uprobes: Document xol_area and arch_uprobe->insn/ixol (ad439356) · Commits · e / devices / android_kernel_teracube_emerald

kernel/events/uprobes.c

+15 −0

Original line number	Diff line number	Diff line
		@@ -73,6 +73,17 @@ struct uprobe {
		struct inode inode; / Also hold a ref to inode */
		loff_t offset;
		unsigned long flags;

		/*
		* The generic code assumes that it has two members of unknown type
		* owned by the arch-specific code:
		*
		* insn - copy_insn() saves the original instruction here for
		* arch_uprobe_analyze_insn().
		*
		* ixol - potentially modified instruction to execute out of
		* line, copied to xol_area by xol_get_insn_slot().
		*/
		struct arch_uprobe arch;
		};

		@@ -86,6 +97,10 @@ struct return_instance {
		};

		/*
		* Execute out of line area: anonymous executable mapping installed
		* by the probed task to execute the copy of the original instruction
		* mangled by set_swbp().
		*
		* On a breakpoint hit, thread contests for a slot. It frees the
		* slot after singlestep. Currently a fixed number of slots are
		* allocated.