| 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950 |
- /*
- * 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)
|
