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25 lines
536 B
ArmAsm
25 lines
536 B
ArmAsm
/* https://cirosantilli.com/linux-kernel-module-cheat#arm-adr-instruction */
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#include <lkmc.h>
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LKMC_PROLOGUE
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/* Actual usage pattern. */
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adrp x19, mylong
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add x19, x19, :lo12:mylong
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ldr x20, [x19]
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LKMC_ASSERT_EQ(x19, =mylong)
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LKMC_ASSERT_EQ(x20, =0x1122334455667788)
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/* Minimal testcase. */
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adrp x0, .Llabel
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adr x1, .Llabel
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.Llabel:
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/* Clear the lower 12 bits. */
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bic x1, x1, 0xFF
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bic x1, x1, 0xF00
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LKMC_ASSERT_EQ_REG(x0, x1)
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LKMC_EPILOGUE
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.data
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mylong:
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.quad 0x1122334455667788
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