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   1 #ifndef __ASM_SH_FTRACE_H
   2 #define __ASM_SH_FTRACE_H
   3
   4 #ifdef CONFIG_FUNCTION_TRACER
   5
   6 #define MCOUNT_INSN_SIZE        4 /* sizeof mcount call */
   7 #define FTRACE_SYSCALL_MAX      NR_syscalls
   8
   9 #ifndef __ASSEMBLY__
  10 extern void mcount(void);
  11
  12 #define MCOUNT_ADDR             ((long)(mcount))
  13
  14 #ifdef CONFIG_DYNAMIC_FTRACE
  15 #define CALL_ADDR               ((long)(ftrace_call))
  16 #define STUB_ADDR               ((long)(ftrace_stub))
  17 #define GRAPH_ADDR              ((long)(ftrace_graph_call))
  18 #define CALLER_ADDR             ((long)(ftrace_caller))
  19
  20 #define MCOUNT_INSN_OFFSET      ((STUB_ADDR - CALL_ADDR) - 4)
  21 #define GRAPH_INSN_OFFSET       ((CALLER_ADDR - GRAPH_ADDR) - 4)
  22
  23 struct dyn_arch_ftrace {
  24         /* No extra data needed on sh */
  25 };
  26
  27 #endif /* CONFIG_DYNAMIC_FTRACE */
  28
  29 static inline unsigned long ftrace_call_adjust(unsigned long addr)
  30 {
  31         /* 'addr' is the memory table address. */
  32         return addr;
  33 }
  34
  35
  36 #ifdef CONFIG_DWARF_UNWINDER
  37 #include <asm/dwarf.h>
  38
  39 #define HAVE_ARCH_CALLER_ADDR
  40
  41 static inline unsigned long dwarf_return_address(int depth)
  42 {
  43         struct dwarf_frame *frame;
  44         unsigned long ra;
  45         int i;
  46
  47         for (i = 0, frame = NULL, ra = 0; i <= depth; i++) {
  48                 struct dwarf_frame *tmp;
  49
  50                 tmp = dwarf_unwind_stack(ra, frame);
  51
  52                 if (frame)
  53                         dwarf_free_frame(frame);
  54
  55                 frame = tmp;
  56
  57                 if (!frame || !frame->return_addr)
  58                         break;
  59
  60                 ra = frame->return_addr;
  61         }
  62
  63         /* Failed to unwind the stack to the specified depth. */
  64         WARN_ON(i != depth + 1);
  65
  66         if (frame)
  67                 dwarf_free_frame(frame);
  68
  69         return ra;
  70 }
  71
  72 #define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))
  73 #define CALLER_ADDR1 dwarf_return_address(1)
  74 #define CALLER_ADDR2 dwarf_return_address(2)
  75 #define CALLER_ADDR3 dwarf_return_address(3)
  76 #define CALLER_ADDR4 dwarf_return_address(4)
  77 #define CALLER_ADDR5 dwarf_return_address(5)
  78 #define CALLER_ADDR6 dwarf_return_address(6)
  79
  80 #endif /* CONFIG_DWARF_UNWINDER */
  81
  82 #endif /* __ASSEMBLY__ */
  83 #endif /* CONFIG_FUNCTION_TRACER */
  84
  85 #endif /* __ASM_SH_FTRACE_H */