[Issue 9760] New: PIC code uses variable and thus needs a stack frame

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=9760

           Summary: PIC code uses variable and thus needs a stack frame
           Product: D
           Version: D2
          Platform: x86
        OS/Version: Linux
            Status: NEW
          Severity: major
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: code at dawg.eu


--- Comment #0 from Martin Nowak <code at dawg.eu> 2013-03-19 13:47:58 PDT ---
cat > bug.d << CODE
void foo() {}

void bug()
{
    asm { naked; }
    foo();
    asm { ret; }
}

CODE

--------------------
dmd -c -m32 -fPIC bug.d
--------------------
_D3bug3bugFZv PROC NEAR
        call    ?_003                                   ; 0000 _ E8, 00000000

?_003   LABEL NEAR
        pop     eax                                     ; 0005 _ 58
        add     eax, offset _GLOBAL_OFFSET_TABLE_-$+1H  ; 0006 _ 05,
00000002(GOT r)
        mov     dword ptr [ebp-4H], eax                 ; 000B _ 89. 45, FC
        mov     ebx, dword ptr [ebp-4H]                 ; 000E _ 8B. 5D, FC
        call    _D3bug3fooFZv                           ; 0011 _ E8,
FFFFFFFC(PLT r)
        ret                                             ; 0016 _ C3
_D3bug3bugFZv ENDP

EBP isn't set up so storing the localgot will overwrite some other memory.
Not sure if we want to fix this because one might argue that non-asm is invalid
in naked asm blocks.

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