dtc: Add support for binary includes.
David Gibson
david at gibson.dropbear.id.au
Wed Jun 11 11:58:39 EST 2008
On Wed, Jun 04, 2008 at 09:26:23AM -0500, Jon Loeliger wrote:
> David Gibson wrote:
>
>> But as I said that can be dealt with in the future without breaking
>> compatibility. Objection withdrawn.
>>
>
> And on that note, I officially implore Scott to
> re-submit his binary include patch!
Scott's original patch does still have some implementation details I
didn't like. So in the interests of saving time, I've addressed some
of those, added a testcase, and and now resubmitting my revised
version of Scott's patch.
dtc: Add support for binary includes.
A property's data can be populated with a file's contents
as follows:
node {
prop = /incbin/("path/to/data");
};
A subset of a file can be included by passing start and size parameters.
For example, to include bytes 8 through 23:
node {
prop = /incbin/("path/to/data", 8, 16);
};
As with /include/, non-absolute paths are looked for in the directory
of the source file that includes them.
Implementation revised, and a testcase added by David Gibson
Signed-off-by: Scott Wood <scottwood at freescale.com>
Signed-off-by: David Gibson <david at gibson.dropbear.id.au>
Index: dtc/data.c
===================================================================
--- dtc.orig/data.c 2008-06-11 11:50:29.000000000 +1000
+++ dtc/data.c 2008-06-11 11:50:38.000000000 +1000
@@ -167,14 +167,29 @@
return d;
}
-struct data data_copy_file(FILE *f, size_t len)
+struct data data_copy_file(FILE *f, size_t maxlen)
{
- struct data d;
+ struct data d = empty_data;
+
+ while (!feof(f) && (d.len < maxlen)) {
+ size_t chunksize, ret;
+
+ if (maxlen == -1)
+ chunksize = 4096;
+ else
+ chunksize = maxlen - d.len;
+
+ d = data_grow_for(d, chunksize);
+ ret = fread(d.val + d.len, 1, chunksize, f);
+
+ if (ferror(f))
+ die("Error reading file into data: %s", strerror(errno));
- d = data_grow_for(empty_data, len);
+ if (d.len + ret < d.len)
+ die("Overflow reading file into data\n");
- d.len = len;
- fread(d.val, len, 1, f);
+ d.len += ret;
+ }
return d;
}
Index: dtc/dtc-lexer.l
===================================================================
--- dtc.orig/dtc-lexer.l 2008-06-11 11:50:29.000000000 +1000
+++ dtc/dtc-lexer.l 2008-06-11 11:50:38.000000000 +1000
@@ -190,6 +190,13 @@
return DT_PROPNODENAME;
}
+"/incbin/" {
+ yylloc.file = srcpos_file;
+ yylloc.first_line = yylineno;
+ DPRINT("Binary Include\n");
+ return DT_INCBIN;
+ }
+
<*>[[:space:]]+ /* eat whitespace */
<*>"/*"([^*]|\*+[^*/])*\*+"/" {
Index: dtc/dtc-parser.y
===================================================================
--- dtc.orig/dtc-parser.y 2008-06-11 11:50:29.000000000 +1000
+++ dtc/dtc-parser.y 2008-06-11 11:50:38.000000000 +1000
@@ -21,6 +21,8 @@
%locations
%{
+#include <stdio.h>
+
#include "dtc.h"
#include "srcpos.h"
@@ -59,6 +61,7 @@
%token <data> DT_STRING
%token <labelref> DT_LABEL
%token <labelref> DT_REF
+%token DT_INCBIN
%type <data> propdata
%type <data> propdataprefix
@@ -197,6 +200,34 @@
{
$$ = data_add_marker($1, REF_PATH, $2);
}
+ | propdataprefix DT_INCBIN '(' DT_STRING ',' addr ',' addr ')'
+ {
+ struct search_path path = { srcpos_file->dir, NULL, NULL };
+ struct dtc_file *file = dtc_open_file($4.val, &path);
+ struct data d = empty_data;
+
+ if ($6 != 0)
+ if (fseek(file->file, $6, SEEK_SET) != 0)
+ yyerrorf("Couldn't seek to offset %llu in \"%s\": %s",
+ (unsigned long long)$6,
+ $4.val, strerror(errno));
+
+ d = data_copy_file(file->file, $8);
+
+ $$ = data_merge($1, d);
+ dtc_close_file(file);
+ }
+ | propdataprefix DT_INCBIN '(' DT_STRING ')'
+ {
+ struct search_path path = { srcpos_file->dir, NULL, NULL };
+ struct dtc_file *file = dtc_open_file($4.val, &path);
+ struct data d = empty_data;
+
+ d = data_copy_file(file->file, -1);
+
+ $$ = data_merge($1, d);
+ dtc_close_file(file);
+ }
| propdata DT_LABEL
{
$$ = data_add_marker($1, LABEL, $2);
Index: dtc/tests/incbin.bin
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ dtc/tests/incbin.bin 2008-06-11 11:50:38.000000000 +1000
@@ -0,0 +1 @@
+abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
\ No newline at end of file
Index: dtc/tests/incbin.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ dtc/tests/incbin.c 2008-06-11 11:50:38.000000000 +1000
@@ -0,0 +1,75 @@
+/*
+ * libfdt - Flat Device Tree manipulation
+ * Testcase for string escapes in dtc
+ * Copyright (C) 2006 David Gibson, IBM Corporation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+#include <errno.h>
+
+#include <fdt.h>
+#include <libfdt.h>
+
+#include "tests.h"
+#include "testdata.h"
+
+#define CHUNKSIZE 1024
+
+void *load_file(const char *name, int *len)
+{
+ FILE *f;
+ void *buf = NULL;
+ int bufsize = 0, n;
+
+ *len = 0;
+
+ f = fopen(name, "r");
+ if (!f)
+ FAIL("Couldn't open \"%s\": %s", name, strerror(errno));
+
+ while (!feof(f)) {
+ if (bufsize < (*len + CHUNKSIZE)) {
+ buf = xrealloc(buf, *len + CHUNKSIZE);
+ bufsize = *len + CHUNKSIZE;
+ }
+
+ n = fread(buf + *len, 1, CHUNKSIZE, f);
+ if (ferror(f))
+ FAIL("Error reading \"%s\": %s", name, strerror(errno));
+ *len += n;
+ }
+
+ return buf;
+}
+
+int main(int argc, char *argv[])
+{
+ void *fdt, *incbin;
+ int len;
+
+ test_init(argc, argv);
+
+ incbin = load_file("incbin.bin", &len);
+ fdt = load_blob_arg(argc, argv);
+
+ check_getprop(fdt, 0, "incbin", len, incbin);
+ check_getprop(fdt, 0, "incbin-partial", 17, incbin + 13);
+
+ PASS();
+}
Index: dtc/tests/incbin.dts
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ dtc/tests/incbin.dts 2008-06-11 11:50:38.000000000 +1000
@@ -0,0 +1,6 @@
+/dts-v1/;
+
+/ {
+ incbin = /incbin/("incbin.bin");
+ incbin-partial = /incbin/("incbin.bin", 13, 17);
+};
Index: dtc/tests/Makefile.tests
===================================================================
--- dtc.orig/tests/Makefile.tests 2008-06-11 11:50:29.000000000 +1000
+++ dtc/tests/Makefile.tests 2008-06-11 11:50:38.000000000 +1000
@@ -9,7 +9,7 @@
sw_tree1 \
move_and_save mangle-layout nopulate \
open_pack rw_tree1 set_name setprop del_property del_node \
- string_escapes references path-references boot-cpuid \
+ string_escapes references path-references boot-cpuid incbin \
dtbs_equal_ordered \
add_subnode_with_nops
LIB_TESTS = $(LIB_TESTS_L:%=$(TESTS_PREFIX)%)
Index: dtc/tests/run_tests.sh
===================================================================
--- dtc.orig/tests/run_tests.sh 2008-06-11 11:50:38.000000000 +1000
+++ dtc/tests/run_tests.sh 2008-06-11 11:50:38.000000000 +1000
@@ -207,6 +207,10 @@
run_dtc_test -I dts -O dtb -o dtc_comments-cmp.test.dtb comments-cmp.dts
run_test dtbs_equal_ordered dtc_comments.test.dtb dtc_comments-cmp.test.dtb
+ # Check /incbin/ directive
+ run_dtc_test -I dts -O dtb -o incbin.test.dtb incbin.dts
+ run_test incbin incbin.test.dtb
+
# Check boot_cpuid_phys handling
run_dtc_test -I dts -O dtb -b 17 -o boot_cpuid.test.dtb empty.dts
run_test boot-cpuid boot_cpuid.test.dtb 17
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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