backup/30dayMakeOS
1
0
Fork 1
mirror of https://github.com/yourtion/30dayMakeOS.git synced 2026-02-03 01:53:24 +08:00
Code Issues Packages Projects Releases Wiki Activity

保护应用程序（2）

Browse Source
This commit is contained in:
Yourtion
2016-05-17 12:39:47 +08:00
parent f3f9a6c178
commit 575c4ffce8
3 changed files with 12 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
27_day/bootpack.h
View File

@@ -88,15 +88,16 @@ struct GATE_DESCRIPTOR {
void init_gdtidt(void);
void set_segmdesc(struct SEGMENT_DESCRIPTOR *sd, unsigned int limit, int base, int ar);
void set_gatedesc(struct GATE_DESCRIPTOR *gd, int offset, int selector, int ar);
#define ADR_IDT 0x0026f800
#define LIMIT_IDT 0x000007ff
#define ADR_GDT 0x00270000
#define LIMIT_GDT 0x0000ffff
#define ADR_IDT 0x0026f800
#define LIMIT_IDT 0x000007ff
#define ADR_GDT 0x00270000
#define LIMIT_GDT 0x0000ffff
#define ADR_BOTPAK 0x00280000
#define LIMIT_BOTPAK 0x0007ffff
#define AR_DATA32_RW 0x4092
#define AR_CODE32_ER 0x409a
#define AR_TSS32 0x0089
#define AR_LDT 0x0082
#define AR_TSS32 0x0089
#define AR_INTGATE32 0x008e
/* int.c */
@@ -210,6 +211,7 @@ struct TASK {
int level, priority; /* 优先级 */
struct FIFO32 fifo;
struct TSS32 tss;
struct SEGMENT_DESCRIPTOR ldt[2];
struct CONSOLE *cons;
int ds_base, cons_stack;
};

6
27_day/console.c
View File

@@ -373,12 +373,12 @@ int cmd_app(struct CONSOLE *cons, int *fat, char *cmdline)
dathrb = *((int *) (p + 0x0014));
q = (char *) memman_alloc_4k(memman, segsiz);
task->ds_base = (int) q;
set_segmdesc(gdt + task->sel / 8 + 1000, finfo->size - 1, (int) p, AR_CODE32_ER + 0x60);
set_segmdesc(gdt + task->sel / 8 + 2000, segsiz - 1, (int) q, AR_DATA32_RW + 0x60);
set_segmdesc(task->ldt + 0, finfo->size - 1, (int) p, AR_CODE32_ER + 0x60);
set_segmdesc(task->ldt + 1, segsiz - 1, (int) q, AR_DATA32_RW + 0x60);
for (i = 0; i < datsiz; i++) {
q[esp + i] = p[dathrb + i];
}
start_app(0x1b, task->sel + 1000 * 8, esp, task->sel + 2000 * 8, &(task->tss.esp0));
start_app(0x1b, 0 * 8 + 4, esp, 1 * 8 + 4, &(task->tss.esp0));
shtctl = (struct SHTCTL *) *((int *) 0x0fe4);
for (i = 0; i < MAX_SHEETS; i++) {
sht = &(shtctl->sheets0[i]);

3
27_day/mtask.c
View File

@@ -82,7 +82,9 @@ struct TASK *task_init(struct MEMMAN *memman)
for (i = 0; i < MAX_TASKS; i++) {
taskctl->tasks0[i].flags = 0;
taskctl->tasks0[i].sel = (TASK_GDT0 + i) * 8;
taskctl->tasks0[i].tss.ldtr = (TASK_GDT0 + MAX_TASKS + i) * 8;
set_segmdesc(gdt + TASK_GDT0 + i, 103, (int) &taskctl->tasks0[i].tss, AR_TSS32);
set_segmdesc(gdt + TASK_GDT0 + MAX_TASKS + i, 15, (int) taskctl->tasks0[i].ldt, AR_LDT);
}
for (i = 0; i < MAX_TASKLEVELS; i++) {
taskctl->level[i].running = 0;
@@ -133,7 +135,6 @@ struct TASK *task_alloc(void)
task->tss.ds = 0;
task->tss.fs = 0;
task->tss.gs = 0;
task->tss.ldtr = 0;
task->tss.iomap = 0x40000000;
task->tss.ss0 = 0;
return task;