1/* 2 * ld script to make ARM Linux kernel 3 * taken from the i386 version by Russell King 4 * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz> 5 */ 6 7#include <asm-generic/vmlinux.lds.h> 8#include <asm/thread_info.h> 9#include <asm/memory.h> 10#include <asm/page.h> 11#include <asm/pgtable.h> 12 13#include "image.h" 14 15/* .exit.text needed in case of alternative patching */ 16#define ARM_EXIT_KEEP(x) x 17#define ARM_EXIT_DISCARD(x) 18 19OUTPUT_ARCH(aarch64) 20ENTRY(_text) 21 22jiffies = jiffies_64; 23 24#define HYPERVISOR_TEXT \ 25 /* \ 26 * Force the alignment to be compatible with \ 27 * the vectors requirements \ 28 */ \ 29 . = ALIGN(2048); \ 30 VMLINUX_SYMBOL(__hyp_idmap_text_start) = .; \ 31 *(.hyp.idmap.text) \ 32 VMLINUX_SYMBOL(__hyp_idmap_text_end) = .; \ 33 VMLINUX_SYMBOL(__hyp_text_start) = .; \ 34 *(.hyp.text) \ 35 VMLINUX_SYMBOL(__hyp_text_end) = .; 36 37/* 38 * The size of the PE/COFF section that covers the kernel image, which 39 * runs from stext to _edata, must be a round multiple of the PE/COFF 40 * FileAlignment, which we set to its minimum value of 0x200. 'stext' 41 * itself is 4 KB aligned, so padding out _edata to a 0x200 aligned 42 * boundary should be sufficient. 43 */ 44PECOFF_FILE_ALIGNMENT = 0x200; 45 46#ifdef CONFIG_EFI 47#define PECOFF_EDATA_PADDING \ 48 .pecoff_edata_padding : { BYTE(0); . = ALIGN(PECOFF_FILE_ALIGNMENT); } 49#else 50#define PECOFF_EDATA_PADDING 51#endif 52 53#ifdef CONFIG_DEBUG_ALIGN_RODATA 54#define ALIGN_DEBUG_RO . = ALIGN(1<<SECTION_SHIFT); 55#define ALIGN_DEBUG_RO_MIN(min) ALIGN_DEBUG_RO 56#else 57#define ALIGN_DEBUG_RO 58#define ALIGN_DEBUG_RO_MIN(min) . = ALIGN(min); 59#endif 60 61SECTIONS 62{ 63 /* 64 * XXX: The linker does not define how output sections are 65 * assigned to input sections when there are multiple statements 66 * matching the same input section name. There is no documented 67 * order of matching. 68 */ 69 /DISCARD/ : { 70 ARM_EXIT_DISCARD(EXIT_TEXT) 71 ARM_EXIT_DISCARD(EXIT_DATA) 72 EXIT_CALL 73 *(.discard) 74 *(.discard.*) 75 } 76 77 . = PAGE_OFFSET + TEXT_OFFSET; 78 79 .head.text : { 80 _text = .; 81 HEAD_TEXT 82 } 83 ALIGN_DEBUG_RO 84 .text : { /* Real text segment */ 85 _stext = .; /* Text and read-only data */ 86 __exception_text_start = .; 87 *(.exception.text) 88 __exception_text_end = .; 89 IRQENTRY_TEXT 90 TEXT_TEXT 91 SCHED_TEXT 92 LOCK_TEXT 93 HYPERVISOR_TEXT 94 *(.fixup) 95 *(.gnu.warning) 96 . = ALIGN(16); 97 *(.got) /* Global offset table */ 98 } 99 100 ALIGN_DEBUG_RO 101 RO_DATA(PAGE_SIZE) 102 EXCEPTION_TABLE(8) 103 NOTES 104 ALIGN_DEBUG_RO 105 _etext = .; /* End of text and rodata section */ 106 107 ALIGN_DEBUG_RO_MIN(PAGE_SIZE) 108 __init_begin = .; 109 110 INIT_TEXT_SECTION(8) 111 .exit.text : { 112 ARM_EXIT_KEEP(EXIT_TEXT) 113 } 114 115 ALIGN_DEBUG_RO_MIN(16) 116 .init.data : { 117 INIT_DATA 118 INIT_SETUP(16) 119 INIT_CALLS 120 CON_INITCALL 121 SECURITY_INITCALL 122 INIT_RAM_FS 123 } 124 .exit.data : { 125 ARM_EXIT_KEEP(EXIT_DATA) 126 } 127 128 PERCPU_SECTION(64) 129 130 . = ALIGN(PAGE_SIZE); 131 __init_end = .; 132 133 . = ALIGN(4); 134 .altinstructions : { 135 __alt_instructions = .; 136 *(.altinstructions) 137 __alt_instructions_end = .; 138 } 139 .altinstr_replacement : { 140 *(.altinstr_replacement) 141 } 142 143 . = ALIGN(PAGE_SIZE); 144 _data = .; 145 _sdata = .; 146 RW_DATA_SECTION(64, PAGE_SIZE, THREAD_SIZE) 147 PECOFF_EDATA_PADDING 148 _edata = .; 149 150 BSS_SECTION(0, 0, 0) 151 152 . = ALIGN(PAGE_SIZE); 153 idmap_pg_dir = .; 154 . += IDMAP_DIR_SIZE; 155 swapper_pg_dir = .; 156 . += SWAPPER_DIR_SIZE; 157 158 _end = .; 159 160 STABS_DEBUG 161 162 HEAD_SYMBOLS 163} 164 165/* 166 * The HYP init code can't be more than a page long. 167 */ 168ASSERT(((__hyp_idmap_text_start + PAGE_SIZE) > __hyp_idmap_text_end), 169 "HYP init code too big") 170 171/* 172 * If padding is applied before .head.text, virt<->phys conversions will fail. 173 */ 174ASSERT(_text == (PAGE_OFFSET + TEXT_OFFSET), "HEAD is misaligned") 175