136 lines
4.4 KiB
C
136 lines
4.4 KiB
C
/* Definitions to make GDB hosted on a tahoe running 4.3-Reno
|
|
Copyright (C) 1986, 1987, 1989, 1991 Free Software Foundation, Inc.
|
|
Contributed by the State University of New York at Buffalo, by the
|
|
Distributed Computer Systems Lab, Department of Computer Science, 1991.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program 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 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program 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 this program; if not, write to the Free Software
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
|
|
|
/* Make sure the system include files define BIG_ENDIAN, UINT_MAX, const,
|
|
etc, rather than GDB's files. */
|
|
#include <stdio.h>
|
|
#include <sys/param.h>
|
|
|
|
/* Host is big-endian */
|
|
|
|
#define HOST_BYTE_ORDER BIG_ENDIAN
|
|
|
|
/* Get rid of any system-imposed stack limit if possible. */
|
|
|
|
#define SET_STACK_LIMIT_HUGE
|
|
|
|
#define REGISTER_U_ADDR(addr, blockend, regno) \
|
|
{ addr = blockend - 100 + regno * 4; \
|
|
if (regno == PC_REGNUM) addr = blockend - 8; \
|
|
if (regno == PS_REGNUM) addr = blockend - 4; \
|
|
if (regno == FP_REGNUM) addr = blockend - 40; \
|
|
if (regno == SP_REGNUM) addr = blockend - 36; \
|
|
if (regno == AL_REGNUM) addr = blockend - 20; \
|
|
if (regno == AH_REGNUM) addr = blockend - 24;}
|
|
|
|
/* Interface definitions for kernel debugger KDB. */
|
|
|
|
/* Map machine fault codes into signal numbers.
|
|
First subtract 0, divide by 4, then index in a table.
|
|
Faults for which the entry in this table is 0
|
|
are not handled by KDB; the program's own trap handler
|
|
gets to handle then. */
|
|
|
|
#define FAULT_CODE_ORIGIN 0
|
|
#define FAULT_CODE_UNITS 4
|
|
#define FAULT_TABLE \
|
|
{ 0, SIGKILL, SIGSEGV, 0, 0, 0, 0, 0, \
|
|
0, 0, SIGTRAP, SIGTRAP, 0, 0, 0, 0, \
|
|
0, 0, 0, 0, 0, 0, 0, 0}
|
|
|
|
/* Start running with a stack stretching from BEG to END.
|
|
BEG and END should be symbols meaningful to the assembler.
|
|
This is used only for kdb. */
|
|
|
|
#define INIT_STACK(beg, end) \
|
|
{ asm (".globl end"); \
|
|
asm ("movl $ end, sp"); \
|
|
asm ("clrl fp"); }
|
|
|
|
/* Push the frame pointer register on the stack. */
|
|
|
|
#define PUSH_FRAME_PTR \
|
|
asm ("pushl fp");
|
|
|
|
/* Copy the top-of-stack to the frame pointer register. */
|
|
|
|
#define POP_FRAME_PTR \
|
|
asm ("movl (sp), fp");
|
|
|
|
/* After KDB is entered by a fault, push all registers
|
|
that GDB thinks about (all NUM_REGS of them),
|
|
so that they appear in order of ascending GDB register number.
|
|
The fault code will be on the stack beyond the last register. */
|
|
|
|
#define PUSH_REGISTERS \
|
|
{ asm ("pushl 8(sp)"); \
|
|
asm ("pushl 8(sp)"); \
|
|
asm ("pushal 0x41(sp)"); \
|
|
asm ("pushl r0" ); \
|
|
asm ("pushl r1" ); \
|
|
asm ("pushl r2" ); \
|
|
asm ("pushl r3" ); \
|
|
asm ("pushl r4" ); \
|
|
asm ("pushl r5" ); \
|
|
asm ("pushl r6" ); \
|
|
asm ("pushl r7" ); \
|
|
asm ("pushl r8" ); \
|
|
asm ("pushl r9" ); \
|
|
asm ("pushl r10" ); \
|
|
asm ("pushl r11" ); \
|
|
asm ("pushl r12" ); \
|
|
asm ("pushl fp" ); \
|
|
asm ("pushl sp" ); \
|
|
asm ("pushl pc" ); \
|
|
asm ("pushl ps" ); \
|
|
asm ("pushl aclo" ); \
|
|
asm ("pushl achi" ); \
|
|
}
|
|
|
|
/* Assuming the registers (including processor status) have been
|
|
pushed on the stack in order of ascending GDB register number,
|
|
restore them and return to the address in the saved PC register. */
|
|
|
|
#define POP_REGISTERS \
|
|
{ \
|
|
asm ("movl (sp)+, achi"); \
|
|
asm ("movl (sp)+, aclo"); \
|
|
asm ("movl (sp)+, ps"); \
|
|
asm ("movl (sp)+, pc"); \
|
|
asm ("movl (sp)+, sp"); \
|
|
asm ("movl (sp)+, fp"); \
|
|
asm ("movl (sp)+, r12"); \
|
|
asm ("movl (sp)+, r11"); \
|
|
asm ("movl (sp)+, r10"); \
|
|
asm ("movl (sp)+, r9"); \
|
|
asm ("movl (sp)+, r8"); \
|
|
asm ("movl (sp)+, r7"); \
|
|
asm ("movl (sp)+, r6"); \
|
|
asm ("movl (sp)+, r5"); \
|
|
asm ("movl (sp)+, r4"); \
|
|
asm ("movl (sp)+, r3"); \
|
|
asm ("movl (sp)+, r2"); \
|
|
asm ("movl (sp)+, r1"); \
|
|
asm ("movl (sp)+, r0"); \
|
|
asm ("subl2 $8,(sp)"); \
|
|
asm ("movl (sp),sp"); \
|
|
asm ("rei"); }
|