RTEMS: Add Cortex-M33 multilib
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Commit Message
Enable use of Armv8-M instruction set.
Account for CVE-2021-35465 mitigation [PR102035]. The
-mfix-cmse-cve-2021-35465 enabled by default, if -mcpu=cortex-m33 is
used.
gcc/
* config/arm/t-rtems: Add Cortex-M33 multilib.
---
gcc/config/arm/t-rtems | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
Comments
----- Am 4. Feb 2025 um 4:15 schrieb Sebastian Huber sebastian.huber@embedded-brains.de:
> Enable use of Armv8-M instruction set.
>
> Account for CVE-2021-35465 mitigation [PR102035]. The
> -mfix-cmse-cve-2021-35465 enabled by default, if -mcpu=cortex-m33 is
> used.
>
> gcc/
>
> * config/arm/t-rtems: Add Cortex-M33 multilib.
> ---
> gcc/config/arm/t-rtems | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
I would like to back port this change to the GCC 13 and 14 branches.
On 04/02/2025 03:20, Sebastian Huber wrote:
> ----- Am 4. Feb 2025 um 4:15 schrieb Sebastian Huber sebastian.huber@embedded-brains.de:
>
>> Enable use of Armv8-M instruction set.
>>
>> Account for CVE-2021-35465 mitigation [PR102035]. The
>> -mfix-cmse-cve-2021-35465 enabled by default, if -mcpu=cortex-m33 is
>> used.
>>
>> gcc/
>>
>> * config/arm/t-rtems: Add Cortex-M33 multilib.
>> ---
>> gcc/config/arm/t-rtems | 5 +++--
>> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> I would like to back port this change to the GCC 13 and 14 branches.
>
OK.
R.
@@ -17,8 +17,8 @@ MULTILIB_DIRNAMES += eb
MULTILIB_OPTIONS += mthumb
MULTILIB_DIRNAMES += thumb
-MULTILIB_OPTIONS += march=armv5te+fp/march=armv6-m/march=armv7-a/march=armv7-a+simd/march=armv7-r/march=armv7-r+fp/mcpu=cortex-r52/mcpu=cortex-m3/mcpu=cortex-m4/mcpu=cortex-m4+nofp/mcpu=cortex-m7
-MULTILIB_DIRNAMES += armv5te+fp armv6-m armv7-a armv7-a+simd armv7-r armv7-r+fp cortex-r52 cortex-m3 cortex-m4 cortex-m4+nofp cortex-m7
+MULTILIB_OPTIONS += march=armv5te+fp/march=armv6-m/march=armv7-a/march=armv7-a+simd/march=armv7-r/march=armv7-r+fp/mcpu=cortex-r52/mcpu=cortex-m3/mcpu=cortex-m33/mcpu=cortex-m4/mcpu=cortex-m4+nofp/mcpu=cortex-m7
+MULTILIB_DIRNAMES += armv5te+fp armv6-m armv7-a armv7-a+simd armv7-r armv7-r+fp cortex-r52 cortex-m3 cortex-m33 cortex-m4 cortex-m4+nofp cortex-m7
MULTILIB_OPTIONS += mfloat-abi=hard
MULTILIB_DIRNAMES += hard
@@ -33,6 +33,7 @@ MULTILIB_REQUIRED += mthumb/march=armv7-r+fp/mfloat-abi=hard
MULTILIB_REQUIRED += mthumb/march=armv7-r
MULTILIB_REQUIRED += mthumb/mcpu=cortex-r52/mfloat-abi=hard
MULTILIB_REQUIRED += mthumb/mcpu=cortex-m3
+MULTILIB_REQUIRED += mthumb/mcpu=cortex-m33
MULTILIB_REQUIRED += mthumb/mcpu=cortex-m4/mfloat-abi=hard
MULTILIB_REQUIRED += mthumb/mcpu=cortex-m4+nofp
MULTILIB_REQUIRED += mthumb/mcpu=cortex-m7/mfloat-abi=hard