gdb/m68k-tdep.h

   1 /* Target-dependent code for the Motorola 68000 series.
   2
   3    Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1999, 2000,
   4    2001, 2003, 2004 Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 59 Temple Place - Suite 330,
  21    Boston, MA 02111-1307, USA.  */
  22
  23 #ifndef M68K_TDEP_H
  24 #define M68K_TDEP_H
  25
  26 struct frame_info;
  27
  28 /* Register numbers of various important registers.  */
  29
  30 enum m68k_regnum
  31 {
  32   M68K_D0_REGNUM = 0,
  33   M68K_D1_REGNUM = 1,
  34   M68K_A0_REGNUM = 8,
  35   M68K_A1_REGNUM = 9,
  36   M68K_FP_REGNUM = 14,          /* Address of executing stack frame.  */
  37   M68K_SP_REGNUM = 15,          /* Address of top of stack.  */
  38   M68K_PS_REGNUM = 16,          /* Processor status.  */
  39   M68K_PC_REGNUM = 17,          /* Program counter.  */
  40   M68K_FP0_REGNUM = 18,         /* Floating point register 0.  */
  41   M68K_FPC_REGNUM = 26,         /* 68881 control register.  */
  42   M68K_FPS_REGNUM = 27,         /* 68881 status register.  */
  43   M68K_FPI_REGNUM = 28
  44 };
  45
  46 /* Number of machine registers.  */
  47 #define M68K_NUM_REGS   (M68K_FPI_REGNUM + 1)
  48
  49 /* Size of the largest register.  */
  50 #define M68K_MAX_REGISTER_SIZE  12
  51
  52 /* Convention for returning structures.  */
  53
  54 enum struct_return
  55 {
  56   pcc_struct_return,            /* Return "short" structures in memory.  */
  57   reg_struct_return             /* Return "short" structures in registers.  */
  58 };
  59
  60 /* Target-dependent structure in gdbarch.  */
  61
  62 struct gdbarch_tdep
  63 {
  64   /* Offset to PC value in the jump buffer.  If this is negative,
  65      longjmp support will be disabled.  */
  66   int jb_pc;
  67   /* The size of each entry in the jump buffer.  */
  68   size_t jb_elt_size;
  69
  70   /* Register in which the address to store a structure value is
  71      passed to a function.  */
  72   int struct_value_regnum;
  73
  74   /* Convention for returning structures.  */
  75   enum struct_return struct_return;
  76 };
  77
  78 /* Initialize a SVR4 architecture variant.  */
  79 extern void m68k_svr4_init_abi (struct gdbarch_info, struct gdbarch *);
  80 \f
  81
  82 /* Functions exported from m68kbsd-tdep.c.  */
  83
  84 extern int m68kbsd_fpreg_offset (int regnum);
  85
  86 #endif /* m68k-tdep.h */