Jiawei Zhao 4aeae7cc71 libbpf: Fix USDT SIB argument handling causing unrecognized register error ...

[ Upstream commit 758acb9ccf ]

On x86-64, USDT arguments can be specified using Scale-Index-Base (SIB)
addressing, e.g. "1@-96(%rbp,%rax,8)". The current USDT implementation
in libbpf cannot parse this format, causing `bpf_program__attach_usdt()`
to fail with -ENOENT (unrecognized register).

This patch fixes this by implementing the necessary changes:
- add correct handling for SIB-addressed arguments in `bpf_usdt_arg`.
- add adaptive support to `__bpf_usdt_arg_type` and
  `__bpf_usdt_arg_spec` to represent SIB addressing parameters.

Signed-off-by: Jiawei Zhao <phoenix500526@163.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20250827053128.1301287-2-phoenix500526@163.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

2025-11-13 15:34:03 -05:00

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api

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bpf

libbpf: Fix USDT SIB argument handling causing unrecognized register error

2025-11-13 15:34:03 -05:00

perf

libperf event: Ensure tracing data is multiple of 8 sized

2025-10-19 16:33:35 +02:00

subcmd

perf subcmd: avoid crash in exclude_cmds when excludes is empty

2025-10-12 12:57:16 +02:00

symbol

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thermal

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argv_split.c

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bitmap.c

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cmdline.c

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ctype.c

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find_bit.c

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hweight.c

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list_sort.c

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rbtree.c

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slab.c

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str_error_r.c

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string.c

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vsprintf.c

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zalloc.c

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