diff options
Diffstat (limited to 'kernel/entry')
| -rw-r--r-- | kernel/entry/common.c | 41 |
1 files changed, 33 insertions, 8 deletions
diff --git a/kernel/entry/common.c b/kernel/entry/common.c index fcae019158ca..6fdb6105e6d6 100644 --- a/kernel/entry/common.c +++ b/kernel/entry/common.c @@ -60,31 +60,56 @@ static long syscall_trace_enter(struct pt_regs *regs, long syscall, return ret; } + /* Either of the above might have changed the syscall number */ + syscall = syscall_get_nr(current, regs); + if (unlikely(ti_work & _TIF_SYSCALL_TRACEPOINT)) trace_sys_enter(regs, syscall); syscall_enter_audit(regs, syscall); - /* The above might have changed the syscall number */ - return ret ? : syscall_get_nr(current, regs); + return ret ? : syscall; } -noinstr long syscall_enter_from_user_mode(struct pt_regs *regs, long syscall) +static __always_inline long +__syscall_enter_from_user_work(struct pt_regs *regs, long syscall) { unsigned long ti_work; - enter_from_user_mode(regs); - instrumentation_begin(); - - local_irq_enable(); ti_work = READ_ONCE(current_thread_info()->flags); if (ti_work & SYSCALL_ENTER_WORK) syscall = syscall_trace_enter(regs, syscall, ti_work); - instrumentation_end(); return syscall; } +long syscall_enter_from_user_mode_work(struct pt_regs *regs, long syscall) +{ + return __syscall_enter_from_user_work(regs, syscall); +} + +noinstr long syscall_enter_from_user_mode(struct pt_regs *regs, long syscall) +{ + long ret; + + enter_from_user_mode(regs); + + instrumentation_begin(); + local_irq_enable(); + ret = __syscall_enter_from_user_work(regs, syscall); + instrumentation_end(); + + return ret; +} + +noinstr void syscall_enter_from_user_mode_prepare(struct pt_regs *regs) +{ + enter_from_user_mode(regs); + instrumentation_begin(); + local_irq_enable(); + instrumentation_end(); +} + /** * exit_to_user_mode - Fixup state when exiting to user mode * |