diff options
Diffstat (limited to 'arch/powerpc/kernel/ftrace.c')
| -rw-r--r-- | arch/powerpc/kernel/ftrace.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c index 7538b944fa52..5c6dfa97e838 100644 --- a/arch/powerpc/kernel/ftrace.c +++ b/arch/powerpc/kernel/ftrace.c @@ -567,6 +567,10 @@ int ftrace_disable_ftrace_graph_caller(void) } #endif /* CONFIG_DYNAMIC_FTRACE */ +#ifdef CONFIG_PPC64 +extern void mod_return_to_handler(void); +#endif + /* * Hook the return address and push it in the stack of return addrs * in current thread info. @@ -577,12 +581,17 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr) unsigned long long calltime; int faulted; struct ftrace_graph_ent trace; - unsigned long return_hooker = (unsigned long) - &return_to_handler; + unsigned long return_hooker = (unsigned long)&return_to_handler; if (unlikely(atomic_read(¤t->tracing_graph_pause))) return; +#if CONFIG_PPC64 + /* non core kernel code needs to save and restore the TOC */ + if (REGION_ID(self_addr) != KERNEL_REGION_ID) + return_hooker = (unsigned long)&mod_return_to_handler; +#endif + return_hooker = GET_ADDR(return_hooker); /* |