linux/arch/powerpc/kernel/systbl.S

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/*
* This file contains the table of syscall-handling functions.
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
*
* Largely rewritten by Cort Dougan (cort@cs.nmt.edu)
* and Paul Mackerras.
*
* Adapted for iSeries by Mike Corrigan (mikejc@us.ibm.com)
* PPC64 updates by Dave Engebretsen (engebret@us.ibm.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/config.h>
#include <asm/ppc_asm.h>
#ifdef CONFIG_PPC64
#define SYSCALL(func) .llong .sys_##func,.sys_##func
#define COMPAT_SYS(func) .llong .sys_##func,.compat_sys_##func
#define PPC_SYS(func) .llong .ppc_##func,.ppc_##func
#define OLDSYS(func) .llong .sys_ni_syscall,.sys_ni_syscall
#define SYS32ONLY(func) .llong .sys_ni_syscall,.compat_sys_##func
#define SYSX(f, f3264, f32) .llong .f,.f3264
#else
#define SYSCALL(func) .long sys_##func
#define COMPAT_SYS(func) .long sys_##func
#define PPC_SYS(func) .long ppc_##func
#define OLDSYS(func) .long sys_##func
#define SYS32ONLY(func) .long sys_##func
#define SYSX(f, f3264, f32) .long f32
#endif
#ifdef CONFIG_PPC64
#define sys_sigpending sys_ni_syscall
#define sys_old_getrlimit sys_ni_syscall
#endif
_GLOBAL(sys_call_table)
SYSCALL(restart_syscall)
SYSCALL(exit)
PPC_SYS(fork)
SYSCALL(read)
SYSCALL(write)
COMPAT_SYS(open)
SYSCALL(close)
COMPAT_SYS(waitpid)
COMPAT_SYS(creat)
SYSCALL(link)
SYSCALL(unlink)
COMPAT_SYS(execve)
SYSCALL(chdir)
COMPAT_SYS(time)
SYSCALL(mknod)
SYSCALL(chmod)
SYSCALL(lchown)
SYSCALL(ni_syscall)
OLDSYS(stat)
SYSX(sys_lseek,ppc32_lseek,sys_lseek)
SYSCALL(getpid)
COMPAT_SYS(mount)
SYSX(sys_ni_syscall,sys_oldumount,sys_oldumount)
SYSCALL(setuid)
SYSCALL(getuid)
COMPAT_SYS(stime)
COMPAT_SYS(ptrace)
SYSCALL(alarm)
OLDSYS(fstat)
COMPAT_SYS(pause)
COMPAT_SYS(utime)
SYSCALL(ni_syscall)
SYSCALL(ni_syscall)
COMPAT_SYS(access)
COMPAT_SYS(nice)
SYSCALL(ni_syscall)
SYSCALL(sync)
COMPAT_SYS(kill)
SYSCALL(rename)
COMPAT_SYS(mkdir)
SYSCALL(rmdir)
SYSCALL(dup)
SYSCALL(pipe)
COMPAT_SYS(times)
SYSCALL(ni_syscall)
SYSCALL(brk)
SYSCALL(setgid)
SYSCALL(getgid)
SYSCALL(signal)
SYSCALL(geteuid)
SYSCALL(getegid)
SYSCALL(acct)
SYSCALL(umount)
SYSCALL(ni_syscall)
COMPAT_SYS(ioctl)
COMPAT_SYS(fcntl)
SYSCALL(ni_syscall)
COMPAT_SYS(setpgid)
SYSCALL(ni_syscall)
SYSX(sys_ni_syscall,sys_olduname, sys_olduname)
COMPAT_SYS(umask)
SYSCALL(chroot)
SYSCALL(ustat)
SYSCALL(dup2)
SYSCALL(getppid)
SYSCALL(getpgrp)
SYSCALL(setsid)
SYS32ONLY(sigaction)
SYSCALL(sgetmask)
COMPAT_SYS(ssetmask)
SYSCALL(setreuid)
SYSCALL(setregid)
[PATCH] syscall entry/exit revamp This cleanup patch speeds up the null syscall path on ppc64 by about 3%, and brings the ppc32 and ppc64 code slightly closer together. The ppc64 code was checking current_thread_info()->flags twice in the syscall exit path; once for TIF_SYSCALL_T_OR_A before disabling interrupts, and then again for TIF_SIGPENDING|TIF_NEED_RESCHED etc after disabling interrupts. Now we do the same as ppc32 -- check the flags only once in the fast path, and re-enable interrupts if necessary in the ptrace case. The patch abolishes the 'syscall_noerror' member of struct thread_info and replaces it with a TIF_NOERROR bit in the flags, which is handled in the slow path. This shortens the syscall entry code, which no longer needs to clear syscall_noerror. The patch adds a TIF_SAVE_NVGPRS flag which causes the syscall exit slow path to save the non-volatile GPRs into a signal frame. This removes the need for the assembly wrappers around sys_sigsuspend(), sys_rt_sigsuspend(), et al which existed solely to save those registers in advance. It also means I don't have to add new wrappers for ppoll() and pselect(), which is what I was supposed to be doing when I got distracted into this... Finally, it unifies the ppc64 and ppc32 methods of handling syscall exit directly into a signal handler (as required by sigsuspend et al) by introducing a TIF_RESTOREALL flag which causes _all_ the registers to be reloaded from the pt_regs by taking the ret_from_exception path, instead of the normal syscall exit path which stomps on the callee-saved GPRs. It appears to pass an LTP test run on ppc64, and passes basic testing on ppc32 too. Brief tests of ptrace functionality with strace and gdb also appear OK. I wouldn't send it to Linus for 2.6.15 just yet though :) Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-11-16 02:52:18 +08:00
SYS32ONLY(sigsuspend)
COMPAT_SYS(sigpending)
COMPAT_SYS(sethostname)
COMPAT_SYS(setrlimit)
COMPAT_SYS(old_getrlimit)
COMPAT_SYS(getrusage)
COMPAT_SYS(gettimeofday)
COMPAT_SYS(settimeofday)
COMPAT_SYS(getgroups)
COMPAT_SYS(setgroups)
SYSX(sys_ni_syscall,sys_ni_syscall,ppc_select)
SYSCALL(symlink)
OLDSYS(lstat)
COMPAT_SYS(readlink)
SYSCALL(uselib)
SYSCALL(swapon)
SYSCALL(reboot)
SYSX(sys_ni_syscall,old32_readdir,old_readdir)
SYSCALL(mmap)
SYSCALL(munmap)
SYSCALL(truncate)
SYSCALL(ftruncate)
SYSCALL(fchmod)
SYSCALL(fchown)
COMPAT_SYS(getpriority)
COMPAT_SYS(setpriority)
SYSCALL(ni_syscall)
COMPAT_SYS(statfs)
COMPAT_SYS(fstatfs)
SYSCALL(ni_syscall)
COMPAT_SYS(socketcall)
COMPAT_SYS(syslog)
COMPAT_SYS(setitimer)
COMPAT_SYS(getitimer)
COMPAT_SYS(newstat)
COMPAT_SYS(newlstat)
COMPAT_SYS(newfstat)
SYSX(sys_ni_syscall,sys_uname,sys_uname)
SYSCALL(ni_syscall)
SYSCALL(vhangup)
SYSCALL(ni_syscall)
SYSCALL(ni_syscall)
COMPAT_SYS(wait4)
SYSCALL(swapoff)
COMPAT_SYS(sysinfo)
COMPAT_SYS(ipc)
SYSCALL(fsync)
[PATCH] syscall entry/exit revamp This cleanup patch speeds up the null syscall path on ppc64 by about 3%, and brings the ppc32 and ppc64 code slightly closer together. The ppc64 code was checking current_thread_info()->flags twice in the syscall exit path; once for TIF_SYSCALL_T_OR_A before disabling interrupts, and then again for TIF_SIGPENDING|TIF_NEED_RESCHED etc after disabling interrupts. Now we do the same as ppc32 -- check the flags only once in the fast path, and re-enable interrupts if necessary in the ptrace case. The patch abolishes the 'syscall_noerror' member of struct thread_info and replaces it with a TIF_NOERROR bit in the flags, which is handled in the slow path. This shortens the syscall entry code, which no longer needs to clear syscall_noerror. The patch adds a TIF_SAVE_NVGPRS flag which causes the syscall exit slow path to save the non-volatile GPRs into a signal frame. This removes the need for the assembly wrappers around sys_sigsuspend(), sys_rt_sigsuspend(), et al which existed solely to save those registers in advance. It also means I don't have to add new wrappers for ppoll() and pselect(), which is what I was supposed to be doing when I got distracted into this... Finally, it unifies the ppc64 and ppc32 methods of handling syscall exit directly into a signal handler (as required by sigsuspend et al) by introducing a TIF_RESTOREALL flag which causes _all_ the registers to be reloaded from the pt_regs by taking the ret_from_exception path, instead of the normal syscall exit path which stomps on the callee-saved GPRs. It appears to pass an LTP test run on ppc64, and passes basic testing on ppc32 too. Brief tests of ptrace functionality with strace and gdb also appear OK. I wouldn't send it to Linus for 2.6.15 just yet though :) Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-11-16 02:52:18 +08:00
SYS32ONLY(sigreturn)
PPC_SYS(clone)
COMPAT_SYS(setdomainname)
PPC_SYS(newuname)
SYSCALL(ni_syscall)
COMPAT_SYS(adjtimex)
SYSCALL(mprotect)
SYSX(sys_ni_syscall,compat_sys_sigprocmask,sys_sigprocmask)
SYSCALL(ni_syscall)
SYSCALL(init_module)
SYSCALL(delete_module)
SYSCALL(ni_syscall)
SYSCALL(quotactl)
COMPAT_SYS(getpgid)
SYSCALL(fchdir)
SYSCALL(bdflush)
COMPAT_SYS(sysfs)
SYSX(ppc64_personality,ppc64_personality,sys_personality)
SYSCALL(ni_syscall)
SYSCALL(setfsuid)
SYSCALL(setfsgid)
SYSCALL(llseek)
COMPAT_SYS(getdents)
SYSX(sys_select,ppc32_select,ppc_select)
SYSCALL(flock)
SYSCALL(msync)
COMPAT_SYS(readv)
COMPAT_SYS(writev)
COMPAT_SYS(getsid)
SYSCALL(fdatasync)
COMPAT_SYS(sysctl)
SYSCALL(mlock)
SYSCALL(munlock)
SYSCALL(mlockall)
SYSCALL(munlockall)
COMPAT_SYS(sched_setparam)
COMPAT_SYS(sched_getparam)
COMPAT_SYS(sched_setscheduler)
COMPAT_SYS(sched_getscheduler)
SYSCALL(sched_yield)
COMPAT_SYS(sched_get_priority_max)
COMPAT_SYS(sched_get_priority_min)
COMPAT_SYS(sched_rr_get_interval)
COMPAT_SYS(nanosleep)
SYSCALL(mremap)
SYSCALL(setresuid)
SYSCALL(getresuid)
SYSCALL(ni_syscall)
SYSCALL(poll)
COMPAT_SYS(nfsservctl)
SYSCALL(setresgid)
SYSCALL(getresgid)
COMPAT_SYS(prctl)
[PATCH] syscall entry/exit revamp This cleanup patch speeds up the null syscall path on ppc64 by about 3%, and brings the ppc32 and ppc64 code slightly closer together. The ppc64 code was checking current_thread_info()->flags twice in the syscall exit path; once for TIF_SYSCALL_T_OR_A before disabling interrupts, and then again for TIF_SIGPENDING|TIF_NEED_RESCHED etc after disabling interrupts. Now we do the same as ppc32 -- check the flags only once in the fast path, and re-enable interrupts if necessary in the ptrace case. The patch abolishes the 'syscall_noerror' member of struct thread_info and replaces it with a TIF_NOERROR bit in the flags, which is handled in the slow path. This shortens the syscall entry code, which no longer needs to clear syscall_noerror. The patch adds a TIF_SAVE_NVGPRS flag which causes the syscall exit slow path to save the non-volatile GPRs into a signal frame. This removes the need for the assembly wrappers around sys_sigsuspend(), sys_rt_sigsuspend(), et al which existed solely to save those registers in advance. It also means I don't have to add new wrappers for ppoll() and pselect(), which is what I was supposed to be doing when I got distracted into this... Finally, it unifies the ppc64 and ppc32 methods of handling syscall exit directly into a signal handler (as required by sigsuspend et al) by introducing a TIF_RESTOREALL flag which causes _all_ the registers to be reloaded from the pt_regs by taking the ret_from_exception path, instead of the normal syscall exit path which stomps on the callee-saved GPRs. It appears to pass an LTP test run on ppc64, and passes basic testing on ppc32 too. Brief tests of ptrace functionality with strace and gdb also appear OK. I wouldn't send it to Linus for 2.6.15 just yet though :) Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-11-16 02:52:18 +08:00
COMPAT_SYS(rt_sigreturn)
COMPAT_SYS(rt_sigaction)
COMPAT_SYS(rt_sigprocmask)
COMPAT_SYS(rt_sigpending)
COMPAT_SYS(rt_sigtimedwait)
COMPAT_SYS(rt_sigqueueinfo)
[PATCH] syscall entry/exit revamp This cleanup patch speeds up the null syscall path on ppc64 by about 3%, and brings the ppc32 and ppc64 code slightly closer together. The ppc64 code was checking current_thread_info()->flags twice in the syscall exit path; once for TIF_SYSCALL_T_OR_A before disabling interrupts, and then again for TIF_SIGPENDING|TIF_NEED_RESCHED etc after disabling interrupts. Now we do the same as ppc32 -- check the flags only once in the fast path, and re-enable interrupts if necessary in the ptrace case. The patch abolishes the 'syscall_noerror' member of struct thread_info and replaces it with a TIF_NOERROR bit in the flags, which is handled in the slow path. This shortens the syscall entry code, which no longer needs to clear syscall_noerror. The patch adds a TIF_SAVE_NVGPRS flag which causes the syscall exit slow path to save the non-volatile GPRs into a signal frame. This removes the need for the assembly wrappers around sys_sigsuspend(), sys_rt_sigsuspend(), et al which existed solely to save those registers in advance. It also means I don't have to add new wrappers for ppoll() and pselect(), which is what I was supposed to be doing when I got distracted into this... Finally, it unifies the ppc64 and ppc32 methods of handling syscall exit directly into a signal handler (as required by sigsuspend et al) by introducing a TIF_RESTOREALL flag which causes _all_ the registers to be reloaded from the pt_regs by taking the ret_from_exception path, instead of the normal syscall exit path which stomps on the callee-saved GPRs. It appears to pass an LTP test run on ppc64, and passes basic testing on ppc32 too. Brief tests of ptrace functionality with strace and gdb also appear OK. I wouldn't send it to Linus for 2.6.15 just yet though :) Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-11-16 02:52:18 +08:00
COMPAT_SYS(rt_sigsuspend)
COMPAT_SYS(pread64)
COMPAT_SYS(pwrite64)
SYSCALL(chown)
SYSCALL(getcwd)
SYSCALL(capget)
SYSCALL(capset)
COMPAT_SYS(sigaltstack)
SYSX(sys_sendfile64,compat_sys_sendfile,sys_sendfile)
SYSCALL(ni_syscall)
SYSCALL(ni_syscall)
PPC_SYS(vfork)
COMPAT_SYS(getrlimit)
COMPAT_SYS(readahead)
SYS32ONLY(mmap2)
SYS32ONLY(truncate64)
SYS32ONLY(ftruncate64)
SYSX(sys_ni_syscall,sys_stat64,sys_stat64)
SYSX(sys_ni_syscall,sys_lstat64,sys_lstat64)
SYSX(sys_ni_syscall,sys_fstat64,sys_fstat64)
SYSCALL(pciconfig_read)
SYSCALL(pciconfig_write)
SYSCALL(pciconfig_iobase)
SYSCALL(ni_syscall)
SYSCALL(getdents64)
SYSCALL(pivot_root)
SYSX(sys_ni_syscall,compat_sys_fcntl64,sys_fcntl64)
SYSCALL(madvise)
SYSCALL(mincore)
SYSCALL(gettid)
SYSCALL(tkill)
SYSCALL(setxattr)
SYSCALL(lsetxattr)
SYSCALL(fsetxattr)
SYSCALL(getxattr)
SYSCALL(lgetxattr)
SYSCALL(fgetxattr)
SYSCALL(listxattr)
SYSCALL(llistxattr)
SYSCALL(flistxattr)
SYSCALL(removexattr)
SYSCALL(lremovexattr)
SYSCALL(fremovexattr)
COMPAT_SYS(futex)
COMPAT_SYS(sched_setaffinity)
COMPAT_SYS(sched_getaffinity)
SYSCALL(ni_syscall)
SYSCALL(ni_syscall)
SYS32ONLY(sendfile64)
COMPAT_SYS(io_setup)
SYSCALL(io_destroy)
COMPAT_SYS(io_getevents)
COMPAT_SYS(io_submit)
SYSCALL(io_cancel)
SYSCALL(set_tid_address)
SYSX(sys_fadvise64,ppc32_fadvise64,sys_fadvise64)
SYSCALL(exit_group)
SYSX(sys_lookup_dcookie,ppc32_lookup_dcookie,sys_lookup_dcookie)
SYSCALL(epoll_create)
SYSCALL(epoll_ctl)
SYSCALL(epoll_wait)
SYSCALL(remap_file_pages)
SYSX(sys_timer_create,compat_sys_timer_create,sys_timer_create)
COMPAT_SYS(timer_settime)
COMPAT_SYS(timer_gettime)
SYSCALL(timer_getoverrun)
SYSCALL(timer_delete)
COMPAT_SYS(clock_settime)
COMPAT_SYS(clock_gettime)
COMPAT_SYS(clock_getres)
COMPAT_SYS(clock_nanosleep)
powerpc: Fix various syscall/signal/swapcontext bugs A careful reading of the recent changes to the system call entry/exit paths revealed several problems, plus some things that could be simplified and improved: * 32-bit wasn't testing the _TIF_NOERROR bit in the syscall fast exit path, so it was only doing anything with it once it saw some other bit being set. In other words, the noerror behaviour would apply to the next system call where we had to reschedule or deliver a signal, which is not necessarily the current system call. * 32-bit wasn't doing the call to ptrace_notify in the syscall exit path when the _TIF_SINGLESTEP bit was set. * _TIF_RESTOREALL was in both _TIF_USER_WORK_MASK and _TIF_PERSYSCALL_MASK, which is odd since _TIF_RESTOREALL is only set by system calls. I took it out of _TIF_USER_WORK_MASK. * On 64-bit, _TIF_RESTOREALL wasn't causing the non-volatile registers to be restored (unless perhaps a signal was delivered or the syscall was traced or single-stepped). Thus the non-volatile registers weren't restored on exit from a signal handler. We probably got away with it mostly because signal handlers written in C wouldn't alter the non-volatile registers. * On 32-bit I simplified the code and made it more like 64-bit by making the syscall exit path jump to ret_from_except to handle preemption and signal delivery. * 32-bit was calling do_signal unnecessarily when _TIF_RESTOREALL was set - but I think because of that 32-bit was actually restoring the non-volatile registers on exit from a signal handler. * I changed the order of enabling interrupts and saving the non-volatile registers before calling do_syscall_trace_leave; now we enable interrupts first. Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-08 10:24:22 +08:00
SYSX(ppc64_swapcontext,ppc32_swapcontext,ppc_swapcontext)
COMPAT_SYS(tgkill)
COMPAT_SYS(utimes)
COMPAT_SYS(statfs64)
COMPAT_SYS(fstatfs64)
SYSX(sys_ni_syscall, ppc_fadvise64_64, ppc_fadvise64_64)
PPC_SYS(rtas)
OLDSYS(debug_setcontext)
SYSCALL(ni_syscall)
SYSCALL(ni_syscall)
COMPAT_SYS(mbind)
COMPAT_SYS(get_mempolicy)
COMPAT_SYS(set_mempolicy)
COMPAT_SYS(mq_open)
SYSCALL(mq_unlink)
COMPAT_SYS(mq_timedsend)
COMPAT_SYS(mq_timedreceive)
COMPAT_SYS(mq_notify)
COMPAT_SYS(mq_getsetattr)
COMPAT_SYS(kexec_load)
COMPAT_SYS(add_key)
COMPAT_SYS(request_key)
COMPAT_SYS(keyctl)
COMPAT_SYS(waitid)
COMPAT_SYS(ioprio_set)
COMPAT_SYS(ioprio_get)
SYSCALL(inotify_init)
SYSCALL(inotify_add_watch)
SYSCALL(inotify_rm_watch)
SYSCALL(spu_run)
SYSCALL(spu_create)
COMPAT_SYS(pselect6)
COMPAT_SYS(ppoll)
SYSCALL(unshare)