| #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 |
| |
| /* FIXME: I don't want to stay hardcoded */ |
| #ifdef CONFIG_X86_64 |
| # define FTRACE_SYSCALL_MAX 296 |
| #else |
| # define FTRACE_SYSCALL_MAX 333 |
| #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 */ |