1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_FTRACE_H 3 #define _ASM_X86_FTRACE_H 4 5 #ifdef CONFIG_FUNCTION_TRACER 6 #ifdef CC_USING_FENTRY 7 # define MCOUNT_ADDR ((unsigned long)(__fentry__)) 8 #else 9 # define MCOUNT_ADDR ((unsigned long)(mcount)) 10 # define HAVE_FUNCTION_GRAPH_FP_TEST 11 #endif 12 #define MCOUNT_INSN_SIZE 5 /* sizeof mcount call */ 13 14 #ifdef CONFIG_DYNAMIC_FTRACE 15 #define ARCH_SUPPORTS_FTRACE_OPS 1 16 #endif 17 18 #define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR 19 20 #ifndef __ASSEMBLY__ 21 extern void mcount(void); 22 extern atomic_t modifying_ftrace_code; 23 extern void __fentry__(void); 24 25 static inline unsigned long ftrace_call_adjust(unsigned long addr) 26 { 27 /* 28 * addr is the address of the mcount call instruction. 29 * recordmcount does the necessary offset calculation. 30 */ 31 return addr; 32 } 33 34 #ifdef CONFIG_DYNAMIC_FTRACE 35 36 struct dyn_arch_ftrace { 37 /* No extra data needed for x86 */ 38 }; 39 40 int ftrace_int3_handler(struct pt_regs *regs); 41 42 #define FTRACE_GRAPH_TRAMP_ADDR FTRACE_GRAPH_ADDR 43 44 #endif /* CONFIG_DYNAMIC_FTRACE */ 45 #endif /* __ASSEMBLY__ */ 46 #endif /* CONFIG_FUNCTION_TRACER */ 47 48 49 #if !defined(__ASSEMBLY__) && !defined(COMPILE_OFFSETS) 50 51 #if defined(CONFIG_FTRACE_SYSCALLS) && defined(CONFIG_IA32_EMULATION) 52 #include <asm/compat.h> 53 54 /* 55 * Because ia32 syscalls do not map to x86_64 syscall numbers 56 * this screws up the trace output when tracing a ia32 task. 57 * Instead of reporting bogus syscalls, just do not trace them. 58 * 59 * If the user really wants these, then they should use the 60 * raw syscall tracepoints with filtering. 61 */ 62 #define ARCH_TRACE_IGNORE_COMPAT_SYSCALLS 1 63 static inline bool arch_trace_is_compat_syscall(struct pt_regs *regs) 64 { 65 if (in_compat_syscall()) 66 return true; 67 return false; 68 } 69 #endif /* CONFIG_FTRACE_SYSCALLS && CONFIG_IA32_EMULATION */ 70 #endif /* !__ASSEMBLY__ && !COMPILE_OFFSETS */ 71 72 #endif /* _ASM_X86_FTRACE_H */ 73