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[/] [open8_urisc/] [trunk/] [gnu/] [binutils/] [gprof/] [tahoe.c] - Rev 144
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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 `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: */ static Sym indirectchild; static tahoe_operandenum tahoe_operandmode (unsigned char *); static char *tahoe_operandname (tahoe_operandenum); static long tahoe_operandlength (unsigned char *); static bfd_signed_vma tahoe_offset (unsigned char *); void tahoe_find_call (Sym *, bfd_vma, bfd_vma); static tahoe_operandenum tahoe_operandmode (unsigned char *modep) { long 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 != 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 (); } static char * tahoe_operandname (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 (); } static long tahoe_operandlength (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 (); } static bfd_signed_vma tahoe_offset (unsigned char *modep) { tahoe_operandenum mode = tahoe_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 tahoe_find_call (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 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; } 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) == CALLF) { /* * maybe a callf, better check it out. * skip the count of the number of arguments. */ DBG (CALLDEBUG, printf ("[findcall]\t0x%lx:callf", (unsigned long) pc)); 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 = pc + tahoe_offset (instructp + length); if (hist_check_address (destpc)) { child = sym_lookup (&symtab, destpc); if (child) { 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 += 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; } } } }
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