On 29.04.2020 17:20, Konstantin Belousov wrote:
> On Wed, Apr 29, 2020 at 02:06:42PM +0000, Michal Meloun wrote:
>> Author: mmel
>> Date: Wed Apr 29 14:06:42 2020
>> New Revision: 360463
>> URL: https://svnweb.freebsd.org/changeset/base/360463
>>
>> Log:
>> Don't allow to use FPU inside of rtld library.
>> Clang10 may use FPU instructions for optimizing operations with
>> memory blocks. But we don't want to do lengthy save/restore of all
>> FPU registers across each rtld_start() call.
>>
>> MFC after: 3 week
>>
>> Modified:
>> head/libexec/rtld-elf/Makefile
>>
>> Modified: head/libexec/rtld-elf/Makefile
>> ==============================================================================
>> --- head/libexec/rtld-elf/Makefile Wed Apr 29 13:45:21 2020
>> (r360462)
>> +++ head/libexec/rtld-elf/Makefile Wed Apr 29 14:06:42 2020
>> (r360463)
>> @@ -48,6 +48,9 @@ MLINKS?= rtld.1 ld-elf.so.1.1 \
>> rtld.1 ld.so.1
>>
>> CFLAGS+= -fpic -DPIC $(DEBUG)
>> +CFLAGS.armv6+= -mfpu=none
>> +CFLAGS.armv7+= -mfpu=none
> I cleaned rtld-elf/Makefile of all MD bits, please move this to
> arm/Makefile.inc.
>
Done in r360469.
arm/Makefile.inc is, of course, much better place for these flags.
Thanks for pointing me me on this.
Michal
>> +
>> LDFLAGS+= -shared -Wl,-Bsymbolic -Wl,-z,defs -nostdlib -e ${RTLD_ENTRY}
>> # Pull in the dependencies that we use from libc
>> .include "rtld-libc/Makefile.inc"
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