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-rw-r--r--bootloader.cpp238
1 files changed, 221 insertions, 17 deletions
diff --git a/bootloader.cpp b/bootloader.cpp
index 600d238f5..fbb31e060 100644
--- a/bootloader.cpp
+++ b/bootloader.cpp
@@ -14,10 +14,14 @@
* limitations under the License.
*/
+/*
#include <fs_mgr.h>
+*/
#include "bootloader.h"
#include "common.h"
+extern "C" {
#include "mtdutils/mtdutils.h"
+}
#include "roots.h"
#include <errno.h>
@@ -26,38 +30,42 @@
#include <sys/stat.h>
#include <unistd.h>
+static char device_type = 'e'; // e for emmc or m for mtd, default is emmc
+static char device_name[256];
+
+/*
static int get_bootloader_message_mtd(struct bootloader_message *out, const Volume* v);
static int set_bootloader_message_mtd(const struct bootloader_message *in, const Volume* v);
static int get_bootloader_message_block(struct bootloader_message *out, const Volume* v);
static int set_bootloader_message_block(const struct bootloader_message *in, const Volume* v);
-
+*/
int get_bootloader_message(struct bootloader_message *out) {
- Volume* v = volume_for_path("/misc");
- if (v == NULL) {
+ //volume_for_path("/misc");
+ if (device_name[0] == 0) {
LOGE("Cannot load volume /misc!\n");
return -1;
}
- if (strcmp(v->fs_type, "mtd") == 0) {
- return get_bootloader_message_mtd(out, v);
- } else if (strcmp(v->fs_type, "emmc") == 0) {
- return get_bootloader_message_block(out, v);
+ if (device_type == 'm') {
+ return get_bootloader_message_mtd_name(out);
+ } else if (device_type == 'e') {
+ return get_bootloader_message_block_name(out);
}
- LOGE("unknown misc partition fs_type \"%s\"\n", v->fs_type);
+ LOGE("unknown misc partition fs_type \"%c\"\n", device_type);
return -1;
}
int set_bootloader_message(const struct bootloader_message *in) {
- Volume* v = volume_for_path("/misc");
- if (v == NULL) {
+ //volume_for_path("/misc");
+ if (device_name[0] == 0) {
LOGE("Cannot load volume /misc!\n");
return -1;
}
- if (strcmp(v->fs_type, "mtd") == 0) {
- return set_bootloader_message_mtd(in, v);
- } else if (strcmp(v->fs_type, "emmc") == 0) {
- return set_bootloader_message_block(in, v);
+ if (device_type == 'm') {
+ return set_bootloader_message_mtd_name(in, device_name);
+ } else if (device_type == 'e') {
+ return set_bootloader_message_block_name(in, device_name);
}
- LOGE("unknown misc partition fs_type \"%s\"\n", v->fs_type);
+ LOGE("unknown misc partition type \"%c\"\n", device_type);
return -1;
}
@@ -67,7 +75,7 @@ int set_bootloader_message(const struct bootloader_message *in) {
static const int MISC_PAGES = 3; // number of pages to save
static const int MISC_COMMAND_PAGE = 1; // bootloader command is this page
-
+/*
static int get_bootloader_message_mtd(struct bootloader_message *out,
const Volume* v) {
size_t write_size;
@@ -137,7 +145,89 @@ static int set_bootloader_message_mtd(const struct bootloader_message *in,
LOGI("Set boot command \"%s\"\n", in->command[0] != 255 ? in->command : "");
return 0;
}
+*/
+
+void set_device_type(char new_type) {
+ device_type = new_type;
+}
+
+void set_device_name(const char* new_name) {
+ if (strlen(new_name) >= sizeof(device_name)) {
+ LOGE("New device name of '%s' is too large for bootloader.cpp\n", new_name);
+ } else {
+ strcpy(device_name, new_name);
+ }
+}
+
+int get_bootloader_message_mtd_name(struct bootloader_message *out) {
+ size_t write_size;
+ mtd_scan_partitions();
+ const MtdPartition *part = mtd_find_partition_by_name(device_name);
+ if (part == NULL || mtd_partition_info(part, NULL, NULL, &write_size)) {
+ LOGE("Can't find %s\n", device_name);
+ return -1;
+ }
+
+ MtdReadContext *read = mtd_read_partition(part);
+ if (read == NULL) {
+ LOGE("Can't open %s\n(%s)\n", device_name, strerror(errno));
+ return -1;
+ }
+
+ const ssize_t size = write_size * MISC_PAGES;
+ char data[size];
+ ssize_t r = mtd_read_data(read, data, size);
+ if (r != size) LOGE("Can't read %s\n(%s)\n", device_name, strerror(errno));
+ mtd_read_close(read);
+ if (r != size) return -1;
+
+ memcpy(out, &data[write_size * MISC_COMMAND_PAGE], sizeof(*out));
+ return 0;
+}
+
+int set_bootloader_message_mtd_name(const struct bootloader_message *in,
+ const char* mtd_name) {
+ size_t write_size;
+ mtd_scan_partitions();
+ const MtdPartition *part = mtd_find_partition_by_name(mtd_name);
+ if (part == NULL || mtd_partition_info(part, NULL, NULL, &write_size)) {
+ printf("Can't find %s\n", mtd_name);
+ return -1;
+ }
+
+ MtdReadContext *read = mtd_read_partition(part);
+ if (read == NULL) {
+ printf("Can't open %s\n(%s)\n", mtd_name, strerror(errno));
+ return -1;
+ }
+
+ ssize_t size = write_size * MISC_PAGES;
+ char data[size];
+ ssize_t r = mtd_read_data(read, data, size);
+ if (r != size) printf("Can't read %s\n(%s)\n", mtd_name, strerror(errno));
+ mtd_read_close(read);
+ if (r != size) return -1;
+
+ memcpy(&data[write_size * MISC_COMMAND_PAGE], in, sizeof(*in));
+
+ MtdWriteContext *write = mtd_write_partition(part);
+ if (write == NULL) {
+ printf("Can't open %s\n(%s)\n", mtd_name, strerror(errno));
+ return -1;
+ }
+ if (mtd_write_data(write, data, size) != size) {
+ printf("Can't write %s\n(%s)\n", mtd_name, strerror(errno));
+ mtd_write_close(write);
+ return -1;
+ }
+ if (mtd_write_close(write)) {
+ printf("Can't finish %s\n(%s)\n", mtd_name, strerror(errno));
+ return -1;
+ }
+ printf("Set boot command \"%s\"\n", in->command[0] != 255 ? in->command : "");
+ return 0;
+}
// ------------------------------------
// for misc partitions on block devices
@@ -159,7 +249,7 @@ static void wait_for_device(const char* fn) {
printf("failed to stat %s\n", fn);
}
}
-
+/*
static int get_bootloader_message_block(struct bootloader_message *out,
const Volume* v) {
wait_for_device(v->blk_device);
@@ -201,3 +291,117 @@ static int set_bootloader_message_block(const struct bootloader_message *in,
}
return 0;
}
+*/
+
+int get_bootloader_message_block_name(struct bootloader_message *out) {
+ wait_for_device(device_name);
+ FILE* f = fopen(device_name, "rb");
+ if (f == NULL) {
+ LOGE("Can't open %s\n(%s)\n", device_name, strerror(errno));
+ return -1;
+ }
+ struct bootloader_message temp;
+ int count = fread(&temp, sizeof(temp), 1, f);
+ if (count != 1) {
+ LOGE("Failed reading %s\n(%s)\n", device_name, strerror(errno));
+ return -1;
+ }
+ if (fclose(f) != 0) {
+ LOGE("Failed closing %s\n(%s)\n", device_name, strerror(errno));
+ return -1;
+ }
+ memcpy(out, &temp, sizeof(temp));
+ return 0;
+}
+
+int set_bootloader_message_block_name(const struct bootloader_message *in,
+ const char* block_name) {
+ wait_for_device(block_name);
+ FILE* f = fopen(block_name, "wb");
+ if (f == NULL) {
+ printf("Can't open %s\n(%s)\n", block_name, strerror(errno));
+ return -1;
+ }
+ int count = fwrite(in, sizeof(*in), 1, f);
+ if (count != 1) {
+ printf("Failed writing %s\n(%s)\n", block_name, strerror(errno));
+ return -1;
+ }
+ if (fclose(f) != 0) {
+ printf("Failed closing %s\n(%s)\n", block_name, strerror(errno));
+ return -1;
+ }
+ return 0;
+}
+
+static const char *COMMAND_FILE = "/cache/recovery/command";
+static const int MAX_ARG_LENGTH = 4096;
+static const int MAX_ARGS = 100;
+
+// command line args come from, in decreasing precedence:
+// - the actual command line
+// - the bootloader control block (one per line, after "recovery")
+// - the contents of COMMAND_FILE (one per line)
+void
+get_args(int *argc, char ***argv) {
+ struct bootloader_message boot;
+ memset(&boot, 0, sizeof(boot));
+ get_bootloader_message(&boot); // this may fail, leaving a zeroed structure
+
+ if (boot.command[0] != 0 && boot.command[0] != 255) {
+ LOGI("Boot command: %.*s\n", sizeof(boot.command), boot.command);
+ }
+
+ if (boot.status[0] != 0 && boot.status[0] != 255) {
+ LOGI("Boot status: %.*s\n", sizeof(boot.status), boot.status);
+ }
+
+ // --- if arguments weren't supplied, look in the bootloader control block
+ if (*argc <= 1) {
+ boot.recovery[sizeof(boot.recovery) - 1] = '\0'; // Ensure termination
+ const char *arg = strtok(boot.recovery, "\n");
+ if (arg != NULL && !strcmp(arg, "recovery")) {
+ *argv = (char **) malloc(sizeof(char *) * MAX_ARGS);
+ (*argv)[0] = strdup(arg);
+ for (*argc = 1; *argc < MAX_ARGS; ++*argc) {
+ if ((arg = strtok(NULL, "\n")) == NULL) break;
+ (*argv)[*argc] = strdup(arg);
+ }
+ LOGI("Got arguments from boot message\n");
+ } else if (boot.recovery[0] != 0 && boot.recovery[0] != 255) {
+ LOGE("Bad boot message\n\"%.20s\"\n", boot.recovery);
+ }
+ }
+
+ // --- if that doesn't work, try the command file
+ if (*argc <= 1) {
+ FILE *fp = fopen(COMMAND_FILE, "r");
+ if (fp != NULL) {
+ char *argv0 = (*argv)[0];
+ *argv = (char **) malloc(sizeof(char *) * MAX_ARGS);
+ (*argv)[0] = argv0; // use the same program name
+
+ char buf[MAX_ARG_LENGTH];
+ for (*argc = 1; *argc < MAX_ARGS; ++*argc) {
+ if (!fgets(buf, sizeof(buf), fp)) break;
+ (*argv)[*argc] = strdup(strtok(buf, "\r\n")); // Strip newline.
+ }
+
+ fflush(fp);
+ if (ferror(fp)) LOGE("Error in %s\n(%s)\n", COMMAND_FILE, strerror(errno));
+ fclose(fp);
+ LOGI("Got arguments from %s\n", COMMAND_FILE);
+ }
+ }
+
+ // --> write the arguments we have back into the bootloader control block
+ // always boot into recovery after this (until finish_recovery() is called)
+ strlcpy(boot.command, "boot-recovery", sizeof(boot.command));
+ strlcpy(boot.recovery, "recovery\n", sizeof(boot.recovery));
+ int i;
+ for (i = 1; i < *argc; ++i) {
+ strlcat(boot.recovery, (*argv)[i], sizeof(boot.recovery));
+ strlcat(boot.recovery, "\n", sizeof(boot.recovery));
+ }
+ set_bootloader_message(&boot);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-06 23:00:35 +0200