1 /* Target-dependent code for the Motorola 68000 series.
3 Copyright (C) 1990-2017 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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/>. */
25 /* Register numbers of various important registers. */
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. */
46 /* Number of machine registers. */
47 #define M68K_NUM_REGS (M68K_FPI_REGNUM + 1)
49 /* Size of the largest register. */
50 #define M68K_MAX_REGISTER_SIZE 12
52 /* Convention for returning structures. */
56 pcc_struct_return, /* Return "short" structures in memory. */
57 reg_struct_return /* Return "short" structures in registers. */
60 /* Particular flavour of m68k. */
64 m68k_coldfire_flavour,
68 /* Target-dependent structure in gdbarch. */
72 /* Offset to PC value in the jump buffer. If this is negative,
73 longjmp support will be disabled. */
75 /* The size of each entry in the jump buffer. */
78 /* Register in which the address to store a structure value is
79 passed to a function. */
80 int struct_value_regnum;
82 /* Convention for returning structures. */
83 enum struct_return struct_return;
85 /* Convention for returning floats. zero in int regs, non-zero in float. */
88 /* The particular flavour of m68k. */
89 enum m68k_flavour flavour;
91 /* Flag set if the floating point registers are present, or assumed
95 /* ISA-specific data types. */
96 struct type *m68k_ps_type;
97 struct type *m68881_ext_type;
100 /* Initialize a SVR4 architecture variant. */
101 extern void m68k_svr4_init_abi (struct gdbarch_info, struct gdbarch *);
104 /* Functions exported from m68k-bsd-tdep.c. */
106 extern int m68kbsd_fpreg_offset (struct gdbarch *gdbarch, int regnum);
108 #endif /* m68k-tdep.h */