arch/x86/include/asm/ftrace.h

   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            ((unsigned long)(__fentry__))
   7 #else
   8 # define MCOUNT_ADDR            ((unsigned 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 really 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 (in_compat_syscall())
  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 */