From 5febf432df1cfa5b25d99b54c32103fafbdd0eb9 Mon Sep 17 00:00:00 2001 From: Miguel Ojeda Date: Sun, 16 Aug 2026 15:32:33 +0200 Subject: kbuild: rust: keep Rust objects out of Clang LTO with inline helpers Under `CONFIG_LTO_CLANG` + `CONFIG_RUST_INLINE_HELPERS`, one may hit `objtool` errors such as: vmlinux.o: error: objtool: _R..._3Gsp4boot+0xd6a: can't find jump dest instruction at .text._R..._3Gsp4boot+0x1dfd The reason is that in such builds, the Clang invocation that compiles the combined Rust plus helpers bitcode emits LLVM bitcode (again) -- the final code generation happens in the linker's LTO step, which the `-mllvm` trap options passed to Clang do not reach. This, in turn, means that unreachable traps are missing, and the impossible paths do not merely fallthrough to the next symbol, but past the end of their own section, since LTO builds place each function in its own section. Thus filter `CC_FLAGS_LTO` out of the Clang invocation, so that it always emits machine code directly, with the traps in place. Assisted-by: LLM Cc: Gary Guo Cc: Boqun Feng Cc: Alice Ryhl Cc: Matthew Maurer Cc: Josh Poimboeuf Cc: Peter Zijlstra Cc: stable@vger.kernel.org Fixes: 3a2486cc1da5 ("kbuild: rust: provide an option to inline C helpers into Rust") Acked-by: Gary Guo Link: https://patch.msgid.link/20260816133233.197500-2-ojeda@kernel.org Signed-off-by: Miguel Ojeda --- net/mac802154/trace.h | 298 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 298 insertions(+) create mode 100644 net/mac802154/trace.h (limited to 'net/mac802154/trace.h') diff --git a/net/mac802154/trace.h b/net/mac802154/trace.h new file mode 100644 index 000000000..1574ecc48 --- /dev/null +++ b/net/mac802154/trace.h @@ -0,0 +1,298 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Based on net/mac80211/trace.h */ + +#undef TRACE_SYSTEM +#define TRACE_SYSTEM mac802154 + +#if !defined(__MAC802154_DRIVER_TRACE) || defined(TRACE_HEADER_MULTI_READ) +#define __MAC802154_DRIVER_TRACE + +#include + +#include +#include "ieee802154_i.h" + +#define MAXNAME 32 +#define LOCAL_ENTRY __array(char, wpan_phy_name, MAXNAME) +#define LOCAL_ASSIGN strscpy(__entry->wpan_phy_name, \ + wpan_phy_name(local->hw.phy), MAXNAME) +#define LOCAL_PR_FMT "%s" +#define LOCAL_PR_ARG __entry->wpan_phy_name + +#define CCA_ENTRY __field(enum nl802154_cca_modes, cca_mode) \ + __field(enum nl802154_cca_opts, cca_opt) +#define CCA_ASSIGN \ + do { \ + (__entry->cca_mode) = cca->mode; \ + (__entry->cca_opt) = cca->opt; \ + } while (0) +#define CCA_PR_FMT "cca_mode: %d, cca_opt: %d" +#define CCA_PR_ARG __entry->cca_mode, __entry->cca_opt + +#define BOOL_TO_STR(bo) (bo) ? "true" : "false" + +/* Tracing for driver callbacks */ + +DECLARE_EVENT_CLASS(local_only_evt4, + TP_PROTO(struct ieee802154_local *local), + TP_ARGS(local), + TP_STRUCT__entry( + LOCAL_ENTRY + ), + TP_fast_assign( + LOCAL_ASSIGN; + ), + TP_printk(LOCAL_PR_FMT, LOCAL_PR_ARG) +); + +DEFINE_EVENT(local_only_evt4, 802154_drv_return_void, + TP_PROTO(struct ieee802154_local *local), + TP_ARGS(local) +); + +TRACE_EVENT(802154_drv_return_int, + TP_PROTO(struct ieee802154_local *local, int ret), + TP_ARGS(local, ret), + TP_STRUCT__entry( + LOCAL_ENTRY + __field(int, ret) + ), + TP_fast_assign( + LOCAL_ASSIGN; + __entry->ret = ret; + ), + TP_printk(LOCAL_PR_FMT ", returned: %d", LOCAL_PR_ARG, + __entry->ret) +); + +DEFINE_EVENT(local_only_evt4, 802154_drv_start, + TP_PROTO(struct ieee802154_local *local), + TP_ARGS(local) +); + +DEFINE_EVENT(local_only_evt4, 802154_drv_stop, + TP_PROTO(struct ieee802154_local *local), + TP_ARGS(local) +); + +TRACE_EVENT(802154_drv_set_channel, + TP_PROTO(struct ieee802154_local *local, u8 page, u8 channel), + TP_ARGS(local, page, channel), + TP_STRUCT__entry( + LOCAL_ENTRY + __field(u8, page) + __field(u8, channel) + ), + TP_fast_assign( + LOCAL_ASSIGN; + __entry->page = page; + __entry->channel = channel; + ), + TP_printk(LOCAL_PR_FMT ", page: %d, channel: %d", LOCAL_PR_ARG, + __entry->page, __entry->channel) +); + +TRACE_EVENT(802154_drv_set_cca_mode, + TP_PROTO(struct ieee802154_local *local, + const struct wpan_phy_cca *cca), + TP_ARGS(local, cca), + TP_STRUCT__entry( + LOCAL_ENTRY + CCA_ENTRY + ), + TP_fast_assign( + LOCAL_ASSIGN; + CCA_ASSIGN; + ), + TP_printk(LOCAL_PR_FMT ", " CCA_PR_FMT, LOCAL_PR_ARG, + CCA_PR_ARG) +); + +TRACE_EVENT(802154_drv_set_cca_ed_level, + TP_PROTO(struct ieee802154_local *local, s32 mbm), + TP_ARGS(local, mbm), + TP_STRUCT__entry( + LOCAL_ENTRY + __field(s32, mbm) + ), + TP_fast_assign( + LOCAL_ASSIGN; + __entry->mbm = mbm; + ), + TP_printk(LOCAL_PR_FMT ", ed level: %d", LOCAL_PR_ARG, + __entry->mbm) +); + +TRACE_EVENT(802154_drv_set_tx_power, + TP_PROTO(struct ieee802154_local *local, s32 power), + TP_ARGS(local, power), + TP_STRUCT__entry( + LOCAL_ENTRY + __field(s32, power) + ), + TP_fast_assign( + LOCAL_ASSIGN; + __entry->power = power; + ), + TP_printk(LOCAL_PR_FMT ", mbm: %d", LOCAL_PR_ARG, + __entry->power) +); + +TRACE_EVENT(802154_drv_set_lbt_mode, + TP_PROTO(struct ieee802154_local *local, bool mode), + TP_ARGS(local, mode), + TP_STRUCT__entry( + LOCAL_ENTRY + __field(bool, mode) + ), + TP_fast_assign( + LOCAL_ASSIGN; + __entry->mode = mode; + ), + TP_printk(LOCAL_PR_FMT ", lbt mode: %s", LOCAL_PR_ARG, + BOOL_TO_STR(__entry->mode)) +); + +TRACE_EVENT(802154_drv_set_short_addr, + TP_PROTO(struct ieee802154_local *local, __le16 short_addr), + TP_ARGS(local, short_addr), + TP_STRUCT__entry( + LOCAL_ENTRY + __field(__le16, short_addr) + ), + TP_fast_assign( + LOCAL_ASSIGN; + __entry->short_addr = short_addr; + ), + TP_printk(LOCAL_PR_FMT ", short addr: 0x%04x", LOCAL_PR_ARG, + le16_to_cpu(__entry->short_addr)) +); + +TRACE_EVENT(802154_drv_set_pan_id, + TP_PROTO(struct ieee802154_local *local, __le16 pan_id), + TP_ARGS(local, pan_id), + TP_STRUCT__entry( + LOCAL_ENTRY + __field(__le16, pan_id) + ), + TP_fast_assign( + LOCAL_ASSIGN; + __entry->pan_id = pan_id; + ), + TP_printk(LOCAL_PR_FMT ", pan id: 0x%04x", LOCAL_PR_ARG, + le16_to_cpu(__entry->pan_id)) +); + +TRACE_EVENT(802154_drv_set_extended_addr, + TP_PROTO(struct ieee802154_local *local, __le64 extended_addr), + TP_ARGS(local, extended_addr), + TP_STRUCT__entry( + LOCAL_ENTRY + __field(__le64, extended_addr) + ), + TP_fast_assign( + LOCAL_ASSIGN; + __entry->extended_addr = extended_addr; + ), + TP_printk(LOCAL_PR_FMT ", extended addr: 0x%llx", LOCAL_PR_ARG, + le64_to_cpu(__entry->extended_addr)) +); + +TRACE_EVENT(802154_drv_set_pan_coord, + TP_PROTO(struct ieee802154_local *local, bool is_coord), + TP_ARGS(local, is_coord), + TP_STRUCT__entry( + LOCAL_ENTRY + __field(bool, is_coord) + ), + TP_fast_assign( + LOCAL_ASSIGN; + __entry->is_coord = is_coord; + ), + TP_printk(LOCAL_PR_FMT ", is_coord: %s", LOCAL_PR_ARG, + BOOL_TO_STR(__entry->is_coord)) +); + +TRACE_EVENT(802154_drv_set_csma_params, + TP_PROTO(struct ieee802154_local *local, u8 min_be, u8 max_be, + u8 max_csma_backoffs), + TP_ARGS(local, min_be, max_be, max_csma_backoffs), + TP_STRUCT__entry( + LOCAL_ENTRY + __field(u8, min_be) + __field(u8, max_be) + __field(u8, max_csma_backoffs) + ), + TP_fast_assign( + LOCAL_ASSIGN, + __entry->min_be = min_be; + __entry->max_be = max_be; + __entry->max_csma_backoffs = max_csma_backoffs; + ), + TP_printk(LOCAL_PR_FMT ", min be: %d, max be: %d, max csma backoffs: %d", + LOCAL_PR_ARG, __entry->min_be, __entry->max_be, + __entry->max_csma_backoffs) +); + +TRACE_EVENT(802154_drv_set_max_frame_retries, + TP_PROTO(struct ieee802154_local *local, s8 max_frame_retries), + TP_ARGS(local, max_frame_retries), + TP_STRUCT__entry( + LOCAL_ENTRY + __field(s8, max_frame_retries) + ), + TP_fast_assign( + LOCAL_ASSIGN; + __entry->max_frame_retries = max_frame_retries; + ), + TP_printk(LOCAL_PR_FMT ", max frame retries: %d", LOCAL_PR_ARG, + __entry->max_frame_retries) +); + +TRACE_EVENT(802154_drv_set_promiscuous_mode, + TP_PROTO(struct ieee802154_local *local, bool on), + TP_ARGS(local, on), + TP_STRUCT__entry( + LOCAL_ENTRY + __field(bool, on) + ), + TP_fast_assign( + LOCAL_ASSIGN; + __entry->on = on; + ), + TP_printk(LOCAL_PR_FMT ", promiscuous mode: %s", LOCAL_PR_ARG, + BOOL_TO_STR(__entry->on)) +); + +TRACE_EVENT(802154_new_scan_event, + TP_PROTO(struct ieee802154_coord_desc *desc), + TP_ARGS(desc), + TP_STRUCT__entry( + __field(__le16, pan_id) + __field(__le64, addr) + __field(u8, channel) + __field(u8, page) + ), + TP_fast_assign( + __entry->page = desc->page; + __entry->channel = desc->channel; + __entry->pan_id = desc->addr.pan_id; + __entry->addr = desc->addr.extended_addr; + ), + TP_printk("panid: %u, coord_addr: 0x%llx, page: %u, channel: %u", + __le16_to_cpu(__entry->pan_id), __le64_to_cpu(__entry->addr), + __entry->page, __entry->channel) +); + +DEFINE_EVENT(802154_new_scan_event, 802154_scan_event, + TP_PROTO(struct ieee802154_coord_desc *desc), + TP_ARGS(desc) +); + +#endif /* !__MAC802154_DRIVER_TRACE || TRACE_HEADER_MULTI_READ */ + +#undef TRACE_INCLUDE_PATH +#define TRACE_INCLUDE_PATH . +#undef TRACE_INCLUDE_FILE +#define TRACE_INCLUDE_FILE trace +#include -- cgit v1.3.1