From: Lee <ler762@gmail.com>
To: cygwin@cygwin.com
Subject: Re: ASLR revisited
Date: Tue, 03 Mar 2020 06:17:00 -0000 [thread overview]
Message-ID: <CAD8GWsvCymn5Q4ABABMc5akv+YgfQ9NgyPz5THXuPgzWrTredw@mail.gmail.com> (raw)
In-Reply-To: <CAJn6YFBcmnkZ_hGY_OJPguT+m-4UG_2oTCuMCPTD2GVW3JFbDg@mail.gmail.com>
On 3/2/20, John Selbie wrote:
> And I just discovered that recompiling with this added to the g++ command
> line:
>
> -Xlinker --dynamicbase
>
> Seems to work. Or at the least, triggers the process to show up in Process
> Explorer as ASLR?
>
> Good idea to continue with this?
I haven't looked at this in ages, but for gcc I use
LDFLAGS="${LDFLAGS} -Wl,--nxcompat"
# https://en.wikipedia.org/wiki/Data_Execution_Prevention
# Enable DEP with -Wl,--nxcompat
LDFLAGS="${LDFLAGS} -Wl,--dynamicbase,--export-all-symbols"
# https://en.wikipedia.org/wiki/Address_space_layout_randomization
# https://stackoverflow.com/questions/24283918/how-can-i-enable-aslr-dep-and-safeseh-on-an-exe-in-codeblocks-using-mingw
# ASLR with gcc has a problem: -Wl,--dynamicbase doesn't emit the
necessary relocation table.
# As a workaround, you can pass -Wl,--dynamicbase,--export-all-symbols
Regards,
Lee
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next prev parent reply other threads:[~2020-03-03 6:17 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-03 4:26 John Selbie
2020-03-03 4:53 ` John Selbie
2020-03-03 6:17 ` Lee [this message]
2020-03-04 23:29 ` Andrey Repin
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