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38 lines
948 B
ArmAsm
38 lines
948 B
ArmAsm
/* https://github.com/cirosantilli/linux-kernel-module-cheat#userland-assembly */
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#include <lkmc.h>
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.data
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myint: .long 0x12345678
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LKMC_PROLOGUE
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/* Immediate and register. */
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mov $0, %rax
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mov $1, %rax
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LKMC_ASSERT_EQ(%rax, $1)
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/* Register and register. */
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mov $0, %rax
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mov $1, %rbx
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mov %rbx, %rax
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LKMC_ASSERT_EQ(%rax, $1)
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/* Memory and register. */
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mov myint, %rax
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LKMC_ASSERT_EQ(%rax, $0x12345678)
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/* Memory and immediate. */
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movl $0x9ABCDEF0, myint
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LKMC_ASSERT_EQ(myint, $0x9ABCDEF0)
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/* Memory via pointer to address. */
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/* eax = &myint */
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mov $myint, %rax
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movl $0x11112222, (%rax)
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LKMC_ASSERT_EQ(myint, $0x11112222)
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/* Possible to move on itself, seems like a NOP and way to clear 32 high bits in x86-64:
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* http://stackoverflow.com/questions/11910501/why-did-gcc-generate-mov-eax-eax-and-what-does-it-mean
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*/
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mov %rax, %rax
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LKMC_EPILOGUE
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