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 #include <sys/param.h>  /* For INT_MIN */
  23
  24 #define HAVE_WAIT_STRUCT
  25
  26 /* We can't use "isatty" or "fileno" on this machine.  This isn't good,
  27    but it will have to do.  */
  28 #define ISATTY(FP)      ((FP) == stdin || (FP) == stdout)
  29
  30 /* THis is the amount to subtract from u.u_ar0
  31    to get the offset in the core file of the register values. */
  32
  33 #define KERNEL_U_ADDR UADDR
  34
  35 /* The offsets in this macro are from /usr/include/machine/reg.h */
  36
  37 #define REGISTER_U_ADDR(addr, blockend, regno)          \
  38 {   static char offsets[] = { \
  39         /*d0-d7:*/1,2,3,4,5,6,7,8, \
  40         /*a0-a6:*/9,10,11,12,13,14,15, /*sp:*/-4, /*ps:*/0, /*pc:*/-1, \
  41         /*fp0-fp7:*/19,22,25,28,31,34,37,40, /*fpc:*/16,17,18 }; \
  42         addr = blockend + 4 * offsets[regno]; \
  43 }
  44
  45 /* NewsOS 3.3 does not define errno in <errno.h>.  */
  46 extern int errno;
  47 \f
  48 /* Interface definitions for kernel debugger KDB.  */
  49
  50 /* Use GNU assembler instead of standard assembler */
  51 #define USE_GAS
  52
  53 /* Motorola assembly format */
  54 #ifndef USE_GAS
  55 #define MOTOROLA
  56 #endif
  57
  58 /* Map machine fault codes into signal numbers.
  59    First subtract 0, divide by 4, then index in a table.
  60    Faults for which the entry in this table is 0
  61    are not handled by KDB; the program's own trap handler
  62    gets to handle then.  */
  63
  64 #define FAULT_CODE_ORIGIN 0
  65 #define FAULT_CODE_UNITS 4
  66 #define FAULT_TABLE    \
  67 { 0, 0, 0, 0, SIGTRAP, 0, 0, 0, \
  68   0, SIGTRAP, 0, 0, 0, 0, 0, SIGKILL, \
  69   0, 0, 0, 0, 0, 0, 0, 0, \
  70   SIGILL }
  71
  72 /* Start running with a stack stretching from BEG to END.
  73    BEG and END should be symbols meaningful to the assembler.
  74    This is used only for kdb.  */
  75
  76 #ifdef MOTOROLA
  77 #define INIT_STACK(beg, end)  \
  78 { asm (".globl end");         \
  79   asm ("move.l $ end, sp");      \
  80   asm ("clr.l fp"); }
  81 #else
  82 #define INIT_STACK(beg, end)  \
  83 { asm (".globl end");         \
  84   asm ("movel $ end, sp");      \
  85   asm ("clrl fp"); }
  86 #endif
  87
  88 /* Push the frame pointer register on the stack.  */
  89 #ifdef MOTOROLA
  90 #define PUSH_FRAME_PTR        \
  91   asm ("move.l fp, -(sp)");
  92 #else
  93 #define PUSH_FRAME_PTR        \
  94   asm ("movel fp, -(sp)");
  95 #endif
  96
  97 /* Copy the top-of-stack to the frame pointer register.  */
  98 #ifdef MOTOROLA
  99 #define POP_FRAME_PTR  \
 100   asm ("move.l (sp), fp");
 101 #else
 102 #define POP_FRAME_PTR  \
 103   asm ("movl (sp), fp");
 104 #endif
 105
 106 /* After KDB is entered by a fault, push all registers
 107    that GDB thinks about (all NUM_REGS of them),
 108    so that they appear in order of ascending GDB register number.
 109    The fault code will be on the stack beyond the last register.  */
 110
 111 #ifdef MOTOROLA
 112 #define PUSH_REGISTERS        \
 113 { asm ("clr.w -(sp)");        \
 114   asm ("pea (10,sp)");        \
 115   asm ("movem $ 0xfffe,-(sp)"); }
 116 #else
 117 #define PUSH_REGISTERS        \
 118 { asm ("clrw -(sp)");         \
 119   asm ("pea 10(sp)");         \
 120   asm ("movem $ 0xfffe,-(sp)"); }
 121 #endif
 122
 123 /* Assuming the registers (including processor status) have been
 124    pushed on the stack in order of ascending GDB register number,
 125    restore them and return to the address in the saved PC register.  */
 126
 127 #ifdef MOTOROLA
 128 #define POP_REGISTERS          \
 129 { asm ("subi.l $8,28(sp)");     \
 130   asm ("movem (sp),$ 0xffff"); \
 131   asm ("rte"); }
 132 #else
 133 #define POP_REGISTERS          \
 134 { asm ("subil $8,28(sp)");     \
 135   asm ("movem (sp),$ 0xffff"); \
 136   asm ("rte"); }
 137 #endif