9e216da9ef
After go1.16, go will use module mode by default, even when the repository is checked out under GOPATH or in a one-off directory. Add go.mod, go.sum to keep this repo buildable without opting out of the module mode. > go mod init github.com/mmcgrana/gobyexample > go mod tidy > go mod vendor In module mode, the 'vendor' directory is special and its contents will be actively maintained by the go command. pygments aren't the dependency the go will know about, so it will delete the contents from vendor directory. Move it to `third_party` directory now. And, vendor the blackfriday package. Note: the tutorial contents are not affected by the change in go1.16 because all the examples in this tutorial ask users to run the go command with the explicit list of files to be compiled (e.g. `go run hello-world.go` or `go build command-line-arguments.go`). When the source list is provided, the go command does not have to compute the build list and whether it's running in GOPATH mode or module mode becomes irrelevant.
97 lines
2.7 KiB
NASM
97 lines
2.7 KiB
NASM
; test source file for assembling to NetBSD/FreeBSD a.out shared library
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; build with:
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; nasm -f aoutb aoutso.asm
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; ld -Bshareable -o aoutso.so aoutso.o
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; test with:
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; cc -o aoutso aouttest.c aoutso.so
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; ./aoutso
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; This file should test the following:
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; [1] Define and export a global text-section symbol
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; [2] Define and export a global data-section symbol
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; [3] Define and export a global BSS-section symbol
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; [4] Define a non-global text-section symbol
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; [5] Define a non-global data-section symbol
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; [6] Define a non-global BSS-section symbol
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; [7] Define a COMMON symbol
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; [8] Define a NASM local label
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; [9] Reference a NASM local label
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; [10] Import an external symbol
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; [11] Make a PC-relative call to an external symbol
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; [12] Reference a text-section symbol in the text section
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; [13] Reference a data-section symbol in the text section
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; [14] Reference a BSS-section symbol in the text section
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; [15] Reference a text-section symbol in the data section
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; [16] Reference a data-section symbol in the data section
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; [17] Reference a BSS-section symbol in the data section
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BITS 32
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EXTERN __GLOBAL_OFFSET_TABLE_
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GLOBAL _lrotate:function ; [1]
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GLOBAL _greet:function ; [1]
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GLOBAL _asmstr:data _asmstr.end-_asmstr ; [2]
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GLOBAL _textptr:data 4 ; [2]
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GLOBAL _selfptr:data 4 ; [2]
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GLOBAL _integer:data 4 ; [3]
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EXTERN _printf ; [10]
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COMMON _commvar 4 ; [7]
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SECTION .text
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; prototype: long lrotate(long x, int num);
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_lrotate: ; [1]
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push ebp
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mov ebp,esp
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mov eax,[ebp+8]
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mov ecx,[ebp+12]
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.label rol eax,1 ; [4] [8]
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loop .label ; [9] [12]
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mov esp,ebp
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pop ebp
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ret
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; prototype: void greet(void);
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_greet push ebx ; we'll use EBX for GOT, so save it
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call .getgot
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.getgot: pop ebx
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add ebx,__GLOBAL_OFFSET_TABLE_ + $$ - .getgot wrt ..gotpc
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mov eax,[ebx+_integer wrt ..got] ; [14]
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mov eax,[eax]
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inc eax
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mov [ebx+localint wrt ..gotoff],eax ; [14]
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mov eax,[ebx+_commvar wrt ..got]
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push dword [eax]
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mov eax,[ebx+localptr wrt ..gotoff] ; [13]
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push dword [eax]
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mov eax,[ebx+_integer wrt ..got] ; [1] [14]
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push dword [eax]
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lea eax,[ebx+_printfstr wrt ..gotoff]
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push eax ; [13]
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call _printf wrt ..plt ; [11]
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add esp,16
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pop ebx
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ret
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SECTION .data
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; a string
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_asmstr db 'hello, world', 0 ; [2]
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.end
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; a string for Printf
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_printfstr db "integer==%d, localint==%d, commvar=%d"
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db 10, 0
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; some pointers
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localptr dd localint ; [5] [17]
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_textptr dd _greet wrt ..sym ; [15]
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_selfptr dd _selfptr wrt ..sym ; [16]
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SECTION .bss
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; an integer
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_integer resd 1 ; [3]
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; a local integer
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localint resd 1 ; [6]
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