6 Jun
2019
6 Jun
'19
11:05 a.m.
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 meaning.
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.
Oleg.