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-rw-r--r--util/lbtdump/Makefile14
-rw-r--r--util/lbtdump/README7
-rw-r--r--util/lbtdump/lbtdump.c348
3 files changed, 369 insertions, 0 deletions
diff --git a/util/lbtdump/Makefile b/util/lbtdump/Makefile
new file mode 100644
index 0000000000..f6a4fbd40a
--- /dev/null
+++ b/util/lbtdump/Makefile
@@ -0,0 +1,14 @@
+TARGET=lbtdump
+
+CC=gcc
+CFLAGS=-g -O -Wall
+
+all: $(TARGET)
+
+$(TARGET): *.c
+ $(CC) $(CFLAGS) $< -o $@
+
+clean:
+ rm -f $(TARGET)
+
+
diff --git a/util/lbtdump/README b/util/lbtdump/README
new file mode 100644
index 0000000000..51f8ac4398
--- /dev/null
+++ b/util/lbtdump/README
@@ -0,0 +1,7 @@
+
+lbtdump is a utility to dump the LinuxBIOS table
+to a human readable form.
+
+This needs to be run as root (or setuid) on a system
+running LinuxBIOS.
+
diff --git a/util/lbtdump/lbtdump.c b/util/lbtdump/lbtdump.c
new file mode 100644
index 0000000000..4b5d9dfa65
--- /dev/null
+++ b/util/lbtdump/lbtdump.c
@@ -0,0 +1,348 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/mman.h>
+#include "../../src/include/boot/linuxbios_tables.h"
+
+static inline uint64_t unpack_lb64(struct lb_uint64 value)
+{
+ uint64_t result;
+ result = value.hi;
+ result = (result << 32) + value.lo;
+ return result;
+}
+
+void print_lb_records(struct lb_record *rec, struct lb_record *last, unsigned long addr);
+
+unsigned long compute_checksum(void *addr, unsigned long length)
+{
+ uint8_t *ptr;
+ volatile union {
+ uint8_t byte[2];
+ uint16_t word;
+ } value;
+ unsigned long sum;
+ unsigned long i;
+ /* In the most straight forward way possible,
+ * compute an ip style checksum.
+ */
+ sum = 0;
+ ptr = addr;
+ for(i = 0; i < length; i++) {
+ unsigned long value;
+ value = ptr[i];
+ if (i & 1) {
+ value <<= 8;
+ }
+ /* Add the new value */
+ sum += value;
+ /* Wrap around the carry */
+ if (sum > 0xFFFF) {
+ sum = (sum + (sum >> 16)) & 0xFFFF;
+ }
+ }
+ value.byte[0] = sum & 0xff;
+ value.byte[1] = (sum >> 8) & 0xff;
+ return (~value.word) & 0xFFFF;
+}
+
+#define for_each_lbrec(head, rec) \
+ for(rec = (struct lb_record *)(((char *)head) + sizeof(*head)); \
+ (((char *)rec) < (((char *)head) + sizeof(*head) + head->table_bytes)) && \
+ (rec->size >= 1) && \
+ ((((char *)rec) + rec->size) <= (((char *)head) + sizeof(*head) + head->table_bytes)); \
+ rec = (struct lb_record *)(((char *)rec) + rec->size))
+
+
+static int count_lb_records(struct lb_header *head)
+{
+ struct lb_record *rec;
+ int count;
+ count = 0;
+ for_each_lbrec(head, rec) {
+ count++;
+ }
+ return count;
+}
+
+
+struct lb_header *find_lb_table(void *base, unsigned long start, unsigned long end)
+{
+ unsigned long addr;
+ /* For now be stupid.... */
+ for(addr = start; addr < end; addr += 16) {
+ struct lb_header *head = (struct lb_header *)(((char*)base) + addr);
+ struct lb_record *recs = (struct lb_record *)(((char*)base) + addr + sizeof(*head));
+ if (memcmp(head->signature, "LBIO", 4) != 0)
+ continue;
+ fprintf(stdout, "Found canidate at: %08lx-%08lx\n",
+ addr, addr + head->table_bytes);
+ if (head->header_bytes != sizeof(*head)) {
+ fprintf(stderr, "Header bytes of %d are incorrect\n",
+ head->header_bytes);
+ continue;
+ }
+ if (count_lb_records(head) != head->table_entries) {
+ fprintf(stderr, "bad record count: %d\n",
+ head->table_entries);
+ continue;
+ }
+ if (compute_checksum((unsigned char *)head, sizeof(*head)) != 0) {
+ fprintf(stderr, "bad header checksum\n");
+ continue;
+ }
+ if (compute_checksum(recs, head->table_bytes)
+ != head->table_checksum) {
+ fprintf(stderr, "bad table checksum: %04x\n",
+ head->table_checksum);
+ continue;
+ }
+ fprintf(stdout, "Found LinuxBIOS table at: %08lx\n", addr);
+ return head;
+
+ };
+ return 0;
+}
+
+void nop_print(struct lb_record *rec, unsigned long addr)
+{
+ return;
+}
+
+void pretty_print_number(FILE *stream, uint64_t value)
+{
+ if (value > 1024ULL*1024*1024*1024*1024*1024) {
+ value /= 1024ULL*1024*1024*1024*1024*1024;
+ fprintf(stream, "%ldEB", value);
+ }
+ else if (value > 1024ULL*1024*1024*1024*1024) {
+ value /= 1024ULL*1024*1024*1024*1024;
+ fprintf(stream, "%ldPB", value);
+ }
+ else if (value > 1024ULL*1024*1024*1024) {
+ value /= 1024ULL*1024*1024*1024;
+ fprintf(stream, "%ldTB", value);
+ }
+ else if (value > 1024ULL*1024*1024) {
+ value /= 1024ULL*1024*1024;
+ fprintf(stream, "%ldGB", value);
+ }
+ else if (value > 1024ULL*1024) {
+ value /= 1024ULL*1024;
+ fprintf(stream, "%ldMB", value);
+ }
+ else if (value > 1024ULL) {
+ value /= 1024ULL;
+ fprintf(stream, "%ldKB", value);
+ }
+ else {
+ fprintf(stream, "%ldB", value);
+ }
+}
+
+void print_memory(struct lb_record *ptr, unsigned long addr)
+{
+ struct lb_memory *rec = (void *)ptr;
+ int entries;
+ int i;
+ entries = (rec->size - sizeof(*rec))/sizeof(rec->map[0]);
+ for(i = 0; i < entries; i++) {
+ char *mem_type;
+ uint64_t start;
+ uint64_t end;
+ start = unpack_lb64(rec->map[i].start);
+ end = start + unpack_lb64(rec->map[i].size);
+ switch(rec->map[i].type) {
+ case 1: mem_type = "ram"; break;
+ case 3: mem_type = "acpi"; break;
+ case 4: mem_type = "nvs"; break;
+ default:
+ case 2: mem_type = "reserved"; break;
+ }
+ printf("0x%08lx - 0x%08lx %s (",
+ start, end, mem_type);
+ pretty_print_number(stdout, start);
+ printf(" - ");
+ pretty_print_number(stdout, end);
+ printf(")\n");
+ }
+}
+
+void print_mainboard(struct lb_record *ptr, unsigned long addr)
+{
+ struct lb_mainboard *rec;
+ int max_size;
+ rec = (struct lb_mainboard *)ptr;
+ max_size = rec->size - sizeof(*rec);
+ printf("vendor: %.*s part number: %.*s\n",
+ max_size - rec->vendor_idx, rec->strings + rec->vendor_idx,
+ max_size - rec->part_number_idx, rec->strings + rec->part_number_idx);
+}
+
+void print_string(struct lb_record *ptr, unsigned long addr)
+{
+ struct lb_string *rec;
+ int max_size;
+ rec = (struct lb_string *)ptr;
+ max_size = rec->size - sizeof(*rec);
+ printf("%.*s\n", max_size, rec->string);
+}
+
+void print_option_table(struct lb_record *ptr, unsigned long addr)
+{
+ struct lb_record *rec, *last;
+ struct cmos_option_table *hdr;
+ hdr = (struct cmos_option_table *)ptr;
+ rec = (struct lb_record *)(((char *)hdr) + hdr->header_length);
+ last = (struct lb_record *)(((char *)hdr) + hdr->size);
+ printf("cmos option header record = type %d, size %d, header length %d\n",
+ hdr->tag, hdr->size, hdr->header_length);
+ print_lb_records(rec, last, addr + hdr->header_length);
+#if 0
+ {
+ unsigned char *data = (unsigned char *)ptr;
+ int i;
+ for(i = 0; i < hdr->size; i++) {
+ if ((i %10) == 0 ) {
+ fprintf(stderr, "\n\t");
+ }
+ fprintf(stderr, "0x%02x,", data[i]);
+ }
+ }
+#endif
+
+}
+
+void print_option(struct lb_record *ptr, unsigned long addr)
+{
+ struct cmos_entries *rec;
+ rec= (struct cmos_entries *)ptr;
+ printf("entry %d, rec len %d, start %d, length %d, conf %d, id %d, %s\n",
+ rec->tag, rec->size, rec->bit, rec->length,
+ rec->config, rec->config_id, rec->name);
+}
+
+void print_option_enumeration(struct lb_record *ptr, unsigned long addr)
+{
+ struct cmos_enums *rec;
+ rec = (struct cmos_enums *)ptr;
+ printf("enumeration %d, rec len %d, id %d, value %d, %s\n",
+ rec->tag, rec->size, rec->config_id, rec->value,
+ rec->text);
+}
+
+void print_option_checksum(struct lb_record *ptr, unsigned long addr)
+{
+ struct cmos_checksum *rec;
+ rec = (struct cmos_checksum *)ptr;
+ printf("checksum %d, rec len %d, range %d-%d location %d type %d\n",
+ rec->tag, rec->size,
+ rec->range_start, rec->range_end, rec->location, rec->type);
+}
+
+struct {
+ uint32_t type;
+ char *type_name;
+ void (*print)(struct lb_record *rec, unsigned long addr);
+} lb_types[] = {
+ { LB_TAG_UNUSED, "Unused", nop_print },
+ { LB_TAG_MEMORY, "Memory", print_memory },
+ { LB_TAG_HWRPB, "HWRPB", nop_print },
+ { LB_TAG_MAINBOARD, "Mainboard", print_mainboard },
+ { LB_TAG_VERSION, "Version", print_string },
+ { LB_TAG_EXTRA_VERSION, "Extra Version", print_string },
+ { LB_TAG_BUILD, "Build", print_string },
+ { LB_TAG_COMPILE_TIME, "Compile Time", print_string },
+ { LB_TAG_COMPILE_BY, "Compile By", print_string },
+ { LB_TAG_COMPILE_HOST, "Compile Host", print_string },
+ { LB_TAG_COMPILE_DOMAIN, "Compile Domain", print_string },
+ { LB_TAG_COMPILER, "Compiler", print_string },
+ { LB_TAG_LINKER, "Linker", print_string },
+ { LB_TAG_ASSEMBLER, "Assembler", print_string },
+ { LB_TAG_CMOS_OPTION_TABLE, "CMOS option table", print_option_table },
+ { LB_TAG_OPTION, "Option", print_option },
+ { LB_TAG_OPTION_ENUM, "Option Enumeration", print_option_enumeration },
+ { LB_TAG_OPTION_DEFAULTS, "Option Defaults", nop_print },
+ { LB_TAG_OPTION_CHECKSUM, "Option Checksum", print_option_checksum },
+ { -1, "Unknown", 0 }
+};
+
+static struct lb_record *next_record(struct lb_record *rec)
+{
+ return (struct lb_record *)(((char *)rec) + rec->size);
+}
+
+void print_lb_records(struct lb_record *rec, struct lb_record *last,
+ unsigned long addr)
+{
+ struct lb_record *next;
+ int i;
+ int count;
+ count = 0;
+
+ for(next = next_record(rec); (rec < last) && (next <= last);
+ rec = next, addr += rec->size) {
+ next = next_record(rec);
+ count++;
+ for(i = 0; lb_types[i].print != 0; i++) {
+ if (lb_types[i].type == rec->tag) {
+ break;
+ }
+ }
+ printf("lb_record #%d type %d @ 0x%08lx %s\n",
+ count, rec->tag, addr, lb_types[i].type_name);
+ if (lb_types[i].print) {
+ lb_types[i].print(rec, addr);
+ }
+ }
+}
+
+void print_lb_table(struct lb_header *head, unsigned long addr)
+{
+ struct lb_record *rec, *last;
+
+ rec = (struct lb_record *)(((char *)head) + head->header_bytes);
+ last = (struct lb_record *)(((char *)rec) + head->table_bytes);
+
+ printf("LinuxBIOS header(%d) checksum: %04x table(%d) checksum: %04x entries: %d\n",
+ head->header_bytes, head->header_checksum,
+ head->table_bytes, head->table_checksum, head->table_entries);
+ print_lb_records(rec, last, addr + head->header_bytes);
+}
+
+int main(int argc, char **argv)
+{
+ unsigned char *low_1MB;
+ struct lb_header *lb_table;
+ int fd;
+ fd = open("/dev/mem", O_RDONLY);
+ if (fd < 0) {
+ fprintf(stderr, "Can not open /dev/mem\n");
+ exit(-1);
+ }
+ low_1MB = mmap(0, 1024*1024, PROT_READ, MAP_SHARED, fd, 0x00000000);
+ if (low_1MB == ((void *) -1)) {
+ fprintf(stderr, "Can not mmap /dev/mem at %08lx errno(%d):%s\n",
+ 0x00000000UL, errno, strerror(errno));
+ exit(-2);
+ }
+ lb_table = 0;
+ if (!lb_table)
+ lb_table = find_lb_table(low_1MB, 0x00000, 0x1000);
+ if (!lb_table)
+ lb_table = find_lb_table(low_1MB, 0xf0000, 1024*1024);
+ if (lb_table) {
+ unsigned long addr;
+ addr = ((char *)lb_table) - ((char *)low_1MB);
+ print_lb_table(lb_table, addr);
+ }
+ else {
+ printf("lb_table not found\n");
+ }
+ return 0;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 21:35:11 +0000