syscall.s

该文件是rt_linux

	ldo	R%tracesys_sigexit(%r2),%r2

tracesys_sigexit:
	ldo     -TASK_SZ_ALGN-FRAME_SIZE(%r30),%r1      /* get task ptr */
#ifdef __LP64__
	ldo	-16(%r30),%r29			/* Reference param save area */
#endif
	bl	syscall_trace, %r2
	nop

	ldil	L%syscall_exit_rfi,%r1
	be,n	R%syscall_exit_rfi(%sr7,%r1)

#ifdef __LP64__
/* Use ENTRY_SAME for 32-bit syscalls which are the same on wide and
 * narrow palinux.  Use ENTRY_DIFF for those where a 32-bit specific
 * implementation is required on wide palinux.
 */
#define ENTRY_SAME(_name_) .dword sys_/**/_name_
#define ENTRY_DIFF(_name_) .dword sys32_/**/_name_
#define ENTRY_UHOH(_name_) .dword sys32_/**/unimplemented
#else
#define ENTRY_SAME(_name_) .word sys_/**/_name_
#define ENTRY_DIFF(_name_) .word sys_/**/_name_
#define ENTRY_UHOH(_name_) .word sys_/**/_name_
#endif

	.align 8
	.export sys_call_table
.Lsys_call_table:
sys_call_table:
	ENTRY_SAME(ni_syscall)	/* 0  -  old "setup()" system call*/
	ENTRY_SAME(exit)
	ENTRY_SAME(fork_wrapper)
	ENTRY_SAME(read)
	ENTRY_SAME(write)
	ENTRY_SAME(open)		/* 5 */
	ENTRY_SAME(close)
	ENTRY_SAME(waitpid)
	ENTRY_SAME(creat)
	ENTRY_SAME(link)
	ENTRY_SAME(unlink)		/* 10 */
	ENTRY_DIFF(execve_wrapper)
	ENTRY_SAME(chdir)
	/* See comments in kernel/time.c!!! Maybe we don't need this? */
	ENTRY_DIFF(time)
	ENTRY_SAME(mknod)
	ENTRY_SAME(chmod)		/* 15 */
	ENTRY_SAME(lchown)
	ENTRY_SAME(socket)
	/* struct stat is MAYBE identical wide and narrow ?? */
	ENTRY_DIFF(newstat)
	ENTRY_DIFF(lseek)
	ENTRY_SAME(getpid)		/* 20 */
	/* the 'void * data' parameter may need re-packing in wide */
	ENTRY_DIFF(mount)
	/* concerned about struct sockaddr in wide/narrow */
	/* ---> I think sockaddr is OK unless the compiler packs the struct */
	/*      differently to align the char array */
	ENTRY_SAME(bind)
	ENTRY_SAME(setuid)
	ENTRY_SAME(getuid)
	ENTRY_SAME(stime)		/* 25 */
	ENTRY_SAME(ptrace)
	ENTRY_SAME(alarm)
	/* see stat comment */
	ENTRY_DIFF(newfstat)
	ENTRY_SAME(pause)
	/* struct utimbuf uses time_t which might vary */
	ENTRY_DIFF(utime)		/* 30 */
	/* struct sockaddr... */
	ENTRY_SAME(connect)
	ENTRY_SAME(listen)
	ENTRY_SAME(access)
	ENTRY_SAME(nice)
	/* struct sockaddr... */
	ENTRY_SAME(accept)		/* 35 */
	ENTRY_SAME(sync)
	ENTRY_SAME(kill)
	ENTRY_SAME(rename)
	ENTRY_SAME(mkdir)
	ENTRY_SAME(rmdir)		/* 40 */
	ENTRY_SAME(dup)
	ENTRY_SAME(pipe)
	ENTRY_DIFF(times)
	/* struct sockaddr... */
	ENTRY_SAME(getsockname)
	/* it seems possible brk() could return a >4G pointer... */
	ENTRY_SAME(brk)		/* 45 */
	ENTRY_SAME(setgid)
	ENTRY_SAME(getgid)
	ENTRY_SAME(signal)
	ENTRY_SAME(geteuid)
	ENTRY_SAME(getegid)		/* 50 */
	ENTRY_SAME(acct)
	ENTRY_SAME(umount)
	/* struct sockaddr... */
	ENTRY_SAME(getpeername)
	/* This one's a huge ugly mess */
	ENTRY_DIFF(ioctl)
	/* struct flock? */
	ENTRY_DIFF(fcntl)		/* 55 */
	ENTRY_SAME(socketpair)
	ENTRY_SAME(setpgid)
	ENTRY_SAME(send)
	ENTRY_SAME(newuname)
	ENTRY_SAME(umask)		/* 60 */
	ENTRY_SAME(chroot)
	ENTRY_SAME(ustat)
	ENTRY_SAME(dup2)
	ENTRY_SAME(getppid)
	ENTRY_SAME(getpgrp)		/* 65 */
	ENTRY_SAME(setsid)
	ENTRY_SAME(pivot_root)
	/* I don't like this */
	ENTRY_UHOH(sgetmask)
	ENTRY_UHOH(ssetmask)
	ENTRY_SAME(setreuid)	/* 70 */
	ENTRY_SAME(setregid)
	ENTRY_SAME(mincore)
	ENTRY_DIFF(sigpending)
	ENTRY_SAME(sethostname)
	/* Following 3 have linux-common-code structs containing longs -( */
	ENTRY_DIFF(setrlimit)	/* 75 */
	ENTRY_DIFF(getrlimit)
	ENTRY_DIFF(getrusage)
	/* struct timeval and timezone are maybe?? consistent wide and narrow */
	ENTRY_DIFF(gettimeofday)
	ENTRY_DIFF(settimeofday)
	ENTRY_SAME(getgroups)	/* 80 */
	ENTRY_SAME(setgroups)
	/* struct socketaddr... */
	ENTRY_SAME(sendto)
	ENTRY_SAME(symlink)
	/* see stat comment */
	ENTRY_DIFF(newlstat)
	ENTRY_SAME(readlink)	/* 85 */
	/* suspect we'll need some work for narrow shlibs on wide kernel */
	/* NOTE this doesn't get used when I boot 32-bit userspace */
	/* containing working shlib apps -- can this be nuked? */
	ENTRY_UHOH(uselib)
	ENTRY_SAME(swapon)
	ENTRY_SAME(reboot)
	ENTRY_SAME(mmap2)
	ENTRY_SAME(mmap)		/* 90 */
	ENTRY_SAME(munmap)
	ENTRY_SAME(truncate)
	ENTRY_SAME(ftruncate)
	ENTRY_SAME(fchmod)
	ENTRY_SAME(fchown)		/* 95 */
	ENTRY_SAME(getpriority)
	ENTRY_SAME(setpriority)
	ENTRY_SAME(recv)
	ENTRY_DIFF(statfs)
	ENTRY_DIFF(fstatfs)		/* 100 */
	ENTRY_SAME(stat64)
	/* don't think hppa glibc even provides an entry pt for this
	 * so disable for now */
	ENTRY_UHOH(socketcall)
	ENTRY_SAME(syslog)
	/* even though manpage says struct timeval contains longs, ours has
	 * time_t and suseconds_t -- both of which are safe wide/narrow */
	ENTRY_DIFF(setitimer)
	ENTRY_DIFF(getitimer)	/* 105 */
	ENTRY_SAME(capget)
	ENTRY_SAME(capset)
	ENTRY_DIFF(pread)
	ENTRY_DIFF(pwrite)
	ENTRY_SAME(getcwd)		/* 110 */
	ENTRY_SAME(vhangup)
	ENTRY_SAME(fstat64)
	ENTRY_SAME(vfork_wrapper)
	/* struct rusage contains longs... */
	ENTRY_DIFF(wait4)
	ENTRY_SAME(swapoff)		/* 115 */
	ENTRY_DIFF(sysinfo)
	ENTRY_SAME(shutdown)
	ENTRY_SAME(fsync)
	ENTRY_SAME(madvise)
	ENTRY_SAME(clone_wrapper)	/* 120 */
	ENTRY_SAME(setdomainname)
	ENTRY_SAME(sendfile)
	/* struct sockaddr... */
	ENTRY_SAME(recvfrom)
	/* struct timex contains longs */
	ENTRY_DIFF(adjtimex)
	ENTRY_SAME(mprotect)	/* 125 */
	/* old_sigset_t forced to 32 bits.  Beware glibc sigset_t */
	ENTRY_DIFF(sigprocmask)
	ENTRY_SAME(create_module)
	/* struct module contains longs, but insmod builds a 64 bit struct
	 * if running under a 64 bit kernel */
	ENTRY_SAME(init_module)
	ENTRY_SAME(delete_module)
	/* struct kernel_sym contains a long. Linus never heard of size_t? */
	ENTRY_DIFF(get_kernel_syms)	/* 130 */
	/* time_t inside struct dqblk */
	ENTRY_DIFF(quotactl)
	ENTRY_SAME(getpgid)
	ENTRY_SAME(fchdir)
	ENTRY_SAME(bdflush)
	ENTRY_SAME(sysfs)		/* 135 */
	ENTRY_SAME(personality)
	ENTRY_SAME(ni_syscall)	/* for afs_syscall */
	ENTRY_SAME(setfsuid)
	ENTRY_SAME(setfsgid)
	/* I think this might work */
	ENTRY_SAME(llseek)		/* 140 */
	/* struct linux_dirent has longs, like 'unsigned long d_ino' which
	 * almost definitely should be 'ino_t d_ino' but it's too late now */
	ENTRY_DIFF(getdents)
	/* it is POSSIBLE that select will be OK because even though fd_set
	 * contains longs, the macros and sizes are clever. */
	ENTRY_DIFF(select)
	ENTRY_SAME(flock)
	ENTRY_SAME(msync)
	/* struct iovec contains pointers */
	ENTRY_DIFF(readv)		/* 145 */
	ENTRY_DIFF(writev)
	ENTRY_SAME(getsid)
	ENTRY_SAME(fdatasync)
	/* struct __sysctl_args is a mess */
	ENTRY_DIFF(sysctl)
	ENTRY_SAME(mlock)		/* 150 */
	ENTRY_SAME(munlock)
	ENTRY_SAME(mlockall)
	ENTRY_SAME(munlockall)
	/* struct sched_param is ok for now */
	ENTRY_SAME(sched_setparam)
	ENTRY_SAME(sched_getparam)	/* 155 */
	ENTRY_SAME(sched_setscheduler)
	ENTRY_SAME(sched_getscheduler)
	ENTRY_SAME(sched_yield)
	ENTRY_SAME(sched_get_priority_max)
	ENTRY_SAME(sched_get_priority_min)	/* 160 */
	/* These 2 would've worked if someone had defined struct timespec
	 * carefully, like timeval for example (which is about the same).
	 * Unfortunately it contains a long :-( */
	ENTRY_DIFF(sched_rr_get_interval)
	ENTRY_DIFF(nanosleep)
	ENTRY_SAME(mremap)
	ENTRY_SAME(setresuid)
	ENTRY_SAME(getresuid)	/* 165 */
	ENTRY_DIFF(sigaltstack_wrapper)
	/* struct passed back to user can contain long symbol values */
	ENTRY_DIFF(query_module)
	ENTRY_SAME(poll)
	/* structs contain pointers and an in_addr... */
	ENTRY_DIFF(nfsservctl)
	ENTRY_SAME(setresgid)	/* 170 */
	ENTRY_SAME(getresgid)
	ENTRY_SAME(prctl)
	/* signals need a careful review */
	ENTRY_SAME(rt_sigreturn_wrapper)
	ENTRY_DIFF(rt_sigaction)
	ENTRY_DIFF(rt_sigprocmask)	/* 175 */
	ENTRY_DIFF(rt_sigpending)
	ENTRY_UHOH(rt_sigtimedwait)
	/* even though the struct siginfo_t is different, it appears like
	 * all the paths use values which should be same wide and narrow.
	 * Also the struct is padded to 128 bytes which means we don't have
	 * to worry about faulting trying to copy in a larger 64-bit
	 * struct from a 32-bit user-space app.
	 */
	ENTRY_SAME(rt_sigqueueinfo)
	ENTRY_SAME(rt_sigsuspend_wrapper) /* not really SAME -- see the code */
	ENTRY_SAME(chown)		/* 180 */
	/* setsockopt() used by iptables: SO_SET_REPLACE/SO_SET_ADD_COUNTERS */
	ENTRY_DIFF(setsockopt)
	ENTRY_SAME(getsockopt)
	ENTRY_DIFF(sendmsg)
	ENTRY_DIFF(recvmsg)
	ENTRY_SAME(semop)		/* 185 */
	ENTRY_SAME(semget)
	ENTRY_DIFF(semctl_broken)
	ENTRY_DIFF(msgsnd)
	ENTRY_DIFF(msgrcv)
	ENTRY_SAME(msgget)		/* 190 */
	ENTRY_SAME(msgctl_broken)
	ENTRY_SAME(shmat_wrapper)
	ENTRY_SAME(shmdt)
	ENTRY_SAME(shmget)
	ENTRY_SAME(shmctl_broken)		/* 195 */
	ENTRY_SAME(ni_syscall)		/* streams1 */
	ENTRY_SAME(ni_syscall)		/* streams2 */
	ENTRY_SAME(lstat64)
	ENTRY_DIFF(truncate64)
	ENTRY_DIFF(ftruncate64)	/* 200 */
	ENTRY_SAME(getdents64)
	ENTRY_DIFF(fcntl64)
	ENTRY_SAME(ni_syscall)		/* attrctl */
	ENTRY_SAME(ni_syscall)		/* acl_get */
	ENTRY_SAME(ni_syscall)		/* acl_set */
	ENTRY_SAME(gettid)
	ENTRY_SAME(readahead)          

.end

	/* Make sure nothing else is placed on this page */

	.align 4096
	.export end_linux_gateway_page
end_linux_gateway_page: