diff options
Diffstat (limited to 'arch/s390/include/asm/ftrace.h')
| -rw-r--r-- | arch/s390/include/asm/ftrace.h | 47 |
1 files changed, 6 insertions, 41 deletions
diff --git a/arch/s390/include/asm/ftrace.h b/arch/s390/include/asm/ftrace.h index 695c61989f97..e8b460f39c58 100644 --- a/arch/s390/include/asm/ftrace.h +++ b/arch/s390/include/asm/ftrace.h @@ -18,7 +18,7 @@ void ftrace_caller(void); extern char ftrace_graph_caller_end; -extern unsigned long ftrace_plt; +extern void *ftrace_func; struct dyn_arch_ftrace { }; @@ -30,10 +30,11 @@ struct dyn_arch_ftrace { }; struct module; struct dyn_ftrace; -/* - * Either -mhotpatch or -mnop-mcount is used - no explicit init is required - */ -static inline int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec) { return 0; } + +bool ftrace_need_init_nop(void); +#define ftrace_need_init_nop ftrace_need_init_nop + +int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec); #define ftrace_init_nop ftrace_init_nop static inline unsigned long ftrace_call_adjust(unsigned long addr) @@ -41,42 +42,6 @@ static inline unsigned long ftrace_call_adjust(unsigned long addr) return addr; } -struct ftrace_insn { - u16 opc; - s32 disp; -} __packed; - -static inline void ftrace_generate_nop_insn(struct ftrace_insn *insn) -{ -#ifdef CONFIG_FUNCTION_TRACER - /* brcl 0,0 */ - insn->opc = 0xc004; - insn->disp = 0; -#endif -} - -static inline int is_ftrace_nop(struct ftrace_insn *insn) -{ -#ifdef CONFIG_FUNCTION_TRACER - if (insn->disp == 0) - return 1; -#endif - return 0; -} - -static inline void ftrace_generate_call_insn(struct ftrace_insn *insn, - unsigned long ip) -{ -#ifdef CONFIG_FUNCTION_TRACER - unsigned long target; - - /* brasl r0,ftrace_caller */ - target = is_module_addr((void *) ip) ? ftrace_plt : FTRACE_ADDR; - insn->opc = 0xc005; - insn->disp = (target - ip) / 2; -#endif -} - /* * Even though the system call numbers are identical for s390/s390x a * different system call table is used for compat tasks. This may lead |