diff --git a/abis/linux/in.h b/abis/linux/in.h
index 610afc0702..2ef45859c9 100644
--- a/abis/linux/in.h
+++ b/abis/linux/in.h
@@ -178,6 +178,9 @@ struct group_source_req {
 #define IPV6_RECVHOPLIMIT 51
 #define IPV6_HOPLIMIT 52
 
+#define IPV6_RECVTCLASS	66
+#define IPV6_TCLASS 67
+
 #define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
 #define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP
 
@@ -188,6 +191,8 @@ struct group_source_req {
 #define IP_PMTUDISC_INTERFACE 4
 #define IP_PMTUDISC_OMIT 5
 
+#define MCAST_BLOCK_SOURCE 43
+#define MCAST_UNBLOCK_SOURCE 44
 #define MCAST_JOIN_SOURCE_GROUP 46
 #define MCAST_LEAVE_SOURCE_GROUP 47
 
diff --git a/abis/linux/ioctls.h b/abis/linux/ioctls.h
index c39abb5065..3a957bfc97 100644
--- a/abis/linux/ioctls.h
+++ b/abis/linux/ioctls.h
@@ -9,5 +9,7 @@
 #define SIOCGIFINDEX 0x8933
 #define SIOCATMARK 0x8905
 #define SIOCGIFHWADDR 0x8927
+#define SIOCGIFBRDADDR 0x8919
+#define SIOCGIFNETMASK 0x891B
 
 #endif /* _ABIBITS_IOCTLS_H */
diff --git a/abis/linux/shm.h b/abis/linux/shm.h
index 93fb01bbc7..bf71c8c6e5 100644
--- a/abis/linux/shm.h
+++ b/abis/linux/shm.h
@@ -5,6 +5,8 @@
 extern "C" {
 #endif
 
+#include <unistd.h>
+
 struct shm_info {
 	int used_ids;
 	unsigned long shm_tot;
@@ -14,6 +16,8 @@ struct shm_info {
 	unsigned long swap_successes;
 };
 
+#define SHMLBA (getpagesize())
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/abis/linux/signal.h b/abis/linux/signal.h
index 3a85e4647c..d83b4011fc 100644
--- a/abis/linux/signal.h
+++ b/abis/linux/signal.h
@@ -7,6 +7,13 @@
 #include <abi-bits/uid_t.h>
 #include <bits/size_t.h>
 
+#define POLL_IN 1
+#define POLL_OUT 2
+#define POLL_MSG 3
+#define POLL_ERR 4
+#define POLL_PRI 5
+#define POLL_HUP 6
+
 union sigval {
 	int sival_int;
 	void *sival_ptr;
diff --git a/options/ansi/include/setjmp.h b/options/ansi/include/setjmp.h
index 81cc1ce79d..30346f08bb 100644
--- a/options/ansi/include/setjmp.h
+++ b/options/ansi/include/setjmp.h
@@ -25,7 +25,7 @@ __attribute__((__noreturn__)) void longjmp(jmp_buf buffer, int value);
 
 // POSIX Non-local jumps signal extensions
 
-typedef struct {
+typedef struct __sigjmp_buf {
 	struct __mlibc_jmpbuf_register_state reg_state;
 	int savesigs;
 	sigset_t sigset;
diff --git a/options/elf/include/elf.h b/options/elf/include/elf.h
index 00a84524cc..68d70c2e0c 100644
--- a/options/elf/include/elf.h
+++ b/options/elf/include/elf.h
@@ -23,6 +23,8 @@ extern "C" {
 #define SHF_INFO_LINK 64
 #define SHF_TLS 1024
 
+#define NT_AUXV 6
+
 typedef uint64_t Elf64_Addr;
 typedef uint64_t Elf64_Off;
 typedef uint16_t Elf64_Half;
diff --git a/options/glibc/include/sys/procfs.h b/options/glibc/include/sys/procfs.h
index c4b71eb625..b13a81d6c5 100644
--- a/options/glibc/include/sys/procfs.h
+++ b/options/glibc/include/sys/procfs.h
@@ -15,6 +15,8 @@ typedef unsigned long long elf_greg_t;
 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
 
 typedef struct user_fpregs_struct elf_fpregset_t;
+typedef struct user_regs_struct prgregset_t;
+typedef struct user_fpregs_struct prfpregset_t;
 
 #define ELF_PRARGSZ 80
 
@@ -41,6 +43,10 @@ struct elf_prstatus {
 	int pr_fpvalid;
 };
 
+typedef pid_t lwpid_t;
+typedef void *psaddr_t;
+typedef struct elf_prstatus prstatus_t;
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/options/posix/generic/pthread-stubs.cpp b/options/posix/generic/pthread-stubs.cpp
index b7f5fc666f..9720bc2059 100644
--- a/options/posix/generic/pthread-stubs.cpp
+++ b/options/posix/generic/pthread-stubs.cpp
@@ -1420,6 +1420,7 @@ int pthread_rwlock_unlock(pthread_rwlock_t *rw) {
 }
 
 int pthread_getcpuclockid(pthread_t, clockid_t *) {
-	__ensure(!"Not implemented");
-	__builtin_unreachable();
+	mlibc::infoLogger() << "mlibc: pthread_getcpuclockid() always returns ENOENT"
+			<< frg::endlog;
+	return ENOENT;
 }
diff --git a/options/posix/generic/semaphore-stubs.cpp b/options/posix/generic/semaphore-stubs.cpp
index 1faa55f588..d41eccb72b 100644
--- a/options/posix/generic/semaphore-stubs.cpp
+++ b/options/posix/generic/semaphore-stubs.cpp
@@ -98,7 +98,17 @@ int sem_unlink(const char *) {
 	__builtin_unreachable();
 }
 
-int sem_trywait(sem_t *) {
-	__ensure(!"Not implemented");
-	__builtin_unreachable();
+int sem_trywait(sem_t *sem) {
+	while (true) {
+		auto state = __atomic_load_n(&sem->__mlibc_count, __ATOMIC_ACQUIRE);
+
+		if (state & semaphoreHasWaiters) {
+			return EAGAIN;
+		}
+
+		auto desired = state - 1;
+		if (__atomic_compare_exchange_n(&sem->__mlibc_count, &state, desired, false, __ATOMIC_RELEASE, __ATOMIC_RELAXED)) {
+			return 0;
+		}
+	}
 }
diff --git a/options/posix/include/net/if.h b/options/posix/include/net/if.h
index 6e45f97c81..10016fd07b 100644
--- a/options/posix/include/net/if.h
+++ b/options/posix/include/net/if.h
@@ -85,6 +85,8 @@ unsigned int if_nametoindex(const char *);
 
 #endif /* !__MLIBC_ABI_ONLY */
 
+#define IFHWADDRLEN 6
+
 #define IFF_UP 0x1
 #define IFF_BROADCAST 0x2
 #define IFF_DEBUG 0x4
diff --git a/options/posix/include/netinet/icmp6.h b/options/posix/include/netinet/icmp6.h
index 63733122dc..93f539f0d3 100644
--- a/options/posix/include/netinet/icmp6.h
+++ b/options/posix/include/netinet/icmp6.h
@@ -14,6 +14,7 @@ extern "C" {
 #define ICMP6_FILTER_PASS 2
 #define ICMP6_FILTER_BLOCKOTHERS 3
 #define ICMP6_FILTER_PASSONLY 4
+#define ICMP6_ECHO_REQUEST 128
 
 struct icmp6_filter {
 	uint32_t icmp6_filt[8];
@@ -34,6 +35,12 @@ struct icmp6_hdr {
 #define icmp6_data16 icmp6_dataun.icmp6_un_data16
 #define icmp6_data8 icmp6_dataun.icmp6_un_data8
 
+#define icmp6_pptr icmp6_data32[0]
+#define icmp6_mtu icmp6_data32[0]
+#define icmp6_id icmp6_data16[0]
+#define icmp6_seq icmp6_data16[1]
+#define icmp6_maxdelay icmp6_data16[0]
+
 #define ICMP6_FILTER_WILLPASS(type, filterp) \
 	((((filterp)->icmp6_filt[(type) >> 5]) & (1U << ((type) & 31))) == 0)
 
diff --git a/options/posix/include/netinet/ip_icmp.h b/options/posix/include/netinet/ip_icmp.h
new file mode 100644
index 0000000000..56615e4cfb
--- /dev/null
+++ b/options/posix/include/netinet/ip_icmp.h
@@ -0,0 +1,84 @@
+#ifndef _NETINET_ICMP_H
+#define _NETINET_ICMP_H
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <netinet/in.h>
+#include <netinet/ip.h>
+
+#define ICMP_ECHOREPLY 0
+#define ICMP_ECHO 8
+#define ICMP_ADVLENMIN (8 + sizeof(struct ip) + 8)
+
+struct icmp_ra_addr {
+	uint32_t ira_addr;
+	uint32_t ira_preference;
+};
+
+struct icmp {
+	uint8_t icmp_type;
+	uint8_t icmp_code;
+	uint16_t icmp_cksum;
+	union {
+		unsigned char ih_pptr;
+		struct in_addr ih_gwaddr;
+		struct ih_idseq {
+			uint16_t icd_id;
+			uint16_t icd_seq;
+		} ih_idseq;
+		uint32_t ih_void;
+		
+		struct ih_pmtu {
+			uint16_t ipm_void;
+			uint16_t ipm_nextmtu;
+		} ih_pmtu;
+		
+		struct ih_rtradv {
+			uint8_t irt_num_addrs;
+			uint8_t irt_wpa;
+			uint16_t irt_lifetime;
+		} ih_rtradv;
+	} icmp_hun;
+	union {
+		struct {
+			uint32_t its_otime;
+			uint32_t its_rtime;
+			uint32_t its_ttime;
+		} id_ts;
+		struct {
+			struct ip idi_ip;
+		} id_ip;
+		struct icmp_ra_addr id_radv;
+		uint32_t id_mask;
+		uint8_t id_data[1];
+	} icmp_dun;
+};
+
+#define	icmp_pptr icmp_hun.ih_pptr
+#define	icmp_gwaddr	icmp_hun.ih_gwaddr
+#define	icmp_id	icmp_hun.ih_idseq.icd_id
+#define	icmp_seq icmp_hun.ih_idseq.icd_seq
+#define	icmp_void icmp_hun.ih_void
+#define	icmp_pmvoid	icmp_hun.ih_pmtu.ipm_void
+#define	icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu
+#define	icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs
+#define	icmp_wpa icmp_hun.ih_rtradv.irt_wpa
+#define	icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime
+
+#define	icmp_otime icmp_dun.id_ts.its_otime
+#define	icmp_rtime icmp_dun.id_ts.its_rtime
+#define	icmp_ttime icmp_dun.id_ts.its_ttime
+#define	icmp_ip	icmp_dun.id_ip.idi_ip
+#define	icmp_radv icmp_dun.id_radv
+#define	icmp_mask icmp_dun.id_mask
+#define	icmp_data icmp_dun.id_data
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // _NETINET_ICMP_H
diff --git a/options/posix/include/netinet/tcp.h b/options/posix/include/netinet/tcp.h
index 91ce1326bf..9d64d7af97 100644
--- a/options/posix/include/netinet/tcp.h
+++ b/options/posix/include/netinet/tcp.h
@@ -26,6 +26,7 @@ extern "C" {
 #define TCP_LAST_ACK 9
 #define TCP_LISTEN 10
 #define TCP_CLOSING 11
+#define TCP_QUICKACK 12
 
 #define SOL_TCP 6
 
diff --git a/options/posix/include/unistd.h b/options/posix/include/unistd.h
index 4cc750763a..d29257d365 100644
--- a/options/posix/include/unistd.h
+++ b/options/posix/include/unistd.h
@@ -191,6 +191,7 @@ extern "C" {
 #define _SC_MQ_PRIO_MAX 78
 #define _SC_RTSIG_MAX 79
 #define _SC_SIGQUEUE_MAX 80
+#define _SC_IOV_MAX 81
 
 #define STDERR_FILENO 2
 #define STDIN_FILENO 0
diff --git a/options/posix/meson.build b/options/posix/meson.build
index ad68600117..038dd2c99e 100644
--- a/options/posix/meson.build
+++ b/options/posix/meson.build
@@ -121,6 +121,7 @@ if not no_headers
 		'include/netinet/if_ether.h',
 		'include/netinet/udp.h',
 		'include/netinet/ip6.h',
+		'include/netinet/ip_icmp.h',
 		subdir: 'netinet'
 	)
 	install_headers(
diff --git a/sysdeps/managarm/generic/socket.cpp b/sysdeps/managarm/generic/socket.cpp
index 86a9373b4b..5bdc1fc513 100644
--- a/sysdeps/managarm/generic/socket.cpp
+++ b/sysdeps/managarm/generic/socket.cpp
@@ -297,6 +297,10 @@ int sys_getsockopt(int fd, int layer, int number,
 		mlibc::infoLogger() << "\e[31mmlibc: getsockopt() call with SOL_SOCKET and SO_KEEPALIVE is unimplemented, hardcoding 0\e[39m" << frg::endlog;
 		*(int *)buffer = 0;
 		return 0;
+	}else if(layer == SOL_SOCKET && number == SO_LINGER) {
+		mlibc::infoLogger() << "\e[31mmlibc: getsockopt() call with SOL_SOCKET and SO_LINGER is unimplemented, hardcoding 0\e[39m" << frg::endlog;
+		*(int *)buffer = 0;
+		return 0;
 	}else{
 		mlibc::panicLogger() << "\e[31mmlibc: Unexpected getsockopt() call, layer: " << layer << " number: " << number << "\e[39m" << frg::endlog;
 		__builtin_unreachable();
@@ -352,6 +356,9 @@ int sys_setsockopt(int fd, int layer, int number,
 	}else if(layer == SOL_SOCKET && number == SO_REUSEADDR) {
 		mlibc::infoLogger() << "\e[31mmlibc: setsockopt() call with SOL_SOCKET and SO_REUSEADDR is unimplemented\e[39m" << frg::endlog;
 		return 0;
+	}else if(layer == SOL_SOCKET && number == SO_REUSEPORT) {
+		mlibc::infoLogger() << "\e[31mmlibc: setsockopt() call with SOL_SOCKET and SO_REUSEPORT is unimplemented\e[39m" << frg::endlog;
+		return 0;
 	}else if(layer == SOL_SOCKET && number == SO_RCVBUF) {
 		mlibc::infoLogger() << "\e[31mmlibc: setsockopt() call with SOL_SOCKET and SO_RCVBUF is unimplemented\e[39m" << frg::endlog;
 		return 0;