Our First Program (PI5) - Versionsgeschichte

Satyria: /* Compiling the Program with Make */

2024-08-23T10:44:24Z

Compiling the Program with Make

← Nächstältere Version		Version vom 23. August 2024, 11:44 Uhr
Zeile 46:		Zeile 46:

	You can download the source code as a ZIP file from the following link: https://www.satyria.de/arm/sources/assem/first.zip		You can download the source code as a ZIP file from the following link: https://www.satyria.de/arm/sources/assem/first.zip
	{\|
	\|-		-----
	\| style="width: 33%; ~~text-align~~:~~left~~;" \| [[Working with Make and Linker Script\|< Back]] \|\| style="width: 33%" \|[[English\|^ Home]] \|\| style="width: 33%; text-align:right;" \| [[Making the LED Blink (PI5)\|Next >]]
			{\| style="width: 100%;
			\| style="width: 33%;" \| [[Working with Make and Linker Script\|< Back (Working with Make and Linker Script)]]
			\| style="width: 33%; text-align:center;" \| [[English\|< Home >]]
			\| style="width: 33%; text-align:right;" \| [[Making the LED Blink (PI5)\|Next (Making the LED Blink (PI5)) >]]
	\|}		\|}

Satyria: /* Compiling the Program with Make */

2024-08-22T07:26:20Z

Compiling the Program with Make

← Nächstältere Version		Version vom 22. August 2024, 08:26 Uhr
Zeile 46:		Zeile 46:

	You can download the source code as a ZIP file from the following link: https://www.satyria.de/arm/sources/assem/first.zip		You can download the source code as a ZIP file from the following link: https://www.satyria.de/arm/sources/assem/first.zip
			{\|
			\|-
			\| style="width: 33%; text-align:left;" \| [[Working with Make and Linker Script\|< Back]] \|\| style="width: 33%" \|[[English\|^ Home]] \|\| style="width: 33%; text-align:right;" \| [[Making the LED Blink (PI5)\|Next >]]
			\|}

Satyria: /* Compiling the Program with Make */

2024-08-19T19:24:08Z

Compiling the Program with Make

← Nächstältere Version		Version vom 19. August 2024, 20:24 Uhr
Zeile 44:		Zeile 44:
	make		make
	</syntaxhighlight>		</syntaxhighlight>

			You can download the source code as a ZIP file from the following link: https://www.satyria.de/arm/sources/assem/first.zip

Satyria: /* Compiling the Program */

2024-08-12T11:46:21Z

Compiling the Program

← Nächstältere Version		Version vom 12. August 2024, 12:46 Uhr
Zeile 37:		Zeile 37:

	'''aarch64-none-elf-objcopy''': Since the Raspberry Pi cannot understand the ELF file in its original state, this command converts the file into a binary format expected by the Raspberry Pi. The result is the file "kernel_2712.img".		'''aarch64-none-elf-objcopy''': Since the Raspberry Pi cannot understand the ELF file in its original state, this command converts the file into a binary format expected by the Raspberry Pi. The result is the file "kernel_2712.img".

			=== Compiling the Program with Make ===
			Previously, I described in "[[Working with Make and Linker Script]]" how to write a Makefile. With this Makefile, we can also compile this program if the files "Makefile" and "linker.ld" are present in the directory:

			<syntaxhighlight lang="shell">
			make
			</syntaxhighlight>

Satyria: /* Creating the Source Code */

2024-08-12T11:38:57Z

Creating the Source Code

← Nächstältere Version		Version vom 12. August 2024, 12:38 Uhr
Zeile 7:		Zeile 7:
	// 01.07.2024 www.satyria.de		// 01.07.2024 www.satyria.de
	//		//
	.section .init // Ensure the linker places this at the beginning of the kernel image		.section .init // Ensure the linker places this at the beginning of the kernel image
	.globl _start // Generates a global label		.globl _start // Generates a global label
	_start: // The label _start (entry address)		_start: // The label _start (entry address)

	b main // Branch to "main"		b main // Branch to "main"

	.section .text // Instruction to the linker that code is coming		.section .text // Instruction to the linker that code is coming

	main: // Create the label "main"		main: // Create the label "main"
	mov sp, #0x80000 // Create a stack of 512KB (524288 bytes)		mov sp, #0x80000 // Create a stack of 512KB (524288 bytes)
	MainLoop: // Infinite loop		MainLoop: // Infinite loop
	b MainLoop		b MainLoop
	</syntaxhighlight>		</syntaxhighlight>
	Save the file in the standard directory under Windows: C:\msys64\home\xxx (where xxx is usually your username). On Linux, you can save the file in your home directory. Name the file "first.S". The ".S" extension indicates the file is Assembly source code.		Save the file in the standard directory under Windows: C:\msys64\home\xxx (where xxx is usually your username). On Linux, you can save the file in your home directory. Name the file "first.S". The ".S" extension indicates the file is Assembly source code.

Satyria am 6. Juli 2024 um 18:23 Uhr

2024-07-06T18:23:48Z

← Nächstältere Version		Version vom 6. Juli 2024, 19:23 Uhr
Zeile 33:		Zeile 33:

	'''aarch64-none-elf-as''': Creates an object file (first.o) with the "-o" option. This is the first step, as the assembler might not have all the information yet.		'''aarch64-none-elf-as''': Creates an object file (first.o) with the "-o" option. This is the first step, as the assembler might not have all the information yet.

	'''aarch64-none-elf-ld''': The linker generates the actual machine code, combines information not declared in the code, and produces the file "first.elf".		'''aarch64-none-elf-ld''': The linker generates the actual machine code, combines information not declared in the code, and produces the file "first.elf".

	'''aarch64-none-elf-objcopy''': Since the Raspberry Pi cannot understand the ELF file in its original state, this command converts the file into a binary format expected by the Raspberry Pi. The result is the file "kernel_2712.img".		'''aarch64-none-elf-objcopy''': Since the Raspberry Pi cannot understand the ELF file in its original state, this command converts the file into a binary format expected by the Raspberry Pi. The result is the file "kernel_2712.img".

Satyria: Die Seite wurde neu angelegt: „Our first program will initially do nothing. It will simply run an infinite loop. This serves as a basic building block for all further experiments. I will explain how to create, compile, and run such a program. First, let's check if everything works. === Creating the Source Code === Open a text editor to write our first Assembly program: // // The first program // 01.07.2024 www.satyria.de // .section .init // Ensure the link…“

2024-07-06T18:22:49Z

Die Seite wurde neu angelegt: „Our first program will initially do nothing. It will simply run an infinite loop. This serves as a basic building block for all further experiments. I will explain how to create, compile, and run such a program. First, let's check if everything works. === Creating the Source Code === Open a text editor to write our first Assembly program: <syntaxhighlight lang="GAS"> // // The first program // 01.07.2024 www.satyria.de // .section .init // Ensure the link…“

Neue Seite

Our first program will initially do nothing. It will simply run an infinite loop. This serves as a basic building block for all further experiments. I will explain how to create, compile, and run such a program. First, let's check if everything works.
=== Creating the Source Code ===
Open a text editor to write our first Assembly program:
<syntaxhighlight lang="GAS">
//
// The first program
// 01.07.2024 www.satyria.de
//
.section .init // Ensure the linker places this at the beginning of the kernel image
.globl _start // Generates a global label
_start: // The label _start (entry address)

b main // Branch to "main"

.section .text // Instruction to the linker that code is coming

main: // Create the label "main"
mov sp, #0x80000 // Create a stack of 512KB (524288 bytes)
MainLoop: // Infinite loop
b MainLoop
</syntaxhighlight>
Save the file in the standard directory under Windows: C:\msys64\home\xxx (where xxx is usually your username). On Linux, you can save the file in your home directory. Name the file "first.S". The ".S" extension indicates the file is Assembly source code.

=== Compiling the Program ===
Assuming you have set up the programming environment as described in the "Setting Up the Programming Environment" chapter, to compile the program, open "msys2" on Windows (found in the Windows menu). On Linux, open the terminal.
Navigate to the home directory if you are not already there. You can do this with the command "cd ~". Use "ls" to display the directory contents.
Now, three commands are needed to compile the program:
<syntaxhighlight lang="shell">
aarch64-none-elf-as first.S -o first.o
aarch64-none-elf-ld --no-undefined first.o -o first.elf
aarch64-none-elf-objcopy first.elf -O binary kernel_2712.img
</syntaxhighlight>

'''aarch64-none-elf-as''': Creates an object file (first.o) with the "-o" option. This is the first step, as the assembler might not have all the information yet.
'''aarch64-none-elf-ld''': The linker generates the actual machine code, combines information not declared in the code, and produces the file "first.elf".
'''aarch64-none-elf-objcopy''': Since the Raspberry Pi cannot understand the ELF file in its original state, this command converts the file into a binary format expected by the Raspberry Pi. The result is the file "kernel_2712.img".