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806a15b254
Kernel documentation states that it will change PAuth keys on exec() calls. Verify that all keys are correctly switched to new ones. Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com> Reviewed-by: Vincenzo Frascino <Vincenzo.Frascino@arm.com> Reviewed-by: Amit Daniel Kachhap <amit.kachhap@arm.com> Acked-by: Shuah Khan <skhan@linuxfoundation.org> Cc: Shuah Khan <shuah@kernel.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20200918104715.182310-4-boian4o1@gmail.com Signed-off-by: Will Deacon <will@kernel.org>
35 lines
768 B
C
35 lines
768 B
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2020 ARM Limited
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/auxv.h>
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#include "helper.h"
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int main(void)
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{
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struct signatures signed_vals;
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unsigned long hwcaps;
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size_t val;
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fread(&val, sizeof(size_t), 1, stdin);
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/* don't try to execute illegal (unimplemented) instructions) caller
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* should have checked this and keep worker simple
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*/
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hwcaps = getauxval(AT_HWCAP);
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if (hwcaps & HWCAP_PACA) {
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signed_vals.keyia = keyia_sign(val);
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signed_vals.keyib = keyib_sign(val);
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signed_vals.keyda = keyda_sign(val);
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signed_vals.keydb = keydb_sign(val);
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}
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signed_vals.keyg = (hwcaps & HWCAP_PACG) ? keyg_sign(val) : 0;
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fwrite(&signed_vals, sizeof(struct signatures), 1, stdout);
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return 0;
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}
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