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authorHeiko Carstens <heiko.carstens@de.ibm.com>2010-05-17 10:00:21 +0200
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2010-05-17 10:00:17 +0200
commitab3c68ee5fd329ba48094d3417fd60e30ea14a87 (patch)
treee5c3daa56821c33ea80b6853b4f817193b22df99 /kernel
parent57b28f66316d287b9dbf7b28358ca90257230769 (diff)
downloadlinux-ab3c68ee5fd329ba48094d3417fd60e30ea14a87.tar.bz2
[S390] debug: enable exception-trace debug facility
The exception-trace facility on x86 and other architectures prints traces to dmesg whenever a user space application crashes. s390 has such a feature since ages however it is called userprocess_debug and is enabled differently. This patch makes sure that whenever one of the two procfs files /proc/sys/kernel/userprocess_debug /proc/sys/debug/exception-trace is modified the contents of the second one changes as well. That way we keep backwards compatibilty but also support the same interface like other architectures do. Besides that the output of the traces is improved since it will now also contain the corresponding filename of the vma (when available) where the process caused a fault or trap. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/sysctl.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 8686b0f5fc12..90f536d84643 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -621,7 +621,7 @@ static struct ctl_table kern_table[] = {
#endif
{
.procname = "userprocess_debug",
- .data = &sysctl_userprocess_debug,
+ .data = &show_unhandled_signals,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec,
@@ -1431,7 +1431,8 @@ static struct ctl_table fs_table[] = {
};
static struct ctl_table debug_table[] = {
-#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_SPARC)
+#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_SPARC) || \
+ defined(CONFIG_S390)
{
.procname = "exception-trace",
.data = &show_unhandled_signals,