Change in coreboot[master]: libpayload/libc: Add second version of hexdump

[Lee Leahy (Code Review)]

Lee Leahy has uploaded this change for review. ( https://review.coreboot.org/20441

Change subject: libpayload/libc: Add second version of hexdump
......................................................................

libpayload/libc: Add second version of hexdump

Add hexdump_gpl.c which is selected with CONFIG_GPL.  Simplify the
conditional logic.

Don't continue displaying data after the end of the specified buffer.
Use the version from coreboot to display only the data requested.  This
version also compresses the all ones display.

TEST=Build and run on Galileo Gen2

Change-Id: I0e2f943346cd4f421987075cc37d1ac6d3e980ef
Signed-off-by: Lee Leahy 
---
M payloads/libpayload/libc/Makefile.inc
A payloads/libpayload/libc/hexdump_gpl.c
2 files changed, 80 insertions(+), 13 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/41/20441/1

diff --git a/payloads/libpayload/libc/Makefile.inc b/payloads/libpayload/libc/Makefile.inc
index edef62c..39f4584 100644
--- a/payloads/libpayload/libc/Makefile.inc
+++ b/payloads/libpayload/libc/Makefile.inc
@@ -28,18 +28,24 @@
 ## SUCH DAMAGE.
 ##

-libc-$(CONFIG_LP_LIBC) += malloc.c printf.c console.c string.c
-libc-$(CONFIG_LP_LIBC) += memory.c ctype.c ipchecksum.c lib.c libgcc.c
-libc-$(CONFIG_LP_LIBC) += rand.c time.c exec.c
-libc-$(CONFIG_LP_LIBC) += readline.c getopt_long.c sysinfo.c
-libc-$(CONFIG_LP_LIBC) += args.c
-libc-$(CONFIG_LP_LIBC) += strlcpy.c
-libc-$(CONFIG_LP_LIBC) += qsort.c
-libc-$(CONFIG_LP_LIBC) += hexdump.c
-libc-$(CONFIG_LP_LIBC) += die.c
-libc-$(CONFIG_LP_LIBC) += coreboot.c
-libc-$(CONFIG_LP_LIBC) += fmap.c
+ifeq ($(CONFIG_LP_LIBC),y)

-ifeq ($(CONFIG_LP_ARCH_MIPS),y)
-libc-$(CONFIG_LP_LIBC) += 64bit_div.c
+libc-y += malloc.c printf.c console.c string.c
+libc-y += memory.c ctype.c ipchecksum.c lib.c libgcc.c
+libc-y += rand.c time.c exec.c
+libc-y += readline.c getopt_long.c sysinfo.c
+libc-y += args.c
+libc-y += strlcpy.c
+libc-y += qsort.c
+ifeq ($(CONFIG_GPL),y)
+libc-y += hexdump_gpl.c
+else
+libc-y += hexdump.c
+endif
+libc-y += die.c
+libc-y += coreboot.c
+libc-y += fmap.c
+
+libc-$(CONFIG_LP_ARCH_MIPS) += 64bit_div.c
+
 endif
diff --git a/payloads/libpayload/libc/hexdump_gpl.c b/payloads/libpayload/libc/hexdump_gpl.c
new file mode 100644
index 0000000..9f99a79
--- /dev/null
+++ b/payloads/libpayload/libc/hexdump_gpl.c
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2013 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but without any warranty; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <libpayload.h>
+
+void hexdump(const void *memory, size_t length)
+{
+	int i;
+	uint8_t *line;
+	int all_zero = 0;
+	int all_one = 0;
+	size_t num_bytes;
+
+	for (i = 0; i < length; i += 16) {
+		int j;
+		num_bytes = MIN(length - i, 16);
+		line = ((uint8_t *)memory) + i;
+
+		all_zero++;
+		all_one++;
+		for (j = 0; j < num_bytes; j++) {
+			if (line[j] != 0) {
+				all_zero = 0;
+				break;
+			}
+		}
+
+		for (j = 0; j < num_bytes; j++) {
+			if (line[j] != 0xff) {
+				all_one = 0;
+				break;
+			}
+		}
+
+		if ((all_zero < 2) && (all_one < 2)) {
+			printf("%p:", memory + i);
+			for (j = 0; j < num_bytes; j++)
+				printf(" %02x", line[j]);
+			for (; j < 16; j++)
+				printf("   ");
+			printf("  ");
+			for (j = 0; j < num_bytes; j++)
+				printf("%c",
+				       isprint(line[j]) ? line[j] : '.');
+			printf("\n");
+		} else if ((all_zero == 2) || (all_one == 2)) {
+			printf("...\n");
+		}
+	}
+}