Messages in this thread |  | | Date | Thu, 23 Nov 2000 23:23:33 +0100 | From | Pavel Machek <> | Subject | kernel_thread bogosity |
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Hi!
You see? Kernel_thread does not check is sys_clone() worked! Aha, caller is responsible for that, but init/main.c does not seem too carefull. Maybe kernel_thread should at least print a warning?
Plus, can someone explain me why it does not need to setup %%ecx with either zero or address of stack? Pavel
int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags) { long retval, d0;
__asm__ __volatile__( "movl %%esp,%%esi\n\t" "int $0x80\n\t" /* Linux/i386 system call */ "cmpl %%esp,%%esi\n\t" /* child or parent? */ "je 1f\n\t" /* parent - jump */ /* Load the argument into eax, and push it. That way, it does * not matter whether the called function is compiled with * -mregparm or not. */ "movl %4,%%eax\n\t" "pushl %%eax\n\t" "call *%5\n\t" /* call fn */ "movl %3,%0\n\t" /* exit */ "int $0x80\n" "1:\t" :"=&a" (retval), "=&S" (d0) :"0" (__NR_clone), "i" (__NR_exit), "r" (arg), "r" (fn), "b" (flags | CLONE_VM) : "memory"); return retval; }
-- I'm pavel@ucw.cz. "In my country we have almost anarchy and I don't care." Panos Katsaloulis describing me w.r.t. patents at discuss@linmodems.org - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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