diff options
| author | Mike Frysinger <vapier@gentoo.org> | 2010-01-22 07:59:32 -0500 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2010-03-09 00:30:50 -0500 |
| commit | b73faf74493fd1bc75a8938aa5d296facf50a650 (patch) | |
| tree | 69edd54da1d535661ac5a14ee3aa27e5e4ca2337 /arch/blackfin | |
| parent | aebfef03249819886a7f9c981940cbd48d82ea47 (diff) | |
| download | blackbird-op-linux-b73faf74493fd1bc75a8938aa5d296facf50a650.tar.gz blackbird-op-linux-b73faf74493fd1bc75a8938aa5d296facf50a650.zip | |
Blackfin: support new ftrace frame pointer semantics
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'arch/blackfin')
| -rw-r--r-- | arch/blackfin/kernel/ftrace-entry.S | 12 | ||||
| -rw-r--r-- | arch/blackfin/kernel/ftrace.c | 6 |
2 files changed, 13 insertions, 5 deletions
diff --git a/arch/blackfin/kernel/ftrace-entry.S b/arch/blackfin/kernel/ftrace-entry.S index db3a51b0af21..d66446b572c0 100644 --- a/arch/blackfin/kernel/ftrace-entry.S +++ b/arch/blackfin/kernel/ftrace-entry.S @@ -115,9 +115,12 @@ ENTRY(_ftrace_graph_caller) [--sp] = r1; [--sp] = rets; - /* prepare_ftrace_return(unsigned long *parent, unsigned long self_addr) */ - r0 = sp; - r1 = rets; + /* prepare_ftrace_return(parent, self_addr, frame_pointer) */ + r0 = sp; /* unsigned long *parent */ + r1 = rets; /* unsigned long self_addr */ +#ifdef CONFIG_HAVE_FUNCTION_GRAPH_FP_TEST + r2 = fp; /* unsigned long frame_pointer */ +#endif r0 += 16; /* skip the 4 local regs on stack */ r1 += -MCOUNT_INSN_SIZE; call _prepare_ftrace_return; @@ -136,6 +139,9 @@ ENTRY(_return_to_handler) [--sp] = r1; /* get original return address */ +#ifdef CONFIG_HAVE_FUNCTION_GRAPH_FP_TEST + r0 = fp; /* Blackfin is sane, so omit this */ +#endif call _ftrace_return_to_handler; rets = r0; diff --git a/arch/blackfin/kernel/ftrace.c b/arch/blackfin/kernel/ftrace.c index f2c85ac6f2da..a61d948ea925 100644 --- a/arch/blackfin/kernel/ftrace.c +++ b/arch/blackfin/kernel/ftrace.c @@ -16,7 +16,8 @@ * Hook the return address and push it in the stack of return addrs * in current thread info. */ -void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr) +void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr, + unsigned long frame_pointer) { struct ftrace_graph_ent trace; unsigned long return_hooker = (unsigned long)&return_to_handler; @@ -24,7 +25,8 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr) if (unlikely(atomic_read(¤t->tracing_graph_pause))) return; - if (ftrace_push_return_trace(*parent, self_addr, &trace.depth, 0) == -EBUSY) + if (ftrace_push_return_trace(*parent, self_addr, &trace.depth, + frame_pointer) == -EBUSY) return; trace.func = self_addr; |
