/* Cancellable system call stubs.  Linux/PowerPC version.   Copyright (C) 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.   This file is part of the GNU C Library.   Contributed by Franz Sirl <Franz.Sirl-kernel@lauterbach.com>, 2003.   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., 51 Franklin Street, Fifth Floor, Boston MA   02110-1301 USA.  */#include <sysdep.h>#include <tls.h>#ifndef __ASSEMBLER__# include <nptl/pthreadP.h>#endif#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt# undef PSEUDO# define PSEUDO(name, syscall_name, args)				\  .section ".text";							\  ENTRY (name)								\    SINGLE_THREAD_P;							\    bne- .Lpseudo_cancel;						\  .type __##syscall_name##_nocancel,@function;				\  .globl __##syscall_name##_nocancel;					\  __##syscall_name##_nocancel:						\    DO_CALL (SYS_ify (syscall_name));					\    PSEUDO_RET;								\  .size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel;	\  .Lpseudo_cancel:							\    stwu 1,-48(1);							\    cfi_adjust_cfa_offset (48);						\    mflr 9;								\    stw 9,52(1);							\    cfi_offset (lr, 4);							\    DOCARGS_##args;	/* save syscall args around CENABLE.  */	\    CENABLE;								\    stw 3,16(1);	/* store CENABLE return value (MASK).  */	\    UNDOCARGS_##args;	/* restore syscall args.  */			\    DO_CALL (SYS_ify (syscall_name));					\    mfcr 0;		/* save CR/R3 around CDISABLE.  */		\    stw 3,8(1);								\    stw 0,12(1);							\    lwz 3,16(1);	/* pass MASK to CDISABLE.  */			\    CDISABLE;								\    lwz 4,52(1);							\    lwz 0,12(1);	/* restore CR/R3. */				\    lwz 3,8(1);								\    mtlr 4;								\    mtcr 0;								\    addi 1,1,48;# define DOCARGS_0# define UNDOCARGS_0# define DOCARGS_1	stw 3,20(1); DOCARGS_0# define UNDOCARGS_1	lwz 3,20(1); UNDOCARGS_0# define DOCARGS_2	stw 4,24(1); DOCARGS_1# define UNDOCARGS_2	lwz 4,24(1); UNDOCARGS_1# define DOCARGS_3	stw 5,28(1); DOCARGS_2# define UNDOCARGS_3	lwz 5,28(1); UNDOCARGS_2# define DOCARGS_4	stw 6,32(1); DOCARGS_3# define UNDOCARGS_4	lwz 6,32(1); UNDOCARGS_3# define DOCARGS_5	stw 7,36(1); DOCARGS_4# define UNDOCARGS_5	lwz 7,36(1); UNDOCARGS_4# define DOCARGS_6	stw 8,40(1); DOCARGS_5# define UNDOCARGS_6	lwz 8,40(1); UNDOCARGS_5# ifdef IS_IN_libpthread#  define CENABLE	bl __pthread_enable_asynccancel@local#  define CDISABLE	bl __pthread_disable_asynccancel@local# elif !defined NOT_IN_libc#  define CENABLE	bl __libc_enable_asynccancel@local#  define CDISABLE	bl __libc_disable_asynccancel@local# elif defined IS_IN_librt#  define CENABLE	bl __librt_enable_asynccancel@local#  define CDISABLE	bl __librt_disable_asynccancel@local# else#  error Unsupported library# endif# ifndef __ASSEMBLER__#  define SINGLE_THREAD_P						\  __builtin_expect (THREAD_GETMEM (THREAD_SELF,				\				   header.multiple_threads) == 0, 1)# else#  define SINGLE_THREAD_P						\  lwz 10,MULTIPLE_THREADS_OFFSET(2);					\  cmpwi 10,0# endif#elif !defined __ASSEMBLER__# define SINGLE_THREAD_P (1)# define NO_CANCELLATION 1#endif#ifndef __ASSEMBLER__# define RTLD_SINGLE_THREAD_P \  __builtin_expect (THREAD_GETMEM (THREAD_SELF, \				   header.multiple_threads) == 0, 1)#endif