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authorRabin Vincent <rabinv@axis.com>2016-11-23 13:02:32 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-08-11 09:08:58 -0700
commit5205f5216c6aee6ff6fa947ef7cb0fcb3473d4e3 (patch)
treefc6ee9c06e81eb97dd19c363fa7ef87e8271c068 /arch
parent874f22658c5479a04427103ac5d59ecfb2ba890b (diff)
ARM: 8632/1: ftrace: fix syscall name matching
[ Upstream commit 270c8cf1cacc69cb8d99dea812f06067a45e4609 ] ARM has a few system calls (most notably mmap) for which the names of the functions which are referenced in the syscall table do not match the names of the syscall tracepoints. As a consequence of this, these tracepoints are not made available. Implement arch_syscall_match_sym_name to fix this and allow tracing even these system calls. Signed-off-by: Rabin Vincent <rabinv@axis.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Sasha Levin <alexander.levin@verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/include/asm/ftrace.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/arm/include/asm/ftrace.h b/arch/arm/include/asm/ftrace.h
index bfe2a2f5a644..22b73112b75f 100644
--- a/arch/arm/include/asm/ftrace.h
+++ b/arch/arm/include/asm/ftrace.h
@@ -54,6 +54,24 @@ static inline void *return_address(unsigned int level)
#define ftrace_return_address(n) return_address(n)
+#define ARCH_HAS_SYSCALL_MATCH_SYM_NAME
+
+static inline bool arch_syscall_match_sym_name(const char *sym,
+ const char *name)
+{
+ if (!strcmp(sym, "sys_mmap2"))
+ sym = "sys_mmap_pgoff";
+ else if (!strcmp(sym, "sys_statfs64_wrapper"))
+ sym = "sys_statfs64";
+ else if (!strcmp(sym, "sys_fstatfs64_wrapper"))
+ sym = "sys_fstatfs64";
+ else if (!strcmp(sym, "sys_arm_fadvise64_64"))
+ sym = "sys_fadvise64_64";
+
+ /* Ignore case since sym may start with "SyS" instead of "sys" */
+ return !strcasecmp(sym, name);
+}
+
#endif /* ifndef __ASSEMBLY__ */
#endif /* _ASM_ARM_FTRACE */