Re: Draft SH uClinux FDPIC ABI

3 msg	How to rebuild GCC?
2 msg	how to use testsuite to check vectorization cap...
10 msg	Excess registers pushed - regs_ever_live not ri...
2 msg	bootstrap failure on i686
52 msg	birthpoints in rtl.
1 msg	gcc-4.2-20080227 is now available
13 msg	plugin includes for MELT
5 msg	ARM gcc generates incorrect code?
2 msg	Bootstrap failure on powerpc64-linux
13 msg	Re: [PATCH] linux/fs.h - Convert debug function...

Draft SH uClinux FDPIC ABI
\ Joseph S. Myers (27 Feb 2008)
. \ Kaz Kojima (27 Feb 2008)
. . \ Joseph S. Myers (27 Feb 2008)
. \ Alexandre Oliva (28 Feb 2008)
. . \ Joseph S. Myers (29 Feb 2008)
. . . \ Alexandre Oliva (1 Mar 2008)
. \ Joseph S. Myers (25 Mar 2008)

3 msg	decl_constant_value_for_broken_optimization
2 msg	optimizing predictable branches (Was: ... on x86)
1 msg	[tuples] Updated wiki with build instructions
2 msg	A question regarding -fwrapv flag
21 msg	optimizing predictable branches on x86
1 msg	gcc-4.1-20080225 is now available
1 msg	global declarations
7 msg	Bootstrap failure on x86_64
2 msg	When the R.I.P. of 4.1.x branch for?

Subject:	Re: Draft SH uClinux FDPIC ABI
Group:	Gcc
From:	Joseph S. Myers
Date:	29 Feb 2008

On Thu, 28 Feb 2008, Alexandre Oliva wrote:

> It was the need for using the atomic 64-bit load/store instructions
> that motivated us to use 64-bit alignment for function descriptors on
> FR-V. Since SH doesn't have 64-bit load/store instructions, there's
> no need for function descriptors to be aligned to 64-bit boundaries.

I've removed one reference to alignment.

> > This arrangement will not make processes that the debugger attaches to
> > after they are mapped in look like they have independent sets of
> > breakpoints; they may just crash instead of they reach a breakpoint
> > instruction set with ptrace for another process.
>
> Typo (carried over from the original): instead of => instead, if

Thanks - there were lots more typos in the original (spell-checking it
might be a good idea).

> I've just fixed it in FR-V FDPIC 1.0b.

Is there a more recent location to reference than
<http://www.lsd.ic.unicamp.br/~oliva/writeups/FR-V/>, which still seems to
have 1.0a?

--
Joseph S. Myers
joseph