similar to: [Blasphemy] Can I build dovecot with "-fstack-protector"?

JonY wrote: > What is your link test checking and how does it fail? My m4 macro is really simple, TRY_LINK a simple program with the stack protect CFLAGS: AC_DEFUN([XIPH_GCC_STACK_PROTECTOR], [AC_LANG_ASSERT(C) AC_MSG_CHECKING([if $CC supports stack smash protection]) xiph_stack_check_old_cflags="$CFLAGS" SSP_FLAGS="-fstack-protector --param ssp-buffer-size=4"

Hi all. For a while, gcc has supported a stack protection mechanism (-fstack-protector and friends, available in gcc 4.1.2 and up). Can anyone think of a good reason not to enable it if the compiler supports it? A quick test here shows minimal difference in runtime over a full regress pass (~10sec over 8.5 minutes, and since the machine is not entirely idle that could be experimental error).

Hello, Does the -fstack-protector option work on CLANG 3.1 and 3.2? There is thread on FreeBSD forums about the stack protector and ports and I'm wondering if it's possible to use the -fstack-protector option with CLANG. http://forums.freebsd.org/showthread.php?t=36927 -Kimmo

yo, ive been using the fstack protector for a while now and it worked fine until i was gonna compile 4.8p3 then i got these errors, sio.o(.text+0x18b7): undefined reference to `__guard' sio.o(.text+0x1da9): undefined reference to `__guard' sio.o(.text+0x1db9): undefined reference to `__stack_smash_handler' vga_isa.o: In function `isavga_probe': vga_isa.o(.text+0x10): undefined

hi is there any way to build 4.8 release with this fstack protection? or atleast some ports is there any good info on this? the only page i found was that ibm page but it seemed outdated. //martin

----- Original Message ----- > From: "Eric Christopher" <echristo at gmail.com> > To: "Tim Shen" <timshen at google.com>, llvm-dev at lists.llvm.org, "Hal > Finkel" <hfinkel at anl.gov>, "Kit Barton" <kbarton at ca.ibm.com> > Sent: Wednesday, February 10, 2016 6:59:50 PM > Subject: Re: [llvm-dev] [PPC] Linker fails on

When -fstack-protector is turned on, linker fails to find the symbol "__stack_chk_guard" because at least for powerpc64le, glibc doesn't provide this symbol. Instead, they put the stack guard into TCB. x86 fixed this issue by injecting a special address space (which is later translated to TCB register access) and hard code the offset of stack_guard, but I don't see a easy way to

Hi, List, In checking the page fault problem when using pv-grub to start domU in opensuse12.3[1], found that the problem is caused by ''-fstack-protector'' flag which is introduced in rpm build: export EXTRA_CFLAGS_XEN_TOOLS="$RPM_OPT_FLAGS" export EXTRA_CFLAGS_QEMU_TRADITIONAL="$RPM_OPT_FLAGS" export EXTRA_CFLAGS_QEMU_XEN="$RPM_OPT_FLAGS" with

I'll come up with a address-space-based proof of concept. On Wed, Feb 10, 2016, 17:05 Eric Christopher <echristo at gmail.com> wrote: > On Wed, Feb 10, 2016 at 5:04 PM Hal Finkel <hfinkel at anl.gov> wrote: > >> >> ------------------------------ >> >> *From: *"Eric Christopher" <echristo at gmail.com> >> *To: *"Tim

On 3/13/2013 03:50, Dave Yeo wrote: > On 03/12/13 12:39 pm, Erik de Castro Lopo wrote: >> For the Linux -> Windows cross compile for instance, this detects >> SSP as working, but when I compile it fails with: >> >> CC stream_encoder_framing.lo >> CC window.lo >> CCLD libFLAC.la >> Creating library file:

Hello, I plan to implement "Stack Smashing Protection - Strong" support in LLVM. Below is a description of this feature and an overview of the implementation plan. I have divided up the implementation into stages that can be delivered incrementally. I'm looking for any feedback (suggestions, requests, etc) before I actually begin the work. Thank you! Josh

I found a bit weird to use address space for this, since the offset of getting stack_guard in TCB is, unfortunately, negative: https://github.com/gcc-mirror/gcc/blob/master/gcc/config/rs6000/linux64.h#L610 In my understanding an address space is referring to a segment register (-on powerpc 32bit; or SLB entry on powerpc 64bit?) with a non-negative offset value, so that it's actually accessing

Hi, I created a R library that uses a Fortran module. Everything works like a charm on linux. Now I'm trying to make it work on Windows. I cloned my git repository <https://github.com/ignacio82/MyPi> on a windows computer, and when I press the build and reload button on Rstudio I get these errors: ==> Rcmd.exe INSTALL --no-multiarch --with-keep.source MyPi * installing to library

On 2 Oct 2012, at 03:26, Magee, Josh wrote: > 1) An address of a local variable is taken in such a way as to expose the > address of a stack location. > - Example: the address of a local on the RHS of an assignment, the > address of a local passed into function. This sounds like something that would be triggered for any function containing a block, even if the

David Chisnall wrote: >On 2 Oct 2012, at 03:26, Magee, Josh wrote: > >> 1) An address of a local variable is taken in such a way as to expose the >> address of a stack location. >> - Example: the address of a local on the RHS of an assignment, the >> address of a local passed into function. > > It also sounds like it would be triggered for a

On Mon, Feb 22, 2016 at 3:32 PM Joerg Sonnenberger via llvm-dev < llvm-dev at lists.llvm.org> wrote: > On Mon, Jan 25, 2016 at 07:57:43PM +0000, Tim Shen via llvm-dev wrote: > > A cleaner solution could be adding an IR intrinsic llvm.get_tcb_address() > > and hard code the offset of stack_guard member, since they aren't > supposed > > to change. > > It

On Mon, Feb 22, 2016 at 5:00 PM Eric Christopher <echristo at gmail.com> wrote: > Yeah, for most of the architectures listed there it's not particularly > useful as they support direct access to TLS variables (as Joerg says > later). That grep isn't representative of how the data is actually > accessed. If the current address space way of specifying isn't doable on

Hello, Trying to figure out how to get dovecot to startup at boot. I saw the Ubuntu script on the dovecot site, but that didn't work on my system (SuSe 10.2). Of course, copying the /usr/local/sbin/dovecot file into /etc/init.d doesn't work at all. Any one have working SuSe script?? Rodman

Hi I have a problem now cross-compiling FLAC from latest git. With Ubuntu 12.04 and g++-mingw-w64-i686 (4.6.3-1ubuntu5+5ubuntu1). I think that the problem might have been introduced on 5 Mar 2013 with commit 05609d5 (configure.ac : Add hardening compile options.) Gives errors like this:- /home/user/FLAC_build/flac-05609d5/src/libFLAC/.libs/libFLAC.a(ogg_helper.o):ogg_helper.c:(.text+0x173):

On 10/1/12 9:26 PM, Magee, Josh wrote: > Hello, > > I plan to implement "Stack Smashing Protection - Strong" support in LLVM. > Below is a description of this feature and an overview of the implementation > plan. I have divided up the implementation into stages that can be delivered > incrementally. > > I'm looking for any feedback (suggestions, requests,