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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/powerpc/boot/elf_util.c
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// SPDX-License-Identifier: GPL-2.0-or-later

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/*

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 * Copyright (C) Paul Mackerras 1997.

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 *

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 * Updates for PPC64 by Todd Inglett, Dave Engebretsen & Peter Bergner.

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 */

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#include <stdarg.h>

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#include <stddef.h>

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#include "elf.h"

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#include "page.h"

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#include "string.h"

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#include "stdio.h"

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int parse_elf64(void *hdr, struct elf_info *info)

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{

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	Elf64_Ehdr *elf64 = hdr;

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	Elf64_Phdr *elf64ph;

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	unsigned int i;

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	if (!(elf64->e_ident[EI_MAG0]  == ELFMAG0	&&

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	      elf64->e_ident[EI_MAG1]  == ELFMAG1	&&

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	      elf64->e_ident[EI_MAG2]  == ELFMAG2	&&

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	      elf64->e_ident[EI_MAG3]  == ELFMAG3	&&

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	      elf64->e_ident[EI_CLASS] == ELFCLASS64	&&

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#ifdef __LITTLE_ENDIAN__

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	      elf64->e_ident[EI_DATA]  == ELFDATA2LSB	&&

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#else

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	      elf64->e_ident[EI_DATA]  == ELFDATA2MSB	&&

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#endif

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	      (elf64->e_type            == ET_EXEC ||

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	       elf64->e_type            == ET_DYN)	&&

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	      elf64->e_machine         == EM_PPC64))

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		return 0;

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	elf64ph = (Elf64_Phdr *)((unsigned long)elf64 +

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				 (unsigned long)elf64->e_phoff);

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	for (i = 0; i < (unsigned int)elf64->e_phnum; i++, elf64ph++)

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		if (elf64ph->p_type == PT_LOAD)

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			break;

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	if (i >= (unsigned int)elf64->e_phnum)

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		return 0;

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	info->loadsize = (unsigned long)elf64ph->p_filesz;

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	info->memsize = (unsigned long)elf64ph->p_memsz;

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	info->elfoffset = (unsigned long)elf64ph->p_offset;

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	return 1;

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}

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int parse_elf32(void *hdr, struct elf_info *info)

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{

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	Elf32_Ehdr *elf32 = hdr;

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	Elf32_Phdr *elf32ph;

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	unsigned int i;

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	if (!(elf32->e_ident[EI_MAG0]  == ELFMAG0	&&

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	      elf32->e_ident[EI_MAG1]  == ELFMAG1	&&

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	      elf32->e_ident[EI_MAG2]  == ELFMAG2	&&

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	      elf32->e_ident[EI_MAG3]  == ELFMAG3	&&

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	      elf32->e_ident[EI_CLASS] == ELFCLASS32	&&

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	      elf32->e_ident[EI_DATA]  == ELFDATA2MSB	&&

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	      (elf32->e_type            == ET_EXEC ||

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	       elf32->e_type            == ET_DYN)      &&

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	      elf32->e_machine         == EM_PPC))

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		return 0;

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	elf32ph = (Elf32_Phdr *) ((unsigned long)elf32 + elf32->e_phoff);

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	for (i = 0; i < elf32->e_phnum; i++, elf32ph++)

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		if (elf32ph->p_type == PT_LOAD)

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			break;

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	if (i >= elf32->e_phnum)

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		return 0;

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	info->loadsize = elf32ph->p_filesz;

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	info->memsize = elf32ph->p_memsz;

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	info->elfoffset = elf32ph->p_offset;

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	return 1;

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}

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