2005-04-28 Andrew Cagney <cagney@gnu.org>
[deliverable/binutils-gdb.git] / gdb / m68k-tdep.h
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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.
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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
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26struct frame_info;
27
748894bf 28/* Register numbers of various important registers. */
32eeb91a 29
748894bf 30enum m68k_regnum
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31{
32 M68K_D0_REGNUM = 0,
8de307e0 33 M68K_D1_REGNUM = 1,
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34 M68K_D2_REGNUM = 2,
35 M68K_D7_REGNUM = 7,
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36 M68K_A0_REGNUM = 8,
37 M68K_A1_REGNUM = 9,
c0c2b0db 38 M68K_A2_REGNUM = 10,
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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. */
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46 M68K_FPI_REGNUM = 28
47};
48
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49/* Number of machine registers. */
50#define M68K_NUM_REGS (M68K_FPI_REGNUM + 1)
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51
52/* Size of the largest register. */
53#define M68K_MAX_REGISTER_SIZE 12
54
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55/* Convention for returning structures. */
56
57enum struct_return
58{
59 pcc_struct_return, /* Return "short" structures in memory. */
60 reg_struct_return /* Return "short" structures in registers. */
61};
62
eb2e12d7 63/* Target-dependent structure in gdbarch. */
748894bf 64
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65struct 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;
8de307e0 72
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73 /* Register in which the address to store a structure value is
74 passed to a function. */
75 int struct_value_regnum;
76
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77 /* Convention for returning structures. */
78 enum struct_return struct_return;
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79};
80
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81/* Initialize a SVR4 architecture variant. */
82extern void m68k_svr4_init_abi (struct gdbarch_info, struct gdbarch *);
83\f
84
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85/* Functions exported from m68kbsd-tdep.c. */
86
87extern int m68kbsd_fpreg_offset (int regnum);
88
748894bf 89#endif /* m68k-tdep.h */
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