1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <private/bionic_asm.h> 30 #include <linux/errno.h> 31 #include <linux/sched.h> 32 33 #if (_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32) 34 FRAMESZ = MKFSIZ(NARGSAVE,0) 35 FRAME_ARG = 0*REGSZ 36 FRAME_FN = 1*REGSZ 37 #else 38 FRAMESZ = MKFSIZ(0,3) 39 FRAME_GP = FRAMESZ-1*REGSZ 40 FRAME_ARG = FRAMESZ-2*REGSZ 41 FRAME_FN = FRAMESZ-3*REGSZ 42 #endif 43 44 // pid_t __bionic_clone(int flags, void* child_stack, pid_t* parent_tid, void* tls, pid_t* child_tid, int (*fn)(void*), void* arg); 45 LEAF(__bionic_clone, FRAMESZ) 46 PTR_SUBU sp, FRAMESZ # allocate stack frame 47 SETUP_GP64(FRAME_GP,__bionic_clone) 48 SAVE_GP(FRAME_GP) 49 50 # set up child stack 51 PTR_SUBU a1,FRAMESZ 52 #if (_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32) 53 PTR_L t0,FRAMESZ+5*REGSZ(sp) # fn 54 PRL_L t1,FRAMESZ+6*REGSZ(sp) # arg 55 PTR_S t0,FRAME_FN(a1) # fn 56 PTR_S t1,FRAME_ARG(a1) # arg 57 #else 58 PTR_L t0,FRAME_GP(sp) # copy gp to child stack 59 PTR_S t0,FRAME_GP(a1) 60 PTR_S a5,FRAME_FN(a1) # fn 61 PTR_S a6,FRAME_ARG(a1) # arg 62 # endif 63 64 # remainder of arguments are correct for clone system call 65 LI v0,__NR_clone 66 syscall 67 68 move a0,v0 69 bnez a3,.L__error_bc 70 71 beqz v0,.L__thread_start_bc 72 73 RESTORE_GP64 74 PTR_ADDU sp,FRAMESZ 75 j ra 76 77 .L__thread_start_bc: 78 # Clear return address in child so we don't unwind further. 79 li ra,0 80 81 # void __start_thread(int (*func)(void*), void *arg) 82 PTR_L a0,FRAME_FN(sp) # fn 83 PTR_L a1,FRAME_ARG(sp) # arg 84 LA t9,__start_thread 85 RESTORE_GP64 86 /* 87 * For O32 etc the child stack must have space for a0..a3 to be stored 88 * For N64 etc, the child stack can be restored to the original value 89 */ 90 #if !((_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32)) 91 PTR_ADDU sp,FRAMESZ 92 #endif 93 j t9 94 95 .L__error_bc: 96 LA t9,__set_errno_internal 97 RESTORE_GP64 98 PTR_ADDU sp,FRAMESZ 99 j t9 100 END(__bionic_clone) 101 .hidden __bionic_clone 102
