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efi: Add support for a hello world test program

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It is useful to have a basic sanity check for EFI loader support. Add a
'bootefi hello' command which loads HelloWord.efi and runs it under U-Boot.

Signed-off-by: Simon Glass <sjg@chromium.org>
[agraf: Fix documentation, add unfulfilled kconfig dep]
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Simon Glass 2016-11-07 08:47:08 -07:00 • committed by Alexander Graf
parent bb1ae55948
commit c7ae3dfdcc
7 changed files with 107 additions and 6 deletions
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33
scripts/Makefile.lib
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@ -321,6 +321,39 @@ cmd_S_ttf= \
$(obj)/%.S: $(src)/%.ttf
$(call cmd,S_ttf)
# EFI Hello World application
# ---------------------------------------------------------------------------
# Generate an assembly file to wrap the EFI app
cmd_S_efi= \
( \
echo '.section .rodata.efi.init,"a"'; \
echo '.balign 16'; \
echo '.global __efi_hello_world_begin'; \
echo '__efi_hello_world_begin:'; \
echo '.incbin "$<" '; \
echo '__efi_hello_world_end:'; \
echo '.global __efi_hello_world_end'; \
echo '.balign 16'; \
) > $@
$(obj)/%_efi.S: $(obj)/%.efi
$(call cmd,S_efi)
$(obj)/%.efi: $(obj)/%.so
$(OBJCOPY) -j .header -j .text -j .sdata -j .data -j .dynamic \
-j .dynsym -j .rel* -j .rela* -j .reloc \
$(if $(EFI_TARGET),$(EFI_TARGET),-O binary) $^ $@
EFI_LDS_PATH = $(srctree)/arch/$(ARCH)/lib/$(EFI_LDS)
$(obj)/helloworld.so: $(EFI_LDS_PATH)
$(obj)/helloworld.so: $(obj)/helloworld.o arch/$(ARCH)/lib/$(EFI_CRT0) \
arch/$(ARCH)/lib/$(EFI_RELOC)
$(LD) -nostdlib -znocombreloc -T $(EFI_LDS_PATH) -shared -Bsymbolic \
$^ -o $@
# ACPI
# ---------------------------------------------------------------------------
quiet_cmd_acpi_c_asl= ASL $<