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 /* Ignore unused weak functions which will have non zero offsets */
13 #ifdef CONFIG_HAVE_FENTRY
15 /* Add offset for endbr64 if IBT enabled */
16 # define FTRACE_MCOUNT_MAX_OFFSET ENDBR_INSN_SIZE
19 #ifdef CONFIG_DYNAMIC_FTRACE
20 #define ARCH_SUPPORTS_FTRACE_OPS 1
23 #define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
26 extern atomic_t modifying_ftrace_code;
27 extern void __fentry__(void);
29 static inline unsigned long ftrace_call_adjust(unsigned long addr)
32 * addr is the address of the mcount call instruction.
33 * recordmcount does the necessary offset calculation.
39 * When a ftrace registered caller is tracing a function that is
40 * also set by a register_ftrace_direct() call, it needs to be
41 * differentiated in the ftrace_caller trampoline. To do this, we
42 * place the direct caller in the ORIG_AX part of pt_regs. This
43 * tells the ftrace_caller that there's a direct caller.
45 static inline void arch_ftrace_set_direct_caller(struct pt_regs *regs, unsigned long addr)
51 #ifdef CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS
56 static __always_inline struct pt_regs *
57 arch_ftrace_get_regs(struct ftrace_regs *fregs)
59 /* Only when FL_SAVE_REGS is set, cs will be non zero */
65 #define ftrace_instruction_pointer_set(fregs, _ip) \
66 do { (fregs)->regs.ip = (_ip); } while (0)
69 #define ftrace_graph_func ftrace_graph_func
70 void ftrace_graph_func(unsigned long ip, unsigned long parent_ip,
71 struct ftrace_ops *op, struct ftrace_regs *fregs);
73 #define FTRACE_GRAPH_TRAMP_ADDR FTRACE_GRAPH_ADDR
76 #ifdef CONFIG_DYNAMIC_FTRACE
78 struct dyn_arch_ftrace {
79 /* No extra data needed for x86 */
82 #endif /* CONFIG_DYNAMIC_FTRACE */
83 #endif /* __ASSEMBLY__ */
84 #endif /* CONFIG_FUNCTION_TRACER */
89 #if defined(CONFIG_FUNCTION_TRACER) && defined(CONFIG_DYNAMIC_FTRACE)
90 extern void set_ftrace_ops_ro(void);
92 static inline void set_ftrace_ops_ro(void) { }
95 #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME
96 static inline bool arch_syscall_match_sym_name(const char *sym, const char *name)
99 * Compare the symbol name with the system call name. Skip the
100 * "__x64_sys", "__ia32_sys", "__do_sys" or simple "sys" prefix.
102 return !strcmp(sym + 3, name + 3) ||
103 (!strncmp(sym, "__x64_", 6) && !strcmp(sym + 9, name + 3)) ||
104 (!strncmp(sym, "__ia32_", 7) && !strcmp(sym + 10, name + 3)) ||
105 (!strncmp(sym, "__do_sys", 8) && !strcmp(sym + 8, name + 3));
108 #ifndef COMPILE_OFFSETS
110 #if defined(CONFIG_FTRACE_SYSCALLS) && defined(CONFIG_IA32_EMULATION)
111 #include <linux/compat.h>
114 * Because ia32 syscalls do not map to x86_64 syscall numbers
115 * this screws up the trace output when tracing a ia32 task.
116 * Instead of reporting bogus syscalls, just do not trace them.
118 * If the user really wants these, then they should use the
119 * raw syscall tracepoints with filtering.
121 #define ARCH_TRACE_IGNORE_COMPAT_SYSCALLS 1
122 static inline bool arch_trace_is_compat_syscall(struct pt_regs *regs)
124 return in_32bit_syscall();
126 #endif /* CONFIG_FTRACE_SYSCALLS && CONFIG_IA32_EMULATION */
127 #endif /* !COMPILE_OFFSETS */
128 #endif /* !__ASSEMBLY__ */
130 #endif /* _ASM_X86_FTRACE_H */