[PATCH 4.9 86/93] ARM: 8632/1: ftrace: fix syscall name matching

[Greg Kroah-Hartman]

4.9-stable review patch.  If anyone has any objections, please let me know.

--

From: Rabin Vincent 


[ 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 
Signed-off-by: Russell King 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman 
---
 arch/arm/include/asm/ftrace.h |   18 ++
 1 file changed, 18 insertions(+)

--- a/arch/arm/include/asm/ftrace.h
+++ b/arch/arm/include/asm/ftrace.h
@@ -54,6 +54,24 @@ static inline void *return_address(unsig
 
 #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 */

[PATCH 4.9 86/93] ARM: 8632/1: ftrace: fix syscall name matching

[Greg Kroah-Hartman]

4.9-stable review patch.  If anyone has any objections, please let me know.

--

From: Rabin Vincent 


[ 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 
Signed-off-by: Russell King 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman 
---
 arch/arm/include/asm/ftrace.h |   18 ++
 1 file changed, 18 insertions(+)

--- a/arch/arm/include/asm/ftrace.h
+++ b/arch/arm/include/asm/ftrace.h
@@ -54,6 +54,24 @@ static inline void *return_address(unsig
 
 #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 */