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