mirror of
https://github.com/cirosantilli/linux-kernel-module-cheat.git
synced 2026-01-23 18:25:57 +01:00
63 lines
1.1 KiB
C
63 lines
1.1 KiB
C
/* https://github.com/cirosantilli/linux-kernel-module-cheat#m5ops-instructions */
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#define ENABLED 1
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#if defined(__aarch64__)
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static void m5_checkpoint()
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{
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__asm__ __volatile__ ("mov x0, 0; mov x1, 0; .inst 0xff000110 | (0x43 << 16);");
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};
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static void m5_dump_stats()
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{
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__asm__ __volatile__ ("mov x0, 0; mov x1, 0; .inst 0xff000110 | (0x41 << 16);");
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};
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static void m5_exit()
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{
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__asm__ __volatile__ ("mov x0, 0; .inst 0xff000110 | (0x21 << 16);");
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};
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static void m5_reset_stats()
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{
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__asm__ __volatile__ ("mov x0, 0; mov x1, 0; .inst 0xff000110 | (0x40 << 16);");
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};
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#else
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#undef ENABLED
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#define ENABLED 0
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#endif
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int main(
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#if ENABLED
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int argc, char **argv
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#else
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void
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#endif
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)
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{
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#if defined(__aarch64__)
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char action;
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if (argc > 1) {
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action = argv[1][0];
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} else {
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action = 'e';
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}
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switch (action)
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{
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case 'c':
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m5_checkpoint(0, 0);
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break;
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case 'd':
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m5_dump_stats(0, 0);
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break;
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case 'e':
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m5_exit();
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break;
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case 'r':
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m5_reset_stats();
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break;
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}
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#endif
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return EXIT_SUCCESS;
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}
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