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gerrit.omnirom.org / android_bionic / f15a00b1ecc285dcf433fd38a9f05e4fe0030d85 / . / libc / arch-mips64 / bionic / vfork.S
blob: b5ff5d41334ee731f717118c53a3babdec0c9047 [file] [log] [blame]
Serban Constantinescue2104882013-09-26 11:37:10 +0100[diff] [blame]1/*
Dan Albert6a918872014-08-05 20:53:31 +0000[diff] [blame]2 * Copyright (C) 2008 The Android Open Source Project
Elliott Hughes54a74942014-01-03 16:40:37 -0800[diff] [blame]3 * All rights reserved.
Serban Constantinescue2104882013-09-26 11:37:10 +0100[diff] [blame]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
Dan Albert6a918872014-08-05 20:53:31 +0000[diff] [blame]29#include <private/bionic_asm.h>
30#include <linux/sched.h>
Serban Constantinescue2104882013-09-26 11:37:10 +0100[diff] [blame]31
Dan Albert6a918872014-08-05 20:53:31 +0000[diff] [blame]32// TODO: mips' uapi signal.h is missing #ifndef __ASSEMBLY__.
33// #include <asm/signal.h>
34#define SIGCHLD 18
35
36 .text
37
38#if (_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32)
39FRAMESZ = MKFSIZ(5,0)
40#else
41FRAMESZ = MKFSIZ(0,0)
42#endif
43
44LEAF(vfork,FRAMESZ)
dimitryfa432522017-10-25 13:07:45 +0200[diff] [blame]45__BIONIC_WEAK_ASM_FOR_NATIVE_BRIDGE(vfork)
Dan Albert6a918872014-08-05 20:53:31 +0000[diff] [blame]46#if FRAMESZ!=0
Elliott Hughesab413c52017-10-13 13:22:24 -0700[diff] [blame]47 PTR_SUBU $sp, FRAMESZ
Dan Albert6a918872014-08-05 20:53:31 +0000[diff] [blame]48#endif
Elliott Hughesab413c52017-10-13 13:22:24 -0700[diff] [blame]49 SETUP_GP64($a5, vfork)
Duane Sand61d9ae52015-08-11 17:00:56 -0700[diff] [blame]50
51 // __get_tls()[TLS_SLOT_THREAD_ID]->cached_pid_ = 0
Elliott Hughesab413c52017-10-13 13:22:24 -0700[diff] [blame]52 rdhwr $v0, $29 // v0 = tls
53 REG_L $v0, REGSZ*1($v0) // v0 = v0[TLS_SLOT_THREAD_ID ie 1]
54 sw $0, REGSZ*2+4($v0) // v0->cached_pid_ = 0
Duane Sand61d9ae52015-08-11 17:00:56 -0700[diff] [blame]55
Elliott Hughesab413c52017-10-13 13:22:24 -0700[diff] [blame]56 LI $a0, (CLONE_VM | CLONE_VFORK | SIGCHLD)
57 move $a1, $0
58 move $a2, $0
59 move $a3, $0
Dan Albert6a918872014-08-05 20:53:31 +0000[diff] [blame]60#if (_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32)
61 REG_S $0, 4*REGSZ(sp)
62#else
Elliott Hughesab413c52017-10-13 13:22:24 -0700[diff] [blame]63 move $a4, $0
Dan Albert6a918872014-08-05 20:53:31 +0000[diff] [blame]64#endif
Elliott Hughesab413c52017-10-13 13:22:24 -0700[diff] [blame]65 LI $v0, __NR_clone
Dan Albert6a918872014-08-05 20:53:31 +0000[diff] [blame]66 syscall
67#if FRAMESZ!=0
Elliott Hughesab413c52017-10-13 13:22:24 -0700[diff] [blame]68 PTR_ADDU $sp,FRAMESZ
Dan Albert6a918872014-08-05 20:53:31 +0000[diff] [blame]69#endif
Elliott Hughesab413c52017-10-13 13:22:24 -0700[diff] [blame]70 move $a0, $v0
71 bnez $a3, 1f
Dan Albert6a918872014-08-05 20:53:31 +0000[diff] [blame]72 RESTORE_GP64
Elliott Hughesab413c52017-10-13 13:22:24 -0700[diff] [blame]73 j $ra
Dan Albert6a918872014-08-05 20:53:31 +0000[diff] [blame]741:
Elliott Hughesab413c52017-10-13 13:22:24 -0700[diff] [blame]75 LA $t9,__set_errno_internal
Dan Albert6a918872014-08-05 20:53:31 +0000[diff] [blame]76 RESTORE_GP64
Elliott Hughesab413c52017-10-13 13:22:24 -0700[diff] [blame]77 j $t9
Dan Albert6a918872014-08-05 20:53:31 +0000[diff] [blame]78 END(vfork)