Patch set updated for coreboot: 3016115 util/cbmem: Don't output trailing garbage for cbmemc

[Vladimir Serbinenko]

Vladimir Serbinenko ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/2991

-gerrit

commit 3016115362a30db0f1334f3ac26d50eea80c5199
Author: Vladimir Serbinenko 
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 
---
 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..6051323 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);