diff options
Diffstat (limited to 'arch/x86/include/asm/unwind.h')
| -rw-r--r-- | arch/x86/include/asm/unwind.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/x86/include/asm/unwind.h b/arch/x86/include/asm/unwind.h index 70fc159ebe69..2a1f8734416d 100644 --- a/arch/x86/include/asm/unwind.h +++ b/arch/x86/include/asm/unwind.h @@ -4,6 +4,7 @@ #include <linux/sched.h> #include <linux/ftrace.h> +#include <linux/kprobes.h> #include <asm/ptrace.h> #include <asm/stacktrace.h> @@ -15,6 +16,9 @@ struct unwind_state { unsigned long stack_mask; struct task_struct *task; int graph_idx; +#ifdef CONFIG_KRETPROBES + struct llist_node *kr_cur; +#endif bool error; #if defined(CONFIG_UNWINDER_ORC) bool signal, full_regs; @@ -99,6 +103,31 @@ void unwind_module_init(struct module *mod, void *orc_ip, size_t orc_ip_size, void *orc, size_t orc_size) {} #endif +static inline +unsigned long unwind_recover_kretprobe(struct unwind_state *state, + unsigned long addr, unsigned long *addr_p) +{ +#ifdef CONFIG_KRETPROBES + return is_kretprobe_trampoline(addr) ? + kretprobe_find_ret_addr(state->task, addr_p, &state->kr_cur) : + addr; +#else + return addr; +#endif +} + +/* Recover the return address modified by kretprobe and ftrace_graph. */ +static inline +unsigned long unwind_recover_ret_addr(struct unwind_state *state, + unsigned long addr, unsigned long *addr_p) +{ + unsigned long ret; + + ret = ftrace_graph_ret_addr(state->task, &state->graph_idx, + addr, addr_p); + return unwind_recover_kretprobe(state, ret, addr_p); +} + /* * This disables KASAN checking when reading a value from another task's stack, * since the other task could be running on another CPU and could have poisoned |