72dc43a9eb
Handle the different nop and call instructions for Thumb-2. Also, we need to adjust the recorded mcount_loc addresses because they have the lsb set. Cc: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> [recordmcount.pl change] Signed-off-by: Rabin Vincent <rabin@rab.in> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
68 lines
1.6 KiB
C
68 lines
1.6 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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extern 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 HAVE_ARCH_CALLER_ADDR
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#define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))
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#define CALLER_ADDR1 ((unsigned long)return_address(1))
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#define CALLER_ADDR2 ((unsigned long)return_address(2))
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#define CALLER_ADDR3 ((unsigned long)return_address(3))
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#define CALLER_ADDR4 ((unsigned long)return_address(4))
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#define CALLER_ADDR5 ((unsigned long)return_address(5))
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#define CALLER_ADDR6 ((unsigned long)return_address(6))
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#endif /* ifndef __ASSEMBLY__ */
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#endif /* _ASM_ARM_FTRACE */
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