https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99157
--- Comment #3 from Hau Hsu <hsuhau617 at gmail dot com> ---
Here are some more info.
This check determines whether macro __ARM_FEATURE_CMSE is set to 3,
and affects CMSE support for function cmse_check_address_range():
void *
__attribute__ ((warn_unused_result))
cmse_check_address_range (void *p, size_t size, int flags)
{
...
#if __ARM_FEATURE_CMSE & 2
case CMSE_MPU_NONSECURE:
permb = cmse_TTA (pb);
perme = singleCheck ? permb : cmse_TTA (pe);
break;
case CMSE_MPU_UNPRIV | CMSE_MPU_NONSECURE:
permb = cmse_TTAT (pb);
perme = singleCheck ? permb : cmse_TTAT (pe);
break;
#endif
...
}
Since the check always fail, CMSE support for all multilibs are disabled.
The objdump results of v8-m.main libgcc for gcc-arm-none-eabi-7-2018-q2-update
and gcc-arm-none-eabi-10-2020-q4-major are attached.
