1991-03-29 00:28:29 +08:00
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/* Parameters for execution on a 68000 series machine.
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* environ.h, expression.h, frame.h, gdbcmd.h, gdbcore.h,
inferior.h, language.h, signame.h, target.h, terminal.h,
tm-68k.h, tm-i386v.h, tm-sparc.h, tm-sun386.h, tm-symmetry.h,
xm-i386v.h, xm-sparc.h: Prototypes for all external functions.
Lint.
1992-02-21 09:31:56 +08:00
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Copyright 1986, 1987, 1989, 1990, 1992 Free Software Foundation, Inc.
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1991-03-29 00:28:29 +08:00
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This file is part of GDB.
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1991-06-04 16:31:55 +09:00
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This program is free software; you can redistribute it and/or modify
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1991-03-29 00:28:29 +08:00
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it under the terms of the GNU General Public License as published by
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1991-06-04 16:31:55 +09:00
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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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1991-03-29 00:28:29 +08:00
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1991-06-04 16:31:55 +09:00
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This program is distributed in the hope that it will be useful,
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1991-03-29 00:28:29 +08:00
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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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You should have received a copy of the GNU General Public License
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1991-06-04 16:31:55 +09:00
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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1991-03-29 00:28:29 +08:00
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1991-10-25 14:29:23 +08:00
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/* Generic 68000 stuff, to be included by other tm-*.h files.
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1991-03-29 00:28:29 +08:00
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Define HAVE_68881 if that is the case. */
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#if defined (HAVE_68881)
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#define IEEE_FLOAT 1
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#endif
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/* Define the bit, byte, and word ordering of the machine. */
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#define TARGET_BYTE_ORDER BIG_ENDIAN
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/* Offset from address of function to start of its code.
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Zero on most machines. */
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#define FUNCTION_START_OFFSET 0
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/* Advance PC across any function entry prologue instructions
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to reach some "real" code. */
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1991-11-19 09:54:52 +08:00
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#if !defined(SKIP_PROLOGUE)
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#define SKIP_PROLOGUE(ip) {(ip) = m68k_skip_prologue(ip);}
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* environ.h, expression.h, frame.h, gdbcmd.h, gdbcore.h,
inferior.h, language.h, signame.h, target.h, terminal.h,
tm-68k.h, tm-i386v.h, tm-sparc.h, tm-sun386.h, tm-symmetry.h,
xm-i386v.h, xm-sparc.h: Prototypes for all external functions.
Lint.
1992-02-21 09:31:56 +08:00
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extern CORE_ADDR m68k_skip_prologue PARAMS ((CORE_ADDR ip));
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1991-11-19 09:54:52 +08:00
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#endif
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1991-03-29 00:28:29 +08:00
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/* Immediately after a function call, return the saved pc.
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Can't always go through the frames for this because on some machines
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the new frame is not set up until the new function executes
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some instructions. */
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#define SAVED_PC_AFTER_CALL(frame) \
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read_memory_integer (read_register (SP_REGNUM), 4)
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/* Stack grows downward. */
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#define INNER_THAN <
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/* Sequence of bytes for breakpoint instruction.
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This is a TRAP instruction. The last 4 bits (0xf below) is the
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1991-10-25 14:29:23 +08:00
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vector. Systems which don't use 0xf should define BPT_VECTOR
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1991-03-29 00:28:29 +08:00
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themselves before including this file. */
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1991-11-19 09:54:52 +08:00
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#if !defined (BPT_VECTOR)
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1991-10-25 14:29:23 +08:00
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#define BPT_VECTOR 0xf
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#endif
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1991-03-29 00:28:29 +08:00
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#if !defined (BREAKPOINT)
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1991-10-25 14:29:23 +08:00
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#define BREAKPOINT {0x4e, (0x40 | BPT_VECTOR)}
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1991-03-29 00:28:29 +08:00
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#endif
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/* If your kernel resets the pc after the trap happens you may need to
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1991-10-24 18:21:41 +08:00
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define this before including this file. */
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1991-03-29 00:28:29 +08:00
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#if !defined (DECR_PC_AFTER_BREAK)
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#define DECR_PC_AFTER_BREAK 2
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#endif
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/* Nonzero if instruction at PC is a return instruction. */
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/* Allow any of the return instructions, including a trapv and a return
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from interupt. */
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#define ABOUT_TO_RETURN(pc) ((read_memory_integer (pc, 2) & ~0x3) == 0x4e74)
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/* Return 1 if P points to an invalid floating point value. */
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#define INVALID_FLOAT(p, len) 0 /* Just a first guess; not checked */
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/* Say how long registers are. */
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#define REGISTER_TYPE long
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#if defined (HAVE_68881)
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1991-05-01 04:50:49 +09:00
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# if defined (GDB_TARGET_IS_SUN3)
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1991-03-29 00:28:29 +08:00
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/* Sun3 status includes fpflags, which shows whether the FPU has been used
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by the process, and whether the FPU was done with an instruction or
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was interrupted in the middle of a long instruction. See
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<machine/reg.h>. */
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/* a&d, pc,sr, fp, fpstat, fpflags */
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# define NUM_REGS 31
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# define REGISTER_BYTES (16*4 + 8 + 8*12 + 3*4 + 4)
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# else /* Not sun3. */
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# define NUM_REGS 29
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# define REGISTER_BYTES (16*4 + 8 + 8*12 + 3*4)
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# endif /* Not sun3. */
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#else /* No 68881. */
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# define NUM_REGS 18
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# define REGISTER_BYTES (16*4 + 8)
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#endif /* No 68881. */
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/* Index within `registers' of the first byte of the space for
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register N. */
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#if defined (HAVE_68881)
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#define REGISTER_BYTE(N) \
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((N) >= FPC_REGNUM ? (((N) - FPC_REGNUM) * 4) + 168 \
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: (N) >= FP0_REGNUM ? (((N) - FP0_REGNUM) * 12) + 72 \
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: (N) * 4)
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/* Number of bytes of storage in the actual machine representation
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for register N. On the 68000, all regs are 4 bytes
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except the floating point regs which are 12 bytes. */
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/* Note that the unsigned cast here forces the result of the
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subtraction to very high positive values if N < FP0_REGNUM */
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#define REGISTER_RAW_SIZE(N) (((unsigned)(N) - FP0_REGNUM) < 8 ? 12 : 4)
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/* Number of bytes of storage in the program's representation
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for register N. On the 68000, all regs are 4 bytes
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except the floating point regs which are 8-byte doubles. */
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#define REGISTER_VIRTUAL_SIZE(N) (((unsigned)(N) - FP0_REGNUM) < 8 ? 8 : 4)
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/* Largest value REGISTER_RAW_SIZE can have. */
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#define MAX_REGISTER_RAW_SIZE 12
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/* Largest value REGISTER_VIRTUAL_SIZE can have. */
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#define MAX_REGISTER_VIRTUAL_SIZE 8
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/* Nonzero if register N requires conversion
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from raw format to virtual format. */
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#define REGISTER_CONVERTIBLE(N) (((unsigned)(N) - FP0_REGNUM) < 8)
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1991-04-20 07:04:24 +09:00
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/* Put the declaration out here because if it's in the macros, PCC
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will complain. */
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* environ.h, expression.h, frame.h, gdbcmd.h, gdbcore.h,
inferior.h, language.h, signame.h, target.h, terminal.h,
tm-68k.h, tm-i386v.h, tm-sparc.h, tm-sun386.h, tm-symmetry.h,
xm-i386v.h, xm-sparc.h: Prototypes for all external functions.
Lint.
1992-02-21 09:31:56 +08:00
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extern const struct ext_format ext_format_68881;
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1991-04-20 07:04:24 +09:00
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1991-03-29 00:28:29 +08:00
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/* Convert data from raw format for register REGNUM
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to virtual format for register REGNUM. */
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#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO) \
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{ \
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if ((REGNUM) >= FP0_REGNUM && (REGNUM) < FPC_REGNUM) \
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1991-08-22 10:42:18 +09:00
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ieee_extended_to_double (&ext_format_68881, (FROM), (double *)(TO)); \
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1991-03-29 00:28:29 +08:00
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else \
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* environ.h, expression.h, frame.h, gdbcmd.h, gdbcore.h,
inferior.h, language.h, signame.h, target.h, terminal.h,
tm-68k.h, tm-i386v.h, tm-sparc.h, tm-sun386.h, tm-symmetry.h,
xm-i386v.h, xm-sparc.h: Prototypes for all external functions.
Lint.
1992-02-21 09:31:56 +08:00
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memcpy ((TO), (FROM), 4); \
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1991-03-29 00:28:29 +08:00
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}
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/* Convert data from virtual format for register REGNUM
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to raw format for register REGNUM. */
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#define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO) \
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{ \
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if ((REGNUM) >= FP0_REGNUM && (REGNUM) < FPC_REGNUM) \
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1991-08-22 10:42:18 +09:00
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double_to_ieee_extended (&ext_format_68881, (double *)(FROM), (TO)); \
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1991-03-29 00:28:29 +08:00
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else \
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* environ.h, expression.h, frame.h, gdbcmd.h, gdbcore.h,
inferior.h, language.h, signame.h, target.h, terminal.h,
tm-68k.h, tm-i386v.h, tm-sparc.h, tm-sun386.h, tm-symmetry.h,
xm-i386v.h, xm-sparc.h: Prototypes for all external functions.
Lint.
1992-02-21 09:31:56 +08:00
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memcpy ((TO), (FROM), 4); \
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1991-03-29 00:28:29 +08:00
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}
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/* Return the GDB type object for the "standard" data type
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of data in register N. */
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/* Note, for registers which contain addresses return
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pointer to void, not pointer to char, because we don't
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want to attempt to print the string after printing the address. */
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#define REGISTER_VIRTUAL_TYPE(N) \
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(((unsigned)(N) - FP0_REGNUM) < 8 ? builtin_type_double : \
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(N) == PC_REGNUM || (N) == FP_REGNUM || (N) == SP_REGNUM ? \
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lookup_pointer_type (builtin_type_void) : builtin_type_int)
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#else /* no 68881. */
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/* Index within `registers' of the first byte of the space for
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register N. */
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#define REGISTER_BYTE(N) ((N) * 4)
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/* Number of bytes of storage in the actual machine representation
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for register N. On the 68000, all regs are 4 bytes. */
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#define REGISTER_RAW_SIZE(N) 4
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/* Number of bytes of storage in the program's representation
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for register N. On the 68000, all regs are 4 bytes. */
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#define REGISTER_VIRTUAL_SIZE(N) 4
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/* Largest value REGISTER_RAW_SIZE can have. */
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#define MAX_REGISTER_RAW_SIZE 4
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/* Largest value REGISTER_VIRTUAL_SIZE can have. */
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#define MAX_REGISTER_VIRTUAL_SIZE 4
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/* Nonzero if register N requires conversion
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from raw format to virtual format. */
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#define REGISTER_CONVERTIBLE(N) 0
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/* Convert data from raw format for register REGNUM
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to virtual format for register REGNUM. */
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* environ.h, expression.h, frame.h, gdbcmd.h, gdbcore.h,
inferior.h, language.h, signame.h, target.h, terminal.h,
tm-68k.h, tm-i386v.h, tm-sparc.h, tm-sun386.h, tm-symmetry.h,
xm-i386v.h, xm-sparc.h: Prototypes for all external functions.
Lint.
1992-02-21 09:31:56 +08:00
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#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO) memcpy ((TO), (FROM), 4);
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1991-03-29 00:28:29 +08:00
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/* Convert data from virtual format for register REGNUM
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to raw format for register REGNUM. */
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* environ.h, expression.h, frame.h, gdbcmd.h, gdbcore.h,
inferior.h, language.h, signame.h, target.h, terminal.h,
tm-68k.h, tm-i386v.h, tm-sparc.h, tm-sun386.h, tm-symmetry.h,
xm-i386v.h, xm-sparc.h: Prototypes for all external functions.
Lint.
1992-02-21 09:31:56 +08:00
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#define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO) memcpy ((TO), (FROM), 4);
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1991-03-29 00:28:29 +08:00
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/* Return the GDB type object for the "standard" data type
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of data in register N. */
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#define REGISTER_VIRTUAL_TYPE(N) builtin_type_int
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#endif /* No 68881. */
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/* Initializer for an array of names of registers.
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Entries beyond the first NUM_REGS are ignored. */
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#define REGISTER_NAMES \
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{"d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7", \
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"a0", "a1", "a2", "a3", "a4", "a5", "fp", "sp", \
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"ps", "pc", \
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"fp0", "fp1", "fp2", "fp3", "fp4", "fp5", "fp6", "fp7", \
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"fpcontrol", "fpstatus", "fpiaddr", "fpcode", "fpflags" }
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/* Register numbers of various important registers.
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Note that some of these values are "real" register numbers,
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and correspond to the general registers of the machine,
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and some are "phony" register numbers which are too large
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to be actual register numbers as far as the user is concerned
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but do serve to get the desired values when passed to read_register. */
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#define A1_REGNUM 9
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#define FP_REGNUM 14 /* Contains address of executing stack frame */
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#define SP_REGNUM 15 /* Contains address of top of stack */
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#define PS_REGNUM 16 /* Contains processor status */
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#define PC_REGNUM 17 /* Contains program counter */
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#if defined (HAVE_68881)
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#define FP0_REGNUM 18 /* Floating point register 0 */
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#define FPC_REGNUM 26 /* 68881 control register */
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#define FPS_REGNUM 27 /* 68881 status register */
|
1991-10-16 07:29:34 +08:00
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#define FPI_REGNUM 28 /* 68881 iaddr register */
|
1991-03-29 00:28:29 +08:00
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#endif /* 68881. */
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|
|
|
/* Store the address of the place in which to copy the structure the
|
|
|
|
|
subroutine will return. This is called from call_function. */
|
|
|
|
|
|
|
|
|
|
#define STORE_STRUCT_RETURN(ADDR, SP) \
|
|
|
|
|
{ write_register (A1_REGNUM, (ADDR)); }
|
|
|
|
|
|
|
|
|
|
/* Extract from an array REGBUF containing the (raw) register state
|
|
|
|
|
a function return value of type TYPE, and copy that, in virtual format,
|
|
|
|
|
into VALBUF. This is assuming that floating point values are returned
|
|
|
|
|
as doubles in d0/d1. */
|
|
|
|
|
|
|
|
|
|
#if !defined (EXTRACT_RETURN_VALUE)
|
|
|
|
|
#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
|
* environ.h, expression.h, frame.h, gdbcmd.h, gdbcore.h,
inferior.h, language.h, signame.h, target.h, terminal.h,
tm-68k.h, tm-i386v.h, tm-sparc.h, tm-sun386.h, tm-symmetry.h,
xm-i386v.h, xm-sparc.h: Prototypes for all external functions.
Lint.
1992-02-21 09:31:56 +08:00
|
|
|
|
memcpy ((VALBUF), \
|
|
|
|
|
(char *)(REGBUF) + \
|
1991-10-26 09:06:16 +08:00
|
|
|
|
(TYPE_LENGTH(TYPE) >= 4 ? 0 : 4 - TYPE_LENGTH(TYPE)), \
|
* environ.h, expression.h, frame.h, gdbcmd.h, gdbcore.h,
inferior.h, language.h, signame.h, target.h, terminal.h,
tm-68k.h, tm-i386v.h, tm-sparc.h, tm-sun386.h, tm-symmetry.h,
xm-i386v.h, xm-sparc.h: Prototypes for all external functions.
Lint.
1992-02-21 09:31:56 +08:00
|
|
|
|
TYPE_LENGTH(TYPE))
|
1991-03-29 00:28:29 +08:00
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
/* Write into appropriate registers a function return value
|
|
|
|
|
of type TYPE, given in virtual format. Assumes floats are passed
|
|
|
|
|
in d0/d1. */
|
|
|
|
|
|
|
|
|
|
#if !defined (STORE_RETURN_VALUE)
|
|
|
|
|
#define STORE_RETURN_VALUE(TYPE,VALBUF) \
|
|
|
|
|
write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE))
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
/* Extract from an array REGBUF containing the (raw) register state
|
|
|
|
|
the address in which a function should return its structure value,
|
|
|
|
|
as a CORE_ADDR (or an expression that can be used as one). */
|
|
|
|
|
|
1991-05-02 13:28:42 +09:00
|
|
|
|
#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(CORE_ADDR *)(REGBUF))
|
1991-03-29 00:28:29 +08:00
|
|
|
|
|
|
|
|
|
/* Describe the pointer in each stack frame to the previous stack frame
|
|
|
|
|
(its caller). */
|
|
|
|
|
|
1992-03-21 09:56:01 +08:00
|
|
|
|
/* FRAME_CHAIN takes a frame's nominal address and produces the frame's
|
|
|
|
|
chain-pointer.
|
|
|
|
|
In the case of the 68000, the frame's nominal address
|
1991-03-29 00:28:29 +08:00
|
|
|
|
is the address of a 4-byte word containing the calling frame's address. */
|
|
|
|
|
|
|
|
|
|
#define FRAME_CHAIN(thisframe) \
|
1992-03-21 09:56:01 +08:00
|
|
|
|
(!inside_entry_file ((thisframe)->pc) ? \
|
1991-03-29 00:28:29 +08:00
|
|
|
|
read_memory_integer ((thisframe)->frame, 4) :\
|
|
|
|
|
0)
|
|
|
|
|
|
|
|
|
|
/* Define other aspects of the stack frame. */
|
|
|
|
|
|
|
|
|
|
/* A macro that tells us whether the function invocation represented
|
|
|
|
|
by FI does not have a frame on the stack associated with it. If it
|
|
|
|
|
does not, FRAMELESS is set to 1, else 0. */
|
|
|
|
|
#define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
|
|
|
|
|
(FRAMELESS) = frameless_look_for_prologue(FI)
|
|
|
|
|
|
|
|
|
|
#define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame + 4, 4))
|
|
|
|
|
|
|
|
|
|
#define FRAME_ARGS_ADDRESS(fi) ((fi)->frame)
|
|
|
|
|
|
|
|
|
|
#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)
|
|
|
|
|
|
|
|
|
|
/* Set VAL to the number of args passed to frame described by FI.
|
|
|
|
|
Can set VAL to -1, meaning no way to tell. */
|
|
|
|
|
|
|
|
|
|
/* We can't tell how many args there are
|
|
|
|
|
now that the C compiler delays popping them. */
|
|
|
|
|
#if !defined (FRAME_NUM_ARGS)
|
|
|
|
|
#define FRAME_NUM_ARGS(val,fi) (val = -1)
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
/* Return number of bytes at start of arglist that are not really args. */
|
|
|
|
|
|
|
|
|
|
#define FRAME_ARGS_SKIP 8
|
|
|
|
|
|
|
|
|
|
/* Put here the code to store, into a struct frame_saved_regs,
|
|
|
|
|
the addresses of the saved registers of frame described by FRAME_INFO.
|
|
|
|
|
This includes special registers such as pc and fp saved in special
|
|
|
|
|
ways in the stack frame. sp is even more special:
|
|
|
|
|
the address we return for it IS the sp for the next frame. */
|
|
|
|
|
|
|
|
|
|
#if !defined (FRAME_FIND_SAVED_REGS)
|
|
|
|
|
#if defined (HAVE_68881)
|
|
|
|
|
#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
|
|
|
|
|
{ register int regnum; \
|
|
|
|
|
register int regmask; \
|
|
|
|
|
register CORE_ADDR next_addr; \
|
|
|
|
|
register CORE_ADDR pc; \
|
|
|
|
|
int nextinsn; \
|
|
|
|
|
bzero (&frame_saved_regs, sizeof frame_saved_regs); \
|
|
|
|
|
if ((frame_info)->pc >= (frame_info)->frame - CALL_DUMMY_LENGTH - FP_REGNUM*4 - 8*12 - 4 \
|
|
|
|
|
&& (frame_info)->pc <= (frame_info)->frame) \
|
|
|
|
|
{ next_addr = (frame_info)->frame; \
|
|
|
|
|
pc = (frame_info)->frame - CALL_DUMMY_LENGTH - FP_REGNUM * 4 - 8*12 - 4; }\
|
|
|
|
|
else \
|
|
|
|
|
{ pc = get_pc_function_start ((frame_info)->pc); \
|
|
|
|
|
/* Verify we have a link a6 instruction next; \
|
|
|
|
|
if not we lose. If we win, find the address above the saved \
|
|
|
|
|
regs using the amount of storage from the link instruction. */\
|
|
|
|
|
if (044016 == read_memory_integer (pc, 2)) \
|
|
|
|
|
next_addr = (frame_info)->frame + read_memory_integer (pc += 2, 4), pc+=4; \
|
|
|
|
|
else if (047126 == read_memory_integer (pc, 2)) \
|
|
|
|
|
next_addr = (frame_info)->frame + read_memory_integer (pc += 2, 2), pc+=2; \
|
|
|
|
|
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; \
|
|
|
|
|
} \
|
|
|
|
|
/* next should be a moveml to (sp) or -(sp) or a movl r,-(sp) */ \
|
|
|
|
|
regmask = read_memory_integer (pc + 2, 2); \
|
|
|
|
|
/* But before that can come an fmovem. Check for it. */ \
|
|
|
|
|
nextinsn = 0xffff & read_memory_integer (pc, 2); \
|
|
|
|
|
if (0xf227 == nextinsn \
|
|
|
|
|
&& (regmask & 0xff00) == 0xe000) \
|
|
|
|
|
{ pc += 4; /* Regmask's low bit is for register fp7, the first pushed */ \
|
|
|
|
|
for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--, regmask >>= 1) \
|
|
|
|
|
if (regmask & 1) \
|
|
|
|
|
(frame_saved_regs).regs[regnum] = (next_addr -= 12); \
|
|
|
|
|
regmask = read_memory_integer (pc + 2, 2); } \
|
|
|
|
|
if (0044327 == read_memory_integer (pc, 2)) \
|
|
|
|
|
{ pc += 4; /* Regmask's low bit is for register 0, the first written */ \
|
|
|
|
|
for (regnum = 0; regnum < 16; regnum++, regmask >>= 1) \
|
|
|
|
|
if (regmask & 1) \
|
|
|
|
|
(frame_saved_regs).regs[regnum] = (next_addr += 4) - 4; } \
|
|
|
|
|
else if (0044347 == read_memory_integer (pc, 2)) \
|
|
|
|
|
{ pc += 4; /* Regmask's low bit is for register 15, the first pushed */ \
|
|
|
|
|
for (regnum = 15; regnum >= 0; regnum--, regmask >>= 1) \
|
|
|
|
|
if (regmask & 1) \
|
|
|
|
|
(frame_saved_regs).regs[regnum] = (next_addr -= 4); } \
|
|
|
|
|
else if (0x2f00 == (0xfff0 & read_memory_integer (pc, 2))) \
|
|
|
|
|
{ regnum = 0xf & read_memory_integer (pc, 2); pc += 2; \
|
|
|
|
|
(frame_saved_regs).regs[regnum] = (next_addr -= 4); } \
|
|
|
|
|
/* fmovemx to index of sp may follow. */ \
|
|
|
|
|
regmask = read_memory_integer (pc + 2, 2); \
|
|
|
|
|
nextinsn = 0xffff & read_memory_integer (pc, 2); \
|
|
|
|
|
if (0xf236 == nextinsn \
|
|
|
|
|
&& (regmask & 0xff00) == 0xf000) \
|
|
|
|
|
{ pc += 10; /* Regmask's low bit is for register fp0, the first written */ \
|
|
|
|
|
for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--, regmask >>= 1) \
|
|
|
|
|
if (regmask & 1) \
|
|
|
|
|
(frame_saved_regs).regs[regnum] = (next_addr += 12) - 12; \
|
|
|
|
|
regmask = read_memory_integer (pc + 2, 2); } \
|
|
|
|
|
/* clrw -(sp); movw ccr,-(sp) may follow. */ \
|
|
|
|
|
if (0x426742e7 == read_memory_integer (pc, 4)) \
|
|
|
|
|
(frame_saved_regs).regs[PS_REGNUM] = (next_addr -= 4); \
|
|
|
|
|
lose: ; \
|
|
|
|
|
(frame_saved_regs).regs[SP_REGNUM] = (frame_info)->frame + 8; \
|
|
|
|
|
(frame_saved_regs).regs[FP_REGNUM] = (frame_info)->frame; \
|
|
|
|
|
(frame_saved_regs).regs[PC_REGNUM] = (frame_info)->frame + 4; \
|
|
|
|
|
}
|
|
|
|
|
#else /* no 68881. */
|
|
|
|
|
#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
|
|
|
|
|
{ register int regnum; \
|
|
|
|
|
register int regmask; \
|
|
|
|
|
register CORE_ADDR next_addr; \
|
|
|
|
|
register CORE_ADDR pc; \
|
|
|
|
|
bzero (&frame_saved_regs, sizeof frame_saved_regs); \
|
|
|
|
|
if ((frame_info)->pc >= (frame_info)->frame - CALL_DUMMY_LENGTH - FP_REGNUM*4 - 4 \
|
|
|
|
|
&& (frame_info)->pc <= (frame_info)->frame) \
|
|
|
|
|
{ next_addr = (frame_info)->frame; \
|
|
|
|
|
pc = (frame_info)->frame - CALL_DUMMY_LENGTH - FP_REGNUM * 4 - 4; }\
|
|
|
|
|
else \
|
|
|
|
|
{ pc = get_pc_function_start ((frame_info)->pc); \
|
|
|
|
|
/* Verify we have a link a6 instruction next; \
|
|
|
|
|
if not we lose. If we win, find the address above the saved \
|
|
|
|
|
regs using the amount of storage from the link instruction. */\
|
|
|
|
|
if (044016 == read_memory_integer (pc, 2)) \
|
|
|
|
|
next_addr = (frame_info)->frame + read_memory_integer (pc += 2, 4), pc+=4; \
|
|
|
|
|
else if (047126 == read_memory_integer (pc, 2)) \
|
|
|
|
|
next_addr = (frame_info)->frame + read_memory_integer (pc += 2, 2), pc+=2; \
|
|
|
|
|
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; \
|
|
|
|
|
} \
|
|
|
|
|
/* next should be a moveml to (sp) or -(sp) or a movl r,-(sp) */ \
|
|
|
|
|
regmask = read_memory_integer (pc + 2, 2); \
|
|
|
|
|
if (0044327 == read_memory_integer (pc, 2)) \
|
|
|
|
|
{ pc += 4; /* Regmask's low bit is for register 0, the first written */ \
|
|
|
|
|
for (regnum = 0; regnum < 16; regnum++, regmask >>= 1) \
|
|
|
|
|
if (regmask & 1) \
|
|
|
|
|
(frame_saved_regs).regs[regnum] = (next_addr += 4) - 4; } \
|
|
|
|
|
else if (0044347 == read_memory_integer (pc, 2)) \
|
|
|
|
|
{ pc += 4; /* Regmask's low bit is for register 15, the first pushed */ \
|
|
|
|
|
for (regnum = 15; regnum >= 0; regnum--, regmask >>= 1) \
|
|
|
|
|
if (regmask & 1) \
|
|
|
|
|
(frame_saved_regs).regs[regnum] = (next_addr -= 4); } \
|
1992-05-18 07:54:32 +08:00
|
|
|
|
else if (0x2f00 == (0xfff0 & read_memory_integer (pc, 2))) \
|
1991-03-29 00:28:29 +08:00
|
|
|
|
{ regnum = 0xf & read_memory_integer (pc, 2); pc += 2; \
|
|
|
|
|
(frame_saved_regs).regs[regnum] = (next_addr -= 4); } \
|
|
|
|
|
/* clrw -(sp); movw ccr,-(sp) may follow. */ \
|
|
|
|
|
if (0x426742e7 == read_memory_integer (pc, 4)) \
|
|
|
|
|
(frame_saved_regs).regs[PS_REGNUM] = (next_addr -= 4); \
|
|
|
|
|
lose: ; \
|
|
|
|
|
(frame_saved_regs).regs[SP_REGNUM] = (frame_info)->frame + 8; \
|
|
|
|
|
(frame_saved_regs).regs[FP_REGNUM] = (frame_info)->frame; \
|
|
|
|
|
(frame_saved_regs).regs[PC_REGNUM] = (frame_info)->frame + 4; \
|
|
|
|
|
}
|
|
|
|
|
#endif /* no 68881. */
|
|
|
|
|
#endif /* no FIND_FRAME_SAVED_REGS. */
|
|
|
|
|
|
1991-10-24 18:21:41 +08:00
|
|
|
|
|
|
|
|
|
/* Things needed for making the inferior call functions.
|
|
|
|
|
It seems like every m68k based machine has almost identical definitions
|
|
|
|
|
in the individual machine's configuration files. Most other cpu types
|
|
|
|
|
(mips, i386, etc) have routines in their *-tdep.c files to handle this
|
|
|
|
|
for most configurations. The m68k family should be able to do this as
|
|
|
|
|
well. These macros can still be overridden when necessary. */
|
|
|
|
|
|
1991-10-25 14:29:23 +08:00
|
|
|
|
/* The CALL_DUMMY macro is the sequence of instructions, as disassembled
|
|
|
|
|
by gdb itself:
|
|
|
|
|
|
|
|
|
|
fmovemx fp0-fp7,sp@- 0xf227 0xe0ff
|
|
|
|
|
moveml d0-a5,sp@- 0x48e7 0xfffc
|
|
|
|
|
clrw sp@- 0x4267
|
|
|
|
|
movew ccr,sp@- 0x42e7
|
|
|
|
|
|
|
|
|
|
/..* The arguments are pushed at this point by GDB;
|
1991-10-24 18:21:41 +08:00
|
|
|
|
no code is needed in the dummy for this.
|
|
|
|
|
The CALL_DUMMY_START_OFFSET gives the position of
|
|
|
|
|
the following jsr instruction. *../
|
|
|
|
|
|
1991-10-25 14:29:23 +08:00
|
|
|
|
jsr @#0x32323232 0x4eb9 0x3232 0x3232
|
|
|
|
|
addal #0x69696969,sp 0xdffc 0x6969 0x6969
|
|
|
|
|
trap #<your BPT_VECTOR number here> 0x4e4?
|
|
|
|
|
nop 0x4e71
|
|
|
|
|
|
|
|
|
|
Note this is CALL_DUMMY_LENGTH bytes (28 for the above example).
|
|
|
|
|
We actually start executing at the jsr, since the pushing of the
|
|
|
|
|
registers is done by PUSH_DUMMY_FRAME. If this were real code,
|
|
|
|
|
the arguments for the function called by the jsr would be pushed
|
|
|
|
|
between the moveml and the jsr, and we could allow it to execute through.
|
|
|
|
|
But the arguments have to be pushed by GDB after the PUSH_DUMMY_FRAME is
|
|
|
|
|
done, and we cannot allow the moveml to push the registers again lest
|
|
|
|
|
they be taken for the arguments. */
|
|
|
|
|
|
|
|
|
|
#if defined (HAVE_68881)
|
|
|
|
|
|
|
|
|
|
#define CALL_DUMMY {0xf227e0ff, 0x48e7fffc, 0x426742e7, 0x4eb93232, 0x3232dffc, 0x69696969, (0x4e404e71 | (BPT_VECTOR << 16))}
|
|
|
|
|
#define CALL_DUMMY_LENGTH 28 /* Size of CALL_DUMMY */
|
|
|
|
|
#define CALL_DUMMY_START_OFFSET 12 /* Offset to jsr instruction*/
|
|
|
|
|
|
|
|
|
|
#else
|
1991-10-24 18:21:41 +08:00
|
|
|
|
|
1991-10-25 14:29:23 +08:00
|
|
|
|
#define CALL_DUMMY {0x48e7fffc, 0x426742e7, 0x4eb93232, 0x3232dffc, 0x69696969, (0x4e404e71 | (BPT_VECTOR << 16))}
|
|
|
|
|
#define CALL_DUMMY_LENGTH 24 /* Size of CALL_DUMMY */
|
|
|
|
|
#define CALL_DUMMY_START_OFFSET 8 /* Offset to jsr instruction*/
|
1991-10-24 18:21:41 +08:00
|
|
|
|
|
1991-10-25 14:29:23 +08:00
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#endif /* HAVE_68881 */
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1991-10-24 18:21:41 +08:00
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/* Insert the specified number of args and function address
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into a call sequence of the above form stored at DUMMYNAME. */
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#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \
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1991-10-25 14:29:23 +08:00
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{ *(int *)((char *) dummyname + CALL_DUMMY_START_OFFSET + 2) = fun; \
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*(int *)((char *) dummyname + CALL_DUMMY_START_OFFSET + 8) = nargs * 4; }
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1991-10-24 18:21:41 +08:00
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/* Push an empty stack frame, to record the current PC, etc. */
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#define PUSH_DUMMY_FRAME { m68k_push_dummy_frame (); }
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* environ.h, expression.h, frame.h, gdbcmd.h, gdbcore.h,
inferior.h, language.h, signame.h, target.h, terminal.h,
tm-68k.h, tm-i386v.h, tm-sparc.h, tm-sun386.h, tm-symmetry.h,
xm-i386v.h, xm-sparc.h: Prototypes for all external functions.
Lint.
1992-02-21 09:31:56 +08:00
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extern void m68k_push_dummy_frame PARAMS ((void));
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* infrun.c, infcmd.c, breakpoint.c, main.c, symfile.c,
breakpoint.h, tm-sun4os4.h, tm-sparc.h, sparc-tdep.c, tm-mips.h,
mips-tdep.h, tm-sun3.h, tm-68k.h, m68k-tdep.h: Add support for
stepping (and nexting) through longjmp(). Also, cleanup
breakpoint handling quite a bit by creating explicit breakpoint
types instead of using magic breakpoint numbers.
Makefile.in: Update version to 4.4.3
1992-02-22 17:06:58 +08:00
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extern void m68k_pop_frame PARAMS ((void));
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1991-10-24 18:21:41 +08:00
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/* Discard from the stack the innermost frame, restoring all registers. */
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1991-10-25 14:29:23 +08:00
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#define POP_FRAME { m68k_pop_frame (); }
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1991-10-24 18:21:41 +08:00
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* infrun.c, infcmd.c, breakpoint.c, main.c, symfile.c,
breakpoint.h, tm-sun4os4.h, tm-sparc.h, sparc-tdep.c, tm-mips.h,
mips-tdep.h, tm-sun3.h, tm-68k.h, m68k-tdep.h: Add support for
stepping (and nexting) through longjmp(). Also, cleanup
breakpoint handling quite a bit by creating explicit breakpoint
types instead of using magic breakpoint numbers.
Makefile.in: Update version to 4.4.3
1992-02-22 17:06:58 +08:00
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/* Offset from SP to first arg on stack at first instruction of a function */
|
* environ.h, expression.h, frame.h, gdbcmd.h, gdbcore.h,
inferior.h, language.h, signame.h, target.h, terminal.h,
tm-68k.h, tm-i386v.h, tm-sparc.h, tm-sun386.h, tm-symmetry.h,
xm-i386v.h, xm-sparc.h: Prototypes for all external functions.
Lint.
1992-02-21 09:31:56 +08:00
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* infrun.c, infcmd.c, breakpoint.c, main.c, symfile.c,
breakpoint.h, tm-sun4os4.h, tm-sparc.h, sparc-tdep.c, tm-mips.h,
mips-tdep.h, tm-sun3.h, tm-68k.h, m68k-tdep.h: Add support for
stepping (and nexting) through longjmp(). Also, cleanup
breakpoint handling quite a bit by creating explicit breakpoint
types instead of using magic breakpoint numbers.
Makefile.in: Update version to 4.4.3
1992-02-22 17:06:58 +08:00
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#define SP_ARG0 (1 * 4)
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