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| author | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2015-11-20 17:58:59 +0100 |
|---|---|---|
| committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2015-12-02 18:43:01 +0100 |
| commit | 0316e1a69fa5d60f70afca00686d4b18a04e6dd2 (patch) | |
| tree | aa074f350bf56cab1f2ff738937475183c83c4bf /util/cbfstool/Makefile | |
| parent | cbce4de97644e810251358fb212615a5b5244d42 (diff) | |
| download | coreboot-0316e1a69fa5d60f70afca00686d4b18a04e6dd2.tar.xz | |
cbfstool: autocreate trampoline
Add the code necessary to create the linux trampoline blob.
Don't enforce this for the in-coreboot build or use objcopy
to produce linux_trampoline.o as it is a bit trickier to get
all the details right than I had hoped:
- you have to know the elf architecture of the host machine
- you might have to have more tools (xxd, perl, etc) installed
Change-Id: I9b7877c58d90f9fb21d16e0061a31e19fffa2470
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: https://review.coreboot.org/12505
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
Diffstat (limited to 'util/cbfstool/Makefile')
| -rw-r--r-- | util/cbfstool/Makefile | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/util/cbfstool/Makefile b/util/cbfstool/Makefile index 085a19a481..b595297c8d 100644 --- a/util/cbfstool/Makefile +++ b/util/cbfstool/Makefile @@ -4,6 +4,7 @@ objutil ?= $(top)/util CONFIG_FMD_GENPARSER := y HOSTCC ?= $(CC) +OBJCOPY ?= objcopy .PHONY: all all: $(objutil)/cbfstool/cbfstool \ @@ -17,6 +18,18 @@ clean: $(RM) $(objutil)/cbfstool/fmaptool $(fmapobj) $(RM) $(objutil)/cbfstool/rmodtool $(rmodobj) +linux_trampoline.c: linux_trampoline.S + rm -f linux_trampoline.c + $(CC) -m32 -o linux_trampoline linux_trampoline.S -ffreestanding -nostdlib -nostdinc -Wl,--defsym=_start=0 + $(OBJCOPY) -Obinary -j .data linux_trampoline trampoline + echo "/* This file is automatically generated. Do not manually change */" > trampoline.c + xxd -c 16 -i trampoline >> trampoline.c + perl -pi -e 's,unsigned int.*$$,,g;s,unsigned char,const unsigned char,g' trampoline.c + echo "const void * const trampoline_start = &trampoline;" >> trampoline.c + echo "const unsigned long trampoline_size = sizeof trampoline;" >> trampoline.c + mv trampoline.c linux_trampoline.c + rm linux_trampoline trampoline + .SILENT: include Makefile.inc |