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7ba68b2172
Introduce a probe_user_read_inst() function to use in cases where probe_user_read() is used for getting an instruction. This will be more useful for prefixed instructions. Signed-off-by: Jordan Niethe <jniethe5@gmail.com> Reviewed-by: Alistair Popple <alistair@popple.id.au> [mpe: Don't write to *inst on error, fold in __user annotations] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200506034050.24806-14-jniethe5@gmail.com
43 lines
848 B
C
43 lines
848 B
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef _ASM_POWERPC_INST_H
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#define _ASM_POWERPC_INST_H
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/*
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* Instruction data type for POWER
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*/
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struct ppc_inst {
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u32 val;
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} __packed;
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#define ppc_inst(x) ((struct ppc_inst){ .val = x })
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static inline u32 ppc_inst_val(struct ppc_inst x)
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{
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return x.val;
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}
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static inline int ppc_inst_primary_opcode(struct ppc_inst x)
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{
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return ppc_inst_val(x) >> 26;
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}
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static inline struct ppc_inst ppc_inst_swab(struct ppc_inst x)
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{
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return ppc_inst(swab32(ppc_inst_val(x)));
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}
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static inline struct ppc_inst ppc_inst_read(const struct ppc_inst *ptr)
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{
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return *ptr;
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}
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static inline bool ppc_inst_equal(struct ppc_inst x, struct ppc_inst y)
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{
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return ppc_inst_val(x) == ppc_inst_val(y);
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}
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int probe_user_read_inst(struct ppc_inst *inst,
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struct ppc_inst __user *nip);
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#endif /* _ASM_POWERPC_INST_H */
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