Re: [Qemu-discuss] How do i tell QEMU that memory i've have mapped is code?

[Peter Fillmore]

The setup code is <edited for brevity>:
        MemoryRegion *sysmem = get_system_memory(); 
        MemoryRegion *iap = g_new(MemoryRegion, 1);                             
        //create pointer for region
        memory_region_init_ram(iap, NULL, "vivotech.iap", 0x1000,&error_abort); 
//init 0x1000 bytes of ram
        vmstate_register_ram_global(iap);                                       
                                //register with qemu
        memory_region_add_subregion(sysmem, 0x7FFFFFF0, iap);                   
//add to the sysmem

I have also previous allocated 512KB of pflash at 0x00 and 64KB of RAM at 
0x40000000

The code starts fine - i just get an access violation at 0x7FFFFFF0 when it 
jumps to that point. Dumping memory contains the correct instructions.

Regards,
-------------------------------------------------------
Peter Fillmore
Principle Consultant, CISSP
Payment Security Consulting



On 13 Jan 2015, at 8:22 am, Peter Maydell <address@hidden> wrote:

> On 12 January 2015 at 00:44, Peter Fillmore <address@hidden> wrote:
>> heres the code which creates the memory (contained in a custom driver):
>> 
>>> memory_region_init_ram(&s->iomem, OBJECT(dev), "arm-lpc213x-iap", 0x1000, 
>>> NULL);
>>> sysbus_init_mmio(sd, &s->iomem);
>>> char *memptr = memory_region_get_ram_ptr(&s->iomem) ;
>>> memcpy(memptr,iapcode, sizeof(iapcode));
> 
> Have you remembered to actually map the RAM MemoryRegion into
> system memory at the right address?
> 
> -- PMM

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