source: mainline/kernel/arch/ia32/_link.ld.in@ c4d11c5

/** IA-32 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 {
        .unmapped BOOT_OFFSET: AT (0) {
                unmapped_ktext_start = .;
                *(K_TEXT_START);
                unmapped_ktext_end = .;
        
                unmapped_kdata_start = .;
                *(K_DATA_START);
                unmapped_kdata_end = .;
        }
        
        .mapped (PA2KA(BOOT_OFFSET)+SIZEOF(.unmapped)): AT (SIZEOF(.unmapped)) { 
                ktext_start = .;
                *(.text);
                ktext_end = .;
                
                kdata_start = .;
                *(.data);               /* initialized data */
                *(.rodata*);            /* string literals */
                *(COMMON);              /* global variables */
                hardcoded_load_address = .;
                LONG(PA2KA(BOOT_OFFSET));
                hardcoded_ktext_size = .;
                LONG((ktext_end - ktext_start) + (unmapped_ktext_end - unmapped_ktext_start));
                hardcoded_kdata_size = .;
                LONG((kdata_end - kdata_start) + (unmapped_kdata_end - unmapped_kdata_start));
                hardcoded_unmapped_ktext_size = .;
                LONG(unmapped_ktext_end - unmapped_ktext_start);
                hardcoded_unmapped_kdata_size = .;
                LONG(unmapped_kdata_end - unmapped_kdata_start);
                symbol_table = .;
                *(symtab.*);            /* Symbol table, must be LAST symbol! */
                *(.bss);                /* uninitialized static variables */
                kdata_end = .;
        }
        
        /DISCARD/ : {
                *(.note.GNU-stack);
                *(.comment);
        }
        
#ifdef CONFIG_SMP
        
        _hardcoded_unmapped_size = (unmapped_ktext_end - unmapped_ktext_start) + (unmapped_kdata_end - unmapped_kdata_start);
        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 */
        
}