1 #ifndef _ASM_X86_FTRACE_H 2 #define _ASM_X86_FTRACE_H 3 4 #ifdef CONFIG_FUNCTION_TRACER 5 #ifdef CC_USING_FENTRY 6 # define MCOUNT_ADDR ((long)(__fentry__)) 7 #else 8 # define MCOUNT_ADDR ((long)(mcount)) 9 #endif 10 #define MCOUNT_INSN_SIZE 5 /* sizeof mcount call */ 11 12 #ifdef CONFIG_DYNAMIC_FTRACE 13 #define ARCH_SUPPORTS_FTRACE_OPS 1 14 #endif 15 16 #ifndef __ASSEMBLY__ 17 extern void mcount(void); 18 extern atomic_t modifying_ftrace_code; 19 extern void __fentry__(void); 20 21 static inline unsigned long ftrace_call_adjust(unsigned long addr) 22 { 23 /* 24 * addr is the address of the mcount call instruction. 25 * recordmcount does the necessary offset calculation. 26 */ 27 return addr; 28 } 29 30 #ifdef CONFIG_DYNAMIC_FTRACE 31 32 struct dyn_arch_ftrace { 33 /* No extra data needed for x86 */ 34 }; 35 36 int ftrace_int3_handler(struct pt_regs *regs); 37 38 #define FTRACE_GRAPH_TRAMP_ADDR FTRACE_GRAPH_ADDR 39 40 #endif /* CONFIG_DYNAMIC_FTRACE */ 41 #endif /* __ASSEMBLY__ */ 42 #endif /* CONFIG_FUNCTION_TRACER */ 43 44 45 #if !defined(__ASSEMBLY__) && !defined(COMPILE_OFFSETS) 46 47 #if defined(CONFIG_FTRACE_SYSCALLS) && defined(CONFIG_IA32_EMULATION) 48 #include <asm/compat.h> 49 50 /* 51 * Because ia32 syscalls do not map to x86_64 syscall numbers 52 * this screws up the trace output when tracing a ia32 task. 53 * Instead of reporting bogus syscalls, just do not trace them. 54 * 55 * If the user realy wants these, then they should use the 56 * raw syscall tracepoints with filtering. 57 */ 58 #define ARCH_TRACE_IGNORE_COMPAT_SYSCALLS 1 59 static inline bool arch_trace_is_compat_syscall(struct pt_regs *regs) 60 { 61 if (is_compat_task()) 62 return true; 63 return false; 64 } 65 #endif /* CONFIG_FTRACE_SYSCALLS && CONFIG_IA32_EMULATION */ 66 #endif /* !__ASSEMBLY__ && !COMPILE_OFFSETS */ 67 68 #endif /* _ASM_X86_FTRACE_H */ 69