void i386_init(void)
{
extern char edata[], end[];
/* before doing anything else, complete the ELF loading process;
clear the uninitialized global data (BSS) section of our program;
this ensures that all static/global variables start out zero */
memset(edata, 0, end - edata);
/* initialize the console; can't call cprintf until after we do this */
cons_init();
cprintf("\n*** Welcome to Jake, The Java Kernel! ***");
cprintf("\nCopyright (C) 2011. Enterprise Java Systems.\n\n");
/* test the stack backtrace function */
test_backtrace(5);
/* memory setup */
i386_detect_memory();
i386_vm_init();
/* drop into the kernel monitor */
while (1)
monitor(NULL);
}
void i386_init(void)
{
extern char edata[], end[];
// Before doing anything else, complete the ELF loading process.
// Clear the uninitialized global data (BSS) section of our program.
// This ensures that all static/global variables start out zero.
memset(edata, 0, end - edata);
// Initialize the console.
// Can't call cprintf until after we do this!
cons_init();
cprintf("6828 decimal is %o octal!\n", 6828);
//check page_alloc() this is a test,not my code
check_page_alloc();
// Test the stack backtrace function (lab 1 only)
test_backtrace(5);
// Drop into the kernel monitor.
while (1)
monitor(NULL);
}
void
i386_init(void)
{
extern char edata[], end[];
// Lab1 only
char chnum1 = 0, chnum2 = 0, ntest[256] = {};
// Before doing anything else, complete the ELF loading process.
// Clear the uninitialized global data (BSS) section of our program.
// This ensures that all static/global variables start out zero.
memset(edata, 0, end - edata);
// Initialize the console.
// Can't call cprintf until after we do this!
cons_init();
cprintf("6828 decimal is %o octal!%n\n%n", 6828, &chnum1, &chnum2);
cprintf("pading space in the right to number 22: %-8d.\n", 22);
//cprintf("show me the sign: %+d, %+d\n", 1024, -1024);
cprintf("chnum1: %d chnum2: %d\n", chnum1, chnum2);
cprintf("%n", NULL);
memset(ntest, 0xd, sizeof(ntest) - 1);
cprintf("%s%n", ntest, &chnum1);
cprintf("chnum1: %d\n", chnum1);
cprintf("show me the sign: %+d, %+d\n", 1024, -1024);
// Test the stack backtrace function (lab 1 only)
test_backtrace(5);
// Drop into the kernel monitor.
while (1)
monitor(NULL);
}
int test(int i) {
if (i == 0) {
test_backtrace();
return 0;
} else {
return i + test(i - 1);
}
}
// Test the stack backtrace function (lab 1 only)
void test_backtrace(int x)
{
cprintf("entering test_backtrace %d\n", x);
if (x > 0)
test_backtrace(x-1);
else
mon_backtrace(0, 0, 0);
cprintf("leaving test_backtrace %d\n", x);
}
static void test_backtrace(int x)
{
printf("entering test_backtrace %d\n", x);
if (x > 0)
test_backtrace(x - 1);
else
Monitor::backtrace(0, nullptr);
printf("leaving test_backtrace %d\n", x);
}
// Test the stack backtrace function (lab 1 only)
void
test_backtrace(int x)
{
int i;
cprintf("entering test_backtrace %d\n", x);
if (x > 0) {
test_backtrace(x-1);
} else {
mon_backtrace(0,0,0);
}
cprintf("leaving test_backtrace %d\n", x);
}
void
i386_init(void)
{
extern char edata[], end[];
// Before doing anything else, complete the ELF loading process.
// Clear the uninitialized global data (BSS) section of our program.
// This ensures that all static/global variables start out zero.
memset(edata, 0, end - edata);
// Initialize the console.
// Can't call cprintf until after we do this!
cons_init();
#if defined(LAB1_ONLY)
cprintf("6828 decimal is %o octal!\n", 6828);
/* ----- Exercise 8 of Lab 1 -----*/
int x=1,y=3,z=4;
cprintf("x %d, y %x, z %d\n", x, y, z);
unsigned int i = 0x00646c72;
cprintf("H%x Wo%s\n", 57616, &i);
// Shows He110 World, while the demical 0d57616 = 0xe110
// 'r' = 0x72, 'l' = 0x6c, 'd' = 0x64, '\0' = 0x00 which indicates the end of the string
// If the x86 is big-endian, 57616 -> 4321, 0x00646c72 -> 0x726c6400
// Test the stack backtrace function (lab 1 only)
test_backtrace(5);
#endif
// Lab 2 memory management initialization functions
i386_detect_memory();
i386_vm_init();
// Lab 3 user environment initialization functions
env_init();
idt_init();
// Lab 4 multitasking initialization functions
pic_init();
kclock_init();
time_init();
pci_init();
// Should always have an idle process as first one.
ENV_CREATE(user_idle); // 0
// Start fs
ENV_CREATE(fs_fs); // 1
// Start ns.
ENV_CREATE(net_ns); // 2
// Start init
#if defined(TEST)
// Don't touch -- used by grading script!
ENV_CREATE2(TEST, TESTSIZE);
#else
// Touch all you want.
// ENV_CREATE(user_echosrv);
// ENV_CREATE(user_httpd);
// ENV_CREATE(user_testtime);
#endif // TEST*
// Schedule and run the first user environment!
sched_yield();
}
void lab1()
{
printf(CBLU "6828 decimal is %o octal!\n" CEND, 6828);
test_backtrace(5);
}
