| 1 | /* ----------------------------------------------------------------------- |
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| 2 | * |
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| 3 | * Copyright 2008-2009 H. Peter Anvin - All Rights Reserved |
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| 4 | * Copyright 2009 Intel Corporation; author: H. Peter Anvin |
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| 5 | * |
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| 6 | * This program is free software; you can redistribute it and/or modify |
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| 7 | * it under the terms of the GNU General Public License as published by |
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| 8 | * the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, |
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| 9 | * Boston MA 02110-1301, USA; either version 2 of the License, or |
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| 10 | * (at your option) any later version; incorporated herein by reference. |
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| 11 | * |
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| 12 | * ----------------------------------------------------------------------- */ |
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| 13 | |
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| 14 | /* |
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| 15 | * Linker script for the SYSLINUX core |
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| 16 | */ |
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| 17 | |
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| 18 | OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386") |
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| 19 | OUTPUT_ARCH(i386) |
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| 20 | EXTERN(_start) |
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| 21 | ENTRY(_start) |
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| 22 | |
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| 23 | STACK32_LEN = 65536; |
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| 24 | |
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| 25 | SECTIONS |
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| 26 | { |
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| 27 | /* Prefix structure for the compression program */ |
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| 28 | . = 0; |
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| 29 | __module_start = .; |
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| 30 | .prefix : { |
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| 31 | *(.prefix) |
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| 32 | } |
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| 33 | |
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| 34 | /* "Early" sections (before the load) */ |
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| 35 | . = 0x1000; |
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| 36 | |
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| 37 | .earlybss (NOLOAD) : { |
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| 38 | __earlybss_start = .; |
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| 39 | *(.earlybss) |
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| 40 | __earlybss_end = .; |
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| 41 | } |
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| 42 | __earlybss_len = ABSOLUTE(__earlybss_end) - ABSOLUTE(__earlybss_start); |
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| 43 | __earlybss_dwords = (__earlybss_len + 3) >> 2; |
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| 44 | |
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| 45 | . = ALIGN(4); |
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| 46 | .bss16 (NOLOAD) : { |
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| 47 | __bss16_start = .; |
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| 48 | *(.bss16) |
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| 49 | __bss16_end = .; |
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| 50 | } |
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| 51 | __bss16_len = ABSOLUTE(__bss16_end) - ABSOLUTE(__bss16_start); |
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| 52 | __bss16_dwords = (__bss16_len + 3) >> 2; |
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| 53 | |
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| 54 | . = ALIGN(4); |
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| 55 | .config : AT (__config_lma) { |
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| 56 | __config_start = .; |
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| 57 | *(.config) |
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| 58 | __config_end = .; |
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| 59 | } |
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| 60 | __config_len = ABSOLUTE(__config_end) - ABSOLUTE(__config_start); |
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| 61 | __config_dwords = (__config_len + 3) >> 2; |
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| 62 | |
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| 63 | /* Generated and/or copied code */ |
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| 64 | |
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| 65 | . = ALIGN(128); /* Minimum separation from mutable data */ |
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| 66 | .replacestub : AT (__replacestub_lma) { |
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| 67 | __replacestub_start = .; |
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| 68 | *(.replacestub) |
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| 69 | __replacestub_end = .; |
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| 70 | } |
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| 71 | __replacestub_len = ABSOLUTE(__replacestub_end) - ABSOLUTE(__replacestub_start); |
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| 72 | __replacestub_dwords = (__replacestub_len + 3) >> 2; |
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| 73 | |
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| 74 | . = ALIGN(16); |
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| 75 | __gentextnr_lma = .; |
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| 76 | .gentextnr : AT(__gentextnr_lma) { |
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| 77 | __gentextnr_start = .; |
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| 78 | *(.gentextnr) |
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| 79 | __gentextnr_end = .; |
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| 80 | } |
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| 81 | __gentextnr_len = ABSOLUTE(__gentextnr_end) - ABSOLUTE(__gentextnr_start); |
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| 82 | __gentextnr_dwords = (__gentextnr_len + 3) >> 2; |
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| 83 | |
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| 84 | . = STACK_BASE; |
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| 85 | .stack16 : AT(STACK_BASE) { |
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| 86 | __stack16_start = .; |
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| 87 | . += STACK_LEN; |
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| 88 | __stack16_end = .; |
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| 89 | } |
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| 90 | __stack16_len = ABSOLUTE(__stack16_end) - ABSOLUTE(__stack16_start); |
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| 91 | __stack16_dwords = (__stack16_len + 3) >> 2; |
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| 92 | |
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| 93 | /* Initialized sections */ |
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| 94 | |
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| 95 | . = 0x7c00; |
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| 96 | .init : { |
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| 97 | FILL(0x90909090) |
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| 98 | __init_start = .; |
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| 99 | *(.init) |
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| 100 | __init_end = .; |
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| 101 | } |
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| 102 | __init_len = ABSOLUTE(__init_end) - ABSOLUTE(__init_start); |
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| 103 | __init_dwords = (__init_len + 3) >> 2; |
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| 104 | |
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| 105 | .text16 : { |
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| 106 | FILL(0x90909090) |
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| 107 | __text16_start = .; |
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| 108 | *(.text16) |
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| 109 | __text16_end = .; |
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| 110 | } |
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| 111 | __text16_len = ABSOLUTE(__text16_end) - ABSOLUTE(__text16_start); |
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| 112 | __text16_dwords = (__text16_len + 3) >> 2; |
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| 113 | |
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| 114 | /* |
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| 115 | * .textnr is used for 32-bit code that is used on the code |
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| 116 | * path to initialize the .text segment |
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| 117 | */ |
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| 118 | . = ALIGN(16); |
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| 119 | .textnr : { |
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| 120 | FILL(0x90909090) |
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| 121 | __textnr_start = .; |
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| 122 | *(.textnr) |
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| 123 | __textnr_end = .; |
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| 124 | } |
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| 125 | __textnr_len = ABSOLUTE(__textnr_end) - ABSOLUTE(__textnr_start); |
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| 126 | __textnr_dwords = (__textnr_len + 3) >> 2; |
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| 127 | |
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| 128 | . = ALIGN(16); |
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| 129 | __bcopyxx_start = .; |
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| 130 | |
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| 131 | .bcopyxx.text : { |
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| 132 | FILL(0x90909090) |
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| 133 | __bcopyxx_text_start = .; |
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| 134 | *(.bcopyxx.text) |
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| 135 | __bcopyxx_text_end = .; |
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| 136 | } |
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| 137 | __bcopyxx_text_len = ABSOLUTE(__bcopyxx_text_end) - ABSOLUTE(__bcopyxx_text_start); |
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| 138 | __bcopyxx_text_dwords = (__bcopyxx_text_len + 3) >> 2; |
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| 139 | |
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| 140 | .bcopyxx.data : { |
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| 141 | __bcopyxx_data_start = .; |
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| 142 | *(.bcopyxx.text) |
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| 143 | __bcopyxx_data_end = .; |
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| 144 | } |
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| 145 | __bcopyxx_data_len = ABSOLUTE(__bcopyxx_data_end) - ABSOLUTE(__bcopyxx_data_start); |
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| 146 | __bcopyxx_data_dwords = (__bcopyxx_data_len + 3) >> 2; |
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| 147 | |
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| 148 | __bcopyxx_end = .; |
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| 149 | __bcopyxx_len = ABSOLUTE(__bcopyxx_end) - ABSOLUTE(__bcopyxx_start); |
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| 150 | __bcopyxx_dwords = (__bcopyxx_len + 3) >> 2; |
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| 151 | |
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| 152 | . = ALIGN(4); |
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| 153 | .data16 : { |
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| 154 | __data16_start = .; |
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| 155 | *(.data16) |
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| 156 | __data16_end = .; |
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| 157 | } |
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| 158 | __data16_len = ABSOLUTE(__data16_end) - ABSOLUTE(__data16_start); |
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| 159 | __data16_dwords = (__data16_len + 3) >> 2; |
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| 160 | |
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| 161 | . = ALIGN(4); |
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| 162 | __config_lma = .; |
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| 163 | . += SIZEOF(.config); |
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| 164 | |
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| 165 | . = ALIGN(4); |
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| 166 | __replacestub_lma = .; |
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| 167 | . += SIZEOF(.replacestub); |
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| 168 | |
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| 169 | /* The 32-bit code loads above the non-progbits sections */ |
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| 170 | |
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| 171 | . = ALIGN(16); |
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| 172 | __pm_code_lma = .; |
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| 173 | |
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| 174 | __high_clear_start = .; |
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| 175 | |
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| 176 | . = ALIGN(512); |
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| 177 | .adv (NOLOAD) : { |
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| 178 | __adv_start = .; |
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| 179 | *(.adv) |
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| 180 | __adv_end = .; |
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| 181 | } |
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| 182 | __adv_len = ABSOLUTE(__adv_end) - ABSOLUTE(__adv_start); |
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| 183 | __adv_dwords = (__adv_len + 3) >> 2; |
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| 184 | |
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| 185 | /* Late uninitialized sections */ |
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| 186 | |
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| 187 | . = ALIGN(4); |
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| 188 | .uibss (NOLOAD) : { |
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| 189 | __uibss_start = .; |
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| 190 | *(.uibss) |
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| 191 | __uibss_end = .; |
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| 192 | } |
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| 193 | __uibss_len = ABSOLUTE(__uibss_end) - ABSOLUTE(__uibss_start); |
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| 194 | __uibss_dwords = (__uibss_len + 3) >> 2; |
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| 195 | |
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| 196 | _end16 = .; |
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| 197 | __assert_end16 = ASSERT(_end16 <= 0x10000, "64K overflow"); |
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| 198 | |
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| 199 | /* |
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| 200 | * Special 16-bit segments |
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| 201 | */ |
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| 202 | |
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| 203 | . = ALIGN(65536); |
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| 204 | .real_mode (NOLOAD) : { |
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| 205 | *(.real_mode) |
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| 206 | } |
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| 207 | real_mode_seg = core_real_mode >> 4; |
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| 208 | |
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| 209 | . = ALIGN(65536); |
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| 210 | .xfer_buf (NOLOAD) : { |
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| 211 | *(.xfer_buf) |
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| 212 | } |
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| 213 | xfer_buf_seg = core_xfer_buf >> 4; |
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| 214 | |
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| 215 | /* |
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| 216 | * The auxilliary data segment is used by the 16-bit code |
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| 217 | * for items that don't need to live in the bottom 64K. |
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| 218 | */ |
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| 219 | |
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| 220 | . = ALIGN(16); |
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| 221 | .auxseg (NOLOAD) : { |
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| 222 | __auxseg_start = .; |
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| 223 | *(.auxseg) |
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| 224 | __auxseg_end = .; |
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| 225 | } |
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| 226 | __auxseg_len = ABSOLUTE(__auxseg_end) - ABSOLUTE(__auxseg_start); |
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| 227 | __auxseg_dwords = (__auxseg_len + 3) >> 2; |
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| 228 | aux_seg = __auxseg_start >> 4; |
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| 229 | |
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| 230 | /* |
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| 231 | * Used to allocate lowmem buffers from 32-bit code |
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| 232 | */ |
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| 233 | .lowmem (NOLOAD) : { |
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| 234 | __lowmem_start = .; |
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| 235 | *(.lowmem) |
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| 236 | __lowmem_end = .; |
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| 237 | } |
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| 238 | __lowmem_len = ABSOLUTE(__lowmem_end) - ABSOLUTE(__lowmem_start); |
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| 239 | __lowmem_dwords = (__lowmem_len + 3) >> 2; |
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| 240 | |
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| 241 | __high_clear_end = .; |
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| 242 | |
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| 243 | __high_clear_len = ABSOLUTE(__high_clear_end) - ABSOLUTE(__high_clear_start); |
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| 244 | __high_clear_dwords = (__high_clear_len + 3) >> 2; |
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| 245 | |
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| 246 | /* Start of the lowmem heap */ |
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| 247 | . = ALIGN(16); |
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| 248 | __lowmem_heap = .; |
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| 249 | |
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| 250 | /* |
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| 251 | * 32-bit code. This is a hack for the moment due to the |
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| 252 | * real-mode segments also allocated. |
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| 253 | */ |
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| 254 | |
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| 255 | . = 0x100000; |
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| 256 | |
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| 257 | __pm_code_start = .; |
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| 258 | |
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| 259 | __text_vma = .; |
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| 260 | __text_lma = __pm_code_lma; |
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| 261 | .text : AT(__text_lma) { |
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| 262 | FILL(0x90909090) |
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| 263 | __text_start = .; |
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| 264 | *(.text) |
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| 265 | *(.text.*) |
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| 266 | __text_end = .; |
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| 267 | } |
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| 268 | |
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| 269 | . = ALIGN(16); |
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| 270 | |
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| 271 | __rodata_vma = .; |
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| 272 | __rodata_lma = __rodata_vma + __text_lma - __text_vma; |
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| 273 | .rodata : AT(__rodata_lma) { |
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| 274 | __rodata_start = .; |
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| 275 | *(.rodata) |
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| 276 | *(.rodata.*) |
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| 277 | __rodata_end = .; |
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| 278 | } |
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| 279 | |
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| 280 | . = ALIGN(4); |
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| 281 | |
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| 282 | __ctors_vma = .; |
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| 283 | __ctors_lma = __ctors_vma + __text_lma - __text_vma; |
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| 284 | .ctors : AT(__ctors_lma) { |
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| 285 | __ctors_start = .; |
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| 286 | KEEP (*(SORT(.ctors.*))) |
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| 287 | KEEP (*(.ctors)) |
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| 288 | __ctors_end = .; |
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| 289 | } |
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| 290 | |
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| 291 | __dtors_vma = .; |
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| 292 | __dtors_lma = __dtors_vma + __text_lma - __text_vma; |
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| 293 | .dtors : AT(__dtors_lma) { |
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| 294 | __dtors_start = .; |
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| 295 | KEEP (*(SORT(.dtors.*))) |
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| 296 | KEEP (*(.dtors)) |
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| 297 | __dtors_end = .; |
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| 298 | } |
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| 299 | |
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| 300 | . = ALIGN(4); |
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| 301 | |
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| 302 | __dynsym_vma = .; |
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| 303 | __dynsym_lma = __dynsym_vma + __text_lma - __text_vma; |
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| 304 | .dynsym : AT(__dynsym_lma) { |
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| 305 | __dynsym_start = .; |
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| 306 | *(.dynsym) |
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| 307 | __dynsym_end = .; |
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| 308 | } |
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| 309 | __dynsym_len = __dynsym_end - __dynsym_start; |
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| 310 | |
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| 311 | . = ALIGN(4); |
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| 312 | |
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| 313 | __dynstr_vma = .; |
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| 314 | __dynstr_lma = __dynstr_vma + __text_lma - __text_vma; |
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| 315 | .dynstr : AT(__dynstr_lma) { |
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| 316 | __dynstr_start = .; |
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| 317 | *(.dynstr) |
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| 318 | __dynstr_end = .; |
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| 319 | } |
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| 320 | __dynstr_len = __dynstr_end - __dynstr_start; |
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| 321 | |
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| 322 | . = ALIGN(4); |
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| 323 | |
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| 324 | __gnu_hash_vma = .; |
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| 325 | __gnu_hash_lma = __gnu_hash_vma + __text_lma - __text_vma; |
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| 326 | .gnu.hash : AT(__gnu_hash_lma) { |
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| 327 | __gnu_hash_start = .; |
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| 328 | *(.gnu.hash) |
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| 329 | __gnu_hash_end = .; |
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| 330 | } |
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| 331 | |
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| 332 | |
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| 333 | . = ALIGN(4); |
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| 334 | |
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| 335 | __dynlink_vma = .; |
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| 336 | __dynlink_lma = __dynlink_vma + __text_lma - __text_vma; |
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| 337 | .dynlink : AT(__dynlink_lma) { |
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| 338 | __dynlink_start = .; |
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| 339 | *(.dynlink) |
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| 340 | __dynlink_end = .; |
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| 341 | } |
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| 342 | |
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| 343 | . = ALIGN(4); |
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| 344 | |
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| 345 | __got_vma = .; |
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| 346 | __got_lma = __got_vma + __text_lma - __text_vma; |
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| 347 | .got : AT(__got_lma) { |
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| 348 | __got_start = .; |
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| 349 | KEEP (*(.got.plt)) |
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| 350 | KEEP (*(.got)) |
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| 351 | __got_end = .; |
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| 352 | } |
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| 353 | |
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| 354 | . = ALIGN(4); |
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| 355 | |
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| 356 | __dynamic_vma = .; |
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| 357 | __dynamic_lma = __dynamic_vma + __text_lma - __text_vma; |
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| 358 | .dynamic : AT(__dynamic_lma) { |
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| 359 | __dynamic_start = .; |
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| 360 | *(.dynamic) |
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| 361 | __dynamic_end = .; |
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| 362 | } |
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| 363 | |
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| 364 | . = ALIGN(16); |
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| 365 | |
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| 366 | __data_vma = .; |
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| 367 | __data_lma = __data_vma + __text_lma - __text_vma; |
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| 368 | .data : AT(__data_lma) { |
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| 369 | __data_start = .; |
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| 370 | *(.data) |
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| 371 | *(.data.*) |
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| 372 | __data_end = .; |
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| 373 | } |
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| 374 | |
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| 375 | __pm_code_end = .; |
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| 376 | __pm_code_len = ABSOLUTE(__pm_code_end) - ABSOLUTE(__pm_code_start); |
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| 377 | __pm_code_dwords = (__pm_code_len + 3) >> 2; |
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| 378 | |
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| 379 | . = ALIGN(128); |
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| 380 | |
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| 381 | __bss_vma = .; |
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| 382 | __bss_lma = .; /* Dummy */ |
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| 383 | .bss (NOLOAD) : AT (__bss_lma) { |
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| 384 | __bss_start = .; |
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| 385 | *(.bss) |
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| 386 | *(.bss.*) |
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| 387 | *(COMMON) |
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| 388 | __bss_end = .; |
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| 389 | } |
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| 390 | __bss_len = ABSOLUTE(__bss_end) - ABSOLUTE(__bss_start); |
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| 391 | __bss_dwords = (__bss_len + 3) >> 2; |
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| 392 | |
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| 393 | /* Very large objects which don't need to be zeroed */ |
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| 394 | |
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| 395 | __hugebss_vma = .; |
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| 396 | __hugebss_lma = .; /* Dummy */ |
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| 397 | .hugebss (NOLOAD) : AT (__hugebss_lma) { |
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| 398 | __hugebss_start = .; |
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| 399 | *(.hugebss) |
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| 400 | *(.hugebss.*) |
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| 401 | __hugebss_end = .; |
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| 402 | } |
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| 403 | __hugebss_len = ABSOLUTE(__hugebss_end) - ABSOLUTE(__hugebss_start); |
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| 404 | __hugebss_dwords = (__hugebss_len + 3) >> 2; |
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| 405 | |
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| 406 | |
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| 407 | /* XXX: This stack should be unified with the COM32 stack */ |
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| 408 | __stack_vma = .; |
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| 409 | __stack_lma = .; /* Dummy */ |
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| 410 | .stack (NOLOAD) : AT(__stack_lma) { |
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| 411 | __stack_start = .; |
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| 412 | *(.stack) |
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| 413 | __stack_end = .; |
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| 414 | } |
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| 415 | __stack_len = ABSOLUTE(__stack_end) - ABSOLUTE(__stack_start); |
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| 416 | __stack_dwords = (__stack_len + 3) >> 2; |
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| 417 | |
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| 418 | _end = .; |
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| 419 | |
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| 420 | /* COM32R and kernels are loaded after our own PM code */ |
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| 421 | . = ALIGN(65536); |
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| 422 | free_high_memory = .; |
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| 423 | |
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| 424 | /* Stuff we don't need... */ |
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| 425 | /DISCARD/ : { |
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| 426 | *(.eh_frame) |
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| 427 | } |
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| 428 | } |
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