libc: implement kernel vdso syscalls for i386
This patch uses __kernel_vsyscall instead of "int 0x80"
as the syscall entry point. AT_SYSINFO points to
an adapter to mask the arch specific difference and gives a
performance boost on i386 architecture.
Bug: http://b/27533895
Change-ID: Ib340c604d02c6c25714a95793737e3cfdc3fc5d7
Signed-off-by: Mingwei Shi <mingwei.shi@intel.com>
(cherry picked from commit be910529322b461148debefd50b9e0d67ae84f8e)
diff --git a/linker/linker.h b/linker/linker.h
index 65a8373..a27374c 100644
--- a/linker/linker.h
+++ b/linker/linker.h
@@ -274,6 +274,7 @@
bool prelink_image();
bool link_image(const soinfo_list_t& global_group, const soinfo_list_t& local_group,
const android_dlextinfo* extinfo);
+ bool protect_relro();
void add_child(soinfo* child);
void remove_all_links();