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zipl/boot: use --no-warn-rwx-segments linker flag

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This disables the following warning `ld: warning: stage3.exec has a LOAD
segment with RWX permissions` for newer linker. This changes nothing in
functionality for the zipl bootloaders, since only the binaries and not
the ELF files are actually used.

Acked-by: Eduard Shishkin <edward6@linux.ibm.com>
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
2023-01-18 16:41:09 +00:00
committed by Jan Höppner
parent 3d168fac14
commit 4518bf7d73
2 changed files with 15 additions and 1 deletions
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14
common.mak
View File

@@ -145,6 +145,20 @@ then \
exit 1; \
fi
#
# Test for linker option
#
# $1: Linker option
#
# Returns the linker option if available and nothing otherwise
#
define test_linker_flag
$(shell printf "int main(void) {return 0;}\n" | \
( $(CC) "-Wl,$1" -o /dev/null -x c - ) >/dev/null 2>&1 && printf -- '-Wl,%s' "$1")
endef
NO_WARN_RWX_SEGMENTS_LDFLAGS := $(call test_linker_flag,"--no-warn-rwx-segments")
#
# Support alternate install root
#

2
zipl/boot/Makefile
View File

@@ -74,7 +74,7 @@ stage3.exec: head.o stage3.o kdump3.o libc.o ebcdic.o ebcdic_conv.o sclp.o \
2) SFLAGS="-Wl,-T,stage2.lds";; \
3) SFLAGS="-Wl,-T,stage3.lds";; \
esac; \
$(LINK) $$SFLAGS $(NO_PIE_LDFLAGS) -m64 -static -nostdlib $(filter %.o, $^) -o $@
$(LINK) $$SFLAGS $(NO_PIE_LDFLAGS) $(NO_WARN_RWX_SEGMENTS_LDFLAGS) -m64 -static -nostdlib $(filter %.o, $^) -o $@
%.bin: %.exec
$(OBJCOPY) -O binary \