From 1a21d4e095ef720abf81299000afc038206d571b Mon Sep 17 00:00:00 2001 From: "H. J. Lu" Date: Sun, 19 Feb 2012 11:38:06 -0800 Subject: x32: Add x32 VDSO support Add support for the x32 VDSO. The x32 VDSO takes advantage of the similarity between the x86-64 and the x32 ABIs to contain the same content, only the container is different, as the x32 VDSO obviously is an x32 shared object. Signed-off-by: H. Peter Anvin --- arch/x86/vdso/vdsox32.S | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 arch/x86/vdso/vdsox32.S (limited to 'arch/x86/vdso/vdsox32.S') diff --git a/arch/x86/vdso/vdsox32.S b/arch/x86/vdso/vdsox32.S new file mode 100644 index 000000000000..d6b9a7f42a8a --- /dev/null +++ b/arch/x86/vdso/vdsox32.S @@ -0,0 +1,22 @@ +#include +#include +#include + +__PAGE_ALIGNED_DATA + + .globl vdsox32_start, vdsox32_end + .align PAGE_SIZE +vdsox32_start: + .incbin "arch/x86/vdso/vdsox32.so" +vdsox32_end: + .align PAGE_SIZE /* extra data here leaks to userspace. */ + +.previous + + .globl vdsox32_pages + .bss + .align 8 + .type vdsox32_pages, @object +vdsox32_pages: + .zero (vdsox32_end - vdsox32_start + PAGE_SIZE - 1) / PAGE_SIZE * 8 + .size vdsox32_pages, .-vdsox32_pages -- cgit v1.2.3