diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/sparc/Kconfig | 2 | ||||
| -rw-r--r-- | arch/sparc/include/asm/ftrace.h | 11 | ||||
| -rw-r--r-- | arch/sparc/kernel/ftrace.c | 47 |
3 files changed, 45 insertions, 15 deletions
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index 2185cf9..3f8b6a9 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -37,6 +37,8 @@ config SPARC64 select HAVE_KPROBES select HAVE_LMB select HAVE_SYSCALL_WRAPPERS + select HAVE_DYNAMIC_FTRACE + select HAVE_FTRACE_MCOUNT_RECORD select USE_GENERIC_SMP_HELPERS if SMP select RTC_DRV_CMOS select RTC_DRV_BQ4802 diff --git a/arch/sparc/include/asm/ftrace.h b/arch/sparc/include/asm/ftrace.h index d27716c..b0f18e9 100644 --- a/arch/sparc/include/asm/ftrace.h +++ b/arch/sparc/include/asm/ftrace.h @@ -11,4 +11,15 @@ extern void _mcount(void); #endif +#ifdef CONFIG_DYNAMIC_FTRACE +/* reloction of mcount call site is the same as the address */ +static inline unsigned long ftrace_call_adjust(unsigned long addr) +{ + return addr; +} + +struct dyn_arch_ftrace { +}; +#endif /* CONFIG_DYNAMIC_FTRACE */ + #endif /* _ASM_SPARC64_FTRACE */ diff --git a/arch/sparc/kernel/ftrace.c b/arch/sparc/kernel/ftrace.c index d0218e7..d3b1a30 100644 --- a/arch/sparc/kernel/ftrace.c +++ b/arch/sparc/kernel/ftrace.c @@ -7,14 +7,10 @@ #include <asm/ftrace.h> +#ifdef CONFIG_DYNAMIC_FTRACE static const u32 ftrace_nop = 0x01000000; -unsigned char *ftrace_nop_replace(void) -{ - return (char *)&ftrace_nop; -} - -unsigned char *ftrace_call_replace(unsigned long ip, unsigned long addr) +static u32 ftrace_call_replace(unsigned long ip, unsigned long addr) { static u32 call; s32 off; @@ -22,15 +18,11 @@ unsigned char *ftrace_call_replace(unsigned long ip, unsigned long addr) off = ((s32)addr - (s32)ip); call = 0x40000000 | ((u32)off >> 2); - return (unsigned char *) &call; + return call; } -int -ftrace_modify_code(unsigned long ip, unsigned char *old_code, - unsigned char *new_code) +static int ftrace_modify_code(unsigned long ip, u32 old, u32 new) { - u32 old = *(u32 *)old_code; - u32 new = *(u32 *)new_code; u32 replaced; int faulted; @@ -59,18 +51,43 @@ ftrace_modify_code(unsigned long ip, unsigned char *old_code, return faulted; } +int ftrace_make_nop(struct module *mod, struct dyn_ftrace *rec, unsigned long addr) +{ + unsigned long ip = rec->ip; + u32 old, new; + + old = ftrace_call_replace(ip, addr); + new = ftrace_nop; + return ftrace_modify_code(ip, old, new); +} + +int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr) +{ + unsigned long ip = rec->ip; + u32 old, new; + + old = ftrace_nop; + new = ftrace_call_replace(ip, addr); + return ftrace_modify_code(ip, old, new); +} + int ftrace_update_ftrace_func(ftrace_func_t func) { unsigned long ip = (unsigned long)(&ftrace_call); - unsigned char old[MCOUNT_INSN_SIZE], *new; + u32 old, new; - memcpy(old, &ftrace_call, MCOUNT_INSN_SIZE); + old = *(u32 *) &ftrace_call; new = ftrace_call_replace(ip, (unsigned long)func); return ftrace_modify_code(ip, old, new); } int __init ftrace_dyn_arch_init(void *data) { - ftrace_mcount_set(data); + unsigned long *p = data; + + *p = 0; + return 0; } +#endif + |