On May 7, 2018 2:37:55 PM PDT, Alexey Dobriyan <adobri...@gmail.com> wrote: >Use INT3 instead of NOP. All that padding between functions is >an illegal area, no legitimate code should jump into it. > >I've checked x86_64 allyesconfig disassembly, all changes looks sane: >INT3 is only used after RET or unconditional JMP. > >Signed-off-by: Alexey Dobriyan <adobri...@gmail.com> >--- > > arch/x86/include/asm/linkage.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > >--- a/arch/x86/include/asm/linkage.h >+++ b/arch/x86/include/asm/linkage.h >@@ -18,7 +18,7 @@ > name: > > #if defined(CONFIG_X86_64) || defined(CONFIG_X86_ALIGNMENT_16) >-#define __ALIGN .p2align 4, 0x90 >+#define __ALIGN .p2align 4, 0xCC > #define __ALIGN_STR __stringify(__ALIGN) > #endif >
Acked-by: H. Peter Anvin <h.peter.anvin@in tel.com> -- Sent from my Android device with K-9 Mail. Please excuse my brevity.
