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author | Gabe Black <gabeblack@google.com> | 2012-01-27 00:33:47 -0800 |
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committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2012-04-02 18:39:08 +0200 |
commit | e1bb49e2ece1eda6a3d566b48b7a8e50a3469f63 (patch) | |
tree | c26d5c701a82d620aa87dfae071571faee200a3d /util/cbfstool/common.c | |
parent | dd30acdd590f6a39a5d3c4a38e3d949e73b5e2fa (diff) | |
download | coreboot-e1bb49e2ece1eda6a3d566b48b7a8e50a3469f63.tar.xz |
Add a "remove" command to cbfstool
This command removes the first file it finds with the given name by changing
its type to CBFS_COMPONENT_NULL and setting the first character of its name to
a null terminator. If the "files" immediately before or after the target file
are already marked as empty, they're all merged together into one large file.
Change-Id: Idc6b2a4c355c3f039c2ccae81866e3ed6035539b
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-by: Ronald G. Minnich <rminnich@google.com>
Reviewed-on: http://review.coreboot.org/814
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'util/cbfstool/common.c')
-rw-r--r-- | util/cbfstool/common.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/util/cbfstool/common.c b/util/cbfstool/common.c index df744217d4..49da7aea6c 100644 --- a/util/cbfstool/common.c +++ b/util/cbfstool/common.c @@ -350,6 +350,62 @@ int add_file_to_cbfs(void *content, uint32_t contentsize, uint32_t location) return 1; } + +static struct cbfs_file *merge_adjacent_files(struct cbfs_file *first, + struct cbfs_file *second) +{ + uint32_t new_length = + ntohl(first->len) + ntohl(second->len) + ntohl(second->offset); + first->len = htonl(new_length); + first->checksum = 0; // FIXME? + return first; +} + +static struct cbfs_file *next_file(struct cbfs_file *prev) +{ + uint32_t pos = (prev == NULL) ? phys_start : + ALIGN(virt_to_phys(prev) + ntohl(prev->len) + ntohl(prev->offset), + align); + + for (; pos < phys_end; pos += align) { + if (cbfs_file_header(pos)) + return (struct cbfs_file *)phys_to_virt(pos); + } + return NULL; +} + + +int remove_file_from_cbfs(const char *filename) +{ + struct cbfs_file *prev = NULL; + struct cbfs_file *cur = next_file(prev); + struct cbfs_file *next = next_file(cur); + for (; cur; prev = cur, cur = next, next = next_file(next)) { + + /* Check if this is the file to remove. */ + char *name = (char *)cur + sizeof(*cur); + if (strcmp(name, filename)) + continue; + + /* Mark the file as free space and erase its name. */ + cur->type = CBFS_COMPONENT_NULL; + name[0] = '\0'; + + /* Merge it with the previous file if possible. */ + if (prev && prev->type == CBFS_COMPONENT_NULL) + cur = merge_adjacent_files(prev, cur); + + /* Merge it with the next file if possible. */ + if (next && next->type == CBFS_COMPONENT_NULL) + merge_adjacent_files(cur, next); + + return 0; + } + printf("CBFS file %s not found.\n", filename); + return 1; +} + + /* returns new data block with cbfs_file header, suitable to dump into the ROM. location returns the new location that points to the cbfs_file header */ void *create_cbfs_file(const char *filename, void *data, uint32_t * datasize, |