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 #ifdef __ASSEMBLY__ 12 13 /* Based off of objdump optput from glibc */ 14 15 #define MCOUNT_SAVE_FRAME \ 16 stwu r1,-48(r1); \ 17 stw r3, 12(r1); \ 18 stw r4, 16(r1); \ 19 stw r5, 20(r1); \ 20 stw r6, 24(r1); \ 21 mflr r3; \ 22 lwz r4, 52(r1); \ 23 mfcr r5; \ 24 stw r7, 28(r1); \ 25 stw r8, 32(r1); \ 26 stw r9, 36(r1); \ 27 stw r10,40(r1); \ 28 stw r3, 44(r1); \ 29 stw r5, 8(r1) 30 31 #define MCOUNT_RESTORE_FRAME \ 32 lwz r6, 8(r1); \ 33 lwz r0, 44(r1); \ 34 lwz r3, 12(r1); \ 35 mtctr r0; \ 36 lwz r4, 16(r1); \ 37 mtcr r6; \ 38 lwz r5, 20(r1); \ 39 lwz r6, 24(r1); \ 40 lwz r0, 52(r1); \ 41 lwz r7, 28(r1); \ 42 lwz r8, 32(r1); \ 43 mtlr r0; \ 44 lwz r9, 36(r1); \ 45 lwz r10,40(r1); \ 46 addi r1, r1, 48 47 48 #else /* !__ASSEMBLY__ */ 49 extern void _mcount(void); 50 51 static inline unsigned long ftrace_call_adjust(unsigned long addr) 52 { 53 /* reloction of mcount call site is the same as the address */ 54 return addr; 55 } 56 57 struct dyn_arch_ftrace { 58 struct module *mod; 59 }; 60 #endif /* __ASSEMBLY__ */ 61 62 #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS 63 #define ARCH_SUPPORTS_FTRACE_OPS 1 64 #endif 65 #endif /* CONFIG_FUNCTION_TRACER */ 66 67 #ifndef __ASSEMBLY__ 68 #if defined(CONFIG_FTRACE_SYSCALLS) && defined(PPC64_ELF_ABI_v1) 69 #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME 70 static inline bool arch_syscall_match_sym_name(const char *sym, const char *name) 71 { 72 /* 73 * Compare the symbol name with the system call name. Skip the .sys or .SyS 74 * prefix from the symbol name and the sys prefix from the system call name and 75 * just match the rest. This is only needed on ppc64 since symbol names on 76 * 32bit do not start with a period so the generic function will work. 77 */ 78 return !strcmp(sym + 4, name + 3); 79 } 80 #endif /* CONFIG_FTRACE_SYSCALLS && PPC64_ELF_ABI_v1 */ 81 82 #ifdef CONFIG_PPC64 83 #include <asm/paca.h> 84 85 static inline void this_cpu_disable_ftrace(void) 86 { 87 get_paca()->ftrace_enabled = 0; 88 } 89 90 static inline void this_cpu_enable_ftrace(void) 91 { 92 get_paca()->ftrace_enabled = 1; 93 } 94 #else /* CONFIG_PPC64 */ 95 static inline void this_cpu_disable_ftrace(void) { } 96 static inline void this_cpu_enable_ftrace(void) { } 97 #endif /* CONFIG_PPC64 */ 98 #endif /* !__ASSEMBLY__ */ 99 100 #endif /* _ASM_POWERPC_FTRACE */ 101