C++ (Cpp) write_gdtr Exemples

Exemple #1

Fichier : kvm.c Projet : lunacyl/ics2015

/* This is similar with the one in start.S. However the previous one
 * cannot be accessed in user process, because its virtual address is
 * below 0xC0000000, and is not in the user process' address space. */
void
init_segment(void) {
	memset(gdt, 0, sizeof(gdt));
	set_segment(&gdt[SEG_KERNEL_CODE], DPL_KERNEL, SEG_EXECUTABLE | SEG_READABLE);
	set_segment(&gdt[SEG_KERNEL_DATA], DPL_KERNEL, SEG_WRITABLE );

	write_gdtr(gdt, sizeof(gdt));
}

Exemple #2

Fichier : kvm.c Projet : dpingg/os-lab1

void
init_segment(void) {
	memset(gdt, 0, sizeof(gdt));
	set_segment(&gdt[SEG_KERNEL_CODE], DPL_KERNEL, SEG_EXECUTABLE | SEG_READABLE);
	set_segment(&gdt[SEG_KERNEL_DATA], DPL_KERNEL, SEG_WRITABLE );
	set_segment(&gdt[SEG_USER_CODE], DPL_USER, SEG_EXECUTABLE | SEG_READABLE);
	set_segment(&gdt[SEG_USER_DATA], DPL_USER, SEG_WRITABLE );

	write_gdtr(gdt, sizeof(gdt));

	set_tss(&gdt[SEG_TSS]);
	write_tr( SELECTOR_USER(SEG_TSS) );
}