https://r0tbyt3.dev/tags/c-language/Recent content in C-Language on Jesus OsegueraHugoen-ushttps://r0tbyt3.dev/wiki/content/embedded-systems/c-language/accessing-memory-mapped-registers-with-pointers/Mon, 01 Jan 0001 00:00:00 +0000https://r0tbyt3.dev/wiki/content/embedded-systems/c-language/accessing-memory-mapped-registers-with-pointers/Accessing Memory-Mapped Registers with Pointers Accessing Memory-Mapped Registers with Pointers - technique for directly reading and writing hardware registers by casting their addresses to typed pointer types in C. Related Links: Bitwise Operators and Bit Manipulation Techniques Compiler Optimization Behavior and volatile Fixes Complex const and volatile Combinations Control Flow for Firmware Data Types, Variables, and Storage Class Specifiers Defensive C Patterns for Vulnerability Prevention ELF File Format, Symbols, Sections, and Segments Functions and Modular Firmware Design Pointers and Casting in Embedded C Register Definitions with C Structures Relocation, Linking, Literal Pools, and Veneers Structures, Bitfields, Unions, and Bit Extraction Toolchain Fundamentalshttps://r0tbyt3.dev/wiki/content/embedded-systems/c-language/bitwise-operators-and-bit-manipulation-techniques/Mon, 01 Jan 0001 00:00:00 +0000https://r0tbyt3.dev/wiki/content/embedded-systems/c-language/bitwise-operators-and-bit-manipulation-techniques/Bitwise Operators and Bit Manipulation Techniques Bitwise Operators and Bit Manipulation Techniques - operators and patterns for reading, setting, clearing, and toggling individual bits in registers and data fields. Related Links: Accessing Memory-Mapped Registers with Pointers Compiler Optimization Behavior and volatile Fixes Complex const and volatile Combinations Control Flow for Firmware Data Types, Variables, and Storage Class Specifiers Defensive C Patterns for Vulnerability Prevention ELF File Format, Symbols, Sections, and Segments Functions and Modular Firmware Design Pointers and Casting in Embedded C Register Definitions with C Structures Relocation, Linking, Literal Pools, and Veneers Structures, Bitfields, Unions, and Bit Extraction Toolchain Fundamentalshttps://r0tbyt3.dev/wiki/content/embedded-systems/c-language/Mon, 01 Jan 0001 00:00:00 +0000https://r0tbyt3.dev/wiki/content/embedded-systems/c-language/C Language for Embedded Systems C Language for Embedded Systems - the programming language commonly used for developing software for embedded systems due to its efficiency and low-level control. (Note: This is different from application-level C programming, which may involve higher-level abstractions and libraries.) Accessing Memory-Mapped Registers with Pointers Bitwise Operators and Bit Manipulation Techniques Compiler Optimization Behavior and volatile Fixes Complex const and volatile Combinations Control Flow for Firmware Data Types, Variables, and Storage Class Specifiers Defensive C Patterns for Vulnerability Prevention ELF File Format, Symbols, Sections, and Segments Functions and Modular Firmware Design Pointers and Casting in Embedded C Register Definitions with C Structures Relocation, Linking, Literal Pools, and Veneers Structures, Bitfields, Unions, and Bit Extraction Toolchain Fundamentals Related Links: Embedded Systems Architectures Embedded Systems Communication Protocols Embedded Systems Execution Models Embedded Systems Exploits Embedded Systems Hardware Embedded Systems Runtime View STM32 Microcontrollershttps://r0tbyt3.dev/wiki/content/embedded-systems/c-language/compiler-optimization-behavior-and-volatile-fixes/Mon, 01 Jan 0001 00:00:00 +0000https://r0tbyt3.dev/wiki/content/embedded-systems/c-language/compiler-optimization-behavior-and-volatile-fixes/Compiler Optimization Behavior and volatile Fixes Compiler Optimization Behavior and volatile Fixes - how compilers reorder or eliminate memory accesses and how the volatile qualifier prevents such optimizations on hardware-mapped variables. Related Links: Accessing Memory-Mapped Registers with Pointers Bitwise Operators and Bit Manipulation Techniques Complex const and volatile Combinations Control Flow for Firmware Data Types, Variables, and Storage Class Specifiers Defensive C Patterns for Vulnerability Prevention ELF File Format, Symbols, Sections, and Segments Functions and Modular Firmware Design Pointers and Casting in Embedded C Register Definitions with C Structures Relocation, Linking, Literal Pools, and Veneers Structures, Bitfields, Unions, and Bit Extraction Toolchain Fundamentalshttps://r0tbyt3.dev/wiki/content/embedded-systems/c-language/complex-const-and-volatile-combinations/Mon, 01 Jan 0001 00:00:00 +0000https://r0tbyt3.dev/wiki/content/embedded-systems/c-language/complex-const-and-volatile-combinations/Complex const and volatile Combinations Complex const and volatile Combinations - combined use of const and volatile qualifiers to model read-only hardware registers and shared data in embedded C. Related Links: Accessing Memory-Mapped Registers with Pointers Bitwise Operators and Bit Manipulation Techniques Compiler Optimization Behavior and volatile Fixes Control Flow for Firmware Data Types, Variables, and Storage Class Specifiers Defensive C Patterns for Vulnerability Prevention ELF File Format, Symbols, Sections, and Segments Functions and Modular Firmware Design Pointers and Casting in Embedded C Register Definitions with C Structures Relocation, Linking, Literal Pools, and Veneers Structures, Bitfields, Unions, and Bit Extraction Toolchain Fundamentalshttps://r0tbyt3.dev/wiki/content/embedded-systems/c-language/control-flow-for-firmware/Mon, 01 Jan 0001 00:00:00 +0000https://r0tbyt3.dev/wiki/content/embedded-systems/c-language/control-flow-for-firmware/Control Flow for Firmware Control Flow for Firmware - use of conditionals, loops, and switch statements in firmware, including considerations for deterministic execution and avoiding undefined behavior. Related Links: Accessing Memory-Mapped Registers with Pointers Bitwise Operators and Bit Manipulation Techniques Compiler Optimization Behavior and volatile Fixes Complex const and volatile Combinations Data Types, Variables, and Storage Class Specifiers Defensive C Patterns for Vulnerability Prevention ELF File Format, Symbols, Sections, and Segments Functions and Modular Firmware Design Pointers and Casting in Embedded C Register Definitions with C Structures Relocation, Linking, Literal Pools, and Veneers Structures, Bitfields, Unions, and Bit Extraction Toolchain Fundamentalshttps://r0tbyt3.dev/wiki/content/embedded-systems/c-language/data-types-variables-and-storage-class-specifiers/Mon, 01 Jan 0001 00:00:00 +0000https://r0tbyt3.dev/wiki/content/embedded-systems/c-language/data-types-variables-and-storage-class-specifiers/Data Types, Variables, and Storage Class Specifiers Data Types, Variables, and Storage Class Specifiers - fixed-width integer types, alignment, storage classes (auto, static, extern, register), and their impact on memory layout. Related Links: Accessing Memory-Mapped Registers with Pointers Bitwise Operators and Bit Manipulation Techniques Compiler Optimization Behavior and volatile Fixes Complex const and volatile Combinations Control Flow for Firmware Defensive C Patterns for Vulnerability Prevention ELF File Format, Symbols, Sections, and Segments Functions and Modular Firmware Design Pointers and Casting in Embedded C Register Definitions with C Structures Relocation, Linking, Literal Pools, and Veneers Structures, Bitfields, Unions, and Bit Extraction Toolchain Fundamentalshttps://r0tbyt3.dev/wiki/content/embedded-systems/c-language/defensive-c-patterns-for-vulnerability-prevention/Mon, 01 Jan 0001 00:00:00 +0000https://r0tbyt3.dev/wiki/content/embedded-systems/c-language/defensive-c-patterns-for-vulnerability-prevention/Defensive C Patterns for Vulnerability Prevention Defensive C Patterns for Vulnerability Prevention - coding practices that reduce common firmware vulnerabilities such as buffer overflows, integer wrapping, and uninitialized memory use. Related Links: Accessing Memory-Mapped Registers with Pointers Bitwise Operators and Bit Manipulation Techniques Compiler Optimization Behavior and volatile Fixes Complex const and volatile Combinations Control Flow for Firmware Data Types, Variables, and Storage Class Specifiers ELF File Format, Symbols, Sections, and Segments Functions and Modular Firmware Design Pointers and Casting in Embedded C Register Definitions with C Structures Relocation, Linking, Literal Pools, and Veneers Structures, Bitfields, Unions, and Bit Extraction Toolchain Fundamentalshttps://r0tbyt3.dev/wiki/content/embedded-systems/c-language/elf-file-format-symbols-sections-and-segments/Mon, 01 Jan 0001 00:00:00 +0000https://r0tbyt3.dev/wiki/content/embedded-systems/c-language/elf-file-format-symbols-sections-and-segments/ELF File Format, Symbols, Sections, and Segments ELF File Format, Symbols, Sections, and Segments - structure of ELF binaries produced by the toolchain, including .text, .data, .bss sections and symbol table layout. Related Links: Accessing Memory-Mapped Registers with Pointers Bitwise Operators and Bit Manipulation Techniques Compiler Optimization Behavior and volatile Fixes Complex const and volatile Combinations Control Flow for Firmware Data Types, Variables, and Storage Class Specifiers Defensive C Patterns for Vulnerability Prevention Functions and Modular Firmware Design Pointers and Casting in Embedded C Register Definitions with C Structures Relocation, Linking, Literal Pools, and Veneers Structures, Bitfields, Unions, and Bit Extraction Toolchain Fundamentalshttps://r0tbyt3.dev/wiki/content/embedded-systems/c-language/functions-and-modular-firmware-design/Mon, 01 Jan 0001 00:00:00 +0000https://r0tbyt3.dev/wiki/content/embedded-systems/c-language/functions-and-modular-firmware-design/Functions and Modular Firmware Design Functions and Modular Firmware Design - function declarations, calling conventions, stack usage, and techniques for organizing firmware into reusable modules. Related Links: Accessing Memory-Mapped Registers with Pointers Bitwise Operators and Bit Manipulation Techniques Compiler Optimization Behavior and volatile Fixes Complex const and volatile Combinations Control Flow for Firmware Data Types, Variables, and Storage Class Specifiers Defensive C Patterns for Vulnerability Prevention ELF File Format, Symbols, Sections, and Segments Pointers and Casting in Embedded C Register Definitions with C Structures Relocation, Linking, Literal Pools, and Veneers Structures, Bitfields, Unions, and Bit Extraction Toolchain Fundamentalshttps://r0tbyt3.dev/wiki/content/embedded-systems/c-language/pointers-and-casting-in-embedded-c/Mon, 01 Jan 0001 00:00:00 +0000https://r0tbyt3.dev/wiki/content/embedded-systems/c-language/pointers-and-casting-in-embedded-c/Pointers and Casting in Embedded C Pointers and Casting in Embedded C - pointer arithmetic, void pointers, and type casting used to access hardware registers and manipulate raw memory. Related Links: Accessing Memory-Mapped Registers with Pointers Bitwise Operators and Bit Manipulation Techniques Compiler Optimization Behavior and volatile Fixes Complex const and volatile Combinations Control Flow for Firmware Data Types, Variables, and Storage Class Specifiers Defensive C Patterns for Vulnerability Prevention ELF File Format, Symbols, Sections, and Segments Functions and Modular Firmware Design Register Definitions with C Structures Relocation, Linking, Literal Pools, and Veneers Structures, Bitfields, Unions, and Bit Extraction Toolchain Fundamentalshttps://r0tbyt3.dev/wiki/content/embedded-systems/c-language/register-definitions-with-c-structures/Mon, 01 Jan 0001 00:00:00 +0000https://r0tbyt3.dev/wiki/content/embedded-systems/c-language/register-definitions-with-c-structures/Register Definitions with C Structures Register Definitions with C Structures - use of structs and bitfields to model memory-mapped peripheral register blocks with named field access. Related Links: Accessing Memory-Mapped Registers with Pointers Bitwise Operators and Bit Manipulation Techniques Compiler Optimization Behavior and volatile Fixes Complex const and volatile Combinations Control Flow for Firmware Data Types, Variables, and Storage Class Specifiers Defensive C Patterns for Vulnerability Prevention ELF File Format, Symbols, Sections, and Segments Functions and Modular Firmware Design Pointers and Casting in Embedded C Relocation, Linking, Literal Pools, and Veneers Structures, Bitfields, Unions, and Bit Extraction Toolchain Fundamentalshttps://r0tbyt3.dev/wiki/content/embedded-systems/c-language/relocation-linking-literal-pools-and-veneers/Mon, 01 Jan 0001 00:00:00 +0000https://r0tbyt3.dev/wiki/content/embedded-systems/c-language/relocation-linking-literal-pools-and-veneers/Relocation, Linking, Literal Pools, and Veneers Relocation, Linking, Literal Pools, and Veneers - how the linker resolves symbol references, manages literal pools, and inserts veneers for out-of-range branches. Related Links: Accessing Memory-Mapped Registers with Pointers Bitwise Operators and Bit Manipulation Techniques Compiler Optimization Behavior and volatile Fixes Complex const and volatile Combinations Control Flow for Firmware Data Types, Variables, and Storage Class Specifiers Defensive C Patterns for Vulnerability Prevention ELF File Format, Symbols, Sections, and Segments Functions and Modular Firmware Design Pointers and Casting in Embedded C Register Definitions with C Structures Structures, Bitfields, Unions, and Bit Extraction Toolchain Fundamentalshttps://r0tbyt3.dev/wiki/content/embedded-systems/c-language/structures-bitfields-unions-and-bit-extraction/Mon, 01 Jan 0001 00:00:00 +0000https://r0tbyt3.dev/wiki/content/embedded-systems/c-language/structures-bitfields-unions-and-bit-extraction/Structures, Bitfields, Unions, and Bit Extraction Structures, Bitfields, Unions, and Bit Extraction - aggregate data types used to model packed hardware data, protocol frames, and register overlays. Related Links: Accessing Memory-Mapped Registers with Pointers Bitwise Operators and Bit Manipulation Techniques Compiler Optimization Behavior and volatile Fixes Complex const and volatile Combinations Control Flow for Firmware Data Types, Variables, and Storage Class Specifiers Defensive C Patterns for Vulnerability Prevention ELF File Format, Symbols, Sections, and Segments Functions and Modular Firmware Design Pointers and Casting in Embedded C Register Definitions with C Structures Relocation, Linking, Literal Pools, and Veneers Toolchain Fundamentalshttps://r0tbyt3.dev/wiki/content/embedded-systems/c-language/toolchain-fundamentals/Mon, 01 Jan 0001 00:00:00 +0000https://r0tbyt3.dev/wiki/content/embedded-systems/c-language/toolchain-fundamentals/Toolchain Fundamentals Toolchain Fundamentals - components of the embedded C toolchain including the compiler, assembler, linker, and object file utilities. Related Links: Accessing Memory-Mapped Registers with Pointers Bitwise Operators and Bit Manipulation Techniques Compiler Optimization Behavior and volatile Fixes Complex const and volatile Combinations Control Flow for Firmware Data Types, Variables, and Storage Class Specifiers Defensive C Patterns for Vulnerability Prevention ELF File Format, Symbols, Sections, and Segments Functions and Modular Firmware Design Pointers and Casting in Embedded C Register Definitions with C Structures Relocation, Linking, Literal Pools, and Veneers Structures, Bitfields, Unions, and Bit Extraction