dont get confused its simple !! everyting is in the name itself :: -------------------------->inc addresses LOW HIGH address +------------------------------------+ LSB(Note here) MSB :Little endian MSB LSB (note here) : Big endian
Hope that helps, Onkar Little(at what address ??? larger or smaller ? ) endian(this refers to LSB) On Jan 23, 2008 1:17 PM, vichy < [EMAIL PROTECTED]> wrote: > Dear all: > > While studying the kernel source code, I always confused with the Endian > Order. > > I have studied the article about Endian order on the net. > > Usually they gave an example as below: > > > > A 4 byte LongInt > > 0xabcdefgh > > will be arranged in memory as follows: > > Base Address+0 gh > > Base Address+1 ef > > Base Address+2 cd > > Base Address+3 ab > > > > But what is the correct unit I should take to interpret the content of > memory? > > I purposely use data not 4-bytes alignment in the following questions. > > > > Question 1: > > What does the memory arrangement look like as the value is 0xcdef34? > > Will it be > > Base Address+0 34 > > Base Address+1 ef > > Base Address+2 cd > > > > Question 2: > > if the answer of Q1 is right and some document tells me that > > offset 0 i/o address > > offset 3 i/o value > > and I got the memory content as > > Base Address+0 23 > > Base Address+1 45 > > Base Address+2 ef > > Base Address+3 df > > Base Address+4 02 > > Base Address+5 01 > > > > Does that mean the i/o address is 0xef4523 and i/o value is 0x0102df? > > > > Question 3: > > If I got a big array which represents a large number like below: > > static unsigned char n[] = > > "\x00\xAA\x36\xAB\xCE\x88\xAC\xFD\xFF\x55\x52\x3C\x7F\xC4\x52\x3F" > > "\x90\xEF\xA0\x0D\xF3\x77\x4A\x25\x9F\x2E\x62\xB4\xC5\xD9\x9C\xB5" > > "\xAD\xB3\x00\xA0\x28\x5E\x53\x01\x93\x0E\x0C\x70\xFB\x68\x76\x93" > > "\x9C\xE6\x16\xCE\x62\x4A\x11\xE0\x08\x6D\x34\x1E\xBC\xAC\xA0\xA1" > > "\xF5"; > > > > Should the value be 0xF5A1A0ACBc …….., from 0xn[end] ~ n[0], just like > little-endian order, or 0x00AA36AB….F5, just like big-endian order. > > Or this value will be different under different machine even it is a c > source code. > > > > Appreciate your help, > > vichy > > > > > > > > > > >
