diff options
Diffstat (limited to 'scripts/dtc/fdtdump.c')
| -rw-r--r-- | scripts/dtc/fdtdump.c | 136 |
1 files changed, 36 insertions, 100 deletions
diff --git a/scripts/dtc/fdtdump.c b/scripts/dtc/fdtdump.c index 95a6a20160..7d460a50b5 100644 --- a/scripts/dtc/fdtdump.c +++ b/scripts/dtc/fdtdump.c @@ -1,17 +1,16 @@ +// SPDX-License-Identifier: GPL-2.0 /* * fdtdump.c - Contributed by Pantelis Antoniou <pantelis.antoniou AT gmail.com> */ -#include <stdbool.h> #include <stdint.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <ctype.h> -#include <libfdt.h> -#include <libfdt_env.h> #include <fdt.h> +#include <libfdt_env.h> #include "util.h" @@ -19,29 +18,33 @@ #define PALIGN(p, a) ((void *)(ALIGN((unsigned long)(p), (a)))) #define GET_CELL(p) (p += 4, *((const uint32_t *)(p-4))) -static const char *tagname(uint32_t tag) +static void print_data(const char *data, int len) { - static const char * const names[] = { -#define TN(t) [t] = #t - TN(FDT_BEGIN_NODE), - TN(FDT_END_NODE), - TN(FDT_PROP), - TN(FDT_NOP), - TN(FDT_END), -#undef TN - }; - if (tag < ARRAY_SIZE(names)) - if (names[tag]) - return names[tag]; - return "FDT_???"; + int i; + const char *p = data; + + /* no data, don't print */ + if (len == 0) + return; + + if (util_is_printable_string(data, len)) { + printf(" = \"%s\"", (const char *)data); + } else if ((len % 4) == 0) { + printf(" = <"); + for (i = 0; i < len; i += 4) + printf("0x%08x%s", fdt32_to_cpu(GET_CELL(p)), + i < (len - 4) ? " " : ""); + printf(">"); + } else { + printf(" = ["); + for (i = 0; i < len; i++) + printf("%02x%s", *p++, i < len - 1 ? " " : ""); + printf("]"); + } } -#define dumpf(fmt, args...) \ - do { if (debug) printf("// " fmt, ## args); } while (0) - -static void dump_blob(void *blob, bool debug) +static void dump_blob(void *blob) { - uintptr_t blob_off = (uintptr_t)blob; struct fdt_header *bph = blob; uint32_t off_mem_rsvmap = fdt32_to_cpu(bph->off_mem_rsvmap); uint32_t off_dt = fdt32_to_cpu(bph->off_dt_struct); @@ -88,15 +91,14 @@ static void dump_blob(void *blob, bool debug) if (addr == 0 && size == 0) break; - printf("/memreserve/ %#llx %#llx;\n", + printf("/memreserve/ %llx %llx;\n", (unsigned long long)addr, (unsigned long long)size); } p = p_struct; while ((tag = fdt32_to_cpu(GET_CELL(p))) != FDT_END) { - dumpf("%04zx: tag: 0x%08x (%s)\n", - (uintptr_t)p - blob_off - 4, tag, tagname(tag)); + /* printf("tag: 0x%08x (%d)\n", tag, p - p_struct); */ if (tag == FDT_BEGIN_NODE) { s = p; @@ -135,93 +137,27 @@ static void dump_blob(void *blob, bool debug) p = PALIGN(p + sz, 4); - dumpf("%04zx: string: %s\n", (uintptr_t)s - blob_off, s); - dumpf("%04zx: value\n", (uintptr_t)t - blob_off); printf("%*s%s", depth * shift, "", s); - utilfdt_print_data(t, sz); + print_data(t, sz); printf(";\n"); } } -/* Usage related data. */ -static const char usage_synopsis[] = "fdtdump [options] <file>"; -static const char usage_short_opts[] = "ds" USAGE_COMMON_SHORT_OPTS; -static struct option const usage_long_opts[] = { - {"debug", no_argument, NULL, 'd'}, - {"scan", no_argument, NULL, 's'}, - USAGE_COMMON_LONG_OPTS -}; -static const char * const usage_opts_help[] = { - "Dump debug information while decoding the file", - "Scan for an embedded fdt in file", - USAGE_COMMON_OPTS_HELP -}; int main(int argc, char *argv[]) { - int opt; - const char *file; char *buf; - bool debug = false; - bool scan = false; - off_t len; - - while ((opt = util_getopt_long()) != EOF) { - switch (opt) { - case_USAGE_COMMON_FLAGS - case 'd': - debug = true; - break; - case 's': - scan = true; - break; - } - } - if (optind != argc - 1) - usage("missing input filename"); - file = argv[optind]; - - buf = utilfdt_read_len(file, &len); - if (!buf) - die("could not read: %s\n", file); - - /* try and locate an embedded fdt in a bigger blob */ - if (scan) { - unsigned char smagic[4]; - char *p = buf; - char *endp = buf + len; - - fdt_set_magic(smagic, FDT_MAGIC); - - /* poor man's memmem */ - while (true) { - p = memchr(p, smagic[0], endp - p - 4); - if (!p) - break; - if (fdt_magic(p) == FDT_MAGIC) { - /* try and validate the main struct */ - off_t this_len = endp - p; - fdt32_t max_version = 17; - if (fdt_version(p) <= max_version && - fdt_last_comp_version(p) < max_version && - fdt_totalsize(p) < this_len && - fdt_off_dt_struct(p) < this_len && - fdt_off_dt_strings(p) < this_len) - break; - if (debug) - printf("%s: skipping fdt magic at offset %#zx\n", - file, p - buf); - } - ++p; - } - if (!p) - die("%s: could not locate fdt magic\n", file); - printf("%s: found fdt at offset %#zx\n", file, p - buf); - buf = p; + if (argc < 2) { + fprintf(stderr, "supply input filename\n"); + return 5; } - dump_blob(buf, debug); + buf = utilfdt_read(argv[1]); + if (buf) + dump_blob(buf); + else + return 10; return 0; } |