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/* Copyright (C) 2003 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; see the file COPYING.LIB. If
not, see <http://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <tls.h>
/* #include <pt-machine.h> */
#ifndef __ASSEMBLER__
# include <pthreadP.h>
#endif
#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
#ifdef __ASSEMBLER__
#if defined(__XTENSA_WINDOWED_ABI__)
/* CENABLE/CDISABLE in PSEUDO below use call8, stack frame size must be
* at least 32.
*/
#if FRAMESIZE < 32
#undef FRAMESIZE
#define FRAMESIZE 32
#endif
# undef PSEUDO
# define PSEUDO(name, syscall_name, args) \
.text; \
ENTRY (name) \
SINGLE_THREAD_P(a15); \
bnez a15, .Lpseudo_cancel; \
DO_CALL (syscall_name, args); \
bgez a2, .Lpseudo_done; \
movi a4, -4095; \
blt a2, a4, .Lpseudo_done; \
j SYSCALL_ERROR_LABEL; \
.Lpseudo_done: \
retw; \
.Lpseudo_cancel: \
/* The syscall args are in a2...a7; no need to save */ \
CENABLE; \
/* The return value is in a10 and preserved across the syscall */ \
DO_CALL (syscall_name, args); \
CDISABLE; \
bgez a2, .Lpseudo_end; \
movi a4, -4095; \
blt a2, a4, .Lpseudo_end; \
j SYSCALL_ERROR_LABEL; \
.Lpseudo_end:
# define CENABLE movi a8, CENABLE_FUNC; \
callx8 a8
# define CDISABLE movi a8, CDISABLE_FUNC; \
callx8 a8
#elif defined(__XTENSA_CALL0_ABI__)
# undef PSEUDO
# define PSEUDO(name, syscall_name, args) \
.text; \
ENTRY (name) \
SINGLE_THREAD_P(a10); \
bnez a10, .Lpseudo_cancel; \
DO_CALL (syscall_name, args); \
bgez a2, .Lpseudo_done; \
movi a4, -4095; \
blt a2, a4, .Lpseudo_done; \
j SYSCALL_ERROR_LABEL; \
.Lpseudo_done: \
ret; \
.Lpseudo_cancel: \
addi a1, a1, -32; \
/* The syscall args are in a2...a7; save them */ \
s32i a0, a1, 0; \
s32i a2, a1, 4; \
s32i a3, a1, 8; \
s32i a4, a1, 12; \
s32i a5, a1, 16; \
s32i a6, a1, 20; \
s32i a7, a1, 24; \
CENABLE; \
/* Move return value to a10 preserved across the syscall */ \
mov a10, a2; \
l32i a2, a1, 4; \
l32i a3, a1, 8; \
l32i a4, a1, 12; \
l32i a5, a1, 16; \
l32i a6, a1, 20; \
l32i a7, a1, 24; \
DO_CALL (syscall_name, args); \
s32i a2, a1, 4; \
mov a2, a10; \
CDISABLE; \
l32i a2, a1, 4; \
l32i a0, a1, 0; \
addi a1, a1, 32; \
bgez a2, .Lpseudo_end; \
movi a4, -4095; \
blt a2, a4, .Lpseudo_end; \
j SYSCALL_ERROR_LABEL; \
.Lpseudo_end:
# define CENABLE movi a0, CENABLE_FUNC; \
callx0 a0
# define CDISABLE movi a0, CDISABLE_FUNC; \
callx0 a0
#else
#error Unsupported Xtensa ABI
#endif
#endif
# ifdef IS_IN_libpthread
# define CENABLE_FUNC __pthread_enable_asynccancel
# define CDISABLE_FUNC __pthread_disable_asynccancel
# define __local_multiple_threads __pthread_multiple_threads
# elif !defined NOT_IN_libc
# define CENABLE_FUNC __libc_enable_asynccancel
# define CDISABLE_FUNC __libc_disable_asynccancel
# define __local_multiple_threads __libc_multiple_threads
# elif defined IS_IN_librt
# define CENABLE_FUNC __librt_enable_asynccancel
# define CDISABLE_FUNC __librt_disable_asynccancel
# else
# error Unsupported library
# endif
# if defined IS_IN_libpthread || !defined NOT_IN_libc
# ifndef __ASSEMBLER__
extern int __local_multiple_threads attribute_hidden;
# define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
# else
# define SINGLE_THREAD_P(reg) movi reg, __local_multiple_threads; \
l32i reg, reg, 0;
# endif
# else
# ifndef __ASSEMBLER__
# define SINGLE_THREAD_P \
__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
header.multiple_threads) == 0, 1)
# else
# define SINGLE_THREAD_P(reg) \
rur reg, threadptr; \
l32i reg, reg, MULTIPLE_THREADS_OFFSET;
# endif
# endif
#else
/* This code should never be used but we define it anyhow. */
# 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
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