95b980a00d
Introduce a probe_kernel_read_inst() function to use in cases where probe_kernel_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] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200506034050.24806-15-jniethe5@gmail.com
34 lines
566 B
C
34 lines
566 B
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright 2020, IBM Corporation.
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*/
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#include <linux/uaccess.h>
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#include <asm/inst.h>
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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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{
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unsigned int val;
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int err;
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err = probe_user_read(&val, nip, sizeof(val));
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if (!err)
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*inst = ppc_inst(val);
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return err;
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}
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int probe_kernel_read_inst(struct ppc_inst *inst,
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struct ppc_inst *src)
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{
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unsigned int val;
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int err;
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err = probe_kernel_read(&val, src, sizeof(val));
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if (!err)
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*inst = ppc_inst(val);
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return err;
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}
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