| /* |
| * 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; |
| |
| /* *INDENT-OFF* */ |
| /* 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; |
| }; |
| */ |
| /* *INDENT-ON* */ |
| |
| /* |
| * A symbol to be the child of indirect calls: |
| */ |
| static Sym indirectchild; |
| |
| static operandenum vax_operandmode (unsigned char *); |
| static char *vax_operandname (operandenum); |
| static long vax_operandlength (unsigned char *); |
| static bfd_signed_vma vax_offset (unsigned char *); |
| void vax_find_call (Sym *, bfd_vma, bfd_vma); |
| |
| static operandenum |
| vax_operandmode (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 (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 (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 (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 (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 bool 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) |
| { |
| unsigned char *operand; |
| |
| 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)); |
| if (pc - core_text_sect->vma + length >= core_text_sect->size) |
| goto botched; |
| operand = instructp + length; |
| firstmode = vax_operandmode (operand); |
| switch (firstmode) |
| { |
| case literal: |
| case immediate: |
| break; |
| default: |
| goto botched; |
| } |
| length += vax_operandlength (operand); |
| if (pc - core_text_sect->vma + length >= core_text_sect->size) |
| goto botched; |
| operand = instructp + length; |
| mode = vax_operandmode (operand); |
| 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???] |
| */ |
| length += vax_operandlength (operand); |
| if (pc - core_text_sect->vma + length > core_text_sect->size) |
| goto botched; |
| arc_add (parent, &indirectchild, (unsigned long) 0); |
| continue; |
| case byterel: |
| case wordrel: |
| case longrel: |
| /* |
| * regular pc relative addressing |
| * check that this is the address of |
| * a function. |
| */ |
| length += vax_operandlength (operand); |
| if (pc - core_text_sect->vma + length > core_text_sect->size) |
| goto botched; |
| destpc = pc + vax_offset (operand); |
| 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); |
| 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; |
| } |
| } |
| } |
| } |