gdb/config/m68k/xm-news.h

   1 /* Parameters for execution on a Sony/NEWS, for GDB, the GNU debugger.
   2    Copyright 1987, 1989, 1992 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 #define HAVE_WAIT_STRUCT
  23
  24 /* Get rid of any system-imposed stack limit if possible.  */
  25
  26 #define SET_STACK_LIMIT_HUGE
  27
  28 /* We can't use "isatty" or "fileno" on this machine.  This isn't good,
  29    but it will have to do.  */
  30 #define ISATTY(FP)      ((FP) == stdin || (FP) == stdout)
  31
  32 /* THis is the amount to subtract from u.u_ar0
  33    to get the offset in the core file of the register values. */
  34
  35 #define KERNEL_U_ADDR UADDR
  36
  37 /* The offsets in this macro are from /usr/include/machine/reg.h */
  38
  39 #define REGISTER_U_ADDR(addr, blockend, regno)          \
  40 {   static char offsets[] = { \
  41         /*d0-d7:*/1,2,3,4,5,6,7,8, \
  42         /*a0-a6:*/9,10,11,12,13,14,15, /*sp:*/-4, /*ps:*/0, /*pc:*/-1, \
  43         /*fp0-fp7:*/19,22,25,28,31,34,37,40, /*fpc:*/16,17,18 }; \
  44         addr = blockend + 4 * offsets[regno]; \
  45 }
  46
  47 /* NewsOS 3 apparently dies on large alloca's -- roland@ai.mit.edu.  */
  48 #define BROKEN_LARGE_ALLOCA
  49
  50 \f
  51 /* Interface definitions for kernel debugger KDB.  */
  52
  53 /* Use GNU assembler instead of standard assembler */
  54 #define USE_GAS
  55
  56 /* Motorola assembly format */
  57 #ifndef USE_GAS
  58 #define MOTOROLA
  59 #endif
  60
  61 /* Map machine fault codes into signal numbers.
  62    First subtract 0, divide by 4, then index in a table.
  63    Faults for which the entry in this table is 0
  64    are not handled by KDB; the program's own trap handler
  65    gets to handle then.  */
  66
  67 #define FAULT_CODE_ORIGIN 0
  68 #define FAULT_CODE_UNITS 4
  69 #define FAULT_TABLE    \
  70 { 0, 0, 0, 0, SIGTRAP, 0, 0, 0, \
  71   0, SIGTRAP, 0, 0, 0, 0, 0, SIGKILL, \
  72   0, 0, 0, 0, 0, 0, 0, 0, \
  73   SIGILL }
  74
  75 /* Start running with a stack stretching from BEG to END.
  76    BEG and END should be symbols meaningful to the assembler.
  77    This is used only for kdb.  */
  78
  79 #ifdef MOTOROLA
  80 #define INIT_STACK(beg, end)  \
  81 { asm (".globl end");         \
  82   asm ("move.l $ end, sp");      \
  83   asm ("clr.l fp"); }
  84 #else
  85 #define INIT_STACK(beg, end)  \
  86 { asm (".globl end");         \
  87   asm ("movel $ end, sp");      \
  88   asm ("clrl fp"); }
  89 #endif
  90
  91 /* Push the frame pointer register on the stack.  */
  92 #ifdef MOTOROLA
  93 #define PUSH_FRAME_PTR        \
  94   asm ("move.l fp, -(sp)");
  95 #else
  96 #define PUSH_FRAME_PTR        \
  97   asm ("movel fp, -(sp)");
  98 #endif
  99
 100 /* Copy the top-of-stack to the frame pointer register.  */
 101 #ifdef MOTOROLA
 102 #define POP_FRAME_PTR  \
 103   asm ("move.l (sp), fp");
 104 #else
 105 #define POP_FRAME_PTR  \
 106   asm ("movl (sp), fp");
 107 #endif
 108
 109 /* After KDB is entered by a fault, push all registers
 110    that GDB thinks about (all NUM_REGS of them),
 111    so that they appear in order of ascending GDB register number.
 112    The fault code will be on the stack beyond the last register.  */
 113
 114 #ifdef MOTOROLA
 115 #define PUSH_REGISTERS        \
 116 { asm ("clr.w -(sp)");        \
 117   asm ("pea (10,sp)");        \
 118   asm ("movem $ 0xfffe,-(sp)"); }
 119 #else
 120 #define PUSH_REGISTERS        \
 121 { asm ("clrw -(sp)");         \
 122   asm ("pea 10(sp)");         \
 123   asm ("movem $ 0xfffe,-(sp)"); }
 124 #endif
 125
 126 /* Assuming the registers (including processor status) have been
 127    pushed on the stack in order of ascending GDB register number,
 128    restore them and return to the address in the saved PC register.  */
 129
 130 #ifdef MOTOROLA
 131 #define POP_REGISTERS          \
 132 { asm ("subi.l $8,28(sp)");     \
 133   asm ("movem (sp),$ 0xffff"); \
 134   asm ("rte"); }
 135 #else
 136 #define POP_REGISTERS          \
 137 { asm ("subil $8,28(sp)");     \
 138   asm ("movem (sp),$ 0xffff"); \
 139   asm ("rte"); }
 140 #endif