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,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #define HOST_BYTE_ORDER BIG_ENDIAN
  22
  23 #include <sys/param.h>          /* For INT_MIN */
  24
  25 #define HAVE_WAIT_STRUCT
  26
  27 /* We can't use "isatty" or "fileno" on this machine.  This isn't good,
  28    but it will have to do.  */
  29 #define ISATTY(FP)      ((FP) == stdin || (FP) == stdout)
  30
  31 /* THis is the amount to subtract from u.u_ar0
  32    to get the offset in the core file of the register values. */
  33
  34 #define KERNEL_U_ADDR UADDR
  35
  36 /* The offsets in this macro are from /usr/include/machine/reg.h */
  37
  38 #define REGISTER_U_ADDR(addr, blockend, regno)          \
  39 {   static char offsets[] = { \
  40         /*d0-d7:*/1,2,3,4,5,6,7,8, \
  41         /*a0-a6:*/9,10,11,12,13,14,15, /*sp:*/-4, /*ps:*/0, /*pc:*/-1, \
  42         /*fp0-fp7:*/19,22,25,28,31,34,37,40, /*fpc:*/16,17,18 }; \
  43         addr = blockend + 4 * offsets[regno]; \
  44 }
  45
  46 /* NewsOS 3.3 does not define errno in <errno.h>.  */
  47 extern int errno;
  48 \f
  49 /* Interface definitions for kernel debugger KDB.  */
  50
  51 /* Use GNU assembler instead of standard assembler */
  52 #define USE_GAS
  53
  54 /* Motorola assembly format */
  55 #ifndef USE_GAS
  56 #define MOTOROLA
  57 #endif
  58
  59 /* Map machine fault codes into signal numbers.
  60    First subtract 0, divide by 4, then index in a table.
  61    Faults for which the entry in this table is 0
  62    are not handled by KDB; the program's own trap handler
  63    gets to handle then.  */
  64
  65 #define FAULT_CODE_ORIGIN 0
  66 #define FAULT_CODE_UNITS 4
  67 #define FAULT_TABLE    \
  68 { 0, 0, 0, 0, SIGTRAP, 0, 0, 0, \
  69   0, SIGTRAP, 0, 0, 0, 0, 0, SIGKILL, \
  70   0, 0, 0, 0, 0, 0, 0, 0, \
  71   SIGILL }
  72
  73 /* Start running with a stack stretching from BEG to END.
  74    BEG and END should be symbols meaningful to the assembler.
  75    This is used only for kdb.  */
  76
  77 #ifdef MOTOROLA
  78 #define INIT_STACK(beg, end)  \
  79 { asm (".globl end");         \
  80   asm ("move.l $ end, sp");      \
  81   asm ("clr.l fp"); }
  82 #else
  83 #define INIT_STACK(beg, end)  \
  84 { asm (".globl end");         \
  85   asm ("movel $ end, sp");      \
  86   asm ("clrl fp"); }
  87 #endif
  88
  89 /* Push the frame pointer register on the stack.  */
  90 #ifdef MOTOROLA
  91 #define PUSH_FRAME_PTR        \
  92   asm ("move.l fp, -(sp)");
  93 #else
  94 #define PUSH_FRAME_PTR        \
  95   asm ("movel fp, -(sp)");
  96 #endif
  97
  98 /* Copy the top-of-stack to the frame pointer register.  */
  99 #ifdef MOTOROLA
 100 #define POP_FRAME_PTR  \
 101   asm ("move.l (sp), fp");
 102 #else
 103 #define POP_FRAME_PTR  \
 104   asm ("movl (sp), fp");
 105 #endif
 106
 107 /* After KDB is entered by a fault, push all registers
 108    that GDB thinks about (all NUM_REGS of them),
 109    so that they appear in order of ascending GDB register number.
 110    The fault code will be on the stack beyond the last register.  */
 111
 112 #ifdef MOTOROLA
 113 #define PUSH_REGISTERS        \
 114 { asm ("clr.w -(sp)");        \
 115   asm ("pea (10,sp)");        \
 116   asm ("movem $ 0xfffe,-(sp)"); }
 117 #else
 118 #define PUSH_REGISTERS        \
 119 { asm ("clrw -(sp)");         \
 120   asm ("pea 10(sp)");         \
 121   asm ("movem $ 0xfffe,-(sp)"); }
 122 #endif
 123
 124 /* Assuming the registers (including processor status) have been
 125    pushed on the stack in order of ascending GDB register number,
 126    restore them and return to the address in the saved PC register.  */
 127
 128 #ifdef MOTOROLA
 129 #define POP_REGISTERS          \
 130 { asm ("subi.l $8,28(sp)");     \
 131   asm ("movem (sp),$ 0xffff"); \
 132   asm ("rte"); }
 133 #else
 134 #define POP_REGISTERS          \
 135 { asm ("subil $8,28(sp)");     \
 136   asm ("movem (sp),$ 0xffff"); \
 137   asm ("rte"); }
 138 #endif