Ensure raw fchmod/fchmodat syscalls are hidden.
In https://android-review.googlesource.com/#/c/127908/5/libc/SYSCALLS.TXT@116
Elliott said:
for LP64 these will be hidden. for LP32 we were cowards and left
them all public for compatibility (though i don't think we ever
dremeled to see whether it was needed). we don't have an easy
way to recognize additions, though, so we can't prevent adding
new turds.
Add a mechanism to prevent the adding of new turds, and use that
mechanism on the fchmod/fchmodat system calls.
Bug: 19233951
Change-Id: I98f98345970b631a379f348df57858f9fc3d57c0
diff --git a/libc/arch-arm64/syscalls/___fchmodat.S b/libc/arch-arm64/syscalls/___fchmodat.S
new file mode 100644
index 0000000..1ab3736
--- /dev/null
+++ b/libc/arch-arm64/syscalls/___fchmodat.S
@@ -0,0 +1,15 @@
+/* Generated by gensyscalls.py. Do not edit. */
+
+#include <private/bionic_asm.h>
+
+ENTRY(___fchmodat)
+ mov x8, __NR_fchmodat
+ svc #0
+
+ cmn x0, #(MAX_ERRNO + 1)
+ cneg x0, x0, hi
+ b.hi __set_errno_internal
+
+ ret
+END(___fchmodat)
+.hidden ___fchmodat