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2927db06 | 1 | /* m68kelf support, derived from m68kv4.h */ |
2 | ||
3 | /* Target definitions for GNU compiler for mc680x0 running System V.4 | |
f1717362 | 4 | Copyright (C) 1991-2016 Free Software Foundation, Inc. |
2927db06 | 5 | |
6 | Written by Ron Guilmette (rfg@netcom.com) and Fred Fish (fnf@cygnus.com). | |
7 | ||
187b36cf | 8 | This file is part of GCC. |
2927db06 | 9 | |
187b36cf | 10 | GCC is free software; you can redistribute it and/or modify |
2927db06 | 11 | it under the terms of the GNU General Public License as published by |
038d1e19 | 12 | the Free Software Foundation; either version 3, or (at your option) |
2927db06 | 13 | any later version. |
14 | ||
187b36cf | 15 | GCC is distributed in the hope that it will be useful, |
2927db06 | 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
038d1e19 | 21 | along with GCC; see the file COPYING3. If not see |
22 | <http://www.gnu.org/licenses/>. */ | |
2927db06 | 23 | |
2927db06 | 24 | |
25 | #ifndef SWBEG_ASM_OP | |
abfc0262 | 26 | #define SWBEG_ASM_OP "\t.swbeg\t" |
2927db06 | 27 | #endif |
28 | ||
bfcb79ea | 29 | /* Here are three prefixes that are used by asm_fprintf to |
2927db06 | 30 | facilitate customization for alternate assembler syntaxes. |
31 | Machines with no likelihood of an alternate syntax need not | |
32 | define these and need not use asm_fprintf. */ | |
33 | ||
34 | /* The prefix for register names. Note that REGISTER_NAMES | |
35 | is supposed to include this prefix. Also note that this is NOT an | |
36 | fprintf format string, it is a literal string */ | |
37 | ||
38 | #undef REGISTER_PREFIX | |
39 | #define REGISTER_PREFIX "%" | |
40 | ||
41 | /* The prefix for local (compiler generated) labels. | |
0c0492c9 | 42 | These labels will not appear in the symbol table. */ |
2927db06 | 43 | |
44 | #undef LOCAL_LABEL_PREFIX | |
45 | #define LOCAL_LABEL_PREFIX "." | |
46 | ||
0c0492c9 | 47 | /* The prefix to add to user-visible assembler symbols. */ |
2927db06 | 48 | |
49 | #undef USER_LABEL_PREFIX | |
50 | #define USER_LABEL_PREFIX "" | |
51 | ||
2927db06 | 52 | /* config/m68k.md has an explicit reference to the program counter, |
53 | prefix this by the register prefix. */ | |
54 | ||
251538ce | 55 | #define ASM_RETURN_CASE_JUMP \ |
56 | do { \ | |
960e6739 | 57 | if (TARGET_COLDFIRE) \ |
251538ce | 58 | { \ |
59 | if (ADDRESS_REG_P (operands[0])) \ | |
60 | return "jmp %%pc@(2,%0:l)"; \ | |
61 | else \ | |
62 | return "ext%.l %0\n\tjmp %%pc@(2,%0:l)"; \ | |
63 | } \ | |
64 | else \ | |
65 | return "jmp %%pc@(2,%0:w)"; \ | |
3c4608dc | 66 | } while (0) |
2927db06 | 67 | |
2927db06 | 68 | /* This is how to output an assembler line that says to advance the |
69 | location counter to a multiple of 2**LOG bytes. */ | |
70 | ||
71 | #undef ASM_OUTPUT_ALIGN | |
72 | #define ASM_OUTPUT_ALIGN(FILE,LOG) \ | |
04194a66 | 73 | do { \ |
2927db06 | 74 | if ((LOG) > 0) \ |
ff60eaf8 | 75 | fprintf ((FILE), "%s%u\n", ALIGN_ASM_OP, 1 << (LOG)); \ |
04194a66 | 76 | } while (0) |
2927db06 | 77 | |
2927db06 | 78 | /* Register in which address to store a structure value is passed to a |
0c0492c9 | 79 | function. The default in m68k.h is a1. For m68k/SVR4 it is a0. */ |
2927db06 | 80 | |
c8c47ddf | 81 | #undef M68K_STRUCT_VALUE_REGNUM |
9d463c3d | 82 | #define M68K_STRUCT_VALUE_REGNUM A0_REG |
2927db06 | 83 | |
f6aeaff7 | 84 | /* The static chain regnum defaults to a0, but we use that for |
85 | structure return, so have to use a1 for the static chain. */ | |
86 | ||
87 | #undef STATIC_CHAIN_REGNUM | |
9d463c3d | 88 | #define STATIC_CHAIN_REGNUM A1_REG |
f6aeaff7 | 89 | #undef M68K_STATIC_CHAIN_REG_NAME |
90 | #define M68K_STATIC_CHAIN_REG_NAME REGISTER_PREFIX "a1" | |
91 | ||
2927db06 | 92 | #define ASM_COMMENT_START "|" |
93 | ||
2927db06 | 94 | /* Define how the m68k registers should be numbered for Dwarf output. |
95 | The numbering provided here should be compatible with the native | |
96 | SVR4 SDB debugger in the m68k/SVR4 reference port, where d0-d7 | |
0c0492c9 | 97 | are 0-7, a0-a8 are 8-15, and fp0-fp7 are 16-23. */ |
2927db06 | 98 | |
99 | #undef DBX_REGISTER_NUMBER | |
100 | #define DBX_REGISTER_NUMBER(REGNO) (REGNO) | |
101 | ||
2927db06 | 102 | #if 0 |
103 | /* SVR4 m68k assembler is bitching on the `comm i,1,1' which askes for | |
104 | 1 byte alignment. Don't generate alignment for COMMON seems to be | |
0c0492c9 | 105 | safer until we the assembler is fixed. */ |
2927db06 | 106 | #undef ASM_OUTPUT_ALIGNED_COMMON |
107 | /* Same problem with this one. */ | |
108 | #undef ASM_OUTPUT_ALIGNED_LOCAL | |
109 | #endif | |
110 | ||
2927db06 | 111 | #undef ASM_OUTPUT_COMMON |
112 | #undef ASM_OUTPUT_LOCAL | |
113 | #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \ | |
114 | ( fputs (".comm ", (FILE)), \ | |
115 | assemble_name ((FILE), (NAME)), \ | |
d716c068 | 116 | fprintf ((FILE), ",%u\n", (int)(SIZE))) |
2927db06 | 117 | |
118 | #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \ | |
119 | ( fputs (".lcomm ", (FILE)), \ | |
120 | assemble_name ((FILE), (NAME)), \ | |
d716c068 | 121 | fprintf ((FILE), ",%u\n", (int)(SIZE))) |
2927db06 | 122 | |
123 | /* Currently, JUMP_TABLES_IN_TEXT_SECTION must be defined in order to | |
0c0492c9 | 124 | keep switch tables in the text section. */ |
2927db06 | 125 | |
126 | #define JUMP_TABLES_IN_TEXT_SECTION 1 | |
127 | ||
91276c47 | 128 | /* In m68k svr4, using swbeg is the standard way to do switch |
129 | table. */ | |
2927db06 | 130 | #undef ASM_OUTPUT_BEFORE_CASE_LABEL |
131 | #define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE,PREFIX,NUM,TABLE) \ | |
ff60eaf8 | 132 | fprintf ((FILE), "%s&%d\n", SWBEG_ASM_OP, XVECLEN (PATTERN (TABLE), 1)); |
2927db06 | 133 | /* end of stuff from m68kv4.h */ |
134 | ||
2927db06 | 135 | #undef ENDFILE_SPEC |
136 | #define ENDFILE_SPEC "crtend.o%s" | |
137 | ||
138 | #undef STARTFILE_SPEC | |
139 | #define STARTFILE_SPEC "crtbegin.o%s" | |
ea50d488 | 140 | |
ea50d488 | 141 | #ifndef BSS_SECTION_ASM_OP |
abfc0262 | 142 | #define BSS_SECTION_ASM_OP "\t.section\t.bss" |
ea50d488 | 143 | #endif |
144 | ||
ea50d488 | 145 | #ifndef ASM_OUTPUT_ALIGNED_BSS |
146 | #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ | |
147 | asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN) | |
148 | #endif |