native_internal.h File Reference

Native CPU internal symbols. More...

Detailed Description

Native CPU internal symbols.

Author

Ludwig Knüpfer ludwi.nosp@m.g.kn.nosp@m.uepfe.nosp@m.r@fu.nosp@m.-berl.nosp@m.in.d.nosp@m.e

carl-tud

Definition in file native_internal.h.

#include "util/ucontext.h"
#include <stdio.h>
#include <stdint.h>
#include <poll.h>
#include <stdbool.h>
#include <netdb.h>
#include <ifaddrs.h>
#include <time.h>
#include <sys/stat.h>
#include <sys/statvfs.h>
#include <sys/uio.h>
#include <dirent.h>
#include "cpu_conf.h"
#include "thread.h"
#include "sched.h"
#include "syscalls.h"

Include dependency graph for native_internal.h:

Go to the source code of this file.

Internal native CPU API
typedef void(*	_native_callback_t) (void)
	Prototype for native's internal callbacks.
void	native_cpu_init (void)
	Initializes native CPU.

Native Signal Handling
void	native_interrupt_init (void)
	Registers signal handlers for the native CPU.
int	native_register_interrupt (int sig, _native_callback_t handler)
	Register interrupt handler handler for interrupt signal.
int	native_unregister_interrupt (int sig)
	Unregister interrupt handler for interrupt signal.
void	_native_sig_leave_tramp (void)
	Switches to ISR context, then enables IRQ and returns to userspace.

System Calls
We wrap system calls and syscall-invoking library calls to ensure no context switches occur during a system call.
static void	_native_pending_syscalls_up (void)
	Increment spending system call counter.
static void	_native_pending_syscalls_down (void)
	Decrements pending system call counter.
void	_native_init_syscalls (void)
	Registers system calls.

Native Context Switching
volatile uintptr_t	_native_user_fptr
	Points to instruction in userspace where RIOT left off and switched to ISR context.
volatile int	_native_in_isr
	A boolean variable indicating whether program execution currently takes place in an ISR context.
char	_isr_stack [THREAD_STACKSIZE_DEFAULT]
	Stack used in ISR context.
ucontext_t *	_native_isr_context
	ISR context.
static void	_native_isr_context_make (void(*func)(void))
	Makes ISR context so that execution continues at func when the context is applied.
static ucontext_t *	_native_user_context (void)
	Retrieves user context.

Native Read/Write Methods
ssize_t	_native_read (int fd, void *buf, size_t count)
	Reads file, populates given buffer.
ssize_t	_native_write (int fd, const void *buf, size_t count)
	Writes given data into file.
ssize_t	_native_writev (int fildes, const struct iovec *iov, int iovcnt)
	Performs a vectored write operation.