diff options
Diffstat (limited to 'libc/arch-arm/bionic/clone.S')
-rw-r--r-- | libc/arch-arm/bionic/clone.S | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/libc/arch-arm/bionic/clone.S b/libc/arch-arm/bionic/clone.S new file mode 100644 index 0000000..791c73d --- /dev/null +++ b/libc/arch-arm/bionic/clone.S @@ -0,0 +1,74 @@ +/* + * 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 <sys/linux-syscalls.h> + + .text + .type __pthread_clone, #function + .global __pthread_clone + .align 4 + +__pthread_clone: + @ insert the args onto the new stack + str r0, [r1, #-4] + str r3, [r1, #-8] + + @ do the system call + @ get flags + + mov r0, r2 + + @ new sp is already in r1 + +#if __ARM_EABI__ + stmfd sp!, {r4, r7} + ldr r7, =__NR_clone + swi #0 +#else + swi #__NR_clone +#endif + + movs r0, r0 +#if __ARM_EABI__ + ldmnefd sp!, {r4, r7} +#endif + blt __error + bxne lr + + + @ pick the function arg and call address off the stack and jump + @ to the C __thread_entry function which does some setup and then + @ calls the thread's start function + + ldr r0, [sp, #-4] + ldr r1, [sp, #-8] + mov r2, sp @ __thread_entry needs the TLS pointer + b __thread_entry + +__error: + mov r0, #-1 + bx lr |