diff options
| author | Richard Weinberger <richard@nod.at> | 2011-07-25 17:12:54 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-07-25 20:57:13 -0700 |
| commit | f1c2bb8b9964ed31de988910f8b1cfb586d30091 (patch) | |
| tree | ccf58acd47dbf659dca3087b7ebf2704ffd14aba /arch/um/sys-x86_64/vdso/checkundef.sh | |
| parent | fc9a00187ba1300a0baae8e613cc62598e1a7de7 (diff) | |
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>
Diffstat (limited to 'arch/um/sys-x86_64/vdso/checkundef.sh')
| -rw-r--r-- | arch/um/sys-x86_64/vdso/checkundef.sh | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/um/sys-x86_64/vdso/checkundef.sh b/arch/um/sys-x86_64/vdso/checkundef.sh new file mode 100644 index 00000000000..7ee90a9b549 --- /dev/null +++ b/arch/um/sys-x86_64/vdso/checkundef.sh @@ -0,0 +1,10 @@ +#!/bin/sh +nm="$1" +file="$2" +$nm "$file" | grep '^ *U' > /dev/null 2>&1 +if [ $? -eq 1 ]; then + exit 0 +else + echo "$file: undefined symbols found" >&2 + exit 1 +fi |