static int read_trailer(int fd, struct exec_trailer *trail)
{
lseek(fd, (long) -TRAILER_SIZE, SEEK_END);
if (read(fd, (char *) trail, TRAILER_SIZE) < TRAILER_SIZE)
return BAD_BYTECODE;
fixup_endianness_trailer(&trail->num_sections);
if (strncmp(trail->magic, EXEC_MAGIC, 12) == 0)
return 0;
else
return BAD_BYTECODE;
}
void caml_read_section_descriptors(int fd, struct exec_trailer *trail)
{
int toc_size, i;
toc_size = trail->num_sections * 8;
trail->section = caml_stat_alloc(toc_size);
lseek(fd, - (long) (TRAILER_SIZE + toc_size), SEEK_END);
if (read(fd, (char *) trail->section, toc_size) != toc_size)
caml_fatal_error("Fatal error: cannot read section table\n");
/* Fixup endianness of lengths */
for (i = 0; i < trail->num_sections; i++)
fixup_endianness_trailer(&(trail->section[i].len));
}
