x86: kprobe-booster for x86-64

[mirror_ubuntu-artful-kernel.git] / include / asm-x86 / kprobes_64.h

diff --git a/include/asm-x86/kprobes_64.h b/include/asm-x86/kprobes_64.h
index 8c919d35cdd3ad69ffc4b75044cd3db513545b5f..e7e921dac7c2bf8b7ab11a692ac7abe389a036ef 100644 (file)
--- a/include/asm-x86/kprobes_64.h
+++ b/include/asm-x86/kprobes_64.h
@@ -34,6 +34,7 @@ struct kprobe;
 
 typedef u8 kprobe_opcode_t;
 #define BREAKPOINT_INSTRUCTION 0xcc
+#define RELATIVEJUMP_INSTRUCTION 0xe9
 #define MAX_INSN_SIZE 15
 #define MAX_STACK_SIZE 64
 #define MIN_STACK_SIZE(ADDR) (((MAX_STACK_SIZE) < \
@@ -52,6 +53,15 @@ extern void arch_remove_kprobe(struct kprobe *p);
 struct arch_specific_insn {
        /* copy of the original instruction */
        kprobe_opcode_t *insn;
+       /*
+        * boostable = -1: This instruction type is not boostable.
+        * boostable = 0: This instruction type is boostable.
+        * boostable = 1: This instruction has been boosted: we have
+        * added a relative jump after the instruction copy in insn,
+        * so no single-step and fixup are needed (unless there's
+        * a post_handler or break_handler).
+        */
+       int boostable;
 };
 
 struct prev_kprobe {