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/* Copyright (C) 2002, 2003, 2004, 2005, 2006, 2008
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 <pthreadP.h>
#endif
/* XXX: We don't support _NOERRNO or _ERRVAL varietites. */
#undef PSEUDO_ERRNO
#undef PSEUDO_SUBCALL_NOERRNO
#undef PSEUDO_ERRVAL
#undef PSEUDO_SUBCALL_NOERRNO
/* This is needed so that we don't clobber %edx in the cancellation calls. */
#ifdef SYSCALL_64BIT_RETURN
# define SYSCALL_64BIT_PUSH_ASM pushl %edx; cfi_adjust_cfa_offset (4);
# define SYSCALL_64BIT_POP_ASM popl %edx; cfi_adjust_cfa_offset (-4);
#else
# define SYSCALL_64BIT_PUSH_ASM
# define SYSCALL_64BIT_POP_ASM
#endif
#ifdef SYSCALL_RESTARTABLE
# define DO_RESTART_CANCEL \
cmpl $ERESTART, %eax; \
je L(restart_cancel);
#else
# define DO_RESTART_CANCEL
#endif
#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
/* Note that CDISABLE is an internal function, so we need to
pass-by-register (we pass the argument in %eax). */
# undef PSEUDO
# define PSEUDO(name, syscall_name, args) \
.text; \
ENTRY (name) \
cmpl $0, %gs:MULTIPLE_THREADS_OFFSET; \
jne L(pseudo_cancel); \
.type __##syscall_name##_nocancel,@function; \
.globl __##syscall_name##_nocancel; \
__##syscall_name##_nocancel: \
L(restart): \
DO_CALL (syscall_name, args); \
jnb 2f; \
DO_RESTART \
jmp SYSCALL_ERROR_LABEL; \
2: ret; \
.size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \
L(pseudo_cancel): \
L(restart_cancel): \
CENABLE; \
movl %eax, %ecx; \
DO_CALL (syscall_name, args); \
jnb 3f; \
DO_RESTART_CANCEL \
pushl %eax; cfi_adjust_cfa_offset (4); \
SYSCALL_64BIT_PUSH_ASM \
movl %ecx, %eax; \
CDISABLE; \
SYSCALL_64BIT_POP_ASM \
popl %eax; cfi_adjust_cfa_offset (-4); \
jmp SYSCALL_ERROR_LABEL; \
3: \
pushl %eax; cfi_adjust_cfa_offset (4); \
SYSCALL_64BIT_PUSH_ASM \
movl %ecx, %eax; \
CDISABLE; \
SYSCALL_64BIT_POP_ASM \
popl %eax; cfi_adjust_cfa_offset (-4); \
L(pseudo_end):
# undef PSEUDO_SUBCALL
# define PSEUDO_SUBCALL(name, syscall_name, subcall_name, args) \
.text; \
ENTRY (name) \
cmpl $0, %gs:MULTIPLE_THREADS_OFFSET; \
jne L(pseudo_cancel); \
.type __##subcall_name##_nocancel,@function; \
.globl __##subcall_name##_nocancel; \
__##subcall_name##_nocancel: \
movl 0(%esp), %ecx; \
movl %ecx, -4(%esp); \
addl $-4, %esp; \
movl $SYS_ify (SUB_##subcall_name), 4(%esp); \
L(restart): \
DO_CALL (syscall_name, args); \
jnb 2f; \
DO_RESTART \
movl %ecx, 4(%esp); \
addl $-4, %esp; \
jmp SYSCALL_ERROR_LABEL; \
2: \
addl $4, %esp; \
movl %ecx, 0(%esp); \
ret; \
.size __##subcall_name##_nocancel,.-__##subcall_name##_nocancel; \
L(pseudo_cancel): \
CENABLE; \
movl %eax, %ecx; \
movl 0(%esp), %edx; \
movl %edx, -4(%esp); \
addl $-4, %esp; \
movl $SYS_ify (SUB_##subcall_name), 4(%esp); \
L(restart_cancel): \
DO_CALL (syscall_name, args); \
jnb 3f; \
DO_RESTART_CANCEL \
pushl %eax; cfi_adjust_cfa_offset (4); \
SYSCALL_64BIT_PUSH_ASM \
movl %ecx, %eax; \
CDISABLE; \
SYSCALL_64BIT_POP_ASM \
popl %eax; cfi_adjust_cfa_offset (-4); \
movl 0(%esp), %ecx; \
movl %ecx, 4(%esp); \
addl $4, %esp; \
jmp SYSCALL_ERROR_LABEL; \
3: \
pushl %eax; cfi_adjust_cfa_offset (4); \
SYSCALL_64BIT_PUSH_ASM \
movl %ecx, %eax; \
CDISABLE; \
SYSCALL_64BIT_POP_ASM \
popl %eax; cfi_adjust_cfa_offset (-4); \
movl 0(%esp), %ecx; \
movl %ecx, 4(%esp); \
addl $4, %esp; \
L(pseudo_end):
# define SAVE_OLDTYPE movl %eax, %ecx;
# ifdef IS_IN_libpthread
# define CENABLE call __pthread_enable_asynccancel;
# define CDISABLE call __pthread_disable_asynccancel
# elif !defined NOT_IN_libc
# define CENABLE call __libc_enable_asynccancel;
# define CDISABLE call __libc_disable_asynccancel
# elif defined IS_IN_librt
# define CENABLE call __librt_enable_asynccancel;
# define CDISABLE call __librt_disable_asynccancel
# else
# error Unsupported library
# endif
# ifndef __ASSEMBLER__
# define SINGLE_THREAD_P \
__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
header.multiple_threads) == 0, 1)
# else
# define SINGLE_THREAD_P cmpl $0, %gs:MULTIPLE_THREADS_OFFSET
# endif
#elif !defined __ASSEMBLER__
# 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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