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| author | Chuck Ebbert <76306.1226@compuserve.com> | 2006-03-23 11:59:48 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-23 16:38:06 +0100 |
| commit | be0a39120cb6b88bd085a3a280f5c769a3ed85ad (patch) | |
| tree | 39a882518d67f22894cdec615db32aad2b070f73 | |
| parent | [PATCH] i386: fix singlestep through an int80 syscall (diff) | |
| download | linux-be0a39120cb6b88bd085a3a280f5c769a3ed85ad.tar.xz linux-be0a39120cb6b88bd085a3a280f5c769a3ed85ad.zip | |
[PATCH] i386: more vsyscall documentation
Document a limitation of vsyscall-sysenter, since patches to fix it have
been rejected.
Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | arch/i386/kernel/vsyscall-sysenter.S | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/i386/kernel/vsyscall-sysenter.S b/arch/i386/kernel/vsyscall-sysenter.S index 76b728159403..3b62baa6a371 100644 --- a/arch/i386/kernel/vsyscall-sysenter.S +++ b/arch/i386/kernel/vsyscall-sysenter.S @@ -21,6 +21,9 @@ * instruction clobbers %esp, the user's %esp won't even survive entry * into the kernel. We store %esp in %ebp. Code in entry.S must fetch * arg6 from the stack. + * + * You can not use this vsyscall for the clone() syscall because the + * three dwords on the parent stack do not get copied to the child. */ .text .globl __kernel_vsyscall |