On Fri, 2 Jul 2004 11:44:25 +0200, Borislav Petkov <borislav.petkov@t-online.de> wrote: > <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__)) [...] > 1. what does the c mean in the constraint %c0, %c1 resp.? I think this is not a contraint. It's a 'code'. In this case it means that the parameters 0 and 1 should not be treated as operands, but as (constant) data. At least that's what I understand from reading ``gcc/config/i386/i386.c'' (comment and code near the print_operand function) from the gcc sources. Try playing with `gcc -S` and `objdump -D` on a test file, that cleared things up a bit for me. More documentation on these 'codes' than the above-mentioned comment would be interesting though. -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
