diff options
| author | Jiri Kosina <jkosina@suse.cz> | 2013-07-25 12:30:27 +0200 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2013-07-25 12:30:49 +0200 |
| commit | a3f8612700507a10ad7186fd77e9f46c7af88335 (patch) | |
| tree | f00be0b726748113ffeb4e1caf7ade7ef33cfabe /arch/xtensa/kernel/mcount.S | |
| parent | 8ecada16512c90ae782b00f15ebff0c32e4cd92a (diff) | |
| parent | 07bc9dc1b01bad7084fed3d2659e5d83317869bc (diff) | |
Merge branch 'master' into for-next
Sync with Linus' master to be able to apply
trivial patche to newer code.
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'arch/xtensa/kernel/mcount.S')
| -rw-r--r-- | arch/xtensa/kernel/mcount.S | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/arch/xtensa/kernel/mcount.S b/arch/xtensa/kernel/mcount.S new file mode 100644 index 000000000000..0eeda2e4a25e --- /dev/null +++ b/arch/xtensa/kernel/mcount.S @@ -0,0 +1,50 @@ +/* + * arch/xtensa/kernel/mcount.S + * + * Xtensa specific mcount support + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2013 Tensilica Inc. + */ + +#include <linux/linkage.h> +#include <asm/ftrace.h> + +/* + * Entry condition: + * + * a2: a0 of the caller + */ + +ENTRY(_mcount) + + entry a1, 16 + + movi a4, ftrace_trace_function + l32i a4, a4, 0 + movi a3, ftrace_stub + bne a3, a4, 1f + retw + +1: xor a7, a2, a1 + movi a3, 0x3fffffff + and a7, a7, a3 + xor a7, a7, a1 + + xor a6, a0, a1 + and a6, a6, a3 + xor a6, a6, a1 + addi a6, a6, -MCOUNT_INSN_SIZE + callx4 a4 + + retw + +ENDPROC(_mcount) + +ENTRY(ftrace_stub) + entry a1, 16 + retw +ENDPROC(ftrace_stub) |