1 #ifndef _ASM_X86_FTRACE_H 2 #define _ASM_X86_FTRACE_H 3 4 #ifdef __ASSEMBLY__ 5 6 /* skip is set if the stack was already partially adjusted */ 7 .macro MCOUNT_SAVE_FRAME skip=0 8 /* 9 * We add enough stack to save all regs. 10 */ 11 subq $(SS+8-\skip), %rsp 12 movq %rax, RAX(%rsp) 13 movq %rcx, RCX(%rsp) 14 movq %rdx, RDX(%rsp) 15 movq %rsi, RSI(%rsp) 16 movq %rdi, RDI(%rsp) 17 movq %r8, R8(%rsp) 18 movq %r9, R9(%rsp) 19 /* Move RIP to its proper location */ 20 movq SS+8(%rsp), %rdx 21 movq %rdx, RIP(%rsp) 22 .endm 23 24 .macro MCOUNT_RESTORE_FRAME skip=0 25 movq R9(%rsp), %r9 26 movq R8(%rsp), %r8 27 movq RDI(%rsp), %rdi 28 movq RSI(%rsp), %rsi 29 movq RDX(%rsp), %rdx 30 movq RCX(%rsp), %rcx 31 movq RAX(%rsp), %rax 32 addq $(SS+8-\skip), %rsp 33 .endm 34 35 #endif 36 37 #ifdef CONFIG_FUNCTION_TRACER 38 #ifdef CC_USING_FENTRY 39 # define MCOUNT_ADDR ((long)(__fentry__)) 40 #else 41 # define MCOUNT_ADDR ((long)(mcount)) 42 #endif 43 #define MCOUNT_INSN_SIZE 5 /* sizeof mcount call */ 44 45 #ifdef CONFIG_DYNAMIC_FTRACE 46 #define ARCH_SUPPORTS_FTRACE_OPS 1 47 #define ARCH_SUPPORTS_FTRACE_SAVE_REGS 48 #endif 49 50 #ifndef __ASSEMBLY__ 51 extern void mcount(void); 52 extern atomic_t modifying_ftrace_code; 53 extern void __fentry__(void); 54 55 static inline unsigned long ftrace_call_adjust(unsigned long addr) 56 { 57 /* 58 * addr is the address of the mcount call instruction. 59 * recordmcount does the necessary offset calculation. 60 */ 61 return addr; 62 } 63 64 #ifdef CONFIG_DYNAMIC_FTRACE 65 66 struct dyn_arch_ftrace { 67 /* No extra data needed for x86 */ 68 }; 69 70 int ftrace_int3_handler(struct pt_regs *regs); 71 72 #endif /* CONFIG_DYNAMIC_FTRACE */ 73 #endif /* __ASSEMBLY__ */ 74 #endif /* CONFIG_FUNCTION_TRACER */ 75 76 #endif /* _ASM_X86_FTRACE_H */ 77