Fixed many HUGE bugs...

5 files changed, 28 insertions, 24 deletions

diff --git a/src/kernel/fs/elf.c b/src/kernel/fs/elf.c
index f6cdecb..ec4bcc0 100644
--- a/src/kernel/fs/elf.c
+++ b/src/kernel/fs/elf.c
@@ -12,7 +12,7 @@
 #include <system.h>
 #include <tasks/process.h>
 
-int is_elf(struct elf_header *header)
+int elf_verify(struct elf_header *header)
 {
 	if (header->ident[0] == ELF_MAG && header->ident[1] == 'E' && header->ident[2] == 'L' &&
 	    header->ident[3] == 'F' && header->ident[4] == ELF_32 &&
@@ -35,7 +35,7 @@ struct process *elf_load(char *path)
 
 	struct elf_header *header = (struct elf_header *)file;
 
-	if (!is_elf(header)) {
+	if (!elf_verify(header)) {
 		warn("File not valid: %s", path);
 		return NULL;
 	} else {
@@ -49,14 +49,19 @@ struct process *elf_load(char *path)
 	u32 image_high = 0;
 
 	// Parse ELF
+	u32 j = 0;
 	for (u32 i = 0; i < header->shentsize * header->shnum; i += header->shentsize) {
 		struct elf_section_header *sh = (void *)header + (header->shoff + i);
 		if (sh->addr != 0) {
 			log("%x", sh->addr);
-			for (u32 j = 0; j < sh->size; j += PAGE_SIZE) {
+			/* for (u32 j = 0; j < sh->size; j += PAGE_SIZE) { */
+			/* 	paging_frame_alloc(paging_get_page(sh->addr + j, proc->cr3)); */
+			/* 	invlpg(sh->addr + j); */
+			/* } */
+			while (j < sh->size) {
 				paging_frame_alloc(paging_get_page(sh->addr + j, proc->cr3));
 				invlpg(sh->addr + j);
-				j += PAGE_SIZE;
+				j += 0x1000;
 			}
 
 			if (sh->type == 8) // Is .bss
@@ -73,16 +78,17 @@ struct process *elf_load(char *path)
 	}
 
 	// Stack
-	struct page_table_entry *stack_page = paging_get_page(0x400000, proc->cr3);
+	struct page_table_entry *stack_page = paging_get_page(USER_STACK_LOW, proc->cr3);
 	paging_frame_alloc(stack_page);
 	stack_page->writable = 1;
-	invlpg(0x400000);
+	invlpg(USER_STACK_LOW);
 
 	strcpy(proc->name, path);
 	proc->brk = image_high;
+	proc->regs.useresp = USER_STACK_HIGH;
+	proc->regs.ebp = proc->regs.useresp;
+	proc->regs.esp = proc->regs.useresp;
 	proc->regs.eip = header->entry;
-	proc->regs.esp = 0x401000;
-	proc->regs.useresp = 0x401000;
 
 	return proc;
 }
\ No newline at end of file
diff --git a/src/kernel/fs/elf.h b/src/kernel/fs/elf.h
index f9a3562..94a3863 100644
--- a/src/kernel/fs/elf.h
+++ b/src/kernel/fs/elf.h
@@ -28,6 +28,9 @@
 #define PF_W 0x2
 #define PF_R 0x4
 
+#define USER_STACK_LOW 0x00400000
+#define USER_STACK_HIGH 0x00401000
+
 struct elf_priv_data {
 	u32 sig;
 };
diff --git a/src/kernel/gdt/gdt.c b/src/kernel/gdt/gdt.c
index 8014756..f201f19 100644
--- a/src/kernel/gdt/gdt.c
+++ b/src/kernel/gdt/gdt.c
@@ -18,7 +18,7 @@ struct gdt_ptr {
 	void *base;
 } __attribute__((packed));
 
-struct gdt_entry gdt[8];
+struct gdt_entry gdt[6];
 struct gdt_ptr gp;
 
 struct tss_entry_struct {
@@ -95,9 +95,6 @@ void gdt_install()
 	// Write TSS
 	tss_write(5, 0x10, stack_hold);
 
-	gdt_set_gate(6, 0, 0xFFFFF, 0x92, 0x0);
-	gdt_set_gate(7, 0, 0xFFFFF, 0x9A, 0x0);
-
 	// Remove old GDT and install the new changes!
 	gdt_flush();
 	tss_flush();
diff --git a/src/kernel/tasks/process.c b/src/kernel/tasks/process.c
index a4c1c79..ee657c4 100644
--- a/src/kernel/tasks/process.c
+++ b/src/kernel/tasks/process.c
@@ -24,15 +24,14 @@ void scheduler(struct regs *regs)
 	static int locked = 0;
 	spinlock(&locked);
 
-	serial_put('.');
-	if (quantum == 0 || current_proc->state != PROC_RUNNING) {
-		quantum = 42; // For next process
-	} else {
-		quantum--;
-		locked = 0;
-		sti();
-		return;
-	}
+	/* serial_put('.'); */
+	/* if (quantum == 0 || current_proc->state != PROC_RUNNING) { */
+	/* 	quantum = 42; // For next process */
+	/* } else { */
+	/* 	quantum--; */
+	/* 	locked = 0; */
+	/* 	return; */
+	/* } */
 
 	serial_put('+');
 	memcpy(&current_proc->regs, regs, sizeof(struct regs));
@@ -56,6 +55,7 @@ void scheduler(struct regs *regs)
 
 	memcpy(regs, &current_proc->regs, sizeof(struct regs));
 	paging_switch_dir(current_proc->cr3);
+	log("%x", regs->cs);
 	if (regs->cs != 0x1B) {
 		regs->gs = 0x23;
 		regs->fs = 0x23;
@@ -75,7 +75,6 @@ void process_force_switch()
 	//scheduler(regs);
 }
 
-u32 hl_cr3;
 u32 hl_eip;
 u32 hl_esp;
 void process_init(struct process *proc)
@@ -91,7 +90,7 @@ void process_init(struct process *proc)
 
 	hl_eip = proc->regs.eip;
 	hl_esp = proc->regs.esp;
-	//paging_switch_dir(proc->cr3);
+	paging_switch_dir(proc->cr3);
 
 	debug("Jumping to userspace!");
 	extern void userspace_jump();
diff --git a/src/kernel/tasks/userspace.asm b/src/kernel/tasks/userspace.asm
index 6881bdf..eec6cff 100644
--- a/src/kernel/tasks/userspace.asm
+++ b/src/kernel/tasks/userspace.asm
@@ -1,5 +1,4 @@
 global userspace_jump
-extern hl_cr3
 extern hl_esp
 extern hl_eip