Hi, These two links wud help u http://www.rdrop.com/~cary/html/endian_faq.html - Endianess FAQ http://www.linuxjournal.com/article.php?sid=6788 - Bit Endianess 1) i read somewhere on the net, that a processor can be set to either Little endian or Big endian, configurable ? AFAIK all the ARM processors are configurable to both Little Endian and Big Endian mode Hope this Helps, Rgds Anand -----Original Message----- From: kernelnewbies-bounce@nl.linux.org [mailto:kernelnewbies-bounce@nl.linux.org]On Behalf Of amith Sent: Thursday, July 08, 2004 12:37 PM To: KERNEL Subject: [Fwd: Endian'ess.] -------- Original Message -------- Subject: Endian'ess. Date: Thu, 08 Jul 2004 12:30:56 +0530 From: amith <amith@multitech.co.in> To: KERNEL <kernelnewbies@nl.linux.org> Hi all , a little off-topic. #include #include typedef struct test { unsigned short w1; unsigned short w2; }Test; Test t1; unsigned long temp = 0x12345678; main() { printf(" sizeof(Test) = %d\n",sizeof(Test)); memcpy(&t1,&temp,4); printf(" t1.w1 = %X \n",t1.w1); printf(" t1.w2 = %X \n",t1.w2); printf(" &t1.w1 = %X \n",&t1.w1); printf(" t1.w2 = %X \n",&t1.w2); } output: t1.w1 = 5678 Typo > t1.w1 = 1234 shud be > t1.w2 = 1234 &t1.w1 = 6004 Typo > &t1.w1 = 6006 shud be >&t1.w2 = 6006. i tried the above code on x86 and ARM , both gave me the same results. Both x86 and ARM are little-endian , or arent they? . Could someone explain this result with respect to the definition of Little Endian . which goes (one of them) as : Little Endian: the least significant byte of a multi-byte data field is stored in the lowest memmory address. Now, i have a couple of doubts : 1) i read somewhere on the net, that a processor can be set to either Little endian or Big endian, configurable ? 2) Could someone explain this with respect to the Little Endian definition given above. 6004 6006 _________________ | 5678 | 1234 | |________|________ | t1.w1 t1.w2 Any good links to the Endianess would be great. thanks. cheers, Amith -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/ -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
