Commit Graph

7 Commits

Author SHA1 Message Date
Stafford Horne
0c3c62ca7d or1k: Build Infrastructure
Here we define the minumum linux kernel version at 5.4.0, as that is the
long term support version where 32-bit architectures start to support
64-bit time API's.  The OpenRISC kernel had some bugs up until version 5.8
which caused issues with glibc fork/clone, they have been backported to
5.4 but not previous versions.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2022-01-05 06:40:06 +09:00
Stafford Horne
7d334b1831 or1k: Linux ABI
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2022-01-05 06:40:06 +09:00
Stafford Horne
9a47b9660b or1k: math soft float support
OpenRISC support hard float but I will like to submit that after glibc
soft float goes upstream.  The hard float support depends on adding user
access to the FPCSR, which is not supported by the kernel yet.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2022-01-05 06:40:06 +09:00
Stafford Horne
9f3653b1fa or1k: Atomics and Locking primitives
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2022-01-05 06:40:06 +09:00
Stafford Horne
96882a00ce or1k: Thread Local Storage support
OpenRISC includes 3 TLS addressing models.  Local Dynamic optimizations
are not done in the linker and therefore use the same code sequences as
Global Dynamic.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2022-01-05 06:40:06 +09:00
Stafford Horne
de5c0edc80 or1k: startup and dynamic linking code
Code for C runtime startup and dynamic loading including PLT layout.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2022-01-05 06:40:06 +09:00
Stafford Horne
6e5964311d or1k: ABI Implementation
This code deals with the OpenRISC ABI.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2022-01-05 06:40:05 +09:00