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270c8cf1ca
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>
78 lines
1.7 KiB
C
78 lines
1.7 KiB
C
#ifndef _ASM_ARM_FTRACE
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#define _ASM_ARM_FTRACE
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#ifdef CONFIG_FUNCTION_TRACER
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#define MCOUNT_ADDR ((unsigned long)(__gnu_mcount_nc))
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#define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */
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#ifndef __ASSEMBLY__
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extern void mcount(void);
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extern void __gnu_mcount_nc(void);
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#ifdef CONFIG_DYNAMIC_FTRACE
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struct dyn_arch_ftrace {
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#ifdef CONFIG_OLD_MCOUNT
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bool old_mcount;
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#endif
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};
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static inline unsigned long ftrace_call_adjust(unsigned long addr)
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{
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/* With Thumb-2, the recorded addresses have the lsb set */
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return addr & ~1;
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}
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extern void ftrace_caller_old(void);
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extern void ftrace_call_old(void);
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#endif
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#endif
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#endif
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#ifndef __ASSEMBLY__
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#if defined(CONFIG_FRAME_POINTER) && !defined(CONFIG_ARM_UNWIND)
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/*
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* return_address uses walk_stackframe to do it's work. If both
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* CONFIG_FRAME_POINTER=y and CONFIG_ARM_UNWIND=y walk_stackframe uses unwind
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* information. For this to work in the function tracer many functions would
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* have to be marked with __notrace. So for now just depend on
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* !CONFIG_ARM_UNWIND.
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*/
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void *return_address(unsigned int);
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#else
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static inline void *return_address(unsigned int level)
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{
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return NULL;
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}
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#endif
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#define ftrace_return_address(n) return_address(n)
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#define ARCH_HAS_SYSCALL_MATCH_SYM_NAME
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static inline bool arch_syscall_match_sym_name(const char *sym,
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const char *name)
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{
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if (!strcmp(sym, "sys_mmap2"))
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sym = "sys_mmap_pgoff";
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else if (!strcmp(sym, "sys_statfs64_wrapper"))
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sym = "sys_statfs64";
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else if (!strcmp(sym, "sys_fstatfs64_wrapper"))
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sym = "sys_fstatfs64";
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else if (!strcmp(sym, "sys_arm_fadvise64_64"))
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sym = "sys_fadvise64_64";
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/* Ignore case since sym may start with "SyS" instead of "sys" */
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return !strcasecmp(sym, name);
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}
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#endif /* ifndef __ASSEMBLY__ */
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#endif /* _ASM_ARM_FTRACE */
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