351 lines
8.5 KiB
C
351 lines
8.5 KiB
C
/*
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* Copyright (c) 1983 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that: (1) source distributions retain this entire copyright
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* notice and comment, and (2) distributions including binaries display
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* the following acknowledgement: ``This product includes software
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* developed by the University of California, Berkeley and its contributors''
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* in the documentation or other materials provided with the distribution
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* and in all advertising materials mentioning features or use of this
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* software. Neither the name of the University nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#include "gprof.h"
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#include "cg_arcs.h"
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#include "corefile.h"
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#include "hist.h"
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#include "symtab.h"
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/*
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* opcode of the `calls' instruction
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*/
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#define CALLS 0xfb
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/*
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* register for pc relative addressing
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*/
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#define PC 0xf
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enum opermodes
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{
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literal, indexed, reg, regdef, autodec, autoinc, autoincdef,
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bytedisp, bytedispdef, worddisp, worddispdef, longdisp, longdispdef,
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immediate, absolute, byterel, bytereldef, wordrel, wordreldef,
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longrel, longreldef
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};
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typedef enum opermodes operandenum;
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struct modebyte
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{
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unsigned int regfield:4;
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unsigned int modefield:4;
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};
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/*
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* A symbol to be the child of indirect calls:
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*/
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Sym indirectchild;
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static operandenum
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vax_operandmode (modep)
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struct modebyte *modep;
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{
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long usesreg = modep->regfield;
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switch (modep->modefield)
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{
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case 0:
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case 1:
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case 2:
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case 3:
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return literal;
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case 4:
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return indexed;
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case 5:
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return reg;
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case 6:
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return regdef;
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case 7:
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return autodec;
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case 8:
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return usesreg != PC ? autoinc : immediate;
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case 9:
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return usesreg != PC ? autoincdef : absolute;
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case 10:
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return usesreg != PC ? bytedisp : byterel;
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case 11:
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return usesreg != PC ? bytedispdef : bytereldef;
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case 12:
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return usesreg != PC ? worddisp : wordrel;
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case 13:
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return usesreg != PC ? worddispdef : wordreldef;
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case 14:
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return usesreg != PC ? longdisp : longrel;
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case 15:
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return usesreg != PC ? longdispdef : longreldef;
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}
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/* NOTREACHED */
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abort ();
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}
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static char *
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vax_operandname (mode)
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operandenum mode;
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{
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switch (mode)
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{
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case literal:
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return "literal";
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case indexed:
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return "indexed";
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case reg:
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return "register";
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case regdef:
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return "register deferred";
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case autodec:
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return "autodecrement";
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case autoinc:
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return "autoincrement";
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case autoincdef:
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return "autoincrement deferred";
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case bytedisp:
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return "byte displacement";
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case bytedispdef:
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return "byte displacement deferred";
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case byterel:
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return "byte relative";
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case bytereldef:
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return "byte relative deferred";
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case worddisp:
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return "word displacement";
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case worddispdef:
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return "word displacement deferred";
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case wordrel:
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return "word relative";
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case wordreldef:
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return "word relative deferred";
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case immediate:
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return "immediate";
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case absolute:
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return "absolute";
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case longdisp:
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return "long displacement";
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case longdispdef:
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return "long displacement deferred";
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case longrel:
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return "long relative";
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case longreldef:
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return "long relative deferred";
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}
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/* NOTREACHED */
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abort ();
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}
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static long
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vax_operandlength (modep)
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struct modebyte *modep;
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{
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switch (vax_operandmode (modep))
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{
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case literal:
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case reg:
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case regdef:
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case autodec:
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case autoinc:
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case autoincdef:
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return 1;
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case bytedisp:
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case bytedispdef:
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case byterel:
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case bytereldef:
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return 2;
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case worddisp:
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case worddispdef:
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case wordrel:
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case wordreldef:
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return 3;
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case immediate:
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case absolute:
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case longdisp:
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case longdispdef:
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case longrel:
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case longreldef:
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return 5;
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case indexed:
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return 1 + vax_operandlength ((struct modebyte *) ((char *) modep) + 1);
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}
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/* NOTREACHED */
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abort ();
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}
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static bfd_vma
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vax_reladdr (modep)
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struct modebyte *modep;
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{
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operandenum mode = vax_operandmode (modep);
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char *cp;
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short *sp;
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long *lp;
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cp = (char *) modep;
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++cp; /* skip over the mode */
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switch (mode)
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{
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default:
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fprintf (stderr, "[reladdr] not relative address\n");
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return (bfd_vma) modep;
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case byterel:
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return (bfd_vma) (cp + sizeof *cp + *cp);
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case wordrel:
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sp = (short *) cp;
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return (bfd_vma) (cp + sizeof *sp + *sp);
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case longrel:
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lp = (long *) cp;
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return (bfd_vma) (cp + sizeof *lp + *lp);
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}
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}
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void
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vax_find_call (parent, p_lowpc, p_highpc)
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Sym *parent;
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bfd_vma p_lowpc;
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bfd_vma p_highpc;
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{
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unsigned char *instructp;
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long length;
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Sym *child;
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operandenum mode;
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operandenum firstmode;
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bfd_vma destpc;
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static bool inited = FALSE;
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if (!inited)
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{
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inited = TRUE;
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sym_init (&indirectchild);
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indirectchild.cg.prop.fract = 1.0;
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indirectchild.cg.cyc.head = &indirectchild;
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}
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if (core_text_space == 0)
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{
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return;
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}
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if (p_lowpc < s_lowpc)
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{
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p_lowpc = s_lowpc;
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}
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if (p_highpc > s_highpc)
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{
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p_highpc = s_highpc;
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}
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DBG (CALLDEBUG, printf ("[findcall] %s: 0x%lx to 0x%lx\n",
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parent->name, p_lowpc, p_highpc));
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for (instructp = (unsigned char *) core_text_space + p_lowpc;
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instructp < (unsigned char *) core_text_space + p_highpc;
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instructp += length)
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{
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length = 1;
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if (*instructp == CALLS)
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{
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/*
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* maybe a calls, better check it out.
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* skip the count of the number of arguments.
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*/
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DBG (CALLDEBUG,
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printf ("[findcall]\t0x%x:calls",
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instructp - (unsigned char *) core_text_space));
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firstmode = vax_operandmode ((struct modebyte *) (instructp + length));
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switch (firstmode)
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{
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case literal:
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case immediate:
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break;
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default:
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goto botched;
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}
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length += vax_operandlength ((struct modebyte *) (instructp + length));
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mode = vax_operandmode ((struct modebyte *) (instructp + length));
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DBG (CALLDEBUG,
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printf ("\tfirst operand is %s", vax_operandname (firstmode));
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printf ("\tsecond operand is %s\n", vax_operandname (mode)));
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switch (mode)
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{
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case regdef:
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case bytedispdef:
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case worddispdef:
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case longdispdef:
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case bytereldef:
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case wordreldef:
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case longreldef:
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/*
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* indirect call: call through pointer
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* either *d(r) as a parameter or local
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* (r) as a return value
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* *f as a global pointer
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* [are there others that we miss?,
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* e.g. arrays of pointers to functions???]
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*/
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arc_add (parent, &indirectchild, (unsigned long) 0);
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length += vax_operandlength (
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(struct modebyte *) (instructp + length));
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continue;
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case byterel:
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case wordrel:
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case longrel:
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/*
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* regular pc relative addressing
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* check that this is the address of
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* a function.
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*/
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destpc = vax_reladdr ((struct modebyte *) (instructp + length))
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- (bfd_vma) core_text_space;
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if (destpc >= s_lowpc && destpc <= s_highpc)
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{
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child = sym_lookup (&symtab, destpc);
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DBG (CALLDEBUG,
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printf ("[findcall]\tdestpc 0x%lx", destpc);
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printf (" child->name %s", child->name);
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printf (" child->addr 0x%lx\n", child->addr);
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);
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if (child->addr == destpc)
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{
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/*
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* a hit
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*/
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arc_add (parent, child, (unsigned long) 0);
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length += vax_operandlength ((struct modebyte *)
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(instructp + length));
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continue;
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}
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goto botched;
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}
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/*
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* else:
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* it looked like a calls,
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* but it wasn't to anywhere.
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*/
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goto botched;
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default:
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botched:
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/*
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* something funny going on.
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*/
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DBG (CALLDEBUG, printf ("[findcall]\tbut it's a botch\n"));
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length = 1;
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continue;
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}
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}
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}
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}
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