| 1 | /** AMD64 linker script
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| 2 | *
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| 3 | * umapped section:
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| 4 | * kernel text
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| 5 | * kernel data
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| 6 | * mapped section:
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| 7 | * kernel text
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| 8 | * kernel data
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| 9 | */
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| 10 |
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| 11 | #define __ASM__
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| 12 | #include <arch/boot/boot.h>
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| 13 | #include <arch/mm/page.h>
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| 14 |
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| 15 | OUTPUT_FORMAT(BFD)
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| 16 | ENTRY(kernel_image_start)
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| 17 |
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| 18 | SECTIONS {
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| 19 | .unmapped BOOTSTRAP_OFFSET: AT (BOOTSTRAP_OFFSET) {
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| 20 | unmapped_ktext_start = .;
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| 21 | *(K_TEXT_START);
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| 22 | *(K_TEXT_START_2);
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| 23 | unmapped_ktext_end = .;
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| 24 |
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| 25 | unmapped_kdata_start = .;
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| 26 | *(K_DATA_START);
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| 27 | unmapped_kdata_end = .;
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| 28 | }
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| 29 |
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| 30 | .mapped (PA2KA(BOOT_OFFSET+BOOTSTRAP_OFFSET)+SIZEOF(.unmapped)) : AT (BOOTSTRAP_OFFSET+SIZEOF(.unmapped)) {
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| 31 | ktext_start = .;
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| 32 | *(BOOT_DATA);
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| 33 | *(.text);
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| 34 | ktext_end = .;
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| 35 |
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| 36 | kdata_start = .;
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| 37 | *(.data); /* initialized data */
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| 38 | *(.rodata*); /* string literals */
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| 39 | hardcoded_load_address = .;
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| 40 | QUAD(PA2KA(BOOT_OFFSET+BOOTSTRAP_OFFSET));
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| 41 | hardcoded_ktext_size = .;
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| 42 | QUAD(ktext_end - ktext_start + (unmapped_ktext_end - unmapped_ktext_start));
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| 43 | hardcoded_kdata_size = .;
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| 44 | QUAD(kdata_end - kdata_start + (unmapped_kdata_end - unmapped_kdata_start));
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| 45 | hardcoded_unmapped_ktext_size = .;
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| 46 | LONG(unmapped_ktext_end - unmapped_ktext_start);
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| 47 | hardcoded_unmapped_kdata_size = .;
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| 48 | LONG(unmapped_kdata_end - unmapped_kdata_start);
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| 49 | *(COMMON); /* global variables */
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| 50 |
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| 51 | *(.eh_frame);
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| 52 | *(.bss); /* uninitialized static variables */
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| 53 |
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| 54 | symbol_table = .;
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| 55 | *(symtab.*); /* Symbol table, must be LAST symbol!*/
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| 56 |
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| 57 | kdata_end = .;
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| 58 | }
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| 59 |
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| 60 | _hardcoded_kernel_size = (ktext_end - ktext_start) + (unmapped_ktext_end - unmapped_ktext_start) + (kdata_end - kdata_start) + (unmapped_kdata_end - unmapped_kdata_start);
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| 61 |
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| 62 | /* Symbols that need to be accessed both from real mode & long mode */
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| 63 | /* e820*_boot is real mode (pre-above-1MB-move), e820* is */
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| 64 | /* kernel mapped above-1MB-physical copied symbol */
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| 65 | e820table_boot = KA2PA(e820table) - BOOT_OFFSET;
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| 66 | e820counter_boot = KA2PA(e820counter) - BOOT_OFFSET;
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| 67 |
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| 68 | /* real_bootstrap_gdtr is mapped real_bootstrap_gdtr_boot */
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| 69 | /* It is physically outside of kernel area, we have to access */
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| 70 | /* it after modification from long mode for booting */
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| 71 | /* SMP slave processors */
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| 72 | real_bootstrap_gdtr = PA2KA(real_bootstrap_gdtr_boot);
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| 73 | }
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