RTEMS: Add Cortex-M33 multilib

Message ID 20250204031547.29086-1-sebastian.huber@embedded-brains.de
State Committed
Headers
Series RTEMS: Add Cortex-M33 multilib |

Checks

Context Check Description
linaro-tcwg-bot/tcwg_gcc_build--master-aarch64 success Build passed
linaro-tcwg-bot/tcwg_gcc_build--master-arm success Build passed
linaro-tcwg-bot/tcwg_gcc_check--master-aarch64 success Test passed
linaro-tcwg-bot/tcwg_gcc_check--master-arm success Test passed

Commit Message

Sebastian Huber Feb. 4, 2025, 3:15 a.m. UTC
  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

Sebastian Huber Feb. 4, 2025, 3:20 a.m. UTC | #1
----- 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.
  
Richard Earnshaw (lists) Feb. 4, 2025, 12:48 p.m. UTC | #2
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.
  

Patch

diff --git a/gcc/config/arm/t-rtems b/gcc/config/arm/t-rtems
index b2fcf572bca..797640bd4f4 100644
--- a/gcc/config/arm/t-rtems
+++ b/gcc/config/arm/t-rtems
@@ -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