smithp35 wrote:
> Just requesting changes so we don't forget about the ABI change.
>
> Might need to coordinate with other toolchains, we can deal with that after
> ABI discussions.
I did a quick check of the support for R_AARCH64_TLS_DTPREL64 in GNU by making
up a fake .debug_info section with .reloc
```
.global foo
.type foo, %tls_object
.section .debug_info, "", %progbits
.xword 0
.reloc 0x0, R_AARCH64_TLS_DTPREL64, foo
```
Looks like there's a small change needed in GNU ld to make this work there
```
aarch64-none-linux-gnu-ld: warning: cannot find entry symbol _start; defaulting
to 00000000004000b0
dtprel.o:(.debug_info+0x0): dangerous relocation: unsupported relocation
```
I think this is just a matter of putting the relocation into the switch
statement as all the other parts seem to be there.
We may want to conditionally add the relocation on aarch64-linux-gnu targets as
if we put it out universally we're going to make clang -g output incompatible
with the system linker for many programs.
https://github.com/llvm/llvm-project/pull/146572
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