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import gdb-1999-07-07 post reformat
[thirdparty/binutils-gdb.git] / gdb / config / m68k / tm-delta68.h
1 /* Target definitions for delta68.
2 Copyright 1993, 1994, 1998 Free Software Foundation, Inc.
3
4 This file is part of GDB.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
20
21 /* Define BPT_VECTOR if it is different than the default.
22 This is the vector number used by traps to indicate a breakpoint. */
23
24 #define BPT_VECTOR 0x1
25
26 #define GCC_COMPILED_FLAG_SYMBOL "gcc_compiled%"
27 #define GCC2_COMPILED_FLAG_SYMBOL "gcc2_compiled%"
28
29 /* Amount PC must be decremented by after a breakpoint.
30 On the Delta, the kernel decrements it for us. */
31
32 #define DECR_PC_AFTER_BREAK 0
33
34 /* Not sure what happens if we try to store this register, but
35 phdm@info.ucl.ac.be says we need this define. */
36
37 #define CANNOT_STORE_REGISTER(regno) (regno == FPI_REGNUM)
38
39 /* Extract from an array REGBUF containing the (raw) register state
40 a function return value of type TYPE, and copy that, in virtual format,
41 into VALBUF. */
42
43 /* When it returns a float/double value, use fp0 in sysV68. */
44 /* When it returns a pointer value, use a0 in sysV68. */
45
46 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
47 if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
48 REGISTER_CONVERT_TO_VIRTUAL (FP0_REGNUM, TYPE, \
49 &REGBUF[REGISTER_BYTE (FP0_REGNUM)], \
50 VALBUF); \
51 else \
52 memcpy ((VALBUF), \
53 (char *) ((REGBUF) + \
54 (TYPE_CODE(TYPE) == TYPE_CODE_PTR ? 8 * 4 : \
55 (TYPE_LENGTH(TYPE) >= 4 ? 0 : 4 - TYPE_LENGTH(TYPE)))), \
56 TYPE_LENGTH(TYPE))
57
58 /* Write into appropriate registers a function return value
59 of type TYPE, given in virtual format. */
60
61 /* When it returns a float/double value, use fp0 in sysV68. */
62 /* When it returns a pointer value, use a0 in sysV68. */
63
64 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
65 if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
66 { \
67 char raw_buf[REGISTER_RAW_SIZE (FP0_REGNUM)]; \
68 REGISTER_CONVERT_TO_RAW (TYPE, FP0_REGNUM, VALBUF, raw_buf); \
69 write_register_bytes (REGISTER_BYTE (FP0_REGNUM), \
70 raw_buf, REGISTER_RAW_SIZE (FP0_REGNUM)); \
71 } \
72 else \
73 write_register_bytes ((TYPE_CODE(TYPE) == TYPE_CODE_PTR ? 8 * 4 : 0), \
74 VALBUF, TYPE_LENGTH (TYPE))
75
76 /* Return number of args passed to a frame.
77 Can return -1, meaning no way to tell. */
78
79 extern int delta68_frame_num_args PARAMS ((struct frame_info * fi));
80 #define FRAME_NUM_ARGS(fi) (delta68_frame_num_args ((fi)))
81
82 /* On M68040 versions of sysV68 R3V7.1, ptrace(PT_WRITE_I) does not clear
83 the processor's instruction cache as it should. */
84 #define CLEAR_INSN_CACHE() clear_insn_cache()
85
86 #include "m68k/tm-m68k.h"
87
88 /* Extract from an array REGBUF containing the (raw) register state
89 the address in which a function should return its structure value,
90 as a CORE_ADDR (or an expression that can be used as one). */
91
92 #undef EXTRACT_STRUCT_VALUE_ADDRESS
93 #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF)\
94 (*(CORE_ADDR *)((char*)(REGBUF) + 8 * 4))