1405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham/* 2405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham * Copyright (C) 2008 The Android Open Source Project 3405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham * All rights reserved. 4405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham * 5405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham * Redistribution and use in source and binary forms, with or without 6405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham * modification, are permitted provided that the following conditions 7405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham * are met: 8405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham * * Redistributions of source code must retain the above copyright 9405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham * notice, this list of conditions and the following disclaimer. 10405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham * * Redistributions in binary form must reproduce the above copyright 11405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham * notice, this list of conditions and the following disclaimer in 12405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham * the documentation and/or other materials provided with the 13405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham * distribution. 14405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham * 15405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham * SUCH DAMAGE. 27405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham */ 2856d161bb62225cea969b49c97ae732d1845e5304Elliott Hughes 29851e68a2402fa414544e66650e09dfdaac813e51Elliott Hughes#include <private/bionic_asm.h> 30405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham#include <linux/errno.h> 3156d161bb62225cea969b49c97ae732d1845e5304Elliott Hughes#include <linux/sched.h> 3240eabe24e4e3ae8ebe437f1f4e43cf39cbba2e9eElliott Hughes 3370b24b1cc2a1a4436b1fea3f8b76616fdcb27224Elliott Hughes// pid_t __bionic_clone(int flags, void* child_stack, pid_t* parent_tid, void* tls, pid_t* child_tid, int (*fn)(void*), void* arg); 34851e68a2402fa414544e66650e09dfdaac813e51Elliott HughesENTRY(__bionic_clone) 35405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham .set noreorder 36851e68a2402fa414544e66650e09dfdaac813e51Elliott Hughes .cpload t9 37405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham .set reorder 38405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham 39405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham # set up child stack 40851e68a2402fa414544e66650e09dfdaac813e51Elliott Hughes subu a1,16 41851e68a2402fa414544e66650e09dfdaac813e51Elliott Hughes lw t0,20(sp) # fn 42851e68a2402fa414544e66650e09dfdaac813e51Elliott Hughes lw t1,24(sp) # arg 43851e68a2402fa414544e66650e09dfdaac813e51Elliott Hughes sw t0,0(a1) # fn 44851e68a2402fa414544e66650e09dfdaac813e51Elliott Hughes sw t1,4(a1) # arg 45405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham 46405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham # remainder of arguments are correct for clone system call 47851e68a2402fa414544e66650e09dfdaac813e51Elliott Hughes li v0,__NR_clone 48405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham syscall 49405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham 50851e68a2402fa414544e66650e09dfdaac813e51Elliott Hughes bnez a3,.L__error_bc 51405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham 52851e68a2402fa414544e66650e09dfdaac813e51Elliott Hughes beqz v0,.L__thread_start_bc 5340eabe24e4e3ae8ebe437f1f4e43cf39cbba2e9eElliott Hughes 54851e68a2402fa414544e66650e09dfdaac813e51Elliott Hughes j ra 55405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham 56405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham.L__thread_start_bc: 57e7dccdf683616347a8fa65aba02ee3e12babbcf4Elliott Hughes # Clear return address in child so we don't unwind further. 58e7dccdf683616347a8fa65aba02ee3e12babbcf4Elliott Hughes li ra,0 59e7dccdf683616347a8fa65aba02ee3e12babbcf4Elliott Hughes 60851e68a2402fa414544e66650e09dfdaac813e51Elliott Hughes lw a0,0(sp) # fn 61851e68a2402fa414544e66650e09dfdaac813e51Elliott Hughes lw a1,4(sp) # arg 62405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham 63ebc8cd117a562f387c52ed4e1aeba0fb21f33194Elliott Hughes # void __start_thread(int (*func)(void*), void *arg) 64ebc8cd117a562f387c52ed4e1aeba0fb21f33194Elliott Hughes la t9,__start_thread 65851e68a2402fa414544e66650e09dfdaac813e51Elliott Hughes j t9 66405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham 67405b8029a6888f386adf3512113a33546141d1c8Raghu Gandham.L__error_bc: 68851e68a2402fa414544e66650e09dfdaac813e51Elliott Hughes move a0,v0 697efad83d430f4d824f2aaa75edea5106f6ff8aaeElliott Hughes la t9,__set_errno_internal 70851e68a2402fa414544e66650e09dfdaac813e51Elliott Hughes j t9 71851e68a2402fa414544e66650e09dfdaac813e51Elliott HughesEND(__bionic_clone) 72954cf0d4e2669f91194b45f484152e47efa4f6c7Elliott Hughes.hidden __bionic_clone 73