new command for displaying strings at specified memory locations

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

diff --git a/common/Makefile b/common/Makefile
index 3cdab37a4e8f26992c4b13cf549486e0616413dd..a88d1ef536d33588c81b4738ebc48f44aea4ff14 100644 (file)
--- 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 (file)
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