diff options
| author | Andy Lutomirski <luto@MIT.EDU> | 2011-08-03 09:31:54 -0400 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2011-08-04 16:13:53 -0700 |
| commit | c149a665ac488e0dac22a42287f45ad1bda06ff1 (patch) | |
| tree | 0f2d945f47e98ae5aefb779850a39bb7462c4417 /arch/x86/kernel/vsyscall_64.c | |
| parent | 318f5a2a672152328c9fb4dead504b89ec738a43 (diff) | |
x86-64: Add vsyscall:emulate_vsyscall trace event
Vsyscall emulation is slow, so make it easy to track down.
Signed-off-by: Andy Lutomirski <luto@mit.edu>
Link: http://lkml.kernel.org/r/cdaad7da946a80b200df16647c1700db3e1171e9.1312378163.git.luto@mit.edu
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/kernel/vsyscall_64.c')
| -rw-r--r-- | arch/x86/kernel/vsyscall_64.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kernel/vsyscall_64.c b/arch/x86/kernel/vsyscall_64.c index 1725930a6f9..93a0d46d956 100644 --- a/arch/x86/kernel/vsyscall_64.c +++ b/arch/x86/kernel/vsyscall_64.c @@ -50,6 +50,9 @@ #include <asm/vgtod.h> #include <asm/traps.h> +#define CREATE_TRACE_POINTS +#include "vsyscall_trace.h" + DEFINE_VVAR(int, vgetcpu_mode); DEFINE_VVAR(struct vsyscall_gtod_data, vsyscall_gtod_data) = { @@ -146,6 +149,9 @@ void dotraplinkage do_emulate_vsyscall(struct pt_regs *regs, long error_code) * and int 0xcc is two bytes long. */ vsyscall_nr = addr_to_vsyscall_nr(regs->ip - 2); + + trace_emulate_vsyscall(vsyscall_nr); + if (vsyscall_nr < 0) { warn_bad_vsyscall(KERN_WARNING, regs, "illegal int 0xcc (exploit attempt?)"); |