46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
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#include <stdint.h>
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#define TESTS 1000
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int main()
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{
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int i, count = 0;
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float perc;
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void *base = malloc(TESTS);
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for (i = 0; i < TESTS; i++) {
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uintptr_t in, x, y;
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in = i + (uintptr_t) base;
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asm("mov %0, %[in]\n\t"
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"pacia %0, sp\n\t" /* sigill if pauth not supported */
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"eor %0, %0, #4\n\t" /* corrupt single bit */
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"mov %1, %0\n\t"
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"autia %1, sp\n\t" /* validate corrupted pointer */
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"xpaci %0\n\t" /* strip pac from corrupted pointer */
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: /* out */ "=r"(x), "=r"(y)
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: /* in */ [in] "r" (in)
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: /* clobbers */);
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/*
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* Once stripped, the corrupted pointer is of the form 0x0000...wxyz.
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* We expect the autia to indicate failure, producing a pointer of the
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* form 0x000e....wxyz. Use xpaci and != for the test, rather than
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* extracting explicit bits from the top, because the location of the
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* error code "e" depends on the configuration of virtual memory.
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*/
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if (x != y) {
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count++;
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}
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}
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perc = (float) count / (float) TESTS;
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printf("Checks Passed: %0.2f%%", perc * 100.0);
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assert(perc > 0.95);
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return 0;
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}
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