netdev - [PATCH v2 bpf-next 0/1] libbpf: usdt aarch64 support

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Message-Id: <1649690496-1902-1-git-send-email-alan.maguire@oracle.com>
Date:   Mon, 11 Apr 2022 16:21:35 +0100
From:   Alan Maguire <alan.maguire@...cle.com>
To:     andrii@...nel.org, ast@...nel.org, daniel@...earbox.net
Cc:     iii@...ux.ibm.com, kafai@...com, songliubraving@...com, yhs@...com,
        john.fastabend@...il.com, kpsingh@...nel.org,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        Alan Maguire <alan.maguire@...cle.com>
Subject: [PATCH v2 bpf-next 0/1] libbpf: usdt aarch64 support

USDT support [1] requires architecture-specific handling for translating
from argument strings describing each probe argument to appropriate values
that can be made available to the BPF program.  Determining value size,
whether it refers to a dereference (and if there is an offset from the
register value), a register value or a constant all have to be parsed
slightly differently for different architectures.  Details of format
handling for the aarch64 case are in patch 1.

Changes since v1:

- dropped patch refactoring all arch-specific parsing (Andrii)
- reworked sscanf()s to separate the two register dereference cases,
  made register parsing match [a-z0-9] in all cases (Andrii)

[1] https://lore.kernel.org/bpf/20220404234202.331384-1-andrii@kernel.org/

Alan Maguire (1):
  libbpf: usdt aarch64 arg parsing support

 tools/lib/bpf/usdt.c | 76 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)

-- 
1.8.3.1