Print memcr arch and kernel uname info

This should make anlyzing logs easier.

Makefile

@@ -104,7 +104,7 @@ endif
 
 PCFLAGS += -Wstrict-prototypes -fno-stack-protector -fpie -nostdlib -ffreestanding -fomit-frame-pointer -Wa,--noexecstack
 
-GIT_VERSION = $(shell (git describe --dirty 2>/dev/null || echo "unknown") | sed 's/^v//')
+GIT_VERSION = $(shell (git describe --dirty=+ 2>/dev/null || echo "unknown") | sed 's/^v//')
 
 GOFF = ./gen-offsets.sh
 
@@ -143,7 +143,7 @@ $(B)/cpu.o: arch/$(ARCH)/cpu.c
 	$(CC) $(MCFLAGS) -c $^ -o $@
 
 $(B)/memcr.o: memcr.c $(B)/parasite-blob.h
-	$(CC) $(MCFLAGS) -DGIT_VERSION='"$(GIT_VERSION)"' -I$(B) -c $< -o $@
+	$(CC) $(MCFLAGS) -DGIT_VERSION='"$(GIT_VERSION)"' -DARCH_NAME='"$(ARCH)"' -I$(B) -c $< -o $@
 
 $(B)/memcr: $(B)/memcr.o $(B)/cpu.o $(B)/enter.o
 	$(CC) $(MCFLAGS) $^ $(LDFLAGS) -o $@

memcr.c

@@ -39,6 +39,7 @@
 #include <sys/ptrace.h>
 #include <sys/types.h>
 #include <sys/time.h>
+#include <sys/utsname.h>
 #include <sys/resource.h>
 #include <sys/wait.h>
 #include <stdlib.h>
@@ -65,6 +66,10 @@
 #include "arch/enter.h"
 #include "parasite-blob.h"
 
+#ifndef ARCH_NAME
+#define ARCH_NAME "unknown"
+#endif
+
 #define NT_PRSTATUS 1
 
 #define __round_mask(x, y) ((__typeof__(x))((y)-1))
@@ -2838,7 +2843,15 @@ static int user_interactive_mode(pid_t pid)
 
 static void print_version(void)
 {
-	fprintf(stdout, "[i] memcr version %s\n", GIT_VERSION);
+	int ret;
+	struct utsname utsn;
+	char buf[256] = { 0 };
+
+	ret = uname(&utsn);
+	if (!ret)
+		snprintf(buf, sizeof(buf), " kernel %s %s", utsn.release, utsn.machine);
+
+	fprintf(stdout, "[i] memcr %s %s%s\n", GIT_VERSION, ARCH_NAME, buf);
 }
 
 static void usage(const char *name, int status)