CODEWITHSUNDEEP
gccglobal-variableslinkage
user877329
user877329

Reputation: 6200

GCC global variable storage

Is it possible to force gcc to store an array in a specific segment?

I want this

static const Host_Vtable_Entrty Host_vtable[]=
{
{"Window_create",(Function)Window_create}
,{"Window_cropEllipse",(Function)Window_cropEllipse}
,{"Window_cropRect",(Function)Window_cropRect}
,{"Window_cropRectRound",(Function)Window_cropRectRound}
,{"Window_destroy",(Function)Window_destroy}
,{"Window_filenameGet",(Function)Window_filenameGet}
,{"Window_filenameGet",(Function)Window_messageBox}
,{"Window_move",(Function)Window_move}
,{"Window_styleSet",(Function)Window_styleSet}
};

To be stored in a read-only place, but it is put in the data segment:

    .data
.align 32
_ZL11Host_vtable:
.quad   .LC0
.quad   _Z13Window_createP6WindowP6ObjectPFyS2_PjyyEPFyS2_yPvE
.quad   .LC1
.quad   _Z18Window_cropEllipseP6Windowjdddd
.quad   .LC2
.quad   _Z15Window_cropRectP6Windowjdddd
.quad   .LC3
.quad   _Z20Window_cropRectRoundP6Windowjdddddd
.quad   .LC4
.quad   _Z14Window_destroyP6Window
.quad   .LC5
.quad   _Z18Window_filenameGetPcyPKcS1_j
.quad   .LC5
.quad   _Z17Window_messageBoxP6WindowPKcS2_j
.quad   .LC6
.quad   _Z11Window_moveP6Windowdddd
.quad   .LC7
.quad   _Z15Window_styleSetP6Windowjj

Do I need to write the assembly manually?

Upvotes: 0

Views: 665

Answers (1)

Some programmer dude
Some programmer dude

Reputation: 409166

If you search the GCC documentation for GCC-specific extensions to the language, you will stumble upon a document describing variable attributes. Here you will find one attribute called segment with examples on how to use it.

Upvotes: 1

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