1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_X86_FTRACE_H
3 #define _ASM_X86_FTRACE_H
5 #ifdef CONFIG_FUNCTION_TRACER
6 #ifndef CC_USING_FENTRY
7 # error Compiler does not support fentry?
9 # define MCOUNT_ADDR ((unsigned long)(__fentry__))
10 #define MCOUNT_INSN_SIZE 5 /* sizeof mcount call */
12 #ifdef CONFIG_DYNAMIC_FTRACE
13 #define ARCH_SUPPORTS_FTRACE_OPS 1
16 #define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
19 extern void mcount(void);
20 extern atomic_t modifying_ftrace_code;
21 extern void __fentry__(void);
23 static inline unsigned long ftrace_call_adjust(unsigned long addr)
26 * addr is the address of the mcount call instruction.
27 * recordmcount does the necessary offset calculation.
32 #ifdef CONFIG_DYNAMIC_FTRACE
34 struct dyn_arch_ftrace {
35 /* No extra data needed for x86 */
38 int ftrace_int3_handler(struct pt_regs *regs);
40 #define FTRACE_GRAPH_TRAMP_ADDR FTRACE_GRAPH_ADDR
42 #endif /* CONFIG_DYNAMIC_FTRACE */
43 #endif /* __ASSEMBLY__ */
44 #endif /* CONFIG_FUNCTION_TRACER */
49 #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME
50 static inline bool arch_syscall_match_sym_name(const char *sym, const char *name)
53 * Compare the symbol name with the system call name. Skip the
54 * "__x64_sys", "__ia32_sys" or simple "sys" prefix.
56 return !strcmp(sym + 3, name + 3) ||
57 (!strncmp(sym, "__x64_", 6) && !strcmp(sym + 9, name + 3)) ||
58 (!strncmp(sym, "__ia32_", 7) && !strcmp(sym + 10, name + 3));
61 #ifndef COMPILE_OFFSETS
63 #if defined(CONFIG_FTRACE_SYSCALLS) && defined(CONFIG_IA32_EMULATION)
64 #include <linux/compat.h>
67 * Because ia32 syscalls do not map to x86_64 syscall numbers
68 * this screws up the trace output when tracing a ia32 task.
69 * Instead of reporting bogus syscalls, just do not trace them.
71 * If the user really wants these, then they should use the
72 * raw syscall tracepoints with filtering.
74 #define ARCH_TRACE_IGNORE_COMPAT_SYSCALLS 1
75 static inline bool arch_trace_is_compat_syscall(struct pt_regs *regs)
77 return in_32bit_syscall();
79 #endif /* CONFIG_FTRACE_SYSCALLS && CONFIG_IA32_EMULATION */
80 #endif /* !COMPILE_OFFSETS */
81 #endif /* !__ASSEMBLY__ */
83 #endif /* _ASM_X86_FTRACE_H */