I tested the change and I can at least compile the USDT tests. There's no way to run them though since we do not have a fasttrap implementation for arm64. Do you have any plan to add one? It should be relatively straightforward to support USDT probes. (pid provider is more work.)

If you change the relocation type I'll commit.

In D22360#501797, @markj wrote:

I tested the change and I can at least compile the USDT tests. There's no way to run them though since we do not have a fasttrap implementation for arm64. Do you have any plan to add one? It should be relatively straightforward to support USDT probes. (pid provider is more work.)

If you change the relocation type I'll commit.

Yes, I called PR 'Initial Support' so WE can start
Implement Fasttrap / pid provider.
I haven't worked on it in the past few weeks-
Example test without fasttrap (openjdk):
https://github.com/battleblow/openjdk-jdk11u/issues/62
Well, Oracle has a different approach than in freebsd-source,
For example. they removed dt_isadep.c: https://github.com/oracle/dtrace-utils/commit/41d221d85232d8bd06c91201e63b59a18fc9aff0 etc.

<< If you change the relocation type I'll commit.>>
Do you want (or recommend) it to be changed from absolute to relative :
e.g.

#define	R_AARCH64_PREL64	260
			rel->r_offset = s->dofs_offset +
			    dofr[j].dofr_offset;
			rel->r_info = ELF64_R_INFO(count + dep->de_global,
			    R_AARCH64_PREL64);

or something like that ?

<< Do you have any plan to add one? >>

We/you probably have no choice but to design a plan the next days or weeks :-)

---edit:--
or
#define R_AARCH64_PREL32 261
?

In D22360#501809, @maciphone2_googlemail.com wrote:

In D22360#501797, @markj wrote:

I tested the change and I can at least compile the USDT tests. There's no way to run them though since we do not have a fasttrap implementation for arm64. Do you have any plan to add one? It should be relatively straightforward to support USDT probes. (pid provider is more work.)

If you change the relocation type I'll commit.

Yes, I called PR 'Initial Support' so WE can start
Implement Fasttrap / pid provider.
I haven't worked on it in the past few weeks-
Example test without fasttrap (openjdk):
https://github.com/battleblow/openjdk-jdk11u/issues/62
Well, Oracle has a different approach than in freebsd-source,
For example. they removed dt_isadep.c: https://github.com/oracle/dtrace-utils/commit/41d221d85232d8bd06c91201e63b59a18fc9aff0 etc.

<< If you change the relocation type I'll commit.>>
Do you want (or recommend) it to be changed from absolute to relative :

Yes, it is required for the code to be correct.

e.g.

#define	R_AARCH64_PREL64	260
			rel->r_offset = s->dofs_offset +
			    dofr[j].dofr_offset;
			rel->r_info = ELF64_R_INFO(count + dep->de_global,
			    R_AARCH64_PREL64);

or something like that ?

<< Do you have any plan to add one? >>

We/you probably have no choice but to design a plan the next days or weeks :-)

I do not have much time for that in the near future, but I am happy to answer questions and review code.