[strace PATCH 08/12] Introduce s390_runtime_instr system call decoder

Eugene Syromyatnikov
2018-01-18T06:16:57Z

* linux/s390/syscallent.h ([342]): Change decoder to s390_runtime_instr.
* linux/s390x/syscallent.h: Likewise.
* s390.c (SYS_FUNC(s390_runtime_instr)): New function.
* xlat/s390_runtime_instr_commands.in: New file.
---
linux/s390/syscallent.h | 2 +-
linux/s390x/syscallent.h | 2 +-
s390.c | 31 +++++++++++++++++++++++++++++++
xlat/s390_runtime_instr_commands.in | 2 ++
4 files changed, 35 insertions(+), 2 deletions(-)
create mode 100644 xlat/s390_runtime_instr_commands.in

diff --git a/linux/s390/syscallent.h b/linux/s390/syscallent.h
index 522c641..a807c95 100644
--- a/linux/s390/syscallent.h
+++ b/linux/s390/syscallent.h
@@ -371,7 +371,7 @@
[339] = { 2, TD, SEN(setns), "setns" },
[340] = { 6, 0, SEN(process_vm_readv), "process_vm_readv" },
[341] = { 6, 0, SEN(process_vm_writev), "process_vm_writev" },
-[342] = { 2, 0, SEN(printargs), "s390_runtime_instr" },
+[342] = { 2, 0, SEN(s390_runtime_instr), "s390_runtime_instr" },
[343] = { 5, 0, SEN(kcmp), "kcmp" },
[344] = { 3, TD, SEN(finit_module), "finit_module" },
[345] = { 3, 0, SEN(sched_setattr), "sched_setattr" },
diff --git a/linux/s390x/syscallent.h b/linux/s390x/syscallent.h
index 8e068c9..c4a770d 100644
--- a/linux/s390x/syscallent.h
+++ b/linux/s390x/syscallent.h
@@ -355,7 +355,7 @@
[339] = { 2, TD, SEN(setns), "setns" },
[340] = { 6, 0, SEN(process_vm_readv), "process_vm_readv" },
[341] = { 6, 0, SEN(process_vm_writev), "process_vm_writev" },
-[342] = { 2, 0, SEN(printargs), "s390_runtime_instr" },
+[342] = { 2, 0, SEN(s390_runtime_instr), "s390_runtime_instr" },
[343] = { 5, 0, SEN(kcmp), "kcmp" },
[344] = { 3, TD, SEN(finit_module), "finit_module" },
[345] = { 3, 0, SEN(sched_setattr), "sched_setattr" },
diff --git a/s390.c b/s390.c
index a7efd29..dc7bf36 100644
--- a/s390.c
+++ b/s390.c
@@ -36,6 +36,7 @@
#include "print_fields.h"

#include "xlat/s390_guarded_storage_commands.h"
+#include "xlat/s390_runtime_instr_commands.h"
#include "xlat/s390_sthyi_function_codes.h"

/*
@@ -1210,4 +1211,34 @@ SYS_FUNC(s390_guarded_storage)
return RVAL_DECODED;
}

+SYS_FUNC(s390_runtime_instr)
+{
+ int command = (int) tcp->u_arg[0];
+ int signum = (int) tcp->u_arg[1];
+
+ const char *command_descr =
+ xlookup(s390_runtime_instr_commands, command);
+
+ tprintf("%d", command);
+ tprints_comment(command_descr ? command_descr :
+ "S390_RUNTIME_INSTR_???");
+
+ /*
+ * signum is ignored since Linux 4.4, but let's print it for start
+ * command anyway.
+ */
+ switch (command) {
+ case S390_RUNTIME_INSTR_START:
+ tprints(", ");
+ tprints(signame(signum));
+ break;
+
+ case S390_RUNTIME_INSTR_STOP:
+ default:
+ break;
+ }
+
+ return RVAL_DECODED;
+}
+
#endif /* defined S390 || defined S390X */
diff --git a/xlat/s390_runtime_instr_commands.in b/xlat/s390_runtime_instr_commands.in
new file mode 100644
index 0000000..395afc4
--- /dev/null
+++ b/xlat/s390_runtime_instr_commands.in
@@ -0,0 +1,2 @@
+S390_RUNTIME_INSTR_START 0x1
+S390_RUNTIME_INSTR_STOP 0x2
--
2.1.4