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52 lines
1.1 KiB
ArmAsm
52 lines
1.1 KiB
ArmAsm
/* https://cirosantilli.com/linux-kernel-module-cheat#assembly-registers */
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#include <lkmc.h>
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LKMC_PROLOGUE
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/* 31 64-bit eXtended general purpose registers. */
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mov x0, 0
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mov x1, 1
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mov x2, 2
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mov x3, 3
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mov x4, 4
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mov x5, 5
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mov x6, 6
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mov x7, 7
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mov x8, 8
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mov x9, 9
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mov x10, 10
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mov x11, 11
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mov x12, 12
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mov x13, 13
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mov x14, 14
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mov x15, 15
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mov x16, 16
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mov x17, 17
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mov x18, 18
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mov x19, 19
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mov x20, 20
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mov x21, 21
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mov x22, 22
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mov x23, 23
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mov x24, 24
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mov x25, 25
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mov x26, 26
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mov x27, 27
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mov x28, 28
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/* x29 is used as the frame register by unoptimized GCC: it contains the initial stack.
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* TODO is there a standard recommending it? Does it have effects e.g. on GDB in
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* determining backtraces? */
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mov x29, 29
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/* x30 is the link register. BL stores the return address here. */
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/*mov x30, 30*/
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/* W form addresses the lower 4 bytes word, and zeroes the top. */
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ldr x0, =0x1111222233334444
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ldr x1, =0x5555666677778888
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mov w0, w1
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LKMC_ASSERT_EQ(x0, =0x0000000077778888)
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LKMC_EPILOGUE
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