b16257b51b
In GNU ld and ld.lld, -d is used with -r to allocate space to COMMON symbols. This behavior is presumably to work around legacy projects which inspect relocatable output by themselves and do not handle COMMON symbols. The GRUB does not do this. See https://github.com/llvm/llvm-project/issues/53660 -d is quite useless and ld.lld 15.0.0 will make -d no-op. COMMON symbols have special symbol resolution semantics which can cause surprise (see https://maskray.me/blog/2022-02-06-all-about-common-symbols). GCC<10 and Clang<11 defaulted to -fcommon. Just use -fno-common to avoid COMMON symbols. Signed-off-by: Fangrui Song <maskray@google.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
104 lines
3.0 KiB
Bash
104 lines
3.0 KiB
Bash
#! @BUILD_SHEBANG@
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set -e
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# Copyright (C) 2010 Free Software Foundation, Inc.
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#
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# This gensymlist.sh is free software; the author
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# gives unlimited permission to copy and/or distribute it,
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# with or without modifications, as long as this notice is preserved.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
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# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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# PARTICULAR PURPOSE.
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#
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# Example:
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#
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# genmod.sh moddep.lst normal.module build-grub-module-verifier normal.mod
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#
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moddep=$1
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infile=$2
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outfile=$4
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tmpfile=${outfile}.tmp
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modname=`echo $infile | sed -e 's@\.module.*$@@'`
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if ! grep ^$modname: $moddep >/dev/null; then
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echo "warning: moddep.lst has no dependencies for $modname" >&2
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exit 0
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fi
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deps=`grep ^$modname: $moddep | sed s@^.*:@@`
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# remove old files if any
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rm -f $tmpfile $outfile
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if test x@TARGET_APPLE_LINKER@ != x1; then
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# stripout .modname and .moddeps sections from input module
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@TARGET_OBJCOPY@ -R .modname -R .moddeps $infile $tmpfile
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# Attach .modname and .moddeps sections
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t1=`mktemp "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX"` || exit 1
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printf "$modname\0" >$t1
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t2=`mktemp "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX"` || exit 1
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for dep in $deps; do printf "$dep\0" >> $t2; done
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if test -n "$deps"; then
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@TARGET_OBJCOPY@ --add-section .modname=$t1 --add-section .moddeps=$t2 $tmpfile
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else
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@TARGET_OBJCOPY@ --add-section .modname=$t1 $tmpfile
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fi
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rm -f $t1 $t2
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if test x@platform@ != xemu; then
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@TARGET_STRIP@ --strip-unneeded \
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-K grub_mod_init -K grub_mod_fini \
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-K _grub_mod_init -K _grub_mod_fini \
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-R .note.gnu.gold-version -R .note.GNU-stack \
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-R .gnu.build.attributes \
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-R .rel.gnu.build.attributes \
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-R .rela.gnu.build.attributes \
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-R .eh_frame -R .rela.eh_frame -R .rel.eh_frame \
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-R .note -R .comment -R .ARM.exidx $tmpfile || exit 1
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fi
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if ! test -z "${TARGET_OBJ2ELF}"; then
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"${TARGET_OBJ2ELF}" $tmpfile || exit 1
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fi
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else
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tmpfile2=${outfile}.tmp2
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t1=${outfile}.t1.c
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t2=${outfile}.t2.c
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# remove old files if any
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rm -f $t1 $t2
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cp $infile $tmpfile
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# Attach .modname and .moddeps sections
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echo "char modname[] __attribute__ ((section(\"_modname, _modname\"))) = \"$modname\";" >$t1
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for dep in $deps; do echo "char moddep_$dep[] __attribute__ ((section(\"_moddeps, _moddeps\"))) = \"$dep\";" >>$t2; done
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if test -n "$deps"; then
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@TARGET_CC@ @TARGET_LDFLAGS@ -ffreestanding -nostdlib -o $tmpfile2 $t1 $t2 $tmpfile -Wl,-r
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else
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@TARGET_CC@ @TARGET_LDFLAGS@ -ffreestanding -nostdlib -o $tmpfile2 $t1 $tmpfile -Wl,-r
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fi
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rm -f $t1 $t2 $tmpfile
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mv $tmpfile2 $tmpfile
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cp $tmpfile $tmpfile.bin
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@TARGET_OBJCONV@ -f@TARGET_MODULE_FORMAT@ \
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-nr:_grub_mod_init:grub_mod_init \
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-nr:_grub_mod_fini:grub_mod_fini \
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-wd1106 -nu -nd $tmpfile.bin $tmpfile || exit 1
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rm -f $tmpfile.bin
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fi
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if test x@platform@ != xemu; then
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./build-grub-module-verifier@BUILD_EXEEXT@ $tmpfile @target_cpu@ @platform@
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fi
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mv $tmpfile $outfile
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