mirror of
https://github.com/systemd/systemd.git
synced 2024-11-30 22:03:41 +08:00
86 lines
2.7 KiB
Bash
Executable File
86 lines
2.7 KiB
Bash
Executable File
#!/usr/bin/env bash
|
|
# SPDX-License-Identifier: LGPL-2.1-or-later
|
|
|
|
set -e
|
|
|
|
if [[ $# -lt 2 ]]; then
|
|
echo "Usage: ${0} TARGET INPUT [GDBSCRIPT]"
|
|
echo "Debug systemd-boot/stub in QEMU."
|
|
echo
|
|
echo "TARGET should point to the EFI binary to be examined inside the"
|
|
echo "build directory (systemd-boot\$ARCH.efi or linux\$arch.efi.stub)."
|
|
echo
|
|
echo "INPUT should point to the QEMU serial output pipe. This is used to"
|
|
echo "extract the location of the symbols. For this to work, QEMU must"
|
|
echo "be run with '-s -serial pipe:PATH'. Note that QEMU will append"
|
|
echo ".in/.out to the path, while this script expects the out pipe directly."
|
|
echo
|
|
echo "If GDBSCRIPT is empty, gdb is run directly attached to the boot"
|
|
echo "loader, otherwise a script is generated in the given path that allows"
|
|
echo "attaching manually like this:"
|
|
echo " (gdb) source GDBSCRIPT"
|
|
echo " (gdb) target remote :1234"
|
|
echo
|
|
echo "Example usage:"
|
|
echo " mkfifo /tmp/sdboot.{in,out}"
|
|
echo " qemu-system-x86_64 [...] -s -serial pipe:/tmp/sdboot"
|
|
echo " ./tools/debug-sd-boot.sh ./build/src/boot/efi/systemd-bootx64.efi \\"
|
|
echo " /tmp/sdboot.out"
|
|
exit 1
|
|
fi
|
|
|
|
binary=$(realpath "${1}")
|
|
if [[ "${1}" =~ systemd-boot([[:alnum:]]+).efi ]]; then
|
|
target="systemd-boot"
|
|
symbols=$(realpath "$(dirname "${1}")/systemd_boot.so")
|
|
elif [[ "${1}" =~ linux([[:alnum:]]+).efi.stub ]]; then
|
|
target="systemd-stub"
|
|
symbols=$(realpath "$(dirname "${1}")/linux${BASH_REMATCH[1]}.elf.stub")
|
|
else
|
|
echo "Cannot detect EFI binary '${1}'."
|
|
exit 1
|
|
fi
|
|
|
|
case "${BASH_REMATCH[1]}" in
|
|
ia32) arch="i386";;
|
|
x64) arch="i386:x86-64";;
|
|
aa64) arch="aarch64";;
|
|
arm|riscv64) arch="${BASH_REMATCH[1]}";;
|
|
*)
|
|
echo "Unknown EFI arch '${BASH_REMATCH[1]}'."
|
|
exit 1
|
|
esac
|
|
|
|
# system-boot will print out a line like this to inform us where gdb is supposed to
|
|
# look for .text and .data section:
|
|
# systemd-boot@0x0,0x0
|
|
while read -r line; do
|
|
if [[ "${line}" =~ ${target}@(0x[[:xdigit:]]+),(0x[[:xdigit:]]+) ]]; then
|
|
text="${BASH_REMATCH[1]}"
|
|
data="${BASH_REMATCH[2]}"
|
|
break
|
|
fi
|
|
done < "${2}"
|
|
|
|
if [[ -z "${text}" || -z "${data}" ]]; then
|
|
echo "Could not determine text and data location."
|
|
exit 1
|
|
fi
|
|
|
|
if [[ -z "${3}" ]]; then
|
|
gdb_script=$(mktemp /tmp/debug-sd-boot.XXXXXX.gdb)
|
|
trap 'rm -f "${gdb_script}"' EXIT
|
|
else
|
|
gdb_script="${3}"
|
|
fi
|
|
|
|
echo "file ${binary}
|
|
add-symbol-file ${symbols} ${text} -s .data ${data}
|
|
set architecture ${arch}" > "${gdb_script}"
|
|
|
|
if [[ -z "${3}" ]]; then
|
|
gdb -x "${gdb_script}" -ex "target remote :1234"
|
|
else
|
|
echo "GDB script written to '${gdb_script}'."
|
|
fi
|