diff options
| author | Simon Marchi <simon.marchi@efficios.com> | 2022-03-16 09:01:36 -0400 |
|---|---|---|
| committer | Simon Marchi <simon.marchi@polymtl.ca> | 2022-03-16 09:01:43 -0400 |
| commit | 2952f10cd79af4645222f124f28c7928287d8113 (patch) | |
| tree | df776596c24ec839cad957eebb14c4bd1b2c3b8c /binutils/config.in | |
| parent | 28cdbb183bf80157a71d222b66abc38f32019f2d (diff) | |
binutils/readelf: build against msgpack, dump NT_AMDGPU_METADATA note contents
The AMDGPU HSA OS ABI (code object v3 and above) defines the
NT_AMDGPU_METADATA ELF note [1]. The content is a msgpack object
describing, among other things, the kernels present in the code object
and how to call them.
I think it would be useful for readelf to be able to display the content
of those notes. msgpack is a structured format, a bit like JSON, except
not text-based. It is therefore possible to dump the contents in
human-readable form without knowledge of the specific layout of the
note.
Add configury to binutils to optionally check for the msgpack C library
[2]. Add There is a new --with{,out}-msgpack configure flag, and the actual
library lookup is done using pkg-config.
If msgpack support is enabled, dumping a NT_AMDGPU_METADATA note looks
like:
$ readelf --notes amdgpu-code-object
Displaying notes found in: .note
Owner Data size Description
AMDGPU 0x0000040d NT_AMDGPU_METADATA (code object metadata)
{
"amdhsa.kernels": [
{
".args": [
{
".address_space": "global",
".name": "out.coerce",
".offset": 0,
".size": 8,
".value_kind": "global_buffer",
},
<snip>
If msgpack support is disabled, dump the contents as hex, as is done
with notes that are not handled in a special way. This allows one to
decode the contents manually (maybe using a command-line msgpack
decoder) if really needed.
[1] https://llvm.org/docs/AMDGPUUsage.html#code-object-metadata
[2] https://github.com/msgpack/msgpack-c/tree/c_master
binutils/ChangeLog:
* Makefile.am (readelf_CFLAGS): New.
(readelf_LDADD): Add MSGPACK_LIBS.
* Makefile.in: Re-generate.
* config.in: Re-generate.
* configure: Re-generate.
* configure.ac: Add --with-msgpack flag and check for msgpack
using pkg-config.
* readelf.c: Include msgpack.h if HAVE_MSGPACK.
(print_note_contents_hex): New.
(print_indents): New.
(dump_msgpack_obj): New.
(dump_msgpack): New.
(print_amdgpu_note): New.
(process_note): Handle NT_AMDGPU_METADATA note contents.
Use print_note_contents_hex.
Change-Id: Ia60a654e620bc32dfdb1bccd845594e2af328b84
Diffstat (limited to 'binutils/config.in')
| -rw-r--r-- | binutils/config.in | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/binutils/config.in b/binutils/config.in index e6fa66fc41..81bd143140 100644 --- a/binutils/config.in +++ b/binutils/config.in @@ -104,6 +104,9 @@ /* Define to 1 if you have a working `mmap' system call. */ #undef HAVE_MMAP +/* Define to 1 if msgpack is available. */ +#undef HAVE_MSGPACK + /* Define to 1 if you have the `sbrk' function. */ #undef HAVE_SBRK |