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