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/*
* This file is licensed under the terms of the GNU General Public License,
* version 2. See the file COPYING in the main directory for details.
*
* Copyright (C) 2002,2003 Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de>
*/
#include <elf.h>
#include "delo.h"
#include "stringops.h"
static void *loadelf32(Elf32_Ehdr *ehdr)
{
int i;
if (!(ehdr->e_type == ET_EXEC
&& ehdr->e_machine == EM_MIPS
&& ehdr->e_version == EV_CURRENT))
return NULL;
for(i = 0; i < ehdr->e_phnum; i++) {
Elf32_Phdr phdr;
if (delo_read(&phdr, ehdr->e_phoff + i * sizeof(phdr),
sizeof(phdr), 0))
return NULL;
if (phdr.p_type == PT_LOAD) {
if (delo_read((void *)phdr.p_vaddr, phdr.p_offset,
phdr.p_filesz, 1))
return NULL;
}
}
return (void *)ehdr->e_entry;
}
static void *loadelf64(Elf64_Ehdr *ehdr)
{
int i;
if (!(ehdr->e_type == ET_EXEC
&& ehdr->e_machine == EM_MIPS
&& ehdr->e_version == EV_CURRENT))
return NULL;
for(i = 0; i < ehdr->e_phnum; i++) {
Elf64_Phdr phdr;
if (delo_read(&phdr, ehdr->e_phoff + i * sizeof(phdr),
sizeof(phdr), 0))
return NULL;
if (phdr.p_type == PT_LOAD) {
if (delo_read((void *)(unsigned int)phdr.p_vaddr,
phdr.p_offset, phdr.p_filesz, 1))
return NULL;
}
}
return (void *)(unsigned int)ehdr->e_entry;
}
void *loadelf(void)
{
union {
Elf32_Ehdr s;
Elf64_Ehdr b;
} ehdr;
if (delo_read(&ehdr, 0, sizeof(ehdr), 0))
return NULL;
if (!(ehdr.s.e_ident[EI_MAG0] == ELFMAG0
&& ehdr.s.e_ident[EI_MAG1] == ELFMAG1
&& ehdr.s.e_ident[EI_MAG2] == ELFMAG2
&& ehdr.s.e_ident[EI_MAG3] == ELFMAG3
&& (ehdr.s.e_ident[EI_CLASS] == ELFCLASS32
|| ehdr.s.e_ident[EI_CLASS] == ELFCLASS64)
&& ehdr.s.e_ident[EI_DATA] == ELFDATA2LSB
&& ehdr.s.e_ident[EI_VERSION] == EV_CURRENT))
return NULL;
if (ehdr.s.e_ident[EI_CLASS] == ELFCLASS32)
return loadelf32(&ehdr.s);
else if (ehdr.s.e_ident[EI_CLASS] == ELFCLASS64)
return loadelf64(&ehdr.b);
else
return NULL;
}
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