mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-15 21:33:29 +08:00
121 lines
4.5 KiB
C
121 lines
4.5 KiB
C
/* Parameters for execution on a Sun, for GDB, the GNU debugger.
|
||
Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
GDB is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 1, or (at your option)
|
||
any later version.
|
||
|
||
GDB is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with GDB; see the file COPYING. If not, write to
|
||
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
|
||
|
||
#define HAVE_68881
|
||
|
||
#include "tm-68k.h"
|
||
|
||
/* Define this if the C compiler puts an underscore at the front
|
||
of external names before giving them to the linker. */
|
||
|
||
#define NAMES_HAVE_UNDERSCORE
|
||
|
||
/* Debugger information will be in DBX format. */
|
||
|
||
#define READ_DBX_FORMAT
|
||
|
||
/* Address of the end of stack space. We get this from the system
|
||
include files. */
|
||
#include <sys/types.h>
|
||
#include <machine/vmparam.h>
|
||
#define STACK_END_ADDR USRSTACK
|
||
|
||
/* Things needed for making the inferior call functions. */
|
||
|
||
/* Push an empty stack frame, to record the current PC, etc. */
|
||
|
||
#define PUSH_DUMMY_FRAME \
|
||
{ 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); \
|
||
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. */
|
||
|
||
#define POP_FRAME \
|
||
{ register FRAME frame = get_current_frame (); \
|
||
register CORE_ADDR fp; \
|
||
register int regnum; \
|
||
struct frame_saved_regs fsr; \
|
||
struct frame_info *fi; \
|
||
char raw_buffer[12]; \
|
||
fi = get_frame_info (frame); \
|
||
fp = fi->frame; \
|
||
get_frame_saved_regs (fi, &fsr); \
|
||
for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--) \
|
||
if (fsr.regs[regnum]) \
|
||
{ read_memory (fsr.regs[regnum], raw_buffer, 12); \
|
||
write_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 12); }\
|
||
for (regnum = FP_REGNUM - 1; regnum >= 0; regnum--) \
|
||
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 (); \
|
||
set_current_frame (create_new_frame (read_register (FP_REGNUM), \
|
||
read_pc ())); }
|
||
|
||
/* This sequence of words is the instructions
|
||
fmovem 0xff,-(sp)
|
||
moveml 0xfffc,-(sp)
|
||
clrw -(sp)
|
||
movew ccr,-(sp)
|
||
/..* The arguments are pushed at this point by GDB;
|
||
no code is needed in the dummy for this.
|
||
The CALL_DUMMY_START_OFFSET gives the position of
|
||
the following jsr instruction. *../
|
||
jsr @#32323232
|
||
addl #69696969,sp
|
||
trap #15
|
||
nop
|
||
Note this is 28 bytes.
|
||
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. */
|
||
|
||
#define CALL_DUMMY {0xf227e0ff, 0x48e7fffc, 0x426742e7, 0x4eb93232, 0x3232dffc, 0x69696969, 0x4e4f4e71}
|
||
|
||
#define CALL_DUMMY_LENGTH 28
|
||
|
||
#define CALL_DUMMY_START_OFFSET 12
|
||
|
||
/* Insert the specified number of args and function address
|
||
into a call sequence of the above form stored at DUMMYNAME. */
|
||
|
||
#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \
|
||
{ *(int *)((char *) dummyname + 20) = nargs * 4; \
|
||
*(int *)((char *) dummyname + 14) = fun; }
|