[coreboot-gerrit] Patch set updated for coreboot: 95ae323 util/cbmem: Don't output trailing garbage for cbmemc

[Vladimir Serbinenko (phcoder@gmail.com)]

Vladimir Serbinenko (phcoder at gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/2991

-gerrit

commit 95ae32391716cf538a2889444b32a82adcac3839
Author: Vladimir Serbinenko <phcoder at gmail.com>
Date:   Sat Mar 30 12:15:12 2013 +0100

    util/cbmem: Don't output trailing garbage for cbmemc
    
    Current code outputs the whole cbmemc buffer even if only part of
    it is really used. Fix it to output only really used part and notify
    the user if the buffer was too small for the required data.
    
    Change-Id: I68c1970cf84d49b2d7d6007dae0679d7a7a0cb99
    Signed-off-by: Vladimir Serbinenko <phcoder at gmail.com>
---
 util/cbmem/cbmem.c | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/util/cbmem/cbmem.c b/util/cbmem/cbmem.c
index bc6bd6b..e12446a 100644
--- a/util/cbmem/cbmem.c
+++ b/util/cbmem/cbmem.c
@@ -308,12 +308,21 @@ static void dump_timestamps(void)
 	unmap_memory();
 }
 
+static const char *future_ngettext (const char *sing, const char *plural,
+	unsigned long int n)
+{
+	if (n == 1)
+		return sing;
+	return plural;
+}
+
 /* dump the cbmem console */
 static void dump_console(void)
 {
 	void *console_p;
 	char *console_c;
 	uint32_t size;
+	uint32_t cursor;
 
 	if (console.tag != LB_TAG_CBMEM_CONSOLE) {
 		fprintf(stderr, "No console found in coreboot table.\n");
@@ -328,6 +337,12 @@ static void dump_console(void)
 	 * Hence we have to add 8 to get to the actual console string.
 	 */
 	size = *(uint32_t *)console_p;
+	cursor = *(uint32_t *) (console_p + 4);
+	/* Cursor continues to go on even after no more data fits in
+	 * the buffer but the data is dropped in this case.
+	 */
+	if (size > cursor)
+		size = cursor;
 	console_c = malloc(size + 1);
 	if (!console_c) {
 		fprintf(stderr, "Not enough memory for console.\n");
@@ -337,7 +352,11 @@ static void dump_console(void)
 	memcpy(console_c, console_p + 8, size);
 	console_c[size] = 0;
 
-	printf("%s", console_c);
+	printf("%s\n", console_c);
+	if (size < cursor)
+		printf(future_ngettext("one byte lost\n" :
+				       "%d bytes lost\n", cursor - size),
+		       cursor - size);
 
 	free(console_c);