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 #ifndef __ASSEMBLY__ 50 51 #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME 52 static inline bool arch_syscall_match_sym_name(const char *sym, const char *name) 53 { 54 /* 55 * Compare the symbol name with the system call name. Skip the 56 * "__x64_sys", "__ia32_sys" or simple "sys" prefix. 57 */ 58 return !strcmp(sym + 3, name + 3) || 59 (!strncmp(sym, "__x64_", 6) && !strcmp(sym + 9, name + 3)) || 60 (!strncmp(sym, "__ia32_", 7) && !strcmp(sym + 10, name + 3)); 61 } 62 63 #ifndef COMPILE_OFFSETS 64 65 #if defined(CONFIG_FTRACE_SYSCALLS) && defined(CONFIG_IA32_EMULATION) 66 #include <linux/compat.h> 67 68 /* 69 * Because ia32 syscalls do not map to x86_64 syscall numbers 70 * this screws up the trace output when tracing a ia32 task. 71 * Instead of reporting bogus syscalls, just do not trace them. 72 * 73 * If the user really wants these, then they should use the 74 * raw syscall tracepoints with filtering. 75 */ 76 #define ARCH_TRACE_IGNORE_COMPAT_SYSCALLS 1 77 static inline bool arch_trace_is_compat_syscall(struct pt_regs *regs) 78 { 79 return in_32bit_syscall(); 80 } 81 #endif /* CONFIG_FTRACE_SYSCALLS && CONFIG_IA32_EMULATION */ 82 #endif /* !COMPILE_OFFSETS */ 83 #endif /* !__ASSEMBLY__ */ 84 85 #endif /* _ASM_X86_FTRACE_H */ 86