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 = .;
}