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authorMarcin Nowakowski <marcin.nowakowski@imgtec.com>2016-08-11 09:02:30 +0200
committerRalf Baechle <ralf@linux-mips.org>2016-09-13 14:13:26 +0200
commit2809328f6ef2139115665dda1b83ee9303c52431 (patch)
tree326cf2150be2ab513c4bb9321b96c9ee30b2de26 /arch/mips/kernel
parente3b23148fd8af277fd55068183ed3ce4c8f51aa5 (diff)
downloadlinux-2809328f6ef2139115665dda1b83ee9303c52431.tar.bz2
MIPS: uprobes: fix incorrect uprobe brk handling
When a uprobe-replacement breakpoint instruction is handled, a notifier is called with DIE_UPROBE argument, but a corresponding exception notify handler for MIPS attempts to handle DIE_BREAK instead. As a result the breakpoint instruction isn't handled by the uprobe code and the probed application terminates with SIGTRAP. Fix this by changing arch_uprobe_exception_notify code to handle DIE_UPROBE as a pre-singlestep condition instead of DIE_BREAK. Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/13884/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel')
-rw-r--r--arch/mips/kernel/uprobes.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/mips/kernel/uprobes.c b/arch/mips/kernel/uprobes.c
index 8452d933a645..1149b30c9aeb 100644
--- a/arch/mips/kernel/uprobes.c
+++ b/arch/mips/kernel/uprobes.c
@@ -222,7 +222,7 @@ int arch_uprobe_exception_notify(struct notifier_block *self,
return NOTIFY_DONE;
switch (val) {
- case DIE_BREAK:
+ case DIE_UPROBE:
if (uprobe_pre_sstep_notifier(regs))
return NOTIFY_STOP;
break;