/* Helper routine to avoid code duplication.
*/
static int
_dwarf_get_loclist_header_start(Dwarf_Debug dbg,
Dwarf_Attribute attr,
Dwarf_Unsigned * loclist_offset,
Dwarf_Error * error)
{
int blkres = dwarf_global_formref(attr, loclist_offset, error);
if (blkres != DW_DLV_OK) {
return (blkres);
}
if (!dbg->de_debug_loc.dss_data) {
int secload = _dwarf_load_section(dbg, &dbg->de_debug_loc,error);
if (secload != DW_DLV_OK) {
return secload;
}
if (!dbg->de_debug_loc.dss_size) {
return (DW_DLV_NO_ENTRY);
}
}
{
int fisres = 0;
Dwarf_Unsigned fissoff = 0;
Dwarf_Unsigned size = 0;
fisres = _dwarf_get_fission_addition_die(attr->ar_die, DW_SECT_LOC,
&fissoff, &size,error);
if(fisres != DW_DLV_OK) {
return fisres;
}
*loclist_offset += fissoff;
}
return DW_DLV_OK;
}
static int
get_attributes(Dwarf_Debug dbg,Dwarf_Die die, int level,
struct srcfilesdata *sf, struct attributes *attr)
{
int res;
Dwarf_Error error = 0;
Dwarf_Attribute *attrbuf = 0;
Dwarf_Addr lowpc = 0;
Dwarf_Addr highpc = 0;
Dwarf_Signed attrcount = 0;
Dwarf_Unsigned i;
Dwarf_Unsigned filenum = 0;
Dwarf_Unsigned linenum = 0;
char *filename = 0;
int ret = 1;
res = dwarf_attrlist(die,&attrbuf,&attrcount,&error);
if(res != DW_DLV_OK) {
return ret;
}
for(i = 0; i < attrcount ; ++i) {
Dwarf_Half aform;
res = dwarf_whatattr(attrbuf[i],&aform,&error);
if(res == DW_DLV_OK) {
if(aform == DW_AT_decl_file) {
get_number(attrbuf[i],&filenum);
if((filenum > 0) && (sf->srcfilescount > (filenum-1))) {
filename = sf->srcfiles[filenum-1];
attr->filename = filename;
}
}
if(aform == DW_AT_declaration) {
Dwarf_Unsigned size=0;
get_number(attrbuf[i],&size);
ret =0;
}
if(aform == DW_AT_byte_size) {
attr->size=0;
get_number(attrbuf[i],&attr->size);
}
if(aform == DW_AT_data_member_location) {
attr->member_location=0;
get_number(attrbuf[i],&attr->member_location);
}
if(aform == DW_AT_type) {
attr->type_offset = 0;
dwarf_global_formref(attrbuf[i],&(attr->type_offset),&error);
}
}
dwarf_dealloc(dbg,attrbuf[i],DW_DLA_ATTR);
}
dwarf_dealloc(dbg,attrbuf,DW_DLA_LIST);
return ret;
}
int type_off(Dwarf_Die *die, Dwarf_Off *ref_off, Dwarf_Error *err) {
Dwarf_Attribute type;
int status;
if ((status = dwarf_attr(*die, DW_AT_type, &type, err)) != DW_DLV_OK) {
if (status == DW_DLV_NO_ENTRY) {
fprintf(stderr, "No type information associated with die\n");
} else {
fprintf(stderr, "Error %d in getting type attribute: %s\n", status,
dwarf_errmsg(*err));
}
return status;
}
if ((status = dwarf_global_formref(type, ref_off, err)) != DW_DLV_OK) {
fprintf(stderr, "Error %d in getting type offset: %s\n", status,
dwarf_errmsg(*err));
return status;
}
return DW_DLV_OK;
}
/* Helper routine to avoid code duplication.
*/
static int
_dwarf_get_loclist_header_start(Dwarf_Debug dbg,
Dwarf_Attribute attr,
Dwarf_Unsigned * loclist_offset,
Dwarf_Error * error)
{
int blkres = dwarf_global_formref(attr, loclist_offset, error);
if (blkres != DW_DLV_OK) {
return (blkres);
}
if (!dbg->de_debug_loc.dss_data) {
int secload = _dwarf_load_section(dbg, &dbg->de_debug_loc,error);
if (secload != DW_DLV_OK) {
return secload;
}
if (!dbg->de_debug_loc.dss_size) {
return (DW_DLV_NO_ENTRY);
}
}
return DW_DLV_OK;
}
Dwarf_Off DieHolder::get_ref_from_attr(int attr)
{
Dwarf_Off offset = 0;
Dwarf_Half form = 0;
Dwarf_Error err = NULL;
Dwarf_Attribute attrib = get_attr(attr);
CHECK_DWERR2(attrib == NULL, NULL, "cannot find DIE attribute %d\n", attr);
CHECK_DWERR(dwarf_whatform(attrib, &form, &err), err,
"cannot get form of the DIE attribute %d", attr);
switch(form)
{
case DW_FORM_ref_addr:
CHECK_DWERR(dwarf_global_formref(attrib, &offset, &err), err,
"cannot get global reference address");
break;
case DW_FORM_ref1:
case DW_FORM_ref2:
case DW_FORM_ref4:
case DW_FORM_ref8:
case DW_FORM_ref_udata:
{
Dwarf_Off cu_offset = 0;
Dwarf_Off cu_length = 0;
CHECK_DWERR(dwarf_formref(attrib, &offset, &err), err,
"cannot get reference address");
cu_offset = get_CU_offset_range(&cu_length);
offset += cu_offset;
}
break;
default:
THROW_DWERR("unknown reference form=%d\n", form);
break;
}
return offset;
}
/*
return DW_DLV_OK if ok. else DW_DLV_NO_ENTRY or DW_DLV_ERROR
If err_count_out is non-NULL, this is a special 'check'
call.
*/
int
_dwarf_internal_printlines(Dwarf_Die die, Dwarf_Error * error,
int * err_count_out, int only_line_header)
{
/*
This pointer is used to scan the portion of the .debug_line
section for the current cu. */
Dwarf_Small *line_ptr = 0;
Dwarf_Small *orig_line_ptr = 0;
/*
This points to the last byte of the .debug_line portion for the
current cu. */
Dwarf_Small *line_ptr_end = 0;
/*
Pointer to a DW_AT_stmt_list attribute in case it exists in the
die. */
Dwarf_Attribute stmt_list_attr = 0;
/* Pointer to DW_AT_comp_dir attribute in die. */
Dwarf_Attribute comp_dir_attr = 0;
/* Pointer to name of compilation directory. */
Dwarf_Small *comp_dir = NULL;
/*
Offset into .debug_line specified by a DW_AT_stmt_list
attribute. */
Dwarf_Unsigned line_offset = 0;
struct Line_Table_Prefix_s prefix;
/* These are the state machine state variables. */
Dwarf_Addr address = 0;
Dwarf_Word file = 1;
Dwarf_Word line = 1;
Dwarf_Word column = 0;
Dwarf_Bool is_stmt = false;
Dwarf_Bool basic_block = false;
Dwarf_Bool end_sequence = false;
Dwarf_Bool prologue_end = false;
Dwarf_Bool epilogue_begin = false;
Dwarf_Small isa = 0;
Dwarf_Sword i=0;
/*
This is the current opcode read from the statement program. */
Dwarf_Small opcode=0;
/*
These variables are used to decode leb128 numbers. Leb128_num
holds the decoded number, and leb128_length is its length in
bytes. */
Dwarf_Word leb128_num=0;
Dwarf_Word leb128_length=0;
Dwarf_Sword advance_line=0;
Dwarf_Half attrform = 0;
/*
This is the operand of the latest fixed_advance_pc extended
opcode. */
Dwarf_Half fixed_advance_pc=0;
/* In case there are wierd bytes 'after' the line table
* prologue this lets us print something. This is a gcc
* compiler bug and we expect the bytes count to be 12.
*/
Dwarf_Small* bogus_bytes_ptr = 0;
Dwarf_Unsigned bogus_bytes_count = 0;
/* The Dwarf_Debug this die belongs to. */
Dwarf_Debug dbg=0;
int resattr = DW_DLV_ERROR;
int lres = DW_DLV_ERROR;
int res = DW_DLV_ERROR;
/* ***** BEGIN CODE ***** */
if (error != NULL) {
*error = NULL;
}
CHECK_DIE(die, DW_DLV_ERROR);
dbg = die->di_cu_context->cc_dbg;
res = _dwarf_load_section(dbg, &dbg->de_debug_line,error);
if (res != DW_DLV_OK) {
return res;
}
resattr = dwarf_attr(die, DW_AT_stmt_list, &stmt_list_attr, error);
if (resattr != DW_DLV_OK) {
return resattr;
}
/* The list of relevant FORMs is small.
DW_FORM_data4, DW_FORM_data8, DW_FORM_sec_offset
*/
lres = dwarf_whatform(stmt_list_attr,&attrform,error);
if (lres != DW_DLV_OK) {
return lres;
}
if (attrform != DW_FORM_data4 && attrform != DW_FORM_data8 &&
attrform != DW_FORM_sec_offset ) {
_dwarf_error(dbg, error, DW_DLE_LINE_OFFSET_BAD);
return (DW_DLV_ERROR);
}
lres = dwarf_global_formref(stmt_list_attr, &line_offset, error);
if (lres != DW_DLV_OK) {
return lres;
}
if (line_offset >= dbg->de_debug_line.dss_size) {
_dwarf_error(dbg, error, DW_DLE_LINE_OFFSET_BAD);
return (DW_DLV_ERROR);
}
orig_line_ptr = dbg->de_debug_line.dss_data;
line_ptr = dbg->de_debug_line.dss_data + line_offset;
dwarf_dealloc(dbg, stmt_list_attr, DW_DLA_ATTR);
/*
If die has DW_AT_comp_dir attribute, get the string that names
the compilation directory. */
resattr = dwarf_attr(die, DW_AT_comp_dir, &comp_dir_attr, error);
if (resattr == DW_DLV_ERROR) {
return resattr;
}
if (resattr == DW_DLV_OK) {
int cres = DW_DLV_ERROR;
char *cdir = 0;
cres = dwarf_formstring(comp_dir_attr, &cdir, error);
if (cres == DW_DLV_ERROR) {
return cres;
} else if (cres == DW_DLV_OK) {
comp_dir = (Dwarf_Small *) cdir;
}
}
if (resattr == DW_DLV_OK) {
dwarf_dealloc(dbg, comp_dir_attr, DW_DLA_ATTR);
}
dwarf_init_line_table_prefix(&prefix);
{
Dwarf_Small *line_ptr_out = 0;
int dres = dwarf_read_line_table_prefix(dbg,
line_ptr,dbg->de_debug_line.dss_size - line_offset,
&line_ptr_out,
&prefix,
&bogus_bytes_ptr,
&bogus_bytes_count,
error,
err_count_out);
if (dres == DW_DLV_ERROR) {
dwarf_free_line_table_prefix(&prefix);
return dres;
}
if (dres == DW_DLV_NO_ENTRY) {
dwarf_free_line_table_prefix(&prefix);
return dres;
}
line_ptr_end = prefix.pf_line_ptr_end;
line_ptr = line_ptr_out;
}
if(only_line_header) {
/* Just checking for header errors, nothing more here.*/
dwarf_free_line_table_prefix(&prefix);
return DW_DLV_OK;
}
printf("total line info length %ld bytes, "
"line offset 0x%" DW_PR_DUx " %" DW_PR_DSd "\n",
(long) prefix.pf_total_length,
(Dwarf_Unsigned) line_offset,
(Dwarf_Signed) line_offset);
printf("line table version %d\n",(int) prefix.pf_version);
printf("line table length field length %d prologue length %d\n",
(int)prefix.pf_length_field_length,
(int)prefix.pf_prologue_length);
printf("compilation_directory %s\n",
comp_dir ? ((char *) comp_dir) : "");
printf(" min instruction length %d\n",
(int) prefix.pf_minimum_instruction_length);
printf(" default is stmt %d\n", (int)
prefix.pf_default_is_stmt);
printf(" line base %d\n", (int)
prefix.pf_line_base);
printf(" line_range %d\n", (int)
prefix.pf_line_range);
printf(" opcode base %d\n", (int)
prefix.pf_opcode_base);
printf(" standard opcode count %d\n", (int)
prefix.pf_std_op_count);
for (i = 1; i < prefix.pf_opcode_base; i++) {
printf(" opcode[%2d] length %d\n", (int) i,
(int) prefix.pf_opcode_length_table[i - 1]);
}
printf(" include directories count %d\n", (int)
prefix.pf_include_directories_count);
for (i = 0; i < prefix.pf_include_directories_count; ++i) {
printf(" include dir[%d] %s\n",
(int) i, prefix.pf_include_directories[i]);
}
printf(" files count %d\n", (int)
prefix.pf_files_count);
for (i = 0; i < prefix.pf_files_count; ++i) {
struct Line_Table_File_Entry_s *lfile =
prefix.pf_line_table_file_entries + i;
Dwarf_Unsigned tlm2 = lfile->lte_last_modification_time;
Dwarf_Unsigned di = lfile->lte_directory_index;
Dwarf_Unsigned fl = lfile->lte_length_of_file;
printf(" file[%d] %s (file-number: %d) \n",
(int) i, (char *) lfile->lte_filename,
(int)(i+1));
printf(" dir index %d\n", (int) di);
{
time_t tt = (time_t) tlm2;
printf(" last time 0x%x %s", /* ctime supplies
newline */
(unsigned) tlm2, ctime(&tt));
}
printf(" file length %ld 0x%lx\n",
(long) fl, (unsigned long) fl);
}
{
Dwarf_Unsigned offset = 0;
if(bogus_bytes_count > 0) {
Dwarf_Unsigned wcount = bogus_bytes_count;
Dwarf_Unsigned boffset = bogus_bytes_ptr - orig_line_ptr;
printf("*** DWARF CHECK: the line table prologue header_length "
" is %" DW_PR_DUu " too high, we pretend it is smaller."
"Section offset: %" DW_PR_DUu " (0x%" DW_PR_DUx ") ***\n",
wcount, boffset,boffset);
*err_count_out += 1;
}
offset = line_ptr - orig_line_ptr;
printf(" statement prog offset in section: %" DW_PR_DUu " 0x%" DW_PR_DUx "\n",
offset, offset);
}
/* Initialize the part of the state machine dependent on the
prefix. */
is_stmt = prefix.pf_default_is_stmt;
print_line_header();
/* Start of statement program. */
while (line_ptr < line_ptr_end) {
int type = 0;
printf(" [0x%06" DW_PR_DSx "] ",
(Dwarf_Signed) (line_ptr - orig_line_ptr));
opcode = *(Dwarf_Small *) line_ptr;
line_ptr++;
/* 'type' is the output */
WHAT_IS_OPCODE(type, opcode, prefix.pf_opcode_base,
prefix.pf_opcode_length_table, line_ptr,
prefix.pf_std_op_count);
if (type == LOP_DISCARD) {
int oc;
int opcnt = prefix.pf_opcode_length_table[opcode];
printf("*** DWARF CHECK: DISCARD standard opcode %d "
"with %d operands: "
"not understood.", opcode, opcnt);
*err_count_out += 1;
for (oc = 0; oc < opcnt; oc++) {
/*
* Read and discard operands we don't
* understand.
* Arbitrary choice of unsigned read.
* Signed read would work as well.
*/
Dwarf_Unsigned utmp2;
DECODE_LEB128_UWORD(line_ptr, utmp2);
printf(" %" DW_PR_DUu " (0x%" DW_PR_DUx ")",
(Dwarf_Unsigned) utmp2,
(Dwarf_Unsigned) utmp2);
}
printf("***\n");
/* do nothing, necessary ops done */
} else if (type == LOP_SPECIAL) {
/* This op code is a special op in the object, no matter
that it might fall into the standard op range in this
compile Thatis, these are special opcodes between
special_opcode_base and MAX_LINE_OP_CODE. (including
special_opcode_base and MAX_LINE_OP_CODE) */
char special[50];
unsigned origop = opcode;
opcode = opcode - prefix.pf_opcode_base;
address = address + prefix.pf_minimum_instruction_length *
(opcode / prefix.pf_line_range);
line =
line + prefix.pf_line_base +
opcode % prefix.pf_line_range;
sprintf(special, "Specialop %3u", origop);
print_line_detail(special,
opcode, address, (int) file, line, column,
is_stmt, basic_block, end_sequence,
prologue_end, epilogue_begin, isa);
basic_block = false;
} else if (type == LOP_STANDARD) {
switch (opcode) {
case DW_LNS_copy:{
print_line_detail("DW_LNS_copy",
opcode, address, file, line,
column, is_stmt, basic_block,
end_sequence, prologue_end,
epilogue_begin, isa);
basic_block = false;
break;
}
case DW_LNS_advance_pc:{
Dwarf_Unsigned utmp2;
DECODE_LEB128_UWORD(line_ptr, utmp2);
printf("DW_LNS_advance_pc val %" DW_PR_DSd " 0x%" DW_PR_DUx "\n",
(Dwarf_Signed) (Dwarf_Word) utmp2,
(Dwarf_Unsigned) (Dwarf_Word) utmp2);
leb128_num = (Dwarf_Word) utmp2;
address =
address +
prefix.pf_minimum_instruction_length *
leb128_num;
break;
}
case DW_LNS_advance_line:{
Dwarf_Signed stmp;
DECODE_LEB128_SWORD(line_ptr, stmp);
advance_line = (Dwarf_Sword) stmp;
printf("DW_LNS_advance_line val %" DW_PR_DSd " 0x%" DW_PR_DSx "\n",
(Dwarf_Signed) advance_line,
(Dwarf_Signed) advance_line);
line = line + advance_line;
break;
}
case DW_LNS_set_file:{
Dwarf_Unsigned utmp2;
DECODE_LEB128_UWORD(line_ptr, utmp2);
file = (Dwarf_Word) utmp2;
printf("DW_LNS_set_file %ld\n", (long) file);
break;
}
case DW_LNS_set_column:{
Dwarf_Unsigned utmp2;
DECODE_LEB128_UWORD(line_ptr, utmp2);
column = (Dwarf_Word) utmp2;
printf("DW_LNS_set_column val %" DW_PR_DSd " 0x%" DW_PR_DSx "\n",
(Dwarf_Signed) column, (Dwarf_Signed) column);
break;
}
case DW_LNS_negate_stmt:{
is_stmt = !is_stmt;
printf("DW_LNS_negate_stmt\n");
break;
}
case DW_LNS_set_basic_block:{
printf("DW_LNS_set_basic_block\n");
basic_block = true;
break;
}
case DW_LNS_const_add_pc:{
opcode = MAX_LINE_OP_CODE - prefix.pf_opcode_base;
address =
address +
prefix.pf_minimum_instruction_length * (opcode /
prefix.
pf_line_range);
printf("DW_LNS_const_add_pc new address 0x%" DW_PR_DSx "\n",
(Dwarf_Signed) address);
break;
}
case DW_LNS_fixed_advance_pc:{
READ_UNALIGNED(dbg, fixed_advance_pc, Dwarf_Half,
line_ptr, sizeof(Dwarf_Half));
line_ptr += sizeof(Dwarf_Half);
address = address + fixed_advance_pc;
printf("DW_LNS_fixed_advance_pc val %" DW_PR_DSd
" 0x%" DW_PR_DSx " new address 0x%" DW_PR_DSx "\n",
(Dwarf_Signed) fixed_advance_pc,
(Dwarf_Signed) fixed_advance_pc,
(Dwarf_Signed) address);
break;
}
case DW_LNS_set_prologue_end:{
prologue_end = true;
printf("DW_LNS_set_prologue_end set true.\n");
break;
}
/* New in DWARF3 */
case DW_LNS_set_epilogue_begin:{
epilogue_begin = true;
printf("DW_LNS_set_epilogue_begin set true.\n");
break;
}
/* New in DWARF3 */
case DW_LNS_set_isa:{
Dwarf_Unsigned utmp2;
DECODE_LEB128_UWORD(line_ptr, utmp2);
isa = utmp2;
printf("DW_LNS_set_isa new value 0x%" DW_PR_DUx ".\n",
(Dwarf_Unsigned) utmp2);
if (isa != utmp2) {
/* The value of the isa did not fit in our
local so we record it wrong. declare an
error. */
dwarf_free_line_table_prefix(&prefix);
_dwarf_error(dbg, error,
DW_DLE_LINE_NUM_OPERANDS_BAD);
return (DW_DLV_ERROR);
}
break;
}
}
} else if (type == LOP_EXTENDED) {
Dwarf_Unsigned utmp3 = 0;
Dwarf_Word instr_length = 0;
Dwarf_Small ext_opcode = 0;
DECODE_LEB128_UWORD(line_ptr, utmp3);
instr_length = (Dwarf_Word) utmp3;
ext_opcode = *(Dwarf_Small *) line_ptr;
line_ptr++;
switch (ext_opcode) {
case DW_LNE_end_sequence:{
end_sequence = true;
print_line_detail("DW_LNE_end_sequence extended",
opcode, address, file, line,
column, is_stmt, basic_block,
end_sequence, prologue_end,
epilogue_begin, isa);
address = 0;
file = 1;
line = 1;
column = 0;
is_stmt = prefix.pf_default_is_stmt;
basic_block = false;
end_sequence = false;
prologue_end = false;
epilogue_begin = false;
break;
}
case DW_LNE_set_address:{
{
READ_UNALIGNED(dbg, address, Dwarf_Addr,
line_ptr,
die->di_cu_context->cc_address_size);
line_ptr += die->di_cu_context->cc_address_size;
printf("DW_LNE_set_address address 0x%" DW_PR_DUx "\n",
(Dwarf_Unsigned) address);
}
break;
}
case DW_LNE_define_file:{
Dwarf_Unsigned di = 0;
Dwarf_Unsigned tlm = 0;
Dwarf_Unsigned fl = 0;
Dwarf_Small *fn = (Dwarf_Small *) line_ptr;
line_ptr = line_ptr + strlen((char *) line_ptr) + 1;
di = _dwarf_decode_u_leb128(line_ptr,
&leb128_length);
line_ptr = line_ptr + leb128_length;
tlm = _dwarf_decode_u_leb128(line_ptr,
&leb128_length);
line_ptr = line_ptr + leb128_length;
fl = _dwarf_decode_u_leb128(line_ptr,
&leb128_length);
line_ptr = line_ptr + leb128_length;
printf("DW_LNE_define_file %s \n", fn);
printf(" dir index %d\n", (int) di);
{
time_t tt3 = (time_t) tlm;
/* ctime supplies newline */
printf(" last time 0x%x %s",
(unsigned) tlm, ctime(&tt3));
}
printf(" file length %ld 0x%lx\n",
(long) fl, (unsigned long) fl);
break;
}
default:{
/* This is an extended op code we do not know about,
other than we know now many bytes it is
(and the op code and the bytes of operand). */
Dwarf_Unsigned remaining_bytes = instr_length -1;
if(instr_length < 1 || remaining_bytes > DW_LNE_LEN_MAX) {
dwarf_free_line_table_prefix(&prefix);
_dwarf_error(dbg, error,
DW_DLE_LINE_EXT_OPCODE_BAD);
return (DW_DLV_ERROR);
}
printf("DW_LNE extended op 0x%x ",ext_opcode);
printf("Bytecount: " DW_PR_DUu , instr_length);
if(remaining_bytes > 0) {
printf(" linedata: 0x");
while (remaining_bytes > 0) {
printf("%02x",(unsigned char)(*(line_ptr)));
line_ptr++;
remaining_bytes--;
}
}
printf("\n");
}
break;
}
}
}
dwarf_free_line_table_prefix(&prefix);
return (DW_DLV_OK);
}
/* return DW_DLV_OK if ok. else DW_DLV_NO_ENTRY or DW_DLV_ERROR
If err_count_out is non-NULL, this is a special 'check'
call. */
static int
_dwarf_internal_printlines(Dwarf_Die die,
Dwarf_Error * error,
int * err_count_out,
int only_line_header)
{
/* This pointer is used to scan the portion of the .debug_line
section for the current cu. */
Dwarf_Small *line_ptr = 0;
Dwarf_Small *orig_line_ptr = 0;
/* Pointer to a DW_AT_stmt_list attribute in case it exists in the
die. */
Dwarf_Attribute stmt_list_attr = 0;
/* Pointer to DW_AT_comp_dir attribute in die. */
Dwarf_Attribute comp_dir_attr = 0;
/* Pointer to name of compilation directory. */
Dwarf_Small *comp_dir = NULL;
/* Offset into .debug_line specified by a DW_AT_stmt_list
attribute. */
Dwarf_Unsigned line_offset = 0;
Dwarf_Sword i=0;
Dwarf_Word u=0;
/* These variables are used to decode leb128 numbers. Leb128_num
holds the decoded number, and leb128_length is its length in
bytes. */
Dwarf_Half attrform = 0;
/* In case there are wierd bytes 'after' the line table
prologue this lets us print something. This is a gcc
compiler bug and we expect the bytes count to be 12. */
Dwarf_Small* bogus_bytes_ptr = 0;
Dwarf_Unsigned bogus_bytes_count = 0;
Dwarf_Half address_size = 0;
Dwarf_Unsigned fission_offset = 0;
/* The Dwarf_Debug this die belongs to. */
Dwarf_Debug dbg=0;
Dwarf_CU_Context cu_context = 0;
Dwarf_Line_Context line_context = 0;
int resattr = DW_DLV_ERROR;
int lres = DW_DLV_ERROR;
int res = DW_DLV_ERROR;
Dwarf_Small *line_ptr_actuals = 0;
Dwarf_Small *line_ptr_end = 0;
Dwarf_Small *section_start = 0;
/* ***** BEGIN CODE ***** */
if (error != NULL) {
*error = NULL;
}
CHECK_DIE(die, DW_DLV_ERROR);
cu_context = die->di_cu_context;
dbg = cu_context->cc_dbg;
res = _dwarf_load_section(dbg, &dbg->de_debug_line,error);
if (res != DW_DLV_OK) {
return res;
}
if (!dbg->de_debug_line.dss_size) {
return (DW_DLV_NO_ENTRY);
}
address_size = _dwarf_get_address_size(dbg, die);
resattr = dwarf_attr(die, DW_AT_stmt_list, &stmt_list_attr, error);
if (resattr != DW_DLV_OK) {
return resattr;
}
/* The list of relevant FORMs is small.
DW_FORM_data4, DW_FORM_data8, DW_FORM_sec_offset
*/
lres = dwarf_whatform(stmt_list_attr,&attrform,error);
if (lres != DW_DLV_OK) {
return lres;
}
if (attrform != DW_FORM_data4 && attrform != DW_FORM_data8 &&
attrform != DW_FORM_sec_offset ) {
_dwarf_error(dbg, error, DW_DLE_LINE_OFFSET_BAD);
return (DW_DLV_ERROR);
}
lres = dwarf_global_formref(stmt_list_attr, &line_offset, error);
if (lres != DW_DLV_OK) {
return lres;
}
if (line_offset >= dbg->de_debug_line.dss_size) {
_dwarf_error(dbg, error, DW_DLE_LINE_OFFSET_BAD);
return (DW_DLV_ERROR);
}
section_start = dbg->de_debug_line.dss_data;
{
Dwarf_Unsigned fission_size = 0;
int resfis = _dwarf_get_fission_addition_die(die, DW_SECT_LINE,
&fission_offset,&fission_size,error);
if(resfis != DW_DLV_OK) {
return resfis;
}
}
orig_line_ptr = section_start + line_offset + fission_offset;
line_ptr = orig_line_ptr;
dwarf_dealloc(dbg, stmt_list_attr, DW_DLA_ATTR);
/* If die has DW_AT_comp_dir attribute, get the string that names
the compilation directory. */
resattr = dwarf_attr(die, DW_AT_comp_dir, &comp_dir_attr, error);
if (resattr == DW_DLV_ERROR) {
return resattr;
}
if (resattr == DW_DLV_OK) {
int cres = DW_DLV_ERROR;
char *cdir = 0;
cres = dwarf_formstring(comp_dir_attr, &cdir, error);
if (cres == DW_DLV_ERROR) {
return cres;
} else if (cres == DW_DLV_OK) {
comp_dir = (Dwarf_Small *) cdir;
}
}
if (resattr == DW_DLV_OK) {
dwarf_dealloc(dbg, comp_dir_attr, DW_DLA_ATTR);
}
line_context = (Dwarf_Line_Context)
_dwarf_get_alloc(dbg, DW_DLA_LINE_CONTEXT, 1);
if (line_context == NULL) {
_dwarf_error(dbg, error, DW_DLE_ALLOC_FAIL);
return (DW_DLV_ERROR);
}
{
Dwarf_Small *newlinep = 0;
int dres = _dwarf_read_line_table_header(dbg,
cu_context,
section_start,
line_ptr,
dbg->de_debug_line.dss_size,
&newlinep,
line_context,
&bogus_bytes_ptr,
&bogus_bytes_count,
error,
err_count_out);
if (dres == DW_DLV_ERROR) {
dwarf_srclines_dealloc_b(line_context);
return dres;
}
if (dres == DW_DLV_NO_ENTRY) {
dwarf_srclines_dealloc_b(line_context);
return dres;
}
line_ptr_end = line_context->lc_line_ptr_end;
line_ptr = newlinep;
if (line_context->lc_actuals_table_offset > 0) {
line_ptr_actuals = line_context->lc_line_prologue_start +
line_context->lc_actuals_table_offset;
}
}
line_context->lc_compilation_directory = comp_dir;
if (only_line_header) {
/* Just checking for header errors, nothing more here.*/
dwarf_srclines_dealloc_b(line_context);
return DW_DLV_OK;
}
dwarf_printf(dbg,
"total line info length %ld bytes,"
" line offset 0x%" DW_PR_XZEROS DW_PR_DUx
" %" DW_PR_DUu "\n",
(long) line_context->lc_total_length,
line_context->lc_section_offset,
line_context->lc_section_offset);
if (line_context->lc_version_number <= DW_LINE_VERSION5) {
dwarf_printf(dbg,
"line table version %d\n",(int) line_context->lc_version_number);
} else {
dwarf_printf(dbg,
"line table version 0x%x\n",(int) line_context->lc_version_number);
}
dwarf_printf(dbg,
"line table length field length %d prologue length %d\n",
(int)line_context->lc_length_field_length,
(int)line_context->lc_prologue_length);
dwarf_printf(dbg,
"compilation_directory %s\n",
comp_dir ? ((char *) comp_dir) : "");
dwarf_printf(dbg,
" min instruction length %d\n",
(int) line_context->lc_minimum_instruction_length);
if (line_context->lc_version_number == EXPERIMENTAL_LINE_TABLES_VERSION) {
dwarf_printf(dbg, " actuals table offset "
"0x%" DW_PR_XZEROS DW_PR_DUx
" logicals table offset "
"0x%" DW_PR_XZEROS DW_PR_DUx "\n",
line_context->lc_actuals_table_offset,
line_context->lc_logicals_table_offset);
}
if (line_context->lc_version_number == DW_LINE_VERSION5) {
dwarf_printf(dbg,
" segment selector size %d\n",
(int) line_context->lc_segment_selector_size);
dwarf_printf(dbg,
" address size %d\n",
(int) line_context->lc_address_size);
}
dwarf_printf(dbg,
" default is stmt %d\n",(int)line_context->lc_default_is_stmt);
dwarf_printf(dbg,
" line base %d\n",(int)line_context->lc_line_base);
dwarf_printf(dbg,
" line_range %d\n",(int)line_context->lc_line_range);
dwarf_printf(dbg,
" opcode base %d\n",(int)line_context->lc_opcode_base);
dwarf_printf(dbg,
" standard opcode count %d\n",(int)line_context->lc_std_op_count);
for (i = 1; i < line_context->lc_opcode_base; i++) {
dwarf_printf(dbg,
" opcode[%2d] length %d\n", (int) i,
(int) line_context->lc_opcode_length_table[i - 1]);
}
dwarf_printf(dbg,
" include directories count %d\n",
(int) line_context->lc_include_directories_count);
for (u = 0; u < line_context->lc_include_directories_count; ++u) {
dwarf_printf(dbg,
" include dir[%u] %s\n",
(int) u, line_context->lc_include_directories[u]);
}
dwarf_printf(dbg,
" files count %d\n",
(int) line_context->lc_file_entry_count);
if (line_context->lc_file_entry_count) {
Dwarf_File_Entry fe = line_context->lc_file_entries;
Dwarf_File_Entry fe2 = fe;
unsigned fiu = 0;
for (fiu = 0 ; fe2 ; fe2 = fe->fi_next,++fiu ) {
Dwarf_Unsigned tlm2 = 0;
Dwarf_Unsigned di = 0;
Dwarf_Unsigned fl = 0;
fe = fe2;
tlm2 = fe->fi_time_last_mod;
di = fe->fi_dir_index;
fl = fe->fi_file_length;
dwarf_printf(dbg,
" file[%u] %s (file-number: %u) \n",
(unsigned) fiu, (char *) fe->fi_file_name,
(unsigned)(fiu+1));
dwarf_printf(dbg,
" dir index %d\n", (int) di);
{
time_t tt = (time_t) tlm2;
/* ctime supplies newline */
dwarf_printf(dbg,
" last time 0x%x %s",
(unsigned) tlm2, ctime(&tt));
}
dwarf_printf(dbg,
" file length %ld 0x%lx\n",
(long) fl, (unsigned long) fl);
}
}
if (line_context->lc_version_number == EXPERIMENTAL_LINE_TABLES_VERSION) {
/* Print the subprograms list. */
Dwarf_Unsigned count = line_context->lc_subprogs_count;
Dwarf_Unsigned exu = 0;
Dwarf_Subprog_Entry sub = line_context->lc_subprogs;
dwarf_printf(dbg," subprograms count"
" %" DW_PR_DUu "\n",count);
if (count > 0) {
dwarf_printf(dbg," indx file line name\n");
}
for (exu = 0 ; exu < count ; exu++,sub++) {
dwarf_printf(dbg," [%2" DW_PR_DUu "] %4" DW_PR_DUu
" %4" DW_PR_DUu " %s\n",
exu+1,
sub->ds_decl_file,
sub->ds_decl_line,
sub->ds_subprog_name);
}
}
{
Dwarf_Unsigned offset = 0;
if (bogus_bytes_count > 0) {
Dwarf_Unsigned wcount = bogus_bytes_count;
Dwarf_Unsigned boffset = bogus_bytes_ptr - section_start;
dwarf_printf(dbg,
"*** DWARF CHECK: the line table prologue header_length "
" is %" DW_PR_DUu " too high, we pretend it is smaller."
"Section offset: 0x%" DW_PR_XZEROS DW_PR_DUx
" (%" DW_PR_DUu ") ***\n",
wcount, boffset,boffset);
*err_count_out += 1;
}
offset = line_ptr - section_start;
dwarf_printf(dbg,
" statement prog offset in section: 0x%"
DW_PR_XZEROS DW_PR_DUx " (%" DW_PR_DUu ")\n",
offset, offset);
}
{
Dwarf_Bool doaddrs = false;
Dwarf_Bool dolines = true;
_dwarf_print_line_context_record(dbg,line_context);
if (!line_ptr_actuals) {
/* Normal single level line table. */
Dwarf_Bool is_single_table = true;
Dwarf_Bool is_actuals_table = false;
print_line_header(dbg, is_single_table, is_actuals_table);
res = read_line_table_program(dbg,
line_ptr, line_ptr_end, orig_line_ptr,
section_start,
line_context,
address_size, doaddrs, dolines,
is_single_table,
is_actuals_table,
error,
err_count_out);
if (res != DW_DLV_OK) {
dwarf_srclines_dealloc_b(line_context);
return res;
}
} else {
Dwarf_Bool is_single_table = false;
Dwarf_Bool is_actuals_table = false;
if (line_context->lc_version_number !=
EXPERIMENTAL_LINE_TABLES_VERSION) {
dwarf_srclines_dealloc_b(line_context);
_dwarf_error(dbg, error, DW_DLE_VERSION_STAMP_ERROR);
return (DW_DLV_ERROR);
}
/* Read Logicals */
print_line_header(dbg, is_single_table, is_actuals_table);
res = read_line_table_program(dbg,
line_ptr, line_ptr_actuals, orig_line_ptr,
section_start,
line_context,
address_size, doaddrs, dolines,
is_single_table,
is_actuals_table,
error,err_count_out);
if (res != DW_DLV_OK) {
dwarf_srclines_dealloc_b(line_context);
return res;
}
if (line_context->lc_actuals_table_offset > 0) {
is_actuals_table = true;
/* Read Actuals */
print_line_header(dbg, is_single_table, is_actuals_table);
res = read_line_table_program(dbg,
line_ptr_actuals, line_ptr_end, orig_line_ptr,
section_start,
line_context,
address_size, doaddrs, dolines,
is_single_table,
is_actuals_table,
error,
err_count_out);
if (res != DW_DLV_OK) {
dwarf_srclines_dealloc_b(line_context);
return res;
}
}
}
}
dwarf_srclines_dealloc_b(line_context);
return DW_DLV_OK;
}
/**
* Finds a function name in DWARF DIE (Debug Information Entry).
* For more info on DWARF format, see http://www.dwarfstd.org/Download.php , http://www.ibm.com/developerworks/library/os-debugging/
*
* @return true if we need to stop search (i.e. either found it or some error happened)
*/
bool FindFunctionNameInDIE(Dwarf_Debug DebugInfo, Dwarf_Die Die, Dwarf_Addr Addr, const char **OutFuncName)
{
Dwarf_Error ErrorInfo;
Dwarf_Half Tag;
Dwarf_Unsigned LowerPC, HigherPC;
char *TempFuncName;
int ReturnCode;
if (dwarf_tag(Die, &Tag, &ErrorInfo) != DW_DLV_OK || Tag != DW_TAG_subprogram ||
dwarf_attrval_unsigned(Die, DW_AT_low_pc, &LowerPC, &ErrorInfo) != DW_DLV_OK ||
dwarf_attrval_unsigned(Die, DW_AT_high_pc, &HigherPC, &ErrorInfo) != DW_DLV_OK ||
Addr < LowerPC || HigherPC <= Addr
)
{
return false;
}
// found it
*OutFuncName = NULL;
Dwarf_Attribute SubAt;
ReturnCode = dwarf_attr(Die, DW_AT_name, &SubAt, &ErrorInfo);
if (ReturnCode == DW_DLV_ERROR)
{
return true; // error, but stop the search
}
else if (ReturnCode == DW_DLV_OK)
{
if (dwarf_formstring(SubAt, &TempFuncName, &ErrorInfo))
{
*OutFuncName = NULL;
}
else
{
*OutFuncName = TempFuncName;
}
return true;
}
// DW_AT_Name is not present, look in DW_AT_specification
Dwarf_Attribute SpecAt;
if (dwarf_attr(Die, DW_AT_specification, &SpecAt, &ErrorInfo))
{
// not found, tough luck
return false;
}
Dwarf_Off Offset;
if (dwarf_global_formref(SpecAt, &Offset, &ErrorInfo))
{
return false;
}
Dwarf_Die SpecDie;
if (dwarf_offdie(DebugInfo, Offset, &SpecDie, &ErrorInfo))
{
return false;
}
if (dwarf_attrval_string(SpecDie, DW_AT_name, OutFuncName, &ErrorInfo))
{
*OutFuncName = NULL;
}
return true;
}
/* Contrary to pre-2005 documentation,
The string pointer returned thru return_str must
never have dwarf_dealloc() applied to it.
Documentation fixed July 2005.
*/
int
dwarf_formstring(Dwarf_Attribute attr,
char **return_str, Dwarf_Error * error)
{
Dwarf_CU_Context cu_context = 0;
Dwarf_Debug dbg = 0;
Dwarf_Unsigned offset = 0;
int res = DW_DLV_ERROR;
Dwarf_Small *secdataptr = 0;
Dwarf_Small *secend = 0;
Dwarf_Unsigned secdatalen = 0;
Dwarf_Small *infoptr = attr->ar_debug_ptr;
res = get_attr_dbg(&dbg,&cu_context,attr,error);
if (res != DW_DLV_OK) {
return res;
}
if (cu_context->cc_is_info) {
secdataptr = (Dwarf_Small *)dbg->de_debug_info.dss_data;
secdatalen = dbg->de_debug_info.dss_size;
} else {
secdataptr = (Dwarf_Small *)dbg->de_debug_types.dss_data;
secdatalen = dbg->de_debug_types.dss_size;
}
switch(attr->ar_attribute_form) {
case DW_FORM_string: {
Dwarf_Small *begin = attr->ar_debug_ptr;
Dwarf_Small *contextend = secdataptr +
cu_context->cc_debug_offset +
cu_context->cc_length +
cu_context->cc_length_size +
cu_context->cc_extension_size;
secend = secdataptr + secdatalen;
if (contextend < secend) {
secend = contextend;
}
res= _dwarf_check_string_valid(dbg,secdataptr,begin, secend,error);
if (res != DW_DLV_OK) {
return res;
}
*return_str = (char *) (begin);
return DW_DLV_OK;
}
case DW_FORM_GNU_strp_alt:
case DW_FORM_strp_sup: {
Dwarf_Error alterr = 0;
/* See dwarfstd.org issue 120604.1
This is the offset in the .debug_str section
of another object file.
The 'tied' file notion should apply.
It is not clear whether both a supplementary
and a split object might be needed at the same time
(hence two 'tied' files simultaneously). */
Dwarf_Off soffset = 0;
res = dwarf_global_formref(attr, &soffset,error);
if (res != DW_DLV_OK) {
return res;
}
res = _dwarf_get_string_from_tied(dbg, soffset,
return_str, &alterr);
if (res == DW_DLV_ERROR) {
if (dwarf_errno(alterr) == DW_DLE_NO_TIED_FILE_AVAILABLE) {
dwarf_dealloc(dbg,alterr,DW_DLA_ERROR);
if( attr->ar_attribute_form == DW_FORM_GNU_strp_alt) {
*return_str =
(char *)"<DW_FORM_GNU_strp_alt-no-tied-file>";
} else {
*return_str =
(char *)"<DW_FORM_strp_sup-no-tied-file>";
}
return DW_DLV_OK;
}
if (error) {
*error = alterr;
}
return res;
}
if (res == DW_DLV_NO_ENTRY) {
if( attr->ar_attribute_form == DW_FORM_GNU_strp_alt) {
*return_str =
(char *)"<DW_FORM_GNU_strp_alt-no-tied-file>";
}else {
*return_str =
(char *)"<DW_FORM_strp_sup-no-tied-file>";
}
}
return res;
}
case DW_FORM_GNU_str_index:
case DW_FORM_strx: {
Dwarf_Unsigned offsettostr= 0;
res = _dwarf_extract_string_offset_via_str_offsets(dbg,
infoptr,
attr->ar_attribute,
attr->ar_attribute_form,
cu_context,
&offsettostr,
error);
if (res != DW_DLV_OK) {
return res;
}
offset = offsettostr;
break;
}
case DW_FORM_strp:
case DW_FORM_line_strp:{
READ_UNALIGNED(dbg, offset, Dwarf_Unsigned,
infoptr,
cu_context->cc_length_size);
break;
}
default:
_dwarf_error(dbg, error, DW_DLE_STRING_FORM_IMPROPER);
return DW_DLV_ERROR;
}
/* Now we have offset so read the string from
debug_str or debug_line_str. */
res = _dwarf_extract_local_debug_str_string_given_offset(dbg,
attr->ar_attribute_form,
offset,
return_str,
error);
return res;
}
static int get_type(Dwarf_Debug dbg, Dwarf_Die die)
{
Dwarf_Attribute attr;
Dwarf_Off off;
Dwarf_Die type_die;
Dwarf_Half tag;
int ret;
ret = dwarf_attr(die, DW_AT_type, &attr, NULL);
if (ret == DW_DLV_ERROR)
{
fprintf(stderr, "SET dwarf: Error in dwarf_attr()\n");
return 1;
}
if (ret == DW_DLV_NO_ENTRY)
return 0;
/* "DW_AT_type" is of the form "DW_FORM_ref4" */
ret = dwarf_global_formref(attr, &off, NULL);
dwarf_dealloc(dbg, attr, DW_DLA_ATTR);
if (ret != DW_DLV_OK)
{
fprintf(stderr, "SET dwarf: Error in dwarf_global_formref()\n");
return 1;
}
/* Get the referenced DIE which is the type of "die" */
ret = dwarf_offdie(dbg, off, &type_die, NULL);
if (ret != DW_DLV_OK)
{
fprintf(stderr, "SET dwarf: Error in dwarf_offdie()\n");
return 1;
}
/* Get the type */
ret = dwarf_tag(type_die, &tag, NULL);
if (ret != DW_DLV_OK)
{
fprintf(stderr, "SET dwarf: Error in dwarf_tag()\n");
dwarf_dealloc(dbg, type_die, DW_DLA_DIE);
return 1;
}
switch (tag)
{
case DW_TAG_base_type:
ret = get_size(dbg, type_die);
if (ret != 0)
{
dwarf_dealloc(dbg, type_die, DW_DLA_DIE);
return 1;
}
break;
case DW_TAG_pointer_type:
/* Recursive call */
/* FIXME */
// get_type(dbg, type_die);
ret = get_size(dbg, type_die);
if (ret != 0)
{
dwarf_dealloc(dbg, type_die, DW_DLA_DIE);
return 1;
}
break;
case DW_TAG_structure_type:
ret = get_size(dbg, type_die);
if (ret != 0)
{
dwarf_dealloc(dbg, type_die, DW_DLA_DIE);
return 1;
}
break;
case DW_TAG_union_type:
ret = get_size(dbg, type_die);
if (ret != 0)
{
dwarf_dealloc(dbg, type_die, DW_DLA_DIE);
return 1;
}
break;
case DW_TAG_enumeration_type:
ret = get_size(dbg, type_die);
if (ret != 0)
{
dwarf_dealloc(dbg, type_die, DW_DLA_DIE);
return 1;
}
break;
/* The types above have "DW_AT_byte_size" */
case DW_TAG_subroutine_type:
/* function pointer */
/* FIXME: Can be transformed to the real function by runtime address */
break;
case DW_TAG_typedef:
case DW_TAG_const_type:
case DW_TAG_volatile_type:
ret = get_type(dbg, type_die);
if (ret != 0)
{
dwarf_dealloc(dbg, type_die, DW_DLA_DIE);
return 1;
}
break;
default:
dwarf_dealloc(dbg, type_die, DW_DLA_DIE);
fprintf(stderr, "SET dwarf: Unspecified type\n");
return 1;
}
dwarf_dealloc(dbg, type_die, DW_DLA_DIE);
return 0;
}
QVariant DwarfDie::attributeLocal(Dwarf_Half attributeType) const
{
Dwarf_Attribute attr;
auto res = dwarf_attr(m_die, attributeType, &attr, nullptr);
if (res != DW_DLV_OK)
return {};
Dwarf_Half formType;
res = dwarf_whatform(attr, &formType, nullptr);
if (res != DW_DLV_OK)
return {};
QVariant value;
switch (formType) {
case DW_FORM_data1:
case DW_FORM_data2:
case DW_FORM_data4:
case DW_FORM_data8:
case DW_FORM_udata:
{
Dwarf_Unsigned n;
res = dwarf_formudata(attr, &n, nullptr);
value = n;
break;
}
case DW_FORM_sdata:
{
Dwarf_Signed n;
res = dwarf_formsdata(attr, &n, nullptr);
value = n;
break;
}
case DW_FORM_string:
case DW_FORM_strp:
{
char *str;
res = dwarf_formstring(attr, &str, nullptr);
value = QByteArray(str);
break;
}
case DW_FORM_flag:
case DW_FORM_flag_present:
{
Dwarf_Bool b;
res = dwarf_formflag(attr, &b, nullptr);
value = b ? true : false;
break;
}
case DW_FORM_ref1:
case DW_FORM_ref2:
case DW_FORM_ref4:
case DW_FORM_ref8:
{
Dwarf_Off offset;
res = dwarf_global_formref(attr, &offset, nullptr);
value = QVariant::fromValue(dwarfInfo()->dieAtOffset(offset));
break;
}
case DW_FORM_sec_offset:
{
Dwarf_Off offset;
res = dwarf_global_formref(attr, &offset, nullptr);
value = offset;
break;
}
case DW_FORM_addr:
{
Dwarf_Addr addr;
res = dwarf_formaddr(attr, &addr, nullptr);
value = addr;
break;
}
case DW_FORM_exprloc:
{
Dwarf_Unsigned len;
Dwarf_Ptr block;
res = dwarf_formexprloc(attr, &len, &block, nullptr);
value = QVariant::fromValue(DwarfExpression(block, len, dwarfInfo()->elfFile()->addressSize()));
break;
}
default:
{
const char* formName;
res = dwarf_get_FORM_name(formType, &formName);
if (res != DW_DLV_OK)
return {};
value = QStringLiteral("TODO: ") + QString::fromLocal8Bit(formName);
break;
}
}
// post-process some well-known types
switch (attributeType) {
case DW_AT_decl_file:
case DW_AT_call_file:
{
const auto fileIndex = value.value<Dwarf_Unsigned>();
// index 0 means not present, TODO handle that
value = compilationUnit()->sourceFileForIndex(fileIndex -1);
break;
}
case DW_AT_ranges:
value = QVariant::fromValue(DwarfRanges(this, value.toLongLong()));
break;
case DW_AT_accessibility:
stringifyEnum(value, &dwarf_get_ACCESS_name);
break;
case DW_AT_language:
stringifyEnum(value, &dwarf_get_LANG_name);
break;
case DW_AT_virtuality:
value = QVariant::fromValue(static_cast<DwarfVirtuality>(value.toInt()));
break;
case DW_AT_visibility:
stringifyEnum(value, &dwarf_get_VIS_name);
break;
case DW_AT_identifier_case:
stringifyEnum(value, &dwarf_get_ID_name);
break;
case DW_AT_inline:
stringifyEnum(value, &dwarf_get_INL_name);
break;
case DW_AT_encoding:
stringifyEnum(value, &dwarf_get_ATE_name);
break;
case DW_AT_ordering:
stringifyEnum(value, &dwarf_get_ORD_name);
break;
case DW_AT_calling_convention:
stringifyEnum(value, &dwarf_get_CC_name);
break;
case DW_AT_discr_list:
stringifyEnum(value, &dwarf_get_DSC_name);
break;
default:
break;
}
return value;
}
static void show_all_attrs(Dwarf_Die die, unsigned long level, void *ndata){
Dwarf_Error error;
Dwarf_Half tag;
dwarf_tag(die,&tag,&error);
const char *stag;
dwarf_get_TAG_name(tag,&stag);
Dwarf_Off off = 0x0;
dwarf_die_CU_offset(die,&off,&error);
fprintf(stderr,"[%u]<%x>%s\n",level,off,stag);
char **sourceFiles;
Dwarf_Signed num;
int res;
if( (res = dwarf_srcfiles(die,&sourceFiles,&num,&error)) == DW_DLV_OK){
fprintf(stderr,"Source Files Referenced:\n");
int i;
for(i = 0; i < num; i++){
fprintf(stderr,"%s\n",sourceFiles[i]);
dwarf_dealloc(d, sourceFiles[i],DW_DLA_STRING);
}
dwarf_dealloc(d, sourceFiles,DW_DLA_LIST);
}
Dwarf_Unsigned atcnt;
Dwarf_Attribute *atlist;
int errv;
if((errv = dwarf_attrlist(die, &atlist, &atcnt, &error)) == DW_DLV_OK){
int i;
for(i = 0; i < atcnt; i++){
Dwarf_Half attr;
if(dwarf_whatattr(atlist[i],&attr,&error) == DW_DLV_OK){
const char *sattr;
dwarf_get_AT_name(attr,&sattr);
fprintf(stderr,"\t%s => ",sattr);
}else{
fprintf(stderr,"\tCouldn't Get Attr Type!\n");
continue;
}
Dwarf_Half form;
if(dwarf_whatform(atlist[i],&form,&error) == DW_DLV_OK){
//const char *formname;
//dwarf_get_FORM_name(form,&formname);
//fprintf(stderr,"[%s] ",formname);
switch(form){
case DW_FORM_ref1:
case DW_FORM_ref2:
case DW_FORM_ref4:
case DW_FORM_ref8:
case DW_FORM_ref_udata:
{Dwarf_Off offset;
dwarf_formref(atlist[i],&offset,&error);
fprintf(stderr,"%x\n",offset);}
break;
case DW_FORM_ref_addr:
{Dwarf_Off offset;
dwarf_global_formref(atlist[i],&offset,&error);
fprintf(stderr,"%x\n",offset);}
break;
case DW_FORM_addr:
{Dwarf_Addr addr;
dwarf_formaddr(atlist[i],&addr,&error);
fprintf(stderr,"%x\n",addr);}
break;
case DW_FORM_flag:
{Dwarf_Bool flag;
dwarf_formflag(atlist[i],&flag,&error);
fprintf(stderr,"%s\n",flag ? "True" : "False");}
break;
case DW_FORM_udata:
case DW_FORM_data1:
case DW_FORM_data2:
case DW_FORM_data4:
case DW_FORM_data8:
{Dwarf_Unsigned val;
dwarf_formudata(atlist[i],&val,&error);
fprintf(stderr,"%u\n",val);}
break;
case DW_FORM_sdata:
{Dwarf_Signed val;
dwarf_formsdata(atlist[i],&val,&error);
fprintf(stderr,"%d\n",val);}
break;
case DW_FORM_block:
case DW_FORM_block1:
if(attr == DW_AT_location ||
attr == DW_AT_data_member_location ||
attr == DW_AT_vtable_elem_location ||
attr == DW_AT_string_length ||
attr == DW_AT_use_location ||
attr == DW_AT_return_addr){
/*
Dwarf_Locdesc *locationList;
Dwarf_Signed listLength;
int ret = dwarf_loclist( atlist[i], &locationList, &listLength, &error );
int frameRel = 0;
long offset = 0;
decode_location(locationList,listLength,&offset,NULL,&frameRel);
int i;
for( i = 0; i < listLength; ++i){
dwarf_dealloc(d,locationList[i].ld_s,DW_DLA_LOC_BLOCK);
}
dwarf_dealloc(d,locationList,DW_DLA_LOCDESC);
*/
DC_location dcl;
DC_get_location_attr_value(atlist[i],&dcl);
fprintf(stderr," %s:",dcl.isFrameOffset ? "FP Offset" : "Address");
fprintf(stderr," %ld\n",dcl.offset);
}else{
fprintf(stderr,"UNSUPPORTED ATTRIBUTE TYPE\n");
}
break;
case DW_FORM_string:
{char *val;
dwarf_formstring(atlist[i],&val,&error);
fprintf(stderr,"%s\n",val);}
break;
case DW_FORM_strp:
{char *str;
if( (dwarf_formstring(atlist[i],&str,&error) == DW_DLV_OK) ){
fprintf(stderr,"%s\n",str);
} }
break;
default:
fprintf(stderr,"Unhandled Attribute Form!\n");
break;
};
}
dwarf_dealloc(d, atlist[i], DW_DLA_ATTR);
}
dwarf_dealloc(d, atlist, DW_DLA_LIST);
}
}
static void
search_func(Dwarf_Debug dbg, Dwarf_Die die, Dwarf_Addr addr, char **rlt_func)
{
Dwarf_Die ret_die, spec_die;
Dwarf_Error de;
Dwarf_Half tag;
Dwarf_Unsigned lopc, hipc;
Dwarf_Off ref;
Dwarf_Attribute sub_at, spec_at;
char *func0;
const char *func1;
int ret;
if (*rlt_func != NULL)
goto done;
if (dwarf_tag(die, &tag, &de)) {
warnx("dwarf_tag: %s", dwarf_errmsg(de));
goto cont_search;
}
if (tag == DW_TAG_subprogram) {
if (dwarf_attrval_unsigned(die, DW_AT_low_pc, &lopc, &de) ||
dwarf_attrval_unsigned(die, DW_AT_high_pc, &hipc, &de))
goto cont_search;
if (handle_high_pc(die, lopc, &hipc) != DW_DLV_OK)
goto cont_search;
if (addr < lopc || addr >= hipc)
goto cont_search;
/* Found it! */
if ((*rlt_func = strdup(unknown)) == NULL)
err(EXIT_FAILURE, "strdup");
ret = dwarf_attr(die, DW_AT_name, &sub_at, &de);
if (ret == DW_DLV_ERROR)
goto done;
if (ret == DW_DLV_OK) {
if (dwarf_formstring(sub_at, &func0, &de) ==
DW_DLV_OK) {
free(*rlt_func);
if ((*rlt_func = strdup(func0)) == NULL)
err(EXIT_FAILURE, "strdup");
}
goto done;
}
/*
* If DW_AT_name is not present, but DW_AT_specification is
* present, then probably the actual name is in the DIE
* referenced by DW_AT_specification.
*/
if (dwarf_attr(die, DW_AT_specification, &spec_at, &de))
goto done;
if (dwarf_global_formref(spec_at, &ref, &de))
goto done;
if (dwarf_offdie(dbg, ref, &spec_die, &de))
goto done;
if (dwarf_attrval_string(spec_die, DW_AT_name, &func1, &de) ==
DW_DLV_OK) {
free(*rlt_func);
if ((*rlt_func = strdup(func1)) == NULL)
err(EXIT_FAILURE, "strdup");
}
goto done;
}
cont_search:
/* Search children. */
ret = dwarf_child(die, &ret_die, &de);
if (ret == DW_DLV_ERROR)
errx(EXIT_FAILURE, "dwarf_child: %s", dwarf_errmsg(de));
else if (ret == DW_DLV_OK)
search_func(dbg, ret_die, addr, rlt_func);
/* Search sibling. */
ret = dwarf_siblingof(dbg, die, &ret_die, &de);
if (ret == DW_DLV_ERROR)
errx(EXIT_FAILURE, "dwarf_siblingof: %s", dwarf_errmsg(de));
else if (ret == DW_DLV_OK)
search_func(dbg, ret_die, addr, rlt_func);
done:
dwarf_dealloc(dbg, die, DW_DLA_DIE);
}
static VALUE rd_attr_raw_value(VALUE self)
{
rd_attr_t *attr = GetAttr(self);
Dwarf_Half form;
Dwarf_Error err;
union {
Dwarf_Addr addr;
Dwarf_Off off;
Dwarf_Unsigned udata;
Dwarf_Signed sdata;
Dwarf_Bool bool;
char *str;
} val;
VALUE top;
chkerr1(dwarf_whatform(attr->attr, &form, &err), &err, self);
switch (form) {
case DW_FORM_addr:
chkerr1(dwarf_formaddr(attr->attr, &val.addr, &err), &err, self);
return ULL2NUM(val.addr);
case DW_FORM_ref1:
case DW_FORM_ref2:
case DW_FORM_ref4:
case DW_FORM_ref8:
case DW_FORM_ref_udata:
chkerr1(dwarf_global_formref(attr->attr, &val.off, &err), &err, self);
top = rb_ivar_get(self, id_at_top);
return rdwarf_die_at(top, LL2NUM(val.off));
case DW_FORM_data1:
case DW_FORM_data2:
case DW_FORM_data4:
case DW_FORM_data8:
case DW_FORM_udata:
chkerr1(dwarf_formudata(attr->attr, &val.udata, &err), &err, self);
return ULL2NUM(val.udata);
case DW_FORM_sdata:
chkerr1(dwarf_formsdata(attr->attr, &val.sdata, &err), &err, self);
return LL2NUM(val.sdata);
case DW_FORM_flag:
chkerr1(dwarf_formflag(attr->attr, &val.bool, &err), &err, self);
return val.bool ? Qtrue : Qfalse;
case DW_FORM_strp:
case DW_FORM_string:
chkerr1(dwarf_formstring(attr->attr, &val.str, &err), &err, self);
return rb_str_new_cstr(val.str);
}
return sym_unsupported_type;
}
