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| author | Masami Hiramatsu <mhiramat@kernel.org> | 2018-04-25 21:20:57 +0900 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2018-10-10 22:19:11 -0400 |
| commit | 3c88ee194c288205733d248b51f0aca516ff4940 (patch) | |
| tree | ceef87990d31031cf3da6146678096bd86ba4cdf /arch/x86/Kconfig | |
| parent | 40b53b771806b1770837169cd32d1bf167fbccaf (diff) | |
| download | linux-3c88ee194c288205733d248b51f0aca516ff4940.tar.bz2 | |
x86: ptrace: Add function argument access API
Add regs_get_argument() which returns N th argument of the
function call.
Note that this chooses most probably assignment, in some case
it can be incorrect (e.g. passing data structure or floating
point etc.)
This is expected to be called from kprobes or ftrace with regs
where the top of stack is the return address.
Link: http://lkml.kernel.org/r/152465885737.26224.2822487520472783854.stgit@devbox
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'arch/x86/Kconfig')
| -rw-r--r-- | arch/x86/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 1a0be022f91d..972973851779 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -184,6 +184,7 @@ config X86 select HAVE_RCU_TABLE_INVALIDATE if HAVE_RCU_TABLE_FREE select HAVE_REGS_AND_STACK_ACCESS_API select HAVE_RELIABLE_STACKTRACE if X86_64 && (UNWINDER_FRAME_POINTER || UNWINDER_ORC) && STACK_VALIDATION + select HAVE_FUNCTION_ARG_ACCESS_API select HAVE_STACKPROTECTOR if CC_HAS_SANE_STACKPROTECTOR select HAVE_STACK_VALIDATION if X86_64 select HAVE_RSEQ |