[PATCH v8 15/30] powerpc/kprobes: Use patch_instruction()
From: Jordan Niethe <hidden>
Date: 2020-05-06 04:12:37
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
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. Reviewed-by: Alistair Popple <redacted> Signed-off-by: Jordan Niethe <redacted> --- v6: New to series. --- arch/powerpc/kernel/kprobes.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/arch/powerpc/kernel/kprobes.c b/arch/powerpc/kernel/kprobes.c
index f64312dca84f..a72c8e1a42ad 100644
--- a/arch/powerpc/kernel/kprobes.c
+++ b/arch/powerpc/kernel/kprobes.c@@ -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;
--
2.17.1