Richard W.M. Jones writes:
> As the name suggests this lets you load a ROM/disk image that is
> gzipped. It is uncompressed before storing it in guest memory.
>
<snip>
> +
> + /* Is it a gzip-compressed file? */
> + if (len < 2 ||
> + compressed_data[0] != '\x1f' ||
> + compressed_data[1] != '\x8b') {
> + goto out;
> + }
I was looking to see if the zlib library provided the magic numbers or a
verification routine here but I couldn't find it.
> +
> + if (max_sz > LOAD_IMAGE_MAX_GUNZIP_BYTES) {
> + max_sz = LOAD_IMAGE_MAX_GUNZIP_BYTES;
> + }
> +
> + data = g_malloc(max_sz);
> + bytes = gunzip(data, max_sz, compressed_data, len);
> + if (bytes < 0) {
> + fprintf(stderr, "%s: unable to decompress gzipped kernel file\n",
> + filename);
> + goto out;
> + }
> +
> + rom_add_blob_fixed(filename, data, bytes, addr);
> + ret = bytes;
> +
> + out:
> + g_free(compressed_data);
> + g_free(data);
> + return ret;
> +}
> +
> /*
> * Functions for reboot-persistent memory regions.
> * - used for vga bios and option roms.
> diff --git a/include/hw/loader.h b/include/hw/loader.h
> index 796cbf9..00c9117 100644
> --- a/include/hw/loader.h
> +++ b/include/hw/loader.h
> @@ -15,6 +15,7 @@ int get_image_size(const char *filename);
> int load_image(const char *filename, uint8_t *addr); /* deprecated */
> int load_image_targphys(const char *filename, hwaddr,
> uint64_t max_sz);
> +int load_image_gzipped(const char *filename, hwaddr addr, uint64_t max_sz);
>
> #define ELF_LOAD_FAILED -1
> #define ELF_LOAD_NOT_ELF -2
Reviewed-by: Alex Bennée <alex.ben...@linaro.org>
--
Alex Bennée
