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authorRichard Henderson <rth@redhat.com>1999-05-03 07:29:11 +0000
committerRichard Henderson <rth@redhat.com>1999-05-03 07:29:11 +0000
commit252b5132c753830d5fd56823373aed85f2a0db63 (patch)
tree1af963bfd8d3e55167b81def4207f175eaff3a56 /gprof/i386.c
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19990502 sourceware importbinu_ss_19990502
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diff --git a/gprof/i386.c b/gprof/i386.c
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+/*
+ * 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.
+ */
+#include "gprof.h"
+#include "cg_arcs.h"
+#include "corefile.h"
+#include "hist.h"
+#include "symtab.h"
+
+
+int
+DEFUN (i386_iscall, (ip), unsigned char *ip)
+{
+ if (*ip == 0xe8)
+ return 1;
+ return 0;
+}
+
+
+void
+i386_find_call (parent, p_lowpc, p_highpc)
+ Sym *parent;
+ bfd_vma p_lowpc;
+ bfd_vma p_highpc;
+{
+ unsigned char *instructp;
+ Sym *child;
+ bfd_vma destpc, delta;
+
+ if (core_text_space == 0)
+ {
+ return;
+ }
+ if (p_lowpc < s_lowpc)
+ {
+ p_lowpc = s_lowpc;
+ }
+ if (p_highpc > s_highpc)
+ {
+ p_highpc = s_highpc;
+ }
+ DBG (CALLDEBUG, printf ("[findcall] %s: 0x%lx to 0x%lx\n",
+ parent->name, p_lowpc, p_highpc));
+
+ delta = (bfd_vma) core_text_space - core_text_sect->vma;
+
+ for (instructp = (unsigned char *) (p_lowpc + delta);
+ instructp < (unsigned char *) (p_highpc + delta);
+ instructp ++)
+ {
+ if (i386_iscall (instructp))
+ {
+ DBG (CALLDEBUG,
+ printf ("[findcall]\t0x%x:call",
+ instructp - (unsigned char *) delta));
+ /*
+ * regular pc relative addressing
+ * check that this is the address of
+ * a function.
+ */
+
+ destpc = ((bfd_vma) bfd_get_32 (core_bfd, instructp + 1)
+ + (bfd_vma) instructp - (bfd_vma) delta + 5);
+ if (destpc >= s_lowpc && destpc <= s_highpc)
+ {
+ child = sym_lookup (&symtab, destpc);
+ if (child && child->addr == destpc)
+ {
+ /*
+ * a hit
+ */
+ DBG (CALLDEBUG,
+ printf ("\tdestpc 0x%lx (%s)\n", destpc, child->name));
+ arc_add (parent, child, (unsigned long) 0);
+ instructp += 4; /* call is a 5 byte instruction */
+ continue;
+ }
+ }
+ /*
+ * else:
+ * it looked like a callf, but it:
+ * a) wasn't actually a callf, or
+ * b) didn't point to a known function in the symtab, or
+ * c) something funny is going on.
+ */
+ DBG (CALLDEBUG, printf ("\tbut it's a botch\n"));
+ }
+ }
+}