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1 | /* m68kelf support, derived from m68kv4.h */ |
2 | ||
3 | /* Target definitions for GNU compiler for mc680x0 running System V.4 | |
57809813 | 4 | Copyright (C) 1991, 1993, 2000, 2002, 2003, 2004, 2007, 2010 |
8636be86 | 5 | Free Software Foundation, Inc. |
d1be3be3 JW |
6 | |
7 | Written by Ron Guilmette (rfg@netcom.com) and Fred Fish (fnf@cygnus.com). | |
8 | ||
7ec022b2 | 9 | This file is part of GCC. |
d1be3be3 | 10 | |
7ec022b2 | 11 | GCC is free software; you can redistribute it and/or modify |
d1be3be3 | 12 | it under the terms of the GNU General Public License as published by |
2f83c7d6 | 13 | the Free Software Foundation; either version 3, or (at your option) |
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14 | any later version. |
15 | ||
7ec022b2 | 16 | GCC is distributed in the hope that it will be useful, |
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17 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License | |
2f83c7d6 NC |
22 | along with GCC; see the file COPYING3. If not see |
23 | <http://www.gnu.org/licenses/>. */ | |
d1be3be3 | 24 | |
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25 | |
26 | #ifndef SWBEG_ASM_OP | |
6e7b07a7 | 27 | #define SWBEG_ASM_OP "\t.swbeg\t" |
d1be3be3 JW |
28 | #endif |
29 | ||
ba5f7c88 | 30 | /* Here are three prefixes that are used by asm_fprintf to |
d1be3be3 JW |
31 | facilitate customization for alternate assembler syntaxes. |
32 | Machines with no likelihood of an alternate syntax need not | |
33 | define these and need not use asm_fprintf. */ | |
34 | ||
35 | /* The prefix for register names. Note that REGISTER_NAMES | |
36 | is supposed to include this prefix. Also note that this is NOT an | |
37 | fprintf format string, it is a literal string */ | |
38 | ||
39 | #undef REGISTER_PREFIX | |
40 | #define REGISTER_PREFIX "%" | |
41 | ||
42 | /* The prefix for local (compiler generated) labels. | |
7a1929e1 | 43 | These labels will not appear in the symbol table. */ |
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44 | |
45 | #undef LOCAL_LABEL_PREFIX | |
46 | #define LOCAL_LABEL_PREFIX "." | |
47 | ||
7a1929e1 | 48 | /* The prefix to add to user-visible assembler symbols. */ |
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49 | |
50 | #undef USER_LABEL_PREFIX | |
51 | #define USER_LABEL_PREFIX "" | |
52 | ||
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53 | /* config/m68k.md has an explicit reference to the program counter, |
54 | prefix this by the register prefix. */ | |
55 | ||
c1c1d123 AS |
56 | #define ASM_RETURN_CASE_JUMP \ |
57 | do { \ | |
9425fb04 | 58 | if (TARGET_COLDFIRE) \ |
c1c1d123 AS |
59 | { \ |
60 | if (ADDRESS_REG_P (operands[0])) \ | |
61 | return "jmp %%pc@(2,%0:l)"; \ | |
62 | else \ | |
63 | return "ext%.l %0\n\tjmp %%pc@(2,%0:l)"; \ | |
64 | } \ | |
65 | else \ | |
66 | return "jmp %%pc@(2,%0:w)"; \ | |
2d37187d | 67 | } while (0) |
d1be3be3 | 68 | |
d1be3be3 JW |
69 | /* This is how to output an assembler line that says to advance the |
70 | location counter to a multiple of 2**LOG bytes. */ | |
71 | ||
72 | #undef ASM_OUTPUT_ALIGN | |
73 | #define ASM_OUTPUT_ALIGN(FILE,LOG) \ | |
046b71ed | 74 | do { \ |
d1be3be3 | 75 | if ((LOG) > 0) \ |
016c8440 | 76 | fprintf ((FILE), "%s%u\n", ALIGN_ASM_OP, 1 << (LOG)); \ |
046b71ed | 77 | } while (0) |
d1be3be3 | 78 | |
d1be3be3 | 79 | /* Register in which address to store a structure value is passed to a |
7a1929e1 | 80 | function. The default in m68k.h is a1. For m68k/SVR4 it is a0. */ |
d1be3be3 | 81 | |
8636be86 | 82 | #undef M68K_STRUCT_VALUE_REGNUM |
3bfe36dc | 83 | #define M68K_STRUCT_VALUE_REGNUM A0_REG |
d1be3be3 | 84 | |
835b4008 NS |
85 | /* The static chain regnum defaults to a0, but we use that for |
86 | structure return, so have to use a1 for the static chain. */ | |
87 | ||
88 | #undef STATIC_CHAIN_REGNUM | |
3bfe36dc | 89 | #define STATIC_CHAIN_REGNUM A1_REG |
835b4008 NS |
90 | #undef M68K_STATIC_CHAIN_REG_NAME |
91 | #define M68K_STATIC_CHAIN_REG_NAME REGISTER_PREFIX "a1" | |
92 | ||
d1be3be3 JW |
93 | #define ASM_COMMENT_START "|" |
94 | ||
d1be3be3 JW |
95 | /* Define how the m68k registers should be numbered for Dwarf output. |
96 | The numbering provided here should be compatible with the native | |
97 | SVR4 SDB debugger in the m68k/SVR4 reference port, where d0-d7 | |
7a1929e1 | 98 | are 0-7, a0-a8 are 8-15, and fp0-fp7 are 16-23. */ |
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99 | |
100 | #undef DBX_REGISTER_NUMBER | |
101 | #define DBX_REGISTER_NUMBER(REGNO) (REGNO) | |
102 | ||
d1be3be3 JW |
103 | #if 0 |
104 | /* SVR4 m68k assembler is bitching on the `comm i,1,1' which askes for | |
105 | 1 byte alignment. Don't generate alignment for COMMON seems to be | |
7a1929e1 | 106 | safer until we the assembler is fixed. */ |
d1be3be3 JW |
107 | #undef ASM_OUTPUT_ALIGNED_COMMON |
108 | /* Same problem with this one. */ | |
109 | #undef ASM_OUTPUT_ALIGNED_LOCAL | |
110 | #endif | |
111 | ||
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112 | #undef ASM_OUTPUT_COMMON |
113 | #undef ASM_OUTPUT_LOCAL | |
114 | #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \ | |
115 | ( fputs (".comm ", (FILE)), \ | |
116 | assemble_name ((FILE), (NAME)), \ | |
58e15542 | 117 | fprintf ((FILE), ",%u\n", (int)(SIZE))) |
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118 | |
119 | #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \ | |
120 | ( fputs (".lcomm ", (FILE)), \ | |
121 | assemble_name ((FILE), (NAME)), \ | |
58e15542 | 122 | fprintf ((FILE), ",%u\n", (int)(SIZE))) |
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123 | |
124 | /* Currently, JUMP_TABLES_IN_TEXT_SECTION must be defined in order to | |
7a1929e1 | 125 | keep switch tables in the text section. */ |
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126 | |
127 | #define JUMP_TABLES_IN_TEXT_SECTION 1 | |
128 | ||
57809813 JM |
129 | /* In m68k svr4, using swbeg is the standard way to do switch |
130 | table. */ | |
d1be3be3 JW |
131 | #undef ASM_OUTPUT_BEFORE_CASE_LABEL |
132 | #define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE,PREFIX,NUM,TABLE) \ | |
016c8440 | 133 | fprintf ((FILE), "%s&%d\n", SWBEG_ASM_OP, XVECLEN (PATTERN (TABLE), 1)); |
d1be3be3 JW |
134 | /* end of stuff from m68kv4.h */ |
135 | ||
d1be3be3 JW |
136 | #undef ENDFILE_SPEC |
137 | #define ENDFILE_SPEC "crtend.o%s" | |
138 | ||
139 | #undef STARTFILE_SPEC | |
140 | #define STARTFILE_SPEC "crtbegin.o%s" | |
48b1580e VM |
141 | |
142 | /* If defined, a C expression whose value is a string containing the | |
143 | assembler operation to identify the following data as | |
144 | uninitialized global data. If not defined, and neither | |
145 | `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined, | |
146 | uninitialized global data will be output in the data section if | |
147 | `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be | |
148 | used. */ | |
149 | #ifndef BSS_SECTION_ASM_OP | |
6e7b07a7 | 150 | #define BSS_SECTION_ASM_OP "\t.section\t.bss" |
48b1580e VM |
151 | #endif |
152 | ||
153 | /* Like `ASM_OUTPUT_BSS' except takes the required alignment as a | |
154 | separate, explicit argument. If you define this macro, it is used | |
155 | in place of `ASM_OUTPUT_BSS', and gives you more flexibility in | |
156 | handling the required alignment of the variable. The alignment is | |
157 | specified as the number of bits. | |
158 | ||
159 | Try to use function `asm_output_aligned_bss' defined in file | |
7a1929e1 | 160 | `varasm.c' when defining this macro. */ |
48b1580e VM |
161 | #ifndef ASM_OUTPUT_ALIGNED_BSS |
162 | #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ | |
163 | asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN) | |
164 | #endif |