i386 ABI ??

"Kai Ruottu" (karuottu@freenet.hut.fi)
Thu, 3 Jun 1999 22:53:41 +0000
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Sathish Vasudevaiah <sv@sony.co.in> wrote:
 
> What is the ABI used by the GCC when we specify
> i386-elf as the target ??  

 The i386-elf 'ABI' (calling conventions etc.) follows quite
well the SVR4 ABI. The "SYSTEM V APPLICATION BINARY INTERFACE,
Intel386 Architecture Processor Supplement", Fourth Edition,
available via 'http://www.sco.com/developer/devspecs' as a PDF
document (377 pages) may be useful...

 Typically one must implement the low-level I/O-routines for a
system, the Cygnus newlib docs will tell more about this...

 BTW, a prebuilt egcs-1.1.2 based, Win32-hosted, and i386-elf targeted toolset 
is now available via 'http://www.nettilinja.fi/~ankosken/embtools.htm'. The 
toolset has the support for '-msoft-float' too (for all those 386/486 
microcontrollers without a FPU), implemented with GCC's own routines in 
libgcc.a.

Regards, Kai
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