Revert "Lose the hand-written futex assembler."

This reverts commit ced906c849704f379d7191822f6d74993d4fa296.

Causes issues on art / dalvik due to a broken return value
check and other undiagnosed issues.

bug: 15195455

Change-Id: I5d6bbb389ecefb0e33a5237421a9d56d32a9317c

3 files changed, 90 insertions, 0 deletions

diff --git a/libc/arch-mips64/bionic/futex_mips.S b/libc/arch-mips64/bionic/futex_mips.S
new file mode 100644
index 0000000..60c218c
--- /dev/null
+++ b/libc/arch-mips64/bionic/futex_mips.S
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * 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 OWNER 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 <private/bionic_asm.h>
+
+#if (_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32)
+FRAMESZ		=	MKFSIZ(NARGSAVE+2,0)
+FRAME_A4	=	4*REGSZ
+FRAME_A5	=	5*REGSZ
+#else
+FRAMESZ		=	0
+#endif
+
+// int __futex_syscall4(volatile void* ftx, int op, int val, const struct timespec* timeout)
+LEAF(__futex_syscall4,FRAMESZ)
+#if (_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32)
+	PTR_SUBU sp, FRAMESZ
+	REG_S	$0,FRAME_A5(sp)	/* val3 */
+	REG_S	$0,FRAME_A4(sp)	/* addr2 */
+#else
+	move	a5,$0		/* val3 */
+	move	a4,$0		/* addr2 */
+#endif
+#	move	a3,a3		/* timespec */
+#	move	a2,a2		/* val */
+#	move	a1,a1		/* op */
+#	move	a0,a0		/* ftx */
+	LI	v0,__NR_futex
+	syscall
+	neg	v0		/* Negate errno */
+	bnez	a3,1f		/* Check for error */
+	move	v0,$0		/* Return 0 if no error */
+1:
+#if (_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32)
+	PTR_ADDU sp,FRAMESZ
+#endif
+	j	ra
+	END(__futex_syscall4)
+.hidden __futex_syscall4
diff --git a/libc/arch-mips64/mips64.mk b/libc/arch-mips64/mips64.mk
index 26390a6..b6e0209 100644
--- a/libc/arch-mips64/mips64.mk
+++ b/libc/arch-mips64/mips64.mk
@@ -43,6 +43,7 @@ libc_bionic_src_files_mips64 := \
     arch-mips64/bionic/__bionic_clone.S \
     arch-mips64/bionic/bzero.S \
     arch-mips64/bionic/_exit_with_stack_teardown.S \
+    arch-mips64/bionic/futex_mips.S \
     arch-mips64/bionic/__get_sp.S \
     arch-mips64/bionic/getdents.cpp \
     arch-mips64/bionic/memcmp16.S \
diff --git a/libc/arch-mips64/syscalls/futex.S b/libc/arch-mips64/syscalls/futex.S
new file mode 100644
index 0000000..dc7dcc6
--- /dev/null
+++ b/libc/arch-mips64/syscalls/futex.S
@@ -0,0 +1,25 @@
+/* Generated by gensyscalls.py. Do not edit. */
+
+#include <private/bionic_asm.h>
+
+ENTRY(futex)
+    .set push
+    .set noreorder
+    li v0, __NR_futex
+    syscall
+    bnez a3, 1f
+    move a0, v0
+    j ra
+    nop
+1:
+    move t0, ra
+    bal     2f
+    nop
+2:
+    .cpsetup ra, t1, 2b
+    LA t9,__set_errno
+    .cpreturn
+    j t9
+    move ra, t0
+    .set pop
+END(futex)