diff options
Diffstat (limited to 'bootloader.cpp')
| -rw-r--r-- | bootloader.cpp | 130 |
1 files changed, 127 insertions, 3 deletions
diff --git a/bootloader.cpp b/bootloader.cpp index d80c5e793..13bc39167 100644 --- a/bootloader.cpp +++ b/bootloader.cpp @@ -14,6 +14,10 @@ * limitations under the License. */ +extern "C" { +#include "mtdutils/mtdutils.h" +} + #include <errno.h> #include <fcntl.h> #include <inttypes.h> @@ -22,26 +26,51 @@ #include <sys/stat.h> #include <sys/types.h> #include <unistd.h> - -#include <fs_mgr.h> +#include <stdlib.h> #include "bootloader.h" #include "common.h" #include "mtdutils/mtdutils.h" -#include "roots.h" +//#include "roots.h" #include "unique_fd.h" +// fake Volume struct that allows us to use the AOSP code easily +struct Volume +{ + char fs_type[8]; + char blk_device[256]; +}; + +static Volume misc; + +void set_misc_device(const char* type, const char* name) { + strlcpy(misc.fs_type, type, sizeof(misc.fs_type)); + if (strlen(name) >= sizeof(misc.blk_device)) { + LOGE("New device name of '%s' is too large for bootloader.cpp\n", name); + } else { + strcpy(misc.blk_device, name); + } +} + static int get_bootloader_message_mtd(bootloader_message* out, const Volume* v); static int set_bootloader_message_mtd(const bootloader_message* in, const Volume* v); static int get_bootloader_message_block(bootloader_message* out, const Volume* v); static int set_bootloader_message_block(const bootloader_message* in, const Volume* v); int get_bootloader_message(bootloader_message* out) { +#if 0 Volume* v = volume_for_path("/misc"); if (v == nullptr) { LOGE("Cannot load volume /misc!\n"); return -1; } +#else + Volume* v = &misc; + if (v->fs_type[0] == 0) { + LOGI("Not using /misc, not defined in fstab.\n"); + return -1; + } +#endif if (strcmp(v->fs_type, "mtd") == 0) { return get_bootloader_message_mtd(out, v); } else if (strcmp(v->fs_type, "emmc") == 0) { @@ -52,11 +81,19 @@ int get_bootloader_message(bootloader_message* out) { } int set_bootloader_message(const bootloader_message* in) { +#if 0 Volume* v = volume_for_path("/misc"); if (v == nullptr) { LOGE("Cannot load volume /misc!\n"); return -1; } +#else + Volume* v = &misc; + if (v->fs_type[0] == 0) { + LOGI("Not using /misc, not defined in fstab.\n"); + return -1; + } +#endif if (strcmp(v->fs_type, "mtd") == 0) { return set_bootloader_message_mtd(in, v); } else if (strcmp(v->fs_type, "emmc") == 0) { @@ -174,7 +211,11 @@ static int get_bootloader_message_block(bootloader_message* out, LOGE("failed to open \"%s\": %s\n", v->blk_device, strerror(errno)); return -1; } +#ifdef BOARD_RECOVERY_BLDRMSG_OFFSET + fseek(f, BOARD_RECOVERY_BLDRMSG_OFFSET, SEEK_SET); +#endif bootloader_message temp; + int count = fread(&temp, sizeof(temp), 1, f); if (count != 1) { LOGE("failed to read \"%s\": %s\n", v->blk_device, strerror(errno)); @@ -197,6 +238,10 @@ static int set_bootloader_message_block(const bootloader_message* in, return -1; } +#ifdef BOARD_RECOVERY_BLDRMSG_OFFSET + lseek(fd.get(), BOARD_RECOVERY_BLDRMSG_OFFSET, SEEK_SET); +#endif + size_t written = 0; const uint8_t* start = reinterpret_cast<const uint8_t*>(in); size_t total = sizeof(*in); @@ -216,3 +261,82 @@ static int set_bootloader_message_block(const bootloader_message* in, } 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", (int)sizeof(boot.command), boot.command); + } + + if (boot.status[0] != 0 && boot.status[0] != 255) { + LOGI("Boot status: %.*s\n", (int)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 *token; + 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; + token = strtok(buf, "\r\n"); + if (token != NULL) { + (*argv)[*argc] = strdup(token); // Strip newline. + } else { + --*argc; + } + } + + 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); +} |