1 /* Target-dependent code for the HP PA-RISC architecture.
3 Copyright (C) 1986-2018 Free Software Foundation, Inc.
5 Contributed by the Center for Software Science at the
6 University of Utah (pa-gdb-bugs@cs.utah.edu).
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 #include "completer.h"
29 #include "arch-utils.h"
30 /* For argument passing to the inferior. */
33 #include "trad-frame.h"
34 #include "frame-unwind.h"
35 #include "frame-base.h"
41 #include "hppa-tdep.h"
44 static int hppa_debug
= 0;
46 /* Some local constants. */
47 static const int hppa32_num_regs
= 128;
48 static const int hppa64_num_regs
= 96;
50 /* We use the objfile->obj_private pointer for two things:
53 * 2. A pointer to any associated shared library object.
55 * #defines are used to help refer to these objects.
58 /* Info about the unwind table associated with an object file.
59 * This is hung off of the "objfile->obj_private" pointer, and
60 * is allocated in the objfile's psymbol obstack. This allows
61 * us to have unique unwind info for each executable and shared
62 * library that we are debugging.
64 struct hppa_unwind_info
66 struct unwind_table_entry
*table
; /* Pointer to unwind info */
67 struct unwind_table_entry
*cache
; /* Pointer to last entry we found */
68 int last
; /* Index of last entry */
71 struct hppa_objfile_private
73 struct hppa_unwind_info
*unwind_info
; /* a pointer */
74 struct so_list
*so_info
; /* a pointer */
77 int dummy_call_sequence_reg
;
78 CORE_ADDR dummy_call_sequence_addr
;
81 /* hppa-specific object data -- unwind and solib info.
82 TODO/maybe: think about splitting this into two parts; the unwind data is
83 common to all hppa targets, but is only used in this file; we can register
84 that separately and make this static. The solib data is probably hpux-
85 specific, so we can create a separate extern objfile_data that is registered
86 by hppa-hpux-tdep.c and shared with pa64solib.c and somsolib.c. */
87 static const struct objfile_data
*hppa_objfile_priv_data
= NULL
;
89 /* Get at various relevent fields of an instruction word. */
92 #define MASK_14 0x3fff
93 #define MASK_21 0x1fffff
95 /* Sizes (in bytes) of the native unwind entries. */
96 #define UNWIND_ENTRY_SIZE 16
97 #define STUB_UNWIND_ENTRY_SIZE 8
99 /* Routines to extract various sized constants out of hppa
102 /* This assumes that no garbage lies outside of the lower bits of
106 hppa_sign_extend (unsigned val
, unsigned bits
)
108 return (int) (val
>> (bits
- 1) ? (-(1 << bits
)) | val
: val
);
111 /* For many immediate values the sign bit is the low bit! */
114 hppa_low_hppa_sign_extend (unsigned val
, unsigned bits
)
116 return (int) ((val
& 0x1 ? (-(1 << (bits
- 1))) : 0) | val
>> 1);
119 /* Extract the bits at positions between FROM and TO, using HP's numbering
123 hppa_get_field (unsigned word
, int from
, int to
)
125 return ((word
) >> (31 - (to
)) & ((1 << ((to
) - (from
) + 1)) - 1));
128 /* Extract the immediate field from a ld{bhw}s instruction. */
131 hppa_extract_5_load (unsigned word
)
133 return hppa_low_hppa_sign_extend (word
>> 16 & MASK_5
, 5);
136 /* Extract the immediate field from a break instruction. */
139 hppa_extract_5r_store (unsigned word
)
141 return (word
& MASK_5
);
144 /* Extract the immediate field from a {sr}sm instruction. */
147 hppa_extract_5R_store (unsigned word
)
149 return (word
>> 16 & MASK_5
);
152 /* Extract a 14 bit immediate field. */
155 hppa_extract_14 (unsigned word
)
157 return hppa_low_hppa_sign_extend (word
& MASK_14
, 14);
160 /* Extract a 21 bit constant. */
163 hppa_extract_21 (unsigned word
)
169 val
= hppa_get_field (word
, 20, 20);
171 val
|= hppa_get_field (word
, 9, 19);
173 val
|= hppa_get_field (word
, 5, 6);
175 val
|= hppa_get_field (word
, 0, 4);
177 val
|= hppa_get_field (word
, 7, 8);
178 return hppa_sign_extend (val
, 21) << 11;
181 /* extract a 17 bit constant from branch instructions, returning the
182 19 bit signed value. */
185 hppa_extract_17 (unsigned word
)
187 return hppa_sign_extend (hppa_get_field (word
, 19, 28) |
188 hppa_get_field (word
, 29, 29) << 10 |
189 hppa_get_field (word
, 11, 15) << 11 |
190 (word
& 0x1) << 16, 17) << 2;
194 hppa_symbol_address(const char *sym
)
196 struct bound_minimal_symbol minsym
;
198 minsym
= lookup_minimal_symbol (sym
, NULL
, NULL
);
200 return BMSYMBOL_VALUE_ADDRESS (minsym
);
202 return (CORE_ADDR
)-1;
205 static struct hppa_objfile_private
*
206 hppa_init_objfile_priv_data (struct objfile
*objfile
)
208 hppa_objfile_private
*priv
209 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
, hppa_objfile_private
);
211 set_objfile_data (objfile
, hppa_objfile_priv_data
, priv
);
217 /* Compare the start address for two unwind entries returning 1 if
218 the first address is larger than the second, -1 if the second is
219 larger than the first, and zero if they are equal. */
222 compare_unwind_entries (const void *arg1
, const void *arg2
)
224 const struct unwind_table_entry
*a
= (const struct unwind_table_entry
*) arg1
;
225 const struct unwind_table_entry
*b
= (const struct unwind_table_entry
*) arg2
;
227 if (a
->region_start
> b
->region_start
)
229 else if (a
->region_start
< b
->region_start
)
236 record_text_segment_lowaddr (bfd
*abfd
, asection
*section
, void *data
)
238 if ((section
->flags
& (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
))
239 == (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
))
241 bfd_vma value
= section
->vma
- section
->filepos
;
242 CORE_ADDR
*low_text_segment_address
= (CORE_ADDR
*)data
;
244 if (value
< *low_text_segment_address
)
245 *low_text_segment_address
= value
;
250 internalize_unwinds (struct objfile
*objfile
, struct unwind_table_entry
*table
,
251 asection
*section
, unsigned int entries
,
252 size_t size
, CORE_ADDR text_offset
)
254 /* We will read the unwind entries into temporary memory, then
255 fill in the actual unwind table. */
259 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
262 char *buf
= (char *) alloca (size
);
263 CORE_ADDR low_text_segment_address
;
265 /* For ELF targets, then unwinds are supposed to
266 be segment relative offsets instead of absolute addresses.
268 Note that when loading a shared library (text_offset != 0) the
269 unwinds are already relative to the text_offset that will be
271 if (gdbarch_tdep (gdbarch
)->is_elf
&& text_offset
== 0)
273 low_text_segment_address
= -1;
275 bfd_map_over_sections (objfile
->obfd
,
276 record_text_segment_lowaddr
,
277 &low_text_segment_address
);
279 text_offset
= low_text_segment_address
;
281 else if (gdbarch_tdep (gdbarch
)->solib_get_text_base
)
283 text_offset
= gdbarch_tdep (gdbarch
)->solib_get_text_base (objfile
);
286 bfd_get_section_contents (objfile
->obfd
, section
, buf
, 0, size
);
288 /* Now internalize the information being careful to handle host/target
290 for (i
= 0; i
< entries
; i
++)
292 table
[i
].region_start
= bfd_get_32 (objfile
->obfd
,
294 table
[i
].region_start
+= text_offset
;
296 table
[i
].region_end
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) buf
);
297 table
[i
].region_end
+= text_offset
;
299 tmp
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) buf
);
301 table
[i
].Cannot_unwind
= (tmp
>> 31) & 0x1;
302 table
[i
].Millicode
= (tmp
>> 30) & 0x1;
303 table
[i
].Millicode_save_sr0
= (tmp
>> 29) & 0x1;
304 table
[i
].Region_description
= (tmp
>> 27) & 0x3;
305 table
[i
].reserved
= (tmp
>> 26) & 0x1;
306 table
[i
].Entry_SR
= (tmp
>> 25) & 0x1;
307 table
[i
].Entry_FR
= (tmp
>> 21) & 0xf;
308 table
[i
].Entry_GR
= (tmp
>> 16) & 0x1f;
309 table
[i
].Args_stored
= (tmp
>> 15) & 0x1;
310 table
[i
].Variable_Frame
= (tmp
>> 14) & 0x1;
311 table
[i
].Separate_Package_Body
= (tmp
>> 13) & 0x1;
312 table
[i
].Frame_Extension_Millicode
= (tmp
>> 12) & 0x1;
313 table
[i
].Stack_Overflow_Check
= (tmp
>> 11) & 0x1;
314 table
[i
].Two_Instruction_SP_Increment
= (tmp
>> 10) & 0x1;
315 table
[i
].sr4export
= (tmp
>> 9) & 0x1;
316 table
[i
].cxx_info
= (tmp
>> 8) & 0x1;
317 table
[i
].cxx_try_catch
= (tmp
>> 7) & 0x1;
318 table
[i
].sched_entry_seq
= (tmp
>> 6) & 0x1;
319 table
[i
].reserved1
= (tmp
>> 5) & 0x1;
320 table
[i
].Save_SP
= (tmp
>> 4) & 0x1;
321 table
[i
].Save_RP
= (tmp
>> 3) & 0x1;
322 table
[i
].Save_MRP_in_frame
= (tmp
>> 2) & 0x1;
323 table
[i
].save_r19
= (tmp
>> 1) & 0x1;
324 table
[i
].Cleanup_defined
= tmp
& 0x1;
325 tmp
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) buf
);
327 table
[i
].MPE_XL_interrupt_marker
= (tmp
>> 31) & 0x1;
328 table
[i
].HP_UX_interrupt_marker
= (tmp
>> 30) & 0x1;
329 table
[i
].Large_frame
= (tmp
>> 29) & 0x1;
330 table
[i
].alloca_frame
= (tmp
>> 28) & 0x1;
331 table
[i
].reserved2
= (tmp
>> 27) & 0x1;
332 table
[i
].Total_frame_size
= tmp
& 0x7ffffff;
334 /* Stub unwinds are handled elsewhere. */
335 table
[i
].stub_unwind
.stub_type
= 0;
336 table
[i
].stub_unwind
.padding
= 0;
341 /* Read in the backtrace information stored in the `$UNWIND_START$' section of
342 the object file. This info is used mainly by find_unwind_entry() to find
343 out the stack frame size and frame pointer used by procedures. We put
344 everything on the psymbol obstack in the objfile so that it automatically
345 gets freed when the objfile is destroyed. */
348 read_unwind_info (struct objfile
*objfile
)
350 asection
*unwind_sec
, *stub_unwind_sec
;
351 size_t unwind_size
, stub_unwind_size
, total_size
;
352 unsigned index
, unwind_entries
;
353 unsigned stub_entries
, total_entries
;
354 CORE_ADDR text_offset
;
355 struct hppa_unwind_info
*ui
;
356 struct hppa_objfile_private
*obj_private
;
358 text_offset
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
359 ui
= (struct hppa_unwind_info
*) obstack_alloc (&objfile
->objfile_obstack
,
360 sizeof (struct hppa_unwind_info
));
366 /* For reasons unknown the HP PA64 tools generate multiple unwinder
367 sections in a single executable. So we just iterate over every
368 section in the BFD looking for unwinder sections intead of trying
369 to do a lookup with bfd_get_section_by_name.
371 First determine the total size of the unwind tables so that we
372 can allocate memory in a nice big hunk. */
374 for (unwind_sec
= objfile
->obfd
->sections
;
376 unwind_sec
= unwind_sec
->next
)
378 if (strcmp (unwind_sec
->name
, "$UNWIND_START$") == 0
379 || strcmp (unwind_sec
->name
, ".PARISC.unwind") == 0)
381 unwind_size
= bfd_section_size (objfile
->obfd
, unwind_sec
);
382 unwind_entries
= unwind_size
/ UNWIND_ENTRY_SIZE
;
384 total_entries
+= unwind_entries
;
388 /* Now compute the size of the stub unwinds. Note the ELF tools do not
389 use stub unwinds at the current time. */
390 stub_unwind_sec
= bfd_get_section_by_name (objfile
->obfd
, "$UNWIND_END$");
394 stub_unwind_size
= bfd_section_size (objfile
->obfd
, stub_unwind_sec
);
395 stub_entries
= stub_unwind_size
/ STUB_UNWIND_ENTRY_SIZE
;
399 stub_unwind_size
= 0;
403 /* Compute total number of unwind entries and their total size. */
404 total_entries
+= stub_entries
;
405 total_size
= total_entries
* sizeof (struct unwind_table_entry
);
407 /* Allocate memory for the unwind table. */
408 ui
->table
= (struct unwind_table_entry
*)
409 obstack_alloc (&objfile
->objfile_obstack
, total_size
);
410 ui
->last
= total_entries
- 1;
412 /* Now read in each unwind section and internalize the standard unwind
415 for (unwind_sec
= objfile
->obfd
->sections
;
417 unwind_sec
= unwind_sec
->next
)
419 if (strcmp (unwind_sec
->name
, "$UNWIND_START$") == 0
420 || strcmp (unwind_sec
->name
, ".PARISC.unwind") == 0)
422 unwind_size
= bfd_section_size (objfile
->obfd
, unwind_sec
);
423 unwind_entries
= unwind_size
/ UNWIND_ENTRY_SIZE
;
425 internalize_unwinds (objfile
, &ui
->table
[index
], unwind_sec
,
426 unwind_entries
, unwind_size
, text_offset
);
427 index
+= unwind_entries
;
431 /* Now read in and internalize the stub unwind entries. */
432 if (stub_unwind_size
> 0)
435 char *buf
= (char *) alloca (stub_unwind_size
);
437 /* Read in the stub unwind entries. */
438 bfd_get_section_contents (objfile
->obfd
, stub_unwind_sec
, buf
,
439 0, stub_unwind_size
);
441 /* Now convert them into regular unwind entries. */
442 for (i
= 0; i
< stub_entries
; i
++, index
++)
444 /* Clear out the next unwind entry. */
445 memset (&ui
->table
[index
], 0, sizeof (struct unwind_table_entry
));
447 /* Convert offset & size into region_start and region_end.
448 Stuff away the stub type into "reserved" fields. */
449 ui
->table
[index
].region_start
= bfd_get_32 (objfile
->obfd
,
451 ui
->table
[index
].region_start
+= text_offset
;
453 ui
->table
[index
].stub_unwind
.stub_type
= bfd_get_8 (objfile
->obfd
,
456 ui
->table
[index
].region_end
457 = ui
->table
[index
].region_start
+ 4 *
458 (bfd_get_16 (objfile
->obfd
, (bfd_byte
*) buf
) - 1);
464 /* Unwind table needs to be kept sorted. */
465 qsort (ui
->table
, total_entries
, sizeof (struct unwind_table_entry
),
466 compare_unwind_entries
);
468 /* Keep a pointer to the unwind information. */
469 obj_private
= (struct hppa_objfile_private
*)
470 objfile_data (objfile
, hppa_objfile_priv_data
);
471 if (obj_private
== NULL
)
472 obj_private
= hppa_init_objfile_priv_data (objfile
);
474 obj_private
->unwind_info
= ui
;
477 /* Lookup the unwind (stack backtrace) info for the given PC. We search all
478 of the objfiles seeking the unwind table entry for this PC. Each objfile
479 contains a sorted list of struct unwind_table_entry. Since we do a binary
480 search of the unwind tables, we depend upon them to be sorted. */
482 struct unwind_table_entry
*
483 find_unwind_entry (CORE_ADDR pc
)
485 int first
, middle
, last
;
486 struct objfile
*objfile
;
487 struct hppa_objfile_private
*priv
;
490 fprintf_unfiltered (gdb_stdlog
, "{ find_unwind_entry %s -> ",
493 /* A function at address 0? Not in HP-UX! */
494 if (pc
== (CORE_ADDR
) 0)
497 fprintf_unfiltered (gdb_stdlog
, "NULL }\n");
501 ALL_OBJFILES (objfile
)
503 struct hppa_unwind_info
*ui
;
505 priv
= ((struct hppa_objfile_private
*)
506 objfile_data (objfile
, hppa_objfile_priv_data
));
508 ui
= ((struct hppa_objfile_private
*) priv
)->unwind_info
;
512 read_unwind_info (objfile
);
513 priv
= ((struct hppa_objfile_private
*)
514 objfile_data (objfile
, hppa_objfile_priv_data
));
516 error (_("Internal error reading unwind information."));
517 ui
= ((struct hppa_objfile_private
*) priv
)->unwind_info
;
520 /* First, check the cache. */
523 && pc
>= ui
->cache
->region_start
524 && pc
<= ui
->cache
->region_end
)
527 fprintf_unfiltered (gdb_stdlog
, "%s (cached) }\n",
528 hex_string ((uintptr_t) ui
->cache
));
532 /* Not in the cache, do a binary search. */
537 while (first
<= last
)
539 middle
= (first
+ last
) / 2;
540 if (pc
>= ui
->table
[middle
].region_start
541 && pc
<= ui
->table
[middle
].region_end
)
543 ui
->cache
= &ui
->table
[middle
];
545 fprintf_unfiltered (gdb_stdlog
, "%s }\n",
546 hex_string ((uintptr_t) ui
->cache
));
547 return &ui
->table
[middle
];
550 if (pc
< ui
->table
[middle
].region_start
)
555 } /* ALL_OBJFILES() */
558 fprintf_unfiltered (gdb_stdlog
, "NULL (not found) }\n");
563 /* Implement the stack_frame_destroyed_p gdbarch method.
565 The epilogue is defined here as the area either on the `bv' instruction
566 itself or an instruction which destroys the function's stack frame.
568 We do not assume that the epilogue is at the end of a function as we can
569 also have return sequences in the middle of a function. */
572 hppa_stack_frame_destroyed_p (struct gdbarch
*gdbarch
, CORE_ADDR pc
)
574 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
575 unsigned long status
;
579 status
= target_read_memory (pc
, buf
, 4);
583 inst
= extract_unsigned_integer (buf
, 4, byte_order
);
585 /* The most common way to perform a stack adjustment ldo X(sp),sp
586 We are destroying a stack frame if the offset is negative. */
587 if ((inst
& 0xffffc000) == 0x37de0000
588 && hppa_extract_14 (inst
) < 0)
591 /* ldw,mb D(sp),X or ldd,mb D(sp),X */
592 if (((inst
& 0x0fc010e0) == 0x0fc010e0
593 || (inst
& 0x0fc010e0) == 0x0fc010e0)
594 && hppa_extract_14 (inst
) < 0)
597 /* bv %r0(%rp) or bv,n %r0(%rp) */
598 if (inst
== 0xe840c000 || inst
== 0xe840c002)
604 constexpr gdb_byte hppa_break_insn
[] = {0x00, 0x01, 0x00, 0x04};
606 typedef BP_MANIPULATION (hppa_break_insn
) hppa_breakpoint
;
608 /* Return the name of a register. */
611 hppa32_register_name (struct gdbarch
*gdbarch
, int i
)
613 static const char *names
[] = {
614 "flags", "r1", "rp", "r3",
615 "r4", "r5", "r6", "r7",
616 "r8", "r9", "r10", "r11",
617 "r12", "r13", "r14", "r15",
618 "r16", "r17", "r18", "r19",
619 "r20", "r21", "r22", "r23",
620 "r24", "r25", "r26", "dp",
621 "ret0", "ret1", "sp", "r31",
622 "sar", "pcoqh", "pcsqh", "pcoqt",
623 "pcsqt", "eiem", "iir", "isr",
624 "ior", "ipsw", "goto", "sr4",
625 "sr0", "sr1", "sr2", "sr3",
626 "sr5", "sr6", "sr7", "cr0",
627 "cr8", "cr9", "ccr", "cr12",
628 "cr13", "cr24", "cr25", "cr26",
629 "mpsfu_high","mpsfu_low","mpsfu_ovflo","pad",
630 "fpsr", "fpe1", "fpe2", "fpe3",
631 "fpe4", "fpe5", "fpe6", "fpe7",
632 "fr4", "fr4R", "fr5", "fr5R",
633 "fr6", "fr6R", "fr7", "fr7R",
634 "fr8", "fr8R", "fr9", "fr9R",
635 "fr10", "fr10R", "fr11", "fr11R",
636 "fr12", "fr12R", "fr13", "fr13R",
637 "fr14", "fr14R", "fr15", "fr15R",
638 "fr16", "fr16R", "fr17", "fr17R",
639 "fr18", "fr18R", "fr19", "fr19R",
640 "fr20", "fr20R", "fr21", "fr21R",
641 "fr22", "fr22R", "fr23", "fr23R",
642 "fr24", "fr24R", "fr25", "fr25R",
643 "fr26", "fr26R", "fr27", "fr27R",
644 "fr28", "fr28R", "fr29", "fr29R",
645 "fr30", "fr30R", "fr31", "fr31R"
647 if (i
< 0 || i
>= (sizeof (names
) / sizeof (*names
)))
654 hppa64_register_name (struct gdbarch
*gdbarch
, int i
)
656 static const char *names
[] = {
657 "flags", "r1", "rp", "r3",
658 "r4", "r5", "r6", "r7",
659 "r8", "r9", "r10", "r11",
660 "r12", "r13", "r14", "r15",
661 "r16", "r17", "r18", "r19",
662 "r20", "r21", "r22", "r23",
663 "r24", "r25", "r26", "dp",
664 "ret0", "ret1", "sp", "r31",
665 "sar", "pcoqh", "pcsqh", "pcoqt",
666 "pcsqt", "eiem", "iir", "isr",
667 "ior", "ipsw", "goto", "sr4",
668 "sr0", "sr1", "sr2", "sr3",
669 "sr5", "sr6", "sr7", "cr0",
670 "cr8", "cr9", "ccr", "cr12",
671 "cr13", "cr24", "cr25", "cr26",
672 "mpsfu_high","mpsfu_low","mpsfu_ovflo","pad",
673 "fpsr", "fpe1", "fpe2", "fpe3",
674 "fr4", "fr5", "fr6", "fr7",
675 "fr8", "fr9", "fr10", "fr11",
676 "fr12", "fr13", "fr14", "fr15",
677 "fr16", "fr17", "fr18", "fr19",
678 "fr20", "fr21", "fr22", "fr23",
679 "fr24", "fr25", "fr26", "fr27",
680 "fr28", "fr29", "fr30", "fr31"
682 if (i
< 0 || i
>= (sizeof (names
) / sizeof (*names
)))
688 /* Map dwarf DBX register numbers to GDB register numbers. */
690 hppa64_dwarf_reg_to_regnum (struct gdbarch
*gdbarch
, int reg
)
692 /* The general registers and the sar are the same in both sets. */
693 if (reg
>= 0 && reg
<= 32)
696 /* fr4-fr31 are mapped from 72 in steps of 2. */
697 if (reg
>= 72 && reg
< 72 + 28 * 2 && !(reg
& 1))
698 return HPPA64_FP4_REGNUM
+ (reg
- 72) / 2;
703 /* This function pushes a stack frame with arguments as part of the
704 inferior function calling mechanism.
706 This is the version of the function for the 32-bit PA machines, in
707 which later arguments appear at lower addresses. (The stack always
708 grows towards higher addresses.)
710 We simply allocate the appropriate amount of stack space and put
711 arguments into their proper slots. */
714 hppa32_push_dummy_call (struct gdbarch
*gdbarch
, struct value
*function
,
715 struct regcache
*regcache
, CORE_ADDR bp_addr
,
716 int nargs
, struct value
**args
, CORE_ADDR sp
,
717 int struct_return
, CORE_ADDR struct_addr
)
719 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
721 /* Stack base address at which any pass-by-reference parameters are
723 CORE_ADDR struct_end
= 0;
724 /* Stack base address at which the first parameter is stored. */
725 CORE_ADDR param_end
= 0;
727 /* Two passes. First pass computes the location of everything,
728 second pass writes the bytes out. */
731 /* Global pointer (r19) of the function we are trying to call. */
734 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
736 for (write_pass
= 0; write_pass
< 2; write_pass
++)
738 CORE_ADDR struct_ptr
= 0;
739 /* The first parameter goes into sp-36, each stack slot is 4-bytes.
740 struct_ptr is adjusted for each argument below, so the first
741 argument will end up at sp-36. */
742 CORE_ADDR param_ptr
= 32;
744 int small_struct
= 0;
746 for (i
= 0; i
< nargs
; i
++)
748 struct value
*arg
= args
[i
];
749 struct type
*type
= check_typedef (value_type (arg
));
750 /* The corresponding parameter that is pushed onto the
751 stack, and [possibly] passed in a register. */
752 gdb_byte param_val
[8];
754 memset (param_val
, 0, sizeof param_val
);
755 if (TYPE_LENGTH (type
) > 8)
757 /* Large parameter, pass by reference. Store the value
758 in "struct" area and then pass its address. */
760 struct_ptr
+= align_up (TYPE_LENGTH (type
), 8);
762 write_memory (struct_end
- struct_ptr
, value_contents (arg
),
764 store_unsigned_integer (param_val
, 4, byte_order
,
765 struct_end
- struct_ptr
);
767 else if (TYPE_CODE (type
) == TYPE_CODE_INT
768 || TYPE_CODE (type
) == TYPE_CODE_ENUM
)
770 /* Integer value store, right aligned. "unpack_long"
771 takes care of any sign-extension problems. */
772 param_len
= align_up (TYPE_LENGTH (type
), 4);
773 store_unsigned_integer (param_val
, param_len
, byte_order
,
775 value_contents (arg
)));
777 else if (TYPE_CODE (type
) == TYPE_CODE_FLT
)
779 /* Floating point value store, right aligned. */
780 param_len
= align_up (TYPE_LENGTH (type
), 4);
781 memcpy (param_val
, value_contents (arg
), param_len
);
785 param_len
= align_up (TYPE_LENGTH (type
), 4);
787 /* Small struct value are stored right-aligned. */
788 memcpy (param_val
+ param_len
- TYPE_LENGTH (type
),
789 value_contents (arg
), TYPE_LENGTH (type
));
791 /* Structures of size 5, 6 and 7 bytes are special in that
792 the higher-ordered word is stored in the lower-ordered
793 argument, and even though it is a 8-byte quantity the
794 registers need not be 8-byte aligned. */
795 if (param_len
> 4 && param_len
< 8)
799 param_ptr
+= param_len
;
800 if (param_len
== 8 && !small_struct
)
801 param_ptr
= align_up (param_ptr
, 8);
803 /* First 4 non-FP arguments are passed in gr26-gr23.
804 First 4 32-bit FP arguments are passed in fr4L-fr7L.
805 First 2 64-bit FP arguments are passed in fr5 and fr7.
807 The rest go on the stack, starting at sp-36, towards lower
808 addresses. 8-byte arguments must be aligned to a 8-byte
812 write_memory (param_end
- param_ptr
, param_val
, param_len
);
814 /* There are some cases when we don't know the type
815 expected by the callee (e.g. for variadic functions), so
816 pass the parameters in both general and fp regs. */
819 int grreg
= 26 - (param_ptr
- 36) / 4;
820 int fpLreg
= 72 + (param_ptr
- 36) / 4 * 2;
821 int fpreg
= 74 + (param_ptr
- 32) / 8 * 4;
823 regcache_cooked_write (regcache
, grreg
, param_val
);
824 regcache_cooked_write (regcache
, fpLreg
, param_val
);
828 regcache_cooked_write (regcache
, grreg
+ 1,
831 regcache_cooked_write (regcache
, fpreg
, param_val
);
832 regcache_cooked_write (regcache
, fpreg
+ 1,
839 /* Update the various stack pointers. */
842 struct_end
= sp
+ align_up (struct_ptr
, 64);
843 /* PARAM_PTR already accounts for all the arguments passed
844 by the user. However, the ABI mandates minimum stack
845 space allocations for outgoing arguments. The ABI also
846 mandates minimum stack alignments which we must
848 param_end
= struct_end
+ align_up (param_ptr
, 64);
852 /* If a structure has to be returned, set up register 28 to hold its
855 regcache_cooked_write_unsigned (regcache
, 28, struct_addr
);
857 gp
= tdep
->find_global_pointer (gdbarch
, function
);
860 regcache_cooked_write_unsigned (regcache
, 19, gp
);
862 /* Set the return address. */
863 if (!gdbarch_push_dummy_code_p (gdbarch
))
864 regcache_cooked_write_unsigned (regcache
, HPPA_RP_REGNUM
, bp_addr
);
866 /* Update the Stack Pointer. */
867 regcache_cooked_write_unsigned (regcache
, HPPA_SP_REGNUM
, param_end
);
872 /* The 64-bit PA-RISC calling conventions are documented in "64-Bit
873 Runtime Architecture for PA-RISC 2.0", which is distributed as part
874 as of the HP-UX Software Transition Kit (STK). This implementation
875 is based on version 3.3, dated October 6, 1997. */
877 /* Check whether TYPE is an "Integral or Pointer Scalar Type". */
880 hppa64_integral_or_pointer_p (const struct type
*type
)
882 switch (TYPE_CODE (type
))
888 case TYPE_CODE_RANGE
:
890 int len
= TYPE_LENGTH (type
);
891 return (len
== 1 || len
== 2 || len
== 4 || len
== 8);
895 case TYPE_CODE_RVALUE_REF
:
896 return (TYPE_LENGTH (type
) == 8);
904 /* Check whether TYPE is a "Floating Scalar Type". */
907 hppa64_floating_p (const struct type
*type
)
909 switch (TYPE_CODE (type
))
913 int len
= TYPE_LENGTH (type
);
914 return (len
== 4 || len
== 8 || len
== 16);
923 /* If CODE points to a function entry address, try to look up the corresponding
924 function descriptor and return its address instead. If CODE is not a
925 function entry address, then just return it unchanged. */
927 hppa64_convert_code_addr_to_fptr (struct gdbarch
*gdbarch
, CORE_ADDR code
)
929 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
930 struct obj_section
*sec
, *opd
;
932 sec
= find_pc_section (code
);
937 /* If CODE is in a data section, assume it's already a fptr. */
938 if (!(sec
->the_bfd_section
->flags
& SEC_CODE
))
941 ALL_OBJFILE_OSECTIONS (sec
->objfile
, opd
)
943 if (strcmp (opd
->the_bfd_section
->name
, ".opd") == 0)
947 if (opd
< sec
->objfile
->sections_end
)
951 for (addr
= obj_section_addr (opd
);
952 addr
< obj_section_endaddr (opd
);
958 if (target_read_memory (addr
, tmp
, sizeof (tmp
)))
960 opdaddr
= extract_unsigned_integer (tmp
, sizeof (tmp
), byte_order
);
971 hppa64_push_dummy_call (struct gdbarch
*gdbarch
, struct value
*function
,
972 struct regcache
*regcache
, CORE_ADDR bp_addr
,
973 int nargs
, struct value
**args
, CORE_ADDR sp
,
974 int struct_return
, CORE_ADDR struct_addr
)
976 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
977 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
981 /* "The outgoing parameter area [...] must be aligned at a 16-byte
983 sp
= align_up (sp
, 16);
985 for (i
= 0; i
< nargs
; i
++)
987 struct value
*arg
= args
[i
];
988 struct type
*type
= value_type (arg
);
989 int len
= TYPE_LENGTH (type
);
990 const bfd_byte
*valbuf
;
994 /* "Each parameter begins on a 64-bit (8-byte) boundary." */
995 offset
= align_up (offset
, 8);
997 if (hppa64_integral_or_pointer_p (type
))
999 /* "Integral scalar parameters smaller than 64 bits are
1000 padded on the left (i.e., the value is in the
1001 least-significant bits of the 64-bit storage unit, and
1002 the high-order bits are undefined)." Therefore we can
1003 safely sign-extend them. */
1006 arg
= value_cast (builtin_type (gdbarch
)->builtin_int64
, arg
);
1010 else if (hppa64_floating_p (type
))
1014 /* "Quad-precision (128-bit) floating-point scalar
1015 parameters are aligned on a 16-byte boundary." */
1016 offset
= align_up (offset
, 16);
1018 /* "Double-extended- and quad-precision floating-point
1019 parameters within the first 64 bytes of the parameter
1020 list are always passed in general registers." */
1026 /* "Single-precision (32-bit) floating-point scalar
1027 parameters are padded on the left with 32 bits of
1028 garbage (i.e., the floating-point value is in the
1029 least-significant 32 bits of a 64-bit storage
1034 /* "Single- and double-precision floating-point
1035 parameters in this area are passed according to the
1036 available formal parameter information in a function
1037 prototype. [...] If no prototype is in scope,
1038 floating-point parameters must be passed both in the
1039 corresponding general registers and in the
1040 corresponding floating-point registers." */
1041 regnum
= HPPA64_FP4_REGNUM
+ offset
/ 8;
1043 if (regnum
< HPPA64_FP4_REGNUM
+ 8)
1045 /* "Single-precision floating-point parameters, when
1046 passed in floating-point registers, are passed in
1047 the right halves of the floating point registers;
1048 the left halves are unused." */
1049 regcache_cooked_write_part (regcache
, regnum
, offset
% 8,
1050 len
, value_contents (arg
));
1058 /* "Aggregates larger than 8 bytes are aligned on a
1059 16-byte boundary, possibly leaving an unused argument
1060 slot, which is filled with garbage. If necessary,
1061 they are padded on the right (with garbage), to a
1062 multiple of 8 bytes." */
1063 offset
= align_up (offset
, 16);
1067 /* If we are passing a function pointer, make sure we pass a function
1068 descriptor instead of the function entry address. */
1069 if (TYPE_CODE (type
) == TYPE_CODE_PTR
1070 && TYPE_CODE (TYPE_TARGET_TYPE (type
)) == TYPE_CODE_FUNC
)
1072 ULONGEST codeptr
, fptr
;
1074 codeptr
= unpack_long (type
, value_contents (arg
));
1075 fptr
= hppa64_convert_code_addr_to_fptr (gdbarch
, codeptr
);
1076 store_unsigned_integer (fptrbuf
, TYPE_LENGTH (type
), byte_order
,
1082 valbuf
= value_contents (arg
);
1085 /* Always store the argument in memory. */
1086 write_memory (sp
+ offset
, valbuf
, len
);
1088 regnum
= HPPA_ARG0_REGNUM
- offset
/ 8;
1089 while (regnum
> HPPA_ARG0_REGNUM
- 8 && len
> 0)
1091 regcache_cooked_write_part (regcache
, regnum
,
1092 offset
% 8, std::min (len
, 8), valbuf
);
1093 offset
+= std::min (len
, 8);
1094 valbuf
+= std::min (len
, 8);
1095 len
-= std::min (len
, 8);
1102 /* Set up GR29 (%ret1) to hold the argument pointer (ap). */
1103 regcache_cooked_write_unsigned (regcache
, HPPA_RET1_REGNUM
, sp
+ 64);
1105 /* Allocate the outgoing parameter area. Make sure the outgoing
1106 parameter area is multiple of 16 bytes in length. */
1107 sp
+= std::max (align_up (offset
, 16), (ULONGEST
) 64);
1109 /* Allocate 32-bytes of scratch space. The documentation doesn't
1110 mention this, but it seems to be needed. */
1113 /* Allocate the frame marker area. */
1116 /* If a structure has to be returned, set up GR 28 (%ret0) to hold
1119 regcache_cooked_write_unsigned (regcache
, HPPA_RET0_REGNUM
, struct_addr
);
1121 /* Set up GR27 (%dp) to hold the global pointer (gp). */
1122 gp
= tdep
->find_global_pointer (gdbarch
, function
);
1124 regcache_cooked_write_unsigned (regcache
, HPPA_DP_REGNUM
, gp
);
1126 /* Set up GR2 (%rp) to hold the return pointer (rp). */
1127 if (!gdbarch_push_dummy_code_p (gdbarch
))
1128 regcache_cooked_write_unsigned (regcache
, HPPA_RP_REGNUM
, bp_addr
);
1130 /* Set up GR30 to hold the stack pointer (sp). */
1131 regcache_cooked_write_unsigned (regcache
, HPPA_SP_REGNUM
, sp
);
1137 /* Handle 32/64-bit struct return conventions. */
1139 static enum return_value_convention
1140 hppa32_return_value (struct gdbarch
*gdbarch
, struct value
*function
,
1141 struct type
*type
, struct regcache
*regcache
,
1142 gdb_byte
*readbuf
, const gdb_byte
*writebuf
)
1144 if (TYPE_LENGTH (type
) <= 2 * 4)
1146 /* The value always lives in the right hand end of the register
1147 (or register pair)? */
1149 int reg
= TYPE_CODE (type
) == TYPE_CODE_FLT
? HPPA_FP4_REGNUM
: 28;
1150 int part
= TYPE_LENGTH (type
) % 4;
1151 /* The left hand register contains only part of the value,
1152 transfer that first so that the rest can be xfered as entire
1153 4-byte registers. */
1156 if (readbuf
!= NULL
)
1157 regcache_cooked_read_part (regcache
, reg
, 4 - part
,
1159 if (writebuf
!= NULL
)
1160 regcache_cooked_write_part (regcache
, reg
, 4 - part
,
1164 /* Now transfer the remaining register values. */
1165 for (b
= part
; b
< TYPE_LENGTH (type
); b
+= 4)
1167 if (readbuf
!= NULL
)
1168 regcache_cooked_read (regcache
, reg
, readbuf
+ b
);
1169 if (writebuf
!= NULL
)
1170 regcache_cooked_write (regcache
, reg
, writebuf
+ b
);
1173 return RETURN_VALUE_REGISTER_CONVENTION
;
1176 return RETURN_VALUE_STRUCT_CONVENTION
;
1179 static enum return_value_convention
1180 hppa64_return_value (struct gdbarch
*gdbarch
, struct value
*function
,
1181 struct type
*type
, struct regcache
*regcache
,
1182 gdb_byte
*readbuf
, const gdb_byte
*writebuf
)
1184 int len
= TYPE_LENGTH (type
);
1189 /* All return values larget than 128 bits must be aggregate
1191 gdb_assert (!hppa64_integral_or_pointer_p (type
));
1192 gdb_assert (!hppa64_floating_p (type
));
1194 /* "Aggregate return values larger than 128 bits are returned in
1195 a buffer allocated by the caller. The address of the buffer
1196 must be passed in GR 28." */
1197 return RETURN_VALUE_STRUCT_CONVENTION
;
1200 if (hppa64_integral_or_pointer_p (type
))
1202 /* "Integral return values are returned in GR 28. Values
1203 smaller than 64 bits are padded on the left (with garbage)." */
1204 regnum
= HPPA_RET0_REGNUM
;
1207 else if (hppa64_floating_p (type
))
1211 /* "Double-extended- and quad-precision floating-point
1212 values are returned in GRs 28 and 29. The sign,
1213 exponent, and most-significant bits of the mantissa are
1214 returned in GR 28; the least-significant bits of the
1215 mantissa are passed in GR 29. For double-extended
1216 precision values, GR 29 is padded on the right with 48
1217 bits of garbage." */
1218 regnum
= HPPA_RET0_REGNUM
;
1223 /* "Single-precision and double-precision floating-point
1224 return values are returned in FR 4R (single precision) or
1225 FR 4 (double-precision)." */
1226 regnum
= HPPA64_FP4_REGNUM
;
1232 /* "Aggregate return values up to 64 bits in size are returned
1233 in GR 28. Aggregates smaller than 64 bits are left aligned
1234 in the register; the pad bits on the right are undefined."
1236 "Aggregate return values between 65 and 128 bits are returned
1237 in GRs 28 and 29. The first 64 bits are placed in GR 28, and
1238 the remaining bits are placed, left aligned, in GR 29. The
1239 pad bits on the right of GR 29 (if any) are undefined." */
1240 regnum
= HPPA_RET0_REGNUM
;
1248 regcache_cooked_read_part (regcache
, regnum
, offset
,
1249 std::min (len
, 8), readbuf
);
1250 readbuf
+= std::min (len
, 8);
1251 len
-= std::min (len
, 8);
1260 regcache_cooked_write_part (regcache
, regnum
, offset
,
1261 std::min (len
, 8), writebuf
);
1262 writebuf
+= std::min (len
, 8);
1263 len
-= std::min (len
, 8);
1268 return RETURN_VALUE_REGISTER_CONVENTION
;
1273 hppa32_convert_from_func_ptr_addr (struct gdbarch
*gdbarch
, CORE_ADDR addr
,
1274 struct target_ops
*targ
)
1278 struct type
*func_ptr_type
= builtin_type (gdbarch
)->builtin_func_ptr
;
1279 CORE_ADDR plabel
= addr
& ~3;
1280 return read_memory_typed_address (plabel
, func_ptr_type
);
1287 hppa32_frame_align (struct gdbarch
*gdbarch
, CORE_ADDR addr
)
1289 /* HP frames are 64-byte (or cache line) aligned (yes that's _byte_
1291 return align_up (addr
, 64);
1294 /* Force all frames to 16-byte alignment. Better safe than sorry. */
1297 hppa64_frame_align (struct gdbarch
*gdbarch
, CORE_ADDR addr
)
1299 /* Just always 16-byte align. */
1300 return align_up (addr
, 16);
1304 hppa_read_pc (readable_regcache
*regcache
)
1309 regcache
->cooked_read (HPPA_IPSW_REGNUM
, &ipsw
);
1310 regcache
->cooked_read (HPPA_PCOQ_HEAD_REGNUM
, &pc
);
1312 /* If the current instruction is nullified, then we are effectively
1313 still executing the previous instruction. Pretend we are still
1314 there. This is needed when single stepping; if the nullified
1315 instruction is on a different line, we don't want GDB to think
1316 we've stepped onto that line. */
1317 if (ipsw
& 0x00200000)
1324 hppa_write_pc (struct regcache
*regcache
, CORE_ADDR pc
)
1326 regcache_cooked_write_unsigned (regcache
, HPPA_PCOQ_HEAD_REGNUM
, pc
);
1327 regcache_cooked_write_unsigned (regcache
, HPPA_PCOQ_TAIL_REGNUM
, pc
+ 4);
1330 /* For the given instruction (INST), return any adjustment it makes
1331 to the stack pointer or zero for no adjustment.
1333 This only handles instructions commonly found in prologues. */
1336 prologue_inst_adjust_sp (unsigned long inst
)
1338 /* This must persist across calls. */
1339 static int save_high21
;
1341 /* The most common way to perform a stack adjustment ldo X(sp),sp */
1342 if ((inst
& 0xffffc000) == 0x37de0000)
1343 return hppa_extract_14 (inst
);
1346 if ((inst
& 0xffe00000) == 0x6fc00000)
1347 return hppa_extract_14 (inst
);
1349 /* std,ma X,D(sp) */
1350 if ((inst
& 0xffe00008) == 0x73c00008)
1351 return (inst
& 0x1 ? -(1 << 13) : 0) | (((inst
>> 4) & 0x3ff) << 3);
1353 /* addil high21,%r30; ldo low11,(%r1),%r30)
1354 save high bits in save_high21 for later use. */
1355 if ((inst
& 0xffe00000) == 0x2bc00000)
1357 save_high21
= hppa_extract_21 (inst
);
1361 if ((inst
& 0xffff0000) == 0x343e0000)
1362 return save_high21
+ hppa_extract_14 (inst
);
1364 /* fstws as used by the HP compilers. */
1365 if ((inst
& 0xffffffe0) == 0x2fd01220)
1366 return hppa_extract_5_load (inst
);
1368 /* No adjustment. */
1372 /* Return nonzero if INST is a branch of some kind, else return zero. */
1375 is_branch (unsigned long inst
)
1404 /* Return the register number for a GR which is saved by INST or
1405 zero if INST does not save a GR.
1410 https://parisc.wiki.kernel.org/images-parisc/6/68/Pa11_acd.pdf
1413 https://parisc.wiki.kernel.org/images-parisc/7/73/Parisc2.0.pdf
1415 According to Table 6-5 of Chapter 6 (Memory Reference Instructions)
1416 on page 106 in parisc 2.0, all instructions for storing values from
1417 the general registers are:
1419 Store: stb, sth, stw, std (according to Chapter 7, they
1420 are only in both "inst >> 26" and "inst >> 6".
1421 Store Absolute: stwa, stda (according to Chapter 7, they are only
1423 Store Bytes: stby, stdby (according to Chapter 7, they are
1424 only in "inst >> 6").
1426 For (inst >> 26), according to Chapter 7:
1428 The effective memory reference address is formed by the addition
1429 of an immediate displacement to a base value.
1431 - stb: 0x18, store a byte from a general register.
1433 - sth: 0x19, store a halfword from a general register.
1435 - stw: 0x1a, store a word from a general register.
1437 - stwm: 0x1b, store a word from a general register and perform base
1438 register modification (2.0 will still treate it as stw).
1440 - std: 0x1c, store a doubleword from a general register (2.0 only).
1442 - stw: 0x1f, store a word from a general register (2.0 only).
1444 For (inst >> 6) when ((inst >> 26) == 0x03), according to Chapter 7:
1446 The effective memory reference address is formed by the addition
1447 of an index value to a base value specified in the instruction.
1449 - stb: 0x08, store a byte from a general register (1.1 calls stbs).
1451 - sth: 0x09, store a halfword from a general register (1.1 calls
1454 - stw: 0x0a, store a word from a general register (1.1 calls stws).
1456 - std: 0x0b: store a doubleword from a general register (2.0 only)
1458 Implement fast byte moves (stores) to unaligned word or doubleword
1461 - stby: 0x0c, for unaligned word (1.1 calls stbys).
1463 - stdby: 0x0d for unaligned doubleword (2.0 only).
1465 Store a word or doubleword using an absolute memory address formed
1466 using short or long displacement or indexed
1468 - stwa: 0x0e, store a word from a general register to an absolute
1469 address (1.0 calls stwas).
1471 - stda: 0x0f, store a doubleword from a general register to an
1472 absolute address (2.0 only). */
1475 inst_saves_gr (unsigned long inst
)
1477 switch ((inst
>> 26) & 0x0f)
1480 switch ((inst
>> 6) & 0x0f)
1490 return hppa_extract_5R_store (inst
);
1499 /* no 0x1d or 0x1e -- according to parisc 2.0 document */
1501 return hppa_extract_5R_store (inst
);
1507 /* Return the register number for a FR which is saved by INST or
1508 zero it INST does not save a FR.
1510 Note we only care about full 64bit register stores (that's the only
1511 kind of stores the prologue will use).
1513 FIXME: What about argument stores with the HP compiler in ANSI mode? */
1516 inst_saves_fr (unsigned long inst
)
1518 /* Is this an FSTD? */
1519 if ((inst
& 0xfc00dfc0) == 0x2c001200)
1520 return hppa_extract_5r_store (inst
);
1521 if ((inst
& 0xfc000002) == 0x70000002)
1522 return hppa_extract_5R_store (inst
);
1523 /* Is this an FSTW? */
1524 if ((inst
& 0xfc00df80) == 0x24001200)
1525 return hppa_extract_5r_store (inst
);
1526 if ((inst
& 0xfc000002) == 0x7c000000)
1527 return hppa_extract_5R_store (inst
);
1531 /* Advance PC across any function entry prologue instructions
1532 to reach some "real" code.
1534 Use information in the unwind table to determine what exactly should
1535 be in the prologue. */
1539 skip_prologue_hard_way (struct gdbarch
*gdbarch
, CORE_ADDR pc
,
1540 int stop_before_branch
)
1542 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
1544 CORE_ADDR orig_pc
= pc
;
1545 unsigned long inst
, stack_remaining
, save_gr
, save_fr
, save_rp
, save_sp
;
1546 unsigned long args_stored
, status
, i
, restart_gr
, restart_fr
;
1547 struct unwind_table_entry
*u
;
1548 int final_iteration
;
1554 u
= find_unwind_entry (pc
);
1558 /* If we are not at the beginning of a function, then return now. */
1559 if ((pc
& ~0x3) != u
->region_start
)
1562 /* This is how much of a frame adjustment we need to account for. */
1563 stack_remaining
= u
->Total_frame_size
<< 3;
1565 /* Magic register saves we want to know about. */
1566 save_rp
= u
->Save_RP
;
1567 save_sp
= u
->Save_SP
;
1569 /* An indication that args may be stored into the stack. Unfortunately
1570 the HPUX compilers tend to set this in cases where no args were
1574 /* Turn the Entry_GR field into a bitmask. */
1576 for (i
= 3; i
< u
->Entry_GR
+ 3; i
++)
1578 /* Frame pointer gets saved into a special location. */
1579 if (u
->Save_SP
&& i
== HPPA_FP_REGNUM
)
1582 save_gr
|= (1 << i
);
1584 save_gr
&= ~restart_gr
;
1586 /* Turn the Entry_FR field into a bitmask too. */
1588 for (i
= 12; i
< u
->Entry_FR
+ 12; i
++)
1589 save_fr
|= (1 << i
);
1590 save_fr
&= ~restart_fr
;
1592 final_iteration
= 0;
1594 /* Loop until we find everything of interest or hit a branch.
1596 For unoptimized GCC code and for any HP CC code this will never ever
1597 examine any user instructions.
1599 For optimzied GCC code we're faced with problems. GCC will schedule
1600 its prologue and make prologue instructions available for delay slot
1601 filling. The end result is user code gets mixed in with the prologue
1602 and a prologue instruction may be in the delay slot of the first branch
1605 Some unexpected things are expected with debugging optimized code, so
1606 we allow this routine to walk past user instructions in optimized
1608 while (save_gr
|| save_fr
|| save_rp
|| save_sp
|| stack_remaining
> 0
1611 unsigned int reg_num
;
1612 unsigned long old_stack_remaining
, old_save_gr
, old_save_fr
;
1613 unsigned long old_save_rp
, old_save_sp
, next_inst
;
1615 /* Save copies of all the triggers so we can compare them later
1617 old_save_gr
= save_gr
;
1618 old_save_fr
= save_fr
;
1619 old_save_rp
= save_rp
;
1620 old_save_sp
= save_sp
;
1621 old_stack_remaining
= stack_remaining
;
1623 status
= target_read_memory (pc
, buf
, 4);
1624 inst
= extract_unsigned_integer (buf
, 4, byte_order
);
1630 /* Note the interesting effects of this instruction. */
1631 stack_remaining
-= prologue_inst_adjust_sp (inst
);
1633 /* There are limited ways to store the return pointer into the
1635 if (inst
== 0x6bc23fd9 || inst
== 0x0fc212c1 || inst
== 0x73c23fe1)
1638 /* These are the only ways we save SP into the stack. At this time
1639 the HP compilers never bother to save SP into the stack. */
1640 if ((inst
& 0xffffc000) == 0x6fc10000
1641 || (inst
& 0xffffc00c) == 0x73c10008)
1644 /* Are we loading some register with an offset from the argument
1646 if ((inst
& 0xffe00000) == 0x37a00000
1647 || (inst
& 0xffffffe0) == 0x081d0240)
1653 /* Account for general and floating-point register saves. */
1654 reg_num
= inst_saves_gr (inst
);
1655 save_gr
&= ~(1 << reg_num
);
1657 /* Ugh. Also account for argument stores into the stack.
1658 Unfortunately args_stored only tells us that some arguments
1659 where stored into the stack. Not how many or what kind!
1661 This is a kludge as on the HP compiler sets this bit and it
1662 never does prologue scheduling. So once we see one, skip past
1663 all of them. We have similar code for the fp arg stores below.
1665 FIXME. Can still die if we have a mix of GR and FR argument
1667 if (reg_num
>= (gdbarch_ptr_bit (gdbarch
) == 64 ? 19 : 23)
1670 while (reg_num
>= (gdbarch_ptr_bit (gdbarch
) == 64 ? 19 : 23)
1674 status
= target_read_memory (pc
, buf
, 4);
1675 inst
= extract_unsigned_integer (buf
, 4, byte_order
);
1678 reg_num
= inst_saves_gr (inst
);
1684 reg_num
= inst_saves_fr (inst
);
1685 save_fr
&= ~(1 << reg_num
);
1687 status
= target_read_memory (pc
+ 4, buf
, 4);
1688 next_inst
= extract_unsigned_integer (buf
, 4, byte_order
);
1694 /* We've got to be read to handle the ldo before the fp register
1696 if ((inst
& 0xfc000000) == 0x34000000
1697 && inst_saves_fr (next_inst
) >= 4
1698 && inst_saves_fr (next_inst
)
1699 <= (gdbarch_ptr_bit (gdbarch
) == 64 ? 11 : 7))
1701 /* So we drop into the code below in a reasonable state. */
1702 reg_num
= inst_saves_fr (next_inst
);
1706 /* Ugh. Also account for argument stores into the stack.
1707 This is a kludge as on the HP compiler sets this bit and it
1708 never does prologue scheduling. So once we see one, skip past
1711 && reg_num
<= (gdbarch_ptr_bit (gdbarch
) == 64 ? 11 : 7))
1715 <= (gdbarch_ptr_bit (gdbarch
) == 64 ? 11 : 7))
1718 status
= target_read_memory (pc
, buf
, 4);
1719 inst
= extract_unsigned_integer (buf
, 4, byte_order
);
1722 if ((inst
& 0xfc000000) != 0x34000000)
1724 status
= target_read_memory (pc
+ 4, buf
, 4);
1725 next_inst
= extract_unsigned_integer (buf
, 4, byte_order
);
1728 reg_num
= inst_saves_fr (next_inst
);
1734 /* Quit if we hit any kind of branch. This can happen if a prologue
1735 instruction is in the delay slot of the first call/branch. */
1736 if (is_branch (inst
) && stop_before_branch
)
1739 /* What a crock. The HP compilers set args_stored even if no
1740 arguments were stored into the stack (boo hiss). This could
1741 cause this code to then skip a bunch of user insns (up to the
1744 To combat this we try to identify when args_stored was bogusly
1745 set and clear it. We only do this when args_stored is nonzero,
1746 all other resources are accounted for, and nothing changed on
1749 && !(save_gr
|| save_fr
|| save_rp
|| save_sp
|| stack_remaining
> 0)
1750 && old_save_gr
== save_gr
&& old_save_fr
== save_fr
1751 && old_save_rp
== save_rp
&& old_save_sp
== save_sp
1752 && old_stack_remaining
== stack_remaining
)
1758 /* !stop_before_branch, so also look at the insn in the delay slot
1760 if (final_iteration
)
1762 if (is_branch (inst
))
1763 final_iteration
= 1;
1766 /* We've got a tenative location for the end of the prologue. However
1767 because of limitations in the unwind descriptor mechanism we may
1768 have went too far into user code looking for the save of a register
1769 that does not exist. So, if there registers we expected to be saved
1770 but never were, mask them out and restart.
1772 This should only happen in optimized code, and should be very rare. */
1773 if (save_gr
|| (save_fr
&& !(restart_fr
|| restart_gr
)))
1776 restart_gr
= save_gr
;
1777 restart_fr
= save_fr
;
1785 /* Return the address of the PC after the last prologue instruction if
1786 we can determine it from the debug symbols. Else return zero. */
1789 after_prologue (CORE_ADDR pc
)
1791 struct symtab_and_line sal
;
1792 CORE_ADDR func_addr
, func_end
;
1794 /* If we can not find the symbol in the partial symbol table, then
1795 there is no hope we can determine the function's start address
1797 if (!find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
1800 /* Get the line associated with FUNC_ADDR. */
1801 sal
= find_pc_line (func_addr
, 0);
1803 /* There are only two cases to consider. First, the end of the source line
1804 is within the function bounds. In that case we return the end of the
1805 source line. Second is the end of the source line extends beyond the
1806 bounds of the current function. We need to use the slow code to
1807 examine instructions in that case.
1809 Anything else is simply a bug elsewhere. Fixing it here is absolutely
1810 the wrong thing to do. In fact, it should be entirely possible for this
1811 function to always return zero since the slow instruction scanning code
1812 is supposed to *always* work. If it does not, then it is a bug. */
1813 if (sal
.end
< func_end
)
1819 /* To skip prologues, I use this predicate. Returns either PC itself
1820 if the code at PC does not look like a function prologue; otherwise
1821 returns an address that (if we're lucky) follows the prologue.
1823 hppa_skip_prologue is called by gdb to place a breakpoint in a function.
1824 It doesn't necessarily skips all the insns in the prologue. In fact
1825 we might not want to skip all the insns because a prologue insn may
1826 appear in the delay slot of the first branch, and we don't want to
1827 skip over the branch in that case. */
1830 hppa_skip_prologue (struct gdbarch
*gdbarch
, CORE_ADDR pc
)
1832 CORE_ADDR post_prologue_pc
;
1834 /* See if we can determine the end of the prologue via the symbol table.
1835 If so, then return either PC, or the PC after the prologue, whichever
1838 post_prologue_pc
= after_prologue (pc
);
1840 /* If after_prologue returned a useful address, then use it. Else
1841 fall back on the instruction skipping code.
1843 Some folks have claimed this causes problems because the breakpoint
1844 may be the first instruction of the prologue. If that happens, then
1845 the instruction skipping code has a bug that needs to be fixed. */
1846 if (post_prologue_pc
!= 0)
1847 return std::max (pc
, post_prologue_pc
);
1849 return (skip_prologue_hard_way (gdbarch
, pc
, 1));
1852 /* Return an unwind entry that falls within the frame's code block. */
1854 static struct unwind_table_entry
*
1855 hppa_find_unwind_entry_in_block (struct frame_info
*this_frame
)
1857 CORE_ADDR pc
= get_frame_address_in_block (this_frame
);
1859 /* FIXME drow/20070101: Calling gdbarch_addr_bits_remove on the
1860 result of get_frame_address_in_block implies a problem.
1861 The bits should have been removed earlier, before the return
1862 value of gdbarch_unwind_pc. That might be happening already;
1863 if it isn't, it should be fixed. Then this call can be
1865 pc
= gdbarch_addr_bits_remove (get_frame_arch (this_frame
), pc
);
1866 return find_unwind_entry (pc
);
1869 struct hppa_frame_cache
1872 struct trad_frame_saved_reg
*saved_regs
;
1875 static struct hppa_frame_cache
*
1876 hppa_frame_cache (struct frame_info
*this_frame
, void **this_cache
)
1878 struct gdbarch
*gdbarch
= get_frame_arch (this_frame
);
1879 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
1880 int word_size
= gdbarch_ptr_bit (gdbarch
) / 8;
1881 struct hppa_frame_cache
*cache
;
1885 struct unwind_table_entry
*u
;
1886 CORE_ADDR prologue_end
;
1891 fprintf_unfiltered (gdb_stdlog
, "{ hppa_frame_cache (frame=%d) -> ",
1892 frame_relative_level(this_frame
));
1894 if ((*this_cache
) != NULL
)
1897 fprintf_unfiltered (gdb_stdlog
, "base=%s (cached) }",
1898 paddress (gdbarch
, ((struct hppa_frame_cache
*)*this_cache
)->base
));
1899 return (struct hppa_frame_cache
*) (*this_cache
);
1901 cache
= FRAME_OBSTACK_ZALLOC (struct hppa_frame_cache
);
1902 (*this_cache
) = cache
;
1903 cache
->saved_regs
= trad_frame_alloc_saved_regs (this_frame
);
1906 u
= hppa_find_unwind_entry_in_block (this_frame
);
1910 fprintf_unfiltered (gdb_stdlog
, "base=NULL (no unwind entry) }");
1911 return (struct hppa_frame_cache
*) (*this_cache
);
1914 /* Turn the Entry_GR field into a bitmask. */
1916 for (i
= 3; i
< u
->Entry_GR
+ 3; i
++)
1918 /* Frame pointer gets saved into a special location. */
1919 if (u
->Save_SP
&& i
== HPPA_FP_REGNUM
)
1922 saved_gr_mask
|= (1 << i
);
1925 /* Turn the Entry_FR field into a bitmask too. */
1927 for (i
= 12; i
< u
->Entry_FR
+ 12; i
++)
1928 saved_fr_mask
|= (1 << i
);
1930 /* Loop until we find everything of interest or hit a branch.
1932 For unoptimized GCC code and for any HP CC code this will never ever
1933 examine any user instructions.
1935 For optimized GCC code we're faced with problems. GCC will schedule
1936 its prologue and make prologue instructions available for delay slot
1937 filling. The end result is user code gets mixed in with the prologue
1938 and a prologue instruction may be in the delay slot of the first branch
1941 Some unexpected things are expected with debugging optimized code, so
1942 we allow this routine to walk past user instructions in optimized
1945 int final_iteration
= 0;
1946 CORE_ADDR pc
, start_pc
, end_pc
;
1947 int looking_for_sp
= u
->Save_SP
;
1948 int looking_for_rp
= u
->Save_RP
;
1951 /* We have to use skip_prologue_hard_way instead of just
1952 skip_prologue_using_sal, in case we stepped into a function without
1953 symbol information. hppa_skip_prologue also bounds the returned
1954 pc by the passed in pc, so it will not return a pc in the next
1957 We used to call hppa_skip_prologue to find the end of the prologue,
1958 but if some non-prologue instructions get scheduled into the prologue,
1959 and the program is compiled with debug information, the "easy" way
1960 in hppa_skip_prologue will return a prologue end that is too early
1961 for us to notice any potential frame adjustments. */
1963 /* We used to use get_frame_func to locate the beginning of the
1964 function to pass to skip_prologue. However, when objects are
1965 compiled without debug symbols, get_frame_func can return the wrong
1966 function (or 0). We can do better than that by using unwind records.
1967 This only works if the Region_description of the unwind record
1968 indicates that it includes the entry point of the function.
1969 HP compilers sometimes generate unwind records for regions that
1970 do not include the entry or exit point of a function. GNU tools
1973 if ((u
->Region_description
& 0x2) == 0)
1974 start_pc
= u
->region_start
;
1976 start_pc
= get_frame_func (this_frame
);
1978 prologue_end
= skip_prologue_hard_way (gdbarch
, start_pc
, 0);
1979 end_pc
= get_frame_pc (this_frame
);
1981 if (prologue_end
!= 0 && end_pc
> prologue_end
)
1982 end_pc
= prologue_end
;
1987 ((saved_gr_mask
|| saved_fr_mask
1988 || looking_for_sp
|| looking_for_rp
1989 || frame_size
< (u
->Total_frame_size
<< 3))
1997 if (!safe_frame_unwind_memory (this_frame
, pc
, buf4
, sizeof buf4
))
1999 error (_("Cannot read instruction at %s."),
2000 paddress (gdbarch
, pc
));
2001 return (struct hppa_frame_cache
*) (*this_cache
);
2004 inst
= extract_unsigned_integer (buf4
, sizeof buf4
, byte_order
);
2006 /* Note the interesting effects of this instruction. */
2007 frame_size
+= prologue_inst_adjust_sp (inst
);
2009 /* There are limited ways to store the return pointer into the
2011 if (inst
== 0x6bc23fd9) /* stw rp,-0x14(sr0,sp) */
2014 cache
->saved_regs
[HPPA_RP_REGNUM
].addr
= -20;
2016 else if (inst
== 0x6bc23fd1) /* stw rp,-0x18(sr0,sp) */
2019 cache
->saved_regs
[HPPA_RP_REGNUM
].addr
= -24;
2021 else if (inst
== 0x0fc212c1
2022 || inst
== 0x73c23fe1) /* std rp,-0x10(sr0,sp) */
2025 cache
->saved_regs
[HPPA_RP_REGNUM
].addr
= -16;
2028 /* Check to see if we saved SP into the stack. This also
2029 happens to indicate the location of the saved frame
2031 if ((inst
& 0xffffc000) == 0x6fc10000 /* stw,ma r1,N(sr0,sp) */
2032 || (inst
& 0xffffc00c) == 0x73c10008) /* std,ma r1,N(sr0,sp) */
2035 cache
->saved_regs
[HPPA_FP_REGNUM
].addr
= 0;
2037 else if (inst
== 0x08030241) /* copy %r3, %r1 */
2042 /* Account for general and floating-point register saves. */
2043 reg
= inst_saves_gr (inst
);
2044 if (reg
>= 3 && reg
<= 18
2045 && (!u
->Save_SP
|| reg
!= HPPA_FP_REGNUM
))
2047 saved_gr_mask
&= ~(1 << reg
);
2048 if ((inst
>> 26) == 0x1b && hppa_extract_14 (inst
) >= 0)
2049 /* stwm with a positive displacement is a _post_
2051 cache
->saved_regs
[reg
].addr
= 0;
2052 else if ((inst
& 0xfc00000c) == 0x70000008)
2053 /* A std has explicit post_modify forms. */
2054 cache
->saved_regs
[reg
].addr
= 0;
2059 if ((inst
>> 26) == 0x1c)
2060 offset
= (inst
& 0x1 ? -(1 << 13) : 0)
2061 | (((inst
>> 4) & 0x3ff) << 3);
2062 else if ((inst
>> 26) == 0x03)
2063 offset
= hppa_low_hppa_sign_extend (inst
& 0x1f, 5);
2065 offset
= hppa_extract_14 (inst
);
2067 /* Handle code with and without frame pointers. */
2069 cache
->saved_regs
[reg
].addr
= offset
;
2071 cache
->saved_regs
[reg
].addr
2072 = (u
->Total_frame_size
<< 3) + offset
;
2076 /* GCC handles callee saved FP regs a little differently.
2078 It emits an instruction to put the value of the start of
2079 the FP store area into %r1. It then uses fstds,ma with a
2080 basereg of %r1 for the stores.
2082 HP CC emits them at the current stack pointer modifying the
2083 stack pointer as it stores each register. */
2085 /* ldo X(%r3),%r1 or ldo X(%r30),%r1. */
2086 if ((inst
& 0xffffc000) == 0x34610000
2087 || (inst
& 0xffffc000) == 0x37c10000)
2088 fp_loc
= hppa_extract_14 (inst
);
2090 reg
= inst_saves_fr (inst
);
2091 if (reg
>= 12 && reg
<= 21)
2093 /* Note +4 braindamage below is necessary because the FP
2094 status registers are internally 8 registers rather than
2095 the expected 4 registers. */
2096 saved_fr_mask
&= ~(1 << reg
);
2099 /* 1st HP CC FP register store. After this
2100 instruction we've set enough state that the GCC and
2101 HPCC code are both handled in the same manner. */
2102 cache
->saved_regs
[reg
+ HPPA_FP4_REGNUM
+ 4].addr
= 0;
2107 cache
->saved_regs
[reg
+ HPPA_FP0_REGNUM
+ 4].addr
= fp_loc
;
2112 /* Quit if we hit any kind of branch the previous iteration. */
2113 if (final_iteration
)
2115 /* We want to look precisely one instruction beyond the branch
2116 if we have not found everything yet. */
2117 if (is_branch (inst
))
2118 final_iteration
= 1;
2123 /* The frame base always represents the value of %sp at entry to
2124 the current function (and is thus equivalent to the "saved"
2126 CORE_ADDR this_sp
= get_frame_register_unsigned (this_frame
,
2131 fprintf_unfiltered (gdb_stdlog
, " (this_sp=%s, pc=%s, "
2132 "prologue_end=%s) ",
2133 paddress (gdbarch
, this_sp
),
2134 paddress (gdbarch
, get_frame_pc (this_frame
)),
2135 paddress (gdbarch
, prologue_end
));
2137 /* Check to see if a frame pointer is available, and use it for
2138 frame unwinding if it is.
2140 There are some situations where we need to rely on the frame
2141 pointer to do stack unwinding. For example, if a function calls
2142 alloca (), the stack pointer can get adjusted inside the body of
2143 the function. In this case, the ABI requires that the compiler
2144 maintain a frame pointer for the function.
2146 The unwind record has a flag (alloca_frame) that indicates that
2147 a function has a variable frame; unfortunately, gcc/binutils
2148 does not set this flag. Instead, whenever a frame pointer is used
2149 and saved on the stack, the Save_SP flag is set. We use this to
2150 decide whether to use the frame pointer for unwinding.
2152 TODO: For the HP compiler, maybe we should use the alloca_frame flag
2153 instead of Save_SP. */
2155 fp
= get_frame_register_unsigned (this_frame
, HPPA_FP_REGNUM
);
2157 if (u
->alloca_frame
)
2158 fp
-= u
->Total_frame_size
<< 3;
2160 if (get_frame_pc (this_frame
) >= prologue_end
2161 && (u
->Save_SP
|| u
->alloca_frame
) && fp
!= 0)
2166 fprintf_unfiltered (gdb_stdlog
, " (base=%s) [frame pointer]",
2167 paddress (gdbarch
, cache
->base
));
2170 && trad_frame_addr_p (cache
->saved_regs
, HPPA_SP_REGNUM
))
2172 /* Both we're expecting the SP to be saved and the SP has been
2173 saved. The entry SP value is saved at this frame's SP
2175 cache
->base
= read_memory_integer (this_sp
, word_size
, byte_order
);
2178 fprintf_unfiltered (gdb_stdlog
, " (base=%s) [saved]",
2179 paddress (gdbarch
, cache
->base
));
2183 /* The prologue has been slowly allocating stack space. Adjust
2185 cache
->base
= this_sp
- frame_size
;
2187 fprintf_unfiltered (gdb_stdlog
, " (base=%s) [unwind adjust]",
2188 paddress (gdbarch
, cache
->base
));
2191 trad_frame_set_value (cache
->saved_regs
, HPPA_SP_REGNUM
, cache
->base
);
2194 /* The PC is found in the "return register", "Millicode" uses "r31"
2195 as the return register while normal code uses "rp". */
2198 if (trad_frame_addr_p (cache
->saved_regs
, 31))
2200 cache
->saved_regs
[HPPA_PCOQ_HEAD_REGNUM
] = cache
->saved_regs
[31];
2202 fprintf_unfiltered (gdb_stdlog
, " (pc=r31) [stack] } ");
2206 ULONGEST r31
= get_frame_register_unsigned (this_frame
, 31);
2207 trad_frame_set_value (cache
->saved_regs
, HPPA_PCOQ_HEAD_REGNUM
, r31
);
2209 fprintf_unfiltered (gdb_stdlog
, " (pc=r31) [frame] } ");
2214 if (trad_frame_addr_p (cache
->saved_regs
, HPPA_RP_REGNUM
))
2216 cache
->saved_regs
[HPPA_PCOQ_HEAD_REGNUM
] =
2217 cache
->saved_regs
[HPPA_RP_REGNUM
];
2219 fprintf_unfiltered (gdb_stdlog
, " (pc=rp) [stack] } ");
2223 ULONGEST rp
= get_frame_register_unsigned (this_frame
,
2225 trad_frame_set_value (cache
->saved_regs
, HPPA_PCOQ_HEAD_REGNUM
, rp
);
2227 fprintf_unfiltered (gdb_stdlog
, " (pc=rp) [frame] } ");
2231 /* If Save_SP is set, then we expect the frame pointer to be saved in the
2232 frame. However, there is a one-insn window where we haven't saved it
2233 yet, but we've already clobbered it. Detect this case and fix it up.
2235 The prologue sequence for frame-pointer functions is:
2236 0: stw %rp, -20(%sp)
2239 c: stw,ma %r1, XX(%sp)
2241 So if we are at offset c, the r3 value that we want is not yet saved
2242 on the stack, but it's been overwritten. The prologue analyzer will
2243 set fp_in_r1 when it sees the copy insn so we know to get the value
2245 if (u
->Save_SP
&& !trad_frame_addr_p (cache
->saved_regs
, HPPA_FP_REGNUM
)
2248 ULONGEST r1
= get_frame_register_unsigned (this_frame
, 1);
2249 trad_frame_set_value (cache
->saved_regs
, HPPA_FP_REGNUM
, r1
);
2253 /* Convert all the offsets into addresses. */
2255 for (reg
= 0; reg
< gdbarch_num_regs (gdbarch
); reg
++)
2257 if (trad_frame_addr_p (cache
->saved_regs
, reg
))
2258 cache
->saved_regs
[reg
].addr
+= cache
->base
;
2263 struct gdbarch_tdep
*tdep
;
2265 tdep
= gdbarch_tdep (gdbarch
);
2267 if (tdep
->unwind_adjust_stub
)
2268 tdep
->unwind_adjust_stub (this_frame
, cache
->base
, cache
->saved_regs
);
2272 fprintf_unfiltered (gdb_stdlog
, "base=%s }",
2273 paddress (gdbarch
, ((struct hppa_frame_cache
*)*this_cache
)->base
));
2274 return (struct hppa_frame_cache
*) (*this_cache
);
2278 hppa_frame_this_id (struct frame_info
*this_frame
, void **this_cache
,
2279 struct frame_id
*this_id
)
2281 struct hppa_frame_cache
*info
;
2282 struct unwind_table_entry
*u
;
2284 info
= hppa_frame_cache (this_frame
, this_cache
);
2285 u
= hppa_find_unwind_entry_in_block (this_frame
);
2287 (*this_id
) = frame_id_build (info
->base
, u
->region_start
);
2290 static struct value
*
2291 hppa_frame_prev_register (struct frame_info
*this_frame
,
2292 void **this_cache
, int regnum
)
2294 struct hppa_frame_cache
*info
= hppa_frame_cache (this_frame
, this_cache
);
2296 return hppa_frame_prev_register_helper (this_frame
,
2297 info
->saved_regs
, regnum
);
2301 hppa_frame_unwind_sniffer (const struct frame_unwind
*self
,
2302 struct frame_info
*this_frame
, void **this_cache
)
2304 if (hppa_find_unwind_entry_in_block (this_frame
))
2310 static const struct frame_unwind hppa_frame_unwind
=
2313 default_frame_unwind_stop_reason
,
2315 hppa_frame_prev_register
,
2317 hppa_frame_unwind_sniffer
2320 /* This is a generic fallback frame unwinder that kicks in if we fail all
2321 the other ones. Normally we would expect the stub and regular unwinder
2322 to work, but in some cases we might hit a function that just doesn't
2323 have any unwind information available. In this case we try to do
2324 unwinding solely based on code reading. This is obviously going to be
2325 slow, so only use this as a last resort. Currently this will only
2326 identify the stack and pc for the frame. */
2328 static struct hppa_frame_cache
*
2329 hppa_fallback_frame_cache (struct frame_info
*this_frame
, void **this_cache
)
2331 struct gdbarch
*gdbarch
= get_frame_arch (this_frame
);
2332 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2333 struct hppa_frame_cache
*cache
;
2334 unsigned int frame_size
= 0;
2339 fprintf_unfiltered (gdb_stdlog
,
2340 "{ hppa_fallback_frame_cache (frame=%d) -> ",
2341 frame_relative_level (this_frame
));
2343 cache
= FRAME_OBSTACK_ZALLOC (struct hppa_frame_cache
);
2344 (*this_cache
) = cache
;
2345 cache
->saved_regs
= trad_frame_alloc_saved_regs (this_frame
);
2347 start_pc
= get_frame_func (this_frame
);
2350 CORE_ADDR cur_pc
= get_frame_pc (this_frame
);
2353 for (pc
= start_pc
; pc
< cur_pc
; pc
+= 4)
2357 insn
= read_memory_unsigned_integer (pc
, 4, byte_order
);
2358 frame_size
+= prologue_inst_adjust_sp (insn
);
2360 /* There are limited ways to store the return pointer into the
2362 if (insn
== 0x6bc23fd9) /* stw rp,-0x14(sr0,sp) */
2364 cache
->saved_regs
[HPPA_RP_REGNUM
].addr
= -20;
2367 else if (insn
== 0x0fc212c1
2368 || insn
== 0x73c23fe1) /* std rp,-0x10(sr0,sp) */
2370 cache
->saved_regs
[HPPA_RP_REGNUM
].addr
= -16;
2377 fprintf_unfiltered (gdb_stdlog
, " frame_size=%d, found_rp=%d }\n",
2378 frame_size
, found_rp
);
2380 cache
->base
= get_frame_register_unsigned (this_frame
, HPPA_SP_REGNUM
);
2381 cache
->base
-= frame_size
;
2382 trad_frame_set_value (cache
->saved_regs
, HPPA_SP_REGNUM
, cache
->base
);
2384 if (trad_frame_addr_p (cache
->saved_regs
, HPPA_RP_REGNUM
))
2386 cache
->saved_regs
[HPPA_RP_REGNUM
].addr
+= cache
->base
;
2387 cache
->saved_regs
[HPPA_PCOQ_HEAD_REGNUM
] =
2388 cache
->saved_regs
[HPPA_RP_REGNUM
];
2393 rp
= get_frame_register_unsigned (this_frame
, HPPA_RP_REGNUM
);
2394 trad_frame_set_value (cache
->saved_regs
, HPPA_PCOQ_HEAD_REGNUM
, rp
);
2401 hppa_fallback_frame_this_id (struct frame_info
*this_frame
, void **this_cache
,
2402 struct frame_id
*this_id
)
2404 struct hppa_frame_cache
*info
=
2405 hppa_fallback_frame_cache (this_frame
, this_cache
);
2407 (*this_id
) = frame_id_build (info
->base
, get_frame_func (this_frame
));
2410 static struct value
*
2411 hppa_fallback_frame_prev_register (struct frame_info
*this_frame
,
2412 void **this_cache
, int regnum
)
2414 struct hppa_frame_cache
*info
2415 = hppa_fallback_frame_cache (this_frame
, this_cache
);
2417 return hppa_frame_prev_register_helper (this_frame
,
2418 info
->saved_regs
, regnum
);
2421 static const struct frame_unwind hppa_fallback_frame_unwind
=
2424 default_frame_unwind_stop_reason
,
2425 hppa_fallback_frame_this_id
,
2426 hppa_fallback_frame_prev_register
,
2428 default_frame_sniffer
2431 /* Stub frames, used for all kinds of call stubs. */
2432 struct hppa_stub_unwind_cache
2435 struct trad_frame_saved_reg
*saved_regs
;
2438 static struct hppa_stub_unwind_cache
*
2439 hppa_stub_frame_unwind_cache (struct frame_info
*this_frame
,
2442 struct gdbarch
*gdbarch
= get_frame_arch (this_frame
);
2443 struct hppa_stub_unwind_cache
*info
;
2444 struct unwind_table_entry
*u
;
2447 return (struct hppa_stub_unwind_cache
*) *this_cache
;
2449 info
= FRAME_OBSTACK_ZALLOC (struct hppa_stub_unwind_cache
);
2451 info
->saved_regs
= trad_frame_alloc_saved_regs (this_frame
);
2453 info
->base
= get_frame_register_unsigned (this_frame
, HPPA_SP_REGNUM
);
2455 /* By default we assume that stubs do not change the rp. */
2456 info
->saved_regs
[HPPA_PCOQ_HEAD_REGNUM
].realreg
= HPPA_RP_REGNUM
;
2462 hppa_stub_frame_this_id (struct frame_info
*this_frame
,
2463 void **this_prologue_cache
,
2464 struct frame_id
*this_id
)
2466 struct hppa_stub_unwind_cache
*info
2467 = hppa_stub_frame_unwind_cache (this_frame
, this_prologue_cache
);
2470 *this_id
= frame_id_build (info
->base
, get_frame_func (this_frame
));
2473 static struct value
*
2474 hppa_stub_frame_prev_register (struct frame_info
*this_frame
,
2475 void **this_prologue_cache
, int regnum
)
2477 struct hppa_stub_unwind_cache
*info
2478 = hppa_stub_frame_unwind_cache (this_frame
, this_prologue_cache
);
2481 error (_("Requesting registers from null frame."));
2483 return hppa_frame_prev_register_helper (this_frame
,
2484 info
->saved_regs
, regnum
);
2488 hppa_stub_unwind_sniffer (const struct frame_unwind
*self
,
2489 struct frame_info
*this_frame
,
2492 CORE_ADDR pc
= get_frame_address_in_block (this_frame
);
2493 struct gdbarch
*gdbarch
= get_frame_arch (this_frame
);
2494 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
2497 || (tdep
->in_solib_call_trampoline
!= NULL
2498 && tdep
->in_solib_call_trampoline (gdbarch
, pc
))
2499 || gdbarch_in_solib_return_trampoline (gdbarch
, pc
, NULL
))
2504 static const struct frame_unwind hppa_stub_frame_unwind
= {
2506 default_frame_unwind_stop_reason
,
2507 hppa_stub_frame_this_id
,
2508 hppa_stub_frame_prev_register
,
2510 hppa_stub_unwind_sniffer
2513 static struct frame_id
2514 hppa_dummy_id (struct gdbarch
*gdbarch
, struct frame_info
*this_frame
)
2516 return frame_id_build (get_frame_register_unsigned (this_frame
,
2518 get_frame_pc (this_frame
));
2522 hppa_unwind_pc (struct gdbarch
*gdbarch
, struct frame_info
*next_frame
)
2527 ipsw
= frame_unwind_register_unsigned (next_frame
, HPPA_IPSW_REGNUM
);
2528 pc
= frame_unwind_register_unsigned (next_frame
, HPPA_PCOQ_HEAD_REGNUM
);
2530 /* If the current instruction is nullified, then we are effectively
2531 still executing the previous instruction. Pretend we are still
2532 there. This is needed when single stepping; if the nullified
2533 instruction is on a different line, we don't want GDB to think
2534 we've stepped onto that line. */
2535 if (ipsw
& 0x00200000)
2541 /* Return the minimal symbol whose name is NAME and stub type is STUB_TYPE.
2542 Return NULL if no such symbol was found. */
2544 struct bound_minimal_symbol
2545 hppa_lookup_stub_minimal_symbol (const char *name
,
2546 enum unwind_stub_types stub_type
)
2548 struct objfile
*objfile
;
2549 struct minimal_symbol
*msym
;
2550 struct bound_minimal_symbol result
= { NULL
, NULL
};
2552 ALL_MSYMBOLS (objfile
, msym
)
2554 if (strcmp (MSYMBOL_LINKAGE_NAME (msym
), name
) == 0)
2556 struct unwind_table_entry
*u
;
2558 u
= find_unwind_entry (MSYMBOL_VALUE (msym
));
2559 if (u
!= NULL
&& u
->stub_unwind
.stub_type
== stub_type
)
2561 result
.objfile
= objfile
;
2562 result
.minsym
= msym
;
2572 unwind_command (const char *exp
, int from_tty
)
2575 struct unwind_table_entry
*u
;
2577 /* If we have an expression, evaluate it and use it as the address. */
2579 if (exp
!= 0 && *exp
!= 0)
2580 address
= parse_and_eval_address (exp
);
2584 u
= find_unwind_entry (address
);
2588 printf_unfiltered ("Can't find unwind table entry for %s\n", exp
);
2592 printf_unfiltered ("unwind_table_entry (%s):\n", host_address_to_string (u
));
2594 printf_unfiltered ("\tregion_start = %s\n", hex_string (u
->region_start
));
2595 gdb_flush (gdb_stdout
);
2597 printf_unfiltered ("\tregion_end = %s\n", hex_string (u
->region_end
));
2598 gdb_flush (gdb_stdout
);
2600 #define pif(FLD) if (u->FLD) printf_unfiltered (" "#FLD);
2602 printf_unfiltered ("\n\tflags =");
2603 pif (Cannot_unwind
);
2605 pif (Millicode_save_sr0
);
2608 pif (Variable_Frame
);
2609 pif (Separate_Package_Body
);
2610 pif (Frame_Extension_Millicode
);
2611 pif (Stack_Overflow_Check
);
2612 pif (Two_Instruction_SP_Increment
);
2615 pif (cxx_try_catch
);
2616 pif (sched_entry_seq
);
2619 pif (Save_MRP_in_frame
);
2621 pif (Cleanup_defined
);
2622 pif (MPE_XL_interrupt_marker
);
2623 pif (HP_UX_interrupt_marker
);
2627 putchar_unfiltered ('\n');
2629 #define pin(FLD) printf_unfiltered ("\t"#FLD" = 0x%x\n", u->FLD);
2631 pin (Region_description
);
2634 pin (Total_frame_size
);
2636 if (u
->stub_unwind
.stub_type
)
2638 printf_unfiltered ("\tstub type = ");
2639 switch (u
->stub_unwind
.stub_type
)
2642 printf_unfiltered ("long branch\n");
2644 case PARAMETER_RELOCATION
:
2645 printf_unfiltered ("parameter relocation\n");
2648 printf_unfiltered ("export\n");
2651 printf_unfiltered ("import\n");
2654 printf_unfiltered ("import shlib\n");
2657 printf_unfiltered ("unknown (%d)\n", u
->stub_unwind
.stub_type
);
2662 /* Return the GDB type object for the "standard" data type of data in
2665 static struct type
*
2666 hppa32_register_type (struct gdbarch
*gdbarch
, int regnum
)
2668 if (regnum
< HPPA_FP4_REGNUM
)
2669 return builtin_type (gdbarch
)->builtin_uint32
;
2671 return builtin_type (gdbarch
)->builtin_float
;
2674 static struct type
*
2675 hppa64_register_type (struct gdbarch
*gdbarch
, int regnum
)
2677 if (regnum
< HPPA64_FP4_REGNUM
)
2678 return builtin_type (gdbarch
)->builtin_uint64
;
2680 return builtin_type (gdbarch
)->builtin_double
;
2683 /* Return non-zero if REGNUM is not a register available to the user
2684 through ptrace/ttrace. */
2687 hppa32_cannot_store_register (struct gdbarch
*gdbarch
, int regnum
)
2690 || regnum
== HPPA_PCSQ_HEAD_REGNUM
2691 || (regnum
>= HPPA_PCSQ_TAIL_REGNUM
&& regnum
< HPPA_IPSW_REGNUM
)
2692 || (regnum
> HPPA_IPSW_REGNUM
&& regnum
< HPPA_FP4_REGNUM
));
2696 hppa32_cannot_fetch_register (struct gdbarch
*gdbarch
, int regnum
)
2698 /* cr26 and cr27 are readable (but not writable) from userspace. */
2699 if (regnum
== HPPA_CR26_REGNUM
|| regnum
== HPPA_CR27_REGNUM
)
2702 return hppa32_cannot_store_register (gdbarch
, regnum
);
2706 hppa64_cannot_store_register (struct gdbarch
*gdbarch
, int regnum
)
2709 || regnum
== HPPA_PCSQ_HEAD_REGNUM
2710 || (regnum
>= HPPA_PCSQ_TAIL_REGNUM
&& regnum
< HPPA_IPSW_REGNUM
)
2711 || (regnum
> HPPA_IPSW_REGNUM
&& regnum
< HPPA64_FP4_REGNUM
));
2715 hppa64_cannot_fetch_register (struct gdbarch
*gdbarch
, int regnum
)
2717 /* cr26 and cr27 are readable (but not writable) from userspace. */
2718 if (regnum
== HPPA_CR26_REGNUM
|| regnum
== HPPA_CR27_REGNUM
)
2721 return hppa64_cannot_store_register (gdbarch
, regnum
);
2725 hppa_addr_bits_remove (struct gdbarch
*gdbarch
, CORE_ADDR addr
)
2727 /* The low two bits of the PC on the PA contain the privilege level.
2728 Some genius implementing a (non-GCC) compiler apparently decided
2729 this means that "addresses" in a text section therefore include a
2730 privilege level, and thus symbol tables should contain these bits.
2731 This seems like a bonehead thing to do--anyway, it seems to work
2732 for our purposes to just ignore those bits. */
2734 return (addr
&= ~0x3);
2737 /* Get the ARGIth function argument for the current function. */
2740 hppa_fetch_pointer_argument (struct frame_info
*frame
, int argi
,
2743 return get_frame_register_unsigned (frame
, HPPA_R0_REGNUM
+ 26 - argi
);
2746 static enum register_status
2747 hppa_pseudo_register_read (struct gdbarch
*gdbarch
, readable_regcache
*regcache
,
2748 int regnum
, gdb_byte
*buf
)
2750 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2752 enum register_status status
;
2754 status
= regcache
->raw_read (regnum
, &tmp
);
2755 if (status
== REG_VALID
)
2757 if (regnum
== HPPA_PCOQ_HEAD_REGNUM
|| regnum
== HPPA_PCOQ_TAIL_REGNUM
)
2759 store_unsigned_integer (buf
, sizeof tmp
, byte_order
, tmp
);
2765 hppa_find_global_pointer (struct gdbarch
*gdbarch
, struct value
*function
)
2771 hppa_frame_prev_register_helper (struct frame_info
*this_frame
,
2772 struct trad_frame_saved_reg saved_regs
[],
2775 struct gdbarch
*arch
= get_frame_arch (this_frame
);
2776 enum bfd_endian byte_order
= gdbarch_byte_order (arch
);
2778 if (regnum
== HPPA_PCOQ_TAIL_REGNUM
)
2780 int size
= register_size (arch
, HPPA_PCOQ_HEAD_REGNUM
);
2782 struct value
*pcoq_val
=
2783 trad_frame_get_prev_register (this_frame
, saved_regs
,
2784 HPPA_PCOQ_HEAD_REGNUM
);
2786 pc
= extract_unsigned_integer (value_contents_all (pcoq_val
),
2788 return frame_unwind_got_constant (this_frame
, regnum
, pc
+ 4);
2791 return trad_frame_get_prev_register (this_frame
, saved_regs
, regnum
);
2795 /* An instruction to match. */
2798 unsigned int data
; /* See if it matches this.... */
2799 unsigned int mask
; /* ... with this mask. */
2802 /* See bfd/elf32-hppa.c */
2803 static struct insn_pattern hppa_long_branch_stub
[] = {
2804 /* ldil LR'xxx,%r1 */
2805 { 0x20200000, 0xffe00000 },
2806 /* be,n RR'xxx(%sr4,%r1) */
2807 { 0xe0202002, 0xffe02002 },
2811 static struct insn_pattern hppa_long_branch_pic_stub
[] = {
2813 { 0xe8200000, 0xffe00000 },
2814 /* addil LR'xxx - ($PIC_pcrel$0 - 4), %r1 */
2815 { 0x28200000, 0xffe00000 },
2816 /* be,n RR'xxxx - ($PIC_pcrel$0 - 8)(%sr4, %r1) */
2817 { 0xe0202002, 0xffe02002 },
2821 static struct insn_pattern hppa_import_stub
[] = {
2822 /* addil LR'xxx, %dp */
2823 { 0x2b600000, 0xffe00000 },
2824 /* ldw RR'xxx(%r1), %r21 */
2825 { 0x48350000, 0xffffb000 },
2827 { 0xeaa0c000, 0xffffffff },
2828 /* ldw RR'xxx+4(%r1), %r19 */
2829 { 0x48330000, 0xffffb000 },
2833 static struct insn_pattern hppa_import_pic_stub
[] = {
2834 /* addil LR'xxx,%r19 */
2835 { 0x2a600000, 0xffe00000 },
2836 /* ldw RR'xxx(%r1),%r21 */
2837 { 0x48350000, 0xffffb000 },
2839 { 0xeaa0c000, 0xffffffff },
2840 /* ldw RR'xxx+4(%r1),%r19 */
2841 { 0x48330000, 0xffffb000 },
2845 static struct insn_pattern hppa_plt_stub
[] = {
2846 /* b,l 1b, %r20 - 1b is 3 insns before here */
2847 { 0xea9f1fdd, 0xffffffff },
2848 /* depi 0,31,2,%r20 */
2849 { 0xd6801c1e, 0xffffffff },
2853 /* Maximum number of instructions on the patterns above. */
2854 #define HPPA_MAX_INSN_PATTERN_LEN 4
2856 /* Return non-zero if the instructions at PC match the series
2857 described in PATTERN, or zero otherwise. PATTERN is an array of
2858 'struct insn_pattern' objects, terminated by an entry whose mask is
2861 When the match is successful, fill INSN[i] with what PATTERN[i]
2865 hppa_match_insns (struct gdbarch
*gdbarch
, CORE_ADDR pc
,
2866 struct insn_pattern
*pattern
, unsigned int *insn
)
2868 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2872 for (i
= 0; pattern
[i
].mask
; i
++)
2874 gdb_byte buf
[HPPA_INSN_SIZE
];
2876 target_read_memory (npc
, buf
, HPPA_INSN_SIZE
);
2877 insn
[i
] = extract_unsigned_integer (buf
, HPPA_INSN_SIZE
, byte_order
);
2878 if ((insn
[i
] & pattern
[i
].mask
) == pattern
[i
].data
)
2887 /* This relaxed version of the insstruction matcher allows us to match
2888 from somewhere inside the pattern, by looking backwards in the
2889 instruction scheme. */
2892 hppa_match_insns_relaxed (struct gdbarch
*gdbarch
, CORE_ADDR pc
,
2893 struct insn_pattern
*pattern
, unsigned int *insn
)
2895 int offset
, len
= 0;
2897 while (pattern
[len
].mask
)
2900 for (offset
= 0; offset
< len
; offset
++)
2901 if (hppa_match_insns (gdbarch
, pc
- offset
* HPPA_INSN_SIZE
,
2909 hppa_in_dyncall (CORE_ADDR pc
)
2911 struct unwind_table_entry
*u
;
2913 u
= find_unwind_entry (hppa_symbol_address ("$$dyncall"));
2917 return (pc
>= u
->region_start
&& pc
<= u
->region_end
);
2921 hppa_in_solib_call_trampoline (struct gdbarch
*gdbarch
, CORE_ADDR pc
)
2923 unsigned int insn
[HPPA_MAX_INSN_PATTERN_LEN
];
2924 struct unwind_table_entry
*u
;
2926 if (in_plt_section (pc
) || hppa_in_dyncall (pc
))
2929 /* The GNU toolchain produces linker stubs without unwind
2930 information. Since the pattern matching for linker stubs can be
2931 quite slow, so bail out if we do have an unwind entry. */
2933 u
= find_unwind_entry (pc
);
2938 (hppa_match_insns_relaxed (gdbarch
, pc
, hppa_import_stub
, insn
)
2939 || hppa_match_insns_relaxed (gdbarch
, pc
, hppa_import_pic_stub
, insn
)
2940 || hppa_match_insns_relaxed (gdbarch
, pc
, hppa_long_branch_stub
, insn
)
2941 || hppa_match_insns_relaxed (gdbarch
, pc
,
2942 hppa_long_branch_pic_stub
, insn
));
2945 /* This code skips several kind of "trampolines" used on PA-RISC
2946 systems: $$dyncall, import stubs and PLT stubs. */
2949 hppa_skip_trampoline_code (struct frame_info
*frame
, CORE_ADDR pc
)
2951 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
2952 struct type
*func_ptr_type
= builtin_type (gdbarch
)->builtin_func_ptr
;
2954 unsigned int insn
[HPPA_MAX_INSN_PATTERN_LEN
];
2957 /* $$dyncall handles both PLABELs and direct addresses. */
2958 if (hppa_in_dyncall (pc
))
2960 pc
= get_frame_register_unsigned (frame
, HPPA_R0_REGNUM
+ 22);
2962 /* PLABELs have bit 30 set; if it's a PLABEL, then dereference it. */
2964 pc
= read_memory_typed_address (pc
& ~0x3, func_ptr_type
);
2969 dp_rel
= hppa_match_insns (gdbarch
, pc
, hppa_import_stub
, insn
);
2970 if (dp_rel
|| hppa_match_insns (gdbarch
, pc
, hppa_import_pic_stub
, insn
))
2972 /* Extract the target address from the addil/ldw sequence. */
2973 pc
= hppa_extract_21 (insn
[0]) + hppa_extract_14 (insn
[1]);
2976 pc
+= get_frame_register_unsigned (frame
, HPPA_DP_REGNUM
);
2978 pc
+= get_frame_register_unsigned (frame
, HPPA_R0_REGNUM
+ 19);
2983 if (in_plt_section (pc
))
2985 pc
= read_memory_typed_address (pc
, func_ptr_type
);
2987 /* If the PLT slot has not yet been resolved, the target will be
2989 if (in_plt_section (pc
))
2991 /* Sanity check: are we pointing to the PLT stub? */
2992 if (!hppa_match_insns (gdbarch
, pc
, hppa_plt_stub
, insn
))
2994 warning (_("Cannot resolve PLT stub at %s."),
2995 paddress (gdbarch
, pc
));
2999 /* This should point to the fixup routine. */
3000 pc
= read_memory_typed_address (pc
+ 8, func_ptr_type
);
3008 /* Here is a table of C type sizes on hppa with various compiles
3009 and options. I measured this on PA 9000/800 with HP-UX 11.11
3010 and these compilers:
3012 /usr/ccs/bin/cc HP92453-01 A.11.01.21
3013 /opt/ansic/bin/cc HP92453-01 B.11.11.28706.GP
3014 /opt/aCC/bin/aCC B3910B A.03.45
3015 gcc gcc 3.3.2 native hppa2.0w-hp-hpux11.11
3017 cc : 1 2 4 4 8 : 4 8 -- : 4 4
3018 ansic +DA1.1 : 1 2 4 4 8 : 4 8 16 : 4 4
3019 ansic +DA2.0 : 1 2 4 4 8 : 4 8 16 : 4 4
3020 ansic +DA2.0W : 1 2 4 8 8 : 4 8 16 : 8 8
3021 acc +DA1.1 : 1 2 4 4 8 : 4 8 16 : 4 4
3022 acc +DA2.0 : 1 2 4 4 8 : 4 8 16 : 4 4
3023 acc +DA2.0W : 1 2 4 8 8 : 4 8 16 : 8 8
3024 gcc : 1 2 4 4 8 : 4 8 16 : 4 4
3028 compiler and options
3029 char, short, int, long, long long
3030 float, double, long double
3033 So all these compilers use either ILP32 or LP64 model.
3034 TODO: gcc has more options so it needs more investigation.
3036 For floating point types, see:
3038 http://docs.hp.com/hpux/pdf/B3906-90006.pdf
3039 HP-UX floating-point guide, hpux 11.00
3041 -- chastain 2003-12-18 */
3043 static struct gdbarch
*
3044 hppa_gdbarch_init (struct gdbarch_info info
, struct gdbarch_list
*arches
)
3046 struct gdbarch_tdep
*tdep
;
3047 struct gdbarch
*gdbarch
;
3049 /* find a candidate among the list of pre-declared architectures. */
3050 arches
= gdbarch_list_lookup_by_info (arches
, &info
);
3052 return (arches
->gdbarch
);
3054 /* If none found, then allocate and initialize one. */
3055 tdep
= XCNEW (struct gdbarch_tdep
);
3056 gdbarch
= gdbarch_alloc (&info
, tdep
);
3058 /* Determine from the bfd_arch_info structure if we are dealing with
3059 a 32 or 64 bits architecture. If the bfd_arch_info is not available,
3060 then default to a 32bit machine. */
3061 if (info
.bfd_arch_info
!= NULL
)
3062 tdep
->bytes_per_address
=
3063 info
.bfd_arch_info
->bits_per_address
/ info
.bfd_arch_info
->bits_per_byte
;
3065 tdep
->bytes_per_address
= 4;
3067 tdep
->find_global_pointer
= hppa_find_global_pointer
;
3069 /* Some parts of the gdbarch vector depend on whether we are running
3070 on a 32 bits or 64 bits target. */
3071 switch (tdep
->bytes_per_address
)
3074 set_gdbarch_num_regs (gdbarch
, hppa32_num_regs
);
3075 set_gdbarch_register_name (gdbarch
, hppa32_register_name
);
3076 set_gdbarch_register_type (gdbarch
, hppa32_register_type
);
3077 set_gdbarch_cannot_store_register (gdbarch
,
3078 hppa32_cannot_store_register
);
3079 set_gdbarch_cannot_fetch_register (gdbarch
,
3080 hppa32_cannot_fetch_register
);
3083 set_gdbarch_num_regs (gdbarch
, hppa64_num_regs
);
3084 set_gdbarch_register_name (gdbarch
, hppa64_register_name
);
3085 set_gdbarch_register_type (gdbarch
, hppa64_register_type
);
3086 set_gdbarch_dwarf2_reg_to_regnum (gdbarch
, hppa64_dwarf_reg_to_regnum
);
3087 set_gdbarch_cannot_store_register (gdbarch
,
3088 hppa64_cannot_store_register
);
3089 set_gdbarch_cannot_fetch_register (gdbarch
,
3090 hppa64_cannot_fetch_register
);
3093 internal_error (__FILE__
, __LINE__
, _("Unsupported address size: %d"),
3094 tdep
->bytes_per_address
);
3097 set_gdbarch_long_bit (gdbarch
, tdep
->bytes_per_address
* TARGET_CHAR_BIT
);
3098 set_gdbarch_ptr_bit (gdbarch
, tdep
->bytes_per_address
* TARGET_CHAR_BIT
);
3100 /* The following gdbarch vector elements are the same in both ILP32
3101 and LP64, but might show differences some day. */
3102 set_gdbarch_long_long_bit (gdbarch
, 64);
3103 set_gdbarch_long_double_bit (gdbarch
, 128);
3104 set_gdbarch_long_double_format (gdbarch
, floatformats_ia64_quad
);
3106 /* The following gdbarch vector elements do not depend on the address
3107 size, or in any other gdbarch element previously set. */
3108 set_gdbarch_skip_prologue (gdbarch
, hppa_skip_prologue
);
3109 set_gdbarch_stack_frame_destroyed_p (gdbarch
,
3110 hppa_stack_frame_destroyed_p
);
3111 set_gdbarch_inner_than (gdbarch
, core_addr_greaterthan
);
3112 set_gdbarch_sp_regnum (gdbarch
, HPPA_SP_REGNUM
);
3113 set_gdbarch_fp0_regnum (gdbarch
, HPPA_FP0_REGNUM
);
3114 set_gdbarch_addr_bits_remove (gdbarch
, hppa_addr_bits_remove
);
3115 set_gdbarch_believe_pcc_promotion (gdbarch
, 1);
3116 set_gdbarch_read_pc (gdbarch
, hppa_read_pc
);
3117 set_gdbarch_write_pc (gdbarch
, hppa_write_pc
);
3119 /* Helper for function argument information. */
3120 set_gdbarch_fetch_pointer_argument (gdbarch
, hppa_fetch_pointer_argument
);
3122 /* When a hardware watchpoint triggers, we'll move the inferior past
3123 it by removing all eventpoints; stepping past the instruction
3124 that caused the trigger; reinserting eventpoints; and checking
3125 whether any watched location changed. */
3126 set_gdbarch_have_nonsteppable_watchpoint (gdbarch
, 1);
3128 /* Inferior function call methods. */
3129 switch (tdep
->bytes_per_address
)
3132 set_gdbarch_push_dummy_call (gdbarch
, hppa32_push_dummy_call
);
3133 set_gdbarch_frame_align (gdbarch
, hppa32_frame_align
);
3134 set_gdbarch_convert_from_func_ptr_addr
3135 (gdbarch
, hppa32_convert_from_func_ptr_addr
);
3138 set_gdbarch_push_dummy_call (gdbarch
, hppa64_push_dummy_call
);
3139 set_gdbarch_frame_align (gdbarch
, hppa64_frame_align
);
3142 internal_error (__FILE__
, __LINE__
, _("bad switch"));
3145 /* Struct return methods. */
3146 switch (tdep
->bytes_per_address
)
3149 set_gdbarch_return_value (gdbarch
, hppa32_return_value
);
3152 set_gdbarch_return_value (gdbarch
, hppa64_return_value
);
3155 internal_error (__FILE__
, __LINE__
, _("bad switch"));
3158 set_gdbarch_breakpoint_kind_from_pc (gdbarch
, hppa_breakpoint::kind_from_pc
);
3159 set_gdbarch_sw_breakpoint_from_kind (gdbarch
, hppa_breakpoint::bp_from_kind
);
3160 set_gdbarch_pseudo_register_read (gdbarch
, hppa_pseudo_register_read
);
3162 /* Frame unwind methods. */
3163 set_gdbarch_dummy_id (gdbarch
, hppa_dummy_id
);
3164 set_gdbarch_unwind_pc (gdbarch
, hppa_unwind_pc
);
3166 /* Hook in ABI-specific overrides, if they have been registered. */
3167 gdbarch_init_osabi (info
, gdbarch
);
3169 /* Hook in the default unwinders. */
3170 frame_unwind_append_unwinder (gdbarch
, &hppa_stub_frame_unwind
);
3171 frame_unwind_append_unwinder (gdbarch
, &hppa_frame_unwind
);
3172 frame_unwind_append_unwinder (gdbarch
, &hppa_fallback_frame_unwind
);
3178 hppa_dump_tdep (struct gdbarch
*gdbarch
, struct ui_file
*file
)
3180 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
3182 fprintf_unfiltered (file
, "bytes_per_address = %d\n",
3183 tdep
->bytes_per_address
);
3184 fprintf_unfiltered (file
, "elf = %s\n", tdep
->is_elf
? "yes" : "no");
3188 _initialize_hppa_tdep (void)
3190 gdbarch_register (bfd_arch_hppa
, hppa_gdbarch_init
, hppa_dump_tdep
);
3192 hppa_objfile_priv_data
= register_objfile_data ();
3194 add_cmd ("unwind", class_maintenance
, unwind_command
,
3195 _("Print unwind table entry at given address."),
3196 &maintenanceprintlist
);
3198 /* Debug this files internals. */
3199 add_setshow_boolean_cmd ("hppa", class_maintenance
, &hppa_debug
, _("\
3200 Set whether hppa target specific debugging information should be displayed."),
3202 Show whether hppa target specific debugging information is displayed."), _("\
3203 This flag controls whether hppa target specific debugging information is\n\
3204 displayed. This information is particularly useful for debugging frame\n\
3205 unwinding problems."),
3207 NULL
, /* FIXME: i18n: hppa debug flag is %s. */
3208 &setdebuglist
, &showdebuglist
);