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 # define HAVE_FUNCTION_GRAPH_FP_TEST
  10 #endif
  11 #define MCOUNT_INSN_SIZE        5 /* sizeof mcount call */
  12
  13 #ifdef CONFIG_DYNAMIC_FTRACE
  14 #define ARCH_SUPPORTS_FTRACE_OPS 1
  15 #endif
  16
  17 #define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
  18
  19 #ifndef __ASSEMBLY__
  20 extern void mcount(void);
  21 extern atomic_t modifying_ftrace_code;
  22 extern void __fentry__(void);
  23
  24 static inline unsigned long ftrace_call_adjust(unsigned long addr)
  25 {
  26         /*
  27          * addr is the address of the mcount call instruction.
  28          * recordmcount does the necessary offset calculation.
  29          */
  30         return addr;
  31 }
  32
  33 #ifdef CONFIG_DYNAMIC_FTRACE
  34
  35 struct dyn_arch_ftrace {
  36         /* No extra data needed for x86 */
  37 };
  38
  39 int ftrace_int3_handler(struct pt_regs *regs);
  40
  41 #define FTRACE_GRAPH_TRAMP_ADDR FTRACE_GRAPH_ADDR
  42
  43 #endif /*  CONFIG_DYNAMIC_FTRACE */
  44 #endif /* __ASSEMBLY__ */
  45 #endif /* CONFIG_FUNCTION_TRACER */
  46
  47
  48 #if !defined(__ASSEMBLY__) && !defined(COMPILE_OFFSETS)
  49
  50 #if defined(CONFIG_FTRACE_SYSCALLS) && defined(CONFIG_IA32_EMULATION)
  51 #include <asm/compat.h>
  52
  53 /*
  54  * Because ia32 syscalls do not map to x86_64 syscall numbers
  55  * this screws up the trace output when tracing a ia32 task.
  56  * Instead of reporting bogus syscalls, just do not trace them.
  57  *
  58  * If the user really wants these, then they should use the
  59  * raw syscall tracepoints with filtering.
  60  */
  61 #define ARCH_TRACE_IGNORE_COMPAT_SYSCALLS 1
  62 static inline bool arch_trace_is_compat_syscall(struct pt_regs *regs)
  63 {
  64         if (in_compat_syscall())
  65                 return true;
  66         return false;
  67 }
  68 #endif /* CONFIG_FTRACE_SYSCALLS && CONFIG_IA32_EMULATION */
  69 #endif /* !__ASSEMBLY__  && !COMPILE_OFFSETS */
  70
  71 #endif /* _ASM_X86_FTRACE_H */