7c83232161
Misalignment trap handling is only supported for M-mode and uses direct accesses to user memory. In S-mode, when handling usermode fault, this requires to use the get_user()/put_user() accessors. Implement load_u8(), store_u8() and get_insn() using these accessors for userspace and direct text access for kernel. Signed-off-by: Clément Léger <cleger@rivosinc.com> Reviewed-by: Björn Töpel <bjorn@rivosinc.com> Link: https://lore.kernel.org/r/20231004151405.521596-3-cleger@rivosinc.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
26 lines
570 B
C
26 lines
570 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_RISCV_ENTRY_COMMON_H
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#define _ASM_RISCV_ENTRY_COMMON_H
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#include <asm/stacktrace.h>
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void handle_page_fault(struct pt_regs *regs);
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void handle_break(struct pt_regs *regs);
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#ifdef CONFIG_RISCV_MISALIGNED
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int handle_misaligned_load(struct pt_regs *regs);
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int handle_misaligned_store(struct pt_regs *regs);
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#else
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static inline int handle_misaligned_load(struct pt_regs *regs)
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{
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return -1;
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}
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static inline int handle_misaligned_store(struct pt_regs *regs)
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{
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return -1;
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}
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#endif
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#endif /* _ASM_RISCV_ENTRY_COMMON_H */
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