zupa

strlen-c/cpp/Make.rules

@@ -0,0 +1,81 @@
+
+ARCH=riscv64-unknown-elf
+GNU_DIR=$(HOME)/riscv/riscv/
+GNU_BIN=$(GNU_DIR)/bin
+
+
+CC=$(GNU_BIN)/$(ARCH)-gcc
+CXX=$(GNU_BIN)/$(ARCH)-g++
+AS=$(GNU_BIN)/$(ARCH)-as
+LD=$(GNU_BIN)/$(ARCH)-ld
+OBJCOPY=$(GNU_BIN)/$(ARCH)-objcopy
+OBJDUMP=$(GNU_BIN)/$(ARCH)-objdump
+SIZE=$(GNU_BIN)/$(ARCH)-size
+AR=$(GNU_BIN)/$(ARCH)-ar
+RANLIB=$(GNU_BIN)/$(ARCH)-ranlib
+
+
+CFLAGS+=-ffreestanding 
+CFLAGS+=-fno-pic
+CFLAGS+=-march=rv32i -mabi=ilp32
+CFLAGS+=  -g
+
+
+LDFLAGS+=-nostdlib
+LDFLAGS+=-Wl,-Ttext=0x00000000
+
+# see: https://github.com/riscv/riscv-gcc/issues/120
+#LDFLAGS+=-Wl,--no-relax
+
+
+
+ASFLAGS+=$(CFLAGS)
+CXXFLAGS+=$(CFLAGS)
+
+CLEAN_DIRS=$(SUBDIRS:%=clean-%)
+ALL_DIRS=$(SUBDIRS:%=all-%)
+
+OBJDUMPFLAGS+=-Mnumeric,no-aliases
+
+.PHONY: all clean world $(CLEAN_DIRS) $(ALL_DIRS)
+
+
+%.bin : %
+	$(OBJCOPY) $< -O binary $@
+
+%.lst : %
+	$(OBJDUMP) $(OBJDUMPFLAGS) -dr --disassemble-all $< > $<.lst
+
+% : %.o
+	$(LINK.cc) $(LDFLAGS) -o $@ $^ $(LDLIBS)
+	$(SIZE) -x -A $@
+
+%.s: %.c
+	$(COMPILE.c) -S -o $@ $<
+
+%.s: %.cc
+	$(COMPILE.cc) -S -o $@ $<
+
+%.o: %.c
+	$(COMPILE.c) -o $@ $<
+
+%.o: %.cc
+	$(COMPILE.cc) -o $@ $<
+
+%.srec: %
+	$(OBJCOPY) $< -O srec $@ 
+
+
+
+
+all:: $(ALL_DIRS)
+
+clean:: $(CLEAN_DIRS)
+
+$(ALL_DIRS)::
+	$(MAKE) -C $(@:all-%=%) all
+
+$(CLEAN_DIRS)::
+	$(MAKE) -C $(@:clean-%=%) clean
+
+world:: clean all

strlen-c/cpp/Makefile

@@ -0,0 +1,27 @@
+TOP=./
+include $(TOP)/Make.rules
+
+LDLIBS=
+#CFLAGS+=-O0 -g
+# CFLAGS+=-Og -ggdb3
+CFLAGS+=-O0 -ggdb3
+
+LDFLAGS+=-Wl,--no-relax
+LDFLAGS+=-Wl,-Ttext=0x80000000,-Tdata=0x80010000
+# LDFLAGS+=-T murax_128k_ram.ld
+
+PROGS=prog prog.bin prog.lst 
+
+all:: $(PROGS)
+
+prog: _crt0.o _rvmain.o myfunc.o
+	$(LINK.cc) -o $@ $^ $(LDLIBS)
+	$(SIZE) -A -x $@
+
+clean::
+	rm -f $(PROGS) *.o *.s *.lst *.bin *.srec *.dis
+
+.PHONY: run
+run: prog.bin
+	../../../src/rvddt -l0x3000 -f prog.bin
+

strlen-c/cpp/_crt0.S

@@ -0,0 +1,42 @@
+  .text
+  .global _start
+  .type   _start, @function
+
+_start:
+  # Initialize global pointer
+  .option push
+  .option norelax
+  la    gp, __global_pointer$
+  .option pop
+
+  li sp, 0x800ffff0
+
+  # Clear the bss segment
+  la    a0, __bss_start
+  la    a1, __BSS_END__
+
+clear_bss:
+  bgeu  a0, a1, finish_bss
+  sb    x0, 0(a0)
+  addi  a0, a0, 1
+  beq   x0, x0, clear_bss
+finish_bss:
+
+  nop //!
+
+  call  main
+
+  nop //!
+
+  # abort execution here
+  ebreak
+
+  .section .rodata
+alfabet:
+    .string "abcdefghijklmnopqrstuwxyz"
+slowo:
+
+  .section .data
+wynik:
+    .string "mpabi"
+    .space 26   # rezerwuje 26 bajtów dla wyniku, zainicjowane na 0

strlen-c/cpp/_rvmain.cpp

@@ -0,0 +1,73 @@
+#include <stdint.h>
+
+char *  ptr1 = "janek";
+char *  ptr2 = "kowalskii";
+
+int strlen(char *s)
+{
+     char *p = s;
+     while (*p != '\0')
+     p++;
+     return p - s;
+}
+
+void strcpy(char *s, char *t)
+{
+     while (*s++ = *t++);
+}
+
+
+#define ALLOCSIZE 10000
+
+static char allocbuf[ALLOCSIZE]; 
+static char *allocp = allocbuf; 
+
+char *alloc(int n) 
+{
+
+    if (n % 4 != 0) { 
+        n += 4 - (n % 4);
+    }
+
+
+     if (allocbuf + ALLOCSIZE - allocp >= n) { 
+     allocp += n;
+     return allocp - n; 
+     } else 
+     return 0;
+}
+
+int main()  {
+
+    char * s = "mpabi";
+ 
+ 
+   uint8_t wynik =0;
+    wynik = strlen (s);
+
+        asm("nop");
+
+
+        char *  p1 = alloc(strlen(ptr1)); 
+        strcpy (p1, ptr1);
+        asm("nop");
+
+        char *  p2 = alloc(strlen(ptr2)); 
+        strcpy (p2, ptr2);
+        asm("nop");
+
+        struct point {
+            int16_t x;
+            int16_t y;
+        };
+
+        struct point *  ptrS = (struct point *) alloc(sizeof(point)); 
+        ptrS->x=0x10;
+        ptrS->y=0x20;
+        asm("nop");
+
+        (*ptrS).y= strlen (p1)+ strlen(p2);
+
+    return 1;
+}
+

strlen-c/cpp/myfunc.cpp

@@ -0,0 +1,35 @@
+#include "myfunc.h"
+
+// Lokalna deklaracja funkcji my_strlen
+static int my_strlen(const char *str) {
+    int length = 0;
+    while (str[length] != '\0') {
+        length++;
+    }
+    return length;
+}
+
+void count_characters(const char* alfabet, const char* slowo, uint8_t* wynik) {
+    // Użycie my_strlen do obliczenia długości alfabetu
+    int alfabet_length = my_strlen(alfabet);
+
+    for (int i = 0; i < alfabet_length; ++i) {
+        wynik[i] = 0;
+    }
+
+    for (int i = 0; i < alfabet_length; ++i) {
+        for (int j = 0; slowo[j] != '\0'; ++j) {
+            if (alfabet[i] == slowo[j]) {
+                wynik[i]++;
+            }
+        }
+    }
+}
+
+// #include "myfunc.h"
+
+//     const char* alfabet = "abcdefghijklmnopqrstuwxyz";
+//     const char* slowo = "mpabi";
+//     int wynik[26] = {0}; // Inicjalizacja tablicy wyników na 0
+
+//     count_characters(alfabet, slowo, wynik);

strlen-c/cpp/myfunc.h

@@ -0,0 +1,9 @@
+#ifndef myfunc_H
+#define myfunc_H
+
+#include <stdint.h>
+
+
+void count_characters(const char* alfabet, const char* slowo, uint8_t* wynik);
+
+#endif

strlen-c/gdb/z.py

@@ -0,0 +1,17 @@
+# set args 0x1FF80 0x80 0x30
+# source gdb/z.py
+
+import gdb
+import sys
+
+# Parse arguments from the GDB command
+args = gdb.string_to_argv(gdb.parameter("args"))
+if len(args) != 3:
+    print("Usage: source gdb/zero_with_params.py <start_address> <num_bytes> <pattern>")
+else:
+    start_address = int(args[0], 16)  # Convert start address from hex to int
+    num_bytes = int(args[1], 16)      # Convert number of bytes from hex to int
+    pattern = int(args[2], 16)        # Convert pattern from hex to int
+    
+    for i in range(num_bytes):
+        gdb.execute("set *((char*)%x + %x) = %x" % (start_address, i, pattern))

strlen-c/gdb/zero.py

@@ -0,0 +1,5 @@
+#source gdb/z.py
+
+import gdb
+for i in range(0, 128): # 128 bajtów
+    gdb.execute("set *((char*)(0x1FF80 + %x)) = 0xaa" % i)

strlen-c/tex/main.tex

@@ -0,0 +1,110 @@
+\documentclass{article}
+\usepackage[a4paper, margin=2cm]{geometry}
+
+\usepackage[utf8]{inputenc}
+\usepackage[T1]{fontenc}
+\usepackage[polish]{babel}
+\usepackage{listings}
+\usepackage{color}
+
+\definecolor{codegreen}{rgb}{0,0.6,0}
+\definecolor{codegray}{rgb}{0.5,0.5,0.5}
+\definecolor{codepurple}{rgb}{0.58,0,0.82}
+\definecolor{backcolour}{rgb}{0.95,0.95,0.92}
+
+\lstdefinestyle{mystyle}{
+    backgroundcolor=\color{backcolour},   
+    commentstyle=\color{codegreen},
+    keywordstyle=\color{magenta},
+    numberstyle=\tiny\color{codegray},
+    stringstyle=\color{codepurple},
+    basicstyle=\ttfamily\footnotesize,
+    breakatwhitespace=false,         
+    breaklines=true,                 
+    captionpos=b,                    
+    keepspaces=true,                 
+    showspaces=false,                
+    showstringspaces=false,
+    showtabs=false,                  
+    tabsize=2
+}
+
+\lstset{style=mystyle}
+
+\begin{document}
+
+\title{GDB and DASHBOARD}
+\author{}
+\date{}
+\maketitle
+
+\section{Dashboard memory watch}
+Dashboard GDB pozwala na dynamiczne obserwowanie określonych obszarów pamięci. Używając funkcji \texttt{dashboard memory watch}, można ustawić obserwację na konkretne adresy pamięci.
+
+\begin{lstlisting}[language=bash]
+dashboard memory watch 0x1ff80 128 
+\end{lstlisting}
+
+\noindent
+Powyższa komenda skonfiguruje dashboard do obserwacji 128 bajtów pamięci, począwszy od adresu \texttt{0x1ff80}.
+
+\section{Obserwacja pamięci przy użyciu watch w GDB}
+Aby obserwować pamięć na niskim poziomie w GDB, można użyć komendy \texttt{watch} w połączeniu z rzutowaniem i rozmiarem obserwowanego obszaru. Przykładowo, aby obserwować 128 bajty pamięci zaczynając od adresu \texttt{0x1ff80}, użyjemy następującej komendy:
+
+\begin{lstlisting}[language=bash]
+watch *(char*)0x1ff80 @ 128 
+\end{lstlisting}
+
+Ta komenda spowoduje przerwanie wykonania programu, gdy wartości w obserwowanym obszarze pamięci ulegną zmianie. Użycie rzutowania na typ \texttt{(char*)} pozwala na interpretację adresu jako wskaźnika na bajty, a operator \texttt{@} określa ilość obserwowanych bajtów.
+
+\section{Clear Memory}
+
+\subsection{Basic Usage}
+To clear 128 bytes of memory starting from 0x1FF80, use the following script:
+
+\begin{lstlisting}[language=bash]
+#./gdb/zero.py
+
+import gdb 
+for i in range(0, 128): # 128 bajtów
+    gdb.execute("set *((char*)0x1FF80 + %d) = 0" % i)                                    
+\end{lstlisting}
+
+Run this script from GDB dashboard by:
+
+\begin{lstlisting}[language=bash]
+source gdb/zero.py 
+\end{lstlisting}
+
+\subsection{Option 2: With Parameters}
+To dynamically set the starting address, number of bytes, and pattern from the command line, modify the script as follows:
+
+\begin{lstlisting}[language=bash]
+#./gdb/zero_with_params.py
+
+import gdb
+import sys
+
+# Parse arguments from the GDB command
+args = gdb.string_to_argv(gdb.parameter("args"))
+if len(args) != 3:
+    print("Usage: source gdb/zero_with_params.py <start_address> <num_bytes> <pattern>")
+else:
+    start_address = int(args[0], 16)  # Convert start address from hex to int
+    num_bytes = int(args[1], 16)      # Convert number of bytes from hex to int
+    pattern = int(args[2], 16)        # Convert pattern from hex to int
+    
+    for i in range(num_bytes):
+        gdb.execute("set *((char*)%d + %d) = %d" % (start_address, i, pattern))
+\end{lstlisting}
+
+To run this script with parameters, set GDB's `args` parameter before sourcing the script:
+
+\begin{lstlisting}[language=bash]
+set args 0x1FF80 0x80 0x30
+source gdb/zero_with_params.py
+\end{lstlisting}
+
+This allows specifying the starting address, number of bytes to clear, and the pattern to use directly from the GDB command line.
+
+\end{document}