[Xen-devel] [PATCH 4/4] x86: check for multiboot{1, 2} header presence

[Roger Pau Monne <roger.pau@xxxxxxxxxx>]

After building the hypervisor binary. Note that the check is performed
by searching for the magic header value at the start of the binary.

Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
---
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Cc: Wei Liu <wl@xxxxxxx>
---
 xen/arch/x86/Makefile | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/xen/arch/x86/Makefile b/xen/arch/x86/Makefile
index 8a8d8f060f..9bb3bf6e6c 100644
--- a/xen/arch/x86/Makefile
+++ b/xen/arch/x86/Makefile
@@ -102,6 +102,9 @@ syms-warn-dup-$(CONFIG_SUPPRESS_DUPLICATE_SYMBOL_WARNINGS) 
:=
 $(TARGET): $(TARGET)-syms $(efi-y) boot/mkelf32
        ./boot/mkelf32 $(notes_phdrs) $(TARGET)-syms $(TARGET) 
$(XEN_IMG_OFFSET) \
                       `$(NM) $(TARGET)-syms | sed -ne 's/^\([^ ]*\) . 
__2M_rwdata_end$$/0x\1/p'`
+       # Check for multiboot{1,2} headers
+       od -t x4 -N 8192 $(TARGET) | grep 1badb002 > /dev/null
+       od -t x4 -N 32768 $(TARGET) | grep e85250d6 > /dev/null
 
 ALL_OBJS := $(BASEDIR)/arch/x86/boot/built_in.o 
$(BASEDIR)/arch/x86/efi/built_in.o $(ALL_OBJS)
 
-- 
2.20.1 (Apple Git-117)


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