From: Harish Sadineni <[email protected]> Fixes issue where bpf.get_syscall_fnname() on riscv64 returns bare syscall name instead of the prefixed _riscv_sys variant, causing kprobe attachment failures.
Upstream-Status: Submitted [https://github.com/iovisor/bcc/pull/5490] Signed-off-by: Harish Sadineni <[email protected]> --- ...cv-syscall-prefix-detection-in-C-API.patch | 32 +++++++++++++++++++ .../recipes-devtools/bcc/bcc_0.35.0.bb | 1 + 2 files changed, 33 insertions(+) create mode 100644 meta-oe/dynamic-layers/meta-python/recipes-devtools/bcc/bcc/0002-Add-riscv-syscall-prefix-detection-in-C-API.patch diff --git a/meta-oe/dynamic-layers/meta-python/recipes-devtools/bcc/bcc/0002-Add-riscv-syscall-prefix-detection-in-C-API.patch b/meta-oe/dynamic-layers/meta-python/recipes-devtools/bcc/bcc/0002-Add-riscv-syscall-prefix-detection-in-C-API.patch new file mode 100644 index 0000000000..78bf1df7c3 --- /dev/null +++ b/meta-oe/dynamic-layers/meta-python/recipes-devtools/bcc/bcc/0002-Add-riscv-syscall-prefix-detection-in-C-API.patch @@ -0,0 +1,32 @@ +From da01655f0f335584867b3427005b95384499a020 Mon Sep 17 00:00:00 2001 +From: Harish Sadineni <[email protected]> +Date: Sat, 7 Mar 2026 20:20:04 -0800 +Subject: [PATCH 2/2] Add riscv syscall prefix detection in C++ API + +Fixes issue where bpf.get_syscall_fnname() on riscv64 returns bare syscall +name instead of the prefixed _riscv_sys variant, causing kprobe +attachment failures. + +Upstream-Status: Submitted [https://github.com/iovisor/bcc/pull/5490] + +Signed-off-by: Harish Sadineni <[email protected]> +--- + src/cc/api/BPF.cc | 2 ++ + 1 file changed, 2 insertions(+) + +diff --git a/src/cc/api/BPF.cc b/src/cc/api/BPF.cc +index 11c6c542..e1df8208 100644 +--- a/src/cc/api/BPF.cc ++++ b/src/cc/api/BPF.cc +@@ -782,6 +782,8 @@ std::string BPF::get_syscall_fnname(const std::string& name) { + syscall_prefix_.reset(new std::string("__x64_sys_")); + else if (ksym.resolve_name(nullptr, "__arm64_sys_bpf", &addr)) + syscall_prefix_.reset(new std::string("__arm64_sys_")); ++ else if (ksym.resolve_name(nullptr, "__riscv_sys_bpf", &addr)) ++ syscall_prefix_.reset(new std::string("__riscv_sys_")); + else + syscall_prefix_.reset(new std::string()); + } +-- +2.49.0 + diff --git a/meta-oe/dynamic-layers/meta-python/recipes-devtools/bcc/bcc_0.35.0.bb b/meta-oe/dynamic-layers/meta-python/recipes-devtools/bcc/bcc_0.35.0.bb index 25528e1b10..3a34f04349 100644 --- a/meta-oe/dynamic-layers/meta-python/recipes-devtools/bcc/bcc_0.35.0.bb +++ b/meta-oe/dynamic-layers/meta-python/recipes-devtools/bcc/bcc_0.35.0.bb @@ -23,6 +23,7 @@ SRC_URI = "gitsm://github.com/iovisor/bcc;branch=master;protocol=https;tag=v${PV file://0001-Vendor-just-enough-extra-headers-to-allow-libbpf-to-.patch \ file://0001-Fix-a-build-failure-with-clang21-5369.patch \ file://0001-Add-ARM64-syscall-prefix-detection-in-C-API.patch \ + file://0002-Add-riscv-syscall-prefix-detection-in-C-API.patch \ file://run-ptest \ file://ptest_wrapper.sh \ file://fix_for_memleak.patch \ -- 2.49.0
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