sorry, please ignore this one. The same patch has been sent out last
night. I may have accidentally deleted it from my inbox and didn't see
it and so sent out again.
On 5/25/21 8:25 AM, Yonghong Song wrote:
LLVM upstream commit https://reviews.llvm.org/D102712
made some changes to bpf relocations to make them
llvm linker lld friendly. The scope of
existing relocations R_BPF_64_{64,32} is narrowed
and new relocations R_BPF_64_{ABS32,ABS64,NODYLD32}
are introduced.
Let us add some documentation about llvm bpf
relocations so people can understand how to resolve
them properly in their respective tools.
Cc: John Fastabend <john.fastabend@xxxxxxxxx>
Cc: Lorenz Bauer <lmb@xxxxxxxxxxxxxx>
Signed-off-by: Yonghong Song <yhs@xxxxxx>
---
Documentation/bpf/index.rst | 1 +
Documentation/bpf/llvm_reloc.rst | 240 +++++++++++++++++++++++++
tools/testing/selftests/bpf/README.rst | 19 ++
3 files changed, 260 insertions(+)
create mode 100644 Documentation/bpf/llvm_reloc.rst
Changelogs:
v1 -> v2:
- add an example to illustrate how relocations related to base
section and symbol table and what is "Implicit Addend"
- clarify why we use 32bit read/write for R_BPF_64_64 (ld_imm64)
relocations.
[...]
