mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-27 04:41:02 +08:00
7a1147946e
2003-06-15 Ulrich Drepper <drepper@redhat.com> Fix cancellation point handling wrt exception based cleanup. * io/Makefile: Compile fcntl.c, poll.c, and lockf.c with exceptions. * misc/Makefile: Compile pselect.c, readv.c, writev.c, and usleep.c with exceptions. * posix/Makefile: Compile pread.c, pread64.c, pwrite.c, pwrite64.c, sleep.c, wait.c, waitid.c, and waitpid.c with exceptions. * rt/Makefile: Compile aio_suspend.c and clock_nanosleep.c with exceptions. * signal/Makefile: Compile sigpause.c, sigsuspend.c, sigtimedwait.c, sigwait.c, and sigwaitinfo.c with exceptions. * stdlib/Makefile: Compile system.c with exceptions. * sysvipc/Makefile: Compile msgrcv.c and msgsnd.c with exceptions. * termios/Makefile: Compile tcdrain.c with exceptions. * sysdeps/generic/lockf.c: Add comment explaining the cancellation situation. * sysdeps/generic/pselect.c: Likewise. * sysdeps/posix/sigpause.c: Likewise. * sysdeps/posix/system.c: Likewise. * sysdeps/posix/waitid.c: Likewise. * sysdeps/unix/sysv/linux/sleep.c: Likewise. * sysdeps/unix/sysv/linux/usleep.c: Likewise. * sysdeps/unix/sysv/linux/i386/sysdep.h: Major rewrite of INTERNAL_SYSCALL to not use push inside asm statement so that unwind info is correct around the syscall. * sysdeps/unix/clock_nanosleep.c: Add cancellation support. * sysdeps/unix/sysv/linux/clock_nanosleep.c: Likewise.
371 lines
15 KiB
C
371 lines
15 KiB
C
/* Copyright (C) 2002, 2003 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) \
|
|
L(name##START): \
|
|
cmpl $0, %gs:MULTIPLE_THREADS_OFFSET; \
|
|
jne L(pseudo_cancel); \
|
|
DO_CALL (syscall_name, args); \
|
|
cmpl $-4095, %eax; \
|
|
jae SYSCALL_ERROR_LABEL; \
|
|
ret; \
|
|
L(pseudo_cancel): \
|
|
CENABLE \
|
|
SAVE_OLDTYPE_##args \
|
|
PUSHCARGS_##args \
|
|
DOCARGS_##args \
|
|
movl $SYS_ify (syscall_name), %eax; \
|
|
ENTER_KERNEL; \
|
|
POPCARGS_##args; \
|
|
POPSTATE_##args \
|
|
cmpl $-4095, %eax; \
|
|
jae SYSCALL_ERROR_LABEL; \
|
|
L(pseudo_end): \
|
|
\
|
|
/* Create unwinding information for the syscall wrapper. */ \
|
|
.section .eh_frame,"a",@progbits; \
|
|
L(STARTFRAME): \
|
|
/* Length of the CIE. */ \
|
|
.long L(ENDCIE)-L(STARTCIE); \
|
|
L(STARTCIE): \
|
|
/* CIE ID. */ \
|
|
.long 0; \
|
|
/* Version number. */ \
|
|
.byte 1; \
|
|
/* NUL-terminated augmentation string. */ \
|
|
AUGMENTATION_STRING; \
|
|
/* Code alignment factor. */ \
|
|
.uleb128 1; \
|
|
/* Data alignment factor. */ \
|
|
.sleb128 -4; \
|
|
/* Return address register column. */ \
|
|
.byte 8; \
|
|
/* Optional augmentation parameter. */ \
|
|
AUGMENTATION_PARAM \
|
|
/* Start of the table initialization. */ \
|
|
.byte 0xc; /* DW_CFA_def_cfa */ \
|
|
.uleb128 4; \
|
|
.uleb128 4; \
|
|
.byte 0x88; /* DW_CFA_offset, column 0x8 */ \
|
|
.uleb128 1; \
|
|
.align 4; \
|
|
L(ENDCIE): \
|
|
/* Length of the FDE. */ \
|
|
.long L(ENDFDE)-L(STARTFDE); \
|
|
L(STARTFDE): \
|
|
/* CIE pointer. */ \
|
|
.long L(STARTFDE)-L(STARTFRAME); \
|
|
/* Start address of the code. */ \
|
|
START_SYMBOL_REF (name); \
|
|
/* Length of the code. */ \
|
|
.long L(name##END)-L(name##START); \
|
|
/* Augmentation data. */ \
|
|
AUGMENTATION_PARAM_FDE \
|
|
/* The rest of the code depends on the number of parameters the syscall \
|
|
takes. */ \
|
|
EH_FRAME_##args(name); \
|
|
.align 4; \
|
|
L(ENDFDE): \
|
|
.previous
|
|
|
|
#ifdef SHARED
|
|
/* NUL-terminated augmentation string. Note "z" means there is an
|
|
augmentation value later on. */
|
|
# define AUGMENTATION_STRING .string "zR"
|
|
# define AUGMENTATION_PARAM \
|
|
/* Augmentation value length. */ \
|
|
.uleb128 1; \
|
|
/* Encoding: DW_EH_PE_pcrel + DW_EH_PE_sdata4. */ \
|
|
.byte 0x1b;
|
|
# define AUGMENTATION_PARAM_FDE \
|
|
/* No augmentation data. */ \
|
|
.uleb128 0;
|
|
# define START_SYMBOL_REF(name) \
|
|
/* PC-relative start address of the code. */ \
|
|
.long L(name##START)-.
|
|
#else
|
|
/* No augmentation. */
|
|
# define AUGMENTATION_STRING .ascii "\0"
|
|
# define AUGMENTATION_PARAM /* nothing */
|
|
# define AUGMENTATION_PARAM_FDE /* nothing */
|
|
# define START_SYMBOL_REF(name) \
|
|
/* Absolute start address of the code. */ \
|
|
.long L(name##START)
|
|
#endif
|
|
|
|
/* Callframe description for syscalls without parameters. This is very
|
|
simple. The only place the stack pointer is changed is when the old
|
|
cancellation state value is saved. */
|
|
# define EH_FRAME_0(name) \
|
|
.byte 0x40+L(PUSHSTATE)-L(name##START); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 8; \
|
|
.byte 0x40+L(POPSTATE)-L(PUSHSTATE); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 4
|
|
|
|
/* For syscalls with one and two parameters the code is the same as for
|
|
those which take no parameter. */
|
|
# define EH_FRAME_1(name) \
|
|
.byte 0x40+L(SAVEBX1)-L(name##START); /* DW_CFA_advance_loc+N */ \
|
|
.byte 9; /* DW_CFA_register */ \
|
|
.uleb128 3; /* %ebx */ \
|
|
.uleb128 2; /* %edx */ \
|
|
.byte 0x40+L(RESTBX1)-L(SAVEBX1); /* DW_CFA_advance_loc+N */ \
|
|
.byte 0xc3; /* DW_CFA_restore %ebx */ \
|
|
.byte 0x40+L(PUSHSTATE)-L(RESTBX1); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 8; \
|
|
.byte 0x40+L(SAVEBX2)-L(PUSHSTATE); /* DW_CFA_advance_loc+N */ \
|
|
.byte 9; /* DW_CFA_register */ \
|
|
.uleb128 3; /* %ebx */ \
|
|
.uleb128 2; /* %edx */ \
|
|
.byte 0x40+L(RESTBX2)-L(SAVEBX2); /* DW_CFA_advance_loc+N */ \
|
|
.byte 0xc3; /* DW_CFA_restore %ebx */ \
|
|
.byte 0x40+L(POPSTATE)-L(RESTBX2); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 4
|
|
|
|
# define EH_FRAME_2(name) EH_FRAME_1 (name)
|
|
|
|
/* For syscalls with three parameters the stack pointer is changed
|
|
also to save the content of the %ebx register. */
|
|
# define EH_FRAME_3(name) \
|
|
.byte 0x40+L(PUSHBX1)-L(name##START); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 8; \
|
|
.byte 0x83; /* DW_CFA_offset %ebx */ \
|
|
.uleb128 2; \
|
|
.byte 0x40+L(POPBX1)-L(PUSHBX1); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 4; \
|
|
.byte 0xc3; /* DW_CFA_restore %ebx */ \
|
|
.byte 0x40+L(PUSHSTATE)-L(POPBX1); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 8; \
|
|
.byte 0x40+L(PUSHBX2)-L(PUSHSTATE); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 12; \
|
|
.byte 0x83; /* DW_CFA_offset %ebx */ \
|
|
.uleb128 3; \
|
|
.byte 0x40+L(POPBX2)-L(PUSHBX2); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 8; \
|
|
.byte 0xc3; /* DW_CFA_restore %ebx */ \
|
|
.byte 0x40+L(POPSTATE)-L(POPBX2); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 4
|
|
|
|
/* With four parameters the syscall wrappers have to save %ebx and %esi. */
|
|
# define EH_FRAME_4(name) \
|
|
.byte 0x40+L(PUSHSI1)-L(name##START); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 8; \
|
|
.byte 0x86; /* DW_CFA_offset %esi */ \
|
|
.uleb128 2; \
|
|
.byte 0x40+L(PUSHBX1)-L(PUSHSI1); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 12; \
|
|
.byte 0x83; /* DW_CFA_offset %ebx */ \
|
|
.uleb128 3; \
|
|
.byte 0x40+L(POPBX1)-L(PUSHBX1); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 8; \
|
|
.byte 0xc3; /* DW_CFA_restore %ebx */ \
|
|
.byte 0x40+L(POPSI1)-L(POPBX1); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 4; \
|
|
.byte 0xc6; /* DW_CFA_restore %esi */ \
|
|
.byte 0x40+L(PUSHSTATE)-L(POPSI1); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 8; \
|
|
.byte 0x40+L(PUSHSI2)-L(PUSHSTATE); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 12; \
|
|
.byte 0x86; /* DW_CFA_offset %esi */ \
|
|
.uleb128 3; \
|
|
.byte 0x40+L(PUSHBX2)-L(PUSHSI2); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 16; \
|
|
.byte 0x83; /* DW_CFA_offset %ebx */ \
|
|
.uleb128 4; \
|
|
.byte 0x40+L(POPBX2)-L(PUSHBX2); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 12; \
|
|
.byte 0xc3; /* DW_CFA_restore %ebx */ \
|
|
.byte 0x40+L(POPSI2)-L(POPBX2); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 8; \
|
|
.byte 0xc6; /* DW_CFA_restore %esi */ \
|
|
.byte 0x40+L(POPSTATE)-L(POPSI2); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 4
|
|
|
|
/* With five parameters the syscall wrappers have to save %ebx, %esi,
|
|
and %edi. */
|
|
# define EH_FRAME_5(name) \
|
|
.byte 0x40+L(PUSHDI1)-L(name##START); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 8; \
|
|
.byte 0x87; /* DW_CFA_offset %edi */ \
|
|
.uleb128 2; \
|
|
.byte 0x40+L(PUSHSI1)-L(PUSHDI1); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 12; \
|
|
.byte 0x86; /* DW_CFA_offset %esi */ \
|
|
.uleb128 3; \
|
|
.byte 0x40+L(PUSHBX1)-L(PUSHSI1); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 16; \
|
|
.byte 0x83; /* DW_CFA_offset %ebx */ \
|
|
.uleb128 4; \
|
|
.byte 0x40+L(POPBX1)-L(PUSHBX1); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 12; \
|
|
.byte 0xc3; /* DW_CFA_restore %ebx */ \
|
|
.byte 0x40+L(POPSI1)-L(POPBX1); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 8; \
|
|
.byte 0xc6; /* DW_CFA_restore %esi */ \
|
|
.byte 0x40+L(POPDI1)-L(POPSI1); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 4; \
|
|
.byte 0xc7; /* DW_CFA_restore %edi */ \
|
|
.byte 0x40+L(PUSHSTATE)-L(POPDI1); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 8; \
|
|
.byte 0x40+L(PUSHDI2)-L(PUSHSTATE); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 12; \
|
|
.byte 0x87; /* DW_CFA_offset %edi */ \
|
|
.uleb128 3; \
|
|
.byte 0x40+L(PUSHSI2)-L(PUSHDI2); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 16; \
|
|
.byte 0x86; /* DW_CFA_offset %esi */ \
|
|
.uleb128 4; \
|
|
.byte 0x40+L(PUSHBX2)-L(PUSHSI2); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 20; \
|
|
.byte 0x83; /* DW_CFA_offset %ebx */ \
|
|
.uleb128 5; \
|
|
.byte 0x40+L(POPBX2)-L(PUSHBX2); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 16; \
|
|
.byte 0xc3; /* DW_CFA_restore %ebx */ \
|
|
.byte 0x40+L(POPSI2)-L(POPBX2); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 12; \
|
|
.byte 0xc6; /* DW_CFA_restore %esi */ \
|
|
.byte 0x40+L(POPDI2)-L(POPSI2); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 8; \
|
|
.byte 0xc7; /* DW_CFA_restore %edi */ \
|
|
.byte 0x40+L(POPSTATE)-L(POPDI2); /* DW_CFA_advance_loc+N */ \
|
|
.byte 14; /* DW_CFA_def_cfa_offset */ \
|
|
.uleb128 4
|
|
|
|
|
|
# undef ASM_SIZE_DIRECTIVE
|
|
# define ASM_SIZE_DIRECTIVE(name) L(name##END): .size name,.-name;
|
|
|
|
# define SAVE_OLDTYPE_0 movl %eax, %edx;
|
|
# define SAVE_OLDTYPE_1 SAVE_OLDTYPE_0
|
|
# define SAVE_OLDTYPE_2 pushl %eax; L(PUSHSTATE):
|
|
# define SAVE_OLDTYPE_3 SAVE_OLDTYPE_2
|
|
# define SAVE_OLDTYPE_4 SAVE_OLDTYPE_2
|
|
# define SAVE_OLDTYPE_5 SAVE_OLDTYPE_2
|
|
|
|
# define PUSHCARGS_0 /* No arguments to push. */
|
|
# define DOCARGS_0 /* No arguments to frob. */
|
|
# define POPCARGS_0 /* No arguments to pop. */
|
|
# define _PUSHCARGS_0 /* No arguments to push. */
|
|
# define _POPCARGS_0 /* No arguments to pop. */
|
|
|
|
# define PUSHCARGS_1 movl %ebx, %edx; L(SAVEBX2): PUSHCARGS_0
|
|
# define DOCARGS_1 _DOARGS_1 (4)
|
|
# define POPCARGS_1 POPCARGS_0; movl %edx, %ebx; L(RESTBX2):
|
|
# define _PUSHCARGS_1 pushl %ebx; L(PUSHBX2): _PUSHCARGS_0
|
|
# define _POPCARGS_1 _POPCARGS_0; popl %ebx; L(POPBX2):
|
|
|
|
# define PUSHCARGS_2 PUSHCARGS_1
|
|
# define DOCARGS_2 _DOARGS_2 (12)
|
|
# define POPCARGS_2 POPCARGS_1
|
|
# define _PUSHCARGS_2 _PUSHCARGS_1
|
|
# define _POPCARGS_2 _POPCARGS_1
|
|
|
|
# define PUSHCARGS_3 _PUSHCARGS_2
|
|
# define DOCARGS_3 _DOARGS_3 (20)
|
|
# define POPCARGS_3 _POPCARGS_3
|
|
# define _PUSHCARGS_3 _PUSHCARGS_2
|
|
# define _POPCARGS_3 _POPCARGS_2
|
|
|
|
# define PUSHCARGS_4 _PUSHCARGS_4
|
|
# define DOCARGS_4 _DOARGS_4 (28)
|
|
# define POPCARGS_4 _POPCARGS_4
|
|
# define _PUSHCARGS_4 pushl %esi; L(PUSHSI2): _PUSHCARGS_3
|
|
# define _POPCARGS_4 _POPCARGS_3; popl %esi; L(POPSI2):
|
|
|
|
# define PUSHCARGS_5 _PUSHCARGS_5
|
|
# define DOCARGS_5 _DOARGS_5 (36)
|
|
# define POPCARGS_5 _POPCARGS_5
|
|
# define _PUSHCARGS_5 pushl %edi; L(PUSHDI2): _PUSHCARGS_4
|
|
# define _POPCARGS_5 _POPCARGS_4; popl %edi; L(POPDI2):
|
|
|
|
# ifdef IS_IN_libpthread
|
|
# define CENABLE call __pthread_enable_asynccancel;
|
|
# define CDISABLE call __pthread_disable_asynccancel
|
|
# else
|
|
# define CENABLE call __libc_enable_asynccancel;
|
|
# define CDISABLE call __libc_disable_asynccancel
|
|
# endif
|
|
# define POPSTATE_0 \
|
|
pushl %eax; L(PUSHSTATE): movl %ecx, %eax; CDISABLE; popl %eax; L(POPSTATE):
|
|
# define POPSTATE_1 POPSTATE_0
|
|
# define POPSTATE_2 xchgl (%esp), %eax; CDISABLE; popl %eax; L(POPSTATE):
|
|
# define POPSTATE_3 POPSTATE_2
|
|
# define POPSTATE_4 POPSTATE_3
|
|
# define POPSTATE_5 POPSTATE_4
|
|
|
|
# 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__
|
|
|
|
/* This code should never be used but we define it anyhow. */
|
|
# define SINGLE_THREAD_P (1)
|
|
|
|
#endif
|