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https://gitlab.com/qemu-project/ipxe.git
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1b99ba2a93
Some versions of GNU ld (observed with binutils 2.36 on Arch Linux) introduce a .note.gnu.property section marked as loadable at a high address and with non-empty contents. This adds approximately 128MB of garbage to the BIOS .usb disk images. Fix by using a custom linker script for the prefix-only binaries such as the USB disk partition table and MBR, in order to allow unwanted sections to be explicitly discarded. Reported-by: Christian Hesse <mail@eworm.de> Tested-by: Christian Hesse <mail@eworm.de> Signed-off-by: Michael Brown <mcb30@ipxe.org>
95 lines
2.1 KiB
Makefile
95 lines
2.1 KiB
Makefile
# -*- makefile -*- : Force emacs to use Makefile mode
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# BIOS-specific directories containing source files
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#
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SRCDIRS += arch/x86/drivers/net
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# The linker scripts
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#
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LDSCRIPT = arch/x86/scripts/pcbios.lds
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LDSCRIPT_PREFIX = arch/x86/scripts/prefixonly.lds
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# Stop ld from complaining about our customised linker script
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#
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LDFLAGS += -N --no-check-sections
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# Media types.
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#
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MEDIA += rom
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MEDIA += mrom
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MEDIA += pcirom
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MEDIA += isarom
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MEDIA += pxe
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MEDIA += kpxe
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MEDIA += kkpxe
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MEDIA += kkkpxe
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MEDIA += lkrn
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MEDIA += dsk
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MEDIA += nbi
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MEDIA += hd
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MEDIA += raw
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MEDIA += exe
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# Padding rules
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#
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PAD_rom = $(PERL) $(PADIMG) --blksize=512 --byte=0xff
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PAD_mrom = $(PAD_rom)
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PAD_pcirom = $(PAD_rom)
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PAD_isarom = $(PAD_rom)
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PAD_dsk = $(PERL) $(PADIMG) --blksize=512
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PAD_hd = $(PERL) $(PADIMG) --blksize=32768
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PAD_exe = $(PERL) $(PADIMG) --blksize=512
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# Finalisation rules
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#
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FINALISE_rom = $(PERL) $(FIXROM)
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FINALISE_mrom = $(FINALISE_rom)
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FINALISE_pcirom = $(FINALISE_rom)
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FINALISE_isarom = $(FINALISE_rom)
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# Use $(ROMS) rather than $(DRIVERS) for "allroms", "allmroms", etc.
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#
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LIST_NAME_rom := ROMS
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LIST_NAME_mrom := ROMS
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LIST_NAME_pcirom := ROMS
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LIST_NAME_isarom := ROMS
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# ISO or FAT filesystem images
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NON_AUTO_MEDIA += iso
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$(BIN)/%.iso $(BIN)/%.sdsk: $(BIN)/%.lkrn util/genfsimg
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$(QM)$(ECHO) " [GENFSIMG] $@"
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$(Q)util/genfsimg -o $@ $<
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# rule to write disk images to /dev/fd0
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NON_AUTO_MEDIA += fd0
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%fd0 : %dsk
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$(QM)$(ECHO) " [DD] $@"
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$(Q)dd if=$< bs=512 conv=sync of=/dev/fd0
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$(Q)sync
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# Special target for building Master Boot Record binary
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$(BIN)/mbr.tmp : $(BIN)/mbr.o
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$(QM)$(ECHO) " [LD] $@"
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$(Q)$(LD) $(LDFLAGS) -T $(LDSCRIPT_PREFIX) -o $@ -e mbr $<
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# rule to make a USB disk image
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$(BIN)/usbdisk.tmp : $(BIN)/usbdisk.o
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$(QM)$(ECHO) " [LD] $@"
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$(Q)$(LD) $(LDFLAGS) -T $(LDSCRIPT_PREFIX) -o $@ -e mbr $<
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NON_AUTO_MEDIA += usb
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%usb: $(BIN)/usbdisk.bin %hd
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$(QM)$(ECHO) " [FINISH] $@"
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$(Q)cat $^ > $@
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NON_AUTO_MEDIA += vhd
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%vhd: %usb
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$(QM)$(ECHO) " [FINISH] $@"
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$(Q)$(QEMUIMG) convert -f raw -O vpc $< $@
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# Padded floppy image (e.g. for iLO)
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NON_AUTO_MEDIA += pdsk
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%pdsk : %dsk
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$(Q)cp $< $@
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$(Q)$(PADIMG) --blksize=1474560 $@
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