[lld] [LLD][AArch64] Handle R_AARCH64_TLS_DTPREL64 in non-alloc sections (PR #183962)

[Peter Smith via llvm-commits]

smithp35 wrote:

If it helps the original ABI issue https://github.com/ARM-software/abi-aa/issues/176 took inspiration from x86_64 which emits R_X86_64_DTPOFF64 against a DWARF location `DW_AT_location (DW_OP_const8u 0x0, DW_OP_form_tls_address)`

Our GNU community recieved a request for something similar (assembler expression) https://sourceware.org/bugzilla/show_bug.cgi?id=28351 which claims as a pre-requisite for GDB support.

I tried to see if I could examine the location of a TLS variable on an AArch64 in qemu-user mode without DW_AT_location (works on x86), but it seems like qemu user mode doesn't implement enough of the remote protocol. If I get time this evening I'll try on hardware.


https://github.com/llvm/llvm-project/pull/183962