1 /* Target-dependent code for the Motorola 68000 series. 2 3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1999, 2000, 2001, 4 2003, 2004, 2007, 2008, 2009, 2010, 2011 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 3 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, see <http://www.gnu.org/licenses/>. */ 20 21 #ifndef M68K_TDEP_H 22 #define M68K_TDEP_H 23 24 struct frame_info; 25 26 /* Register numbers of various important registers. */ 27 28 enum m68k_regnum 29 { 30 M68K_D0_REGNUM = 0, 31 M68K_D1_REGNUM = 1, 32 M68K_D2_REGNUM = 2, 33 M68K_D7_REGNUM = 7, 34 M68K_A0_REGNUM = 8, 35 M68K_A1_REGNUM = 9, 36 M68K_A2_REGNUM = 10, 37 M68K_FP_REGNUM = 14, /* Address of executing stack frame. */ 38 M68K_SP_REGNUM = 15, /* Address of top of stack. */ 39 M68K_PS_REGNUM = 16, /* Processor status. */ 40 M68K_PC_REGNUM = 17, /* Program counter. */ 41 M68K_FP0_REGNUM = 18, /* Floating point register 0. */ 42 M68K_FPC_REGNUM = 26, /* 68881 control register. */ 43 M68K_FPS_REGNUM = 27, /* 68881 status register. */ 44 M68K_FPI_REGNUM = 28 45 }; 46 47 /* Number of machine registers. */ 48 #define M68K_NUM_REGS (M68K_FPI_REGNUM + 1) 49 50 /* Size of the largest register. */ 51 #define M68K_MAX_REGISTER_SIZE 12 52 53 /* Convention for returning structures. */ 54 55 enum struct_return 56 { 57 pcc_struct_return, /* Return "short" structures in memory. */ 58 reg_struct_return /* Return "short" structures in registers. */ 59 }; 60 61 /* Particular flavour of m68k. */ 62 enum m68k_flavour 63 { 64 m68k_no_flavour, 65 m68k_coldfire_flavour, 66 m68k_fido_flavour 67 }; 68 69 /* Target-dependent structure in gdbarch. */ 70 71 struct gdbarch_tdep 72 { 73 /* Offset to PC value in the jump buffer. If this is negative, 74 longjmp support will be disabled. */ 75 int jb_pc; 76 /* The size of each entry in the jump buffer. */ 77 size_t jb_elt_size; 78 79 /* Register in which the address to store a structure value is 80 passed to a function. */ 81 int struct_value_regnum; 82 83 /* Convention for returning structures. */ 84 enum struct_return struct_return; 85 86 /* Convention for returning floats. zero in int regs, non-zero in float. */ 87 int float_return; 88 89 /* The particular flavour of m68k. */ 90 enum m68k_flavour flavour; 91 92 /* Flag set if the floating point registers are present, or assumed 93 to be present. */ 94 int fpregs_present; 95 96 /* ISA-specific data types. */ 97 struct type *m68k_ps_type; 98 struct type *m68881_ext_type; 99 }; 100 101 /* Initialize a SVR4 architecture variant. */ 102 extern void m68k_svr4_init_abi (struct gdbarch_info, struct gdbarch *); 103 104 105 /* Functions exported from m68kbsd-tdep.c. */ 106 107 extern int m68kbsd_fpreg_offset (struct gdbarch *gdbarch, int regnum); 108 109 #endif /* m68k-tdep.h */ 110