cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

elf_util.c (2217B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * Copyright (C) Paul Mackerras 1997.
      4 *
      5 * Updates for PPC64 by Todd Inglett, Dave Engebretsen & Peter Bergner.
      6 */
      7#include <stdarg.h>
      8#include <stddef.h>
      9#include "elf.h"
     10#include "page.h"
     11#include "string.h"
     12#include "stdio.h"
     13
     14int parse_elf64(void *hdr, struct elf_info *info)
     15{
     16	Elf64_Ehdr *elf64 = hdr;
     17	Elf64_Phdr *elf64ph;
     18	unsigned int i;
     19
     20	if (!(elf64->e_ident[EI_MAG0]  == ELFMAG0	&&
     21	      elf64->e_ident[EI_MAG1]  == ELFMAG1	&&
     22	      elf64->e_ident[EI_MAG2]  == ELFMAG2	&&
     23	      elf64->e_ident[EI_MAG3]  == ELFMAG3	&&
     24	      elf64->e_ident[EI_CLASS] == ELFCLASS64	&&
     25#ifdef __LITTLE_ENDIAN__
     26	      elf64->e_ident[EI_DATA]  == ELFDATA2LSB	&&
     27#else
     28	      elf64->e_ident[EI_DATA]  == ELFDATA2MSB	&&
     29#endif
     30	      (elf64->e_type            == ET_EXEC ||
     31	       elf64->e_type            == ET_DYN)	&&
     32	      elf64->e_machine         == EM_PPC64))
     33		return 0;
     34
     35	elf64ph = (Elf64_Phdr *)((unsigned long)elf64 +
     36				 (unsigned long)elf64->e_phoff);
     37	for (i = 0; i < (unsigned int)elf64->e_phnum; i++, elf64ph++)
     38		if (elf64ph->p_type == PT_LOAD)
     39			break;
     40	if (i >= (unsigned int)elf64->e_phnum)
     41		return 0;
     42
     43	info->loadsize = (unsigned long)elf64ph->p_filesz;
     44	info->memsize = (unsigned long)elf64ph->p_memsz;
     45	info->elfoffset = (unsigned long)elf64ph->p_offset;
     46
     47	return 1;
     48}
     49
     50int parse_elf32(void *hdr, struct elf_info *info)
     51{
     52	Elf32_Ehdr *elf32 = hdr;
     53	Elf32_Phdr *elf32ph;
     54	unsigned int i;
     55
     56	if (!(elf32->e_ident[EI_MAG0]  == ELFMAG0	&&
     57	      elf32->e_ident[EI_MAG1]  == ELFMAG1	&&
     58	      elf32->e_ident[EI_MAG2]  == ELFMAG2	&&
     59	      elf32->e_ident[EI_MAG3]  == ELFMAG3	&&
     60	      elf32->e_ident[EI_CLASS] == ELFCLASS32	&&
     61	      elf32->e_ident[EI_DATA]  == ELFDATA2MSB	&&
     62	      (elf32->e_type            == ET_EXEC ||
     63	       elf32->e_type            == ET_DYN)      &&
     64	      elf32->e_machine         == EM_PPC))
     65		return 0;
     66
     67	elf32ph = (Elf32_Phdr *) ((unsigned long)elf32 + elf32->e_phoff);
     68	for (i = 0; i < elf32->e_phnum; i++, elf32ph++)
     69		if (elf32ph->p_type == PT_LOAD)
     70			break;
     71	if (i >= elf32->e_phnum)
     72		return 0;
     73
     74	info->loadsize = elf32ph->p_filesz;
     75	info->memsize = elf32ph->p_memsz;
     76	info->elfoffset = elf32ph->p_offset;
     77	return 1;
     78}