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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20 #define HOST_BYTE_ORDER BIG_ENDIAN
  21
  22 /* A News 1800 running NEWS-OS Release 4.0.1C is said to need this.  */
  23 /* Avoid "INT_MIN redefined" preprocessor warnings by defining them here.  */
  24 #include <sys/param.h>
  25
  26 #define HAVE_WAIT_STRUCT
  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 3.3 does not define errno in <errno.h>.  */
  48 extern int errno;
  49 \f
  50 /* Interface definitions for kernel debugger KDB.  */
  51
  52 /* Use GNU assembler instead of standard assembler */
  53 #define USE_GAS
  54
  55 /* Motorola assembly format */
  56 #ifndef USE_GAS
  57 #define MOTOROLA
  58 #endif
  59
  60 /* Map machine fault codes into signal numbers.
  61    First subtract 0, divide by 4, then index in a table.
  62    Faults for which the entry in this table is 0
  63    are not handled by KDB; the program's own trap handler
  64    gets to handle then.  */
  65
  66 #define FAULT_CODE_ORIGIN 0
  67 #define FAULT_CODE_UNITS 4
  68 #define FAULT_TABLE    \
  69 { 0, 0, 0, 0, SIGTRAP, 0, 0, 0, \
  70   0, SIGTRAP, 0, 0, 0, 0, 0, SIGKILL, \
  71   0, 0, 0, 0, 0, 0, 0, 0, \
  72   SIGILL }
  73
  74 /* Start running with a stack stretching from BEG to END.
  75    BEG and END should be symbols meaningful to the assembler.
  76    This is used only for kdb.  */
  77
  78 #ifdef MOTOROLA
  79 #define INIT_STACK(beg, end)  \
  80 { asm (".globl end");         \
  81   asm ("move.l $ end, sp");      \
  82   asm ("clr.l fp"); }
  83 #else
  84 #define INIT_STACK(beg, end)  \
  85 { asm (".globl end");         \
  86   asm ("movel $ end, sp");      \
  87   asm ("clrl fp"); }
  88 #endif
  89
  90 /* Push the frame pointer register on the stack.  */
  91 #ifdef MOTOROLA
  92 #define PUSH_FRAME_PTR        \
  93   asm ("move.l fp, -(sp)");
  94 #else
  95 #define PUSH_FRAME_PTR        \
  96   asm ("movel fp, -(sp)");
  97 #endif
  98
  99 /* Copy the top-of-stack to the frame pointer register.  */
 100 #ifdef MOTOROLA
 101 #define POP_FRAME_PTR  \
 102   asm ("move.l (sp), fp");
 103 #else
 104 #define POP_FRAME_PTR  \
 105   asm ("movl (sp), fp");
 106 #endif
 107
 108 /* After KDB is entered by a fault, push all registers
 109    that GDB thinks about (all NUM_REGS of them),
 110    so that they appear in order of ascending GDB register number.
 111    The fault code will be on the stack beyond the last register.  */
 112
 113 #ifdef MOTOROLA
 114 #define PUSH_REGISTERS        \
 115 { asm ("clr.w -(sp)");        \
 116   asm ("pea (10,sp)");        \
 117   asm ("movem $ 0xfffe,-(sp)"); }
 118 #else
 119 #define PUSH_REGISTERS        \
 120 { asm ("clrw -(sp)");         \
 121   asm ("pea 10(sp)");         \
 122   asm ("movem $ 0xfffe,-(sp)"); }
 123 #endif
 124
 125 /* Assuming the registers (including processor status) have been
 126    pushed on the stack in order of ascending GDB register number,
 127    restore them and return to the address in the saved PC register.  */
 128
 129 #ifdef MOTOROLA
 130 #define POP_REGISTERS          \
 131 { asm ("subi.l $8,28(sp)");     \
 132   asm ("movem (sp),$ 0xffff"); \
 133   asm ("rte"); }
 134 #else
 135 #define POP_REGISTERS          \
 136 { asm ("subil $8,28(sp)");     \
 137   asm ("movem (sp),$ 0xffff"); \
 138   asm ("rte"); }
 139 #endif