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/* Copyright (C) 2003-2016 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, see
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <tls.h>
#ifndef __ASSEMBLER__
# include <nptl/pthreadP.h>
#endif
#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
/* ??? Assumes that nothing comes between PSEUDO and PSEUDO_END
besides "ret". */
# undef PSEUDO
# define PSEUDO(name, syscall_name, args) \
.globl __##syscall_name##_nocancel; \
.type __##syscall_name##_nocancel, @function; \
.usepv __##syscall_name##_nocancel, std; \
.align 4; \
cfi_startproc; \
__LABEL(__##syscall_name##_nocancel) \
ldgp gp, 0(pv); \
PSEUDO_PROF; \
__LABEL($pseudo_nocancel) \
PSEUDO_PREPARE_ARGS; \
lda v0, SYS_ify(syscall_name); \
call_pal PAL_callsys; \
bne a3, SYSCALL_ERROR_LABEL; \
__LABEL($pseudo_ret) \
.subsection 2; \
.size __##syscall_name##_nocancel, .-__##syscall_name##_nocancel; \
.globl name; \
.type name, @function; \
.usepv name, std; \
.align 4; \
cfi_startproc; \
__LABEL(name) \
ldgp gp, 0(pv); \
PSEUDO_PROF; \
SINGLE_THREAD_P(t0); \
beq t0, $pseudo_nocancel; \
subq sp, 64, sp; \
cfi_def_cfa_offset(64); \
stq ra, 0(sp); \
cfi_offset(ra, -64); \
SAVE_ARGS_##args; \
CENABLE; \
LOAD_ARGS_##args; \
/* Save the CENABLE return value in RA. That register \
is preserved across syscall and the real return \
address is saved on the stack. */ \
mov v0, ra; \
lda v0, SYS_ify(syscall_name); \
call_pal PAL_callsys; \
stq v0, 8(sp); \
mov ra, a0; \
bne a3, $multi_error; \
CDISABLE; \
ldq ra, 0(sp); \
ldq v0, 8(sp); \
addq sp, 64, sp; \
cfi_remember_state; \
cfi_restore(ra); \
cfi_def_cfa_offset(0); \
ret; \
cfi_restore_state; \
__LABEL($multi_error) \
CDISABLE; \
ldq ra, 0(sp); \
ldq v0, 8(sp); \
addq sp, 64, sp; \
cfi_restore(ra); \
cfi_def_cfa_offset(0); \
SYSCALL_ERROR_FALLTHRU; \
SYSCALL_ERROR_HANDLER; \
cfi_endproc; \
.previous
# undef PSEUDO_END
# define PSEUDO_END(sym) \
cfi_endproc; \
.subsection 2; \
.size sym, .-sym
# define SAVE_ARGS_0 /* Nothing. */
# define SAVE_ARGS_1 SAVE_ARGS_0; stq a0, 8(sp)
# define SAVE_ARGS_2 SAVE_ARGS_1; stq a1, 16(sp)
# define SAVE_ARGS_3 SAVE_ARGS_2; stq a2, 24(sp)
# define SAVE_ARGS_4 SAVE_ARGS_3; stq a3, 32(sp)
# define SAVE_ARGS_5 SAVE_ARGS_4; stq a4, 40(sp)
# define SAVE_ARGS_6 SAVE_ARGS_5; stq a5, 48(sp)
# define LOAD_ARGS_0 /* Nothing. */
# define LOAD_ARGS_1 LOAD_ARGS_0; ldq a0, 8(sp)
# define LOAD_ARGS_2 LOAD_ARGS_1; ldq a1, 16(sp)
# define LOAD_ARGS_3 LOAD_ARGS_2; ldq a2, 24(sp)
# define LOAD_ARGS_4 LOAD_ARGS_3; ldq a3, 32(sp)
# define LOAD_ARGS_5 LOAD_ARGS_4; ldq a4, 40(sp)
# define LOAD_ARGS_6 LOAD_ARGS_5; ldq a5, 48(sp)
# if IS_IN (libpthread)
# define __local_enable_asynccancel __pthread_enable_asynccancel
# define __local_disable_asynccancel __pthread_disable_asynccancel
# define __local_multiple_threads __pthread_multiple_threads
# elif IS_IN (libc)
# define __local_enable_asynccancel __libc_enable_asynccancel
# define __local_disable_asynccancel __libc_disable_asynccancel
# define __local_multiple_threads __libc_multiple_threads
# elif IS_IN (librt)
# define __local_enable_asynccancel __librt_enable_asynccancel
# define __local_disable_asynccancel __librt_disable_asynccancel
# else
# error Unsupported library
# endif
# ifdef PIC
# define CENABLE bsr ra, __local_enable_asynccancel !samegp
# define CDISABLE bsr ra, __local_disable_asynccancel !samegp
# else
# define CENABLE jsr ra, __local_enable_asynccancel; ldgp ra, 0(gp)
# define CDISABLE jsr ra, __local_disable_asynccancel; ldgp ra, 0(gp)
# endif
# if IS_IN (libpthread) || IS_IN (libc)
# ifndef __ASSEMBLER__
extern int __local_multiple_threads attribute_hidden;
# define SINGLE_THREAD_P \
__builtin_expect (__local_multiple_threads == 0, 1)
# elif defined(PIC)
# define SINGLE_THREAD_P(reg) ldl reg, __local_multiple_threads(gp) !gprel
# else
# define SINGLE_THREAD_P(reg) \
ldah reg, __local_multiple_threads(gp) !gprelhigh; \
ldl reg, __local_multiple_threads(reg) !gprellow
# 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) \
call_pal PAL_rduniq; \
ldl reg, MULTIPLE_THREADS_OFFSET($0)
# endif
# endif
#else
# 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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