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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103/* 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 */