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| 2 | |
| 3 | * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
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| 4 |
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| 5 | #ifndef _ASM_STACKTRACE_H
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| 6 | #define _ASM_STACKTRACE_H
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| 7 |
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| 8 | #include <asm/asm.h>
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| 9 | #include <asm/ptrace.h>
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| 10 | #include <asm/loongarch.h>
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| 11 | #include <asm/unwind_hints.h>
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| 12 | #include <linux/stringify.h>
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| 13 |
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| 14 | enum stack_type {
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| 15 | STACK_TYPE_UNKNOWN,
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| 16 | STACK_TYPE_IRQ,
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| 17 | STACK_TYPE_TASK,
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| 18 | };
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| 19 |
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| 20 | struct stack_info {
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| 21 | enum stack_type type;
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| 22 | unsigned long begin, end, next_sp;
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| 23 | };
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| 24 |
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| 25 | struct stack_frame {
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| 26 | unsigned long fp;
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| 27 | unsigned long ra;
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| 28 | };
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| 29 |
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| 30 | bool in_irq_stack(unsigned long stack, struct stack_info *info);
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| 31 | bool in_task_stack(unsigned long stack, struct task_struct *task, struct stack_info *info);
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| 32 | int get_stack_info(unsigned long stack, struct task_struct *task, struct stack_info *info);
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| 33 |
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| 34 | static __always_inline bool on_thread_stack(void)
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| 35 | {
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| 36 | return !(((unsigned long)(current->stack) ^ current_stack_pointer) & ~(THREAD_SIZE - 1));
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| 37 | }
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| 38 |
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| 39 | #define STR_LONG_L __stringify(LONG_L)
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| 40 | #define STR_LONG_S __stringify(LONG_S)
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| 41 | #define STR_LONGSIZE __stringify(LONGSIZE)
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| 42 |
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| 43 | #define STORE_ONE_REG(r) \
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| 44 | STR_LONG_S " $r" __stringify(r)", %1, "STR_LONGSIZE"*"__stringify(r)"\n\t"
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| 45 |
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| 46 | #define CSRRD_ONE_REG(reg) \
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| 47 | __stringify(csrrd) " %0, "__stringify(reg)"\n\t"
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| 48 |
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| 49 | static __always_inline void prepare_frametrace(struct pt_regs *regs)
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| 50 | {
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| 51 | __asm__ __volatile__(
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| 52 | UNWIND_HINT_SAVE
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| 53 |
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| 54 | STORE_ONE_REG(1)
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| 55 |
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| 56 | "pcaddi $ra, 0\n\t"
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| 57 | STR_LONG_S " $ra, %0\n\t"
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| 58 |
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| 59 | STR_LONG_L " $ra, %1, "STR_LONGSIZE"\n\t"
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| 60 | STORE_ONE_REG(2)
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| 61 | STORE_ONE_REG(3)
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| 62 | STORE_ONE_REG(4)
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| 63 | STORE_ONE_REG(5)
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| 64 | STORE_ONE_REG(6)
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| 65 | STORE_ONE_REG(7)
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| 66 | STORE_ONE_REG(8)
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| 67 | STORE_ONE_REG(9)
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| 68 | STORE_ONE_REG(10)
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| 69 | STORE_ONE_REG(11)
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| 70 | STORE_ONE_REG(12)
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| 71 | STORE_ONE_REG(13)
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| 72 | STORE_ONE_REG(14)
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| 73 | STORE_ONE_REG(15)
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| 74 | STORE_ONE_REG(16)
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| 75 | STORE_ONE_REG(17)
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| 76 | STORE_ONE_REG(18)
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| 77 | STORE_ONE_REG(19)
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| 78 | STORE_ONE_REG(20)
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| 79 | STORE_ONE_REG(21)
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| 80 | STORE_ONE_REG(22)
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| 81 | STORE_ONE_REG(23)
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| 82 | STORE_ONE_REG(24)
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| 83 | STORE_ONE_REG(25)
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| 84 | STORE_ONE_REG(26)
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| 85 | STORE_ONE_REG(27)
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| 86 | STORE_ONE_REG(28)
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| 87 | STORE_ONE_REG(29)
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| 88 | STORE_ONE_REG(30)
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| 89 | STORE_ONE_REG(31)
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| 90 | UNWIND_HINT_RESTORE
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| 91 | : "=m" (regs->csr_era)
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| 92 | : "r" (regs->regs)
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| 93 | : "memory");
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| 94 | __asm__ __volatile__(CSRRD_ONE_REG(LOONGARCH_CSR_BADV) : "=r" (regs->csr_badvaddr));
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| 95 | __asm__ __volatile__(CSRRD_ONE_REG(LOONGARCH_CSR_CRMD) : "=r" (regs->csr_crmd));
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| 96 | __asm__ __volatile__(CSRRD_ONE_REG(LOONGARCH_CSR_PRMD) : "=r" (regs->csr_prmd));
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| 97 | __asm__ __volatile__(CSRRD_ONE_REG(LOONGARCH_CSR_EUEN) : "=r" (regs->csr_euen));
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| 98 | __asm__ __volatile__(CSRRD_ONE_REG(LOONGARCH_CSR_ECFG) : "=r" (regs->csr_ecfg));
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| 99 | __asm__ __volatile__(CSRRD_ONE_REG(LOONGARCH_CSR_ESTAT) : "=r" (regs->csr_estat));
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| 100 | }
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| 101 |
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| 102 | #endif
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