| /* |
| * 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 <private/bionic_asm.h> |
| #include <linux/errno.h> |
| #include <linux/sched.h> |
| |
| #if (_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32) |
| FRAMESZ = MKFSIZ(NARGSAVE,0) |
| FRAME_ARG = 0*REGSZ |
| FRAME_FN = 1*REGSZ |
| #else |
| FRAMESZ = MKFSIZ(0,3) |
| FRAME_GP = FRAMESZ-1*REGSZ |
| FRAME_ARG = FRAMESZ-2*REGSZ |
| FRAME_FN = FRAMESZ-3*REGSZ |
| #endif |
| |
| // pid_t __bionic_clone(int flags, void* child_stack, pid_t* parent_tid, void* tls, pid_t* child_tid, int (*fn)(void*), void* arg); |
| LEAF(__bionic_clone, FRAMESZ) |
| PTR_SUBU sp, FRAMESZ # allocate stack frame |
| SETUP_GP64(FRAME_GP,__bionic_clone) |
| SAVE_GP(FRAME_GP) |
| |
| # set up child stack |
| PTR_SUBU a1,FRAMESZ |
| #if (_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32) |
| PTR_L t0,FRAMESZ+5*REGSZ(sp) # fn |
| PRL_L t1,FRAMESZ+6*REGSZ(sp) # arg |
| PTR_S t0,FRAME_FN(a1) # fn |
| PTR_S t1,FRAME_ARG(a1) # arg |
| #else |
| PTR_L t0,FRAME_GP(sp) # copy gp to child stack |
| PTR_S t0,FRAME_GP(a1) |
| PTR_S a5,FRAME_FN(a1) # fn |
| PTR_S a6,FRAME_ARG(a1) # arg |
| # endif |
| |
| # remainder of arguments are correct for clone system call |
| LI v0,__NR_clone |
| syscall |
| |
| move a0,v0 |
| bnez a3,.L__error_bc |
| |
| beqz v0,.L__thread_start_bc |
| |
| RESTORE_GP64 |
| PTR_ADDU sp,FRAMESZ |
| j ra |
| |
| .L__thread_start_bc: |
| # Clear return address in child so we don't unwind further. |
| li ra,0 |
| |
| # void __start_thread(int (*func)(void*), void *arg) |
| PTR_L a0,FRAME_FN(sp) # fn |
| PTR_L a1,FRAME_ARG(sp) # arg |
| LA t9,__start_thread |
| RESTORE_GP64 |
| /* |
| * For O32 etc the child stack must have space for a0..a3 to be stored |
| * For N64 etc, the child stack can be restored to the original value |
| */ |
| #if !((_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32)) |
| PTR_ADDU sp,FRAMESZ |
| #endif |
| j t9 |
| |
| .L__error_bc: |
| LA t9,__set_errno_internal |
| RESTORE_GP64 |
| PTR_ADDU sp,FRAMESZ |
| j t9 |
| END(__bionic_clone) |
| .hidden __bionic_clone |