Re: [Minios-devel] [UNIKRAFT PATCHv6 32/37] plat/kvm: Update linker.uk to link image for Arm64

["Wei Chen (Arm Technology China)" <Wei.Chen@xxxxxxx>]

Hi Simon,

> -----Original Message-----
> From: Simon Kuenzer <simon.kuenzer@xxxxxxxxx>
> Sent: 2018年9月15日 3:36
> To: Wei Chen (Arm Technology China) <Wei.Chen@xxxxxxx>; minios-
> devel@xxxxxxxxxxxxxxxxxxxx
> Cc: Kaly Xin (Arm Technology China) <Kaly.Xin@xxxxxxx>; nd <nd@xxxxxxx>
> Subject: Re: [Minios-devel] [UNIKRAFT PATCHv6 32/37] plat/kvm: Update
> linker.uk to link image for Arm64
> 
> Hey Wei,
> 
> I noticed that on some installations it fails to link the image with:
> 
> /usr/lib/gcc-cross/aarch64-linux-gnu/5/../../../../aarch64-linux-gnu/bin/ld:
> cannot open linker script file ldscripts/aarch64elf.xr: No such file or
> directory
> collect2: error: ld returned 1 exit status
> 
> I think there might be something missing in the aarch64 cross compiler
> packages of Debian/Ubuntu. I could link and run the image by changing
> the LDFLAGS to -Wl,-m,aarch64linux.
> 
> Do you know something about this. Is this related?:
> https://lkml.org/lkml/2018/7/10/190
> 


Here seems something interesting about above kernel patch:
https://www.labbott.name/blog/2018/07/10/the-cabbage-patch-for-linker-scripts/

Maybe we'd better to use aarch64linux for Arm64 by default?

> Thanks,
> 
> Simon
> 
> On 14.09.2018 21:27, Simon Kuenzer wrote:
> > Reviewed-by: Simon Kuenzer <simon.kuenzer@xxxxxxxxx>
> >
> > On 14.09.2018 09:57, Wei Chen wrote:
> >> From: Wei Chen <Wei.Chen@xxxxxxx>
> >>
> >> Update linker.uk to support link Arm64 image to aarch64elf
> >> format.
> >>
> >> Signed-off-by: Wei Chen <Wei.Chen@xxxxxxx>
> >> ---
> >>   plat/kvm/Linker.uk | 7 ++++++-
> >>   1 file changed, 6 insertions(+), 1 deletion(-)
> >>
> >> diff --git a/plat/kvm/Linker.uk b/plat/kvm/Linker.uk
> >> index 20fe1d2..daf2efe 100644
> >> --- a/plat/kvm/Linker.uk
> >> +++ b/plat/kvm/Linker.uk
> >> @@ -1,6 +1,11 @@
> >>   ifeq (x86_64,$(CONFIG_UK_ARCH))
> >>   KVM_LDSCRIPT  := $(CONFIG_UK_BASE)/plat/kvm/x86/link64.lds
> >>   KVM_LDFLAGS-y += -Wl,-m,elf_x86_64
> >> +else ifeq (arm64,$(CONFIG_UK_ARCH))
> >> +KVM_LDSCRIPT_SRC := $(CONFIG_UK_BASE)/plat/kvm/arm/link64.lds.S
> >> +KVM_LDSCRIPT     := $(call src2lds,libkvmplat,$(KVM_LDSCRIPT_SRC))
> >> +KVM_LDFLAGS-y     += -Wl,-m,aarch64elf
> >> +$(eval $(call buildrule,libkvmplat,$(KVM_LDSCRIPT_SRC),$(KVM_LDSCRIPT)))
> >>   endif
> >>   ##
> >> @@ -16,7 +21,7 @@ $(KVM_IMAGE): $(KVM_LINK) $(KVM_LINK-y) $(UK_LINK)
> >> $(UK_LINK-y) $(KVM_LDSCRIPT)
> >>               $(UK_LINK) $(UK_LINK-y) -o $@.ld.o)
> >>       $(call build_cmd,OBJCOPY,,$@.o,\
> >>              $(OBJCOPY) -w -G kvmos_* -G _libkvmplat_entry $@.ld.o $@.o)
> >> -ifeq (x86_64,$(CONFIG_UK_ARCH))
> >> +ifneq ($(filter x86_64 arm64,$(CONFIG_UK_ARCH)),)
> >>       $(call build_cmd,LD,,$@,\
> >>              $(LD) $(LDFLAGS) $(LDFLAGS-y) \
> >>                $(KVM_LDFLAGS) $(KVM_LDFLAGS-y) \
> >>
> >
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> > Minios-devel@xxxxxxxxxxxxxxxxxxxx
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