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/* Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jakub Jelinek <jakub@redhat.com>, 2002.
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 <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
# undef PSEUDO
# define PSEUDO(name, syscall_name, args) \
.text; \
ENTRY (name) \
SINGLE_THREAD_P; \
jne L(pseudo_cancel); \
.type __##syscall_name##_nocancel,@function; \
.globl __##syscall_name##_nocancel; \
__##syscall_name##_nocancel: \
DO_CALL (syscall_name, args); \
cmpq $-4095, %rax; \
jae SYSCALL_ERROR_LABEL; \
ret; \
.size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \
L(pseudo_cancel): \
/* Save registers that might get destroyed. */ \
SAVESTK_##args \
PUSHARGS_##args \
CENABLE \
/* Restore registers. */ \
POPARGS_##args \
/* The return value from CENABLE is argument for CDISABLE. */ \
movq %rax, (%rsp); \
movl $SYS_ify (syscall_name), %eax; \
syscall; \
movq (%rsp), %rdi; \
/* Save %rax since it's the error code from the syscall. */ \
movq %rax, 8(%rsp); \
CDISABLE \
movq 8(%rsp), %rax; \
RESTSTK_##args \
cmpq $-4095, %rax; \
jae SYSCALL_ERROR_LABEL; \
L(pseudo_end):
# define PUSHARGS_0 /* Nothing. */
# define PUSHARGS_1 PUSHARGS_0 movq %rdi, 8(%rsp);
# define PUSHARGS_2 PUSHARGS_1 movq %rsi, 16(%rsp);
# define PUSHARGS_3 PUSHARGS_2 movq %rdx, 24(%rsp);
# define PUSHARGS_4 PUSHARGS_3 movq %rcx, 32(%rsp);
# define PUSHARGS_5 PUSHARGS_4 movq %r8, 40(%rsp);
# define PUSHARGS_6 PUSHARGS_5 movq %r9, 48(%rsp);
# define POPARGS_0 /* Nothing. */
# define POPARGS_1 POPARGS_0 movq 8(%rsp), %rdi;
# define POPARGS_2 POPARGS_1 movq 16(%rsp), %rsi;
# define POPARGS_3 POPARGS_2 movq 24(%rsp), %rdx;
# define POPARGS_4 POPARGS_3 movq 32(%rsp), %r10;
# define POPARGS_5 POPARGS_4 movq 40(%rsp), %r8;
# define POPARGS_6 POPARGS_5 movq 48(%rsp), %r9;
/* We always have to align the stack before calling a function. */
# define SAVESTK_0 subq $24, %rsp; cfi_adjust_cfa_offset (24);
# define SAVESTK_1 SAVESTK_0
# define SAVESTK_2 SAVESTK_1
# define SAVESTK_3 subq $40, %rsp; cfi_adjust_cfa_offset (40);
# define SAVESTK_4 SAVESTK_3
# define SAVESTK_5 subq $56, %rsp; cfi_adjust_cfa_offset (56);
# define SAVESTK_6 SAVESTK_5
# define RESTSTK_0 addq $24,%rsp; cfi_adjust_cfa_offset (-24);
# define RESTSTK_1 RESTSTK_0
# define RESTSTK_2 RESTSTK_1
# define RESTSTK_3 addq $40, %rsp; cfi_adjust_cfa_offset (-40);
# define RESTSTK_4 RESTSTK_3
# define RESTSTK_5 addq $56, %rsp; cfi_adjust_cfa_offset (-56);
# define RESTSTK_6 RESTSTK_5
# ifdef IS_IN_libpthread
# define CENABLE call __pthread_enable_asynccancel;
# define CDISABLE call __pthread_disable_asynccancel;
# define __local_multiple_threads __pthread_multiple_threads
# elif !defined NOT_IN_libc
# define CENABLE call __libc_enable_asynccancel;
# define CDISABLE call __libc_disable_asynccancel;
# define __local_multiple_threads __libc_multiple_threads
# elif defined IS_IN_librt
# define CENABLE call __librt_enable_asynccancel;
# define CDISABLE call __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 cmpl $0, __local_multiple_threads(%rip)
# endif
# else
# ifndef __ASSEMBLER__
# define SINGLE_THREAD_P \
__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
header.multiple_threads) == 0, 1)
# else
# define SINGLE_THREAD_P cmpl $0, %fs:MULTIPLE_THREADS_OFFSET
# endif
# endif
#elif !defined __ASSEMBLER__
# ifdef IS_IN_rtld
# define SINGLE_THREAD_P \
__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
header.multiple_threads) == 0, 1)
# else
# define SINGLE_THREAD_P (1)
# endif
# define NO_CANCELLATION 1
#endif
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