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/* * Blackfin ftrace code * * Copyright 2009 Analog Devices Inc. * Licensed under the GPL-2 or later. */ #ifndef __ASM_BFIN_FTRACE_H__ #define __ASM_BFIN_FTRACE_H__ #define MCOUNT_INSN_SIZE 6 /* sizeof "[++sp] = rets; call __mcount;" */ #ifndef __ASSEMBLY__ #ifdef CONFIG_DYNAMIC_FTRACE extern void _mcount(void); #define MCOUNT_ADDR ((unsigned long)_mcount) static inline unsigned long ftrace_call_adjust(unsigned long addr) { return addr; } struct dyn_arch_ftrace { /* No extra data needed for Blackfin */ }; #endif #ifdef CONFIG_FRAME_POINTER #include <linux/mm.h> extern inline void *return_address(unsigned int level) { unsigned long *endstack, *fp, *ret_addr; unsigned int current_level = 0; if (level == 0) return __builtin_return_address(0); fp = (unsigned long *)__builtin_frame_address(0); endstack = (unsigned long *)PAGE_ALIGN((unsigned long)&level); while (((unsigned long)fp & 0x3) == 0 && fp && (fp + 1) < endstack && current_level < level) { fp = (unsigned long *)*fp; current_level++; } if (((unsigned long)fp & 0x3) == 0 && fp && (fp + 1) < endstack) ret_addr = (unsigned long *)*(fp + 1); else ret_addr = NULL; return ret_addr; } #else extern inline void *return_address(unsigned int level) { return NULL; } #endif /* CONFIG_FRAME_POINTER */ #define ftrace_return_address(n) return_address(n) #endif /* __ASSEMBLY__ */ #endif