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a2cf659ad8
It's needed for extracting binary images. Cc: Yousong Zhou <yszhou4tech@gmail.com> Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
138 lines
4.2 KiB
Diff
138 lines
4.2 KiB
Diff
From 17739b7ef510917471409d71fb45d8eaf6a1e1fb Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
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Date: Thu, 9 Dec 2021 07:14:20 +0100
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Subject: [PATCH] Support 'r' format for printing raw bytes with fdtget
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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FT is sometimes used for storing raw data. That is quite common for
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U-Boot FIT images.
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Extracting such data is not trivial currently. Using type 's' (string)
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will replace every 0x00 (NUL) with 0x20 (space). Using type 'x' will
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print bytes but in xxd incompatible format.
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This commit adds support for 'r' (raw) format. Example usage:
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fdtget -t r firmware.itb /images/foo data > image.raw
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Support for encoding isn't added as there isn't any clean way of passing
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binary data as command line argument.
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Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
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Message-Id: <20211209061420.29466-1-zajec5@gmail.com>
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Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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---
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Documentation/manual.txt | 2 +-
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fdtget.c | 5 +++++
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fdtput.c | 2 ++
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tests/run_tests.sh | 2 ++
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tests/utilfdt_test.c | 5 ++++-
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util.c | 4 ++--
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util.h | 3 ++-
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7 files changed, 18 insertions(+), 5 deletions(-)
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--- a/Documentation/manual.txt
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+++ b/Documentation/manual.txt
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@@ -712,7 +712,7 @@ The syntax of the fdtget command is:
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where options are:
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- <type> s=string, i=int, u=unsigned, x=hex
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+ <type> s=string, i=int, u=unsigned, x=hex, r=raw
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Optional modifier prefix:
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hh or b=byte, h=2 byte, l=4 byte (default)
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--- a/fdtget.c
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+++ b/fdtget.c
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@@ -91,6 +91,11 @@ static int show_data(struct display_info
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if (len == 0)
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return 0;
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+ if (disp->type == 'r') {
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+ fwrite(data, 1, len, stdout);
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+ return 0;
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+ }
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+
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is_string = (disp->type) == 's' ||
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(!disp->type && util_is_printable_string(data, len));
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if (is_string) {
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--- a/fdtput.c
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+++ b/fdtput.c
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@@ -433,6 +433,8 @@ int main(int argc, char *argv[])
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if (utilfdt_decode_type(optarg, &disp.type,
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&disp.size))
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usage("Invalid type string");
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+ if (disp.type == 'r')
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+ usage("Unsupported raw data type");
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break;
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case 'v':
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--- a/tests/run_tests.sh
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+++ b/tests/run_tests.sh
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@@ -852,6 +852,8 @@ fdtget_tests () {
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run_fdtget_test 8000 -tx $dtb /cpus/PowerPC,970@1 d-cache-size
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run_fdtget_test "61 62 63 0" -tbx $dtb /randomnode tricky1
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run_fdtget_test "a b c d de ea ad be ef" -tbx $dtb /randomnode blob
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+ run_fdtget_test "MyBoardName\0MyBoardFamilyName\0" -tr $dtb / compatible
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+ run_fdtget_test "\x0a\x0b\x0c\x0d\xde\xea\xad\xbe\xef" -tr $dtb /randomnode blob
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# Here the property size is not a multiple of 4 bytes, so it should fail
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run_wrap_error_test $DTGET -tlx $dtb /randomnode mixed
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--- a/tests/utilfdt_test.c
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+++ b/tests/utilfdt_test.c
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@@ -73,6 +73,9 @@ static void check_sizes(char *modifier,
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*ptr = 's';
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check(fmt, 's', -1);
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+
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+ *ptr = 'r';
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+ check(fmt, 'r', -1);
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}
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static void test_utilfdt_decode_type(void)
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@@ -90,7 +93,7 @@ static void test_utilfdt_decode_type(voi
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/* try every other character */
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checkfail("");
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for (ch = ' '; ch < 127; ch++) {
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- if (!strchr("iuxs", ch)) {
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+ if (!strchr("iuxsr", ch)) {
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*fmt = ch;
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fmt[1] = '\0';
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checkfail(fmt);
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--- a/util.c
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+++ b/util.c
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@@ -353,11 +353,11 @@ int utilfdt_decode_type(const char *fmt,
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}
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/* we should now have a type */
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- if ((*fmt == '\0') || !strchr("iuxs", *fmt))
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+ if ((*fmt == '\0') || !strchr("iuxsr", *fmt))
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return -1;
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/* convert qualifier (bhL) to byte size */
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- if (*fmt != 's')
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+ if (*fmt != 's' && *fmt != 'r')
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*size = qualifier == 'b' ? 1 :
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qualifier == 'h' ? 2 :
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qualifier == 'l' ? 4 : -1;
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--- a/util.h
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+++ b/util.h
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@@ -143,6 +143,7 @@ int utilfdt_write_err(const char *filena
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* i signed integer
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* u unsigned integer
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* x hex
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+ * r raw
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*
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* TODO: Implement ll modifier (8 bytes)
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* TODO: Implement o type (octal)
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@@ -160,7 +161,7 @@ int utilfdt_decode_type(const char *fmt,
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*/
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#define USAGE_TYPE_MSG \
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- "<type>\ts=string, i=int, u=unsigned, x=hex\n" \
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+ "<type>\ts=string, i=int, u=unsigned, x=hex, r=raw\n" \
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"\tOptional modifier prefix:\n" \
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"\t\thh or b=byte, h=2 byte, l=4 byte (default)";
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