diff options
| author | Michael Jeanson <mjeanson@efficios.com> | 2022-12-01 11:14:42 -0500 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-12-02 20:57:09 +1100 |
| commit | ad050d2390fccb22aa3e6f65e11757ce7a5a7ca5 (patch) | |
| tree | 991591f3c759e4aa0c3168fad2e05abdc5ce84d1 | |
| parent | 7cd882df9485988f7d9b3fae04fde4e95a4c7a74 (diff) | |
powerpc/ftrace: fix syscall tracing on PPC64_ELF_ABI_V1
In v5.7 the powerpc syscall entry/exit logic was rewritten in C, on
PPC64_ELF_ABI_V1 this resulted in the symbols in the syscall table
changing from their dot prefixed variant to the non-prefixed ones.
Since ftrace prefixes a dot to the syscall names when matching them to
build its syscall event list, this resulted in no syscall events being
available.
Remove the PPC64_ELF_ABI_V1 specific version of
arch_syscall_match_sym_name to have the same behavior across all powerpc
variants.
Fixes: 68b34588e202 ("powerpc/64/sycall: Implement syscall entry/exit logic in C")
Cc: stable@vger.kernel.org # v5.7+
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221201161442.2127231-1-mjeanson@efficios.com
| -rw-r--r-- | arch/powerpc/include/asm/ftrace.h | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/arch/powerpc/include/asm/ftrace.h b/arch/powerpc/include/asm/ftrace.h index ade406dc6504..441c5f08258b 100644 --- a/arch/powerpc/include/asm/ftrace.h +++ b/arch/powerpc/include/asm/ftrace.h @@ -71,17 +71,6 @@ void ftrace_graph_func(unsigned long ip, unsigned long parent_ip, * those. */ #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME -#ifdef CONFIG_PPC64_ELF_ABI_V1 -static inline bool arch_syscall_match_sym_name(const char *sym, const char *name) -{ - /* We need to skip past the initial dot, and the __se_sys alias */ - return !strcmp(sym + 1, name) || - (!strncmp(sym, ".__se_sys", 9) && !strcmp(sym + 6, name)) || - (!strncmp(sym, ".ppc_", 5) && !strcmp(sym + 5, name + 4)) || - (!strncmp(sym, ".ppc32_", 7) && !strcmp(sym + 7, name + 4)) || - (!strncmp(sym, ".ppc64_", 7) && !strcmp(sym + 7, name + 4)); -} -#else static inline bool arch_syscall_match_sym_name(const char *sym, const char *name) { return !strcmp(sym, name) || @@ -90,7 +79,6 @@ static inline bool arch_syscall_match_sym_name(const char *sym, const char *name (!strncmp(sym, "ppc32_", 6) && !strcmp(sym + 6, name + 4)) || (!strncmp(sym, "ppc64_", 6) && !strcmp(sym + 6, name + 4)); } -#endif /* CONFIG_PPC64_ELF_ABI_V1 */ #endif /* CONFIG_FTRACE_SYSCALLS */ #if defined(CONFIG_PPC64) && defined(CONFIG_FUNCTION_TRACER) |