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33 lines
550 B
ArmAsm
33 lines
550 B
ArmAsm
/* https://github.com/cirosantilli/linux-kernel-module-cheat#arm-svc-instruction */
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#include <lkmc.h>
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.global main
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main:
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/* Do the svc. */
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svc 0
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/* Confirm that svc was called and modified myvar. */
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ldr x0, myvar
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ldr x1, mynewvar
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cmp x0, x1
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beq 1f
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bl abort
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1:
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/* Go home. */
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mov x0, 0
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ret
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LKMC_GLOBAL(lkmc_vector_trap_handler)
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/* Modify myvar as a visible side effect. */
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ldr x0, mynewvar
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ldr x1, =myvar
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str x0, [x1]
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ret
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myvar:
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.quad 0x0
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mynewvar:
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.quad 0x12346789ABCDEF0
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