Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\events\uprobes.c Create Date:2022-07-28 13:46:28
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Name:If we are singlestepping, then ensure this thread is not connected to* non-fatal signals until completion of singlestep. When xol insn itself* triggers the signal, restart the original insn even if the task is

Proto:bool uprobe_deny_signal(void)

Type:bool

Parameter:Nothing

1969  t = current process
1970  utask = utask
1972  If Value is more likely to compile time(!utask || !active_uprobe) Then Return false
1975  WARN_ON_ONCE(state != UTASK_SSTEP)
1977  If signal_pending(t) Then
1978  spin_lock_irq( & siglock)
1979  clear_tsk_thread_flag(t, signal pending )
1980  spin_unlock_irq( & siglock)
1982  If __fatal_signal_pending(t) || If xol insn itself traps and generates a signal(Say,* SIGILL/SIGSEGV/etc), then detect the case where a singlestepped* instruction jumps back to its own address. It is assumed that anything* like do_page_fault/do_trap/etc sets thread.trap_nr != -1. Then
1983  state = UTASK_SSTEP_TRAPPED
1984  Set thread flags in other task's structures.* See asm/thread_info.h for TIF_xxxx flags available:
1988  Return true