leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

powerpc/kprobes: Use patch_instruction()

Browse Source 
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: Jordan Niethe <jniethe5@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Alistair Popple <alistair@popple.id.au>
Link: https://lore.kernel.org/r/20200506034050.24806-16-jniethe5@gmail.com
This commit is contained in:
Jordan Niethe 2020-05-06 13:40:35 +10:00 committed by Michael Ellerman
parent 95b980a00d
commit a8646f43ba
1 changed files with 1 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/powerpc/kernel/kprobes.c
View File

@ -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;