Hard-code ld.so paths for all architectures
This supports multiple ld.so files in a cleaner way. Also
forward-port multiple libc.so.6 file handling in
wrap-find-debuginfo.sh from downstream. This also incorporates
the “nm --format=posix“ change from #2115831 downstream.
Related: RHEL-35602
Fedora 40 commit: 4ccb7475fc
This commit is contained in:
Arjun Shankar
parent
b5be881eef
commit
ab55eeb40c
48
glibc.spec
48
glibc.spec
@ -230,6 +230,36 @@ Source11: parse-SUPPORTED.py
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# Include in the source RPM for reference.
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Source12: ChangeLog.old
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# ABI-specific program interpreter name. Used for debuginfo
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# extraction (wrap-find-debuginfo.sh) and smoke testing ($run_ldso below).
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%ifarch %{ix86}
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%global glibc_ldso /lib/ld-linux.so.2
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%endif
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%ifarch aarch64
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%global glibc_ldso /lib/ld-linux-aarch64.so.1
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%endif
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%ifarch ppc
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%global glibc_ldso /lib/ld.so.1
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%endif
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%ifarch ppc64
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%global glibc_ldso /lib64/ld64.so.1
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%endif
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%ifarch ppc64le
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%global glibc_ldso /lib64/ld64.so.2
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%endif
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%ifarch riscv64
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%global glibc_ldso /lib/ld-linux-riscv64-lp64d.so.1
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%endif
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%ifarch s390
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%global glibc_ldso /lib/ld.so.1
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%endif
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%ifarch s390x
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%global glibc_ldso /lib/ld64.so.1
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%endif
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%ifarch x86_64 x86_64_v2 x86_64_v3 x86_64_v4
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%global glibc_ldso /lib64/ld-linux-x86-64.so.2
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%endif
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######################################################################
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# Activate the wrapper script for debuginfo generation, by rewriting
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# the definition of __debug_install_post.
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@ -241,7 +271,7 @@ local original = rpm.expand("%{macrobody:__debug_install_post}")
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-- Avoid embedded newlines that confuse the macro definition.
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original = original:match("^%s*(.-)%s*$"):gsub("\\\n", "")
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rpm.define("__debug_install_post bash " .. wrapper
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.. " " .. sysroot .. " " .. original)
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.. " " .. sysroot .. " %{glibc_ldso} " .. original)
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}
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# sysroot package support. These contain arch-specific packages, so
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@ -1361,7 +1391,7 @@ build build-%{target}-32 \
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# Default set of compiler options.
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build build-%{target} \
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CC="gcc $glibc_flags_cc $glibc_flags_cc_main" \
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CXX="gcc $glibc_flags_cc $glibc_flags_cc_main" \
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CXX="g++ $glibc_flags_cc $glibc_flags_cc_main" \
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CFLAGS="$glibc_flags_cflags" \
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%ifarch x86_64
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--enable-cet \
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@ -2202,19 +2232,7 @@ echo ====================PLT RELOCS LIBC.SO==============
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readelf -Wr %{glibc_sysroot}/%{_lib}/libc-*.so | sed -n -e "$PLTCMD"
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echo ====================PLT RELOCS END==================
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# Obtain a way to run the dynamic loader. Avoid matching the symbolic
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# link and then pick the first loader (although there should be only
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# one). Use -maxdepth 2 to avoid descending into the /sys-root/
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# sub-tree. See wrap-find-debuginfo.sh.
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%ifarch x86_64
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# Hardcode the patch to avoid picking up the 32-bit dynamic linker from
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# glibc32; both 32-bit and 64-bit dynamic linkers will be present.
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ldso_path="%{glibc_sysroot}/lib64/ld-linux-x86-64.so.2"
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%else
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ldso_path="$(find %{glibc_sysroot}/ -maxdepth 2 -regextype posix-extended \
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-regex '.*/ld(-.*|64|)\.so\.[0-9]+$' -type f | LC_ALL=C sort | head -n1)"
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%endif
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run_ldso="$ldso_path --library-path %{glibc_sysroot}/%{_lib}"
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run_ldso="%{glibc_sysroot}/%{glibc_ldso} --library-path %{glibc_sysroot}/%{_lib}"
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# Show the auxiliary vector as seen by the new library
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# (even if we do not perform the valgrind test).
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@ -18,7 +18,13 @@ set -ex
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workdir="$(mktemp -d -t find_debuginfo.XXXXXX)"
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ldso_tmp="$workdir/ld.so"
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libc_tmp="$workdir/libc.so"
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libc_tmp_dir="$workdir/"
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# Return the path where a libc should be saved temporarily. This path is
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# based on its original path received in $1.
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libc_tmp_path() {
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echo "$libc_tmp_dir"`dirname "$1"`"/libc.so"
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}
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# Prefer a separately installed debugedit over the RPM-integrated one.
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if command -v debugedit >/dev/null ; then
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@ -34,79 +40,42 @@ trap cleanup 0
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sysroot_path="$1"
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shift
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# Resolve symbolic link, so that the activities below only alter the
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# file it points to.
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ldso_path="$(readlink -f "$sysroot_path/$1")"
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shift
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script_path="$1"
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shift
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# See ldso_path setting in glibc.spec.
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ldso_path=
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for ldso_candidate in `find "$sysroot_path" -maxdepth 2 \
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-regextype posix-extended -regex '.*/ld(-.*|64|)\.so\.[0-9]+$' -type f` ; do
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if test -z "$ldso_path" ; then
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ldso_path="$ldso_candidate"
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elif [ -f "$sysroot_path/lib64/ld-linux-x86-64.so.2" ] && [ -f "$sysroot_path/lib/ld-linux.so.2" ]; then
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# x86_64 with 32-bit libc built for glibc32 as well. Finding
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# multiple dynamic linkers is expected, not a bug; ensure the
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# 64-bit one is used.
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ldso_path="$sysroot_path/lib64/ld-linux-x86-64.so.2"
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else
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echo "error: multiple ld.so candidates: $ldso_path, $ldso_candidate"
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exit 1
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fi
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done
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# libc.so.6 always uses this name, so it is simpler to locate.
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libc_path=
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for libc_candidate in `find "$sysroot_path" -maxdepth 2 -name libc.so.6`; do
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if test -z "$libc_path" ; then
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libc_path="$libc_candidate"
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elif [ -f "$sysroot_path/lib64/ld-linux-x86-64.so.2" ] && [ -f "$sysroot_path/lib/ld-linux.so.2" ]; then
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# x86_64 with 32-bit libc built for glibc32 as well. The test
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# here uses ld.so paths, not libc paths, to ensure it doesn't
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# apply on any other architecture.
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libc_path="$sysroot_path/lib64/libc.so.6"
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else
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echo "error: multiple libc.so.6 candidates: $libc_path, $libc_candidate"
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exit 1
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fi
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done
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# This can result in multiple paths, hence the loop below.
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libc_path=`find "$sysroot_path" -name libc.so.6`
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# Preserve the original files.
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cp "$ldso_path" "$ldso_tmp"
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cp "$libc_path" "$libc_tmp"
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for lib in $libc_path ; do
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libtmp=`libc_tmp_path $lib`
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mkdir -p `dirname "$libtmp"`
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cp "$lib" "$libtmp"
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done
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# Run the debuginfo extraction.
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"$script_path" "$@"
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for lib in $libc_path ; do
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libtmp=`libc_tmp_path "$lib"`
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# libc.so.6: Extract the .gnu_debuglink section
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objcopy -j.gnu_debuglink --set-section-flags .gnu_debuglink=alloc \
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-O binary "$libc_path" "$libc_tmp.debuglink"
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-O binary "$lib" "$libtmp.debuglink"
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# Restore the original files.
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cp "$ldso_tmp" "$ldso_path"
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cp "$libc_tmp" "$libc_path"
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cp "$libtmp" "$lib"
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# Reduce the size of notes. Primarily for annobin.
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objcopy --merge-notes "$ldso_path"
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objcopy --merge-notes "$libc_path"
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# Reduce the size of libc notes. Primarily for annobin.
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objcopy --merge-notes "$lib"
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# libc.so.6: Restore the .gnu_debuglink section
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objcopy --add-section .gnu_debuglink="$libc_tmp.debuglink" "$libc_path"
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# ld.so does not have separated debuginfo and so the debuginfo file
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# generated by find-debuginfo is redundant. Therefore, remove it.
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ldso_debug=
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for ldso_debug_candidate in `find "$sysroot_path" -maxdepth 2 \
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-regextype posix-extended \
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-regex '.*/ld(-.*|64|)\.so\.[0-9]+.*debug$' -type f` ; do
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if test -z "$ldso_debug" ; then
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ldso_debug="$ldso_debug_candidate"
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else
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echo "error: multiple ld.so debug candidates: $ldso_debug, $ldso_debug_candidate"
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exit 1
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fi
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done
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rm -f "$ldso_debug"
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objcopy --add-section .gnu_debuglink="$libtmp.debuglink" "$lib"
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# libc.so.6: Reduce to valuable symbols. Eliminate file symbols,
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# annobin symbols, and symbols used by the glibc build to implement
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@ -122,7 +91,29 @@ strip -w \
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-K '!.annobin_*' \
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-K '!__EI_*' \
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-K '!__PRETTY_FUNCTION__*' \
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"$libc_path"
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"$lib"
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done
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# Restore the original ld.so.
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cp "$ldso_tmp" "$ldso_path"
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# Reduce the size of notes. Primarily for annobin.
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objcopy --merge-notes "$ldso_path"
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# ld.so does not have separated debuginfo and so the debuginfo file
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# generated by find-debuginfo is redundant. Therefore, remove it.
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ldso_debug=
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for ldso_debug_candidate in `find "$sysroot_path" -maxdepth 2 \
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-regextype posix-extended \
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-regex '.*/ld(-.*|64|)\.so\.[0-9]+.*debug$' -type f` ; do
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if test -z "$ldso_debug" ; then
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ldso_debug="$ldso_debug_candidate"
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else
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echo "error: multiple ld.so debug candidates: $ldso_debug, $ldso_debug_candidate"
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exit 1
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fi
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done
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rm -f "$ldso_debug"
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# ld.so: Rewrite the source file paths to match the extracted
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# locations. First compute the arguments for invoking debugedit.
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@ -147,7 +138,7 @@ done
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debug_base_name=${last_arg:-$RPM_BUILD_ROOT}
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$debugedit -b "$debug_base_name" -d "$debug_dest_name" -n $ldso_path
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# Remove the .annobin* symbols (and only them).
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if nm --format=just-symbols "$ldso_path" \
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if nm --format=posix "$ldso_path" | cut -d' ' -f1 \
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| grep '^\.annobin' > "$ldso_tmp.annobin-symbols"; then
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objcopy --strip-symbols="$ldso_tmp.annobin-symbols" "$ldso_path"
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fi
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