1240 the dynamic linker will give you a PC that has none. Thus, I've
1241 disabled this warning. */
1243 warning ("Unable to find unwind for PC 0x%x -- Help!", tmp_frame
->pc
);
1245 return (CORE_ADDR
) 0;
1249 || (get_frame_type (tmp_frame
) == SIGTRAMP_FRAME
)
1250 || pc_in_interrupt_handler (tmp_frame
->pc
))
1253 /* Entry_GR specifies the number of callee-saved general registers
1254 saved in the stack. It starts at %r3, so %r3 would be 1. */
1255 if (u
->Entry_GR
>= 1)
1257 /* The unwind entry claims that r3 is saved here. However,
1258 in optimized code, GCC often doesn't actually save r3.
1259 We'll discover this if we look at the prologue. */
1260 hppa_frame_init_saved_regs (tmp_frame
);
1261 saved_regs
= get_frame_saved_regs (tmp_frame
);
1262 saved_regs_frame
= tmp_frame
;
1264 /* If we have an address for r3, that's good. */
1265 if (saved_regs
[FP_REGNUM
])
1272 /* We may have walked down the chain into a function with a frame
1275 && !(get_frame_type (tmp_frame
) == SIGTRAMP_FRAME
)
1276 && !pc_in_interrupt_handler (tmp_frame
->pc
))
1278 return read_memory_integer (tmp_frame
->frame
, TARGET_PTR_BIT
/ 8);
1280 /* %r3 was saved somewhere in the stack. Dig it out. */
1285 For optimization purposes many kernels don't have the
1286 callee saved registers into the save_state structure upon
1287 entry into the kernel for a syscall; the optimization
1288 is usually turned off if the process is being traced so
1289 that the debugger can get full register state for the
1292 This scheme works well except for two cases:
1294 * Attaching to a process when the process is in the
1295 kernel performing a system call (debugger can't get
1296 full register state for the inferior process since
1297 the process wasn't being traced when it entered the
1300 * Register state is not complete if the system call
1301 causes the process to core dump.
1304 The following heinous code is an attempt to deal with
1305 the lack of register state in a core dump. It will
1306 fail miserably if the function which performs the
1307 system call has a variable sized stack frame. */
1309 if (tmp_frame
!= saved_regs_frame
)
1311 hppa_frame_init_saved_regs (tmp_frame
);
1312 saved_regs
= get_frame_saved_regs (tmp_frame
);
1315 /* Abominable hack. */
1316 if (current_target
.to_has_execution
== 0
1317 && ((saved_regs
[FLAGS_REGNUM
]
1318 && (read_memory_integer (saved_regs
[FLAGS_REGNUM
],
1321 || (saved_regs
[FLAGS_REGNUM
] == 0
1322 && read_register (FLAGS_REGNUM
) & 0x2)))
1324 u
= find_unwind_entry (DEPRECATED_FRAME_SAVED_PC (frame
));
1327 return read_memory_integer (saved_regs
[FP_REGNUM
],
1328 TARGET_PTR_BIT
/ 8);
1332 return frame_base
- (u
->Total_frame_size
<< 3);
1336 return read_memory_integer (saved_regs
[FP_REGNUM
],
1337 TARGET_PTR_BIT
/ 8);
1342 /* Get the innermost frame. */
1344 while (tmp_frame
->next
!= NULL
)
1345 tmp_frame
= tmp_frame
->next
;
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. See above. */
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
[FP_REGNUM
],
1366 TARGET_PTR_BIT
/ 8);
1370 return frame_base
- (u
->Total_frame_size
<< 3);
1374 /* The value in %r3 was never saved into the stack (thus %r3 still
1375 holds the value of the previous frame pointer). */
1376 return TARGET_READ_FP ();
1381 /* To see if a frame chain is valid, see if the caller looks like it
1382 was compiled with gcc. */
1385 hppa_frame_chain_valid (CORE_ADDR chain
, struct frame_info
*thisframe
)
1387 struct minimal_symbol
*msym_us
;
1388 struct minimal_symbol
*msym_start
;
1389 struct unwind_table_entry
*u
, *next_u
= NULL
;
1390 struct frame_info
*next
;
1392 u
= find_unwind_entry (thisframe
->pc
);
1397 /* We can't just check that the same of msym_us is "_start", because
1398 someone idiotically decided that they were going to make a Ltext_end
1399 symbol with the same address. This Ltext_end symbol is totally
1400 indistinguishable (as nearly as I can tell) from the symbol for a function
1401 which is (legitimately, since it is in the user's namespace)
1402 named Ltext_end, so we can't just ignore it. */
1403 msym_us
= lookup_minimal_symbol_by_pc (DEPRECATED_FRAME_SAVED_PC (thisframe
));
1404 msym_start
= lookup_minimal_symbol ("_start", NULL
, NULL
);
1407 && SYMBOL_VALUE_ADDRESS (msym_us
) == SYMBOL_VALUE_ADDRESS (msym_start
))
1410 /* Grrrr. Some new idiot decided that they don't want _start for the
1411 PRO configurations; $START$ calls main directly.... Deal with it. */
1412 msym_start
= lookup_minimal_symbol ("$START$", NULL
, NULL
);
1415 && SYMBOL_VALUE_ADDRESS (msym_us
) == SYMBOL_VALUE_ADDRESS (msym_start
))
1418 next
= get_next_frame (thisframe
);
1420 next_u
= find_unwind_entry (next
->pc
);
1422 /* If this frame does not save SP, has no stack, isn't a stub,
1423 and doesn't "call" an interrupt routine or signal handler caller,
1424 then its not valid. */
1425 if (u
->Save_SP
|| u
->Total_frame_size
|| u
->stub_unwind
.stub_type
!= 0
1426 || (thisframe
->next
&& (get_frame_type (thisframe
->next
) == SIGTRAMP_FRAME
))
1427 || (next_u
&& next_u
->HP_UX_interrupt_marker
))
1430 if (pc_in_linker_stub (thisframe
->pc
))
1436 /* These functions deal with saving and restoring register state
1437 around a function call in the inferior. They keep the stack
1438 double-word aligned; eventually, on an hp700, the stack will have
1439 to be aligned to a 64-byte boundary. */
1442 hppa_push_dummy_frame (void)
1444 CORE_ADDR sp
, pc
, pcspace
;
1445 register int regnum
;
1446 CORE_ADDR int_buffer
;
1449 pc
= hppa_target_read_pc (inferior_ptid
);
1450 int_buffer
= read_register (FLAGS_REGNUM
);
1451 if (int_buffer
& 0x2)
1453 const unsigned int sid
= (pc
>> 30) & 0x3;
1455 pcspace
= read_register (SR4_REGNUM
);
1457 pcspace
= read_register (SR4_REGNUM
+ 4 + sid
);
1460 pcspace
= read_register (PCSQ_HEAD_REGNUM
);
1462 /* Space for "arguments"; the RP goes in here. */
1463 sp
= read_register (SP_REGNUM
) + 48;
1464 int_buffer
= read_register (RP_REGNUM
) | 0x3;
1466 /* The 32bit and 64bit ABIs save the return pointer into different
1468 if (REGISTER_SIZE
== 8)
1469 write_memory (sp
- 16, (char *) &int_buffer
, REGISTER_SIZE
);
1471 write_memory (sp
- 20, (char *) &int_buffer
, REGISTER_SIZE
);
1473 int_buffer
= TARGET_READ_FP ();
1474 write_memory (sp
, (char *) &int_buffer
, REGISTER_SIZE
);
1476 write_register (FP_REGNUM
, sp
);
1478 sp
+= 2 * REGISTER_SIZE
;
1480 for (regnum
= 1; regnum
< 32; regnum
++)
1481 if (regnum
!= RP_REGNUM
&& regnum
!= FP_REGNUM
)
1482 sp
= push_word (sp
, read_register (regnum
));
1484 /* This is not necessary for the 64bit ABI. In fact it is dangerous. */
1485 if (REGISTER_SIZE
!= 8)
1488 for (regnum
= FP0_REGNUM
; regnum
< NUM_REGS
; regnum
++)
1490 deprecated_read_register_bytes (REGISTER_BYTE (regnum
),
1491 (char *) &freg_buffer
, 8);
1492 sp
= push_bytes (sp
, (char *) &freg_buffer
, 8);
1494 sp
= push_word (sp
, read_register (IPSW_REGNUM
));
1495 sp
= push_word (sp
, read_register (SAR_REGNUM
));
1496 sp
= push_word (sp
, pc
);
1497 sp
= push_word (sp
, pcspace
);
1498 sp
= push_word (sp
, pc
+ 4);
1499 sp
= push_word (sp
, pcspace
);
1500 write_register (SP_REGNUM
, sp
);
1504 find_dummy_frame_regs (struct frame_info
*frame
,
1505 CORE_ADDR frame_saved_regs
[])
1507 CORE_ADDR fp
= frame
->frame
;
1510 /* The 32bit and 64bit ABIs save RP into different locations. */
1511 if (REGISTER_SIZE
== 8)
1512 frame_saved_regs
[RP_REGNUM
] = (fp
- 16) & ~0x3;
1514 frame_saved_regs
[RP_REGNUM
] = (fp
- 20) & ~0x3;
1516 frame_saved_regs
[FP_REGNUM
] = fp
;
1518 frame_saved_regs
[1] = fp
+ (2 * REGISTER_SIZE
);
1520 for (fp
+= 3 * REGISTER_SIZE
, i
= 3; i
< 32; i
++)
1524 frame_saved_regs
[i
] = fp
;
1525 fp
+= REGISTER_SIZE
;
1529 /* This is not necessary or desirable for the 64bit ABI. */
1530 if (REGISTER_SIZE
!= 8)
1533 for (i
= FP0_REGNUM
; i
< NUM_REGS
; i
++, fp
+= 8)
1534 frame_saved_regs
[i
] = fp
;
1536 frame_saved_regs
[IPSW_REGNUM
] = fp
;
1537 frame_saved_regs
[SAR_REGNUM
] = fp
+ REGISTER_SIZE
;
1538 frame_saved_regs
[PCOQ_HEAD_REGNUM
] = fp
+ 2 * REGISTER_SIZE
;
1539 frame_saved_regs
[PCSQ_HEAD_REGNUM
] = fp
+ 3 * REGISTER_SIZE
;
1540 frame_saved_regs
[PCOQ_TAIL_REGNUM
] = fp
+ 4 * REGISTER_SIZE
;
1541 frame_saved_regs
[PCSQ_TAIL_REGNUM
] = fp
+ 5 * REGISTER_SIZE
;
1545 hppa_pop_frame (void)
1547 register struct frame_info
*frame
= get_current_frame ();
1548 register CORE_ADDR fp
, npc
, target_pc
;
1549 register int regnum
;
1553 fp
= get_frame_base (frame
);
1554 hppa_frame_init_saved_regs (frame
);
1555 fsr
= get_frame_saved_regs (frame
);
1557 #ifndef NO_PC_SPACE_QUEUE_RESTORE
1558 if (fsr
[IPSW_REGNUM
]) /* Restoring a call dummy frame */
1559 restore_pc_queue (fsr
);
1562 for (regnum
= 31; regnum
> 0; regnum
--)
1564 write_register (regnum
, read_memory_integer (fsr
[regnum
],
1567 for (regnum
= NUM_REGS
- 1; regnum
>= FP0_REGNUM
; regnum
--)
1570 read_memory (fsr
[regnum
], (char *) &freg_buffer
, 8);
1571 deprecated_write_register_bytes (REGISTER_BYTE (regnum
),
1572 (char *) &freg_buffer
, 8);
1575 if (fsr
[IPSW_REGNUM
])
1576 write_register (IPSW_REGNUM
,
1577 read_memory_integer (fsr
[IPSW_REGNUM
],
1580 if (fsr
[SAR_REGNUM
])
1581 write_register (SAR_REGNUM
,
1582 read_memory_integer (fsr
[SAR_REGNUM
],
1585 /* If the PC was explicitly saved, then just restore it. */
1586 if (fsr
[PCOQ_TAIL_REGNUM
])
1588 npc
= read_memory_integer (fsr
[PCOQ_TAIL_REGNUM
],
1590 write_register (PCOQ_TAIL_REGNUM
, npc
);
1592 /* Else use the value in %rp to set the new PC. */
1595 npc
= read_register (RP_REGNUM
);
1599 write_register (FP_REGNUM
, read_memory_integer (fp
, REGISTER_SIZE
));
1601 if (fsr
[IPSW_REGNUM
]) /* call dummy */
1602 write_register (SP_REGNUM
, fp
- 48);
1604 write_register (SP_REGNUM
, fp
);
1606 /* The PC we just restored may be inside a return trampoline. If so
1607 we want to restart the inferior and run it through the trampoline.
1609 Do this by setting a momentary breakpoint at the location the
1610 trampoline returns to.
1612 Don't skip through the trampoline if we're popping a dummy frame. */
1613 target_pc
= SKIP_TRAMPOLINE_CODE (npc
& ~0x3) & ~0x3;
1614 if (target_pc
&& !fsr
[IPSW_REGNUM
])
1616 struct symtab_and_line sal
;
1617 struct breakpoint
*breakpoint
;
1618 struct cleanup
*old_chain
;
1620 /* Set up our breakpoint. Set it to be silent as the MI code
1621 for "return_command" will print the frame we returned to. */
1622 sal
= find_pc_line (target_pc
, 0);
1624 breakpoint
= set_momentary_breakpoint (sal
, null_frame_id
, bp_finish
);
1625 breakpoint
->silent
= 1;
1627 /* So we can clean things up. */
1628 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
1630 /* Start up the inferior. */
1631 clear_proceed_status ();
1632 proceed_to_finish
= 1;
1633 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 0);
1635 /* Perform our cleanups. */
1636 do_cleanups (old_chain
);
1638 flush_cached_frames ();
1641 /* After returning to a dummy on the stack, restore the instruction
1642 queue space registers. */
1645 restore_pc_queue (CORE_ADDR
*fsr
)
1647 CORE_ADDR pc
= read_pc ();
1648 CORE_ADDR new_pc
= read_memory_integer (fsr
[PCOQ_HEAD_REGNUM
],
1649 TARGET_PTR_BIT
/ 8);
1650 struct target_waitstatus w
;
1653 /* Advance past break instruction in the call dummy. */
1654 write_register (PCOQ_HEAD_REGNUM
, pc
+ 4);
1655 write_register (PCOQ_TAIL_REGNUM
, pc
+ 8);
1657 /* HPUX doesn't let us set the space registers or the space
1658 registers of the PC queue through ptrace. Boo, hiss.
1659 Conveniently, the call dummy has this sequence of instructions
1664 So, load up the registers and single step until we are in the
1667 write_register (21, read_memory_integer (fsr
[PCSQ_HEAD_REGNUM
],
1669 write_register (22, new_pc
);
1671 for (insn_count
= 0; insn_count
< 3; insn_count
++)
1673 /* FIXME: What if the inferior gets a signal right now? Want to
1674 merge this into wait_for_inferior (as a special kind of
1675 watchpoint? By setting a breakpoint at the end? Is there
1676 any other choice? Is there *any* way to do this stuff with
1677 ptrace() or some equivalent?). */
1679 target_wait (inferior_ptid
, &w
);
1681 if (w
.kind
== TARGET_WAITKIND_SIGNALLED
)
1683 stop_signal
= w
.value
.sig
;
1684 terminal_ours_for_output ();
1685 printf_unfiltered ("\nProgram terminated with signal %s, %s.\n",
1686 target_signal_to_name (stop_signal
),
1687 target_signal_to_string (stop_signal
));
1688 gdb_flush (gdb_stdout
);
1692 target_terminal_ours ();
1693 target_fetch_registers (-1);
1698 #ifdef PA20W_CALLING_CONVENTIONS
1700 /* This function pushes a stack frame with arguments as part of the
1701 inferior function calling mechanism.
1703 This is the version for the PA64, in which later arguments appear
1704 at higher addresses. (The stack always grows towards higher
1707 We simply allocate the appropriate amount of stack space and put
1708 arguments into their proper slots. The call dummy code will copy
1709 arguments into registers as needed by the ABI.
1711 This ABI also requires that the caller provide an argument pointer
1712 to the callee, so we do that too. */
1715 hppa_push_arguments (int nargs
, struct value
**args
, CORE_ADDR sp
,
1716 int struct_return
, CORE_ADDR struct_addr
)
1718 /* array of arguments' offsets */
1719 int *offset
= (int *) alloca (nargs
* sizeof (int));
1721 /* array of arguments' lengths: real lengths in bytes, not aligned to
1723 int *lengths
= (int *) alloca (nargs
* sizeof (int));
1725 /* The value of SP as it was passed into this function after
1727 CORE_ADDR orig_sp
= STACK_ALIGN (sp
);
1729 /* The number of stack bytes occupied by the current argument. */
1732 /* The total number of bytes reserved for the arguments. */
1733 int cum_bytes_reserved
= 0;
1735 /* Similarly, but aligned. */
1736 int cum_bytes_aligned
= 0;
1739 /* Iterate over each argument provided by the user. */
1740 for (i
= 0; i
< nargs
; i
++)
1742 struct type
*arg_type
= VALUE_TYPE (args
[i
]);
1744 /* Integral scalar values smaller than a register are padded on
1745 the left. We do this by promoting them to full-width,
1746 although the ABI says to pad them with garbage. */
1747 if (is_integral_type (arg_type
)
1748 && TYPE_LENGTH (arg_type
) < REGISTER_SIZE
)
1750 args
[i
] = value_cast ((TYPE_UNSIGNED (arg_type
)
1751 ? builtin_type_unsigned_long
1752 : builtin_type_long
),
1754 arg_type
= VALUE_TYPE (args
[i
]);
1757 lengths
[i
] = TYPE_LENGTH (arg_type
);
1759 /* Align the size of the argument to the word size for this
1761 bytes_reserved
= (lengths
[i
] + REGISTER_SIZE
- 1) & -REGISTER_SIZE
;
1763 offset
[i
] = cum_bytes_reserved
;
1765 /* Aggregates larger than eight bytes (the only types larger
1766 than eight bytes we have) are aligned on a 16-byte boundary,
1767 possibly padded on the right with garbage. This may leave an
1768 empty word on the stack, and thus an unused register, as per
1770 if (bytes_reserved
> 8)
1772 /* Round up the offset to a multiple of two slots. */
1773 int new_offset
= ((offset
[i
] + 2*REGISTER_SIZE
-1)
1774 & -(2*REGISTER_SIZE
));
1776 /* Note the space we've wasted, if any. */
1777 bytes_reserved
+= new_offset
- offset
[i
];
1778 offset
[i
] = new_offset
;
1781 cum_bytes_reserved
+= bytes_reserved
;
1784 /* CUM_BYTES_RESERVED already accounts for all the arguments
1785 passed by the user. However, the ABIs mandate minimum stack space
1786 allocations for outgoing arguments.
1788 The ABIs also mandate minimum stack alignments which we must
1790 cum_bytes_aligned
= STACK_ALIGN (cum_bytes_reserved
);
1791 sp
+= max (cum_bytes_aligned
, REG_PARM_STACK_SPACE
);
1793 /* Now write each of the args at the proper offset down the stack. */
1794 for (i
= 0; i
< nargs
; i
++)
1795 write_memory (orig_sp
+ offset
[i
], VALUE_CONTENTS (args
[i
]), lengths
[i
]);
1797 /* If a structure has to be returned, set up register 28 to hold its
1800 write_register (28, struct_addr
);
1802 /* For the PA64 we must pass a pointer to the outgoing argument list.
1803 The ABI mandates that the pointer should point to the first byte of
1804 storage beyond the register flushback area.
1806 However, the call dummy expects the outgoing argument pointer to
1807 be passed in register %r4. */
1808 write_register (4, orig_sp
+ REG_PARM_STACK_SPACE
);
1810 /* ?!? This needs further work. We need to set up the global data
1811 pointer for this procedure. This assumes the same global pointer
1812 for every procedure. The call dummy expects the dp value to
1813 be passed in register %r6. */
1814 write_register (6, read_register (27));
1816 /* The stack will have 64 bytes of additional space for a frame marker. */
1822 /* This function pushes a stack frame with arguments as part of the
1823 inferior function calling mechanism.
1825 This is the version of the function for the 32-bit PA machines, in
1826 which later arguments appear at lower addresses. (The stack always
1827 grows towards higher addresses.)
1829 We simply allocate the appropriate amount of stack space and put
1830 arguments into their proper slots. The call dummy code will copy
1831 arguments into registers as needed by the ABI. */
1834 hppa_push_arguments (int nargs
, struct value
**args
, CORE_ADDR sp
,
1835 int struct_return
, CORE_ADDR struct_addr
)
1837 /* array of arguments' offsets */
1838 int *offset
= (int *) alloca (nargs
* sizeof (int));
1840 /* array of arguments' lengths: real lengths in bytes, not aligned to
1842 int *lengths
= (int *) alloca (nargs
* sizeof (int));
1844 /* The number of stack bytes occupied by the current argument. */
1847 /* The total number of bytes reserved for the arguments. */
1848 int cum_bytes_reserved
= 0;
1850 /* Similarly, but aligned. */
1851 int cum_bytes_aligned
= 0;
1854 /* Iterate over each argument provided by the user. */
1855 for (i
= 0; i
< nargs
; i
++)
1857 lengths
[i
] = TYPE_LENGTH (VALUE_TYPE (args
[i
]));
1859 /* Align the size of the argument to the word size for this
1861 bytes_reserved
= (lengths
[i
] + REGISTER_SIZE
- 1) & -REGISTER_SIZE
;
1863 offset
[i
] = (cum_bytes_reserved
1864 + (lengths
[i
] > 4 ? bytes_reserved
: lengths
[i
]));
1866 /* If the argument is a double word argument, then it needs to be
1867 double word aligned. */
1868 if ((bytes_reserved
== 2 * REGISTER_SIZE
)
1869 && (offset
[i
] % 2 * REGISTER_SIZE
))
1872 /* BYTES_RESERVED is already aligned to the word, so we put
1873 the argument at one word more down the stack.
1875 This will leave one empty word on the stack, and one unused
1876 register as mandated by the ABI. */
1877 new_offset
= ((offset
[i
] + 2 * REGISTER_SIZE
- 1)
1878 & -(2 * REGISTER_SIZE
));
1880 if ((new_offset
- offset
[i
]) >= 2 * REGISTER_SIZE
)
1882 bytes_reserved
+= REGISTER_SIZE
;
1883 offset
[i
] += REGISTER_SIZE
;
1887 cum_bytes_reserved
+= bytes_reserved
;
1891 /* CUM_BYTES_RESERVED already accounts for all the arguments passed
1892 by the user. However, the ABI mandates minimum stack space
1893 allocations for outgoing arguments.
1895 The ABI also mandates minimum stack alignments which we must
1897 cum_bytes_aligned
= STACK_ALIGN (cum_bytes_reserved
);
1898 sp
+= max (cum_bytes_aligned
, REG_PARM_STACK_SPACE
);
1900 /* Now write each of the args at the proper offset down the stack.
1901 ?!? We need to promote values to a full register instead of skipping
1902 words in the stack. */
1903 for (i
= 0; i
< nargs
; i
++)
1904 write_memory (sp
- offset
[i
], VALUE_CONTENTS (args
[i
]), lengths
[i
]);
1906 /* If a structure has to be returned, set up register 28 to hold its
1909 write_register (28, struct_addr
);
1911 /* The stack will have 32 bytes of additional space for a frame marker. */
1917 /* elz: this function returns a value which is built looking at the given address.
1918 It is called from call_function_by_hand, in case we need to return a
1919 value which is larger than 64 bits, and it is stored in the stack rather than
1920 in the registers r28 and r29 or fr4.
1921 This function does the same stuff as value_being_returned in values.c, but
1922 gets the value from the stack rather than from the buffer where all the
1923 registers were saved when the function called completed. */
1925 hppa_value_returned_from_stack (register struct type
*valtype
, CORE_ADDR addr
)
1927 register struct value
*val
;
1929 val
= allocate_value (valtype
);
1930 CHECK_TYPEDEF (valtype
);
1931 target_read_memory (addr
, VALUE_CONTENTS_RAW (val
), TYPE_LENGTH (valtype
));
1938 /* elz: Used to lookup a symbol in the shared libraries.
1939 This function calls shl_findsym, indirectly through a
1940 call to __d_shl_get. __d_shl_get is in end.c, which is always
1941 linked in by the hp compilers/linkers.
1942 The call to shl_findsym cannot be made directly because it needs
1943 to be active in target address space.
1944 inputs: - minimal symbol pointer for the function we want to look up
1945 - address in target space of the descriptor for the library
1946 where we want to look the symbol up.
1947 This address is retrieved using the
1948 som_solib_get_solib_by_pc function (somsolib.c).
1949 output: - real address in the library of the function.
1950 note: the handle can be null, in which case shl_findsym will look for
1951 the symbol in all the loaded shared libraries.
1952 files to look at if you need reference on this stuff:
1953 dld.c, dld_shl_findsym.c
1955 man entry for shl_findsym */
1958 find_stub_with_shl_get (struct minimal_symbol
*function
, CORE_ADDR handle
)
1960 struct symbol
*get_sym
, *symbol2
;
1961 struct minimal_symbol
*buff_minsym
, *msymbol
;
1963 struct value
**args
;
1964 struct value
*funcval
;
1967 int x
, namelen
, err_value
, tmp
= -1;
1968 CORE_ADDR endo_buff_addr
, value_return_addr
, errno_return_addr
;
1969 CORE_ADDR stub_addr
;
1972 args
= alloca (sizeof (struct value
*) * 8); /* 6 for the arguments and one null one??? */
1973 funcval
= find_function_in_inferior ("__d_shl_get");
1974 get_sym
= lookup_symbol ("__d_shl_get", NULL
, VAR_NAMESPACE
, NULL
, NULL
);
1975 buff_minsym
= lookup_minimal_symbol ("__buffer", NULL
, NULL
);
1976 msymbol
= lookup_minimal_symbol ("__shldp", NULL
, NULL
);
1977 symbol2
= lookup_symbol ("__shldp", NULL
, VAR_NAMESPACE
, NULL
, NULL
);
1978 endo_buff_addr
= SYMBOL_VALUE_ADDRESS (buff_minsym
);
1979 namelen
= strlen (DEPRECATED_SYMBOL_NAME (function
));
1980 value_return_addr
= endo_buff_addr
+ namelen
;
1981 ftype
= check_typedef (SYMBOL_TYPE (get_sym
));
1984 if ((x
= value_return_addr
% 64) != 0)
1985 value_return_addr
= value_return_addr
+ 64 - x
;
1987 errno_return_addr
= value_return_addr
+ 64;
1990 /* set up stuff needed by __d_shl_get in buffer in end.o */
1992 target_write_memory (endo_buff_addr
, DEPRECATED_SYMBOL_NAME (function
), namelen
);
1994 target_write_memory (value_return_addr
, (char *) &tmp
, 4);
1996 target_write_memory (errno_return_addr
, (char *) &tmp
, 4);
1998 target_write_memory (SYMBOL_VALUE_ADDRESS (msymbol
),
1999 (char *) &handle
, 4);
2001 /* now prepare the arguments for the call */
2003 args
[0] = value_from_longest (TYPE_FIELD_TYPE (ftype
, 0), 12);
2004 args
[1] = value_from_pointer (TYPE_FIELD_TYPE (ftype
, 1), SYMBOL_VALUE_ADDRESS (msymbol
));
2005 args
[2] = value_from_pointer (TYPE_FIELD_TYPE (ftype
, 2), endo_buff_addr
);
2006 args
[3] = value_from_longest (TYPE_FIELD_TYPE (ftype
, 3), TYPE_PROCEDURE
);
2007 args
[4] = value_from_pointer (TYPE_FIELD_TYPE (ftype
, 4), value_return_addr
);
2008 args
[5] = value_from_pointer (TYPE_FIELD_TYPE (ftype
, 5), errno_return_addr
);
2010 /* now call the function */
2012 val
= call_function_by_hand (funcval
, 6, args
);
2014 /* now get the results */
2016 target_read_memory (errno_return_addr
, (char *) &err_value
, sizeof (err_value
));
2018 target_read_memory (value_return_addr
, (char *) &stub_addr
, sizeof (stub_addr
));
2020 error ("call to __d_shl_get failed, error code is %d", err_value
);
2025 /* Cover routine for find_stub_with_shl_get to pass to catch_errors */
2027 cover_find_stub_with_shl_get (void *args_untyped
)
2029 args_for_find_stub
*args
= args_untyped
;
2030 args
->return_val
= find_stub_with_shl_get (args
->msym
, args
->solib_handle
);
2034 /* Insert the specified number of args and function address
2035 into a call sequence of the above form stored at DUMMYNAME.
2037 On the hppa we need to call the stack dummy through $$dyncall.
2038 Therefore our version of FIX_CALL_DUMMY takes an extra argument,
2039 real_pc, which is the location where gdb should start up the
2040 inferior to do the function call.
2042 This has to work across several versions of hpux, bsd, osf1. It has to
2043 work regardless of what compiler was used to build the inferior program.
2044 It should work regardless of whether or not end.o is available. It has
2045 to work even if gdb can not call into the dynamic loader in the inferior
2046 to query it for symbol names and addresses.
2048 Yes, all those cases should work. Luckily code exists to handle most
2049 of them. The complexity is in selecting exactly what scheme should
2050 be used to perform the inferior call.
2052 At the current time this routine is known not to handle cases where
2053 the program was linked with HP's compiler without including end.o.
2055 Please contact Jeff Law (law@cygnus.com) before changing this code. */
2058 hppa_fix_call_dummy (char *dummy
, CORE_ADDR pc
, CORE_ADDR fun
, int nargs
,
2059 struct value
**args
, struct type
*type
, int gcc_p
)
2061 CORE_ADDR dyncall_addr
;
2062 struct minimal_symbol
*msymbol
;
2063 struct minimal_symbol
*trampoline
;
2064 int flags
= read_register (FLAGS_REGNUM
);
2065 struct unwind_table_entry
*u
= NULL
;
2066 CORE_ADDR new_stub
= 0;
2067 CORE_ADDR solib_handle
= 0;
2069 /* Nonzero if we will use GCC's PLT call routine. This routine must be
2070 passed an import stub, not a PLABEL. It is also necessary to set %r19
2071 (the PIC register) before performing the call.
2073 If zero, then we are using __d_plt_call (HP's PLT call routine) or we
2074 are calling the target directly. When using __d_plt_call we want to
2075 use a PLABEL instead of an import stub. */
2076 int using_gcc_plt_call
= 1;
2078 #ifdef GDB_TARGET_IS_HPPA_20W
2079 /* We currently use completely different code for the PA2.0W inferior
2080 function call sequences. This needs to be cleaned up. */
2082 CORE_ADDR pcsqh
, pcsqt
, pcoqh
, pcoqt
, sr5
;
2083 struct target_waitstatus w
;
2087 struct objfile
*objfile
;
2089 /* We can not modify the PC space queues directly, so we start
2090 up the inferior and execute a couple instructions to set the
2091 space queues so that they point to the call dummy in the stack. */
2092 pcsqh
= read_register (PCSQ_HEAD_REGNUM
);
2093 sr5
= read_register (SR5_REGNUM
);
2096 pcoqh
= read_register (PCOQ_HEAD_REGNUM
);
2097 pcoqt
= read_register (PCOQ_TAIL_REGNUM
);
2098 if (target_read_memory (pcoqh
, buf
, 4) != 0)
2099 error ("Couldn't modify space queue\n");
2100 inst1
= extract_unsigned_integer (buf
, 4);
2102 if (target_read_memory (pcoqt
, buf
, 4) != 0)
2103 error ("Couldn't modify space queue\n");
2104 inst2
= extract_unsigned_integer (buf
, 4);
2107 *((int *) buf
) = 0xe820d000;
2108 if (target_write_memory (pcoqh
, buf
, 4) != 0)
2109 error ("Couldn't modify space queue\n");
2112 *((int *) buf
) = 0x08000240;
2113 if (target_write_memory (pcoqt
, buf
, 4) != 0)
2115 *((int *) buf
) = inst1
;
2116 target_write_memory (pcoqh
, buf
, 4);
2117 error ("Couldn't modify space queue\n");
2120 write_register (1, pc
);
2122 /* Single step twice, the BVE instruction will set the space queue
2123 such that it points to the PC value written immediately above
2124 (ie the call dummy). */
2126 target_wait (inferior_ptid
, &w
);
2128 target_wait (inferior_ptid
, &w
);
2130 /* Restore the two instructions at the old PC locations. */
2131 *((int *) buf
) = inst1
;
2132 target_write_memory (pcoqh
, buf
, 4);
2133 *((int *) buf
) = inst2
;
2134 target_write_memory (pcoqt
, buf
, 4);
2137 /* The call dummy wants the ultimate destination address initially
2139 write_register (5, fun
);
2141 /* We need to see if this objfile has a different DP value than our
2142 own (it could be a shared library for example). */
2143 ALL_OBJFILES (objfile
)
2145 struct obj_section
*s
;
2146 obj_private_data_t
*obj_private
;
2148 /* See if FUN is in any section within this shared library. */
2149 for (s
= objfile
->sections
; s
< objfile
->sections_end
; s
++)
2150 if (s
->addr
<= fun
&& fun
< s
->endaddr
)
2153 if (s
>= objfile
->sections_end
)
2156 obj_private
= (obj_private_data_t
*) objfile
->obj_private
;
2158 /* The DP value may be different for each objfile. But within an
2159 objfile each function uses the same dp value. Thus we do not need
2160 to grope around the opd section looking for dp values.
2162 ?!? This is not strictly correct since we may be in a shared library
2163 and want to call back into the main program. To make that case
2164 work correctly we need to set obj_private->dp for the main program's
2165 objfile, then remove this conditional. */
2166 if (obj_private
->dp
)
2167 write_register (27, obj_private
->dp
);
2174 #ifndef GDB_TARGET_IS_HPPA_20W
2175 /* Prefer __gcc_plt_call over the HP supplied routine because
2176 __gcc_plt_call works for any number of arguments. */
2178 if (lookup_minimal_symbol ("__gcc_plt_call", NULL
, NULL
) == NULL
)
2179 using_gcc_plt_call
= 0;
2181 msymbol
= lookup_minimal_symbol ("$$dyncall", NULL
, NULL
);
2182 if (msymbol
== NULL
)
2183 error ("Can't find an address for $$dyncall trampoline");
2185 dyncall_addr
= SYMBOL_VALUE_ADDRESS (msymbol
);
2187 /* FUN could be a procedure label, in which case we have to get
2188 its real address and the value of its GOT/DP if we plan to
2189 call the routine via gcc_plt_call. */
2190 if ((fun
& 0x2) && using_gcc_plt_call
)
2192 /* Get the GOT/DP value for the target function. It's
2193 at *(fun+4). Note the call dummy is *NOT* allowed to
2194 trash %r19 before calling the target function. */
2195 write_register (19, read_memory_integer ((fun
& ~0x3) + 4,
2198 /* Now get the real address for the function we are calling, it's
2200 fun
= (CORE_ADDR
) read_memory_integer (fun
& ~0x3,
2201 TARGET_PTR_BIT
/ 8);
2206 #ifndef GDB_TARGET_IS_PA_ELF
2207 /* FUN could be an export stub, the real address of a function, or
2208 a PLABEL. When using gcc's PLT call routine we must call an import
2209 stub rather than the export stub or real function for lazy binding
2212 If we are using the gcc PLT call routine, then we need to
2213 get the import stub for the target function. */
2214 if (using_gcc_plt_call
&& som_solib_get_got_by_pc (fun
))
2216 struct objfile
*objfile
;
2217 struct minimal_symbol
*funsymbol
, *stub_symbol
;
2218 CORE_ADDR newfun
= 0;
2220 funsymbol
= lookup_minimal_symbol_by_pc (fun
);
2222 error ("Unable to find minimal symbol for target function.\n");
2224 /* Search all the object files for an import symbol with the
2226 ALL_OBJFILES (objfile
)
2229 = lookup_minimal_symbol_solib_trampoline
2230 (DEPRECATED_SYMBOL_NAME (funsymbol
), NULL
, objfile
);
2233 stub_symbol
= lookup_minimal_symbol (DEPRECATED_SYMBOL_NAME (funsymbol
),
2236 /* Found a symbol with the right name. */
2239 struct unwind_table_entry
*u
;
2240 /* It must be a shared library trampoline. */
2241 if (MSYMBOL_TYPE (stub_symbol
) != mst_solib_trampoline
)
2244 /* It must also be an import stub. */
2245 u
= find_unwind_entry (SYMBOL_VALUE (stub_symbol
));
2247 || (u
->stub_unwind
.stub_type
!= IMPORT
2248 #ifdef GDB_NATIVE_HPUX_11
2249 /* Sigh. The hpux 10.20 dynamic linker will blow
2250 chunks if we perform a call to an unbound function
2251 via the IMPORT_SHLIB stub. The hpux 11.00 dynamic
2252 linker will blow chunks if we do not call the
2253 unbound function via the IMPORT_SHLIB stub.
2255 We currently have no way to select bevahior on just
2256 the target. However, we only support HPUX/SOM in
2257 native mode. So we conditinalize on a native
2258 #ifdef. Ugly. Ugly. Ugly */
2259 && u
->stub_unwind
.stub_type
!= IMPORT_SHLIB
2264 /* OK. Looks like the correct import stub. */
2265 newfun
= SYMBOL_VALUE (stub_symbol
);
2268 /* If we found an IMPORT stub, then we want to stop
2269 searching now. If we found an IMPORT_SHLIB, we want
2270 to continue the search in the hopes that we will find
2272 if (u
->stub_unwind
.stub_type
== IMPORT
)
2277 /* Ouch. We did not find an import stub. Make an attempt to
2278 do the right thing instead of just croaking. Most of the
2279 time this will actually work. */
2281 write_register (19, som_solib_get_got_by_pc (fun
));
2283 u
= find_unwind_entry (fun
);
2285 && (u
->stub_unwind
.stub_type
== IMPORT
2286 || u
->stub_unwind
.stub_type
== IMPORT_SHLIB
))
2287 trampoline
= lookup_minimal_symbol ("__gcc_plt_call", NULL
, NULL
);
2289 /* If we found the import stub in the shared library, then we have
2290 to set %r19 before we call the stub. */
2291 if (u
&& u
->stub_unwind
.stub_type
== IMPORT_SHLIB
)
2292 write_register (19, som_solib_get_got_by_pc (fun
));
2297 /* If we are calling into another load module then have sr4export call the
2298 magic __d_plt_call routine which is linked in from end.o.
2300 You can't use _sr4export to make the call as the value in sp-24 will get
2301 fried and you end up returning to the wrong location. You can't call the
2302 target as the code to bind the PLT entry to a function can't return to a
2305 Also, query the dynamic linker in the inferior to provide a suitable
2306 PLABEL for the target function. */
2307 if (!using_gcc_plt_call
)
2311 /* Get a handle for the shared library containing FUN. Given the
2312 handle we can query the shared library for a PLABEL. */
2313 solib_handle
= som_solib_get_solib_by_pc (fun
);
2317 struct minimal_symbol
*fmsymbol
= lookup_minimal_symbol_by_pc (fun
);
2319 trampoline
= lookup_minimal_symbol ("__d_plt_call", NULL
, NULL
);
2321 if (trampoline
== NULL
)
2323 error ("Can't find an address for __d_plt_call or __gcc_plt_call trampoline\nSuggest linking executable with -g or compiling with gcc.");
2326 /* This is where sr4export will jump to. */
2327 new_fun
= SYMBOL_VALUE_ADDRESS (trampoline
);
2329 /* If the function is in a shared library, then call __d_shl_get to
2330 get a PLABEL for the target function. */
2331 new_stub
= find_stub_with_shl_get (fmsymbol
, solib_handle
);
2334 error ("Can't find an import stub for %s", DEPRECATED_SYMBOL_NAME (fmsymbol
));
2336 /* We have to store the address of the stub in __shlib_funcptr. */
2337 msymbol
= lookup_minimal_symbol ("__shlib_funcptr", NULL
,
2338 (struct objfile
*) NULL
);
2340 if (msymbol
== NULL
)
2341 error ("Can't find an address for __shlib_funcptr");
2342 target_write_memory (SYMBOL_VALUE_ADDRESS (msymbol
),
2343 (char *) &new_stub
, 4);
2345 /* We want sr4export to call __d_plt_call, so we claim it is
2346 the final target. Clear trampoline. */
2352 /* Store upper 21 bits of function address into ldil. fun will either be
2353 the final target (most cases) or __d_plt_call when calling into a shared
2354 library and __gcc_plt_call is not available. */
2355 store_unsigned_integer
2356 (&dummy
[FUNC_LDIL_OFFSET
],
2358 deposit_21 (fun
>> 11,
2359 extract_unsigned_integer (&dummy
[FUNC_LDIL_OFFSET
],
2360 INSTRUCTION_SIZE
)));
2362 /* Store lower 11 bits of function address into ldo */
2363 store_unsigned_integer
2364 (&dummy
[FUNC_LDO_OFFSET
],
2366 deposit_14 (fun
& MASK_11
,
2367 extract_unsigned_integer (&dummy
[FUNC_LDO_OFFSET
],
2368 INSTRUCTION_SIZE
)));
2369 #ifdef SR4EXPORT_LDIL_OFFSET
2372 CORE_ADDR trampoline_addr
;
2374 /* We may still need sr4export's address too. */
2376 if (trampoline
== NULL
)
2378 msymbol
= lookup_minimal_symbol ("_sr4export", NULL
, NULL
);
2379 if (msymbol
== NULL
)
2380 error ("Can't find an address for _sr4export trampoline");
2382 trampoline_addr
= SYMBOL_VALUE_ADDRESS (msymbol
);
2385 trampoline_addr
= SYMBOL_VALUE_ADDRESS (trampoline
);
2388 /* Store upper 21 bits of trampoline's address into ldil */
2389 store_unsigned_integer
2390 (&dummy
[SR4EXPORT_LDIL_OFFSET
],
2392 deposit_21 (trampoline_addr
>> 11,
2393 extract_unsigned_integer (&dummy
[SR4EXPORT_LDIL_OFFSET
],
2394 INSTRUCTION_SIZE
)));
2396 /* Store lower 11 bits of trampoline's address into ldo */
2397 store_unsigned_integer
2398 (&dummy
[SR4EXPORT_LDO_OFFSET
],
2400 deposit_14 (trampoline_addr
& MASK_11
,
2401 extract_unsigned_integer (&dummy
[SR4EXPORT_LDO_OFFSET
],
2402 INSTRUCTION_SIZE
)));
2406 write_register (22, pc
);
2408 /* If we are in a syscall, then we should call the stack dummy
2409 directly. $$dyncall is not needed as the kernel sets up the
2410 space id registers properly based on the value in %r31. In
2411 fact calling $$dyncall will not work because the value in %r22
2412 will be clobbered on the syscall exit path.
2414 Similarly if the current PC is in a shared library. Note however,
2415 this scheme won't work if the shared library isn't mapped into
2416 the same space as the stack. */
2419 #ifndef GDB_TARGET_IS_PA_ELF
2420 else if (som_solib_get_got_by_pc (hppa_target_read_pc (inferior_ptid
)))
2424 return dyncall_addr
;
2428 /* If the pid is in a syscall, then the FP register is not readable.
2429 We'll return zero in that case, rather than attempting to read it
2430 and cause a warning. */
2433 hppa_read_fp (int pid
)
2435 int flags
= read_register (FLAGS_REGNUM
);
2439 return (CORE_ADDR
) 0;
2442 /* This is the only site that may directly read_register () the FP
2443 register. All others must use TARGET_READ_FP (). */
2444 return read_register (FP_REGNUM
);
2448 hppa_target_read_fp (void)
2450 return hppa_read_fp (PIDGET (inferior_ptid
));
2453 /* Get the PC from %r31 if currently in a syscall. Also mask out privilege
2457 hppa_target_read_pc (ptid_t ptid
)
2459 int flags
= read_register_pid (FLAGS_REGNUM
, ptid
);
2461 /* The following test does not belong here. It is OS-specific, and belongs
2463 /* Test SS_INSYSCALL */
2465 return read_register_pid (31, ptid
) & ~0x3;
2467 return read_register_pid (PC_REGNUM
, ptid
) & ~0x3;
2470 /* Write out the PC. If currently in a syscall, then also write the new
2471 PC value into %r31. */
2474 hppa_target_write_pc (CORE_ADDR v
, ptid_t ptid
)
2476 int flags
= read_register_pid (FLAGS_REGNUM
, ptid
);
2478 /* The following test does not belong here. It is OS-specific, and belongs
2480 /* If in a syscall, then set %r31. Also make sure to get the
2481 privilege bits set correctly. */
2482 /* Test SS_INSYSCALL */
2484 write_register_pid (31, v
| 0x3, ptid
);
2486 write_register_pid (PC_REGNUM
, v
, ptid
);
2487 write_register_pid (NPC_REGNUM
, v
+ 4, ptid
);
2490 /* return the alignment of a type in bytes. Structures have the maximum
2491 alignment required by their fields. */
2494 hppa_alignof (struct type
*type
)
2496 int max_align
, align
, i
;
2497 CHECK_TYPEDEF (type
);
2498 switch (TYPE_CODE (type
))
2503 return TYPE_LENGTH (type
);
2504 case TYPE_CODE_ARRAY
:
2505 return hppa_alignof (TYPE_FIELD_TYPE (type
, 0));
2506 case TYPE_CODE_STRUCT
:
2507 case TYPE_CODE_UNION
:
2509 for (i
= 0; i
< TYPE_NFIELDS (type
); i
++)
2511 /* Bit fields have no real alignment. */
2512 /* if (!TYPE_FIELD_BITPOS (type, i)) */
2513 if (!TYPE_FIELD_BITSIZE (type
, i
)) /* elz: this should be bitsize */
2515 align
= hppa_alignof (TYPE_FIELD_TYPE (type
, i
));
2516 max_align
= max (max_align
, align
);
2525 /* Print the register regnum, or all registers if regnum is -1 */
2528 pa_do_registers_info (int regnum
, int fpregs
)
2530 char raw_regs
[REGISTER_BYTES
];
2533 /* Make a copy of gdb's save area (may cause actual
2534 reads from the target). */
2535 for (i
= 0; i
< NUM_REGS
; i
++)
2536 frame_register_read (deprecated_selected_frame
, i
, raw_regs
+ REGISTER_BYTE (i
));
2539 pa_print_registers (raw_regs
, regnum
, fpregs
);
2540 else if (regnum
< FP4_REGNUM
)
2544 /* Why is the value not passed through "extract_signed_integer"
2545 as in "pa_print_registers" below? */
2546 pa_register_look_aside (raw_regs
, regnum
, ®_val
[0]);
2550 printf_unfiltered ("%s %lx\n", REGISTER_NAME (regnum
), reg_val
[1]);
2554 /* Fancy % formats to prevent leading zeros. */
2555 if (reg_val
[0] == 0)
2556 printf_unfiltered ("%s %lx\n", REGISTER_NAME (regnum
), reg_val
[1]);
2558 printf_unfiltered ("%s %lx%8.8lx\n", REGISTER_NAME (regnum
),
2559 reg_val
[0], reg_val
[1]);
2563 /* Note that real floating point values only start at
2564 FP4_REGNUM. FP0 and up are just status and error
2565 registers, which have integral (bit) values. */
2566 pa_print_fp_reg (regnum
);
2569 /********** new function ********************/
2571 pa_do_strcat_registers_info (int regnum
, int fpregs
, struct ui_file
*stream
,
2572 enum precision_type precision
)
2574 char raw_regs
[REGISTER_BYTES
];
2577 /* Make a copy of gdb's save area (may cause actual
2578 reads from the target). */
2579 for (i
= 0; i
< NUM_REGS
; i
++)
2580 frame_register_read (deprecated_selected_frame
, i
, raw_regs
+ REGISTER_BYTE (i
));
2583 pa_strcat_registers (raw_regs
, regnum
, fpregs
, stream
);
2585 else if (regnum
< FP4_REGNUM
)
2589 /* Why is the value not passed through "extract_signed_integer"
2590 as in "pa_print_registers" below? */
2591 pa_register_look_aside (raw_regs
, regnum
, ®_val
[0]);
2595 fprintf_unfiltered (stream
, "%s %lx", REGISTER_NAME (regnum
), reg_val
[1]);
2599 /* Fancy % formats to prevent leading zeros. */
2600 if (reg_val
[0] == 0)
2601 fprintf_unfiltered (stream
, "%s %lx", REGISTER_NAME (regnum
),
2604 fprintf_unfiltered (stream
, "%s %lx%8.8lx", REGISTER_NAME (regnum
),
2605 reg_val
[0], reg_val
[1]);
2609 /* Note that real floating point values only start at
2610 FP4_REGNUM. FP0 and up are just status and error
2611 registers, which have integral (bit) values. */
2612 pa_strcat_fp_reg (regnum
, stream
, precision
);
2615 /* If this is a PA2.0 machine, fetch the real 64-bit register
2616 value. Otherwise use the info from gdb's saved register area.
2618 Note that reg_val is really expected to be an array of longs,
2619 with two elements. */
2621 pa_register_look_aside (char *raw_regs
, int regnum
, long *raw_val
)
2623 static int know_which
= 0; /* False */
2626 unsigned int offset
;
2631 char *buf
= alloca (max_register_size (current_gdbarch
));
2636 if (CPU_PA_RISC2_0
== sysconf (_SC_CPU_VERSION
))
2641 know_which
= 1; /* True */
2649 raw_val
[1] = *(long *) (raw_regs
+ REGISTER_BYTE (regnum
));
2653 /* Code below copied from hppah-nat.c, with fixes for wide
2654 registers, using different area of save_state, etc. */
2655 if (regnum
== FLAGS_REGNUM
|| regnum
>= FP0_REGNUM
||
2656 !HAVE_STRUCT_SAVE_STATE_T
|| !HAVE_STRUCT_MEMBER_SS_WIDE
)
2658 /* Use narrow regs area of save_state and default macro. */
2659 offset
= U_REGS_OFFSET
;
2660 regaddr
= register_addr (regnum
, offset
);
2665 /* Use wide regs area, and calculate registers as 8 bytes wide.
2667 We'd like to do this, but current version of "C" doesn't
2670 offset = offsetof(save_state_t, ss_wide);
2672 Note that to avoid "C" doing typed pointer arithmetic, we
2673 have to cast away the type in our offset calculation:
2674 otherwise we get an offset of 1! */
2676 /* NB: save_state_t is not available before HPUX 9.
2677 The ss_wide field is not available previous to HPUX 10.20,
2678 so to avoid compile-time warnings, we only compile this for
2679 PA 2.0 processors. This control path should only be followed
2680 if we're debugging a PA 2.0 processor, so this should not cause
2683 /* #if the following code out so that this file can still be
2684 compiled on older HPUX boxes (< 10.20) which don't have
2685 this structure/structure member. */
2686 #if HAVE_STRUCT_SAVE_STATE_T == 1 && HAVE_STRUCT_MEMBER_SS_WIDE == 1
2689 offset
= ((int) &temp
.ss_wide
) - ((int) &temp
);
2690 regaddr
= offset
+ regnum
* 8;
2695 for (i
= start
; i
< 2; i
++)
2698 raw_val
[i
] = call_ptrace (PT_RUREGS
, PIDGET (inferior_ptid
),
2699 (PTRACE_ARG3_TYPE
) regaddr
, 0);
2702 /* Warning, not error, in case we are attached; sometimes the
2703 kernel doesn't let us at the registers. */
2704 char *err
= safe_strerror (errno
);
2705 char *msg
= alloca (strlen (err
) + 128);
2706 sprintf (msg
, "reading register %s: %s", REGISTER_NAME (regnum
), err
);
2711 regaddr
+= sizeof (long);
2714 if (regnum
== PCOQ_HEAD_REGNUM
|| regnum
== PCOQ_TAIL_REGNUM
)
2715 raw_val
[1] &= ~0x3; /* I think we're masking out space bits */
2721 /* "Info all-reg" command */
2724 pa_print_registers (char *raw_regs
, int regnum
, int fpregs
)
2727 /* Alas, we are compiled so that "long long" is 32 bits */
2730 int rows
= 48, columns
= 2;
2732 for (i
= 0; i
< rows
; i
++)
2734 for (j
= 0; j
< columns
; j
++)
2736 /* We display registers in column-major order. */
2737 int regnum
= i
+ j
* rows
;
2739 /* Q: Why is the value passed through "extract_signed_integer",
2740 while above, in "pa_do_registers_info" it isn't?
2742 pa_register_look_aside (raw_regs
, regnum
, &raw_val
[0]);
2744 /* Even fancier % formats to prevent leading zeros
2745 and still maintain the output in columns. */
2748 /* Being big-endian, on this machine the low bits
2749 (the ones we want to look at) are in the second longword. */
2750 long_val
= extract_signed_integer (&raw_val
[1], 4);
2751 printf_filtered ("%10.10s: %8lx ",
2752 REGISTER_NAME (regnum
), long_val
);
2756 /* raw_val = extract_signed_integer(&raw_val, 8); */
2757 if (raw_val
[0] == 0)
2758 printf_filtered ("%10.10s: %8lx ",
2759 REGISTER_NAME (regnum
), raw_val
[1]);
2761 printf_filtered ("%10.10s: %8lx%8.8lx ",
2762 REGISTER_NAME (regnum
),
2763 raw_val
[0], raw_val
[1]);
2766 printf_unfiltered ("\n");
2770 for (i
= FP4_REGNUM
; i
< NUM_REGS
; i
++) /* FP4_REGNUM == 72 */
2771 pa_print_fp_reg (i
);
2774 /************* new function ******************/
2776 pa_strcat_registers (char *raw_regs
, int regnum
, int fpregs
,
2777 struct ui_file
*stream
)
2780 long raw_val
[2]; /* Alas, we are compiled so that "long long" is 32 bits */
2782 enum precision_type precision
;
2784 precision
= unspecified_precision
;
2786 for (i
= 0; i
< 18; i
++)
2788 for (j
= 0; j
< 4; j
++)
2790 /* Q: Why is the value passed through "extract_signed_integer",
2791 while above, in "pa_do_registers_info" it isn't?
2793 pa_register_look_aside (raw_regs
, i
+ (j
* 18), &raw_val
[0]);
2795 /* Even fancier % formats to prevent leading zeros
2796 and still maintain the output in columns. */
2799 /* Being big-endian, on this machine the low bits
2800 (the ones we want to look at) are in the second longword. */
2801 long_val
= extract_signed_integer (&raw_val
[1], 4);
2802 fprintf_filtered (stream
, "%8.8s: %8lx ",
2803 REGISTER_NAME (i
+ (j
* 18)), long_val
);
2807 /* raw_val = extract_signed_integer(&raw_val, 8); */
2808 if (raw_val
[0] == 0)
2809 fprintf_filtered (stream
, "%8.8s: %8lx ",
2810 REGISTER_NAME (i
+ (j
* 18)), raw_val
[1]);
2812 fprintf_filtered (stream
, "%8.8s: %8lx%8.8lx ",
2813 REGISTER_NAME (i
+ (j
* 18)), raw_val
[0],
2817 fprintf_unfiltered (stream
, "\n");
2821 for (i
= FP4_REGNUM
; i
< NUM_REGS
; i
++) /* FP4_REGNUM == 72 */
2822 pa_strcat_fp_reg (i
, stream
, precision
);
2826 pa_print_fp_reg (int i
)
2828 char *raw_buffer
= alloca (max_register_size (current_gdbarch
));
2829 char *virtual_buffer
= alloca (max_register_size (current_gdbarch
));
2831 /* Get 32bits of data. */
2832 frame_register_read (deprecated_selected_frame
, i
, raw_buffer
);
2834 /* Put it in the buffer. No conversions are ever necessary. */
2835 memcpy (virtual_buffer
, raw_buffer
, REGISTER_RAW_SIZE (i
));
2837 fputs_filtered (REGISTER_NAME (i
), gdb_stdout
);
2838 print_spaces_filtered (8 - strlen (REGISTER_NAME (i
)), gdb_stdout
);
2839 fputs_filtered ("(single precision) ", gdb_stdout
);
2841 val_print (REGISTER_VIRTUAL_TYPE (i
), virtual_buffer
, 0, 0, gdb_stdout
, 0,
2842 1, 0, Val_pretty_default
);
2843 printf_filtered ("\n");
2845 /* If "i" is even, then this register can also be a double-precision
2846 FP register. Dump it out as such. */
2849 /* Get the data in raw format for the 2nd half. */
2850 frame_register_read (deprecated_selected_frame
, i
+ 1, raw_buffer
);
2852 /* Copy it into the appropriate part of the virtual buffer. */
2853 memcpy (virtual_buffer
+ REGISTER_RAW_SIZE (i
), raw_buffer
,
2854 REGISTER_RAW_SIZE (i
));
2856 /* Dump it as a double. */
2857 fputs_filtered (REGISTER_NAME (i
), gdb_stdout
);
2858 print_spaces_filtered (8 - strlen (REGISTER_NAME (i
)), gdb_stdout
);
2859 fputs_filtered ("(double precision) ", gdb_stdout
);
2861 val_print (builtin_type_double
, virtual_buffer
, 0, 0, gdb_stdout
, 0,
2862 1, 0, Val_pretty_default
);
2863 printf_filtered ("\n");
2867 /*************** new function ***********************/
2869 pa_strcat_fp_reg (int i
, struct ui_file
*stream
, enum precision_type precision
)
2871 char *raw_buffer
= alloca (max_register_size (current_gdbarch
));
2872 char *virtual_buffer
= alloca (max_register_size (current_gdbarch
));
2874 fputs_filtered (REGISTER_NAME (i
), stream
);
2875 print_spaces_filtered (8 - strlen (REGISTER_NAME (i
)), stream
);
2877 /* Get 32bits of data. */
2878 frame_register_read (deprecated_selected_frame
, i
, raw_buffer
);
2880 /* Put it in the buffer. No conversions are ever necessary. */
2881 memcpy (virtual_buffer
, raw_buffer
, REGISTER_RAW_SIZE (i
));
2883 if (precision
== double_precision
&& (i
% 2) == 0)
2886 char *raw_buf
= alloca (max_register_size (current_gdbarch
));
2888 /* Get the data in raw format for the 2nd half. */
2889 frame_register_read (deprecated_selected_frame
, i
+ 1, raw_buf
);
2891 /* Copy it into the appropriate part of the virtual buffer. */
2892 memcpy (virtual_buffer
+ REGISTER_RAW_SIZE (i
), raw_buf
, REGISTER_RAW_SIZE (i
));
2894 val_print (builtin_type_double
, virtual_buffer
, 0, 0, stream
, 0,
2895 1, 0, Val_pretty_default
);
2900 val_print (REGISTER_VIRTUAL_TYPE (i
), virtual_buffer
, 0, 0, stream
, 0,
2901 1, 0, Val_pretty_default
);
2906 /* Return one if PC is in the call path of a trampoline, else return zero.
2908 Note we return one for *any* call trampoline (long-call, arg-reloc), not
2909 just shared library trampolines (import, export). */
2912 hppa_in_solib_call_trampoline (CORE_ADDR pc
, char *name
)
2914 struct minimal_symbol
*minsym
;
2915 struct unwind_table_entry
*u
;
2916 static CORE_ADDR dyncall
= 0;
2917 static CORE_ADDR sr4export
= 0;
2919 #ifdef GDB_TARGET_IS_HPPA_20W
2920 /* PA64 has a completely different stub/trampoline scheme. Is it
2921 better? Maybe. It's certainly harder to determine with any
2922 certainty that we are in a stub because we can not refer to the
2925 The heuristic is simple. Try to lookup the current PC value in th
2926 minimal symbol table. If that fails, then assume we are not in a
2929 Then see if the PC value falls within the section bounds for the
2930 section containing the minimal symbol we found in the first
2931 step. If it does, then assume we are not in a stub and return.
2933 Finally peek at the instructions to see if they look like a stub. */
2935 struct minimal_symbol
*minsym
;
2940 minsym
= lookup_minimal_symbol_by_pc (pc
);
2944 sec
= SYMBOL_BFD_SECTION (minsym
);
2947 && sec
->vma
+ sec
->_cooked_size
< pc
)
2950 /* We might be in a stub. Peek at the instructions. Stubs are 3
2951 instructions long. */
2952 insn
= read_memory_integer (pc
, 4);
2954 /* Find out where we think we are within the stub. */
2955 if ((insn
& 0xffffc00e) == 0x53610000)
2957 else if ((insn
& 0xffffffff) == 0xe820d000)
2959 else if ((insn
& 0xffffc00e) == 0x537b0000)
2964 /* Now verify each insn in the range looks like a stub instruction. */
2965 insn
= read_memory_integer (addr
, 4);
2966 if ((insn
& 0xffffc00e) != 0x53610000)
2969 /* Now verify each insn in the range looks like a stub instruction. */
2970 insn
= read_memory_integer (addr
+ 4, 4);
2971 if ((insn
& 0xffffffff) != 0xe820d000)
2974 /* Now verify each insn in the range looks like a stub instruction. */
2975 insn
= read_memory_integer (addr
+ 8, 4);
2976 if ((insn
& 0xffffc00e) != 0x537b0000)
2979 /* Looks like a stub. */
2984 /* FIXME XXX - dyncall and sr4export must be initialized whenever we get a
2987 /* First see if PC is in one of the two C-library trampolines. */
2990 minsym
= lookup_minimal_symbol ("$$dyncall", NULL
, NULL
);
2992 dyncall
= SYMBOL_VALUE_ADDRESS (minsym
);
2999 minsym
= lookup_minimal_symbol ("_sr4export", NULL
, NULL
);
3001 sr4export
= SYMBOL_VALUE_ADDRESS (minsym
);
3006 if (pc
== dyncall
|| pc
== sr4export
)
3009 minsym
= lookup_minimal_symbol_by_pc (pc
);
3010 if (minsym
&& strcmp (DEPRECATED_SYMBOL_NAME (minsym
), ".stub") == 0)
3013 /* Get the unwind descriptor corresponding to PC, return zero
3014 if no unwind was found. */
3015 u
= find_unwind_entry (pc
);
3019 /* If this isn't a linker stub, then return now. */
3020 if (u
->stub_unwind
.stub_type
== 0)
3023 /* By definition a long-branch stub is a call stub. */
3024 if (u
->stub_unwind
.stub_type
== LONG_BRANCH
)
3027 /* The call and return path execute the same instructions within
3028 an IMPORT stub! So an IMPORT stub is both a call and return
3030 if (u
->stub_unwind
.stub_type
== IMPORT
)
3033 /* Parameter relocation stubs always have a call path and may have a
3035 if (u
->stub_unwind
.stub_type
== PARAMETER_RELOCATION
3036 || u
->stub_unwind
.stub_type
== EXPORT
)
3040 /* Search forward from the current PC until we hit a branch
3041 or the end of the stub. */
3042 for (addr
= pc
; addr
<= u
->region_end
; addr
+= 4)
3046 insn
= read_memory_integer (addr
, 4);
3048 /* Does it look like a bl? If so then it's the call path, if
3049 we find a bv or be first, then we're on the return path. */
3050 if ((insn
& 0xfc00e000) == 0xe8000000)
3052 else if ((insn
& 0xfc00e001) == 0xe800c000
3053 || (insn
& 0xfc000000) == 0xe0000000)
3057 /* Should never happen. */
3058 warning ("Unable to find branch in parameter relocation stub.\n");
3062 /* Unknown stub type. For now, just return zero. */
3066 /* Return one if PC is in the return path of a trampoline, else return zero.
3068 Note we return one for *any* call trampoline (long-call, arg-reloc), not
3069 just shared library trampolines (import, export). */
3072 hppa_in_solib_return_trampoline (CORE_ADDR pc
, char *name
)
3074 struct unwind_table_entry
*u
;
3076 /* Get the unwind descriptor corresponding to PC, return zero
3077 if no unwind was found. */
3078 u
= find_unwind_entry (pc
);
3082 /* If this isn't a linker stub or it's just a long branch stub, then
3084 if (u
->stub_unwind
.stub_type
== 0 || u
->stub_unwind
.stub_type
== LONG_BRANCH
)
3087 /* The call and return path execute the same instructions within
3088 an IMPORT stub! So an IMPORT stub is both a call and return
3090 if (u
->stub_unwind
.stub_type
== IMPORT
)
3093 /* Parameter relocation stubs always have a call path and may have a
3095 if (u
->stub_unwind
.stub_type
== PARAMETER_RELOCATION
3096 || u
->stub_unwind
.stub_type
== EXPORT
)
3100 /* Search forward from the current PC until we hit a branch
3101 or the end of the stub. */
3102 for (addr
= pc
; addr
<= u
->region_end
; addr
+= 4)
3106 insn
= read_memory_integer (addr
, 4);
3108 /* Does it look like a bl? If so then it's the call path, if
3109 we find a bv or be first, then we're on the return path. */
3110 if ((insn
& 0xfc00e000) == 0xe8000000)
3112 else if ((insn
& 0xfc00e001) == 0xe800c000
3113 || (insn
& 0xfc000000) == 0xe0000000)
3117 /* Should never happen. */
3118 warning ("Unable to find branch in parameter relocation stub.\n");
3122 /* Unknown stub type. For now, just return zero. */
3127 /* Figure out if PC is in a trampoline, and if so find out where
3128 the trampoline will jump to. If not in a trampoline, return zero.
3130 Simple code examination probably is not a good idea since the code
3131 sequences in trampolines can also appear in user code.
3133 We use unwinds and information from the minimal symbol table to
3134 determine when we're in a trampoline. This won't work for ELF
3135 (yet) since it doesn't create stub unwind entries. Whether or
3136 not ELF will create stub unwinds or normal unwinds for linker
3137 stubs is still being debated.
3139 This should handle simple calls through dyncall or sr4export,
3140 long calls, argument relocation stubs, and dyncall/sr4export
3141 calling an argument relocation stub. It even handles some stubs
3142 used in dynamic executables. */
3145 hppa_skip_trampoline_code (CORE_ADDR pc
)
3148 long prev_inst
, curr_inst
, loc
;
3149 static CORE_ADDR dyncall
= 0;
3150 static CORE_ADDR dyncall_external
= 0;
3151 static CORE_ADDR sr4export
= 0;
3152 struct minimal_symbol
*msym
;
3153 struct unwind_table_entry
*u
;
3155 /* FIXME XXX - dyncall and sr4export must be initialized whenever we get a
3160 msym
= lookup_minimal_symbol ("$$dyncall", NULL
, NULL
);
3162 dyncall
= SYMBOL_VALUE_ADDRESS (msym
);
3167 if (!dyncall_external
)
3169 msym
= lookup_minimal_symbol ("$$dyncall_external", NULL
, NULL
);
3171 dyncall_external
= SYMBOL_VALUE_ADDRESS (msym
);
3173 dyncall_external
= -1;
3178 msym
= lookup_minimal_symbol ("_sr4export", NULL
, NULL
);
3180 sr4export
= SYMBOL_VALUE_ADDRESS (msym
);
3185 /* Addresses passed to dyncall may *NOT* be the actual address
3186 of the function. So we may have to do something special. */
3189 pc
= (CORE_ADDR
) read_register (22);
3191 /* If bit 30 (counting from the left) is on, then pc is the address of
3192 the PLT entry for this function, not the address of the function
3193 itself. Bit 31 has meaning too, but only for MPE. */
3195 pc
= (CORE_ADDR
) read_memory_integer (pc
& ~0x3, TARGET_PTR_BIT
/ 8);
3197 if (pc
== dyncall_external
)
3199 pc
= (CORE_ADDR
) read_register (22);
3200 pc
= (CORE_ADDR
) read_memory_integer (pc
& ~0x3, TARGET_PTR_BIT
/ 8);
3202 else if (pc
== sr4export
)
3203 pc
= (CORE_ADDR
) (read_register (22));
3205 /* Get the unwind descriptor corresponding to PC, return zero
3206 if no unwind was found. */
3207 u
= find_unwind_entry (pc
);
3211 /* If this isn't a linker stub, then return now. */
3212 /* elz: attention here! (FIXME) because of a compiler/linker
3213 error, some stubs which should have a non zero stub_unwind.stub_type
3214 have unfortunately a value of zero. So this function would return here
3215 as if we were not in a trampoline. To fix this, we go look at the partial
3216 symbol information, which reports this guy as a stub.
3217 (FIXME): Unfortunately, we are not that lucky: it turns out that the
3218 partial symbol information is also wrong sometimes. This is because
3219 when it is entered (somread.c::som_symtab_read()) it can happen that
3220 if the type of the symbol (from the som) is Entry, and the symbol is
3221 in a shared library, then it can also be a trampoline. This would
3222 be OK, except that I believe the way they decide if we are ina shared library
3223 does not work. SOOOO..., even if we have a regular function w/o trampolines
3224 its minimal symbol can be assigned type mst_solib_trampoline.
3225 Also, if we find that the symbol is a real stub, then we fix the unwind
3226 descriptor, and define the stub type to be EXPORT.
3227 Hopefully this is correct most of the times. */
3228 if (u
->stub_unwind
.stub_type
== 0)
3231 /* elz: NOTE (FIXME!) once the problem with the unwind information is fixed
3232 we can delete all the code which appears between the lines */
3233 /*--------------------------------------------------------------------------*/
3234 msym
= lookup_minimal_symbol_by_pc (pc
);
3236 if (msym
== NULL
|| MSYMBOL_TYPE (msym
) != mst_solib_trampoline
)
3237 return orig_pc
== pc
? 0 : pc
& ~0x3;
3239 else if (msym
!= NULL
&& MSYMBOL_TYPE (msym
) == mst_solib_trampoline
)
3241 struct objfile
*objfile
;
3242 struct minimal_symbol
*msymbol
;
3243 int function_found
= 0;
3245 /* go look if there is another minimal symbol with the same name as
3246 this one, but with type mst_text. This would happen if the msym
3247 is an actual trampoline, in which case there would be another
3248 symbol with the same name corresponding to the real function */
3250 ALL_MSYMBOLS (objfile
, msymbol
)
3252 if (MSYMBOL_TYPE (msymbol
) == mst_text
3253 && STREQ (DEPRECATED_SYMBOL_NAME (msymbol
), DEPRECATED_SYMBOL_NAME (msym
)))
3261 /* the type of msym is correct (mst_solib_trampoline), but
3262 the unwind info is wrong, so set it to the correct value */
3263 u
->stub_unwind
.stub_type
= EXPORT
;
3265 /* the stub type info in the unwind is correct (this is not a
3266 trampoline), but the msym type information is wrong, it
3267 should be mst_text. So we need to fix the msym, and also
3268 get out of this function */
3270 MSYMBOL_TYPE (msym
) = mst_text
;
3271 return orig_pc
== pc
? 0 : pc
& ~0x3;
3275 /*--------------------------------------------------------------------------*/
3278 /* It's a stub. Search for a branch and figure out where it goes.
3279 Note we have to handle multi insn branch sequences like ldil;ble.
3280 Most (all?) other branches can be determined by examining the contents
3281 of certain registers and the stack. */
3288 /* Make sure we haven't walked outside the range of this stub. */
3289 if (u
!= find_unwind_entry (loc
))
3291 warning ("Unable to find branch in linker stub");
3292 return orig_pc
== pc
? 0 : pc
& ~0x3;
3295 prev_inst
= curr_inst
;
3296 curr_inst
= read_memory_integer (loc
, 4);
3298 /* Does it look like a branch external using %r1? Then it's the
3299 branch from the stub to the actual function. */
3300 if ((curr_inst
& 0xffe0e000) == 0xe0202000)
3302 /* Yup. See if the previous instruction loaded
3303 a value into %r1. If so compute and return the jump address. */
3304 if ((prev_inst
& 0xffe00000) == 0x20200000)
3305 return (extract_21 (prev_inst
) + extract_17 (curr_inst
)) & ~0x3;
3308 warning ("Unable to find ldil X,%%r1 before ble Y(%%sr4,%%r1).");
3309 return orig_pc
== pc
? 0 : pc
& ~0x3;
3313 /* Does it look like a be 0(sr0,%r21)? OR
3314 Does it look like a be, n 0(sr0,%r21)? OR
3315 Does it look like a bve (r21)? (this is on PA2.0)
3316 Does it look like a bve, n(r21)? (this is also on PA2.0)
3317 That's the branch from an
3318 import stub to an export stub.
3320 It is impossible to determine the target of the branch via
3321 simple examination of instructions and/or data (consider
3322 that the address in the plabel may be the address of the
3323 bind-on-reference routine in the dynamic loader).
3325 So we have try an alternative approach.
3327 Get the name of the symbol at our current location; it should
3328 be a stub symbol with the same name as the symbol in the
3331 Then lookup a minimal symbol with the same name; we should
3332 get the minimal symbol for the target routine in the shared
3333 library as those take precedence of import/export stubs. */
3334 if ((curr_inst
== 0xe2a00000) ||
3335 (curr_inst
== 0xe2a00002) ||
3336 (curr_inst
== 0xeaa0d000) ||
3337 (curr_inst
== 0xeaa0d002))
3339 struct minimal_symbol
*stubsym
, *libsym
;
3341 stubsym
= lookup_minimal_symbol_by_pc (loc
);
3342 if (stubsym
== NULL
)
3344 warning ("Unable to find symbol for 0x%lx", loc
);
3345 return orig_pc
== pc
? 0 : pc
& ~0x3;
3348 libsym
= lookup_minimal_symbol (DEPRECATED_SYMBOL_NAME (stubsym
), NULL
, NULL
);
3351 warning ("Unable to find library symbol for %s\n",
3352 DEPRECATED_SYMBOL_NAME (stubsym
));
3353 return orig_pc
== pc
? 0 : pc
& ~0x3;
3356 return SYMBOL_VALUE (libsym
);
3359 /* Does it look like bl X,%rp or bl X,%r0? Another way to do a
3360 branch from the stub to the actual function. */
3362 else if ((curr_inst
& 0xffe0e000) == 0xe8400000
3363 || (curr_inst
& 0xffe0e000) == 0xe8000000
3364 || (curr_inst
& 0xffe0e000) == 0xe800A000)
3365 return (loc
+ extract_17 (curr_inst
) + 8) & ~0x3;
3367 /* Does it look like bv (rp)? Note this depends on the
3368 current stack pointer being the same as the stack
3369 pointer in the stub itself! This is a branch on from the
3370 stub back to the original caller. */
3371 /*else if ((curr_inst & 0xffe0e000) == 0xe840c000) */
3372 else if ((curr_inst
& 0xffe0f000) == 0xe840c000)
3374 /* Yup. See if the previous instruction loaded
3376 if (prev_inst
== 0x4bc23ff1)
3377 return (read_memory_integer
3378 (read_register (SP_REGNUM
) - 8, 4)) & ~0x3;
3381 warning ("Unable to find restore of %%rp before bv (%%rp).");
3382 return orig_pc
== pc
? 0 : pc
& ~0x3;
3386 /* elz: added this case to capture the new instruction
3387 at the end of the return part of an export stub used by
3388 the PA2.0: BVE, n (rp) */
3389 else if ((curr_inst
& 0xffe0f000) == 0xe840d000)
3391 return (read_memory_integer
3392 (read_register (SP_REGNUM
) - 24, TARGET_PTR_BIT
/ 8)) & ~0x3;
3395 /* What about be,n 0(sr0,%rp)? It's just another way we return to
3396 the original caller from the stub. Used in dynamic executables. */
3397 else if (curr_inst
== 0xe0400002)
3399 /* The value we jump to is sitting in sp - 24. But that's
3400 loaded several instructions before the be instruction.
3401 I guess we could check for the previous instruction being
3402 mtsp %r1,%sr0 if we want to do sanity checking. */
3403 return (read_memory_integer
3404 (read_register (SP_REGNUM
) - 24, TARGET_PTR_BIT
/ 8)) & ~0x3;
3407 /* Haven't found the branch yet, but we're still in the stub.
3414 /* For the given instruction (INST), return any adjustment it makes
3415 to the stack pointer or zero for no adjustment.
3417 This only handles instructions commonly found in prologues. */
3420 prologue_inst_adjust_sp (unsigned long inst
)
3422 /* This must persist across calls. */
3423 static int save_high21
;
3425 /* The most common way to perform a stack adjustment ldo X(sp),sp */
3426 if ((inst
& 0xffffc000) == 0x37de0000)
3427 return extract_14 (inst
);
3430 if ((inst
& 0xffe00000) == 0x6fc00000)
3431 return extract_14 (inst
);
3433 /* std,ma X,D(sp) */
3434 if ((inst
& 0xffe00008) == 0x73c00008)
3435 return (inst
& 0x1 ? -1 << 13 : 0) | (((inst
>> 4) & 0x3ff) << 3);
3437 /* addil high21,%r1; ldo low11,(%r1),%r30)
3438 save high bits in save_high21 for later use. */
3439 if ((inst
& 0xffe00000) == 0x28200000)
3441 save_high21
= extract_21 (inst
);
3445 if ((inst
& 0xffff0000) == 0x343e0000)
3446 return save_high21
+ extract_14 (inst
);
3448 /* fstws as used by the HP compilers. */
3449 if ((inst
& 0xffffffe0) == 0x2fd01220)
3450 return extract_5_load (inst
);
3452 /* No adjustment. */
3456 /* Return nonzero if INST is a branch of some kind, else return zero. */
3459 is_branch (unsigned long inst
)
3488 /* Return the register number for a GR which is saved by INST or
3489 zero it INST does not save a GR. */
3492 inst_saves_gr (unsigned long inst
)
3494 /* Does it look like a stw? */
3495 if ((inst
>> 26) == 0x1a || (inst
>> 26) == 0x1b
3496 || (inst
>> 26) == 0x1f
3497 || ((inst
>> 26) == 0x1f
3498 && ((inst
>> 6) == 0xa)))
3499 return extract_5R_store (inst
);
3501 /* Does it look like a std? */
3502 if ((inst
>> 26) == 0x1c
3503 || ((inst
>> 26) == 0x03
3504 && ((inst
>> 6) & 0xf) == 0xb))
3505 return extract_5R_store (inst
);
3507 /* Does it look like a stwm? GCC & HPC may use this in prologues. */
3508 if ((inst
>> 26) == 0x1b)
3509 return extract_5R_store (inst
);
3511 /* Does it look like sth or stb? HPC versions 9.0 and later use these
3513 if ((inst
>> 26) == 0x19 || (inst
>> 26) == 0x18
3514 || ((inst
>> 26) == 0x3
3515 && (((inst
>> 6) & 0xf) == 0x8
3516 || (inst
>> 6) & 0xf) == 0x9))
3517 return extract_5R_store (inst
);
3522 /* Return the register number for a FR which is saved by INST or
3523 zero it INST does not save a FR.
3525 Note we only care about full 64bit register stores (that's the only
3526 kind of stores the prologue will use).
3528 FIXME: What about argument stores with the HP compiler in ANSI mode? */
3531 inst_saves_fr (unsigned long inst
)
3533 /* is this an FSTD ? */
3534 if ((inst
& 0xfc00dfc0) == 0x2c001200)
3535 return extract_5r_store (inst
);
3536 if ((inst
& 0xfc000002) == 0x70000002)
3537 return extract_5R_store (inst
);
3538 /* is this an FSTW ? */
3539 if ((inst
& 0xfc00df80) == 0x24001200)
3540 return extract_5r_store (inst
);
3541 if ((inst
& 0xfc000002) == 0x7c000000)
3542 return extract_5R_store (inst
);
3546 /* Advance PC across any function entry prologue instructions
3547 to reach some "real" code.
3549 Use information in the unwind table to determine what exactly should
3550 be in the prologue. */
3554 skip_prologue_hard_way (CORE_ADDR pc
)
3557 CORE_ADDR orig_pc
= pc
;
3558 unsigned long inst
, stack_remaining
, save_gr
, save_fr
, save_rp
, save_sp
;
3559 unsigned long args_stored
, status
, i
, restart_gr
, restart_fr
;
3560 struct unwind_table_entry
*u
;
3566 u
= find_unwind_entry (pc
);
3570 /* If we are not at the beginning of a function, then return now. */
3571 if ((pc
& ~0x3) != u
->region_start
)
3574 /* This is how much of a frame adjustment we need to account for. */
3575 stack_remaining
= u
->Total_frame_size
<< 3;
3577 /* Magic register saves we want to know about. */
3578 save_rp
= u
->Save_RP
;
3579 save_sp
= u
->Save_SP
;
3581 /* An indication that args may be stored into the stack. Unfortunately
3582 the HPUX compilers tend to set this in cases where no args were
3586 /* Turn the Entry_GR field into a bitmask. */
3588 for (i
= 3; i
< u
->Entry_GR
+ 3; i
++)
3590 /* Frame pointer gets saved into a special location. */
3591 if (u
->Save_SP
&& i
== FP_REGNUM
)
3594 save_gr
|= (1 << i
);
3596 save_gr
&= ~restart_gr
;
3598 /* Turn the Entry_FR field into a bitmask too. */
3600 for (i
= 12; i
< u
->Entry_FR
+ 12; i
++)
3601 save_fr
|= (1 << i
);
3602 save_fr
&= ~restart_fr
;
3604 /* Loop until we find everything of interest or hit a branch.
3606 For unoptimized GCC code and for any HP CC code this will never ever
3607 examine any user instructions.
3609 For optimzied GCC code we're faced with problems. GCC will schedule
3610 its prologue and make prologue instructions available for delay slot
3611 filling. The end result is user code gets mixed in with the prologue
3612 and a prologue instruction may be in the delay slot of the first branch
3615 Some unexpected things are expected with debugging optimized code, so
3616 we allow this routine to walk past user instructions in optimized
3618 while (save_gr
|| save_fr
|| save_rp
|| save_sp
|| stack_remaining
> 0
3621 unsigned int reg_num
;
3622 unsigned long old_stack_remaining
, old_save_gr
, old_save_fr
;
3623 unsigned long old_save_rp
, old_save_sp
, next_inst
;
3625 /* Save copies of all the triggers so we can compare them later
3627 old_save_gr
= save_gr
;
3628 old_save_fr
= save_fr
;
3629 old_save_rp
= save_rp
;
3630 old_save_sp
= save_sp
;
3631 old_stack_remaining
= stack_remaining
;
3633 status
= target_read_memory (pc
, buf
, 4);
3634 inst
= extract_unsigned_integer (buf
, 4);
3640 /* Note the interesting effects of this instruction. */
3641 stack_remaining
-= prologue_inst_adjust_sp (inst
);
3643 /* There are limited ways to store the return pointer into the
3645 if (inst
== 0x6bc23fd9 || inst
== 0x0fc212c1)
3648 /* These are the only ways we save SP into the stack. At this time
3649 the HP compilers never bother to save SP into the stack. */
3650 if ((inst
& 0xffffc000) == 0x6fc10000
3651 || (inst
& 0xffffc00c) == 0x73c10008)
3654 /* Are we loading some register with an offset from the argument
3656 if ((inst
& 0xffe00000) == 0x37a00000
3657 || (inst
& 0xffffffe0) == 0x081d0240)
3663 /* Account for general and floating-point register saves. */
3664 reg_num
= inst_saves_gr (inst
);
3665 save_gr
&= ~(1 << reg_num
);
3667 /* Ugh. Also account for argument stores into the stack.
3668 Unfortunately args_stored only tells us that some arguments
3669 where stored into the stack. Not how many or what kind!
3671 This is a kludge as on the HP compiler sets this bit and it
3672 never does prologue scheduling. So once we see one, skip past
3673 all of them. We have similar code for the fp arg stores below.
3675 FIXME. Can still die if we have a mix of GR and FR argument
3677 if (reg_num
>= (TARGET_PTR_BIT
== 64 ? 19 : 23) && reg_num
<= 26)
3679 while (reg_num
>= (TARGET_PTR_BIT
== 64 ? 19 : 23) && reg_num
<= 26)
3682 status
= target_read_memory (pc
, buf
, 4);
3683 inst
= extract_unsigned_integer (buf
, 4);
3686 reg_num
= inst_saves_gr (inst
);
3692 reg_num
= inst_saves_fr (inst
);
3693 save_fr
&= ~(1 << reg_num
);
3695 status
= target_read_memory (pc
+ 4, buf
, 4);
3696 next_inst
= extract_unsigned_integer (buf
, 4);
3702 /* We've got to be read to handle the ldo before the fp register
3704 if ((inst
& 0xfc000000) == 0x34000000
3705 && inst_saves_fr (next_inst
) >= 4
3706 && inst_saves_fr (next_inst
) <= (TARGET_PTR_BIT
== 64 ? 11 : 7))
3708 /* So we drop into the code below in a reasonable state. */
3709 reg_num
= inst_saves_fr (next_inst
);
3713 /* Ugh. Also account for argument stores into the stack.
3714 This is a kludge as on the HP compiler sets this bit and it
3715 never does prologue scheduling. So once we see one, skip past
3717 if (reg_num
>= 4 && reg_num
<= (TARGET_PTR_BIT
== 64 ? 11 : 7))
3719 while (reg_num
>= 4 && reg_num
<= (TARGET_PTR_BIT
== 64 ? 11 : 7))
3722 status
= target_read_memory (pc
, buf
, 4);
3723 inst
= extract_unsigned_integer (buf
, 4);
3726 if ((inst
& 0xfc000000) != 0x34000000)
3728 status
= target_read_memory (pc
+ 4, buf
, 4);
3729 next_inst
= extract_unsigned_integer (buf
, 4);
3732 reg_num
= inst_saves_fr (next_inst
);
3738 /* Quit if we hit any kind of branch. This can happen if a prologue
3739 instruction is in the delay slot of the first call/branch. */
3740 if (is_branch (inst
))
3743 /* What a crock. The HP compilers set args_stored even if no
3744 arguments were stored into the stack (boo hiss). This could
3745 cause this code to then skip a bunch of user insns (up to the
3748 To combat this we try to identify when args_stored was bogusly
3749 set and clear it. We only do this when args_stored is nonzero,
3750 all other resources are accounted for, and nothing changed on
3753 && !(save_gr
|| save_fr
|| save_rp
|| save_sp
|| stack_remaining
> 0)
3754 && old_save_gr
== save_gr
&& old_save_fr
== save_fr
3755 && old_save_rp
== save_rp
&& old_save_sp
== save_sp
3756 && old_stack_remaining
== stack_remaining
)
3763 /* We've got a tenative location for the end of the prologue. However
3764 because of limitations in the unwind descriptor mechanism we may
3765 have went too far into user code looking for the save of a register
3766 that does not exist. So, if there registers we expected to be saved
3767 but never were, mask them out and restart.
3769 This should only happen in optimized code, and should be very rare. */
3770 if (save_gr
|| (save_fr
&& !(restart_fr
|| restart_gr
)))
3773 restart_gr
= save_gr
;
3774 restart_fr
= save_fr
;
3782 /* Return the address of the PC after the last prologue instruction if
3783 we can determine it from the debug symbols. Else return zero. */
3786 after_prologue (CORE_ADDR pc
)
3788 struct symtab_and_line sal
;
3789 CORE_ADDR func_addr
, func_end
;
3792 /* If we can not find the symbol in the partial symbol table, then
3793 there is no hope we can determine the function's start address
3795 if (!find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
3798 /* Get the line associated with FUNC_ADDR. */
3799 sal
= find_pc_line (func_addr
, 0);
3801 /* There are only two cases to consider. First, the end of the source line
3802 is within the function bounds. In that case we return the end of the
3803 source line. Second is the end of the source line extends beyond the
3804 bounds of the current function. We need to use the slow code to
3805 examine instructions in that case.
3807 Anything else is simply a bug elsewhere. Fixing it here is absolutely
3808 the wrong thing to do. In fact, it should be entirely possible for this
3809 function to always return zero since the slow instruction scanning code
3810 is supposed to *always* work. If it does not, then it is a bug. */
3811 if (sal
.end
< func_end
)
3817 /* To skip prologues, I use this predicate. Returns either PC itself
3818 if the code at PC does not look like a function prologue; otherwise
3819 returns an address that (if we're lucky) follows the prologue. If
3820 LENIENT, then we must skip everything which is involved in setting
3821 up the frame (it's OK to skip more, just so long as we don't skip
3822 anything which might clobber the registers which are being saved.
3823 Currently we must not skip more on the alpha, but we might the lenient
3827 hppa_skip_prologue (CORE_ADDR pc
)
3831 CORE_ADDR post_prologue_pc
;
3834 /* See if we can determine the end of the prologue via the symbol table.
3835 If so, then return either PC, or the PC after the prologue, whichever
3838 post_prologue_pc
= after_prologue (pc
);
3840 /* If after_prologue returned a useful address, then use it. Else
3841 fall back on the instruction skipping code.
3843 Some folks have claimed this causes problems because the breakpoint
3844 may be the first instruction of the prologue. If that happens, then
3845 the instruction skipping code has a bug that needs to be fixed. */
3846 if (post_prologue_pc
!= 0)
3847 return max (pc
, post_prologue_pc
);
3849 return (skip_prologue_hard_way (pc
));
3852 /* Put here the code to store, into the SAVED_REGS, the addresses of
3853 the saved registers of frame described by FRAME_INFO. This
3854 includes special registers such as pc and fp saved in special ways
3855 in the stack frame. sp is even more special: the address we return
3856 for it IS the sp for the next frame. */
3859 hppa_frame_find_saved_regs (struct frame_info
*frame_info
,
3860 CORE_ADDR frame_saved_regs
[])
3863 struct unwind_table_entry
*u
;
3864 unsigned long inst
, stack_remaining
, save_gr
, save_fr
, save_rp
, save_sp
;
3868 int final_iteration
;
3870 /* Zero out everything. */
3871 memset (frame_saved_regs
, '\0', SIZEOF_FRAME_SAVED_REGS
);
3873 /* Call dummy frames always look the same, so there's no need to
3874 examine the dummy code to determine locations of saved registers;
3875 instead, let find_dummy_frame_regs fill in the correct offsets
3876 for the saved registers. */
3877 if ((frame_info
->pc
>= frame_info
->frame
3878 && frame_info
->pc
<= (frame_info
->frame
3879 /* A call dummy is sized in words, but it is
3880 actually a series of instructions. Account
3881 for that scaling factor. */
3882 + ((REGISTER_SIZE
/ INSTRUCTION_SIZE
)
3883 * CALL_DUMMY_LENGTH
)
3884 /* Similarly we have to account for 64bit
3885 wide register saves. */
3886 + (32 * REGISTER_SIZE
)
3887 /* We always consider FP regs 8 bytes long. */
3888 + (NUM_REGS
- FP0_REGNUM
) * 8
3889 /* Similarly we have to account for 64bit
3890 wide register saves. */
3891 + (6 * REGISTER_SIZE
))))
3892 find_dummy_frame_regs (frame_info
, frame_saved_regs
);
3894 /* Interrupt handlers are special too. They lay out the register
3895 state in the exact same order as the register numbers in GDB. */
3896 if (pc_in_interrupt_handler (frame_info
->pc
))
3898 for (i
= 0; i
< NUM_REGS
; i
++)
3900 /* SP is a little special. */
3902 frame_saved_regs
[SP_REGNUM
]
3903 = read_memory_integer (frame_info
->frame
+ SP_REGNUM
* 4,
3904 TARGET_PTR_BIT
/ 8);
3906 frame_saved_regs
[i
] = frame_info
->frame
+ i
* 4;
3911 #ifdef FRAME_FIND_SAVED_REGS_IN_SIGTRAMP
3912 /* Handle signal handler callers. */
3913 if ((get_frame_type (frame_info
) == SIGTRAMP_FRAME
))
3915 FRAME_FIND_SAVED_REGS_IN_SIGTRAMP (frame_info
, frame_saved_regs
);
3920 /* Get the starting address of the function referred to by the PC
3922 pc
= get_frame_func (frame_info
);
3925 u
= find_unwind_entry (pc
);
3929 /* This is how much of a frame adjustment we need to account for. */
3930 stack_remaining
= u
->Total_frame_size
<< 3;
3932 /* Magic register saves we want to know about. */
3933 save_rp
= u
->Save_RP
;
3934 save_sp
= u
->Save_SP
;
3936 /* Turn the Entry_GR field into a bitmask. */
3938 for (i
= 3; i
< u
->Entry_GR
+ 3; i
++)
3940 /* Frame pointer gets saved into a special location. */
3941 if (u
->Save_SP
&& i
== FP_REGNUM
)
3944 save_gr
|= (1 << i
);
3947 /* Turn the Entry_FR field into a bitmask too. */
3949 for (i
= 12; i
< u
->Entry_FR
+ 12; i
++)
3950 save_fr
|= (1 << i
);
3952 /* The frame always represents the value of %sp at entry to the
3953 current function (and is thus equivalent to the "saved" stack
3955 frame_saved_regs
[SP_REGNUM
] = frame_info
->frame
;
3957 /* Loop until we find everything of interest or hit a branch.
3959 For unoptimized GCC code and for any HP CC code this will never ever
3960 examine any user instructions.
3962 For optimized GCC code we're faced with problems. GCC will schedule
3963 its prologue and make prologue instructions available for delay slot
3964 filling. The end result is user code gets mixed in with the prologue
3965 and a prologue instruction may be in the delay slot of the first branch
3968 Some unexpected things are expected with debugging optimized code, so
3969 we allow this routine to walk past user instructions in optimized
3971 final_iteration
= 0;
3972 while ((save_gr
|| save_fr
|| save_rp
|| save_sp
|| stack_remaining
> 0)
3973 && pc
<= frame_info
->pc
)
3975 status
= target_read_memory (pc
, buf
, 4);
3976 inst
= extract_unsigned_integer (buf
, 4);
3982 /* Note the interesting effects of this instruction. */
3983 stack_remaining
-= prologue_inst_adjust_sp (inst
);
3985 /* There are limited ways to store the return pointer into the
3987 if (inst
== 0x6bc23fd9) /* stw rp,-0x14(sr0,sp) */
3990 frame_saved_regs
[RP_REGNUM
] = frame_info
->frame
- 20;
3992 else if (inst
== 0x0fc212c1) /* std rp,-0x10(sr0,sp) */
3995 frame_saved_regs
[RP_REGNUM
] = frame_info
->frame
- 16;
3998 /* Note if we saved SP into the stack. This also happens to indicate
3999 the location of the saved frame pointer. */
4000 if ( (inst
& 0xffffc000) == 0x6fc10000 /* stw,ma r1,N(sr0,sp) */
4001 || (inst
& 0xffffc00c) == 0x73c10008) /* std,ma r1,N(sr0,sp) */
4003 frame_saved_regs
[FP_REGNUM
] = frame_info
->frame
;
4007 /* Account for general and floating-point register saves. */
4008 reg
= inst_saves_gr (inst
);
4009 if (reg
>= 3 && reg
<= 18
4010 && (!u
->Save_SP
|| reg
!= FP_REGNUM
))
4012 save_gr
&= ~(1 << reg
);
4014 /* stwm with a positive displacement is a *post modify*. */
4015 if ((inst
>> 26) == 0x1b
4016 && extract_14 (inst
) >= 0)
4017 frame_saved_regs
[reg
] = frame_info
->frame
;
4018 /* A std has explicit post_modify forms. */
4019 else if ((inst
& 0xfc00000c0) == 0x70000008)
4020 frame_saved_regs
[reg
] = frame_info
->frame
;
4025 if ((inst
>> 26) == 0x1c)
4026 offset
= (inst
& 0x1 ? -1 << 13 : 0) | (((inst
>> 4) & 0x3ff) << 3);
4027 else if ((inst
>> 26) == 0x03)
4028 offset
= low_sign_extend (inst
& 0x1f, 5);
4030 offset
= extract_14 (inst
);
4032 /* Handle code with and without frame pointers. */
4034 frame_saved_regs
[reg
]
4035 = frame_info
->frame
+ offset
;
4037 frame_saved_regs
[reg
]
4038 = (frame_info
->frame
+ (u
->Total_frame_size
<< 3)
4044 /* GCC handles callee saved FP regs a little differently.
4046 It emits an instruction to put the value of the start of
4047 the FP store area into %r1. It then uses fstds,ma with
4048 a basereg of %r1 for the stores.
4050 HP CC emits them at the current stack pointer modifying
4051 the stack pointer as it stores each register. */
4053 /* ldo X(%r3),%r1 or ldo X(%r30),%r1. */
4054 if ((inst
& 0xffffc000) == 0x34610000
4055 || (inst
& 0xffffc000) == 0x37c10000)
4056 fp_loc
= extract_14 (inst
);
4058 reg
= inst_saves_fr (inst
);
4059 if (reg
>= 12 && reg
<= 21)
4061 /* Note +4 braindamage below is necessary because the FP status
4062 registers are internally 8 registers rather than the expected
4064 save_fr
&= ~(1 << reg
);
4067 /* 1st HP CC FP register store. After this instruction
4068 we've set enough state that the GCC and HPCC code are
4069 both handled in the same manner. */
4070 frame_saved_regs
[reg
+ FP4_REGNUM
+ 4] = frame_info
->frame
;
4075 frame_saved_regs
[reg
+ FP0_REGNUM
+ 4]
4076 = frame_info
->frame
+ fp_loc
;
4081 /* Quit if we hit any kind of branch the previous iteration. */
4082 if (final_iteration
)
4085 /* We want to look precisely one instruction beyond the branch
4086 if we have not found everything yet. */
4087 if (is_branch (inst
))
4088 final_iteration
= 1;
4095 /* XXX - deprecated. This is a compatibility function for targets
4096 that do not yet implement DEPRECATED_FRAME_INIT_SAVED_REGS. */
4097 /* Find the addresses in which registers are saved in FRAME. */
4100 hppa_frame_init_saved_regs (struct frame_info
*frame
)
4102 if (get_frame_saved_regs (frame
) == NULL
)
4103 frame_saved_regs_zalloc (frame
);
4104 hppa_frame_find_saved_regs (frame
, get_frame_saved_regs (frame
));
4107 /* Exception handling support for the HP-UX ANSI C++ compiler.
4108 The compiler (aCC) provides a callback for exception events;
4109 GDB can set a breakpoint on this callback and find out what
4110 exception event has occurred. */
4112 /* The name of the hook to be set to point to the callback function */
4113 static char HP_ACC_EH_notify_hook
[] = "__eh_notify_hook";
4114 /* The name of the function to be used to set the hook value */
4115 static char HP_ACC_EH_set_hook_value
[] = "__eh_set_hook_value";
4116 /* The name of the callback function in end.o */
4117 static char HP_ACC_EH_notify_callback
[] = "__d_eh_notify_callback";
4118 /* Name of function in end.o on which a break is set (called by above) */
4119 static char HP_ACC_EH_break
[] = "__d_eh_break";
4120 /* Name of flag (in end.o) that enables catching throws */
4121 static char HP_ACC_EH_catch_throw
[] = "__d_eh_catch_throw";
4122 /* Name of flag (in end.o) that enables catching catching */
4123 static char HP_ACC_EH_catch_catch
[] = "__d_eh_catch_catch";
4124 /* The enum used by aCC */
4132 /* Is exception-handling support available with this executable? */
4133 static int hp_cxx_exception_support
= 0;
4134 /* Has the initialize function been run? */
4135 int hp_cxx_exception_support_initialized
= 0;
4136 /* Similar to above, but imported from breakpoint.c -- non-target-specific */
4137 extern int exception_support_initialized
;
4138 /* Address of __eh_notify_hook */
4139 static CORE_ADDR eh_notify_hook_addr
= 0;
4140 /* Address of __d_eh_notify_callback */
4141 static CORE_ADDR eh_notify_callback_addr
= 0;
4142 /* Address of __d_eh_break */
4143 static CORE_ADDR eh_break_addr
= 0;
4144 /* Address of __d_eh_catch_catch */
4145 static CORE_ADDR eh_catch_catch_addr
= 0;
4146 /* Address of __d_eh_catch_throw */
4147 static CORE_ADDR eh_catch_throw_addr
= 0;
4148 /* Sal for __d_eh_break */
4149 static struct symtab_and_line
*break_callback_sal
= 0;
4151 /* Code in end.c expects __d_pid to be set in the inferior,
4152 otherwise __d_eh_notify_callback doesn't bother to call
4153 __d_eh_break! So we poke the pid into this symbol
4158 setup_d_pid_in_inferior (void)
4161 struct minimal_symbol
*msymbol
;
4162 char buf
[4]; /* FIXME 32x64? */
4164 /* Slam the pid of the process into __d_pid; failing is only a warning! */
4165 msymbol
= lookup_minimal_symbol ("__d_pid", NULL
, symfile_objfile
);
4166 if (msymbol
== NULL
)
4168 warning ("Unable to find __d_pid symbol in object file.");
4169 warning ("Suggest linking executable with -g (links in /opt/langtools/lib/end.o).");
4173 anaddr
= SYMBOL_VALUE_ADDRESS (msymbol
);
4174 store_unsigned_integer (buf
, 4, PIDGET (inferior_ptid
)); /* FIXME 32x64? */
4175 if (target_write_memory (anaddr
, buf
, 4)) /* FIXME 32x64? */
4177 warning ("Unable to write __d_pid");
4178 warning ("Suggest linking executable with -g (links in /opt/langtools/lib/end.o).");
4184 /* Initialize exception catchpoint support by looking for the
4185 necessary hooks/callbacks in end.o, etc., and set the hook value to
4186 point to the required debug function
4192 initialize_hp_cxx_exception_support (void)
4194 struct symtabs_and_lines sals
;
4195 struct cleanup
*old_chain
;
4196 struct cleanup
*canonical_strings_chain
= NULL
;
4199 char *addr_end
= NULL
;
4200 char **canonical
= (char **) NULL
;
4202 struct symbol
*sym
= NULL
;
4203 struct minimal_symbol
*msym
= NULL
;
4204 struct objfile
*objfile
;
4205 asection
*shlib_info
;
4207 /* Detect and disallow recursion. On HP-UX with aCC, infinite
4208 recursion is a possibility because finding the hook for exception
4209 callbacks involves making a call in the inferior, which means
4210 re-inserting breakpoints which can re-invoke this code */
4212 static int recurse
= 0;
4215 hp_cxx_exception_support_initialized
= 0;
4216 exception_support_initialized
= 0;
4220 hp_cxx_exception_support
= 0;
4222 /* First check if we have seen any HP compiled objects; if not,
4223 it is very unlikely that HP's idiosyncratic callback mechanism
4224 for exception handling debug support will be available!
4225 This will percolate back up to breakpoint.c, where our callers
4226 will decide to try the g++ exception-handling support instead. */
4227 if (!hp_som_som_object_present
)
4230 /* We have a SOM executable with SOM debug info; find the hooks */
4232 /* First look for the notify hook provided by aCC runtime libs */
4233 /* If we find this symbol, we conclude that the executable must
4234 have HP aCC exception support built in. If this symbol is not
4235 found, even though we're a HP SOM-SOM file, we may have been
4236 built with some other compiler (not aCC). This results percolates
4237 back up to our callers in breakpoint.c which can decide to
4238 try the g++ style of exception support instead.
4239 If this symbol is found but the other symbols we require are
4240 not found, there is something weird going on, and g++ support
4241 should *not* be tried as an alternative.
4243 ASSUMPTION: Only HP aCC code will have __eh_notify_hook defined.
4244 ASSUMPTION: HP aCC and g++ modules cannot be linked together. */
4246 /* libCsup has this hook; it'll usually be non-debuggable */
4247 msym
= lookup_minimal_symbol (HP_ACC_EH_notify_hook
, NULL
, NULL
);
4250 eh_notify_hook_addr
= SYMBOL_VALUE_ADDRESS (msym
);
4251 hp_cxx_exception_support
= 1;
4255 warning ("Unable to find exception callback hook (%s).", HP_ACC_EH_notify_hook
);
4256 warning ("Executable may not have been compiled debuggable with HP aCC.");
4257 warning ("GDB will be unable to intercept exception events.");
4258 eh_notify_hook_addr
= 0;
4259 hp_cxx_exception_support
= 0;
4263 /* Next look for the notify callback routine in end.o */
4264 /* This is always available in the SOM symbol dictionary if end.o is linked in */
4265 msym
= lookup_minimal_symbol (HP_ACC_EH_notify_callback
, NULL
, NULL
);
4268 eh_notify_callback_addr
= SYMBOL_VALUE_ADDRESS (msym
);
4269 hp_cxx_exception_support
= 1;
4273 warning ("Unable to find exception callback routine (%s).", HP_ACC_EH_notify_callback
);
4274 warning ("Suggest linking executable with -g (links in /opt/langtools/lib/end.o).");
4275 warning ("GDB will be unable to intercept exception events.");
4276 eh_notify_callback_addr
= 0;
4280 #ifndef GDB_TARGET_IS_HPPA_20W
4281 /* Check whether the executable is dynamically linked or archive bound */
4282 /* With an archive-bound executable we can use the raw addresses we find
4283 for the callback function, etc. without modification. For an executable
4284 with shared libraries, we have to do more work to find the plabel, which
4285 can be the target of a call through $$dyncall from the aCC runtime support
4286 library (libCsup) which is linked shared by default by aCC. */
4287 /* This test below was copied from somsolib.c/somread.c. It may not be a very
4288 reliable one to test that an executable is linked shared. pai/1997-07-18 */
4289 shlib_info
= bfd_get_section_by_name (symfile_objfile
->obfd
, "$SHLIB_INFO$");
4290 if (shlib_info
&& (bfd_section_size (symfile_objfile
->obfd
, shlib_info
) != 0))
4292 /* The minsym we have has the local code address, but that's not the
4293 plabel that can be used by an inter-load-module call. */
4294 /* Find solib handle for main image (which has end.o), and use that
4295 and the min sym as arguments to __d_shl_get() (which does the equivalent
4296 of shl_findsym()) to find the plabel. */
4298 args_for_find_stub args
;
4299 static char message
[] = "Error while finding exception callback hook:\n";
4301 args
.solib_handle
= som_solib_get_solib_by_pc (eh_notify_callback_addr
);
4303 args
.return_val
= 0;
4306 catch_errors (cover_find_stub_with_shl_get
, &args
, message
,
4308 eh_notify_callback_addr
= args
.return_val
;
4311 exception_catchpoints_are_fragile
= 1;
4313 if (!eh_notify_callback_addr
)
4315 /* We can get here either if there is no plabel in the export list
4316 for the main image, or if something strange happened (?) */
4317 warning ("Couldn't find a plabel (indirect function label) for the exception callback.");
4318 warning ("GDB will not be able to intercept exception events.");
4323 exception_catchpoints_are_fragile
= 0;
4326 /* Now, look for the breakpointable routine in end.o */
4327 /* This should also be available in the SOM symbol dict. if end.o linked in */
4328 msym
= lookup_minimal_symbol (HP_ACC_EH_break
, NULL
, NULL
);
4331 eh_break_addr
= SYMBOL_VALUE_ADDRESS (msym
);
4332 hp_cxx_exception_support
= 1;
4336 warning ("Unable to find exception callback routine to set breakpoint (%s).", HP_ACC_EH_break
);
4337 warning ("Suggest linking executable with -g (link in /opt/langtools/lib/end.o).");
4338 warning ("GDB will be unable to intercept exception events.");
4343 /* Next look for the catch enable flag provided in end.o */
4344 sym
= lookup_symbol (HP_ACC_EH_catch_catch
, (struct block
*) NULL
,
4345 VAR_NAMESPACE
, 0, (struct symtab
**) NULL
);
4346 if (sym
) /* sometimes present in debug info */
4348 eh_catch_catch_addr
= SYMBOL_VALUE_ADDRESS (sym
);
4349 hp_cxx_exception_support
= 1;
4352 /* otherwise look in SOM symbol dict. */
4354 msym
= lookup_minimal_symbol (HP_ACC_EH_catch_catch
, NULL
, NULL
);
4357 eh_catch_catch_addr
= SYMBOL_VALUE_ADDRESS (msym
);
4358 hp_cxx_exception_support
= 1;
4362 warning ("Unable to enable interception of exception catches.");
4363 warning ("Executable may not have been compiled debuggable with HP aCC.");
4364 warning ("Suggest linking executable with -g (link in /opt/langtools/lib/end.o).");
4369 /* Next look for the catch enable flag provided end.o */
4370 sym
= lookup_symbol (HP_ACC_EH_catch_catch
, (struct block
*) NULL
,
4371 VAR_NAMESPACE
, 0, (struct symtab
**) NULL
);
4372 if (sym
) /* sometimes present in debug info */
4374 eh_catch_throw_addr
= SYMBOL_VALUE_ADDRESS (sym
);
4375 hp_cxx_exception_support
= 1;
4378 /* otherwise look in SOM symbol dict. */
4380 msym
= lookup_minimal_symbol (HP_ACC_EH_catch_throw
, NULL
, NULL
);
4383 eh_catch_throw_addr
= SYMBOL_VALUE_ADDRESS (msym
);
4384 hp_cxx_exception_support
= 1;
4388 warning ("Unable to enable interception of exception throws.");
4389 warning ("Executable may not have been compiled debuggable with HP aCC.");
4390 warning ("Suggest linking executable with -g (link in /opt/langtools/lib/end.o).");
4396 hp_cxx_exception_support
= 2; /* everything worked so far */
4397 hp_cxx_exception_support_initialized
= 1;
4398 exception_support_initialized
= 1;
4403 /* Target operation for enabling or disabling interception of
4405 KIND is either EX_EVENT_THROW or EX_EVENT_CATCH
4406 ENABLE is either 0 (disable) or 1 (enable).
4407 Return value is NULL if no support found;
4408 -1 if something went wrong,
4409 or a pointer to a symtab/line struct if the breakpointable
4410 address was found. */
4412 struct symtab_and_line
*
4413 child_enable_exception_callback (enum exception_event_kind kind
, int enable
)
4417 if (!exception_support_initialized
|| !hp_cxx_exception_support_initialized
)
4418 if (!initialize_hp_cxx_exception_support ())
4421 switch (hp_cxx_exception_support
)
4424 /* Assuming no HP support at all */
4427 /* HP support should be present, but something went wrong */
4428 return (struct symtab_and_line
*) -1; /* yuck! */
4429 /* there may be other cases in the future */
4432 /* Set the EH hook to point to the callback routine */
4433 store_unsigned_integer (buf
, 4, enable
? eh_notify_callback_addr
: 0); /* FIXME 32x64 problem */
4434 /* pai: (temp) FIXME should there be a pack operation first? */
4435 if (target_write_memory (eh_notify_hook_addr
, buf
, 4)) /* FIXME 32x64 problem */
4437 warning ("Could not write to target memory for exception event callback.");
4438 warning ("Interception of exception events may not work.");
4439 return (struct symtab_and_line
*) -1;
4443 /* Ensure that __d_pid is set up correctly -- end.c code checks this. :-( */
4444 if (PIDGET (inferior_ptid
) > 0)
4446 if (setup_d_pid_in_inferior ())
4447 return (struct symtab_and_line
*) -1;
4451 warning ("Internal error: Invalid inferior pid? Cannot intercept exception events.");
4452 return (struct symtab_and_line
*) -1;
4458 case EX_EVENT_THROW
:
4459 store_unsigned_integer (buf
, 4, enable
? 1 : 0);
4460 if (target_write_memory (eh_catch_throw_addr
, buf
, 4)) /* FIXME 32x64? */
4462 warning ("Couldn't enable exception throw interception.");
4463 return (struct symtab_and_line
*) -1;
4466 case EX_EVENT_CATCH
:
4467 store_unsigned_integer (buf
, 4, enable
? 1 : 0);
4468 if (target_write_memory (eh_catch_catch_addr
, buf
, 4)) /* FIXME 32x64? */
4470 warning ("Couldn't enable exception catch interception.");
4471 return (struct symtab_and_line
*) -1;
4475 error ("Request to enable unknown or unsupported exception event.");
4478 /* Copy break address into new sal struct, malloc'ing if needed. */
4479 if (!break_callback_sal
)
4481 break_callback_sal
= (struct symtab_and_line
*) xmalloc (sizeof (struct symtab_and_line
));
4483 init_sal (break_callback_sal
);
4484 break_callback_sal
->symtab
= NULL
;
4485 break_callback_sal
->pc
= eh_break_addr
;
4486 break_callback_sal
->line
= 0;
4487 break_callback_sal
->end
= eh_break_addr
;
4489 return break_callback_sal
;
4492 /* Record some information about the current exception event */
4493 static struct exception_event_record current_ex_event
;
4494 /* Convenience struct */
4495 static struct symtab_and_line null_symtab_and_line
=
4498 /* Report current exception event. Returns a pointer to a record
4499 that describes the kind of the event, where it was thrown from,
4500 and where it will be caught. More information may be reported
4502 struct exception_event_record
*
4503 child_get_current_exception_event (void)
4505 CORE_ADDR event_kind
;
4506 CORE_ADDR throw_addr
;
4507 CORE_ADDR catch_addr
;
4508 struct frame_info
*fi
, *curr_frame
;
4511 curr_frame
= get_current_frame ();
4513 return (struct exception_event_record
*) NULL
;
4515 /* Go up one frame to __d_eh_notify_callback, because at the
4516 point when this code is executed, there's garbage in the
4517 arguments of __d_eh_break. */
4518 fi
= find_relative_frame (curr_frame
, &level
);
4520 return (struct exception_event_record
*) NULL
;
4524 /* Read in the arguments */
4525 /* __d_eh_notify_callback() is called with 3 arguments:
4526 1. event kind catch or throw
4527 2. the target address if known
4528 3. a flag -- not sure what this is. pai/1997-07-17 */
4529 event_kind
= read_register (ARG0_REGNUM
);
4530 catch_addr
= read_register (ARG1_REGNUM
);
4532 /* Now go down to a user frame */
4533 /* For a throw, __d_eh_break is called by
4534 __d_eh_notify_callback which is called by
4535 __notify_throw which is called
4537 For a catch, __d_eh_break is called by
4538 __d_eh_notify_callback which is called by
4539 <stackwalking stuff> which is called by
4540 __throw__<stuff> or __rethrow_<stuff> which is called
4542 /* FIXME: Don't use such magic numbers; search for the frames */
4543 level
= (event_kind
== EX_EVENT_THROW
) ? 3 : 4;
4544 fi
= find_relative_frame (curr_frame
, &level
);
4546 return (struct exception_event_record
*) NULL
;
4549 throw_addr
= fi
->pc
;
4551 /* Go back to original (top) frame */
4552 select_frame (curr_frame
);
4554 current_ex_event
.kind
= (enum exception_event_kind
) event_kind
;
4555 current_ex_event
.throw_sal
= find_pc_line (throw_addr
, 1);
4556 current_ex_event
.catch_sal
= find_pc_line (catch_addr
, 1);
4558 return ¤t_ex_event
;
4561 /* Instead of this nasty cast, add a method pvoid() that prints out a
4562 host VOID data type (remember %p isn't portable). */
4565 hppa_pointer_to_address_hack (void *ptr
)
4567 gdb_assert (sizeof (ptr
) == TYPE_LENGTH (builtin_type_void_data_ptr
));
4568 return POINTER_TO_ADDRESS (builtin_type_void_data_ptr
, &ptr
);
4572 unwind_command (char *exp
, int from_tty
)
4575 struct unwind_table_entry
*u
;
4577 /* If we have an expression, evaluate it and use it as the address. */
4579 if (exp
!= 0 && *exp
!= 0)
4580 address
= parse_and_eval_address (exp
);
4584 u
= find_unwind_entry (address
);
4588 printf_unfiltered ("Can't find unwind table entry for %s\n", exp
);
4592 printf_unfiltered ("unwind_table_entry (0x%s):\n",
4593 paddr_nz (hppa_pointer_to_address_hack (u
)));
4595 printf_unfiltered ("\tregion_start = ");
4596 print_address (u
->region_start
, gdb_stdout
);
4598 printf_unfiltered ("\n\tregion_end = ");
4599 print_address (u
->region_end
, gdb_stdout
);
4601 #define pif(FLD) if (u->FLD) printf_unfiltered (" "#FLD);
4603 printf_unfiltered ("\n\tflags =");
4604 pif (Cannot_unwind
);
4606 pif (Millicode_save_sr0
);
4609 pif (Variable_Frame
);
4610 pif (Separate_Package_Body
);
4611 pif (Frame_Extension_Millicode
);
4612 pif (Stack_Overflow_Check
);
4613 pif (Two_Instruction_SP_Increment
);
4617 pif (Save_MRP_in_frame
);
4618 pif (extn_ptr_defined
);
4619 pif (Cleanup_defined
);
4620 pif (MPE_XL_interrupt_marker
);
4621 pif (HP_UX_interrupt_marker
);
4624 putchar_unfiltered ('\n');
4626 #define pin(FLD) printf_unfiltered ("\t"#FLD" = 0x%x\n", u->FLD);
4628 pin (Region_description
);
4631 pin (Total_frame_size
);
4634 #ifdef PREPARE_TO_PROCEED
4636 /* If the user has switched threads, and there is a breakpoint
4637 at the old thread's pc location, then switch to that thread
4638 and return TRUE, else return FALSE and don't do a thread
4639 switch (or rather, don't seem to have done a thread switch).
4641 Ptrace-based gdb will always return FALSE to the thread-switch
4642 query, and thus also to PREPARE_TO_PROCEED.
4644 The important thing is whether there is a BPT instruction,
4645 not how many user breakpoints there are. So we have to worry
4646 about things like these:
4650 o User hits bp, no switch -- NO
4652 o User hits bp, switches threads -- YES
4654 o User hits bp, deletes bp, switches threads -- NO
4656 o User hits bp, deletes one of two or more bps
4657 at that PC, user switches threads -- YES
4659 o Plus, since we're buffering events, the user may have hit a
4660 breakpoint, deleted the breakpoint and then gotten another
4661 hit on that same breakpoint on another thread which
4662 actually hit before the delete. (FIXME in breakpoint.c
4663 so that "dead" breakpoints are ignored?) -- NO
4665 For these reasons, we have to violate information hiding and
4666 call "breakpoint_here_p". If core gdb thinks there is a bpt
4667 here, that's what counts, as core gdb is the one which is
4668 putting the BPT instruction in and taking it out.
4670 Note that this implementation is potentially redundant now that
4671 default_prepare_to_proceed() has been added.
4673 FIXME This may not support switching threads after Ctrl-C
4674 correctly. The default implementation does support this. */
4676 hppa_prepare_to_proceed (void)
4679 pid_t current_thread
;
4681 old_thread
= hppa_switched_threads (PIDGET (inferior_ptid
));
4682 if (old_thread
!= 0)
4684 /* Switched over from "old_thread". Try to do
4685 as little work as possible, 'cause mostly
4686 we're going to switch back. */
4688 CORE_ADDR old_pc
= read_pc ();
4690 /* Yuk, shouldn't use global to specify current
4691 thread. But that's how gdb does it. */
4692 current_thread
= PIDGET (inferior_ptid
);
4693 inferior_ptid
= pid_to_ptid (old_thread
);
4695 new_pc
= read_pc ();
4696 if (new_pc
!= old_pc
/* If at same pc, no need */
4697 && breakpoint_here_p (new_pc
))
4699 /* User hasn't deleted the BP.
4700 Return TRUE, finishing switch to "old_thread". */
4701 flush_cached_frames ();
4702 registers_changed ();
4704 printf ("---> PREPARE_TO_PROCEED (was %d, now %d)!\n",
4705 current_thread
, PIDGET (inferior_ptid
));
4711 /* Otherwise switch back to the user-chosen thread. */
4712 inferior_ptid
= pid_to_ptid (current_thread
);
4713 new_pc
= read_pc (); /* Re-prime register cache */
4718 #endif /* PREPARE_TO_PROCEED */
4721 hppa_skip_permanent_breakpoint (void)
4723 /* To step over a breakpoint instruction on the PA takes some
4724 fiddling with the instruction address queue.
4726 When we stop at a breakpoint, the IA queue front (the instruction
4727 we're executing now) points at the breakpoint instruction, and
4728 the IA queue back (the next instruction to execute) points to
4729 whatever instruction we would execute after the breakpoint, if it
4730 were an ordinary instruction. This is the case even if the
4731 breakpoint is in the delay slot of a branch instruction.
4733 Clearly, to step past the breakpoint, we need to set the queue
4734 front to the back. But what do we put in the back? What
4735 instruction comes after that one? Because of the branch delay
4736 slot, the next insn is always at the back + 4. */
4737 write_register (PCOQ_HEAD_REGNUM
, read_register (PCOQ_TAIL_REGNUM
));
4738 write_register (PCSQ_HEAD_REGNUM
, read_register (PCSQ_TAIL_REGNUM
));
4740 write_register (PCOQ_TAIL_REGNUM
, read_register (PCOQ_TAIL_REGNUM
) + 4);
4741 /* We can leave the tail's space the same, since there's no jump. */
4744 /* Copy the function value from VALBUF into the proper location
4745 for a function return.
4747 Called only in the context of the "return" command. */
4750 hppa_store_return_value (struct type
*type
, char *valbuf
)
4752 /* For software floating point, the return value goes into the
4753 integer registers. But we do not have any flag to key this on,
4754 so we always store the value into the integer registers.
4756 If its a float value, then we also store it into the floating
4758 deprecated_write_register_bytes (REGISTER_BYTE (28)
4759 + (TYPE_LENGTH (type
) > 4
4760 ? (8 - TYPE_LENGTH (type
))
4761 : (4 - TYPE_LENGTH (type
))),
4762 valbuf
, TYPE_LENGTH (type
));
4763 if (! SOFT_FLOAT
&& TYPE_CODE (type
) == TYPE_CODE_FLT
)
4764 deprecated_write_register_bytes (REGISTER_BYTE (FP4_REGNUM
),
4765 valbuf
, TYPE_LENGTH (type
));
4768 /* Copy the function's return value into VALBUF.
4770 This function is called only in the context of "target function calls",
4771 ie. when the debugger forces a function to be called in the child, and
4772 when the debugger forces a fucntion to return prematurely via the
4773 "return" command. */
4776 hppa_extract_return_value (struct type
*type
, char *regbuf
, char *valbuf
)
4778 if (! SOFT_FLOAT
&& TYPE_CODE (type
) == TYPE_CODE_FLT
)
4780 (char *)regbuf
+ REGISTER_BYTE (FP4_REGNUM
),
4781 TYPE_LENGTH (type
));
4785 + REGISTER_BYTE (28)
4786 + (TYPE_LENGTH (type
) > 4
4787 ? (8 - TYPE_LENGTH (type
))
4788 : (4 - TYPE_LENGTH (type
)))),
4789 TYPE_LENGTH (type
));
4793 hppa_reg_struct_has_addr (int gcc_p
, struct type
*type
)
4795 /* On the PA, any pass-by-value structure > 8 bytes is actually passed
4796 via a pointer regardless of its type or the compiler used. */
4797 return (TYPE_LENGTH (type
) > 8);
4801 hppa_inner_than (CORE_ADDR lhs
, CORE_ADDR rhs
)
4803 /* Stack grows upward */
4808 hppa_stack_align (CORE_ADDR sp
)
4810 /* elz: adjust the quantity to the next highest value which is
4811 64-bit aligned. This is used in valops.c, when the sp is adjusted.
4812 On hppa the sp must always be kept 64-bit aligned */
4813 return ((sp
% 8) ? (sp
+ 7) & -8 : sp
);
4817 hppa_pc_requires_run_before_use (CORE_ADDR pc
)
4819 /* Sometimes we may pluck out a minimal symbol that has a negative address.
4821 An example of this occurs when an a.out is linked against a foo.sl.
4822 The foo.sl defines a global bar(), and the a.out declares a signature
4823 for bar(). However, the a.out doesn't directly call bar(), but passes
4824 its address in another call.
4826 If you have this scenario and attempt to "break bar" before running,
4827 gdb will find a minimal symbol for bar() in the a.out. But that
4828 symbol's address will be negative. What this appears to denote is
4829 an index backwards from the base of the procedure linkage table (PLT)
4830 into the data linkage table (DLT), the end of which is contiguous
4831 with the start of the PLT. This is clearly not a valid address for
4832 us to set a breakpoint on.
4834 Note that one must be careful in how one checks for a negative address.
4835 0xc0000000 is a legitimate address of something in a shared text
4836 segment, for example. Since I don't know what the possible range
4837 is of these "really, truly negative" addresses that come from the
4838 minimal symbols, I'm resorting to the gross hack of checking the
4839 top byte of the address for all 1's. Sigh. */
4841 return (!target_has_stack
&& (pc
& 0xFF000000));
4845 hppa_instruction_nullified (void)
4847 /* brobecker 2002/11/07: Couldn't we use a ULONGEST here? It would
4848 avoid the type cast. I'm leaving it as is for now as I'm doing
4849 semi-mechanical multiarching-related changes. */
4850 const int ipsw
= (int) read_register (IPSW_REGNUM
);
4851 const int flags
= (int) read_register (FLAGS_REGNUM
);
4853 return ((ipsw
& 0x00200000) && !(flags
& 0x2));
4857 hppa_register_raw_size (int reg_nr
)
4859 /* All registers have the same size. */
4860 return REGISTER_SIZE
;
4863 /* Index within the register vector of the first byte of the space i
4864 used for register REG_NR. */
4867 hppa_register_byte (int reg_nr
)
4872 /* Return the GDB type object for the "standard" data type of data
4876 hppa_register_virtual_type (int reg_nr
)
4878 if (reg_nr
< FP4_REGNUM
)
4879 return builtin_type_int
;
4881 return builtin_type_float
;
4884 /* Store the address of the place in which to copy the structure the
4885 subroutine will return. This is called from call_function. */
4888 hppa_store_struct_return (CORE_ADDR addr
, CORE_ADDR sp
)
4890 write_register (28, addr
);
4894 hppa_extract_struct_value_address (char *regbuf
)
4896 /* Extract from an array REGBUF containing the (raw) register state
4897 the address in which a function should return its structure value,
4898 as a CORE_ADDR (or an expression that can be used as one). */
4899 /* FIXME: brobecker 2002-12-26.
4900 The current implementation is historical, but we should eventually
4901 implement it in a more robust manner as it relies on the fact that
4902 the address size is equal to the size of an int* _on the host_...
4903 One possible implementation that crossed my mind is to use
4905 return (*(int *)(regbuf
+ REGISTER_BYTE (28)));
4908 /* Return True if REGNUM is not a register available to the user
4909 through ptrace(). */
4912 hppa_cannot_store_register (int regnum
)
4915 || regnum
== PCSQ_HEAD_REGNUM
4916 || (regnum
>= PCSQ_TAIL_REGNUM
&& regnum
< IPSW_REGNUM
)
4917 || (regnum
> IPSW_REGNUM
&& regnum
< FP4_REGNUM
));
4922 hppa_frame_args_address (struct frame_info
*fi
)
4928 hppa_frame_locals_address (struct frame_info
*fi
)
4934 hppa_frame_num_args (struct frame_info
*frame
)
4936 /* We can't tell how many args there are now that the C compiler delays
4942 hppa_smash_text_address (CORE_ADDR addr
)
4944 /* The low two bits of the PC on the PA contain the privilege level.
4945 Some genius implementing a (non-GCC) compiler apparently decided
4946 this means that "addresses" in a text section therefore include a
4947 privilege level, and thus symbol tables should contain these bits.
4948 This seems like a bonehead thing to do--anyway, it seems to work
4949 for our purposes to just ignore those bits. */
4951 return (addr
&= ~0x3);
4954 static struct gdbarch
*
4955 hppa_gdbarch_init (struct gdbarch_info info
, struct gdbarch_list
*arches
)
4957 struct gdbarch
*gdbarch
;
4959 /* Try to determine the ABI of the object we are loading. */
4960 if (info
.abfd
!= NULL
&& info
.osabi
== GDB_OSABI_UNKNOWN
)
4962 /* If it's a SOM file, assume it's HP/UX SOM. */
4963 if (bfd_get_flavour (info
.abfd
) == bfd_target_som_flavour
)
4964 info
.osabi
= GDB_OSABI_HPUX_SOM
;
4967 /* find a candidate among the list of pre-declared architectures. */
4968 arches
= gdbarch_list_lookup_by_info (arches
, &info
);
4970 return (arches
->gdbarch
);
4972 /* If none found, then allocate and initialize one. */
4973 gdbarch
= gdbarch_alloc (&info
, NULL
);
4975 /* Hook in ABI-specific overrides, if they have been registered. */
4976 gdbarch_init_osabi (info
, gdbarch
);
4978 set_gdbarch_reg_struct_has_addr (gdbarch
, hppa_reg_struct_has_addr
);
4979 set_gdbarch_function_start_offset (gdbarch
, 0);
4980 set_gdbarch_skip_prologue (gdbarch
, hppa_skip_prologue
);
4981 set_gdbarch_skip_trampoline_code (gdbarch
, hppa_skip_trampoline_code
);
4982 set_gdbarch_in_solib_call_trampoline (gdbarch
, hppa_in_solib_call_trampoline
);
4983 set_gdbarch_in_solib_return_trampoline (gdbarch
,
4984 hppa_in_solib_return_trampoline
);
4985 set_gdbarch_saved_pc_after_call (gdbarch
, hppa_saved_pc_after_call
);
4986 set_gdbarch_inner_than (gdbarch
, hppa_inner_than
);
4987 set_gdbarch_stack_align (gdbarch
, hppa_stack_align
);
4988 set_gdbarch_decr_pc_after_break (gdbarch
, 0);
4989 set_gdbarch_register_size (gdbarch
, 4);
4990 set_gdbarch_num_regs (gdbarch
, hppa_num_regs
);
4991 set_gdbarch_fp_regnum (gdbarch
, 3);
4992 set_gdbarch_sp_regnum (gdbarch
, 30);
4993 set_gdbarch_fp0_regnum (gdbarch
, 64);
4994 set_gdbarch_pc_regnum (gdbarch
, PCOQ_HEAD_REGNUM
);
4995 set_gdbarch_npc_regnum (gdbarch
, PCOQ_TAIL_REGNUM
);
4996 set_gdbarch_register_raw_size (gdbarch
, hppa_register_raw_size
);
4997 set_gdbarch_register_bytes (gdbarch
, hppa_num_regs
* 4);
4998 set_gdbarch_register_byte (gdbarch
, hppa_register_byte
);
4999 set_gdbarch_register_virtual_size (gdbarch
, hppa_register_raw_size
);
5000 set_gdbarch_deprecated_max_register_raw_size (gdbarch
, 4);
5001 set_gdbarch_deprecated_max_register_virtual_size (gdbarch
, 8);
5002 set_gdbarch_register_virtual_type (gdbarch
, hppa_register_virtual_type
);
5003 set_gdbarch_deprecated_store_struct_return (gdbarch
, hppa_store_struct_return
);
5004 set_gdbarch_deprecated_extract_return_value (gdbarch
,
5005 hppa_extract_return_value
);
5006 set_gdbarch_use_struct_convention (gdbarch
, hppa_use_struct_convention
);
5007 set_gdbarch_deprecated_store_return_value (gdbarch
, hppa_store_return_value
);
5008 set_gdbarch_deprecated_extract_struct_value_address
5009 (gdbarch
, hppa_extract_struct_value_address
);
5010 set_gdbarch_cannot_store_register (gdbarch
, hppa_cannot_store_register
);
5011 set_gdbarch_deprecated_init_extra_frame_info (gdbarch
, hppa_init_extra_frame_info
);
5012 set_gdbarch_deprecated_frame_chain (gdbarch
, hppa_frame_chain
);
5013 set_gdbarch_deprecated_frame_chain_valid (gdbarch
, hppa_frame_chain_valid
);
5014 set_gdbarch_frameless_function_invocation
5015 (gdbarch
, hppa_frameless_function_invocation
);
5016 set_gdbarch_deprecated_frame_saved_pc (gdbarch
, hppa_frame_saved_pc
);
5017 set_gdbarch_frame_args_address (gdbarch
, hppa_frame_args_address
);
5018 set_gdbarch_frame_locals_address (gdbarch
, hppa_frame_locals_address
);
5019 set_gdbarch_frame_num_args (gdbarch
, hppa_frame_num_args
);
5020 set_gdbarch_frame_args_skip (gdbarch
, 0);
5021 set_gdbarch_deprecated_push_dummy_frame (gdbarch
, hppa_push_dummy_frame
);
5022 set_gdbarch_deprecated_pop_frame (gdbarch
, hppa_pop_frame
);
5023 set_gdbarch_call_dummy_length (gdbarch
, INSTRUCTION_SIZE
* 28);
5024 /* set_gdbarch_fix_call_dummy (gdbarch, hppa_fix_call_dummy); */
5025 set_gdbarch_deprecated_push_arguments (gdbarch
, hppa_push_arguments
);
5026 set_gdbarch_smash_text_address (gdbarch
, hppa_smash_text_address
);
5027 set_gdbarch_believe_pcc_promotion (gdbarch
, 1);
5028 set_gdbarch_read_pc (gdbarch
, hppa_target_read_pc
);
5029 set_gdbarch_write_pc (gdbarch
, hppa_target_write_pc
);
5030 set_gdbarch_read_fp (gdbarch
, hppa_target_read_fp
);
5036 hppa_dump_tdep (struct gdbarch
*current_gdbarch
, struct ui_file
*file
)
5038 /* Nothing to print for the moment. */
5042 _initialize_hppa_tdep (void)
5044 struct cmd_list_element
*c
;
5045 void break_at_finish_command (char *arg
, int from_tty
);
5046 void tbreak_at_finish_command (char *arg
, int from_tty
);
5047 void break_at_finish_at_depth_command (char *arg
, int from_tty
);
5049 gdbarch_register (bfd_arch_hppa
, hppa_gdbarch_init
, hppa_dump_tdep
);
5050 tm_print_insn
= print_insn_hppa
;
5052 add_cmd ("unwind", class_maintenance
, unwind_command
,
5053 "Print unwind table entry at given address.",
5054 &maintenanceprintlist
);
5056 deprecate_cmd (add_com ("xbreak", class_breakpoint
,
5057 break_at_finish_command
,
5058 concat ("Set breakpoint at procedure exit. \n\
5059 Argument may be function name, or \"*\" and an address.\n\
5060 If function is specified, break at end of code for that function.\n\
5061 If an address is specified, break at the end of the function that contains \n\
5062 that exact address.\n",
5063 "With no arg, uses current execution address of selected stack frame.\n\
5064 This is useful for breaking on return to a stack frame.\n\
5066 Multiple breakpoints at one place are permitted, and useful if conditional.\n\
5068 Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL
)), NULL
);
5069 deprecate_cmd (add_com_alias ("xb", "xbreak", class_breakpoint
, 1), NULL
);
5070 deprecate_cmd (add_com_alias ("xbr", "xbreak", class_breakpoint
, 1), NULL
);
5071 deprecate_cmd (add_com_alias ("xbre", "xbreak", class_breakpoint
, 1), NULL
);
5072 deprecate_cmd (add_com_alias ("xbrea", "xbreak", class_breakpoint
, 1), NULL
);
5074 deprecate_cmd (c
= add_com ("txbreak", class_breakpoint
,
5075 tbreak_at_finish_command
,
5076 "Set temporary breakpoint at procedure exit. Either there should\n\
5077 be no argument or the argument must be a depth.\n"), NULL
);
5078 set_cmd_completer (c
, location_completer
);
5081 deprecate_cmd (add_com ("bx", class_breakpoint
,
5082 break_at_finish_at_depth_command
,
5083 "Set breakpoint at procedure exit. Either there should\n\
5084 be no argument or the argument must be a depth.\n"), NULL
);