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- #ifndef _ASM_X86_FTRACE_H
- #define _ASM_X86_FTRACE_H
- #ifdef __ASSEMBLY__
- .macro MCOUNT_SAVE_FRAME
- /* taken from glibc */
- subq $0x38, %rsp
- movq %rax, (%rsp)
- movq %rcx, 8(%rsp)
- movq %rdx, 16(%rsp)
- movq %rsi, 24(%rsp)
- movq %rdi, 32(%rsp)
- movq %r8, 40(%rsp)
- movq %r9, 48(%rsp)
- .endm
- .macro MCOUNT_RESTORE_FRAME
- movq 48(%rsp), %r9
- movq 40(%rsp), %r8
- movq 32(%rsp), %rdi
- movq 24(%rsp), %rsi
- movq 16(%rsp), %rdx
- movq 8(%rsp), %rcx
- movq (%rsp), %rax
- addq $0x38, %rsp
- .endm
- #endif
- #ifdef CONFIG_FUNCTION_TRACER
- #define MCOUNT_ADDR ((long)(mcount))
- #define MCOUNT_INSN_SIZE 5 /* sizeof mcount call */
- #ifndef __ASSEMBLY__
- extern void mcount(void);
- static inline unsigned long ftrace_call_adjust(unsigned long addr)
- {
- /*
- * call mcount is "e8 <4 byte offset>"
- * The addr points to the 4 byte offset and the caller of this
- * function wants the pointer to e8. Simply subtract one.
- */
- return addr - 1;
- }
- #ifdef CONFIG_DYNAMIC_FTRACE
- struct dyn_arch_ftrace {
- /* No extra data needed for x86 */
- };
- #endif /* CONFIG_DYNAMIC_FTRACE */
- #endif /* __ASSEMBLY__ */
- #endif /* CONFIG_FUNCTION_TRACER */
- #endif /* _ASM_X86_FTRACE_H */
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