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-rw-r--r--util/intelvbttool/Makefile5
-rw-r--r--util/intelvbttool/intelvbttool.c913
2 files changed, 806 insertions, 112 deletions
diff --git a/util/intelvbttool/Makefile b/util/intelvbttool/Makefile
index 7d50d30e1a..fb9aadefda 100644
--- a/util/intelvbttool/Makefile
+++ b/util/intelvbttool/Makefile
@@ -15,12 +15,13 @@
PROGRAM = intelvbttool
CC ?= gcc
-CFLAGS ?= -O2
+CFLAGS ?= -O2 -g
CFLAGS += -Wall -Werror
+CFLAGS += -I../../src/commonlib/include
all: $(PROGRAM)
-$(PROGRAM):
+$(PROGRAM): $(PROGRAM).c
$(CC) $(CFLAGS) $(CPPFLAGS) $(PROGRAM).c -o $(PROGRAM)
clean:
diff --git a/util/intelvbttool/intelvbttool.c b/util/intelvbttool/intelvbttool.c
index f0216dd207..c8b973e4f1 100644
--- a/util/intelvbttool/intelvbttool.c
+++ b/util/intelvbttool/intelvbttool.c
@@ -20,7 +20,10 @@
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
+#include <getopt.h>
#include <errno.h>
+#include <stdarg.h>
+#include <commonlib/helpers.h>
typedef uint8_t u8;
typedef uint16_t u16;
@@ -30,11 +33,28 @@ typedef uint32_t u32;
typedef struct {
u16 signature;
u8 size;
- u8 reserved[21];
+ u8 entrypoint[4];
+ u8 checksum;
+ u8 reserved[16];
u16 pcir_offset;
u16 vbt_offset;
} __attribute__ ((packed)) optionrom_header_t;
+typedef struct {
+ u32 signature;
+ u16 vendor;
+ u16 device;
+ u16 reserved1;
+ u16 length;
+ u8 revision;
+ u8 classcode[3];
+ u16 imagelength;
+ u16 coderevision;
+ u8 codetype;
+ u8 indicator;
+ u16 reserved2;
+} __attribute__((packed)) optionrom_pcir_t;
+
struct vbt_header {
u8 signature[20];
u16 version;
@@ -221,6 +241,8 @@ struct bdb_sdvo_lvds_options {
} __attribute__ ((packed));
+static const size_t ignore_checksum = 1;
+
#define BDB_GENERAL_FEATURES 1
#define BDB_GENERAL_DEFINITIONS 2
@@ -233,143 +255,370 @@ struct bdb_sdvo_lvds_options {
#define BDB_SKIP 254
-static void parse_vbt(const void *vbt)
+/* print helpers */
+static void print(const char *format, ...)
+{
+ va_list args;
+ fprintf(stdout, "VBTTOOL: ");
+ va_start(args, format);
+ vfprintf(stdout, format, args);
+ va_end(args);
+}
+
+static void printt(const char *format, ...)
+{
+ va_list args;
+ fprintf(stdout, "\t");
+ va_start(args, format);
+ vfprintf(stdout, format, args);
+ va_end(args);
+}
+
+static void printwarn(const char *format, ...)
+{
+ va_list args;
+ fprintf(stderr, "VBTTOOL: WARN: ");
+ va_start(args, format);
+ vfprintf(stderr, format, args);
+ va_end(args);
+}
+
+static void printerr(const char *format, ...)
+{
+ va_list args;
+ fprintf(stderr, "VBTTOOL: ERR: ");
+ va_start(args, format);
+ vfprintf(stderr, format, args);
+ va_end(args);
+}
+
+struct fileobject {
+ unsigned char *data;
+ size_t size;
+};
+
+/* file object helpers */
+
+/*
+ * Alloc a file object of given size.
+ * Returns NULL on error.
+ */
+static struct fileobject *malloc_fo(const size_t size)
+{
+ struct fileobject *fo;
+ if (!size)
+ return NULL;
+
+ fo = malloc(sizeof(*fo));
+ if (!fo)
+ return NULL;
+ fo->data = malloc(size);
+ if (!fo->data) {
+ free(fo);
+ return NULL;
+ }
+ fo->size = size;
+
+ return fo;
+}
+
+/* Free a fileobject structure */
+static void free_fo(struct fileobject *fo)
+{
+ if (fo) {
+ free(fo->data);
+ free(fo);
+ }
+}
+
+/* Resize file object and keep memory content */
+static struct fileobject *remalloc_fo(struct fileobject *old,
+ const size_t size)
+{
+ struct fileobject *fo = old;
+
+ if (!old || !size)
+ return NULL;
+
+ fo->data = realloc(fo->data, size);
+
+ if (!fo->data)
+ return NULL;
+
+ fo->size = size;
+
+ return fo;
+}
+
+/*
+ * Creates a new subregion copy of fileobject.
+ * Returns NULL if offset is greater than fileobject size.
+ * Returns NULL on error.
+ */
+static struct fileobject *malloc_fo_sub(const struct fileobject *old,
+ const size_t off)
+{
+ struct fileobject *fo;
+
+ if (!old || off > old->size)
+ return NULL;
+
+ fo = malloc_fo(old->size - off);
+ if (!fo)
+ return NULL;
+
+ memcpy(fo->data, old->data + off, fo->size);
+
+ return fo;
+}
+
+/* file helpers */
+
+/* Create fileobject from file */
+static struct fileobject *read_file(const char *filename)
+{
+ FILE *fd = fopen(filename, "rb");
+
+ if (!fd) {
+ printerr("%s open failed: %s\n", filename, strerror(errno));
+ return NULL;
+ }
+
+ if (fseek(fd, 0, SEEK_END)) {
+ printerr("%s seek failed: %s\n", filename, strerror(errno));
+ fclose(fd);
+ return NULL;
+ }
+
+ const off_t size = ftell(fd);
+ if (size < 0 || size > SIZE_MAX) {
+ printerr("%s tell failed: %s\n", filename, strerror(errno));
+ fclose(fd);
+ return NULL;
+ }
+
+ if (fseek(fd, 0, SEEK_SET)) {
+ printerr("%s seek failed: %s\n", filename, strerror(errno));
+ fclose(fd);
+ return NULL;
+ }
+
+ struct fileobject *fo = malloc_fo(size);
+ if (!fo) {
+ printerr("malloc failed\n");
+ fclose(fd);
+ return NULL;
+ }
+
+ if (fread(fo->data, 1, size, fd) != size) {
+ fclose(fd);
+ free_fo(fo);
+ return NULL;
+ }
+
+ if (fclose(fd)) {
+ printerr("%s close failed: %s\n", filename, strerror(errno));
+ free_fo(fo);
+ return NULL;
+ }
+
+ fo->size = size;
+
+ return fo;
+}
+
+/* Create fileobject from physical memory at given address of size 64 KiB */
+static struct fileobject *read_physmem(size_t addr)
+{
+ const int fd = open("/dev/mem", O_RDONLY);
+ const size_t size = 64 * 2 * KiB;
+ if (fd < 0) {
+ printerr("/dev/mem open failed: %s\n", strerror(errno));
+ return NULL;
+ }
+
+ const void *data = mmap(0, size, PROT_READ, MAP_SHARED, fd, addr);
+ if (data == MAP_FAILED) {
+ close(fd);
+ printerr("mmap failed: %s\n", strerror(errno));
+ return NULL;
+ }
+
+ struct fileobject *fo = malloc_fo(size);
+ if (!fo) {
+ printerr("malloc failed\n");
+ munmap((void *)data, size);
+ close(fd);
+ return NULL;
+ }
+
+ memcpy(fo->data, data, size);
+ munmap((void *)data, size);
+
+ if (close(fd)) {
+ printerr("/dev/mem close failed: %s\n", strerror(errno));
+ free_fo(fo);
+ return NULL;
+ }
+
+ return fo;
+}
+
+/* Write fileobject contents to file */
+static int write_file(const char *filename, const struct fileobject *fo)
{
- const struct vbt_header *head = vbt;
+ FILE *fd_out = fopen(filename, "wb");
+
+ if (!fd_out) {
+ printerr("%s open failed: %s\n", filename, strerror(errno));
+ return 1;
+ }
+ if (fwrite(fo->data, 1, fo->size, fd_out) != fo->size) {
+ fclose(fd_out);
+ return 1;
+ }
+ return fclose(fd_out);
+}
+
+/* dump VBT contents in human readable form */
+static void dump_vbt(const struct fileobject *fo)
+{
+ if (fo->size < sizeof(struct vbt_header))
+ return;
+
+ const struct vbt_header *head = (const struct vbt_header *)fo->data;
const struct bdb_header *bdb;
- int i;
const u8 *ptr;
+ int i;
int is_first_skip = 1;
- if (memcmp(head->signature, "$VBT", 4) != 0) {
- fprintf(stderr, "invalid VBT signature\n");
- exit(1);
- }
- printf("signature: <%20.20s>\n", head->signature);
- printf("version: %d.%02d\n", head->version / 100,
+ printt("signature: <%20.20s>\n", head->signature);
+ printt("version: %d.%02d\n", head->version / 100,
head->version % 100);
if (head->header_size != sizeof(struct vbt_header))
- printf("header size: 0x%x\n", head->header_size);
- printf("VBT size: 0x%x\n", head->vbt_size);
- printf("VBT checksum: 0x%x\n", head->vbt_checksum);
+ printt("header size: 0x%x\n", head->header_size);
+ printt("VBT size: 0x%x\n", head->vbt_size);
+ printt("VBT checksum: 0x%x\n", head->vbt_checksum);
if (head->reserved0)
- printf("header reserved0: 0x%x\n", head->reserved0);
+ printt("header reserved0: 0x%x\n", head->reserved0);
if (head->bdb_offset != sizeof(struct vbt_header))
- printf("BDB offset: 0x%x\n", head->bdb_offset);
+ printt("BDB offset: 0x%x\n", head->bdb_offset);
for (i = 0; i < 4; i++)
if (head->aim_offset[i])
- printf("AIM[%d] offset: 0x%x\n", i,
+ printt("AIM[%d] offset: 0x%x\n", i,
head->aim_offset[i]);
- bdb = (const void *) ((const char *) vbt + head->bdb_offset);
+ if (head->bdb_offset + sizeof(*bdb) > fo->size)
+ return;
+ bdb = (const void *) (fo->data + head->bdb_offset);
if (memcmp("BIOS_DATA_BLOCK ", bdb->signature, 16) != 0) {
- fprintf(stderr, "invalid BDB signature:%s\n",
+ printerr("invalid BDB signature:%s\n",
bdb->signature);
exit(1);
}
- printf("BDB version: %d.%02d\n", bdb->version / 100,
+ printt("BDB version: %d.%02d\n", bdb->version / 100,
bdb->version % 100);
if (bdb->header_size != sizeof(struct bdb_header))
- printf("BDB header size: 0x%x\n", bdb->header_size);
+ printt("BDB header size: 0x%x\n", bdb->header_size);
if (bdb->bdb_size != head->vbt_size - head->bdb_offset)
- printf("BDB size: 0x%x\n", bdb->bdb_size);
+ printt("BDB size: 0x%x\n", bdb->bdb_size);
for (ptr = (const u8 *) bdb + bdb->header_size;
ptr < (const u8 *) bdb + bdb->bdb_size;) {
u16 secsz = (ptr[1] | (ptr[2] << 8));
u8 sectype = ptr[0];
const u8 *section = ptr + 3;
- printf("section type %d, size 0x%x\n", sectype, secsz);
+ printt("section type %d, size 0x%x\n", sectype, secsz);
ptr += secsz + 3;
switch (sectype) {
case BDB_GENERAL_FEATURES:{
const struct bdb_general_features *sec =
(const void *) section;
- printf("General features:\n");
+ printt("General features:\n");
if (sec->panel_fitting)
- printf("\tpanel_fitting = 0x%x\n",
+ printt("\tpanel_fitting = 0x%x\n",
sec->panel_fitting);
if (sec->flexaim)
- printf("\tflexaim = 0x%x\n",
+ printt("\tflexaim = 0x%x\n",
sec->flexaim);
if (sec->msg_enable)
- printf("\tmsg_enable = 0x%x\n",
+ printt("\tmsg_enable = 0x%x\n",
sec->msg_enable);
if (sec->clear_screen)
- printf("\tclear_screen = 0x%x\n",
+ printt("\tclear_screen = 0x%x\n",
sec->clear_screen);
if (sec->color_flip)
- printf("\tcolor_flip = 0x%x\n",
+ printt("\tcolor_flip = 0x%x\n",
sec->color_flip);
if (sec->download_ext_vbt)
- printf
+ printt
("\tdownload_ext_vbt = 0x%x\n",
sec->download_ext_vbt);
- printf("\t*enable_ssc = 0x%x\n",
+ printt("\t*enable_ssc = 0x%x\n",
sec->enable_ssc);
- printf("\t*ssc_freq = 0x%x\n",
+ printt("\t*ssc_freq = 0x%x\n",
sec->ssc_freq);
if (sec->enable_lfp_on_override)
- printf
+ printt
("\tenable_lfp_on_override = 0x%x\n",
sec->enable_lfp_on_override);
if (sec->disable_ssc_ddt)
- printf
+ printt
("\tdisable_ssc_ddt = 0x%x\n",
sec->disable_ssc_ddt);
if (sec->rsvd7)
- printf("\trsvd7 = 0x%x\n",
+ printt("\trsvd7 = 0x%x\n",
sec->rsvd7);
- printf("\t*display_clock_mode = 0x%x\n",
+ printt("\t*display_clock_mode = 0x%x\n",
sec->display_clock_mode);
if (sec->rsvd8)
- printf("\trsvd8 = 0x%x\n",
+ printt("\trsvd8 = 0x%x\n",
sec->rsvd8);
- printf("\tdisable_smooth_vision = 0x%x\n",
+ printt("\tdisable_smooth_vision = 0x%x\n",
sec->disable_smooth_vision);
if (sec->single_dvi)
- printf("\tsingle_dvi = 0x%x\n",
+ printt("\tsingle_dvi = 0x%x\n",
sec->single_dvi);
if (sec->rsvd9)
- printf("\trsvd9 = 0x%x\n",
+ printt("\trsvd9 = 0x%x\n",
sec->rsvd9);
- printf
+ printt
("\t*fdi_rx_polarity_inverted = 0x%x\n",
sec->fdi_rx_polarity_inverted);
if (sec->rsvd10)
- printf("\trsvd10 = 0x%x\n",
+ printt("\trsvd10 = 0x%x\n",
sec->rsvd10);
if (sec->legacy_monitor_detect)
- printf
+ printt
("\tlegacy_monitor_detect = 0x%x\n",
sec->legacy_monitor_detect);
- printf("\t*int_crt_support = 0x%x\n",
+ printt("\t*int_crt_support = 0x%x\n",
sec->int_crt_support);
- printf("\t*int_tv_support = 0x%x\n",
+ printt("\t*int_tv_support = 0x%x\n",
sec->int_tv_support);
if (sec->int_efp_support)
- printf
+ printt
("\tint_efp_support = 0x%x\n",
sec->int_efp_support);
if (sec->dp_ssc_enb)
- printf("\tdp_ssc_enb = 0x%x\n",
+ printt("\tdp_ssc_enb = 0x%x\n",
sec->dp_ssc_enb);
if (sec->dp_ssc_freq)
- printf("\tdp_ssc_freq = 0x%x\n",
+ printt("\tdp_ssc_freq = 0x%x\n",
sec->dp_ssc_freq);
if (sec->rsvd11)
- printf("\trsvd11 = 0x%x\n",
+ printt("\trsvd11 = 0x%x\n",
sec->rsvd11);
break;
}
case BDB_DRIVER_FEATURES:{
const struct bdb_driver_features *sec =
(const void *) section;
- printf("\t*LVDS config: %d\n",
+ printt("\t*LVDS config: %d\n",
sec->lvds_config);
- printf("\t*Dual frequency: %d\n",
+ printt("\t*Dual frequency: %d\n",
sec->dual_frequency);
break;
@@ -377,7 +626,7 @@ static void parse_vbt(const void *vbt)
case BDB_SDVO_LVDS_OPTIONS:{
const struct bdb_sdvo_lvds_options *sec =
(const void *) section;
- printf("\t*Panel type: %d\n",
+ printt("\t*Panel type: %d\n",
sec->panel_type);
break;
@@ -386,29 +635,29 @@ static void parse_vbt(const void *vbt)
const struct bdb_general_definitions *sec =
(const void *) section;
int ndev;
- printf("\t*CRT DDC GMBUS pin: %d\n",
+ printt("\t*CRT DDC GMBUS pin: %d\n",
sec->crt_ddc_gmbus_pin);
- printf("\tDPMS ACPI: %d\n",
+ printt("\tDPMS ACPI: %d\n",
sec->dpms_acpi);
- printf("\tSkip boot CRT detect: %d\n",
+ printt("\tSkip boot CRT detect: %d\n",
sec->skip_boot_crt_detect);
- printf("\tDPMS aim: %d\n", sec->dpms_aim);
+ printt("\tDPMS aim: %d\n", sec->dpms_aim);
if (sec->rsvd1)
- printf("\trsvd1: 0x%x\n",
+ printt("\trsvd1: 0x%x\n",
sec->rsvd1);
- printf("\tboot_display: { %x, %x }\n",
+ printt("\tboot_display: { %x, %x }\n",
sec->boot_display[0],
sec->boot_display[1]);
if (sec->child_dev_size !=
sizeof(struct common_child_dev_config))
- printf("\tchild_dev_size: %d\n",
+ printt("\tchild_dev_size: %d\n",
sec->child_dev_size);
ndev = (secsz - sizeof(*sec)) /
sizeof(struct common_child_dev_config);
- printf("\t%d devices\n", ndev);
+ printt("\t%d devices\n", ndev);
for (i = 0; i < ndev; i++) {
- printf("\t*device type: %x ",
+ printt("\t*device type: %x ",
sec->devices[i].
device_type);
#define DEVICE_TYPE_INT_LFP 0x1022
@@ -416,35 +665,35 @@ static void parse_vbt(const void *vbt)
#define DEVICE_TYPE_EFP_DVI_HOTPLUG_PWR 0x6052
switch (sec->devices[i].device_type) {
case DEVICE_TYPE_INT_LFP:
- printf("(flat panel)\n");
+ printt("(flat panel)\n");
break;
case DEVICE_TYPE_INT_TV:
- printf("(TV)\n");
+ printt("(TV)\n");
break;
case DEVICE_TYPE_EFP_DVI_HOTPLUG_PWR:
- printf
+ printt
("(DVI)\n");
break;
case 0:
- printf("(Empty)\n");
+ printt("(Empty)\n");
break;
default:
- printf("(Unknown)\n");
+ printt("(Unknown)\n");
break;
}
if (!sec->devices[i].device_type)
continue;
- printf("\t *dvo_port: %x\n",
+ printt("\t *dvo_port: %x\n",
sec->devices[i].dvo_port);
- printf("\t *i2c_pin: %x\n",
+ printt("\t *i2c_pin: %x\n",
sec->devices[i].i2c_pin);
- printf("\t *slave_addr: %x\n",
+ printt("\t *slave_addr: %x\n",
sec->devices[i].slave_addr);
- printf("\t *ddc_pin: %x\n",
+ printt("\t *ddc_pin: %x\n",
sec->devices[i].ddc_pin);
- printf("\t *dvo_wiring: %x\n",
+ printt("\t *dvo_wiring: %x\n",
sec->devices[i].dvo_wiring);
- printf("\t edid_ptr: %x\n",
+ printt("\t edid_ptr: %x\n",
sec->devices[i].edid_ptr);
}
@@ -456,84 +705,528 @@ static void parse_vbt(const void *vbt)
if (!is_first_skip)
break;
is_first_skip = 0;
- printf("\ttype: %x\n", sec->type);
- printf("\trelstage: %x\n", sec->relstage);
- printf("\tchipset: %x\n", sec->chipset);
- printf(sec->lvds_present ? "\tLVDS\n"
+ printt("\ttype: %x\n", sec->type);
+ printt("\trelstage: %x\n", sec->relstage);
+ printt("\tchipset: %x\n", sec->chipset);
+ printt(sec->lvds_present ? "\tLVDS\n"
: "\tNo LVDS\n");
- printf(sec->tv_present ? "\tTV\n"
+ printt(sec->tv_present ? "\tTV\n"
: "\tNo TV\n");
if (sec->rsvd2)
- printf("\trsvd2: 0x%x\n",
+ printt("\trsvd2: 0x%x\n",
sec->rsvd2);
for (i = 0; i < 4; i++)
if (sec->rsvd3[i])
- printf
+ printt
("\trsvd3[%d]: 0x%x\n",
i, sec->rsvd3[i]);
- printf("\tSignon: %.155s\n", sec->signon);
- printf("\tCopyright: %.155s\n",
+ printt("\tSignon: %.155s\n", sec->signon);
+ printt("\tCopyright: %.155s\n",
sec->copyright);
- printf("\tCode segment: %x\n",
+ printt("\tCode segment: %x\n",
sec->code_segment);
- printf("\tDOS Boot mode: %x\n",
+ printt("\tDOS Boot mode: %x\n",
sec->dos_boot_mode);
- printf("\tBandwidth percent: %x\n",
+ printt("\tBandwidth percent: %x\n",
sec->bandwidth_percent);
if (sec->rsvd4)
- printf("\trsvd4: 0x%x\n",
+ printt("\trsvd4: 0x%x\n",
sec->rsvd4);
- printf("\tBandwidth percent: %x\n",
+ printt("\tBandwidth percent: %x\n",
sec->resize_pci_bios);
if (sec->rsvd5)
- printf("\trsvd5: 0x%x\n",
+ printt("\trsvd5: 0x%x\n",
sec->rsvd5);
break;
}
}
}
+}
+
+/* Returns a new fileobject containing a valid VBT */
+static void parse_vbt(const struct fileobject *fo,
+ struct fileobject **vbt)
+{
+ *vbt = NULL;
+
+ if (fo->size < sizeof(struct vbt_header)) {
+ printerr("image is to small\n");
+ return;
+ }
+
+ const struct vbt_header *head =
+ (const struct vbt_header *)fo->data;
+
+ if (memcmp(head->signature, "$VBT", 4) != 0) {
+ printerr("invalid VBT signature\n");
+ return;
+ }
+
+ if (!head->vbt_size || head->vbt_size > fo->size) {
+ printerr("invalid VBT size\n");
+ return;
+ }
+
+ if (!head->bdb_offset ||
+ head->bdb_offset > fo->size - sizeof(struct bdb_header)) {
+ printerr("invalid BDB offset\n");
+ return;
+ }
+
+ if (!head->header_size || head->header_size > fo->size) {
+ printerr("invalid header size\n");
+ return;
+ }
+
+ const struct bdb_header *const bdb_head =
+ (const struct bdb_header *)((const u8 *)head + head->bdb_offset);
+ if (memcmp(bdb_head->signature, "BIOS_DATA_BLOCK ", 16) != 0) {
+ printerr("invalid BDB signature\n");
+ return;
+ }
+
+ if (!bdb_head->header_size || bdb_head->header_size > fo->size) {
+ printerr("invalid BDB header size\n");
+ return;
+ }
+
+ /* Duplicate fo as caller is owner and remalloc frees the object */
+ *vbt = remalloc_fo(malloc_fo_sub(fo, 0), head->vbt_size);
+}
+/* Option ROM checksum */
+static u8 checksum_vbios(const optionrom_header_t *oh)
+{
+ const u8 *ptr = (const u8 *)oh;
+ size_t i;
+
+ u8 cksum = 0;
+ for (i = 0; i < ((MIN(oh->size, 128)) * 512); i++)
+ cksum += ptr[i];
+
+ return cksum;
}
-static void parse_vbios(const void *ptr)
+/* Verify Option ROM contents */
+static int is_valid_vbios(const struct fileobject *fo)
{
- const optionrom_header_t *oh;
- oh = ptr;
+ if (fo->size > 64 * 2 * KiB) {
+ printerr("VBIOS is to big\n");
+ return 0;
+ }
+
+ if (fo->size < sizeof(optionrom_header_t)) {
+ printerr("VBIOS is to small\n");
+ return 0;
+ }
+
+ const optionrom_header_t *oh = (const optionrom_header_t *)fo->data;
+
if (oh->signature != 0xaa55) {
- fprintf(stderr, "bad oprom signature: %x\n",
- oh->signature);
- return;
+ printerr("bad oprom signature: 0x%x\n", oh->signature);
+ return 0;
+ }
+
+ if (oh->size == 0 || oh->size > 0x80 || oh->size * 512 > fo->size) {
+ printerr("bad oprom size: 0x%x\n", oh->size);
+ return 0;
+ }
+
+ const u8 cksum = checksum_vbios(oh);
+ if (cksum) {
+ if (!ignore_checksum) {
+ printerr("bad oprom checksum: 0x%x\n", cksum);
+ return 0;
+ }
+ printwarn("bad oprom checksum: 0x%x\n", cksum);
+ }
+
+ if (oh->pcir_offset + sizeof(optionrom_pcir_t) > fo->size) {
+ printerr("bad pcir offset: 0x%x\n", oh->pcir_offset);
+ return 0;
+ }
+
+ if (oh->pcir_offset) {
+ const optionrom_pcir_t *pcir;
+ pcir = (const optionrom_pcir_t *)
+ ((const u8 *)oh + oh->pcir_offset);
+
+ if (pcir->signature != 0x52494350) {
+ printerr("Invalid PCIR signature\n");
+ return 0;
+ }
+
+ if (pcir->vendor != 0x8086) {
+ printerr("Not an Intel VBIOS\n");
+ return 0;
+ }
+
+ if (pcir->classcode[0] != 0 || pcir->classcode[1] != 0 ||
+ pcir->classcode[2] != 3) {
+ printerr("Not a VGA Option Rom\n");
+ return 0;
+ }
+ } else {
+ printwarn("no PCIR header found\n");
}
+
+ return 1;
+}
+
+/*
+ * Parse Option ROM and return a valid VBT fileobject.
+ * Caller has to make sure that it is a valid VBIOS.
+ * Return a NULL fileobject on error.
+ */
+static void parse_vbios(const struct fileobject *fo,
+ struct fileobject **vbt)
+{
+ const optionrom_header_t *oh = (const optionrom_header_t *)fo->data;
+ const struct vbt_header *head;
+ size_t i;
+
+ *vbt = NULL;
+
if (!oh->vbt_offset) {
- fprintf(stderr, "no VBT found\n");
+ printerr("no VBT found\n");
+ return;
+ }
+
+ if (oh->vbt_offset > (fo->size - sizeof(struct vbt_header))) {
+ printerr("invalid VBT offset\n");
return;
}
- parse_vbt((const char *) ptr + oh->vbt_offset);
+
+ head = (const struct vbt_header *)fo->data;
+ if (memcmp(head->signature, "$VBT", 4) == 0) {
+ parse_vbt(fo, vbt);
+ if (*vbt)
+ return;
+ }
+
+ printwarn("VBT wasn't found at specified offset\n");
+
+ for (i = sizeof(optionrom_header_t);
+ i <= fo->size - sizeof(struct vbt_header); i++) {
+ struct fileobject *fo_vbt = malloc_fo_sub(fo, i);
+ if (!fo_vbt)
+ continue;
+
+ head = (const struct vbt_header *)fo_vbt->data;
+ if (memcmp(head->signature, "$VBT", 4) == 0)
+ parse_vbt(fo_vbt, vbt);
+
+ free_fo(fo_vbt);
+
+ if (*vbt)
+ return;
+ }
+}
+
+/* Short VBT summary in human readable form */
+static void print_vbt(const struct fileobject *fo)
+{
+ const struct bdb_header *bdb;
+
+ if (fo->size < sizeof(struct vbt_header))
+ return;
+
+ const struct vbt_header *head = (const struct vbt_header *)fo->data;
+
+ print("Found VBT:\n");
+ printt("signature: <%20.20s>\n", head->signature);
+ printt("version: %d.%02d\n", head->version / 100, head->version % 100);
+ if (head->header_size != sizeof(struct vbt_header))
+ printt("header size: 0x%x\n", head->header_size);
+ printt("VBT size: 0x%x\n", head->vbt_size);
+ printt("VBT checksum: 0x%x\n", head->vbt_checksum);
+
+ if (head->bdb_offset > (fo->size - sizeof(struct bdb_header))) {
+ printerr("invalid BDB offset\n");
+ return;
+ }
+ bdb = (const struct bdb_header *)
+ ((const char *)head + head->bdb_offset);
+
+ if (memcmp("BIOS_DATA_BLOCK ", bdb->signature, 16) != 0) {
+ printerr("invalid BDB signature:%s\n", bdb->signature);
+ return;
+ }
+ printt("BDB version: %u.%02u\n", bdb->version / 100,
+ bdb->version % 100);
+}
+
+static void print_usage(const char *argv0, struct option *long_options)
+{
+ size_t i = 0;
+ printf("\nUsage:\n");
+ printf("%s --<SOURCECMD> [filename] --<DESTCMD> [filename]\n\n", argv0);
+ printf("SOURCECMD set the VBT source. Supported:\n");
+ printf(" %-10s: Legacy BIOS area at phys. memory 0xc0000\n",
+ "inlegacy");
+ printf(" %-10s: Read raw Intel VBT file\n", "invbt");
+ printf(" %-10s: Read VBT from Intel Option ROM file\n\n", "inoprom");
+ printf("DESTCMD set the VBT destination. Supported:\n");
+ printf(" %-10s: Print VBT in human readable form\n", "outdump");
+ printf(" %-10s: Write raw Intel VBT file\n", "outvbt");
+ printf(" %-10s: Patch existing Intel Option ROM\n\n", "patchoprom");
+
+ printf("Supported arguments:\n");
+ while (long_options[i].name) {
+ printf("\t-%c --%s %s\n", long_options[i].val,
+ long_options[i].name, long_options[i].has_arg ?
+ "<path>" : "");
+ i++;
+ };
+}
+
+/* Open a VBIOS file, calculate the checksum and fix it */
+static int fix_vbios_checksum(const char *filename)
+{
+ struct fileobject *fo = read_file(filename);
+ if (!fo) {
+ printerr("%s open failed\n", filename);
+ return 1;
+ }
+
+ if (fo->size < sizeof(optionrom_header_t))
+ return 1;
+
+ optionrom_header_t *oh = (optionrom_header_t *)fo->data;
+
+ if (oh->size * 512 > fo->size)
+ return 1;
+
+ /* fix checksum */
+ oh->checksum = -(checksum_vbios(oh) - oh->checksum);
+
+ if (write_file(filename, fo)) {
+ printerr("%s write failed\n", filename);
+ free_fo(fo);
+ return 1;
+ }
+ free_fo(fo);
+
+ return 0;
+}
+
+/* Return the VBT structure size in bytes */
+static size_t vbt_size(const struct fileobject *fo)
+{
+ if (!fo || fo->size < sizeof(struct vbt_header))
+ return 0;
+ const struct vbt_header *head = (const struct vbt_header *)fo->data;
+
+ return head->vbt_size;
+}
+
+/*
+ * Patch an Intel Option ROM with new VBT.
+ * Caller has to make sure that VBIOS and VBT are valid.
+ * Return 1 on error.
+ */
+static int patch_vbios(struct fileobject *fo,
+ const struct fileobject *fo_vbt)
+{
+ optionrom_header_t *oh = (optionrom_header_t *)fo->data;
+ struct vbt_header *head;
+
+ struct fileobject *old_vbt = NULL;
+ parse_vbios(fo, &old_vbt);
+
+ if (old_vbt) {
+ if (oh->vbt_offset + vbt_size(old_vbt) == fo->size) {
+ /* Located at the end of file - reduce file size */
+ if (fo->size < vbt_size(old_vbt))
+ return 1;
+ fo = remalloc_fo(fo, fo->size - vbt_size(old_vbt));
+ if (!fo) {
+ printerr("Failed to allocate memory\n");
+ return 1;
+ }
+ oh->vbt_offset = 0;
+ } else if (vbt_size(old_vbt) < vbt_size(fo_vbt)) {
+ /* In the middle of the file - Remove old VBT */
+ memset(fo->data + oh->vbt_offset, 0xff,
+ vbt_size(old_vbt));
+ oh->vbt_offset = 0;
+ } else {
+ /* New VBT overwrites existing one - Clear memory */
+ memset(fo->data + oh->vbt_offset, 0xff,
+ vbt_size(old_vbt));
+ }
+
+ free_fo(old_vbt);
+ }
+
+ if (!oh->vbt_offset) {
+ print("increasing VBIOS to append VBT\n");
+ if ((fo->size + vbt_size(fo_vbt)) >= 64 * KiB) {
+ printerr("VBT won't fit\n");
+ return 1;
+ }
+
+ oh->vbt_offset = fo->size;
+ fo = remalloc_fo(fo, fo->size + vbt_size(fo_vbt));
+ if (!fo) {
+ printerr("Failed to allocate memory\n");
+ return 1;
+ }
+ oh->size = (fo->size + 512 - 1) / 512;
+ }
+
+ head = (struct vbt_header *)((u8 *)oh + oh->vbt_offset);
+ memcpy(head, fo_vbt->data, vbt_size(fo_vbt));
+
+ return 0;
}
int main(int argc, char **argv)
{
- const void *ptr;
- int fd;
- off_t offset;
- if (argc == 2) {
- fd = open(argv[1], O_RDONLY);
- offset = 0;
- } else {
- fd = open("/dev/mem", O_RDONLY);
- offset = 0xc0000;
+ int opt, option_index = 0;
+
+ size_t has_input = 0, has_output = 0;
+ size_t dump = 0, in_legacy = 0;
+ char *in_vbt = NULL, *in_oprom = NULL;
+ char *out_vbt = NULL, *patch_oprom = NULL;
+ static struct option long_options[] = {
+ {"help", 0, 0, 'h'},
+ {"outdump", 0, 0, 'd'},
+ {"inlegacy", 0, 0, 'l'},
+ {"invbt", required_argument, 0, 'f'},
+ {"inoprom", required_argument, 0, 'o'},
+ {"outvbt", required_argument, 0, 'v'},
+ {"patchoprom", required_argument, 0, 'p'},
+ {0, 0, 0, 0}
+ };
+
+ while ((opt = getopt_long(argc, argv, "hdlf:o:v:p:i",
+ long_options, &option_index)) != EOF) {
+ switch (opt) {
+ case 'd':
+ dump = 1;
+ has_output = 1;
+ break;
+ case 'l':
+ in_legacy = 1;
+ has_input = 1;
+ break;
+ case 'f':
+ in_vbt = strdup(optarg);
+ has_input = 1;
+ break;
+ case 'o':
+ in_oprom = strdup(optarg);
+ has_input = 1;
+ break;
+ case 'v':
+ out_vbt = strdup(optarg);
+ has_output = 1;
+ break;
+ case 'p':
+ patch_oprom = strdup(optarg);
+ has_output = 1;
+ break;
+ case '?':
+ case 'h':
+ print_usage(argv[0], long_options);
+ exit(0);
+ break;
+ }
}
- if (fd < 0) {
- fprintf(stderr, "open failed: %s\n", strerror(errno));
+
+ if (!has_input)
+ printerr("No input specified !\n");
+ if (!has_output)
+ printerr("No output specified !\n");
+ if (argc < 2 || argc > 6 || !has_input || !has_output) {
+ print_usage(argv[0], long_options);
return 1;
}
- ptr = mmap(0, 65536, PROT_READ, MAP_SHARED, fd, offset);
- if (ptr == MAP_FAILED) {
- fprintf(stderr, "mmap failed: %s\n", strerror(errno));
+ struct fileobject *fo;
+
+ if (in_legacy)
+ fo = read_physmem(0xc0000);
+ else if (in_vbt)
+ fo = read_file(in_vbt);
+ else
+ fo = read_file(in_oprom);
+
+ if (!fo) {
+ printerr("Failed to read input file\n");
return 1;
}
- parse_vbios(ptr);
- close(fd);
+
+ struct fileobject *vbt = NULL;
+ if (in_legacy || in_oprom) {
+ if (!is_valid_vbios(fo)) {
+ printerr("Invalid input file\n");
+
+ free_fo(fo);
+ return 1;
+ }
+ parse_vbios(fo, &vbt);
+ } else
+ parse_vbt(fo, &vbt);
+
+ free_fo(fo);
+
+ if (!vbt) {
+ printerr("Failed to find VBT.\n");
+ return 1;
+ }
+
+ if (!dump)
+ print_vbt(vbt);
+
+ if (dump) {
+ dump_vbt(vbt);
+ } else if (out_vbt) {
+ if (write_file(out_vbt, vbt))
+ printerr("Failed to write VBT\n");
+ else
+ print("VBT written to %s\n", out_vbt);
+ } else if (patch_oprom) {
+ fo = read_file(patch_oprom);
+ if (!fo) {
+ printerr("Failed to read input file\n");
+ return 1;
+ }
+ if (!is_valid_vbios(fo)) {
+ printerr("Invalid input file\n");
+ free_fo(fo);
+ return 1;
+ }
+ if (patch_vbios(fo, vbt)) {
+ printerr("Failed to patch VBIOS\n");
+ free_fo(fo);
+ return 1;
+ }
+ if (write_file(patch_oprom, fo)) {
+ printerr("Failed to write VBIOS\n");
+ free_fo(fo);
+ return 1;
+ }
+ free_fo(fo);
+ if (fix_vbios_checksum(patch_oprom)) {
+ printerr("Failed to fix checksum\n");
+ return 1;
+ }
+ print("VBIOS %s successfully patched\n", patch_oprom);
+ }
+
+ /* cleanup */
+ if (patch_oprom)
+ free(patch_oprom);
+ if (out_vbt)
+ free(out_vbt);
+ if (in_vbt)
+ free(in_vbt);
+ if (in_oprom)
+ free(in_oprom);
+
+ free_fo(vbt);
+
return 0;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-27 12:24:21 +0000