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authorRonald G. Minnich <rminnich@google.com>2014-01-06 08:38:15 -0800
committerRonald G. Minnich <rminnich@gmail.com>2014-02-02 23:48:18 +0100
commitb5adeee1cc961da60fe72e3226d3a0aeb60306e4 (patch)
treef20d8abcf9492a540ce21082bae6b077d108c901
parenta8a133ded34d82a7baa9a439969eae780a501992 (diff)
downloadcoreboot-b5adeee1cc961da60fe72e3226d3a0aeb60306e4.tar.xz
cbfstool: add code to serialize the header using the new xdr functions
This change adds a header serialization function. Programmers can thus just set up a header as needed, without worrying about forgetting if and how to use the [hn]to[hn]* functions. In the long term, we will work to remove swab.h, i.e. we need to get to the point where programmers don't have to try to remember [hn]to[nh]* and where it goes. To date, even the best programmers we have have made an error with those functions, and those errors have persisted for 6 or 7 years now. It's very easy to make that mistake. BUG=None TEST=Build a peppy image and verify that it's bit for bit the same. All chromebooks use this code and build and boot correctly. BRANCH=None Change-Id: I0f9b8e7cac5f52d0ea330ba948650fa0803aa0d5 Signed-off-by: Ronald G. Minnich <rminnich@google.com> Reviewed-on: https://chromium-review.googlesource.com/181552 Reviewed-by: Ronald Minnich <rminnich@chromium.org> Commit-Queue: Ronald Minnich <rminnich@chromium.org> Tested-by: Ronald Minnich <rminnich@chromium.org> Reviewed-on: http://review.coreboot.org/5100 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
-rw-r--r--util/cbfstool/cbfs_image.c41
-rw-r--r--util/cbfstool/cbfs_image.h4
2 files changed, 32 insertions, 13 deletions
diff --git a/util/cbfstool/cbfs_image.c b/util/cbfstool/cbfs_image.c
index 363691ff48..dddd480cc2 100644
--- a/util/cbfstool/cbfs_image.c
+++ b/util/cbfstool/cbfs_image.c
@@ -139,6 +139,21 @@ static int cbfs_fix_legacy_size(struct cbfs_image *image)
return 0;
}
+void cbfs_put_header(void *dest, const struct cbfs_header *header)
+{
+ struct buffer outheader;
+
+ outheader.data = dest;
+ outheader.size = 0;
+
+ xdr_be.put32(&outheader, header->magic);
+ xdr_be.put32(&outheader, header->version);
+ xdr_be.put32(&outheader, header->romsize);
+ xdr_be.put32(&outheader, header->bootblocksize);
+ xdr_be.put32(&outheader, header->align);
+ xdr_be.put32(&outheader, header->offset);
+ xdr_be.put32(&outheader, header->architecture);
+}
int cbfs_image_create(struct cbfs_image *image,
uint32_t myarch,
size_t size,
@@ -148,7 +163,7 @@ int cbfs_image_create(struct cbfs_image *image,
int32_t header_offset,
int32_t entries_offset)
{
- struct cbfs_header *header;
+ struct cbfs_header header;
struct cbfs_file *entry;
uint32_t cbfs_len;
size_t entry_header_len;
@@ -156,7 +171,7 @@ int cbfs_image_create(struct cbfs_image *image,
DEBUG("cbfs_image_create: bootblock=0x%x+0x%zx, "
"header=0x%x+0x%zx, entries_offset=0x%x\n",
bootblock_offset, bootblock->size,
- header_offset, sizeof(*header), entries_offset);
+ header_offset, sizeof(header), entries_offset);
if (buffer_create(&image->buffer, size, "(new)") != 0)
return -1;
@@ -194,20 +209,20 @@ int cbfs_image_create(struct cbfs_image *image,
bootblock->size);
// Prepare header
- if (header_offset + sizeof(*header) > size) {
+ if (header_offset + sizeof(header) > size) {
ERROR("Header (0x%x+0x%zx) exceed ROM size (0x%zx)\n",
- header_offset, sizeof(*header), size);
+ header_offset, sizeof(header), size);
return -1;
}
- header = (struct cbfs_header *)(image->buffer.data + header_offset);
- image->header = header;
- header->magic = htonl(CBFS_HEADER_MAGIC);
- header->version = htonl(CBFS_HEADER_VERSION);
- header->romsize = htonl(size);
- header->bootblocksize = htonl(bootblock->size);
- header->align = htonl(align);
- header->offset = htonl(entries_offset);
- header->architecture = htonl(myarch);
+ image->header = (struct cbfs_header *)(image->buffer.data + header_offset);
+ header.magic = CBFS_HEADER_MAGIC;
+ header.version = CBFS_HEADER_VERSION;
+ header.romsize = size;
+ header.bootblocksize = bootblock->size;
+ header.align = align;
+ header.offset = entries_offset;
+ header.architecture = myarch;
+ cbfs_put_header(image->header, &header);
// Prepare entries
if (align_up(entries_offset, align) != entries_offset) {
diff --git a/util/cbfstool/cbfs_image.h b/util/cbfstool/cbfs_image.h
index 7ad418aee5..8ea4e47519 100644
--- a/util/cbfstool/cbfs_image.h
+++ b/util/cbfstool/cbfs_image.h
@@ -31,6 +31,10 @@ struct cbfs_image {
struct cbfs_header *header;
};
+/* Given a pointer, serialize the header from host-native byte format
+ * to cbfs format, i.e. big-endian. */
+void cbfs_put_header(void *dest, const struct cbfs_header *header);
+
/* Creates an empty CBFS image by given size, and description to its content
* (bootblock, align, header location, starting offset of CBFS entries.
* The output image will contain a valid cbfs_header, with one cbfs_file