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Re: A typo in elfNN_ia64_choose_gp?
- From: "H. J. Lu" <hjl at lucon dot org>
- To: Richard Henderson <rth at redhat dot com>
- Cc: binutils at sources dot redhat dot com
- Date: Mon, 8 Sep 2003 17:37:21 -0700
- Subject: Re: A typo in elfNN_ia64_choose_gp?
- References: <20030908235243.GA31717@lucon.org>
On Mon, Sep 08, 2003 at 04:52:43PM -0700, H. J. Lu wrote:
> Hi Richard,
>
> elfNN_ia64_choose_gp tries to pick a good gp. But it also counts
> the text sections when it computes min_vma and max_vma. Since there
> is a huge gap between the text segment and the data segments on
> Linux, the linker always picks the address of GOT as gp. On Linux,
> GOT is the lowest address of small data:
>
>
> [25] .got PROGBITS 60000000003ebdb8 004dbdb8
> 0000000000002430 0000000000000000 WAp 0 0 8
> [26] .IA_64.pltoff PROGBITS 60000000003ee1f0 004de1f0
> 0000000000000400 0000000000000000 WAp 0 0 16
> [27] .sdata PROGBITS 60000000003ee5f0 004de5f0
> 00000000000016c0 0000000000000000 WAp 0 0 16
> [28] .srdata PROGBITS 60000000003efcb0 004dfcb0
> 0000000000000120 0000000000000000 Ap 0 0 16
> [29] .sdata1 PROGBITS 60000000003efdd0 004dfdd0
> 00000000000013d0 0000000000000000 WAp 0 0 16
> [30] .srodata PROGBITS 60000000003f11a0 004e11a0
> 0000000000000000 0000000000000000 Ap 0 0 16
> [31] .sbss NOBITS 60000000003f11a0 004e11a0
> 0000000000000ac0 0000000000000000 WAp 0 0 16
>
> As the result, we can't support as much short data as we should. Do
> we have to count text sections for min_vma and max_vma? I'd like to
> change them to min_data_vma and max_data_vma, and use them to pick
> a better gp.
>
Never mind. The readonly data will be in the text segment.
H.J.