Genisoimage on OSX

[zhiayang]

So I just (attempted to) move development to osx (was running linux in VM before), and I'm stuck: How do I get the genisoimage command? I'm currently using GRUB eltorito for booting my kernel.

Also, I get this warning from gcc (cross compiler) which I didn't have in linux (non cross compiler)

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note: if this code is reached, the program will abort.

from this code:

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void kprintf(char str[], ...)
{
   va_list listptr;
   va_start(listptr, str);
   
   short is_percent = 0;
   
   register int i = 0;
   for(; i < strlen(str); i++)
   {
      if(str[i] == '%')
      {
         is_percent = 1;
         continue;
      }   
      if(is_percent)
      {
         switch(str[i])
         {
            case 'd':
               putnum(va_arg(listptr, int));
               break;
               
            case 'c':
               putch(va_arg(listptr, unsigned char));      //Faulty line, all others work.
               break;               
                     
            case 'x':
               puthex(va_arg(listptr, unsigned int));
               break;      
               
            case 's':
               puts(va_arg(listptr, char*));
               break;
               
            case 'u':
               putunum(va_arg(listptr, unsigned long));
               break;
         }
         is_percent = 0;
      }      
      else
      {
         putch(str[i]);
      }
   }
}

Yes, I do have va_list etc defined, as such:

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#define va_start(v,l) __builtin_va_start(v,l)
#define va_arg(v,l)   __builtin_va_arg(v,l)
#define va_end(v)     __builtin_va_end(v)
#define va_copy(d,s)  __builtin_va_copy(d,s)
typedef __builtin_va_list va_list;

Halp?

[zhiayang]

Great, thanks for that. But what about the other issue? I get an invalid opcode exception if I "kprintf(%c)"...



EDIT:::::
Did some tedious research, turns out that a 'char' is promoted to an int with va_arg. So there.

[zhiayang]

That you could figure out with a bit of googling and even a thread on this forum.

Suffice to say that minimum increment of (E)SP is not 1.

tedious research

Tedious my @$$, 2 minutes googling is tedious nowadays?

Pardon me, perhaps 'tedious' was an over-exaggeration...