libc: add <sys/eventfd.h> and corresponding implementations.
Change-Id: Ide040884c456190226e580513099fdb8377e015b
diff --git a/libc/arch-sh/syscalls.mk b/libc/arch-sh/syscalls.mk
index 47b5a1e..a87419d 100644
--- a/libc/arch-sh/syscalls.mk
+++ b/libc/arch-sh/syscalls.mk
@@ -161,3 +161,4 @@
syscall_src += arch-sh/syscalls/inotify_add_watch.S
syscall_src += arch-sh/syscalls/inotify_rm_watch.S
syscall_src += arch-sh/syscalls/poll.S
+syscall_src += arch-sh/syscalls/eventfd.S
diff --git a/libc/arch-sh/syscalls/eventfd.S b/libc/arch-sh/syscalls/eventfd.S
new file mode 100644
index 0000000..c73bf23
--- /dev/null
+++ b/libc/arch-sh/syscalls/eventfd.S
@@ -0,0 +1,32 @@
+/* autogenerated by gensyscalls.py */
+#include <sys/linux-syscalls.h>
+
+ .text
+ .type eventfd, @function
+ .globl eventfd
+ .align 4
+
+eventfd:
+
+ /* invoke trap */
+ mov.l 0f, r3 /* trap num */
+ trapa #(2 + 0x10)
+
+ /* check return value */
+ cmp/pz r0
+ bt __NR_eventfd2_end
+
+ /* keep error number */
+ sts.l pr, @-r15
+ mov.l 1f, r1
+ jsr @r1
+ mov r0, r4
+ lds.l @r15+, pr
+
+__NR_eventfd2_end:
+ rts
+ nop
+
+ .align 2
+0: .long __NR_eventfd2
+1: .long __set_syscall_errno