kernel-fxtec-pro1x/arch/arm64/kernel/efi-stub.c
Ard Biesheuvel ddeeefe2df arm64/efi: efistub: Apply __init annotation
This ensures all stub component are freed when the kernel proper is
done booting, by prefixing the names of all ELF sections that have
the SHF_ALLOC attribute with ".init". This approach ensures that even
implicitly emitted allocated data (like initializer values and string
literals) are covered.

At the same time, remove some __init annotations in the stub that have
now become redundant, and add the __init annotation to handle_kernel_image
which will now trigger a section mismatch warning without it.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
2015-01-15 21:28:35 +00:00

45 lines
1.4 KiB
C

/*
* Copyright (C) 2013, 2014 Linaro Ltd; <roy.franz@linaro.org>
*
* This file implements the EFI boot stub for the arm64 kernel.
* Adapted from ARM version by Mark Salter <msalter@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/efi.h>
#include <asm/efi.h>
#include <asm/sections.h>
efi_status_t __init handle_kernel_image(efi_system_table_t *sys_table,
unsigned long *image_addr,
unsigned long *image_size,
unsigned long *reserve_addr,
unsigned long *reserve_size,
unsigned long dram_base,
efi_loaded_image_t *image)
{
efi_status_t status;
unsigned long kernel_size, kernel_memsize = 0;
/* Relocate the image, if required. */
kernel_size = _edata - _text;
if (*image_addr != (dram_base + TEXT_OFFSET)) {
kernel_memsize = kernel_size + (_end - _edata);
status = efi_low_alloc(sys_table, kernel_memsize + TEXT_OFFSET,
SZ_2M, reserve_addr);
if (status != EFI_SUCCESS) {
pr_efi_err(sys_table, "Failed to relocate kernel\n");
return status;
}
memcpy((void *)*reserve_addr + TEXT_OFFSET, (void *)*image_addr,
kernel_size);
*image_addr = *reserve_addr + TEXT_OFFSET;
*reserve_size = kernel_memsize + TEXT_OFFSET;
}
return EFI_SUCCESS;
}