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Gained knowledge from NewOS change 1930 and fixed the sig_block_mask change

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as already suggested in my earlier comment.
Added some comments.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@6993 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler 2004-03-16 02:23:32 +00:00
parent 2fe87e7c58
commit b721e8fd26
1 changed files with 7 additions and 2 deletions
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9
src/kernel/core/signal.c
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@ -87,6 +87,10 @@ handle_signals(struct thread *thread, int state)
}
}
// ToDo: it's not safe to call arch_setup_signal_frame with
// interrupts disabled since it writes to the user stack
// and may page fault.
// User defined signal handler
dprintf("### Setting up custom signal handler frame...\n");
arch_setup_signal_frame(thread, handler, sig, thread->sig_block_mask);
@ -94,8 +98,7 @@ handle_signals(struct thread *thread, int state)
if (handler->sa_flags & SA_ONESHOT)
handler->sa_handler = SIG_DFL;
if (!(handler->sa_flags & SA_NOMASK))
thread->sig_block_mask |= (handler->sa_mask | (1L << sig)) & BLOCKABLE_SIGS;
// ToDo: is that really (1L << sig) and not (1L << (sig-1)) ???
thread->sig_block_mask |= (handler->sa_mask | (1L << (sig - 1))) & BLOCKABLE_SIGS;
return global_resched;
} else
@ -190,6 +193,8 @@ send_signal_etc(pid_t threadID, uint signal, uint32 flags)
int
send_signal(pid_t threadID, uint signal)
{
// The BeBook states that this function wouldn't be exported
// for drivers, but, of course, it's wrong.
return send_signal_etc(threadID, signal, 0);
}