1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_POWERPC_FTRACE
3 #define _ASM_POWERPC_FTRACE
7 #ifdef CONFIG_FUNCTION_TRACER
8 #define MCOUNT_ADDR ((unsigned long)(_mcount))
9 #define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */
13 /* Based off of objdump optput from glibc */
15 #define MCOUNT_SAVE_FRAME \
31 #define MCOUNT_RESTORE_FRAME \
48 #else /* !__ASSEMBLY__ */
49 extern void _mcount(void);
51 static inline unsigned long ftrace_call_adjust(unsigned long addr)
53 /* reloction of mcount call site is the same as the address */
57 struct dyn_arch_ftrace {
60 #endif /* __ASSEMBLY__ */
62 #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS
63 #define ARCH_SUPPORTS_FTRACE_OPS 1
65 #endif /* CONFIG_FUNCTION_TRACER */
68 #ifdef CONFIG_FTRACE_SYSCALLS
70 * Some syscall entry functions on powerpc start with "ppc_" (fork and clone,
71 * for instance) or ppc32_/ppc64_. We should also match the sys_ variant with
74 #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME
75 #ifdef PPC64_ELF_ABI_v1
76 static inline bool arch_syscall_match_sym_name(const char *sym, const char *name)
78 /* We need to skip past the initial dot, and the __se_sys alias */
79 return !strcmp(sym + 1, name) ||
80 (!strncmp(sym, ".__se_sys", 9) && !strcmp(sym + 6, name)) ||
81 (!strncmp(sym, ".ppc_", 5) && !strcmp(sym + 5, name + 4)) ||
82 (!strncmp(sym, ".ppc32_", 7) && !strcmp(sym + 7, name + 4)) ||
83 (!strncmp(sym, ".ppc64_", 7) && !strcmp(sym + 7, name + 4));
86 static inline bool arch_syscall_match_sym_name(const char *sym, const char *name)
88 return !strcmp(sym, name) ||
89 (!strncmp(sym, "__se_sys", 8) && !strcmp(sym + 5, name)) ||
90 (!strncmp(sym, "ppc_", 4) && !strcmp(sym + 4, name + 4)) ||
91 (!strncmp(sym, "ppc32_", 6) && !strcmp(sym + 6, name + 4)) ||
92 (!strncmp(sym, "ppc64_", 6) && !strcmp(sym + 6, name + 4));
94 #endif /* PPC64_ELF_ABI_v1 */
95 #endif /* CONFIG_FTRACE_SYSCALLS */
100 static inline void this_cpu_disable_ftrace(void)
102 get_paca()->ftrace_enabled = 0;
105 static inline void this_cpu_enable_ftrace(void)
107 get_paca()->ftrace_enabled = 1;
109 #else /* CONFIG_PPC64 */
110 static inline void this_cpu_disable_ftrace(void) { }
111 static inline void this_cpu_enable_ftrace(void) { }
112 #endif /* CONFIG_PPC64 */
113 #endif /* !__ASSEMBLY__ */
115 #endif /* _ASM_POWERPC_FTRACE */