Everything seems to work : loading a module that displays a message.

9 files changed, 22 insertions, 18 deletions

diff --git a/src/stem/core/kmain.c b/src/stem/core/kmain.c
index 5b6c06e..d6233db 100644
--- a/src/stem/core/kmain.c
+++ b/src/stem/core/kmain.c
@@ -57,7 +57,7 @@ void kmain(struct multiboot_info_t* mbd, int32_t magic) {
 		}
 	}
 
-	monitor_write("Passing conroll to loaded modules...\n");
+	monitor_write("Passing controll to loaded modules...\n");
 	sti();
 	tasking_switch();
 }
diff --git a/src/stem/core/sys.c b/src/stem/core/sys.c
index 36ed6d0..d31c20e 100644
--- a/src/stem/core/sys.c
+++ b/src/stem/core/sys.c
@@ -22,7 +22,7 @@ uint16_t inw(uint16_t port) {
 }
 
 void panic(char* message, char* file, int line) {
-	monitor_write(">> PANIC: >>");
+	monitor_write("\n>> PANIC: >>");
 	monitor_write(message); monitor_write("<< in file "); monitor_write(file);
 	monitor_write("\nSystem halted T_T");
 	asm volatile("cli; hlt");
diff --git a/src/stem/lib/bitset.c b/src/stem/lib/bitset.c
index c13a24d..a6d334b 100644
--- a/src/stem/lib/bitset.c
+++ b/src/stem/lib/bitset.c
@@ -30,5 +30,6 @@ uint32_t bitset_firstFree(struct bitset* t) {
 			}
 		}
 	}
+	return (uint32_t) - 1;
 }
 
diff --git a/src/stem/lib/stdlib.c b/src/stem/lib/stdlib.c
index f4ebd33..c5245e7 100644
--- a/src/stem/lib/stdlib.c
+++ b/src/stem/lib/stdlib.c
@@ -1,7 +1,7 @@
 #include "stdlib.h"
 
 void *memcpy(void *vd, const void *vs, int count) {
-	uint8_t *dest = vd, *src = vs;
+	uint8_t *dest = (uint8_t*)vd, *src = (uint8_t*)vs;
 	uint32_t f = count % 4, n = count / 4, i;
 	const uint32_t* s = (uint32_t*)src;
 	uint32_t* d = (uint32_t*)dest;
diff --git a/src/stem/mem/mem.c b/src/stem/mem/mem.c
index c96a29d..2f7e1c8 100644
--- a/src/stem/mem/mem.c
+++ b/src/stem/mem/mem.c
@@ -34,7 +34,7 @@ static void get_free_pages() {
 			}
 			freepages[freepagecount].virt = i;
 			freepages[freepagecount].phys = frame_alloc() * 0x1000;
-			page_map(pagedir_getPage(kernel_pagedir, i, 0), i, 0, 0);
+			page_map(pagedir_getPage(kernel_pagedir, i, 0), freepages[freepagecount].phys / 0x1000, 0, 0);
 			freepagecount++;
 		} else {
 			if (mem_placementAddr & 0xFFFFF000) {
diff --git a/src/stem/mem/paging.c b/src/stem/mem/paging.c
index 9b9c989..27ce043 100644
--- a/src/stem/mem/paging.c
+++ b/src/stem/mem/paging.c
@@ -54,7 +54,7 @@ void paging_init(size_t totalRam) {
 void paging_cleanup() {
 	uint32_t i;
 	for (i = 0; i < (mem_placementAddr - 0xE0000000) / 0x100000; i++) {
-		kernel_pagedir->tablesPhysical[i] = 9;
+		kernel_pagedir->tablesPhysical[i] = 0;
 		kernel_pagedir->tables[i] = 0;
 	}
 	monitor_write("Pages cleaned up\n");
@@ -80,7 +80,7 @@ struct page_directory *pagedir_new() {
 		pd->tables[i] = 0; pd->tablesPhysical[i] = 0;
 	}
 
-	for (i = 768; i < 1024; i++) {
+	for (i = 896; i < 1024; i++) {
 		pd->tables[i] = kernel_pagedir->tables[i];
 		pd->tablesPhysical[i] = kernel_pagedir->tablesPhysical[i];
 	}
@@ -93,7 +93,7 @@ void pagedir_delete(struct page_directory *pd) {
 	//Unmap segments
 	while (pd->mappedSegs != 0) seg_unmap(pd->mappedSegs);
 	//Cleanup page tables
-	for (i = 0; i < 768; i++) {
+	for (i = 0; i < 896; i++) {
 		kfree_page(pd->tables[i]);
 	}
 	kfree_page(pd->tablesPhysical);
@@ -107,16 +107,16 @@ uint32_t paging_fault(struct registers *regs) {
 
 	seg = current_pagedir->mappedSegs;
 	while (seg) {
-		if (seg->start >= addr && seg->start + seg->len < addr) break;
+		if (seg->start <= addr && seg->start + seg->len > addr) break;
 		seg = seg->next;
 	}
 
 	if (seg != 0) {
-		if (seg->seg->handle_fault(seg, addr, (regs->err_code & 0x2)) != 0) seg = 0;
+		if (seg->seg->handle_fault(seg, addr, (regs->err_code & 0x2) && (regs->eip < 0xE0000000)) != 0) seg = 0;
 	}
 
 	if (seg == 0) {
-		monitor_write("PageFault ");
+		monitor_write("(paging.c:119) Unhandled Page Fault ");
 		if (regs->err_code & 0x1) monitor_write("present ");
 		if (regs->err_code & 0x2) monitor_write("write ");
 		if (regs->err_code & 0x4) monitor_write("user ");
@@ -136,7 +136,7 @@ struct page *pagedir_getPage(struct page_directory *pd, uint32_t address, int ma
 		return &pd->tables[table_idx]->pages[address %  1024];
 	} else if (make) {
 		pd->tables[table_idx] = kmalloc_page(pd->tablesPhysical + table_idx);
-		if (table_idx >= 768)
+		if (table_idx >= 896)
 			tasking_updateKernelPagetable(table_idx, pd->tables[table_idx], pd->tablesPhysical[table_idx]);
 		memset((uint8_t*)pd->tables[table_idx], 0, 0x1000);
 		pd->tablesPhysical[table_idx] |= 0x07;
diff --git a/src/stem/mem/seg.c b/src/stem/mem/seg.c
index f340c63..1452d61 100644
--- a/src/stem/mem/seg.c
+++ b/src/stem/mem/seg.c
@@ -8,7 +8,7 @@ struct segment_map *seg_map(struct segment* seg, struct page_directory *pagedir)
 	sm->seg = seg;
 	sm->pagedir = pagedir;
 	sm->next = pagedir->mappedSegs;
-	pagedir->mappedSegs = sm->next;
+	pagedir->mappedSegs = sm;
 	return sm;
 }
 
diff --git a/src/stem/task/syscall.c b/src/stem/task/syscall.c
index 0878b30..5aab011 100644
--- a/src/stem/task/syscall.c
+++ b/src/stem/task/syscall.c
@@ -8,13 +8,14 @@
 
 CALL0(thread_exit, thread_exit_sc);
 CALL0(tasking_switch, schedule_sc);
+CALL1(thread_sleep, thread_sleep_sc);
 CALL1(process_exit, process_exit_sc);
 CALL1(monitor_write, printk_sc);
 
 int_callback syscalls[] = {
 	thread_exit_sc,
 	schedule_sc,
-	0,			//Syscall 2 will be thread_sleep
+	thread_sleep_sc,
 	process_exit_sc,
 	printk_sc,
 	0 };
diff --git a/src/stem/task/task.c b/src/stem/task/task.c
index 0352308..804adc2 100644
--- a/src/stem/task/task.c
+++ b/src/stem/task/task.c
@@ -85,6 +85,7 @@ void tasking_switch() {
 }
 
 void tasking_updateKernelPagetable(uint32_t idx, struct page_table *table, uint32_t tablephysical) {
+	if (idx < 896) return;
 	struct process* it = processes;
 	while (it != 0) {
 		it->pagedir->tables[idx] = table;
@@ -94,16 +95,17 @@ void tasking_updateKernelPagetable(uint32_t idx, struct page_table *table, uint3
 }
 
 uint32_t tasking_handleException(struct registers *regs) {
-	if (threads == 0) return 0;	//No tasking yet
-	monitor_write("\nUnhandled exception : ");
+	if (current_thread == 0) return 0;	//No tasking yet
+	monitor_write("\n(task.c:99) Unhandled exception : ");
 	char *exception_messages[] = {"Division By Zero","Debug","Non Maskable Interrupt","Breakpoint",
     "Into Detected Overflow","Out of Bounds","Invalid Opcode","No Coprocessor", "Double Fault",
     "Coprocessor Segment Overrun","Bad TSS","Segment Not Present","Stack Fault","General Protection Fault",
     "Page Fault","Unknown Interrupt","Coprocessor Fault","Alignment Check","Machine Check"};
 	monitor_write(exception_messages[regs->int_no]);
-	monitor_write("\nThread exiting.\n");
+	monitor_write(" at "); monitor_writeHex(regs->eip);
+	monitor_write(" >>> Thread exiting.\n");
 	thread_exit_stackJmp(EX_TH_EXCEPTION);
-	return 0;
+	PANIC("This should never have happened. Please report this.");
 }
 
 void thread_sleep(uint32_t msecs) {
@@ -225,7 +227,7 @@ static void thread_delete(struct thread *th) {
 
 static void process_delete(struct process *pr) {
 	struct thread *it;
-	while (threads->process == pr) thread_delete(threads);
+	while (threads != 0 && threads->process == pr) thread_delete(threads);
 	it = threads;
 	while (it != 0) {
 		while (it->next->process == pr) thread_delete(it->next);