diff options
Diffstat (limited to 'payloads/libpayload')
| -rw-r--r-- | payloads/libpayload/include/cbfs_core.h | 5 | ||||
| -rw-r--r-- | payloads/libpayload/libcbfs/cbfs_core.c | 21 |
2 files changed, 15 insertions, 11 deletions
diff --git a/payloads/libpayload/include/cbfs_core.h b/payloads/libpayload/include/cbfs_core.h index 1f8b7eec7e..a95cef7a3d 100644 --- a/payloads/libpayload/include/cbfs_core.h +++ b/payloads/libpayload/include/cbfs_core.h @@ -94,12 +94,15 @@ struct cbfs_header { uint32_t version; uint32_t romsize; uint32_t bootblocksize; - uint32_t align; + uint32_t align; /* fixed to 64 bytes */ uint32_t offset; uint32_t architecture; uint32_t pad[1]; } __attribute__((packed)); +/* this used to be flexible, but wasn't ever set to something different. */ +#define CBFS_ALIGNMENT 64 + /* "Unknown" refers to CBFS headers version 1, * before the architecture was defined (i.e., x86 only). */ diff --git a/payloads/libpayload/libcbfs/cbfs_core.c b/payloads/libpayload/libcbfs/cbfs_core.c index 44205f666f..7926d9d650 100644 --- a/payloads/libpayload/libcbfs/cbfs_core.c +++ b/payloads/libpayload/libcbfs/cbfs_core.c @@ -98,7 +98,7 @@ const struct cbfs_header *cbfs_get_header(struct cbfs_media *media) struct cbfs_file *cbfs_get_file(struct cbfs_media *media, const char *name) { const char *file_name; - uint32_t offset, align, romsize, name_len; + uint32_t offset, romsize, name_len; const struct cbfs_header *header; struct cbfs_file file, *file_ptr; struct cbfs_media default_media; @@ -116,7 +116,6 @@ struct cbfs_file *cbfs_get_file(struct cbfs_media *media, const char *name) // Logical offset (for source media) of first file. offset = ntohl(header->offset); - align = ntohl(header->align); romsize = ntohl(header->romsize); // TODO Add a "size" in CBFS header for a platform independent way to @@ -129,13 +128,14 @@ struct cbfs_file *cbfs_get_file(struct cbfs_media *media, const char *name) // fine tune the length to handle alignment positioning. // using (bootblock size) % align, to derive the // number of bytes the bootblock is off from the alignment size. - if ((ntohl(header->bootblocksize) % align)) - romsize -= (align - (ntohl(header->bootblocksize) % align)); + if ((ntohl(header->bootblocksize) % CBFS_ALIGNMENT)) + romsize -= (CBFS_ALIGNMENT - + (ntohl(header->bootblocksize) % CBFS_ALIGNMENT)); else romsize -= 1; #endif - DEBUG("CBFS location: 0x%x~0x%x, align: %d\n", offset, romsize, align); + DEBUG("CBFS location: 0x%x~0x%x\n", offset, romsize); DEBUG("Looking for '%s' starting from 0x%x.\n", name, offset); media->open(media); @@ -143,9 +143,10 @@ struct cbfs_file *cbfs_get_file(struct cbfs_media *media, const char *name) media->read(media, &file, offset, sizeof(file)) == sizeof(file)) { if (memcmp(CBFS_FILE_MAGIC, file.magic, sizeof(file.magic)) != 0) { - uint32_t new_align = align; - if (offset % align) - new_align += align - (offset % align); + uint32_t new_align = CBFS_ALIGNMENT; + if (offset % CBFS_ALIGNMENT) + new_align += CBFS_ALIGNMENT - + (offset % CBFS_ALIGNMENT); ERROR("ERROR: No file header found at 0x%xx - " "try next aligned address: 0x%x.\n", offset, offset + new_align); @@ -179,8 +180,8 @@ struct cbfs_file *cbfs_get_file(struct cbfs_media *media, const char *name) // Move to next file. offset += ntohl(file.len) + ntohl(file.offset); - if (offset % align) - offset += align - (offset % align); + if (offset % CBFS_ALIGNMENT) + offset += CBFS_ALIGNMENT - (offset % CBFS_ALIGNMENT); } media->close(media); LOG("WARNING: '%s' not found.\n", name); |