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