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-rw-r--r--gprof/vax.c364
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diff --git a/gprof/vax.c b/gprof/vax.c
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+/*
+ * Copyright (c) 1983, 1993, 2001
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. 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 BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+#include "gprof.h"
+#include "search_list.h"
+#include "source.h"
+#include "symtab.h"
+#include "cg_arcs.h"
+#include "corefile.h"
+#include "hist.h"
+
+ /*
+ * opcode of the `calls' instruction
+ */
+#define CALLS 0xfb
+
+ /*
+ * register for pc relative addressing
+ */
+#define PC 0xf
+
+enum opermodes
+ {
+ literal, indexed, reg, regdef, autodec, autoinc, autoincdef,
+ bytedisp, bytedispdef, worddisp, worddispdef, longdisp, longdispdef,
+ immediate, absolute, byterel, bytereldef, wordrel, wordreldef,
+ longrel, longreldef
+ };
+typedef enum opermodes operandenum;
+
+#if 0
+/* Here to document only. We can't use this when cross compiling as
+ the bitfield layout might not be the same as native. */
+struct modebyte
+ {
+ unsigned int regfield:4;
+ unsigned int modefield:4;
+ };
+#endif
+
+/*
+ * A symbol to be the child of indirect calls:
+ */
+static Sym indirectchild;
+
+static operandenum vax_operandmode PARAMS ((unsigned char *));
+static char *vax_operandname PARAMS ((operandenum));
+static long vax_operandlength PARAMS ((unsigned char *));
+static bfd_signed_vma vax_offset PARAMS ((unsigned char *));
+void vax_find_call PARAMS ((Sym *, bfd_vma, bfd_vma));
+
+static operandenum
+vax_operandmode (modep)
+ unsigned char *modep;
+{
+ int usesreg = *modep & 0xf;
+
+ switch ((*modep >> 4) & 0xf)
+ {
+ 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 */
+ abort ();
+}
+
+static char *
+vax_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 */
+ abort ();
+}
+
+static long
+vax_operandlength (modep)
+ unsigned char *modep;
+{
+
+ switch (vax_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 + vax_operandlength (modep + 1);
+ }
+ /* NOTREACHED */
+ abort ();
+}
+
+static bfd_signed_vma
+vax_offset (modep)
+ unsigned char *modep;
+{
+ operandenum mode = vax_operandmode (modep);
+
+ ++modep; /* skip over the mode */
+ switch (mode)
+ {
+ default:
+ fprintf (stderr, "[reladdr] not relative address\n");
+ return 0;
+ case byterel:
+ return 1 + bfd_get_signed_8 (core_bfd, modep);
+ case wordrel:
+ return 2 + bfd_get_signed_16 (core_bfd, modep);
+ case longrel:
+ return 4 + bfd_get_signed_32 (core_bfd, modep);
+ }
+}
+
+
+void
+vax_find_call (parent, p_lowpc, p_highpc)
+ Sym *parent;
+ bfd_vma p_lowpc;
+ bfd_vma p_highpc;
+{
+ unsigned char *instructp;
+ long length;
+ Sym *child;
+ operandenum mode;
+ operandenum firstmode;
+ bfd_vma pc, destpc;
+ static bfd_boolean inited = FALSE;
+
+ if (!inited)
+ {
+ inited = TRUE;
+ sym_init (&indirectchild);
+ indirectchild.cg.prop.fract = 1.0;
+ indirectchild.cg.cyc.head = &indirectchild;
+ }
+
+ 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, (unsigned long) p_lowpc,
+ (unsigned long) p_highpc));
+ for (pc = p_lowpc; pc < p_highpc; pc += length)
+ {
+ length = 1;
+ instructp = ((unsigned char *) core_text_space
+ + pc - core_text_sect->vma);
+ if ((*instructp & 0xff) == CALLS)
+ {
+ /*
+ * maybe a calls, better check it out.
+ * skip the count of the number of arguments.
+ */
+ DBG (CALLDEBUG,
+ printf ("[findcall]\t0x%lx:calls", (unsigned long) pc));
+ firstmode = vax_operandmode (instructp + length);
+ switch (firstmode)
+ {
+ case literal:
+ case immediate:
+ break;
+ default:
+ goto botched;
+ }
+ length += vax_operandlength (instructp + length);
+ mode = vax_operandmode (instructp + length);
+ DBG (CALLDEBUG,
+ printf ("\tfirst operand is %s", vax_operandname (firstmode));
+ printf ("\tsecond operand is %s\n", vax_operandname (mode)));
+ 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???]
+ */
+ arc_add (parent, &indirectchild, (unsigned long) 0);
+ length += vax_operandlength (instructp + length);
+ continue;
+ case byterel:
+ case wordrel:
+ case longrel:
+ /*
+ * regular pc relative addressing
+ * check that this is the address of
+ * a function.
+ */
+ destpc = pc + vax_offset (instructp + length);
+ if (destpc >= s_lowpc && destpc <= s_highpc)
+ {
+ child = sym_lookup (&symtab, destpc);
+ DBG (CALLDEBUG,
+ printf ("[findcall]\tdestpc 0x%lx",
+ (unsigned long) destpc);
+ printf (" child->name %s", child->name);
+ printf (" child->addr 0x%lx\n",
+ (unsigned long) child->addr);
+ );
+ if (child->addr == destpc)
+ {
+ /*
+ * a hit
+ */
+ arc_add (parent, child, (unsigned long) 0);
+ length += vax_operandlength (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.
+ */
+ DBG (CALLDEBUG, printf ("[findcall]\tbut it's a botch\n"));
+ length = 1;
+ continue;
+ }
+ }
+ }
+}
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