[bpf-next,v3,0/2] libbpf: Extend linker API to support in-memory ELF files

Message

Alastair Robertson Dec. 11, 2024, 4:40 p.m. UTC

This gives API consumers the option of using anonymous files/memfds to
avoid writing temporary ELFs to disk, which will be useful for performing
linking as part of bpftrace's JIT compilation.

v3:
- Removed "filename" option. Now always generate our own filename for
  passed-in FDs and buffers.
- Use a common function (bpf_linker_add_file) for shared
  implementation of bpf_linker__add_file, bpf_linker__add_fd and
  bpf_linker__add_buf.

Alastair Robertson (2):
  libbpf: Pull file-opening logic up to top-level functions
  libbpf: Extend linker API to support in-memory ELF files

 tools/lib/bpf/libbpf.h   |   5 +
 tools/lib/bpf/libbpf.map |   4 +
 tools/lib/bpf/linker.c   | 228 ++++++++++++++++++++++++++++++---------
 3 files changed, 184 insertions(+), 53 deletions(-)