Ronald G. Minnich (rminnich@gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/5100
-gerrit
commit b22f55c26fc83bcfffa3b788b772b341b41c4c82 Author: Ronald G. Minnich rminnich@google.com Date: Mon Jan 6 08:38:15 2014 -0800
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 --- util/cbfstool/cbfs_image.c | 41 ++++++++++++++++++++++++++++------------- util/cbfstool/cbfs_image.h | 4 ++++ 2 files changed, 32 insertions(+), 13 deletions(-)
diff --git a/util/cbfstool/cbfs_image.c b/util/cbfstool/cbfs_image.c index 363691f..d453899 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, 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 = architecture; + 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 7ad418a..74c8f97 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, 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