1 #ifndef _ASM_POWERPC_FTRACE 2 #define _ASM_POWERPC_FTRACE 3 4 #ifdef CONFIG_FUNCTION_TRACER 5 #define MCOUNT_ADDR ((unsigned long)(_mcount)) 6 #define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */ 7 8 #ifdef __ASSEMBLY__ 9 10 /* Based off of objdump optput from glibc */ 11 12 #define MCOUNT_SAVE_FRAME \ 13 stwu r1,-48(r1); \ 14 stw r3, 12(r1); \ 15 stw r4, 16(r1); \ 16 stw r5, 20(r1); \ 17 stw r6, 24(r1); \ 18 mflr r3; \ 19 lwz r4, 52(r1); \ 20 mfcr r5; \ 21 stw r7, 28(r1); \ 22 stw r8, 32(r1); \ 23 stw r9, 36(r1); \ 24 stw r10,40(r1); \ 25 stw r3, 44(r1); \ 26 stw r5, 8(r1) 27 28 #define MCOUNT_RESTORE_FRAME \ 29 lwz r6, 8(r1); \ 30 lwz r0, 44(r1); \ 31 lwz r3, 12(r1); \ 32 mtctr r0; \ 33 lwz r4, 16(r1); \ 34 mtcr r6; \ 35 lwz r5, 20(r1); \ 36 lwz r6, 24(r1); \ 37 lwz r0, 52(r1); \ 38 lwz r7, 28(r1); \ 39 lwz r8, 32(r1); \ 40 mtlr r0; \ 41 lwz r9, 36(r1); \ 42 lwz r10,40(r1); \ 43 addi r1, r1, 48 44 45 #else /* !__ASSEMBLY__ */ 46 extern void _mcount(void); 47 48 #ifdef CONFIG_DYNAMIC_FTRACE 49 # define FTRACE_ADDR ((unsigned long)ftrace_caller) 50 # define FTRACE_REGS_ADDR FTRACE_ADDR 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 /* CONFIG_DYNAMIC_FTRACE */ 61 #endif /* __ASSEMBLY__ */ 62 63 #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS 64 #define ARCH_SUPPORTS_FTRACE_OPS 1 65 #endif 66 #endif 67 68 #if defined(CONFIG_FTRACE_SYSCALLS) && defined(CONFIG_PPC64) && !defined(__ASSEMBLY__) 69 #if !defined(_CALL_ELF) || _CALL_ELF != 2 70 #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME 71 static inline bool arch_syscall_match_sym_name(const char *sym, const char *name) 72 { 73 /* 74 * Compare the symbol name with the system call name. Skip the .sys or .SyS 75 * prefix from the symbol name and the sys prefix from the system call name and 76 * just match the rest. This is only needed on ppc64 since symbol names on 77 * 32bit do not start with a period so the generic function will work. 78 */ 79 return !strcmp(sym + 4, name + 3); 80 } 81 #endif 82 #endif /* CONFIG_FTRACE_SYSCALLS && CONFIG_PPC64 && !__ASSEMBLY__ */ 83 84 #endif /* _ASM_POWERPC_FTRACE */ 85