diff --git mlibc-clean/abis/linux/fcntl.h mlibc-workdir/abis/linux/fcntl.h
index b2215a2..fb152a7 100644
--- mlibc-clean/abis/linux/fcntl.h
+++ mlibc-workdir/abis/linux/fcntl.h
@@ -88,6 +88,14 @@
 
 #if __MLIBC_LINUX_OPTION
 
+#define DN_ACCESS 1
+#define DN_MODIFY 2
+#define DN_CREATE 4
+#define DN_DELETE 8
+#define DN_RENAME 16
+#define DN_ATTRIB 32
+#define DN_MULTISHOT 0x80000000
+
 #define AT_STATX_SYNC_AS_STAT 0x0000
 #define AT_STATX_FORCE_SYNC 0x2000
 #define AT_STATX_DONT_SYNC 0x4000
diff --git mlibc-clean/meson.build mlibc-workdir/meson.build
index 37f8200..af2ea0b 100644
--- mlibc-clean/meson.build
+++ mlibc-workdir/meson.build
@@ -264,6 +264,7 @@ elif host_machine.system() == 'astral'
 	libc_include_dirs += include_directories('sysdeps/astral/include')
 	internal_conf.set10('MLIBC_MAP_DSO_SEGMENTS', true)
 	internal_conf.set10('MLIBC_MAP_FILE_WINDOWS', true)
+	internal_conf.set10('MLIBC_MMAP_ALLOCATE_DSO', true)
 	subdir('sysdeps/astral')
 elif host_machine.system() == 'menix'
 	rtld_include_dirs += include_directories('sysdeps/menix/include')
diff --git mlibc-clean/options/posix/generic/unistd.cpp mlibc-workdir/options/posix/generic/unistd.cpp
index 9652a17..c38ab8c 100644
--- mlibc-clean/options/posix/generic/unistd.cpp
+++ mlibc-workdir/options/posix/generic/unistd.cpp
@@ -571,9 +571,16 @@ int lockf(int fd, int op, off_t size) {
 	return -1;
 }
 
-int nice(int) {
-	__ensure(!"Not implemented");
-	__builtin_unreachable();
+int nice(int nice) {
+	int new_nice;
+
+	MLIBC_CHECK_OR_ENOSYS(mlibc::sys_nice, -1);
+	if(int e = mlibc::sys_nice(nice, &new_nice); e) {
+		errno = e;
+		return -1;
+	}
+
+	return new_nice;
 }
 
 long pathconf(const char *, int name) {
diff --git mlibc-clean/options/posix/include/mlibc/posix-sysdeps.hpp mlibc-workdir/options/posix/include/mlibc/posix-sysdeps.hpp
index 9387f76..0f2852b 100644
--- mlibc-clean/options/posix/include/mlibc/posix-sysdeps.hpp
+++ mlibc-workdir/options/posix/include/mlibc/posix-sysdeps.hpp
@@ -253,6 +253,8 @@ int sys_vm_unmap(void *pointer, size_t size);
 
 [[gnu::weak]] int sys_inet_configured(bool *ipv4, bool *ipv6);
 
+[[gnu::weak]] int sys_nice(int nice, int *ret);
+
 } //namespace mlibc
 
 #endif // MLIBC_POSIX_SYSDEPS
diff --git mlibc-clean/sysdeps/astral/crt-x86_64/crt0.S mlibc-workdir/sysdeps/astral/crt-x86_64/crt1.S
similarity index 100%
rename from mlibc-clean/sysdeps/astral/crt-x86_64/crt0.S
rename to mlibc-workdir/sysdeps/astral/crt-x86_64/crt1.S
diff --git mlibc-clean/sysdeps/astral/generic/astral.cpp mlibc-workdir/sysdeps/astral/generic/astral.cpp
index d5ba7b2..a86353f 100644
--- mlibc-clean/sysdeps/astral/generic/astral.cpp
+++ mlibc-workdir/sysdeps/astral/generic/astral.cpp
@@ -4,7 +4,7 @@
 
 #ifndef MLIBC_BUILDING_RTLD
 
-int syscall_archctl(int func, void *arg) {
+int arch_ctl(int func, void *arg) {
 	long ret;
 	long error = syscall(SYSCALL_ARCHCTL, &ret, func, (uint64_t)arg);
 	if(error)
diff --git mlibc-clean/sysdeps/astral/generic/generic.cpp mlibc-workdir/sysdeps/astral/generic/generic.cpp
index bb85dba..5e9e21a 100644
--- mlibc-clean/sysdeps/astral/generic/generic.cpp
+++ mlibc-workdir/sysdeps/astral/generic/generic.cpp
@@ -31,6 +31,12 @@ namespace mlibc {
 		return 0;
 	}
 
+	int sys_getcpu(int *cpu) {
+		*cpu = 0;
+		// TODO unstub
+		return 0;
+	}
+
 	int sys_getsockopt(int fd, int layer, int number,
 		void *__restrict buffer, socklen_t *__restrict size) {
 		(void)size;
@@ -40,6 +46,23 @@ namespace mlibc {
 		return 0;
 	}
 
+	int sys_flock(int fd, int options) {
+		long r;
+		return syscall(SYSCALL_FLOCK, &r, fd, options);
+	}
+
+	int sys_nice(int nice, int *ret) {
+		long r = -1;
+		long e = syscall(SYSCALL_NICE, &r, nice);
+		*ret = r;
+		return e;
+	}
+
+	int sys_shutdown(int sockfd, int how) {
+		long ret;
+		return syscall(SYSCALL_SHUTDOWN, &ret, sockfd, how);
+	}
+
 	int sys_tgkill(int pid, int tid, int sig) {
 		long ret;
 		return syscall(SYSCALL_KILLTHREAD, &ret, pid, tid, sig);
@@ -161,7 +184,18 @@ namespace mlibc {
 		*bytes_written = writec;
 		return error;
 	}
-	
+
+	int sys_getrlimit(int resource, struct rlimit *limit) {
+		switch(resource) {
+		case RLIMIT_NOFILE:
+			limit->rlim_cur = RLIM_INFINITY;
+			limit->rlim_max = RLIM_INFINITY;
+			return 0;
+		default:
+			return EINVAL;
+		}
+	}
+
 	#ifndef MLIBC_BUILDING_RTLD
 
 	typedef struct {
@@ -376,6 +410,12 @@ namespace mlibc {
 		return ret;
 	}
 
+	pid_t sys_gettid() {
+		long ret;
+		syscall(SYSCALL_GETTID, &ret);
+		return ret;
+	}
+
 	#ifndef MLIBC_BUILDING_RTLD
 
 	[[noreturn]] void sys_thread_exit() {
@@ -771,7 +811,7 @@ namespace mlibc {
 
 	int sys_tcb_set(void *pointer) {
 		long r;
-		return syscall(SYSCALL_ARCHCTL, &r, ARCH_CTL_FSBASE, (uint64_t)pointer);
+		return syscall(SYSCALL_ARCHCTL, &r, ARCH_CTL_SET_FSBASE, (uint64_t)pointer);
 	}
 
 	#define FUTEX_WAIT 0
diff --git mlibc-clean/sysdeps/astral/include/astral/archctl.h mlibc-workdir/sysdeps/astral/include/astral/archctl.h
index d738e02..7e4f2a1 100644
--- mlibc-clean/sysdeps/astral/include/astral/archctl.h
+++ mlibc-workdir/sysdeps/astral/include/astral/archctl.h
@@ -1,8 +1,10 @@
 #ifndef _ASTRAL_ARCHCTL_H
 #define _ASTRAL_ARCHCTL_H
 
-#define ARCH_CTL_GSBASE 0
-#define ARCH_CTL_FSBASE 1
+#define ARCH_CTL_SET_GSBASE 0
+#define ARCH_CTL_SET_FSBASE 1
+#define ARCH_CTL_GET_GSBASE 2
+#define ARCH_CTL_GET_FSBASE 3
 
 #ifdef __cplusplus
 extern "C" {
diff --git mlibc-clean/sysdeps/astral/include/astral/syscall.h mlibc-workdir/sysdeps/astral/include/astral/syscall.h
index 5f42d62..6fbb253 100644
--- mlibc-clean/sysdeps/astral/include/astral/syscall.h
+++ mlibc-workdir/sysdeps/astral/include/astral/syscall.h
@@ -96,6 +96,9 @@
 #define SYSCALL_SIGTIMEDWAIT 89
 #define SYSCALL_SIGPENDING 90
 #define SYSCALL_KILLTHREAD 91
+#define SYSCALL_SHUTDOWN 92
+#define SYSCALL_NICE 93
+#define SYSCALL_FLOCK 94
 
 #ifndef __MLIBC_ABI_ONLY
 
diff --git mlibc-clean/sysdeps/astral/meson.build mlibc-workdir/sysdeps/astral/meson.build
index 0990599..9467cdb 100644
--- mlibc-clean/sysdeps/astral/meson.build
+++ mlibc-workdir/sysdeps/astral/meson.build
@@ -76,14 +76,29 @@ if not no_headers
 		subdir: 'abi-bits',
 		follow_symlinks: true,
 	)
+        install_headers(
+                'include/astral/syscall.h',
+                'include/astral/archctl.h',
+                subdir: 'astral',
+                follow_symlinks: true,
+        )
 endif
 
 if not headers_only
-	crt = custom_target('crt0',
+	custom_target('crt1',
 		build_by_default: true,
 		command: c_compiler.cmd_array() + ['-c', '-o', '@OUTPUT@', '@INPUT@'],
-		input: 'crt-x86_64/crt0.S',
-		output: 'crt0.o',
+		input: 'crt-x86_64/crt1.S',
+		output: 'crt1.o',
+		install: true,
+		install_dir: get_option('libdir')
+	)
+	
+        custom_target('Scrt1',
+		build_by_default: true,
+		command: c_compiler.cmd_array() + ['-c', '-o', '@OUTPUT@', '@INPUT@'],
+		input: 'crt-x86_64/crt1.S',
+		output: 'Scrt1.o',
 		install: true,
 		install_dir: get_option('libdir')
 	)