fork.c File Reference

x86: the child's thread, for fork(). More...

#include <core/system.h>
#include <core/string.h>
#include <core/arch.h>
#include <sys/proc.h>
#include <sys/sched.h>
#include <aquila/errno.h>

Go to the source code of this file.

Functions
int	arch_proc_fork (struct thread *thread, struct proc *fork)
	Sets up the CPU state of a fork() child's thread: a copy of the parent's kernel stack, registers and FPU state, so that the child returns from fork() as its parent does.

Detailed Description

x86: the child's thread, for fork().

Definition in file fork.c.

Function Documentation

arch_proc_fork()

int arch_proc_fork	(	struct thread *	thread,
		struct proc *	fork )

Sets up the CPU state of a fork() child's thread: a copy of the parent's kernel stack, registers and FPU state, so that the child returns from fork() as its parent does.

Parameters

thread	the thread that called fork()
fork	the child process, whose one thread gets the state

Returns

0, or -ENOMEM if there was no memory for it

Definition at line 21 of file fork.c.

References thread::arch, arch_proc_fork(), x86_regs::err, x86_thread::fpu_context, x86_thread::fpu_enabled, queue::head, KERN_STACK_SIZE, kfree(), kmalloc(), x86_thread::kstack, x86_thread::kstack_base, M_ZERO, memcpy(), NULL, x86_thread::regs, x86_thread::rflags, x86_thread::rip, x86_thread::rsp, proc::threads, qnode::value, and x86_fpu_save_to().