120 lines
4.2 KiB
C
120 lines
4.2 KiB
C
/* Definitions to make GDB run on a merlin under utek 2.1
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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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/* This machine doesn't have the siginterrupt call. */
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#define NO_SIGINTERRUPT
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/* Under Utek, a ptrace'd process can be the only active process for
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an executable. Therefore instead of /bin/sh use gdb-sh (which should
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just be a copy of /bin/sh which is world readable and writeable). */
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#define SHELL_FILE "/usr/gnu/lib/gdb-sh"
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#define HOST_BYTE_ORDER LITTLE_ENDIAN
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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 (0xfef000)
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#define REGISTER_U_ADDR(addr, blockend, regno) \
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{ \
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switch (regno) { \
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case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: \
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addr = blockend + (R0 - regno) * sizeof (int); break; \
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case PC_REGNUM: \
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addr = blockend + PC * sizeof (int); break; \
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case SP_REGNUM: \
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addr = blockend + SP * sizeof (int); break; \
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case FP_REGNUM: \
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addr = blockend + FP * sizeof (int); break; \
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case PS_REGNUM: \
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addr = blockend + 12 * sizeof (int); break; \
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case FPS_REGNUM: \
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addr = 108; break; \
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case FP0_REGNUM + 0: case FP0_REGNUM + 1: \
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case FP0_REGNUM + 2: case FP0_REGNUM + 3: \
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case FP0_REGNUM + 4: case FP0_REGNUM + 5: \
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case FP0_REGNUM + 6: case FP0_REGNUM + 7: \
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addr = 76 + (regno - FP0_REGNUM) * sizeof (float); break; \
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case LP0_REGNUM + 0: case LP0_REGNUM + 1: \
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case LP0_REGNUM + 2: case LP0_REGNUM + 3: \
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addr = 76 + (regno - LP0_REGNUM) * sizeof (double); break; \
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default: \
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printf ("bad argument to REGISTER_U_ADDR %d\n", regno); \
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abort (); \
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} \
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}
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/* Compensate for lack of `vprintf' function. */
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#define MISSING_VPRINTF
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#if 0
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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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#endif /* 0 */
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