linux_old1/arch/x86/um/vdso/vdso-note.S

/*
 * This supplies .note.* sections to go into the PT_NOTE inside the vDSO text.
 * Here we can supply some information useful to userland.
 */

#include <linux/uts.h>
#include <linux/version.h>
#include <linux/elfnote.h>

ELFNOTE_START(Linux, 0, "a")
	.long LINUX_VERSION_CODE
ELFNOTE_END
um: implement a x86_64 vDSO Until now UML had no x86_64 vDSO. So glibc always used the vsyscall page for gettimeday() and friends. Calls to gettimeday() returned falsely the host time and confused some programs. This patch adds a vDSO which turns all __vdso_* calls into a system call so that UML can trap them. As glibc still uses the vsyscall page for static binaries this patch improves the situation only for dynamic binaries. Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 2011-07-26 08:12:54 +08:00			`/*`
			`* This supplies .note.* sections to go into the PT_NOTE inside the vDSO text.`
			`* Here we can supply some information useful to userland.`
			`*/`

			`#include <linux/uts.h>`
			`#include <linux/version.h>`
			`#include <linux/elfnote.h>`

			`ELFNOTE_START(Linux, 0, "a")`
			`.long LINUX_VERSION_CODE`
			`ELFNOTE_END`