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Re: [PATCH] Save reference to kernel provided envp in the linker
On Fri, Dec 21, 2012 at 5:58 AM, Siddhesh Poyarekar <siddhesh@redhat.com> wrote:
> On Fri, Dec 21, 2012 at 05:47:17AM -0800, H.J. Lu wrote:
>> Have you verified that envron isn't passed to functions in
>> .init_array section in libpthread.so?
>>
>
> Ah, it gets environ just fine, but not __environ, which getenv uses.
> Not sure what's happening, but it looks like some relocation quirk.
> I'll look again.
>
> Breakpoint 1, call_init (l=0x7ffff7ff9198, argc=1, argv=0x7fffffffdbd8, env=0x7fffffffdbe8) at dl-init.c:35
> 35 {
> (gdb) p __environ
> $3 = (char **) 0x0
> (gdb) p environ
> $4 = (char **) 0x7fffffffdbe8
> (gdb) p __environ
> $5 = (char **) 0x7fffffffdbe8
>
__environ is set to the same value later.
--
H.J.