labels in inline asm - ReadList.com

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labels in inline asm
\ Clifford Wolf (22 Nov 2007)
. \ David Daney (22 Nov 2007)

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Subject:	labels in inline asm
Group:	Gcc-help
From:	Clifford Wolf
Date:	22 Nov 2007

Hi,

sorry for asking a probably dump question. I'm trying to port SDL_gfx
2.0.16 to ROCK Linux atm and running into a problem wich boils down to the
following test case:

--snip--
inline void foobar()
{
asm volatile(
"jz .foobar_label\n"
".foobar_label:\n"
"nop"
);
}

int main()
{
foobar();
foobar();
return 0;
}
--snap--

when compiled with optimization (inlining enabled) this sure results in an
assembler file with the .foobar_label defined three times:

# gcc -O2 -c demo.c
/tmp/ccx1Ibd9.s: Assembler messages:
/tmp/ccx1Ibd9.s:29: Error: symbol `.foobar_label' is already defined
/tmp/ccx1Ibd9.s:32: Error: symbol `.foobar_label' is already defined

maybe I'm just blind but I cant find anything in the gcc info page which
provides me with a mechanism for dynamically creating label prefixes or
something like that which would help me generating different labels in each
instances of the assembler template...

please help.

yours,
- clifford

--
When your hammer is C++, everything begins to look like a thumb.