| 1 | /* |
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| 2 | * Copyright (c) 1996-2007 MIPS Technologies, Inc. |
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| 3 | * Copyright (C) 2009 CodeSourcery, LLC. |
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| 4 | * |
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| 5 | * All rights reserved. |
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| 6 | * |
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| 7 | * Redistribution and use in source and binary forms, with or without |
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| 8 | * modification, are permitted provided that the following conditions |
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| 9 | * are met: |
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| 10 | * |
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| 11 | * * Redistributions of source code must retain the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer. |
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| 13 | * * Redistributions in binary form must reproduce the above |
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| 14 | * copyright |
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| 15 | * notice, this list of conditions and the following disclaimer |
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| 16 | * in the documentation and/or other materials provided with |
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| 17 | * the distribution. |
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| 18 | * * Neither the name of MIPS Technologies Inc. nor the names of its |
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| 19 | * contributors may be used to endorse or promote products derived |
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| 20 | * from this software without specific prior written permission. |
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| 21 | * |
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| 22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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| 23 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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| 24 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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| 25 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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| 26 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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| 27 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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| 28 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 29 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 30 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 31 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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| 32 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 33 | */ |
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| 34 | |
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| 35 | /* |
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| 36 | * asm.h: various macros to help assembly language writers |
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| 37 | */ |
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| 38 | |
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| 39 | #ifndef _MIPS_ASM_H_ |
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| 40 | #define _MIPS_ASM_H_ |
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| 41 | |
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| 42 | /* ABI specific stack frame layout and manipulation. */ |
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| 43 | #if _MIPS_SIM==_ABIO32 && ! __mips64 |
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| 44 | /* Standard O32 */ |
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| 45 | #define SZREG 4 /* saved register size */ |
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| 46 | #define REG_S sw /* store saved register */ |
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| 47 | #define REG_L lw /* load saved register */ |
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| 48 | #define SZARG 4 /* argument register size */ |
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| 49 | #define NARGSAVE 4 /* arg register space on caller stack */ |
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| 50 | #define ALSZ 7 /* stack alignment - 1 */ |
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| 51 | #define ALMASK (~7) /* stack alignment mask */ |
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| 52 | #define LOG2_STACK_ALGN 3 /* log2(8) */ |
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| 53 | #define SZPTR 4 /* pointer size */ |
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| 54 | #define LOG2_SZPTR 2 /* log2(4) */ |
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| 55 | #define PTR_S sw /* store pointer */ |
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| 56 | #define PTR_L lw /* load pointer */ |
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| 57 | #define PTR_SUBU subu /* decrement pointer */ |
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| 58 | #define PTR_ADDU addu /* increment pointer */ |
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| 59 | #define PTR .word /* pointer type pseudo */ |
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| 60 | #elif _MIPS_SIM==_ABIO32 && __mips64 |
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| 61 | /* Algorithmics O32+64-bit */ |
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| 62 | #define SZREG 8 /* saved register size */ |
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| 63 | #define REG_S sd /* store saved register */ |
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| 64 | #define REG_L ld /* load saved register */ |
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| 65 | #define SZARG 4 /* argument register size */ |
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| 66 | #define NARGSAVE 4 /* arg register space on caller stack */ |
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| 67 | #define ALSZ 7 /* stack alignment - 1 */ |
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| 68 | #define ALMASK (~7) /* stack alignment mask */ |
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| 69 | #define LOG2_STACK_ALGN 3 /* log2(8) */ |
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| 70 | #define SZPTR 4 /* pointer size */ |
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| 71 | #define LOG2_SZPTR 2 /* log2(4) */ |
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| 72 | #define PTR_S sw /* store pointer */ |
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| 73 | #define PTR_L lw /* load pointer */ |
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| 74 | #define PTR_SUBU subu /* decrement pointer */ |
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| 75 | #define PTR_ADDU addu /* increment pointer */ |
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| 76 | #define PTR .word /* pointer type pseudo */ |
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| 77 | #elif _MIPS_SIM==_ABIO64 |
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| 78 | /* Cygnus O64 */ |
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| 79 | #define SZREG 8 /* saved register size */ |
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| 80 | #define REG_S sd /* store saved register */ |
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| 81 | #define REG_L ld /* load saved register */ |
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| 82 | #define SZARG 8 /* argument register size */ |
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| 83 | #define NARGSAVE 4 /* arg register space on caller stack */ |
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| 84 | #define ALSZ 7 /* stack alignment - 1 */ |
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| 85 | #define ALMASK (~7) /* stack alignment mask */ |
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| 86 | #define LOG2_STACK_ALGN 3 /* log2(8) */ |
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| 87 | #define SZPTR 4 /* pointer size */ |
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| 88 | #define LOG2_SZPTR 2 /* log2(4) */ |
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| 89 | #define PTR_S sw /* store pointer */ |
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| 90 | #define PTR_L lw /* load pointer */ |
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| 91 | #define PTR_SUBU subu /* decrement pointer */ |
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| 92 | #define PTR_ADDU addu /* increment pointer */ |
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| 93 | #define PTR .word /* pointer type pseudo */ |
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| 94 | #elif _MIPS_SIM==_ABIN32 |
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| 95 | /* Standard N32 */ |
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| 96 | #define SZREG 8 /* saved register size */ |
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| 97 | #define REG_S sd /* store saved register */ |
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| 98 | #define REG_L ld /* load saved register */ |
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| 99 | #define SZARG 8 /* argument register size */ |
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| 100 | #define NARGSAVE 0 /* arg register space on caller stack */ |
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| 101 | #define ALSZ 15 /* stack alignment - 1 */ |
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| 102 | #define ALMASK (~15) /* stack alignment mask */ |
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| 103 | #define LOG2_STACK_ALGN 4 /* log2(16) */ |
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| 104 | #define SZPTR 4 /* pointer size */ |
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| 105 | #define LOG2_SZPTR 2 /* log2(4) */ |
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| 106 | #define PTR_S sw /* store pointer */ |
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| 107 | #define PTR_L lw /* load pointer */ |
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| 108 | #define PTR_SUBU subu /* decrement pointer (SGI uses sub) */ |
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| 109 | #define PTR_ADDU addu /* increment pointer (SGI uses add) */ |
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| 110 | #define PTR .word /* pointer type pseudo */ |
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| 111 | #elif _MIPS_SIM==_ABI64 |
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| 112 | /* Standard N64 */ |
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| 113 | #define SZREG 8 /* saved register size */ |
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| 114 | #define REG_S sd /* store saved register */ |
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| 115 | #define REG_L ld /* load saved register */ |
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| 116 | #define SZARG 8 /* argument register size */ |
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| 117 | #define NARGSAVE 0 /* arg register space on caller stack */ |
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| 118 | #define ALSZ 15 /* stack alignment - 1 */ |
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| 119 | #define ALMASK (~15) /* stack alignment mask */ |
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| 120 | #define LOG2_STACK_ALGN 4 /* log2(16) */ |
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| 121 | #define SZPTR 8 /* pointer size */ |
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| 122 | #define LOG2_SZPTR 3 /* log2(8) */ |
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| 123 | #define PTR_S sd /* store pointer */ |
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| 124 | #define PTR_L ld /* load pointer */ |
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| 125 | #define PTR_SUBU dsubu /* decrement pointer */ |
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| 126 | #define PTR_ADDU daddu /* increment pointer */ |
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| 127 | #define PTR .dword /* pointer type pseudo */ |
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| 128 | #else |
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| 129 | #error Unknown ABI |
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| 130 | #endif |
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| 131 | |
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| 132 | /* Concatenate two names. */ |
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| 133 | #ifdef __STDC__ |
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| 134 | # define _ASMCONCAT(A, B) A ## B |
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| 135 | #else |
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| 136 | # define _ASMCONCAT(A, B) A/**/B |
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| 137 | #endif |
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| 138 | |
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| 139 | /* Name of reset code section. */ |
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| 140 | #ifndef _RESET_SECTION |
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| 141 | # define _RESET_SECTION .section .reset, "ax", @progbits |
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| 142 | #endif |
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| 143 | |
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| 144 | #ifndef _RESET_SECTION_NAMED |
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| 145 | /* No function section support for now, since binutils fails to cope with |
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| 146 | external branches. */ |
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| 147 | # define _RESET_SECTION_NAMED(name) .pushsection .reset, "ax", @progbits |
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| 148 | #endif |
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| 149 | |
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| 150 | /* Name of boot code section. */ |
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| 151 | #ifndef _BOOT_SECTION |
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| 152 | # define _BOOT_SECTION .section .boot, "ax", @progbits |
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| 153 | #endif |
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| 154 | |
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| 155 | #ifndef _BOOT_SECTION_NAMED |
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| 156 | /* No function section support for now, since binutils fails to cope with |
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| 157 | external branches. */ |
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| 158 | # define _BOOT_SECTION_NAMED(name) .pushsection .boot, "ax", @progbits |
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| 159 | #endif |
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| 160 | |
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| 161 | /* Name of standard code section. */ |
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| 162 | #ifndef _NORMAL_SECTION_UNNAMED |
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| 163 | # define _NORMAL_SECTION_UNNAMED .section .text, "ax", @progbits |
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| 164 | #endif |
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| 165 | |
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| 166 | #ifndef _NORMAL_SECTION_NAMED |
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| 167 | # ifdef _FUNCTION_SECTIONS_ |
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| 168 | # define _NORMAL_SECTION_NAMED(name) .pushsection .text ##.name, "ax", @progbits |
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| 169 | # else |
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| 170 | # define _NORMAL_SECTION_NAMED(name) .pushsection .text, "ax", @progbits |
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| 171 | # endif |
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| 172 | #endif |
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| 173 | |
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| 174 | /* Default code section. */ |
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| 175 | #ifndef _TEXT_SECTION_NAMED |
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| 176 | # if defined(_RESETCODE) |
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| 177 | # define _TEXT_SECTION_NAMED _RESET_SECTION_NAMED |
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| 178 | # elif defined(_BOOTCODE) |
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| 179 | # define _TEXT_SECTION_NAMED _BOOT_SECTION_NAMED |
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| 180 | # else |
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| 181 | # define _TEXT_SECTION_NAMED _NORMAL_SECTION_NAMED |
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| 182 | # endif |
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| 183 | #endif |
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| 184 | |
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| 185 | #ifndef _TEXT_SECTION |
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| 186 | # if defined(_RESETCODE) |
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| 187 | # define _TEXT_SECTION _RESET_SECTION |
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| 188 | # elif defined(_BOOTCODE) |
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| 189 | # define _TEXT_SECTION _BOOT_SECTION |
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| 190 | # else |
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| 191 | # define _TEXT_SECTION _NORMAL_SECTION_UNNAMED |
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| 192 | # endif |
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| 193 | _TEXT_SECTION |
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| 194 | #endif |
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| 195 | |
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| 196 | /* |
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| 197 | * Leaf functions declarations. |
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| 198 | */ |
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| 199 | |
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| 200 | /* Global leaf function. */ |
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| 201 | #define LEAF(name) \ |
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| 202 | _TEXT_SECTION_NAMED(name); \ |
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| 203 | .globl name; \ |
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| 204 | .balign 4; \ |
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| 205 | .ent name; \ |
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| 206 | name: |
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| 207 | |
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| 208 | /* Static/Local leaf function. */ |
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| 209 | #define SLEAF(name) \ |
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| 210 | _TEXT_SECTION_NAMED(name); \ |
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| 211 | .balign 4; \ |
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| 212 | .ent name; \ |
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| 213 | name: |
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| 214 | |
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| 215 | /* Weak leaf function. */ |
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| 216 | #define WLEAF(name) \ |
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| 217 | _TEXT_SECTION_NAMED(name); \ |
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| 218 | .weakext name; \ |
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| 219 | .balign 4; \ |
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| 220 | .ent name; \ |
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| 221 | name: |
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| 222 | |
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| 223 | /* Weak alias leaf function. */ |
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| 224 | #define ALEAF(name,alias) \ |
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| 225 | _TEXT_SECTION_NAMED(name); \ |
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| 226 | .weakext alias,name; \ |
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| 227 | .balign 4; \ |
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| 228 | .ent name; \ |
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| 229 | name: |
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| 230 | |
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| 231 | /* |
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| 232 | * Alternative function entrypoints. |
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| 233 | */ |
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| 234 | |
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| 235 | /* Global alternative entrypoint. */ |
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| 236 | #define AENT(name) \ |
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| 237 | .globl name; \ |
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| 238 | .balign 4; \ |
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| 239 | .aent name; \ |
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| 240 | name: |
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| 241 | #define XLEAF(name) AENT(name) |
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| 242 | |
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| 243 | /* Local/static alternative entrypoint. */ |
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| 244 | #define SAENT(name) \ |
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| 245 | .balign 4; \ |
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| 246 | .aent name; \ |
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| 247 | name: |
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| 248 | #define SXLEAF(name) SAENT(name) |
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| 249 | |
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| 250 | |
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| 251 | /* |
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| 252 | * Leaf functions declarations. |
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| 253 | */ |
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| 254 | |
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| 255 | /* Global nested function. */ |
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| 256 | #define NESTED(name, framesz, rareg) \ |
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| 257 | _TEXT_SECTION_NAMED(name); \ |
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| 258 | .globl name; \ |
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| 259 | .balign 4; \ |
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| 260 | .ent name; \ |
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| 261 | .frame sp, framesz, rareg; \ |
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| 262 | name: |
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| 263 | |
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| 264 | /* Static/Local nested function. */ |
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| 265 | #define SNESTED(name, framesz, rareg) \ |
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| 266 | _TEXT_SECTION_NAMED(name); \ |
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| 267 | .balign 4; \ |
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| 268 | .ent name; \ |
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| 269 | .frame sp, framesz, rareg; \ |
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| 270 | name: |
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| 271 | |
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| 272 | /* Weak nested function. */ |
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| 273 | #define WNESTED(name, framesz, rareg) \ |
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| 274 | _TEXT_SECTION_NAMED(name); \ |
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| 275 | .weakext name; \ |
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| 276 | .balign 4; \ |
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| 277 | .ent name; \ |
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| 278 | .frame sp, framesz, rareg; \ |
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| 279 | name: |
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| 280 | |
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| 281 | /* Weak alias nested function. */ |
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| 282 | #define ANESTED(name, alias, framesz, rareg) \ |
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| 283 | _TEXT_SECTION_NAMED(name); \ |
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| 284 | .weakext alias, name; \ |
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| 285 | .balign 4; \ |
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| 286 | .ent name; \ |
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| 287 | .frame sp, framesz, rareg; \ |
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| 288 | name: |
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| 289 | |
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| 290 | /* |
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| 291 | * Function termination |
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| 292 | */ |
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| 293 | #define END(name) \ |
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| 294 | .size name,.-name; \ |
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| 295 | .end name; \ |
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| 296 | .popsection |
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| 297 | |
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| 298 | #define SEND(name) END(name) |
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| 299 | #define WEND(name) END(name) |
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| 300 | #define AEND(name,alias) END(name) |
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| 301 | |
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| 302 | /* |
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| 303 | * Global data declaration. |
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| 304 | */ |
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| 305 | #define EXPORT(name) \ |
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| 306 | .globl name; \ |
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| 307 | .type name,@object; \ |
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| 308 | name: |
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| 309 | |
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| 310 | /* |
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| 311 | * Global data declaration with size. |
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| 312 | */ |
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| 313 | #define EXPORTS(name,sz) \ |
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| 314 | .globl name; \ |
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| 315 | .type name,@object; \ |
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| 316 | .size name,sz; \ |
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| 317 | name: |
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| 318 | |
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| 319 | /* |
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| 320 | * Weak data declaration with size. |
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| 321 | */ |
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| 322 | #define WEXPORT(name,sz) \ |
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| 323 | .weakext name; \ |
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| 324 | .type name,@object; \ |
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| 325 | .size name,sz; \ |
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| 326 | name: |
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| 327 | |
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| 328 | /* |
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| 329 | * Global data reference with size. |
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| 330 | */ |
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| 331 | #define IMPORT(name, size) \ |
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| 332 | .extern name,size |
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| 333 | |
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| 334 | /* |
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| 335 | * Global zeroed data. |
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| 336 | */ |
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| 337 | #define BSS(name,size) \ |
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| 338 | .type name,@object; \ |
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| 339 | .comm name,size |
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| 340 | |
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| 341 | /* |
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| 342 | * Local zeroed data. |
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| 343 | */ |
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| 344 | #define LBSS(name,size) \ |
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| 345 | .lcomm name,size |
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| 346 | |
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| 347 | /* |
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| 348 | * Insert call to _mcount if profiling. |
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| 349 | */ |
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| 350 | #ifdef __PROFILING__ |
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| 351 | #define _MCOUNT \ |
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| 352 | .set push; \ |
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| 353 | .set noat; \ |
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| 354 | move $1,$31; \ |
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| 355 | jal _mcount; \ |
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| 356 | .set pop |
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| 357 | #else |
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| 358 | #define _MCOUNT |
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| 359 | #endif |
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| 360 | |
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| 361 | #endif |
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