The IMD code should be readonly and never modify any pointers. Make all pointers const so that const pointers can be passed in to IMD. Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> --- common/bbu.c | 4 ++-- common/imd.c | 27 ++++++++++++++------------- include/bbu.h | 2 +- include/image-metadata.h | 21 +++++++++++---------- 4 files changed, 28 insertions(+), 26 deletions(-) diff --git a/common/bbu.c b/common/bbu.c index 3b372263b1..11e44f4a7d 100644 --- a/common/bbu.c +++ b/common/bbu.c @@ -159,7 +159,7 @@ static int bbu_check_of_compat(struct bbu_data *data) struct device_node *root_node; const char *machine, *str; int ret; - struct imd_header *of_compat; + const struct imd_header *of_compat; if (!IS_ENABLED(CONFIG_OFDEVICE) || !IS_ENABLED(CONFIG_IMD)) return 0; @@ -191,7 +191,7 @@ static int bbu_check_of_compat(struct bbu_data *data) static int bbu_check_metadata(struct bbu_data *data) { - struct imd_header *imd; + const struct imd_header *imd; int ret; char *str; diff --git a/common/imd.c b/common/imd.c index a8a10fc9bb..05e118e773 100644 --- a/common/imd.c +++ b/common/imd.c @@ -35,7 +35,7 @@ int imd_command_setenv(const char *variable_name, const char *value) * imd_next - return a pointer to the next metadata field. * @imd The current metadata field */ -struct imd_header *imd_next(struct imd_header *imd) +const struct imd_header *imd_next(const struct imd_header *imd) { int length; @@ -43,10 +43,11 @@ struct imd_header *imd_next(struct imd_header *imd) length = ALIGN(length, 4); length += 8; - return (void *)imd + length; + return (const void *)imd + length; } -struct imd_header *imd_find_type(struct imd_header *imd, uint32_t type) +const struct imd_header *imd_find_type(const struct imd_header *imd, + uint32_t type) { imd_for_each(imd, imd) if (imd_read_type(imd) == type) @@ -55,10 +56,10 @@ struct imd_header *imd_find_type(struct imd_header *imd, uint32_t type) return NULL; } -static int imd_next_validate(void *buf, int bufsize, int start_ofs) +static int imd_next_validate(const void *buf, int bufsize, int start_ofs) { int length, size; - struct imd_header *imd = buf + start_ofs; + const struct imd_header *imd = buf + start_ofs; size = bufsize - start_ofs; @@ -82,10 +83,10 @@ static int imd_next_validate(void *buf, int bufsize, int start_ofs) return length; } -static int imd_validate_tags(void *buf, int bufsize, int start_ofs) +static int imd_validate_tags(const void *buf, int bufsize, int start_ofs) { int ret; - struct imd_header *imd = buf + start_ofs; + const struct imd_header *imd = buf + start_ofs; while (1) { uint32_t type; @@ -122,7 +123,7 @@ static int imd_validate_tags(void *buf, int bufsize, int start_ofs) * * Return: a pointer to the image metadata or a ERR_PTR */ -struct imd_header *imd_get(void *buf, int size) +const struct imd_header *imd_get(const void *buf, int size) { int start_ofs = 0; int i, ret; @@ -206,7 +207,7 @@ static uint32_t imd_name_to_type(const char *name) * * Return: A pointer to the string or NULL if the string is not found */ -const char *imd_string_data(struct imd_header *imd, int index) +const char *imd_string_data(const struct imd_header *imd, int index) { int i, total = 0, l = 0; int len = imd_read_length(imd); @@ -233,7 +234,7 @@ const char *imd_string_data(struct imd_header *imd, int index) * * Return: A pointer to the string or NULL if the string is not found */ -char *imd_concat_strings(struct imd_header *imd) +char *imd_concat_strings(const struct imd_header *imd) { int i, len = imd_read_length(imd); char *str; @@ -266,9 +267,9 @@ char *imd_concat_strings(struct imd_header *imd) * * Return: A pointer to the value or NULL if the string is not found */ -const char *imd_get_param(struct imd_header *imd, const char *name) +const char *imd_get_param(const struct imd_header *imd, const char *name) { - struct imd_header *cur; + const struct imd_header *cur; int namelen = strlen(name); imd_for_each(imd, cur) { @@ -294,7 +295,7 @@ int imd_command(int argc, char *argv[]) void *buf; size_t size; uint32_t type = IMD_TYPE_INVALID; - struct imd_header *imd_start, *imd; + const struct imd_header *imd_start, *imd; const char *filename; const char *variable_name = NULL; char *str; diff --git a/include/bbu.h b/include/bbu.h index 54434b03e0..a3824e11cf 100644 --- a/include/bbu.h +++ b/include/bbu.h @@ -16,7 +16,7 @@ struct bbu_data { const char *devicefile; size_t len; const char *handler_name; - struct imd_header *imd_data; + const struct imd_header *imd_data; }; struct bbu_handler { diff --git a/include/image-metadata.h b/include/image-metadata.h index 0ba92469a4..8739bffb92 100644 --- a/include/image-metadata.h +++ b/include/image-metadata.h @@ -56,35 +56,36 @@ static inline int imd_type_valid(uint32_t type) return (type & 0xffff0000) == 0x640c0000; } -struct imd_header *imd_next(struct imd_header *imd); +const struct imd_header *imd_next(const struct imd_header *imd); #define imd_for_each(start, imd) \ for (imd = imd_next(start); imd_read_type(imd) != IMD_TYPE_END; imd = imd_next(imd)) -static inline uint32_t imd_read_le32(void *_ptr) +static inline uint32_t imd_read_le32(const void *_ptr) { - uint8_t *ptr = _ptr; + const uint8_t *ptr = _ptr; return ptr[0] | (ptr[1] << 8) | (ptr[2] << 16) | (ptr[3] << 24); } -static inline uint32_t imd_read_type(struct imd_header *imd) +static inline uint32_t imd_read_type(const struct imd_header *imd) { return imd_read_le32(&imd->type); } -static inline uint32_t imd_read_length(struct imd_header *imd) +static inline uint32_t imd_read_length(const struct imd_header *imd) { return imd_read_le32(&imd->datalength); } -struct imd_header *imd_find_type(struct imd_header *imd, uint32_t type); +const struct imd_header *imd_find_type(const struct imd_header *imd, + uint32_t type); -struct imd_header *imd_get(void *buf, int size); -const char *imd_string_data(struct imd_header *imd, int index); +const struct imd_header *imd_get(const void *buf, int size); +const char *imd_string_data(const struct imd_header *imd, int index); const char *imd_type_to_name(uint32_t type); -char *imd_concat_strings(struct imd_header *imd); -const char *imd_get_param(struct imd_header *imd, const char *name); +char *imd_concat_strings(const struct imd_header *imd); +const char *imd_get_param(const struct imd_header *imd, const char *name); extern int imd_command_verbose; int imd_command_setenv(const char *variable_name, const char *value); -- 2.15.1 _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox