1 /* Target-dependent code for the HP PA-RISC architecture.
3 Copyright (C) 1986-1987, 1989-1996, 1998-2005, 2007-2012 Free
4 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 3 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, see <http://www.gnu.org/licenses/>. */
28 #include "completer.h"
30 #include "gdb_assert.h"
31 #include "arch-utils.h"
32 /* For argument passing to the inferior. */
35 #include "trad-frame.h"
36 #include "frame-unwind.h"
37 #include "frame-base.h"
43 #include "hppa-tdep.h"
45 static int hppa_debug
= 0;
47 /* Some local constants. */
48 static const int hppa32_num_regs
= 128;
49 static const int hppa64_num_regs
= 96;
51 /* hppa-specific object data -- unwind and solib info.
52 TODO/maybe: think about splitting this into two parts; the unwind data is
53 common to all hppa targets, but is only used in this file; we can register
54 that separately and make this static. The solib data is probably hpux-
55 specific, so we can create a separate extern objfile_data that is registered
56 by hppa-hpux-tdep.c and shared with pa64solib.c and somsolib.c. */
57 const struct objfile_data
*hppa_objfile_priv_data
= NULL
;
59 /* Get at various relevent fields of an instruction word. */
62 #define MASK_14 0x3fff
63 #define MASK_21 0x1fffff
65 /* Sizes (in bytes) of the native unwind entries. */
66 #define UNWIND_ENTRY_SIZE 16
67 #define STUB_UNWIND_ENTRY_SIZE 8
69 /* Routines to extract various sized constants out of hppa
72 /* This assumes that no garbage lies outside of the lower bits of
76 hppa_sign_extend (unsigned val
, unsigned bits
)
78 return (int) (val
>> (bits
- 1) ? (-1 << bits
) | val
: val
);
81 /* For many immediate values the sign bit is the low bit! */
84 hppa_low_hppa_sign_extend (unsigned val
, unsigned bits
)
86 return (int) ((val
& 0x1 ? (-1 << (bits
- 1)) : 0) | val
>> 1);
89 /* Extract the bits at positions between FROM and TO, using HP's numbering
93 hppa_get_field (unsigned word
, int from
, int to
)
95 return ((word
) >> (31 - (to
)) & ((1 << ((to
) - (from
) + 1)) - 1));
98 /* Extract the immediate field from a ld{bhw}s instruction. */
101 hppa_extract_5_load (unsigned word
)
103 return hppa_low_hppa_sign_extend (word
>> 16 & MASK_5
, 5);
106 /* Extract the immediate field from a break instruction. */
109 hppa_extract_5r_store (unsigned word
)
111 return (word
& MASK_5
);
114 /* Extract the immediate field from a {sr}sm instruction. */
117 hppa_extract_5R_store (unsigned word
)
119 return (word
>> 16 & MASK_5
);
122 /* Extract a 14 bit immediate field. */
125 hppa_extract_14 (unsigned word
)
127 return hppa_low_hppa_sign_extend (word
& MASK_14
, 14);
130 /* Extract a 21 bit constant. */
133 hppa_extract_21 (unsigned word
)
139 val
= hppa_get_field (word
, 20, 20);
141 val
|= hppa_get_field (word
, 9, 19);
143 val
|= hppa_get_field (word
, 5, 6);
145 val
|= hppa_get_field (word
, 0, 4);
147 val
|= hppa_get_field (word
, 7, 8);
148 return hppa_sign_extend (val
, 21) << 11;
151 /* extract a 17 bit constant from branch instructions, returning the
152 19 bit signed value. */
155 hppa_extract_17 (unsigned word
)
157 return hppa_sign_extend (hppa_get_field (word
, 19, 28) |
158 hppa_get_field (word
, 29, 29) << 10 |
159 hppa_get_field (word
, 11, 15) << 11 |
160 (word
& 0x1) << 16, 17) << 2;
164 hppa_symbol_address(const char *sym
)
166 struct minimal_symbol
*minsym
;
168 minsym
= lookup_minimal_symbol (sym
, NULL
, NULL
);
170 return SYMBOL_VALUE_ADDRESS (minsym
);
172 return (CORE_ADDR
)-1;
175 struct hppa_objfile_private
*
176 hppa_init_objfile_priv_data (struct objfile
*objfile
)
178 struct hppa_objfile_private
*priv
;
180 priv
= (struct hppa_objfile_private
*)
181 obstack_alloc (&objfile
->objfile_obstack
,
182 sizeof (struct hppa_objfile_private
));
183 set_objfile_data (objfile
, hppa_objfile_priv_data
, priv
);
184 memset (priv
, 0, sizeof (*priv
));
190 /* Compare the start address for two unwind entries returning 1 if
191 the first address is larger than the second, -1 if the second is
192 larger than the first, and zero if they are equal. */
195 compare_unwind_entries (const void *arg1
, const void *arg2
)
197 const struct unwind_table_entry
*a
= arg1
;
198 const struct unwind_table_entry
*b
= arg2
;
200 if (a
->region_start
> b
->region_start
)
202 else if (a
->region_start
< b
->region_start
)
209 record_text_segment_lowaddr (bfd
*abfd
, asection
*section
, void *data
)
211 if ((section
->flags
& (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
))
212 == (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
))
214 bfd_vma value
= section
->vma
- section
->filepos
;
215 CORE_ADDR
*low_text_segment_address
= (CORE_ADDR
*)data
;
217 if (value
< *low_text_segment_address
)
218 *low_text_segment_address
= value
;
223 internalize_unwinds (struct objfile
*objfile
, struct unwind_table_entry
*table
,
224 asection
*section
, unsigned int entries
,
225 unsigned int size
, CORE_ADDR text_offset
)
227 /* We will read the unwind entries into temporary memory, then
228 fill in the actual unwind table. */
232 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
235 char *buf
= alloca (size
);
236 CORE_ADDR low_text_segment_address
;
238 /* For ELF targets, then unwinds are supposed to
239 be segment relative offsets instead of absolute addresses.
241 Note that when loading a shared library (text_offset != 0) the
242 unwinds are already relative to the text_offset that will be
244 if (gdbarch_tdep (gdbarch
)->is_elf
&& text_offset
== 0)
246 low_text_segment_address
= -1;
248 bfd_map_over_sections (objfile
->obfd
,
249 record_text_segment_lowaddr
,
250 &low_text_segment_address
);
252 text_offset
= low_text_segment_address
;
254 else if (gdbarch_tdep (gdbarch
)->solib_get_text_base
)
256 text_offset
= gdbarch_tdep (gdbarch
)->solib_get_text_base (objfile
);
259 bfd_get_section_contents (objfile
->obfd
, section
, buf
, 0, size
);
261 /* Now internalize the information being careful to handle host/target
263 for (i
= 0; i
< entries
; i
++)
265 table
[i
].region_start
= bfd_get_32 (objfile
->obfd
,
267 table
[i
].region_start
+= text_offset
;
269 table
[i
].region_end
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) buf
);
270 table
[i
].region_end
+= text_offset
;
272 tmp
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) buf
);
274 table
[i
].Cannot_unwind
= (tmp
>> 31) & 0x1;
275 table
[i
].Millicode
= (tmp
>> 30) & 0x1;
276 table
[i
].Millicode_save_sr0
= (tmp
>> 29) & 0x1;
277 table
[i
].Region_description
= (tmp
>> 27) & 0x3;
278 table
[i
].reserved
= (tmp
>> 26) & 0x1;
279 table
[i
].Entry_SR
= (tmp
>> 25) & 0x1;
280 table
[i
].Entry_FR
= (tmp
>> 21) & 0xf;
281 table
[i
].Entry_GR
= (tmp
>> 16) & 0x1f;
282 table
[i
].Args_stored
= (tmp
>> 15) & 0x1;
283 table
[i
].Variable_Frame
= (tmp
>> 14) & 0x1;
284 table
[i
].Separate_Package_Body
= (tmp
>> 13) & 0x1;
285 table
[i
].Frame_Extension_Millicode
= (tmp
>> 12) & 0x1;
286 table
[i
].Stack_Overflow_Check
= (tmp
>> 11) & 0x1;
287 table
[i
].Two_Instruction_SP_Increment
= (tmp
>> 10) & 0x1;
288 table
[i
].sr4export
= (tmp
>> 9) & 0x1;
289 table
[i
].cxx_info
= (tmp
>> 8) & 0x1;
290 table
[i
].cxx_try_catch
= (tmp
>> 7) & 0x1;
291 table
[i
].sched_entry_seq
= (tmp
>> 6) & 0x1;
292 table
[i
].reserved1
= (tmp
>> 5) & 0x1;
293 table
[i
].Save_SP
= (tmp
>> 4) & 0x1;
294 table
[i
].Save_RP
= (tmp
>> 3) & 0x1;
295 table
[i
].Save_MRP_in_frame
= (tmp
>> 2) & 0x1;
296 table
[i
].save_r19
= (tmp
>> 1) & 0x1;
297 table
[i
].Cleanup_defined
= tmp
& 0x1;
298 tmp
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) buf
);
300 table
[i
].MPE_XL_interrupt_marker
= (tmp
>> 31) & 0x1;
301 table
[i
].HP_UX_interrupt_marker
= (tmp
>> 30) & 0x1;
302 table
[i
].Large_frame
= (tmp
>> 29) & 0x1;
303 table
[i
].alloca_frame
= (tmp
>> 28) & 0x1;
304 table
[i
].reserved2
= (tmp
>> 27) & 0x1;
305 table
[i
].Total_frame_size
= tmp
& 0x7ffffff;
307 /* Stub unwinds are handled elsewhere. */
308 table
[i
].stub_unwind
.stub_type
= 0;
309 table
[i
].stub_unwind
.padding
= 0;
314 /* Read in the backtrace information stored in the `$UNWIND_START$' section of
315 the object file. This info is used mainly by find_unwind_entry() to find
316 out the stack frame size and frame pointer used by procedures. We put
317 everything on the psymbol obstack in the objfile so that it automatically
318 gets freed when the objfile is destroyed. */
321 read_unwind_info (struct objfile
*objfile
)
323 asection
*unwind_sec
, *stub_unwind_sec
;
324 unsigned unwind_size
, stub_unwind_size
, total_size
;
325 unsigned index
, unwind_entries
;
326 unsigned stub_entries
, total_entries
;
327 CORE_ADDR text_offset
;
328 struct hppa_unwind_info
*ui
;
329 struct hppa_objfile_private
*obj_private
;
331 text_offset
= ANOFFSET (objfile
->section_offsets
, 0);
332 ui
= (struct hppa_unwind_info
*) obstack_alloc (&objfile
->objfile_obstack
,
333 sizeof (struct hppa_unwind_info
));
339 /* For reasons unknown the HP PA64 tools generate multiple unwinder
340 sections in a single executable. So we just iterate over every
341 section in the BFD looking for unwinder sections intead of trying
342 to do a lookup with bfd_get_section_by_name.
344 First determine the total size of the unwind tables so that we
345 can allocate memory in a nice big hunk. */
347 for (unwind_sec
= objfile
->obfd
->sections
;
349 unwind_sec
= unwind_sec
->next
)
351 if (strcmp (unwind_sec
->name
, "$UNWIND_START$") == 0
352 || strcmp (unwind_sec
->name
, ".PARISC.unwind") == 0)
354 unwind_size
= bfd_section_size (objfile
->obfd
, unwind_sec
);
355 unwind_entries
= unwind_size
/ UNWIND_ENTRY_SIZE
;
357 total_entries
+= unwind_entries
;
361 /* Now compute the size of the stub unwinds. Note the ELF tools do not
362 use stub unwinds at the current time. */
363 stub_unwind_sec
= bfd_get_section_by_name (objfile
->obfd
, "$UNWIND_END$");
367 stub_unwind_size
= bfd_section_size (objfile
->obfd
, stub_unwind_sec
);
368 stub_entries
= stub_unwind_size
/ STUB_UNWIND_ENTRY_SIZE
;
372 stub_unwind_size
= 0;
376 /* Compute total number of unwind entries and their total size. */
377 total_entries
+= stub_entries
;
378 total_size
= total_entries
* sizeof (struct unwind_table_entry
);
380 /* Allocate memory for the unwind table. */
381 ui
->table
= (struct unwind_table_entry
*)
382 obstack_alloc (&objfile
->objfile_obstack
, total_size
);
383 ui
->last
= total_entries
- 1;
385 /* Now read in each unwind section and internalize the standard unwind
388 for (unwind_sec
= objfile
->obfd
->sections
;
390 unwind_sec
= unwind_sec
->next
)
392 if (strcmp (unwind_sec
->name
, "$UNWIND_START$") == 0
393 || strcmp (unwind_sec
->name
, ".PARISC.unwind") == 0)
395 unwind_size
= bfd_section_size (objfile
->obfd
, unwind_sec
);
396 unwind_entries
= unwind_size
/ UNWIND_ENTRY_SIZE
;
398 internalize_unwinds (objfile
, &ui
->table
[index
], unwind_sec
,
399 unwind_entries
, unwind_size
, text_offset
);
400 index
+= unwind_entries
;
404 /* Now read in and internalize the stub unwind entries. */
405 if (stub_unwind_size
> 0)
408 char *buf
= alloca (stub_unwind_size
);
410 /* Read in the stub unwind entries. */
411 bfd_get_section_contents (objfile
->obfd
, stub_unwind_sec
, buf
,
412 0, stub_unwind_size
);
414 /* Now convert them into regular unwind entries. */
415 for (i
= 0; i
< stub_entries
; i
++, index
++)
417 /* Clear out the next unwind entry. */
418 memset (&ui
->table
[index
], 0, sizeof (struct unwind_table_entry
));
420 /* Convert offset & size into region_start and region_end.
421 Stuff away the stub type into "reserved" fields. */
422 ui
->table
[index
].region_start
= bfd_get_32 (objfile
->obfd
,
424 ui
->table
[index
].region_start
+= text_offset
;
426 ui
->table
[index
].stub_unwind
.stub_type
= bfd_get_8 (objfile
->obfd
,
429 ui
->table
[index
].region_end
430 = ui
->table
[index
].region_start
+ 4 *
431 (bfd_get_16 (objfile
->obfd
, (bfd_byte
*) buf
) - 1);
437 /* Unwind table needs to be kept sorted. */
438 qsort (ui
->table
, total_entries
, sizeof (struct unwind_table_entry
),
439 compare_unwind_entries
);
441 /* Keep a pointer to the unwind information. */
442 obj_private
= (struct hppa_objfile_private
*)
443 objfile_data (objfile
, hppa_objfile_priv_data
);
444 if (obj_private
== NULL
)
445 obj_private
= hppa_init_objfile_priv_data (objfile
);
447 obj_private
->unwind_info
= ui
;
450 /* Lookup the unwind (stack backtrace) info for the given PC. We search all
451 of the objfiles seeking the unwind table entry for this PC. Each objfile
452 contains a sorted list of struct unwind_table_entry. Since we do a binary
453 search of the unwind tables, we depend upon them to be sorted. */
455 struct unwind_table_entry
*
456 find_unwind_entry (CORE_ADDR pc
)
458 int first
, middle
, last
;
459 struct objfile
*objfile
;
460 struct hppa_objfile_private
*priv
;
463 fprintf_unfiltered (gdb_stdlog
, "{ find_unwind_entry %s -> ",
466 /* A function at address 0? Not in HP-UX! */
467 if (pc
== (CORE_ADDR
) 0)
470 fprintf_unfiltered (gdb_stdlog
, "NULL }\n");
474 ALL_OBJFILES (objfile
)
476 struct hppa_unwind_info
*ui
;
478 priv
= objfile_data (objfile
, hppa_objfile_priv_data
);
480 ui
= ((struct hppa_objfile_private
*) priv
)->unwind_info
;
484 read_unwind_info (objfile
);
485 priv
= objfile_data (objfile
, hppa_objfile_priv_data
);
487 error (_("Internal error reading unwind information."));
488 ui
= ((struct hppa_objfile_private
*) priv
)->unwind_info
;
491 /* First, check the cache. */
494 && pc
>= ui
->cache
->region_start
495 && pc
<= ui
->cache
->region_end
)
498 fprintf_unfiltered (gdb_stdlog
, "%s (cached) }\n",
499 hex_string ((uintptr_t) ui
->cache
));
503 /* Not in the cache, do a binary search. */
508 while (first
<= last
)
510 middle
= (first
+ last
) / 2;
511 if (pc
>= ui
->table
[middle
].region_start
512 && pc
<= ui
->table
[middle
].region_end
)
514 ui
->cache
= &ui
->table
[middle
];
516 fprintf_unfiltered (gdb_stdlog
, "%s }\n",
517 hex_string ((uintptr_t) ui
->cache
));
518 return &ui
->table
[middle
];
521 if (pc
< ui
->table
[middle
].region_start
)
526 } /* ALL_OBJFILES() */
529 fprintf_unfiltered (gdb_stdlog
, "NULL (not found) }\n");
534 /* The epilogue is defined here as the area either on the `bv' instruction
535 itself or an instruction which destroys the function's stack frame.
537 We do not assume that the epilogue is at the end of a function as we can
538 also have return sequences in the middle of a function. */
540 hppa_in_function_epilogue_p (struct gdbarch
*gdbarch
, CORE_ADDR pc
)
542 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
543 unsigned long status
;
548 status
= target_read_memory (pc
, buf
, 4);
552 inst
= extract_unsigned_integer (buf
, 4, byte_order
);
554 /* The most common way to perform a stack adjustment ldo X(sp),sp
555 We are destroying a stack frame if the offset is negative. */
556 if ((inst
& 0xffffc000) == 0x37de0000
557 && hppa_extract_14 (inst
) < 0)
560 /* ldw,mb D(sp),X or ldd,mb D(sp),X */
561 if (((inst
& 0x0fc010e0) == 0x0fc010e0
562 || (inst
& 0x0fc010e0) == 0x0fc010e0)
563 && hppa_extract_14 (inst
) < 0)
566 /* bv %r0(%rp) or bv,n %r0(%rp) */
567 if (inst
== 0xe840c000 || inst
== 0xe840c002)
573 static const unsigned char *
574 hppa_breakpoint_from_pc (struct gdbarch
*gdbarch
, CORE_ADDR
*pc
, int *len
)
576 static const unsigned char breakpoint
[] = {0x00, 0x01, 0x00, 0x04};
577 (*len
) = sizeof (breakpoint
);
581 /* Return the name of a register. */
584 hppa32_register_name (struct gdbarch
*gdbarch
, int i
)
586 static char *names
[] = {
587 "flags", "r1", "rp", "r3",
588 "r4", "r5", "r6", "r7",
589 "r8", "r9", "r10", "r11",
590 "r12", "r13", "r14", "r15",
591 "r16", "r17", "r18", "r19",
592 "r20", "r21", "r22", "r23",
593 "r24", "r25", "r26", "dp",
594 "ret0", "ret1", "sp", "r31",
595 "sar", "pcoqh", "pcsqh", "pcoqt",
596 "pcsqt", "eiem", "iir", "isr",
597 "ior", "ipsw", "goto", "sr4",
598 "sr0", "sr1", "sr2", "sr3",
599 "sr5", "sr6", "sr7", "cr0",
600 "cr8", "cr9", "ccr", "cr12",
601 "cr13", "cr24", "cr25", "cr26",
602 "mpsfu_high","mpsfu_low","mpsfu_ovflo","pad",
603 "fpsr", "fpe1", "fpe2", "fpe3",
604 "fpe4", "fpe5", "fpe6", "fpe7",
605 "fr4", "fr4R", "fr5", "fr5R",
606 "fr6", "fr6R", "fr7", "fr7R",
607 "fr8", "fr8R", "fr9", "fr9R",
608 "fr10", "fr10R", "fr11", "fr11R",
609 "fr12", "fr12R", "fr13", "fr13R",
610 "fr14", "fr14R", "fr15", "fr15R",
611 "fr16", "fr16R", "fr17", "fr17R",
612 "fr18", "fr18R", "fr19", "fr19R",
613 "fr20", "fr20R", "fr21", "fr21R",
614 "fr22", "fr22R", "fr23", "fr23R",
615 "fr24", "fr24R", "fr25", "fr25R",
616 "fr26", "fr26R", "fr27", "fr27R",
617 "fr28", "fr28R", "fr29", "fr29R",
618 "fr30", "fr30R", "fr31", "fr31R"
620 if (i
< 0 || i
>= (sizeof (names
) / sizeof (*names
)))
627 hppa64_register_name (struct gdbarch
*gdbarch
, int i
)
629 static char *names
[] = {
630 "flags", "r1", "rp", "r3",
631 "r4", "r5", "r6", "r7",
632 "r8", "r9", "r10", "r11",
633 "r12", "r13", "r14", "r15",
634 "r16", "r17", "r18", "r19",
635 "r20", "r21", "r22", "r23",
636 "r24", "r25", "r26", "dp",
637 "ret0", "ret1", "sp", "r31",
638 "sar", "pcoqh", "pcsqh", "pcoqt",
639 "pcsqt", "eiem", "iir", "isr",
640 "ior", "ipsw", "goto", "sr4",
641 "sr0", "sr1", "sr2", "sr3",
642 "sr5", "sr6", "sr7", "cr0",
643 "cr8", "cr9", "ccr", "cr12",
644 "cr13", "cr24", "cr25", "cr26",
645 "mpsfu_high","mpsfu_low","mpsfu_ovflo","pad",
646 "fpsr", "fpe1", "fpe2", "fpe3",
647 "fr4", "fr5", "fr6", "fr7",
648 "fr8", "fr9", "fr10", "fr11",
649 "fr12", "fr13", "fr14", "fr15",
650 "fr16", "fr17", "fr18", "fr19",
651 "fr20", "fr21", "fr22", "fr23",
652 "fr24", "fr25", "fr26", "fr27",
653 "fr28", "fr29", "fr30", "fr31"
655 if (i
< 0 || i
>= (sizeof (names
) / sizeof (*names
)))
661 /* Map dwarf DBX register numbers to GDB register numbers. */
663 hppa64_dwarf_reg_to_regnum (struct gdbarch
*gdbarch
, int reg
)
665 /* The general registers and the sar are the same in both sets. */
669 /* fr4-fr31 are mapped from 72 in steps of 2. */
670 if (reg
>= 72 && reg
< 72 + 28 * 2 && !(reg
& 1))
671 return HPPA64_FP4_REGNUM
+ (reg
- 72) / 2;
673 warning (_("Unmapped DWARF DBX Register #%d encountered."), reg
);
677 /* This function pushes a stack frame with arguments as part of the
678 inferior function calling mechanism.
680 This is the version of the function for the 32-bit PA machines, in
681 which later arguments appear at lower addresses. (The stack always
682 grows towards higher addresses.)
684 We simply allocate the appropriate amount of stack space and put
685 arguments into their proper slots. */
688 hppa32_push_dummy_call (struct gdbarch
*gdbarch
, struct value
*function
,
689 struct regcache
*regcache
, CORE_ADDR bp_addr
,
690 int nargs
, struct value
**args
, CORE_ADDR sp
,
691 int struct_return
, CORE_ADDR struct_addr
)
693 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
695 /* Stack base address at which any pass-by-reference parameters are
697 CORE_ADDR struct_end
= 0;
698 /* Stack base address at which the first parameter is stored. */
699 CORE_ADDR param_end
= 0;
701 /* The inner most end of the stack after all the parameters have
703 CORE_ADDR new_sp
= 0;
705 /* Two passes. First pass computes the location of everything,
706 second pass writes the bytes out. */
709 /* Global pointer (r19) of the function we are trying to call. */
712 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
714 for (write_pass
= 0; write_pass
< 2; write_pass
++)
716 CORE_ADDR struct_ptr
= 0;
717 /* The first parameter goes into sp-36, each stack slot is 4-bytes.
718 struct_ptr is adjusted for each argument below, so the first
719 argument will end up at sp-36. */
720 CORE_ADDR param_ptr
= 32;
722 int small_struct
= 0;
724 for (i
= 0; i
< nargs
; i
++)
726 struct value
*arg
= args
[i
];
727 struct type
*type
= check_typedef (value_type (arg
));
728 /* The corresponding parameter that is pushed onto the
729 stack, and [possibly] passed in a register. */
732 memset (param_val
, 0, sizeof param_val
);
733 if (TYPE_LENGTH (type
) > 8)
735 /* Large parameter, pass by reference. Store the value
736 in "struct" area and then pass its address. */
738 struct_ptr
+= align_up (TYPE_LENGTH (type
), 8);
740 write_memory (struct_end
- struct_ptr
, value_contents (arg
),
742 store_unsigned_integer (param_val
, 4, byte_order
,
743 struct_end
- struct_ptr
);
745 else if (TYPE_CODE (type
) == TYPE_CODE_INT
746 || TYPE_CODE (type
) == TYPE_CODE_ENUM
)
748 /* Integer value store, right aligned. "unpack_long"
749 takes care of any sign-extension problems. */
750 param_len
= align_up (TYPE_LENGTH (type
), 4);
751 store_unsigned_integer (param_val
, param_len
, byte_order
,
753 value_contents (arg
)));
755 else if (TYPE_CODE (type
) == TYPE_CODE_FLT
)
757 /* Floating point value store, right aligned. */
758 param_len
= align_up (TYPE_LENGTH (type
), 4);
759 memcpy (param_val
, value_contents (arg
), param_len
);
763 param_len
= align_up (TYPE_LENGTH (type
), 4);
765 /* Small struct value are stored right-aligned. */
766 memcpy (param_val
+ param_len
- TYPE_LENGTH (type
),
767 value_contents (arg
), TYPE_LENGTH (type
));
769 /* Structures of size 5, 6 and 7 bytes are special in that
770 the higher-ordered word is stored in the lower-ordered
771 argument, and even though it is a 8-byte quantity the
772 registers need not be 8-byte aligned. */
773 if (param_len
> 4 && param_len
< 8)
777 param_ptr
+= param_len
;
778 if (param_len
== 8 && !small_struct
)
779 param_ptr
= align_up (param_ptr
, 8);
781 /* First 4 non-FP arguments are passed in gr26-gr23.
782 First 4 32-bit FP arguments are passed in fr4L-fr7L.
783 First 2 64-bit FP arguments are passed in fr5 and fr7.
785 The rest go on the stack, starting at sp-36, towards lower
786 addresses. 8-byte arguments must be aligned to a 8-byte
790 write_memory (param_end
- param_ptr
, param_val
, param_len
);
792 /* There are some cases when we don't know the type
793 expected by the callee (e.g. for variadic functions), so
794 pass the parameters in both general and fp regs. */
797 int grreg
= 26 - (param_ptr
- 36) / 4;
798 int fpLreg
= 72 + (param_ptr
- 36) / 4 * 2;
799 int fpreg
= 74 + (param_ptr
- 32) / 8 * 4;
801 regcache_cooked_write (regcache
, grreg
, param_val
);
802 regcache_cooked_write (regcache
, fpLreg
, param_val
);
806 regcache_cooked_write (regcache
, grreg
+ 1,
809 regcache_cooked_write (regcache
, fpreg
, param_val
);
810 regcache_cooked_write (regcache
, fpreg
+ 1,
817 /* Update the various stack pointers. */
820 struct_end
= sp
+ align_up (struct_ptr
, 64);
821 /* PARAM_PTR already accounts for all the arguments passed
822 by the user. However, the ABI mandates minimum stack
823 space allocations for outgoing arguments. The ABI also
824 mandates minimum stack alignments which we must
826 param_end
= struct_end
+ align_up (param_ptr
, 64);
830 /* If a structure has to be returned, set up register 28 to hold its
833 regcache_cooked_write_unsigned (regcache
, 28, struct_addr
);
835 gp
= tdep
->find_global_pointer (gdbarch
, function
);
838 regcache_cooked_write_unsigned (regcache
, 19, gp
);
840 /* Set the return address. */
841 if (!gdbarch_push_dummy_code_p (gdbarch
))
842 regcache_cooked_write_unsigned (regcache
, HPPA_RP_REGNUM
, bp_addr
);
844 /* Update the Stack Pointer. */
845 regcache_cooked_write_unsigned (regcache
, HPPA_SP_REGNUM
, param_end
);
850 /* The 64-bit PA-RISC calling conventions are documented in "64-Bit
851 Runtime Architecture for PA-RISC 2.0", which is distributed as part
852 as of the HP-UX Software Transition Kit (STK). This implementation
853 is based on version 3.3, dated October 6, 1997. */
855 /* Check whether TYPE is an "Integral or Pointer Scalar Type". */
858 hppa64_integral_or_pointer_p (const struct type
*type
)
860 switch (TYPE_CODE (type
))
866 case TYPE_CODE_RANGE
:
868 int len
= TYPE_LENGTH (type
);
869 return (len
== 1 || len
== 2 || len
== 4 || len
== 8);
873 return (TYPE_LENGTH (type
) == 8);
881 /* Check whether TYPE is a "Floating Scalar Type". */
884 hppa64_floating_p (const struct type
*type
)
886 switch (TYPE_CODE (type
))
890 int len
= TYPE_LENGTH (type
);
891 return (len
== 4 || len
== 8 || len
== 16);
900 /* If CODE points to a function entry address, try to look up the corresponding
901 function descriptor and return its address instead. If CODE is not a
902 function entry address, then just return it unchanged. */
904 hppa64_convert_code_addr_to_fptr (struct gdbarch
*gdbarch
, CORE_ADDR code
)
906 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
907 struct obj_section
*sec
, *opd
;
909 sec
= find_pc_section (code
);
914 /* If CODE is in a data section, assume it's already a fptr. */
915 if (!(sec
->the_bfd_section
->flags
& SEC_CODE
))
918 ALL_OBJFILE_OSECTIONS (sec
->objfile
, opd
)
920 if (strcmp (opd
->the_bfd_section
->name
, ".opd") == 0)
924 if (opd
< sec
->objfile
->sections_end
)
928 for (addr
= obj_section_addr (opd
);
929 addr
< obj_section_endaddr (opd
);
935 if (target_read_memory (addr
, tmp
, sizeof (tmp
)))
937 opdaddr
= extract_unsigned_integer (tmp
, sizeof (tmp
), byte_order
);
948 hppa64_push_dummy_call (struct gdbarch
*gdbarch
, struct value
*function
,
949 struct regcache
*regcache
, CORE_ADDR bp_addr
,
950 int nargs
, struct value
**args
, CORE_ADDR sp
,
951 int struct_return
, CORE_ADDR struct_addr
)
953 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
954 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
958 /* "The outgoing parameter area [...] must be aligned at a 16-byte
960 sp
= align_up (sp
, 16);
962 for (i
= 0; i
< nargs
; i
++)
964 struct value
*arg
= args
[i
];
965 struct type
*type
= value_type (arg
);
966 int len
= TYPE_LENGTH (type
);
967 const bfd_byte
*valbuf
;
971 /* "Each parameter begins on a 64-bit (8-byte) boundary." */
972 offset
= align_up (offset
, 8);
974 if (hppa64_integral_or_pointer_p (type
))
976 /* "Integral scalar parameters smaller than 64 bits are
977 padded on the left (i.e., the value is in the
978 least-significant bits of the 64-bit storage unit, and
979 the high-order bits are undefined)." Therefore we can
980 safely sign-extend them. */
983 arg
= value_cast (builtin_type (gdbarch
)->builtin_int64
, arg
);
987 else if (hppa64_floating_p (type
))
991 /* "Quad-precision (128-bit) floating-point scalar
992 parameters are aligned on a 16-byte boundary." */
993 offset
= align_up (offset
, 16);
995 /* "Double-extended- and quad-precision floating-point
996 parameters within the first 64 bytes of the parameter
997 list are always passed in general registers." */
1003 /* "Single-precision (32-bit) floating-point scalar
1004 parameters are padded on the left with 32 bits of
1005 garbage (i.e., the floating-point value is in the
1006 least-significant 32 bits of a 64-bit storage
1011 /* "Single- and double-precision floating-point
1012 parameters in this area are passed according to the
1013 available formal parameter information in a function
1014 prototype. [...] If no prototype is in scope,
1015 floating-point parameters must be passed both in the
1016 corresponding general registers and in the
1017 corresponding floating-point registers." */
1018 regnum
= HPPA64_FP4_REGNUM
+ offset
/ 8;
1020 if (regnum
< HPPA64_FP4_REGNUM
+ 8)
1022 /* "Single-precision floating-point parameters, when
1023 passed in floating-point registers, are passed in
1024 the right halves of the floating point registers;
1025 the left halves are unused." */
1026 regcache_cooked_write_part (regcache
, regnum
, offset
% 8,
1027 len
, value_contents (arg
));
1035 /* "Aggregates larger than 8 bytes are aligned on a
1036 16-byte boundary, possibly leaving an unused argument
1037 slot, which is filled with garbage. If necessary,
1038 they are padded on the right (with garbage), to a
1039 multiple of 8 bytes." */
1040 offset
= align_up (offset
, 16);
1044 /* If we are passing a function pointer, make sure we pass a function
1045 descriptor instead of the function entry address. */
1046 if (TYPE_CODE (type
) == TYPE_CODE_PTR
1047 && TYPE_CODE (TYPE_TARGET_TYPE (type
)) == TYPE_CODE_FUNC
)
1049 ULONGEST codeptr
, fptr
;
1051 codeptr
= unpack_long (type
, value_contents (arg
));
1052 fptr
= hppa64_convert_code_addr_to_fptr (gdbarch
, codeptr
);
1053 store_unsigned_integer (fptrbuf
, TYPE_LENGTH (type
), byte_order
,
1059 valbuf
= value_contents (arg
);
1062 /* Always store the argument in memory. */
1063 write_memory (sp
+ offset
, valbuf
, len
);
1065 regnum
= HPPA_ARG0_REGNUM
- offset
/ 8;
1066 while (regnum
> HPPA_ARG0_REGNUM
- 8 && len
> 0)
1068 regcache_cooked_write_part (regcache
, regnum
,
1069 offset
% 8, min (len
, 8), valbuf
);
1070 offset
+= min (len
, 8);
1071 valbuf
+= min (len
, 8);
1072 len
-= min (len
, 8);
1079 /* Set up GR29 (%ret1) to hold the argument pointer (ap). */
1080 regcache_cooked_write_unsigned (regcache
, HPPA_RET1_REGNUM
, sp
+ 64);
1082 /* Allocate the outgoing parameter area. Make sure the outgoing
1083 parameter area is multiple of 16 bytes in length. */
1084 sp
+= max (align_up (offset
, 16), 64);
1086 /* Allocate 32-bytes of scratch space. The documentation doesn't
1087 mention this, but it seems to be needed. */
1090 /* Allocate the frame marker area. */
1093 /* If a structure has to be returned, set up GR 28 (%ret0) to hold
1096 regcache_cooked_write_unsigned (regcache
, HPPA_RET0_REGNUM
, struct_addr
);
1098 /* Set up GR27 (%dp) to hold the global pointer (gp). */
1099 gp
= tdep
->find_global_pointer (gdbarch
, function
);
1101 regcache_cooked_write_unsigned (regcache
, HPPA_DP_REGNUM
, gp
);
1103 /* Set up GR2 (%rp) to hold the return pointer (rp). */
1104 if (!gdbarch_push_dummy_code_p (gdbarch
))
1105 regcache_cooked_write_unsigned (regcache
, HPPA_RP_REGNUM
, bp_addr
);
1107 /* Set up GR30 to hold the stack pointer (sp). */
1108 regcache_cooked_write_unsigned (regcache
, HPPA_SP_REGNUM
, sp
);
1114 /* Handle 32/64-bit struct return conventions. */
1116 static enum return_value_convention
1117 hppa32_return_value (struct gdbarch
*gdbarch
, struct type
*func_type
,
1118 struct type
*type
, struct regcache
*regcache
,
1119 gdb_byte
*readbuf
, const gdb_byte
*writebuf
)
1121 if (TYPE_LENGTH (type
) <= 2 * 4)
1123 /* The value always lives in the right hand end of the register
1124 (or register pair)? */
1126 int reg
= TYPE_CODE (type
) == TYPE_CODE_FLT
? HPPA_FP4_REGNUM
: 28;
1127 int part
= TYPE_LENGTH (type
) % 4;
1128 /* The left hand register contains only part of the value,
1129 transfer that first so that the rest can be xfered as entire
1130 4-byte registers. */
1133 if (readbuf
!= NULL
)
1134 regcache_cooked_read_part (regcache
, reg
, 4 - part
,
1136 if (writebuf
!= NULL
)
1137 regcache_cooked_write_part (regcache
, reg
, 4 - part
,
1141 /* Now transfer the remaining register values. */
1142 for (b
= part
; b
< TYPE_LENGTH (type
); b
+= 4)
1144 if (readbuf
!= NULL
)
1145 regcache_cooked_read (regcache
, reg
, readbuf
+ b
);
1146 if (writebuf
!= NULL
)
1147 regcache_cooked_write (regcache
, reg
, writebuf
+ b
);
1150 return RETURN_VALUE_REGISTER_CONVENTION
;
1153 return RETURN_VALUE_STRUCT_CONVENTION
;
1156 static enum return_value_convention
1157 hppa64_return_value (struct gdbarch
*gdbarch
, struct type
*func_type
,
1158 struct type
*type
, struct regcache
*regcache
,
1159 gdb_byte
*readbuf
, const gdb_byte
*writebuf
)
1161 int len
= TYPE_LENGTH (type
);
1166 /* All return values larget than 128 bits must be aggregate
1168 gdb_assert (!hppa64_integral_or_pointer_p (type
));
1169 gdb_assert (!hppa64_floating_p (type
));
1171 /* "Aggregate return values larger than 128 bits are returned in
1172 a buffer allocated by the caller. The address of the buffer
1173 must be passed in GR 28." */
1174 return RETURN_VALUE_STRUCT_CONVENTION
;
1177 if (hppa64_integral_or_pointer_p (type
))
1179 /* "Integral return values are returned in GR 28. Values
1180 smaller than 64 bits are padded on the left (with garbage)." */
1181 regnum
= HPPA_RET0_REGNUM
;
1184 else if (hppa64_floating_p (type
))
1188 /* "Double-extended- and quad-precision floating-point
1189 values are returned in GRs 28 and 29. The sign,
1190 exponent, and most-significant bits of the mantissa are
1191 returned in GR 28; the least-significant bits of the
1192 mantissa are passed in GR 29. For double-extended
1193 precision values, GR 29 is padded on the right with 48
1194 bits of garbage." */
1195 regnum
= HPPA_RET0_REGNUM
;
1200 /* "Single-precision and double-precision floating-point
1201 return values are returned in FR 4R (single precision) or
1202 FR 4 (double-precision)." */
1203 regnum
= HPPA64_FP4_REGNUM
;
1209 /* "Aggregate return values up to 64 bits in size are returned
1210 in GR 28. Aggregates smaller than 64 bits are left aligned
1211 in the register; the pad bits on the right are undefined."
1213 "Aggregate return values between 65 and 128 bits are returned
1214 in GRs 28 and 29. The first 64 bits are placed in GR 28, and
1215 the remaining bits are placed, left aligned, in GR 29. The
1216 pad bits on the right of GR 29 (if any) are undefined." */
1217 regnum
= HPPA_RET0_REGNUM
;
1225 regcache_cooked_read_part (regcache
, regnum
, offset
,
1226 min (len
, 8), readbuf
);
1227 readbuf
+= min (len
, 8);
1228 len
-= min (len
, 8);
1237 regcache_cooked_write_part (regcache
, regnum
, offset
,
1238 min (len
, 8), writebuf
);
1239 writebuf
+= min (len
, 8);
1240 len
-= min (len
, 8);
1245 return RETURN_VALUE_REGISTER_CONVENTION
;
1250 hppa32_convert_from_func_ptr_addr (struct gdbarch
*gdbarch
, CORE_ADDR addr
,
1251 struct target_ops
*targ
)
1255 struct type
*func_ptr_type
= builtin_type (gdbarch
)->builtin_func_ptr
;
1256 CORE_ADDR plabel
= addr
& ~3;
1257 return read_memory_typed_address (plabel
, func_ptr_type
);
1264 hppa32_frame_align (struct gdbarch
*gdbarch
, CORE_ADDR addr
)
1266 /* HP frames are 64-byte (or cache line) aligned (yes that's _byte_
1268 return align_up (addr
, 64);
1271 /* Force all frames to 16-byte alignment. Better safe than sorry. */
1274 hppa64_frame_align (struct gdbarch
*gdbarch
, CORE_ADDR addr
)
1276 /* Just always 16-byte align. */
1277 return align_up (addr
, 16);
1281 hppa_read_pc (struct regcache
*regcache
)
1286 regcache_cooked_read_unsigned (regcache
, HPPA_IPSW_REGNUM
, &ipsw
);
1287 regcache_cooked_read_unsigned (regcache
, HPPA_PCOQ_HEAD_REGNUM
, &pc
);
1289 /* If the current instruction is nullified, then we are effectively
1290 still executing the previous instruction. Pretend we are still
1291 there. This is needed when single stepping; if the nullified
1292 instruction is on a different line, we don't want GDB to think
1293 we've stepped onto that line. */
1294 if (ipsw
& 0x00200000)
1301 hppa_write_pc (struct regcache
*regcache
, CORE_ADDR pc
)
1303 regcache_cooked_write_unsigned (regcache
, HPPA_PCOQ_HEAD_REGNUM
, pc
);
1304 regcache_cooked_write_unsigned (regcache
, HPPA_PCOQ_TAIL_REGNUM
, pc
+ 4);
1307 /* For the given instruction (INST), return any adjustment it makes
1308 to the stack pointer or zero for no adjustment.
1310 This only handles instructions commonly found in prologues. */
1313 prologue_inst_adjust_sp (unsigned long inst
)
1315 /* This must persist across calls. */
1316 static int save_high21
;
1318 /* The most common way to perform a stack adjustment ldo X(sp),sp */
1319 if ((inst
& 0xffffc000) == 0x37de0000)
1320 return hppa_extract_14 (inst
);
1323 if ((inst
& 0xffe00000) == 0x6fc00000)
1324 return hppa_extract_14 (inst
);
1326 /* std,ma X,D(sp) */
1327 if ((inst
& 0xffe00008) == 0x73c00008)
1328 return (inst
& 0x1 ? -1 << 13 : 0) | (((inst
>> 4) & 0x3ff) << 3);
1330 /* addil high21,%r30; ldo low11,(%r1),%r30)
1331 save high bits in save_high21 for later use. */
1332 if ((inst
& 0xffe00000) == 0x2bc00000)
1334 save_high21
= hppa_extract_21 (inst
);
1338 if ((inst
& 0xffff0000) == 0x343e0000)
1339 return save_high21
+ hppa_extract_14 (inst
);
1341 /* fstws as used by the HP compilers. */
1342 if ((inst
& 0xffffffe0) == 0x2fd01220)
1343 return hppa_extract_5_load (inst
);
1345 /* No adjustment. */
1349 /* Return nonzero if INST is a branch of some kind, else return zero. */
1352 is_branch (unsigned long inst
)
1381 /* Return the register number for a GR which is saved by INST or
1382 zero it INST does not save a GR. */
1385 inst_saves_gr (unsigned long inst
)
1387 /* Does it look like a stw? */
1388 if ((inst
>> 26) == 0x1a || (inst
>> 26) == 0x1b
1389 || (inst
>> 26) == 0x1f
1390 || ((inst
>> 26) == 0x1f
1391 && ((inst
>> 6) == 0xa)))
1392 return hppa_extract_5R_store (inst
);
1394 /* Does it look like a std? */
1395 if ((inst
>> 26) == 0x1c
1396 || ((inst
>> 26) == 0x03
1397 && ((inst
>> 6) & 0xf) == 0xb))
1398 return hppa_extract_5R_store (inst
);
1400 /* Does it look like a stwm? GCC & HPC may use this in prologues. */
1401 if ((inst
>> 26) == 0x1b)
1402 return hppa_extract_5R_store (inst
);
1404 /* Does it look like sth or stb? HPC versions 9.0 and later use these
1406 if ((inst
>> 26) == 0x19 || (inst
>> 26) == 0x18
1407 || ((inst
>> 26) == 0x3
1408 && (((inst
>> 6) & 0xf) == 0x8
1409 || (inst
>> 6) & 0xf) == 0x9))
1410 return hppa_extract_5R_store (inst
);
1415 /* Return the register number for a FR which is saved by INST or
1416 zero it INST does not save a FR.
1418 Note we only care about full 64bit register stores (that's the only
1419 kind of stores the prologue will use).
1421 FIXME: What about argument stores with the HP compiler in ANSI mode? */
1424 inst_saves_fr (unsigned long inst
)
1426 /* Is this an FSTD? */
1427 if ((inst
& 0xfc00dfc0) == 0x2c001200)
1428 return hppa_extract_5r_store (inst
);
1429 if ((inst
& 0xfc000002) == 0x70000002)
1430 return hppa_extract_5R_store (inst
);
1431 /* Is this an FSTW? */
1432 if ((inst
& 0xfc00df80) == 0x24001200)
1433 return hppa_extract_5r_store (inst
);
1434 if ((inst
& 0xfc000002) == 0x7c000000)
1435 return hppa_extract_5R_store (inst
);
1439 /* Advance PC across any function entry prologue instructions
1440 to reach some "real" code.
1442 Use information in the unwind table to determine what exactly should
1443 be in the prologue. */
1447 skip_prologue_hard_way (struct gdbarch
*gdbarch
, CORE_ADDR pc
,
1448 int stop_before_branch
)
1450 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
1452 CORE_ADDR orig_pc
= pc
;
1453 unsigned long inst
, stack_remaining
, save_gr
, save_fr
, save_rp
, save_sp
;
1454 unsigned long args_stored
, status
, i
, restart_gr
, restart_fr
;
1455 struct unwind_table_entry
*u
;
1456 int final_iteration
;
1462 u
= find_unwind_entry (pc
);
1466 /* If we are not at the beginning of a function, then return now. */
1467 if ((pc
& ~0x3) != u
->region_start
)
1470 /* This is how much of a frame adjustment we need to account for. */
1471 stack_remaining
= u
->Total_frame_size
<< 3;
1473 /* Magic register saves we want to know about. */
1474 save_rp
= u
->Save_RP
;
1475 save_sp
= u
->Save_SP
;
1477 /* An indication that args may be stored into the stack. Unfortunately
1478 the HPUX compilers tend to set this in cases where no args were
1482 /* Turn the Entry_GR field into a bitmask. */
1484 for (i
= 3; i
< u
->Entry_GR
+ 3; i
++)
1486 /* Frame pointer gets saved into a special location. */
1487 if (u
->Save_SP
&& i
== HPPA_FP_REGNUM
)
1490 save_gr
|= (1 << i
);
1492 save_gr
&= ~restart_gr
;
1494 /* Turn the Entry_FR field into a bitmask too. */
1496 for (i
= 12; i
< u
->Entry_FR
+ 12; i
++)
1497 save_fr
|= (1 << i
);
1498 save_fr
&= ~restart_fr
;
1500 final_iteration
= 0;
1502 /* Loop until we find everything of interest or hit a branch.
1504 For unoptimized GCC code and for any HP CC code this will never ever
1505 examine any user instructions.
1507 For optimzied GCC code we're faced with problems. GCC will schedule
1508 its prologue and make prologue instructions available for delay slot
1509 filling. The end result is user code gets mixed in with the prologue
1510 and a prologue instruction may be in the delay slot of the first branch
1513 Some unexpected things are expected with debugging optimized code, so
1514 we allow this routine to walk past user instructions in optimized
1516 while (save_gr
|| save_fr
|| save_rp
|| save_sp
|| stack_remaining
> 0
1519 unsigned int reg_num
;
1520 unsigned long old_stack_remaining
, old_save_gr
, old_save_fr
;
1521 unsigned long old_save_rp
, old_save_sp
, next_inst
;
1523 /* Save copies of all the triggers so we can compare them later
1525 old_save_gr
= save_gr
;
1526 old_save_fr
= save_fr
;
1527 old_save_rp
= save_rp
;
1528 old_save_sp
= save_sp
;
1529 old_stack_remaining
= stack_remaining
;
1531 status
= target_read_memory (pc
, buf
, 4);
1532 inst
= extract_unsigned_integer (buf
, 4, byte_order
);
1538 /* Note the interesting effects of this instruction. */
1539 stack_remaining
-= prologue_inst_adjust_sp (inst
);
1541 /* There are limited ways to store the return pointer into the
1543 if (inst
== 0x6bc23fd9 || inst
== 0x0fc212c1 || inst
== 0x73c23fe1)
1546 /* These are the only ways we save SP into the stack. At this time
1547 the HP compilers never bother to save SP into the stack. */
1548 if ((inst
& 0xffffc000) == 0x6fc10000
1549 || (inst
& 0xffffc00c) == 0x73c10008)
1552 /* Are we loading some register with an offset from the argument
1554 if ((inst
& 0xffe00000) == 0x37a00000
1555 || (inst
& 0xffffffe0) == 0x081d0240)
1561 /* Account for general and floating-point register saves. */
1562 reg_num
= inst_saves_gr (inst
);
1563 save_gr
&= ~(1 << reg_num
);
1565 /* Ugh. Also account for argument stores into the stack.
1566 Unfortunately args_stored only tells us that some arguments
1567 where stored into the stack. Not how many or what kind!
1569 This is a kludge as on the HP compiler sets this bit and it
1570 never does prologue scheduling. So once we see one, skip past
1571 all of them. We have similar code for the fp arg stores below.
1573 FIXME. Can still die if we have a mix of GR and FR argument
1575 if (reg_num
>= (gdbarch_ptr_bit (gdbarch
) == 64 ? 19 : 23)
1578 while (reg_num
>= (gdbarch_ptr_bit (gdbarch
) == 64 ? 19 : 23)
1582 status
= target_read_memory (pc
, buf
, 4);
1583 inst
= extract_unsigned_integer (buf
, 4, byte_order
);
1586 reg_num
= inst_saves_gr (inst
);
1592 reg_num
= inst_saves_fr (inst
);
1593 save_fr
&= ~(1 << reg_num
);
1595 status
= target_read_memory (pc
+ 4, buf
, 4);
1596 next_inst
= extract_unsigned_integer (buf
, 4, byte_order
);
1602 /* We've got to be read to handle the ldo before the fp register
1604 if ((inst
& 0xfc000000) == 0x34000000
1605 && inst_saves_fr (next_inst
) >= 4
1606 && inst_saves_fr (next_inst
)
1607 <= (gdbarch_ptr_bit (gdbarch
) == 64 ? 11 : 7))
1609 /* So we drop into the code below in a reasonable state. */
1610 reg_num
= inst_saves_fr (next_inst
);
1614 /* Ugh. Also account for argument stores into the stack.
1615 This is a kludge as on the HP compiler sets this bit and it
1616 never does prologue scheduling. So once we see one, skip past
1619 && reg_num
<= (gdbarch_ptr_bit (gdbarch
) == 64 ? 11 : 7))
1623 <= (gdbarch_ptr_bit (gdbarch
) == 64 ? 11 : 7))
1626 status
= target_read_memory (pc
, buf
, 4);
1627 inst
= extract_unsigned_integer (buf
, 4, byte_order
);
1630 if ((inst
& 0xfc000000) != 0x34000000)
1632 status
= target_read_memory (pc
+ 4, buf
, 4);
1633 next_inst
= extract_unsigned_integer (buf
, 4, byte_order
);
1636 reg_num
= inst_saves_fr (next_inst
);
1642 /* Quit if we hit any kind of branch. This can happen if a prologue
1643 instruction is in the delay slot of the first call/branch. */
1644 if (is_branch (inst
) && stop_before_branch
)
1647 /* What a crock. The HP compilers set args_stored even if no
1648 arguments were stored into the stack (boo hiss). This could
1649 cause this code to then skip a bunch of user insns (up to the
1652 To combat this we try to identify when args_stored was bogusly
1653 set and clear it. We only do this when args_stored is nonzero,
1654 all other resources are accounted for, and nothing changed on
1657 && !(save_gr
|| save_fr
|| save_rp
|| save_sp
|| stack_remaining
> 0)
1658 && old_save_gr
== save_gr
&& old_save_fr
== save_fr
1659 && old_save_rp
== save_rp
&& old_save_sp
== save_sp
1660 && old_stack_remaining
== stack_remaining
)
1666 /* !stop_before_branch, so also look at the insn in the delay slot
1668 if (final_iteration
)
1670 if (is_branch (inst
))
1671 final_iteration
= 1;
1674 /* We've got a tenative location for the end of the prologue. However
1675 because of limitations in the unwind descriptor mechanism we may
1676 have went too far into user code looking for the save of a register
1677 that does not exist. So, if there registers we expected to be saved
1678 but never were, mask them out and restart.
1680 This should only happen in optimized code, and should be very rare. */
1681 if (save_gr
|| (save_fr
&& !(restart_fr
|| restart_gr
)))
1684 restart_gr
= save_gr
;
1685 restart_fr
= save_fr
;
1693 /* Return the address of the PC after the last prologue instruction if
1694 we can determine it from the debug symbols. Else return zero. */
1697 after_prologue (CORE_ADDR pc
)
1699 struct symtab_and_line sal
;
1700 CORE_ADDR func_addr
, func_end
;
1703 /* If we can not find the symbol in the partial symbol table, then
1704 there is no hope we can determine the function's start address
1706 if (!find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
1709 /* Get the line associated with FUNC_ADDR. */
1710 sal
= find_pc_line (func_addr
, 0);
1712 /* There are only two cases to consider. First, the end of the source line
1713 is within the function bounds. In that case we return the end of the
1714 source line. Second is the end of the source line extends beyond the
1715 bounds of the current function. We need to use the slow code to
1716 examine instructions in that case.
1718 Anything else is simply a bug elsewhere. Fixing it here is absolutely
1719 the wrong thing to do. In fact, it should be entirely possible for this
1720 function to always return zero since the slow instruction scanning code
1721 is supposed to *always* work. If it does not, then it is a bug. */
1722 if (sal
.end
< func_end
)
1728 /* To skip prologues, I use this predicate. Returns either PC itself
1729 if the code at PC does not look like a function prologue; otherwise
1730 returns an address that (if we're lucky) follows the prologue.
1732 hppa_skip_prologue is called by gdb to place a breakpoint in a function.
1733 It doesn't necessarily skips all the insns in the prologue. In fact
1734 we might not want to skip all the insns because a prologue insn may
1735 appear in the delay slot of the first branch, and we don't want to
1736 skip over the branch in that case. */
1739 hppa_skip_prologue (struct gdbarch
*gdbarch
, CORE_ADDR pc
)
1743 CORE_ADDR post_prologue_pc
;
1746 /* See if we can determine the end of the prologue via the symbol table.
1747 If so, then return either PC, or the PC after the prologue, whichever
1750 post_prologue_pc
= after_prologue (pc
);
1752 /* If after_prologue returned a useful address, then use it. Else
1753 fall back on the instruction skipping code.
1755 Some folks have claimed this causes problems because the breakpoint
1756 may be the first instruction of the prologue. If that happens, then
1757 the instruction skipping code has a bug that needs to be fixed. */
1758 if (post_prologue_pc
!= 0)
1759 return max (pc
, post_prologue_pc
);
1761 return (skip_prologue_hard_way (gdbarch
, pc
, 1));
1764 /* Return an unwind entry that falls within the frame's code block. */
1766 static struct unwind_table_entry
*
1767 hppa_find_unwind_entry_in_block (struct frame_info
*this_frame
)
1769 CORE_ADDR pc
= get_frame_address_in_block (this_frame
);
1771 /* FIXME drow/20070101: Calling gdbarch_addr_bits_remove on the
1772 result of get_frame_address_in_block implies a problem.
1773 The bits should have been removed earlier, before the return
1774 value of gdbarch_unwind_pc. That might be happening already;
1775 if it isn't, it should be fixed. Then this call can be
1777 pc
= gdbarch_addr_bits_remove (get_frame_arch (this_frame
), pc
);
1778 return find_unwind_entry (pc
);
1781 struct hppa_frame_cache
1784 struct trad_frame_saved_reg
*saved_regs
;
1787 static struct hppa_frame_cache
*
1788 hppa_frame_cache (struct frame_info
*this_frame
, void **this_cache
)
1790 struct gdbarch
*gdbarch
= get_frame_arch (this_frame
);
1791 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
1792 int word_size
= gdbarch_ptr_bit (gdbarch
) / 8;
1793 struct hppa_frame_cache
*cache
;
1798 struct unwind_table_entry
*u
;
1799 CORE_ADDR prologue_end
;
1804 fprintf_unfiltered (gdb_stdlog
, "{ hppa_frame_cache (frame=%d) -> ",
1805 frame_relative_level(this_frame
));
1807 if ((*this_cache
) != NULL
)
1810 fprintf_unfiltered (gdb_stdlog
, "base=%s (cached) }",
1811 paddress (gdbarch
, ((struct hppa_frame_cache
*)*this_cache
)->base
));
1812 return (*this_cache
);
1814 cache
= FRAME_OBSTACK_ZALLOC (struct hppa_frame_cache
);
1815 (*this_cache
) = cache
;
1816 cache
->saved_regs
= trad_frame_alloc_saved_regs (this_frame
);
1819 u
= hppa_find_unwind_entry_in_block (this_frame
);
1823 fprintf_unfiltered (gdb_stdlog
, "base=NULL (no unwind entry) }");
1824 return (*this_cache
);
1827 /* Turn the Entry_GR field into a bitmask. */
1829 for (i
= 3; i
< u
->Entry_GR
+ 3; i
++)
1831 /* Frame pointer gets saved into a special location. */
1832 if (u
->Save_SP
&& i
== HPPA_FP_REGNUM
)
1835 saved_gr_mask
|= (1 << i
);
1838 /* Turn the Entry_FR field into a bitmask too. */
1840 for (i
= 12; i
< u
->Entry_FR
+ 12; i
++)
1841 saved_fr_mask
|= (1 << i
);
1843 /* Loop until we find everything of interest or hit a branch.
1845 For unoptimized GCC code and for any HP CC code this will never ever
1846 examine any user instructions.
1848 For optimized GCC code we're faced with problems. GCC will schedule
1849 its prologue and make prologue instructions available for delay slot
1850 filling. The end result is user code gets mixed in with the prologue
1851 and a prologue instruction may be in the delay slot of the first branch
1854 Some unexpected things are expected with debugging optimized code, so
1855 we allow this routine to walk past user instructions in optimized
1858 int final_iteration
= 0;
1859 CORE_ADDR pc
, start_pc
, end_pc
;
1860 int looking_for_sp
= u
->Save_SP
;
1861 int looking_for_rp
= u
->Save_RP
;
1864 /* We have to use skip_prologue_hard_way instead of just
1865 skip_prologue_using_sal, in case we stepped into a function without
1866 symbol information. hppa_skip_prologue also bounds the returned
1867 pc by the passed in pc, so it will not return a pc in the next
1870 We used to call hppa_skip_prologue to find the end of the prologue,
1871 but if some non-prologue instructions get scheduled into the prologue,
1872 and the program is compiled with debug information, the "easy" way
1873 in hppa_skip_prologue will return a prologue end that is too early
1874 for us to notice any potential frame adjustments. */
1876 /* We used to use get_frame_func to locate the beginning of the
1877 function to pass to skip_prologue. However, when objects are
1878 compiled without debug symbols, get_frame_func can return the wrong
1879 function (or 0). We can do better than that by using unwind records.
1880 This only works if the Region_description of the unwind record
1881 indicates that it includes the entry point of the function.
1882 HP compilers sometimes generate unwind records for regions that
1883 do not include the entry or exit point of a function. GNU tools
1886 if ((u
->Region_description
& 0x2) == 0)
1887 start_pc
= u
->region_start
;
1889 start_pc
= get_frame_func (this_frame
);
1891 prologue_end
= skip_prologue_hard_way (gdbarch
, start_pc
, 0);
1892 end_pc
= get_frame_pc (this_frame
);
1894 if (prologue_end
!= 0 && end_pc
> prologue_end
)
1895 end_pc
= prologue_end
;
1900 ((saved_gr_mask
|| saved_fr_mask
1901 || looking_for_sp
|| looking_for_rp
1902 || frame_size
< (u
->Total_frame_size
<< 3))
1910 if (!safe_frame_unwind_memory (this_frame
, pc
, buf4
, sizeof buf4
))
1912 error (_("Cannot read instruction at %s."),
1913 paddress (gdbarch
, pc
));
1914 return (*this_cache
);
1917 inst
= extract_unsigned_integer (buf4
, sizeof buf4
, byte_order
);
1919 /* Note the interesting effects of this instruction. */
1920 frame_size
+= prologue_inst_adjust_sp (inst
);
1922 /* There are limited ways to store the return pointer into the
1924 if (inst
== 0x6bc23fd9) /* stw rp,-0x14(sr0,sp) */
1927 cache
->saved_regs
[HPPA_RP_REGNUM
].addr
= -20;
1929 else if (inst
== 0x6bc23fd1) /* stw rp,-0x18(sr0,sp) */
1932 cache
->saved_regs
[HPPA_RP_REGNUM
].addr
= -24;
1934 else if (inst
== 0x0fc212c1
1935 || inst
== 0x73c23fe1) /* std rp,-0x10(sr0,sp) */
1938 cache
->saved_regs
[HPPA_RP_REGNUM
].addr
= -16;
1941 /* Check to see if we saved SP into the stack. This also
1942 happens to indicate the location of the saved frame
1944 if ((inst
& 0xffffc000) == 0x6fc10000 /* stw,ma r1,N(sr0,sp) */
1945 || (inst
& 0xffffc00c) == 0x73c10008) /* std,ma r1,N(sr0,sp) */
1948 cache
->saved_regs
[HPPA_FP_REGNUM
].addr
= 0;
1950 else if (inst
== 0x08030241) /* copy %r3, %r1 */
1955 /* Account for general and floating-point register saves. */
1956 reg
= inst_saves_gr (inst
);
1957 if (reg
>= 3 && reg
<= 18
1958 && (!u
->Save_SP
|| reg
!= HPPA_FP_REGNUM
))
1960 saved_gr_mask
&= ~(1 << reg
);
1961 if ((inst
>> 26) == 0x1b && hppa_extract_14 (inst
) >= 0)
1962 /* stwm with a positive displacement is a _post_
1964 cache
->saved_regs
[reg
].addr
= 0;
1965 else if ((inst
& 0xfc00000c) == 0x70000008)
1966 /* A std has explicit post_modify forms. */
1967 cache
->saved_regs
[reg
].addr
= 0;
1972 if ((inst
>> 26) == 0x1c)
1973 offset
= (inst
& 0x1 ? -1 << 13 : 0)
1974 | (((inst
>> 4) & 0x3ff) << 3);
1975 else if ((inst
>> 26) == 0x03)
1976 offset
= hppa_low_hppa_sign_extend (inst
& 0x1f, 5);
1978 offset
= hppa_extract_14 (inst
);
1980 /* Handle code with and without frame pointers. */
1982 cache
->saved_regs
[reg
].addr
= offset
;
1984 cache
->saved_regs
[reg
].addr
1985 = (u
->Total_frame_size
<< 3) + offset
;
1989 /* GCC handles callee saved FP regs a little differently.
1991 It emits an instruction to put the value of the start of
1992 the FP store area into %r1. It then uses fstds,ma with a
1993 basereg of %r1 for the stores.
1995 HP CC emits them at the current stack pointer modifying the
1996 stack pointer as it stores each register. */
1998 /* ldo X(%r3),%r1 or ldo X(%r30),%r1. */
1999 if ((inst
& 0xffffc000) == 0x34610000
2000 || (inst
& 0xffffc000) == 0x37c10000)
2001 fp_loc
= hppa_extract_14 (inst
);
2003 reg
= inst_saves_fr (inst
);
2004 if (reg
>= 12 && reg
<= 21)
2006 /* Note +4 braindamage below is necessary because the FP
2007 status registers are internally 8 registers rather than
2008 the expected 4 registers. */
2009 saved_fr_mask
&= ~(1 << reg
);
2012 /* 1st HP CC FP register store. After this
2013 instruction we've set enough state that the GCC and
2014 HPCC code are both handled in the same manner. */
2015 cache
->saved_regs
[reg
+ HPPA_FP4_REGNUM
+ 4].addr
= 0;
2020 cache
->saved_regs
[reg
+ HPPA_FP0_REGNUM
+ 4].addr
= fp_loc
;
2025 /* Quit if we hit any kind of branch the previous iteration. */
2026 if (final_iteration
)
2028 /* We want to look precisely one instruction beyond the branch
2029 if we have not found everything yet. */
2030 if (is_branch (inst
))
2031 final_iteration
= 1;
2036 /* The frame base always represents the value of %sp at entry to
2037 the current function (and is thus equivalent to the "saved"
2039 CORE_ADDR this_sp
= get_frame_register_unsigned (this_frame
,
2044 fprintf_unfiltered (gdb_stdlog
, " (this_sp=%s, pc=%s, "
2045 "prologue_end=%s) ",
2046 paddress (gdbarch
, this_sp
),
2047 paddress (gdbarch
, get_frame_pc (this_frame
)),
2048 paddress (gdbarch
, prologue_end
));
2050 /* Check to see if a frame pointer is available, and use it for
2051 frame unwinding if it is.
2053 There are some situations where we need to rely on the frame
2054 pointer to do stack unwinding. For example, if a function calls
2055 alloca (), the stack pointer can get adjusted inside the body of
2056 the function. In this case, the ABI requires that the compiler
2057 maintain a frame pointer for the function.
2059 The unwind record has a flag (alloca_frame) that indicates that
2060 a function has a variable frame; unfortunately, gcc/binutils
2061 does not set this flag. Instead, whenever a frame pointer is used
2062 and saved on the stack, the Save_SP flag is set. We use this to
2063 decide whether to use the frame pointer for unwinding.
2065 TODO: For the HP compiler, maybe we should use the alloca_frame flag
2066 instead of Save_SP. */
2068 fp
= get_frame_register_unsigned (this_frame
, HPPA_FP_REGNUM
);
2070 if (u
->alloca_frame
)
2071 fp
-= u
->Total_frame_size
<< 3;
2073 if (get_frame_pc (this_frame
) >= prologue_end
2074 && (u
->Save_SP
|| u
->alloca_frame
) && fp
!= 0)
2079 fprintf_unfiltered (gdb_stdlog
, " (base=%s) [frame pointer]",
2080 paddress (gdbarch
, cache
->base
));
2083 && trad_frame_addr_p (cache
->saved_regs
, HPPA_SP_REGNUM
))
2085 /* Both we're expecting the SP to be saved and the SP has been
2086 saved. The entry SP value is saved at this frame's SP
2088 cache
->base
= read_memory_integer (this_sp
, word_size
, byte_order
);
2091 fprintf_unfiltered (gdb_stdlog
, " (base=%s) [saved]",
2092 paddress (gdbarch
, cache
->base
));
2096 /* The prologue has been slowly allocating stack space. Adjust
2098 cache
->base
= this_sp
- frame_size
;
2100 fprintf_unfiltered (gdb_stdlog
, " (base=%s) [unwind adjust]",
2101 paddress (gdbarch
, cache
->base
));
2104 trad_frame_set_value (cache
->saved_regs
, HPPA_SP_REGNUM
, cache
->base
);
2107 /* The PC is found in the "return register", "Millicode" uses "r31"
2108 as the return register while normal code uses "rp". */
2111 if (trad_frame_addr_p (cache
->saved_regs
, 31))
2113 cache
->saved_regs
[HPPA_PCOQ_HEAD_REGNUM
] = cache
->saved_regs
[31];
2115 fprintf_unfiltered (gdb_stdlog
, " (pc=r31) [stack] } ");
2119 ULONGEST r31
= get_frame_register_unsigned (this_frame
, 31);
2120 trad_frame_set_value (cache
->saved_regs
, HPPA_PCOQ_HEAD_REGNUM
, r31
);
2122 fprintf_unfiltered (gdb_stdlog
, " (pc=r31) [frame] } ");
2127 if (trad_frame_addr_p (cache
->saved_regs
, HPPA_RP_REGNUM
))
2129 cache
->saved_regs
[HPPA_PCOQ_HEAD_REGNUM
] =
2130 cache
->saved_regs
[HPPA_RP_REGNUM
];
2132 fprintf_unfiltered (gdb_stdlog
, " (pc=rp) [stack] } ");
2136 ULONGEST rp
= get_frame_register_unsigned (this_frame
,
2138 trad_frame_set_value (cache
->saved_regs
, HPPA_PCOQ_HEAD_REGNUM
, rp
);
2140 fprintf_unfiltered (gdb_stdlog
, " (pc=rp) [frame] } ");
2144 /* If Save_SP is set, then we expect the frame pointer to be saved in the
2145 frame. However, there is a one-insn window where we haven't saved it
2146 yet, but we've already clobbered it. Detect this case and fix it up.
2148 The prologue sequence for frame-pointer functions is:
2149 0: stw %rp, -20(%sp)
2152 c: stw,ma %r1, XX(%sp)
2154 So if we are at offset c, the r3 value that we want is not yet saved
2155 on the stack, but it's been overwritten. The prologue analyzer will
2156 set fp_in_r1 when it sees the copy insn so we know to get the value
2158 if (u
->Save_SP
&& !trad_frame_addr_p (cache
->saved_regs
, HPPA_FP_REGNUM
)
2161 ULONGEST r1
= get_frame_register_unsigned (this_frame
, 1);
2162 trad_frame_set_value (cache
->saved_regs
, HPPA_FP_REGNUM
, r1
);
2166 /* Convert all the offsets into addresses. */
2168 for (reg
= 0; reg
< gdbarch_num_regs (gdbarch
); reg
++)
2170 if (trad_frame_addr_p (cache
->saved_regs
, reg
))
2171 cache
->saved_regs
[reg
].addr
+= cache
->base
;
2176 struct gdbarch_tdep
*tdep
;
2178 tdep
= gdbarch_tdep (gdbarch
);
2180 if (tdep
->unwind_adjust_stub
)
2181 tdep
->unwind_adjust_stub (this_frame
, cache
->base
, cache
->saved_regs
);
2185 fprintf_unfiltered (gdb_stdlog
, "base=%s }",
2186 paddress (gdbarch
, ((struct hppa_frame_cache
*)*this_cache
)->base
));
2187 return (*this_cache
);
2191 hppa_frame_this_id (struct frame_info
*this_frame
, void **this_cache
,
2192 struct frame_id
*this_id
)
2194 struct hppa_frame_cache
*info
;
2195 CORE_ADDR pc
= get_frame_pc (this_frame
);
2196 struct unwind_table_entry
*u
;
2198 info
= hppa_frame_cache (this_frame
, this_cache
);
2199 u
= hppa_find_unwind_entry_in_block (this_frame
);
2201 (*this_id
) = frame_id_build (info
->base
, u
->region_start
);
2204 static struct value
*
2205 hppa_frame_prev_register (struct frame_info
*this_frame
,
2206 void **this_cache
, int regnum
)
2208 struct hppa_frame_cache
*info
= hppa_frame_cache (this_frame
, this_cache
);
2210 return hppa_frame_prev_register_helper (this_frame
,
2211 info
->saved_regs
, regnum
);
2215 hppa_frame_unwind_sniffer (const struct frame_unwind
*self
,
2216 struct frame_info
*this_frame
, void **this_cache
)
2218 if (hppa_find_unwind_entry_in_block (this_frame
))
2224 static const struct frame_unwind hppa_frame_unwind
=
2227 default_frame_unwind_stop_reason
,
2229 hppa_frame_prev_register
,
2231 hppa_frame_unwind_sniffer
2234 /* This is a generic fallback frame unwinder that kicks in if we fail all
2235 the other ones. Normally we would expect the stub and regular unwinder
2236 to work, but in some cases we might hit a function that just doesn't
2237 have any unwind information available. In this case we try to do
2238 unwinding solely based on code reading. This is obviously going to be
2239 slow, so only use this as a last resort. Currently this will only
2240 identify the stack and pc for the frame. */
2242 static struct hppa_frame_cache
*
2243 hppa_fallback_frame_cache (struct frame_info
*this_frame
, void **this_cache
)
2245 struct gdbarch
*gdbarch
= get_frame_arch (this_frame
);
2246 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2247 struct hppa_frame_cache
*cache
;
2248 unsigned int frame_size
= 0;
2253 fprintf_unfiltered (gdb_stdlog
,
2254 "{ hppa_fallback_frame_cache (frame=%d) -> ",
2255 frame_relative_level (this_frame
));
2257 cache
= FRAME_OBSTACK_ZALLOC (struct hppa_frame_cache
);
2258 (*this_cache
) = cache
;
2259 cache
->saved_regs
= trad_frame_alloc_saved_regs (this_frame
);
2261 start_pc
= get_frame_func (this_frame
);
2264 CORE_ADDR cur_pc
= get_frame_pc (this_frame
);
2267 for (pc
= start_pc
; pc
< cur_pc
; pc
+= 4)
2271 insn
= read_memory_unsigned_integer (pc
, 4, byte_order
);
2272 frame_size
+= prologue_inst_adjust_sp (insn
);
2274 /* There are limited ways to store the return pointer into the
2276 if (insn
== 0x6bc23fd9) /* stw rp,-0x14(sr0,sp) */
2278 cache
->saved_regs
[HPPA_RP_REGNUM
].addr
= -20;
2281 else if (insn
== 0x0fc212c1
2282 || insn
== 0x73c23fe1) /* std rp,-0x10(sr0,sp) */
2284 cache
->saved_regs
[HPPA_RP_REGNUM
].addr
= -16;
2291 fprintf_unfiltered (gdb_stdlog
, " frame_size=%d, found_rp=%d }\n",
2292 frame_size
, found_rp
);
2294 cache
->base
= get_frame_register_unsigned (this_frame
, HPPA_SP_REGNUM
);
2295 cache
->base
-= frame_size
;
2296 trad_frame_set_value (cache
->saved_regs
, HPPA_SP_REGNUM
, cache
->base
);
2298 if (trad_frame_addr_p (cache
->saved_regs
, HPPA_RP_REGNUM
))
2300 cache
->saved_regs
[HPPA_RP_REGNUM
].addr
+= cache
->base
;
2301 cache
->saved_regs
[HPPA_PCOQ_HEAD_REGNUM
] =
2302 cache
->saved_regs
[HPPA_RP_REGNUM
];
2307 rp
= get_frame_register_unsigned (this_frame
, HPPA_RP_REGNUM
);
2308 trad_frame_set_value (cache
->saved_regs
, HPPA_PCOQ_HEAD_REGNUM
, rp
);
2315 hppa_fallback_frame_this_id (struct frame_info
*this_frame
, void **this_cache
,
2316 struct frame_id
*this_id
)
2318 struct hppa_frame_cache
*info
=
2319 hppa_fallback_frame_cache (this_frame
, this_cache
);
2321 (*this_id
) = frame_id_build (info
->base
, get_frame_func (this_frame
));
2324 static struct value
*
2325 hppa_fallback_frame_prev_register (struct frame_info
*this_frame
,
2326 void **this_cache
, int regnum
)
2328 struct hppa_frame_cache
*info
2329 = hppa_fallback_frame_cache (this_frame
, this_cache
);
2331 return hppa_frame_prev_register_helper (this_frame
,
2332 info
->saved_regs
, regnum
);
2335 static const struct frame_unwind hppa_fallback_frame_unwind
=
2338 default_frame_unwind_stop_reason
,
2339 hppa_fallback_frame_this_id
,
2340 hppa_fallback_frame_prev_register
,
2342 default_frame_sniffer
2345 /* Stub frames, used for all kinds of call stubs. */
2346 struct hppa_stub_unwind_cache
2349 struct trad_frame_saved_reg
*saved_regs
;
2352 static struct hppa_stub_unwind_cache
*
2353 hppa_stub_frame_unwind_cache (struct frame_info
*this_frame
,
2356 struct gdbarch
*gdbarch
= get_frame_arch (this_frame
);
2357 struct hppa_stub_unwind_cache
*info
;
2358 struct unwind_table_entry
*u
;
2363 info
= FRAME_OBSTACK_ZALLOC (struct hppa_stub_unwind_cache
);
2365 info
->saved_regs
= trad_frame_alloc_saved_regs (this_frame
);
2367 info
->base
= get_frame_register_unsigned (this_frame
, HPPA_SP_REGNUM
);
2369 if (gdbarch_osabi (gdbarch
) == GDB_OSABI_HPUX_SOM
)
2371 /* HPUX uses export stubs in function calls; the export stub clobbers
2372 the return value of the caller, and, later restores it from the
2374 u
= find_unwind_entry (get_frame_pc (this_frame
));
2376 if (u
&& u
->stub_unwind
.stub_type
== EXPORT
)
2378 info
->saved_regs
[HPPA_PCOQ_HEAD_REGNUM
].addr
= info
->base
- 24;
2384 /* By default we assume that stubs do not change the rp. */
2385 info
->saved_regs
[HPPA_PCOQ_HEAD_REGNUM
].realreg
= HPPA_RP_REGNUM
;
2391 hppa_stub_frame_this_id (struct frame_info
*this_frame
,
2392 void **this_prologue_cache
,
2393 struct frame_id
*this_id
)
2395 struct hppa_stub_unwind_cache
*info
2396 = hppa_stub_frame_unwind_cache (this_frame
, this_prologue_cache
);
2399 *this_id
= frame_id_build (info
->base
, get_frame_func (this_frame
));
2402 static struct value
*
2403 hppa_stub_frame_prev_register (struct frame_info
*this_frame
,
2404 void **this_prologue_cache
, int regnum
)
2406 struct hppa_stub_unwind_cache
*info
2407 = hppa_stub_frame_unwind_cache (this_frame
, this_prologue_cache
);
2410 error (_("Requesting registers from null frame."));
2412 return hppa_frame_prev_register_helper (this_frame
,
2413 info
->saved_regs
, regnum
);
2417 hppa_stub_unwind_sniffer (const struct frame_unwind
*self
,
2418 struct frame_info
*this_frame
,
2421 CORE_ADDR pc
= get_frame_address_in_block (this_frame
);
2422 struct gdbarch
*gdbarch
= get_frame_arch (this_frame
);
2423 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
2426 || (tdep
->in_solib_call_trampoline
!= NULL
2427 && tdep
->in_solib_call_trampoline (gdbarch
, pc
, NULL
))
2428 || gdbarch_in_solib_return_trampoline (gdbarch
, pc
, NULL
))
2433 static const struct frame_unwind hppa_stub_frame_unwind
= {
2435 default_frame_unwind_stop_reason
,
2436 hppa_stub_frame_this_id
,
2437 hppa_stub_frame_prev_register
,
2439 hppa_stub_unwind_sniffer
2442 static struct frame_id
2443 hppa_dummy_id (struct gdbarch
*gdbarch
, struct frame_info
*this_frame
)
2445 return frame_id_build (get_frame_register_unsigned (this_frame
,
2447 get_frame_pc (this_frame
));
2451 hppa_unwind_pc (struct gdbarch
*gdbarch
, struct frame_info
*next_frame
)
2456 ipsw
= frame_unwind_register_unsigned (next_frame
, HPPA_IPSW_REGNUM
);
2457 pc
= frame_unwind_register_unsigned (next_frame
, HPPA_PCOQ_HEAD_REGNUM
);
2459 /* If the current instruction is nullified, then we are effectively
2460 still executing the previous instruction. Pretend we are still
2461 there. This is needed when single stepping; if the nullified
2462 instruction is on a different line, we don't want GDB to think
2463 we've stepped onto that line. */
2464 if (ipsw
& 0x00200000)
2470 /* Return the minimal symbol whose name is NAME and stub type is STUB_TYPE.
2471 Return NULL if no such symbol was found. */
2473 struct minimal_symbol
*
2474 hppa_lookup_stub_minimal_symbol (const char *name
,
2475 enum unwind_stub_types stub_type
)
2477 struct objfile
*objfile
;
2478 struct minimal_symbol
*msym
;
2480 ALL_MSYMBOLS (objfile
, msym
)
2482 if (strcmp (SYMBOL_LINKAGE_NAME (msym
), name
) == 0)
2484 struct unwind_table_entry
*u
;
2486 u
= find_unwind_entry (SYMBOL_VALUE (msym
));
2487 if (u
!= NULL
&& u
->stub_unwind
.stub_type
== stub_type
)
2496 unwind_command (char *exp
, int from_tty
)
2499 struct unwind_table_entry
*u
;
2501 /* If we have an expression, evaluate it and use it as the address. */
2503 if (exp
!= 0 && *exp
!= 0)
2504 address
= parse_and_eval_address (exp
);
2508 u
= find_unwind_entry (address
);
2512 printf_unfiltered ("Can't find unwind table entry for %s\n", exp
);
2516 printf_unfiltered ("unwind_table_entry (%s):\n", host_address_to_string (u
));
2518 printf_unfiltered ("\tregion_start = %s\n", hex_string (u
->region_start
));
2519 gdb_flush (gdb_stdout
);
2521 printf_unfiltered ("\tregion_end = %s\n", hex_string (u
->region_end
));
2522 gdb_flush (gdb_stdout
);
2524 #define pif(FLD) if (u->FLD) printf_unfiltered (" "#FLD);
2526 printf_unfiltered ("\n\tflags =");
2527 pif (Cannot_unwind
);
2529 pif (Millicode_save_sr0
);
2532 pif (Variable_Frame
);
2533 pif (Separate_Package_Body
);
2534 pif (Frame_Extension_Millicode
);
2535 pif (Stack_Overflow_Check
);
2536 pif (Two_Instruction_SP_Increment
);
2539 pif (cxx_try_catch
);
2540 pif (sched_entry_seq
);
2543 pif (Save_MRP_in_frame
);
2545 pif (Cleanup_defined
);
2546 pif (MPE_XL_interrupt_marker
);
2547 pif (HP_UX_interrupt_marker
);
2551 putchar_unfiltered ('\n');
2553 #define pin(FLD) printf_unfiltered ("\t"#FLD" = 0x%x\n", u->FLD);
2555 pin (Region_description
);
2558 pin (Total_frame_size
);
2560 if (u
->stub_unwind
.stub_type
)
2562 printf_unfiltered ("\tstub type = ");
2563 switch (u
->stub_unwind
.stub_type
)
2566 printf_unfiltered ("long branch\n");
2568 case PARAMETER_RELOCATION
:
2569 printf_unfiltered ("parameter relocation\n");
2572 printf_unfiltered ("export\n");
2575 printf_unfiltered ("import\n");
2578 printf_unfiltered ("import shlib\n");
2581 printf_unfiltered ("unknown (%d)\n", u
->stub_unwind
.stub_type
);
2586 /* Return the GDB type object for the "standard" data type of data in
2589 static struct type
*
2590 hppa32_register_type (struct gdbarch
*gdbarch
, int regnum
)
2592 if (regnum
< HPPA_FP4_REGNUM
)
2593 return builtin_type (gdbarch
)->builtin_uint32
;
2595 return builtin_type (gdbarch
)->builtin_float
;
2598 static struct type
*
2599 hppa64_register_type (struct gdbarch
*gdbarch
, int regnum
)
2601 if (regnum
< HPPA64_FP4_REGNUM
)
2602 return builtin_type (gdbarch
)->builtin_uint64
;
2604 return builtin_type (gdbarch
)->builtin_double
;
2607 /* Return non-zero if REGNUM is not a register available to the user
2608 through ptrace/ttrace. */
2611 hppa32_cannot_store_register (struct gdbarch
*gdbarch
, int regnum
)
2614 || regnum
== HPPA_PCSQ_HEAD_REGNUM
2615 || (regnum
>= HPPA_PCSQ_TAIL_REGNUM
&& regnum
< HPPA_IPSW_REGNUM
)
2616 || (regnum
> HPPA_IPSW_REGNUM
&& regnum
< HPPA_FP4_REGNUM
));
2620 hppa32_cannot_fetch_register (struct gdbarch
*gdbarch
, int regnum
)
2622 /* cr26 and cr27 are readable (but not writable) from userspace. */
2623 if (regnum
== HPPA_CR26_REGNUM
|| regnum
== HPPA_CR27_REGNUM
)
2626 return hppa32_cannot_store_register (gdbarch
, regnum
);
2630 hppa64_cannot_store_register (struct gdbarch
*gdbarch
, int regnum
)
2633 || regnum
== HPPA_PCSQ_HEAD_REGNUM
2634 || (regnum
>= HPPA_PCSQ_TAIL_REGNUM
&& regnum
< HPPA_IPSW_REGNUM
)
2635 || (regnum
> HPPA_IPSW_REGNUM
&& regnum
< HPPA64_FP4_REGNUM
));
2639 hppa64_cannot_fetch_register (struct gdbarch
*gdbarch
, int regnum
)
2641 /* cr26 and cr27 are readable (but not writable) from userspace. */
2642 if (regnum
== HPPA_CR26_REGNUM
|| regnum
== HPPA_CR27_REGNUM
)
2645 return hppa64_cannot_store_register (gdbarch
, regnum
);
2649 hppa_smash_text_address (struct gdbarch
*gdbarch
, CORE_ADDR addr
)
2651 /* The low two bits of the PC on the PA contain the privilege level.
2652 Some genius implementing a (non-GCC) compiler apparently decided
2653 this means that "addresses" in a text section therefore include a
2654 privilege level, and thus symbol tables should contain these bits.
2655 This seems like a bonehead thing to do--anyway, it seems to work
2656 for our purposes to just ignore those bits. */
2658 return (addr
&= ~0x3);
2661 /* Get the ARGIth function argument for the current function. */
2664 hppa_fetch_pointer_argument (struct frame_info
*frame
, int argi
,
2667 return get_frame_register_unsigned (frame
, HPPA_R0_REGNUM
+ 26 - argi
);
2670 static enum register_status
2671 hppa_pseudo_register_read (struct gdbarch
*gdbarch
, struct regcache
*regcache
,
2672 int regnum
, gdb_byte
*buf
)
2674 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2676 enum register_status status
;
2678 status
= regcache_raw_read_unsigned (regcache
, regnum
, &tmp
);
2679 if (status
== REG_VALID
)
2681 if (regnum
== HPPA_PCOQ_HEAD_REGNUM
|| regnum
== HPPA_PCOQ_TAIL_REGNUM
)
2683 store_unsigned_integer (buf
, sizeof tmp
, byte_order
, tmp
);
2689 hppa_find_global_pointer (struct gdbarch
*gdbarch
, struct value
*function
)
2695 hppa_frame_prev_register_helper (struct frame_info
*this_frame
,
2696 struct trad_frame_saved_reg saved_regs
[],
2699 struct gdbarch
*arch
= get_frame_arch (this_frame
);
2700 enum bfd_endian byte_order
= gdbarch_byte_order (arch
);
2702 if (regnum
== HPPA_PCOQ_TAIL_REGNUM
)
2704 int size
= register_size (arch
, HPPA_PCOQ_HEAD_REGNUM
);
2706 struct value
*pcoq_val
=
2707 trad_frame_get_prev_register (this_frame
, saved_regs
,
2708 HPPA_PCOQ_HEAD_REGNUM
);
2710 pc
= extract_unsigned_integer (value_contents_all (pcoq_val
),
2712 return frame_unwind_got_constant (this_frame
, regnum
, pc
+ 4);
2715 /* Make sure the "flags" register is zero in all unwound frames.
2716 The "flags" registers is a HP-UX specific wart, and only the code
2717 in hppa-hpux-tdep.c depends on it. However, it is easier to deal
2718 with it here. This shouldn't affect other systems since those
2719 should provide zero for the "flags" register anyway. */
2720 if (regnum
== HPPA_FLAGS_REGNUM
)
2721 return frame_unwind_got_constant (this_frame
, regnum
, 0);
2723 return trad_frame_get_prev_register (this_frame
, saved_regs
, regnum
);
2727 /* An instruction to match. */
2730 unsigned int data
; /* See if it matches this.... */
2731 unsigned int mask
; /* ... with this mask. */
2734 /* See bfd/elf32-hppa.c */
2735 static struct insn_pattern hppa_long_branch_stub
[] = {
2736 /* ldil LR'xxx,%r1 */
2737 { 0x20200000, 0xffe00000 },
2738 /* be,n RR'xxx(%sr4,%r1) */
2739 { 0xe0202002, 0xffe02002 },
2743 static struct insn_pattern hppa_long_branch_pic_stub
[] = {
2745 { 0xe8200000, 0xffe00000 },
2746 /* addil LR'xxx - ($PIC_pcrel$0 - 4), %r1 */
2747 { 0x28200000, 0xffe00000 },
2748 /* be,n RR'xxxx - ($PIC_pcrel$0 - 8)(%sr4, %r1) */
2749 { 0xe0202002, 0xffe02002 },
2753 static struct insn_pattern hppa_import_stub
[] = {
2754 /* addil LR'xxx, %dp */
2755 { 0x2b600000, 0xffe00000 },
2756 /* ldw RR'xxx(%r1), %r21 */
2757 { 0x48350000, 0xffffb000 },
2759 { 0xeaa0c000, 0xffffffff },
2760 /* ldw RR'xxx+4(%r1), %r19 */
2761 { 0x48330000, 0xffffb000 },
2765 static struct insn_pattern hppa_import_pic_stub
[] = {
2766 /* addil LR'xxx,%r19 */
2767 { 0x2a600000, 0xffe00000 },
2768 /* ldw RR'xxx(%r1),%r21 */
2769 { 0x48350000, 0xffffb000 },
2771 { 0xeaa0c000, 0xffffffff },
2772 /* ldw RR'xxx+4(%r1),%r19 */
2773 { 0x48330000, 0xffffb000 },
2777 static struct insn_pattern hppa_plt_stub
[] = {
2778 /* b,l 1b, %r20 - 1b is 3 insns before here */
2779 { 0xea9f1fdd, 0xffffffff },
2780 /* depi 0,31,2,%r20 */
2781 { 0xd6801c1e, 0xffffffff },
2785 static struct insn_pattern hppa_sigtramp
[] = {
2786 /* ldi 0, %r25 or ldi 1, %r25 */
2787 { 0x34190000, 0xfffffffd },
2788 /* ldi __NR_rt_sigreturn, %r20 */
2789 { 0x3414015a, 0xffffffff },
2790 /* be,l 0x100(%sr2, %r0), %sr0, %r31 */
2791 { 0xe4008200, 0xffffffff },
2793 { 0x08000240, 0xffffffff },
2797 /* Maximum number of instructions on the patterns above. */
2798 #define HPPA_MAX_INSN_PATTERN_LEN 4
2800 /* Return non-zero if the instructions at PC match the series
2801 described in PATTERN, or zero otherwise. PATTERN is an array of
2802 'struct insn_pattern' objects, terminated by an entry whose mask is
2805 When the match is successful, fill INSN[i] with what PATTERN[i]
2809 hppa_match_insns (struct gdbarch
*gdbarch
, CORE_ADDR pc
,
2810 struct insn_pattern
*pattern
, unsigned int *insn
)
2812 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2816 for (i
= 0; pattern
[i
].mask
; i
++)
2818 gdb_byte buf
[HPPA_INSN_SIZE
];
2820 target_read_memory (npc
, buf
, HPPA_INSN_SIZE
);
2821 insn
[i
] = extract_unsigned_integer (buf
, HPPA_INSN_SIZE
, byte_order
);
2822 if ((insn
[i
] & pattern
[i
].mask
) == pattern
[i
].data
)
2831 /* This relaxed version of the insstruction matcher allows us to match
2832 from somewhere inside the pattern, by looking backwards in the
2833 instruction scheme. */
2836 hppa_match_insns_relaxed (struct gdbarch
*gdbarch
, CORE_ADDR pc
,
2837 struct insn_pattern
*pattern
, unsigned int *insn
)
2839 int offset
, len
= 0;
2841 while (pattern
[len
].mask
)
2844 for (offset
= 0; offset
< len
; offset
++)
2845 if (hppa_match_insns (gdbarch
, pc
- offset
* HPPA_INSN_SIZE
,
2853 hppa_in_dyncall (CORE_ADDR pc
)
2855 struct unwind_table_entry
*u
;
2857 u
= find_unwind_entry (hppa_symbol_address ("$$dyncall"));
2861 return (pc
>= u
->region_start
&& pc
<= u
->region_end
);
2865 hppa_in_solib_call_trampoline (struct gdbarch
*gdbarch
,
2866 CORE_ADDR pc
, char *name
)
2868 unsigned int insn
[HPPA_MAX_INSN_PATTERN_LEN
];
2869 struct unwind_table_entry
*u
;
2871 if (in_plt_section (pc
, name
) || hppa_in_dyncall (pc
))
2874 /* The GNU toolchain produces linker stubs without unwind
2875 information. Since the pattern matching for linker stubs can be
2876 quite slow, so bail out if we do have an unwind entry. */
2878 u
= find_unwind_entry (pc
);
2883 (hppa_match_insns_relaxed (gdbarch
, pc
, hppa_import_stub
, insn
)
2884 || hppa_match_insns_relaxed (gdbarch
, pc
, hppa_import_pic_stub
, insn
)
2885 || hppa_match_insns_relaxed (gdbarch
, pc
, hppa_long_branch_stub
, insn
)
2886 || hppa_match_insns_relaxed (gdbarch
, pc
,
2887 hppa_long_branch_pic_stub
, insn
));
2890 /* This code skips several kind of "trampolines" used on PA-RISC
2891 systems: $$dyncall, import stubs and PLT stubs. */
2894 hppa_skip_trampoline_code (struct frame_info
*frame
, CORE_ADDR pc
)
2896 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
2897 struct type
*func_ptr_type
= builtin_type (gdbarch
)->builtin_func_ptr
;
2899 unsigned int insn
[HPPA_MAX_INSN_PATTERN_LEN
];
2902 /* $$dyncall handles both PLABELs and direct addresses. */
2903 if (hppa_in_dyncall (pc
))
2905 pc
= get_frame_register_unsigned (frame
, HPPA_R0_REGNUM
+ 22);
2907 /* PLABELs have bit 30 set; if it's a PLABEL, then dereference it. */
2909 pc
= read_memory_typed_address (pc
& ~0x3, func_ptr_type
);
2914 dp_rel
= hppa_match_insns (gdbarch
, pc
, hppa_import_stub
, insn
);
2915 if (dp_rel
|| hppa_match_insns (gdbarch
, pc
, hppa_import_pic_stub
, insn
))
2917 /* Extract the target address from the addil/ldw sequence. */
2918 pc
= hppa_extract_21 (insn
[0]) + hppa_extract_14 (insn
[1]);
2921 pc
+= get_frame_register_unsigned (frame
, HPPA_DP_REGNUM
);
2923 pc
+= get_frame_register_unsigned (frame
, HPPA_R0_REGNUM
+ 19);
2928 if (in_plt_section (pc
, NULL
))
2930 pc
= read_memory_typed_address (pc
, func_ptr_type
);
2932 /* If the PLT slot has not yet been resolved, the target will be
2934 if (in_plt_section (pc
, NULL
))
2936 /* Sanity check: are we pointing to the PLT stub? */
2937 if (!hppa_match_insns (gdbarch
, pc
, hppa_plt_stub
, insn
))
2939 warning (_("Cannot resolve PLT stub at %s."),
2940 paddress (gdbarch
, pc
));
2944 /* This should point to the fixup routine. */
2945 pc
= read_memory_typed_address (pc
+ 8, func_ptr_type
);
2953 /* Here is a table of C type sizes on hppa with various compiles
2954 and options. I measured this on PA 9000/800 with HP-UX 11.11
2955 and these compilers:
2957 /usr/ccs/bin/cc HP92453-01 A.11.01.21
2958 /opt/ansic/bin/cc HP92453-01 B.11.11.28706.GP
2959 /opt/aCC/bin/aCC B3910B A.03.45
2960 gcc gcc 3.3.2 native hppa2.0w-hp-hpux11.11
2962 cc : 1 2 4 4 8 : 4 8 -- : 4 4
2963 ansic +DA1.1 : 1 2 4 4 8 : 4 8 16 : 4 4
2964 ansic +DA2.0 : 1 2 4 4 8 : 4 8 16 : 4 4
2965 ansic +DA2.0W : 1 2 4 8 8 : 4 8 16 : 8 8
2966 acc +DA1.1 : 1 2 4 4 8 : 4 8 16 : 4 4
2967 acc +DA2.0 : 1 2 4 4 8 : 4 8 16 : 4 4
2968 acc +DA2.0W : 1 2 4 8 8 : 4 8 16 : 8 8
2969 gcc : 1 2 4 4 8 : 4 8 16 : 4 4
2973 compiler and options
2974 char, short, int, long, long long
2975 float, double, long double
2978 So all these compilers use either ILP32 or LP64 model.
2979 TODO: gcc has more options so it needs more investigation.
2981 For floating point types, see:
2983 http://docs.hp.com/hpux/pdf/B3906-90006.pdf
2984 HP-UX floating-point guide, hpux 11.00
2986 -- chastain 2003-12-18 */
2988 static struct gdbarch
*
2989 hppa_gdbarch_init (struct gdbarch_info info
, struct gdbarch_list
*arches
)
2991 struct gdbarch_tdep
*tdep
;
2992 struct gdbarch
*gdbarch
;
2994 /* Try to determine the ABI of the object we are loading. */
2995 if (info
.abfd
!= NULL
&& info
.osabi
== GDB_OSABI_UNKNOWN
)
2997 /* If it's a SOM file, assume it's HP/UX SOM. */
2998 if (bfd_get_flavour (info
.abfd
) == bfd_target_som_flavour
)
2999 info
.osabi
= GDB_OSABI_HPUX_SOM
;
3002 /* find a candidate among the list of pre-declared architectures. */
3003 arches
= gdbarch_list_lookup_by_info (arches
, &info
);
3005 return (arches
->gdbarch
);
3007 /* If none found, then allocate and initialize one. */
3008 tdep
= XZALLOC (struct gdbarch_tdep
);
3009 gdbarch
= gdbarch_alloc (&info
, tdep
);
3011 /* Determine from the bfd_arch_info structure if we are dealing with
3012 a 32 or 64 bits architecture. If the bfd_arch_info is not available,
3013 then default to a 32bit machine. */
3014 if (info
.bfd_arch_info
!= NULL
)
3015 tdep
->bytes_per_address
=
3016 info
.bfd_arch_info
->bits_per_address
/ info
.bfd_arch_info
->bits_per_byte
;
3018 tdep
->bytes_per_address
= 4;
3020 tdep
->find_global_pointer
= hppa_find_global_pointer
;
3022 /* Some parts of the gdbarch vector depend on whether we are running
3023 on a 32 bits or 64 bits target. */
3024 switch (tdep
->bytes_per_address
)
3027 set_gdbarch_num_regs (gdbarch
, hppa32_num_regs
);
3028 set_gdbarch_register_name (gdbarch
, hppa32_register_name
);
3029 set_gdbarch_register_type (gdbarch
, hppa32_register_type
);
3030 set_gdbarch_cannot_store_register (gdbarch
,
3031 hppa32_cannot_store_register
);
3032 set_gdbarch_cannot_fetch_register (gdbarch
,
3033 hppa32_cannot_fetch_register
);
3036 set_gdbarch_num_regs (gdbarch
, hppa64_num_regs
);
3037 set_gdbarch_register_name (gdbarch
, hppa64_register_name
);
3038 set_gdbarch_register_type (gdbarch
, hppa64_register_type
);
3039 set_gdbarch_dwarf2_reg_to_regnum (gdbarch
, hppa64_dwarf_reg_to_regnum
);
3040 set_gdbarch_cannot_store_register (gdbarch
,
3041 hppa64_cannot_store_register
);
3042 set_gdbarch_cannot_fetch_register (gdbarch
,
3043 hppa64_cannot_fetch_register
);
3046 internal_error (__FILE__
, __LINE__
, _("Unsupported address size: %d"),
3047 tdep
->bytes_per_address
);
3050 set_gdbarch_long_bit (gdbarch
, tdep
->bytes_per_address
* TARGET_CHAR_BIT
);
3051 set_gdbarch_ptr_bit (gdbarch
, tdep
->bytes_per_address
* TARGET_CHAR_BIT
);
3053 /* The following gdbarch vector elements are the same in both ILP32
3054 and LP64, but might show differences some day. */
3055 set_gdbarch_long_long_bit (gdbarch
, 64);
3056 set_gdbarch_long_double_bit (gdbarch
, 128);
3057 set_gdbarch_long_double_format (gdbarch
, floatformats_ia64_quad
);
3059 /* The following gdbarch vector elements do not depend on the address
3060 size, or in any other gdbarch element previously set. */
3061 set_gdbarch_skip_prologue (gdbarch
, hppa_skip_prologue
);
3062 set_gdbarch_in_function_epilogue_p (gdbarch
,
3063 hppa_in_function_epilogue_p
);
3064 set_gdbarch_inner_than (gdbarch
, core_addr_greaterthan
);
3065 set_gdbarch_sp_regnum (gdbarch
, HPPA_SP_REGNUM
);
3066 set_gdbarch_fp0_regnum (gdbarch
, HPPA_FP0_REGNUM
);
3067 set_gdbarch_addr_bits_remove (gdbarch
, hppa_smash_text_address
);
3068 set_gdbarch_smash_text_address (gdbarch
, hppa_smash_text_address
);
3069 set_gdbarch_believe_pcc_promotion (gdbarch
, 1);
3070 set_gdbarch_read_pc (gdbarch
, hppa_read_pc
);
3071 set_gdbarch_write_pc (gdbarch
, hppa_write_pc
);
3073 /* Helper for function argument information. */
3074 set_gdbarch_fetch_pointer_argument (gdbarch
, hppa_fetch_pointer_argument
);
3076 set_gdbarch_print_insn (gdbarch
, print_insn_hppa
);
3078 /* When a hardware watchpoint triggers, we'll move the inferior past
3079 it by removing all eventpoints; stepping past the instruction
3080 that caused the trigger; reinserting eventpoints; and checking
3081 whether any watched location changed. */
3082 set_gdbarch_have_nonsteppable_watchpoint (gdbarch
, 1);
3084 /* Inferior function call methods. */
3085 switch (tdep
->bytes_per_address
)
3088 set_gdbarch_push_dummy_call (gdbarch
, hppa32_push_dummy_call
);
3089 set_gdbarch_frame_align (gdbarch
, hppa32_frame_align
);
3090 set_gdbarch_convert_from_func_ptr_addr
3091 (gdbarch
, hppa32_convert_from_func_ptr_addr
);
3094 set_gdbarch_push_dummy_call (gdbarch
, hppa64_push_dummy_call
);
3095 set_gdbarch_frame_align (gdbarch
, hppa64_frame_align
);
3098 internal_error (__FILE__
, __LINE__
, _("bad switch"));
3101 /* Struct return methods. */
3102 switch (tdep
->bytes_per_address
)
3105 set_gdbarch_return_value (gdbarch
, hppa32_return_value
);
3108 set_gdbarch_return_value (gdbarch
, hppa64_return_value
);
3111 internal_error (__FILE__
, __LINE__
, _("bad switch"));
3114 set_gdbarch_breakpoint_from_pc (gdbarch
, hppa_breakpoint_from_pc
);
3115 set_gdbarch_pseudo_register_read (gdbarch
, hppa_pseudo_register_read
);
3117 /* Frame unwind methods. */
3118 set_gdbarch_dummy_id (gdbarch
, hppa_dummy_id
);
3119 set_gdbarch_unwind_pc (gdbarch
, hppa_unwind_pc
);
3121 /* Hook in ABI-specific overrides, if they have been registered. */
3122 gdbarch_init_osabi (info
, gdbarch
);
3124 /* Hook in the default unwinders. */
3125 frame_unwind_append_unwinder (gdbarch
, &hppa_stub_frame_unwind
);
3126 frame_unwind_append_unwinder (gdbarch
, &hppa_frame_unwind
);
3127 frame_unwind_append_unwinder (gdbarch
, &hppa_fallback_frame_unwind
);
3133 hppa_dump_tdep (struct gdbarch
*gdbarch
, struct ui_file
*file
)
3135 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
3137 fprintf_unfiltered (file
, "bytes_per_address = %d\n",
3138 tdep
->bytes_per_address
);
3139 fprintf_unfiltered (file
, "elf = %s\n", tdep
->is_elf
? "yes" : "no");
3142 /* Provide a prototype to silence -Wmissing-prototypes. */
3143 extern initialize_file_ftype _initialize_hppa_tdep
;
3146 _initialize_hppa_tdep (void)
3148 struct cmd_list_element
*c
;
3150 gdbarch_register (bfd_arch_hppa
, hppa_gdbarch_init
, hppa_dump_tdep
);
3152 hppa_objfile_priv_data
= register_objfile_data ();
3154 add_cmd ("unwind", class_maintenance
, unwind_command
,
3155 _("Print unwind table entry at given address."),
3156 &maintenanceprintlist
);
3158 /* Debug this files internals. */
3159 add_setshow_boolean_cmd ("hppa", class_maintenance
, &hppa_debug
, _("\
3160 Set whether hppa target specific debugging information should be displayed."),
3162 Show whether hppa target specific debugging information is displayed."), _("\
3163 This flag controls whether hppa target specific debugging information is\n\
3164 displayed. This information is particularly useful for debugging frame\n\
3165 unwinding problems."),
3167 NULL
, /* FIXME: i18n: hppa debug flag is %s. */
3168 &setdebuglist
, &showdebuglist
);