mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-30 10:45:40 +03:00
137 lines
4.2 KiB
C
137 lines
4.2 KiB
C
/* Cancellable system call stubs. Linux/PowerPC version.
|
|
Copyright (C) 2003, 2004, 2005, 2006 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); \
|
|
CGOTSETUP; \
|
|
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); \
|
|
CGOTRESTORE; \
|
|
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
|
|
|
|
# define CGOTSETUP
|
|
# define CGOTRESTORE
|
|
|
|
# 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 JUMPTARGET(__librt_enable_asynccancel)
|
|
# define CDISABLE bl JUMPTARGET(__librt_disable_asynccancel)
|
|
# if defined HAVE_AS_REL16 && defined PIC
|
|
# undef CGOTSETUP
|
|
# define CGOTSETUP \
|
|
bcl 20,31,1f; \
|
|
1: stw 30,44(1); \
|
|
mflr 30; \
|
|
addis 30,30,_GLOBAL_OFFSET_TABLE-1b@ha; \
|
|
addi 30,30,_GLOBAL_OFFSET_TABLE-1b@l
|
|
# undef CGOTRESTORE
|
|
# define CGOTRESTORE \
|
|
lwz 30,44(1)
|
|
# endif
|
|
# 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
|