gdb/config/i386/xm-symmetry.h

   1 /* Definitions to make GDB run on a Sequent Symmetry under
   2    dynix 3.1 and ptx 1.3, with Weitek 1167 and i387 support.
   3    Copyright 1986, 1987, 1989, 1992, 1993  Free Software Foundation, Inc.
   4
   5 This file is part of GDB.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  20
  21 /* Symmetry version by Jay Vosburgh (fubar@sequent.com) */
  22
  23 /* This machine doesn't have the siginterrupt call.  */
  24 #define NO_SIGINTERRUPT
  25
  26 #define HAVE_WAIT_STRUCT
  27
  28 #ifdef _SEQUENT_
  29 /* ptx */
  30 #define HAVE_TERMIO
  31 #define USG
  32 #else
  33 /* dynix */
  34
  35 /* Get rid of any system-imposed stack limit if possible.  */
  36
  37 #define SET_STACK_LIMIT_HUGE
  38
  39 #endif
  40
  41 /* XPT_DEBUG doesn't work yet under Dynix 3.0.12, but UNDEBUG does... */
  42 /* #define PTRACE_ATTACH XPT_DEBUG
  43 #define PTRACE_DETACH XPT_UNDEBUG
  44 #define ATTACH_DETACH  */
  45
  46 #define HOST_BYTE_ORDER LITTLE_ENDIAN
  47
  48 /* We must fetch all the regs before storing, since we store all at once.  */
  49
  50 #define CHILD_PREPARE_TO_STORE() read_register_bytes (0, NULL, REGISTER_BYTES)
  51 \f
  52 /* Interface definitions for kernel debugger KDB.  */
  53 /* This doesn't work... */
  54 /* Map machine fault codes into signal numbers.
  55    First subtract 0, divide by 4, then index in a table.
  56    Faults for which the entry in this table is 0
  57    are not handled by KDB; the program's own trap handler
  58    gets to handle then.  */
  59
  60 #define FAULT_CODE_ORIGIN 0
  61 #define FAULT_CODE_UNITS 4
  62 #define FAULT_TABLE    \
  63 { 0, SIGKILL, SIGSEGV, 0, 0, 0, 0, 0, \
  64   0, 0, SIGTRAP, SIGTRAP, 0, 0, 0, 0, \
  65   0, 0, 0, 0, 0, 0, 0, 0}
  66
  67 /* Start running with a stack stretching from BEG to END.
  68    BEG and END should be symbols meaningful to the assembler.
  69    This is used only for kdb.  */
  70
  71 #define INIT_STACK(beg, end)  \
  72 { asm (".globl end");         \
  73   asm ("movl $ end, %esp");      \
  74   asm ("movl %ebp, $0"); }
  75
  76 /* Push the frame pointer register on the stack.  */
  77 #define PUSH_FRAME_PTR        \
  78   asm ("pushl %ebp");
  79
  80 /* Copy the top-of-stack to the frame pointer register.  */
  81 #define POP_FRAME_PTR  \
  82   asm ("movl (%esp), %ebp");
  83
  84 /* After KDB is entered by a fault, push all registers
  85    that GDB thinks about (all NUM_REGS of them),
  86    so that they appear in order of ascending GDB register number.
  87    The fault code will be on the stack beyond the last register.  */
  88
  89 #define PUSH_REGISTERS        \
  90 { asm("pushad"); }
  91 /*
  92 { asm("pushl %eax"); \
  93   asm("pushl %edx"); \
  94   asm("pushl %ecx"); \
  95   asm("pushl %st(0)"); \
  96   asm("pushl %st(1)"); \
  97   asm("pushl %ebx"); \
  98   asm("pushl %esi"); \
  99   asm("pushl %edi"); \
 100   asm("pushl %st(2)"); \
 101   asm("pushl %st(3)"); \
 102   asm("pushl %st(4)"); \
 103   asm("pushl %st(5)"); \
 104   asm("pushl %st(6)"); \
 105   asm("pushl %st(7)"); \
 106   asm("pushl %esp"); \
 107   asm("pushl %ebp"); \
 108   asm("pushl %eip"); \
 109   asm("pushl %eflags"); \
 110   asm("pushl %fp1"); \
 111   asm("pushl %fp2"); \
 112   asm("pushl %fp3"); \
 113   asm("pushl %fp4"); \
 114   asm("pushl %fp5"); \
 115   asm("pushl %fp6"); \
 116   asm("pushl %fp7"); \
 117   asm("pushl %fp8"); \
 118   asm("pushl %fp9"); \
 119   asm("pushl %fp10"); \
 120   asm("pushl %fp11"); \
 121   asm("pushl %fp12"); \
 122   asm("pushl %fp13"); \
 123   asm("pushl %fp14"); \
 124   asm("pushl %fp15"); \
 125   asm("pushl %fp16"); \
 126   asm("pushl %fp17"); \
 127   asm("pushl %fp18"); \
 128   asm("pushl %fp19"); \
 129   asm("pushl %fp20"); \
 130   asm("pushl %fp21"); \
 131   asm("pushl %fp22"); \
 132   asm("pushl %fp23"); \
 133   asm("pushl %fp24"); \
 134   asm("pushl %fp25"); \
 135   asm("pushl %fp26"); \
 136   asm("pushl %fp27"); \
 137   asm("pushl %fp28"); \
 138   asm("pushl %fp29"); \
 139   asm("pushl %fp30"); \
 140   asm("pushl %fp31"); \
 141 }
 142 */
 143 /* Assuming the registers (including processor status) have been
 144    pushed on the stack in order of ascending GDB register number,
 145    restore them and return to the address in the saved PC register.  */
 146
 147 #define POP_REGISTERS      \
 148 { asm ("popad"); }