On 08/06/2018 05:13 PM, Andy Shevchenko wrote:
On Sun, Jul 29, 2018 at 3:09 PM, Heinrich Schuchardt xypron.glpk@gmx.de wrote:
On 07/29/2018 02:40 AM, Bin Meng wrote:
Ubuntu Cosmic has gcc 8.2. Setting up a virtual machine with virt-manager is quite easy.
Can you check if output of `gcc -v` has --enable-default-pie?
The flag is enabled both for gcc-7 and gcc-8 in Debian Buster.
If so (I bet it is the case), can you try the following patch (sorry, it's mangled, needs manual apply)
--- a/Makefile +++ b/Makefile @@ -371,6 +371,7 @@ KBUILD_CPPFLAGS := -D__KERNEL__ -D__UBOOT__
KBUILD_CFLAGS := -Wall -Wstrict-prototypes \ -Wno-format-security \
-fno-pie \ -fno-builtin -ffreestanding $(CSTD_FLAG)KBUILD_CFLAGS += -fshort-wchar KBUILD_AFLAGS := -D__ASSEMBLY__
P.S. I have no time right now to test this myself though.
With the flag building with gcc-8.1 works. But the interesting question is whether the EFI subsystem will be able to relocate the runtime code when the EFI sercice SetVirtualAddressMap is called.
Best regards
Heinrich