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- /* SPDX-License-Identifier: GPL-2.0 */
- /*
- * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
- */
- #ifndef _ASM_STACKTRACE_H
- #define _ASM_STACKTRACE_H
- #include <asm/asm.h>
- #include <asm/ptrace.h>
- #include <asm/loongarch.h>
- #include <asm/unwind_hints.h>
- #include <linux/stringify.h>
- enum stack_type {
- STACK_TYPE_UNKNOWN,
- STACK_TYPE_IRQ,
- STACK_TYPE_TASK,
- };
- struct stack_info {
- enum stack_type type;
- unsigned long begin, end, next_sp;
- };
- struct stack_frame {
- unsigned long fp;
- unsigned long ra;
- };
- bool in_irq_stack(unsigned long stack, struct stack_info *info);
- bool in_task_stack(unsigned long stack, struct task_struct *task, struct stack_info *info);
- int get_stack_info(unsigned long stack, struct task_struct *task, struct stack_info *info);
- static __always_inline bool on_thread_stack(void)
- {
- return !(((unsigned long)(current->stack) ^ current_stack_pointer) & ~(THREAD_SIZE - 1));
- }
- #define STR_LONG_L __stringify(LONG_L)
- #define STR_LONG_S __stringify(LONG_S)
- #define STR_LONGSIZE __stringify(LONGSIZE)
- #define STORE_ONE_REG(r) \
- STR_LONG_S " $r" __stringify(r)", %1, "STR_LONGSIZE"*"__stringify(r)"\n\t"
- #define CSRRD_ONE_REG(reg) \
- __stringify(csrrd) " %0, "__stringify(reg)"\n\t"
- static __always_inline void prepare_frametrace(struct pt_regs *regs)
- {
- __asm__ __volatile__(
- UNWIND_HINT_SAVE
- /* Save $ra */
- STORE_ONE_REG(1)
- /* Use $ra to save PC */
- "pcaddi $ra, 0\n\t"
- STR_LONG_S " $ra, %0\n\t"
- /* Restore $ra */
- STR_LONG_L " $ra, %1, "STR_LONGSIZE"\n\t"
- STORE_ONE_REG(2)
- STORE_ONE_REG(3)
- STORE_ONE_REG(4)
- STORE_ONE_REG(5)
- STORE_ONE_REG(6)
- STORE_ONE_REG(7)
- STORE_ONE_REG(8)
- STORE_ONE_REG(9)
- STORE_ONE_REG(10)
- STORE_ONE_REG(11)
- STORE_ONE_REG(12)
- STORE_ONE_REG(13)
- STORE_ONE_REG(14)
- STORE_ONE_REG(15)
- STORE_ONE_REG(16)
- STORE_ONE_REG(17)
- STORE_ONE_REG(18)
- STORE_ONE_REG(19)
- STORE_ONE_REG(20)
- STORE_ONE_REG(21)
- STORE_ONE_REG(22)
- STORE_ONE_REG(23)
- STORE_ONE_REG(24)
- STORE_ONE_REG(25)
- STORE_ONE_REG(26)
- STORE_ONE_REG(27)
- STORE_ONE_REG(28)
- STORE_ONE_REG(29)
- STORE_ONE_REG(30)
- STORE_ONE_REG(31)
- UNWIND_HINT_RESTORE
- : "=m" (regs->csr_era)
- : "r" (regs->regs)
- : "memory");
- __asm__ __volatile__(CSRRD_ONE_REG(LOONGARCH_CSR_BADV) : "=r" (regs->csr_badvaddr));
- __asm__ __volatile__(CSRRD_ONE_REG(LOONGARCH_CSR_CRMD) : "=r" (regs->csr_crmd));
- __asm__ __volatile__(CSRRD_ONE_REG(LOONGARCH_CSR_PRMD) : "=r" (regs->csr_prmd));
- __asm__ __volatile__(CSRRD_ONE_REG(LOONGARCH_CSR_EUEN) : "=r" (regs->csr_euen));
- __asm__ __volatile__(CSRRD_ONE_REG(LOONGARCH_CSR_ECFG) : "=r" (regs->csr_ecfg));
- __asm__ __volatile__(CSRRD_ONE_REG(LOONGARCH_CSR_ESTAT) : "=r" (regs->csr_estat));
- }
- #endif /* _ASM_STACKTRACE_H */
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