diff options
Diffstat (limited to 'arch/loongarch/include')
| -rw-r--r-- | arch/loongarch/include/asm/unwind.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/unwind.h b/arch/loongarch/include/asm/unwind.h index 834ba6bd15d2..36584b95ef8b 100644 --- a/arch/loongarch/include/asm/unwind.h +++ b/arch/loongarch/include/asm/unwind.h @@ -27,6 +27,8 @@ struct unwind_state { unsigned long sp, pc, ra; }; +bool default_next_frame(struct unwind_state *state); + void unwind_start(struct unwind_state *state, struct task_struct *task, struct pt_regs *regs); bool unwind_next_frame(struct unwind_state *state); @@ -50,4 +52,31 @@ static inline unsigned long unwind_graph_addr(struct unwind_state *state, return ftrace_graph_ret_addr(state->task, &state->graph_idx, pc, (unsigned long *)(cfa - GRAPH_FAKE_OFFSET)); } + +static __always_inline void __unwind_start(struct unwind_state *state, + struct task_struct *task, struct pt_regs *regs) +{ + memset(state, 0, sizeof(*state)); + if (regs) { + state->sp = regs->regs[3]; + state->pc = regs->csr_era; + state->ra = regs->regs[1]; + } else if (task && task != current) { + state->sp = thread_saved_fp(task); + state->pc = thread_saved_ra(task); + state->ra = 0; + } else { + state->sp = (unsigned long)__builtin_frame_address(0); + state->pc = (unsigned long)__builtin_return_address(0); + state->ra = 0; + } + state->task = task; + get_stack_info(state->sp, state->task, &state->stack_info); + state->pc = unwind_graph_addr(state, state->pc, state->sp); +} + +static __always_inline unsigned long __unwind_get_return_address(struct unwind_state *state) +{ + return unwind_done(state) ? 0 : state->pc; +} #endif /* _ASM_UNWIND_H */ |