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/*
* ARM64 binary image support.
* Copyright (C) 2014 Linaro.
*/
#if !defined(__ARM64_IMAGE_HEADER_H)
#define __ARM64_IMAGE_HEADER_H
#if !defined(__KERNEL__)
#include <stdint.h>
#endif
#if !defined(__ASSEMBLY__)
/**
* struct arm64_image_header - arm64 kernel image header.
*
* @pe_sig: Optional PE format 'MZ' signature.
* @branch_code: Reserved for instructions to branch to stext.
* @text_offset: The image load offset in LSB byte order.
* @image_size: An estimated size of the memory image size in LSB byte order.
* @flags: Bit flags:
* Bit 7.0: Image byte order, 1=MSB.
* @reserved_1: Reserved.
* @magic: Magic number, "ARM\x64".
* @pe_header: Optional offset to a PE format header.
**/
struct arm64_image_header {
uint8_t pe_sig[2];
uint16_t branch_code[3];
uint64_t text_offset;
uint64_t image_size;
uint8_t flags[8];
uint64_t reserved_1[3];
uint8_t magic[4];
uint32_t pe_header;
};
static const uint8_t arm64_image_magic[4] = {'A', 'R', 'M', 0x64U};
static const uint8_t arm64_image_pe_sig[2] = {'M', 'Z'};
static const uint64_t arm64_image_flag_7_be = 0x01U;
/**
* arm64_header_check_magic - Helper to check the arm64 image header.
*
* Returns non-zero if header is OK.
*/
static inline int arm64_header_check_magic(const struct arm64_image_header *h)
{
if (!h)
return 0;
if (!h->text_offset)
return 0;
return (h->magic[0] == arm64_image_magic[0]
&& h->magic[1] == arm64_image_magic[1]
&& h->magic[2] == arm64_image_magic[2]
&& h->magic[3] == arm64_image_magic[3]);
}
/**
* arm64_header_check_pe_sig - Helper to check the arm64 image header.
*
* Returns non-zero if 'MZ' signature is found.
*/
static inline int arm64_header_check_pe_sig(const struct arm64_image_header *h)
{
if (!h)
return 0;
return (h->pe_sig[0] == arm64_image_pe_sig[0]
&& h->pe_sig[1] == arm64_image_pe_sig[1]);
}
/**
* arm64_header_check_msb - Helper to check the arm64 image header.
*
* Returns non-zero if the image was built as big endian.
*/
static inline int arm64_header_check_msb(const struct arm64_image_header *h)
{
if (!h)
return 0;
return !!(h->flags[7] & arm64_image_flag_7_be);
}
#endif /* !defined(__ASSEMBLY__) */
#endif
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