new command for displaying strings at specified memory locations

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

1 files changed, 49 insertions, 0 deletions

diff --git a/common/cmd_strings.c b/common/cmd_strings.c
new file mode 100644
index 0000000..bbf56a0
--- /dev/null
+++ b/common/cmd_strings.c
@@ -0,0 +1,49 @@
+/*
+ * cmd_strings.c - just like `strings` command
+ *
+ * Copyright (c) 2008 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <config.h>
+#include <common.h>
+#include <command.h>
+
+#ifdef CONFIG_CFG_STRINGS
+
+static char *start_addr, *last_addr;
+
+int do_strings(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	if (argc == 1) {
+		printf("Usage:\n%s\n", cmdtp->usage);
+		return 1;
+	}
+
+	if ((flag & CMD_FLAG_REPEAT) == 0) {
+		start_addr = (char *)simple_strtoul(argv[1], NULL, 16);
+		if (argc > 2)
+			last_addr = (char *)simple_strtoul(argv[2], NULL, 16);
+		else
+			last_addr = (char *)-1;
+	}
+
+	char *addr = start_addr;
+	do {
+		printf("%s\n", addr);
+		addr += strlen(addr) + 1;
+	} while (addr[0] && addr < last_addr);
+
+	last_addr = addr + (last_addr - start_addr);
+	start_addr = addr;
+
+	return 0;
+}
+
+U_BOOT_CMD(strings, 3, 1, do_strings,
+	"strings - display strings\n",
+	"<addr> [byte count]\n"
+	"    - display strings at <addr> for at least [byte count] or first double NUL\n");
+
+#endif