Re: Hello world example with qemu-system-arm

[Peter Maydell]

On Fri, 13 May 2022 at 23:59, James Gutbub <jgutbub@asu.edu> wrote:
>
> arm-none-eabi-as  -march=armv7-a startup.s -o startup.o
>
> arm-none-eabi-ld  startup.o -Map=test.map -o test.elf -e _Reset
>
>
>
> qemu-arm -cpu cortex-a7 -d in_asm,exec,cpu,int,unimp,guest_errors,nochain -D 
> test.log test.elf
>
>
>
> qemu-arm: Unable to reserve 0xffff0000 bytes of virtual address space at 
> 0x1000 (Permission denied) for use as guest address space (check your virtual 
> memory ulimit setting, min_mmap_addr or reserve less using -R option)

You don't say what's in your test.map, but it is probably
trying to put bits of the ELF file in places that make
qemu-arm's attempt to reserve address space unhappy.

'-R 0' will probably be enough to work around this.

-- PMM