Finish linear sweep implementation, add polish, update README

README.md

@@ -5,3 +5,23 @@
 ## Supported Binary formats
 
 `chisel` supports binaries compiled to the [ELF format](https://en.wikipedia.org/wiki/Executable_and_Linkable_Format) from most x86/x64 *nix systems, and __does not__ currently support macOS Mach-O or Windows PE binaries.
+
+> Due to an indexing bug, current iterations of chisel do not support 32-bit x86 applications
+
+
+## Building and Installing
+
+To build and install `chisel`, use the following steps:
+
+```shell
+$ git clone git@github.com:Gman0064/chisel.git
+
+$ cd chisel && cargo install
+```
+
+
+## Usage
+
+```shell
+$ chisel [path to ELF executable]
+```

src/main.rs

@@ -4,9 +4,8 @@
 // Description: Main entrypoint script for chisel. Contains basic procedures
 //              for gathering ELF file and program data.
 
-use iced_x86::*;
+use iced_x86::{Decoder, DecoderOptions, Formatter, NasmFormatter, Instruction};
 use std::collections::HashMap;
-use std::io::Write;
 use std::path;
 use std::env;
 use std::fs;
@@ -36,53 +35,59 @@ fn main() {
         let contents: Result<Vec<u8>, std::io::Error> = fs::read(file_path);
         
         if contents.is_ok() {
+
             let bytes: &Vec<u8> = &contents.expect("");
             let magic_num: &[u8] = &bytes[0..4];
         
+            // Check to see if our file contains the ELF magic number
             if magic_num == elf::MAGIC_NUMBER {
+
                 println!("Found ELF Magic Number...");
                 println!("Parsing File Header...");
 
                 // Build the File Header data structure
-                let file_header: elf::FileHeader = build_file_header(bytes);
+                let file_header: elf::FileHeader = util::build_file_header(bytes);
 
                 println!("\t- Found {} program header entries {} bytes in length", file_header.phnum, file_header.phentsize);
                 println!("\t- Found {} section header entries {} bytes in length", file_header.shnum, file_header.shentsize);
                 println!("\t- Found .shstrtab section at index {}", file_header.shstrndx); 
 
-                println!("{:?}", file_header);
+                println!("\n==== File Header ====");
+                util::pp_file_header(&file_header);
+
 
                 println!("\nParsing Section Headers...");
 
-
                 // Determine the shstrtab offset.
                 // This is found by taking the string table index and multiplying it by the section header entry size, then
                 // adding this to the initial section header offset.
                 let shstrtab_offset: u64 = file_header.shoff + (file_header.shentsize as u64 * file_header.shstrndx as u64);
 
                 // Build a read-only version of the .shstrtab section
-                let shstrtab_section: elf::SectionHeader = build_section_header(
+                let shstrtab_section: elf::SectionHeader = util::build_section_header(
                     bytes,
                     shstrtab_offset as usize,
                     file_header.is_x86_64
                 );
 
+                // Define all of our offsets for the shstrtab, and build a u8 buffer of the data
                 let shstrtab_start: u64 = shstrtab_section.offset;
                 let shstrtab_end: u64 = shstrtab_section.offset + shstrtab_section.size;
                 let shstrtab_data: Vec<u8> = bytes[shstrtab_start as usize..shstrtab_end as usize].to_vec();
 
                 println!("\t- Found .shstrtab section");
 
-
+                println!("\n==== Sections ====");
-                println!("\n=== Sections ===");
 
                 let mut section_table_map: HashMap<String, elf::SectionHeader> = HashMap::new();
                 let mut section_table_offset: u64 = file_header.shoff;
                 let mut section_table_count: i32 = 0;
 
-                // Build Section Header data structure
+                // Iterate through number of section headers
                 for _ in 0..file_header.shnum {
-                    let section_header: elf::SectionHeader = build_section_header(
+
+                    // Build section header data structure
+                    let section_header: elf::SectionHeader = util::build_section_header(
                         bytes, 
                         section_table_offset as usize,
                         file_header.is_x86_64
@@ -91,37 +96,37 @@ fn main() {
                     // Determine the section name for each section using the shstrtab data
                     let section_name: String = util::parse_section_name(&shstrtab_data, section_header.name as usize);
 
-                    println!("[{}] {}", section_table_count, section_name);
+                    util::pp_section_header(&section_header, section_table_count, &section_name);
-                    println!("{:?}", section_header);
 
                     section_table_map.insert(section_name, section_header);
 
+                    // Update the section table offset counter based on the section header size
                     section_table_offset += file_header.shentsize as u64;
                     section_table_count += 1;
                 }
 
                 println!("\nParsing Program Segments...");
                 
-                println!("\n=== Program Segments ===");
+                println!("\n==== Program Segments ====");
 
                 let mut program_table_offset = file_header.phoff;
                 let mut program_table_count: i32 = 0;
 
-                // Build Section Header data structure
+                // Iterate through number of Program Headers
                 for _ in 0..file_header.phnum {
                     // Build Program Header data structure
-                    let program_header: elf::ProgramHeader = build_program_header(
+                    let program_header: elf::ProgramHeader = util::build_program_header(
                         bytes, 
                         program_table_offset as usize,
                         file_header.is_x86_64
                     );
 
-                    // Set a default section name if there's no index found in the table
+                    // Parse the program name using the program type
                     let program_name: String = util::parse_program_segment_type(program_header.program_type);
 
-                    println!("[{}] {}", program_table_count, program_name);
+                    util::pp_program_header(&program_header, program_table_count, &program_name);
-                    println!("{:?}", program_header);
 
+                    // Update the program header table offset counter based on the program header size
                     program_table_offset += file_header.phentsize as u64;
                     program_table_count += 1;
                 }
@@ -132,22 +137,68 @@ fn main() {
                 let text_section_offset: usize = text_section.offset as usize;
                 let text_section_end: usize = text_section_offset + text_section.size as usize;
 
+                // Buffer of text section data
                 let text_section_buff: &[u8] = &bytes[text_section_offset..text_section_end];
 
-                let mut decoder: Decoder = Decoder::new(64, text_section_buff, DecoderOptions::NONE);
+                // Offsets for resizing buffer
-                let mut instruction: Instruction = Instruction::default();
+                let mut instr_start: usize = 0;
-                let instruction_start: u64 = 0;
+                let mut instr_end: usize = 1;
-                let instruction_length: u64 = 1;
+                let mut ip_offset: u64 = text_section.offset;
 
-                while (instruction_start + instruction_length) < text_section.size {
+                // Define our instruction buffer
-                    //let instruction_bytes: &[u8] = &text_section_buff[instruction_start..instruction_length];
+                let mut instr_bytes: &[u8] = &text_section_buff[instr_start..instr_end];
-                    //instruction.
+
-                    //decoder.decode_out(instruction)
+                // Define our decoder and icedx86 variables
+                let mut decoder: Decoder = Decoder::with_ip(64, instr_bytes, text_section.offset, DecoderOptions::NONE);
+                let mut formatter: NasmFormatter = NasmFormatter::new();
+                let mut instruction: Instruction = Instruction::default();
+                let mut output = String::new();
+
+                // Specify options for our NASM instruction formatter
+                // Formatting and linear sweep pattern partially borrowed from icedx86 docs
+                // https://docs.rs/iced-x86/latest/iced_x86/#disassemble-decode-and-format-instructions
+                formatter.options_mut().set_digit_separator("`");
+                formatter.options_mut().set_first_operand_char_index(10);
+
+                
+                println!("==== Text Section Analysis ====\n");
+
+                while decoder.can_decode() {
+                    // Decode the instruction sub-buffer
+                    decoder.decode_out(&mut instruction);
+            
+                    if instruction.is_invalid() {
+                        
+                        // Instruction invalid
+                        // Increase the buffer size by 1, then try to parse again
+                        instr_end = instr_end + 1;
+                        instr_bytes = &text_section_buff[instr_start..instr_end];
+                        decoder = Decoder::with_ip(64, instr_bytes, ip_offset, DecoderOptions::NONE);
+
+                    } else {
+
+                        // Got a valid instruction
+                        // Format the instruction for printing
+                        output.clear();
+                        formatter.format(&instruction, &mut output);
+
+                        // Print the instruction to an output assembly file
+                        println!("{:016X}\t{}", instruction.ip(), output);
+
+                        // Reset the buffer start to the end of the previous buffer, then try to parse again
+                        instr_start = instr_end;
+
+                        // If the instruction end index is less than the buffer, increase it
+                        if (instr_end + 1) < text_section_buff.len() {
+                            instr_end = instr_end + 1;
                         }
                     
-                //let out_file = fs::File::create("out.s").unwrap();
+                        // Resize the instruction buffer and parse it again
-                //out_file.write()
+                        instr_bytes = &text_section_buff[instr_start..instr_end];
-                //out_file.flush();
+                        ip_offset = text_section.offset + instr_start as u64;
+                        decoder = Decoder::with_ip(64, instr_bytes, ip_offset, DecoderOptions::NONE);
+                    }
+                }
 
             } else {
                 println!("[Error] Could not find magic number, is this an ELF executable?")
@@ -160,80 +211,3 @@ fn main() {
 
     return;
 }
-
-
-fn build_file_header(data: &Vec<u8>) -> elf::FileHeader {
-
-    // Determine x86 or x64 architecture
-    // 0 : x86
-    // 1 : x64
-    let arch: usize = (data[elf::ARCH_OFFSET as usize] - 1).into();
-
-    let file_header: elf::FileHeader = elf::FileHeader {
-        arch: util::parse_architecture(data[elf::ARCH_OFFSET as usize]),
-        is_x86_64: arch != 0,
-        endian: util::parse_endian(data[elf::ENDIAN_OFFSET as usize]),
-        abi: data[elf::ABI_OFFSET as usize],
-        abi_str: util::parse_abi(data[elf::ABI_OFFSET as usize]),
-        elf_type: util::u16_from_buffer(data, elf::TYPE_OFFSET as usize),
-        isa: util::u16_from_buffer(data, elf::MACHINE_OFFSET as usize),
-        isa_str: util::parse_isa(util::u16_from_buffer(data, elf::MACHINE_OFFSET as usize)),
-        entryoff: util::u64_from_buffer(data, elf::ENTRYPOINT_OFFSET as usize),
-        phoff: util::u64_from_buffer(data, elf::PHOFF_OFFSET[arch] as usize),
-        shoff: util::u64_from_buffer(data, elf::SHOFF_OFFSET[arch] as usize),
-        ehsize: util::u16_from_buffer(data, elf::EHSIZE_OFFSET[arch] as usize),
-        phentsize: util::u16_from_buffer(data, elf::PHENTSIZE_OFFSET[arch] as usize),
-        phnum: util::u16_from_buffer(data, elf::PHNUM_OFFSET[arch] as usize),
-        shentsize: util::u16_from_buffer(data, elf::SHENTSIZE_OFFSET[arch] as usize),
-        shnum: util::u16_from_buffer(data, elf::SHNUM_OFFSET[arch] as usize),
-        shstrndx: util::u16_from_buffer(data, elf::SHSTRNDX_OFFSET[arch] as usize),
-    };
-
-    return file_header;
-}
-
-
-fn build_program_header(data: &Vec<u8>, phoffset: usize, is_x86_64: bool) -> elf::ProgramHeader  {
-
-    // Cast the supplied is_x86_64 bool to an array offset
-    // 0 : x86
-    // 1 : x64
-    let arch: usize = is_x86_64.into();
-
-    let program_header: elf::ProgramHeader = elf::ProgramHeader {
-        program_type: util::u32_from_buffer(data, phoffset + elf::PH_TYPE_OFFSET as usize),
-        flags: util::u32_from_buffer(data, phoffset + elf::PH_FLAGS_OFFSET[arch] as usize),
-        offset: util::u64_from_buffer(data, phoffset + elf::PH_OFFSET_OFFSET[arch] as usize),
-        vaddr: util::u64_from_buffer(data, phoffset + elf::PH_VADDR_OFFSET[arch] as usize),
-        paddr: util::u64_from_buffer(data, phoffset + elf::PH_PADDR_OFFSET[arch] as usize),
-        filesz: util::u64_from_buffer(data, phoffset + elf::PH_FILESZ_OFFSET[arch] as usize),
-        memsz: util::u64_from_buffer(data, phoffset + elf::PH_MEMSZ_OFFSET[arch] as usize),
-        align: util::u64_from_buffer(data, phoffset + elf::PH_ALIGN_OFFSET[arch] as usize)
-    };
-
-    return program_header;
-}
-
-
-fn build_section_header(data: &Vec<u8>, shoffset: usize, is_x86_64: bool) -> elf::SectionHeader  {
-
-    // Cast the supplied is_x86_64 bool to an array offset
-    // 0 : x86
-    // 1 : x64
-    let arch: usize = is_x86_64.into();
-
-    let section_header: elf::SectionHeader = elf::SectionHeader {
-        name: util::u32_from_buffer(data, shoffset + elf::SH_NAME_OFFSET as usize),
-        section_type: util::u32_from_buffer(data, shoffset + elf::SH_TYPE_OFFSET as usize),
-        flags: util::u64_from_buffer(data, shoffset + elf::SH_FLAGS_OFFSET as usize),
-        addr: util::u64_from_buffer(data, shoffset + elf::SH_ADDR_OFFSET[arch] as usize),
-        offset: util::u64_from_buffer(data, shoffset + elf::SH_OFFSET_OFFSET[arch] as usize),
-        size: util::u64_from_buffer(data, shoffset + elf::SH_SIZE_OFFSET[arch] as usize),
-        link: util::u32_from_buffer(data, shoffset + elf::SH_LINK_OFFSET[arch] as usize),
-        info: util::u32_from_buffer(data, shoffset + elf::SH_INFO_OFFSET[arch] as usize),
-        addralign: util::u64_from_buffer(data, shoffset + elf::SH_ADDRALIGN_OFFSET[arch] as usize),
-        entsize: util::u64_from_buffer(data, shoffset + elf::SH_ENTSIZE_OFFSET[arch] as usize)
-    };
-
-    return section_header;
-}

src/util.rs

@@ -9,6 +9,83 @@ use std::mem;
 use crate::elf::{self, EndianType, ArchitectureType};
 
 
+pub fn build_file_header(data: &Vec<u8>) -> elf::FileHeader {
+
+    // Determine x86 or x64 architecture
+    // 0 : x86
+    // 1 : x64
+    let arch: usize = (data[elf::ARCH_OFFSET as usize] - 1).into();
+
+    let file_header: elf::FileHeader = elf::FileHeader {
+        arch: parse_architecture(data[elf::ARCH_OFFSET as usize]),
+        is_x86_64: arch != 0,
+        endian: parse_endian(data[elf::ENDIAN_OFFSET as usize]),
+        abi: data[elf::ABI_OFFSET as usize],
+        abi_str: parse_abi(data[elf::ABI_OFFSET as usize]),
+        elf_type: u16_from_buffer(data, elf::TYPE_OFFSET as usize),
+        isa: u16_from_buffer(data, elf::MACHINE_OFFSET as usize),
+        isa_str: parse_isa(u16_from_buffer(data, elf::MACHINE_OFFSET as usize)),
+        entryoff: u64_from_buffer(data, elf::ENTRYPOINT_OFFSET as usize),
+        phoff: u64_from_buffer(data, elf::PHOFF_OFFSET[arch] as usize),
+        shoff: u64_from_buffer(data, elf::SHOFF_OFFSET[arch] as usize),
+        ehsize: u16_from_buffer(data, elf::EHSIZE_OFFSET[arch] as usize),
+        phentsize: u16_from_buffer(data, elf::PHENTSIZE_OFFSET[arch] as usize),
+        phnum: u16_from_buffer(data, elf::PHNUM_OFFSET[arch] as usize),
+        shentsize: u16_from_buffer(data, elf::SHENTSIZE_OFFSET[arch] as usize),
+        shnum: u16_from_buffer(data, elf::SHNUM_OFFSET[arch] as usize),
+        shstrndx: u16_from_buffer(data, elf::SHSTRNDX_OFFSET[arch] as usize),
+    };
+
+    return file_header;
+}
+
+
+pub fn build_program_header(data: &Vec<u8>, phoffset: usize, is_x86_64: bool) -> elf::ProgramHeader {
+
+    // Cast the supplied is_x86_64 bool to an array offset
+    // 0 : x86
+    // 1 : x64
+    let arch: usize = is_x86_64.into();
+
+    let program_header: elf::ProgramHeader = elf::ProgramHeader {
+        program_type: u32_from_buffer(data, phoffset + elf::PH_TYPE_OFFSET as usize),
+        flags: u32_from_buffer(data, phoffset + elf::PH_FLAGS_OFFSET[arch] as usize),
+        offset: u64_from_buffer(data, phoffset + elf::PH_OFFSET_OFFSET[arch] as usize),
+        vaddr: u64_from_buffer(data, phoffset + elf::PH_VADDR_OFFSET[arch] as usize),
+        paddr: u64_from_buffer(data, phoffset + elf::PH_PADDR_OFFSET[arch] as usize),
+        filesz: u64_from_buffer(data, phoffset + elf::PH_FILESZ_OFFSET[arch] as usize),
+        memsz: u64_from_buffer(data, phoffset + elf::PH_MEMSZ_OFFSET[arch] as usize),
+        align: u64_from_buffer(data, phoffset + elf::PH_ALIGN_OFFSET[arch] as usize)
+    };
+
+    return program_header;
+}
+
+
+pub fn build_section_header(data: &Vec<u8>, shoffset: usize, is_x86_64: bool) -> elf::SectionHeader {
+
+    // Cast the supplied is_x86_64 bool to an array offset
+    // 0 : x86
+    // 1 : x64
+    let arch: usize = is_x86_64.into();
+
+    let section_header: elf::SectionHeader = elf::SectionHeader {
+        name: u32_from_buffer(data, shoffset + elf::SH_NAME_OFFSET as usize),
+        section_type: u32_from_buffer(data, shoffset + elf::SH_TYPE_OFFSET as usize),
+        flags: u64_from_buffer(data, shoffset + elf::SH_FLAGS_OFFSET as usize),
+        addr: u64_from_buffer(data, shoffset + elf::SH_ADDR_OFFSET[arch] as usize),
+        offset: u64_from_buffer(data, shoffset + elf::SH_OFFSET_OFFSET[arch] as usize),
+        size: u64_from_buffer(data, shoffset + elf::SH_SIZE_OFFSET[arch] as usize),
+        link: u32_from_buffer(data, shoffset + elf::SH_LINK_OFFSET[arch] as usize),
+        info: u32_from_buffer(data, shoffset + elf::SH_INFO_OFFSET[arch] as usize),
+        addralign: u64_from_buffer(data, shoffset + elf::SH_ADDRALIGN_OFFSET[arch] as usize),
+        entsize: u64_from_buffer(data, shoffset + elf::SH_ENTSIZE_OFFSET[arch] as usize)
+    };
+
+    return section_header;
+}
+
+
 pub fn parse_endian(endian: u8) -> elf::EndianType {
     match endian {
         0x00 => return EndianType::Big,
@@ -113,12 +190,81 @@ pub fn parse_section_name(buff: &Vec<u8>, index: usize) -> String {
         char = buff[char_ctr];
     }
 
-    let result = String::from_utf8(name).expect("Failed to parse section name!");
+    let result = String::from_utf8(name).expect("[Error] Failed to parse section name!");
     
     return result;
 }
 
 
+pub fn parse_elf_type(elf_type: u16) -> String {
+    match elf_type {
+        0x0000 => "Unknown".to_string(),
+        0x0001 => "Relocatable file".to_string(),
+        0x0002 => "Executable file".to_string(),
+        0x0003 => "Shared object".to_string(),
+        0x0004 => "Core file".to_string(),
+        0xFE00 => "Reserved, operating system specific".to_string(),
+        0xFEFF => "Reserved, operating system specific".to_string(),
+        0xFF00 => "Reserved, processor specific".to_string(),
+        0xFFFF => "Reserved, processor specific".to_string(),
+
+        // Match unknown segment type
+        _ => "UNKNOWN".to_string()
+    }
+}
+
+
+pub fn parse_section_type(section_type: u32) -> String {
+    match section_type {
+        0x00000000 => "SHT_NULL".to_string(),
+        0x00000001 => "SHT_PROGBITS".to_string(),
+        0x00000002 => "SHT_SYMTAB".to_string(),
+        0x00000003 => "SHT_STRTAB".to_string(),
+        0x00000004 => "SHT_RELA".to_string(),
+        0x00000005 => "SHT_HASH".to_string(),
+        0x00000006 => "SHT_DYNAMIC".to_string(),
+        0x00000007 => "SHT_NOTE".to_string(),
+        0x00000008 => "SHT_NOBITS".to_string(),
+        0x00000009 => "SHT_REL".to_string(),
+        0x0000000A => "SHT_SHLIB".to_string(),
+        0x0000000B => "SHT_DYNSYM".to_string(),
+        0x0000000E => "SHT_INIT_ARRAY".to_string(),
+        0x0000000F => "SHT_FINI_ARRAY".to_string(),
+        0x00000010 => "SHT_PREINIT_ARRAY".to_string(),
+        0x00000011 => "SHT_GROUP".to_string(),
+        0x00000012 => "SHT_SYMTAB_SHNDX".to_string(),
+        0x00000013 => "SHT_NUM".to_string(),
+        0x60000000 => "SHT_LOOS".to_string(),
+
+        // Match unknown segment type
+        _ => "UNKNOWN".to_string()
+    }
+}
+
+
+pub fn parse_section_flags(flags: u64) -> String {
+    match flags {
+        0x00000001 => "SHF_WRITE".to_string(),
+        0x00000002 => "SHF_ALLOC".to_string(),
+        0x00000004 => "SHF_EXECINSTR".to_string(),
+        0x00000010 => "SHF_MERGE".to_string(),
+        0x00000020 => "SHF_STRINGS".to_string(),
+        0x00000040 => "SHF_INFO_LINK".to_string(),
+        0x00000080 => "SHF_LINK_ORDER".to_string(),
+        0x00000100 => "SHF_OS_NONCONFORMING".to_string(),
+        0x00000200 => "SHF_GROUP".to_string(),
+        0x00000400 => "SHF_TLS".to_string(),
+        0x0FF00000 => "SHF_MASKOS".to_string(),
+        0xF0000000 => "SHF_MASKPROC".to_string(),
+        0x40000000 => "SHF_ORDERED".to_string(),
+        0x80000000 => "SHF_EXCLUDE".to_string(),
+
+        // Match unknown segment type
+        _ => "UNKNOWN".to_string()
+    }
+}
+
+
 pub fn parse_program_segment_type(segment_type: u32) -> String {
     match segment_type {
         0x00000000 => "PT_NULL".to_string(),
@@ -138,3 +284,47 @@ pub fn parse_program_segment_type(segment_type: u32) -> String {
         _ => "UNKNOWN".to_string()
     }
 }
+
+
+pub fn pp_file_header(header: &elf::FileHeader) {
+    println!("- Architecture: {:?}", header.arch);
+    println!("- Endian: {:?}", header.endian);
+    println!("- ABI: {}", header.abi_str);
+    println!("- Type: {}", parse_elf_type(header.elf_type));
+    println!("- ISA: {}", header.isa_str);
+    println!("- Entry Point: {:#04x}", header.entryoff);
+    println!("- Program Offset: {:#04x}", header.phoff);
+    println!("- Program Entry Size: {}", header.phentsize);
+    println!("- Number Program Entries: {}", header.phnum);
+    println!("- Section Offset: {:#04x}", header.shoff);
+    println!("- Section Entry Size: {}", header.shentsize);
+    println!("- Number Section Entries: {}", header.shnum);
+}
+
+
+pub fn pp_section_header(header: &elf::SectionHeader, number: i32, name: &String) {
+    println!("[{}] {}", number, name);
+    println!("\t- Type: {}", parse_section_type(header.section_type));
+    println!("\t- Flags: {}", parse_section_flags(header.flags));
+    println!("\t- Address: {:#04x}", header.section_type);
+    println!("\t- Offset: {:#04x}", header.section_type);
+    println!("\t- Link Index: {}", header.link);
+    println!("\t- Info Bytes: {}", header.info);
+    println!("\t- Alignment: {}", header.info);
+    println!();
+}
+
+
+pub fn pp_program_header(header: &elf::ProgramHeader, number: i32, ph_type: &String) {
+    println!("[{}] {}", number, ph_type);
+    println!("\t- Type: {}", parse_section_type(header.program_type));
+    println!("\t- Flags: {}", header.flags);
+    println!("\t- Offset: {:#04x}", header.offset);
+    println!("\t- Virtual Address: {:#04x}", header.vaddr);
+    println!("\t- Physical Address: {:#04x}", header.paddr);
+    println!("\t- File Size: {}", header.filesz);
+    println!("\t- Memory Size: {}", header.memsz);
+    println!("\t- Alignment: {}", header.align);
+    println!();
+}
+

test_run

@@ -1,104 +0,0 @@
-File exists, reading 'testing/hello'...
-Found ELF Magic Number...
-Parsing File Header...
-	- Found 13 program header entries 56 bytes in length
-	- Found 31 section header entries 64 bytes in length
-	- Found .shstrtab section at index 30
-FileHeader { arch: X86_64, is_x86_64: true, endian: Little, abi: 0, abi_str: "SystemV", elf_type: 3, isa: 62, isa_str: "AMD x86-64", entryoff: 4192, phoff: 64, shoff: 13976, ehsize: 64, phentsize: 56, phnum: 13, shentsize: 64, shnum: 31, shstrndx: 30 }
-
-Parsing Section Headers...
-	- Found .shstrtab section
-
-=== Sections ===
-[0] 
-SectionHeader { name: 0, section_type: 0, flags: 0, addr: 0, offset: 0, size: 0, link: 0, info: 0, addralign: 0, entsize: 0 }
-[1] .interp
-SectionHeader { name: 27, section_type: 1, flags: 2, addr: 792, offset: 792, size: 28, link: 0, info: 0, addralign: 1, entsize: 0 }
-[2] .note.gnu.property
-SectionHeader { name: 35, section_type: 7, flags: 2, addr: 824, offset: 824, size: 48, link: 0, info: 0, addralign: 8, entsize: 0 }
-[3] .note.gnu.build-id
-SectionHeader { name: 54, section_type: 7, flags: 2, addr: 872, offset: 872, size: 36, link: 0, info: 0, addralign: 4, entsize: 0 }
-[4] .note.ABI-tag
-SectionHeader { name: 73, section_type: 7, flags: 2, addr: 908, offset: 908, size: 32, link: 0, info: 0, addralign: 4, entsize: 0 }
-[5] .gnu.hash
-SectionHeader { name: 87, section_type: 1879048182, flags: 2, addr: 944, offset: 944, size: 36, link: 6, info: 0, addralign: 8, entsize: 0 }
-[6] .dynsym
-SectionHeader { name: 97, section_type: 11, flags: 2, addr: 984, offset: 984, size: 168, link: 7, info: 1, addralign: 8, entsize: 24 }
-[7] .dynstr
-SectionHeader { name: 105, section_type: 3, flags: 2, addr: 1152, offset: 1152, size: 143, link: 0, info: 0, addralign: 1, entsize: 0 }
-[8] .gnu.version
-SectionHeader { name: 113, section_type: 1879048191, flags: 2, addr: 1296, offset: 1296, size: 14, link: 6, info: 0, addralign: 2, entsize: 2 }
-[9] .gnu.version_r
-SectionHeader { name: 126, section_type: 1879048190, flags: 2, addr: 1312, offset: 1312, size: 48, link: 7, info: 1, addralign: 8, entsize: 0 }
-[10] .rela.dyn
-SectionHeader { name: 141, section_type: 4, flags: 2, addr: 1360, offset: 1360, size: 192, link: 6, info: 0, addralign: 8, entsize: 24 }
-[11] .rela.plt
-SectionHeader { name: 151, section_type: 4, flags: 66, addr: 1552, offset: 1552, size: 24, link: 6, info: 24, addralign: 8, entsize: 24 }
-[12] .init
-SectionHeader { name: 161, section_type: 1, flags: 6, addr: 4096, offset: 4096, size: 27, link: 0, info: 0, addralign: 4, entsize: 0 }
-[13] .plt
-SectionHeader { name: 156, section_type: 1, flags: 6, addr: 4128, offset: 4128, size: 32, link: 0, info: 0, addralign: 16, entsize: 16 }
-[14] .plt.got
-SectionHeader { name: 167, section_type: 1, flags: 6, addr: 4160, offset: 4160, size: 16, link: 0, info: 0, addralign: 16, entsize: 16 }
-[15] .plt.sec
-SectionHeader { name: 176, section_type: 1, flags: 6, addr: 4176, offset: 4176, size: 16, link: 0, info: 0, addralign: 16, entsize: 16 }
-[16] .text
-SectionHeader { name: 185, section_type: 1, flags: 6, addr: 4192, offset: 4192, size: 268, link: 0, info: 0, addralign: 16, entsize: 0 }
-[17] .fini
-SectionHeader { name: 191, section_type: 1, flags: 6, addr: 4460, offset: 4460, size: 13, link: 0, info: 0, addralign: 4, entsize: 0 }
-[18] .rodata
-SectionHeader { name: 197, section_type: 1, flags: 2, addr: 8192, offset: 8192, size: 18, link: 0, info: 0, addralign: 4, entsize: 0 }
-[19] .eh_frame_hdr
-SectionHeader { name: 205, section_type: 1, flags: 2, addr: 8212, offset: 8212, size: 52, link: 0, info: 0, addralign: 4, entsize: 0 }
-[20] .eh_frame
-SectionHeader { name: 219, section_type: 1, flags: 2, addr: 8264, offset: 8264, size: 172, link: 0, info: 0, addralign: 8, entsize: 0 }
-[21] .init_array
-SectionHeader { name: 229, section_type: 14, flags: 3, addr: 15800, offset: 11704, size: 8, link: 0, info: 0, addralign: 8, entsize: 8 }
-[22] .fini_array
-SectionHeader { name: 241, section_type: 15, flags: 3, addr: 15808, offset: 11712, size: 8, link: 0, info: 0, addralign: 8, entsize: 8 }
-[23] .dynamic
-SectionHeader { name: 253, section_type: 6, flags: 3, addr: 15816, offset: 11720, size: 496, link: 7, info: 0, addralign: 8, entsize: 16 }
-[24] .got
-SectionHeader { name: 171, section_type: 1, flags: 3, addr: 16312, offset: 12216, size: 72, link: 0, info: 0, addralign: 8, entsize: 8 }
-[25] .data
-SectionHeader { name: 262, section_type: 1, flags: 3, addr: 16384, offset: 12288, size: 16, link: 0, info: 0, addralign: 8, entsize: 0 }
-[26] .bss
-SectionHeader { name: 268, section_type: 8, flags: 3, addr: 16400, offset: 12304, size: 8, link: 0, info: 0, addralign: 1, entsize: 0 }
-[27] .comment
-SectionHeader { name: 273, section_type: 1, flags: 48, addr: 0, offset: 12304, size: 43, link: 0, info: 0, addralign: 1, entsize: 1 }
-[28] .symtab
-SectionHeader { name: 1, section_type: 2, flags: 0, addr: 0, offset: 12352, size: 864, link: 29, info: 18, addralign: 8, entsize: 24 }
-[29] .strtab
-SectionHeader { name: 9, section_type: 3, flags: 0, addr: 0, offset: 13216, size: 477, link: 0, info: 0, addralign: 1, entsize: 0 }
-[30] .shstrtab
-SectionHeader { name: 17, section_type: 3, flags: 0, addr: 0, offset: 13693, size: 282, link: 0, info: 0, addralign: 1, entsize: 0 }
-
-Parsing Program Segments...
-
-=== Program Segments ===
-[0] PT_PHDR
-ProgramHeader { program_type: 6, flags: 4, offset: 64, vaddr: 64, paddr: 64, filesz: 728, memsz: 728, align: 8 }
-[1] PT_INTERP
-ProgramHeader { program_type: 3, flags: 4, offset: 792, vaddr: 792, paddr: 792, filesz: 28, memsz: 28, align: 1 }
-[2] PT_LOAD
-ProgramHeader { program_type: 1, flags: 4, offset: 0, vaddr: 0, paddr: 0, filesz: 1576, memsz: 1576, align: 4096 }
-[3] PT_LOAD
-ProgramHeader { program_type: 1, flags: 5, offset: 4096, vaddr: 4096, paddr: 4096, filesz: 377, memsz: 377, align: 4096 }
-[4] PT_LOAD
-ProgramHeader { program_type: 1, flags: 4, offset: 8192, vaddr: 8192, paddr: 8192, filesz: 244, memsz: 244, align: 4096 }
-[5] PT_LOAD
-ProgramHeader { program_type: 1, flags: 6, offset: 11704, vaddr: 15800, paddr: 15800, filesz: 600, memsz: 608, align: 4096 }
-[6] PT_DYNAMIC
-ProgramHeader { program_type: 2, flags: 6, offset: 11720, vaddr: 15816, paddr: 15816, filesz: 496, memsz: 496, align: 8 }
-[7] PT_NOTE
-ProgramHeader { program_type: 4, flags: 4, offset: 824, vaddr: 824, paddr: 824, filesz: 48, memsz: 48, align: 8 }
-[8] PT_NOTE
-ProgramHeader { program_type: 4, flags: 4, offset: 872, vaddr: 872, paddr: 872, filesz: 68, memsz: 68, align: 4 }
-[9] UNKNOWN
-ProgramHeader { program_type: 1685382483, flags: 4, offset: 824, vaddr: 824, paddr: 824, filesz: 48, memsz: 48, align: 8 }
-[10] UNKNOWN
-ProgramHeader { program_type: 1685382480, flags: 4, offset: 8212, vaddr: 8212, paddr: 8212, filesz: 52, memsz: 52, align: 4 }
-[11] UNKNOWN
-ProgramHeader { program_type: 1685382481, flags: 6, offset: 0, vaddr: 0, paddr: 0, filesz: 0, memsz: 0, align: 16 }
-[12] UNKNOWN
-ProgramHeader { program_type: 1685382482, flags: 4, offset: 11704, vaddr: 15800, paddr: 15800, filesz: 584, memsz: 584, align: 1 }

test_run32

@@ -1,9 +0,0 @@
-File exists, reading 'testing/hello32'...
-Found ELF Magic Number...
-Parsing File Header...
-	- Found 11 program header entries 32 bytes in length
-	- Found 29 section header entries 40 bytes in length
-	- Found .shstrtab section at index 28
-FileHeader { arch: X86, is_x86_64: false, endian: Little, abi: 0, abi_str: "SystemV", elf_type: 3, isa: 3, isa_str: "Intel x86", entryoff: 223338303600, phoff: 59184649338932, shoff: 13780, ehsize: 52, phentsize: 32, phnum: 11, shentsize: 40, shnum: 29, shstrndx: 28 }
-
-Parsing Section Headers...

testing/flatfile

@@ -1 +1,3 @@
 hello world
+this flat file should fail
+because it doesn't have the ELF magic keyword

testing/src/isPrime.c

@@ -0,0 +1,32 @@
+#include <stdio.h>
+
+int main() {
+
+  int n, i, flag = 0;
+  printf("Enter a positive integer: ");
+  scanf("%d", &n);
+
+  // 0 and 1 are not prime numbers
+  // change flag to 1 for non-prime number
+  if (n == 0 || n == 1)
+    flag = 1;
+
+  for (i = 2; i <= n / 2; ++i) {
+
+    // if n is divisible by i, then n is not prime
+    // change flag to 1 for non-prime number
+    if (n % i == 0) {
+      flag = 1;
+      break;
+    }
+  }
+
+  // flag is 0 for prime numbers
+  if (flag == 0) {
+    printf("%d is a prime number.", n);
+  }
+  else {
+    printf("%d is not a prime number.", n);
+  }
+}
+