On 8/19/21 6:54 PM, Lloyd wrote:
Hi,
I am trying to print the address of consecutive locations in a
memory allocated using kmalloc. It prints non contiguous addresses! I
tried with kmalloc_array, and normal array on stack, I got the same
result. May I know the reason? The code fragment for array and result
are given below.
uint8_t MyArray[100]={'0'};
printk(KERN_INFO "\nAddress is-> %p\n",&MyArray[0]);
printk(KERN_INFO "\nAddress is-> %p\n",&MyArray[1]);
printk(KERN_INFO "\nAddress is-> %p\n",&MyArray[2]);
[ 8684.613909] Address is-> 00000000b3330991
[ 8684.613914] Address is-> 000000000519068c
[ 8684.613915] Address is-> 00000000e448ca76
Quoted from Documentation/core-api/printk-formats.rst:
A raw pointer value may be printed with %p which will hash the address
before printing. The kernel also supports extended specifiers for printing
pointers of different types.
So the address printed neither logical nor physical address.
Thanks a lot,
Lloyd
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