SUB R0, R0, #FIQ_Stack_Size ; Enter IRQ Mode and set its Stack Pointer MSR CPSR_c, #Mode_IRQ:OR:I_Bit:OR:F_Bit MOV SP, R0 SUB R0, R0, #IRQ_Stack_Size ; Enter Supervisor Mode and set its Stack Pointer MSR CPSR_c, #Mode_SVC:OR:I_Bit:OR:F_Bit MOV SP, R0 SUB R0, R0...
不过这里do_softirq 并不是在kernel/softirq.c 中定义的那个,因为宏__ARCH_HAS_DO_SOFTIRQ 在x86下被定义了,所以真正的do_softirq在arch/x86/kernel/irq_32.c : asmlinkage void do_softirq(void){unsigned long flags;struct thread_info *curctx;union irq_ctx *irqctx;u32 *isp;if (in_interrupt())re...
set_saved_sp sp, t0, t1 PTR_SUBU sp,4*SZREG # init stack pointer jstart_kernelEND(kernel_entry) ... 最终跳到kernel_entry中,该函数在~/openwrt1407/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.10.49/init/main.c中定义: asmlinkagevoid__init start_kernel(void...
set_saved_sp sp, t0, t1 PTR_SUBU sp,4*SZREG # init stack pointer jstart_kernelEND(kernel_entry) ... 最终跳到kernel_entry中,该函数在~/openwrt1407/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.10.49/init/main.c中定义: asmlinkagevoid__init start_kernel(void...
初始栈指针（Initial Stack Pointer）复位（Reset）NMI（Non-Maskable Interrupt）Hard Fault等 STM32特定...
linux中断处理之IRQ中断 linux中断处理之IRQ中断 一:前言 在前一个专题里曾分析过所有IRQ中断处理流程,经过SAVE_ALL保存硬件环境后,都会进入 do_IRQ()进行处理,今天接着分析do_IRQ()处理的相关东西.分为两部中断处理程序与软中断两个大的部份进行介绍.二:中断处理程序 在驱动程序中,通常使用request_irq()来注册...
irqctx->tinfo.real_stack = curctx->tinfo.real_stack; irqctx->tinfo.virtual_stack = curctx->tinfo.virtual_stack; irqctx->tinfo.previous_esp = current_stack_pointer(); *--isp = (u32) action; *--isp = (u32) ®s; *--isp = (u32) irq; ...
855 moveq r1,sp // save old stack pointer 856 ldreq sp,.__interrupt_stack 857 stmeqfd sp!,{r1} 858 10: 859 #endif 860 如果irq_level在加1前的值為0(即表明中斷未嵌套),把sp設置為__interrupt_stack,並把舊的sp值壓棧保存,從當前開始,堆棧從線程堆棧切換到中斷堆棧。如果中斷嵌套,則表明當前...
@ from the exception stack @ @ We are now ready to fill in the remaining blanks on the stack: @ @ r2 - lr_<exception>, already fixed up for correct return/restart @ r3 - spsr_<exception> @ r4 - orig_r0 (see pt_regs definition in ptrace.h) ...
ldr x23, [sp, #S_SP] // load return stack pointer msr sp_el0, x23 #ifdef CONFIG_ARM64_ERRATUM_845719 alternative_if ARM64_WORKAROUND_845719 tbz x22, #4, 1f #ifdef CONFIG_PID_IN_CONTEXTIDR mrs x29, contextidr_el1 msr contextidr_el1, x29 ...