luciaos/progs.c

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C
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#include "progs.h"
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#include "paging.h"
#include "file.h"
extern char _USERMODE, _USERMODE_END;
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static uintptr_t USERMODE_STACK = (uintptr_t)&_USERMODE_END - 0x100000;
extern uint32_t create_user_child(uint32_t esp, uint32_t eip, uint32_t argc, ...);
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void programLoadTestInner(char *path) {
uint16_t *vga_text = (uint16_t *)0xb8000;
for (int i = 0; i < 80*25; i++)
vga_text[i] = 0x0f00;
uint32_t successcount;
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uint8_t *diskReadBuf = (uint8_t *)&_USERMODE;
{
uint32_t err;
dirent de;
err = path_getinfo(path, &de);
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if (de.size > 0xE00000 || err) {
vga_text += printStr("File too large or error.", vga_text);
return;
}
FILE file;
err = file_open(&file, path, OPENREAD);
if (err) {
vga_text += printStr("Open Error: ", vga_text);
printDword(err, vga_text);
return;
}
err = file_seek(&file, 0);
if (err) {
vga_text += printStr("Seek Error", vga_text);
return;
}
successcount = err = file_read(&file, diskReadBuf, de.size);
if (!err && de.size > 0) {
vga_text += printStr("Read Error", vga_text);
printDword(err, vga_text);
return;
}
}
vga_text += printStr("Successfully loaded program \"", vga_text);
vga_text += printStr((char*)path, vga_text);
vga_text += printStr("\", ", vga_text);
vga_text += printDec(successcount, vga_text);
vga_text += printStr(" Bytes.", vga_text);
vga_text = nextLine(vga_text,(uint16_t*)0xb8000);
vga_text += printStr("Press any key to run.", vga_text);
kbd_wait();
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uint32_t res = create_user_child(USERMODE_STACK, (uintptr_t)&_USERMODE, 0);
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union V86Regs_t regs;
regs.w.ax = 3; // text mode
V8086Int(0x10, &regs);
vga_text = (uint16_t *)0xb8000;
for (int i = 0; i < 80*25; i++)
vga_text[i] = 0x0f00;
vga_text += printStr("Program returned code: ", vga_text);
vga_text += printDec(res, vga_text);
vga_text += printStr(" (0x", vga_text);
vga_text += printDword(res, vga_text);
vga_text += printStr("). Press any key to exit.", vga_text);
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}
void ProgramLoadTest(char *path) {
// Get free memory (8MB)
uintptr_t process_page0 = add_pages(4|2|1);
uintptr_t process_page1 = add_pages(4|2|1);
// Map usermode memory
move_pages(process_page0 >> 22, (uintptr_t)&_USERMODE >> 22);
move_pages(process_page1 >> 22, ((uintptr_t)&_USERMODE >> 22) + 1);
// Inner program
programLoadTestInner(path);
kbd_wait();
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// Free process memory
free_pages(process_page0 >> 22);
free_pages(process_page1 >> 22);
}