aa9bb6e81b
_MAINOBJECT #defined. Calls from all other files ended up in nirvana because the compiler was not able to calculate the address of the wrapper for the absolute call. The linker tried, but failed miserably. Use the -combine flag and compile all of initram at once. This enables GCC to calculate the address of the abscall wrapper, resulting in working code. Segher Boessenkool thinks the patched code works only by accident because GCC has no way to specify generation of XIP code. According to him, future GCC versions or other circumstances may break the code. While this patch makes code work for now, it does NOT check whether the generated code tries to write to memory outside the stack (general writable data). That will of course fail, but I hope porters are smart enough to avoid that. Corey Osgood writes: Great work tracking this down! This is okay for now, but we need to look for a better solution in the future. Counting on porters who may or may not remember this discussion to avoid something isn't good future-proofing. Checking the ELF sections for read-write data and stopping the build with an error could make this future-proof. Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Acked-by: Corey Osgood <corey.osgood@gmail.com> git-svn-id: svn://coreboot.org/repository/LinuxBIOSv3@537 f3766cd6-281f-0410-b1cd-43a5c92072e9
80 lines
3 KiB
Makefile
80 lines
3 KiB
Makefile
##
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## This file is part of the LinuxBIOS project.
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##
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## Copyright (C) 2006-2007 coresystems GmbH
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## (Written by Stefan Reinauer <stepan@coresystems.de> for coresystems GmbH)
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##
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## This program is free software; you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation; either version 2 of the License, or
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## (at your option) any later version.
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##
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## This program is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with this program; if not, write to the Free Software
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## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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##
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#
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# Miscellaneous mainboard specific build targets!
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#
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$(obj)/mainboard/$(MAINBOARDDIR)/statictree.o: $(obj)/mainboard/$(MAINBOARDDIR)/statictree.c $(obj)/statictree.h
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$(Q)printf " CC $(subst $(shell pwd)/,,$(@))\n"
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$(Q)$(CC) $(INITCFLAGS) $(LINUXBIOSINCLUDE) -c -o $@ $<
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$(obj)/mainboard/$(MAINBOARDDIR)/statictree.c: $(src)/mainboard/$(MAINBOARDDIR)/dts $(obj)/util/dtc/dtc
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$(Q)printf " DTC $(subst $(shell pwd)/,,$(@))\n"
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$(Q)$(obj)/util/dtc/dtc -O lb mainboard/$(MAINBOARDDIR)/dts > $@
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$(obj)/statictree.h: $(src)/mainboard/$(MAINBOARDDIR)/dts $(obj)/util/dtc/dtc
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$(Q)printf " DTC $(subst $(shell pwd)/,,$(@))\n"
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$(Q)$(obj)/util/dtc/dtc -O lbh mainboard/$(MAINBOARDDIR)/dts > $@
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$(obj)/mainboard/$(MAINBOARDDIR)/option_table.c: $(obj)/util/options/build_opt_tbl $(src)/mainboard/$(MAINBOARDDIR)/cmos.layout
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$(Q)printf " OPTIONS $(subst $(shell pwd)/,,$(@))\n"
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$(Q)mkdir -p $(obj)/mainboard/$(MAINBOARDDIR)
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$(Q)$(obj)/util/options/build_opt_tbl -b \
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--config $(src)/mainboard/$(MAINBOARDDIR)/cmos.layout \
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--option $(obj)/mainboard/$(MAINBOARDDIR)/option_table.c
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$(obj)/option_table: $(obj)/mainboard/$(MAINBOARDDIR)/option_table.o
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$(Q)printf " OBJCOPY $(subst $(shell pwd)/,,$(@))\n"
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$(Q)$(OBJCOPY) -O binary $< $@
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$(obj)/mainboard/$(MAINBOARDDIR)/%.o: $(src)/mainboard/$(MAINBOARDDIR)/%.c
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$(Q)mkdir -p $(obj)/mainboard/$(MAINBOARDDIR)
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$(Q)printf " CC $(subst $(shell pwd)/,,$(@))\n"
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$(Q)$(CC) $(INITCFLAGS) -c $< -o $@
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#
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# Miscellaneous superio specific build targets!
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#
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$(obj)/superio/%.o: $(src)/superio/%.c $(obj)/statictree.h
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$(Q)mkdir -p $(dir $@)
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$(Q)printf " CC $(subst $(shell pwd)/,,$(@))\n"
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$(Q)$(CC) $(INITCFLAGS) -c $< -o $@
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#
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# Miscellaneous northbridge specific build targets!
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#
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$(obj)/northbridge/%.o: $(src)/northbridge/%.c $(obj)/statictree.h
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$(Q)mkdir -p $(dir $@)
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$(Q)printf " CC $(subst $(shell pwd)/,,$(@))\n"
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$(Q)$(CC) $(INITCFLAGS) -c $< -o $@
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#
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# Miscellaneous southbridge specific build targets!
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#
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$(obj)/southbridge/%.o: $(src)/southbridge/%.c $(obj)/statictree.h
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$(Q)mkdir -p $(dir $@)
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$(Q)printf " CC $(subst $(shell pwd)/,,$(@))\n"
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$(Q)$(CC) $(INITCFLAGS) -c $< -o $@
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