libxc: Add unsafe decompressors

Add decompressors based on hypervisor code.  This are used in mini-os by
pv-grub.

This enables pv-grub to boot kernels compressed with e.g. xz, which are
becoming more common.

Signed-off-by: Bastian Blank <waldi@debian.org>

Adjusted to use terminology "unsafe" rather than "trusted" to indicate
that the user had better sanitise the data (or not care, as in stub
domains) as suggested by Tim Deegan. This was effectively a sed script.

Minimise the changes to hypervisor code by moving the "compat layer" into the
relevant libxc source files (which include the Xen ones).

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Samuel Thibault <samuel.thibault@ens-lyon.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/tools/libxc/xc_dom_bzimageloader.c b/tools/libxc/xc_dom_bzimageloader.c
index 6daa78ce2a..3870c6d5f5 100644
--- a/tools/libxc/xc_dom_bzimageloader.c
+++ b/tools/libxc/xc_dom_bzimageloader.c
@@ -35,6 +35,8 @@
 #include "xg_private.h"
 #include "xc_dom.h"
 
+#ifndef __MINIOS__
+
 #if defined(HAVE_BZLIB)
 
 #include <bzlib.h>
@@ -562,6 +564,15 @@ static int xc_try_lzo1x_decode(
 
 #endif
 
+#else /* __MINIOS__ */
+
+int xc_try_bzip2_decode(struct xc_dom_image *dom, void **blob, size_t *size);
+int xc_try_lzma_decode(struct xc_dom_image *dom, void **blob, size_t *size);
+int xc_try_lzo1x_decode(struct xc_dom_image *dom, void **blob, size_t *size);
+int xc_try_xz_decode(struct xc_dom_image *dom, void **blob, size_t *size);
+
+#endif /* !__MINIOS__ */
+
 struct setup_header {
     uint8_t  _pad0[0x1f1];  /* skip uninteresting stuff */
     uint8_t  setup_sects;