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#!/usr/bin/env python3
# Copyright (c) Meta Platforms, Inc. and affiliates.
# SPDX-License-Identifier: LGPL-2.1-or-later
import argparse
import re
import subprocess
# Macros missing from glibc 2.17, which is the oldest version we test against
# (when we build manylinux2014 wheels).
MACROS = (
# Added in glibc 2.18.
"NT_FILE",
# Added in glibc 2.24.
"EM_RISCV",
# Added in glibc 2.27.
# We don't need all of the RISC-V relocation types, but it doesn't hurt.
"R_RISCV_NONE",
"R_RISCV_32",
"R_RISCV_64",
"R_RISCV_RELATIVE",
"R_RISCV_COPY",
"R_RISCV_JUMP_SLOT",
"R_RISCV_TLS_DTPMOD32",
"R_RISCV_TLS_DTPMOD64",
"R_RISCV_TLS_DTPREL32",
"R_RISCV_TLS_DTPREL64",
"R_RISCV_TLS_TPREL32",
"R_RISCV_TLS_TPREL64",
# Added in glibc 2.28.
"R_RISCV_BRANCH",
"R_RISCV_JAL",
"R_RISCV_CALL",
"R_RISCV_CALL_PLT",
"R_RISCV_GOT_HI20",
"R_RISCV_TLS_GOT_HI20",
"R_RISCV_TLS_GD_HI20",
"R_RISCV_PCREL_HI20",
"R_RISCV_PCREL_LO12_I",
"R_RISCV_PCREL_LO12_S",
"R_RISCV_HI20",
"R_RISCV_LO12_I",
"R_RISCV_LO12_S",
"R_RISCV_TPREL_HI20",
"R_RISCV_TPREL_LO12_I",
"R_RISCV_TPREL_LO12_S",
"R_RISCV_TPREL_ADD",
"R_RISCV_ADD8",
"R_RISCV_ADD16",
"R_RISCV_ADD32",
"R_RISCV_ADD64",
"R_RISCV_SUB8",
"R_RISCV_SUB16",
"R_RISCV_SUB32",
"R_RISCV_SUB64",
"R_RISCV_GNU_VTINHERIT",
"R_RISCV_GNU_VTENTRY",
"R_RISCV_ALIGN",
"R_RISCV_RVC_BRANCH",
"R_RISCV_RVC_JUMP",
"R_RISCV_RVC_LUI",
"R_RISCV_GPREL_I",
"R_RISCV_GPREL_S",
"R_RISCV_TPREL_I",
"R_RISCV_TPREL_S",
"R_RISCV_RELAX",
"R_RISCV_SUB6",
"R_RISCV_SET6",
"R_RISCV_SET8",
"R_RISCV_SET16",
"R_RISCV_SET32",
"R_RISCV_32_PCREL",
# Added in glibc 2.30.
"NT_ARM_PAC_MASK",
)
def main() -> None:
argparse.ArgumentParser(
description="Generate definitions missing from older versions of glibc for libdrgn/include/elf.h from elf.h"
).parse_args()
contents = subprocess.check_output(
["gcc", "-dD", "-E", "-"],
input="#include <elf.h>\n",
universal_newlines=True,
)
macros = {
match.group(1): match.group(2)
for match in re.finditer(
r"^\s*#\s*define\s+(" + "|".join(MACROS) + r")\s+(.*)",
contents,
re.MULTILINE,
)
}
print("// Generated by scripts/gen_elf_compat.py.")
for macro in MACROS:
print("#ifndef", macro)
print("#define", macro, macros[macro])
print("#endif")
if __name__ == "__main__":
main()
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