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-rw-r--r--qtmips_machine/programloader.cpp33
-rw-r--r--qtmips_machine/programloader.h2
-rw-r--r--qtmips_machine/qtmips_machine.pro6
-rw-r--r--qtmips_machine/qtmipsmachine.cpp13
-rw-r--r--qtmips_machine/qtmipsmachine.h5
-rw-r--r--qtmips_machine/symboltable.cpp98
-rw-r--r--qtmips_machine/symboltable.h82
7 files changed, 235 insertions, 4 deletions
diff --git a/qtmips_machine/programloader.cpp b/qtmips_machine/programloader.cpp
index 750fd00..859bab4 100644
--- a/qtmips_machine/programloader.cpp
+++ b/qtmips_machine/programloader.cpp
@@ -130,3 +130,36 @@ std::uint32_t ProgramLoader::end() {
std::uint32_t ProgramLoader::get_executable_entry() {
return executable_entry;
}
+
+SymbolTable *ProgramLoader::get_symbol_table() {
+ SymbolTable *p_st = new SymbolTable();
+ Elf_Scn *scn = NULL;
+ GElf_Shdr shdr;
+ Elf_Data *data;
+ int count, ii;
+
+ elf_version(EV_CURRENT);
+
+ while (1) {
+ if ((scn = elf_nextscn(this->elf, scn)) == NULL)
+ return p_st;
+ gelf_getshdr(scn, &shdr);
+ if (shdr.sh_type == SHT_SYMTAB) {
+ /* found a symbol table, go print it. */
+ break;
+ }
+ }
+
+ data = elf_getdata(scn, NULL);
+ count = shdr.sh_size / shdr.sh_entsize;
+
+ /* rettrieve the symbol names */
+ for (ii = 0; ii < count; ++ii) {
+ GElf_Sym sym;
+ gelf_getsym(data, ii, &sym);
+ p_st->add_symbol(elf_strptr(elf, shdr.sh_link, sym.st_name),
+ sym.st_value, sym.st_size, sym.st_info, sym.st_other);
+ }
+
+ return p_st;
+}
diff --git a/qtmips_machine/programloader.h b/qtmips_machine/programloader.h
index 607bdb0..b275c2f 100644
--- a/qtmips_machine/programloader.h
+++ b/qtmips_machine/programloader.h
@@ -43,6 +43,7 @@
#include <qvector.h>
#include <qstring.h>
#include <memory.h>
+#include "symboltable.h"
namespace machine {
@@ -55,6 +56,7 @@ public:
void to_memory(Memory *mem); // Writes all loaded sections to memory
std::uint32_t end(); // Return address after which there is no more code for sure
std::uint32_t get_executable_entry();
+ SymbolTable *get_symbol_table();
private:
int fd;
Elf *elf;
diff --git a/qtmips_machine/qtmips_machine.pro b/qtmips_machine/qtmips_machine.pro
index 961800c..9964357 100644
--- a/qtmips_machine/qtmips_machine.pro
+++ b/qtmips_machine/qtmips_machine.pro
@@ -27,7 +27,8 @@ SOURCES += \
physaddrspace.cpp \
peripheral.cpp \
serialport.cpp \
- peripspiled.cpp
+ peripspiled.cpp \
+ symboltable.cpp
HEADERS += \
qtmipsmachine.h \
@@ -45,4 +46,5 @@ HEADERS += \
physaddrspace.h \
peripheral.h \
serialport.h \
- peripspiled.h
+ peripspiled.h \
+ symboltable.h
diff --git a/qtmips_machine/qtmipsmachine.cpp b/qtmips_machine/qtmipsmachine.cpp
index 37e5461..e1ecf93 100644
--- a/qtmips_machine/qtmipsmachine.cpp
+++ b/qtmips_machine/qtmipsmachine.cpp
@@ -39,13 +39,17 @@
using namespace machine;
-QtMipsMachine::QtMipsMachine(const MachineConfig &cc) : QObject(), mcnf(&cc) {
+QtMipsMachine::QtMipsMachine(const MachineConfig &cc, bool load_symtab) :
+ QObject(), mcnf(&cc) {
MemoryAccess *cpu_mem;
stat = ST_READY;
+ symtab = nullptr;
ProgramLoader program(cc.elf());
mem_program_only = new Memory();
program.to_memory(mem_program_only);
+ if (load_symtab)
+ symtab = program.get_symbol_table();
program_end = program.end();
regs = new Registers();
if (program.get_executable_entry())
@@ -102,6 +106,9 @@ QtMipsMachine::~QtMipsMachine() {
if (mem_program_only != nullptr)
delete mem_program_only;
mem_program_only = nullptr;
+ if (symtab != nullptr)
+ delete symtab;
+ symtab = nullptr;
}
const MachineConfig &QtMipsMachine::config() {
@@ -145,6 +152,10 @@ PeripSpiLed *QtMipsMachine::peripheral_spi_led() {
return perip_spi_led;
}
+const SymbolTable *QtMipsMachine::symbol_table() {
+ return symtab;
+}
+
const Core *QtMipsMachine::core() {
return cr;
}
diff --git a/qtmips_machine/qtmipsmachine.h b/qtmips_machine/qtmipsmachine.h
index b49cb2f..1c80b9c 100644
--- a/qtmips_machine/qtmipsmachine.h
+++ b/qtmips_machine/qtmipsmachine.h
@@ -49,13 +49,14 @@
#include <peripheral.h>
#include <serialport.h>
#include <peripspiled.h>
+#include <symboltable.h>
namespace machine {
class QtMipsMachine : public QObject {
Q_OBJECT
public:
- QtMipsMachine(const MachineConfig &cc);
+ QtMipsMachine(const MachineConfig &cc, bool load_symtab = false);
~QtMipsMachine();
const MachineConfig &config();
@@ -69,6 +70,7 @@ public:
Cache *cache_data_rw();
SerialPort *serial_port();
PeripSpiLed *peripheral_spi_led();
+ const SymbolTable *symbol_table();
const Core *core();
const CoreSingle *core_singe();
const CorePipelined *core_pipelined();
@@ -122,6 +124,7 @@ private:
QTimer *run_t;
unsigned int time_chunk;
+ SymbolTable *symtab;
std::uint32_t program_end;
enum Status stat;
void set_status(enum Status st);
diff --git a/qtmips_machine/symboltable.cpp b/qtmips_machine/symboltable.cpp
new file mode 100644
index 0000000..f22acaa
--- /dev/null
+++ b/qtmips_machine/symboltable.cpp
@@ -0,0 +1,98 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*******************************************************************************
+ * QtMips - MIPS 32-bit Architecture Subset Simulator
+ *
+ * Implemented to support following courses:
+ *
+ * B35APO - Computer Architectures
+ * https://cw.fel.cvut.cz/wiki/courses/b35apo
+ *
+ * B4M35PAP - Advanced Computer Architectures
+ * https://cw.fel.cvut.cz/wiki/courses/b4m35pap/start
+ *
+ * Copyright (c) 2017-2019 Karel Koci<cynerd@email.cz>
+ * Copyright (c) 2019 Pavel Pisa <pisa@cmp.felk.cvut.cz>
+ *
+ * Faculty of Electrical Engineering (http://www.fel.cvut.cz)
+ * Czech Technical University (http://www.cvut.cz/)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ ******************************************************************************/
+
+#include "symboltable.h"
+
+using namespace machine;
+
+SymbolTableEntry::SymbolTableEntry(QString name, std::uint32_t value,
+ std::uint32_t size, unsigned char info, unsigned char other) {
+ this->name = name;
+ this->value = value;
+ this->size = size;
+ this->info = info;
+ this->other = other;
+}
+
+SymbolTable::SymbolTable(QObject *parent) : QObject(parent),
+ map_value_to_symbol(), map_name_to_symbol() {
+}
+
+SymbolTable::~SymbolTable() {
+ while (!map_value_to_symbol.isEmpty()) {
+ SymbolTableEntry *p_ste = map_value_to_symbol.first();
+ p_ste = map_value_to_symbol.take(p_ste->value);
+ map_name_to_symbol.remove(p_ste->name);
+ delete p_ste;
+ }
+}
+
+void SymbolTable::add_symbol(QString name, std::uint32_t value, std::uint32_t size,
+ unsigned char info, unsigned char other) {
+ SymbolTableEntry *p_ste = new SymbolTableEntry(name, value, size, info, other);
+ map_value_to_symbol.insert(value, p_ste);
+ map_name_to_symbol.insert(name, p_ste);
+}
+
+bool SymbolTable::name_to_value(std::uint32_t &value, QString name) const {
+ SymbolTableEntry *p_ste = map_name_to_symbol.value(name);
+ if (p_ste == nullptr) {
+ value = 0;
+ return false;
+ }
+ value = p_ste->value;
+ return true;
+}
+
+bool SymbolTable::value_to_name(QString &name, std::uint32_t value) const {
+ SymbolTableEntry *p_ste = map_value_to_symbol.value(value);
+ if (p_ste == nullptr) {
+ name = "";
+ return false;
+ }
+ name = p_ste->name;
+ return true;
+}
+
+QStringList *SymbolTable::names() const {
+ QStringList *l = new QStringList();
+
+ auto i = map_name_to_symbol.begin();
+ while (i != map_name_to_symbol.end()) {
+ l->append(i.value()->name);
+ i++;
+ }
+ return l;
+}
diff --git a/qtmips_machine/symboltable.h b/qtmips_machine/symboltable.h
new file mode 100644
index 0000000..174917c
--- /dev/null
+++ b/qtmips_machine/symboltable.h
@@ -0,0 +1,82 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*******************************************************************************
+ * QtMips - MIPS 32-bit Architecture Subset Simulator
+ *
+ * Implemented to support following courses:
+ *
+ * B35APO - Computer Architectures
+ * https://cw.fel.cvut.cz/wiki/courses/b35apo
+ *
+ * B4M35PAP - Advanced Computer Architectures
+ * https://cw.fel.cvut.cz/wiki/courses/b4m35pap/start
+ *
+ * Copyright (c) 2017-2019 Karel Koci<cynerd@email.cz>
+ * Copyright (c) 2019 Pavel Pisa <pisa@cmp.felk.cvut.cz>
+ *
+ * Faculty of Electrical Engineering (http://www.fel.cvut.cz)
+ * Czech Technical University (http://www.cvut.cz/)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ ******************************************************************************/
+
+#ifndef SYMBOLTABLE_H
+#define SYMBOLTABLE_H
+
+#include <QString>
+#include <QObject>
+#include <QMap>
+#include <QMultiMap>
+#include <QStringList>
+
+namespace machine {
+
+class SymbolTableEntry {
+ friend class SymbolTable;
+ SymbolTableEntry(QString name, std::uint32_t value, std::uint32_t size,
+ unsigned char info = 0, unsigned char other = 0);
+protected:
+ QString name;
+ std::uint32_t value;
+ std::uint32_t size;
+ unsigned char info;
+ unsigned char other;
+};
+
+class SymbolTable : public QObject
+{
+ Q_OBJECT
+public:
+ SymbolTable(QObject *parent = 0);
+ ~SymbolTable();
+
+ void add_symbol(QString name, std::uint32_t value, std::uint32_t size,
+ unsigned char info = 0, unsigned char other = 0);
+ QStringList *names() const;
+public slots:
+ bool name_to_value(std::uint32_t &value, QString name) const;
+ bool value_to_name(QString &name, std::uint32_t value) const;
+signals:
+
+
+private:
+ QMultiMap<std::uint32_t, SymbolTableEntry*> map_value_to_symbol;
+ QMap<QString, SymbolTableEntry*> map_name_to_symbol;
+};
+
+}
+
+#endif // SYMBOLTABLE_H
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