449 lines
11 KiB
C++
Executable File
449 lines
11 KiB
C++
Executable File
/////////////////////////////////////////////////////////////////////////
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// $Id: symbols.cc,v 1.12 2008-06-16 17:09:52 sshwarts Exp $
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/////////////////////////////////////////////////////////////////////////
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//
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// Copyright (C) 2001 MandrakeSoft S.A.
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//
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// MandrakeSoft S.A.
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// 43, rue d'Aboukir
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// 75002 Paris - France
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// http://www.linux-mandrake.com/
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// http://www.mandrakesoft.com/
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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/////////////////////////////////////////////////////////////////////////
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#include "bochs.h"
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#include "cpu/cpu.h"
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#if BX_DEBUGGER
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#if !((BX_HAVE_HASH_MAP || BX_HAVE_HASH_MAP_H) && (BX_HAVE_SET || BX_HAVE_SET_H))
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static char *BX_HAVE_HASH_MAP_ERR = "context not implemented because BX_HAVE_HASH_MAP=0\n";
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char* bx_dbg_symbolic_address(Bit32u context, Bit32u eip, Bit32u base)
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{
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static bx_bool first = true;
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if (first) {
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dbg_printf(BX_HAVE_HASH_MAP_ERR);
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first = false;
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}
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return "unk. ctxt";
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}
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char* bx_dbg_symbolic_address_16bit(Bit32u eip, Bit32u cs)
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{
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// just prints an error anyway
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return bx_dbg_symbolic_address (0,0,0);
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}
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int bx_dbg_symbol_command(char* filename, bx_bool global, Bit32u offset)
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{
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dbg_printf(BX_HAVE_HASH_MAP_ERR);
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return -1;
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}
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void bx_dbg_info_symbols_command(char *Symbol)
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{
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dbg_printf(BX_HAVE_HASH_MAP_ERR);
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}
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int bx_dbg_lbreakpoint_symbol_command(char *Symbol)
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{
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dbg_printf(BX_HAVE_HASH_MAP_ERR);
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return -1;
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}
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Bit32u bx_dbg_get_symbol_value(char *Symbol)
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{
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return 0;
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}
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char* bx_dbg_disasm_symbolic_address(Bit32u eip, Bit32u base)
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{
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return 0;
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}
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#else /* if BX_HAVE_HASH_MAP == 1 */
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/* Haven't figured out how to port this code to OSF1 cxx compiler.
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Until a more portable solution is found, at least make it easy
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to disable the template code: just set BX_HAVE_HASH_MAP=0
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in config.h */
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#if BX_HAVE_HASH_MAP
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#include <hash_map>
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#elif BX_HAVE_HASH_MAP_H
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#include <hash_map.h>
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#endif
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#if BX_HAVE_SET
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#include <set>
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#elif BX_HAVE_SET_H
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#include <set.h>
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#endif
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using namespace std;
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#ifdef __GNUC__
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using namespace __gnu_cxx;
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#endif
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struct symbol_entry_t
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{
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symbol_entry_t (Bit32u _start = 0, char* _name = 0)
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{
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start = _start;
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name = _name;
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}
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char* name;
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Bit32u start;
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};
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struct lt_symbol_entry_t
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{
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bool operator()(const symbol_entry_t* s1, const symbol_entry_t* s2) const
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{
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return s1->start < s2->start;
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}
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};
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struct lt_rsymbol_entry_t
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{
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bool operator()(const symbol_entry_t* s1, const symbol_entry_t* s2) const
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{
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return strcoll(s1->name, s2->name) < 0;
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}
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};
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struct context_t
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{
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typedef set<symbol_entry_t*,lt_symbol_entry_t> sym_set_t;
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typedef set<symbol_entry_t*,lt_rsymbol_entry_t> rsym_set_t;
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context_t (Bit32u);
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~context_t();
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static context_t* get_context(Bit32u);
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symbol_entry_t* get_symbol_entry(Bit32u);
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symbol_entry_t* get_symbol_entry(const char *Symbol) const;
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void add_symbol(symbol_entry_t*);
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const sym_set_t* get_all_symbols() const {return syms;}
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const rsym_set_t* get_all_rsymbols() const {return rsyms;}
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private:
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static hash_map<int,context_t*>* map;
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// Forvard references (find name by address)
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sym_set_t* syms;
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// Reverse references (find address by name)
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rsym_set_t* rsyms;
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Bit32u id;
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};
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hash_map<int,context_t*>* context_t::map = new hash_map<int,context_t*>;
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context_t::context_t (Bit32u _id)
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{
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id = _id;
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syms = new sym_set_t;
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rsyms = new rsym_set_t;
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(*map)[id] = this;
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}
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context_t::~context_t()
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{
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if(syms) {
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sym_set_t::iterator iter;
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for(iter=syms->begin();iter!=syms->end();++iter)
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if(*iter)
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delete *iter;
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}
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if(rsyms) {
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rsym_set_t::iterator iter;
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for(iter=rsyms->begin();iter!=rsyms->end();++iter)
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if(*iter)
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delete *iter;
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}
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}
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context_t* context_t::get_context(Bit32u i)
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{
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return (*map)[i];
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}
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symbol_entry_t* context_t::get_symbol_entry(Bit32u ip)
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{
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symbol_entry_t probe;
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probe.start = ip;
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// find the first symbol whose address is greater than ip.
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if (syms->empty ()) return 0;
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sym_set_t::iterator iter = syms->upper_bound(&probe);
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if (iter == syms->end()) { // No symbol found
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return 0;
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}
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return *(--iter);
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}
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symbol_entry_t* context_t::get_symbol_entry(const char *Symbol) const
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{
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symbol_entry_t probe;
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probe.name=(char *)Symbol;
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if (rsyms->empty())
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return 0;
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rsym_set_t::const_iterator iter;
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iter=rsyms->find(&probe);
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if(iter==rsyms->end()) // No symbol found
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return 0;
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return *iter;
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}
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void context_t::add_symbol(symbol_entry_t* sym)
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{
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syms->insert(sym);
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rsyms->insert(sym);
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}
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Bit32u bx_dbg_get_symbol_value(char *Symbol)
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{
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context_t* cntx = context_t::get_context(0);
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if(!cntx) // Context not found
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return 0;
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if (Symbol[0]=='\"') Symbol++;
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int len = strlen(Symbol);
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if (Symbol[len - 1] == '\"') Symbol[len - 1] = '\0';
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symbol_entry_t* sym=cntx->get_symbol_entry(Symbol);
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if(!sym) // Symbol not found
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return 0;
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return sym->start;
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}
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char* bx_dbg_symbolic_address(Bit32u context, Bit32u eip, Bit32u base)
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{
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static char buf[80];
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#if 0
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// bbd: I don't see why we shouldn't allow symbol lookups on
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// segments with a nonzero base. I need to trace user
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// processes in Linux, which have a base of 0xc0000000.
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if (base != 0) {
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snprintf (buf, 80, "non-zero base");
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return buf;
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}
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#endif
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// Look up this context
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context_t* cntx = context_t::get_context(context);
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if (!cntx) {
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// Try global context
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cntx = context_t::get_context(0);
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if (!cntx) {
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snprintf (buf, 80, "unk. ctxt");
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return buf;
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}
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}
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// full linear address not only eip (for nonzero based segments)
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symbol_entry_t* entr = cntx->get_symbol_entry(base+eip);
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if (!entr) {
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snprintf (buf, 80, "no symbol");
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return buf;
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}
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snprintf (buf, 80, "%s+%x", entr->name, (base+eip) - entr->start);
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return buf;
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}
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char* bx_dbg_disasm_symbolic_address(Bit32u eip, Bit32u base)
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{
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static char buf[80];
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// Try global context
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context_t* cntx = context_t::get_context(0);
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if (!cntx) {
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return 0;
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}
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// full linear address not only eip (for nonzero based segments)
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symbol_entry_t* entr = cntx->get_symbol_entry(base+eip);
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if (!entr) {
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return 0;
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}
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snprintf (buf, 80, "%s+%x", entr->name, (base+eip) - entr->start);
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return buf;
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}
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char* bx_dbg_symbolic_address_16bit(Bit32u eip, Bit32u cs)
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{
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// in 16-bit code, the segment selector and offset are combined into a
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// 20-bit linear address = (segment selector<<4) + offset.
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eip &= 0xffff;
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cs &= 0xffff;
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return bx_dbg_symbolic_address (0, eip+(cs<<4), 0);
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}
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int bx_dbg_symbol_command(char* filename, bx_bool global, Bit32u offset)
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{
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if (filename[0] == '"')
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filename++;
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int len = strlen(filename);
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if (filename[len - 1] == '"')
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filename[len - 1] = '\0';
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// Install symbols in correct context (page table)
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// The file format should be
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// address symbol (example '00002afe _StartLoseNT')
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context_t* cntx = (global) ? context_t::get_context(0)
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: context_t::get_context((BX_CPU(dbg_cpu)->cr3) >> 12);
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if (!cntx) {
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cntx = (global) ? new context_t(0)
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: new context_t((BX_CPU(dbg_cpu)->cr3) >> 12);
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}
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FILE* fp = fopen(filename, "rt"); // 't' is need for win32, unixes simply ignore it
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if (!fp) {
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dbg_printf ("Could not open symbol file '%s'\n", filename);
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return -1;
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}
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// C++/C# symbols can be long
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char buf[512];
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int line_num = 1;
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while (fgets(buf, sizeof(buf), fp)) {
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// handle end of line (before error messages)
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len = strlen(buf);
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bool whole_line = (buf[len - 1] == '\n');
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if (whole_line)
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buf[len - 1] = 0;
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// parse
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char* sym_name;
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Bit32u addr = strtoul(buf, &sym_name, 16);
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if (!isspace(*sym_name)) {
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if (*sym_name == 0)
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dbg_printf("%s:%d: missing symbol name\n", filename, line_num);
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else
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dbg_printf("%s:%d: syntax error near '%s'\n", filename, line_num, sym_name);
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return -1;
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}
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++sym_name;
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symbol_entry_t* sym = new symbol_entry_t(addr + offset, strdup(sym_name));
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cntx->add_symbol(sym);
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// skip the rest of long line
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while (!whole_line) {
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if (!fgets(buf, sizeof(buf), fp))
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break;
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// actually, last line can end without newline, but then
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// we'll just break at the next iteration because of EOF
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whole_line = (buf[strlen(buf)-1] == '\n');
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}
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++line_num;
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}
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return 0;
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}
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// chack if s1 is prefix of s2
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static bool bx_dbg_strprefix(const char *s1, const char *s2)
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{
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if(!s1 || !s2)
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return false;
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size_t len=strlen(s1);
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if(len>strlen(s2))
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return false;
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return strncmp(s1, s2, len)==0;
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}
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void bx_dbg_info_symbols_command(char *Symbol)
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{
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context_t* cntx = context_t::get_context(0);
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if(!cntx) {
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dbg_printf ("Global context not available\n");
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return;
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}
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if(Symbol) {
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const context_t::rsym_set_t* rsyms;
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rsyms=cntx->get_all_rsymbols();
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if (rsyms->empty ()) {
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dbg_printf ("Symbols not loaded\n");
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return;
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}
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// remove leading and trailing quotas
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if (Symbol[0]=='\"') Symbol++;
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int len = strlen(Symbol);
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if (Symbol[len - 1] == '\"') Symbol[len - 1] = '\0';
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symbol_entry_t probe;
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probe.name=Symbol;
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context_t::rsym_set_t::const_iterator iter;
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iter=rsyms->lower_bound(&probe);
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if(iter==rsyms->end() || !bx_dbg_strprefix(Symbol, (*iter)->name))
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dbg_printf ("No symbols found\n");
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else {
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for(;iter!=rsyms->end() && bx_dbg_strprefix(Symbol, (*iter)->name);++iter) {
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dbg_printf ("%08x: %s\n", (*iter)->start, (*iter)->name);
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}
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}
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}
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else {
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const context_t::sym_set_t* syms;
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syms=cntx->get_all_symbols();
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if (syms->empty ()) {
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dbg_printf ("Symbols not loaded\n");
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return;
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}
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context_t::sym_set_t::const_iterator iter;
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for(iter = syms->begin();iter!=syms->end();++iter) {
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dbg_printf ("%08x: %s\n", (*iter)->start, (*iter)->name);
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}
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}
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}
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int bx_dbg_lbreakpoint_symbol_command(char *Symbol)
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{
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context_t* cntx = context_t::get_context(0);
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if(!cntx) {
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dbg_printf ("Global context not available\n");
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return -1;
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}
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if (Symbol[0]=='\"') Symbol++;
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int len = strlen(Symbol);
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if (Symbol[len - 1] == '\"') Symbol[len - 1] = '\0';
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const symbol_entry_t* sym=cntx->get_symbol_entry(Symbol);
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if(sym)
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return bx_dbg_lbreakpoint_command(bkRegular, sym->start);
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dbg_printf ("Symbol not found\n");
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return -1;
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}
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#endif
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#endif
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