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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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d8e7f201a4
Some of the assembly in the LoongArch port seem to come from a prehistoric time, when the assembler didn't even have support for the ABI names we all come to know and love, thus used raw register numbers which hampered readability. The usages are found with a regex match inside arch/loongarch, then manually adjusted for those non-definitions. Signed-off-by: WANG Xuerui <git@xen0n.name> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
75 lines
2.0 KiB
C
75 lines
2.0 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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#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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