Adding upstream version 1.16.10.upstream/1.16.10upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 75 insertions, 0 deletions

diff --git a/src/runtime/cgo/gcc_mipsx.S b/src/runtime/cgo/gcc_mipsx.S
new file mode 100644
index 0000000..54f4b82
--- /dev/null
+++ b/src/runtime/cgo/gcc_mipsx.S
@@ -0,0 +1,75 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build mips mipsle
+
+/*
+ * void crosscall1(void (*fn)(void), void (*setg_gcc)(void *g), void *g)
+ *
+ * Calling into the gc tool chain, where all registers are caller save.
+ * Called from standard MIPS O32 ABI, where $16-$23, $30, and $f20-$f31
+ * are callee-save, so they must be saved explicitly, along with $31 (LR).
+ */
+.globl crosscall1
+.set noat
+crosscall1:
+#ifndef __mips_soft_float
+	addiu	$29, $29, -88
+#else
+	addiu	$29, $29, -40 // For soft-float, no need to make room for FP registers
+#endif
+	sw	$31, 0($29)
+	sw	$16, 4($29)
+	sw	$17, 8($29)
+	sw	$18, 12($29)
+	sw	$19, 16($29)
+	sw	$20, 20($29)
+	sw	$21, 24($29)
+	sw	$22, 28($29)
+	sw	$23, 32($29)
+	sw	$30, 36($29)
+
+#ifndef __mips_soft_float
+	sdc1	$f20, 40($29)
+	sdc1	$f22, 48($29)
+	sdc1	$f24, 56($29)
+	sdc1	$f26, 64($29)
+	sdc1	$f28, 72($29)
+	sdc1	$f30, 80($29)
+#endif
+	move	$20, $4 // save R4
+	move	$4, $6
+	jalr	$5	// call setg_gcc
+	jalr	$20	// call fn
+
+	lw	$16, 4($29)
+	lw	$17, 8($29)
+	lw	$18, 12($29)
+	lw	$19, 16($29)
+	lw	$20, 20($29)
+	lw	$21, 24($29)
+	lw	$22, 28($29)
+	lw	$23, 32($29)
+	lw	$30, 36($29)
+#ifndef __mips_soft_float
+	ldc1	$f20, 40($29)
+	ldc1	$f22, 48($29)
+	ldc1	$f24, 56($29)
+	ldc1	$f26, 64($29)
+	ldc1	$f28, 72($29)
+	ldc1	$f30, 80($29)
+#endif
+	lw	$31, 0($29)
+#ifndef __mips_soft_float
+	addiu	$29, $29, 88
+#else
+	addiu	$29, $29, 40
+#endif
+	jr	$31
+
+.set at
+
+#ifdef __ELF__
+.section .note.GNU-stack,"",%progbits
+#endif