Add the linux 2.6.x stuff (not used by default!):

 - TLS - complete
 - pid/tid mangling - complete
 - thread area - complete
 - futexes - complete with issues
 - clone() extension - complete with some possible minor issues
 - mq*/timer*/clock* stuff - complete but untested and the mq* stuff is
   disabled when not build as part of the kernel with native FreeBSD mq*
   support (module support for this will come later)

Tested with:
 - linux-firefox - works, tested
 - linux-opera - works, tested
 - linux-realplay - doesnt work, issue with futexes
 - linux-skype - doesnt work, issue with futexes
 - linux-rt2-demo - works, tested
 - linux-acroread - doesnt work, unknown reason (coredump) and sometimes
   issue with futexes
 - various unix utilities in linux-base-gentoo3 and linux-base-fc4:
   everything tried worked

On amd64 not everything is supported like on i386, the catchup is planned for
later when the remaining bugs in the new functions are fixed.

To test this new stuff, you have to run
	sysctl compat.linux.osrelease=2.6.16
to switch back use
	sysctl compat.linux.osrelease=2.4.2

Don't switch while running a linux program, strange things may or may not
happen.

Sponsored by:			Google SoC 2006
Submitted by:			rdivacky
Some suggestions/help by:	jhb, kib, manu@NetBSD.org, netchild

1 files changed, 58 insertions, 0 deletions

diff --git a/sys/compat/linux/linux_signal.c b/sys/compat/linux/linux_signal.c
index 081b7c0..50a05fa 100644
--- a/sys/compat/linux/linux_signal.c
+++ b/sys/compat/linux/linux_signal.c
@@ -49,6 +49,10 @@ __FBSDID("$FreeBSD$");
 #endif
 #include <compat/linux/linux_signal.h>
 #include <compat/linux/linux_util.h>
+#include <compat/linux/linux_emul.h>
+
+extern struct sx emul_shared_lock;
+extern struct sx emul_lock;
 
 void
 linux_to_bsd_sigset(l_sigset_t *lss, sigset_t *bss)
@@ -447,3 +451,57 @@ linux_kill(struct thread *td, struct linux_kill_args *args)
 	tmp.pid = args->pid;
 	return (kill(td, &tmp));
 }
+
+int
+linux_tgkill(struct thread *td, struct linux_tgkill_args *args)
+{
+   	struct linux_emuldata *em;
+	struct linux_kill_args ka;
+	struct proc *p;
+
+#ifdef DEBUG
+	if (ldebug(tgkill))
+		printf(ARGS(tgkill, "%d, %d, %d"), args->tgid, args->pid, args->sig);
+#endif
+
+	ka.pid = args->pid;
+	ka.signum = args->sig;
+
+	if (args->tgid == -1)
+	   	return linux_kill(td, &ka);
+
+	if ((p = pfind(args->pid)) == NULL)
+	      	return ESRCH;
+
+	if (p->p_sysent != &elf_linux_sysvec)
+		return ESRCH;
+
+	PROC_UNLOCK(p);
+
+	em = em_find(p, EMUL_UNLOCKED);
+
+	if (em == NULL) {
+#ifdef DEBUG
+		printf("emuldata not found in tgkill.\n");
+#endif
+		return ESRCH;
+	}
+
+	if (em->shared->group_pid != args->tgid)
+	   	return ESRCH;
+
+	EMUL_UNLOCK(&emul_lock);
+
+	return linux_kill(td, &ka);
+}
+
+int
+linux_tkill(struct thread *td, struct linux_tkill_args *args)
+{
+#ifdef DEBUG
+	if (ldebug(tkill))
+		printf(ARGS(tkill, "%i, %i"), args->tid, args->sig);
+#endif
+
+	return (linux_kill(td, (struct linux_kill_args *) args));
+}