diff options
Diffstat (limited to 'linux/arch/x86/include/asm/ftrace.h')
-rw-r--r-- | linux/arch/x86/include/asm/ftrace.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/linux/arch/x86/include/asm/ftrace.h b/linux/arch/x86/include/asm/ftrace.h new file mode 100644 index 00000000..f45acad3 --- /dev/null +++ b/linux/arch/x86/include/asm/ftrace.h @@ -0,0 +1,68 @@ +#ifndef _ASM_X86_FTRACE_H +#define _ASM_X86_FTRACE_H + +#ifdef CONFIG_FUNCTION_TRACER +#ifdef CC_USING_FENTRY +# define MCOUNT_ADDR ((long)(__fentry__)) +#else +# define MCOUNT_ADDR ((long)(mcount)) +#endif +#define MCOUNT_INSN_SIZE 5 /* sizeof mcount call */ + +#ifdef CONFIG_DYNAMIC_FTRACE +#define ARCH_SUPPORTS_FTRACE_OPS 1 +#endif + +#ifndef __ASSEMBLY__ +extern void mcount(void); +extern atomic_t modifying_ftrace_code; +extern void __fentry__(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 */ +}; + +int ftrace_int3_handler(struct pt_regs *regs); + +#define FTRACE_GRAPH_TRAMP_ADDR FTRACE_GRAPH_ADDR + +#endif /* CONFIG_DYNAMIC_FTRACE */ +#endif /* __ASSEMBLY__ */ +#endif /* CONFIG_FUNCTION_TRACER */ + + +#if !defined(__ASSEMBLY__) && !defined(COMPILE_OFFSETS) + +#if defined(CONFIG_FTRACE_SYSCALLS) && defined(CONFIG_IA32_EMULATION) +#include <asm/compat.h> + +/* + * Because ia32 syscalls do not map to x86_64 syscall numbers + * this screws up the trace output when tracing a ia32 task. + * Instead of reporting bogus syscalls, just do not trace them. + * + * If the user realy wants these, then they should use the + * raw syscall tracepoints with filtering. + */ +#define ARCH_TRACE_IGNORE_COMPAT_SYSCALLS 1 +static inline bool arch_trace_is_compat_syscall(struct pt_regs *regs) +{ + if (is_compat_task()) + return true; + return false; +} +#endif /* CONFIG_FTRACE_SYSCALLS && CONFIG_IA32_EMULATION */ +#endif /* !__ASSEMBLY__ && !COMPILE_OFFSETS */ + +#endif /* _ASM_X86_FTRACE_H */ |