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Diffstat (limited to 'test/aoutso.asm')
-rw-r--r-- | test/aoutso.asm | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/test/aoutso.asm b/test/aoutso.asm new file mode 100644 index 00000000..b95b66ee --- /dev/null +++ b/test/aoutso.asm @@ -0,0 +1,96 @@ +; test source file for assembling to NetBSD/FreeBSD a.out shared library +; build with: +; nasm -f aoutb aoutso.asm +; ld -Bshareable -o aoutso.so aoutso.o +; test with: +; cc -o aoutso aouttest.c aoutso.so +; ./aoutso + +; 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 +; [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 + + BITS 32 + EXTERN __GLOBAL_OFFSET_TABLE_ + GLOBAL _lrotate:function ; [1] + GLOBAL _greet:function ; [1] + GLOBAL _asmstr:data _asmstr.end-_asmstr ; [2] + GLOBAL _textptr:data 4 ; [2] + GLOBAL _selfptr:data 4 ; [2] + GLOBAL _integer:data 4 ; [3] + EXTERN _printf ; [10] + COMMON _commvar 4 ; [7] + + SECTION .text + +; prototype: long lrotate(long x, int num); +_lrotate: ; [1] + push ebp + mov ebp,esp + mov eax,[ebp+8] + mov ecx,[ebp+12] +.label rol eax,1 ; [4] [8] + loop .label ; [9] [12] + mov esp,ebp + pop ebp + ret + +; prototype: void greet(void); +_greet push ebx ; we'll use EBX for GOT, so save it + call .getgot +.getgot: pop ebx + add ebx,__GLOBAL_OFFSET_TABLE_ + $$ - .getgot wrt ..gotpc + mov eax,[ebx+_integer wrt ..got] ; [14] + mov eax,[eax] + inc eax + mov [ebx+localint wrt ..gotoff],eax ; [14] + mov eax,[ebx+_commvar wrt ..got] + push dword [eax] + mov eax,[ebx+localptr wrt ..gotoff] ; [13] + push dword [eax] + mov eax,[ebx+_integer wrt ..got] ; [1] [14] + push dword [eax] + lea eax,[ebx+_printfstr wrt ..gotoff] + push eax ; [13] + call _printf wrt ..plt ; [11] + add esp,16 + pop ebx + ret + + SECTION .data + +; a string +_asmstr db 'hello, world', 0 ; [2] +.end + +; a string for Printf +_printfstr db "integer==%d, localint==%d, commvar=%d" + db 10, 0 + +; some pointers +localptr dd localint ; [5] [17] +_textptr dd _greet wrt ..sym ; [15] +_selfptr dd _selfptr wrt ..sym ; [16] + + SECTION .bss + +; an integer +_integer resd 1 ; [3] + +; a local integer +localint resd 1 ; [6] |