gdb/config/m68k/tm-amix.h

   1 /* Macro definitions for GDB on a Commodore Amiga running SVR4 (amix).
   2    Copyright (C) 1991, Free Software Foundation, Inc.
   3    Written by Fred Fish at Cygnus Support (fnf@cygint)
   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 /* All Amiga's (so far) running UNIX have come standard with the floating
  22    point coprocessor. */
  23
  24 #define HAVE_68881
  25
  26 /* Define BPT_VECTOR if it is different than the default.
  27    This is the vector number used by traps to indicate a breakpoint. */
  28
  29 #define BPT_VECTOR 0x1
  30
  31 /* How much to decrement the PC after a trap.  Depends on kernel. */
  32
  33 #define DECR_PC_AFTER_BREAK 0           /* No decrement required */
  34
  35 /* Address of end of stack space.  Actually one byte past it.
  36    This value is typically very OS dependent.
  37    FIXME:  Check to see if SVR4 offers some machine independent way
  38    of discovering this value and use it if so, and if we need it. */
  39
  40 /* #define STACK_END_ADDR 0xc0800000 */
  41
  42 /* Use the alternate method of determining valid frame chains. */
  43
  44 #define FRAME_CHAIN_VALID_ALTERNATE
  45
  46 #include "tm-sysv4.h"
  47 #include "m68k/tm-68k.h"
  48
  49 /* Offsets (in target ints) into jmp_buf.  Not defined in any system header
  50    file, so we have to step through setjmp/longjmp with a debugger and figure
  51    them out.  As a double check, note that <setjmp> defines _JBLEN as 13,
  52    which matches the number of elements we see saved by setjmp(). */
  53
  54 #define JB_ELEMENT_SIZE sizeof(int)     /* jmp_buf[_JBLEN] is array of ints */
  55
  56 #define JB_D2   0
  57 #define JB_D3   1
  58 #define JB_D4   2
  59 #define JB_D5   3
  60 #define JB_D6   4
  61 #define JB_D7   5
  62 #define JB_A1   6
  63 #define JB_A2   7
  64 #define JB_A3   8
  65 #define JB_A4   9
  66 #define JB_A5   10
  67 #define JB_A6   11
  68 #define JB_A7   12
  69
  70 #define JB_PC   JB_A1   /* Setjmp()'s return PC saved in A1 */
  71
  72 /* Figure out where the longjmp will land.  Slurp the args out of the stack.
  73    We expect the first arg to be a pointer to the jmp_buf structure from which
  74    we extract the pc (JB_PC) that we will land at.  The pc is copied into ADDR.
  75    This routine returns true on success */
  76
  77 #define GET_LONGJMP_TARGET(ADDR) get_longjmp_target(ADDR)