int
pmelf_getsym32(Elf_Stream s, Elf32_Sym *psym)
{
if ( 1 != SREAD(psym, sizeof(*psym), 1, s) ) {
return -1;
}
if ( s->needswap ) {
#ifdef PMELF_CONFIG_NO_SWAPSUPPORT
return -2;
#else
elf_swap32( &psym->st_name);
elf_swap32( &psym->st_value);
elf_swap32( &psym->st_size);
elf_swap16( &psym->st_shndx);
#endif
}
#ifdef PARANOIA_ON
{
int x;
if ( (x = ELF32_ST_TYPE( psym->st_info )) > STT_MAXSUP ) {
PMELF_PRINTF( pmelf_err, PMELF_PRE"pmelf_getsym - paranoia: unsupported type %i\n", x);
return -1;
}
if ( (x = ELF32_ST_BIND( psym->st_info )) > STB_MAXSUP ) {
PMELF_PRINTF( pmelf_err, PMELF_PRE"pmelf_getsym - paranoia: unsupported binding %i\n", x);
return -1;
}
}
#endif
return 0;
}
int
pmelf_putehdr32(Elf_Stream s, Elf32_Ehdr *pehdr)
{
uint8_t magic[4] = { ELFMAG0, ELFMAG1, ELFMAG2, ELFMAG3 };
#ifndef PMELF_CONFIG_NO_SWAPSUPPORT
Elf32_Ehdr nehdr;
#endif
if ( memcmp(magic, pehdr->e_ident+EI_MAG0, sizeof(magic)) ) {
PMELF_PRINTF(pmelf_err, PMELF_PRE"error: not an ELF file\n");
return -1;
}
if ( pehdr->e_ident[EI_CLASS] != ELFCLASS32 ) {
PMELF_PRINTF(pmelf_err, PMELF_PRE"error: not an 32-bit ELF file\n");
return -1;
}
if ( pehdr->e_ident[EI_VERSION] != EV_CURRENT ) {
PMELF_PRINTF(pmelf_err, PMELF_PRE"error: not a version %i ELF file\n", EV_CURRENT);
return -1;
}
s->needswap = iamlsb() ^ (pehdr->e_ident[EI_DATA] == ELFDATA2LSB ? 1 : 0);
#ifdef PMELF_CONFIG_NO_SWAPSUPPORT
if ( s->needswap ) {
PMELF_PRINTF(pmelf_err, PMELF_PRE"error: host/target byte order mismatch but pmelf was configured w/o support for byte-swapping\n");
return -2;
}
#else
if ( s->needswap ) {
nehdr = *pehdr;
pehdr = &nehdr;
elf_swap16( &pehdr->e_type );
elf_swap16( &pehdr->e_machine );
elf_swap32( &pehdr->e_version );
elf_swap32( &pehdr->e_entry );
elf_swap32( &pehdr->e_phoff );
elf_swap32( &pehdr->e_shoff );
elf_swap32( &pehdr->e_flags );
elf_swap16( &pehdr->e_ehsize );
elf_swap16( &pehdr->e_phentsize );
elf_swap16( &pehdr->e_phnum );
elf_swap16( &pehdr->e_shentsize );
elf_swap16( &pehdr->e_shnum );
elf_swap16( &pehdr->e_shstrndx );
}
#endif
return s->write && 1 == SWRITE(pehdr, sizeof(*pehdr), 1, s) ? 0 : -1;
}
int
pmelf_putsym64(Elf_Stream s, Elf64_Sym *psym)
{
Elf64_Sym nsym;
if ( s->needswap ) {
#ifdef PMELF_CONFIG_NO_SWAPSUPPORT
return -2;
#else
nsym = *psym;
psym = &nsym;
elf_swap32( &psym->st_name);
elf_swap64( &psym->st_value);
elf_swap64( &psym->st_size);
elf_swap16( &psym->st_shndx);
#endif
}
return s->write && 1 == SWRITE( psym, sizeof(*psym), 1, s) ? 0 : -1;
}
