/* Handle Q_CODEC_DO_CALLBACK */ static void do_callback(void (* callback)(void)) { codec_queue_ack(Q_CODEC_DO_CALLBACK); if (callback) { cpucache_commit_discard(); callback(); cpucache_commit(); } }
/* load binary blob from disk to memory, returning a handle */ void * lc_open(const char *filename, unsigned char *buf, size_t buf_size) { int fd = open(filename, O_RDONLY); ssize_t read_size; struct lc_header hdr; unsigned char *buf_end = buf+buf_size; off_t copy_size; if (fd < 0) { DEBUGF("Could not open file"); goto error; } #if NUM_CORES > 1 /* Make sure COP cache is flushed and invalidated before loading */ { int my_core = switch_core(CURRENT_CORE ^ 1); cpucache_commit_discard(); switch_core(my_core); } #endif /* read the header to obtain the load address */ read_size = read(fd, &hdr, sizeof(hdr)); if (read_size < 0) { DEBUGF("Could not read from file"); goto error_fd; } /* hdr.end_addr points to the end of the bss section, * but there might be idata/icode behind that so the bytes to copy * can be larger */ copy_size = MAX(filesize(fd), hdr.end_addr - hdr.load_addr); if (hdr.load_addr < buf || (hdr.load_addr+copy_size) > buf_end) { DEBUGF("Binary doesn't fit into memory"); goto error_fd; } /* go back to beginning to load the whole thing (incl. header) */ if (lseek(fd, 0, SEEK_SET) < 0) { DEBUGF("lseek failed"); goto error_fd; } /* the header has the addresses where the code is linked at */ read_size = read(fd, hdr.load_addr, copy_size); close(fd); if (read_size < 0) { DEBUGF("Could not read from file"); goto error; } /* commit dcache and discard icache */ cpucache_commit_discard(); /* return a pointer the header, reused by lc_get_header() */ return hdr.load_addr; error_fd: close(fd); error: return NULL; }