arch/loongarch/kernel/unwind.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2022-2023 Loongson Technology Corporation Limited
   4  */
   5 #include <linux/kernel.h>
   6 #include <linux/ftrace.h>
   7
   8 #include <asm/unwind.h>
   9
  10 bool default_next_frame(struct unwind_state *state)
  11 {
  12         struct stack_info *info = &state->stack_info;
  13         unsigned long addr;
  14
  15         if (unwind_done(state))
  16                 return false;
  17
  18         do {
  19                 for (state->sp += sizeof(unsigned long);
  20                      state->sp < info->end; state->sp += sizeof(unsigned long)) {
  21                         addr = *(unsigned long *)(state->sp);
  22                         state->pc = unwind_graph_addr(state, addr, state->sp + 8);
  23                         if (__kernel_text_address(state->pc))
  24                                 return true;
  25                 }
  26
  27                 state->sp = info->next_sp;
  28
  29         } while (!get_stack_info(state->sp, state->task, info));
  30
  31         return false;
  32 }