From jagadishbb at gmail.com  Mon Dec 29 11:26:06 2008
From: jagadishbb at gmail.com (Jags)
Date: Mon, 29 Dec 2008 16:56:06 +0530
Subject: Question about MIPS-TLS DTP relocations
Message-ID: <7c3ac71c0812290326r4dc7e080ma251b21fb5023222@mail.gmail.com>

Hi All,

With reference to the TLS Support in MIPS, I have one question regarding
MIPS relocations in dynamic linker for static tls objects.

I have my own system libraries, which contains static __thread tls data
types in it.

The readelf of my library shows the following:

readelf -a ./lib/libX.so | grep TLS
  TLS            0x0987a8 0x000a87a8 0x000a87a8 0x00000 0x0000c R   0x4
000adb30  00000026 R_MIPS_TLS_DTPMOD

When I prepare my executable and run it, dynamic linker fails to relocate
the symbols and aborts.

My question is we do not have a relocation type of R_MIPS_TLS_DTPMOD,
instead we have R_MIPS_TLS_DTPMOD32 and R_MIPS_TLS_DTPMOD64.
So my dynamic linker is correct?? Do i need to use -fPIE, instead of -fPIC.

Is my understanding correct. Where could be the problem.

Thanks in advance,
-- 
Jagadish
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From dan at codesourcery.com  Mon Dec 29 16:56:14 2008
From: dan at codesourcery.com (Daniel Jacobowitz)
Date: Mon, 29 Dec 2008 11:56:14 -0500
Subject: [mips-tls] Question about MIPS-TLS DTP relocations
In-Reply-To: <7c3ac71c0812290326r4dc7e080ma251b21fb5023222@mail.gmail.com>
References: <7c3ac71c0812290326r4dc7e080ma251b21fb5023222@mail.gmail.com>
Message-ID: <20081229165614.GC6443@caradoc.them.org>

On Mon, Dec 29, 2008 at 04:56:06PM +0530, Jags wrote:
> When I prepare my executable and run it, dynamic linker fails to relocate
> the symbols and aborts.

Sounds like your dynamic linker does not support TLS.

> My question is we do not have a relocation type of R_MIPS_TLS_DTPMOD,
> instead we have R_MIPS_TLS_DTPMOD32 and R_MIPS_TLS_DTPMOD64.
> So my dynamic linker is correct?? Do i need to use -fPIE, instead of -fPIC.

Try readelf -W (--wide).  It's just cutting off the last few
characters.

-- 
Daniel Jacobowitz
CodeSourcery