Subversion Repositories c0or1k

/*

 * Simple linker script

 *

 * Copyright (C) 2007 Bahadir Balban

 */

/* FIXME:

 * Currently we can't include cpp #defines in linker script.

 * Check that below offsets are coherent with offsets.h

 */

kernel_offset           = 0xF0000000;

kernel_physical         = 0x8000;

kernel_virtual          = kernel_physical + kernel_offset;

/* A temporary boot stack is used before a proper kernel stack is set up */

_bootstack_physical     = _bootstack - kernel_offset;

/* The symbols are linked at virtual addresses. So is _start.

 * We must set the entry point to a physical address, so that

 * when the image is loaded, it doesn't jump to a non existing

 * virtual address.

 */

ENTRY(kernel_physical)

SECTIONS

{

        . = kernel_virtual;

        _start_kernel = .;

        .text : AT (ADDR(.text) - kernel_offset)

        {

                _start_text = .;

                /* Make sure head.S comes first */

                /* *head.o(.text) This only works when given its full path. Bad limitation. */

                *(.text.head)

                *(.text)

                _end_text = .;

        }

        . = ALIGN(4);

        /* rodata is needed else your strings will link at physical! */

        .rodata : AT (ADDR(.rodata) - kernel_offset) { *(.rodata) }

        .rodata1 : AT (ADDR(.rodata1) - kernel_offset) { *(.rodata1) }

        .data : AT (ADDR(.data) - kernel_offset)

        {

                _start_data = .;

                *(.data)

                _start_vectors = .;

                *(.data.vectors)

                . = ALIGN(4K);

                _end_vectors = .;

                _start_kip = .;

                *(.data.kip)

                . = ALIGN(4K);

                _end_kip = .;

                _start_syscalls = .;

                *(.data.syscalls)

                . = ALIGN(4K);

                _end_syscalls = .;

                _end_data = .;

        }

        .bss : AT (ADDR(.bss) - kernel_offset)

        {

                *(.bss)

        }

        . = ALIGN(4K);

        . += 0x2000;            /* This is required as the link counter does not seem

                                 * to increment for the bss section

                                 * TODO: Change this with PAGE_SIZE */

        /* Below part is to be discarded after boot */

        _start_init = .;

        .init : AT (ADDR(.init) - kernel_offset)

        {

                . = ALIGN(16K); /* For initial pgd */

                *(.init.pgd)

                *(.init.bootmem)

                *(.init.data)

        }

        /* Space for boot stack */

        . += 0x1000;

        . = ALIGN(4K);  /* A page aligned stack of at least 4KB */

        _end_init = .;

        _bootstack = .;

        _end_kernel = .;

        _end = .;

}