NetBSD Problem Report #45520

From is@netbsd.org  Tue Oct 25 07:57:38 2011
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Message-Id: <20111025075731.7C58C207AE@beverly.kleinbus.org>
Date: Tue, 25 Oct 2011 09:57:31 +0200 (CEST)
From: is@netbsd.org
Reply-To: is@netbsd.org
To: gnats-bugs@gnats.NetBSD.org
Subject: -pie broken, breaks some pkgsrc builds.
X-Send-Pr-Version: 3.95

>Number:         45520
>Category:       port-arm
>Synopsis:       execution of pie is broken, resulting in some broken pkgs
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    port-arm-maintainer
>State:          closed
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Oct 25 08:00:00 +0000 2011
>Closed-Date:    Fri Sep 30 08:25:13 +0000 2016
>Last-Modified:  Fri Sep 30 08:25:13 +0000 2016
>Originator:     Ignatios Souvatzis
>Release:        NetBSD 5.1
>Organization:
seal your e-mail: http://www.gnupg.org/
>Environment:


System: NetBSD marie 5.1 NetBSD 5.1 (MARIE) #0: Wed Jan 5 20:52:48 CET 2011 ignatios@random87:/var/itch/obj/shark/sys/arch/shark/compile/MARIE shark
Architecture: arm
Machine: shark
>Description:
PIE executables on ARM get SIGABORT.
>How-To-Repeat:
Try to build print/cups - it uses -pie in a lot of places, including
a helper program called "mantohtml" which is further used to translate
documentation, and results in aborts. Faster test:
% cat hello.c
int main() {
	write(1, "hello\n", 6);
	return 0;
}
% cat Makefile
MKMAN=no
PROG=hello
CFLAGS=-pie
LDFLAGS=-pie

.include <bsd.prog.mk>

test: hello
	./hello
% make test
#   compile  hello/hello.o
cc -pie   -Werror      -c    hello.c
#      link  hello/hello
cc     -pie      -o hello  hello.o          -Wl,-rpath-link,/lib  -L/lib -Wl,-rpath-link,/usr/lib  -L/usr/lib
./hello
*** Signal 6

Stop.
make: stopped in /home/is/ctest/hello
make: stopped in /home/is/ctest/hello
>Fix:
	Workaround might be to remove -pie everywhere.

>Release-Note:

>Audit-Trail:

From: christos@zoulas.com (Christos Zoulas)
To: gnats-bugs@NetBSD.org, port-arm-maintainer@netbsd.org, 
	gnats-admin@netbsd.org, netbsd-bugs@netbsd.org
Cc: 
Subject: Re: port-arm/45520: -pie broken, breaks some pkgsrc builds.
Date: Tue, 25 Oct 2011 10:26:03 -0400

 On Oct 25,  8:00am, is@beverly.kleinbus.org (is@beverly.kleinbus.org) wrote:
 -- Subject: port-arm/45520: -pie broken, breaks some pkgsrc builds.

 | #   compile  hello/hello.o
 | cc -pie   -Werror      -c    hello.c
 | #      link  hello/hello
 | cc     -pie      -o hello  hello.o          -Wl,-rpath-link,/lib  -L/lib -Wl,-rpath-link,/usr/lib  -L/usr/lib
 | ./hello
 | *** Signal 6

 >From the gcc manual:

      -pie
          Produce a position independent executable on targets which support
          it.  For predictable results, you must also specify the same set of
          options that were used to generate code (-fpie, -fPIE, or model sub-
          options) when you specify this option.

 christos

From: is@netbsd.org
To: gnats-bugs@NetBSD.org
Cc: 
Subject: Re: port-arm/45520: -pie broken, breaks some pkgsrc builds.
Date: Tue, 25 Oct 2011 22:41:34 +0200

 On Tue, Oct 25, 2011 at 02:30:05PM +0000, Christos Zoulas wrote:

 >  >From the gcc manual:
 >  
 >       -pie
 >           Produce a position independent executable on targets which support
 >           it.  For predictable results, you must also specify the same set of
 >           options that were used to generate code (-fpie, -fPIE, or model sub-
 >           options) when you specify this option.

 ENOPARSE (I read that sentence in the manual myself, and didn't
 understand it.) Same options when using the compiler as to when
 what?

 My demo program/Makefile is about the minimum I could distill the
 mantohtml rules used when making the cups package - at least I
 think so, and it breaks the same way on arm as the mantohtml, and
 works the same way on i386 and amd64 as mantohtml. If options should
 be added for right usage, please advise.

 	-is

From: christos@zoulas.com (Christos Zoulas)
To: gnats-bugs@NetBSD.org, port-arm-maintainer@netbsd.org, 
	gnats-admin@netbsd.org, netbsd-bugs@netbsd.org, is@netbsd.org
Cc: 
Subject: Re: port-arm/45520: -pie broken, breaks some pkgsrc builds.
Date: Tue, 25 Oct 2011 17:35:42 -0400

 On Oct 25,  8:45pm, is@netbsd.org (is@netbsd.org) wrote:
 -- Subject: Re: port-arm/45520: -pie broken, breaks some pkgsrc builds.

 | The following reply was made to PR port-arm/45520; it has been noted by GNATS.
 | 
 | From: is@netbsd.org
 | To: gnats-bugs@NetBSD.org
 | Cc: 
 | Subject: Re: port-arm/45520: -pie broken, breaks some pkgsrc builds.
 | Date: Tue, 25 Oct 2011 22:41:34 +0200
 | 
 |  On Tue, Oct 25, 2011 at 02:30:05PM +0000, Christos Zoulas wrote:
 |  
 |  >  >From the gcc manual:
 |  >  
 |  >       -pie
 |  >           Produce a position independent executable on targets which support
 |  >           it.  For predictable results, you must also specify the same set of
 |  >           options that were used to generate code (-fpie, -fPIE, or model sub-
 |  >           options) when you specify this option.
 |  
 |  ENOPARSE (I read that sentence in the manual myself, and didn't
 |  understand it.) Same options when using the compiler as to when
 |  what?
 |  
 |  My demo program/Makefile is about the minimum I could distill the
 |  mantohtml rules used when making the cups package - at least I
 |  think so, and it breaks the same way on arm as the mantohtml, and
 |  works the same way on i386 and amd64 as mantohtml. If options should
 |  be added for right usage, please advise.


 cc -fpie -pie hello.c -o hello

 christos

From: Ignatios Souvatzis <is@netbsd.org>
To: gnats-bugs@NetBSD.org
Cc: port-arm-maintainer@netbsd.org, gnats-admin@netbsd.org,
	netbsd-bugs@netbsd.org, is@netbsd.org
Subject: Re: port-arm/45520: -pie broken, breaks some pkgsrc builds.
Date: Wed, 26 Oct 2011 09:52:06 +0200

 No change:

 marie hello !% cc -pie -fpie -o hello hello.c 
 marie hello !% ./hello
 Abort
 marie hello !% cc -pie -fPIE -o hello hello.c
 marie hello !% ./hello
 Abort
 e hello !% ktrace ./hello
 Abort
 marie hello !% kdump
   6181      1 ktrace   EMUL  "netbsd"
   6181      1 ktrace   RET   ktrace 0
   6181      1 ktrace   CALL  execve(0xeffff897,0xefffe794,0xefffe79c)
   6181      1 ktrace   NAMI  "./hello"
   6181      1 ktrace   NAMI  "/usr/libexec/ld.elf_so"


From: christos@zoulas.com (Christos Zoulas)
To: Ignatios Souvatzis <is@netbsd.org>, gnats-bugs@NetBSD.org
Cc: port-arm-maintainer@netbsd.org, gnats-admin@netbsd.org, 
	netbsd-bugs@netbsd.org, is@netbsd.org
Subject: Re: port-arm/45520: -pie broken, breaks some pkgsrc builds.
Date: Wed, 26 Oct 2011 11:26:15 -0400

 On Oct 26,  9:52am, is@netbsd.org (Ignatios Souvatzis) wrote:
 -- Subject: Re: port-arm/45520: -pie broken, breaks some pkgsrc builds.

 | No change:
 | 
 | marie hello !% cc -pie -fpie -o hello hello.c 
 | marie hello !% ./hello
 | Abort
 | marie hello !% cc -pie -fPIE -o hello hello.c
 | marie hello !% ./hello
 | Abort
 | e hello !% ktrace ./hello
 | Abort

 Try with:

 cc -pie -fPIE -o hello hello.c -lgcc_s

 I'll boot my arm box and fix it.

 christos

From: christos@zoulas.com (Christos Zoulas)
To: Ignatios Souvatzis <is@netbsd.org>, gnats-bugs@NetBSD.org
Cc: port-arm-maintainer@netbsd.org, gnats-admin@netbsd.org, 
	netbsd-bugs@netbsd.org, is@netbsd.org
Subject: Re: port-arm/45520: -pie broken, breaks some pkgsrc builds.
Date: Wed, 26 Oct 2011 11:29:51 -0400

 On Oct 26,  9:52am, is@netbsd.org (Ignatios Souvatzis) wrote:
 -- Subject: Re: port-arm/45520: -pie broken, breaks some pkgsrc builds.

 | No change:
 | 
 | marie hello !% cc -pie -fpie -o hello hello.c 
 | marie hello !% ./hello
 | Abort
 | marie hello !% cc -pie -fPIE -o hello hello.c
 | marie hello !% ./hello
 | Abort
 | e hello !% ktrace ./hello
 | Abort
 | marie hello !% kdump
 |   6181      1 ktrace   EMUL  "netbsd"
 |   6181      1 ktrace   RET   ktrace 0
 |   6181      1 ktrace   CALL  execve(0xeffff897,0xefffe794,0xefffe79c)
 |   6181      1 ktrace   NAMI  "./hello"
 |   6181      1 ktrace   NAMI  "/usr/libexec/ld.elf_so"
 | 

 pit:~ [11:26am] 4>cat > hello.c
 #include <stdio.h>

 int
 main(int argc, char *argv[])
 {
         printf("hello world\n");
 	return 0;
 }
 pit:~ [11:27am] 5>cc -fpie -pie hello.c -o hello -lgcc_s
 pit:~ [11:27am] 6>./hello 
 hello world
 pit:~ [11:27am] 7>cc -fpie -pie hello.c -o hello 
 pit:~ [11:28am] 8>./hello
 hello world
 pit:~ [11:28am] 9>cc -pie hello.c -o hello
 pit:~ [11:28am] 10>./hello
 hello world
 pit:~ [11:28am] 11>file hello
 hello: ELF 32-bit LSB shared object, ARM, version 1, dynamically linked (uses shared libs), for NetBSD 5.99.40, not stripped
 pit:~ [11:28am] 12>

 christos

From: Matt Thomas <matt@3am-software.com>
To: Christos Zoulas <christos@zoulas.com>
Cc: Ignatios Souvatzis <is@netbsd.org>,
 gnats-bugs@NetBSD.org,
 port-arm-maintainer@netbsd.org,
 gnats-admin@netbsd.org,
 netbsd-bugs@netbsd.org,
 is@netbsd.org
Subject: Re: port-arm/45520: -pie broken, breaks some pkgsrc builds.
Date: Wed, 26 Oct 2011 08:46:11 -0700

 On Oct 26, 2011, at 8:26 AM, Christos Zoulas wrote:

 > On Oct 26,  9:52am, is@netbsd.org (Ignatios Souvatzis) wrote:
 > -- Subject: Re: port-arm/45520: -pie broken, breaks some pkgsrc builds.
 > 
 > | No change:
 > | 
 > | marie hello !% cc -pie -fpie -o hello hello.c 
 > | marie hello !% ./hello
 > | Abort
 > | marie hello !% cc -pie -fPIE -o hello hello.c
 > | marie hello !% ./hello
 > | Abort
 > | e hello !% ktrace ./hello
 > | Abort
 > 
 > Try with:
 > 
 > cc -pie -fPIE -o hello hello.c -lgcc_s
 > 
 > I'll boot my arm box and fix it.

 doesn't crt0 need to be compiled with -fpie as well?

From: is@netbsd.org
To: Christos Zoulas <christos@zoulas.com>
Cc: gnats-bugs@NetBSD.org, port-arm-maintainer@netbsd.org,
	gnats-admin@netbsd.org, netbsd-bugs@netbsd.org, is@netbsd.org
Subject: Re: port-arm/45520: -pie broken, breaks some pkgsrc builds.
Date: Wed, 26 Oct 2011 21:08:07 +0200

 On Wed, Oct 26, 2011 at 11:29:51AM -0400, Christos Zoulas wrote:

 > pit:~ [11:28am] 9>cc -pie hello.c -o hello
 > pit:~ [11:28am] 10>./hello
 > hello world
 > pit:~ [11:28am] 11>file hello
 > hello: ELF 32-bit LSB shared object, ARM, version 1, dynamically linked (uses shared libs), for NetBSD 5.99.40, not stripped
 > pit:~ [11:28am] 12>

 Now - to identify what needs to be pulled up and whether this is 
 possible - is this a changed kernel (exec stuff), ld.elf_so or gcc?

 Here they are:

 marie hello !% uname -a
 NetBSD marie 5.1 NetBSD 5.1 (MARIE) #0: Wed Jan  5 20:52:48 CET 2011  ignatios@random87:/var/itch/obj/shark/sys/arch/shark/compile/MARIE shark

 marie hello !% gcc -v
 Using built-in specs.
 Target: arm--netbsdelf
 Configured with: /usr/src/tools/gcc/../../gnu/dist/gcc4/configure --enable-long-long --disable-multilib --enable-threads --disable-symvers --build=x86_64-unknown-netbsd4.99.72 --host=arm--netbsdelf --target=arm--netbsdelf --enable-__cxa_atexit
 Thread model: posix
 gcc version 4.1.3 20080704 prerelease (NetBSD nb2 20081120)

 Regards,
 	-is

From: christos@zoulas.com (Christos Zoulas)
To: is@netbsd.org
Cc: gnats-bugs@NetBSD.org, port-arm-maintainer@netbsd.org, 
	gnats-admin@netbsd.org, netbsd-bugs@netbsd.org
Subject: Re: port-arm/45520: -pie broken, breaks some pkgsrc builds.
Date: Wed, 26 Oct 2011 15:16:45 -0400

 On Oct 26,  9:08pm, is@netbsd.org (is@netbsd.org) wrote:
 -- Subject: Re: port-arm/45520: -pie broken, breaks some pkgsrc builds.

 | On Wed, Oct 26, 2011 at 11:29:51AM -0400, Christos Zoulas wrote:
 | 
 | > pit:~ [11:28am] 9>cc -pie hello.c -o hello
 | > pit:~ [11:28am] 10>./hello
 | > hello world
 | > pit:~ [11:28am] 11>file hello
 | > hello: ELF 32-bit LSB shared object, ARM, version 1, dynamically linked (uses shared libs), for NetBSD 5.99.40, not stripped
 | > pit:~ [11:28am] 12>
 | 
 | Now - to identify what needs to be pulled up and whether this is 
 | possible - is this a changed kernel (exec stuff), ld.elf_so or gcc?

 Perhaps this is what you want:

 exec_elf.c:revision 1.13
 date: 2010/02/22 19:46:18;  author: drochner;  state: Exp;  lines: +15 -3
 branches:  1.13.2;
 Run binaries with ELF_TYPE==DYN at virtual address PAGE_SIZE rather
 than 0. This is still not the intent of PIE, but it allows them to
 run with VA 0 disabled.
 (The PAX_ASLR stuff which should deal with this needs work.)

 Or try sysctl -w vm.user_va0_disable=0

 christos

From: Ignatios Souvatzis <presse@ycm-bonn.de>
To: gnats-bugs@NetBSD.org
Cc: port-arm-maintainer@netbsd.org, gnats-admin@netbsd.org,
	netbsd-bugs@netbsd.org, is@netbsd.org
Subject: Re: port-arm/45520: -pie broken, breaks some pkgsrc builds.
Date: Mon, 21 Nov 2011 11:18:37 +0100

 I've ported:

 >  exec_elf.c:revision 1.13

 rm -f .gdbinit
 touch .gdbinit
 #   compile  hello/hello.o
 cc -pie -fPIE   -Werror      -c    hello.c
 #      link  hello/hello
 cc     -pie      -o hello  hello.o -lgcc_s          -Wl,-rpath-link,/lib  -L/lib -Wl,-rpath-link,/usr/lib  -L/usr/lib
 marie hello !% make test
 ./hello
 vmcmd[0] = 0/0x1000 fd@0 prot=05 flags=4
 execve: vmcmd 0 failed: 12
 *** Signal 6

 Stop.
 make: stopped in /home/is/ctest/hello

 Regards,
 	-is

State-Changed-From-To: open->feedback
State-Changed-By: matt@NetBSD.org
State-Changed-When: Sat, 03 Aug 2013 21:40:17 +0000
State-Changed-Why:
pie should be working now


State-Changed-From-To: feedback->closed
State-Changed-By: dholland@NetBSD.org
State-Changed-When: Fri, 30 Sep 2016 08:25:13 +0000
State-Changed-Why:
pies are definitely working now


>Unformatted:

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