1 #ifndef _ASM_POWERPC_FTRACE 2 #define _ASM_POWERPC_FTRACE 3 4 #ifdef CONFIG_FUNCTION_TRACER 5 #define MCOUNT_ADDR ((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 static inline unsigned long ftrace_call_adjust(unsigned long addr) 50 { 51 /* reloction of mcount call site is the same as the address */ 52 return addr; 53 } 54 55 struct dyn_arch_ftrace { 56 struct module *mod; 57 }; 58 #endif /* CONFIG_DYNAMIC_FTRACE */ 59 #endif /* __ASSEMBLY__ */ 60 61 #endif 62 63 #if defined(CONFIG_FTRACE_SYSCALLS) && defined(CONFIG_PPC64) && !defined(__ASSEMBLY__) 64 #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME 65 static inline bool arch_syscall_match_sym_name(const char *sym, const char *name) 66 { 67 /* 68 * Compare the symbol name with the system call name. Skip the .sys or .SyS 69 * prefix from the symbol name and the sys prefix from the system call name and 70 * just match the rest. This is only needed on ppc64 since symbol names on 71 * 32bit do not start with a period so the generic function will work. 72 */ 73 return !strcmp(sym + 4, name + 3); 74 } 75 #endif /* CONFIG_FTRACE_SYSCALLS && CONFIG_PPC64 && !__ASSEMBLY__ */ 76 77 #endif /* _ASM_POWERPC_FTRACE */ 78