bpf, bpftool: Fix incorrect disasm pc

This patch addresses the bpftool issue "Wrong callq address displayed"[0].

The issue stemmed from an incorrect program counter (PC) value used during
disassembly with LLVM or libbfd.

For LLVM: The PC argument must represent the actual address in the kernel
to compute the correct relative address.

For libbfd: The relative address can be adjusted by adding func_ksym within
the custom info->print_address_func to yield the correct address.

Links:
[0] https://github.com/libbpf/bpftool/issues/109

Changes:
v2 -> v3:
  * Address comment from Quentin:
    * Remove the typedef.

v1 -> v2:
  * Fix the broken libbfd disassembler.

Fixes: e1947c750ffe ("bpftool: Refactor disassembler for JIT-ed programs")
Signed-off-by: Leon Hwang <[email protected]>
Signed-off-by: Andrii Nakryiko <[email protected]>
Tested-by: Quentin Monnet <[email protected]>
Reviewed-by: Quentin Monnet <[email protected]>
Acked-by: Yonghong Song <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]

0 files changed, 0 insertions, 0 deletions