Initial revision

1 files changed, 138 insertions, 0 deletions

diff --git a/gprof/i386.c b/gprof/i386.c
new file mode 100644
index 0000000..cdced1c
--- /dev/null
+++ b/gprof/i386.c
@@ -0,0 +1,138 @@
+/*
+ * Copyright (c) 1983 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that: (1) source distributions retain this entire copyright
+ * notice and comment, and (2) distributions including binaries display
+ * the following acknowledgement:  ``This product includes software
+ * developed by the University of California, Berkeley and its contributors''
+ * in the documentation or other materials provided with the distribution
+ * and in all advertising materials mentioning features or use of this
+ * software. Neither the name of the University nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)tahoe.c	1.5 (Berkeley) 6/1/90";
+#endif /* not lint */
+
+#include	"gprof.h"
+
+    /*
+     *	a namelist entry to be the child of indirect callf
+     */
+nltype	indirectchild = {
+	"(*)" ,				/* the name */
+	(unsigned long) 0 ,		/* the pc entry point */
+	(unsigned long) 0 ,		/* entry point aligned to histogram */
+	(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 */
+	(double) 1.0 ,			/* propagation fraction */
+	(double) 0.0 ,			/* self propagation time */
+	(double) 0.0 ,			/* child propagation time */
+	(bool) 0 ,			/* print flag */
+	(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 */
+    };
+
+int
+iscall (unsigned char *ip) {
+  if (*ip == 0xeb || *ip = 0x9a) 
+    return 1;
+  return 0;
+}
+
+findcall( parentp , p_lowpc , p_highpc )
+    nltype		*parentp;
+    unsigned long	p_lowpc;
+    unsigned long	p_highpc;
+{
+    unsigned char	*instructp;
+    long		length;
+    nltype		*childp;
+    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 & CALLDEBUG ) {
+	    printf( "[findcall] %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 ( iscall (instructp) ) {
+#	    ifdef DEBUG
+	  if ( debug & CALLDEBUG ) {
+	    printf( "[findcall]\t0x%x:callf" , instructp - textspace );
+	  }
+#	    endif DEBUG
+	  length = 4;
+	  /*
+	   *	regular pc relative addressing
+	   *	check that this is the address of 
+	   *	a function.
+	   */
+	  destpc = ( (unsigned long)instructp + 5 
+	    - (unsigned long) textspace;
+	  if ( destpc >= s_lowpc && destpc <= s_highpc ) {
+	    childp = nllookup( destpc );
+#			ifdef DEBUG
+	    if ( debug & CALLDEBUG ) {
+	      printf( "[findcall]\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 += 4;	/* constant lengths */
+	      continue;
+	    }
+	    goto botched;
+	  }
+	  /*
+	   *	else:
+	   *	it looked like a callf,
+	   *	but it wasn't to anywhere.
+	   */
+	botched:
+	  /*
+	   *	something funny going on.
+	   */
+#		    ifdef DEBUG
+	  if ( debug & CALLDEBUG ) {
+	    printf( "[findcall]\tbut it's a botch\n" );
+	  }
+#		    endif DEBUG
+	  length = 1;
+	  continue;
+	}
+      }
+  }