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glibc/nptl/sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep-cancel.h
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/* Cancellable system call stubs. Linux/PowerPC64 version. | |
Copyright (C) 2003, 2004, 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 | |
# ifdef HAVE_ASM_GLOBAL_DOT_NAME | |
# define DASHDASHPFX(str) .__##str | |
# else | |
# define DASHDASHPFX(str) __##str | |
# endif | |
# undef PSEUDO | |
# define PSEUDO(name, syscall_name, args) \ | |
.section ".text"; \ | |
ENTRY (name) \ | |
SINGLE_THREAD_P; \ | |
bne- .Lpseudo_cancel; \ | |
.type DASHDASHPFX(syscall_name##_nocancel),@function; \ | |
.globl DASHDASHPFX(syscall_name##_nocancel); \ | |
DASHDASHPFX(syscall_name##_nocancel): \ | |
DO_CALL (SYS_ify (syscall_name)); \ | |
PSEUDO_RET; \ | |
.size DASHDASHPFX(syscall_name##_nocancel),.-DASHDASHPFX(syscall_name##_nocancel); \ | |
.Lpseudo_cancel: \ | |
stdu 1,-128(1); \ | |
cfi_adjust_cfa_offset (128); \ | |
mflr 9; \ | |
std 9,128+16(1); \ | |
cfi_offset (lr, 16); \ | |
DOCARGS_##args; /* save syscall args around CENABLE. */ \ | |
CENABLE; \ | |
std 3,72(1); /* store CENABLE return value (MASK). */ \ | |
UNDOCARGS_##args; /* restore syscall args. */ \ | |
DO_CALL (SYS_ify (syscall_name)); \ | |
mfcr 0; /* save CR/R3 around CDISABLE. */ \ | |
std 3,64(1); \ | |
std 0,8(1); \ | |
ld 3,72(1); /* pass MASK to CDISABLE. */ \ | |
CDISABLE; \ | |
ld 9,128+16(1); \ | |
ld 0,8(1); /* restore CR/R3. */ \ | |
ld 3,64(1); \ | |
mtlr 9; \ | |
mtcr 0; \ | |
addi 1,1,128; | |
# define DOCARGS_0 | |
# define UNDOCARGS_0 | |
# define DOCARGS_1 std 3,80(1); DOCARGS_0 | |
# define UNDOCARGS_1 ld 3,80(1); UNDOCARGS_0 | |
# define DOCARGS_2 std 4,88(1); DOCARGS_1 | |
# define UNDOCARGS_2 ld 4,88(1); UNDOCARGS_1 | |
# define DOCARGS_3 std 5,96(1); DOCARGS_2 | |
# define UNDOCARGS_3 ld 5,96(1); UNDOCARGS_2 | |
# define DOCARGS_4 std 6,104(1); DOCARGS_3 | |
# define UNDOCARGS_4 ld 6,104(1); UNDOCARGS_3 | |
# define DOCARGS_5 std 7,112(1); DOCARGS_4 | |
# define UNDOCARGS_5 ld 7,112(1); UNDOCARGS_4 | |
# define DOCARGS_6 std 8,120(1); DOCARGS_5 | |
# define UNDOCARGS_6 ld 8,120(1); UNDOCARGS_5 | |
# ifdef IS_IN_libpthread | |
# define CENABLE bl JUMPTARGET(__pthread_enable_asynccancel) | |
# define CDISABLE bl JUMPTARGET(__pthread_disable_asynccancel) | |
# elif !defined NOT_IN_libc | |
# define CENABLE bl JUMPTARGET(__libc_enable_asynccancel) | |
# define CDISABLE bl JUMPTARGET(__libc_disable_asynccancel) | |
# elif defined IS_IN_librt | |
# define CENABLE bl JUMPTARGET(__librt_enable_asynccancel) | |
# define CDISABLE bl JUMPTARGET(__librt_disable_asynccancel) | |
# 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(13); \ | |
cmpwi 10,0 | |
# endif | |
#elif !defined __ASSEMBLER__ | |
# define SINGLE_THREAD_P (1) | |
# define NO_CANCELLATION 1 | |
#endif |