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BSD 4_1c_2 release
[unix-history] / usr / src / ucb / pascal / src / fend.c
/* Copyright (c) 1979 Regents of the University of California */
static char sccsid[] = "@(#)fend.c 1.21 2/28/83";
#include "whoami.h"
#include "0.h"
#include "tree.h"
#include "opcode.h"
#include "objfmt.h"
#include "align.h"
#include "tmps.h"
/*
* this array keeps the pxp counters associated with
* functions and procedures, so that they can be output
* when their bodies are encountered
*/
int bodycnts[ DSPLYSZ ];
#ifdef PC
# include "pc.h"
# include "pcops.h"
#endif PC
#ifdef OBJ
int cntpatch;
int nfppatch;
#endif OBJ
struct nl *Fp;
int pnumcnt;
/*
* Funcend is called to
* finish a block by generating
* the code for the statements.
* It then looks for unresolved declarations
* of labels, procedures and functions,
* and cleans up the name list.
* For the program, it checks the
* semantics of the program
* statement (yuchh).
*/
funcend(fp, bundle, endline)
struct nl *fp;
int *bundle;
int endline;
{
register struct nl *p;
register int i, b;
int var, inp, out, *blk;
bool chkref;
struct nl *iop;
char *cp;
extern int cntstat;
# ifdef PC
struct entry_exit_cookie eecookie;
# endif PC
cntstat = 0;
/*
* yyoutline();
*/
if (program != NIL)
line = program->value[3];
blk = bundle[2];
if (fp == NIL) {
cbn--;
# ifdef PTREE
nesting--;
# endif PTREE
return;
}
#ifdef OBJ
/*
* Patch the branch to the
* entry point of the function
*/
patch4(fp->value[NL_ENTLOC]);
/*
* Put out the block entrance code and the block name.
* HDRSZE is the number of bytes of info in the static
* BEG data area exclusive of the proc name. It is
* currently defined as:
/* struct hdr {
/* long framesze; /* number of bytes of local vars */
/* long nargs; /* number of bytes of arguments */
/* bool tests; /* TRUE => perform runtime tests */
/* short offset; /* offset of procedure in source file */
/* char name[1]; /* name of active procedure */
/* };
*/
# define HDRSZE (2 * sizeof(long) + sizeof(short) + sizeof(bool))
var = put(2, ((lenstr(fp->symbol,0) + HDRSZE) << 8)
| (cbn == 1 && opt('p') == 0 ? O_NODUMP: O_BEG), (long)0);
/*
* output the number of bytes of arguments
* this is only checked on formal calls.
*/
put(2, O_CASE4, cbn == 1 ? (long)0 : (long)(fp->value[NL_OFFS]-DPOFF2));
/*
* Output the runtime test mode for the routine
*/
put(2, sizeof(bool) == 2 ? O_CASE2 : O_CASE4, opt('t') ? TRUE : FALSE);
/*
* Output line number and routine name
*/
put(2, O_CASE2, bundle[1]);
putstr(fp->symbol, 0);
#endif OBJ
#ifdef PC
/*
* put out the procedure entry code
*/
eecookie.nlp = fp;
if ( fp -> class == PROG ) {
/*
* If there is a label declaration in the main routine
* then there may be a non-local goto to it that does
* not appear in this module. We have to assume that
* such a reference may occur and generate code to
* prepare for it.
*/
if ( parts[ cbn ] & LPRT ) {
parts[ cbn ] |= ( NONLOCALVAR | NONLOCALGOTO );
}
codeformain();
ftnno = fp -> value[NL_ENTLOC];
prog_prologue(&eecookie);
stabfunc( "program" , fp -> class , bundle[1] , 0 );
} else {
ftnno = fp -> value[NL_ENTLOC];
fp_prologue(&eecookie);
stabfunc( fp -> symbol , fp -> class , bundle[1] , cbn - 1 );
for ( p = fp -> chain ; p != NIL ; p = p -> chain ) {
stabparam( p -> symbol , p2type( p -> type )
, p -> value[ NL_OFFS ] , lwidth( p -> type ) );
}
if ( fp -> class == FUNC ) {
/*
* stab the function variable
*/
p = fp -> ptr[ NL_FVAR ];
stablvar( p -> symbol , p2type( p -> type ) , cbn
, p -> value[ NL_OFFS ] , lwidth( p -> type ) );
}
/*
* stab local variables
* rummage down hash chain links.
*/
for ( i = 0 ; i <= 077 ; i++ ) {
for ( p = disptab[ i ] ; p != NIL ; p = p->nl_next) {
if ( ( p -> nl_block & 037 ) != cbn ) {
break;
}
/*
* stab local variables
* that's named variables, but not params
*/
if ( ( p -> symbol != NIL )
&& ( p -> class == VAR )
&& ( p -> value[ NL_OFFS ] < 0 ) ) {
stablvar( p -> symbol , p2type( p -> type ) , cbn
, p -> value[ NL_OFFS ] , lwidth( p -> type ) );
}
}
}
}
stablbrac( cbn );
/*
* ask second pass to allocate known locals
*/
putlbracket(ftnno, &sizes[cbn]);
fp_entrycode(&eecookie);
#endif PC
if ( monflg ) {
if ( fp -> value[ NL_CNTR ] != 0 ) {
inccnt( fp -> value [ NL_CNTR ] );
}
inccnt( bodycnts[ fp -> nl_block & 037 ] );
}
if (fp->class == PROG) {
/*
* The glorious buffers option.
* 0 = don't buffer output
* 1 = line buffer output
* 2 = 512 byte buffer output
*/
# ifdef OBJ
if (opt('b') != 1)
put(1, O_BUFF | opt('b') << 8);
# endif OBJ
# ifdef PC
if ( opt( 'b' ) != 1 ) {
putleaf( P2ICON , 0 , 0
, ADDTYPE( P2FTN | P2INT , P2PTR ) , "_BUFF" );
putleaf( P2ICON , opt( 'b' ) , 0 , P2INT , 0 );
putop( P2CALL , P2INT );
putdot( filename , line );
}
# endif PC
inp = 0;
out = 0;
for (p = fp->chain; p != NIL; p = p->chain) {
if (strcmp(p->symbol, input->symbol) == 0) {
inp++;
continue;
}
if (strcmp(p->symbol, output->symbol) == 0) {
out++;
continue;
}
iop = lookup1(p->symbol);
if (iop == NIL || bn != cbn) {
error("File %s listed in program statement but not declared", p->symbol);
continue;
}
if (iop->class != VAR) {
error("File %s listed in program statement but declared as a %s", p->symbol, classes[iop->class]);
continue;
}
if (iop->type == NIL)
continue;
if (iop->type->class != FILET) {
error("File %s listed in program statement but defined as %s",
p->symbol, nameof(iop->type));
continue;
}
# ifdef OBJ
put(2, O_CON24, text(iop->type) ? 0 : width(iop->type->type));
i = lenstr(p->symbol,0);
put(2, O_CON24, i);
put(2, O_LVCON, i);
putstr(p->symbol, 0);
put(2, O_LV | bn<<8+INDX, (int)iop->value[NL_OFFS]);
put(1, O_DEFNAME);
# endif OBJ
# ifdef PC
putleaf( P2ICON , 0 , 0
, ADDTYPE( P2FTN | P2INT , P2PTR )
, "_DEFNAME" );
putLV( p -> symbol , bn , iop -> value[NL_OFFS] ,
iop -> extra_flags , p2type( iop ) );
putCONG( p -> symbol , strlen( p -> symbol )
, LREQ );
putop( P2LISTOP , P2INT );
putleaf( P2ICON , strlen( p -> symbol )
, 0 , P2INT , 0 );
putop( P2LISTOP , P2INT );
putleaf( P2ICON
, text(iop->type) ? 0 : width(iop->type->type)
, 0 , P2INT , 0 );
putop( P2LISTOP , P2INT );
putop( P2CALL , P2INT );
putdot( filename , line );
# endif PC
}
}
/*
* Process the prog/proc/func body
*/
noreach = 0;
line = bundle[1];
statlist(blk);
# ifdef PTREE
{
pPointer Body = tCopy( blk );
pDEF( PorFHeader[ nesting -- ] ).PorFBody = Body;
}
# endif PTREE
# ifdef OBJ
if (cbn== 1 && monflg != 0) {
patchfil(cntpatch - 2, (long)cnts, 2);
patchfil(nfppatch - 2, (long)pfcnt, 2);
}
# endif OBJ
# ifdef PC
if ( fp -> class == PROG && monflg ) {
putleaf( P2ICON , 0 , 0 , ADDTYPE( P2FTN | P2INT , P2PTR )
, "_PMFLUSH" );
putleaf( P2ICON , cnts , 0 , P2INT , 0 );
putleaf( P2ICON , pfcnt , 0 , P2INT , 0 );
putop( P2LISTOP , P2INT );
putLV( PCPCOUNT , 0 , 0 , NGLOBAL , P2INT );
putop( P2LISTOP , P2INT );
putop( P2CALL , P2INT );
putdot( filename , line );
}
# endif PC
/*
* Clean up the symbol table displays and check for unresolves
*/
line = endline;
if (fp->class == PROG && inp == 0 && (input->nl_flags & (NUSED|NMOD)) != 0) {
recovered();
error("Input is used but not defined in the program statement");
}
if (fp->class == PROG && out == 0 && (output->nl_flags & (NUSED|NMOD)) != 0) {
recovered();
error("Output is used but not defined in the program statement");
}
b = cbn;
Fp = fp;
chkref = syneflg == errcnt[cbn] && opt('w') == 0;
for (i = 0; i <= 077; i++) {
for (p = disptab[i]; p != NIL && (p->nl_block & 037) == b; p = p->nl_next) {
/*
* Check for variables defined
* but not referenced
*/
if (chkref && p->symbol != NIL)
switch (p->class) {
case FIELD:
/*
* If the corresponding record is
* unused, we shouldn't complain about
* the fields.
*/
default:
if ((p->nl_flags & (NUSED|NMOD)) == 0) {
warning();
nerror("%s %s is neither used nor set", classes[p->class], p->symbol);
break;
}
/*
* If a var parameter is either
* modified or used that is enough.
*/
if (p->class == REF)
continue;
# ifdef OBJ
if ((p->nl_flags & NUSED) == 0) {
warning();
nerror("%s %s is never used", classes[p->class], p->symbol);
break;
}
# endif OBJ
# ifdef PC
if (((p->nl_flags & NUSED) == 0) && ((p->extra_flags & NEXTERN) == 0)) {
warning();
nerror("%s %s is never used", classes[p->class], p->symbol);
break;
}
# endif PC
if ((p->nl_flags & NMOD) == 0) {
warning();
nerror("%s %s is used but never set", classes[p->class], p->symbol);
break;
}
case LABEL:
case FVAR:
case BADUSE:
break;
}
switch (p->class) {
case BADUSE:
cp = "s";
if (p->chain->ud_next == NIL)
cp++;
eholdnl();
if (p->value[NL_KINDS] & ISUNDEF)
nerror("%s undefined on line%s", p->symbol, cp);
else
nerror("%s improperly used on line%s", p->symbol, cp);
pnumcnt = 10;
pnums(p->chain);
pchr('\n');
break;
case FUNC:
case PROC:
# ifdef OBJ
if ((p->nl_flags & NFORWD))
nerror("Unresolved forward declaration of %s %s", classes[p->class], p->symbol);
# endif OBJ
# ifdef PC
if ((p->nl_flags & NFORWD) && ((p->extra_flags & NEXTERN) == 0))
nerror("Unresolved forward declaration of %s %s", classes[p->class], p->symbol);
# endif PC
break;
case LABEL:
if (p->nl_flags & NFORWD)
nerror("label %s was declared but not defined", p->symbol);
break;
case FVAR:
if ((p->nl_flags & NMOD) == 0)
nerror("No assignment to the function variable");
break;
}
}
/*
* Pop this symbol
* table slot
*/
disptab[i] = p;
}
# ifdef OBJ
put(1, O_END);
# endif OBJ
# ifdef PC
fp_exitcode(&eecookie);
stabrbrac(cbn);
putrbracket(ftnno);
fp_epilogue(&eecookie);
if (fp -> class != PROG) {
fp_formalentry(&eecookie);
}
/*
* declare pcp counters, if any
*/
if ( monflg && fp -> class == PROG ) {
putprintf( " .data" , 0 );
aligndot(P2INT);
putprintf( " .comm " , 1 );
putprintf( PCPCOUNT , 1 );
putprintf( ",%d" , 0 , ( cnts + 1 ) * sizeof (long) );
putprintf( " .text" , 0 );
}
# endif PC
#ifdef DEBUG
dumpnl(fp->ptr[2], fp->symbol);
#endif
#ifdef OBJ
/*
* save the namelist for the debugger pdx
*/
savenl(fp->ptr[2], fp->symbol);
#endif
/*
* Restore the
* (virtual) name list
* position
*/
nlfree(fp->ptr[2]);
/*
* Proc/func has been
* resolved
*/
fp->nl_flags &= ~NFORWD;
/*
* Patch the beg
* of the proc/func to
* the proper variable size
*/
if (Fp == NIL)
elineon();
# ifdef OBJ
patchfil(var, leven(-sizes[cbn].om_max), 2);
# endif OBJ
cbn--;
if (inpflist(fp->symbol)) {
opop('l');
}
}
#ifdef PC
/*
* construct the long name of a function based on it's static nesting.
* into a caller-supplied buffer (that should be about BUFSIZ big).
*/
sextname( buffer , name , level )
char buffer[];
char *name;
int level;
{
char *starthere;
int i;
starthere = &buffer[0];
for ( i = 1 ; i < level ; i++ ) {
sprintf( starthere , EXTFORMAT , enclosing[ i ] );
starthere += strlen( enclosing[ i ] ) + 1;
}
sprintf( starthere , EXTFORMAT , name );
starthere += strlen( name ) + 1;
if ( starthere >= &buffer[ BUFSIZ ] ) {
panic( "sextname" );
}
}
/*
* code for main()
*/
#ifdef vax
codeformain()
{
putprintf(" .text" , 0 );
putprintf(" .align 1" , 0 );
putprintf(" .globl _main" , 0 );
putprintf("_main:" , 0 );
putprintf(" .word 0" , 0 );
if ( opt ( 't' ) ) {
putprintf(" pushl $1" , 0 );
} else {
putprintf(" pushl $0" , 0 );
}
putprintf(" calls $1,_PCSTART" , 0 );
putprintf(" movl 4(ap),__argc" , 0 );
putprintf(" movl 8(ap),__argv" , 0 );
putprintf(" calls $0,_program" , 0 );
putprintf(" pushl $0" , 0 );
putprintf(" calls $1,_PCEXIT" , 0 );
}
/*
* prologue for the program.
* different because it
* doesn't have formal entry point
*/
prog_prologue(eecookiep)
struct entry_exit_cookie *eecookiep;
{
putprintf(" .text" , 0 );
putprintf(" .align 1" , 0 );
putprintf(" .globl _program" , 0 );
putprintf("_program:" , 0 );
/*
* register save mask
*/
eecookiep -> savlabel = getlab();
putprintf(" .word %s%d", 0, SAVE_MASK_LABEL , eecookiep -> savlabel );
}
fp_prologue(eecookiep)
struct entry_exit_cookie *eecookiep;
{
int ftnno = eecookiep -> nlp -> value[NL_ENTLOC];
sextname( eecookiep -> extname, eecookiep -> nlp -> symbol , cbn - 1 );
putprintf( " .text" , 0 );
putprintf( " .align 1" , 0 );
putprintf( " .globl %s%s", 0, FORMALPREFIX, eecookiep -> extname );
putprintf( " .globl %s" , 0 , eecookiep -> extname );
putprintf( "%s:" , 0 , eecookiep -> extname );
/*
* register save mask
*/
eecookiep -> savlabel = getlab();
putprintf(" .word %s%d", 0, SAVE_MASK_LABEL , eecookiep -> savlabel );
}
/*
* code before any user code.
* or code that is machine dependent.
*/
fp_entrycode(eecookiep)
struct entry_exit_cookie *eecookiep;
{
int ftnno = eecookiep -> nlp -> value[NL_ENTLOC];
int proflabel = getlab();
int setjmp0 = getlab();
/*
* top of code; destination of jump from formal entry code.
*/
eecookiep -> toplabel = getlab();
putlab( eecookiep -> toplabel );
putprintf(" subl2 $%s%d,sp" , 0 , FRAME_SIZE_LABEL, ftnno );
if ( profflag ) {
/*
* call mcount for profiling
*/
putprintf( " moval " , 1 );
putprintf( PREFIXFORMAT , 1 , LABELPREFIX , proflabel );
putprintf( ",r0" , 0 );
putprintf( " jsb mcount" , 0 );
putprintf( " .data" , 0 );
putprintf( " .align 2" , 0 );
putlab( proflabel );
putprintf( " .long 0" , 0 );
putprintf( " .text" , 0 );
}
/*
* if there are nested procedures that access our variables
* we must save the display.
*/
if ( parts[ cbn ] & NONLOCALVAR ) {
/*
* save old display
*/
putprintf( " movq %s+%d,%d(%s)" , 0
, DISPLAYNAME , cbn * sizeof(struct dispsave)
, DSAVEOFFSET , P2FPNAME );
/*
* set up new display by saving AP and FP in appropriate
* slot in display structure.
*/
putprintf( " movq %s,%s+%d" , 0
, P2APNAME , DISPLAYNAME , cbn * sizeof(struct dispsave) );
}
/*
* set underflow checking if runtime tests
*/
if ( opt( 't' ) ) {
putprintf( " bispsw $0xe0" , 0 );
}
/*
* zero local variables if checking is on
* by calling blkclr( bytes of locals , starting local address );
*/
if ( opt( 't' ) && ( -sizes[ cbn ].om_max ) > DPOFF1 ) {
putleaf( P2ICON , 0 , 0 , ADDTYPE( P2FTN | P2INT , P2PTR )
, "_blkclr" );
putLV( 0 , cbn , sizes[ cbn ].om_max , NLOCAL , P2CHAR );
putleaf( P2ICON , ( -sizes[ cbn ].om_max ) - DPOFF1
, 0 , P2INT , 0 );
putop( P2LISTOP , P2INT );
putop( P2CALL , P2INT );
putdot( filename , line );
}
/*
* set up goto vector if non-local goto to this frame
*/
if ( parts[ cbn ] & NONLOCALGOTO ) {
putleaf( P2ICON , 0 , 0 , ADDTYPE( P2FTN | P2INT , P2PTR )
, "_setjmp" );
putLV( 0 , cbn , GOTOENVOFFSET , NLOCAL , P2PTR|P2STRTY );
putop( P2CALL , P2INT );
putleaf( P2ICON , 0 , 0 , P2INT , 0 );
putop( P2NE , P2INT );
putleaf( P2ICON , setjmp0 , 0 , P2INT , 0 );
putop( P2CBRANCH , P2INT );
putdot( filename , line );
/*
* on non-local goto, setjmp returns with address to
* be branched to.
*/
putprintf( " jmp (r0)" , 0 );
putlab(setjmp0);
}
}
fp_exitcode(eecookiep)
struct entry_exit_cookie *eecookiep;
{
/*
* if there were file variables declared at this level
* call PCLOSE( ap ) to clean them up.
*/
if ( dfiles[ cbn ] ) {
putleaf( P2ICON , 0 , 0 , ADDTYPE( P2FTN | P2INT , P2PTR )
, "_PCLOSE" );
putleaf( P2REG , 0 , P2AP , ADDTYPE( P2CHAR , P2PTR ) , 0 );
putop( P2CALL , P2INT );
putdot( filename , line );
}
/*
* if this is a function,
* the function variable is the return value.
* if it's a scalar valued function, return scalar,
* else, return a pointer to the structure value.
*/
if ( eecookiep-> nlp -> class == FUNC ) {
struct nl *fvar = eecookiep-> nlp -> ptr[ NL_FVAR ];
long fvartype = p2type( fvar -> type );
long label;
char labelname[ BUFSIZ ];
switch ( classify( fvar -> type ) ) {
case TBOOL:
case TCHAR:
case TINT:
case TSCAL:
case TDOUBLE:
case TPTR:
putRV( fvar -> symbol , ( fvar -> nl_block ) & 037 ,
fvar -> value[ NL_OFFS ] ,
fvar -> extra_flags ,
fvartype );
break;
default:
label = getlab();
sprintf( labelname , PREFIXFORMAT , LABELPREFIX , label );
putprintf( " .data" , 0 );
aligndot(A_STRUCT);
putprintf( " .lcomm %s,%d" , 0 ,
labelname , lwidth( fvar -> type ) );
putprintf( " .text" , 0 );
putleaf( P2NAME , 0 , 0 , fvartype , labelname );
putLV( fvar -> symbol , ( fvar -> nl_block ) & 037 ,
fvar -> value[ NL_OFFS ] ,
fvar -> extra_flags ,
fvartype );
putstrop( P2STASG , fvartype , lwidth( fvar -> type ) ,
align( fvar -> type ) );
putdot( filename , line );
putleaf( P2ICON , 0 , 0 , fvartype , labelname );
break;
}
putop( P2FORCE , fvartype );
putdot( filename , line );
}
/*
* if there are nested procedures we must save the display.
*/
if ( parts[ cbn ] & NONLOCALVAR ) {
/*
* restore old display entry from save area
*/
putprintf( " movq %d(%s),%s+%d" , 0
, DSAVEOFFSET , P2FPNAME
, DISPLAYNAME , cbn * sizeof(struct dispsave) );
}
}
fp_epilogue(eecookiep)
struct entry_exit_cookie *eecookiep;
{
putprintf(" ret" , 0 );
/*
* set the register save mask.
*/
putprintf(" .set %s%d,0x%x", 0,
SAVE_MASK_LABEL, eecookiep -> savlabel, savmask());
}
fp_formalentry(eecookiep)
struct entry_exit_cookie *eecookiep;
{
putprintf("%s%s:" , 0 , FORMALPREFIX , eecookiep -> extname );
putprintf(" .word %s%d", 0, SAVE_MASK_LABEL, eecookiep -> savlabel );
putleaf( P2ICON , 0 , 0 , ADDTYPE( P2FTN | P2INT , P2PTR ) , "_FCALL" );
putRV( 0 , cbn ,
eecookiep -> nlp -> value[ NL_OFFS ] + sizeof( struct formalrtn * ) ,
NPARAM , P2PTR | P2STRTY );
putRV(0, cbn, eecookiep -> nlp -> value[NL_OFFS], NPARAM, P2PTR|P2STRTY);
putop( P2LISTOP , P2INT );
putop( P2CALL , P2INT );
putdot( filename , line );
putjbr( eecookiep -> toplabel );
}
#endif vax
#ifdef mc68000
codeformain()
{
putprintf(" .text", 0);
putprintf(" .globl _main", 0);
putprintf("_main:", 0);
putprintf(" link %s,#0", 0, P2FPNAME);
if (opt('t')) {
putprintf(" pea 1", 0);
} else {
putprintf(" pea 0", 0);
}
putprintf(" jbsr _PCSTART", 0);
putprintf(" addql #4,sp", 0);
putprintf(" movl %s@(8),__argc", 0, P2FPNAME);
putprintf(" movl %s@(12),__argv", 0, P2FPNAME);
putprintf(" jbsr _program", 0);
putprintf(" pea 0", 0);
putprintf(" jbsr _PCEXIT", 0);
}
prog_prologue(eecookiep)
struct entry_exit_cookie *eecookiep;
{
int ftnno = eecookiep -> nlp -> value[NL_ENTLOC];
putprintf(" .text", 0);
putprintf(" .globl _program", 0);
putprintf("_program:", 0);
putprintf(" link %s,#0", 0, P2FPNAME);
putprintf(" addl #-%s%d,sp", 0, FRAME_SIZE_LABEL, ftnno);
/* touch new end of stack, to break more stack space */
putprintf(" tstb sp@(-%s%d)", 0, PAGE_BREAK_LABEL, ftnno);
putprintf(" moveml #%s%d,sp@", 0, SAVE_MASK_LABEL, ftnno);
}
fp_prologue(eecookiep)
struct entry_exit_cookie *eecookiep;
{
int ftnno = eecookiep -> nlp -> value[NL_ENTLOC];
sextname(eecookiep -> extname, eecookiep -> nlp -> symbol, cbn - 1);
putprintf(" .text", 0);
putprintf(" .globl %s%s", 0, FORMALPREFIX, eecookiep -> extname);
putprintf(" .globl %s", 0, eecookiep -> extname);
putprintf("%s:", 0, eecookiep -> extname);
putprintf(" link %s,#0", 0, P2FPNAME);
putprintf(" addl #-%s%d,sp", 0, FRAME_SIZE_LABEL, ftnno);
/* touch new end of stack, to break more stack space */
putprintf(" tstb sp@(-%s%d)", 0, PAGE_BREAK_LABEL, ftnno);
putprintf(" moveml #%s%d,sp@", 0, SAVE_MASK_LABEL, ftnno);
}
fp_entrycode(eecookiep)
struct entry_exit_cookie *eecookiep;
{
int proflabel = getlab();
int setjmp0 = getlab();
/*
* fill in the label cookie
*/
eecookiep -> toplabel = getlab();
putlab(eecookiep -> toplabel);
/*
* call mcount if we are profiling.
*/
if ( profflag ) {
putprintf(" movl #%s%d,a0", 0, LABELPREFIX, proflabel);
putprintf(" jsr mcount", 0);
putprintf(" .data", 0);
putprintf(" .even", 0);
putlab(proflabel);
putprintf(" .long 0", 0);
putprintf(" .text", 0);
}
/*
* if there are nested procedures that access our variables
* we must save the display
*/
if (parts[cbn] & NONLOCALVAR) {
/*
* save the old display
*/
putprintf(" movl %s+%d,%s@(%d)", 0,
DISPLAYNAME, cbn * sizeof(struct dispsave),
P2FPNAME, DSAVEOFFSET);
/*
* set up the new display by saving the framepointer
* in the display structure.
*/
putprintf(" movl %s,%s+%d", 0,
P2FPNAME, DISPLAYNAME, cbn * sizeof(struct dispsave));
}
/*
* zero local variables if checking is on
* by calling blkclr( bytes of locals , starting local address );
*/
if ( opt( 't' ) && ( -sizes[ cbn ].om_max ) > DPOFF1 ) {
putleaf( P2ICON , 0 , 0 , ADDTYPE( P2FTN | P2INT , P2PTR )
, "_blkclr" );
putLV( 0 , cbn , sizes[ cbn ].om_max , NLOCAL , P2CHAR );
putleaf( P2ICON , ( -sizes[ cbn ].om_max ) - DPOFF1
, 0 , P2INT , 0 );
putop( P2LISTOP , P2INT );
putop( P2CALL , P2INT );
putdot( filename , line );
}
/*
* set up goto vector if non-local goto to this frame
*/
if ( parts[ cbn ] & NONLOCALGOTO ) {
putleaf( P2ICON , 0 , 0 , ADDTYPE( P2FTN | P2INT , P2PTR )
, "_setjmp" );
putLV( 0 , cbn , GOTOENVOFFSET , NLOCAL , P2PTR|P2STRTY );
putop( P2CALL , P2INT );
putleaf( P2ICON , 0 , 0 , P2INT , 0 );
putop( P2NE , P2INT );
putleaf( P2ICON , setjmp0 , 0 , P2INT , 0 );
putop( P2CBRANCH , P2INT );
putdot( filename , line );
/*
* on non-local goto, setjmp returns with address to
* be branched to.
*/
putprintf(" movl d0,a0", 0);
putprintf(" jmp a0@", 0);
putlab(setjmp0);
}
}
fp_exitcode(eecookiep)
struct entry_exit_cookie *eecookiep;
{
/*
* if there were file variables declared at this level
* call PCLOSE( ap ) to clean them up.
*/
if ( dfiles[ cbn ] ) {
putleaf( P2ICON , 0 , 0 , ADDTYPE( P2FTN | P2INT , P2PTR )
, "_PCLOSE" );
putleaf( P2REG , 0 , P2AP , ADDTYPE( P2CHAR , P2PTR ) , 0 );
putop( P2CALL , P2INT );
putdot( filename , line );
}
/*
* if this is a function,
* the function variable is the return value.
* if it's a scalar valued function, return scalar,
* else, return a pointer to the structure value.
*/
if ( eecookiep -> nlp -> class == FUNC ) {
struct nl *fvar = eecookiep -> nlp -> ptr[ NL_FVAR ];
long fvartype = p2type( fvar -> type );
long label;
char labelname[ BUFSIZ ];
switch ( classify( fvar -> type ) ) {
case TBOOL:
case TCHAR:
case TINT:
case TSCAL:
case TDOUBLE:
case TPTR:
putRV( fvar -> symbol , ( fvar -> nl_block ) & 037 ,
fvar -> value[ NL_OFFS ] ,
fvar -> extra_flags ,
fvartype );
break;
default:
label = getlab();
sprintf( labelname , PREFIXFORMAT , LABELPREFIX , label );
putprintf(" .lcomm %s,%d", 0,
labelname, lwidth(fvar -> type));
putleaf( P2NAME , 0 , 0 , fvartype , labelname );
putLV( fvar -> symbol , ( fvar -> nl_block ) & 037 ,
fvar -> value[ NL_OFFS ] ,
fvar -> extra_flags ,
fvartype );
putstrop( P2STASG , fvartype , lwidth( fvar -> type ) ,
align( fvar -> type ) );
putdot( filename , line );
putleaf( P2ICON , 0 , 0 , fvartype , labelname );
break;
}
putop( P2FORCE , fvartype );
putdot( filename , line );
}
/*
* if we saved a display, we must restore it.
*/
if ( parts[ cbn ] & NONLOCALVAR ) {
/*
* restore old display entry from save area
*/
putprintf(" movl %s@(%d),%s+%d", 0,
P2FPNAME, DSAVEOFFSET,
DISPLAYNAME, cbn * sizeof(struct dispsave));
}
}
fp_epilogue(eecookiep)
struct entry_exit_cookie *eecookiep;
{
/*
* all done by the second pass.
*/
}
fp_formalentry(eecookiep)
struct entry_exit_cookie *eecookiep;
{
putprintf( "%s%s:" , 0 , FORMALPREFIX , eecookiep -> extname );
putprintf(" link %s,#0", 0, P2FPNAME);
putprintf(" addl #-%s%d,sp", 0, FRAME_SIZE_LABEL, ftnno);
/* touch new end of stack, to break more stack space */
putprintf(" tstb sp@(-%s%d)", 0, PAGE_BREAK_LABEL, ftnno);
putprintf(" moveml #%s%d,sp@", 0, SAVE_MASK_LABEL, ftnno);
putleaf( P2ICON , 0 , 0 , ADDTYPE( P2FTN | P2INT , P2PTR ) , "_FCALL" );
putRV( 0 , cbn ,
eecookiep -> nlp -> value[ NL_OFFS ] + sizeof( struct formalrtn * ) ,
NPARAM , P2PTR | P2STRTY );
putRV(0, cbn, eecookiep -> nlp -> value[NL_OFFS], NPARAM, P2PTR|P2STRTY);
putop( P2LISTOP , P2INT );
putop( P2CALL , P2INT );
putdot( filename , line );
putjbr( eecookiep -> toplabel );
}
#endif mc68000
#endif PC
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.