1 /* Machine-dependent code which would otherwise be in inflow.c and core.c,
2 for GDB, the GNU debugger. This code is for the HP PA-RISC cpu.
3 Copyright 1986, 1987, 1989, 1990, 1991, 1992, 1993 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 2 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, write to the Free Software
22 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
29 /* For argument passing to the inferior */
33 #include <sys/types.h>
36 #include <sys/param.h>
39 #include <sys/ioctl.h>
41 #ifdef COFF_ENCAPSULATE
42 #include "a.out.encap.h"
47 #define N_SET_MAGIC(exec, val) ((exec).a_magic = (val))
50 /*#include <sys/user.h> After a.out.h */
53 #include <machine/psl.h>
62 static int restore_pc_queue
PARAMS ((struct frame_saved_regs
*fsr
));
63 static int hppa_alignof
PARAMS ((struct type
*arg
));
64 CORE_ADDR frame_saved_pc
PARAMS ((FRAME frame
));
67 /* Routines to extract various sized constants out of hppa
70 /* This assumes that no garbage lies outside of the lower bits of
74 sign_extend (val
, bits
)
77 return (int)(val
>> bits
- 1 ? (-1 << bits
) | val
: val
);
80 /* For many immediate values the sign bit is the low bit! */
83 low_sign_extend (val
, bits
)
86 return (int)((val
& 0x1 ? (-1 << (bits
- 1)) : 0) | val
>> 1);
88 /* extract the immediate field from a ld{bhw}s instruction */
91 get_field (val
, from
, to
)
92 unsigned val
, from
, to
;
95 return val
& ((1 << 32 - from
) - 1);
99 set_field (val
, from
, to
, new_val
)
100 unsigned *val
, from
, to
;
102 unsigned mask
= ~((1 << (to
- from
+ 1)) << (31 - from
));
103 return *val
= *val
& mask
| (new_val
<< (31 - from
));
106 /* extract a 3-bit space register number from a be, ble, mtsp or mfsp */
111 return GET_FIELD (word
, 18, 18) << 2 | GET_FIELD (word
, 16, 17);
114 extract_5_load (word
)
117 return low_sign_extend (word
>> 16 & MASK_5
, 5);
120 /* extract the immediate field from a st{bhw}s instruction */
123 extract_5_store (word
)
126 return low_sign_extend (word
& MASK_5
, 5);
129 /* extract the immediate field from a break instruction */
132 extract_5r_store (word
)
135 return (word
& MASK_5
);
138 /* extract the immediate field from a {sr}sm instruction */
141 extract_5R_store (word
)
144 return (word
>> 16 & MASK_5
);
147 /* extract an 11 bit immediate field */
153 return low_sign_extend (word
& MASK_11
, 11);
156 /* extract a 14 bit immediate field */
162 return low_sign_extend (word
& MASK_14
, 14);
165 /* deposit a 14 bit constant in a word */
168 deposit_14 (opnd
, word
)
172 unsigned sign
= (opnd
< 0 ? 1 : 0);
174 return word
| ((unsigned)opnd
<< 1 & MASK_14
) | sign
;
177 /* extract a 21 bit constant */
187 val
= GET_FIELD (word
, 20, 20);
189 val
|= GET_FIELD (word
, 9, 19);
191 val
|= GET_FIELD (word
, 5, 6);
193 val
|= GET_FIELD (word
, 0, 4);
195 val
|= GET_FIELD (word
, 7, 8);
196 return sign_extend (val
, 21) << 11;
199 /* deposit a 21 bit constant in a word. Although 21 bit constants are
200 usually the top 21 bits of a 32 bit constant, we assume that only
201 the low 21 bits of opnd are relevant */
204 deposit_21 (opnd
, word
)
209 val
|= GET_FIELD (opnd
, 11 + 14, 11 + 18);
211 val
|= GET_FIELD (opnd
, 11 + 12, 11 + 13);
213 val
|= GET_FIELD (opnd
, 11 + 19, 11 + 20);
215 val
|= GET_FIELD (opnd
, 11 + 1, 11 + 11);
217 val
|= GET_FIELD (opnd
, 11 + 0, 11 + 0);
221 /* extract a 12 bit constant from branch instructions */
227 return sign_extend (GET_FIELD (word
, 19, 28) |
228 GET_FIELD (word
, 29, 29) << 10 |
229 (word
& 0x1) << 11, 12) << 2;
232 /* extract a 17 bit constant from branch instructions, returning the
233 19 bit signed value. */
239 return sign_extend (GET_FIELD (word
, 19, 28) |
240 GET_FIELD (word
, 29, 29) << 10 |
241 GET_FIELD (word
, 11, 15) << 11 |
242 (word
& 0x1) << 16, 17) << 2;
245 static int use_unwind
= 0;
247 /* Lookup the unwind (stack backtrace) info for the given PC. We search all
248 of the objfiles seeking the unwind table entry for this PC. Each objfile
249 contains a sorted list of struct unwind_table_entry. Since we do a binary
250 search of the unwind tables, we depend upon them to be sorted. */
252 static struct unwind_table_entry
*
253 find_unwind_entry(pc
)
256 int first
, middle
, last
;
257 struct objfile
*objfile
;
259 ALL_OBJFILES (objfile
)
261 struct obj_unwind_info
*ui
;
263 ui
= OBJ_UNWIND_INFO (objfile
);
268 /* First, check the cache */
271 && pc
>= ui
->cache
->region_start
272 && pc
<= ui
->cache
->region_end
)
275 /* Not in the cache, do a binary search */
280 while (first
<= last
)
282 middle
= (first
+ last
) / 2;
283 if (pc
>= ui
->table
[middle
].region_start
284 && pc
<= ui
->table
[middle
].region_end
)
286 ui
->cache
= &ui
->table
[middle
];
287 return &ui
->table
[middle
];
290 if (pc
< ui
->table
[middle
].region_start
)
295 } /* ALL_OBJFILES() */
299 /* Called when no unwind descriptor was found for PC. Returns 1 if it
300 appears that PC is in a linker stub. */
301 static int pc_in_linker_stub
PARAMS ((CORE_ADDR
));
304 pc_in_linker_stub (pc
)
307 int found_magic_instruction
= 0;
310 /* We are looking for something like
312 ; $$dyncall jams RP into this special spot in the frame (RP')
313 ; before calling the "call stub"
316 ldsid (rp),r1 ; Get space associated with RP into r1
317 mtsp r1,sp ; Move it into space register 0
318 be,n 0(sr0),rp) ; back to your regularly scheduled program
321 /* Maximum known linker stub size is 4 instructions. Search forward
322 from the given PC, then backward. */
323 for (i
= 0; i
< 4; i
++)
325 /* If we hit something with an unwind, stop searching this direction.
327 if (find_unwind_entry (pc + i * 4) != 0)
330 /* Check for ldsid (rp),r1 which is the magic instruction for a
331 return from a cross-space function call. */
332 if (read_memory_integer (pc
+ i
* 4, 4) == 0x004010a1)
334 found_magic_instruction
= 1;
337 /* Add code to handle long call/branch and argument relocation stubs
341 if (found_magic_instruction
!= 0)
344 /* Now look backward. */
345 for (i
= 0; i
< 4; i
++)
347 /* If we hit something with an unwind, stop searching this direction.
349 if (find_unwind_entry (pc - i * 4) != 0)
352 /* Check for ldsid (rp),r1 which is the magic instruction for a
353 return from a cross-space function call. */
354 if (read_memory_integer (pc
- i
* 4, 4) == 0x004010a1)
356 found_magic_instruction
= 1;
359 /* Add code to handle long call/branch and argument relocation stubs
362 return found_magic_instruction
;
366 find_return_regnum(pc
)
369 struct unwind_table_entry
*u
;
371 u
= find_unwind_entry (pc
);
382 /* Return size of frame, or -1 if we should use a frame pointer. */
384 find_proc_framesize(pc
)
387 struct unwind_table_entry
*u
;
392 u
= find_unwind_entry (pc
);
396 if (pc_in_linker_stub (pc
))
397 /* Linker stubs have a zero size frame. */
404 /* If this bit is set, it means there is a frame pointer and we should
408 return u
->Total_frame_size
<< 3;
411 /* Return offset from sp at which rp is saved, or 0 if not saved. */
412 static int rp_saved
PARAMS ((CORE_ADDR
));
418 struct unwind_table_entry
*u
;
420 u
= find_unwind_entry (pc
);
424 if (pc_in_linker_stub (pc
))
425 /* This is the so-called RP'. */
438 frameless_function_invocation (frame
)
444 struct unwind_table_entry
*u
;
446 u
= find_unwind_entry (frame
->pc
);
451 return (u
->Total_frame_size
== 0);
454 return frameless_look_for_prologue (frame
);
458 saved_pc_after_call (frame
)
463 ret_regnum
= find_return_regnum (get_frame_pc (frame
));
465 return read_register (ret_regnum
) & ~0x3;
469 frame_saved_pc (frame
)
472 CORE_ADDR pc
= get_frame_pc (frame
);
474 if (frameless_function_invocation (frame
))
478 ret_regnum
= find_return_regnum (pc
);
480 return read_register (ret_regnum
) & ~0x3;
484 int rp_offset
= rp_saved (pc
);
487 return read_register (RP_REGNUM
) & ~0x3;
489 return read_memory_integer (frame
->frame
- rp_offset
, 4) & ~0x3;
493 /* We need to correct the PC and the FP for the outermost frame when we are
497 init_extra_frame_info (fromleaf
, frame
)
499 struct frame_info
*frame
;
504 if (frame
->next
) /* Only do this for outermost frame */
507 flags
= read_register (FLAGS_REGNUM
);
508 if (flags
& 2) /* In system call? */
509 frame
->pc
= read_register (31) & ~0x3;
511 /* The outermost frame is always derived from PC-framesize */
512 framesize
= find_proc_framesize(frame
->pc
);
514 frame
->frame
= read_register (FP_REGNUM
);
516 frame
->frame
= read_register (SP_REGNUM
) - framesize
;
518 if (!frameless_function_invocation (frame
)) /* Frameless? */
519 return; /* No, quit now */
521 /* For frameless functions, we need to look at the caller's frame */
522 framesize
= find_proc_framesize(FRAME_SAVED_PC(frame
));
524 frame
->frame
-= framesize
;
529 struct frame_info
*frame
;
533 framesize
= find_proc_framesize(FRAME_SAVED_PC(frame
));
536 return frame
->frame
- framesize
;
538 return read_memory_integer (frame
->frame
, 4);
541 /* To see if a frame chain is valid, see if the caller looks like it
542 was compiled with gcc. */
545 frame_chain_valid (chain
, thisframe
)
549 struct minimal_symbol
*msym
;
557 struct unwind_table_entry
*u
;
559 u
= find_unwind_entry (thisframe
->pc
);
562 /* FIXME, we should probably fall back to some other technique,
563 if we want to deal gracefully with stripped executables or others
564 without unwind info. */
567 if (u
->Save_SP
|| u
->Total_frame_size
)
570 if (pc_in_linker_stub (thisframe
->pc
))
577 msym
= lookup_minimal_symbol_by_pc (FRAME_SAVED_PC (thisframe
));
580 && (strcmp (SYMBOL_NAME (msym
), "_start") == 0))
588 * These functions deal with saving and restoring register state
589 * around a function call in the inferior. They keep the stack
590 * double-word aligned; eventually, on an hp700, the stack will have
591 * to be aligned to a 64-byte boundary.
597 register CORE_ADDR sp
;
602 /* Space for "arguments"; the RP goes in here. */
603 sp
= read_register (SP_REGNUM
) + 48;
604 int_buffer
= read_register (RP_REGNUM
) | 0x3;
605 write_memory (sp
- 20, (char *)&int_buffer
, 4);
607 int_buffer
= read_register (FP_REGNUM
);
608 write_memory (sp
, (char *)&int_buffer
, 4);
610 write_register (FP_REGNUM
, sp
);
614 for (regnum
= 1; regnum
< 32; regnum
++)
615 if (regnum
!= RP_REGNUM
&& regnum
!= FP_REGNUM
)
616 sp
= push_word (sp
, read_register (regnum
));
620 for (regnum
= FP0_REGNUM
; regnum
< NUM_REGS
; regnum
++)
622 read_register_bytes (REGISTER_BYTE (regnum
), (char *)&freg_buffer
, 8);
623 sp
= push_bytes (sp
, (char *)&freg_buffer
, 8);
625 sp
= push_word (sp
, read_register (IPSW_REGNUM
));
626 sp
= push_word (sp
, read_register (SAR_REGNUM
));
627 sp
= push_word (sp
, read_register (PCOQ_HEAD_REGNUM
));
628 sp
= push_word (sp
, read_register (PCSQ_HEAD_REGNUM
));
629 sp
= push_word (sp
, read_register (PCOQ_TAIL_REGNUM
));
630 sp
= push_word (sp
, read_register (PCSQ_TAIL_REGNUM
));
631 write_register (SP_REGNUM
, sp
);
634 find_dummy_frame_regs (frame
, frame_saved_regs
)
635 struct frame_info
*frame
;
636 struct frame_saved_regs
*frame_saved_regs
;
638 CORE_ADDR fp
= frame
->frame
;
641 frame_saved_regs
->regs
[RP_REGNUM
] = fp
- 20 & ~0x3;
642 frame_saved_regs
->regs
[FP_REGNUM
] = fp
;
643 frame_saved_regs
->regs
[1] = fp
+ 8;
645 for (fp
+= 12, i
= 3; i
< 32; i
++)
649 frame_saved_regs
->regs
[i
] = fp
;
655 for (i
= FP0_REGNUM
; i
< NUM_REGS
; i
++, fp
+= 8)
656 frame_saved_regs
->regs
[i
] = fp
;
658 frame_saved_regs
->regs
[IPSW_REGNUM
] = fp
;
659 frame_saved_regs
->regs
[SAR_REGNUM
] = fp
+ 4;
660 frame_saved_regs
->regs
[PCOQ_HEAD_REGNUM
] = fp
+ 8;
661 frame_saved_regs
->regs
[PCSQ_HEAD_REGNUM
] = fp
+ 12;
662 frame_saved_regs
->regs
[PCOQ_TAIL_REGNUM
] = fp
+ 16;
663 frame_saved_regs
->regs
[PCSQ_TAIL_REGNUM
] = fp
+ 20;
669 register FRAME frame
= get_current_frame ();
670 register CORE_ADDR fp
;
672 struct frame_saved_regs fsr
;
673 struct frame_info
*fi
;
676 fi
= get_frame_info (frame
);
678 get_frame_saved_regs (fi
, &fsr
);
680 if (fsr
.regs
[IPSW_REGNUM
]) /* Restoring a call dummy frame */
681 restore_pc_queue (&fsr
);
683 for (regnum
= 31; regnum
> 0; regnum
--)
684 if (fsr
.regs
[regnum
])
685 write_register (regnum
, read_memory_integer (fsr
.regs
[regnum
], 4));
687 for (regnum
= NUM_REGS
- 1; regnum
>= FP0_REGNUM
; regnum
--)
688 if (fsr
.regs
[regnum
])
690 read_memory (fsr
.regs
[regnum
], (char *)&freg_buffer
, 8);
691 write_register_bytes (REGISTER_BYTE (regnum
), (char *)&freg_buffer
, 8);
694 if (fsr
.regs
[IPSW_REGNUM
])
695 write_register (IPSW_REGNUM
,
696 read_memory_integer (fsr
.regs
[IPSW_REGNUM
], 4));
698 if (fsr
.regs
[SAR_REGNUM
])
699 write_register (SAR_REGNUM
,
700 read_memory_integer (fsr
.regs
[SAR_REGNUM
], 4));
702 if (fsr
.regs
[PCOQ_TAIL_REGNUM
])
703 write_register (PCOQ_TAIL_REGNUM
,
704 read_memory_integer (fsr
.regs
[PCOQ_TAIL_REGNUM
], 4));
706 write_register (FP_REGNUM
, read_memory_integer (fp
, 4));
708 if (fsr
.regs
[IPSW_REGNUM
]) /* call dummy */
709 write_register (SP_REGNUM
, fp
- 48);
711 write_register (SP_REGNUM
, fp
);
713 flush_cached_frames ();
714 set_current_frame (create_new_frame (read_register (FP_REGNUM
),
719 * After returning to a dummy on the stack, restore the instruction
720 * queue space registers. */
723 restore_pc_queue (fsr
)
724 struct frame_saved_regs
*fsr
;
726 CORE_ADDR pc
= read_pc ();
727 CORE_ADDR new_pc
= read_memory_integer (fsr
->regs
[PCOQ_HEAD_REGNUM
], 4);
732 /* Advance past break instruction in the call dummy. */
733 write_register (PCOQ_HEAD_REGNUM
, pc
+ 4);
734 write_register (PCOQ_TAIL_REGNUM
, pc
+ 8);
737 * HPUX doesn't let us set the space registers or the space
738 * registers of the PC queue through ptrace. Boo, hiss.
739 * Conveniently, the call dummy has this sequence of instructions
744 * So, load up the registers and single step until we are in the
748 write_register (21, read_memory_integer (fsr
->regs
[PCSQ_HEAD_REGNUM
], 4));
749 write_register (22, new_pc
);
751 for (insn_count
= 0; insn_count
< 3; insn_count
++)
758 stop_signal
= WTERMSIG (w
);
759 terminal_ours_for_output ();
760 printf ("\nProgram terminated with signal %d, %s\n",
761 stop_signal
, safe_strsignal (stop_signal
));
766 fetch_inferior_registers (-1);
771 hppa_push_arguments (nargs
, args
, sp
, struct_return
, struct_addr
)
776 CORE_ADDR struct_addr
;
778 /* array of arguments' offsets */
779 int *offset
= (int *)alloca(nargs
* sizeof (int));
783 for (i
= 0; i
< nargs
; i
++)
785 /* Coerce chars to int & float to double if necessary */
786 args
[i
] = value_arg_coerce (args
[i
]);
788 cum
+= TYPE_LENGTH (VALUE_TYPE (args
[i
]));
790 /* value must go at proper alignment. Assume alignment is a
792 alignment
= hppa_alignof (VALUE_TYPE (args
[i
]));
794 cum
= (cum
+ alignment
) & -alignment
;
797 sp
+= max ((cum
+ 7) & -8, 16);
799 for (i
= 0; i
< nargs
; i
++)
800 write_memory (sp
+ offset
[i
], VALUE_CONTENTS (args
[i
]),
801 TYPE_LENGTH (VALUE_TYPE (args
[i
])));
804 write_register (28, struct_addr
);
809 * Insert the specified number of args and function address
810 * into a call sequence of the above form stored at DUMMYNAME.
812 * On the hppa we need to call the stack dummy through $$dyncall.
813 * Therefore our version of FIX_CALL_DUMMY takes an extra argument,
814 * real_pc, which is the location where gdb should start up the
815 * inferior to do the function call.
819 hppa_fix_call_dummy (dummy
, pc
, fun
, nargs
, args
, type
, gcc_p
)
820 REGISTER_TYPE
*dummy
;
828 CORE_ADDR dyncall_addr
, sr4export_addr
;
829 struct minimal_symbol
*msymbol
;
831 msymbol
= lookup_minimal_symbol ("$$dyncall", (struct objfile
*) NULL
);
833 error ("Can't find an address for $$dyncall trampoline");
835 dyncall_addr
= SYMBOL_VALUE_ADDRESS (msymbol
);
837 msymbol
= lookup_minimal_symbol ("_sr4export", (struct objfile
*) NULL
);
839 error ("Can't find an address for _sr4export trampoline");
841 sr4export_addr
= SYMBOL_VALUE_ADDRESS (msymbol
);
843 dummy
[9] = deposit_21 (fun
>> 11, dummy
[9]);
844 dummy
[10] = deposit_14 (fun
& MASK_11
, dummy
[10]);
845 dummy
[12] = deposit_21 (sr4export_addr
>> 11, dummy
[12]);
846 dummy
[13] = deposit_14 (sr4export_addr
& MASK_11
, dummy
[13]);
848 write_register (22, pc
);
853 /* return the alignment of a type in bytes. Structures have the maximum
854 alignment required by their fields. */
860 int max_align
, align
, i
;
861 switch (TYPE_CODE (arg
))
866 return TYPE_LENGTH (arg
);
867 case TYPE_CODE_ARRAY
:
868 return hppa_alignof (TYPE_FIELD_TYPE (arg
, 0));
869 case TYPE_CODE_STRUCT
:
870 case TYPE_CODE_UNION
:
872 for (i
= 0; i
< TYPE_NFIELDS (arg
); i
++)
874 /* Bit fields have no real alignment. */
875 if (!TYPE_FIELD_BITPOS (arg
, i
))
877 align
= hppa_alignof (TYPE_FIELD_TYPE (arg
, i
));
878 max_align
= max (max_align
, align
);
887 /* Print the register regnum, or all registers if regnum is -1 */
889 pa_do_registers_info (regnum
, fpregs
)
893 char raw_regs
[REGISTER_BYTES
];
896 for (i
= 0; i
< NUM_REGS
; i
++)
897 read_relative_register_raw_bytes (i
, raw_regs
+ REGISTER_BYTE (i
));
899 pa_print_registers (raw_regs
, regnum
, fpregs
);
900 else if (regnum
< FP0_REGNUM
)
901 printf ("%s %x\n", reg_names
[regnum
], *(long *)(raw_regs
+
902 REGISTER_BYTE (regnum
)));
904 pa_print_fp_reg (regnum
);
907 pa_print_registers (raw_regs
, regnum
, fpregs
)
914 for (i
= 0; i
< 18; i
++)
915 printf ("%8.8s: %8x %8.8s: %8x %8.8s: %8x %8.8s: %8x\n",
917 *(int *)(raw_regs
+ REGISTER_BYTE (i
)),
919 *(int *)(raw_regs
+ REGISTER_BYTE (i
+ 18)),
921 *(int *)(raw_regs
+ REGISTER_BYTE (i
+ 36)),
923 *(int *)(raw_regs
+ REGISTER_BYTE (i
+ 54)));
926 for (i
= 72; i
< NUM_REGS
; i
++)
933 unsigned char raw_buffer
[MAX_REGISTER_RAW_SIZE
];
934 unsigned char virtual_buffer
[MAX_REGISTER_VIRTUAL_SIZE
];
937 /* Get the data in raw format, then convert also to virtual format. */
938 read_relative_register_raw_bytes (i
, raw_buffer
);
939 REGISTER_CONVERT_TO_VIRTUAL (i
, raw_buffer
, virtual_buffer
);
941 fputs_filtered (reg_names
[i
], stdout
);
942 print_spaces_filtered (15 - strlen (reg_names
[i
]), stdout
);
944 val_print (REGISTER_VIRTUAL_TYPE (i
), virtual_buffer
, 0, stdout
, 0,
945 1, 0, Val_pretty_default
);
946 printf_filtered ("\n");
949 /* Function calls that pass into a new compilation unit must pass through a
950 small piece of code that does long format (`external' in HPPA parlance)
951 jumps. We figure out where the trampoline is going to end up, and return
952 the PC of the final destination. If we aren't in a trampoline, we just
955 For computed calls, we just extract the new PC from r22. */
958 skip_trampoline_code (pc
, name
)
963 static CORE_ADDR dyncall
= 0;
964 struct minimal_symbol
*msym
;
966 /* FIXME XXX - dyncall must be initialized whenever we get a new exec file */
970 msym
= lookup_minimal_symbol ("$$dyncall", NULL
);
972 dyncall
= SYMBOL_VALUE_ADDRESS (msym
);
978 return (CORE_ADDR
)(read_register (22) & ~0x3);
980 inst0
= read_memory_integer (pc
, 4);
981 inst1
= read_memory_integer (pc
+4, 4);
983 if ( (inst0
& 0xffe00000) == 0x20200000 /* ldil xxx, r1 */
984 && (inst1
& 0xffe0e002) == 0xe0202002) /* be,n yyy(sr4, r1) */
985 pc
= extract_21 (inst0
) + extract_17 (inst1
);
987 pc
= (CORE_ADDR
)NULL
;
992 /* Advance PC across any function entry prologue instructions
993 to reach some "real" code. */
995 /* skip (stw rp, -20(0,sp)); copy 4,1; copy sp, 4; stwm 1,framesize(sp)
996 for gcc, or (stw rp, -20(0,sp); stwm 1, framesize(sp) for hcc */
1006 status
= target_read_memory (pc
, buf
, 4);
1007 inst
= extract_unsigned_integer (buf
, 4);
1011 if (inst
== 0x6BC23FD9) /* stw rp,-20(sp) */
1013 if (read_memory_integer (pc
+ 4, 4) == 0x8040241) /* copy r4,r1 */
1015 else if ((read_memory_integer (pc
+ 4, 4) & ~MASK_14
) == 0x68810000) /* stw r1,(r4) */
1018 else if (read_memory_integer (pc
, 4) == 0x8040241) /* copy r4,r1 */
1020 else if ((read_memory_integer (pc
, 4) & ~MASK_14
) == 0x68810000) /* stw r1,(r4) */
1027 unwind_command (exp
, from_tty
)
1035 struct unwind_table_entry
*u
;
1038 /* If we have an expression, evaluate it and use it as the address. */
1040 if (exp
!= 0 && *exp
!= 0)
1041 address
= parse_and_eval_address (exp
);
1045 xxx
.u
= find_unwind_entry (address
);
1049 printf ("Can't find unwind table entry for PC 0x%x\n", address
);
1053 printf ("%08x\n%08X\n%08X\n%08X\n", xxx
.foo
[0], xxx
.foo
[1], xxx
.foo
[2],
1058 _initialize_hppa_tdep ()
1060 add_com ("unwind", class_obscure
, unwind_command
, "Print unwind info\n");
1062 (add_set_cmd ("use_unwind", class_obscure
, var_boolean
,
1063 (char *)&use_unwind
,
1064 "Set the usage of unwind info", &setlist
),