aboutsummaryrefslogtreecommitdiff
path: root/gprof/tahoe.c
diff options
context:
space:
mode:
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/tahoe.c
downloadgdb-252b5132c753830d5fd56823373aed85f2a0db63.zip
gdb-252b5132c753830d5fd56823373aed85f2a0db63.tar.gz
gdb-252b5132c753830d5fd56823373aed85f2a0db63.tar.bz2
19990502 sourceware importbinu_ss_19990502
Diffstat (limited to 'gprof/tahoe.c')
-rw-r--r--gprof/tahoe.c345
1 files changed, 345 insertions, 0 deletions
diff --git a/gprof/tahoe.c b/gprof/tahoe.c
new file mode 100644
index 0000000..d133c17
--- /dev/null
+++ b/gprof/tahoe.c
@@ -0,0 +1,345 @@
+/*
+ * 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"
+
+ /*
+ * opcode of the `callf' instruction
+ */
+#define CALLF 0xfe
+
+ /*
+ * register for pc relative addressing
+ */
+#define PC 0xf
+
+enum tahoe_opermodes
+ {
+ literal, indexed, reg, regdef, autodec, autoinc, autoincdef,
+ bytedisp, bytedispdef, worddisp, worddispdef, longdisp, longdispdef,
+ immediate, absolute, byterel, bytereldef, wordrel, wordreldef,
+ longrel, longreldef
+ };
+typedef enum tahoe_opermodes tahoe_operandenum;
+
+/*
+ * A symbol to be the child of indirect callf:
+ */
+Sym indirectchild;
+
+
+tahoe_operandenum
+tahoe_operandmode (modep)
+ unsigned char *modep;
+{
+ long usesreg = ((long) *modep) & 0xf;
+
+ switch (((long) *modep) >> 4)
+ {
+ 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 != 0xe ? 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 ();
+}
+
+char *
+tahoe_operandname (mode)
+ tahoe_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 ();
+}
+
+long
+tahoe_operandlength (modep)
+ unsigned char *modep;
+{
+
+ switch (tahoe_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 + tahoe_operandlength (modep + 1);
+ }
+ /* NOTREACHED */
+ abort ();
+}
+
+bfd_vma
+tahoe_reladdr (modep)
+ char *modep;
+{
+ tahoe_operandenum mode = tahoe_operandmode (modep);
+ char *cp;
+ short *sp;
+ long *lp;
+ int i;
+ long value = 0;
+
+ cp = modep;
+ ++cp; /* skip over the mode */
+ switch (mode)
+ {
+ default:
+ fprintf (stderr, "[reladdr] not relative address\n");
+ return (bfd_vma) modep;
+ case byterel:
+ return (bfd_vma) (cp + sizeof *cp + *cp);
+ case wordrel:
+ for (i = 0; (size_t) i < sizeof *sp; i++)
+ value = (value << 8) + (cp[i] & 0xff);
+ return (bfd_vma) (cp + sizeof *sp + value);
+ case longrel:
+ for (i = 0; (size_t) i < sizeof *lp; i++)
+ value = (value << 8) + (cp[i] & 0xff);
+ return (bfd_vma) (cp + sizeof *lp + value);
+ }
+}
+
+void
+tahoe_find_call (parent, p_lowpc, p_highpc)
+ Sym *parent;
+ bfd_vma p_lowpc;
+ bfd_vma p_highpc;
+{
+ unsigned char *instructp;
+ long length;
+ Sym *child;
+ tahoe_operandenum mode;
+ tahoe_operandenum firstmode;
+ bfd_vma destpc;
+ static bool 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, p_lowpc, p_highpc));
+ for (instructp = (unsigned char *) core_text_space + p_lowpc;
+ instructp < (unsigned char *) core_text_space + p_highpc;
+ instructp += length)
+ {
+ length = 1;
+ if (*instructp == CALLF)
+ {
+ /*
+ * maybe a callf, better check it out.
+ * skip the count of the number of arguments.
+ */
+ DBG (CALLDEBUG, printf ("[findcall]\t0x%x:callf",
+ instructp - (unsigned char *) core_text_space));
+ firstmode = tahoe_operandmode (instructp + length);
+ switch (firstmode)
+ {
+ case literal:
+ case immediate:
+ break;
+ default:
+ goto botched;
+ }
+ length += tahoe_operandlength (instructp + length);
+ mode = tahoe_operandmode (instructp + length);
+ DBG (CALLDEBUG,
+ printf ("\tfirst operand is %s", tahoe_operandname (firstmode));
+ printf ("\tsecond operand is %s\n", tahoe_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 += tahoe_operandlength (instructp + length);
+ continue;
+ case byterel:
+ case wordrel:
+ case longrel:
+ /*
+ * regular pc relative addressing
+ * check that this is the address of
+ * a function.
+ */
+ destpc = tahoe_reladdr (instructp + length)
+ - (bfd_vma) core_text_space;
+ if (destpc >= s_lowpc && destpc <= s_highpc)
+ {
+ child = sym_lookup (&symtab, destpc);
+ DBG (CALLDEBUG,
+ printf ("[findcall]\tdestpc 0x%lx", destpc);
+ printf (" child->name %s", child->name);
+ printf (" child->addr 0x%lx\n", child->addr);
+ );
+ if (child->addr == destpc)
+ {
+ /*
+ * a hit
+ */
+ arc_add (parent, child, (unsigned long) 0);
+ length += tahoe_operandlength (instructp + length);
+ continue;
+ }
+ goto botched;
+ }
+ /*
+ * else:
+ * it looked like a callf,
+ * 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;
+ }
+ }
+ }
+}