1 files changed, 77 insertions, 0 deletions
diff --git a/lib/libutee/arch/arm/gprof/gprof_a64.S b/lib/libutee/arch/arm/gprof/gprof_a64.S
new file mode 100644
index 0000000..fd3b987
--- /dev/null
+++ b/lib/libutee/arch/arm/gprof/gprof_a64.S
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2016, Linaro Limited
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <asm.S>
+
+#ifdef CFG_TA_GPROF_SUPPORT
+
+
+/*
+ * Convert return address to call site address by subtracting the size of one
+ * instruction.
+ */
+.macro adjust_pc rd, rn
+	sub	\rd, \rn, #4
+.endm
+
+/*
+ * void __utee_mcount(void *return_address)
+ * @return_address: return address to instrumented function
+ *
+ * With the -pg option, the compiler inserts a call to _mcount into
+ * every function prologue.
+ * x0 contains the value of lr (x30) before the call, that is the return
+ * address to the caller of the instrumented function. The callee, i.e. the
+ * instrumented function itself, is determined from the current value of x30.
+ * Then we call:
+ *   void __mcount_internal(void *frompc, void *selfpc);
+ *
+ * _mcount is defined and set to the value of this function by the linker
+ * script if the TA is instrumented, i.e., if _mcount is referenced
+ */
+FUNC __utee_mcount, :
+	stp		x29, x30, [sp, #-16]!
+	mov		x29, sp
+	adjust_pc	x0, x0
+	adjust_pc	x1, x30
+	bl		__mcount_internal
+	ldp		x29, x30, [sp], #16
+	ret
+END_FUNC __utee_mcount
+
+#else /* !CFG_TA_GPROF_SUPPORT */
+
+/*
+ * The TA linker script always references __utee_mcount so provide a version
+ * that does nothing
+ */
+	.weak __utee_mcount
+FUNC __utee_mcount, :
+	ret
+END_FUNC __utee_mcount
+
+#endif /* CFG_TA_GPROF_SUPPORT */