gdb/xm-hp300bsd.h

   1 /* Parameters for hosting on a Hewlett-Packard 9000/300, running bsd.
   2    Copyright 1986, 1987, 1989, 1991, 1992, 1993  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 /*
  21  * Configuration file for HP9000/300 series machine running
  22  * University of Utah's 4.3bsd (or 4.4BSD) port.  This is NOT for HP-UX.
  23  * Problems to hpbsd-bugs@cs.utah.edu
  24  */
  25
  26 #define HOST_BYTE_ORDER BIG_ENDIAN
  27
  28 /* Avoid "INT_MIN redefined" warnings -- by defining it here, exactly
  29    the same as in the system <machine/machtypes.h> file.  */
  30 #undef  INT_MIN
  31 #define INT_MIN         0x80000000
  32
  33 /* Get rid of any system-imposed stack limit if possible.  */
  34
  35 #define SET_STACK_LIMIT_HUGE
  36
  37 /* Get kernel u area address at run-time using BSD style nlist ().  */
  38 #define KERNEL_U_ADDR_BSD
  39
  40 /* Kernel is a bit tenacious about sharing text segments, disallowing bpts.  */
  41 #define ONE_PROCESS_WRITETEXT
  42
  43 /* psignal's definition in 4.4BSD conflicts with the one in defs.h.
  44    But there *is* no psignal definition in 4.3BSD.  So we avoid the defs.h
  45    version here, and supply our own (matching) one.  */
  46 #define PSIGNAL_IN_SIGNAL_H
  47 void    psignal PARAMS ((unsigned int, const char *));
  48
  49 extern char *strdup PARAMS ((const char *));
  50 \f
  51 /* Interface definitions for kernel debugger KDB.  */
  52
  53 /* Map machine fault codes into signal numbers.
  54    First subtract 0, divide by 4, then index in a table.
  55    Faults for which the entry in this table is 0
  56    are not handled by KDB; the program's own trap handler
  57    gets to handle then.  */
  58
  59 #define FAULT_CODE_ORIGIN 0
  60 #define FAULT_CODE_UNITS 4
  61 #define FAULT_TABLE    \
  62 { 0, 0, 0, 0, SIGTRAP, 0, 0, 0, \
  63   0, SIGTRAP, 0, 0, 0, 0, 0, SIGKILL, \
  64   0, 0, 0, 0, 0, 0, 0, 0, \
  65   SIGILL }
  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 ("movel #end, sp");      \
  74   asm ("movel #0,a6"); }
  75
  76 /* Push the frame pointer register on the stack.  */
  77 #define PUSH_FRAME_PTR        \
  78   asm ("movel a6,sp@-");
  79
  80 /* Copy the top-of-stack to the frame pointer register.  */
  81 #define POP_FRAME_PTR  \
  82   asm ("movl sp@,a6");
  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 ("clrw -(sp)");         \
  91   asm ("pea sp@(10)");        \
  92   asm ("movem #0xfffe,sp@-"); }
  93
  94 /* Assuming the registers (including processor status) have been
  95    pushed on the stack in order of ascending GDB register number,
  96    restore them and return to the address in the saved PC register.  */
  97
  98 #define POP_REGISTERS          \
  99 { asm ("subil #8,sp@(28)");     \
 100   asm ("movem sp@,#0xffff"); \
 101   asm ("rte"); }