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Control System 的代码
system.h
#define move_to_user_mode() \
__asm__ ("movl %%esp,%%eax\n\t" \
"pushl $0x17\n\t" \
"pushl %%eax\n\t" \
"pushfl\n\t" \
"pushl $0x0f\n\t" \
"pushl $1f\n\t" \
"iret\n" \
"1:\tmovl $0x17,%%eax\n\t
system.h
//System.h
//bits
#define BIT0 0x00000001
#define BIT1 0x00000002
#define BIT2 0x00000004
#define BIT3 0x00000008
#define BIT4 0x00000010
#define
system.lst
1 .code 16
2 .file "system.c"
10 .Ltext0:
11 .global p_pSys
12 .data
13 .align 2
16
system.c
//#include "system.h"
#include "include/include.h"
AT91PS_PMC pPMC = AT91C_BASE_PMC;
void Delay_s (unsigned long a) { while (--a!=0); }
//MAIN POINTER
AT91PS_PIO p_pPioA = AT91C_BAS
system.c
#include
#include
#include
int
system(const char *cmdstring) /* version without signal handling */
{
pid_t pid;
int status;
if (cmdstring == NULL)
return(1);
system.c
#include
#include
#include
#include
int
system(const char *cmdstring) /* with appropriate signal handling */
{
pid_t pid;
int status;
struct sig