+#ifndef lint
+ static char *sccsid = "@(#)vax.c 1.1 (Berkeley) %G%";
+#endif not lint
+
+#include "gprof.h"
+
+ /*
+ * a namelist entry to be the child of indirect calls
+ */
+nltype indirectchild = {
+ "(*)" , /* the name */
+ (unsigned long) 0 , /* the pc entry point */
+ (double) 0.0 , /* ticks in this routine */
+ (double) 0.0 , /* cumulative ticks in children */
+ (long) 0 , /* how many times called */
+ (long) 0 , /* how many calls to self */
+ (int) 0 , /* index in the graph list */
+ (int) 0 , /* graph call chain top-sort order */
+ (int) 0 , /* internal number of cycle on */
+ (struct nl *) &indirectchild , /* pointer to head of cycle */
+ (struct nl *) 0 , /* pointer to next member of cycle */
+ (arctype *) 0 , /* list of caller arcs */
+ (arctype *) 0 /* list of callee arcs */
+ };
+
+operandenum
+operandmode( modep )
+ struct modebyte *modep;
+{
+ long usesreg = modep -> regfield;
+
+ switch ( modep -> modefield ) {
+ case 0:
+ case 1:
+ case 2:
+ case 3:
+ return literal;
+ case 4:
+ return indexed;
+ case 5:
+ return reg;
+ case 6:
+ return regdef;
+ case 7:
+ return autodec;
+ case 8:
+ return ( usesreg != PC ? autoinc : immediate );
+ case 9:
+ return ( usesreg != PC ? autoincdef : absolute );
+ case 10:
+ return ( usesreg != PC ? bytedisp : byterel );
+ case 11:
+ return ( usesreg != PC ? bytedispdef : bytereldef );
+ case 12:
+ return ( usesreg != PC ? worddisp : wordrel );
+ case 13:
+ return ( usesreg != PC ? worddispdef : wordreldef );
+ case 14:
+ return ( usesreg != PC ? longdisp : longrel );
+ case 15:
+ return ( usesreg != PC ? longdispdef : longreldef );
+ }
+ /* NOTREACHED */
+}
+
+char *
+operandname( mode )
+ operandenum mode;
+{
+
+ switch ( mode ) {
+ case literal:
+ return "literal";
+ case indexed:
+ return "indexed";
+ case reg:
+ return "register";
+ case regdef:
+ return "register deferred";
+ case autodec:
+ return "autodecrement";
+ case autoinc:
+ return "autoincrement";
+ case autoincdef:
+ return "autoincrement deferred";
+ case bytedisp:
+ return "byte displacement";
+ case bytedispdef:
+ return "byte displacement deferred";
+ case byterel:
+ return "byte relative";
+ case bytereldef:
+ return "byte relative deferred";
+ case worddisp:
+ return "word displacement";
+ case worddispdef:
+ return "word displacement deferred";
+ case wordrel:
+ return "word relative";
+ case wordreldef:
+ return "word relative deferred";
+ case immediate:
+ return "immediate";
+ case absolute:
+ return "absolute";
+ case longdisp:
+ return "long displacement";
+ case longdispdef:
+ return "long displacement deferred";
+ case longrel:
+ return "long relative";
+ case longreldef:
+ return "long relative deferred";
+ }
+ /* NOTREACHED */
+}
+
+long
+operandlength( modep )
+ struct modebyte *modep;
+{
+
+ switch ( operandmode( modep ) ) {
+ case literal:
+ case reg:
+ case regdef:
+ case autodec:
+ case autoinc:
+ case autoincdef:
+ return 1;
+ case bytedisp:
+ case bytedispdef:
+ case byterel:
+ case bytereldef:
+ return 2;
+ case worddisp:
+ case worddispdef:
+ case wordrel:
+ case wordreldef:
+ return 3;
+ case immediate:
+ case absolute:
+ case longdisp:
+ case longdispdef:
+ case longrel:
+ case longreldef:
+ return 5;
+ case indexed:
+ return 1+operandlength( (struct modebyte *) ((char *) modep) + 1 );
+ }
+ /* NOTREACHED */
+}
+
+unsigned long
+reladdr( modep )
+ struct modebyte *modep;
+{
+ operandenum mode = operandmode( modep );
+ char *cp;
+ short *sp;
+ long *lp;
+
+ cp = (char *) modep;
+ cp += 1; /* skip over the mode */
+ switch ( mode ) {
+ default:
+ fprintf( stderr , "[reladdr] not relative address\n" );
+ return (unsigned long) modep;
+ case byterel:
+ return (unsigned long) ( cp + sizeof *cp + *cp );
+ case wordrel:
+ sp = (short *) cp;
+ return (unsigned long) ( cp + sizeof *sp + *sp );
+ case longrel:
+ lp = (long *) cp;
+ return (unsigned long) ( cp + sizeof *lp + *lp );
+ }
+}
+
+findcalls( parentp , p_lowpc , p_highpc )
+ nltype *parentp;
+ unsigned long p_lowpc;
+ unsigned long p_highpc;
+{
+ unsigned char *instructp;
+ long length;
+ nltype *childp;
+ operandenum mode;
+ operandenum firstmode;
+ unsigned long destpc;
+
+ if ( textspace == 0 ) {
+ return;
+ }
+ if ( p_lowpc < s_lowpc ) {
+ p_lowpc = s_lowpc;
+ }
+ if ( p_highpc > s_highpc ) {
+ p_highpc = s_highpc;
+ }
+# ifdef DEBUG
+ if ( debug & CALLSDEBUG ) {
+ printf( "[findcalls] %s: 0x%x to 0x%x\n" ,
+ parentp -> name , p_lowpc , p_highpc );
+ }
+# endif DEBUG
+ for ( instructp = textspace + p_lowpc ;
+ instructp < textspace + p_highpc ;
+ instructp += length ) {
+ length = 1;
+ if ( *instructp == CALLS ) {
+ /*
+ * maybe a calls, better check it out.
+ * skip the count of the number of arguments.
+ */
+# ifdef DEBUG
+ if ( debug & CALLSDEBUG ) {
+ printf( "[findcalls]\t0x%x:calls" , instructp - textspace );
+ }
+# endif DEBUG
+ firstmode = operandmode( (struct modebyte *) (instructp+length) );
+ switch ( firstmode ) {
+ case literal:
+ case immediate:
+ break;
+ default:
+ goto botched;
+ }
+ length += operandlength( (struct modebyte *) (instructp+length) );
+ mode = operandmode( (struct modebyte *) ( instructp + length ) );
+# ifdef DEBUG
+ if ( debug & CALLSDEBUG ) {
+ printf( "\tfirst operand is %s", operandname( firstmode ) );
+ printf( "\tsecond operand is %s\n" , operandname( mode ) );
+ }
+# endif DEBUG
+ switch ( mode ) {
+ case regdef:
+ case bytedispdef:
+ case worddispdef:
+ case longdispdef:
+ case bytereldef:
+ case wordreldef:
+ case longreldef:
+ /*
+ * indirect call: call through pointer
+ * either *d(r) as a parameter or local
+ * (r) as a return value
+ * *f as a global pointer
+ * [are there others that we miss?,
+ * e.g. arrays of pointers to functions???]
+ */
+ addarc( parentp , &indirectchild , (long) 0 );
+ length += operandlength(
+ (struct modebyte *) ( instructp + length ) );
+ continue;
+ case byterel:
+ case wordrel:
+ case longrel:
+ /*
+ * regular pc relative addressing
+ * check that this is the address of
+ * a function.
+ */
+ destpc = reladdr( (struct modebyte *) (instructp+length) )
+ - (unsigned long) textspace;
+ if ( destpc >= s_lowpc && destpc <= s_highpc ) {
+ childp = nllookup( destpc );
+# ifdef DEBUG
+ if ( debug & CALLSDEBUG ) {
+ printf( "[findcalls]\tdestpc 0x%x" , destpc );
+ printf( " childp->name %s" , childp -> name );
+ printf( " childp->value 0x%x\n" ,
+ childp -> value );
+ }
+# endif DEBUG
+ if ( childp -> value == destpc ) {
+ /*
+ * a hit
+ */
+ addarc( parentp , childp , (long) 0 );
+ length += operandlength( (struct modebyte *)
+ ( instructp + length ) );
+ continue;
+ }
+ goto botched;
+ }
+ /*
+ * else:
+ * it looked like a calls,
+ * but it wasn't to anywhere.
+ */
+ goto botched;
+ default:
+ botched:
+ /*
+ * something funny going on.
+ */
+# ifdef DEBUG
+ if ( debug & CALLSDEBUG ) {
+ printf( "[findcalls]\tbut it's a botch\n" );
+ }
+# endif DEBUG
+ length = 1;
+ continue;
+ }
+ }
+ }
+}
projects / unix-history / commitdiff