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- /*
- * linux/arch/i386/kernel/process.c
- *
- * Copyright (C) 1995 Linus Torvalds
- */
-
- /*
- * This file handles the architecture-dependent parts of process handling..
- */
-
- #include <linux/errno.h>
- #include <linux/sched.h>
- #include <linux/kernel.h>
- #include <linux/mm.h>
- #include <linux/stddef.h>
- #include <linux/unistd.h>
- #include <linux/ptrace.h>
- #include <linux/malloc.h>
- #include <linux/ldt.h>
- #include <linux/user.h>
- #include <linux/a.out.h>
-
- #include <asm/segment.h>
- #include <asm/system.h>
-
- void ret_from_sys_call(void) { __asm__("nop"); }
-
- /*
- * The idle loop on a i386..
- */
- asmlinkage int sys_idle(void)
- {
- if (current->pid != 0)
- return -EPERM;
-
- /* Map out the low memory: it's no longer needed */
- /* Sparc version RSN */
-
- /* endless idle loop with no priority at all */
- current->counter = -100;
- for (;;) {
- schedule();
- }
- }
-
- void hard_reset_now(void)
- {
- halt();
- }
-
- void show_regs(struct pt_regs * regs)
- {
- printk("\nSP: %08lx PC: %08lx NPC: %08lx\n", regs->sp, regs->pc,
- regs->npc);
- }
-
- /*
- * Do necessary setup to start up a newly executed thread.
- */
- void start_thread(struct pt_regs * regs, unsigned long sp, unsigned long fp)
- {
- regs->sp = sp;
- regs->fp = fp;
- }
-
- /*
- * Free current thread data structures etc..
- */
- void exit_thread(void)
- {
- halt();
- }
-
- void flush_thread(void)
- {
- halt();
- }
-
- void copy_thread(int nr, unsigned long clone_flags, unsigned long sp, struct task_struct * p, struct pt_regs * regs)
- {
- struct pt_regs * childregs;
-
- childregs = ((struct pt_regs *) (p->kernel_stack_page + PAGE_SIZE)) - 1;
- p->tss.usp = (unsigned long) childregs;
- *childregs = *regs;
- childregs->sp = sp;
- p->tss.psr = regs->psr; /* for condition codes */
- return;
- }
-
- /*
- * fill in the user structure for a core dump..
- */
- void dump_thread(struct pt_regs * regs, struct user * dump)
- {
- return; /* solaris does this enough */
- }
-
- asmlinkage int sys_fork(struct pt_regs regs)
- {
- return do_fork(COPYVM | SIGCHLD, regs.sp, ®s);
- }
-
- /*
- * sys_execve() executes a new program.
- */
- asmlinkage int sys_execve(struct pt_regs regs)
- {
- halt();
- return 0;
- }
-
-