diff options
Diffstat (limited to 'arch/arm64/include/asm/ftrace.h')
| -rw-r--r-- | arch/arm64/include/asm/ftrace.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/ftrace.h b/arch/arm64/include/asm/ftrace.h index 1c2672bbbf37..b87d70b693c6 100644 --- a/arch/arm64/include/asm/ftrace.h +++ b/arch/arm64/include/asm/ftrace.h @@ -70,10 +70,19 @@ struct ftrace_ops; #define arch_ftrace_get_regs(regs) NULL +/* + * Note: sizeof(struct ftrace_regs) must be a multiple of 16 to ensure correct + * stack alignment + */ struct ftrace_regs { /* x0 - x8 */ unsigned long regs[9]; + +#ifdef CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS + unsigned long direct_tramp; +#else unsigned long __unused; +#endif unsigned long fp; unsigned long lr; @@ -136,6 +145,19 @@ int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec); void ftrace_graph_func(unsigned long ip, unsigned long parent_ip, struct ftrace_ops *op, struct ftrace_regs *fregs); #define ftrace_graph_func ftrace_graph_func + +#ifdef CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS +static inline void arch_ftrace_set_direct_caller(struct ftrace_regs *fregs, + unsigned long addr) +{ + /* + * The ftrace trampoline will return to this address instead of the + * instrumented function. + */ + fregs->direct_tramp = addr; +} +#endif /* CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS */ + #endif #define ftrace_return_address(n) return_address(n) |