ajout de breakpoint

Breakpoint.cpp

@@ -0,0 +1,65 @@
+// Breakpoint.cpp
+#include "Breakpoint.hpp"
+#include <sys/ptrace.h>
+#include <unistd.h>
+#include <cstdint>
+#include <cstring>
+#include <stdexcept>
+#include <cerrno>
+#include <cstdio>
+
+Breakpoint::Breakpoint(pid_t pid, std::intptr_t addr)
+    : m_pid(pid), m_addr(addr) {}
+
+void Breakpoint::enable() {
+    if (m_addr % 4 != 0) {
+        throw std::runtime_error("[!] Breakpoint address is not 4-byte aligned (AArch64 requires alignment).");
+    }
+
+    errno = 0;
+    long data = ptrace(PTRACE_PEEKDATA, m_pid, m_addr, nullptr);
+    if (data == -1 && errno != 0) {
+        perror("ptrace PEEKDATA failed");
+        throw std::runtime_error("ptrace PEEKDATA failed");
+    }
+
+    std::memcpy(&m_saved_data, &data, sizeof(uint32_t));
+
+    uint32_t brk_instr = 0xD4200000;
+    long data_with_brk;
+    std::memcpy(&data_with_brk, &brk_instr, sizeof(uint32_t));
+    data_with_brk |= (data & ~0xFFFFFFFF);
+
+    if (ptrace(PTRACE_POKEDATA, m_pid, m_addr, data_with_brk) == -1) {
+        perror("ptrace POKEDATA failed");
+        throw std::runtime_error("ptrace POKEDATA failed");
+    }
+
+    m_enabled = true;
+}
+
+void Breakpoint::disable() {
+    errno = 0;
+    long data = ptrace(PTRACE_PEEKDATA, m_pid, m_addr, nullptr);
+    if (data == -1 && errno != 0) {
+        perror("ptrace PEEKDATA failed");
+        throw std::runtime_error("ptrace PEEKDATA failed");
+    }
+
+    long restored_data = (data & ~0xFFFFFFFF) | m_saved_data;
+    if (ptrace(PTRACE_POKEDATA, m_pid, m_addr, restored_data) == -1) {
+        perror("ptrace POKEDATA failed");
+        throw std::runtime_error("ptrace POKEDATA failed");
+    }
+
+    m_enabled = false;
+}
+
+std::intptr_t Breakpoint::get_address() const {
+    return m_addr;
+}
+
+bool Breakpoint::is_enabled() const {
+    return m_enabled;
+}
+

Breakpoint.hpp

@@ -0,0 +1,23 @@
+// Breakpoint.hpp
+#pragma once
+#include <sys/types.h>
+#include <cstdint>
+
+class Breakpoint {
+public:
+    Breakpoint(pid_t pid, std::intptr_t addr);
+
+    void enable();
+    void disable();
+
+    std::intptr_t get_address() const;
+
+    bool is_enabled() const;
+
+private:
+    pid_t m_pid;
+    std::intptr_t m_addr;
+    bool m_enabled = false;
+    uint8_t m_saved_data;
+};
+

Makefile

@@ -2,7 +2,7 @@
 CXX = g++
 CXXFLAGS = -Wall -Wextra -Werror
 
-SRC = main.cpp Debugger.cpp
+SRC = main.cpp Debugger.cpp Breakpoint.cpp
 OBJ = $(SRC:.cpp=.o)
 TARGET = nullDBG