1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_POWERPC_FTRACE 3 #define _ASM_POWERPC_FTRACE 4 5 #include <asm/types.h> 6 7 #ifdef CONFIG_FUNCTION_TRACER 8 #define MCOUNT_ADDR ((unsigned long)(_mcount)) 9 #define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */ 10 11 /* Ignore unused weak functions which will have larger offsets */ 12 #if defined(CONFIG_MPROFILE_KERNEL) || defined(CONFIG_ARCH_USING_PATCHABLE_FUNCTION_ENTRY) 13 #define FTRACE_MCOUNT_MAX_OFFSET 16 14 #elif defined(CONFIG_PPC32) 15 #define FTRACE_MCOUNT_MAX_OFFSET 8 16 #endif 17 18 #ifndef __ASSEMBLY__ 19 extern void _mcount(void); 20 21 unsigned long prepare_ftrace_return(unsigned long parent, unsigned long ip, 22 unsigned long sp); 23 24 struct module; 25 struct dyn_ftrace; 26 struct dyn_arch_ftrace { 27 struct module *mod; 28 }; 29 30 #ifdef CONFIG_DYNAMIC_FTRACE_WITH_ARGS 31 #define ftrace_need_init_nop() (true) 32 int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec); 33 #define ftrace_init_nop ftrace_init_nop 34 35 struct ftrace_regs { 36 struct pt_regs regs; 37 }; 38 39 static __always_inline struct pt_regs *arch_ftrace_get_regs(struct ftrace_regs *fregs) 40 { 41 /* We clear regs.msr in ftrace_call */ 42 return fregs->regs.msr ? &fregs->regs : NULL; 43 } 44 45 static __always_inline void 46 ftrace_regs_set_instruction_pointer(struct ftrace_regs *fregs, 47 unsigned long ip) 48 { 49 regs_set_return_ip(&fregs->regs, ip); 50 } 51 52 static __always_inline unsigned long 53 ftrace_regs_get_instruction_pointer(struct ftrace_regs *fregs) 54 { 55 return instruction_pointer(&fregs->regs); 56 } 57 58 #define ftrace_regs_get_argument(fregs, n) \ 59 regs_get_kernel_argument(&(fregs)->regs, n) 60 #define ftrace_regs_get_stack_pointer(fregs) \ 61 kernel_stack_pointer(&(fregs)->regs) 62 #define ftrace_regs_return_value(fregs) \ 63 regs_return_value(&(fregs)->regs) 64 #define ftrace_regs_set_return_value(fregs, ret) \ 65 regs_set_return_value(&(fregs)->regs, ret) 66 #define ftrace_override_function_with_return(fregs) \ 67 override_function_with_return(&(fregs)->regs) 68 #define ftrace_regs_query_register_offset(name) \ 69 regs_query_register_offset(name) 70 71 struct ftrace_ops; 72 73 #define ftrace_graph_func ftrace_graph_func 74 void ftrace_graph_func(unsigned long ip, unsigned long parent_ip, 75 struct ftrace_ops *op, struct ftrace_regs *fregs); 76 #endif 77 #endif /* __ASSEMBLY__ */ 78 79 #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS 80 #define ARCH_SUPPORTS_FTRACE_OPS 1 81 #endif 82 #endif /* CONFIG_FUNCTION_TRACER */ 83 84 #ifndef __ASSEMBLY__ 85 #ifdef CONFIG_FTRACE_SYSCALLS 86 /* 87 * Some syscall entry functions on powerpc start with "ppc_" (fork and clone, 88 * for instance) or ppc32_/ppc64_. We should also match the sys_ variant with 89 * those. 90 */ 91 #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME 92 static inline bool arch_syscall_match_sym_name(const char *sym, const char *name) 93 { 94 return !strcmp(sym, name) || 95 (!strncmp(sym, "__se_sys", 8) && !strcmp(sym + 5, name)) || 96 (!strncmp(sym, "ppc_", 4) && !strcmp(sym + 4, name + 4)) || 97 (!strncmp(sym, "ppc32_", 6) && !strcmp(sym + 6, name + 4)) || 98 (!strncmp(sym, "ppc64_", 6) && !strcmp(sym + 6, name + 4)); 99 } 100 #endif /* CONFIG_FTRACE_SYSCALLS */ 101 102 #if defined(CONFIG_PPC64) && defined(CONFIG_FUNCTION_TRACER) 103 #include <asm/paca.h> 104 105 static inline void this_cpu_disable_ftrace(void) 106 { 107 get_paca()->ftrace_enabled = 0; 108 } 109 110 static inline void this_cpu_enable_ftrace(void) 111 { 112 get_paca()->ftrace_enabled = 1; 113 } 114 115 /* Disable ftrace on this CPU if possible (may not be implemented) */ 116 static inline void this_cpu_set_ftrace_enabled(u8 ftrace_enabled) 117 { 118 get_paca()->ftrace_enabled = ftrace_enabled; 119 } 120 121 static inline u8 this_cpu_get_ftrace_enabled(void) 122 { 123 return get_paca()->ftrace_enabled; 124 } 125 #else /* CONFIG_PPC64 */ 126 static inline void this_cpu_disable_ftrace(void) { } 127 static inline void this_cpu_enable_ftrace(void) { } 128 static inline void this_cpu_set_ftrace_enabled(u8 ftrace_enabled) { } 129 static inline u8 this_cpu_get_ftrace_enabled(void) { return 1; } 130 #endif /* CONFIG_PPC64 */ 131 132 #ifdef CONFIG_FUNCTION_TRACER 133 extern unsigned int ftrace_tramp_text[], ftrace_tramp_init[]; 134 void ftrace_free_init_tramp(void); 135 unsigned long ftrace_call_adjust(unsigned long addr); 136 #else 137 static inline void ftrace_free_init_tramp(void) { } 138 static inline unsigned long ftrace_call_adjust(unsigned long addr) { return addr; } 139 #endif 140 #endif /* !__ASSEMBLY__ */ 141 142 #endif /* _ASM_POWERPC_FTRACE */ 143