Re: PING: PATCH: PR target/46770: Use .init_array/.fini_array sections

["H.J. Lu" <hjl dot tools at gmail dot com>]

On Mon, Mar 21, 2011 at 11:40 AM, H.J. Lu <hjl.tools@gmail.com> wrote:
> On Mon, Mar 14, 2011 at 12:28 PM, H.J. Lu <hjl.tools@gmail.com> wrote:
>> On Thu, Jan 27, 2011 at 2:40 AM, Richard Guenther
>> <richard.guenther@gmail.com> wrote:
>>> On Thu, Jan 27, 2011 at 12:12 AM, H.J. Lu <hongjiu.lu@intel.com> wrote:
>>>> On Tue, Dec 14, 2010 at 05:20:48PM -0800, H.J. Lu wrote:
>>>>> This patch uses .init_array/.fini_array sections instead of
>>>>> .ctors/.dtors sections if mixing .init_array/.fini_array and
>>>>> .ctors/.dtors sections with init_priority works.
>>>>>
>>>>> It removes .ctors/.ctors sections from executables and DSOes, which will
>>>>> remove one function call at startup time from each executable and DSO.
>>>>> It should reduce image size and improve system startup time.
>>>>>
>>>>> If a platform with a working .init_array/.fini_array support needs a
>>>>> different .init_array/.fini_array implementation, it can set
>>>>> use_initfini_array to no.
>>>>>
>>>>> Since .init_array/.fini_array is a target feature. --enable-initfini-array
>>>>> is default to no unless the native run-time test is passed.
>>>>>
>>>>> To pass the native run-time test, a linker with SORT_BY_INIT_PRIORITY
>>>>> support is required. ?The binutils patch is available at
>>>>>
>>>>> http://sourceware.org/ml/binutils/2010-12/msg00466.html
>>>>
>>>> Linker patch has been checked in.
>>>>
>>>>>
>>>>> This patch passed 32bit/64bit regression test on Linux/x86-64. ?Any
>>>>> comments?
>>>>>
>>>>
>>>> This updated patch fixes build on Linux/ia64 and should work on others.
>>>> Any comments?
>>>
>>> Yes. ?This is stage1 material.
>>>
>>
>> Here is the updated patch. ?OK for trunk?
>>
>> Thanks.
>>
>>
>> --
>> H.J.
>> ----
>> 2011-03-14 ?H.J. Lu ?<hongjiu.lu@intel.com>
>>
>> ? ? ? ?PR target/46770
>> ? ? ? ?* acinclude.m4 (gcc_AC_INITFINI_ARRAY): Removed.
>>
>> ? ? ? ?* config.gcc (use_initfini_array): New variable.
>> ? ? ? ?Use initfini-array.o if supported.
>>
>> ? ? ? ?* crtstuff.c: Don't generate .ctors nor .dtors sections if
>> ? ? ? ?NO_CTORS_DTORS_SECTIONS is defined.
>>
>> ? ? ? ?* configure.ac: Remove gcc_AC_INITFINI_ARRAY. ?Add
>> ? ? ? ?--enable-initfini-array and check if .init_array can be used with
>> ? ? ? ?.ctors.
>>
>> ? ? ? ?* configure: Regenerated.
>>
>> ? ? ? ?* config/initfini-array.c: New.
>> ? ? ? ?* config/initfini-array.h: Likewise.
>> ? ? ? ?* config/t-initfini-array: Likewise.
>>
>> ? ? ? ?* config/arm/arm.c (arm_asm_init_sections): Call
>> ? ? ? ?elf_initfini_array_init_sections if NO_CTORS_DTORS_SECTIONS
>> ? ? ? ?is defined.
>> ? ? ? ?* config/avr/avr.c (avr_asm_init_sections): Likewise.
>> ? ? ? ?* config/ia64/ia64.c (ia64_asm_init_sections): Likewise.
>> ? ? ? ?* config/mep/mep.c (mep_asm_init_sections): Likewise.
>> ? ? ? ?* config/microblaze/microblaze.c (microblaze_elf_asm_init_sections):
>> ? ? ? ?Likewise.
>> ? ? ? ?* config/rs6000/rs6000.c (rs6000_elf_asm_init_sections): Likewise.
>> ? ? ? ?* config/stormy16/stormy16.c (xstormy16_asm_init_sections):
>> ? ? ? ?Likewise.
>> ? ? ? ?* config/v850/v850.c (v850_asm_init_sections): Likewise.
>>
>
> PING:
>
> http://gcc.gnu.org/ml/gcc-patches/2011-03/msg00760.html
>

Any comments?  Any objections?

-- 
H.J.