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/* Copyright (C) 2003, 2004, 2005, 2009 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. */
#include <tls.h>
#include <sysdep.h>
#ifndef __ASSEMBLER__
# include <pthreadP.h>
#endif
#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
/* NOTE: We do mark syscalls with unwind annotations, for the benefit of
cancellation; but they're really only accurate at the point of the
syscall. The ARM unwind directives are not rich enough without adding
a custom personality function. */
#ifdef __ASSEMBLER__
#undef ret
#define ret \
CMP D0Re0, #-4095; \
MOVLO PC, D1RtP; \
MOV D1Ar1, D0Re0; \
B SYSCALL_ERROR;
#endif /* __ASSEMBLER__ */
# undef PSEUDO
# define PSEUDO(name, syscall_name, args) \
.section ".text"; \
.type ___##syscall_name##_nocancel,%function; \
.globl ___##syscall_name##_nocancel; \
___##syscall_name##_nocancel: \
cfi_startproc; \
DO_CALL (syscall_name, args); \
MOV PC, D1RtP; \
cfi_endproc; \
.size ___##syscall_name##_nocancel,.-___##syscall_name##_nocancel; \
.globl _##name; \
.type _##name, @function; \
name##: \
_##name##: \
DOCARGS_##args; \
SINGLE_THREAD_P; \
UNDOCARGS_##args; \
BNE .Lpseudo_cancel; \
cfi_remember_state; \
DO_CALL (syscall_name, 0); \
ret \
cfi_restore_state; \
.Lpseudo_cancel: \
MSETL [A0StP++], D0FrT, D0.5; \
DOCARGS_##args; /* save syscall args etc. around CENABLE. */ \
CENABLE; \
MOV D0FrT, D0Re0; /* put mask in safe place. */ \
UNDOCARGS_##args; /* restore syscall args. */ \
DO_CALL(syscall_name, 0); /* do the call. */ \
MOV D0.5, D0Re0; /* save syscall return value. */ \
MOV D1Ar1, D0FrT; /* get mask back. */ \
CDISABLE; \
MOV D0Re0, D0.5; /* retrieve return value. */ \
GETL D0.5, D1.5, [--A0StP]; \
GETL D0FrT, D1RtP, [--A0StP];
# define DOCARGS_0
# define UNDOCARGS_0
# define DOCARGS_1 \
SETL [A0StP++], D1Ar1, D0Ar2
# define UNDOCARGS_1 \
GETL D1Ar1, D0Ar2, [--A0StP]
# define DOCARGS_2 DOCARGS_1
# define UNDOCARGS_2 UNDOCARGS_2
# define DOCARGS_3 \
MSETL [A0StP++], D1Ar1, D1Ar3
# define UNDOCARGS_3 \
GETL D1Ar1, D0Ar2, [--A0StP]; \
GETL D1Ar3, D0Ar4, [--A0StP]
# define DOCARGS_4 DOCARGS_3
# define UNDOCARGS_4 UNDOCARGS_3
# define DOCARGS_5 \
MSETL [A0StP++], D1Ar1, D1Ar3, D1Ar5
# define UNDOCARGS_5 \
GETL D1Ar1, D0Ar2, [--A0StP]; \
GETL D1Ar3, D0Ar4, [--A0StP]; \
GETL D1Ar5, D0Ar6, [--A0StP]
# define DOCARGS_6 DOCARGS_5
# define UNDOCARGS_6 UNDOCARGS_5
# ifdef IS_IN_libpthread
# define CENABLE CALLR D1RtP, ___pthread_enable_asynccancel@PLT
# define CDISABLE CALLR D1RtP, ___pthread_disable_asynccancel@PLT
# define __local_multiple_threads __pthread_multiple_threads
# elif !defined NOT_IN_libc
# define CENABLE CALLR D1RtP, ___libc_enable_asynccancel@PLT
# define CDISABLE CALLR D1RtP, ___libc_disable_asynccancel@PLT
# define __local_multiple_threads __libc_multiple_threads
# elif defined IS_IN_librt
# define CENABLE CALLR D1RtP, ___librt_enable_asynccancel@PLT
# define CDISABLE CALLR D1RtP, ___librt_disable_asynccancel@PLT
# else
# error Unsupported library
# endif
#ifndef __ASSEMBLER__
# define SINGLE_THREAD_P \
likely(THREAD_GETMEM (THREAD_SELF, \
header.multiple_threads) == 0)
#else
# define SINGLE_THREAD_P \
SETL [A0StP++], D0FrT, D1RtP; \
CALLR D1RtP, ___metag_load_tp@PLT; \
SUB D0Re0, D0Re0, #TLS_PRE_TCB_SIZE; \
GETD D0Re0, [D0Re0 + #MULTIPLE_THREADS_OFFSET]; \
CMP D0Re0, #0; \
GETL D0FrT, D1RtP, [--A0StP]
#endif
#elif !defined __ASSEMBLER__
/* For rtld, et cetera. */
# define SINGLE_THREAD_P 1
# define NO_CANCELLATION 1
#endif
#ifndef __ASSEMBLER__
# define RTLD_SINGLE_THREAD_P \
likely(THREAD_GETMEM (THREAD_SELF, \
header.multiple_threads) == 0)
#endif
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