[MIPS64] libc/libm support
libc/libm support for MIPS64 targets
Change-Id: I8271941d418612a286be55495f0e95822f90004f
Signed-off-by: Chris Dearman <chris.dearman@imgtec.com>
Signed-off-by: Raghu Gandham <raghu.gandham@imgtec.com>
diff --git a/libc/arch-mips64/bionic/__bionic_clone.S b/libc/arch-mips64/bionic/__bionic_clone.S
new file mode 100644
index 0000000..2a9a2b0
--- /dev/null
+++ b/libc/arch-mips64/bionic/__bionic_clone.S
@@ -0,0 +1,99 @@
+/*
+ * 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 <machine/asm.h>
+#include <asm/unistd.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+
+#if (_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32)
+FRAMESZ = MKFSIZ(NARGSAVE,0)
+FRAME_ARG = 0*REGSZ
+FRAME_FN = 1*REGSZ
+#else
+FRAMESZ = MKFSIZ(0,3)
+FRAME_GP = FRAMESZ-1*REGSZ
+FRAME_ARG = FRAMESZ-2*REGSZ
+FRAME_FN = FRAMESZ-3*REGSZ
+#endif
+
+// pid_t __bionic_clone(int flags, void* child_stack, pid_t* parent_tid, void* tls, pid_t* child_tid, int (*fn)(void*), void* arg);
+ .text
+LEAF(__bionic_clone,FRAMESZ)
+ PTR_SUBU sp, FRAMESZ # allocate stack frame
+ SETUP_GP64(FRAME_GP,__bionic_clone)
+ SAVE_GP(FRAME_GP)
+
+ # set up child stack
+ PTR_SUBU a1,FRAMESZ
+#if (_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32)
+ PTR_L t0,FRAMESZ+5*REGSZ(sp) # fn
+ PRL_L t1,FRAMESZ+6*REGSZ(sp) # arg
+ PTR_S t0,FRAME_FN(a1) # fn
+ PTR_S t1,FRAME_ARG(a1) # arg
+#else
+ PTR_L t0,FRAME_GP(sp) # copy gp to child stack
+ PTR_S t0,FRAME_GP(a1)
+ PTR_S a5,FRAME_FN(a1) # fn
+ PTR_S a6,FRAME_ARG(a1) # arg
+# endif
+
+ # remainder of arguments are correct for clone system call
+ LI v0,__NR_clone
+ syscall
+
+ move a0,v0
+ bnez a3,.L__error_bc
+
+ beqz v0,.L__thread_start_bc
+
+ RESTORE_GP64
+ PTR_ADDU sp,FRAMESZ
+ j ra
+
+.L__thread_start_bc:
+ # void __bionic_clone_entry(int (*func)(void*), void *arg)
+ PTR_L a0,FRAME_FN(sp) # fn
+ PTR_L a1,FRAME_ARG(sp) # arg
+ LA t9,__bionic_clone_entry
+ RESTORE_GP64
+ /*
+ * For O32 etc the child stack must have space for a0..a3 to be stored
+ * For N64 etc, the child stack can be restored to the original value
+ */
+#if !((_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32))
+ PTR_ADDU sp,FRAMESZ
+#endif
+ j t9
+
+.L__error_bc:
+ LA t9,__set_errno
+ RESTORE_GP64
+ PTR_ADDU sp,FRAMESZ
+ j t9
+ END(__bionic_clone)