path: root/src/internal/syscall.h
diff options
authorRich Felker <>2011-03-19 21:36:10 -0400
committerRich Felker <>2011-03-19 21:36:10 -0400
commit685e40bb09f5f24a2af54ea09c97328808f76990 (patch)
tree73bbf60045bb3a9c8af4f2639e8adb2ad1ea6994 /src/internal/syscall.h
parent462dbfc20788a6c9dd1ea4bb1cef086aa189615a (diff)
syscall overhaul part two - unify public and internal syscall interface
with this patch, the syscallN() functions are no longer needed; a variadic syscall() macro allows syscalls with anywhere from 0 to 6 arguments to be made with a single macro name. also, manually casting each non-integer argument with (long) is no longer necessary; the casts are hidden in the macros. some source files which depended on being able to define the old macro SYSCALL_RETURNS_ERRNO have been modified to directly use __syscall() instead of syscall(). references to SYSCALL_SIGSET_SIZE and SYSCALL_LL have also been changed. x86_64 has not been tested, and may need a follow-up commit to fix any minor bugs/oversights.
Diffstat (limited to 'src/internal/syscall.h')
1 files changed, 32 insertions, 0 deletions
diff --git a/src/internal/syscall.h b/src/internal/syscall.h
new file mode 100644
index 00000000..819aafe6
--- /dev/null
+++ b/src/internal/syscall.h
@@ -0,0 +1,32 @@
+#ifndef _SYSCALL_H
+#define _SYSCALL_H
+/* This header is mostly useless leftover wrapper cruft */
+#include <sys/syscall.h>
+#define syscall0 syscall
+#define syscall1 syscall
+#define syscall2 syscall
+#define syscall3 syscall
+#define syscall4 syscall
+#define syscall5 syscall
+#define syscall6 syscall
+#define socketcall __socketcall
+/* the following are needed for iso c functions to use */
+#define __syscall_open(filename, flags, mode) syscall(__NR_open, (filename), (flags)|0100000, (mode))
+#define __syscall_read(fd, buf, len) syscall(__NR_read, (fd), (buf), (len))
+#define __syscall_write(fd, buf, len) syscall(__NR_write, (fd), (buf), (len))
+#define __syscall_close(fd) syscall(__NR_close, (fd))
+#define __syscall_fcntl(fd, cmd, arg) syscall(__NR_fcntl, (fd), (cmd), (arg))
+#define __syscall_dup2(old, new) syscall(__NR_dup2, (old), (new))
+#define __syscall_unlink(path) syscall(__NR_unlink, (path))
+#define __syscall_getpid() syscall(__NR_getpid)
+#define __syscall_kill(pid,sig) syscall(__NR_kill, (pid), (sig))
+#define __syscall_sigaction(sig,new,old) syscall(__NR_rt_sigaction, (sig), (new), (old), 8)
+#define __syscall_ioctl(fd,ioc,arg) syscall(__NR_ioctl, (fd), (ioc), (arg))
+#define __syscall_exit(code) syscall(__NR_exit, code)