string: move strdup() & strconcat() to lib/string.c

Move functions not available in PRE_RAM into seperate file.
Makes it easier to share code between rom and ramstage.

Change-Id: I0b9833fbf6742d110ee4bfc00cd650f219aebb2c
Signed-off-by: Thomas Heijligen <thomas.heijligen@secunet.com>
Reviewed-on: https://review.coreboot.org/c/31141
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

2 files changed, 22 insertions, 0 deletions

diff --git a/src/lib/Makefile.inc b/src/lib/Makefile.inc
index 2fd4e4ca0c..68431f9ce5 100644
--- a/src/lib/Makefile.inc
+++ b/src/lib/Makefile.inc
@@ -118,6 +118,7 @@ ramstage-y += bootmem.c
 ramstage-y += fmap.c
 ramstage-y += memchr.c
 ramstage-y += memcmp.c
+ramstage-y += string.c
 ramstage-y += malloc.c
 smm-$(CONFIG_SMM_TSEG) += malloc.c
 ramstage-y += dimm_info_util.c
diff --git a/src/lib/string.c b/src/lib/string.c
new file mode 100644
index 0000000000..df2fd80849
--- /dev/null
+++ b/src/lib/string.c
@@ -0,0 +1,21 @@
+#include <string.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+char *strdup(const char *s)
+{
+	size_t sz = strlen(s) + 1;
+	char *d = malloc(sz);
+	memcpy(d, s, sz);
+	return d;
+}
+
+char *strconcat(const char *s1, const char *s2)
+{
+	size_t sz_1 = strlen(s1);
+	size_t sz_2 = strlen(s2);
+	char *d = malloc(sz_1 + sz_2 + 1);
+	memcpy(d, s1, sz_1);
+	memcpy(d + sz_1, s2, sz_2 + 1);
+	return d;
+}