-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi there guys, a new day - a new question :)) I've been trying to figure out today how BUG() works, it is inline assembly, again: <from include/asm-i386/bug.h:12> 12 #if 1 /* Set to zero for a slightly smaller kernel */ 13 #define BUG() \ 14 __asm__ __volatile__( "ud2\n" \ 15 "\t.word %c0\n" \ 16 "\t.long %c1\n" \ 17 : : "i" (__LINE__), "i" (__FILE__)) I know that ud2 means undefined and generates invalid opcode exception, .word and .long are as directives, "i" as an input operand constraint is an immediate integer operand with constant value, but what I can't understand after looking into the as and gcc manuals is: 1. what does the c mean in the constraint %c0, %c1 resp.? 2. Where does the compiler get those __LINE__ and __FILE__ from? Thanks in advance for your patience, Boris. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) iD4DBQFA5S59iBySr3Fn37QRAkGEAJsHBryqVQ+0JMOss3VbwHCQ6XIIwQCY0w1J 1WsQ29Rtna0rQ7OQyb3AnA== =vvr7 -----END PGP SIGNATURE----- -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
