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nos_link's Issues

Support _end Symbol

Hi!

We need the _end symbol which points to the offset of the end of the code:

void func(void) {
        extern char _end;
        static char* ptr = &_end;
        ptr += 1;
}

Would become:

        ; .file "test.s"
        .text
        .globl  func
        ; .align        1
:func                                   ; @func
; BB#0:                                 ; %entry
        ADD     [func.ptr], 0x1
        SET PC, POP

        .section        .data.rel,"aw",@progbits
:func.ptr                               ; @func.ptr
        .byte   _end

We need a way to find the end of the code segment to implement malloc.

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