| /* 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 <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); |
| |
| #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__( |
| /* 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) |
| : "=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 */ |
