| From foo@baz Wed Aug 9 11:19:16 PDT 2017 |
| From: Rabin Vincent <rabinv@axis.com> |
| Date: Wed, 23 Nov 2016 13:02:32 +0100 |
| Subject: ARM: 8632/1: ftrace: fix syscall name matching |
| |
| From: Rabin Vincent <rabinv@axis.com> |
| |
| |
| [ 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> |
| --- |
| 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 */ |
