xref: /freebsd/sys/tools/amd64_ia32_vdso.sh (revision bd66c1b43e33540205dbc1187c2f2a15c58b57ba)
1#!/bin/sh
2# SPDX-License-Identifier: BSD-2-Clause
3#
4# Copyright (c) 2021 The FreeBSD Foundation
5# All rights reserved.
6#
7# This software was developed by Konstantin Belousov <kib@FreeBSD.org>
8# under sponsorship from the FreeBSD Foundation.
9#
10# Redistribution and use in source and binary forms, with or without
11# modification, are permitted provided that the following conditions
12# are met:
13# 1. Redistributions of source code must retain the above copyright
14#    notice, this list of conditions and the following disclaimer.
15# 2. Redistributions in binary form must reproduce the above copyright
16#    notice, this list of conditions and the following disclaimer in the
17#    documentation and/or other materials provided with the distribution.
18#
19# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29# SUCH DAMAGE.
30
31set -e
32
33${CC} -x assembler-with-cpp -DLOCORE -fPIC -nostdinc -c -m32 \
34   -o ia32_sigtramp.pico -I. -I"${S}" -include opt_global.h \
35   "${S}"/amd64/ia32/ia32_sigtramp.S
36
37if ${LD} --version | ${AWK} '/^GNU ld/{exit 1}' ; then
38    RODYNAMIC="-z rodynamic"
39else
40    RODYNAMIC=""
41fi
42${LD} --shared -Bsymbolic -soname="elf-vdso32.so.1" \
43   -T "${S}"/conf/vdso_amd64_ia32.ldscript \
44   --eh-frame-hdr --no-undefined ${RODYNAMIC} -z norelro -nmagic \
45   --hash-style=sysv --fatal-warnings --strip-all \
46   -o elf-vdso32.so.1 ia32_sigtramp.pico
47
48if [ "$(wc -c elf-vdso32.so.1 | ${AWK} '{print $1}')" -gt 2048 ]
49then
50    echo "elf-vdso32.so.1 too large" 1>&2
51    exit 1
52fi
53
54if [ -n "$(${ELFDUMP} -d elf-vdso32.so.1 | \
55  ${AWK} '/DT_REL.*SZ/{print "RELOCS"}')" ]
56then
57    echo "elf-vdso32.so.1 contains runtime relocations" 1>&2
58    exit 1
59fi
60
61${CC} ${DEBUG} -x assembler-with-cpp -DLOCORE -fPIC -nostdinc -c \
62   -o elf-vdso32.so.o -I. -I"${S}" -include opt_global.h \
63   -DVDSO_NAME=elf_vdso32_so_1 -DVDSO_FILE=\"elf-vdso32.so.1\" \
64   "${S}"/tools/vdso_wrap.S
65
66${NM} -D elf-vdso32.so.1 | ${AWK} \
67   '/__vdso_ia32_sigcode/{printf "#define VDSO_IA32_SIGCODE_OFFSET 0x%s\n",$1}
68    /__vdso_freebsd4_ia32_sigcode/{printf "#define VDSO_FREEBSD4_IA32_SIGCODE_OFFSET 0x%s\n",$1}
69    /__vdso_ia32_osigcode/{printf "#define VDSO_IA32_OSIGCODE_OFFSET 0x%s\n",$1}
70    /__vdso_lcall_tramp/{printf "#define VDSO_LCALL_TRAMP_OFFSET 0x%s\n",$1}' \
71   >vdso_ia32_offsets.h
72