Merge branch 'main' of git.chauvet.pro:starnakin/42_KFS

headers/debug.h

@@ -1,10 +1,18 @@
 #pragma once
 
+#include "kprintf.h"
 #include <stdint.h>
 
+#define PRINT_VAR(var) kprintf("%s: %d\n", #var, var)
+
+struct function_entry {
+	uint32_t addr;
+	char name[64];
+};
+
 struct stackframe {
 	struct stackframe *ebp;
 	uint32_t eip;
 };
 
-void print_stack(void);
+void print_stack(void);

headers/memory.h

@@ -8,6 +8,7 @@
 #define ACCESSED   (1 << 4)
 #define INIT_FLAGS (PRESENT | RW | SUPERVISOR)
 #define PAGE_SIZE  4096
+#define KERN_START 0xC0000000
 
 void init_memory(void);
 void *alloc_frames(size_t size);

headers/signal.h

@@ -0,0 +1,54 @@
+#pragma once
+
+#define SIG_DFL -1
+#define SIG_IGN 0
+
+enum {
+	SIGABRT,   // Abort signal from abort(3)
+	SIGALRM,   // Timer signal from alarm(2)
+	SIGBUS,    // Bus error (bad memory access)
+	SIGCHLD,   // Child stopped or terminated
+	SIGCLD,    // A synonym for SIGCHLD
+	SIGCONT,   // Continue if stopped
+	SIGEMT,    // Emulator trap
+	SIGFPE,    // Floating-point exception
+	SIGHUP,    // Hangup detected on controlling terminal or death of
+	           // controlling process
+	SIGILL,    // Illegal Instruction
+	SIGINFO,   // A synonym for SIGPWR
+	SIGINT,    // Interrupt from keyboard
+	SIGIO,     // I/O now possible (4.2BSD)
+	SIGIOT,    // IOT trap. A synonym for SIGABRT
+	SIGKILL,   // Kill signal
+	SIGLOST,   // File lock lost (unused)
+	SIGPIPE,   // Broken pipe: write to pipe with no readers; see pipe(7)
+	SIGPOLL,   // Pollable event (Sys V); synonym for SIGIO
+	SIGPROF,   // Profiling timer expired
+	SIGPWR,    // Power failure (System V)
+	SIGQUIT,   // Quit from keyboard
+	SIGSEGV,   // Invalid memory reference
+	SIGSTKFLT, // Stack fault on coprocessor (unused)
+	SIGSTOP,   // Stop process
+	SIGTSTP,   // Stop typed at terminal
+	SIGSYS,    // Bad system call (SVr4); see also seccomp(2)
+	SIGTERM,   // Termination signal
+	SIGTRAP,   // Trace/breakpoint trap
+	SIGTTIN,   // Terminal input for background process
+	SIGTTOU,   // Terminal output for background process
+	SIGUNUSED, // Synonymous with SIGSYS
+	SIGURG,    // Urgent condition on socket (4.2BSD)
+	SIGUSR1,   // User-defined signal 1
+	SIGUSR2,   // User-defined signal 2
+	SIGVTALRM, // Virtual alarm clock (4.2BSD)
+	SIGXCPU,   // CPU time limit exceeded (4.2BSD); see setrlimit(2)
+	SIGXFSZ,   // File size limit exceeded (4.2BSD); see setrlimit(2)
+	SIGWINCH,  // Window resize signal (4.3BSD, Sun)
+	SIG_INT,   // Interrupt from keyboard
+};
+
+typedef void (*sighandler_t)(int);
+
+struct signal {
+	int signum;
+	sighandler_t handler;
+};

headers/terminal.h

@@ -1,7 +1,6 @@
 #pragma once
 
 #include "keyboard.h"
-#include "kprintf.h"
 #include <stdbool.h>
 #include <stddef.h>
 #include <stdint.h>
@@ -58,4 +57,4 @@ void terminal_set_default_fg_color(uint8_t fg_color);
 void terminal_set_default_bg_color(uint8_t fg_color);
 void terminal_change_default_fg_color(uint8_t color);
 uint8_t terminal_get_default_color(void);
-uint8_t terminal_get_char(int column, int row);
+uint8_t terminal_get_char(int column, int row);

src/boot.s

@@ -91,7 +91,7 @@ _start:
 
 	# Enable paging and the write-protect bit.
 	movl %cr0, %ecx
-	orl $0x80010000, %ecx
+	orl $0x80000000, %ecx
 	movl %ecx, %cr0
 
 	# Jump to higher half with an absolute jump. 
@@ -119,4 +119,4 @@ _start:
 	# Infinite loop if the system has nothing more to do.
 	cli
 1:	hlt
-	jmp 1b
+	jmp 1b

src/debug/print_stack.c

@@ -1,5 +1,6 @@
 #include "debug.h"
 #include "kprintf.h"
+#include <stddef.h>
 
 void print_stack(void)
 {

src/interrupt/signals/signal.c

@@ -0,0 +1,10 @@
+#include "signal.h"
+#include <stddef.h>
+
+void (*signal(int sig, void (*func)(int)))(int)
+{
+	// TODO after multi tasking and processes
+	(void)sig;
+	(void)func;
+	return NULL;
+}

src/kernel.c

@@ -6,6 +6,7 @@
 #include "memory.h"
 #include "power.h"
 #include "shell.h"
+#include "string.h"
 #include "terminal.h"
 
 #include <stdbool.h>
@@ -28,13 +29,15 @@ void kernel_main(void)
 	terminal_initialize();
 	init_gdt();
 	init_idt();
-	/* init_memory(); */
+	init_memory();
 	load_drivers();
+	memset((void *)0x10001, 'a', 10);
 	kprintf(KERN_ALERT
 	        "I see no way to confuse an array of 256 seg:off pairs with a "
 	        "complex 8*unknown quantity -byte descriptor table. -- Troy "
 	        "Martin 03:50, 22 March 2009 (UTC)\n");
-	while (!kmalloc(10))
-		;
+	/* vmalloc(10); */
+	/* while (!vmalloc(10)) */
+	/* 	; */
 	shell_init();
 }

src/kpanic.c

@@ -8,15 +8,18 @@ void kpanic(const char *format, ...)
 {
 	va_list va;
 
-	terminal_set_bg_color(VGA_COLOR_BLUE);
-	terminal_clear();
+	/* terminal_set_bg_color(VGA_COLOR_BLUE); */
+	/* terminal_clear(); */
 	va_start(va, format);
 	kvprintf(format, va);
 	va_end(va);
-	kprintf("\n\n");
-	print_stack();
-	kprintf("\n\n");
-	kprintf("PRESS SPACE TO REBOOT");
+	uint32_t faulting_address;
+	__asm__ __volatile__("mov %%cr2, %0" : "=r"(faulting_address));
+	kprintf("fault at address: %p\n", faulting_address);
+	/* kprintf("\n\n"); */
+	/* print_stack(); */
+	/* kprintf("\n\n"); */
+	/* kprintf("PRESS SPACE TO REBOOT"); */
 	while (terminal_getkey().scan_code != KEY_SPACE)
 		;
 	reboot();

src/memory/memory.c

@@ -4,42 +4,16 @@
 
 #include <stdint.h>
 
-extern void enable_paging(void);
-extern void load_page_directory(uint32_t *);
-
-extern uint32_t boot_page_table1;
 extern uint32_t boot_page_directory;
-
-// Pour récupérer une entrée spécifique
 uint32_t *page_directory = &boot_page_directory;
-uint32_t page_table_entries[1024];
-
-unsigned long read_cr3()
-{
-	unsigned long cr3_value;
-
-	// Inline assembly to read CR3
-	__asm__ volatile(
-	    "mov %%cr3, %0" // Move the value of CR3 into cr3_value
-	    : "=r"(
-		cr3_value) // Output operand: cr3_value will receive the value
-	    :              // No input operands
-	    :              // No clobber list
-	);
-
-	return cr3_value;
-}
-
-static inline void load_cr3(uint64_t cr3_value)
-{
-	asm volatile("mov %0, %%cr3" ::"r"(cr3_value) : "memory");
-}
+uint32_t page_table1[1024] __attribute__((aligned(4096)));
+uint32_t page_table_entries[1024] __attribute__((aligned(4096)));
 
 void init_memory(void)
 {
-		
-	for (int i = 0; i < 1024; i++)
-		page_table_entries[i] = (i << 12) | INIT_FLAGS;
-
-	page_directory[0] = ((uint32_t)page_table_entries << 12) | INIT_FLAGS;
-}
+	for (int16_t i = 0; i < 0x300; i++)
+		page_directory[i] = 0x02;
+	for (int16_t i = 0; i < 1024; i++)
+		page_table1[i] = i << 12 | 0x03;
+	page_directory[0] = (uint32_t)page_table1 | 0x03;
+}