ARM架构是构建每个ARM处理器的基础。 目前最新的是ARM v8架构:http://www.arm.com/zh/products/processors/instruction-set-architectures/armv8-architecture.php ARMv8-A将64位架构支持引入ARM架构中,其中包括: 64位通用寄存器、SP(堆栈指针)和PC(程序计数器) 64位数据处理和扩展的虚拟寻址 两种主要执行状态: AA...
For that, the program needs to insert the SVC instruction into the code. This instruction has a parameter (for Thumb code 0-255) to select different SVC functions. The example generates SVC 0. But also have in mind, that other software components in the project may use this already. Selec...
ARM架构包含的异常生成指令有SVC,HVC,SMC。这些指令的目的仅仅是生成一个异常并使得PE能够在异常等级间切换: SVC(Supervisor Call)指令能使在EL0上的用户程序请求EL1上的OS服务 HVC(Hypervisor Call)指令(如果实现了虚拟化扩展则可用),使操作系统能够请求EL2上的Hypervisor服务 SMC(Secure Monitor Call)指令(如果实现...
参见ARM中的表R_RYXCL。在本例中，由于svc是来自使用AArch 64的较低异常级别的同步异常，因此偏移量...
should understand how to determine the actual cause of an exception by usingadditional resources, which might include special registers that contain fault status. For example, using the DFSR, DFAR to determine cause of a Data Abort or using the SPSR and LR to locate and retrieve SVC comment ...
understand how to determine the actual cause of an exception by using additional resources, which might include special registers that contain fault status. For example, using the DFSR, DFAR to determine cause of a Data Abort or using the SPSR and LR to locate and retrieve SVC comment field....
LDR SP,StackSvc ;设置中断模式堆栈 MSR CPSR_c,#0xD2 LDR SP,StackIrq … 1.3.6. ARM 伪指令 ARM 伪指令不是ARM 指令集中的指令,只是为了编程方便编译器定义了伪指令,使用时可以像其它ARM 指令一样使用,但在编译时这些指令将被等效的ARM 指令代替。ARM伪指令有四条,分别为ADR 伪指令、ADRL 伪指令、LDR...
When this example is built with: armclang--target=arm-arm-none-eabi -march=armv7-m-O1 -c foo.c -o foo.o The compiler generates code that moves the function parameters to registers R0-R3, and then inserts the SVC instruction inline, for both calls to svc_ahbCommand(), as can be se...
SUBS R3, R4, #5 ; 减法并更新标志位 LDRB R5, [R6, #-4]! ; 加载字节并自减基址 BX LR ; 返回 指令集版本差异 此文档覆盖了 ARMv7 及 ARMv8-A(AArch32)架构下的所有核心指令,包括数据处理、内存访问、跳转、协处理器及系统控制指令。
other functions, however, differences are hidden to the user. The ARMCC compiler handles the differences and generates code instructions to call SVC functions. SVC functions are called by executing the SVC instruction. When executing SVC instructions, the controller changes to the Privileged Handler ...