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; test source file for assembling to MACH-O
; build with :
; yasm -f macho -m amd64 machotest64.asm
; gcc -m64 -o machotest64 machotest64.c machotest64.o
; This file should test the following:
; [1] Define and export a global text-section symbol
; [2] Define and export a global data-section symbol
; [3] Define and export a global BSS-section symbol
; [4] Define a non-global text-section symbol
; [5] Define a non-global data-section symbol
; [6] Define a non-global BSS-section symbol
; [7] Define a COMMON symbol
; [8] Define a NASM local label
; [9] Reference a NASM local label
; [10] Import an external symbol (note: printf replaced by another call)
; [11] Make a PC-relative call to an external symbol
; [12] Reference a text-section symbol in the text section
; [13] Reference a data-section symbol in the text section
; [14] Reference a BSS-section symbol in the text section
; [15] Reference a text-section symbol in the data section
; [16] Reference a data-section symbol in the data section
; [17] Reference a BSS-section symbol in the data section
; [18] Perform a 64 Bit relocation in the text section
[BITS 64]
[GLOBAL _lrotate] ; [1]
[GLOBAL _greet] ; [1]
[GLOBAL _asmstr] ; [2]
[GLOBAL _textptr] ; [2]
[GLOBAL _selfptr] ; [2]
[GLOBAL _integer] ; [3]
[EXTERN _druck] ; [10]
[COMMON _commvar 4] ; [7]
[GLOBAL _getstr] ;
[GLOBAL _readgreet] ;
[SECTION .text]
; prototype: long lrotate(long x, int num);
_lrotate: ; [1]
push rcx
mov rax,rdi
mov rcx,rsi
.label rol rax,1 ; [4] [8]
loop .label ; [9] [12]
pop rcx
ret
_getstr:
mov rax,qword _asmstr
ret
_readgreet:
mov rax,[qword localint] ; [18]
ret
_retrievelabel:
mov rax,[qword localptr]
ret
; prototype: void greet(void);
; calls "void druck(a,b,c,d);
_greet mov rax,[_integer wrt rip] ; [14]
inc rax
mov [localint wrt rip],rax ; [14]
push rdi
push rsi
push rdx
push rcx
mov rdi,qword _printfstr
mov rsi,[_integer wrt rip]
mov rdx,[localptr wrt rip]
mov rdx,[rdx]
mov rcx,[_commvar wrt rip]
call _druck
pop rcx
pop rdx
pop rsi
pop rdi
ret
; some internal calls
call _greet
call _retrievelabel
[SECTION .data]
; a string for Printf
_printfstr db "integer==%d, localint==%d, commvar=%d"
db 10, 0
; some pointers
localptr dq localint ; [5] [17]
_textptr dq _greet ; [15]
_selfptr dq _selfptr ; [16]
;[section .data2 align=16]
; a string
_asmstr db 'hello, world', 0 ; [2]
[SECTION .bss]
; an integer
_integer resq 1 ; [3]
; a local integer
localint resq 1 ; [6]