Add an kinfo sysctl to retrieve signal trampoline location for the

given process.

Note that the correctness of the trampoline length returned for ABIs
which do not use shared page depends on the correctness of the struct
sysvec sv_szsigcodebase member, which will be fixed on as-need basis.

Sponsored by:	The FreeBSD Foundation
MFC after:	1 week

1 files changed, 6 insertions, 0 deletions

diff --git a/sys/compat/freebsd32/freebsd32.h b/sys/compat/freebsd32/freebsd32.h
index 8376e95..94f886e 100644
--- a/sys/compat/freebsd32/freebsd32.h
+++ b/sys/compat/freebsd32/freebsd32.h
@@ -362,6 +362,12 @@ struct kinfo_proc32 {
 	int	ki_tdflags;
 };
 
+struct kinfo_sigtramp32 {
+	uint32_t ksigtramp_start;
+	uint32_t ksigtramp_end;
+	uint32_t ksigtramp_spare[4];
+};
+
 struct kld32_file_stat_1 {
 	int	version;	/* set to sizeof(struct kld_file_stat_1) */
 	char	name[MAXPATHLEN];