97cf7f3394
Only provide an implementation for ARM at the moment, since it requires specific assembly fragments (the standard syscall stubs cannot be used because the child returns in a different stack).
79 lines
No EOL
2.4 KiB
ArmAsm
79 lines
No EOL
2.4 KiB
ArmAsm
/*
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* Copyright (C) 2009 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 <sys/linux-syscalls.h>
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.text
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.type __pthread_clone, @function
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.globl __pthread_clone
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.align 4
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__pthread_clone:
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/* insert the args onto the new stack */
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mov r5, r0
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mov.l r4, @-r0 /* func */
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mov.l r7, @-r0 /* arg */
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/* do the system call */
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mov r6, r4 /* Set clone_flags. new sp is ready in r5. */
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mov.l 0f, r3
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trapa #(4 + 0x10)
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/* check error */
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cmp/pz r0
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bf __error
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/* check if parent or child */
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cmp/pl r0
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bt __return
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/* prepare args for __thread_entry */
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mov #8, r1
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sub r1, r15 /* -8 */
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mov.l @r15+, r5 /* +4 */ /* arg */
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mov.l @r15+, r4 /* +4 */ /* func */
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mov r15, r6 /* tls */
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/* jump to __thread_entry */
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mov.l 1f, r0
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jmp @r0
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nop
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__error:
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mov #-1, r0
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__return:
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rts
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nop
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.align 2
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0: .long __NR_clone
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1: .long __thread_entry
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/* XXX: TODO: Add __bionic_clone here
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* See bionic/bionic_clone.c and arch-arm/bionic/clone.S
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* for more details...
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*/ |