LXR linux/arch/powerpc/include/asm/ftrace.h

   1#ifndef _ASM_POWERPC_FTRACE
   2#define _ASM_POWERPC_FTRACE
   3
   4#ifdef CONFIG_FUNCTION_TRACER
   5#define MCOUNT_ADDR             ((long)(_mcount))
   6#define MCOUNT_INSN_SIZE        4 /* sizeof mcount call */
   7
   8#ifdef __ASSEMBLY__
   9
  10/* Based off of objdump optput from glibc */
  11
  12#define MCOUNT_SAVE_FRAME                       \
  13        stwu    r1,-48(r1);                     \
  14        stw     r3, 12(r1);                     \
  15        stw     r4, 16(r1);                     \
  16        stw     r5, 20(r1);                     \
  17        stw     r6, 24(r1);                     \
  18        mflr    r3;                             \
  19        lwz     r4, 52(r1);                     \
  20        mfcr    r5;                             \
  21        stw     r7, 28(r1);                     \
  22        stw     r8, 32(r1);                     \
  23        stw     r9, 36(r1);                     \
  24        stw     r10,40(r1);                     \
  25        stw     r3, 44(r1);                     \
  26        stw     r5, 8(r1)
  27
  28#define MCOUNT_RESTORE_FRAME                    \
  29        lwz     r6, 8(r1);                      \
  30        lwz     r0, 44(r1);                     \
  31        lwz     r3, 12(r1);                     \
  32        mtctr   r0;                             \
  33        lwz     r4, 16(r1);                     \
  34        mtcr    r6;                             \
  35        lwz     r5, 20(r1);                     \
  36        lwz     r6, 24(r1);                     \
  37        lwz     r0, 52(r1);                     \
  38        lwz     r7, 28(r1);                     \
  39        lwz     r8, 32(r1);                     \
  40        mtlr    r0;                             \
  41        lwz     r9, 36(r1);                     \
  42        lwz     r10,40(r1);                     \
  43        addi    r1, r1, 48
  44
  45#else /* !__ASSEMBLY__ */
  46extern void _mcount(void);
  47
  48#ifdef CONFIG_DYNAMIC_FTRACE
  49static inline unsigned long ftrace_call_adjust(unsigned long addr)
  50{
  51       /* reloction of mcount call site is the same as the address */
  52       return addr;
  53}
  54
  55struct dyn_arch_ftrace {
  56        struct module *mod;
  57};
  58#endif /*  CONFIG_DYNAMIC_FTRACE */
  59#endif /* __ASSEMBLY__ */
  60
  61#endif
  62
  63#endif /* _ASM_POWERPC_FTRACE */
  64