MFC r283471:

According to Linux man sigaltstack(3) shall return EINVAL if the ss
argument is not a null pointer, and the ss_flags member pointed to by ss
contains flags other than SS_DISABLE. However, in fact, Linux also
allows SS_ONSTACK flag which is simply ignored.

For buggy apps (at least mono) ignore other than SS_DISABLE
flags as a Linux do.

While here move MI part of sigaltstack code to the appropriate place.

2 files changed, 0 insertions, 26 deletions

diff --git a/sys/amd64/linux/linux.h b/sys/amd64/linux/linux.h
index 0845809..b4e7190 100644
--- a/sys/amd64/linux/linux.h
+++ b/sys/amd64/linux/linux.h
@@ -250,9 +250,6 @@ struct l_newstat {
 #define	LINUX_SS_ONSTACK	1
 #define	LINUX_SS_DISABLE	2
 
-int linux_to_bsd_sigaltstack(int lsa);
-int bsd_to_linux_sigaltstack(int bsa);
-
 typedef void	(*l_handler_t)(l_int);
 
 typedef struct {
diff --git a/sys/amd64/linux/linux_machdep.c b/sys/amd64/linux/linux_machdep.c
index d8704fd..8b0da51 100644
--- a/sys/amd64/linux/linux_machdep.c
+++ b/sys/amd64/linux/linux_machdep.c
@@ -87,29 +87,6 @@ __FBSDID("$FreeBSD$");
 #include <compat/linux/linux_util.h>
 #include <compat/linux/linux_emul.h>
 
-int
-linux_to_bsd_sigaltstack(int lsa)
-{
-	int bsa = 0;
-
-	if (lsa & LINUX_SS_DISABLE)
-		bsa |= SS_DISABLE;
-	if (lsa & LINUX_SS_ONSTACK)
-		bsa |= SS_ONSTACK;
-	return (bsa);
-}
-
-int
-bsd_to_linux_sigaltstack(int bsa)
-{
-	int lsa = 0;
-
-	if (bsa & SS_DISABLE)
-		lsa |= LINUX_SS_DISABLE;
-	if (bsa & SS_ONSTACK)
-		lsa |= LINUX_SS_ONSTACK;
-	return (lsa);
-}
 
 int
 linux_execve(struct thread *td, struct linux_execve_args *args)