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_D2_REGNUM = 2, 35 M68K_D7_REGNUM = 7, 36 M68K_A0_REGNUM = 8, 37 M68K_A1_REGNUM = 9, 38 M68K_A2_REGNUM = 10, 39 M68K_FP_REGNUM = 14, /* Address of executing stack frame. */ 40 M68K_SP_REGNUM = 15, /* Address of top of stack. */ 41 M68K_PS_REGNUM = 16, /* Processor status. */ 42 M68K_PC_REGNUM = 17, /* Program counter. */ 43 M68K_FP0_REGNUM = 18, /* Floating point register 0. */ 44 M68K_FPC_REGNUM = 26, /* 68881 control register. */ 45 M68K_FPS_REGNUM = 27, /* 68881 status register. */ 46 M68K_FPI_REGNUM = 28 47 }; 48 49 /* Number of machine registers. */ 50 #define M68K_NUM_REGS (M68K_FPI_REGNUM + 1) 51 52 /* Size of the largest register. */ 53 #define M68K_MAX_REGISTER_SIZE 12 54 55 /* Convention for returning structures. */ 56 57 enum struct_return 58 { 59 pcc_struct_return, /* Return "short" structures in memory. */ 60 reg_struct_return /* Return "short" structures in registers. */ 61 }; 62 63 /* Target-dependent structure in gdbarch. */ 64 65 struct gdbarch_tdep 66 { 67 /* Offset to PC value in the jump buffer. If this is negative, 68 longjmp support will be disabled. */ 69 int jb_pc; 70 /* The size of each entry in the jump buffer. */ 71 size_t jb_elt_size; 72 73 /* Register in which the address to store a structure value is 74 passed to a function. */ 75 int struct_value_regnum; 76 77 /* Convention for returning structures. */ 78 enum struct_return struct_return; 79 }; 80 81 /* Initialize a SVR4 architecture variant. */ 82 extern void m68k_svr4_init_abi (struct gdbarch_info, struct gdbarch *); 83 84 85 /* Functions exported from m68kbsd-tdep.c. */ 86 87 extern int m68kbsd_fpreg_offset (int regnum); 88 89 #endif /* m68k-tdep.h */ 90