int
fn_disassemble_xed(xed_syntax_enum_t syntax,
char* buf,
int buflen,
xed_decoded_inst_t* xedd,
xed_uint64_t runtime_instruction_address,
void* caller_data)
{
/* the caller_data is for symbolic disam */
char buffer[XED_TMP_BUF_LEN];
int blen = buflen;
int ok = xed_format_context(syntax, xedd,
buffer, XED_TMP_BUF_LEN,
runtime_instruction_address, caller_data);
if(ok)
blen = xed_strncpy(buf, buffer, buflen);
else
{
blen = buflen;
blen = xed_strncpy(buf, "Error disassembling ", blen);
blen = xed_strncat(buf, xed_syntax_enum_t2str(syntax), blen);
blen = xed_strncat(buf, " syntax.", blen);
}
return blen;
}
void xed_dot_graph_add_instruction(
xed_dot_graph_supp_t* gg,
xed_decoded_inst_t* xedd,
xed_uint64_t runtime_instr_addr,
void* caller_data)
{
/*
make a new node
for each operand:
if read:
make edge from src node for that reg to the new node
for each operand:
if write:
install this node as the writer
what about partial writes?
what about register nesting?
*/
char disasm_str[XED_DOT_TMP_BUF_LEN];
char* p = 0;
size_t alen = 0;
int ok;
xed_dot_node_t* n = 0;
xed_uint32_t remaining_buffer_bytes = XED_DOT_TMP_BUF_LEN;
// put addr on separate line in node label
#if defined(XED_WINDOWS)
ok = sprintf_s(disasm_str,
XED_DOT_TMP_BUF_LEN,
XED_FMT_LX "\\n",
runtime_instr_addr);
#else
ok = sprintf(disasm_str,
XED_FMT_LX "\\n",
runtime_instr_addr);
#endif
assert(ok > 0);
alen = strlen(disasm_str);
p = disasm_str + alen;
remaining_buffer_bytes -= XED_CAST(xed_uint32_t, alen);
ok = xed_format_context(gg->syntax,
xedd,
p,
remaining_buffer_bytes,
runtime_instr_addr,
caller_data);
if (!ok) {
(void)xed_strncpy(disasm_str,"???", XED_DOT_TMP_BUF_LEN);
}
n = xed_dot_node(gg->g, disasm_str);
add_read_operands(gg,xedd,n);
add_write_operands(gg,xedd,n);
}
static char* append3(const char* s1, const char* s2, const char* s3) {
xed_uint_t n = 1;
char* p = 0;
if (s1) n += xed_strlen(s1);
if (s2) n += xed_strlen(s2);
if (s3) n += xed_strlen(s3);
p = (char*) malloc(sizeof(char)*n);
if (s1) n=xed_strncpy(p,s1,n);
if (s2) n=xed_strncat(p,s2,n);
if (s3) n=xed_strncat(p,s3,n);
return p;
}
bool dbg_help_client_t::get_symbol(DWORD64 address, char* symbol_name,
int sym_name_buflen, DWORD64* offset)
{
DWORD64 displacement;
ULONG64 n = (sizeof(SYMBOL_INFO) +
sym_name_buflen*sizeof(TCHAR) +
sizeof(ULONG64) - 1) / sizeof(ULONG64);
ULONG64* buffer = new ULONG64[n];
PSYMBOL_INFO pSymbol = (PSYMBOL_INFO)buffer;
pSymbol->SizeOfStruct = sizeof(SYMBOL_INFO);
pSymbol->MaxNameLen = sym_name_buflen;
if (SymFromAddr(hProcess, address, &displacement, pSymbol)) {
if (offset)
*offset = displacement;
if (offset || displacement == 0) {
//printf("Name is [%s]\n", pSymbol->Name);
xed_strncpy(symbol_name, pSymbol->Name, sym_name_buflen);
// force a null. WINDOWS doesn't have strlcpy()
symbol_name[sym_name_buflen-1] = 0;
delete [] buffer;
return 0;
}
else {
/* not at the beginning of a symbol and no offset was supplied */
/* printf("Ignoring. Not at the beginning of a symbol [%s]\n",
* pSymbol->Name); */
delete [] buffer;
return 1;
}
}
else {
error = GetLastError();
printf("SymFromAddr returned error : %d 0x%x for address %llx\n",
error, error, address);
delete [] buffer;
return 1;
}
}
xed_uint_t disas_decode_encode_binary(const xed_state_t* dstate,
const xed_uint8_t* decode_text_binary,
const unsigned int bytes,
xed_decoded_inst_t* xedd,
xed_uint64_t runtime_address)
{
// decode then encode
unsigned int retval_olen = 0;
// decode it...
xed_bool_t decode_okay = disas_decode_binary(dstate, decode_text_binary,
bytes, xedd,
runtime_address);
if(decode_okay)
{
xed_error_enum_t encode_okay;
xed_uint64_t t1, t2;
unsigned int enc_olen, ilen = XED_MAX_INSTRUCTION_BYTES;
xed_uint8_t array[XED_MAX_INSTRUCTION_BYTES];
// they are basically the same now
xed_encoder_request_t* enc_req = xedd;
// convert decode structure to proper encode structure
xed_encoder_request_init_from_decode(xedd);
// encode it again...
t1 = xed_get_time();
encode_okay = xed_encode(enc_req, array, ilen, &enc_olen);
t2 = xed_get_time();
if(encode_okay != XED_ERROR_NONE)
{
if(CLIENT_VERBOSE)
{
char buf[XED_TMP_BUF_LEN];
char buf2[XED_TMP_BUF_LEN];
int blen = XED_TMP_BUF_LEN;
xed_encode_request_print(enc_req, buf, XED_TMP_BUF_LEN);
blen = xed_strncpy(buf2, "Could not re-encode: ", blen);
blen = xed_strncat(buf2, buf, blen);
blen = xed_strncat(buf2, "\nError code was: ", blen);
blen = xed_strncat(buf2,
xed_error_enum_t2str(encode_okay), blen);
blen = xed_strncat(buf2, "\n", blen);
xedex_dwarn(buf2);
}
}
else
{
retval_olen = enc_olen;
// See if it matched the original...
if(CLIENT_VERBOSE)
{
char buf[XED_HEX_BUFLEN];
xed_uint_t dec_length;
xed_print_hex_line(buf, array, enc_olen, XED_HEX_BUFLEN);
printf("Encodable! %s\n", buf);
xed_decode_stats_reset(&xed_enc_stats, t1, t2);
dec_length = xed_decoded_inst_get_length(xedd);
if((enc_olen != dec_length ||
memcmp(decode_text_binary, array, enc_olen)))
{
char buf2[XED_TMP_BUF_LEN];
char buf3[XED_TMP_BUF_LEN];
printf("Discrepenacy after re-encoding. dec_len= "
XED_FMT_U " ", dec_length);
xed_print_hex_line(buf, decode_text_binary,
dec_length, XED_HEX_BUFLEN);
printf("[%s] ", buf);
printf("enc_olen= " XED_FMT_U "", enc_olen);
xed_print_hex_line(buf, array, enc_olen, XED_HEX_BUFLEN);
printf(" [%s] ", buf);
printf("for instruction: ");
xed_decoded_inst_dump(xedd, buf3, XED_TMP_BUF_LEN);
printf("%s\n", buf3);
printf("vs Encode request: ");
xed_encode_request_print(enc_req, buf2, XED_TMP_BUF_LEN);
printf("%s\n", buf2);
}
else
printf("Identical re-encoding\n");
}
}
}
return retval_olen;
}
