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Add signalfd call to bionic

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Add signalfd() call to bionic.

Adding the signalfd call was done in 3 steps:
- add signalfd4 system call (function name and syscall
  number) to libc/SYSCALLS.TXT
- generate all necessary headers by calling
  libc/tools/gensyscalls.py. This patch is adding
  the generated files since the build system
  does not call gensyscalls.py.
- create the signalfd wrapper in signalfd.cpp and add
  the function prototype to sys/signalfd.h

Change-Id: I7ee1d3e60d5d3e1c73d9820e07d23b9ce6e1a5ab
This commit is contained in:
Rom Lemarchand 2013-01-09 15:46:06 -08:00
parent 5043c376c9
commit 0c11611c11
12 changed files with 227 additions and 0 deletions
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1
libc/Android.mk
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@ -284,6 +284,7 @@ libc_bionic_src_files := \
bionic/raise.cpp \
bionic/__set_errno.cpp \
bionic/setlocale.cpp \
bionic/signalfd.cpp \
bionic/__strcat_chk.cpp \
bionic/__strcpy_chk.cpp \
bionic/strerror.cpp \

1
libc/SYSCALLS.TXT
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@ -225,6 +225,7 @@ int __rt_sigaction:rt_sigaction (int sig, const struct sigaction *act, struc
int __rt_sigprocmask:rt_sigprocmask (int how, const sigset_t *set, sigset_t *oset, size_t sigsetsize) 175,175,195
int __rt_sigtimedwait:rt_sigtimedwait(const sigset_t *set, struct siginfo_t *info, struct timespec_t *timeout, size_t sigset_size) 177,177,197
int sigpending(sigset_t *) 73
int signalfd4(int fd, const sigset_t *mask, size_t sizemask, int flags) 355,327,324
# sockets
int socket(int, int, int) 281,-1,183

1
libc/arch-arm/syscalls.mk
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@ -150,6 +150,7 @@ syscall_src += arch-arm/syscalls/__rt_sigaction.S
syscall_src += arch-arm/syscalls/__rt_sigprocmask.S
syscall_src += arch-arm/syscalls/__rt_sigtimedwait.S
syscall_src += arch-arm/syscalls/sigpending.S
syscall_src += arch-arm/syscalls/signalfd4.S
syscall_src += arch-arm/syscalls/socket.S
syscall_src += arch-arm/syscalls/socketpair.S
syscall_src += arch-arm/syscalls/bind.S

14
libc/arch-arm/syscalls/signalfd4.S Normal file
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@ -0,0 +1,14 @@
/* autogenerated by gensyscalls.py */
#include <machine/asm.h>
#include <sys/linux-syscalls.h>
ENTRY(signalfd4)
.save {r4, r7}
stmfd sp!, {r4, r7}
ldr r7, =__NR_signalfd4
swi #0
ldmfd sp!, {r4, r7}
movs r0, r0
bxpl lr
b __set_syscall_errno
END(signalfd4)

1
libc/arch-mips/syscalls.mk
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@ -153,6 +153,7 @@ syscall_src += arch-mips/syscalls/__rt_sigaction.S
syscall_src += arch-mips/syscalls/__rt_sigprocmask.S
syscall_src += arch-mips/syscalls/__rt_sigtimedwait.S
syscall_src += arch-mips/syscalls/sigpending.S
syscall_src += arch-mips/syscalls/signalfd4.S
syscall_src += arch-mips/syscalls/socket.S
syscall_src += arch-mips/syscalls/socketpair.S
syscall_src += arch-mips/syscalls/bind.S

22
libc/arch-mips/syscalls/signalfd4.S Normal file
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@ -0,0 +1,22 @@
/* autogenerated by gensyscalls.py */
#include <sys/linux-syscalls.h>
.text
.globl signalfd4
.align 4
.ent signalfd4
signalfd4:
.set noreorder
.cpload $t9
li $v0, __NR_signalfd4
syscall
bnez $a3, 1f
move $a0, $v0
j $ra
nop
1:
la $t9,__set_errno
j $t9
nop
.set reorder
.end signalfd4

1
libc/arch-x86/syscalls.mk
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@ -154,6 +154,7 @@ syscall_src += arch-x86/syscalls/__rt_sigaction.S
syscall_src += arch-x86/syscalls/__rt_sigprocmask.S
syscall_src += arch-x86/syscalls/__rt_sigtimedwait.S
syscall_src += arch-x86/syscalls/sigpending.S
syscall_src += arch-x86/syscalls/signalfd4.S
syscall_src += arch-x86/syscalls/socket.S
syscall_src += arch-x86/syscalls/bind.S
syscall_src += arch-x86/syscalls/connect.S

32
libc/arch-x86/syscalls/signalfd4.S Normal file
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@ -0,0 +1,32 @@
/* autogenerated by gensyscalls.py */
#include <sys/linux-syscalls.h>
.text
.type signalfd4, @function
.globl signalfd4
.align 4
signalfd4:
pushl %ebx
pushl %ecx
pushl %edx
pushl %esi
mov 20(%esp), %ebx
mov 24(%esp), %ecx
mov 28(%esp), %edx
mov 32(%esp), %esi
movl $__NR_signalfd4, %eax
int $0x80
cmpl $-129, %eax
jb 1f
negl %eax
pushl %eax
call __set_errno
addl $4, %esp
orl $-1, %eax
1:
popl %esi
popl %edx
popl %ecx
popl %ebx
ret

58
libc/bionic/signalfd.cpp Normal file
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@ -0,0 +1,58 @@
/*
* Copyright (C) 2013 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/signalfd.h>
/* Despite the fact that our kernel headers define sigset_t explicitly
* as a 32-bit integer, the kernel system call really expects a 64-bit
* bitmap for the signal set, or more exactly an array of two-32-bit
* values (see $KERNEL/arch/$ARCH/include/asm/signal.h for details).
*
* Unfortunately, we cannot fix the sigset_t definition without breaking
* the C library ABI, so perform a little runtime translation here.
*/
typedef union {
sigset_t bionic;
uint32_t kernel[2];
} kernel_sigset_t;
extern "C" int signalfd4(int fd, kernel_sigset_t *mask, size_t sizemask, int flags);
int signalfd(int fd, const sigset_t *mask, int flags)
{
kernel_sigset_t in_set = {
.kernel = {
[0] = 0,
[1] = 0,
},
};
in_set.bionic = *mask;
return signalfd4(fd, &in_set, sizeof(in_set), flags);
}

3
libc/include/sys/linux-syscalls.h
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@ -173,6 +173,7 @@
#define __NR_rt_sigaction (__NR_SYSCALL_BASE + 174)
#define __NR_rt_sigprocmask (__NR_SYSCALL_BASE + 175)
#define __NR_rt_sigtimedwait (__NR_SYSCALL_BASE + 177)
#define __NR_signalfd4 (__NR_SYSCALL_BASE + 355)
#define __NR_socket (__NR_SYSCALL_BASE + 281)
#define __NR_socketpair (__NR_SYSCALL_BASE + 288)
#define __NR_bind (__NR_SYSCALL_BASE + 282)
@ -329,6 +330,7 @@
#define __NR_unshare (__NR_SYSCALL_BASE + 310)
#define __NR_getcpu (__NR_SYSCALL_BASE + 318)
#define __NR_utimensat (__NR_SYSCALL_BASE + 320)
#define __NR_signalfd4 (__NR_SYSCALL_BASE + 327)
#define __NR_eventfd2 (__NR_SYSCALL_BASE + 328)
#define __NR_pipe2 (__NR_SYSCALL_BASE + 331)
#define __NR_perf_event_open (__NR_SYSCALL_BASE + 336)
@ -463,6 +465,7 @@
#define __NR_ioprio_set (__NR_SYSCALL_BASE + 314)
#define __NR_ioprio_get (__NR_SYSCALL_BASE + 315)
#define __NR_utimensat (__NR_SYSCALL_BASE + 316)
#define __NR_signalfd4 (__NR_SYSCALL_BASE + 324)
#define __NR_eventfd2 (__NR_SYSCALL_BASE + 325)
#define __NR_pipe2 (__NR_SYSCALL_BASE + 328)
#define __NR_perf_event_open (__NR_SYSCALL_BASE + 333)

42
libc/include/sys/signalfd.h Normal file
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@ -0,0 +1,42 @@
/*
* Copyright (C) 2013 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _SYS_SIGNALFD_H_
#define _SYS_SIGNALFD_H_
#include <linux/signalfd.h>
#include <sys/cdefs.h>
#include <signal.h>
__BEGIN_DECLS
/* Compatibility with GLibc */
extern int signalfd(int fd, const sigset_t *mask, int flags);
__END_DECLS
#endif /* _SYS_SIGNALFD_H */

51
libc/kernel/common/linux/signalfd.h Normal file
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@ -0,0 +1,51 @@
/****************************************************************************
****************************************************************************
***
*** This header was automatically generated from a Linux kernel header
*** of the same name, to make information necessary for userspace to
*** call into the kernel available to libc. It contains only constants,
*** structures, and macros generated from the original header, and thus,
*** contains no copyrightable information.
***
*** To edit the content of this header, modify the corresponding
*** source file (e.g. under external/kernel-headers/original/) then
*** run bionic/libc/kernel/tools/update_all.py
***
*** Any manual change here will be lost the next time this script will
*** be run. You've been warned!
***
****************************************************************************
****************************************************************************/
#ifndef _LINUX_SIGNALFD_H
#define _LINUX_SIGNALFD_H
#include <linux/types.h>
#include <linux/fcntl.h>
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define SFD_CLOEXEC O_CLOEXEC
#define SFD_NONBLOCK O_NONBLOCK
struct signalfd_siginfo {
__u32 ssi_signo;
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
__s32 ssi_errno;
__s32 ssi_code;
__u32 ssi_pid;
__u32 ssi_uid;
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
__s32 ssi_fd;
__u32 ssi_tid;
__u32 ssi_band;
__u32 ssi_overrun;
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
__u32 ssi_trapno;
__s32 ssi_status;
__s32 ssi_int;
__u64 ssi_ptr;
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
__u64 ssi_utime;
__u64 ssi_stime;
__u64 ssi_addr;
__u16 ssi_addr_lsb;
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
__u8 __pad[46];
};
#endif