src/codegen/x86_64/abi.zig |  41 +++-
 test/c_abi/cfuncs.c        | 240 ++++++++++++++++++++++
 test/c_abi/main.zig        | 350 ++++++++++++++++++++++++++++++++
 3 files changed, 621 insertions(+), 10 deletions(-)