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https://github.com/pkivolowitz/asm_book.git
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45 lines
1.1 KiB
ArmAsm
45 lines
1.1 KiB
ArmAsm
#include "macros.S"
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.align 2
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.text
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GLABEL main
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// adrp loads an address using a page number containing the variable
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MAIN
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START_PROC
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stp x21, x30, [sp, -16]!
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str x29, [sp, -16]!
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mov x29, sp
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mov x0, 8 // allocating a long
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CRT malloc // call malloc()
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mov x1, 0xFF // load payload
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str x1, [x0] // store payload
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LD_ADDR x1, ptr
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str x0, [x1]
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LD_ADDR x0, fmt // loads the address of fmt
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LD_ADDR x1, ptr // loads **ptr
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ldr x1, [x1] // dereferences **ptr to make *ptr
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ldr x2, [x1] // dereferences *ptr to get value
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#if defined(__APPLE__)
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stp x1, x2, [sp, -16]!
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CRT printf
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add sp, sp, 16
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#else
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CRT printf
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#endif
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mov x0, xzr
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ldr x29, [sp], 16
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ldp x21, x30, [sp], 16
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ret
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END_PROC
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.data
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ptr: .space 8
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fmt: .asciz "%p %ld\n"
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.end
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