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https://github.com/cirosantilli/linux-kernel-module-cheat.git
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c8c4f89854
Previously had wonky line pointer in asm_main. New interface simpler and more portable. Add tests for ASSERT_EQ_ and family in arm and aarch64, previously on x86_64. ASSERT_EQ_ and family in ARM can now either take =123, =addr or var, before this the = was added on macros so var was not possible. Define the main function directly in assembly, the C driver was useless.
22 lines
647 B
ArmAsm
22 lines
647 B
ArmAsm
/* https://github.com/cirosantilli/linux-kernel-module-cheat#arm-adr-instruction */
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#include <lkmc.h>
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.data
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data_label:
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.word 0x1234678
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LKMC_PROLOGUE
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/* This is not possible in v7 because the label is in another section.
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* objdump says that this generates a R_AARCH64_ADR_PRE relocation.
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* which looks specific to ADR, and therefore makes it more likely
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* that there was no such relocation in v7.
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*
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* This relocation is particularly important because str does not have a
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* pc-relative mode in ARMv8.
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*/
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adr x0, data_label
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ldr x1, =data_label
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label:
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LKMC_ASSERT_EQ_REG(x0, x1)
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LKMC_EPILOGUE
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