Add eventfd system call support
diff --git a/libc/arch-arm/syscalls.mk b/libc/arch-arm/syscalls.mk
index 9cdd28a..9bfe70a 100644
--- a/libc/arch-arm/syscalls.mk
+++ b/libc/arch-arm/syscalls.mk
@@ -171,3 +171,4 @@
syscall_src += arch-arm/syscalls/poll.S
syscall_src += arch-arm/syscalls/__set_tls.S
syscall_src += arch-arm/syscalls/cacheflush.S
+syscall_src += arch-arm/syscalls/eventfd.S
diff --git a/libc/arch-arm/syscalls/eventfd.S b/libc/arch-arm/syscalls/eventfd.S
new file mode 100644
index 0000000..fb0912f
--- /dev/null
+++ b/libc/arch-arm/syscalls/eventfd.S
@@ -0,0 +1,19 @@
+/* autogenerated by gensyscalls.py */
+#include <sys/linux-syscalls.h>
+
+ .text
+ .type eventfd, #function
+ .globl eventfd
+ .align 4
+ .fnstart
+
+eventfd:
+ .save {r4, r7}
+ stmfd sp!, {r4, r7}
+ ldr r7, =__NR_eventfd
+ swi #0
+ ldmfd sp!, {r4, r7}
+ movs r0, r0
+ bxpl lr
+ b __set_syscall_errno
+ .fnend