Bochs/bochs/bx_debug/symbols.cc

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/////////////////////////////////////////////////////////////////////////
// $Id: symbols.cc,v 1.4 2006-03-06 22:02:50 sshwarts Exp $
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/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2001 MandrakeSoft S.A.
//
// MandrakeSoft S.A.
// 43, rue d'Aboukir
// 75002 Paris - France
// http://www.linux-mandrake.com/
// http://www.mandrakesoft.com/
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
/////////////////////////////////////////////////////////////////////////
#include "bochs.h"
#include "cpu/cpu.h"
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#if !((BX_HAVE_HASH_MAP || BX_HAVE_HASH_MAP_H) && (BX_HAVE_SET || BX_HAVE_SET_H))
static char *BX_HAVE_HASH_MAP_ERR = "context not implemented because BX_HAVE_HASH_MAP=0\n";
char* bx_dbg_symbolic_address(Bit32u context, Bit32u eip, Bit32u base)
{
static bx_bool first = true;
if (first) {
dbg_printf(BX_HAVE_HASH_MAP_ERR);
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first = false;
}
return "unk. ctxt";
}
char* bx_dbg_symbolic_address_16bit(Bit32u eip, Bit32u cs)
{
// just prints an error anyway
return bx_dbg_symbolic_address (0,0,0);
}
void bx_dbg_symbol_command(char* filename, bx_bool global, Bit32u offset)
{
dbg_printf(BX_HAVE_HASH_MAP_ERR);
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}
void bx_dbg_info_symbols_command(char *Symbol)
{
dbg_printf(BX_HAVE_HASH_MAP_ERR);
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}
int bx_dbg_lbreakpoint_symbol_command(char *Symbol)
{
dbg_printf(BX_HAVE_HASH_MAP_ERR);
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return -1;
}
Bit32u bx_dbg_get_symbol_value(char *Symbol)
{
return 0;
}
char* bx_dbg_disasm_symbolic_address(Bit32u eip, Bit32u base)
{
return 0;
}
#else /* if BX_HAVE_HASH_MAP == 1 */
/* Haven't figured out how to port this code to OSF1 cxx compiler.
Until a more portable solution is found, at least make it easy
to disable the template code: just set BX_HAVE_HASH_MAP=0
in config.h */
#if BX_HAVE_HASH_MAP
#include <hash_map>
#elif BX_HAVE_HASH_MAP_H
#include <hash_map.h>
#endif
#if BX_HAVE_SET
#include <set>
#elif BX_HAVE_SET_H
#include <set.h>
#endif
using namespace std;
struct symbol_entry_t
{
symbol_entry_t (Bit32u _start = 0, char* _name = 0)
{
start = _start;
name = _name;
}
char* name;
Bit32u start;
};
struct lt_symbol_entry_t
{
bool operator()(const symbol_entry_t* s1, const symbol_entry_t* s2) const
{
return s1->start < s2->start;
}
};
struct lt_rsymbol_entry_t
{
bool operator()(const symbol_entry_t* s1, const symbol_entry_t* s2) const
{
return strcoll(s1->name, s2->name) < 0;
}
};
struct context_t
{
context_t (Bit32u);
~context_t();
static context_t* get_context(Bit32u);
symbol_entry_t* get_symbol_entry(Bit32u);
symbol_entry_t* get_symbol_entry(const char *Symbol) const;
void add_symbol(symbol_entry_t*);
const set<symbol_entry_t*,lt_symbol_entry_t>* get_all_symbols() const {return syms;}
const set<symbol_entry_t*,lt_rsymbol_entry_t>* get_all_rsymbols() const {return rsyms;}
private:
static hash_map<int,context_t*>* map;
// Forvard references (find name by address)
set<symbol_entry_t*,lt_symbol_entry_t>* syms;
// Reverse references (find address by name)
set<symbol_entry_t*,lt_rsymbol_entry_t>* rsyms;
Bit32u id;
};
hash_map<int,context_t*>* context_t::map = new hash_map<int,context_t*>;
context_t::context_t (Bit32u _id)
{
id = _id;
syms = new set<symbol_entry_t*, lt_symbol_entry_t>;
rsyms = new set<symbol_entry_t*, lt_rsymbol_entry_t>;
(*map)[id] = this;
}
context_t::~context_t()
{
set<symbol_entry_t*>::iterator iter;
if(syms) {
for(iter=syms->begin();iter!=syms->end();++iter)
if(*iter)
delete *iter;
}
if(rsyms) {
for(iter=rsyms->begin();iter!=rsyms->end();++iter)
if(*iter)
delete *iter;
}
}
context_t* context_t::get_context(Bit32u i)
{
return (*map)[i];
}
symbol_entry_t* context_t::get_symbol_entry(Bit32u ip)
{
symbol_entry_t probe;
probe.start = ip;
// find the first symbol whose address is greater than ip.
if (syms->empty ()) return 0;
set<symbol_entry_t*>::iterator iter = syms->upper_bound(&probe);
if (iter == syms->end()) { // No symbol found
return 0;
}
return *(--iter);
}
symbol_entry_t* context_t::get_symbol_entry(const char *Symbol) const
{
symbol_entry_t probe;
probe.name=(char *)Symbol;
if (rsyms->empty ())
return 0;
set<symbol_entry_t*>::const_iterator iter;
iter=rsyms->find(&probe);
if(iter==rsyms->end()) // No symbol found
return 0;
return *iter;
}
void context_t::add_symbol(symbol_entry_t* sym)
{
syms->insert(sym);
rsyms->insert(sym);
}
Bit32u bx_dbg_get_symbol_value(char *Symbol)
{
context_t* cntx = context_t::get_context(0);
if(!cntx) // Context not found
return 0;
if (Symbol[0]=='\"') Symbol++;
int len = strlen(Symbol);
if (Symbol[len - 1] == '\"') Symbol[len - 1] = '\0';
symbol_entry_t* sym=cntx->get_symbol_entry(Symbol);
if(!sym) // Symbol not found
return 0;
return sym->start;
}
char* bx_dbg_symbolic_address(Bit32u context, Bit32u eip, Bit32u base)
{
static char buf[80];
#if 0
// bbd: I don't see why we shouldn't allow symbol lookups on
// segments with a nonzero base. I need to trace user
// processes in Linux, which have a base of 0xc0000000.
if (base != 0) {
snprintf (buf, 80, "non-zero base");
return buf;
}
#endif
// Look up this context
context_t* cntx = context_t::get_context(context);
if (!cntx) {
// Try global context
cntx = context_t::get_context(0);
if (!cntx) {
snprintf (buf, 80, "unk. ctxt");
return buf;
}
}
// full linear address not only eip (for nonzero based segments)
symbol_entry_t* entr = cntx->get_symbol_entry(base+eip);
if (!entr) {
snprintf (buf, 80, "no symbol");
return buf;
}
snprintf (buf, 80, "%s+%x", entr->name, (base+eip) - entr->start);
return buf;
}
char* bx_dbg_disasm_symbolic_address(Bit32u eip, Bit32u base)
{
static char buf[80];
// Try global context
context_t* cntx = context_t::get_context(0);
if (!cntx) {
return 0;
}
// full linear address not only eip (for nonzero based segments)
symbol_entry_t* entr = cntx->get_symbol_entry(base+eip);
if (!entr) {
return 0;
}
snprintf (buf, 80, "%s+%x", entr->name, (base+eip) - entr->start);
return buf;
}
char* bx_dbg_symbolic_address_16bit(Bit32u eip, Bit32u cs)
{
// in 16-bit code, the segment selector and offset are combined into a
// 20-bit linear address = (segment selector<<4) + offset.
eip &= 0xffff;
cs &= 0xffff;
return bx_dbg_symbolic_address (0, eip+(cs<<4), 0);
}
void bx_dbg_symbol_command(char* filename, bx_bool global, Bit32u offset)
{
if (filename[0] == '"')
filename++;
int len = strlen(filename);
if (filename[len - 1] == '"')
filename[len - 1] = '\0';
// Install symbols in correct context (page table)
// The file format should be
// address symbol (example '00002afe _StartLoseNT')
context_t* cntx = (global) ? context_t::get_context(0)
: context_t::get_context((BX_CPU(dbg_cpu)->cr3) >> 12);
if (!cntx) {
cntx = (global) ? new context_t(0)
: new context_t((BX_CPU(dbg_cpu)->cr3) >> 12);
}
FILE* fp = fopen(filename, "rt"); // 't' is need for win32, unixes simply ignore it
if (!fp) {
dbg_printf ("Could not open symbol file '%s'\n", filename);
return;
}
char buf[200];
while (fgets(buf, 200, fp)) {
// Parse
char* sym_name = buf;
for (int i = 0; i < 200 && buf[i]; i++) {
if (buf[i] == ' ') {
buf[i] = '\0';
sym_name = buf + i + 1;
break;
}
}
if (sym_name == buf) {
dbg_printf ("Syntax error '%s'\n", buf);
break;
}
Bit32u addr = strtoul(buf, 0, 16);
if (sym_name[strlen(sym_name)-1] == '\n')
sym_name[strlen(sym_name)-1] = '\0';
symbol_entry_t* sym = new symbol_entry_t(addr + offset, strdup(sym_name));
cntx->add_symbol(sym);
}
}
// chack if s1 is prefix of s2
static bool bx_dbg_strprefix(const char *s1, const char *s2)
{
if(!s1 || !s2)
return false;
size_t len=strlen(s1);
if(len>strlen(s2))
return false;
return strncmp(s1, s2, len)==0;
}
void bx_dbg_info_symbols_command(char *Symbol)
{
context_t* cntx = context_t::get_context(0);
if(!cntx) {
dbg_printf ("Global context not available\n");
return;
}
if(Symbol) {
const set<symbol_entry_t*,lt_rsymbol_entry_t>* rsyms;
rsyms=cntx->get_all_rsymbols();
if (rsyms->empty ()) {
dbg_printf ("Symbols not loaded\n");
return;
}
// remove leading and trailing quotas
if (Symbol[0]=='\"') Symbol++;
int len = strlen(Symbol);
if (Symbol[len - 1] == '\"') Symbol[len - 1] = '\0';
symbol_entry_t probe;
probe.name=Symbol;
set<symbol_entry_t*>::const_iterator iter;
iter=rsyms->lower_bound(&probe);
if(iter==rsyms->end() || !bx_dbg_strprefix(Symbol, (*iter)->name))
dbg_printf ("No symbols found\n");
else
for(;iter!=rsyms->end() && bx_dbg_strprefix(Symbol, (*iter)->name);++iter) {
dbg_printf ("%08x: %s\n", (*iter)->start, (*iter)->name);
}
}
else {
const set<symbol_entry_t*,lt_symbol_entry_t>* syms;
syms=cntx->get_all_symbols();
if (syms->empty ()) {
dbg_printf ("Symbols not loaded\n");
return;
}
set<symbol_entry_t*>::const_iterator iter;
for(iter = syms->begin();iter!=syms->end();++iter) {
dbg_printf ("%08x: %s\n", (*iter)->start, (*iter)->name);
}
}
}
int bx_dbg_lbreakpoint_symbol_command(char *Symbol)
{
context_t* cntx = context_t::get_context(0);
if(!cntx) {
dbg_printf ("Global context not available\n");
return -1;
}
if (Symbol[0]=='\"') Symbol++;
int len = strlen(Symbol);
if (Symbol[len - 1] == '\"') Symbol[len - 1] = '\0';
const symbol_entry_t* sym=cntx->get_symbol_entry(Symbol);
if(sym)
return bx_dbg_lbreakpoint_command(bkRegular, sym->start);
dbg_printf ("Symbol not found\n");
return -1;
}
#endif