Aubrey Li wrote:
> On 8/27/07, Aubrey Li <[EMAIL PROTECTED]> wrote:
>> Hi all,
>>
>> I need to access physical memory from userspace, the following
>> implementation doesn't work if offset < 0x400000.
>>
>> open("/dev/mem", O_RDONLY)
>> mmap(0, len, PROT_READ,MAP_SHARED, fd, offset)
>>
>> However, I happened to get a program to access lower physical memory
>> successfully.
>> ====truss output====
>> open("/dev/xsvc", O_RDONLY) = 3
>> mmap(0x00000000, 131072, PROT_READ, MAP_SHARED|MAP_NORESERVE, 3,
>> 917504) = 0xFEE5E000
>>
>> But it doesn't work when I paste it to my C file. What did I miss? how
>> to access physical memory from userspace without restriction?
>>
> err..., I think I figured it out. Actually opening "/dev/xsvc" is the
> right way to solve this issue.
>
> -Aubrey
I believe /dev/mem should work, but...it's always been limited to "only
actual memory" on Solaris.
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