Make syscall invocations look pleasant.

Old: Syscall::invoke(Syscall::SC_foo, (dword)arg1, (dword)arg2)
New: syscall(SC_foo, arg1, arg2)

Kernel/Syscall.h

@@ -67,12 +67,6 @@
     __ENUMERATE_SYSCALL(utime) \
     __ENUMERATE_SYSCALL(sync) \
 
-
-#define DO_SYSCALL_A0(function) Syscall::invoke((dword)(function))
-#define DO_SYSCALL_A1(function, arg1) Syscall::invoke((dword)(function), (dword)(arg1))
-#define DO_SYSCALL_A2(function, arg1, arg2) Syscall::invoke((dword)(function), (dword)(arg1), (dword)(arg2))
-#define DO_SYSCALL_A3(function, arg1, arg2, arg3) Syscall::invoke((dword)(function), (dword)(arg1), (dword)(arg2), (dword)arg3)
-
 namespace Syscall {
 
 enum Function {
@@ -112,25 +106,34 @@ inline dword invoke(Function function)
     return result;
 }
 
-inline dword invoke(Function function, dword arg1)
+template<typename T1>
+inline dword invoke(Function function, T1 arg1)
 {
     dword result;
-    asm volatile("int $0x80":"=a"(result):"a"(function),"d"(arg1):"memory");
+    asm volatile("int $0x80":"=a"(result):"a"(function),"d"((dword)arg1):"memory");
     return result;
 }
 
-inline dword invoke(Function function, dword arg1, dword arg2)
+template<typename T1, typename T2>
+inline dword invoke(Function function, T1 arg1, T2 arg2)
 {
     dword result;
-    asm volatile("int $0x80":"=a"(result):"a"(function),"d"(arg1),"c"(arg2):"memory");
+    asm volatile("int $0x80":"=a"(result):"a"(function),"d"((dword)arg1),"c"((dword)arg2):"memory");
     return result;
 }
 
-inline dword invoke(Function function, dword arg1, dword arg2, dword arg3)
+template<typename T1, typename T2, typename T3>
+inline dword invoke(Function function, T1 arg1, T2 arg2, T3 arg3)
 {
     dword result;
-    asm volatile("int $0x80":"=a"(result):"a"(function),"d"(arg1),"c"(arg2),"b"(arg3):"memory");
+    asm volatile("int $0x80":"=a"(result):"a"(function),"d"((dword)arg1),"c"((dword)arg2),"b"((dword)arg3):"memory");
     return result;
 }
 
 }
+
+#undef __ENUMERATE_SYSCALL
+#define __ENUMERATE_SYSCALL(x) using Syscall::SC_ ##x;
+    ENUMERATE_SYSCALLS
+#undef __ENUMERATE_SYSCALL
+#define syscall Syscall::invoke

LibC/dirent.cpp

@@ -53,7 +53,7 @@ dirent* readdir(DIR* dirp)
     if (!dirp->buffer) {
         // FIXME: Figure out how much to actually allocate.
         dirp->buffer = (char*)malloc(4096);
-        ssize_t nread = Syscall::invoke(Syscall::SC_get_dir_entries, (dword)dirp->fd, (dword)dirp->buffer, 4096);
+        ssize_t nread = syscall(SC_get_dir_entries, dirp->fd, dirp->buffer, 4096);
         dirp->buffer_size = nread;
         dirp->nextptr = dirp->buffer;
     }

LibC/entry.cpp

@@ -23,10 +23,10 @@ extern "C" int _start()
     int status = 254;
     int argc;
     char** argv;
-    int rc = Syscall::invoke(Syscall::SC_get_arguments, (dword)&argc, (dword)&argv);
+    int rc = syscall(SC_get_arguments, &argc, &argv);
     if (rc < 0)
         goto epilogue;
-    rc = Syscall::invoke(Syscall::SC_get_environment, (dword)&environ);
+    rc = syscall(SC_get_environment, &environ);
     if (rc < 0)
         goto epilogue;
     status = main(argc, argv);
@@ -35,7 +35,7 @@ extern "C" int _start()
     fflush(stderr);
 
 epilogue:
-    Syscall::invoke(Syscall::SC_exit, status);
+    syscall(SC_exit, status);
 
     // Birger's birthday <3
     return 20150614;

LibC/fcntl.cpp

@@ -11,7 +11,7 @@ int fcntl(int fd, int cmd, ...)
     va_list ap;
     va_start(ap, cmd);
     dword extra_arg = va_arg(ap, dword);
-    int rc = Syscall::invoke(Syscall::SC_fcntl, (dword)fd, (dword)cmd, extra_arg);
+    int rc = syscall(SC_fcntl, fd, cmd, extra_arg);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 

LibC/ioctl.cpp

@@ -11,7 +11,7 @@ int ioctl(int fd, unsigned request, ...)
     va_list ap;
     va_start(ap, request);
     unsigned arg = va_arg(ap, unsigned);
-    int rc = Syscall::invoke(Syscall::SC_ioctl, (dword)fd, (dword)request, (dword)arg);
+    int rc = syscall(SC_ioctl, fd, request, arg);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 

LibC/mman.cpp

@@ -8,19 +8,19 @@ extern "C" {
 void* mmap(void* addr, size_t size, int prot, int flags, int fd, off_t offset)
 {
     Syscall::SC_mmap_params params { (dword)addr, size, prot, flags, fd, offset };
-    int rc = Syscall::invoke(Syscall::SC_mmap, (dword)&params);
+    int rc = syscall(SC_mmap, &params);
     __RETURN_WITH_ERRNO(rc, (void*)rc, (void*)-1);
 }
 
 int munmap(void* addr, size_t size)
 {
-    int rc = Syscall::invoke(Syscall::SC_munmap, (dword)addr, (dword)size);
+    int rc = syscall(SC_munmap, addr, size);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
 int set_mmap_name(void* addr, size_t size, const char* name)
 {
-    int rc = Syscall::invoke(Syscall::SC_set_mmap_name, (dword)addr, (dword)size, (dword)name);
+    int rc = syscall(SC_set_mmap_name, addr, size, name);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 

LibC/signal.cpp

@@ -8,13 +8,13 @@ extern "C" {
 
 int kill(pid_t pid, int sig)
 {
-    int rc = Syscall::invoke(Syscall::SC_kill, (dword)pid, (dword)sig);
+    int rc = syscall(SC_kill, pid, sig);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
 int killpg(int pgrp, int sig)
 {
-    int rc = Syscall::invoke(Syscall::SC_killpg, (dword)pgrp, (dword)sig);
+    int rc = syscall(SC_killpg, pgrp, sig);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
@@ -34,7 +34,7 @@ sighandler_t signal(int signum, sighandler_t handler)
 
 int sigaction(int signum, const struct sigaction* act, struct sigaction* old_act)
 {
-    int rc = Syscall::invoke(Syscall::SC_sigaction, (dword)signum, (dword)act, (dword)old_act);
+    int rc = syscall(SC_sigaction, signum, act, old_act);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
@@ -83,13 +83,13 @@ int sigismember(const sigset_t* set, int sig)
 
 int sigprocmask(int how, const sigset_t* set, sigset_t* old_set)
 {
-    int rc = Syscall::invoke(Syscall::SC_sigprocmask, (dword)how, (dword)set, (dword)old_set);
+    int rc = syscall(SC_sigprocmask, how, set, old_set);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
 int sigpending(sigset_t* set)
 {
-    int rc = Syscall::invoke(Syscall::SC_sigpending, (dword)set);
+    int rc = syscall(SC_sigpending, set);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 

LibC/stat.cpp

@@ -6,12 +6,12 @@ extern "C" {
 
 mode_t umask(mode_t mask)
 {
-    return Syscall::invoke(Syscall::SC_umask, (dword)mask);
+    return syscall(SC_umask, mask);
 }
 
 int mkdir(const char* pathname, mode_t mode)
 {
-    int rc = Syscall::invoke(Syscall::SC_mkdir, (dword)pathname, (dword)mode);
+    int rc = syscall(SC_mkdir, pathname, mode);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 

LibC/time.cpp

@@ -18,7 +18,7 @@ time_t time(time_t* tloc)
 
 int gettimeofday(struct timeval* tv, struct timezone*)
 {
-    int rc = Syscall::invoke(Syscall::SC_gettimeofday, (dword)tv);
+    int rc = syscall(SC_gettimeofday, tv);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 

LibC/times.cpp

@@ -4,6 +4,6 @@
 
 clock_t times(struct tms* buf)
 {
-    int rc = Syscall::invoke(Syscall::SC_times, (dword)buf);
+    int rc = syscall(SC_times, buf);
     __RETURN_WITH_ERRNO(rc, rc, (clock_t)-1);
 }

LibC/unistd.cpp

@@ -13,49 +13,49 @@ extern "C" {
 
 pid_t fork()
 {
-    int rc = Syscall::invoke(Syscall::SC_fork);
+    int rc = syscall(SC_fork);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
 int execve(const char* filename, const char** argv, const char** envp)
 {
-    int rc = Syscall::invoke(Syscall::SC_execve, (dword)filename, (dword)argv, (dword)envp);
+    int rc = syscall(SC_execve, filename, argv, envp);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
 uid_t getuid()
 {
-    return Syscall::invoke(Syscall::SC_getuid);
+    return syscall(SC_getuid);
 }
 
 gid_t getgid()
 {
-    return Syscall::invoke(Syscall::SC_getgid);
+    return syscall(SC_getgid);
 }
 
 uid_t geteuid()
 {
-    return Syscall::invoke(Syscall::SC_geteuid);
+    return syscall(SC_geteuid);
 }
 
 gid_t getegid()
 {
-    return Syscall::invoke(Syscall::SC_getegid);
+    return syscall(SC_getegid);
 }
 
 pid_t getpid()
 {
-    return Syscall::invoke(Syscall::SC_getpid);
+    return syscall(SC_getpid);
 }
 
 pid_t getppid()
 {
-    return Syscall::invoke(Syscall::SC_getppid);
+    return syscall(SC_getppid);
 }
 
 pid_t setsid()
 {
-    int rc = Syscall::invoke(Syscall::SC_setsid);
+    int rc = syscall(SC_setsid);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
@@ -71,19 +71,19 @@ int tcsetpgrp(int fd, pid_t pgid)
 
 int setpgid(pid_t pid, pid_t pgid)
 {
-    int rc = Syscall::invoke(Syscall::SC_setpgid, (dword)pid, (dword)pgid);
+    int rc = syscall(SC_setpgid, pid, pgid);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
 pid_t getpgid(pid_t pid)
 {
-    int rc = Syscall::invoke(Syscall::SC_getpgid, (dword)pid);
+    int rc = syscall(SC_getpgid, pid);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
 pid_t getpgrp()
 {
-    int rc = Syscall::invoke(Syscall::SC_getpgrp);
+    int rc = syscall(SC_getpgrp);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
@@ -91,26 +91,26 @@ int open(const char* path, int options, ...)
 {
     va_list ap;
     va_start(ap, options);
-    int rc = Syscall::invoke(Syscall::SC_open, (dword)path, (dword)options, (dword)ap);
+    int rc = syscall(SC_open, path, options, ap);
     va_end(ap);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
 ssize_t read(int fd, void* buf, size_t count)
 {
-    int rc = Syscall::invoke(Syscall::SC_read, (dword)fd, (dword)buf, (dword)count);
+    int rc = syscall(SC_read, fd, buf, count);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
 ssize_t write(int fd, const void* buf, size_t count)
 {
-    int rc = Syscall::invoke(Syscall::SC_write, (dword)fd, (dword)buf, (dword)count);
+    int rc = syscall(SC_write, fd, buf, count);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
 int ttyname_r(int fd, char* buffer, size_t size)
 {
-    int rc = Syscall::invoke(Syscall::SC_ttyname_r, (dword)fd, (dword)buffer, (dword)size);
+    int rc = syscall(SC_ttyname_r, fd, buffer, size);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
@@ -124,43 +124,43 @@ char* ttyname(int fd)
 
 int close(int fd)
 {
-    int rc = Syscall::invoke(Syscall::SC_close, fd);
+    int rc = syscall(SC_close, fd);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
 pid_t waitpid(pid_t waitee, int* wstatus, int options)
 {
-    int rc = Syscall::invoke(Syscall::SC_waitpid, waitee, (dword)wstatus, (dword)options);
+    int rc = syscall(SC_waitpid, waitee, wstatus, options);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
 int lstat(const char* path, struct stat* statbuf)
 {
-    int rc = Syscall::invoke(Syscall::SC_lstat, (dword)path, (dword)statbuf);
+    int rc = syscall(SC_lstat, path, statbuf);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
 int stat(const char* path, struct stat* statbuf)
 {
-    int rc = Syscall::invoke(Syscall::SC_stat, (dword)path, (dword)statbuf);
+    int rc = syscall(SC_stat, path, statbuf);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
 int fstat(int fd, struct stat *statbuf)
 {
-    int rc = Syscall::invoke(Syscall::SC_fstat, (dword)fd, (dword)statbuf);
+    int rc = syscall(SC_fstat, fd, statbuf);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
 int chdir(const char* path)
 {
-    int rc = Syscall::invoke(Syscall::SC_chdir, (dword)path);
+    int rc = syscall(SC_chdir, path);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
 char* getcwd(char* buffer, size_t size)
 {
-    int rc = Syscall::invoke(Syscall::SC_getcwd, (dword)buffer, (dword)size);
+    int rc = syscall(SC_getcwd, buffer, size);
     __RETURN_WITH_ERRNO(rc, buffer, nullptr);
 }
 
@@ -172,24 +172,24 @@ char* getwd(char* buf)
 
 int sleep(unsigned seconds)
 {
-    return Syscall::invoke(Syscall::SC_sleep, (dword)seconds);
+    return syscall(SC_sleep, seconds);
 }
 
 int gethostname(char* buffer, size_t size)
 {
-    int rc = Syscall::invoke(Syscall::SC_gethostname, (dword)buffer, (dword)size);
+    int rc = syscall(SC_gethostname, buffer, size);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
 ssize_t readlink(const char* path, char* buffer, size_t size)
 {
-    int rc = Syscall::invoke(Syscall::SC_readlink, (dword)path, (dword)buffer, (dword)size);
+    int rc = syscall(SC_readlink, path, buffer, size);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
 off_t lseek(int fd, off_t offset, int whence)
 {
-    int rc = Syscall::invoke(Syscall::SC_lseek, (dword)fd, (dword)offset, (dword)whence);
+    int rc = syscall(SC_lseek, fd, offset, whence);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
@@ -205,66 +205,66 @@ int unlink(const char*)
 
 int isatty(int fd)
 {
-    int rc = Syscall::invoke(Syscall::SC_isatty, (dword)fd);
+    int rc = syscall(SC_isatty, fd);
     __RETURN_WITH_ERRNO(rc, 1, 0);
 }
 
 int getdtablesize()
 {
-    int rc = Syscall::invoke(Syscall::SC_getdtablesize);
+    int rc = syscall(SC_getdtablesize);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
 int dup(int old_fd)
 {
-    int rc = Syscall::invoke(Syscall::SC_dup, (dword)old_fd);
+    int rc = syscall(SC_dup, old_fd);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
 int dup2(int old_fd, int new_fd)
 {
-    int rc = Syscall::invoke(Syscall::SC_dup2, (dword)old_fd, (dword)new_fd);
+    int rc = syscall(SC_dup2, old_fd, new_fd);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
 int setgroups(size_t size, const gid_t* list)
 {
-    int rc = Syscall::invoke(Syscall::SC_getgroups, (dword)size, (dword)list);
+    int rc = syscall(SC_getgroups, size, list);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
 int getgroups(int size, gid_t list[])
 {
-    int rc = Syscall::invoke(Syscall::SC_getgroups, (dword)size, (dword)list);
+    int rc = syscall(SC_getgroups, size, list);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
 int pipe(int pipefd[2])
 {
-    int rc = Syscall::invoke(Syscall::SC_pipe, (dword)pipefd);
+    int rc = syscall(SC_pipe, pipefd);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
 unsigned int alarm(unsigned int seconds)
 {
-    return Syscall::invoke(Syscall::SC_alarm, (dword)seconds);
+    return syscall(SC_alarm, seconds);
 }
 
 int setuid(uid_t uid)
 {
-    int rc = Syscall::invoke(Syscall::SC_setuid, (dword)uid);
+    int rc = syscall(SC_setuid, uid);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
 int setgid(uid_t gid)
 {
-    int rc = Syscall::invoke(Syscall::SC_setgid, (dword)gid);
+    int rc = syscall(SC_setgid, gid);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
 int access(const char* pathname, int mode)
 {
-    int rc = Syscall::invoke(Syscall::SC_access, (dword)pathname, (dword)mode);
+    int rc = syscall(SC_access, pathname, mode);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
@@ -290,13 +290,13 @@ long pathconf(const char* path, int name)
 
 void _exit(int status)
 {
-    Syscall::invoke(Syscall::SC_exit, (dword)status);
+    syscall(SC_exit, status);
     assert(false);
 }
 
 void sync()
 {
-    Syscall::invoke(Syscall::SC_sync);
+    syscall(SC_sync);
 }
 
 }

LibC/utime.cpp

@@ -6,7 +6,7 @@ extern "C" {
 
 int utime(const char* pathname, const struct utimbuf* buf)
 {
-    int rc = Syscall::invoke(Syscall::SC_utime, (dword)pathname, (dword)buf);
+    int rc = syscall(SC_utime, (dword)pathname, (dword)buf);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 

LibC/utsname.cpp

@@ -6,7 +6,7 @@ extern "C" {
 
 int uname(struct utsname* buf)
 {
-    int rc = Syscall::invoke(Syscall::SC_uname, (dword)buf);
+    int rc = syscall(SC_uname, buf);
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }