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99 lines
3.4 KiB
C
99 lines
3.4 KiB
C
/* Definitions to make GDB run on a vax under 4.2bsd.
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Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc.
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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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/* We have to include these files now, so that GDB will not make
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competing definitions in defs.h. */
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#include <machine/endian.h>
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#include <machine/limits.h>
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#define HOST_BYTE_ORDER LITTLE_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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/* This is the amount to subtract from u.u_ar0
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to get the offset in the core file of the register values. */
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#define KERNEL_U_ADDR (0x80000000 - (UPAGES * NBPG))
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#define REGISTER_U_ADDR(addr, blockend, regno) \
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{ addr = blockend - 0110 + 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 - 0120; \
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if (regno == AP_REGNUM) addr = blockend - 0124; \
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if (regno == SP_REGNUM) addr = blockend - 20; }
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/* Kernel is a bit tenacious about sharing text segments, disallowing bpts. */
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#define ONE_PROCESS_WRITETEXT
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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 0x14(sp)"); \
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asm ("pushr $037777"); }
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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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{ asm ("popr $037777"); \
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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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