[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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

From: Peter Fillmore
Subject: Re: [Qemu-discuss] How do i tell QEMU that memory i've have mapped is code?
Date: Tue, 13 Jan 2015 10:18:31 +1100

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
                                //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 

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

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

Attachment: signature.asc
Description: Message signed with OpenPGP using GPGMail

reply via email to

[Prev in Thread] Current Thread [Next in Thread]