libkernaux/examples/bootloader-stivale2-limine/linker.ld

/* Tell the linker that we want an x86_64 ELF64 output file */
OUTPUT_FORMAT(elf64-x86-64)
OUTPUT_ARCH(i386:x86-64)
 
/* We want the symbol _start to be our entry point */
ENTRY(_start)
 
/* Define the program headers we want so the bootloader gives us the right */
/* MMU permissions */
PHDRS
{
    null    PT_NULL    FLAGS(0) ;                   /* Null segment */
    text    PT_LOAD    FLAGS((1 << 0) | (1 << 2)) ; /* Execute + Read */
    rodata  PT_LOAD    FLAGS((1 << 2)) ;            /* Read only */
    data    PT_LOAD    FLAGS((1 << 1) | (1 << 2)) ; /* Write + Read */
}
 
SECTIONS
{
    /* We wanna be placed in the topmost 2GiB of the address space, for optimisations */
    /* and because that is what the stivale2 spec mandates. */
    /* Any address in this region will do, but often 0xffffffff80000000 is chosen as */
    /* that is the beginning of the region. */
    . = 0xffffffff80000000;
 
    .text : {
        *(.text .text.*)
    } :text
 
    /* Move to the next memory page for .rodata */
    . += CONSTANT(MAXPAGESIZE);
 
    /* We place the .stivale2hdr section containing the header in its own section, */
    /* and we use the KEEP directive on it to make sure it doesn't get discarded. */
    .stivale2hdr : {
        KEEP(*(.stivale2hdr))
    } :rodata
 
    .rodata : {
        *(.rodata .rodata.*)
    } :rodata
 
    /* Move to the next memory page for .data */
    . += CONSTANT(MAXPAGESIZE);
 
    .data : {
        *(.data .data.*)
    } :data
 
    .bss : {
        *(COMMON)
        *(.bss .bss.*)
    } :data
}