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/*
* Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com)
*
* Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
*/
#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
#ifdef __ASSEMBLER__
#undef ret
#define ret
# undef PSEUDO
# define PSEUDO(name, syscall_name, nargs) \
/* vanilla version */ ` \
ENTRY(name##_nocancel) ` \
DO_CALL (__NR_##syscall_name) ` \
jls [blink] ` \
b __syscall_error@plt ` \
END(name##_nocancel) ` \
/* thread cancellation variant */ ` \
ENTRY(name) ` \
SINGLE_THREAD_P ` \
bz name##_nocancel ` \
DOCARGS_##nargs /* stash syscall args */ ` \
CENABLE /* call enable_asynccancel */ ` \
mov r9, r0 /* Safe-keep mask */ ` \
UNDOCARGS_##nargs /* restore syscall args */ ` \
DO_CALL (__NR_##syscall_name) ` \
push r0 /* save syscall return value */ ` \
mov r0, r9 /* prep mask for disable_asynccancel */ ` \
CDISABLE ` \
pop r0 /* get syscall ret value back */ ` \
pop blink /* UNDOCARGS above left blink on stack */ ` \
cmp r0, -1024 ` \
jls [blink] ` \
b __syscall_error@plt ` \
END(name)
#undef PSEUDO_END
#define PSEUDO_END(name) \
# ifdef IS_IN_libpthread
# define CENABLE bl __pthread_enable_asynccancel
# define CDISABLE bl __pthread_disable_asynccancel
# define __local_multiple_threads __pthread_multiple_threads
# elif !defined NOT_IN_libc
# define CENABLE bl __libc_enable_asynccancel
# define CDISABLE bl __libc_disable_asynccancel
# define __local_multiple_threads __libc_multiple_threads
# elif defined IS_IN_librt
# define CENABLE bl __librt_enable_asynccancel
# define CDISABLE bl __librt_disable_asynccancel
# else
# error Unsupported library
# endif
#define DO_CALL(num) \
mov r8, num ` \
ARC_TRAP_INSN ` \
cmp r0, -1024
.macro push reg
st.a \reg, [sp, -4]
.endm
.macro pop reg
ld.ab \reg, [sp, 4]
.endm
#define DOCARGS_0 push blink
/* don't pop blink at this point */
#define UNDOCARGS_0 ld blink, [sp]
#define DOCARGS_1 DOCARGS_0` push r0
#define UNDOCARGS_1 pop r0` UNDOCARGS_0
#define DOCARGS_2 DOCARGS_1` push r1
#define UNDOCARGS_2 pop r1` UNDOCARGS_1
#define DOCARGS_3 DOCARGS_2` push r2
#define UNDOCARGS_3 pop r2` UNDOCARGS_2
#define DOCARGS_4 DOCARGS_3` push r3
#define UNDOCARGS_4 pop r3` UNDOCARGS_3
#define DOCARGS_5 DOCARGS_4` push r4
#define UNDOCARGS_5 pop r4` UNDOCARGS_4
#define DOCARGS_6 DOCARGS_5` push r5
#define UNDOCARGS_6 pop r5` UNDOCARGS_5
#define DOCARGS_7 DOCARGS_6` push r6
#define UNDOCARGS_7 pop r6` UNDOCARGS_6
# define SINGLE_THREAD_P \
THREAD_SELF r9 ` \
ld r10, [r9, MULTIPLE_THREADS_OFFSET]` \
cmp r10, 0
/* ld r2, [r1, -TLS_PRE_TCB_SIZE + MULTIPLE_THREADS_OFFSET] */
#else /* !__ASSEMBLER__ */
/* TBD: Can use @__local_multiple_threads for libc/libpthread like ARM */
# define SINGLE_THREAD_P \
likely(THREAD_GETMEM (THREAD_SELF, header.multiple_threads) == 0)
#endif /* __ASSEMBLER__ */
#endif
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