On Mon, Oct 29, 2018 at 2:28 PM Waldek Kozaczuk
wrote:
>
> On Mon, Oct 29, 2018 at 07:23 Nadav Har'El wrote:
>
>> Hi. Looks good. Just one question about the test - why is
>> misc-non-fpic.so a shared object that another
>> test runs, instead of just being an indepedent test of its own,
>>
On Mon, Oct 29, 2018 at 07:23 Nadav Har'El wrote:
> Hi. Looks good. Just one question about the test - why is misc-non-fpic.so
> a shared object that another
> test runs, instead of just being an indepedent test of its own,
> tst-non-fpic.so (that we compile a bit differently
> from the other
Hi. Looks good. Just one question about the test - why is misc-non-fpic.so
a shared object that another
test runs, instead of just being an indepedent test of its own,
tst-non-fpic.so (that we compile a bit differently
from the other tests)?
On Thu, Oct 25, 2018 at 1:10 AM Waldemar Kozaczuk
Nadav,
Does this patch look OK to you to commit?
Thanks,
Waldek
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I know I am hijacking this patch email. But I am glad to report that I was
able to run unmodified /bin/ls on OSv with this patch:
diff --git a/linux.cc b/linux.cc
index d1cd61b7..2bb47f8c 100644
--- a/linux.cc
+++ b/linux.cc
@@ -445,3 +445,8 @@ extern "C" long syscall_wrapper(long number, long
On Sun, Oct 28, 2018 at 10:14 PM Waldek Kozaczuk
wrote:
>
> BTW I have noticed that on my latest Ubuntu 18.10 distribution programs
> like 'ls' and 'grep' seems to be pies as well.
>
> file hello
> hello: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically
> linked, interpreter
I wonder if that is relevant - https://wiki.ubuntu.com/SecurityTeam/PIE.
In my case when I build native-example hello.c like so (notice absence of
-fPIC and -pie):
gcc hello.c -o hello
I automatically get a pie:
file hello
hello: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV),
It is my understanding that this patch enhances OSv only as far as
supporting programs using non-fPIC shared libraries. It in no way affects
or changes how OSv handles loading and execution of executables themselves
(ELF with symbol main).
I guess you are referring to so called non-pie
Good news, can we support NON-fPIC elf executable binary ?
在 2018年10月25日星期四 UTC+8上午6:10:09，Waldek Kozaczuk写道：
>
> This patch enhances ELF dynamic loader to support position
> dependent shared libraries. It does it by detecting presence
> of DT_TEXTREL marker and temporarilily making PT_LOAD
This patch enhances ELF dynamic loader to support position
dependent shared libraries. It does it by detecting presence
of DT_TEXTREL marker and temporarilily making PT_LOAD sections
writable so that corresponding references in code get updated
to point to correct addresses in memory. Eventually
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