extern "C" void* SystemNative_MMap(void* address,
uint64_t length,
int32_t protection, // bitwise OR of PAL_PROT_*
int32_t flags, // bitwise OR of PAL_MAP_*, but PRIVATE and SHARED are mutually exclusive.
intptr_t fd,
int64_t offset)
{
if (length > SIZE_MAX)
{
errno = ERANGE;
return nullptr;
}
protection = ConvertMMapProtection(protection);
flags = ConvertMMapFlags(flags);
if (flags == -1 || protection == -1)
{
errno = EINVAL;
return nullptr;
}
// Use ToFileDescriptorUnchecked to allow -1 to be passed for the file descriptor, since managed code explicitly uses -1
void* ret = mmap(address, static_cast<size_t>(length), protection, flags, ToFileDescriptorUnchecked(fd), offset);
if (ret == MAP_FAILED)
{
return nullptr;
}
assert(ret != nullptr);
return ret;
}
void* SystemNative_MMap(void* address,
uint64_t length,
int32_t protection, // bitwise OR of PAL_PROT_*
int32_t flags, // bitwise OR of PAL_MAP_*, but PRIVATE and SHARED are mutually exclusive.
intptr_t fd,
int64_t offset)
{
if (length > SIZE_MAX)
{
errno = ERANGE;
return NULL;
}
protection = ConvertMMapProtection(protection);
flags = ConvertMMapFlags(flags);
if (flags == -1 || protection == -1)
{
errno = EINVAL;
return NULL;
}
// Use ToFileDescriptorUnchecked to allow -1 to be passed for the file descriptor, since managed code explicitly uses -1
void* ret =
#if HAVE_MMAP64
mmap64(
#else
mmap(
#endif
address,
(size_t)length,
protection,
flags,
ToFileDescriptorUnchecked(fd),
(off_t)offset);
if (ret == MAP_FAILED)
{
return NULL;
}
assert(ret != NULL);
return ret;
}
