summaryrefslogtreecommitdiff
path: root/gcc/config/m68k/m68kelf.h
blob: d3fc41a4e49f185fc795588884b3f838cbd5b4c7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
/* m68kelf support, derived from m68kv4.h */

/* Target definitions for GNU compiler for mc680x0 running System V.4
   Copyright (C) 1991, 1993, 2000, 2002, 2003, 2004, 2007, 2010
   Free Software Foundation, Inc.

   Written by Ron Guilmette (rfg@netcom.com) and Fred Fish (fnf@cygnus.com).

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.

GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */


#ifndef SWBEG_ASM_OP
#define SWBEG_ASM_OP "\t.swbeg\t"
#endif

/* Here are three prefixes that are used by asm_fprintf to
   facilitate customization for alternate assembler syntaxes.
   Machines with no likelihood of an alternate syntax need not
   define these and need not use asm_fprintf.  */

/* The prefix for register names.  Note that REGISTER_NAMES
   is supposed to include this prefix. Also note that this is NOT an
   fprintf format string, it is a literal string */

#undef REGISTER_PREFIX
#define REGISTER_PREFIX "%"

/* The prefix for local (compiler generated) labels.
   These labels will not appear in the symbol table.  */

#undef LOCAL_LABEL_PREFIX
#define LOCAL_LABEL_PREFIX "."

/* The prefix to add to user-visible assembler symbols.  */

#undef USER_LABEL_PREFIX
#define USER_LABEL_PREFIX ""

/* config/m68k.md has an explicit reference to the program counter,
   prefix this by the register prefix.  */

#define ASM_RETURN_CASE_JUMP				\
  do {							\
    if (TARGET_COLDFIRE)				\
      {							\
	if (ADDRESS_REG_P (operands[0]))		\
	  return "jmp %%pc@(2,%0:l)";			\
	else						\
	  return "ext%.l %0\n\tjmp %%pc@(2,%0:l)";	\
      }							\
    else						\
      return "jmp %%pc@(2,%0:w)";			\
  } while (0)

/* This is how to output an assembler line that says to advance the
   location counter to a multiple of 2**LOG bytes.  */

#undef ASM_OUTPUT_ALIGN
#define ASM_OUTPUT_ALIGN(FILE,LOG)				\
do {								\
  if ((LOG) > 0)						\
    fprintf ((FILE), "%s%u\n", ALIGN_ASM_OP, 1 << (LOG));	\
} while (0)

/* Register in which address to store a structure value is passed to a
   function.  The default in m68k.h is a1.  For m68k/SVR4 it is a0.  */

#undef M68K_STRUCT_VALUE_REGNUM
#define M68K_STRUCT_VALUE_REGNUM A0_REG

/* The static chain regnum defaults to a0, but we use that for
   structure return, so have to use a1 for the static chain.  */

#undef STATIC_CHAIN_REGNUM
#define STATIC_CHAIN_REGNUM A1_REG
#undef M68K_STATIC_CHAIN_REG_NAME
#define M68K_STATIC_CHAIN_REG_NAME REGISTER_PREFIX "a1"

#define ASM_COMMENT_START "|"

/* Define how the m68k registers should be numbered for Dwarf output.
   The numbering provided here should be compatible with the native
   SVR4 SDB debugger in the m68k/SVR4 reference port, where d0-d7
   are 0-7, a0-a8 are 8-15, and fp0-fp7 are 16-23.  */

#undef DBX_REGISTER_NUMBER
#define DBX_REGISTER_NUMBER(REGNO) (REGNO)

#if 0
/* SVR4 m68k assembler is bitching on the `comm i,1,1' which askes for 
   1 byte alignment. Don't generate alignment for COMMON seems to be
   safer until we the assembler is fixed.  */
#undef ASM_OUTPUT_ALIGNED_COMMON
/* Same problem with this one.  */
#undef ASM_OUTPUT_ALIGNED_LOCAL
#endif

#undef ASM_OUTPUT_COMMON
#undef ASM_OUTPUT_LOCAL
#define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)  \
( fputs (".comm ", (FILE)),			\
  assemble_name ((FILE), (NAME)),		\
  fprintf ((FILE), ",%u\n", (int)(SIZE)))

#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)  \
( fputs (".lcomm ", (FILE)),			\
  assemble_name ((FILE), (NAME)),		\
  fprintf ((FILE), ",%u\n", (int)(SIZE)))

/* Currently, JUMP_TABLES_IN_TEXT_SECTION must be defined in order to
   keep switch tables in the text section.  */
   
#define JUMP_TABLES_IN_TEXT_SECTION 1

/* In m68k svr4, using swbeg is the standard way to do switch
   table.  */
#undef ASM_OUTPUT_BEFORE_CASE_LABEL
#define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE,PREFIX,NUM,TABLE)		\
  fprintf ((FILE), "%s&%d\n", SWBEG_ASM_OP, XVECLEN (PATTERN (TABLE), 1));
/* end of stuff from m68kv4.h */

#undef ENDFILE_SPEC
#define ENDFILE_SPEC "crtend.o%s"

#undef	STARTFILE_SPEC
#define STARTFILE_SPEC "crtbegin.o%s"

/* If defined, a C expression whose value is a string containing the
   assembler operation to identify the following data as
   uninitialized global data.  If not defined, and neither
   `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
   uninitialized global data will be output in the data section if
   `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
   used.  */
#ifndef BSS_SECTION_ASM_OP
#define BSS_SECTION_ASM_OP	"\t.section\t.bss"
#endif

/* Like `ASM_OUTPUT_BSS' except takes the required alignment as a
   separate, explicit argument.  If you define this macro, it is used
   in place of `ASM_OUTPUT_BSS', and gives you more flexibility in
   handling the required alignment of the variable.  The alignment is
   specified as the number of bits.

   Try to use function `asm_output_aligned_bss' defined in file
   `varasm.c' when defining this macro.  */
#ifndef ASM_OUTPUT_ALIGNED_BSS
#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
  asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
#endif