diff options
| -rw-r--r-- | cpukit/dtc/libfdt/fdt_ro.c | 63 | ||||
| -rw-r--r-- | cpukit/include/libfdt.h | 2 |
2 files changed, 65 insertions, 0 deletions
diff --git a/cpukit/dtc/libfdt/fdt_ro.c b/cpukit/dtc/libfdt/fdt_ro.c index c74b9629af..4ba7c93313 100644 --- a/cpukit/dtc/libfdt/fdt_ro.c +++ b/cpukit/dtc/libfdt/fdt_ro.c @@ -857,3 +857,66 @@ int fdt_node_offset_by_compatible(const void *fdt, int startoffset, return offset; /* error from fdt_next_node() */ } + +int fdt_check_full(const void *fdt, size_t bufsize) +{ + int err; + int num_memrsv; + int offset, nextoffset = 0; + uint32_t tag; + unsigned depth = 0; + const void *prop; + const char *propname; + + if (bufsize < FDT_V1_SIZE) + return -FDT_ERR_TRUNCATED; + err = fdt_check_header(fdt); + if (err != 0) + return err; + if (bufsize < fdt_totalsize(fdt)) + return -FDT_ERR_TRUNCATED; + + num_memrsv = fdt_num_mem_rsv(fdt); + if (num_memrsv < 0) + return num_memrsv; + + while (1) { + offset = nextoffset; + tag = fdt_next_tag(fdt, offset, &nextoffset); + + if (nextoffset < 0) + return nextoffset; + + switch (tag) { + case FDT_NOP: + break; + + case FDT_END: + if (depth != 0) + return -FDT_ERR_BADSTRUCTURE; + return 0; + + case FDT_BEGIN_NODE: + depth++; + if (depth > INT_MAX) + return -FDT_ERR_BADSTRUCTURE; + break; + + case FDT_END_NODE: + if (depth == 0) + return -FDT_ERR_BADSTRUCTURE; + depth--; + break; + + case FDT_PROP: + prop = fdt_getprop_by_offset(fdt, offset, &propname, + &err); + if (!prop) + return err; + break; + + default: + return -FDT_ERR_INTERNAL; + } + } +} diff --git a/cpukit/include/libfdt.h b/cpukit/include/libfdt.h index b81d046e54..79e4d82619 100644 --- a/cpukit/include/libfdt.h +++ b/cpukit/include/libfdt.h @@ -298,6 +298,8 @@ int fdt_move(const void *fdt, void *buf, int bufsize); /* Read-only functions */ /**********************************************************************/ +int fdt_check_full(const void *fdt, size_t bufsize); + /** * fdt_get_string - retrieve a string from the strings block of a device tree * @fdt: pointer to the device tree blob |