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Change scratch register of tail to t2 when Zicfilp enabled. #93

Merged
merged 1 commit into from
Aug 2, 2024
Merged

Change scratch register of tail to t2 when Zicfilp enabled. #93

merged 1 commit into from
Aug 2, 2024

Commits on Aug 2, 2024

  1. Change scratch register of tail to t2 when Zicfilp enabled. 

    This change is to make `tail` conform with software guarded jump of [Zicfilp].
The reason to not choose `t1` as the label register is that `t1` is also as
`.got.plt` offset of `_dl_runtime_resolve` in [PLT].

[Zicfilp]: https://github.com/riscv/riscv-cfi/blob/main/cfi_forward.adoc
[PLT]: https://github.com/riscv-non-isa/riscv-elf-psabi-doc/blob/master/riscv-elf.adoc#procedure-linkage-table
    Yeting Kuo committed Aug 2, 2024
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