mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-30 23:54:04 +08:00
27f2a4db76
GDB produces the following warning when debugging kernels built with CONFIG_RELR: BFD: /android0/linux-next/vmlinux: unknown type [0x13] section `.relr.dyn' when loading a kernel built with CONFIG_RELR into GDB. It can also prevent debugging symbols using such relocations. Peter sugguests: [That flag] means that lld will use dynamic tags and section type numbers in the OS-specific range rather than the generic range. The kernel itself doesn't care about these numbers; it determines the location of the RELR section using symbols defined by a linker script. Link: https://github.com/ClangBuiltLinux/linux/issues/1057 Suggested-by: Peter Collingbourne <pcc@google.com> Reviewed-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Link: https://lore.kernel.org/r/20210522012626.2811297-1-ndesaulniers@google.com Signed-off-by: Will Deacon <will@kernel.org>
18 lines
546 B
Bash
Executable File
18 lines
546 B
Bash
Executable File
#!/bin/sh -eu
|
|
# SPDX-License-Identifier: GPL-2.0
|
|
|
|
tmp_file=$(mktemp)
|
|
trap "rm -f $tmp_file.o $tmp_file $tmp_file.bin" EXIT
|
|
|
|
cat << "END" | $CC -c -x c - -o $tmp_file.o >/dev/null 2>&1
|
|
void *p = &p;
|
|
END
|
|
$LD $tmp_file.o -shared -Bsymbolic --pack-dyn-relocs=relr \
|
|
--use-android-relr-tags -o $tmp_file
|
|
|
|
# Despite printing an error message, GNU nm still exits with exit code 0 if it
|
|
# sees a relr section. So we need to check that nothing is printed to stderr.
|
|
test -z "$($NM $tmp_file 2>&1 >/dev/null)"
|
|
|
|
$OBJCOPY -O binary $tmp_file $tmp_file.bin
|