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 #ifdef CONFIG_DYNAMIC_FTRACE 52 # define FTRACE_ADDR ((unsigned long)ftrace_caller) 53 # define FTRACE_REGS_ADDR FTRACE_ADDR 54 static inline unsigned long ftrace_call_adjust(unsigned long addr) 55 { 56 /* reloction of mcount call site is the same as the address */ 57 return addr; 58 } 59 60 struct dyn_arch_ftrace { 61 struct module *mod; 62 }; 63 #endif /* CONFIG_DYNAMIC_FTRACE */ 64 #endif /* __ASSEMBLY__ */ 65 66 #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS 67 #define ARCH_SUPPORTS_FTRACE_OPS 1 68 #endif 69 #endif 70 71 #if defined(CONFIG_FTRACE_SYSCALLS) && !defined(__ASSEMBLY__) 72 /* 73 * Some syscall entry functions on powerpc start with "ppc_" (fork and clone, 74 * for instance) or ppc32_/ppc64_. We should also match the sys_ variant with 75 * those. 76 */ 77 #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME 78 #ifdef PPC64_ELF_ABI_v1 79 static inline bool arch_syscall_match_sym_name(const char *sym, const char *name) 80 { 81 /* We need to skip past the initial dot, and the __se_sys alias */ 82 return !strcmp(sym + 1, name) || 83 (!strncmp(sym, ".__se_sys", 9) && !strcmp(sym + 6, name)) || 84 (!strncmp(sym, ".ppc_", 5) && !strcmp(sym + 5, name + 4)) || 85 (!strncmp(sym, ".ppc32_", 7) && !strcmp(sym + 7, name + 4)) || 86 (!strncmp(sym, ".ppc64_", 7) && !strcmp(sym + 7, name + 4)); 87 } 88 #else 89 static inline bool arch_syscall_match_sym_name(const char *sym, const char *name) 90 { 91 return !strcmp(sym, name) || 92 (!strncmp(sym, "__se_sys", 8) && !strcmp(sym + 5, name)) || 93 (!strncmp(sym, "ppc_", 4) && !strcmp(sym + 4, name + 4)) || 94 (!strncmp(sym, "ppc32_", 6) && !strcmp(sym + 6, name + 4)) || 95 (!strncmp(sym, "ppc64_", 6) && !strcmp(sym + 6, name + 4)); 96 } 97 #endif 98 #endif /* CONFIG_FTRACE_SYSCALLS && !__ASSEMBLY__ */ 99 100 #endif /* _ASM_POWERPC_FTRACE */ 101