Commit a8646f43 authored by Jordan Niethe's avatar Jordan Niethe Committed by Michael Ellerman
Browse files

powerpc/kprobes: Use patch_instruction() 



Instead of using memcpy() and flush_icache_range() use
patch_instruction() which not only accomplishes both of these steps but
will also make it easier to add support for prefixed instructions.

Signed-off-by: default avatarJordan Niethe <jniethe5@gmail.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Reviewed-by: default avatarAlistair Popple <alistair@popple.id.au>
Link: https://lore.kernel.org/r/20200506034050.24806-16-jniethe5@gmail.com
parent 95b980a0

arch/powerpc/kernel/kprobes.c

+1 −4
Original line number Diff line number Diff line
@@ -125,11 +125,8 @@ int arch_prepare_kprobe(struct kprobe *p) 
	}



	if (!ret) {

		memcpy(p->ainsn.insn, p->addr,

				MAX_INSN_SIZE * sizeof(kprobe_opcode_t));

		patch_instruction((struct ppc_inst *)p->ainsn.insn, insn);

		p->opcode = ppc_inst_val(insn);

		flush_icache_range((unsigned long)p->ainsn.insn,

			(unsigned long)p->ainsn.insn + sizeof(kprobe_opcode_t));

	}



	p->ainsn.boostable = 0;