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| author | Vasily Gorbik <gor@linux.ibm.com> | 2018-06-27 17:10:14 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-07-02 11:24:58 +0200 |
| commit | 183ab05ff285555c56b7f00bb4fd52d80a9513fb (patch) | |
| tree | de41bc46e49ae9c232a7402ac5d68ea78b2356ac /arch/s390/boot | |
| parent | 8e533fdd092598db73312af801dbddea8cab6f9c (diff) | |
| download | linux-183ab05ff285555c56b7f00bb4fd52d80a9513fb.tar.bz2 | |
s390: get rid of the first mb of uncompressed image
Instead of generating uncompressed kernel image starting at 0, filling
first mb with zeros (with ".org 0x100000") and then trimming it off
from vmlinux.bin before compression, simply generate a kernel image
starting from 0x100000.
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/boot')
| -rw-r--r-- | arch/s390/boot/compressed/Makefile | 15 |
1 files changed, 4 insertions, 11 deletions
diff --git a/arch/s390/boot/compressed/Makefile b/arch/s390/boot/compressed/Makefile index 9d3bd7d066e9..04609478d18b 100644 --- a/arch/s390/boot/compressed/Makefile +++ b/arch/s390/boot/compressed/Makefile @@ -23,16 +23,12 @@ LDFLAGS_vmlinux := --oformat $(LD_BFD) -e startup -T $(obj)/vmlinux: $(obj)/vmlinux.lds $(objtree)/arch/s390/boot/startup.a $(OBJECTS) $(call if_changed,ld) -TRIM_HEAD_SIZE := 0x100000 - -sed-sizes := -e 's/^\([0-9a-fA-F]*\) . \(__bss_start\|_end\)$$/\#define SZ\2 (0x\1 - $(TRIM_HEAD_SIZE))/p' +# extract required uncompressed vmlinux symbols and adjust them to reflect offsets inside vmlinux.bin +sed-sizes := -e 's/^\([0-9a-fA-F]*\) . \(__bss_start\|_end\)$$/\#define SZ\2 (0x\1 - 0x100000)/p' quiet_cmd_sizes = GEN $@ cmd_sizes = $(NM) $< | sed -n $(sed-sizes) > $@ -quiet_cmd_trim_head = TRIM $@ - cmd_trim_head = tail -c +$$(($(TRIM_HEAD_SIZE) + 1)) $< > $@ - $(obj)/sizes.h: vmlinux $(call if_changed,sizes) @@ -42,13 +38,10 @@ $(obj)/head.o: $(obj)/sizes.h CFLAGS_misc.o += -I$(objtree)/$(obj) $(obj)/misc.o: $(obj)/sizes.h -OBJCOPYFLAGS_vmlinux.bin.full := -R .comment -S -$(obj)/vmlinux.bin.full: vmlinux +OBJCOPYFLAGS_vmlinux.bin := -R .comment -S +$(obj)/vmlinux.bin: vmlinux $(call if_changed,objcopy) -$(obj)/vmlinux.bin: $(obj)/vmlinux.bin.full - $(call if_changed,trim_head) - vmlinux.bin.all-y := $(obj)/vmlinux.bin suffix-$(CONFIG_KERNEL_GZIP) := .gz |