Changeset View

Standalone View

	Show First 20 Lines • Show All 41 Lines • ▼ Show 20 Lines
	int			int
	__elf_phdr_match_addr(struct dl_phdr_info phdr_info, void addr)			__elf_phdr_match_addr(struct dl_phdr_info phdr_info, void addr)
	{			{
	const Elf_Phdr *ph;			const Elf_Phdr *ph;
	int i;			int i;

	for (i = 0; i < phdr_info->dlpi_phnum; i++) {			for (i = 0; i < phdr_info->dlpi_phnum; i++) {
	ph = &phdr_info->dlpi_phdr[i];			ph = &phdr_info->dlpi_phdr[i];
	if (ph->p_type != PT_LOAD \|\| (ph->p_flags & PF_X) == 0)			if (ph->p_type != PT_LOAD)
	continue;			continue;

				/* ELFv1 ABI for powerpc64 passes function descriptor
				* pointers around, not function pointers. The function
				* descriptors live in .opd, which is a non-executable segment.
				* The PF_X check would therefore make all address checks fail,
				* causing a crash in some instances. Don't skip over
				* non-executable segments in the ELFv1 powerpc64 case.
				*/
				#if !defined(__powerpc64__) \|\| (defined(_CALL_ELF) && _CALL_ELF == 2)
				if ((ph->p_flags & PF_X) == 0)
				continue;
				#endif

	if (phdr_info->dlpi_addr + ph->p_vaddr <= (uintptr_t)addr &&			if (phdr_info->dlpi_addr + ph->p_vaddr <= (uintptr_t)addr &&
	(uintptr_t)addr + sizeof(addr) < phdr_info->dlpi_addr +			(uintptr_t)addr + sizeof(addr) < phdr_info->dlpi_addr +
	ph->p_vaddr + ph->p_memsz)			ph->p_vaddr + ph->p_memsz)
	break;			break;
	}			}
	return (i != phdr_info->dlpi_phnum);			return (i != phdr_info->dlpi_phnum);
	}			}

	Show All 27 Lines