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removed pdclib, strange things were happening..., user shell kinda works now

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slinky55
2026-07-06 22:13:57 -05:00
parent 7d76f0ec73
commit 6d7a23d747
308 changed files with 829 additions and 41231 deletions
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33
kernel/syscall.c
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@@ -4,22 +4,18 @@
#include "memory/mm.h"
#include "process.h"
#include "scheduler.h"
#include "kbd.h"
#include <drivers/vga/vga.h>
#include <lib/print.h>
typedef struct registers {
uint32_t gs, fs, es, ds; // Pushed manually
uint32_t edi, esi, ebp, esp, ebx, edx, ecx, eax; // Pushed by pusha
uint32_t int_no, err_code; // Pushed manually
uint32_t eip, cs, eflags, useresp, ss; // Pushed automatically by CPU
} registers_t;
static int32_t sys_exit(int status) {
asm volatile("cli");
asm volatile("hlt");
process_t* task = current_task();
task->state = STATE_DEAD;
kprintf("Process %d exited with status %d\n", task->pid, status);
exit();
return 0;
}
@@ -35,13 +31,18 @@ static int32_t sys_write(int fd, const void* buf, size_t count) {
}
static int32_t sys_read(int fd, void* buf, size_t count) {
if (fd == 0) { // stdin
if (fd == 0) {
char* cbuf = (char*)buf;
size_t bytes_read = 0;
while (bytes_read < count) {
char c = 'r';
cbuf[bytes_read++] = c;
if (c == '\n') break;
kbd_wait();
if (kbd_ready()) {
char c = kbd_read();
cbuf[bytes_read++] = c;
if (c == '\n') break;
}
}
return bytes_read;
}
@@ -83,6 +84,12 @@ static int32_t sys_brk(uint32_t new_break) {
return current->heap_end;
}
typedef struct registers {
uint32_t gs, fs, es, ds; // Pushed manually
uint32_t edi, esi, ebp, esp, ebx, edx, ecx, eax; // Pushed by pusha
uint32_t int_no, err_code; // Pushed manually
uint32_t eip, cs, eflags, useresp, ss; // Pushed automatically by CPU
} registers_t;
int32_t syscall(registers_t* regs) {
switch(regs->eax) {
case 1: return sys_exit(regs->ebx);