From 183ab05ff285555c56b7f00bb4fd52d80a9513fb Mon Sep 17 00:00:00 2001 From: Vasily Gorbik Date: Wed, 27 Jun 2018 17:10:14 +0200 Subject: [PATCH] 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 Signed-off-by: Vasily Gorbik Signed-off-by: Martin Schwidefsky --- arch/s390/boot/compressed/Makefile | 15 ++++----------- arch/s390/kernel/head64.S | 1 - arch/s390/kernel/vmlinux.lds.S | 2 +- 3 files changed, 5 insertions(+), 13 deletions(-) diff --git a/arch/s390/boot/compressed/Makefile b/arch/s390/boot/compressed/Makefile index 9d3bd7d..0460947 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 diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S index 161b795..6f43fae 100644 --- a/arch/s390/kernel/head64.S +++ b/arch/s390/kernel/head64.S @@ -16,7 +16,6 @@ #include __HEAD - .org 0x100000 ENTRY(startup_continue) tm __LC_STFLE_FAC_LIST+5,0x80 # LPP available ? jz 0f diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S index 51adfe2..35f7ca8 100644 --- a/arch/s390/kernel/vmlinux.lds.S +++ b/arch/s390/kernel/vmlinux.lds.S @@ -30,7 +30,7 @@ PHDRS { SECTIONS { - . = 0x00000000; + . = 0x100000; .text : { /* Text and read-only data */ HEAD_TEXT -- 2.7.4