kata-containers/s390-tools
1
0
Fork 0
mirror of https://github.com/ibm-s390-linux/s390-tools.git synced 2026-08-05 02:14:52 +00:00
Code Issues Packages Projects Releases Wiki Activity

zipl/boot: simplify objcopy commands

Browse Source 
Instead of maintaining an include list, use an exclude list (if
neccessary). This simplifies the `objcopy` calls a lot, and it's
possible because `objcopy -O binary` only includes the memory dump of
the contents of the input object file. [1] This means that sections like
for debug information that do not occupy memory during the process
execution are discarded by design. [2]

In addition, if we do not want a particular ELF section, we can list it
in the discard section of the linker script.

[1] https://man7.org/linux/man-pages/man1/objcopy.1.html
[2] https://man7.org/linux/man-pages/man5/elf.5.html

Reviewed-by: Stefan Haberland <sth@linux.ibm.com>
Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Marc Hartmayer
2023-01-27 16:44:02 +00:00
committed by Jan Höppner
parent 4bed503aa7
commit 60d03262d8
1 changed files with 1 additions and 31 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
zipl/boot/Makefile
View File

@@ -77,37 +77,7 @@ stage3.exec: head.o stage3.o kdump3.o libc.o ebcdic.o ebcdic_conv.o sclp.o \
$(LINK) $$SFLAGS $(NO_PIE_LDFLAGS) $(NO_WARN_RWX_SEGMENTS_LDFLAGS) -Wl,--build-id=none -m64 -static -nostdlib $(filter %.o, $^) -o $@
%.bin: %.exec
$(OBJCOPY) -O binary \
--only-section=.stage2.head \
--only-section=.text.dummy \
--only-section=.text.start \
--only-section=.text \
--only-section=.ex_table \
--only-section=.data \
--only-section=.rodata.str1.2 \
--only-section=.rodata.cst8 \
--only-section=.rodata \
--only-section=.stage2dump.tail \
--only-section=.eckd2dump_mv.tail \
--only-section=.fixup \
$< $@
stage3.bin: stage3.exec
$(OBJCOPY) -O binary \
--only-section=.stage2.head \
--only-section=.text.dummy \
--only-section=.text.start \
--only-section=.text \
--only-section=.ex_table \
--only-section=.data \
--only-section=.rodata.str1.2 \
--only-section=.rodata.cst8 \
--only-section=.rodata \
--only-section=.stage2dump.tail \
--only-section=.eckd2dump_mv.tail \
--only-section=.fixup \
--only-section=.sb.trailer \
$< $@
$(OBJCOPY) -O binary $< $@
data.o: $(FILES)
$(LINK) $(NO_PIE_LDFLAGS) -static -nostdlib -Wl,--relocatable -Wl,--format,binary -o data.o $(FILES)