gdb/xm-np1.h

   1 /* Parameters for execution on a Gould NP1, for GDB, the GNU debugger.
   2    Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc.
   3
   4 This file is part of GDB.
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 #define HOST_BYTE_ORDER BIG_ENDIAN
  21
  22 /* Get rid of any system-imposed stack limit if possible.  */
  23 #define SET_STACK_LIMIT_HUGE
  24
  25 /* Address of U in kernel space */
  26 #define KERNEL_U_ADDR           0x7fffc000
  27
  28 /* This is a piece of magic that is given a register number REGNO
  29    and as BLOCKEND the address in the system of the end of the user structure
  30    and stores in ADDR the address in the kernel or core dump
  31    of that register. */
  32 #define REGISTER_U_ADDR(addr, blockend, regno) {                        \
  33         addr = blockend + regno * 4;                                    \
  34         if (regno == VE_REGNUM) addr = blockend - 9 * 4;                \
  35         if (regno == PC_REGNUM) addr = blockend - 8 * 4;                \
  36         if (regno == PS_REGNUM) addr = blockend - 7 * 4;                \
  37         if (regno == FP_REGNUM) addr = blockend - 6 * 4;                \
  38         if (regno >= V1_REGNUM)                                         \
  39             addr = blockend + 16 * 4 + (regno - V1_REGNUM) * VR_SIZE;   \
  40 }
  41
  42 /* Don't try to write the frame pointer.  */
  43 #define CANNOT_STORE_REGISTER(regno) ((regno) == FP_REGNUM)
  44
  45 #define MISSING_VPRINTF
  46 \f
  47 /*
  48  * No KDB support, Yet! */
  49 /* Interface definitions for kernel debugger KDB.  */
  50
  51 /* Map machine fault codes into signal numbers.
  52    First subtract 0, divide by 4, then index in a table.
  53    Faults for which the entry in this table is 0
  54    are not handled by KDB; the program's own trap handler
  55    gets to handle then.  */
  56
  57 #define FAULT_CODE_ORIGIN 0
  58 #define FAULT_CODE_UNITS 4
  59 #define FAULT_TABLE    \
  60 { 0, 0, 0, 0, SIGTRAP, 0, 0, 0, \
  61   0, SIGTRAP, 0, 0, 0, 0, 0, SIGKILL, \
  62   0, 0, 0, 0, 0, 0, 0, 0, \
  63   SIGILL }
  64
  65 /* Start running with a stack stretching from BEG to END.
  66    BEG and END should be symbols meaningful to the assembler.
  67    This is used only for kdb.  */
  68
  69 #define INIT_STACK(beg, end)  \
  70 { asm (".globl end");         \
  71   asm ("movel $ end, sp");      \
  72   asm ("clrl fp"); }
  73
  74 /* Push the frame pointer register on the stack.  */
  75 #define PUSH_FRAME_PTR        \
  76   asm ("movel fp, -(sp)");
  77
  78 /* Copy the top-of-stack to the frame pointer register.  */
  79 #define POP_FRAME_PTR  \
  80   asm ("movl (sp), fp");
  81
  82 /* After KDB is entered by a fault, push all registers
  83    that GDB thinks about (all NUM_REGS of them),
  84    so that they appear in order of ascending GDB register number.
  85    The fault code will be on the stack beyond the last register.  */
  86
  87 #define PUSH_REGISTERS        \
  88 { asm ("clrw -(sp)");         \
  89   asm ("pea 10(sp)");         \
  90   asm ("movem $ 0xfffe,-(sp)"); }
  91
  92 /* Assuming the registers (including processor status) have been
  93    pushed on the stack in order of ascending GDB register number,
  94    restore them and return to the address in the saved PC register.  */
  95
  96 #define POP_REGISTERS          \
  97 { asm ("subil $8,28(sp)");     \
  98   asm ("movem (sp),$ 0xffff"); \
  99   asm ("rte"); }