Add socket and IPv4 support for x86_64

arch/x86_64.c

@@ -88,4 +88,108 @@ int fsync(unsigned int fd) {
   return rtn;
 }
 
+#define SYS_SOCKET 41
+int socket(int domain, int type, int protocol) {
+  int32_t fd;
+  asm volatile (
+    "syscall\n"
+    : "=a"(fd)
+    : "a"(SYS_SOCKET), "D"(domain), "S"(type), "d"(protocol)
+    : "rcx", "r11"
+  );
+  return fd;
+}
+
+#define SYS_SETSOCKOPT 54
+int setsockopt(int fd, int level, int optname, const void* optval, uint64_t optlen) {
+  int rtn;
+  asm volatile(
+    "mov %5, %%r10\n"
+    "mov %6, %%r8\n"
+    "syscall\n"
+    : "=a"(rtn)
+    : "a"(SYS_SETSOCKOPT), "D"(fd), "S"(level), "d"(optname), "r"(optval), "r"(optlen)
+    : "rcx", "r11"
+  );
+  return rtn;
+}
+
+#define SYS_BIND 49
+int bind(int fd, const void* sockaddr, uint64_t addrlen) {
+  int rtn;
+  asm volatile(
+    "syscall\n"
+    : "=a"(rtn)
+    : "a"(SYS_BIND), "D"(fd), "S"(sockaddr), "d"(addrlen)
+    : "rcx", "r11"
+  );
+  return rtn;
+}
+
+#define SYS_LISTEN 50
+int listen(int fd, int backlog) {
+  int rtn;
+  asm volatile(
+    "syscall\n"
+    : "=a"(rtn)
+    : "a"(SYS_LISTEN), "D"(fd), "S"(backlog)
+    : "rcx", "r11"
+  );
+  return rtn;
+}
+
+#define SYS_ACCEPT 43
+int accept(int fd, void* addr, uint64_t* addrlen) {
+  int rtn;
+  asm volatile(
+    "syscall\n"
+    : "=a"(rtn)
+    : "a"(SYS_ACCEPT), "D"(fd), "S"(addr), "d"(addrlen)
+    : "rcx", "r11", "memory"
+  );
+  return rtn;
+}
+
+#define SYS_CONNECT 42
+int connect(int fd, void* addr, uint64_t addrlen) {
+  int rtn;
+  asm volatile(
+    "syscall\n"
+    : "=a"(rtn)
+    : "a"(SYS_CONNECT), "D"(fd), "S"(addr), "d"(addrlen)
+    : "rcx", "r11"
+  );
+  return rtn;
+}
+
+#define SYS_SENDTO 44
+int64_t sendto(int fd, const void* buf, uint64_t size, int flags, const void* sockaddr, uint64_t addrlen) {
+  int64_t nsent;
+  asm volatile(
+    "mov %5, %%r10\n"
+    "mov %6, %%r8\n"
+    "mov %7, %%r9\n"
+    "syscall\n"
+    : "=a"(nsent)
+    : "a"(SYS_SENDTO), "D"(fd), "S"(buf), "d"(size), "r"((int64_t)flags), "r"(sockaddr), "r"(addrlen)
+    : "rcx", "r11"
+  );
+  return nsent;
+}
+
+#define SYS_RECVFROM 45
+int64_t recvfrom(int fd, const void* buf, uint64_t size, int flags, const void* sockaddr, uint64_t addrlen) {
+  int64_t nrecv;
+  asm volatile(
+    "mov %5, %%r10\n"
+    "mov %6, %%r8\n"
+    "mov %7, %%r9\n"
+    "syscall\n"
+    : "=a"(nrecv)
+    : "a"(SYS_RECVFROM), "D"(fd), "S"(buf), "d"(size), "r"((int64_t)flags), "r"(sockaddr), "r"(addrlen)
+    : "rcx", "r11", "memory"
+  );
+  return nrecv;
+}
+
 #endif /* ifdef __x86_64__ */