1#ifndef _ASM_X86_FTRACE_H 2#define _ASM_X86_FTRACE_H 3 4#ifdef __ASSEMBLY__ 5 6 .macro MCOUNT_SAVE_FRAME 7 /* taken from glibc */ 8 subq $0x38, %rsp 9 movq %rax, (%rsp) 10 movq %rcx, 8(%rsp) 11 movq %rdx, 16(%rsp) 12 movq %rsi, 24(%rsp) 13 movq %rdi, 32(%rsp) 14 movq %r8, 40(%rsp) 15 movq %r9, 48(%rsp) 16 .endm 17 18 .macro MCOUNT_RESTORE_FRAME 19 movq 48(%rsp), %r9 20 movq 40(%rsp), %r8 21 movq 32(%rsp), %rdi 22 movq 24(%rsp), %rsi 23 movq 16(%rsp), %rdx 24 movq 8(%rsp), %rcx 25 movq (%rsp), %rax 26 addq $0x38, %rsp 27 .endm 28 29#endif 30 31#ifdef CONFIG_FUNCTION_TRACER 32#define MCOUNT_ADDR ((long)(mcount)) 33#define MCOUNT_INSN_SIZE 5 /* sizeof mcount call */ 34 35#ifndef __ASSEMBLY__ 36extern void mcount(void); 37 38static inline unsigned long ftrace_call_adjust(unsigned long addr) 39{ 40 /* 41 * call mcount is "e8 <4 byte offset>" 42 * The addr points to the 4 byte offset and the caller of this 43 * function wants the pointer to e8. Simply subtract one. 44 */ 45 return addr - 1; 46} 47 48#ifdef CONFIG_DYNAMIC_FTRACE 49 50struct dyn_arch_ftrace { 51 /* No extra data needed for x86 */ 52}; 53 54#endif /* CONFIG_DYNAMIC_FTRACE */ 55#endif /* __ASSEMBLY__ */ 56#endif /* CONFIG_FUNCTION_TRACER */ 57 58#endif /* _ASM_X86_FTRACE_H */ 59