source: mainline/kernel/arch/amd64/_link.ld.in

/** AMD64 linker script
 *
 * umapped section:
 *  kernel text
 *  kernel data
 * mapped section:
 *  kernel text
 *  kernel data
 */

#include <arch/boot/boot.h>
#include <arch/mm/page.h>

SECTIONS {
        kernel_load_address = PA2KA(BOOT_OFFSET);

        .unmapped (BOOT_OFFSET + SIZEOF_HEADERS): AT (BOOT_OFFSET + SIZEOF_HEADERS) {
                unmapped_start = .;
                KEEP(*(K_TEXT_START));
                KEEP(*(K_DATA_START));
                KEEP(*(K_INI_PTLS));
                unmapped_end = .;
        }

        .text (PA2KA(BOOT_OFFSET) + SIZEOF_HEADERS + SIZEOF(.unmapped)) : AT (BOOT_OFFSET + SIZEOF_HEADERS + SIZEOF(.unmapped)) {
                ktext_start = .;
                *(.text .text.*);
                ktext_end = .;
        }

        /* stack unwinding data */
        .eh_frame_hdr : {
                eh_frame_hdr_start = .;
                *(.eh_frame_hdr) *(.eh_frame_entry .eh_frame_entry.*);
                eh_frame_hdr_end = .;
        }
        .eh_frame : {
                eh_frame_start = .;
                KEEP(*(.eh_frame .eh_frame.*));
                eh_frame_end = .;
        }

        .data : {
                kdata_start = .;
                *(.rodata .rodata.*);  /* read-only global variables */
                *(.data .data.*);      /* non-zero initialized global variables */

                /*
                 * When .bss is not physically present in the ELF file (MemSz > FileSz)
                 * the kernel crashes during early boot. Not sure which part of the
                 * boot process is to blame, for now just keep .bss packaged with .data
                 * so that FileSz == MemSz.
                 */

                 *(.bss .bss.*);        /* uninitialized global variables */
                *(COMMON);             /* non-`static` global variables without an extern declaration */
                kdata_end = .;
        }

        .comment 0 : { *(.comment); }
        .debug_abbrev 0 : { *(.debug_abbrev); }
        .debug_abbrev.dwo 0 : { *(      .debug_abbrev.dwo); }
        .debug_addr 0 : { *(.debug_addr); }
        .debug_aranges 0 : { *(.debug_aranges); }
        .debug_cu_index 0 : { *(.debug_cu_index); }
        .debug_frame 0 : { *(.debug_frame); }
        .debug_frame_hdr 0 : { *(.debug_frame_hdr); }
        .debug_info 0 : { *(.debug_info); }
        .debug_info.dwo 0 : { *(.debug_info.dwo); }
        .debug_line 0 : { *(.debug_line); }
        .debug_line.dwo 0 : { *(.debug_line.dwo); }
        .debug_line_str 0 : { *(.debug_line_str); }
        .debug_loc 0 : { *(.debug_loc); }
        .debug_loclists 0 : { *(.debug_loclists); }
        .debug_loclists.dwo 0 : { *(.debug_loclists.dwo); }
        .debug_macinfo 0 : { *(.debug_macinfo); }
        .debug_macro 0 : { *(.debug_macro); }
        .debug_macro.dwo 0 : { *(.debug_macro.dwo); }
        .debug_names 0 : { *(.debug_names); }
        .debug_pubnames 0 : { *(.debug_pubnames); }
        .debug_pubtypes 0 : { *(.debug_pubtypes); }
        .debug_ranges 0 : { *(.debug_ranges); }
        .debug_rnglists 0 : { *(.debug_rnglists); }
        .debug_str 0 : { *(.debug_str); }
        .debug_str.dwo 0 : { *(.debug_str.dwo); }
        .debug_str_offsets 0 : { *(.debug_str_offsets); }
        .debug_str_offsets.dwo 0 : { *(.debug_str_offsets.dwo); }
        .debug_tu_index 0 : { *(.debug_tu_index); }
        .debug_types 0 : { *(.debug_types); }

        /DISCARD/ : {
                *(*);
        }

#ifdef CONFIG_SMP
        ap_boot = unmapped_ap_boot - BOOT_OFFSET + AP_BOOT_OFFSET;
        ap_gdtr = unmapped_ap_gdtr - BOOT_OFFSET + AP_BOOT_OFFSET;
        protected_ap_gdtr = PA2KA(ap_gdtr);
#endif /* CONFIG_SMP */

}