1999-04-16 09:35:26 +08:00
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/* Target dependent code for the Motorola 68000 series.
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2001-03-06 16:22:02 +08:00
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Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1999, 2000, 2001
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2000-03-25 01:55:13 +08:00
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Free Software Foundation, Inc.
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1999-04-16 09:35:26 +08:00
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1999-07-08 04:19:36 +08:00
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This file is part of GDB.
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1999-04-16 09:35:26 +08:00
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1999-07-08 04:19:36 +08:00
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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1999-04-16 09:35:26 +08:00
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1999-07-08 04:19:36 +08:00
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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1999-04-16 09:35:26 +08:00
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1999-07-08 04:19:36 +08:00
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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1999-04-16 09:35:26 +08:00
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#include "defs.h"
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#include "frame.h"
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#include "symtab.h"
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#include "gdbcore.h"
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#include "value.h"
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#include "gdb_string.h"
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1999-04-27 02:34:20 +08:00
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#include "inferior.h"
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2001-03-01 09:39:22 +08:00
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#include "regcache.h"
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1999-04-16 09:35:26 +08:00
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1999-07-08 04:19:36 +08:00
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* m68k-tdep.c (P_LINKL_FP, P_LINKW_FP): Macros renamed from P_LINK_L
and P_LINK_W.
(P_PEA_FP, P_MOVL_SP_FP): New macros.
(P_MOVL, P_LEAL, P_MOVML): Macros renamed from P_MOV_L, P_LEA_L and
P_MOVM_L.
(altos_skip_prologue, isi_skip_prologue): Use P_* macros, not octal
constants.
(delta68_in_sigtramp): New function.
(delta68_frame_args_address, delta68_frame_saved_pc): Ditto.
(m68k_skip_prologue): Use P_* macros, not hex constants.
(m68k_find_saved_regs): Do not expect a fixed sequence of register save
instructions, but accept them in any order; use P_* macros, not octal
or hex constants; recognize also `fmovemx to (fp + displacement)' and
`moveml to (fp + displacement)'.
* m68/tm-delta68.h (IN_SIGTRAMP): New macro.
(FRAME_SAVED_PC, FRAME_ARGS_ADDRESS): Ditto.
2000-03-24 19:12:11 +08:00
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#define P_LINKL_FP 0x480e
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#define P_LINKW_FP 0x4e56
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#define P_PEA_FP 0x4856
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#define P_MOVL_SP_FP 0x2c4f
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#define P_MOVL 0x207c
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#define P_JSR 0x4eb9
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#define P_BSR 0x61ff
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#define P_LEAL 0x43fb
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#define P_MOVML 0x48ef
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#define P_FMOVM 0xf237
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#define P_TRAP 0x4e40
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1999-05-05 22:45:51 +08:00
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/* The only reason this is here is the tm-altos.h reference below. It
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was moved back here from tm-m68k.h. FIXME? */
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extern CORE_ADDR
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2000-07-30 09:48:28 +08:00
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altos_skip_prologue (CORE_ADDR pc)
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1999-05-05 22:45:51 +08:00
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{
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register int op = read_memory_integer (pc, 2);
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* m68k-tdep.c (P_LINKL_FP, P_LINKW_FP): Macros renamed from P_LINK_L
and P_LINK_W.
(P_PEA_FP, P_MOVL_SP_FP): New macros.
(P_MOVL, P_LEAL, P_MOVML): Macros renamed from P_MOV_L, P_LEA_L and
P_MOVM_L.
(altos_skip_prologue, isi_skip_prologue): Use P_* macros, not octal
constants.
(delta68_in_sigtramp): New function.
(delta68_frame_args_address, delta68_frame_saved_pc): Ditto.
(m68k_skip_prologue): Use P_* macros, not hex constants.
(m68k_find_saved_regs): Do not expect a fixed sequence of register save
instructions, but accept them in any order; use P_* macros, not octal
or hex constants; recognize also `fmovemx to (fp + displacement)' and
`moveml to (fp + displacement)'.
* m68/tm-delta68.h (IN_SIGTRAMP): New macro.
(FRAME_SAVED_PC, FRAME_ARGS_ADDRESS): Ditto.
2000-03-24 19:12:11 +08:00
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if (op == P_LINKW_FP)
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1999-07-08 04:19:36 +08:00
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pc += 4; /* Skip link #word */
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* m68k-tdep.c (P_LINKL_FP, P_LINKW_FP): Macros renamed from P_LINK_L
and P_LINK_W.
(P_PEA_FP, P_MOVL_SP_FP): New macros.
(P_MOVL, P_LEAL, P_MOVML): Macros renamed from P_MOV_L, P_LEA_L and
P_MOVM_L.
(altos_skip_prologue, isi_skip_prologue): Use P_* macros, not octal
constants.
(delta68_in_sigtramp): New function.
(delta68_frame_args_address, delta68_frame_saved_pc): Ditto.
(m68k_skip_prologue): Use P_* macros, not hex constants.
(m68k_find_saved_regs): Do not expect a fixed sequence of register save
instructions, but accept them in any order; use P_* macros, not octal
or hex constants; recognize also `fmovemx to (fp + displacement)' and
`moveml to (fp + displacement)'.
* m68/tm-delta68.h (IN_SIGTRAMP): New macro.
(FRAME_SAVED_PC, FRAME_ARGS_ADDRESS): Ditto.
2000-03-24 19:12:11 +08:00
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else if (op == P_LINKL_FP)
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1999-07-08 04:19:36 +08:00
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pc += 6; /* Skip link #long */
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1999-05-05 22:45:51 +08:00
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/* Not sure why branches are here. */
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2001-04-18 05:20:49 +08:00
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/* From tm-altos.h */
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1999-05-05 22:45:51 +08:00
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else if (op == 0060000)
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1999-07-08 04:19:36 +08:00
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pc += 4; /* Skip bra #word */
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1999-05-05 22:45:51 +08:00
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else if (op == 00600377)
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1999-07-08 04:19:36 +08:00
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pc += 6; /* skip bra #long */
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1999-05-05 22:45:51 +08:00
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else if ((op & 0177400) == 0060000)
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1999-07-08 04:19:36 +08:00
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pc += 2; /* skip bra #char */
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1999-05-05 22:45:51 +08:00
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return pc;
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}
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/* The only reason this is here is the tm-isi.h reference below. It
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was moved back here from tm-m68k.h. FIXME? */
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2001-04-18 05:20:49 +08:00
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/* OBSOLETE extern CORE_ADDR */
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/* OBSOLETE isi_skip_prologue (CORE_ADDR pc) */
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/* OBSOLETE { */
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/* OBSOLETE register int op = read_memory_integer (pc, 2); */
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/* OBSOLETE if (op == P_LINKW_FP) */
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/* OBSOLETE pc += 4; *//* Skip link #word */
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/* OBSOLETE else if (op == P_LINKL_FP) */
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/* OBSOLETE pc += 6; *//* Skip link #long */
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/* OBSOLETE *//* Not sure why branches are here. */
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/* OBSOLETE *//* From tm-isi.h, tm-altos.h */
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/* OBSOLETE else if (op == 0060000) */
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/* OBSOLETE pc += 4; *//* Skip bra #word */
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/* OBSOLETE else if (op == 00600377) */
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/* OBSOLETE pc += 6; *//* skip bra #long */
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/* OBSOLETE else if ((op & 0177400) == 0060000) */
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/* OBSOLETE pc += 2; *//* skip bra #char */
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/* OBSOLETE return pc; */
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/* OBSOLETE } */
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1999-05-05 22:45:51 +08:00
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* m68k-tdep.c (P_LINKL_FP, P_LINKW_FP): Macros renamed from P_LINK_L
and P_LINK_W.
(P_PEA_FP, P_MOVL_SP_FP): New macros.
(P_MOVL, P_LEAL, P_MOVML): Macros renamed from P_MOV_L, P_LEA_L and
P_MOVM_L.
(altos_skip_prologue, isi_skip_prologue): Use P_* macros, not octal
constants.
(delta68_in_sigtramp): New function.
(delta68_frame_args_address, delta68_frame_saved_pc): Ditto.
(m68k_skip_prologue): Use P_* macros, not hex constants.
(m68k_find_saved_regs): Do not expect a fixed sequence of register save
instructions, but accept them in any order; use P_* macros, not octal
or hex constants; recognize also `fmovemx to (fp + displacement)' and
`moveml to (fp + displacement)'.
* m68/tm-delta68.h (IN_SIGTRAMP): New macro.
(FRAME_SAVED_PC, FRAME_ARGS_ADDRESS): Ditto.
2000-03-24 19:12:11 +08:00
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int
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2000-07-30 09:48:28 +08:00
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delta68_in_sigtramp (CORE_ADDR pc, char *name)
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* m68k-tdep.c (P_LINKL_FP, P_LINKW_FP): Macros renamed from P_LINK_L
and P_LINK_W.
(P_PEA_FP, P_MOVL_SP_FP): New macros.
(P_MOVL, P_LEAL, P_MOVML): Macros renamed from P_MOV_L, P_LEA_L and
P_MOVM_L.
(altos_skip_prologue, isi_skip_prologue): Use P_* macros, not octal
constants.
(delta68_in_sigtramp): New function.
(delta68_frame_args_address, delta68_frame_saved_pc): Ditto.
(m68k_skip_prologue): Use P_* macros, not hex constants.
(m68k_find_saved_regs): Do not expect a fixed sequence of register save
instructions, but accept them in any order; use P_* macros, not octal
or hex constants; recognize also `fmovemx to (fp + displacement)' and
`moveml to (fp + displacement)'.
* m68/tm-delta68.h (IN_SIGTRAMP): New macro.
(FRAME_SAVED_PC, FRAME_ARGS_ADDRESS): Ditto.
2000-03-24 19:12:11 +08:00
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{
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2000-04-28 13:50:19 +08:00
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if (name != NULL)
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return strcmp (name, "_sigcode") == 0;
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else
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return 0;
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* m68k-tdep.c (P_LINKL_FP, P_LINKW_FP): Macros renamed from P_LINK_L
and P_LINK_W.
(P_PEA_FP, P_MOVL_SP_FP): New macros.
(P_MOVL, P_LEAL, P_MOVML): Macros renamed from P_MOV_L, P_LEA_L and
P_MOVM_L.
(altos_skip_prologue, isi_skip_prologue): Use P_* macros, not octal
constants.
(delta68_in_sigtramp): New function.
(delta68_frame_args_address, delta68_frame_saved_pc): Ditto.
(m68k_skip_prologue): Use P_* macros, not hex constants.
(m68k_find_saved_regs): Do not expect a fixed sequence of register save
instructions, but accept them in any order; use P_* macros, not octal
or hex constants; recognize also `fmovemx to (fp + displacement)' and
`moveml to (fp + displacement)'.
* m68/tm-delta68.h (IN_SIGTRAMP): New macro.
(FRAME_SAVED_PC, FRAME_ARGS_ADDRESS): Ditto.
2000-03-24 19:12:11 +08:00
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}
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CORE_ADDR
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2000-07-30 09:48:28 +08:00
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delta68_frame_args_address (struct frame_info *frame_info)
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* m68k-tdep.c (P_LINKL_FP, P_LINKW_FP): Macros renamed from P_LINK_L
and P_LINK_W.
(P_PEA_FP, P_MOVL_SP_FP): New macros.
(P_MOVL, P_LEAL, P_MOVML): Macros renamed from P_MOV_L, P_LEA_L and
P_MOVM_L.
(altos_skip_prologue, isi_skip_prologue): Use P_* macros, not octal
constants.
(delta68_in_sigtramp): New function.
(delta68_frame_args_address, delta68_frame_saved_pc): Ditto.
(m68k_skip_prologue): Use P_* macros, not hex constants.
(m68k_find_saved_regs): Do not expect a fixed sequence of register save
instructions, but accept them in any order; use P_* macros, not octal
or hex constants; recognize also `fmovemx to (fp + displacement)' and
`moveml to (fp + displacement)'.
* m68/tm-delta68.h (IN_SIGTRAMP): New macro.
(FRAME_SAVED_PC, FRAME_ARGS_ADDRESS): Ditto.
2000-03-24 19:12:11 +08:00
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{
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/* we assume here that the only frameless functions are the system calls
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or other functions who do not put anything on the stack. */
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if (frame_info->signal_handler_caller)
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return frame_info->frame + 12;
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else if (frameless_look_for_prologue (frame_info))
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{
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/* Check for an interrupted system call */
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if (frame_info->next && frame_info->next->signal_handler_caller)
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return frame_info->next->frame + 16;
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else
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return frame_info->frame + 4;
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}
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else
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return frame_info->frame;
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}
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CORE_ADDR
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2000-07-30 09:48:28 +08:00
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delta68_frame_saved_pc (struct frame_info *frame_info)
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* m68k-tdep.c (P_LINKL_FP, P_LINKW_FP): Macros renamed from P_LINK_L
and P_LINK_W.
(P_PEA_FP, P_MOVL_SP_FP): New macros.
(P_MOVL, P_LEAL, P_MOVML): Macros renamed from P_MOV_L, P_LEA_L and
P_MOVM_L.
(altos_skip_prologue, isi_skip_prologue): Use P_* macros, not octal
constants.
(delta68_in_sigtramp): New function.
(delta68_frame_args_address, delta68_frame_saved_pc): Ditto.
(m68k_skip_prologue): Use P_* macros, not hex constants.
(m68k_find_saved_regs): Do not expect a fixed sequence of register save
instructions, but accept them in any order; use P_* macros, not octal
or hex constants; recognize also `fmovemx to (fp + displacement)' and
`moveml to (fp + displacement)'.
* m68/tm-delta68.h (IN_SIGTRAMP): New macro.
(FRAME_SAVED_PC, FRAME_ARGS_ADDRESS): Ditto.
2000-03-24 19:12:11 +08:00
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{
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return read_memory_integer (delta68_frame_args_address (frame_info) + 4, 4);
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}
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1999-05-26 02:09:09 +08:00
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/* Return number of args passed to a frame.
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Can return -1, meaning no way to tell. */
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int
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2000-07-30 09:48:28 +08:00
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isi_frame_num_args (struct frame_info *fi)
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1999-05-26 02:09:09 +08:00
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{
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int val;
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CORE_ADDR pc = FRAME_SAVED_PC (fi);
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int insn = 0177777 & read_memory_integer (pc, 2);
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val = 0;
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1999-07-08 04:19:36 +08:00
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if (insn == 0047757 || insn == 0157374) /* lea W(sp),sp or addaw #W,sp */
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1999-05-26 02:09:09 +08:00
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val = read_memory_integer (pc + 2, 2);
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1999-07-08 04:19:36 +08:00
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else if ((insn & 0170777) == 0050217 /* addql #N, sp */
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|| (insn & 0170777) == 0050117) /* addqw */
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1999-05-26 02:09:09 +08:00
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{
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val = (insn >> 9) & 7;
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if (val == 0)
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val = 8;
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}
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1999-07-08 04:19:36 +08:00
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else if (insn == 0157774) /* addal #WW, sp */
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1999-05-26 02:09:09 +08:00
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val = read_memory_integer (pc + 2, 4);
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val >>= 2;
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return val;
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}
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int
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2000-07-30 09:48:28 +08:00
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delta68_frame_num_args (struct frame_info *fi)
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1999-05-26 02:09:09 +08:00
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{
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int val;
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CORE_ADDR pc = FRAME_SAVED_PC (fi);
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int insn = 0177777 & read_memory_integer (pc, 2);
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val = 0;
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1999-07-08 04:19:36 +08:00
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if (insn == 0047757 || insn == 0157374) /* lea W(sp),sp or addaw #W,sp */
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1999-05-26 02:09:09 +08:00
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val = read_memory_integer (pc + 2, 2);
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1999-07-08 04:19:36 +08:00
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else if ((insn & 0170777) == 0050217 /* addql #N, sp */
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|| (insn & 0170777) == 0050117) /* addqw */
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1999-05-26 02:09:09 +08:00
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{
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val = (insn >> 9) & 7;
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if (val == 0)
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val = 8;
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}
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1999-07-08 04:19:36 +08:00
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else if (insn == 0157774) /* addal #WW, sp */
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1999-05-26 02:09:09 +08:00
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val = read_memory_integer (pc + 2, 4);
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val >>= 2;
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return val;
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}
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int
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2000-07-30 09:48:28 +08:00
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news_frame_num_args (struct frame_info *fi)
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1999-05-26 02:09:09 +08:00
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{
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int val;
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CORE_ADDR pc = FRAME_SAVED_PC (fi);
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int insn = 0177777 & read_memory_integer (pc, 2);
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val = 0;
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1999-07-08 04:19:36 +08:00
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|
|
|
if (insn == 0047757 || insn == 0157374) /* lea W(sp),sp or addaw #W,sp */
|
1999-05-26 02:09:09 +08:00
|
|
|
|
val = read_memory_integer (pc + 2, 2);
|
1999-07-08 04:19:36 +08:00
|
|
|
|
else if ((insn & 0170777) == 0050217 /* addql #N, sp */
|
|
|
|
|
|| (insn & 0170777) == 0050117) /* addqw */
|
1999-05-26 02:09:09 +08:00
|
|
|
|
{
|
|
|
|
|
val = (insn >> 9) & 7;
|
|
|
|
|
if (val == 0)
|
|
|
|
|
val = 8;
|
|
|
|
|
}
|
1999-07-08 04:19:36 +08:00
|
|
|
|
else if (insn == 0157774) /* addal #WW, sp */
|
1999-05-26 02:09:09 +08:00
|
|
|
|
val = read_memory_integer (pc + 2, 4);
|
|
|
|
|
val >>= 2;
|
|
|
|
|
return val;
|
|
|
|
|
}
|
1999-05-05 22:45:51 +08:00
|
|
|
|
|
1999-04-16 09:35:26 +08:00
|
|
|
|
/* Push an empty stack frame, to record the current PC, etc. */
|
|
|
|
|
|
|
|
|
|
void
|
2000-07-30 09:48:28 +08:00
|
|
|
|
m68k_push_dummy_frame (void)
|
1999-04-16 09:35:26 +08:00
|
|
|
|
{
|
|
|
|
|
register CORE_ADDR sp = read_register (SP_REGNUM);
|
|
|
|
|
register int regnum;
|
|
|
|
|
char raw_buffer[12];
|
|
|
|
|
|
|
|
|
|
sp = push_word (sp, read_register (PC_REGNUM));
|
|
|
|
|
sp = push_word (sp, read_register (FP_REGNUM));
|
|
|
|
|
write_register (FP_REGNUM, sp);
|
|
|
|
|
|
|
|
|
|
/* Always save the floating-point registers, whether they exist on
|
|
|
|
|
this target or not. */
|
|
|
|
|
for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--)
|
|
|
|
|
{
|
|
|
|
|
read_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 12);
|
|
|
|
|
sp = push_bytes (sp, raw_buffer, 12);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for (regnum = FP_REGNUM - 1; regnum >= 0; regnum--)
|
|
|
|
|
{
|
|
|
|
|
sp = push_word (sp, read_register (regnum));
|
|
|
|
|
}
|
|
|
|
|
sp = push_word (sp, read_register (PS_REGNUM));
|
|
|
|
|
write_register (SP_REGNUM, sp);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Discard from the stack the innermost frame,
|
|
|
|
|
restoring all saved registers. */
|
|
|
|
|
|
|
|
|
|
void
|
2000-07-30 09:48:28 +08:00
|
|
|
|
m68k_pop_frame (void)
|
1999-04-16 09:35:26 +08:00
|
|
|
|
{
|
|
|
|
|
register struct frame_info *frame = get_current_frame ();
|
|
|
|
|
register CORE_ADDR fp;
|
|
|
|
|
register int regnum;
|
|
|
|
|
struct frame_saved_regs fsr;
|
|
|
|
|
char raw_buffer[12];
|
|
|
|
|
|
|
|
|
|
fp = FRAME_FP (frame);
|
|
|
|
|
get_frame_saved_regs (frame, &fsr);
|
1999-07-08 04:19:36 +08:00
|
|
|
|
for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--)
|
1999-04-16 09:35:26 +08:00
|
|
|
|
{
|
|
|
|
|
if (fsr.regs[regnum])
|
|
|
|
|
{
|
|
|
|
|
read_memory (fsr.regs[regnum], raw_buffer, 12);
|
|
|
|
|
write_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 12);
|
|
|
|
|
}
|
|
|
|
|
}
|
1999-07-08 04:19:36 +08:00
|
|
|
|
for (regnum = FP_REGNUM - 1; regnum >= 0; regnum--)
|
1999-04-16 09:35:26 +08:00
|
|
|
|
{
|
|
|
|
|
if (fsr.regs[regnum])
|
|
|
|
|
{
|
|
|
|
|
write_register (regnum, read_memory_integer (fsr.regs[regnum], 4));
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
if (fsr.regs[PS_REGNUM])
|
|
|
|
|
{
|
|
|
|
|
write_register (PS_REGNUM, read_memory_integer (fsr.regs[PS_REGNUM], 4));
|
|
|
|
|
}
|
|
|
|
|
write_register (FP_REGNUM, read_memory_integer (fp, 4));
|
|
|
|
|
write_register (PC_REGNUM, read_memory_integer (fp + 4, 4));
|
|
|
|
|
write_register (SP_REGNUM, fp + 8);
|
|
|
|
|
flush_cached_frames ();
|
|
|
|
|
}
|
|
|
|
|
|
1999-07-08 04:19:36 +08:00
|
|
|
|
|
1999-04-16 09:35:26 +08:00
|
|
|
|
/* Given an ip value corresponding to the start of a function,
|
|
|
|
|
return the ip of the first instruction after the function
|
|
|
|
|
prologue. This is the generic m68k support. Machines which
|
|
|
|
|
require something different can override the SKIP_PROLOGUE
|
|
|
|
|
macro to point elsewhere.
|
|
|
|
|
|
|
|
|
|
Some instructions which typically may appear in a function
|
|
|
|
|
prologue include:
|
|
|
|
|
|
|
|
|
|
A link instruction, word form:
|
|
|
|
|
|
1999-07-08 04:19:36 +08:00
|
|
|
|
link.w %a6,&0 4e56 XXXX
|
1999-04-16 09:35:26 +08:00
|
|
|
|
|
|
|
|
|
A link instruction, long form:
|
|
|
|
|
|
1999-07-08 04:19:36 +08:00
|
|
|
|
link.l %fp,&F%1 480e XXXX XXXX
|
1999-04-16 09:35:26 +08:00
|
|
|
|
|
|
|
|
|
A movm instruction to preserve integer regs:
|
|
|
|
|
|
1999-07-08 04:19:36 +08:00
|
|
|
|
movm.l &M%1,(4,%sp) 48ef XXXX XXXX
|
1999-04-16 09:35:26 +08:00
|
|
|
|
|
|
|
|
|
A fmovm instruction to preserve float regs:
|
|
|
|
|
|
1999-07-08 04:19:36 +08:00
|
|
|
|
fmovm &FPM%1,(FPO%1,%sp) f237 XXXX XXXX XXXX XXXX
|
1999-04-16 09:35:26 +08:00
|
|
|
|
|
|
|
|
|
Some profiling setup code (FIXME, not recognized yet):
|
|
|
|
|
|
1999-07-08 04:19:36 +08:00
|
|
|
|
lea.l (.L3,%pc),%a1 43fb XXXX XXXX XXXX
|
|
|
|
|
bsr _mcount 61ff XXXX XXXX
|
1999-04-16 09:35:26 +08:00
|
|
|
|
|
1999-07-08 04:19:36 +08:00
|
|
|
|
*/
|
1999-04-16 09:35:26 +08:00
|
|
|
|
|
|
|
|
|
CORE_ADDR
|
2000-07-30 09:48:28 +08:00
|
|
|
|
m68k_skip_prologue (CORE_ADDR ip)
|
1999-04-16 09:35:26 +08:00
|
|
|
|
{
|
|
|
|
|
register CORE_ADDR limit;
|
|
|
|
|
struct symtab_and_line sal;
|
|
|
|
|
register int op;
|
|
|
|
|
|
|
|
|
|
/* Find out if there is a known limit for the extent of the prologue.
|
|
|
|
|
If so, ensure we don't go past it. If not, assume "infinity". */
|
|
|
|
|
|
|
|
|
|
sal = find_pc_line (ip, 0);
|
1999-07-08 04:19:36 +08:00
|
|
|
|
limit = (sal.end) ? sal.end : (CORE_ADDR) ~ 0;
|
1999-04-16 09:35:26 +08:00
|
|
|
|
|
|
|
|
|
while (ip < limit)
|
|
|
|
|
{
|
|
|
|
|
op = read_memory_integer (ip, 2);
|
|
|
|
|
op &= 0xFFFF;
|
1999-07-08 04:19:36 +08:00
|
|
|
|
|
* m68k-tdep.c (P_LINKL_FP, P_LINKW_FP): Macros renamed from P_LINK_L
and P_LINK_W.
(P_PEA_FP, P_MOVL_SP_FP): New macros.
(P_MOVL, P_LEAL, P_MOVML): Macros renamed from P_MOV_L, P_LEA_L and
P_MOVM_L.
(altos_skip_prologue, isi_skip_prologue): Use P_* macros, not octal
constants.
(delta68_in_sigtramp): New function.
(delta68_frame_args_address, delta68_frame_saved_pc): Ditto.
(m68k_skip_prologue): Use P_* macros, not hex constants.
(m68k_find_saved_regs): Do not expect a fixed sequence of register save
instructions, but accept them in any order; use P_* macros, not octal
or hex constants; recognize also `fmovemx to (fp + displacement)' and
`moveml to (fp + displacement)'.
* m68/tm-delta68.h (IN_SIGTRAMP): New macro.
(FRAME_SAVED_PC, FRAME_ARGS_ADDRESS): Ditto.
2000-03-24 19:12:11 +08:00
|
|
|
|
if (op == P_LINKW_FP)
|
|
|
|
|
ip += 4; /* Skip link.w */
|
|
|
|
|
else if (op == P_PEA_FP)
|
1999-07-08 04:19:36 +08:00
|
|
|
|
ip += 2; /* Skip pea %fp */
|
* m68k-tdep.c (P_LINKL_FP, P_LINKW_FP): Macros renamed from P_LINK_L
and P_LINK_W.
(P_PEA_FP, P_MOVL_SP_FP): New macros.
(P_MOVL, P_LEAL, P_MOVML): Macros renamed from P_MOV_L, P_LEA_L and
P_MOVM_L.
(altos_skip_prologue, isi_skip_prologue): Use P_* macros, not octal
constants.
(delta68_in_sigtramp): New function.
(delta68_frame_args_address, delta68_frame_saved_pc): Ditto.
(m68k_skip_prologue): Use P_* macros, not hex constants.
(m68k_find_saved_regs): Do not expect a fixed sequence of register save
instructions, but accept them in any order; use P_* macros, not octal
or hex constants; recognize also `fmovemx to (fp + displacement)' and
`moveml to (fp + displacement)'.
* m68/tm-delta68.h (IN_SIGTRAMP): New macro.
(FRAME_SAVED_PC, FRAME_ARGS_ADDRESS): Ditto.
2000-03-24 19:12:11 +08:00
|
|
|
|
else if (op == P_MOVL_SP_FP)
|
1999-07-08 04:19:36 +08:00
|
|
|
|
ip += 2; /* Skip move.l %sp, %fp */
|
* m68k-tdep.c (P_LINKL_FP, P_LINKW_FP): Macros renamed from P_LINK_L
and P_LINK_W.
(P_PEA_FP, P_MOVL_SP_FP): New macros.
(P_MOVL, P_LEAL, P_MOVML): Macros renamed from P_MOV_L, P_LEA_L and
P_MOVM_L.
(altos_skip_prologue, isi_skip_prologue): Use P_* macros, not octal
constants.
(delta68_in_sigtramp): New function.
(delta68_frame_args_address, delta68_frame_saved_pc): Ditto.
(m68k_skip_prologue): Use P_* macros, not hex constants.
(m68k_find_saved_regs): Do not expect a fixed sequence of register save
instructions, but accept them in any order; use P_* macros, not octal
or hex constants; recognize also `fmovemx to (fp + displacement)' and
`moveml to (fp + displacement)'.
* m68/tm-delta68.h (IN_SIGTRAMP): New macro.
(FRAME_SAVED_PC, FRAME_ARGS_ADDRESS): Ditto.
2000-03-24 19:12:11 +08:00
|
|
|
|
else if (op == P_LINKL_FP)
|
|
|
|
|
ip += 6; /* Skip link.l */
|
|
|
|
|
else if (op == P_MOVML)
|
|
|
|
|
ip += 6; /* Skip movm.l */
|
1999-04-16 09:35:26 +08:00
|
|
|
|
else if (op == P_FMOVM)
|
* m68k-tdep.c (P_LINKL_FP, P_LINKW_FP): Macros renamed from P_LINK_L
and P_LINK_W.
(P_PEA_FP, P_MOVL_SP_FP): New macros.
(P_MOVL, P_LEAL, P_MOVML): Macros renamed from P_MOV_L, P_LEA_L and
P_MOVM_L.
(altos_skip_prologue, isi_skip_prologue): Use P_* macros, not octal
constants.
(delta68_in_sigtramp): New function.
(delta68_frame_args_address, delta68_frame_saved_pc): Ditto.
(m68k_skip_prologue): Use P_* macros, not hex constants.
(m68k_find_saved_regs): Do not expect a fixed sequence of register save
instructions, but accept them in any order; use P_* macros, not octal
or hex constants; recognize also `fmovemx to (fp + displacement)' and
`moveml to (fp + displacement)'.
* m68/tm-delta68.h (IN_SIGTRAMP): New macro.
(FRAME_SAVED_PC, FRAME_ARGS_ADDRESS): Ditto.
2000-03-24 19:12:11 +08:00
|
|
|
|
ip += 10; /* Skip fmovm */
|
1999-04-16 09:35:26 +08:00
|
|
|
|
else
|
* m68k-tdep.c (P_LINKL_FP, P_LINKW_FP): Macros renamed from P_LINK_L
and P_LINK_W.
(P_PEA_FP, P_MOVL_SP_FP): New macros.
(P_MOVL, P_LEAL, P_MOVML): Macros renamed from P_MOV_L, P_LEA_L and
P_MOVM_L.
(altos_skip_prologue, isi_skip_prologue): Use P_* macros, not octal
constants.
(delta68_in_sigtramp): New function.
(delta68_frame_args_address, delta68_frame_saved_pc): Ditto.
(m68k_skip_prologue): Use P_* macros, not hex constants.
(m68k_find_saved_regs): Do not expect a fixed sequence of register save
instructions, but accept them in any order; use P_* macros, not octal
or hex constants; recognize also `fmovemx to (fp + displacement)' and
`moveml to (fp + displacement)'.
* m68/tm-delta68.h (IN_SIGTRAMP): New macro.
(FRAME_SAVED_PC, FRAME_ARGS_ADDRESS): Ditto.
2000-03-24 19:12:11 +08:00
|
|
|
|
break; /* Found unknown code, bail out. */
|
1999-04-16 09:35:26 +08:00
|
|
|
|
}
|
|
|
|
|
return (ip);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void
|
2000-07-30 09:48:28 +08:00
|
|
|
|
m68k_find_saved_regs (struct frame_info *frame_info,
|
|
|
|
|
struct frame_saved_regs *saved_regs)
|
1999-04-16 09:35:26 +08:00
|
|
|
|
{
|
1999-07-08 04:19:36 +08:00
|
|
|
|
register int regnum;
|
|
|
|
|
register int regmask;
|
|
|
|
|
register CORE_ADDR next_addr;
|
1999-04-16 09:35:26 +08:00
|
|
|
|
register CORE_ADDR pc;
|
|
|
|
|
|
|
|
|
|
/* First possible address for a pc in a call dummy for this frame. */
|
|
|
|
|
CORE_ADDR possible_call_dummy_start =
|
1999-07-08 04:19:36 +08:00
|
|
|
|
(frame_info)->frame - CALL_DUMMY_LENGTH - FP_REGNUM * 4 - 4 - 8 * 12;
|
1999-04-16 09:35:26 +08:00
|
|
|
|
|
|
|
|
|
int nextinsn;
|
|
|
|
|
memset (saved_regs, 0, sizeof (*saved_regs));
|
|
|
|
|
if ((frame_info)->pc >= possible_call_dummy_start
|
|
|
|
|
&& (frame_info)->pc <= (frame_info)->frame)
|
|
|
|
|
{
|
|
|
|
|
|
|
|
|
|
/* It is a call dummy. We could just stop now, since we know
|
1999-07-08 04:19:36 +08:00
|
|
|
|
what the call dummy saves and where. But this code proceeds
|
|
|
|
|
to parse the "prologue" which is part of the call dummy.
|
|
|
|
|
This is needlessly complex and confusing. FIXME. */
|
1999-04-16 09:35:26 +08:00
|
|
|
|
|
|
|
|
|
next_addr = (frame_info)->frame;
|
|
|
|
|
pc = possible_call_dummy_start;
|
|
|
|
|
}
|
1999-07-08 04:19:36 +08:00
|
|
|
|
else
|
1999-04-16 09:35:26 +08:00
|
|
|
|
{
|
1999-07-08 04:19:36 +08:00
|
|
|
|
pc = get_pc_function_start ((frame_info)->pc);
|
1999-04-16 09:35:26 +08:00
|
|
|
|
|
* m68k-tdep.c (P_LINKL_FP, P_LINKW_FP): Macros renamed from P_LINK_L
and P_LINK_W.
(P_PEA_FP, P_MOVL_SP_FP): New macros.
(P_MOVL, P_LEAL, P_MOVML): Macros renamed from P_MOV_L, P_LEA_L and
P_MOVM_L.
(altos_skip_prologue, isi_skip_prologue): Use P_* macros, not octal
constants.
(delta68_in_sigtramp): New function.
(delta68_frame_args_address, delta68_frame_saved_pc): Ditto.
(m68k_skip_prologue): Use P_* macros, not hex constants.
(m68k_find_saved_regs): Do not expect a fixed sequence of register save
instructions, but accept them in any order; use P_* macros, not octal
or hex constants; recognize also `fmovemx to (fp + displacement)' and
`moveml to (fp + displacement)'.
* m68/tm-delta68.h (IN_SIGTRAMP): New macro.
(FRAME_SAVED_PC, FRAME_ARGS_ADDRESS): Ditto.
2000-03-24 19:12:11 +08:00
|
|
|
|
nextinsn = read_memory_integer (pc, 2);
|
|
|
|
|
if (P_PEA_FP == nextinsn
|
|
|
|
|
&& P_MOVL_SP_FP == read_memory_integer (pc + 2, 2))
|
1999-04-16 09:35:26 +08:00
|
|
|
|
{
|
* m68k-tdep.c (P_LINKL_FP, P_LINKW_FP): Macros renamed from P_LINK_L
and P_LINK_W.
(P_PEA_FP, P_MOVL_SP_FP): New macros.
(P_MOVL, P_LEAL, P_MOVML): Macros renamed from P_MOV_L, P_LEA_L and
P_MOVM_L.
(altos_skip_prologue, isi_skip_prologue): Use P_* macros, not octal
constants.
(delta68_in_sigtramp): New function.
(delta68_frame_args_address, delta68_frame_saved_pc): Ditto.
(m68k_skip_prologue): Use P_* macros, not hex constants.
(m68k_find_saved_regs): Do not expect a fixed sequence of register save
instructions, but accept them in any order; use P_* macros, not octal
or hex constants; recognize also `fmovemx to (fp + displacement)' and
`moveml to (fp + displacement)'.
* m68/tm-delta68.h (IN_SIGTRAMP): New macro.
(FRAME_SAVED_PC, FRAME_ARGS_ADDRESS): Ditto.
2000-03-24 19:12:11 +08:00
|
|
|
|
/* pea %fp
|
1999-07-08 04:19:36 +08:00
|
|
|
|
move.l %sp, %fp */
|
1999-04-16 09:35:26 +08:00
|
|
|
|
next_addr = frame_info->frame;
|
* m68k-tdep.c (P_LINKL_FP, P_LINKW_FP): Macros renamed from P_LINK_L
and P_LINK_W.
(P_PEA_FP, P_MOVL_SP_FP): New macros.
(P_MOVL, P_LEAL, P_MOVML): Macros renamed from P_MOV_L, P_LEA_L and
P_MOVM_L.
(altos_skip_prologue, isi_skip_prologue): Use P_* macros, not octal
constants.
(delta68_in_sigtramp): New function.
(delta68_frame_args_address, delta68_frame_saved_pc): Ditto.
(m68k_skip_prologue): Use P_* macros, not hex constants.
(m68k_find_saved_regs): Do not expect a fixed sequence of register save
instructions, but accept them in any order; use P_* macros, not octal
or hex constants; recognize also `fmovemx to (fp + displacement)' and
`moveml to (fp + displacement)'.
* m68/tm-delta68.h (IN_SIGTRAMP): New macro.
(FRAME_SAVED_PC, FRAME_ARGS_ADDRESS): Ditto.
2000-03-24 19:12:11 +08:00
|
|
|
|
pc += 4;
|
1999-04-16 09:35:26 +08:00
|
|
|
|
}
|
* m68k-tdep.c (P_LINKL_FP, P_LINKW_FP): Macros renamed from P_LINK_L
and P_LINK_W.
(P_PEA_FP, P_MOVL_SP_FP): New macros.
(P_MOVL, P_LEAL, P_MOVML): Macros renamed from P_MOV_L, P_LEA_L and
P_MOVM_L.
(altos_skip_prologue, isi_skip_prologue): Use P_* macros, not octal
constants.
(delta68_in_sigtramp): New function.
(delta68_frame_args_address, delta68_frame_saved_pc): Ditto.
(m68k_skip_prologue): Use P_* macros, not hex constants.
(m68k_find_saved_regs): Do not expect a fixed sequence of register save
instructions, but accept them in any order; use P_* macros, not octal
or hex constants; recognize also `fmovemx to (fp + displacement)' and
`moveml to (fp + displacement)'.
* m68/tm-delta68.h (IN_SIGTRAMP): New macro.
(FRAME_SAVED_PC, FRAME_ARGS_ADDRESS): Ditto.
2000-03-24 19:12:11 +08:00
|
|
|
|
else if (P_LINKL_FP == nextinsn)
|
1999-04-16 09:35:26 +08:00
|
|
|
|
/* link.l %fp */
|
|
|
|
|
/* Find the address above the saved
|
|
|
|
|
regs using the amount of storage from the link instruction. */
|
* m68k-tdep.c (P_LINKL_FP, P_LINKW_FP): Macros renamed from P_LINK_L
and P_LINK_W.
(P_PEA_FP, P_MOVL_SP_FP): New macros.
(P_MOVL, P_LEAL, P_MOVML): Macros renamed from P_MOV_L, P_LEA_L and
P_MOVM_L.
(altos_skip_prologue, isi_skip_prologue): Use P_* macros, not octal
constants.
(delta68_in_sigtramp): New function.
(delta68_frame_args_address, delta68_frame_saved_pc): Ditto.
(m68k_skip_prologue): Use P_* macros, not hex constants.
(m68k_find_saved_regs): Do not expect a fixed sequence of register save
instructions, but accept them in any order; use P_* macros, not octal
or hex constants; recognize also `fmovemx to (fp + displacement)' and
`moveml to (fp + displacement)'.
* m68/tm-delta68.h (IN_SIGTRAMP): New macro.
(FRAME_SAVED_PC, FRAME_ARGS_ADDRESS): Ditto.
2000-03-24 19:12:11 +08:00
|
|
|
|
{
|
|
|
|
|
next_addr = (frame_info)->frame + read_memory_integer (pc + 2, 4);
|
|
|
|
|
pc += 6;
|
|
|
|
|
}
|
|
|
|
|
else if (P_LINKW_FP == nextinsn)
|
1999-04-16 09:35:26 +08:00
|
|
|
|
/* link.w %fp */
|
|
|
|
|
/* Find the address above the saved
|
|
|
|
|
regs using the amount of storage from the link instruction. */
|
* m68k-tdep.c (P_LINKL_FP, P_LINKW_FP): Macros renamed from P_LINK_L
and P_LINK_W.
(P_PEA_FP, P_MOVL_SP_FP): New macros.
(P_MOVL, P_LEAL, P_MOVML): Macros renamed from P_MOV_L, P_LEA_L and
P_MOVM_L.
(altos_skip_prologue, isi_skip_prologue): Use P_* macros, not octal
constants.
(delta68_in_sigtramp): New function.
(delta68_frame_args_address, delta68_frame_saved_pc): Ditto.
(m68k_skip_prologue): Use P_* macros, not hex constants.
(m68k_find_saved_regs): Do not expect a fixed sequence of register save
instructions, but accept them in any order; use P_* macros, not octal
or hex constants; recognize also `fmovemx to (fp + displacement)' and
`moveml to (fp + displacement)'.
* m68/tm-delta68.h (IN_SIGTRAMP): New macro.
(FRAME_SAVED_PC, FRAME_ARGS_ADDRESS): Ditto.
2000-03-24 19:12:11 +08:00
|
|
|
|
{
|
|
|
|
|
next_addr = (frame_info)->frame + read_memory_integer (pc + 2, 2);
|
|
|
|
|
pc += 4;
|
|
|
|
|
}
|
1999-07-08 04:19:36 +08:00
|
|
|
|
else
|
|
|
|
|
goto lose;
|
|
|
|
|
|
|
|
|
|
/* If have an addal #-n, sp next, adjust next_addr. */
|
|
|
|
|
if ((0177777 & read_memory_integer (pc, 2)) == 0157774)
|
|
|
|
|
next_addr += read_memory_integer (pc += 2, 4), pc += 4;
|
|
|
|
|
}
|
|
|
|
|
|
* m68k-tdep.c (P_LINKL_FP, P_LINKW_FP): Macros renamed from P_LINK_L
and P_LINK_W.
(P_PEA_FP, P_MOVL_SP_FP): New macros.
(P_MOVL, P_LEAL, P_MOVML): Macros renamed from P_MOV_L, P_LEA_L and
P_MOVM_L.
(altos_skip_prologue, isi_skip_prologue): Use P_* macros, not octal
constants.
(delta68_in_sigtramp): New function.
(delta68_frame_args_address, delta68_frame_saved_pc): Ditto.
(m68k_skip_prologue): Use P_* macros, not hex constants.
(m68k_find_saved_regs): Do not expect a fixed sequence of register save
instructions, but accept them in any order; use P_* macros, not octal
or hex constants; recognize also `fmovemx to (fp + displacement)' and
`moveml to (fp + displacement)'.
* m68/tm-delta68.h (IN_SIGTRAMP): New macro.
(FRAME_SAVED_PC, FRAME_ARGS_ADDRESS): Ditto.
2000-03-24 19:12:11 +08:00
|
|
|
|
for ( ; ; )
|
1999-07-08 04:19:36 +08:00
|
|
|
|
{
|
* m68k-tdep.c (P_LINKL_FP, P_LINKW_FP): Macros renamed from P_LINK_L
and P_LINK_W.
(P_PEA_FP, P_MOVL_SP_FP): New macros.
(P_MOVL, P_LEAL, P_MOVML): Macros renamed from P_MOV_L, P_LEA_L and
P_MOVM_L.
(altos_skip_prologue, isi_skip_prologue): Use P_* macros, not octal
constants.
(delta68_in_sigtramp): New function.
(delta68_frame_args_address, delta68_frame_saved_pc): Ditto.
(m68k_skip_prologue): Use P_* macros, not hex constants.
(m68k_find_saved_regs): Do not expect a fixed sequence of register save
instructions, but accept them in any order; use P_* macros, not octal
or hex constants; recognize also `fmovemx to (fp + displacement)' and
`moveml to (fp + displacement)'.
* m68/tm-delta68.h (IN_SIGTRAMP): New macro.
(FRAME_SAVED_PC, FRAME_ARGS_ADDRESS): Ditto.
2000-03-24 19:12:11 +08:00
|
|
|
|
nextinsn = 0xffff & read_memory_integer (pc, 2);
|
1999-07-08 04:19:36 +08:00
|
|
|
|
regmask = read_memory_integer (pc + 2, 2);
|
* m68k-tdep.c (P_LINKL_FP, P_LINKW_FP): Macros renamed from P_LINK_L
and P_LINK_W.
(P_PEA_FP, P_MOVL_SP_FP): New macros.
(P_MOVL, P_LEAL, P_MOVML): Macros renamed from P_MOV_L, P_LEA_L and
P_MOVM_L.
(altos_skip_prologue, isi_skip_prologue): Use P_* macros, not octal
constants.
(delta68_in_sigtramp): New function.
(delta68_frame_args_address, delta68_frame_saved_pc): Ditto.
(m68k_skip_prologue): Use P_* macros, not hex constants.
(m68k_find_saved_regs): Do not expect a fixed sequence of register save
instructions, but accept them in any order; use P_* macros, not octal
or hex constants; recognize also `fmovemx to (fp + displacement)' and
`moveml to (fp + displacement)'.
* m68/tm-delta68.h (IN_SIGTRAMP): New macro.
(FRAME_SAVED_PC, FRAME_ARGS_ADDRESS): Ditto.
2000-03-24 19:12:11 +08:00
|
|
|
|
/* fmovemx to -(sp) */
|
|
|
|
|
if (0xf227 == nextinsn && (regmask & 0xff00) == 0xe000)
|
1999-04-16 09:35:26 +08:00
|
|
|
|
{
|
* m68k-tdep.c (P_LINKL_FP, P_LINKW_FP): Macros renamed from P_LINK_L
and P_LINK_W.
(P_PEA_FP, P_MOVL_SP_FP): New macros.
(P_MOVL, P_LEAL, P_MOVML): Macros renamed from P_MOV_L, P_LEA_L and
P_MOVM_L.
(altos_skip_prologue, isi_skip_prologue): Use P_* macros, not octal
constants.
(delta68_in_sigtramp): New function.
(delta68_frame_args_address, delta68_frame_saved_pc): Ditto.
(m68k_skip_prologue): Use P_* macros, not hex constants.
(m68k_find_saved_regs): Do not expect a fixed sequence of register save
instructions, but accept them in any order; use P_* macros, not octal
or hex constants; recognize also `fmovemx to (fp + displacement)' and
`moveml to (fp + displacement)'.
* m68/tm-delta68.h (IN_SIGTRAMP): New macro.
(FRAME_SAVED_PC, FRAME_ARGS_ADDRESS): Ditto.
2000-03-24 19:12:11 +08:00
|
|
|
|
/* Regmask's low bit is for register fp7, the first pushed */
|
|
|
|
|
for (regnum = FP0_REGNUM + 8; --regnum >= FP0_REGNUM; regmask >>= 1)
|
|
|
|
|
if (regmask & 1)
|
|
|
|
|
saved_regs->regs[regnum] = (next_addr -= 12);
|
|
|
|
|
pc += 4;
|
|
|
|
|
}
|
|
|
|
|
/* fmovemx to (fp + displacement) */
|
|
|
|
|
else if (0171056 == nextinsn && (regmask & 0xff00) == 0xf000)
|
|
|
|
|
{
|
|
|
|
|
register CORE_ADDR addr;
|
|
|
|
|
|
|
|
|
|
addr = (frame_info)->frame + read_memory_integer (pc + 4, 2);
|
|
|
|
|
/* Regmask's low bit is for register fp7, the first pushed */
|
|
|
|
|
for (regnum = FP0_REGNUM + 8; --regnum >= FP0_REGNUM; regmask >>= 1)
|
|
|
|
|
if (regmask & 1)
|
|
|
|
|
{
|
|
|
|
|
saved_regs->regs[regnum] = addr;
|
|
|
|
|
addr += 12;
|
|
|
|
|
}
|
|
|
|
|
pc += 6;
|
|
|
|
|
}
|
|
|
|
|
/* moveml to (sp) */
|
|
|
|
|
else if (0044327 == nextinsn)
|
|
|
|
|
{
|
|
|
|
|
/* Regmask's low bit is for register 0, the first written */
|
|
|
|
|
for (regnum = 0; regnum < 16; regnum++, regmask >>= 1)
|
|
|
|
|
if (regmask & 1)
|
|
|
|
|
{
|
|
|
|
|
saved_regs->regs[regnum] = next_addr;
|
|
|
|
|
next_addr += 4;
|
|
|
|
|
}
|
|
|
|
|
pc += 4;
|
|
|
|
|
}
|
|
|
|
|
/* moveml to (fp + displacement) */
|
|
|
|
|
else if (0044356 == nextinsn)
|
|
|
|
|
{
|
|
|
|
|
register CORE_ADDR addr;
|
|
|
|
|
|
|
|
|
|
addr = (frame_info)->frame + read_memory_integer (pc + 4, 2);
|
|
|
|
|
/* Regmask's low bit is for register 0, the first written */
|
|
|
|
|
for (regnum = 0; regnum < 16; regnum++, regmask >>= 1)
|
|
|
|
|
if (regmask & 1)
|
|
|
|
|
{
|
|
|
|
|
saved_regs->regs[regnum] = addr;
|
|
|
|
|
addr += 4;
|
|
|
|
|
}
|
|
|
|
|
pc += 6;
|
|
|
|
|
}
|
|
|
|
|
/* moveml to -(sp) */
|
|
|
|
|
else if (0044347 == nextinsn)
|
|
|
|
|
{
|
|
|
|
|
/* Regmask's low bit is for register 15, the first pushed */
|
|
|
|
|
for (regnum = 16; --regnum >= 0; regmask >>= 1)
|
|
|
|
|
if (regmask & 1)
|
|
|
|
|
saved_regs->regs[regnum] = (next_addr -= 4);
|
|
|
|
|
pc += 4;
|
|
|
|
|
}
|
|
|
|
|
/* movl r,-(sp) */
|
|
|
|
|
else if (0x2f00 == (0xfff0 & nextinsn))
|
|
|
|
|
{
|
|
|
|
|
regnum = 0xf & nextinsn;
|
1999-04-16 09:35:26 +08:00
|
|
|
|
saved_regs->regs[regnum] = (next_addr -= 4);
|
* m68k-tdep.c (P_LINKL_FP, P_LINKW_FP): Macros renamed from P_LINK_L
and P_LINK_W.
(P_PEA_FP, P_MOVL_SP_FP): New macros.
(P_MOVL, P_LEAL, P_MOVML): Macros renamed from P_MOV_L, P_LEA_L and
P_MOVM_L.
(altos_skip_prologue, isi_skip_prologue): Use P_* macros, not octal
constants.
(delta68_in_sigtramp): New function.
(delta68_frame_args_address, delta68_frame_saved_pc): Ditto.
(m68k_skip_prologue): Use P_* macros, not hex constants.
(m68k_find_saved_regs): Do not expect a fixed sequence of register save
instructions, but accept them in any order; use P_* macros, not octal
or hex constants; recognize also `fmovemx to (fp + displacement)' and
`moveml to (fp + displacement)'.
* m68/tm-delta68.h (IN_SIGTRAMP): New macro.
(FRAME_SAVED_PC, FRAME_ARGS_ADDRESS): Ditto.
2000-03-24 19:12:11 +08:00
|
|
|
|
pc += 2;
|
1999-04-16 09:35:26 +08:00
|
|
|
|
}
|
* m68k-tdep.c (P_LINKL_FP, P_LINKW_FP): Macros renamed from P_LINK_L
and P_LINK_W.
(P_PEA_FP, P_MOVL_SP_FP): New macros.
(P_MOVL, P_LEAL, P_MOVML): Macros renamed from P_MOV_L, P_LEA_L and
P_MOVM_L.
(altos_skip_prologue, isi_skip_prologue): Use P_* macros, not octal
constants.
(delta68_in_sigtramp): New function.
(delta68_frame_args_address, delta68_frame_saved_pc): Ditto.
(m68k_skip_prologue): Use P_* macros, not hex constants.
(m68k_find_saved_regs): Do not expect a fixed sequence of register save
instructions, but accept them in any order; use P_* macros, not octal
or hex constants; recognize also `fmovemx to (fp + displacement)' and
`moveml to (fp + displacement)'.
* m68/tm-delta68.h (IN_SIGTRAMP): New macro.
(FRAME_SAVED_PC, FRAME_ARGS_ADDRESS): Ditto.
2000-03-24 19:12:11 +08:00
|
|
|
|
/* fmovemx to index of sp */
|
|
|
|
|
else if (0xf236 == nextinsn && (regmask & 0xff00) == 0xf000)
|
|
|
|
|
{
|
|
|
|
|
/* Regmask's low bit is for register fp0, the first written */
|
|
|
|
|
for (regnum = FP0_REGNUM + 8; --regnum >= FP0_REGNUM; regmask >>= 1)
|
|
|
|
|
if (regmask & 1)
|
|
|
|
|
{
|
|
|
|
|
saved_regs->regs[regnum] = next_addr;
|
|
|
|
|
next_addr += 12;
|
|
|
|
|
}
|
|
|
|
|
pc += 10;
|
|
|
|
|
}
|
|
|
|
|
/* clrw -(sp); movw ccr,-(sp) */
|
|
|
|
|
else if (0x4267 == nextinsn && 0x42e7 == regmask)
|
|
|
|
|
{
|
|
|
|
|
saved_regs->regs[PS_REGNUM] = (next_addr -= 4);
|
|
|
|
|
pc += 4;
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
break;
|
1999-04-16 09:35:26 +08:00
|
|
|
|
}
|
1999-07-08 04:19:36 +08:00
|
|
|
|
lose:;
|
|
|
|
|
saved_regs->regs[SP_REGNUM] = (frame_info)->frame + 8;
|
|
|
|
|
saved_regs->regs[FP_REGNUM] = (frame_info)->frame;
|
|
|
|
|
saved_regs->regs[PC_REGNUM] = (frame_info)->frame + 4;
|
1999-04-16 09:35:26 +08:00
|
|
|
|
#ifdef SIG_SP_FP_OFFSET
|
|
|
|
|
/* Adjust saved SP_REGNUM for fake _sigtramp frames. */
|
|
|
|
|
if (frame_info->signal_handler_caller && frame_info->next)
|
|
|
|
|
saved_regs->regs[SP_REGNUM] = frame_info->next->frame + SIG_SP_FP_OFFSET;
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
1999-07-08 04:19:36 +08:00
|
|
|
|
#ifdef USE_PROC_FS /* Target dependent support for /proc */
|
1999-04-16 09:35:26 +08:00
|
|
|
|
|
|
|
|
|
#include <sys/procfs.h>
|
|
|
|
|
|
2000-05-26 Michael Snyder <msnyder@seadog.cygnus.com>
* gregset.h: New file. Typedefs for gdb_gregset_t and
gdb_fpregset_t, prototypes for supply_gregset and friends.
* procfs.c: Include gregset.h. Delete local prototypes for
supply_gregset etc., and local typedef gdb_gregset_t etc.
* sol-thread.c: Include gregset.h, delete local prototypes,
add appropriate casts to gdb_gregset_t.
* uw-thread.c, lin-thread.c, core-sol2.c, core-regset.c,
sparc-tdep.c, ptx4-nat.c, ppc-linux-nat.c, mipsv4-nat.c,
m88k-nat.c, m68klinux-nat.c, m68k-tdep.c, irix5-nat.c,
irix4-nat.c, ia64-linux-nat.c, i386v4-nat.c, cxux-nat.c,
arm-linux-nat.c, alpha-nat.c: Include gregset.h.
* config/nm-linux.h: Define GDB_GREGSET_T, GDB_FPREGET_T.
* config/sparc/tm-sun4sol2.h: Ditto.
2000-05-27 07:22:41 +08:00
|
|
|
|
/* Prototypes for supply_gregset etc. */
|
|
|
|
|
#include "gregset.h"
|
|
|
|
|
|
1999-04-16 09:35:26 +08:00
|
|
|
|
/* The /proc interface divides the target machine's register set up into
|
1999-07-08 04:19:36 +08:00
|
|
|
|
two different sets, the general register set (gregset) and the floating
|
|
|
|
|
point register set (fpregset). For each set, there is an ioctl to get
|
|
|
|
|
the current register set and another ioctl to set the current values.
|
1999-04-16 09:35:26 +08:00
|
|
|
|
|
1999-07-08 04:19:36 +08:00
|
|
|
|
The actual structure passed through the ioctl interface is, of course,
|
|
|
|
|
naturally machine dependent, and is different for each set of registers.
|
|
|
|
|
For the m68k for example, the general register set is typically defined
|
|
|
|
|
by:
|
1999-04-16 09:35:26 +08:00
|
|
|
|
|
1999-07-08 04:19:36 +08:00
|
|
|
|
typedef int gregset_t[18];
|
1999-04-16 09:35:26 +08:00
|
|
|
|
|
1999-07-08 04:19:36 +08:00
|
|
|
|
#define R_D0 0
|
|
|
|
|
...
|
|
|
|
|
#define R_PS 17
|
1999-04-16 09:35:26 +08:00
|
|
|
|
|
1999-07-08 04:19:36 +08:00
|
|
|
|
and the floating point set by:
|
1999-04-16 09:35:26 +08:00
|
|
|
|
|
1999-07-08 04:19:36 +08:00
|
|
|
|
typedef struct fpregset {
|
|
|
|
|
int f_pcr;
|
|
|
|
|
int f_psr;
|
|
|
|
|
int f_fpiaddr;
|
|
|
|
|
int f_fpregs[8][3]; (8 regs, 96 bits each)
|
|
|
|
|
} fpregset_t;
|
1999-04-16 09:35:26 +08:00
|
|
|
|
|
1999-07-08 04:19:36 +08:00
|
|
|
|
These routines provide the packing and unpacking of gregset_t and
|
|
|
|
|
fpregset_t formatted data.
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1999-04-16 09:35:26 +08:00
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*/
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/* Atari SVR4 has R_SR but not R_PS */
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#if !defined (R_PS) && defined (R_SR)
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#define R_PS R_SR
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#endif
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/* Given a pointer to a general register set in /proc format (gregset_t *),
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1999-07-08 04:19:36 +08:00
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unpack the register contents and supply them as gdb's idea of the current
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register values. */
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1999-04-16 09:35:26 +08:00
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void
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2000-07-30 09:48:28 +08:00
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supply_gregset (gregset_t *gregsetp)
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1999-04-16 09:35:26 +08:00
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{
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register int regi;
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register greg_t *regp = (greg_t *) gregsetp;
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1999-07-08 04:19:36 +08:00
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for (regi = 0; regi < R_PC; regi++)
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1999-04-16 09:35:26 +08:00
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{
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supply_register (regi, (char *) (regp + regi));
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}
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supply_register (PS_REGNUM, (char *) (regp + R_PS));
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supply_register (PC_REGNUM, (char *) (regp + R_PC));
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}
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void
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2000-07-30 09:48:28 +08:00
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fill_gregset (gregset_t *gregsetp, int regno)
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1999-04-16 09:35:26 +08:00
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{
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register int regi;
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register greg_t *regp = (greg_t *) gregsetp;
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1999-07-08 04:19:36 +08:00
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for (regi = 0; regi < R_PC; regi++)
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1999-04-16 09:35:26 +08:00
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{
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if ((regno == -1) || (regno == regi))
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{
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*(regp + regi) = *(int *) ®isters[REGISTER_BYTE (regi)];
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}
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}
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if ((regno == -1) || (regno == PS_REGNUM))
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{
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*(regp + R_PS) = *(int *) ®isters[REGISTER_BYTE (PS_REGNUM)];
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}
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if ((regno == -1) || (regno == PC_REGNUM))
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{
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*(regp + R_PC) = *(int *) ®isters[REGISTER_BYTE (PC_REGNUM)];
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}
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}
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#if defined (FP0_REGNUM)
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/* Given a pointer to a floating point register set in /proc format
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1999-07-08 04:19:36 +08:00
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(fpregset_t *), unpack the register contents and supply them as gdb's
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idea of the current floating point register values. */
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1999-04-16 09:35:26 +08:00
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1999-07-08 04:19:36 +08:00
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void
|
2000-07-30 09:48:28 +08:00
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supply_fpregset (fpregset_t *fpregsetp)
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1999-04-16 09:35:26 +08:00
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{
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register int regi;
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char *from;
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1999-07-08 04:19:36 +08:00
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for (regi = FP0_REGNUM; regi < FPC_REGNUM; regi++)
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1999-04-16 09:35:26 +08:00
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{
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1999-07-08 04:19:36 +08:00
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from = (char *) &(fpregsetp->f_fpregs[regi - FP0_REGNUM][0]);
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1999-04-16 09:35:26 +08:00
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supply_register (regi, from);
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}
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1999-07-08 04:19:36 +08:00
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supply_register (FPC_REGNUM, (char *) &(fpregsetp->f_pcr));
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supply_register (FPS_REGNUM, (char *) &(fpregsetp->f_psr));
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supply_register (FPI_REGNUM, (char *) &(fpregsetp->f_fpiaddr));
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1999-04-16 09:35:26 +08:00
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}
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/* Given a pointer to a floating point register set in /proc format
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1999-07-08 04:19:36 +08:00
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(fpregset_t *), update the register specified by REGNO from gdb's idea
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of the current floating point register set. If REGNO is -1, update
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them all. */
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1999-04-16 09:35:26 +08:00
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void
|
2000-07-30 09:48:28 +08:00
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fill_fpregset (fpregset_t *fpregsetp, int regno)
|
1999-04-16 09:35:26 +08:00
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{
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int regi;
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char *to;
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char *from;
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1999-07-08 04:19:36 +08:00
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for (regi = FP0_REGNUM; regi < FPC_REGNUM; regi++)
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1999-04-16 09:35:26 +08:00
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{
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if ((regno == -1) || (regno == regi))
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{
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from = (char *) ®isters[REGISTER_BYTE (regi)];
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1999-07-08 04:19:36 +08:00
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to = (char *) &(fpregsetp->f_fpregs[regi - FP0_REGNUM][0]);
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1999-04-16 09:35:26 +08:00
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memcpy (to, from, REGISTER_RAW_SIZE (regi));
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}
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}
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if ((regno == -1) || (regno == FPC_REGNUM))
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{
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1999-07-08 04:19:36 +08:00
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fpregsetp->f_pcr = *(int *) ®isters[REGISTER_BYTE (FPC_REGNUM)];
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1999-04-16 09:35:26 +08:00
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}
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if ((regno == -1) || (regno == FPS_REGNUM))
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{
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1999-07-08 04:19:36 +08:00
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fpregsetp->f_psr = *(int *) ®isters[REGISTER_BYTE (FPS_REGNUM)];
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1999-04-16 09:35:26 +08:00
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}
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if ((regno == -1) || (regno == FPI_REGNUM))
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{
|
1999-07-08 04:19:36 +08:00
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fpregsetp->f_fpiaddr = *(int *) ®isters[REGISTER_BYTE (FPI_REGNUM)];
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1999-04-16 09:35:26 +08:00
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}
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}
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1999-07-08 04:19:36 +08:00
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#endif /* defined (FP0_REGNUM) */
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1999-04-16 09:35:26 +08:00
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1999-07-08 04:19:36 +08:00
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#endif /* USE_PROC_FS */
|
1999-04-16 09:35:26 +08:00
|
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/* Figure out where the longjmp will land. Slurp the args out of the stack.
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|
We expect the first arg to be a pointer to the jmp_buf structure from which
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|
we extract the pc (JB_PC) that we will land at. The pc is copied into PC.
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This routine returns true on success. */
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|
2000-11-08 20:26:15 +08:00
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/* NOTE: cagney/2000-11-08: For this function to be fully multi-arched
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the macro's JB_PC and JB_ELEMENT_SIZE would need to be moved into
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|
the ``struct gdbarch_tdep'' object and then set on a target ISA/ABI
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|
dependant basis. */
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|
1999-04-16 09:35:26 +08:00
|
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int
|
2000-11-08 19:55:34 +08:00
|
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|
|
m68k_get_longjmp_target (CORE_ADDR *pc)
|
1999-04-16 09:35:26 +08:00
|
|
|
|
{
|
2000-11-08 20:26:15 +08:00
|
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|
#if defined (JB_PC) && defined (JB_ELEMENT_SIZE)
|
2000-08-10 04:09:01 +08:00
|
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|
char *buf;
|
1999-04-16 09:35:26 +08:00
|
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|
CORE_ADDR sp, jb_addr;
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|
2000-08-10 04:09:01 +08:00
|
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buf = alloca (TARGET_PTR_BIT / TARGET_CHAR_BIT);
|
1999-07-08 04:19:36 +08:00
|
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|
sp = read_register (SP_REGNUM);
|
1999-04-16 09:35:26 +08:00
|
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|
1999-07-08 04:19:36 +08:00
|
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|
if (target_read_memory (sp + SP_ARG0, /* Offset of first arg on stack */
|
1999-04-16 09:35:26 +08:00
|
|
|
|
buf,
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TARGET_PTR_BIT / TARGET_CHAR_BIT))
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|
return 0;
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|
|
jb_addr = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
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|
if (target_read_memory (jb_addr + JB_PC * JB_ELEMENT_SIZE, buf,
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|
TARGET_PTR_BIT / TARGET_CHAR_BIT))
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|
return 0;
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|
|
*pc = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
|
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|
|
return 1;
|
2000-11-08 20:26:15 +08:00
|
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|
|
#else
|
2001-02-08 14:03:54 +08:00
|
|
|
|
internal_error (__FILE__, __LINE__,
|
|
|
|
|
"m68k_get_longjmp_target: not implemented");
|
2000-11-08 20:26:15 +08:00
|
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|
|
return 0;
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|
|
|
#endif
|
1999-04-16 09:35:26 +08:00
|
|
|
|
}
|
|
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|
|
/* Immediately after a function call, return the saved pc before the frame
|
|
|
|
|
is setup. For sun3's, we check for the common case of being inside of a
|
|
|
|
|
system call, and if so, we know that Sun pushes the call # on the stack
|
|
|
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|
prior to doing the trap. */
|
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|
|
CORE_ADDR
|
2000-07-30 09:48:28 +08:00
|
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|
|
m68k_saved_pc_after_call (struct frame_info *frame)
|
1999-04-16 09:35:26 +08:00
|
|
|
|
{
|
|
|
|
|
#ifdef SYSCALL_TRAP
|
|
|
|
|
int op;
|
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|
|
|
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|
|
op = read_memory_integer (frame->pc - SYSCALL_TRAP_OFFSET, 2);
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|
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|
|
if (op == SYSCALL_TRAP)
|
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|
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|
return read_memory_integer (read_register (SP_REGNUM) + 4, 4);
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|
|
|
else
|
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|
|
#endif /* SYSCALL_TRAP */
|
|
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|
|
return read_memory_integer (read_register (SP_REGNUM), 4);
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|
|
|
|
}
|
|
|
|
|
|
1999-10-06 07:13:56 +08:00
|
|
|
|
|
1999-04-16 09:35:26 +08:00
|
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|
|
void
|
2000-07-30 09:48:28 +08:00
|
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|
|
_initialize_m68k_tdep (void)
|
1999-04-16 09:35:26 +08:00
|
|
|
|
{
|
|
|
|
|
tm_print_insn = print_insn_m68k;
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|
|
|
}
|