[lkml]   [2019]   [Jun]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH -mm 0/1] signal: simplify set_user_sigmask/restore_user_sigmask
On 06/06, David Laight wrote:
> If a signal handler is called, I presume that the trampoline
> calls back into the kernel to get further handlers called
> and to finally restore the original signal mask?

See sigmask_to_save(), this is what the kernel records in uc.uc_sigmask
before the signal handler runs, after that current->saved_sigmask has no

When signal handler returns it does sys_rt_sigreturn() which restores
the original mask saved in uc_sigmask.

> What happens if a signal handler calls something that
> would normally write to current->saved_sigmask?

See above.


 \ /
  Last update: 2019-06-06 13:06    [W:0.133 / U:7.232 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site