Add unshare system call
Adds a C function for the unshare system call supported by Linux since
2.6.16.
Change-Id: I32df4075d875e9f5b5ed716cd7b02cdf82c64526
diff --git a/libc/arch-sh/syscalls.mk b/libc/arch-sh/syscalls.mk
index 6666431..22c7f9f 100644
--- a/libc/arch-sh/syscalls.mk
+++ b/libc/arch-sh/syscalls.mk
@@ -159,6 +159,7 @@
syscall_src += arch-sh/syscalls/klogctl.S
syscall_src += arch-sh/syscalls/sysinfo.S
syscall_src += arch-sh/syscalls/personality.S
+syscall_src += arch-sh/syscalls/unshare.S
syscall_src += arch-sh/syscalls/futex.S
syscall_src += arch-sh/syscalls/epoll_create.S
syscall_src += arch-sh/syscalls/epoll_ctl.S
diff --git a/libc/arch-sh/syscalls/unshare.S b/libc/arch-sh/syscalls/unshare.S
new file mode 100644
index 0000000..59c1e7a
--- /dev/null
+++ b/libc/arch-sh/syscalls/unshare.S
@@ -0,0 +1,32 @@
+/* autogenerated by gensyscalls.py */
+#include <sys/linux-syscalls.h>
+
+ .text
+ .type unshare, @function
+ .globl unshare
+ .align 4
+
+unshare:
+
+ /* invoke trap */
+ mov.l 0f, r3 /* trap num */
+ trapa #(1 + 0x10)
+
+ /* check return value */
+ cmp/pz r0
+ bt __NR_unshare_end
+
+ /* keep error number */
+ sts.l pr, @-r15
+ mov.l 1f, r1
+ jsr @r1
+ mov r0, r4
+ lds.l @r15+, pr
+
+__NR_unshare_end:
+ rts
+ nop
+
+ .align 2
+0: .long __NR_unshare
+1: .long __set_syscall_errno