lib: Add mlibc

Signed-off-by: Ian Moffett <ian@osmora.org>

7 files changed, 1176 insertions, 0 deletions

diff --git a/lib/mlibc/sysdeps/keyronex/generic/entry.cpp b/lib/mlibc/sysdeps/keyronex/generic/entry.cpp
new file mode 100644
index 0000000..ff15c62
--- /dev/null
+++ b/lib/mlibc/sysdeps/keyronex/generic/entry.cpp
@@ -0,0 +1,108 @@
+#include <bits/ensure.h>
+#include <bits/posix/posix_signal.h>
+#include <keyronex/syscall.h>
+#include <mlibc/all-sysdeps.hpp>
+#include <mlibc/debug.hpp>
+#include <mlibc/elf/startup.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+// defined by the POSIX library
+void __mlibc_initLocale();
+
+extern "C" uintptr_t *__dlapi_entrystack();
+
+extern char **environ;
+static mlibc::exec_stack_data __mlibc_stack_data;
+
+struct LibraryGuard {
+	LibraryGuard();
+};
+
+static LibraryGuard guard;
+
+LibraryGuard::LibraryGuard()
+{
+	__mlibc_initLocale();
+
+	// Parse the exec() stack.
+	mlibc::parse_exec_stack(__dlapi_entrystack(), &__mlibc_stack_data);
+	mlibc::set_startup_data(__mlibc_stack_data.argc,
+	    __mlibc_stack_data.argv, __mlibc_stack_data.envp);
+}
+
+namespace mlibc {
+int
+sys_sigentry(void *sigentry)
+{
+	uintptr_t ret = syscall1(kPXSysSigEntry, (uintptr_t)sigentry, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	return 0;
+}
+
+[[noreturn]] int
+sys_sigreturn(ucontext_t *context)
+{
+	syscall1(kPXSysSigReturn, (uintptr_t)context, NULL);
+	__builtin_unreachable();
+}
+}
+
+static void
+do_stacktrace(ucontext_t *ctx)
+{
+	size_t *base_ptr = (size_t *)ctx->uc_mcontext.gregs[REG_RBP];
+
+	mlibc::infoLogger() << "Stacktrace:" << frg::endlog;
+	mlibc::infoLogger() << "  [" << (void *)ctx->uc_mcontext.gregs[REG_RIP]
+			    << "]" << frg::endlog;
+	for (;;) {
+		size_t old_bp = base_ptr[0];
+		size_t ret_addr = base_ptr[1];
+		if (!ret_addr)
+			break;
+		mlibc::infoLogger()
+		    << "  [" << (void *)ret_addr << "]" << frg::endlog;
+		if (!old_bp)
+			break;
+		base_ptr = (size_t *)old_bp;
+	}
+}
+
+static void
+__mlibc_sigentry(int which, siginfo_t *siginfo, void *handler,
+    bool is_sigaction, ucontext_t *ret_context)
+{
+	if ((uintptr_t)handler == (uintptr_t)SIG_DFL) {
+		mlibc::infoLogger()
+		    << "mlibc: Unhandled signal " << which << frg::endlog;
+		do_stacktrace(ret_context);
+		mlibc::sys_exit(128 + which);
+	} else if ((uintptr_t)handler == (uintptr_t)SIG_IGN) {
+		/* epsilon */
+	} else {
+		if (is_sigaction)
+			((void (*)(int, siginfo_t *, void *))handler)(which,
+			    siginfo, ret_context);
+		else
+			((void (*)(int))handler)(which);
+	}
+
+	mlibc::sys_sigreturn(ret_context);
+
+	__builtin_unreachable();
+}
+
+extern "C" void
+__mlibc_entry(int (*main_fn)(int argc, char *argv[], char *env[]))
+{
+	/* communicate the signal handler entry point to the kernel */
+	mlibc::sys_sigentry((void *)__mlibc_sigentry);
+
+	// TODO: call __dlapi_enter, otherwise static builds will break (see
+	// Linux sysdeps)
+	auto result = main_fn(__mlibc_stack_data.argc, __mlibc_stack_data.argv,
+	    environ);
+	exit(result);
+}
diff --git a/lib/mlibc/sysdeps/keyronex/generic/generic.cpp b/lib/mlibc/sysdeps/keyronex/generic/generic.cpp
new file mode 100644
index 0000000..a3e77fb
--- /dev/null
+++ b/lib/mlibc/sysdeps/keyronex/generic/generic.cpp
@@ -0,0 +1,753 @@
+#include <asm/ioctls.h>
+
+#include <bits/ensure.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <frg/logging.hpp>
+#include <keyronex/syscall.h>
+#include <limits.h>
+#include <mlibc/all-sysdeps.hpp>
+#include <mlibc/debug.hpp>
+#include <stdlib.h>
+
+#define STUB_ONLY                                           \
+	{                                                   \
+		__ensure(!"STUB_ONLY function was called"); \
+		__builtin_unreachable();                    \
+	}
+
+namespace mlibc {
+
+void
+sys_libc_log(const char *message)
+{
+	syscall1(kPXSysDebug, (uintptr_t)message, NULL);
+}
+
+void
+sys_libc_panic()
+{
+	sys_libc_log("\nMLIBC PANIC\n");
+	for (;;)
+		;
+	STUB_ONLY
+}
+
+void
+sys_exit(int status)
+{
+	syscall1(kPXSysExit, status, NULL);
+	mlibc::panicLogger() << "sys_exit() returned!" << frg::endlog;
+	__builtin_unreachable();
+}
+
+#ifndef MLIBC_BUILDING_RTDL
+int
+sys_tcgetattr(int fd, struct termios *attr)
+{
+	int ret;
+
+	if (int r = sys_ioctl(fd, TCGETS, attr, &ret) != 0) {
+		return r;
+	}
+
+	return 0;
+}
+
+int
+sys_tcsetattr(int fd, int optional_action, const struct termios *attr)
+{
+	int ret;
+
+	switch (optional_action) {
+	case TCSANOW:
+		optional_action = TCSETS;
+		break;
+	case TCSADRAIN:
+		optional_action = TCSETSW;
+		break;
+	case TCSAFLUSH:
+		optional_action = TCSETSF;
+		break;
+	default:
+		__ensure(!"Unsupported tcsetattr");
+	}
+
+	if (int r = sys_ioctl(fd, optional_action, (void *)attr, &ret) != 0) {
+		return r;
+	}
+
+	return 0;
+}
+#endif
+
+int
+sys_tcb_set(void *pointer)
+{
+	return syscall1(kPXSysSetFSBase, (uintptr_t)pointer, NULL);
+}
+
+int
+sys_ppoll(struct pollfd *fds, int nfds, const struct timespec *timeout,
+    const sigset_t *sigmask, int *num_events)
+{
+	uintptr_t ret = syscall4(kPXSysPPoll, (uintptr_t)fds, (uintptr_t)nfds,
+	    (uintptr_t)timeout, (uintptr_t)sigmask, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	*num_events = (ssize_t)ret;
+	return 0;
+}
+
+int
+sys_poll(struct pollfd *fds, nfds_t count, int timeout, int *num_events)
+{
+	struct timespec ts;
+	ts.tv_sec = timeout / 1000;
+	ts.tv_nsec = (timeout % 1000) * 1000000;
+	return sys_ppoll(fds, count, timeout < 0 ? NULL : &ts, NULL,
+	    num_events);
+}
+
+#ifndef MLIBC_BUILDING_RTDL
+int
+sys_pselect(int nfds, fd_set *read_set, fd_set *write_set, fd_set *except_set,
+    const struct timespec *timeout, const sigset_t *sigmask, int *num_events)
+{
+	struct pollfd *fds = (struct pollfd *)malloc(
+	    nfds * sizeof(struct pollfd));
+
+	for (int i = 0; i < nfds; i++) {
+		struct pollfd *fd = &fds[i];
+		memset(fd, 0, sizeof(struct pollfd));
+
+		if (read_set && FD_ISSET(i, read_set))
+			fd->events |= POLLIN; // TODO: Additional events.
+		if (write_set && FD_ISSET(i, write_set))
+			fd->events |= POLLOUT; // TODO: Additional events.
+		if (except_set && FD_ISSET(i, except_set))
+			fd->events |= POLLPRI;
+
+		if (!fd->events) {
+			fd->fd = -1;
+			continue;
+		}
+
+		fd->fd = i;
+	}
+
+	int e = sys_ppoll(fds, nfds, timeout, sigmask, num_events);
+
+	if (e != 0) {
+		free(fds);
+		return e;
+	}
+
+	fd_set res_read_set;
+	fd_set res_write_set;
+	fd_set res_except_set;
+	FD_ZERO(&res_read_set);
+	FD_ZERO(&res_write_set);
+	FD_ZERO(&res_except_set);
+
+	for (int i = 0; i < nfds; i++) {
+		struct pollfd *fd = &fds[i];
+
+		if (read_set && FD_ISSET(i, read_set) &&
+		    fd->revents & (POLLIN | POLLERR | POLLHUP)) {
+			FD_SET(i, &res_read_set);
+		}
+
+		if (write_set && FD_ISSET(i, write_set) &&
+		    fd->revents & (POLLOUT | POLLERR | POLLHUP)) {
+			FD_SET(i, &res_write_set);
+		}
+
+		if (except_set && FD_ISSET(i, except_set) &&
+		    fd->revents & POLLPRI) {
+			FD_SET(i, &res_except_set);
+		}
+	}
+
+	free(fds);
+
+	if (read_set)
+		memcpy(read_set, &res_read_set, sizeof(fd_set));
+	if (write_set)
+		memcpy(write_set, &res_write_set, sizeof(fd_set));
+	if (except_set)
+		memcpy(except_set, &res_except_set, sizeof(fd_set));
+
+	return 0;
+}
+#endif
+
+int
+sys_fcntl(int fd, int request, va_list args, int *result)
+{
+	auto ret = syscall3(kPXSysFCntl, fd, request, va_arg(args, uint64_t),
+	    NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	*result = ret;
+	return 0;
+}
+
+int
+sys_futex_wait(int *pointer, int expected, const struct timespec *time)
+{
+	auto ret = syscall3(kPXSysFutexWait, (uintptr_t)pointer, expected,
+	    (uintptr_t)time, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	return 0;
+}
+
+int
+sys_futex_wake(int *pointer)
+{
+	auto ret = syscall1(kPXSysFutexWake, (uintptr_t)pointer, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	return 0;
+}
+
+#ifndef MLIBC_BUILDING_RTDL
+int
+sys_ioctl(int fd, unsigned long request, void *arg, int *result)
+{
+	uintptr_t r = syscall3(kPXSysIOCtl, fd, request, (uintptr_t)arg, NULL);
+	if (int e = sc_error(r); e)
+		return e;
+	*result = r;
+	return 0;
+}
+#endif
+
+int
+sys_isatty(int fd)
+{
+	uintptr_t ret = syscall1(kPXSysIsATTY, fd, NULL);
+	if (int e = sc_error(ret); e) {
+		return e;
+	}
+	return 0;
+}
+
+#ifndef MLIBC_BUILDING_RTDL
+int
+sys_getcwd(char *buffer, size_t size)
+{
+	uintptr_t ret = syscall2(kPXSysGetCWD, (uintptr_t)buffer, size, NULL);
+	if (int e = sc_error(ret); e) {
+		return e;
+	}
+	return 0;
+}
+#endif
+
+int
+sys_dup(int fd, int flags, int *newfd)
+{
+	uintptr_t ret = syscall2(kPXSysDup, fd, flags, NULL);
+	if (int e = sc_error(ret); e) {
+		return e;
+	}
+	*newfd = ret;
+	return 0;
+}
+
+int
+sys_dup2(int fd, int flags, int newfd)
+{
+	uintptr_t ret = syscall3(kPXSysDup3, fd, newfd, flags, NULL);
+	if (int e = sc_error(ret); e) {
+		return e;
+	}
+	return 0;
+}
+
+int
+sys_openat(int dirfd, const char *path, int flags, mode_t mode, int *fd)
+{
+	uintptr_t r = syscall4(kPXSysOpenAt, dirfd, (uintptr_t)path,
+	    (uintptr_t)flags, (uintptr_t)mode, NULL);
+	if (int e = sc_error(r); e)
+		return e;
+	*fd = (int)r;
+	return 0;
+}
+
+int
+sys_open(const char *path, int flags, mode_t mode, int *fd)
+{
+	return sys_openat(AT_FDCWD, path, flags, mode, fd);
+}
+
+int
+sys_open_dir(const char *path, int *handle)
+{
+	return sys_open(path, O_DIRECTORY, 0, handle);
+}
+
+int
+sys_read_entries(int fd, void *buffer, size_t max_size, size_t *bytes_read)
+{
+	uintptr_t r = syscall3(kPXSysReadDir, fd, (uintptr_t)buffer, max_size,
+	    NULL);
+
+	if (int e = sc_error(r); e)
+		return e;
+
+	*bytes_read = r;
+	return 0;
+}
+
+int
+sys_close(int fd)
+{
+	return (int)syscall1(kPXSysClose, fd, NULL);
+}
+
+int
+sys_link(const char *old_path, const char *new_path)
+{
+	uintptr_t ret = syscall2(kPXSysLink, (uintptr_t)old_path,
+	    (uintptr_t)new_path, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	return 0;
+}
+
+int
+sys_seek(int fd, off_t offset, int whence, off_t *new_offset)
+{
+	uintptr_t ret = syscall3(kPXSysSeek, fd, offset, whence, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	*new_offset = (ssize_t)ret;
+	return 0;
+}
+
+int
+sys_read(int fd, void *buf, size_t count, ssize_t *bytes_read)
+{
+	uintptr_t ret = syscall3(kPXSysRead, fd, (uintptr_t)buf,
+	    (uintptr_t)count, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	*bytes_read = (ssize_t)ret;
+	return 0;
+}
+
+int
+sys_write(int fd, const void *buf, size_t count, ssize_t *bytes_written)
+{
+	uintptr_t ret = syscall3(kPXSysWrite, fd, (uintptr_t)buf,
+	    (uintptr_t)count, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	*bytes_written = (ssize_t)ret;
+	return 0;
+}
+
+int
+sys_readlink(const char *path, void *buffer, size_t max_size, ssize_t *length)
+{
+	uintptr_t ret = syscall3(kPXSysReadLink, (uintptr_t)path,
+	    (uintptr_t)buffer, (uintptr_t)max_size, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	*length = (ssize_t)ret;
+	return 0;
+}
+
+int
+sys_pipe(int *fds, int flags)
+{
+	uintptr_t ret = syscall2(kPXSysPipe, (uintptr_t)fds, flags, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	return 0;
+}
+
+int
+sys_unlinkat(int fd, const char *path, int flags)
+{
+	uintptr_t ret = syscall3(kPXSysUnlinkAt, fd, (uintptr_t)path, flags,
+	    NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	return 0;
+}
+
+int
+sys_vm_map(void *hint, size_t size, int prot, int flags, int fd, off_t offset,
+    void **window)
+{
+	uintptr_t r = syscall6(kPXSysMmap, (uintptr_t)hint, size, prot, flags,
+	    fd, offset, NULL);
+	if (int e = sc_error(r); e)
+		return e;
+	*window = (void *)r;
+	return 0;
+}
+
+int
+sys_vm_unmap(void *pointer, size_t size)
+{
+	uintptr_t r = syscall2(kPXSysMunmap, (uintptr_t)pointer, size, NULL);
+	if (int e = sc_error(r); e)
+		return e;
+	return 0;
+}
+
+int
+sys_vm_protect(void *pointer, size_t size, int prot)
+{
+
+	mlibc::infoLogger() << "mlibc: sys_vm_protect(" << pointer << ", "
+			    << size << ", " << prot << "); stub!\n"
+			    << frg::endlog;
+	return 0;
+}
+
+int
+sys_anon_allocate(size_t size, void **pointer)
+{
+	return sys_vm_map(NULL, size, PROT_EXEC | PROT_READ | PROT_WRITE,
+	    MAP_ANONYMOUS, -1, 0, pointer);
+}
+
+int
+sys_anon_free(void *pointer, size_t size)
+{
+	return sys_vm_unmap(pointer, size);
+}
+
+pid_t
+sys_getpid()
+{
+	return syscall0(kPXSysGetPID, NULL);
+}
+
+pid_t
+sys_getppid()
+{
+	return syscall0(kPXSysGetPPID, NULL);
+}
+
+uid_t
+sys_getuid()
+{
+	return 0;
+}
+
+uid_t
+sys_geteuid()
+{
+	return 0;
+}
+
+gid_t
+sys_getgid()
+{
+	return 0;
+}
+
+int
+sys_getsid(pid_t pid, pid_t *sid)
+{
+	auto ret = syscall1(kPXSysGetSID, pid, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	*sid = (pid_t)(ret);
+	return 0;
+}
+
+int
+sys_setgid(gid_t gid)
+{
+	(void)gid;
+	return 0;
+}
+
+int
+sys_getpgid(pid_t pid, pid_t *out)
+{
+	auto ret = syscall1(kPXSysGetPGID, pid, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	*out = (pid_t)(ret);
+	return 0;
+}
+
+int
+sys_setpgid(pid_t pid, pid_t pgid)
+{
+	auto ret = syscall2(kPXSysSetPGID, pid, pgid, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	return 0;
+}
+
+int
+sys_setsid(pid_t *sid)
+{
+	auto ret = syscall0(kPXSysSetSID, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	*sid = (pid_t)ret;
+	return 0;
+}
+
+gid_t
+sys_getegid()
+{
+	mlibc::infoLogger() << "mlibc: " << __func__ << " is a stub!\n"
+			    << frg::endlog;
+	return 0;
+}
+
+pid_t
+sys_gettid()
+{
+	return syscall0(kPXSysGetTID, NULL);
+}
+
+int
+sys_clock_get(int clock, time_t *secs, long *nanos)
+{
+	auto ret = syscall1(kPXSysClockGet, clock, NULL);
+	*secs = ret / 1000000000;
+	*nanos = ret % 1000000000;
+	return 0;
+}
+
+int
+sys_stat(fsfd_target fsfdt, int fd, const char *path, int flags,
+    struct stat *statbuf)
+{
+	uintptr_t r;
+	enum posix_stat_kind kind;
+
+	switch (fsfdt) {
+	case fsfd_target::fd:
+		kind = kPXStatKindFD;
+		break;
+
+	case fsfd_target::path:
+		kind = kPXStatKindCWD;
+		break;
+	case fsfd_target::fd_path:
+		kind = kPXStatKindAt;
+		break;
+
+	default:
+		__ensure(!"stat: Invalid fsfdt");
+		__builtin_unreachable();
+	}
+
+	r = syscall5(kPXSysStat, kind, fd, (uintptr_t)path, flags,
+	    (uintptr_t)statbuf, NULL);
+	if (int e = sc_error(r); e)
+		return e;
+	return 0;
+}
+
+int
+sys_statfs(const char *path, struct statfs *buf)
+{
+	uintptr_t ret = syscall2(kPXSysStatFS, (uintptr_t)path, (uintptr_t)buf,
+	    NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	return 0;
+}
+
+int
+sys_statvfs(const char *path, struct statvfs *buf)
+{
+	struct statfs sb;
+	uintptr_t ret = syscall2(kPXSysStatFS, (uintptr_t)path, (uintptr_t)&sb,
+	    NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+
+	buf->f_bsize = sb.f_bsize;
+	buf->f_frsize = sb.f_frsize;
+	buf->f_blocks = sb.f_blocks;
+	buf->f_bfree = sb.f_bfree;
+	buf->f_bavail = sb.f_bavail;
+
+	buf->f_files = sb.f_files;
+	buf->f_ffree = sb.f_ffree;
+	buf->f_favail = sb.f_ffree;
+
+	buf->f_fsid = sb.f_fsid.__val[1] | (uint64_t)sb.f_fsid.__val[0] << 32;
+	buf->f_flag = sb.f_flags;
+	buf->f_namemax = sb.f_namelen;
+
+	return 0;
+}
+
+int
+sys_faccessat(int dirfd, const char *pathname, int mode, int flags)
+{
+	(void)flags;
+	struct stat buf;
+	if (int r = sys_stat(dirfd == AT_FDCWD ? fsfd_target::path :
+						 fsfd_target::fd_path,
+		dirfd, pathname, mode & AT_SYMLINK_FOLLOW, &buf)) {
+		return r;
+	}
+	return 0;
+}
+
+int
+sys_access(const char *path, int mode)
+{
+	return sys_faccessat(AT_FDCWD, path, mode, 0);
+}
+
+int
+sys_fork(pid_t *child)
+{
+	uintptr_t ret = syscall0(kPXSysFork, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	*child = (int)ret;
+	return 0;
+}
+
+int
+sys_execve(const char *path, char *const argv[], char *const envp[])
+{
+	uintptr_t ret = syscall3(kPXSysExecVE, (uintptr_t)path, (uintptr_t)argv,
+	    (uintptr_t)envp, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	mlibc::panicLogger() << "execve returned! " << ret << frg::endlog;
+	__builtin_unreachable();
+}
+
+int
+sys_waitpid(pid_t pid, int *status, int flags, struct rusage *ru,
+    pid_t *ret_pid)
+{
+	(void)ru;
+
+	uintptr_t ret = syscall3(kPXSysWaitPID, pid, (uintptr_t)status, flags,
+	    NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	*ret_pid = (pid_t)ret;
+	return 0;
+}
+
+#ifndef MLIBC_BUILDING_RTDL
+int
+sys_sleep(time_t *sec, long *nanosec)
+{
+	auto ret = syscall1(kPXSysSleep, *sec * 1000000000 + *nanosec, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	return 0;
+}
+
+int
+sys_uname(struct utsname *buf)
+{
+	uintptr_t ret = syscall1(kPXSysUTSName, (uintptr_t)buf, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	return 0;
+}
+
+int
+sys_gethostname(char *buf, size_t bufsize)
+{
+	struct utsname uname_buf;
+	if (auto e = sys_uname(&uname_buf); e)
+		return e;
+
+	auto node_len = strlen(uname_buf.nodename);
+	if (node_len >= bufsize)
+		return ENAMETOOLONG;
+
+	memcpy(buf, uname_buf.nodename, node_len);
+	buf[node_len] = '\0';
+	return 0;
+}
+
+int
+sys_fsync(int)
+{
+	mlibc::infoLogger() << "mlibc: fsync is a stub" << frg::endlog;
+	return 0;
+}
+
+int
+sys_getentropy(void *buffer, size_t length)
+{
+	/* todo: improve lmao */
+	mlibc::infoLogger() << "mlibc: getentropy is a stub" << frg::endlog;
+	memset(buffer, 123, length);
+	return 0;
+}
+#endif
+
+int
+sys_mkdir(const char *path, mode_t mode)
+{
+	return sys_mkdirat(AT_FDCWD, path, mode);
+}
+
+int
+sys_mkdirat(int dirfd, const char *path, mode_t mode)
+{
+	uintptr_t ret = syscall3(kPXSysMkDirAt, dirfd, (uintptr_t)path, mode,
+	    NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	return 0;
+}
+
+int
+sys_chdir(const char *path)
+{
+	uintptr_t ret = syscall1(kPXSysChDir, (uintptr_t)path, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	return 0;
+}
+
+int
+sys_umask(mode_t mode, mode_t *old)
+{
+	uintptr_t ret = syscall1(kPXSysUMask, mode, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	*old = (mode_t)ret;
+	return 0;
+}
+
+int
+sys_rename(const char *old_path, const char *new_path)
+{
+	return sys_renameat(AT_FDCWD, old_path, AT_FDCWD, new_path);
+}
+
+int
+sys_renameat(int old_dirfd, const char *old_path, int new_dirfd,
+    const char *new_path)
+{
+	auto ret = syscall4(kPXSysRenameAt, old_dirfd, (uintptr_t)old_path,
+	    new_dirfd, (uintptr_t)new_path, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	return 0;
+}
+
+} // namespace mlibc
diff --git a/lib/mlibc/sysdeps/keyronex/generic/linux.cpp b/lib/mlibc/sysdeps/keyronex/generic/linux.cpp
new file mode 100644
index 0000000..9b4a4c7
--- /dev/null
+++ b/lib/mlibc/sysdeps/keyronex/generic/linux.cpp
@@ -0,0 +1,41 @@
+#include <sys/types.h>
+
+#include <keyronex/syscall.h>
+#include <mlibc/ansi-sysdeps.hpp>
+#include <mlibc/debug.hpp>
+#include <mlibc/posix-sysdeps.hpp>
+#include <mlibc/linux-sysdeps.hpp>
+
+namespace mlibc {
+
+int
+sys_epoll_pwait(int epfd, struct epoll_event *ev, int n, int timeout,
+    const sigset_t *sigmask, int *raised)
+{
+	uintptr_t ret = syscall5(kPXSysEPollWait, epfd, (uintptr_t)ev, n,
+	    timeout, (uintptr_t)sigmask, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	*raised = ret;
+	return 0;
+}
+
+int
+sys_epoll_create(int flags, int *fd)
+{
+	uintptr_t ret = syscall1(kPXSysEPollCreate, flags, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	*fd = ret;
+	return 0;
+}
+
+int
+sys_epoll_ctl(int epfd, int mode, int fd, struct epoll_event *ev)
+{
+	uintptr_t ret = syscall4(kPXSysEPollCtl, epfd, mode, fd, (uintptr_t)ev,
+	    NULL);
+	return sc_error(ret);
+}
+
+}
\ No newline at end of file
diff --git a/lib/mlibc/sysdeps/keyronex/generic/signal.cpp b/lib/mlibc/sysdeps/keyronex/generic/signal.cpp
new file mode 100644
index 0000000..ead3dee
--- /dev/null
+++ b/lib/mlibc/sysdeps/keyronex/generic/signal.cpp
@@ -0,0 +1,66 @@
+#include <sys/types.h>
+
+#include <keyronex/syscall.h>
+#include <mlibc/ansi-sysdeps.hpp>
+#include <mlibc/posix-sysdeps.hpp>
+#include <mlibc/debug.hpp>
+
+namespace mlibc {
+
+int
+sys_sigprocmask(int how, const sigset_t *__restrict set,
+    sigset_t *__restrict retrieve)
+{
+	auto ret = syscall3(kPXSysSigMask, how, (uintptr_t)set,
+	    (uintptr_t)retrieve, NULL);
+	if (int e = sc_error(ret); e) {
+		return e;
+	}
+
+	return 0;
+}
+
+int
+sys_sigaction(int signal, const struct sigaction *__restrict action,
+    struct sigaction *__restrict oldAction)
+{
+	auto ret = syscall3(kPXSysSigAction, signal, (uintptr_t)action,
+	    (uintptr_t)oldAction, NULL);
+	if (int e = sc_error(ret); e) {
+		return e;
+	}
+
+	return 0;
+}
+
+int
+sys_kill(int pid, int signal)
+{
+	if (signal == 0) {
+		mlibc::infoLogger() << "Sending signal 0! Allowing" << frg::endlog;
+		return 0;
+	}
+
+	auto ret = syscall2(kPXSysSigSend, pid, signal, NULL);
+	if (int e = sc_error(ret); e) {
+		return e;
+	}
+
+	return 0;
+}
+
+int
+sys_sigsuspend(const sigset_t *set)
+{
+	auto ret = syscall1(kPXSysSigSuspend, (uintptr_t)set, NULL);
+	if (int e = sc_error(ret); e) {
+		return e;
+	}
+
+	mlibc::panicLogger()
+	    << "Unexpected zero return from sigsuspend()" << frg::endlog;
+
+	return 0;
+}
+
+}
\ No newline at end of file
diff --git a/lib/mlibc/sysdeps/keyronex/generic/socket.cpp b/lib/mlibc/sysdeps/keyronex/generic/socket.cpp
new file mode 100644
index 0000000..c6453bf
--- /dev/null
+++ b/lib/mlibc/sysdeps/keyronex/generic/socket.cpp
@@ -0,0 +1,119 @@
+#include <sys/errno.h>
+
+#include <keyronex/syscall.h>
+#include <mlibc/all-sysdeps.hpp>
+#include <mlibc/allocator.hpp>
+#include <mlibc/debug.hpp>
+
+#define log_unimplemented()                                     \
+	mlibc::infoLogger() << "mlibc: " << __PRETTY_FUNCTION__ \
+			    << " is a stub!" << frg::endlog;
+
+namespace mlibc {
+
+int
+sys_socket(int family, int type, int protocol, int *fd)
+{
+	auto ret = syscall3(kPXSysSocket, family, type, protocol, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	*fd = ret;
+	return 0;
+}
+
+int
+sys_bind(int fd, const struct sockaddr *addr, socklen_t addrlen)
+{
+	auto ret = syscall3(kPXSysBind, fd, (uintptr_t)addr, addrlen, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	return 0;
+}
+
+int
+sys_connect(int fd, const struct sockaddr *addr, socklen_t addrlen)
+{
+	auto ret = syscall3(kPXSysConnect, fd, (uintptr_t)addr, addrlen, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	return 0;
+}
+
+int
+sys_listen(int fd, int backlog)
+{
+	auto ret = syscall2(kPXSysListen, fd, backlog, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	return 0;
+}
+
+int
+sys_accept(int fd, int *newfd, struct sockaddr *addr, socklen_t *addrlen,
+    int flags)
+{
+	auto ret = syscall4(kPXSysAccept, fd, (uintptr_t)addr,
+	    (uintptr_t)addrlen, flags, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	*newfd = ret;
+	return 0;
+}
+
+int
+sys_msg_send(int fd, const struct msghdr *msg, int flags, ssize_t *length)
+{
+	auto ret = syscall3(kPXSysSendMsg, fd, (uintptr_t)msg, flags, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	*length = ret;
+	return 0;
+}
+
+int
+sys_msg_recv(int fd, struct msghdr *msg, int flags, ssize_t *length)
+{
+	auto ret = syscall3(kPXSysRecvMsg, fd, (uintptr_t)msg, flags, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	*length = ret;
+	return 0;
+}
+
+int
+sys_socketpair(int domain, int type_and_flags, int proto, int *fds)
+{
+	auto ret = syscall4(kPXSysSocketPair, domain, type_and_flags, proto,
+	    (uintptr_t)fds, NULL);
+	if (int e = sc_error(ret); e)
+		return e;
+	return 0;
+}
+
+int
+sys_getsockopt(int fd, int layer, int number, void *__restrict buffer,
+    socklen_t *__restrict size)
+{
+	(void)fd;
+	(void)layer;
+	(void)number;
+	(void)buffer;
+	(void)size;
+	log_unimplemented();
+	return ENOSYS;
+}
+
+int
+sys_setsockopt(int fd, int layer, int number, const void *buffer,
+    socklen_t size)
+{
+	(void)fd;
+	(void)layer;
+	(void)number;
+	(void)buffer;
+	(void)size;
+	log_unimplemented();
+	return ENOSYS;
+}
+
+}
diff --git a/lib/mlibc/sysdeps/keyronex/generic/thread.S b/lib/mlibc/sysdeps/keyronex/generic/thread.S
new file mode 100644
index 0000000..47ab6a9
--- /dev/null
+++ b/lib/mlibc/sysdeps/keyronex/generic/thread.S
@@ -0,0 +1,9 @@
+.section .text
+.global __mlibc_thread_entry
+__mlibc_thread_entry:
+	pop %rdi
+	pop %rsi
+	pop %rdx
+	call __mlibc_thread_trampoline
+
+.section .note.GNU-stack,"",%progbits
diff --git a/lib/mlibc/sysdeps/keyronex/generic/thread.cpp b/lib/mlibc/sysdeps/keyronex/generic/thread.cpp
new file mode 100644
index 0000000..cafb74a
--- /dev/null
+++ b/lib/mlibc/sysdeps/keyronex/generic/thread.cpp
@@ -0,0 +1,80 @@
+#include <sys/mman.h>
+#include <mlibc/debug.hpp>
+#include <errno.h>
+#include <mlibc/all-sysdeps.hpp>
+#include <bits/ensure.h>
+#include <mlibc/tcb.hpp>
+#include <keyronex/syscall.h>
+
+extern "C" void __mlibc_thread_trampoline(void *(*fn)(void *), Tcb *tcb, void *arg) {
+	if (mlibc::sys_tcb_set(tcb)) {
+		__ensure(!"failed to set tcb for new thread");
+	}
+
+	while (__atomic_load_n(&tcb->tid, __ATOMIC_RELAXED) == 0) {
+		mlibc::sys_futex_wait(&tcb->tid, 0, nullptr);
+	}
+
+	tcb->invokeThreadFunc(reinterpret_cast<void *>(fn), arg);
+
+	__atomic_store_n(&tcb->didExit, 1, __ATOMIC_RELEASE);
+	mlibc::sys_futex_wake(&tcb->didExit);
+
+	mlibc::sys_thread_exit();
+}
+
+#define DEFAULT_STACK 0x400000
+
+namespace mlibc {
+
+extern "C" void __mlibc_thread_entry();
+
+	int sys_clone(void *tcb, pid_t *tid_out, void *stack) {
+		(void)tcb;
+
+		auto ret = syscall2(kPXSysForkThread, (uintptr_t)__mlibc_thread_entry, (uintptr_t)stack, NULL);
+		if (int e = sc_error(ret); e)
+			return e;
+
+		*tid_out = ret;
+		return 0;
+	}
+
+	int sys_prepare_stack(void **stack, void *entry, void *arg, void *tcb, size_t *stack_size, size_t *guard_size, void **stack_base) {
+		// TODO guard
+
+		mlibc::infoLogger() << "mlibc: sys_prepare_stack() does not setup a guard!" << frg::endlog;
+
+		*guard_size = 0;
+
+		*stack_size = *stack_size ? *stack_size : DEFAULT_STACK;
+
+		if (!*stack) {
+			*stack_base = mmap(NULL, *stack_size, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
+			if (*stack_base == MAP_FAILED) {
+				return errno;
+			}
+		} else {
+			*stack_base = *stack;
+		}
+		
+		*stack = (void *)((char *)*stack_base + *stack_size);
+
+		void **stack_it = (void **)*stack;
+
+		*--stack_it = arg;
+		*--stack_it = tcb;
+		*--stack_it = entry;
+
+		*stack = (void *)stack_it;
+
+		return 0;
+	}
+
+	void sys_thread_exit() {
+		mlibc::panicLogger() << "mlibc: sys_thread_exit unimplemented!" << frg::endlog;
+		__builtin_unreachable();
+	}
+
+
+}