mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-26 21:32:10 +00:00
e25a2bd2e3
Still not fixed in the standard ;) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154044 91177308-0d34-0410-b5e6-96231b3b80d8
428 lines
11 KiB
C++
428 lines
11 KiB
C++
//===-- DWARFFormValue.cpp ------------------------------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "DWARFFormValue.h"
|
|
#include "DWARFCompileUnit.h"
|
|
#include "DWARFContext.h"
|
|
#include "llvm/Support/Dwarf.h"
|
|
#include "llvm/Support/Format.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
#include <cassert>
|
|
using namespace llvm;
|
|
using namespace dwarf;
|
|
|
|
static const uint8_t form_sizes_addr4[] = {
|
|
0, // 0x00 unused
|
|
4, // 0x01 DW_FORM_addr
|
|
0, // 0x02 unused
|
|
0, // 0x03 DW_FORM_block2
|
|
0, // 0x04 DW_FORM_block4
|
|
2, // 0x05 DW_FORM_data2
|
|
4, // 0x06 DW_FORM_data4
|
|
8, // 0x07 DW_FORM_data8
|
|
0, // 0x08 DW_FORM_string
|
|
0, // 0x09 DW_FORM_block
|
|
0, // 0x0a DW_FORM_block1
|
|
1, // 0x0b DW_FORM_data1
|
|
1, // 0x0c DW_FORM_flag
|
|
0, // 0x0d DW_FORM_sdata
|
|
4, // 0x0e DW_FORM_strp
|
|
0, // 0x0f DW_FORM_udata
|
|
4, // 0x10 DW_FORM_ref_addr
|
|
1, // 0x11 DW_FORM_ref1
|
|
2, // 0x12 DW_FORM_ref2
|
|
4, // 0x13 DW_FORM_ref4
|
|
8, // 0x14 DW_FORM_ref8
|
|
0, // 0x15 DW_FORM_ref_udata
|
|
0, // 0x16 DW_FORM_indirect
|
|
};
|
|
|
|
static const uint8_t form_sizes_addr8[] = {
|
|
0, // 0x00 unused
|
|
8, // 0x01 DW_FORM_addr
|
|
0, // 0x02 unused
|
|
0, // 0x03 DW_FORM_block2
|
|
0, // 0x04 DW_FORM_block4
|
|
2, // 0x05 DW_FORM_data2
|
|
4, // 0x06 DW_FORM_data4
|
|
8, // 0x07 DW_FORM_data8
|
|
0, // 0x08 DW_FORM_string
|
|
0, // 0x09 DW_FORM_block
|
|
0, // 0x0a DW_FORM_block1
|
|
1, // 0x0b DW_FORM_data1
|
|
1, // 0x0c DW_FORM_flag
|
|
0, // 0x0d DW_FORM_sdata
|
|
4, // 0x0e DW_FORM_strp
|
|
0, // 0x0f DW_FORM_udata
|
|
8, // 0x10 DW_FORM_ref_addr
|
|
1, // 0x11 DW_FORM_ref1
|
|
2, // 0x12 DW_FORM_ref2
|
|
4, // 0x13 DW_FORM_ref4
|
|
8, // 0x14 DW_FORM_ref8
|
|
0, // 0x15 DW_FORM_ref_udata
|
|
0, // 0x16 DW_FORM_indirect
|
|
};
|
|
|
|
const uint8_t *
|
|
DWARFFormValue::getFixedFormSizesForAddressSize(uint8_t addr_size) {
|
|
switch (addr_size) {
|
|
case 4: return form_sizes_addr4;
|
|
case 8: return form_sizes_addr8;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
bool
|
|
DWARFFormValue::extractValue(DataExtractor data, uint32_t *offset_ptr,
|
|
const DWARFCompileUnit *cu) {
|
|
bool indirect = false;
|
|
bool is_block = false;
|
|
Value.data = NULL;
|
|
// Read the value for the form into value and follow and DW_FORM_indirect
|
|
// instances we run into
|
|
do {
|
|
indirect = false;
|
|
switch (Form) {
|
|
case DW_FORM_addr:
|
|
case DW_FORM_ref_addr:
|
|
Value.uval = data.getUnsigned(offset_ptr, cu->getAddressByteSize());
|
|
break;
|
|
case DW_FORM_block:
|
|
Value.uval = data.getULEB128(offset_ptr);
|
|
is_block = true;
|
|
break;
|
|
case DW_FORM_block1:
|
|
Value.uval = data.getU8(offset_ptr);
|
|
is_block = true;
|
|
break;
|
|
case DW_FORM_block2:
|
|
Value.uval = data.getU16(offset_ptr);
|
|
is_block = true;
|
|
break;
|
|
case DW_FORM_block4:
|
|
Value.uval = data.getU32(offset_ptr);
|
|
is_block = true;
|
|
break;
|
|
case DW_FORM_data1:
|
|
case DW_FORM_ref1:
|
|
case DW_FORM_flag:
|
|
Value.uval = data.getU8(offset_ptr);
|
|
break;
|
|
case DW_FORM_data2:
|
|
case DW_FORM_ref2:
|
|
Value.uval = data.getU16(offset_ptr);
|
|
break;
|
|
case DW_FORM_data4:
|
|
case DW_FORM_ref4:
|
|
Value.uval = data.getU32(offset_ptr);
|
|
break;
|
|
case DW_FORM_data8:
|
|
case DW_FORM_ref8:
|
|
Value.uval = data.getU64(offset_ptr);
|
|
break;
|
|
case DW_FORM_sdata:
|
|
Value.sval = data.getSLEB128(offset_ptr);
|
|
break;
|
|
case DW_FORM_strp:
|
|
Value.uval = data.getU32(offset_ptr);
|
|
break;
|
|
case DW_FORM_udata:
|
|
case DW_FORM_ref_udata:
|
|
Value.uval = data.getULEB128(offset_ptr);
|
|
break;
|
|
case DW_FORM_string:
|
|
Value.cstr = data.getCStr(offset_ptr);
|
|
// Set the string value to also be the data for inlined cstr form
|
|
// values only so we can tell the differnence between DW_FORM_string
|
|
// and DW_FORM_strp form values
|
|
Value.data = (uint8_t*)Value.cstr;
|
|
break;
|
|
case DW_FORM_indirect:
|
|
Form = data.getULEB128(offset_ptr);
|
|
indirect = true;
|
|
break;
|
|
default:
|
|
return false;
|
|
}
|
|
} while (indirect);
|
|
|
|
if (is_block) {
|
|
StringRef str = data.getData().substr(*offset_ptr, Value.uval);
|
|
Value.data = NULL;
|
|
if (!str.empty()) {
|
|
Value.data = reinterpret_cast<const uint8_t *>(str.data());
|
|
*offset_ptr += Value.uval;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
DWARFFormValue::skipValue(DataExtractor debug_info_data, uint32_t* offset_ptr,
|
|
const DWARFCompileUnit *cu) const {
|
|
return DWARFFormValue::skipValue(Form, debug_info_data, offset_ptr, cu);
|
|
}
|
|
|
|
bool
|
|
DWARFFormValue::skipValue(uint16_t form, DataExtractor debug_info_data,
|
|
uint32_t *offset_ptr, const DWARFCompileUnit *cu) {
|
|
bool indirect = false;
|
|
do {
|
|
indirect = false;
|
|
switch (form) {
|
|
// Blocks if inlined data that have a length field and the data bytes
|
|
// inlined in the .debug_info
|
|
case DW_FORM_block: {
|
|
uint64_t size = debug_info_data.getULEB128(offset_ptr);
|
|
*offset_ptr += size;
|
|
return true;
|
|
}
|
|
case DW_FORM_block1: {
|
|
uint8_t size = debug_info_data.getU8(offset_ptr);
|
|
*offset_ptr += size;
|
|
return true;
|
|
}
|
|
case DW_FORM_block2: {
|
|
uint16_t size = debug_info_data.getU16(offset_ptr);
|
|
*offset_ptr += size;
|
|
return true;
|
|
}
|
|
case DW_FORM_block4: {
|
|
uint32_t size = debug_info_data.getU32(offset_ptr);
|
|
*offset_ptr += size;
|
|
return true;
|
|
}
|
|
|
|
// Inlined NULL terminated C-strings
|
|
case DW_FORM_string:
|
|
debug_info_data.getCStr(offset_ptr);
|
|
return true;
|
|
|
|
// Compile unit address sized values
|
|
case DW_FORM_addr:
|
|
case DW_FORM_ref_addr:
|
|
*offset_ptr += cu->getAddressByteSize();
|
|
return true;
|
|
|
|
// 1 byte values
|
|
case DW_FORM_data1:
|
|
case DW_FORM_flag:
|
|
case DW_FORM_ref1:
|
|
*offset_ptr += 1;
|
|
return true;
|
|
|
|
// 2 byte values
|
|
case DW_FORM_data2:
|
|
case DW_FORM_ref2:
|
|
*offset_ptr += 2;
|
|
return true;
|
|
|
|
// 4 byte values
|
|
case DW_FORM_strp:
|
|
case DW_FORM_data4:
|
|
case DW_FORM_ref4:
|
|
*offset_ptr += 4;
|
|
return true;
|
|
|
|
// 8 byte values
|
|
case DW_FORM_data8:
|
|
case DW_FORM_ref8:
|
|
*offset_ptr += 8;
|
|
return true;
|
|
|
|
// signed or unsigned LEB 128 values
|
|
// case DW_FORM_APPLE_db_str:
|
|
case DW_FORM_sdata:
|
|
case DW_FORM_udata:
|
|
case DW_FORM_ref_udata:
|
|
debug_info_data.getULEB128(offset_ptr);
|
|
return true;
|
|
|
|
case DW_FORM_indirect:
|
|
indirect = true;
|
|
form = debug_info_data.getULEB128(offset_ptr);
|
|
break;
|
|
default:
|
|
return false;
|
|
}
|
|
} while (indirect);
|
|
return true;
|
|
}
|
|
|
|
void
|
|
DWARFFormValue::dump(raw_ostream &OS, const DWARFCompileUnit *cu) const {
|
|
DataExtractor debug_str_data(cu->getContext().getStringSection(), true, 0);
|
|
uint64_t uvalue = getUnsigned();
|
|
bool cu_relative_offset = false;
|
|
|
|
switch (Form) {
|
|
case DW_FORM_addr: OS << format("0x%016" PRIx64, uvalue); break;
|
|
case DW_FORM_flag:
|
|
case DW_FORM_data1: OS << format("0x%02x", (uint8_t)uvalue); break;
|
|
case DW_FORM_data2: OS << format("0x%04x", (uint16_t)uvalue); break;
|
|
case DW_FORM_data4: OS << format("0x%08x", (uint32_t)uvalue); break;
|
|
case DW_FORM_data8: OS << format("0x%016" PRIx64, uvalue); break;
|
|
case DW_FORM_string:
|
|
OS << '"';
|
|
OS.write_escaped(getAsCString(NULL));
|
|
OS << '"';
|
|
break;
|
|
case DW_FORM_block:
|
|
case DW_FORM_block1:
|
|
case DW_FORM_block2:
|
|
case DW_FORM_block4:
|
|
if (uvalue > 0) {
|
|
switch (Form) {
|
|
case DW_FORM_block: OS << format("<0x%" PRIx64 "> ", uvalue); break;
|
|
case DW_FORM_block1: OS << format("<0x%2.2x> ", (uint8_t)uvalue); break;
|
|
case DW_FORM_block2: OS << format("<0x%4.4x> ", (uint16_t)uvalue); break;
|
|
case DW_FORM_block4: OS << format("<0x%8.8x> ", (uint32_t)uvalue); break;
|
|
default: break;
|
|
}
|
|
|
|
const uint8_t* data_ptr = Value.data;
|
|
if (data_ptr) {
|
|
// uvalue contains size of block
|
|
const uint8_t* end_data_ptr = data_ptr + uvalue;
|
|
while (data_ptr < end_data_ptr) {
|
|
OS << format("%2.2x ", *data_ptr);
|
|
++data_ptr;
|
|
}
|
|
}
|
|
else
|
|
OS << "NULL";
|
|
}
|
|
break;
|
|
|
|
case DW_FORM_sdata: OS << getSigned(); break;
|
|
case DW_FORM_udata: OS << getUnsigned(); break;
|
|
case DW_FORM_strp: {
|
|
OS << format(" .debug_str[0x%8.8x] = ", (uint32_t)uvalue);
|
|
const char* dbg_str = getAsCString(&debug_str_data);
|
|
if (dbg_str) {
|
|
OS << '"';
|
|
OS.write_escaped(dbg_str);
|
|
OS << '"';
|
|
}
|
|
break;
|
|
}
|
|
case DW_FORM_ref_addr:
|
|
OS << format("0x%016" PRIx64, uvalue);
|
|
break;
|
|
case DW_FORM_ref1:
|
|
cu_relative_offset = true;
|
|
OS << format("cu + 0x%2.2x", (uint8_t)uvalue);
|
|
break;
|
|
case DW_FORM_ref2:
|
|
cu_relative_offset = true;
|
|
OS << format("cu + 0x%4.4x", (uint16_t)uvalue);
|
|
break;
|
|
case DW_FORM_ref4:
|
|
cu_relative_offset = true;
|
|
OS << format("cu + 0x%4.4x", (uint32_t)uvalue);
|
|
break;
|
|
case DW_FORM_ref8:
|
|
cu_relative_offset = true;
|
|
OS << format("cu + 0x%8.8" PRIx64, uvalue);
|
|
break;
|
|
case DW_FORM_ref_udata:
|
|
cu_relative_offset = true;
|
|
OS << format("cu + 0x%" PRIx64, uvalue);
|
|
break;
|
|
|
|
// All DW_FORM_indirect attributes should be resolved prior to calling
|
|
// this function
|
|
case DW_FORM_indirect:
|
|
OS << "DW_FORM_indirect";
|
|
break;
|
|
default:
|
|
OS << format("DW_FORM(0x%4.4x)", Form);
|
|
break;
|
|
}
|
|
|
|
if (cu_relative_offset)
|
|
OS << format(" => {0x%8.8" PRIx64 "}", uvalue + (cu ? cu->getOffset() : 0));
|
|
}
|
|
|
|
const char*
|
|
DWARFFormValue::getAsCString(const DataExtractor *debug_str_data_ptr) const {
|
|
if (isInlinedCStr()) {
|
|
return Value.cstr;
|
|
} else if (debug_str_data_ptr) {
|
|
uint32_t offset = Value.uval;
|
|
return debug_str_data_ptr->getCStr(&offset);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
uint64_t DWARFFormValue::getReference(const DWARFCompileUnit *cu) const {
|
|
uint64_t die_offset = Value.uval;
|
|
switch (Form) {
|
|
case DW_FORM_ref1:
|
|
case DW_FORM_ref2:
|
|
case DW_FORM_ref4:
|
|
case DW_FORM_ref8:
|
|
case DW_FORM_ref_udata:
|
|
die_offset += (cu ? cu->getOffset() : 0);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return die_offset;
|
|
}
|
|
|
|
bool
|
|
DWARFFormValue::resolveCompileUnitReferences(const DWARFCompileUnit *cu) {
|
|
switch (Form) {
|
|
case DW_FORM_ref1:
|
|
case DW_FORM_ref2:
|
|
case DW_FORM_ref4:
|
|
case DW_FORM_ref8:
|
|
case DW_FORM_ref_udata:
|
|
Value.uval += cu->getOffset();
|
|
Form = DW_FORM_ref_addr;
|
|
return true;
|
|
default:
|
|
break;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
const uint8_t *DWARFFormValue::BlockData() const {
|
|
if (!isInlinedCStr())
|
|
return Value.data;
|
|
return NULL;
|
|
}
|
|
|
|
bool DWARFFormValue::isBlockForm(uint16_t form) {
|
|
switch (form) {
|
|
case DW_FORM_block:
|
|
case DW_FORM_block1:
|
|
case DW_FORM_block2:
|
|
case DW_FORM_block4:
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool DWARFFormValue::isDataForm(uint16_t form) {
|
|
switch (form) {
|
|
case DW_FORM_sdata:
|
|
case DW_FORM_udata:
|
|
case DW_FORM_data1:
|
|
case DW_FORM_data2:
|
|
case DW_FORM_data4:
|
|
case DW_FORM_data8:
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|