mirror of
https://github.com/cirosantilli/linux-kernel-module-cheat.git
synced 2026-01-23 02:05:57 +01:00
43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
/* Dump registers that cannot be read from EL0. */
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#include <stdio.h>
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#include <inttypes.h>
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int main(void) {
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uint32_t sctlr_el1;
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__asm__ ("mrs %0, sctlr_el1" : "=r" (sctlr_el1) : :);
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printf("SCTLR_EL1 0x%" PRIX32 "\n", sctlr_el1);
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printf("SCTLR_EL1.A 0x%" PRIX32 "\n", (sctlr_el1 >> 1) & 1);
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/* https://cirosantilli.com/linux-kernel-module-cheat#arm-paging */
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printf("SCTLR_EL1.M 0x%" PRIX32 "\n", (sctlr_el1 >> 0) & 1);
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uint64_t id_aa64pfr0_el1;
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__asm__ ("mrs %0, id_aa64pfr0_el1" : "=r" (id_aa64pfr0_el1) : :);
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printf("ID_AA64PFR0_EL1 0x%" PRIX64 "\n", id_aa64pfr0_el1);
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printf("ID_AA64PFR0_EL1.SVE 0x%" PRIX64 "\n", (id_aa64pfr0_el1 >> 32) & 0xF);
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uint64_t CurrentEL;
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__asm__ ("mrs %0, CurrentEL;" : "=r" (CurrentEL) : :);
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printf("CurrentEL 0x%" PRIX64 "\n", CurrentEL);
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/* https://cirosantilli.com/linux-kernel-module-cheat#arm-exception-levels */
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printf("CurrentEL.EL 0x%" PRIX64 "\n", CurrentEL >> 2);
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/* https://cirosantilli.com/linux-kernel-module-cheat#arm-paging */
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{
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uint64_t tcr_el1;
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__asm__ ("mrs %0, tcr_el1;" : "=r" (tcr_el1) : :);
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printf("TCR_EL1 0x%" PRIX64 "\n", tcr_el1);
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printf("TCR_EL1.A1 0x%" PRIX64 "\n", (tcr_el1 >> 22) & 1);
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uint64_t ttbr0_el1;
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__asm__ ("mrs %0, ttbr0_el1;" : "=r" (ttbr0_el1) : :);
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printf("TTBR0_EL1 0x%" PRIX64 "\n", ttbr0_el1);
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uint64_t ttbr1_el1;
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__asm__ ("mrs %0, ttbr1_el1;" : "=r" (ttbr1_el1) : :);
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printf("TTBR1_EL1 0x%" PRIX64 "\n", ttbr1_el1);
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}
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return 0;
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}
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