// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (C) Paul Mackerras 1997.
 *
 * Updates for PPC64 by Todd Inglett, Dave Engebretsen & Peter Bergner.
 */
#include <stdarg.h>
#include <stddef.h>
#include "elf.h"
#include "page.h"
#include "string.h"
#include "stdio.h"

int parse_elf64(void *hdr, struct elf_info *info)
{
        Elf64_Ehdr *elf64 = hdr;
        Elf64_Phdr *elf64ph;
        unsigned int i;

        if (!(elf64->e_ident[EI_MAG0]  == ELFMAG0       &&
              elf64->e_ident[EI_MAG1]  == ELFMAG1       &&
              elf64->e_ident[EI_MAG2]  == ELFMAG2       &&
              elf64->e_ident[EI_MAG3]  == ELFMAG3       &&
              elf64->e_ident[EI_CLASS] == ELFCLASS64    &&
#ifdef __LITTLE_ENDIAN__
              elf64->e_ident[EI_DATA]  == ELFDATA2LSB   &&
#else
              elf64->e_ident[EI_DATA]  == ELFDATA2MSB   &&
#endif
              (elf64->e_type            == ET_EXEC ||
               elf64->e_type            == ET_DYN)      &&
              elf64->e_machine         == EM_PPC64))
                return 0;

        elf64ph = (Elf64_Phdr *)((unsigned long)elf64 +
                                 (unsigned long)elf64->e_phoff);
        for (i = 0; i < (unsigned int)elf64->e_phnum; i++, elf64ph++)
                if (elf64ph->p_type == PT_LOAD)
                        break;
        if (i >= (unsigned int)elf64->e_phnum)
                return 0;

        info->loadsize = (unsigned long)elf64ph->p_filesz;
        info->memsize = (unsigned long)elf64ph->p_memsz;
        info->elfoffset = (unsigned long)elf64ph->p_offset;

        return 1;
}

int parse_elf32(void *hdr, struct elf_info *info)
{
        Elf32_Ehdr *elf32 = hdr;
        Elf32_Phdr *elf32ph;
        unsigned int i;

        if (!(elf32->e_ident[EI_MAG0]  == ELFMAG0       &&
              elf32->e_ident[EI_MAG1]  == ELFMAG1       &&
              elf32->e_ident[EI_MAG2]  == ELFMAG2       &&
              elf32->e_ident[EI_MAG3]  == ELFMAG3       &&
              elf32->e_ident[EI_CLASS] == ELFCLASS32    &&
              elf32->e_ident[EI_DATA]  == ELFDATA2MSB   &&
              (elf32->e_type            == ET_EXEC ||
               elf32->e_type            == ET_DYN)      &&
              elf32->e_machine         == EM_PPC))
                return 0;

        elf32ph = (Elf32_Phdr *) ((unsigned long)elf32 + elf32->e_phoff);
        for (i = 0; i < elf32->e_phnum; i++, elf32ph++)
                if (elf32ph->p_type == PT_LOAD)
                        break;
        if (i >= elf32->e_phnum)
                return 0;

        info->loadsize = elf32ph->p_filesz;
        info->memsize = elf32ph->p_memsz;
        info->elfoffset = elf32ph->p_offset;
        return 1;
}