4d672e7ac7
This is the new timerfd API as it is implemented by the following patch:
int timerfd_create(int clockid, int flags);
int timerfd_settime(int ufd, int flags,
const struct itimerspec *utmr,
struct itimerspec *otmr);
int timerfd_gettime(int ufd, struct itimerspec *otmr);
The timerfd_create() API creates an un-programmed timerfd fd. The "clockid"
parameter can be either CLOCK_MONOTONIC or CLOCK_REALTIME.
The timerfd_settime() API give new settings by the timerfd fd, by optionally
retrieving the previous expiration time (in case the "otmr" parameter is not
NULL).
The time value specified in "utmr" is absolute, if the TFD_TIMER_ABSTIME bit
is set in the "flags" parameter. Otherwise it's a relative time.
The timerfd_gettime() API returns the next expiration time of the timer, or
{0, 0} if the timerfd has not been set yet.
Like the previous timerfd API implementation, read(2) and poll(2) are
supported (with the same interface). Here's a simple test program I used to
exercise the new timerfd APIs:
http://www.xmailserver.org/timerfd-test2.c
[akpm@linux-foundation.org: coding-style cleanups]
[akpm@linux-foundation.org: fix ia64 build]
[akpm@linux-foundation.org: fix m68k build]
[akpm@linux-foundation.org: fix mips build]
[akpm@linux-foundation.org: fix alpha, arm, blackfin, cris, m68k, s390, sparc and sparc64 builds]
[heiko.carstens@de.ibm.com: fix s390]
[akpm@linux-foundation.org: fix powerpc build]
[akpm@linux-foundation.org: fix sparc64 more]
Signed-off-by: Davide Libenzi <davidel@xmailserver.org>
Cc: Michael Kerrisk <mtk-manpages@gmx.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Davide Libenzi <davidel@xmailserver.org>
Cc: Michael Kerrisk <mtk-manpages@gmx.net>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Davide Libenzi <davidel@xmailserver.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
530 lines
12 KiB
ArmAsm
530 lines
12 KiB
ArmAsm
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1995 - 2000, 2001 by Ralf Baechle
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* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
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* Copyright (C) 2001 MIPS Technologies, Inc.
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* Copyright (C) 2004 Thiemo Seufer
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*
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* Hairy, the userspace application uses a different argument passing
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* convention than the kernel, so we have to translate things from o32
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* to ABI64 calling convention. 64-bit syscalls are also processed
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* here for now.
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*/
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#include <linux/errno.h>
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#include <asm/asm.h>
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#include <asm/asmmacro.h>
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#include <asm/irqflags.h>
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#include <asm/mipsregs.h>
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#include <asm/regdef.h>
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#include <asm/stackframe.h>
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#include <asm/thread_info.h>
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#include <asm/unistd.h>
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#include <asm/sysmips.h>
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.align 5
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NESTED(handle_sys, PT_SIZE, sp)
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.set noat
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SAVE_SOME
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TRACE_IRQS_ON_RELOAD
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STI
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.set at
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ld t1, PT_EPC(sp) # skip syscall on return
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dsubu t0, v0, __NR_O32_Linux # check syscall number
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sltiu t0, t0, __NR_O32_Linux_syscalls + 1
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daddiu t1, 4 # skip to next instruction
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sd t1, PT_EPC(sp)
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beqz t0, not_o32_scall
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#if 0
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SAVE_ALL
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move a1, v0
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PRINT("Scall %ld\n")
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RESTORE_ALL
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#endif
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/* We don't want to stumble over broken sign extensions from
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userland. O32 does never use the upper half. */
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sll a0, a0, 0
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sll a1, a1, 0
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sll a2, a2, 0
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sll a3, a3, 0
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dsll t0, v0, 3 # offset into table
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ld t2, (sys_call_table - (__NR_O32_Linux * 8))(t0)
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sd a3, PT_R26(sp) # save a3 for syscall restarting
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/*
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* More than four arguments. Try to deal with it by copying the
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* stack arguments from the user stack to the kernel stack.
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* This Sucks (TM).
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*
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* We intentionally keep the kernel stack a little below the top of
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* userspace so we don't have to do a slower byte accurate check here.
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*/
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ld t0, PT_R29(sp) # get old user stack pointer
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daddu t1, t0, 32
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bltz t1, bad_stack
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1: lw a4, 16(t0) # argument #5 from usp
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2: lw a5, 20(t0) # argument #6 from usp
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3: lw a6, 24(t0) # argument #7 from usp
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4: lw a7, 28(t0) # argument #8 from usp (for indirect syscalls)
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.section __ex_table,"a"
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PTR 1b, bad_stack
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PTR 2b, bad_stack
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PTR 3b, bad_stack
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PTR 4b, bad_stack
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.previous
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li t1, _TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT
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LONG_L t0, TI_FLAGS($28) # syscall tracing enabled?
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and t0, t1, t0
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bnez t0, trace_a_syscall
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jalr t2 # Do The Real Thing (TM)
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li t0, -EMAXERRNO - 1 # error?
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sltu t0, t0, v0
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sd t0, PT_R7(sp) # set error flag
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beqz t0, 1f
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dnegu v0 # error
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sd v0, PT_R0(sp) # flag for syscall restarting
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1: sd v0, PT_R2(sp) # result
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o32_syscall_exit:
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local_irq_disable # make need_resched and
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# signals dont change between
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# sampling and return
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LONG_L a2, TI_FLAGS($28)
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li t0, _TIF_ALLWORK_MASK
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and t0, a2, t0
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bnez t0, o32_syscall_exit_work
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j restore_partial
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o32_syscall_exit_work:
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j syscall_exit_work_partial
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/* ------------------------------------------------------------------------ */
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trace_a_syscall:
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SAVE_STATIC
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sd a4, PT_R8(sp) # Save argument registers
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sd a5, PT_R9(sp)
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sd a6, PT_R10(sp)
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sd a7, PT_R11(sp) # For indirect syscalls
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move s0, t2 # Save syscall pointer
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move a0, sp
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li a1, 0
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jal do_syscall_trace
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move t0, s0
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RESTORE_STATIC
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ld a0, PT_R4(sp) # Restore argument registers
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ld a1, PT_R5(sp)
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ld a2, PT_R6(sp)
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ld a3, PT_R7(sp)
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ld a4, PT_R8(sp)
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ld a5, PT_R9(sp)
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ld a6, PT_R10(sp)
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ld a7, PT_R11(sp) # For indirect syscalls
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jalr t0
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li t0, -EMAXERRNO - 1 # error?
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sltu t0, t0, v0
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sd t0, PT_R7(sp) # set error flag
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beqz t0, 1f
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dnegu v0 # error
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sd v0, PT_R0(sp) # set flag for syscall restarting
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1: sd v0, PT_R2(sp) # result
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j syscall_exit
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/* ------------------------------------------------------------------------ */
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/*
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* The stackpointer for a call with more than 4 arguments is bad.
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*/
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bad_stack:
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dnegu v0 # error
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sd v0, PT_R0(sp)
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sd v0, PT_R2(sp)
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li t0, 1 # set error flag
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sd t0, PT_R7(sp)
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j o32_syscall_exit
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not_o32_scall:
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/*
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* This is not an o32 compatibility syscall, pass it on
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* to the 64-bit syscall handlers.
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*/
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#ifdef CONFIG_MIPS32_N32
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j handle_sysn32
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#else
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j handle_sys64
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#endif
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END(handle_sys)
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LEAF(sys32_syscall)
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sltu v0, a0, __NR_O32_Linux + __NR_O32_Linux_syscalls + 1
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beqz v0, einval
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dsll v0, a0, 3
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ld t2, (sys_call_table - (__NR_O32_Linux * 8))(v0)
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li v1, 4000 # indirect syscall number
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beq a0, v1, einval # do not recurse
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move a0, a1 # shift argument registers
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move a1, a2
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move a2, a3
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move a3, a4
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move a4, a5
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move a5, a6
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move a6, a7
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sd a0, PT_R4(sp) # ... and push back a0 - a3, some
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sd a1, PT_R5(sp) # syscalls expect them there
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sd a2, PT_R6(sp)
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sd a3, PT_R7(sp)
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sd a3, PT_R26(sp) # update a3 for syscall restarting
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jr t2
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/* Unreached */
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einval: li v0, -EINVAL
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jr ra
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END(sys32_syscall)
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.align 3
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.type sys_call_table,@object
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sys_call_table:
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PTR sys32_syscall /* 4000 */
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PTR sys_exit
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PTR sys_fork
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PTR sys_read
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PTR sys_write
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PTR compat_sys_open /* 4005 */
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PTR sys_close
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PTR sys_waitpid
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PTR sys_creat
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PTR sys_link
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PTR sys_unlink /* 4010 */
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PTR sys32_execve
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PTR sys_chdir
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PTR compat_sys_time
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PTR sys_mknod
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PTR sys_chmod /* 4015 */
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PTR sys_lchown
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PTR sys_ni_syscall
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PTR sys_ni_syscall /* was sys_stat */
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PTR sys_lseek
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PTR sys_getpid /* 4020 */
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PTR compat_sys_mount
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PTR sys_oldumount
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PTR sys_setuid
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PTR sys_getuid
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PTR compat_sys_stime /* 4025 */
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PTR sys32_ptrace
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PTR sys_alarm
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PTR sys_ni_syscall /* was sys_fstat */
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PTR sys_pause
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PTR compat_sys_utime /* 4030 */
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PTR sys_ni_syscall
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PTR sys_ni_syscall
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PTR sys_access
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PTR sys_nice
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PTR sys_ni_syscall /* 4035 */
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PTR sys_sync
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PTR sys_kill
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PTR sys_rename
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PTR sys_mkdir
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PTR sys_rmdir /* 4040 */
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PTR sys_dup
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PTR sys_pipe
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PTR compat_sys_times
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PTR sys_ni_syscall
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PTR sys_brk /* 4045 */
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PTR sys_setgid
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PTR sys_getgid
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PTR sys_ni_syscall /* was signal 2 */
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PTR sys_geteuid
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PTR sys_getegid /* 4050 */
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PTR sys_acct
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PTR sys_umount
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PTR sys_ni_syscall
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PTR compat_sys_ioctl
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PTR compat_sys_fcntl /* 4055 */
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PTR sys_ni_syscall
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PTR sys_setpgid
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PTR sys_ni_syscall
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PTR sys_olduname
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PTR sys_umask /* 4060 */
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PTR sys_chroot
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PTR sys32_ustat
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PTR sys_dup2
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PTR sys_getppid
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PTR sys_getpgrp /* 4065 */
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PTR sys_setsid
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PTR sys32_sigaction
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PTR sys_sgetmask
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PTR sys_ssetmask
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PTR sys_setreuid /* 4070 */
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PTR sys_setregid
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PTR sys32_sigsuspend
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PTR compat_sys_sigpending
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PTR sys_sethostname
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PTR compat_sys_setrlimit /* 4075 */
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PTR compat_sys_getrlimit
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PTR compat_sys_getrusage
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PTR sys32_gettimeofday
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PTR sys32_settimeofday
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PTR sys_getgroups /* 4080 */
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PTR sys_setgroups
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PTR sys_ni_syscall /* old_select */
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PTR sys_symlink
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PTR sys_ni_syscall /* was sys_lstat */
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PTR sys_readlink /* 4085 */
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PTR sys_uselib
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PTR sys_swapon
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PTR sys_reboot
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PTR compat_sys_old_readdir
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PTR old_mmap /* 4090 */
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PTR sys_munmap
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PTR sys_truncate
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PTR sys_ftruncate
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PTR sys_fchmod
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PTR sys_fchown /* 4095 */
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PTR sys_getpriority
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PTR sys_setpriority
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PTR sys_ni_syscall
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PTR compat_sys_statfs
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PTR compat_sys_fstatfs /* 4100 */
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PTR sys_ni_syscall /* sys_ioperm */
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PTR compat_sys_socketcall
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PTR sys_syslog
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PTR compat_sys_setitimer
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PTR compat_sys_getitimer /* 4105 */
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PTR compat_sys_newstat
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PTR compat_sys_newlstat
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PTR compat_sys_newfstat
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PTR sys_uname
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PTR sys_ni_syscall /* sys_ioperm *//* 4110 */
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PTR sys_vhangup
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PTR sys_ni_syscall /* was sys_idle */
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PTR sys_ni_syscall /* sys_vm86 */
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PTR compat_sys_wait4
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PTR sys_swapoff /* 4115 */
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PTR compat_sys_sysinfo
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PTR sys32_ipc
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PTR sys_fsync
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PTR sys32_sigreturn
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PTR sys32_clone /* 4120 */
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PTR sys_setdomainname
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PTR sys32_newuname
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PTR sys_ni_syscall /* sys_modify_ldt */
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PTR compat_sys_adjtimex
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PTR sys_mprotect /* 4125 */
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PTR compat_sys_sigprocmask
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PTR sys_ni_syscall /* was creat_module */
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PTR sys_init_module
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PTR sys_delete_module
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PTR sys_ni_syscall /* 4130, get_kernel_syms */
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PTR sys_quotactl
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PTR sys_getpgid
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PTR sys_fchdir
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PTR sys_bdflush
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PTR sys_sysfs /* 4135 */
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PTR sys32_personality
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PTR sys_ni_syscall /* for afs_syscall */
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PTR sys_setfsuid
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PTR sys_setfsgid
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PTR sys32_llseek /* 4140 */
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PTR compat_sys_getdents
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PTR compat_sys_select
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PTR sys_flock
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PTR sys_msync
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PTR compat_sys_readv /* 4145 */
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PTR compat_sys_writev
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PTR sys_cacheflush
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PTR sys_cachectl
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PTR sys_sysmips
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PTR sys_ni_syscall /* 4150 */
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PTR sys_getsid
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PTR sys_fdatasync
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PTR sys32_sysctl
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PTR sys_mlock
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PTR sys_munlock /* 4155 */
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PTR sys_mlockall
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PTR sys_munlockall
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PTR sys_sched_setparam
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PTR sys_sched_getparam
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PTR sys_sched_setscheduler /* 4160 */
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PTR sys_sched_getscheduler
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PTR sys_sched_yield
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PTR sys_sched_get_priority_max
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PTR sys_sched_get_priority_min
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PTR sys32_sched_rr_get_interval /* 4165 */
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PTR compat_sys_nanosleep
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PTR sys_mremap
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PTR sys_accept
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PTR sys_bind
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PTR sys_connect /* 4170 */
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PTR sys_getpeername
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PTR sys_getsockname
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PTR sys_getsockopt
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PTR sys_listen
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PTR sys_recv /* 4175 */
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PTR sys_recvfrom
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PTR compat_sys_recvmsg
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PTR sys_send
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PTR compat_sys_sendmsg
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PTR sys_sendto /* 4180 */
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PTR compat_sys_setsockopt
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PTR sys_shutdown
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PTR sys_socket
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PTR sys_socketpair
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PTR sys_setresuid /* 4185 */
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PTR sys_getresuid
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PTR sys_ni_syscall /* was query_module */
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PTR sys_poll
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PTR compat_sys_nfsservctl
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PTR sys_setresgid /* 4190 */
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PTR sys_getresgid
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PTR sys_prctl
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PTR sys32_rt_sigreturn
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PTR sys32_rt_sigaction
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PTR sys32_rt_sigprocmask /* 4195 */
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PTR sys32_rt_sigpending
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PTR compat_sys_rt_sigtimedwait
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PTR sys32_rt_sigqueueinfo
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PTR sys32_rt_sigsuspend
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PTR sys32_pread /* 4200 */
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PTR sys32_pwrite
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PTR sys_chown
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PTR sys_getcwd
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PTR sys_capget
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PTR sys_capset /* 4205 */
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PTR sys32_sigaltstack
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PTR sys32_sendfile
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PTR sys_ni_syscall
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PTR sys_ni_syscall
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PTR sys32_mmap2 /* 4210 */
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PTR sys32_truncate64
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PTR sys32_ftruncate64
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PTR sys_newstat
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PTR sys_newlstat
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PTR sys_newfstat /* 4215 */
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PTR sys_pivot_root
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PTR sys_mincore
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PTR sys_madvise
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PTR sys_getdents64
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PTR compat_sys_fcntl64 /* 4220 */
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PTR sys_ni_syscall
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PTR sys_gettid
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PTR sys32_readahead
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PTR sys_setxattr
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PTR sys_lsetxattr /* 4225 */
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PTR sys_fsetxattr
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PTR sys_getxattr
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PTR sys_lgetxattr
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PTR sys_fgetxattr
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PTR sys_listxattr /* 4230 */
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PTR sys_llistxattr
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PTR sys_flistxattr
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PTR sys_removexattr
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PTR sys_lremovexattr
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PTR sys_fremovexattr /* 4235 */
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PTR sys_tkill
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PTR sys_sendfile64
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PTR compat_sys_futex
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PTR compat_sys_sched_setaffinity
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PTR compat_sys_sched_getaffinity /* 4240 */
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PTR sys_io_setup
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PTR sys_io_destroy
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PTR sys_io_getevents
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PTR sys_io_submit
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PTR sys_io_cancel /* 4245 */
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PTR sys_exit_group
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PTR sys_lookup_dcookie
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PTR sys_epoll_create
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PTR sys_epoll_ctl
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PTR sys_epoll_wait /* 4250 */
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PTR sys_remap_file_pages
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PTR sys_set_tid_address
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PTR sys_restart_syscall
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PTR sys32_fadvise64_64
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PTR compat_sys_statfs64 /* 4255 */
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PTR compat_sys_fstatfs64
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PTR compat_sys_timer_create
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PTR compat_sys_timer_settime
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PTR compat_sys_timer_gettime
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PTR sys_timer_getoverrun /* 4260 */
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PTR sys_timer_delete
|
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PTR compat_sys_clock_settime
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PTR compat_sys_clock_gettime
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PTR compat_sys_clock_getres
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PTR compat_sys_clock_nanosleep /* 4265 */
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PTR sys_tgkill
|
|
PTR compat_sys_utimes
|
|
PTR sys_ni_syscall /* sys_mbind */
|
|
PTR sys_ni_syscall /* sys_get_mempolicy */
|
|
PTR sys_ni_syscall /* 4270 sys_set_mempolicy */
|
|
PTR compat_sys_mq_open
|
|
PTR sys_mq_unlink
|
|
PTR compat_sys_mq_timedsend
|
|
PTR compat_sys_mq_timedreceive
|
|
PTR compat_sys_mq_notify /* 4275 */
|
|
PTR compat_sys_mq_getsetattr
|
|
PTR sys_ni_syscall /* sys_vserver */
|
|
PTR sys32_waitid
|
|
PTR sys_ni_syscall /* available, was setaltroot */
|
|
PTR sys_add_key /* 4280 */
|
|
PTR sys_request_key
|
|
PTR sys_keyctl
|
|
PTR sys_set_thread_area
|
|
PTR sys_inotify_init
|
|
PTR sys_inotify_add_watch /* 4285 */
|
|
PTR sys_inotify_rm_watch
|
|
PTR sys_migrate_pages
|
|
PTR compat_sys_openat
|
|
PTR sys_mkdirat
|
|
PTR sys_mknodat /* 4290 */
|
|
PTR sys_fchownat
|
|
PTR compat_sys_futimesat
|
|
PTR sys_newfstatat
|
|
PTR sys_unlinkat
|
|
PTR sys_renameat /* 4295 */
|
|
PTR sys_linkat
|
|
PTR sys_symlinkat
|
|
PTR sys_readlinkat
|
|
PTR sys_fchmodat
|
|
PTR sys_faccessat /* 4300 */
|
|
PTR compat_sys_pselect6
|
|
PTR sys_ppoll
|
|
PTR sys_unshare
|
|
PTR sys_splice
|
|
PTR sys32_sync_file_range /* 4305 */
|
|
PTR sys_tee
|
|
PTR sys_vmsplice
|
|
PTR compat_sys_move_pages
|
|
PTR compat_sys_set_robust_list
|
|
PTR compat_sys_get_robust_list /* 4310 */
|
|
PTR compat_sys_kexec_load
|
|
PTR sys_getcpu
|
|
PTR compat_sys_epoll_pwait
|
|
PTR sys_ioprio_set
|
|
PTR sys_ioprio_get /* 4315 */
|
|
PTR compat_sys_utimensat
|
|
PTR compat_sys_signalfd
|
|
PTR sys_ni_syscall
|
|
PTR sys_eventfd
|
|
PTR sys32_fallocate /* 4320 */
|
|
.size sys_call_table,.-sys_call_table
|