Package: gcc-6
Version: 6.3.0-14
Severity: normal
Dear maintainer,
in attached file you can see the code from CRIU project. gcc-6 fails to compile
it,
while gcc-4.9 has no such problem.
$ gcc-6 call32.S
/usr/bin/ld: /tmp/cczRnuRR.o: relocation R_X86_64_32S against `.text' can not
be used when making a shared object; recompile with -fPIC
/usr/bin/ld: final link failed: Nonrepresentable section on output
collect2: error: ld returned 1 exit status
(The code is borrowed from Linux kernel and it also can be found at
<linux kernel>/tools/testing/selftests/x86/thunks.S file).
Regards,
Kirill
--- System information. ---
Architecture:
Kernel: Linux 4.11.0-rc7+
Debian Release: 9.0
500 unstable ftp.ru.debian.org
500 testing ftp.ru.debian.org
500 stable-updates ftp.ru.debian.org
500 stable security.debian.org
500 stable repo.skype.com
500 stable ftp.ru.debian.org
1 experimental ftp.ru.debian.org
--- Package information. ---
Depends (Version) | Installed
==============================-+-==============
cpp-6 (= 6.3.0-14) | 6.3.0-14
gcc-6-base (= 6.3.0-14) |
libcc1-0 (>= 6.3.0-14) |
binutils (>= 2.28) |
libgcc-6-dev (= 6.3.0-14) |
libc6 (>= 2.14) |
libgcc1 (>= 1:3.0) |
libgmp10 (>= 2:5.0.1~) |
libisl15 (>= 0.15) |
libmpc3 |
libmpfr4 (>= 3.1.3) |
libstdc++6 (>= 5) |
zlib1g (>= 1:1.1.4) |
Recommends (Version) | Installed
==========================-+-============
libc6-dev (>= 2.13-5) | 2.24-10
Suggests (Version) | Installed
====================================-+-================
gcc-6-multilib | 6.3.0-14
gcc-6-doc (>= 6.3.0-1) |
gcc-6-locales (>= 6.3.0-1) |
libgcc1-dbg (>= 1:6.3.0-14) |
libgomp1-dbg (>= 6.3.0-14) |
libitm1-dbg (>= 6.3.0-14) |
libatomic1-dbg (>= 6.3.0-14) |
libasan3-dbg (>= 6.3.0-14) |
liblsan0-dbg (>= 6.3.0-14) |
libtsan0-dbg (>= 6.3.0-14) |
libubsan0-dbg (>= 6.3.0-14) |
libcilkrts5-dbg (>= 6.3.0-14) |
libmpx2-dbg (>= 6.3.0-14) |
libquadmath0-dbg (>= 6.3.0-14) |
/*
* call32.S - assembly helpers for mixed-bitness code
* From kernel selftests originally: tools/testing/selftests/x86/thunks.S
* Copyright (c) 2015 Andrew Lutomirski
*
* This program is free software; you can redistribute it and/or modify
* it under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* These are little helpers that make it easier to switch bitness on
* the fly.
*/
#define __ALIGN .align 4, 0x90
#define __ALIGN_STR ".align 4, 0x90"
#define GLOBAL(name) \
.globl name; \
name:
#define ENTRY(name) \
.globl name; \
.type name, @function; \
__ALIGN; \
name:
#define END(sym) \
.size sym, . - sym
#define __USER32_CS 0x23
#define __USER_CS 0x33
.text
/*
* @rdi: Stack to use
* @esi: Pointer to function for calling
*/
ENTRY(call32_from_64)
/* Callee-saving registers due to ABI */
pushq %rbx
pushq %rbp
pushq %r12
pushq %r13
pushq %r14
pushq %r15
pushfq
/* Switch stacks */
sub $8, %rdi
mov %rsp,(%rdi)
mov %rdi,%rsp
/* Switch into compatibility mode */
pushq $__USER32_CS
pushq $1f
lretq
1:
.code32
/* Run function and switch back */
call *%esi
jmp $__USER_CS,$1f
.code64
1:
/* Restore the stack */
mov (%rsp),%rsp
add $8, %rdi
/* Restore registers */
popfq
popq %r15
popq %r14
popq %r13
popq %r12
popq %rbp
popq %rbx
ret
END(call32_from_64)
ENTRY(main)
nop
END(main)
