tree a076e9023dd243f3eca302f8619731b01344032f
parent 04f2114ab293570604c7178aaf2e4585b61ae8aa
author Brian Cain <brian.cain@oss.qualcomm.com> 1753029991 -0500
committer GitHub <noreply@github.com> 1753029991 -0500
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[lld] Add thunks for hexagon (#111217)

Without thunks, programs will encounter link errors complaining that the
branch target is out of range. Thunks will extend the range of branch
targets, which is a critical need for large programs. Thunks provide
this flexibility at a cost of some modest code size increase.

When configured with the maximal feature set, the hexagon port of the
linux kernel would often encounter these limitations when linking with
`lld`.

The relocations which will be extended by thunks are:

* R_HEX_B22_PCREL, R_HEX_{G,L}D_PLT_B22_PCREL, R_HEX_PLT_B22_PCREL
relocations have a range of ± 8MiB on the baseline
* R_HEX_B15_PCREL: ±65,532 bytes
* R_HEX_B13_PCREL: ±16,380 bytes
* R_HEX_B9_PCREL: ±1,020 bytes

Fixes #149689 

Co-authored-by: Alexey Karyakin <akaryaki@quicinc.com>

---------

Co-authored-by: Alexey Karyakin <akaryaki@quicinc.com>