This commit is contained in:
borysr 2024-05-16 11:16:25 +02:00
parent b2647024e3
commit 409f62d7d2
10 changed files with 399 additions and 0 deletions

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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

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cpp/Makefile Normal file
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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

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cpp/_crt0.S Normal file
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.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

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cpp/_rvmain.cpp Normal file
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#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;
}

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#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);

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

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# 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))

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

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\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}