| /* |
| * 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, (unsigned long) p_lowpc, |
| (unsigned long) 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", |
| (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; |
| } |
| } |
| } |
| } |