| 1 | /* Target-dependent code for the Motorola 68000 series. |
| 2 | |
| 3 | Copyright (C) 1990-2015 Free Software Foundation, Inc. |
| 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 3 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, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #ifndef M68K_TDEP_H |
| 21 | #define M68K_TDEP_H |
| 22 | |
| 23 | struct frame_info; |
| 24 | |
| 25 | /* Register numbers of various important registers. */ |
| 26 | |
| 27 | enum m68k_regnum |
| 28 | { |
| 29 | M68K_D0_REGNUM = 0, |
| 30 | M68K_D1_REGNUM = 1, |
| 31 | M68K_D2_REGNUM = 2, |
| 32 | M68K_D7_REGNUM = 7, |
| 33 | M68K_A0_REGNUM = 8, |
| 34 | M68K_A1_REGNUM = 9, |
| 35 | M68K_A2_REGNUM = 10, |
| 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 | /* Particular flavour of m68k. */ |
| 61 | enum m68k_flavour |
| 62 | { |
| 63 | m68k_no_flavour, |
| 64 | m68k_coldfire_flavour, |
| 65 | m68k_fido_flavour |
| 66 | }; |
| 67 | |
| 68 | /* Target-dependent structure in gdbarch. */ |
| 69 | |
| 70 | struct gdbarch_tdep |
| 71 | { |
| 72 | /* Offset to PC value in the jump buffer. If this is negative, |
| 73 | longjmp support will be disabled. */ |
| 74 | int jb_pc; |
| 75 | /* The size of each entry in the jump buffer. */ |
| 76 | size_t jb_elt_size; |
| 77 | |
| 78 | /* Register in which the address to store a structure value is |
| 79 | passed to a function. */ |
| 80 | int struct_value_regnum; |
| 81 | |
| 82 | /* Convention for returning structures. */ |
| 83 | enum struct_return struct_return; |
| 84 | |
| 85 | /* Convention for returning floats. zero in int regs, non-zero in float. */ |
| 86 | int float_return; |
| 87 | |
| 88 | /* The particular flavour of m68k. */ |
| 89 | enum m68k_flavour flavour; |
| 90 | |
| 91 | /* Flag set if the floating point registers are present, or assumed |
| 92 | to be present. */ |
| 93 | int fpregs_present; |
| 94 | |
| 95 | /* ISA-specific data types. */ |
| 96 | struct type *m68k_ps_type; |
| 97 | struct type *m68881_ext_type; |
| 98 | }; |
| 99 | |
| 100 | /* Initialize a SVR4 architecture variant. */ |
| 101 | extern void m68k_svr4_init_abi (struct gdbarch_info, struct gdbarch *); |
| 102 | \f |
| 103 | |
| 104 | /* Functions exported from m68kbsd-tdep.c. */ |
| 105 | |
| 106 | extern int m68kbsd_fpreg_offset (struct gdbarch *gdbarch, int regnum); |
| 107 | |
| 108 | #endif /* m68k-tdep.h */ |