Consider this: A64 refers to the instruction set architecture, AArch64 is the 64-bit architecture, ARMv8/ARMv9 are also architectures, and TrustZone is a type of security architecture. Confused? What about ARM64? 1. ARMv7/ARMv8/ARMv9 are the true architectures of ARM. The term architecture can be understood as a technical specification, a technical reference, or a design; in … Read more
1. Development of the ARM Architecture The ARM architecture (Advanced RISC Machine) is a microprocessor architecture based on the principles of Reduced Instruction Set Computing (RISC), originally designed and launched by the British Acorn Computer Company in the late 1980s. The evolution of the ARM architecture is as follows: 1.1. Early Development (1980s-1990s) 1985: Acorn … Read more
This article provides a line-by-line explanation of the Armv8-A assembly code sourced from Arm® Development Studio. It focuses on the boot sequence of the AArch64 MPCore processor. This code initializes the system from Exception Level 3 (EL3, typically the Secure Monitor mode) and transitions to Exception Level 1 (EL1, typically the OS mode), during which … Read more
1 This Article's Purpose In using the Qiling simulation execution framework on the Windows platform, I encountered many difficulties, and some issues did not have solutions found through research. Therefore, I am writing this article, hoping it can provide some reference for everyone. The following points are listed as the content I want to express … Read more
Thought: A64 refers to the instruction set architecture, aarch64 is the 64-bit architecture, armv8/armv9 are also architectures, Trustzone is a type of security architecture, they are all architectures, confused? What is arm64? 1. armv7/armv8/armv9 are the real architectures of ARM. The term architecture can be understood as a technical specification, a technical reference, a design, … Read more
The previous article introduced the basic concepts of virtualization and hypervisors. To facilitate virtualization, ARM has done a lot of work, primarily defining four Exception Levels (EL). As mentioned in earlier articles about exceptions and privileges, I will elaborate a bit more here. Each exception level is numbered, ranging from EL0 to EL3, with higher … Read more