diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/mips/clone.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/mips/clone.S | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/sysdeps/unix/sysv/linux/mips/clone.S b/sysdeps/unix/sysv/linux/mips/clone.S deleted file mode 100644 index f521df1771..0000000000 --- a/sysdeps/unix/sysv/linux/mips/clone.S +++ /dev/null @@ -1,166 +0,0 @@ -/* Copyright (C) 1996, 1997, 2000, 2003, 2005 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ralf Baechle <ralf@linux-mips.org>, 1996. - - 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. */ - -/* clone() is even more special than fork() as it mucks with stacks - and invokes a function in the right context after its all over. */ - -#include <sys/asm.h> -#include <sysdep.h> -#define _ERRNO_H 1 -#include <bits/errno.h> -#ifdef RESET_PID -#include <tls.h> -#endif - -#define CLONE_VM 0x00000100 -#define CLONE_THREAD 0x00010000 - -/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg, - void *parent_tidptr, void *tls, void *child_tidptr) */ - - .text -#if _MIPS_SIM == _ABIO32 -# define EXTRA_LOCALS 1 -#else -# define EXTRA_LOCALS 0 -#endif -LOCALSZ= 4 -FRAMESZ= (((NARGSAVE+LOCALSZ)*SZREG)+ALSZ)&ALMASK -GPOFF= FRAMESZ-(1*SZREG) -NESTED(__clone,4*SZREG,sp) -#ifdef __PIC__ - SETUP_GP -#endif - PTR_SUBU sp, FRAMESZ - SETUP_GP64 (GPOFF, __clone) -#ifdef __PIC__ - SAVE_GP (GPOFF) -#endif -#ifdef PROF - .set noat - move $1,ra - jal _mcount - .set at -#endif - - - /* Sanity check arguments. */ - li v0,EINVAL - beqz a0,L(error) /* No NULL function pointers. */ - beqz a1,L(error) /* No NULL stack pointers. */ - - PTR_SUBU a1,32 /* Reserve argument save space. */ - PTR_S a0,0(a1) /* Save function pointer. */ - PTR_S a3,PTRSIZE(a1) /* Save argument pointer. */ -#ifdef RESET_PID - LONG_S a2,(PTRSIZE*2)(a1) /* Save clone flags. */ -#endif - - move a0,a2 - - /* Shuffle in the last three arguments - arguments 5, 6, and 7 to - this function, but arguments 3, 4, and 5 to the syscall. */ -#if _MIPS_SIM == _ABIO32 - PTR_L a2,(FRAMESZ+PTRSIZE+PTRSIZE+16)(sp) - PTR_S a2,16(sp) - PTR_L a2,(FRAMESZ+16)(sp) - PTR_L a3,(FRAMESZ+PTRSIZE+16)(sp) -#else - move a2,a4 - move a3,a5 - move a4,a6 -#endif - - /* Do the system call */ - li v0,__NR_clone - syscall - - bnez a3,L(error) - beqz v0,L(thread_start) - - /* Successful return from the parent */ - RESTORE_GP64 - PTR_ADDU sp, FRAMESZ - ret - - /* Something bad happened -- no child created */ -L(error): -#ifdef __PIC__ - PTR_LA t9,__syscall_error - RESTORE_GP64 - PTR_ADDU sp, FRAMESZ - jr t9 -#else - RESTORE_GP64 - PTR_ADDU sp, FRAMESZ - j __syscall_error -#endif - END(__clone) - -/* Load up the arguments to the function. Put this block of code in - its own function so that we can terminate the stack trace with our - debug info. */ - -ENTRY(__thread_start) -L(thread_start): - /* cp is already loaded. */ - SAVE_GP (GPOFF) - /* The stackframe has been created on entry of clone(). */ - -#ifdef RESET_PID - /* Check and see if we need to reset the PID. */ - LONG_L a0,(PTRSIZE*2)(sp) - and a1,a0,CLONE_THREAD - beqz a1,L(restore_pid) -L(donepid): -#endif - - /* Restore the arg for user's function. */ - PTR_L t9,0(sp) /* Function pointer. */ - PTR_L a0,PTRSIZE(sp) /* Argument pointer. */ - - /* Call the user's function. */ - jal t9 - - /* Call _exit rather than doing it inline for breakpoint purposes. */ - move a0,v0 -#ifdef __PIC__ - PTR_LA t9,_exit - jalr t9 -#else - jal _exit -#endif - -#ifdef RESET_PID -L(restore_pid): - and a1,a0,CLONE_VM - li v0,-1 - bnez a1,L(gotpid) - li v0,__NR_getpid - syscall -L(gotpid): - READ_THREAD_POINTER(v1) - INT_S v0,PID_OFFSET(v1) - INT_S v0,TID_OFFSET(v1) - b L(donepid) -#endif - - END(__thread_start) - -weak_alias (__clone, clone) |