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cbfstool: Add way to access entire backing data for a buffer 

This is required to handle certain relative-to-flash-start offsets.

BUG=none
BRANCH=tot
TEST=none

Change-Id: I8b30c7b532e330af5db4b8ed65b21774c6cbbd25
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 596ba1aaa62aedb2b214ca55444e3068b9cb1044
Original-Change-Id: Idc9a5279f16951befec4d84aab35117988f7edb7
Original-Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/312220
Original-Commit-Ready: Patrick Georgi <pgeorgi@chromium.org>
Original-Tested-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/12415
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Patrick Georgi 2015-11-11 18:43:11 +01:00
parent 66aae6d3ba
commit 9b24f7ca9a
2 changed files with 9 additions and 1 deletions
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2
util/cbfstool/common.c
View File

@ -115,7 +115,7 @@ void buffer_delete(struct buffer *buffer)
buffer->name = NULL; buffer->name = NULL;
} }
if (buffer->data) { if (buffer->data) {
free(buffer->data - buffer->offset); free(buffer_get_original_backing(buffer));
buffer->data = NULL; buffer->data = NULL;
} }
buffer->offset = 0; buffer->offset = 0;

8
util/cbfstool/common.h
View File

@ -120,6 +120,14 @@ static inline bool buffer_check_magic(const struct buffer *b, const char *magic,
memcmp(b->data, magic, magic_len) == 0; memcmp(b->data, magic, magic_len) == 0;
} }
/* Returns the start of the underlying buffer, with the offset undone */
static inline void *buffer_get_original_backing(const struct buffer *b)
{
if (!b)
return NULL;
return b->data - b->offset;
}
/* Creates an empty memory buffer with given size. /* Creates an empty memory buffer with given size.
* Returns 0 on success, otherwise non-zero. */ * Returns 0 on success, otherwise non-zero. */
int buffer_create(struct buffer *buffer, size_t size, const char *name); int buffer_create(struct buffer *buffer, size_t size, const char *name);