util: add m5_fail op.

Used as a command in full-system scripts helps the user ensure the benchmarks have finished successfully.

For example, one can use:

    /path/to/benchmark args || /sbin/m5 fail 1

and thus ensure gem5 will exit with an error if the benchmark fails.

4 files changed, 13 insertions, 0 deletions

diff --git a/util/m5/m5.c b/util/m5/m5.c
index e9fe8f1f3..021816ce3 100644
--- a/util/m5/m5.c
+++ b/util/m5/m5.c
@@ -135,6 +135,15 @@ do_exit(int argc, char *argv[])
 }
 
 void
+do_fail(int argc, char *argv[])
+{
+    if (argc < 1 || argc > 2)
+        usage();
+
+    m5_fail((argc > 1) ? strtoul(argv[1], NULL, 0) : 0, strtoul(argv[0], NULL, 0));
+}
+
+void
 do_reset_stats(int argc, char *argv[])
 {
     uint64_t ints[2];
@@ -273,6 +282,7 @@ struct MainFunc
 
 struct MainFunc mainfuncs[] = {
     { "exit",           do_exit,             "[delay]" },
+    { "fail",           do_fail,             "<code> [delay]" },
     { "resetstats",     do_reset_stats,      "[delay [period]]" },
     { "dumpstats",      do_dump_stats,       "[delay [period]]" },
     { "dumpresetstats", do_dump_reset_stats, "[delay [period]]" },
diff --git a/util/m5/m5op.h b/util/m5/m5op.h
index 9e693258e..9df9a7429 100644
--- a/util/m5/m5op.h
+++ b/util/m5/m5op.h
@@ -47,6 +47,7 @@ uint64_t rpns();
 void wakeCPU(uint64_t cpuid);
 
 void m5_exit(uint64_t ns_delay);
+void m5_fail(uint64_t ns_delay, uint64_t code);
 uint64_t m5_initparam(void);
 void m5_checkpoint(uint64_t ns_delay, uint64_t ns_period);
 void m5_reset_stats(uint64_t ns_delay, uint64_t ns_period);
diff --git a/util/m5/m5op_x86.S b/util/m5/m5op_x86.S
index 93eacc24d..2c25785e6 100644
--- a/util/m5/m5op_x86.S
+++ b/util/m5/m5op_x86.S
@@ -48,6 +48,7 @@ TWO_BYTE_OP(quiesceCycle, quiescecycle_func)
 TWO_BYTE_OP(quiesceTime, quiescetime_func)
 TWO_BYTE_OP(rpns, rpns_func)
 TWO_BYTE_OP(m5_exit, exit_func)
+TWO_BYTE_OP(m5_fail, fail_func)
 TWO_BYTE_OP(m5_initparam, initparam_func)
 TWO_BYTE_OP(m5_loadsymbol, loadsymbol_func)
 TWO_BYTE_OP(m5_reset_stats, resetstats_func)
diff --git a/util/m5/m5ops.h b/util/m5/m5ops.h
index f08524014..8ff1ac42f 100644
--- a/util/m5/m5ops.h
+++ b/util/m5/m5ops.h
@@ -40,6 +40,7 @@
 #define deprecated2_func        0x11 // obsolete ivle
 #define deprecated3_func        0x20 // deprecated exit function
 #define exit_func               0x21
+#define fail_func               0x22
 #define initparam_func          0x30
 #define loadsymbol_func         0x31
 #define resetstats_func         0x40