e7dccdf683
The unwinder will end up on the parent thread's stack if the return address register is not cleared. Bug: 14270816 Bug: 15195760 Change-Id: Iebcdf5cc881cad245643bb193760de35eb7f8b19
73 lines
2.3 KiB
ArmAsm
73 lines
2.3 KiB
ArmAsm
/*
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* Copyright (C) 2008 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <private/bionic_asm.h>
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#include <linux/errno.h>
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#include <linux/sched.h>
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// pid_t __bionic_clone(int flags, void* child_stack, pid_t* parent_tid, void* tls, pid_t* child_tid, int (*fn)(void*), void* arg);
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ENTRY(__bionic_clone)
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.set noreorder
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.cpload t9
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.set reorder
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# set up child stack
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subu a1,16
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lw t0,20(sp) # fn
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lw t1,24(sp) # arg
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sw t0,0(a1) # fn
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sw t1,4(a1) # arg
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# remainder of arguments are correct for clone system call
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li v0,__NR_clone
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syscall
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bnez a3,.L__error_bc
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beqz v0,.L__thread_start_bc
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j ra
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.L__thread_start_bc:
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# Clear return address in child so we don't unwind further.
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li ra,0
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lw a0,0(sp) # fn
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lw a1,4(sp) # arg
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# void __bionic_clone_entry(int (*func)(void*), void *arg)
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la t9,__bionic_clone_entry
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j t9
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.L__error_bc:
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move a0,v0
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la t9,__set_errno
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j t9
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END(__bionic_clone)
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.hidden __bionic_clone
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