diff options
Diffstat (limited to 'linuxthreads/sysdeps/unix/sysv/linux')
-rw-r--r-- | linuxthreads/sysdeps/unix/sysv/linux/mips/vfork.S | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/linuxthreads/sysdeps/unix/sysv/linux/mips/vfork.S b/linuxthreads/sysdeps/unix/sysv/linux/mips/vfork.S new file mode 100644 index 0000000000..bf541439b5 --- /dev/null +++ b/linuxthreads/sysdeps/unix/sysv/linux/mips/vfork.S @@ -0,0 +1,104 @@ +/* Copyright (C) 2005 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +/* vfork() is just a special case of clone(). */ + +#include <sys/asm.h> +#include <sysdep.h> +#include <asm/unistd.h> + +/* int vfork() */ + + .text +LOCALSZ= 1 +FRAMESZ= (((NARGSAVE+LOCALSZ)*SZREG)+ALSZ)&ALMASK +GPOFF= FRAMESZ-(1*SZREG) +NESTED(__vfork,FRAMESZ,sp) +#ifdef __PIC__ + SETUP_GP +#endif + PTR_SUBU sp, FRAMESZ + SETUP_GP64 (a5, __vfork) +#ifdef __PIC__ + SAVE_GP (GPOFF) +#endif +#ifdef PROF +# if (_MIPS_SIM != _ABIO32) + PTR_S a5, GPOFF(sp) +# endif + .set noat + move $1, ra +# if (_MIPS_SIM == _ABIO32) + subu sp,sp,8 +# endif + jal _mcount + .set at +# if (_MIPS_SIM != _ABIO32) + PTR_L a5, GPOFF(sp) +# endif +#endif + + /* If libpthread is loaded, we need to call fork instead. */ +#ifdef SHARED + PTR_L a0, __libc_pthread_functions +#else + .weak pthread_create + PTR_LA a0, pthread_create +#endif + + PTR_ADDU sp, FRAMESZ + + bnez a0, L(call_fork) + + li a0, 0x4112 /* CLONE_VM | CLONE_VFORK | SIGCHLD */ + move a1, sp + + /* Do the system call */ + li v0,__NR_clone + syscall + + bnez a3,L(error) + + /* Successful return from the parent or child. */ + RESTORE_GP64 + ret + + /* Something bad happened -- no child created. */ +L(error): +#ifdef __PIC__ + PTR_LA t9, __syscall_error + RESTORE_GP64 + jr t9 +#else + RESTORE_GP64 + j __syscall_error +#endif + +L(call_fork): +#ifdef __PIC__ + PTR_LA t9, fork + RESTORE_GP64 + jr t9 +#else + RESTORE_GP64 + j fork +#endif + END(__vfork) + +libc_hidden_def(__vfork) +weak_alias(__vfork, vfork) |