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This example shows how a simple C program generates assembly
language code. The program calls the printf()
routine. To run the assembled code, you need to link the file /usr/ccs/lib/crt0.o
and the C library file. Remember that the ld
command requires that you link the crt0.o
file first in 32-bit mode only. You do not need to link /usr/ccs/lib/crt0.o
in 64-bit mode.. C Program Listing | |
main ()
{
printf ("Hello World\n");
} |
Assembly Program Listing From the C Compiler | |
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.LEVEL 1.0
.SPACE $TEXT$,SORT=8
.SUBSPA $CODE$,QUAD=0,ALIGN=4,ACCESS=44,CODE_ONLY,SORT=24
main
.PROC
.CALLINFO CALLER,FRAME=0,SAVE_RP
.ENTRY
STW %r2,-20(0,%r30) ;offset 0x0
LDO 48(%r30),%r30 ;offset 0x4
ADDIL LR'$THIS_DATA$-$global$,%r27 ;offset 0x8
.CALL ARGW0=GR ;in=26;
BL printf,%r2 ;offset 0xc
LDO RR'$THIS_DATA$-$global$(%r1),%r26 ;offset 0x10
L$exit1
LDW -68(0,%r30),%r2 ;offset 0x14
BV %r0(%r2) ;offset 0x18
.EXIT
LDO -48(%r30),%r30 ;offset 0x1c
.PROCEND ;
.SPACE $TEXT$
.SUBSPA $LIT$,QUAD=0,ALIGN=8,ACCESS=44,SORT=16
.SUBSPA $CODE$
.SPACE $PRIVATE$,SORT=16
.SUBSPA $DATA$,QUAD=1,ALIGN=8,ACCESS=31,SORT=16
$THIS_DATA$
.ALIGN 4
.STRINGZ "Hello World\n"
.SUBSPA $SHORTDATA$,QUAD=1,ALIGN=8,ACCESS=31,SORT=24
$THIS_SHORTDATA$
.SUBSPA $BSS$,QUAD=1,ALIGN=8,ACCESS=31,ZERO,SORT=82
$THIS_BSS$
.SUBSPA $SHORTBSS$,QUAD=1,ALIGN=8,ACCESS=31,ZERO,SORT=80
$THIS_SHORTBSS$
.SUBSPA $STATICDATA$,QUAD=1,ALIGN=8,ACCESS=31,SORT=16
$STATIC_DATA$
.SUBSPA $SHORTSTATICDATA$,QUAD=1,ALIGN=8,ACCESS=31,SORT=24
$SHORT_STATIC_DATA$
.IMPORT $global$,DATA
.SPACE $TEXT$
.SUBSPA $CODE$
.EXPORT main,ENTRY,PRIV_LEV=3,RTNVAL=GR
.IMPORT printf,CODE
.END |
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