Bug#338182: kfreebsd-5: signals for linuxthreads internal operation
Package: kfreebsd-5
Severity: wishlist
Tags: patch
Hi,
with attached patch for kernel and clone.c it should be possible leave
SIGUSR1 and SIGUSR2 free for user code.
Current libc will work with current and new kernel,
new libc will require new kernel.
Petr
--- clone.c.OLD 2005-11-08 17:25:02.000000000 +0100
+++ clone.c 2005-11-08 17:32:18.000000000 +0100
@@ -64,13 +64,13 @@
if ((flags & CSIGNAL) != 0 && (flags & CSIGNAL) != SIGCHLD)
{
- /* This implementation of clone() supports only the SIGUSR1 signal. */
- if ((flags & CSIGNAL) != SIGUSR1)
+ /* This implementation of clone() supports only the 128 signals. */
+ if ((flags & CSIGNAL) & RFTHPNMASK)
{
__set_errno (EINVAL);
return -1;
}
- rfork_flags |= RFLINUXTHPN;
+ rfork_flags |= (RFLINUXTHPN | ((flags & CSIGNAL) << RFTHPNSHIFT));
}
if (flags & CLONE_VM)
diff -ur sys.old/kern/kern_fork.c sys/kern/kern_fork.c
--- sys.old/kern/kern_fork.c 2005-04-27 13:32:23.000000000 +0200
+++ sys/kern/kern_fork.c 2005-11-08 17:17:43.000000000 +0100
@@ -502,7 +502,11 @@
p2->p_sigacts = newsigacts;
}
if (flags & RFLINUXTHPN)
- p2->p_sigparent = SIGUSR1;
+ {
+ int sig;
+ sig = RFTHPNSIGNUM(flags);
+ p2->p_sigparent = sig ? sig : SIGUSR1;
+ }
else
p2->p_sigparent = SIGCHLD;
diff -ur sys.old/sys/unistd.h sys/sys/unistd.h
--- sys.old/sys/unistd.h 2005-02-01 00:26:57.000000000 +0100
+++ sys/sys/unistd.h 2005-11-08 17:14:12.000000000 +0100
@@ -173,6 +173,10 @@
#define RFHIGHPID (1<<18) /* use a pid higher then 10 (idleproc) */
#define RFPPWAIT (1<<31) /* parent sleeps until child exits (vfork) */
#define RFKERNELONLY (RFSTOPPED | RFHIGHPID | RFPPWAIT)
+#define RFTHPNSHIFT 24 /* reserve bits 24-30 */
+#define RFTHPNMASK 0x7F /* for compatibility with linuxthreads/clone() */
+ /* allow to specify "clone exit parent notification" signal */
+#define RFTHPNSIGNUM(flags) (((flags) >> RFTHPNSHIFT) & RFTHPNMASK)
#endif /* __BSD_VISIBLE */
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