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dtc/tests/move_and_save.c

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libfdt: Implement fdt_move() Implement the fdt_move() function for copying/moving device trees to a new buffer, or within an existing buffer.
18 years ago
/*
* libfdt - Flat Device Tree manipulation
* Basic testcase for read-only access
* 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 <limits.h>
libfdt: Remove #includes from fdt.h At present fdt.h #includes stdint.h. This makes some sense, because fdt.h uses the standard fixed-width integer types. However, this can make life difficult when building in different environments which may not have a stdint.h. Therefore, this patch removes the #include from fdt.h, instead requiring that users of fdt.h define the fixed-width integer types before including fdt.h, either by themselves including stdint.h, or by any other means.
18 years ago
#include <stdint.h>
libfdt: Implement fdt_move() Implement the fdt_move() function for copying/moving device trees to a new buffer, or within an existing buffer.
18 years ago
#include <libfdt.h>
#include "tests.h"
#include "testdata.h"
int main(int argc, char *argv[])
{
libfdt: Use void * to refer to device tree blobs At present, the blob containing a device tree is passed to the various fdt_*() functions as a (struct fdt_header *) i.e. a pointer to the header structure at the beginning of the blob. This patch changes all the functions so that they instead take a (void *) pointing to the blob. Under some circumstances can avoid the need for the caller to cast a blob pointer into a (struct fdt_header *) before passing it to the fdt_*() functions. Using a (void *) also reduce the temptation for users of the library to directly dereference toe (struct fdt_header *) to access header fields. Instead they must use the fdt_get_header() or fdt_set_header() macros, or the fdt_magic(), fdt_totalsize() etc. wrappers around them which are safer, since they will always handle endian conversion. With this change, the whole-tree moving, or manipulating functions: fdt_move(), fdt_open_into() and fdt_pack() no longer need to return a pointer to the "new" tree. The given (void *) buffer pointer they take can instead be used directly by the caller as the new tree. Those functions are thus changed to instead return an error code (which in turn reduces the number of functions using the ugly encoding of error values into pointers). Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
18 years ago
void *fdt, *fdt1, *fdt2, *fdt3;
dtc: Enable and fix -Wpointer-arith warnings This patch turns on the -Wpointer-arith option in the dtc Makefile, and fixes the resulting warnings due to using (void *) in pointer arithmetic. While convenient, pointer arithmetic on void * is not portable, so it's better that we avoid it, particularly in libfdt. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
17 years ago
char *buf;
libfdt: Implement fdt_move() Implement the fdt_move() function for copying/moving device trees to a new buffer, or within an existing buffer.
18 years ago
int shuntsize;
int bufsize;
int err;
const char *inname;
char outname[PATH_MAX];
test_init(argc, argv);
fdt = load_blob_arg(argc, argv);
inname = argv[1];
shuntsize = ALIGN(fdt_totalsize(fdt) / 2, sizeof(uint64_t));
bufsize = fdt_totalsize(fdt) + shuntsize;
buf = xmalloc(bufsize);
libfdt: Use void * to refer to device tree blobs At present, the blob containing a device tree is passed to the various fdt_*() functions as a (struct fdt_header *) i.e. a pointer to the header structure at the beginning of the blob. This patch changes all the functions so that they instead take a (void *) pointing to the blob. Under some circumstances can avoid the need for the caller to cast a blob pointer into a (struct fdt_header *) before passing it to the fdt_*() functions. Using a (void *) also reduce the temptation for users of the library to directly dereference toe (struct fdt_header *) to access header fields. Instead they must use the fdt_get_header() or fdt_set_header() macros, or the fdt_magic(), fdt_totalsize() etc. wrappers around them which are safer, since they will always handle endian conversion. With this change, the whole-tree moving, or manipulating functions: fdt_move(), fdt_open_into() and fdt_pack() no longer need to return a pointer to the "new" tree. The given (void *) buffer pointer they take can instead be used directly by the caller as the new tree. Those functions are thus changed to instead return an error code (which in turn reduces the number of functions using the ugly encoding of error values into pointers). Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
18 years ago
fdt1 = buf;
err = fdt_move(fdt, fdt1, bufsize);
if (err)
libfdt: Implement fdt_move() Implement the fdt_move() function for copying/moving device trees to a new buffer, or within an existing buffer.
18 years ago
FAIL("Failed to move tree into new buffer: %s",
fdt_strerror(err));
sprintf(outname, "moved.%s", inname);
save_blob(outname, fdt1);
libfdt: Use void * to refer to device tree blobs At present, the blob containing a device tree is passed to the various fdt_*() functions as a (struct fdt_header *) i.e. a pointer to the header structure at the beginning of the blob. This patch changes all the functions so that they instead take a (void *) pointing to the blob. Under some circumstances can avoid the need for the caller to cast a blob pointer into a (struct fdt_header *) before passing it to the fdt_*() functions. Using a (void *) also reduce the temptation for users of the library to directly dereference toe (struct fdt_header *) to access header fields. Instead they must use the fdt_get_header() or fdt_set_header() macros, or the fdt_magic(), fdt_totalsize() etc. wrappers around them which are safer, since they will always handle endian conversion. With this change, the whole-tree moving, or manipulating functions: fdt_move(), fdt_open_into() and fdt_pack() no longer need to return a pointer to the "new" tree. The given (void *) buffer pointer they take can instead be used directly by the caller as the new tree. Those functions are thus changed to instead return an error code (which in turn reduces the number of functions using the ugly encoding of error values into pointers). Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
18 years ago
fdt2 = buf + shuntsize;
err = fdt_move(fdt1, fdt2, bufsize-shuntsize);
if (err)
libfdt: Implement fdt_move() Implement the fdt_move() function for copying/moving device trees to a new buffer, or within an existing buffer.
18 years ago
FAIL("Failed to shunt tree %d bytes: %s",
shuntsize, fdt_strerror(err));
sprintf(outname, "shunted.%s", inname);
save_blob(outname, fdt2);
libfdt: Use void * to refer to device tree blobs At present, the blob containing a device tree is passed to the various fdt_*() functions as a (struct fdt_header *) i.e. a pointer to the header structure at the beginning of the blob. This patch changes all the functions so that they instead take a (void *) pointing to the blob. Under some circumstances can avoid the need for the caller to cast a blob pointer into a (struct fdt_header *) before passing it to the fdt_*() functions. Using a (void *) also reduce the temptation for users of the library to directly dereference toe (struct fdt_header *) to access header fields. Instead they must use the fdt_get_header() or fdt_set_header() macros, or the fdt_magic(), fdt_totalsize() etc. wrappers around them which are safer, since they will always handle endian conversion. With this change, the whole-tree moving, or manipulating functions: fdt_move(), fdt_open_into() and fdt_pack() no longer need to return a pointer to the "new" tree. The given (void *) buffer pointer they take can instead be used directly by the caller as the new tree. Those functions are thus changed to instead return an error code (which in turn reduces the number of functions using the ugly encoding of error values into pointers). Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
18 years ago
fdt3 = buf;
err = fdt_move(fdt2, fdt3, bufsize);
if (err)
libfdt: Implement fdt_move() Implement the fdt_move() function for copying/moving device trees to a new buffer, or within an existing buffer.
18 years ago
FAIL("Failed to deshunt tree %d bytes: %s",
shuntsize, fdt_strerror(err));
sprintf(outname, "deshunted.%s", inname);
save_blob(outname, fdt3);
PASS();
}