Re: [Patch ][RFC] [ARM] Remove use of real start of function for ARM EABI configurations.

[Richard Earnshaw <rearnsha at arm dot com>]

On Fri, 2009-03-27 at 14:33 +0000, Ramana Radhakrishnan wrote:
> Hi,
> 
> If you have a bl or a branch from a function in Thumb ISA mode to a local
> function in Thumb ISA mode, gas prints a warning about not being able to
> find the real start of function. 
> 
> This is an artefact of the ".real_start_of" prefix is applied only for
> functions that have the "interfacearm" attribute specified. Since the
> "interfacearm" attribute for functions in C can only be applied by the PE
> configuration of GCC, I'd like to remove support for this from the ELF
> configurations. 
> 
> Tested with the binutils testsuite with no regressions.
> 
> I should point out that the assembler doesn't handle branches or calls to
> local functions defined to be in Thumb ISA from functions written in ARM ISA
> and vice versa that will do the right thing according to the ABI. I am
> working on a follow up patch to handle those cases.
> 
> Ok to commit ?
>  
> 2009-03-27  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
> 
>         * config/tc-arm.c (arm_validate_fix): Define only for OBJ_COFF.
>         (find_real_start): Likewise.
>         * config/tc-arm.h (TC_VALIDATE_FIX): Likewise.

This is OK.

R.