diff --git mlibc-clean/options/glibc/generic/stdio_ext.cpp mlibc-workdir/options/glibc/generic/stdio_ext.cpp
index ccb3725..3dfa27a 100644
--- mlibc-clean/options/glibc/generic/stdio_ext.cpp
+++ mlibc-workdir/options/glibc/generic/stdio_ext.cpp
@@ -71,14 +71,38 @@ size_t __freadahead(FILE *file_base) {
 	return file_base->__valid_limit - file_base->__offset;
 }
 
-const char *__freadptr(FILE *, size_t *) {
-	__ensure(!"Not implemented");
-	__builtin_unreachable();
+const char *__freadptr(FILE *file_base, size_t *size) {
+	if(file_base->__io_mode != 0) {
+		mlibc::infoLogger() << "mlibc: __freadptr() called but file is not open for reading" << frg::endlog;
+		*size = 0;
+		return nullptr;
+	}
+
+	if(file_base->__unget_ptr != file_base->__buffer_ptr) {
+		*size = file_base->__buffer_ptr - file_base->__unget_ptr;
+		return file_base->__unget_ptr;
+	}
+
+	if(file_base->__offset == file_base->__valid_limit) {
+		*size = 0;
+		return nullptr;
+	}
+
+	*size = file_base->__valid_limit - file_base->__offset;
+	return file_base->__buffer_ptr + file_base->__offset;
 }
 
-void __freadptrinc(FILE *, size_t) {
-	__ensure(!"Not implemented");
-	__builtin_unreachable();
+void __freadptrinc(FILE *file_base, size_t increment) {
+	size_t unget_size = file_base->__buffer_ptr ? file_base->__buffer_ptr - file_base->__unget_ptr : 0;
+	if(increment <= unget_size) {
+		file_base->__unget_ptr += increment;
+		return;
+	}
+
+	increment -= unget_size;
+	file_base->__unget_ptr = file_base->__buffer_ptr;
+	__ensure(file_base->__offset + increment <= file_base->__valid_limit);
+	file_base->__offset += increment;
 }
 
 void __fseterr(FILE *file_base) {
@@ -87,4 +111,3 @@ void __fseterr(FILE *file_base) {
 	// set the error indicator for the stream
 	file->__status_bits |= __MLIBC_ERROR_BIT;
 }
-
diff --git mlibc-clean/options/internal/include/mlibc/allocator.hpp mlibc-workdir/options/internal/include/mlibc/allocator.hpp
index d5496df..4dac6db 100644
--- mlibc-clean/options/internal/include/mlibc/allocator.hpp
+++ mlibc-workdir/options/internal/include/mlibc/allocator.hpp
@@ -11,6 +11,8 @@
 
 struct VirtualAllocator {
 public:
+	static constexpr size_t num_buckets = 14;
+
 	uintptr_t map(size_t length);
 
 	void unmap(uintptr_t address, size_t length);
diff --git mlibc-clean/options/linux/generic/malloc.cpp mlibc-workdir/options/linux/generic/malloc.cpp
index 065de6c..10c7395 100644
--- mlibc-clean/options/linux/generic/malloc.cpp
+++ mlibc-workdir/options/linux/generic/malloc.cpp
@@ -1,7 +1,13 @@
-#include <bits/ensure.h>
+#include <errno.h>
 #include <malloc.h>
+#include <stdlib.h>
 
-void *memalign(size_t, size_t) {
-	__ensure(!"Not implemented");
-	__builtin_unreachable();
+void *memalign(size_t alignment, size_t size) {
+	void *ptr;
+	int ret = posix_memalign(&ptr, alignment, size);
+	if(ret) {
+		errno = ret;
+		return nullptr;
+	}
+	return ptr;
 }
diff --git mlibc-clean/options/posix/generic/monetary.cpp mlibc-workdir/options/posix/generic/monetary.cpp
index 55a567a..d1d7787 100644
--- mlibc-clean/options/posix/generic/monetary.cpp
+++ mlibc-workdir/options/posix/generic/monetary.cpp
@@ -389,6 +389,8 @@ ssize_t strfmon_internal(char *__restrict s, size_t maxsize, mlibc::localeinfo *
 			false,
 			false,
 			false,
+			false,
+			false,
 			opts
 		);
 
diff --git mlibc-clean/options/posix/include/bits/posix/posix_stdio.h mlibc-workdir/options/posix/include/bits/posix/posix_stdio.h
index f0d6edd..ab57b6b 100644
--- mlibc-clean/options/posix/include/bits/posix/posix_stdio.h
+++ mlibc-workdir/options/posix/include/bits/posix/posix_stdio.h
@@ -63,6 +63,7 @@ char *fgetln(FILE *__stream, size_t *__size);
 #endif /* !__MLIBC_ABI_ONLY */
 
 #if defined(_GNU_SOURCE)
+#define RENAME_NOREPLACE (1 << 0)
 #define RENAME_EXCHANGE (1 << 1)
 
 /* GNU extensions */
@@ -97,4 +98,3 @@ FILE *fopencookie(void *__restrict __cookie, const char *__restrict __mode, cook
 
 #endif /* _MLIBC_POSIX_STDIO_H */
 
-
diff --git mlibc-workdir/tests/glibc/memalign.c mlibc-workdir/tests/glibc/memalign.c
new file mode 100644
index 0000000..0b3a158
--- /dev/null
+++ mlibc-workdir/tests/glibc/memalign.c
@@ -0,0 +1,22 @@
+#include <assert.h>
+#include <errno.h>
+#include <malloc.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+int main(void) {
+	void *p;
+
+	errno = 0;
+	p = memalign(256, 1);
+	assert(p != NULL);
+	assert((uintptr_t)p % 256 == 0);
+	free(p);
+
+	errno = 0;
+	p = memalign(3, 1);
+	assert(p == NULL);
+	assert(errno == EINVAL);
+
+	return 0;
+}
diff --git mlibc-clean/tests/meson.build mlibc-workdir/tests/meson.build
index 85b967c..f555a1e 100644
--- mlibc-clean/tests/meson.build
+++ mlibc-workdir/tests/meson.build
@@ -190,6 +190,7 @@ all_test_cases = [
 	'glibc/rpmatch',
 	'glibc/strverscmp',
 	'glibc/memmem',
+	'glibc/memalign',
 	'glibc/stdio_ext',
 	'glibc/_dl_find_object',
 	'glibc/shadow',