I also faced the same problem. I emulated cortex m3 in qemu ( $qemu- system-arm -M lm3s811evb -monitor stdio -kernel out.elf -s -S -gdb tcp::53333 ) and arm-none-linux-gnueabi-gdb --command=./gdbinit
and my gdbinit is below set verbose on set solib-absolute-prefix nonexistantpath set solib-search-path /root/CodeSourcery/Sourcery_G++_Lite/arm-none-linux-gnueabi/libc/lib file out.elf target remote localhost:53333 set remote exec-file out.elf I didn't use any standard library. Instead I wrote a simple code referring the cortex-m3 manual. The bug section is given below. /**** code part *****/ #define SysTick ( (SysTickTemplate*) 0xE000E010 ) // as in the datasheet typedef struct { volatile unsigned int CTRL; volatile unsigned int LOAD; volatile unsigned int VAL; volatile unsigned int CALIB; } SysTickTemplate; init() { SysTick->CTRL = 0x4; SysTick->LOAD = 8000000; /* Frequency of 1 Hz */ SysTick->CTRL |= 1; /* Enable counter */ SysTick->CTRL |= 2; /* Enable interrupts */ /* here it hangs, even ctrl+C wont work here */ int c = 0; /* codes....*/ } The same program I used to port into LPC1343 with a SysTickHandler() to toggle an LED and there it worked. Any help is appreciated, Arun -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/696094 Title: TI Stellaris lm3s811evb (ARM Cortex-M3) : Systick interrupt not working Status in QEMU: Incomplete Bug description: I've tried to create a small project that uses the CMSIS as base library. The problem is that the SysTick_interrupt_handler() doesn't get executed when the systick event is detected in QEMU. Furthermore, it seems asif QEMU gets stuck in an endless loop. QEMU doesn't respond to Ctrl-C on the command line and the GDB session also stalls. 'kill -9' is the only way to stop QEMU. It seems asif the initialisation of the NVIC works fine. I've traced the function calls in QEMU as follows: stellaris.c: stellaris_init() - Perform generic armv7 init: armv7m_init() armv7m.c: armv7m_init() - Create and init the nvic: nvic = qdev_create(NULL, "armv7m_nvic"); env->nvic = nvic; qdev_init_nofail(nvic); - Configure the programmable interrupt controller: Call: arm_pic_init_cpu() qemu_allocate_irqs(arm_pic_cpu_handler) - Initialise 64 interrupt structures. The following call sequence is observed when the systick event occur: armv7m_nvic.c: systick_timer_tick(): set pending interrupt armv7m_nvic.c: armv7m_nvic_set_pending() for irq:15 arm_gic.c: gic_set_pending_private(): GIC_SET_PENDING(15,) arm_gic.c: gic_update() - Raise IRQ with qemu_set_irq() irq.c: eqmu_set_irq() - Call the irq->handler -- I assume the irq handler is 'arm_pic_cpu_handler()', since that was passed as the parameter when qemu_allocate_irqs() was called in ... arm_pic.c: arm_pic_cpu_handler() - After evaluation, call cpu_interrupt() exec.c: cpu_interrupt() is called. The tools that were used during the testing of this project: GCC: Codesourcery ARM eabi 2010q3 QEMU: Checked out on 31/12/2010 - Last commit: 0fcec41eec0432c77645b4a407d3a3e030c4abc4 The project files are attached, for reproducing of the errors. Note: The CMSIS wants to perform byte accesses to the NVIC. For the Cortex-M3, unaligned 8 bit and 16 bit accesses are allowed. The current QEMU implementation doesn't yet cater for it. As a work around, updated versions of arm_gic.c armv7m_nvic.h armv7m_nvic.c is also included. Launch project with: go_gdb.sh Attach debugger with: arm-none-eabi-gdbtui --command=gdbCommands_tui (s = step, n = next, c = continue, Ctrl-C = stop, print <variable> to look at variable contents) To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/696094/+subscriptions