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Diffstat (limited to 'arch/x86/include/asm/ftrace.h')
-rw-r--r--arch/x86/include/asm/ftrace.h57
1 files changed, 57 insertions, 0 deletions
diff --git a/arch/x86/include/asm/ftrace.h b/arch/x86/include/asm/ftrace.h
new file mode 100644
index 00000000..268c783a
--- /dev/null
+++ b/arch/x86/include/asm/ftrace.h
@@ -0,0 +1,57 @@
+#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)
+{
+ /*
+ * addr is the address of the mcount call instruction.
+ * recordmcount does the necessary offset calculation.
+ */
+ return addr;
+}
+
+#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 */