gdb/xm-hp300bsd.h

   1 /* Parameters for hosting on a Hewlett-Packard 9000/300, running bsd.
   2    Copyright (C) 1986, 1987, 1989, 1991 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 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 /* This is a piece of magic that is given a register number REGNO
  41    and as BLOCKEND the address in the system of the end of the user structure
  42    and stores in ADDR the address in the kernel or core dump
  43    of that register.  */
  44
  45 #define REGISTER_U_ADDR(addr, blockend, regno)                          \
  46 {                                                                       \
  47   if (regno < PS_REGNUM)                                                \
  48     addr = (int) &((struct frame *)(blockend))->f_regs[regno];          \
  49   else if (regno == PS_REGNUM)                                          \
  50     addr = (int) &((struct frame *)(blockend))->f_stackadj;             \
  51   else if (regno == PC_REGNUM)                                          \
  52     addr = (int) &((struct frame *)(blockend))->f_pc;                   \
  53   else if (regno < FPC_REGNUM)                                          \
  54     addr = (int)                                                        \
  55       &((struct user *)0)->u_pcb.pcb_fpregs.fpf_regs[((regno)-FP0_REGNUM)*3];\
  56   else if (regno == FPC_REGNUM)                                         \
  57     addr = (int) &((struct user *)0)->u_pcb.pcb_fpregs.fpf_fpcr;        \
  58   else if (regno == FPS_REGNUM)                                         \
  59     addr = (int) &((struct user *)0)->u_pcb.pcb_fpregs.fpf_fpsr;        \
  60   else                                                                  \
  61     addr = (int) &((struct user *)0)->u_pcb.pcb_fpregs.fpf_fpiar;       \
  62 }
  63
  64 /* Compensate for lack of `vprintf' function.  */
  65 #define MISSING_VPRINTF
  66
  67 /* Kernel is a bit tenacious about sharing text segments, disallowing bpts.  */
  68 #define ONE_PROCESS_WRITETEXT
  69 \f
  70 /* Interface definitions for kernel debugger KDB.  */
  71
  72 /* Map machine fault codes into signal numbers.
  73    First subtract 0, divide by 4, then index in a table.
  74    Faults for which the entry in this table is 0
  75    are not handled by KDB; the program's own trap handler
  76    gets to handle then.  */
  77
  78 #define FAULT_CODE_ORIGIN 0
  79 #define FAULT_CODE_UNITS 4
  80 #define FAULT_TABLE    \
  81 { 0, 0, 0, 0, SIGTRAP, 0, 0, 0, \
  82   0, SIGTRAP, 0, 0, 0, 0, 0, SIGKILL, \
  83   0, 0, 0, 0, 0, 0, 0, 0, \
  84   SIGILL }
  85
  86 /* Start running with a stack stretching from BEG to END.
  87    BEG and END should be symbols meaningful to the assembler.
  88    This is used only for kdb.  */
  89
  90 #define INIT_STACK(beg, end)  \
  91 { asm (".globl end");         \
  92   asm ("movel #end, sp");      \
  93   asm ("movel #0,a6"); }
  94
  95 /* Push the frame pointer register on the stack.  */
  96 #define PUSH_FRAME_PTR        \
  97   asm ("movel a6,sp@-");
  98
  99 /* Copy the top-of-stack to the frame pointer register.  */
 100 #define POP_FRAME_PTR  \
 101   asm ("movl sp@,a6");
 102
 103 /* After KDB is entered by a fault, push all registers
 104    that GDB thinks about (all NUM_REGS of them),
 105    so that they appear in order of ascending GDB register number.
 106    The fault code will be on the stack beyond the last register.  */
 107
 108 #define PUSH_REGISTERS        \
 109 { asm ("clrw -(sp)");         \
 110   asm ("pea sp@(10)");        \
 111   asm ("movem #0xfffe,sp@-"); }
 112
 113 /* Assuming the registers (including processor status) have been
 114    pushed on the stack in order of ascending GDB register number,
 115    restore them and return to the address in the saved PC register.  */
 116
 117 #define POP_REGISTERS          \
 118 { asm ("subil #8,sp@(28)");     \
 119   asm ("movem sp@,#0xffff"); \
 120   asm ("rte"); }