Hi.
On the i370 target of a slightly modified
GCC 3.2.3, I am getting this strange padding:
DC 46X'00'
I asked Dave Pitts about it, and he
told me it is not related to the i370
machine definition and I should ask
the group for advice instead.
Note that one variable needs a padding
of 46 and another variable needs a
padding of 66, but for some reason only
the "46" appears at all, and that
appearance is completely redundant, and
the code does not use it at all (which
is why it causes no actual problem with
the variable that needs 66 padding).
Any insights? See code below.
Thanks. Paul.
void foo(void)
{
char buf[50] = "CDE";
char buf2[70] = "CDE";
bar(buf, buf2);
return;
}
COPY PDPTOP
CSECT
* Program text area
@@LC0 EQU *
DC C'CDE'
DC X'0'
DC 46X'00'
DS 0F
* X-func foo prologue
FOO PDPPRLG CINDEX=0,FRAME=224,BASER=12,ENTRY=YES
B @@FEN0
LTORG
@@FEN0 EQU *
DROP 12
BALR 12,0
USING *,12
@@PG0 EQU *
LR 11,1
L 10,=A(@@PGT0)
* Function foo code
L 2,=A(@@LC0)
* first buffer needs to copy the literal
* then 46 filler
MVC 96(4,13),0(2)
LA 6,100(,13)
LA 7,46(0,0)
SLR 4,4
LR 5,4
MVCL 6,4
* second bufer needs to copy the literal
* then 66 filler
MVC 152(4,13),0(2)
LA 6,156(,13)
LA 7,66(0,0)
SLR 4,4
LR 5,4
MVCL 6,4
* finished setting buffers, time for
* irrelevant function call
LA 2,96(,13)
ST 2,88(13)
LA 2,152(,13)
ST 2,92(13)
LA 1,88(,13)
L 15,=V(BAR)
BALR 14,15
* Function foo epilogue
PDPEPIL
* Function foo literal pool
DS 0F
LTORG
* Function foo page table
DS 0F
@@PGT0 EQU *
DC A(@@PG0)
END
