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authorMike Frysinger <vapier@gentoo.org>2008-02-04 19:26:57 -0500
committerMike Frysinger <vapier@gentoo.org>2008-02-04 19:26:57 -0500
commit30942b18b66f35f2ceedab39af10e9eccaa943cc (patch)
treeaed5daeec1829b71d2265df3d16d7c5a5b711fe6
parentb58d8b48e25b0c866d167cc577f118f528cd9e0a (diff)
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new command for displaying strings at specified memory locations
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
-rw-r--r--common/Makefile1
-rw-r--r--common/cmd_strings.c49
2 files changed, 50 insertions, 0 deletions
diff --git a/common/Makefile b/common/Makefile
index 3cdab37..a88d1ef 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -87,6 +87,7 @@ COBJS-$(CONFIG_CMD_REISER) += cmd_reiser.o
COBJS-y += cmd_sata.o
COBJS-$(CONFIG_CMD_SCSI) += cmd_scsi.o
COBJS-$(CONFIG_CMD_SPI) += cmd_spi.o
+COBJS-$(CONFIG_CMD_STRINGS) += cmd_strings.o
COBJS-$(CONFIG_CMD_TERMINAL) += cmd_terminal.o
COBJS-$(CONFIG_CMD_UNIVERSE) += cmd_universe.o
COBJS-$(CONFIG_CMD_USB) += cmd_usb.o
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