about .data.rel.ro

[Khem Raj]

On Tue, Jan 18, 2011 at 6:51 AM, Wang Jiong <wong.kwongyuan at gmail.com> wrote:
> Dear all:
>
> Currently I am upgrading a gcc target from 4.0.3 to 4.3.5
> After test, I have found that gcc 4.3.5 will employee the .data.rel.ro
> section and this has caused trouble when work with uclibc 0.9.31
> 4.3.5 will generate code like
>
>
>
> .type __FUNCTION__.4211, @object
> .size __FUNCTION__.4211, 21
> __FUNCTION__.4211:
> .string "_dl_get_ready_to_run"
> .align 2
>
> .section .data.rel.ro
> .align 2
> .LC108:
> .word __FUNCTION__.4211
> .align 2
>
> t.lw $6,%got_page(.LC108)($28)
> s.addiu $2,$6,%got_ofst(.LC108)
> t.lw $6,0($2) // $6 now contains the value of ".word __FUNCTION__.4211"
> and we wish it will point to the string "_dl_get_ready_to_run", but only
> after it's also updated by ldso to the relocated value, otherwise it
> will be wrong
>
>
> the address of .LC108 and __FUNCTION__.4211 alone will be relocated by
> ldso correctly while LC108's contents will not
>
> My problem is related with .data.rel.ro? and have uclibc 0.9.31
> supportted .data.rel.ro yet?
>

yes uclibc ldso does support RELRO, can you try to reproduce it with git master
and if it still fails care to provide a small testcase

>
> Thanks in advance
>
> Best,
> KwongYuan
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