[e16e8f2] | 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 | HIDDEN(__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 | HIDDEN(__earlybss_start = .); |
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| 39 | *(.earlybss) |
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| 40 | HIDDEN(__earlybss_end = .); |
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| 41 | } |
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| 42 | HIDDEN(__earlybss_len = ABSOLUTE(__earlybss_end) - ABSOLUTE(__earlybss_start)); |
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| 43 | HIDDEN(__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 | HIDDEN(__bss16_start = .); |
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| 48 | *(.bss16) |
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| 49 | HIDDEN(__bss16_end = .); |
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| 50 | } |
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| 51 | HIDDEN(__bss16_len = ABSOLUTE(__bss16_end) - ABSOLUTE(__bss16_start)); |
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| 52 | HIDDEN(__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 | HIDDEN(__config_start = .); |
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| 57 | *(.config) |
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| 58 | HIDDEN(__config_end = .); |
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| 59 | } |
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| 60 | HIDDEN(__config_len = ABSOLUTE(__config_end) - ABSOLUTE(__config_start)); |
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| 61 | HIDDEN(__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 | HIDDEN(__replacestub_start = .); |
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| 68 | *(.replacestub) |
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| 69 | HIDDEN(__replacestub_end = .); |
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| 70 | } |
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| 71 | HIDDEN(__replacestub_len = ABSOLUTE(__replacestub_end) - ABSOLUTE(__replacestub_start)); |
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| 72 | HIDDEN(__replacestub_dwords = (__replacestub_len + 3) >> 2); |
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| 73 | |
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| 74 | . = ALIGN(16); |
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| 75 | HIDDEN(__gentextnr_lma = .); |
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| 76 | .gentextnr : AT(__gentextnr_lma) { |
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| 77 | HIDDEN(__gentextnr_start = .); |
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| 78 | *(.gentextnr) |
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| 79 | HIDDEN(__gentextnr_end = .); |
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| 80 | } |
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| 81 | HIDDEN(__gentextnr_len = ABSOLUTE(__gentextnr_end) - ABSOLUTE(__gentextnr_start)); |
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| 82 | HIDDEN(__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 | HIDDEN(__stack16_start = .); |
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| 87 | . += STACK_LEN; |
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| 88 | HIDDEN(__stack16_end = .); |
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| 89 | } |
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| 90 | HIDDEN(__stack16_len = ABSOLUTE(__stack16_end) - ABSOLUTE(__stack16_start)); |
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| 91 | HIDDEN(__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 | HIDDEN(__init_start = .); |
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| 99 | *(.init) |
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| 100 | HIDDEN(__init_end = .); |
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| 101 | } |
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| 102 | HIDDEN(__init_len = ABSOLUTE(__init_end) - ABSOLUTE(__init_start)); |
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| 103 | HIDDEN(__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 | HIDDEN(__text16_start = .); |
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| 108 | *(.text16) |
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| 109 | HIDDEN(__text16_end = .); |
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| 110 | } |
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| 111 | HIDDEN(__text16_len = ABSOLUTE(__text16_end) - ABSOLUTE(__text16_start)); |
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| 112 | HIDDEN(__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 | HIDDEN(__textnr_start = .); |
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| 122 | *(.textnr) |
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| 123 | HIDDEN(__textnr_end = .); |
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| 124 | } |
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| 125 | HIDDEN(__textnr_len = ABSOLUTE(__textnr_end) - ABSOLUTE(__textnr_start)); |
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| 126 | HIDDEN(__textnr_dwords = (__textnr_len + 3) >> 2); |
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| 127 | |
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| 128 | . = ALIGN(16); |
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| 129 | HIDDEN(__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 | HIDDEN(__bcopyxx_text_start = .); |
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| 134 | *(.bcopyxx.text) |
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| 135 | HIDDEN(__bcopyxx_text_end = .); |
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| 136 | } |
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| 137 | HIDDEN(__bcopyxx_text_len = ABSOLUTE(__bcopyxx_text_end) - ABSOLUTE(__bcopyxx_text_start)); |
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| 138 | HIDDEN(__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 | HIDDEN(__bcopyxx_data_start = .); |
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| 142 | *(.bcopyxx.text) |
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| 143 | HIDDEN(__bcopyxx_data_end = .); |
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| 144 | } |
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| 145 | HIDDEN(__bcopyxx_data_len = ABSOLUTE(__bcopyxx_data_end) - ABSOLUTE(__bcopyxx_data_start)); |
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| 146 | HIDDEN(__bcopyxx_data_dwords = (__bcopyxx_data_len + 3) >> 2); |
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| 147 | |
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| 148 | HIDDEN(__bcopyxx_end = .); |
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| 149 | HIDDEN(__bcopyxx_len = ABSOLUTE(__bcopyxx_end) - ABSOLUTE(__bcopyxx_start)); |
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| 150 | HIDDEN(__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 | HIDDEN(__data16_start = .); |
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| 155 | *(.data16) |
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| 156 | HIDDEN(__data16_end = .); |
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| 157 | } |
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| 158 | HIDDEN(__data16_len = ABSOLUTE(__data16_end) - ABSOLUTE(__data16_start)); |
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| 159 | HIDDEN(__data16_dwords = (__data16_len + 3) >> 2); |
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| 160 | |
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| 161 | . = ALIGN(4); |
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| 162 | HIDDEN(__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 | HIDDEN(__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 | HIDDEN(__pm_code_lma = .); |
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| 173 | |
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| 174 | HIDDEN(__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 | HIDDEN(__adv_start = .); |
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| 179 | *(.adv) |
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| 180 | HIDDEN(__adv_end = .); |
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| 181 | } |
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| 182 | HIDDEN(__adv_len = ABSOLUTE(__adv_end) - ABSOLUTE(__adv_start)); |
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| 183 | HIDDEN(__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 | HIDDEN(__uibss_start = .); |
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| 190 | *(.uibss) |
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| 191 | HIDDEN(__uibss_end = .); |
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| 192 | } |
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| 193 | HIDDEN(__uibss_len = ABSOLUTE(__uibss_end) - ABSOLUTE(__uibss_start)); |
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| 194 | HIDDEN(__uibss_dwords = (__uibss_len + 3) >> 2); |
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| 195 | |
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| 196 | HIDDEN(_end16 = .); |
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| 197 | HIDDEN(__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 | HIDDEN(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 | HIDDEN(xfer_buf_seg = core_xfer_buf >> 4); |
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| 214 | |
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| 215 | /* |
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| 216 | * Used to allocate lowmem buffers from 32-bit code |
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| 217 | */ |
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| 218 | .lowmem (NOLOAD) : { |
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| 219 | HIDDEN(__lowmem_start = .); |
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| 220 | *(.lowmem) |
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| 221 | HIDDEN(__lowmem_end = .); |
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| 222 | } |
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| 223 | HIDDEN(__lowmem_len = ABSOLUTE(__lowmem_end) - ABSOLUTE(__lowmem_start)); |
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| 224 | HIDDEN(__lowmem_dwords = (__lowmem_len + 3) >> 2); |
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| 225 | |
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| 226 | HIDDEN(__high_clear_end = .); |
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| 227 | |
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| 228 | HIDDEN(__high_clear_len = ABSOLUTE(__high_clear_end) - ABSOLUTE(__high_clear_start)); |
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| 229 | HIDDEN(__high_clear_dwords = (__high_clear_len + 3) >> 2); |
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| 230 | |
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| 231 | /* Start of the lowmem heap */ |
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| 232 | . = ALIGN(16); |
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| 233 | HIDDEN(__lowmem_heap = .); |
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| 234 | |
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| 235 | /* |
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| 236 | * 32-bit code. This is a hack for the moment due to the |
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| 237 | * real-mode segments also allocated. |
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| 238 | */ |
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| 239 | |
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| 240 | . = 0x100000; |
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| 241 | |
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| 242 | HIDDEN(__pm_code_start = .); |
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| 243 | |
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| 244 | HIDDEN(__text_vma = .); |
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| 245 | HIDDEN(__text_lma = __pm_code_lma); |
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| 246 | .text : AT(__text_lma) { |
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| 247 | FILL(0x90909090) |
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| 248 | HIDDEN(__text_start = .); |
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| 249 | *(.text) |
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| 250 | *(.text.*) |
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| 251 | HIDDEN(__text_end = .); |
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| 252 | } |
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| 253 | |
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| 254 | . = ALIGN(16); |
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| 255 | |
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| 256 | HIDDEN(__rodata_vma = .); |
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| 257 | HIDDEN(__rodata_lma = __rodata_vma + __text_lma - __text_vma); |
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| 258 | .rodata : AT(__rodata_lma) { |
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| 259 | HIDDEN(__rodata_start = .); |
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| 260 | *(.rodata) |
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| 261 | *(.rodata.*) |
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| 262 | HIDDEN(__rodata_end = .); |
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| 263 | } |
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| 264 | |
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| 265 | . = ALIGN(4); |
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| 266 | |
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| 267 | HIDDEN(__ctors_vma = .); |
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| 268 | HIDDEN(__ctors_lma = __ctors_vma + __text_lma - __text_vma); |
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| 269 | .ctors : AT(__ctors_lma) { |
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| 270 | HIDDEN(__ctors_start = .); |
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| 271 | KEEP (*(SORT(.preinit_array*))) |
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| 272 | KEEP (*(SORT(.init_array*))) |
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| 273 | KEEP (*(SORT(.ctors*))) |
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| 274 | HIDDEN(__ctors_end = .); |
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| 275 | } |
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| 276 | |
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| 277 | HIDDEN(__dtors_vma = .); |
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| 278 | HIDDEN(__dtors_lma = __dtors_vma + __text_lma - __text_vma); |
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| 279 | .dtors : AT(__dtors_lma) { |
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| 280 | HIDDEN(__dtors_start = .); |
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| 281 | KEEP (*(SORT(.fini_array*))) |
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| 282 | KEEP (*(SORT(.dtors*))) |
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| 283 | HIDDEN(__dtors_end = .); |
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| 284 | } |
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| 285 | |
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| 286 | . = ALIGN(4); |
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| 287 | |
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| 288 | HIDDEN(__dynsym_vma = .); |
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| 289 | HIDDEN(__dynsym_lma = __dynsym_vma + __text_lma - __text_vma); |
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| 290 | .dynsym : AT(__dynsym_lma) { |
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| 291 | HIDDEN(__dynsym_start = .); |
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| 292 | *(.dynsym) |
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| 293 | HIDDEN(__dynsym_end = .); |
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| 294 | } |
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| 295 | HIDDEN(__dynsym_len = __dynsym_end - __dynsym_start); |
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| 296 | |
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| 297 | . = ALIGN(4); |
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| 298 | |
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| 299 | HIDDEN(__dynstr_vma = .); |
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| 300 | HIDDEN(__dynstr_lma = __dynstr_vma + __text_lma - __text_vma); |
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| 301 | .dynstr : AT(__dynstr_lma) { |
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| 302 | HIDDEN(__dynstr_start = .); |
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| 303 | *(.dynstr) |
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| 304 | HIDDEN(__dynstr_end = .); |
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| 305 | } |
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| 306 | HIDDEN(__dynstr_len = __dynstr_end - __dynstr_start); |
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| 307 | |
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| 308 | . = ALIGN(4); |
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| 309 | |
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| 310 | HIDDEN(__gnu_hash_vma = .); |
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| 311 | HIDDEN(__gnu_hash_lma = __gnu_hash_vma + __text_lma - __text_vma); |
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| 312 | .gnu.hash : AT(__gnu_hash_lma) { |
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| 313 | HIDDEN(__gnu_hash_start = .); |
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| 314 | *(.gnu.hash) |
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| 315 | HIDDEN(__gnu_hash_end = .); |
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| 316 | } |
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| 317 | |
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| 318 | |
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| 319 | . = ALIGN(4); |
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| 320 | |
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| 321 | HIDDEN(__dynlink_vma = .); |
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| 322 | HIDDEN(__dynlink_lma = __dynlink_vma + __text_lma - __text_vma); |
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| 323 | .dynlink : AT(__dynlink_lma) { |
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| 324 | HIDDEN(__dynlink_start = .); |
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| 325 | *(.dynlink) |
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| 326 | HIDDEN(__dynlink_end = .); |
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| 327 | } |
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| 328 | |
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| 329 | . = ALIGN(4); |
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| 330 | |
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| 331 | HIDDEN(__got_vma = .); |
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| 332 | HIDDEN(__got_lma = __got_vma + __text_lma - __text_vma); |
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| 333 | .got : AT(__got_lma) { |
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| 334 | HIDDEN(__got_start = .); |
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| 335 | KEEP (*(.got.plt)) |
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| 336 | KEEP (*(.got)) |
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| 337 | HIDDEN(__got_end = .); |
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| 338 | } |
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| 339 | |
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| 340 | . = ALIGN(4); |
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| 341 | |
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| 342 | HIDDEN(__dynamic_vma = .); |
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| 343 | HIDDEN(__dynamic_lma = __dynamic_vma + __text_lma - __text_vma); |
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| 344 | .dynamic : AT(__dynamic_lma) { |
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| 345 | HIDDEN(__dynamic_start = .); |
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| 346 | *(.dynamic) |
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| 347 | HIDDEN(__dynamic_end = .); |
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| 348 | } |
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| 349 | |
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| 350 | . = ALIGN(16); |
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| 351 | |
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| 352 | HIDDEN(__data_vma = .); |
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| 353 | HIDDEN(__data_lma = __data_vma + __text_lma - __text_vma); |
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| 354 | .data : AT(__data_lma) { |
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| 355 | HIDDEN(__data_start = .); |
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| 356 | *(.data) |
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| 357 | *(.data.*) |
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| 358 | HIDDEN(__data_end = .); |
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| 359 | } |
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| 360 | |
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| 361 | HIDDEN(__pm_code_end = .); |
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| 362 | HIDDEN(__pm_code_len = ABSOLUTE(__pm_code_end) - ABSOLUTE(__pm_code_start)); |
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| 363 | HIDDEN(__pm_code_dwords = (__pm_code_len + 3) >> 2); |
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| 364 | |
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| 365 | . = ALIGN(128); |
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| 366 | |
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| 367 | HIDDEN(__bss_vma = .); |
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| 368 | HIDDEN(__bss_lma = .); /* Dummy */ |
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| 369 | .bss (NOLOAD) : AT (__bss_lma) { |
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| 370 | HIDDEN(__bss_start = .); |
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| 371 | *(.bss) |
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| 372 | *(.bss.*) |
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| 373 | *(COMMON) |
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| 374 | HIDDEN(__bss_end = .); |
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| 375 | } |
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| 376 | HIDDEN(__bss_len = ABSOLUTE(__bss_end) - ABSOLUTE(__bss_start)); |
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| 377 | HIDDEN(__bss_dwords = (__bss_len + 3) >> 2); |
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| 378 | |
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| 379 | /* Data saved away before bss initialization */ |
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| 380 | . = ALIGN(128); |
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| 381 | |
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| 382 | HIDDEN(__savedata_vma = .); |
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| 383 | HIDDEN(__savedata_lma = .); /* Dummy */ |
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| 384 | .savedata (NOLOAD) : AT (__savedata_lma) { |
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| 385 | HIDDEN(__savedata_start = .); |
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| 386 | *(.savedata) |
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| 387 | *(.savedata.*) |
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| 388 | HIDDEN(__savedata_end = .); |
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| 389 | } |
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| 390 | HIDDEN(__savedata_len = ABSOLUTE(__savedata_end) - ABSOLUTE(__savedata_start)); |
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| 391 | HIDDEN(__savedata_dwords = (__savedata_len + 3) >> 2); |
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| 392 | |
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| 393 | /* XXX: This stack should be unified with the COM32 stack */ |
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| 394 | HIDDEN(__stack_vma = .); |
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| 395 | __stack_lma = .; /* Dummy */ |
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| 396 | .stack (NOLOAD) : AT(__stack_lma) { |
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| 397 | HIDDEN(__stack_start = .); |
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| 398 | *(.stack) |
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| 399 | HIDDEN(__stack_end = .); |
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| 400 | } |
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| 401 | HIDDEN(__stack_len = ABSOLUTE(__stack_end) - ABSOLUTE(__stack_start)); |
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| 402 | HIDDEN(__stack_dwords = (__stack_len + 3) >> 2); |
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| 403 | |
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| 404 | HIDDEN(_end = .); |
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| 405 | |
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| 406 | /* Heap follows after our own PM code */ |
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| 407 | . = ALIGN(65536); |
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| 408 | HIDDEN(free_high_memory = .); |
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| 409 | |
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| 410 | /* Stuff we don't need... */ |
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| 411 | /DISCARD/ : { |
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| 412 | *(.eh_frame) |
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| 413 | } |
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| 414 | } |
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