Import backup from 2006-01-02

apps/Makefile

@@ -1,5 +1,5 @@
 all:
 	make -C hash
-	nasm -f bin test1.asm -o test1.app
+	nasm -f bin -l test1.lst test1.asm -o test1.app
 	nasm -f bin test2.asm -o test2.app
 

apps/test1.asm

@@ -10,8 +10,11 @@ org 0x0
 ;	dd      0	;  reserved
 
 start:
-	mov	eax, 1
+	mov	ebx, astring
-	mov	ebx, 'h'
+	mov	eax, 2
 	int	0x30
 	jmp	start
 	ret
+
+astring:
+	db "Hello there from test1!", 10, 0

apps/test1.lst

@@ -0,0 +1,22 @@
+     1                                  ; test app 1
+     2                                  
+     3                                  [bits 32]
+     4                                  org 0x0
+     5                                  
+     6                                  ;header:	
+     7                                  ;	dd      0x4D534F48      ;  magic identifier "HOSM"
+     8                                  ;	dd      2	;  test app
+     9                                  ;	dd      start	;  start address
+    10                                  ;	dd      0	;  reserved
+    11                                  
+    12                                  start:
+    13 00000000 BB[0F000000]            	mov	ebx, astring
+    14 00000005 B802000000              	mov	eax, 2
+    15 0000000A CD30                    	int	0x30
+    16 0000000C EBF2                    	jmp	start
+    17 0000000E C3                      	ret
+    18                                  
+    19                                  astring:
+    20 0000000F 48656C6C6F20746865-     	db "Hello there from test1!", 10, 0
+    21 00000018 72652066726F6D2074-
+    22 00000021 65737431210A00     

kernel/Makefile

@@ -22,7 +22,8 @@ LDFLAGS=-nodefaultlibs -nostdlib --no-demangle -T link.ld
 OBJS=boot.o lang/lang_a.o \
 	kernel.o mm/mm.o mm/vmm.o lang/conv.o display/kout.o \
 	display/display.o sys/pic.o char/keyboard.o lang/lang.o \
-	sys/pci_classes.o proc/proc.o proc/hash.o \
+	sys/pci_classes.o syscall.o \
+	proc/proc.o proc/hash.o \
 	lang/string.o lang/new.o char/misc_char.o char/vconsole.o \
 	devices.o block/ramdisk.o fs/vfs.o fs/FileSystem.o fs/VFSMount.o \
 	fs/ext2/ext2.o fs/sysfs/sysfs.o fs/sysfs/sysfs_entry.o \
@@ -31,7 +32,7 @@ OBJS=boot.o lang/lang_a.o \
 	fs/ext2/Ext2BlockCache.o
 CSRC=kernel.c mm/mm.c mm/vmm.c lang/conv.c display/kout.c \
 	display/display.c sys/pic.c char/keyboard.c lang/lang.c \
-	sys/pci_classes.c
+	sys/pci_classes.c syscall.c
 CXXSRC=lang/string.cpp lang/new.cpp char/misc_char.cpp char/vconsole.cpp \
 	block/ramdisk.cpp devices.cpp fs/vfs.cpp fs/FileSystem.o fs/VFSMount.o\
 	fs/ext2/ext2.cpp fs/sysfs/sysfs.cpp fs/sysfs/sysfs_entry.cpp \
@@ -95,13 +96,12 @@ block/ramdisk.o: lang/lang.h block/ramdisk.h devices.h
 devices.o: hos_defines.h devices.h char/misc_char.h char/misc_char.h
 devices.o: char/vconsole.h block/ramdisk.h
 fs/vfs.o: hos_defines.h display/kout.h functions.h sys/io.h lang/lang.h
-fs/vfs.o: fs/vfs.h devices.h fs/FileSystem.h fs/OpenDirectory.h fs/OpenFile.h
+fs/vfs.o: fs/vfs.h devices.h fs/FileSystem.h fs/OpenDirectory.h lang/string.h
-fs/vfs.o: lang/string.h fs/VFSMount.h fs/FileSystem.h fs/ext2/ext2.h fs/vfs.h
+fs/vfs.o: fs/OpenFile.h fs/VFSMount.h fs/FileSystem.h fs/ext2/ext2.h fs/vfs.h
 fs/vfs.o: lang/vector.h
 fs/ext2/ext2.o: display/kout.h hos_defines.h mm/vmm.h multiboot.h lang/lang.h
 fs/ext2/ext2.o: fs/ext2/ext2.h fs/vfs.h devices.h fs/ext2/Ext2OpenDirectory.h
-fs/ext2/ext2.o: fs/OpenDirectory.h fs/vfs.h fs/OpenFile.h lang/string.h
+fs/ext2/ext2.o: fs/ext2/Ext2BlockCache.h fs/ext2/Ext2OpenFile.h fs/OpenFile.h
-fs/ext2/ext2.o: fs/ext2/Ext2OpenFile.h fs/OpenFile.h
 fs/sysfs/sysfs.o: display/kout.h hos_defines.h fs/vfs.h devices.h
 fs/sysfs/sysfs.o: fs/sysfs/sysfs.h fs/sysfs/sysfs_entry.h lang/vector.h
 fs/sysfs/sysfs.o: lang/string.h
@@ -115,8 +115,14 @@ proc/hash.o: hos_defines.h proc/hash.h lang/vector.h display/kout.h mm/vmm.h
 proc/hash.o: multiboot.h
 fs/OpenFile.o: fs/OpenFile.h hos_defines.h
 fs/OpenDirectory.o: fs/vfs.h hos_defines.h devices.h fs/OpenDirectory.h
-fs/OpenDirectory.o: fs/OpenFile.h lang/string.h
+fs/OpenDirectory.o: lang/string.h
-fs/ext2/Ext2OpenDirectory.o: display/kout.h hos_defines.h lang/lang.h
+fs/ext2/Ext2OpenDirectory.o: lang/lang.h hos_defines.h fs/vfs.h devices.h
-fs/ext2/Ext2OpenDirectory.o: fs/vfs.h devices.h fs/ext2/Ext2OpenDirectory.h
+fs/ext2/Ext2OpenDirectory.o: fs/ext2/Ext2OpenDirectory.h fs/ext2/ext2.h
-fs/ext2/Ext2OpenDirectory.o: fs/OpenDirectory.h fs/vfs.h fs/OpenFile.h
+fs/ext2/Ext2OpenDirectory.o: fs/ext2/Ext2BlockCache.h fs/ext2/Ext2OpenFile.h
-fs/ext2/Ext2OpenDirectory.o: lang/string.h fs/ext2/ext2.h
+fs/ext2/Ext2OpenDirectory.o: fs/OpenFile.h
+fs/ext2/Ext2OpenFile.o: fs/ext2/Ext2OpenFile.h fs/ext2/ext2.h fs/vfs.h
+fs/ext2/Ext2OpenFile.o: hos_defines.h devices.h fs/OpenFile.h
+fs/ext2/Ext2OpenFile.o: fs/ext2/Ext2BlockCache.h lang/lang.h functions.h
+fs/ext2/Ext2OpenFile.o: sys/io.h
+fs/ext2/Ext2BlockCache.o: fs/vfs.h hos_defines.h devices.h
+fs/ext2/Ext2BlockCache.o: fs/ext2/Ext2BlockCache.h fs/ext2/ext2.h

kernel/Makefile.bak

@@ -22,7 +22,8 @@ LDFLAGS=-nodefaultlibs -nostdlib --no-demangle -T link.ld
 OBJS=boot.o lang/lang_a.o \
 	kernel.o mm/mm.o mm/vmm.o lang/conv.o display/kout.o \
 	display/display.o sys/pic.o char/keyboard.o lang/lang.o \
-	sys/pci_classes.o proc/proc.o proc/hash.o \
+	sys/pci_classes.o syscall.o \
+	proc/proc.o proc/hash.o \
 	lang/string.o lang/new.o char/misc_char.o char/vconsole.o \
 	devices.o block/ramdisk.o fs/vfs.o fs/FileSystem.o fs/VFSMount.o \
 	fs/ext2/ext2.o fs/sysfs/sysfs.o fs/sysfs/sysfs_entry.o \
@@ -31,7 +32,7 @@ OBJS=boot.o lang/lang_a.o \
 	fs/ext2/Ext2BlockCache.o
 CSRC=kernel.c mm/mm.c mm/vmm.c lang/conv.c display/kout.c \
 	display/display.c sys/pic.c char/keyboard.c lang/lang.c \
-	sys/pci_classes.c
+	sys/pci_classes.c syscall.c
 CXXSRC=lang/string.cpp lang/new.cpp char/misc_char.cpp char/vconsole.cpp \
 	block/ramdisk.cpp devices.cpp fs/vfs.cpp fs/FileSystem.o fs/VFSMount.o\
 	fs/ext2/ext2.cpp fs/sysfs/sysfs.cpp fs/sysfs/sysfs_entry.cpp \
@@ -95,15 +96,16 @@ block/ramdisk.o: lang/lang.h block/ramdisk.h devices.h
 devices.o: hos_defines.h devices.h char/misc_char.h char/misc_char.h
 devices.o: char/vconsole.h block/ramdisk.h
 fs/vfs.o: hos_defines.h display/kout.h functions.h sys/io.h lang/lang.h
-fs/vfs.o: fs/vfs.h devices.h lang/string.h lang/vector.h fs/FileSystem.h
+fs/vfs.o: fs/vfs.h devices.h fs/FileSystem.h fs/OpenDirectory.h fs/OpenFile.h
-fs/vfs.o: fs/OpenFile.h fs/OpenDirectory.h fs/VFSMount.h fs/FileSystem.h
+fs/vfs.o: lang/string.h fs/VFSMount.h fs/FileSystem.h fs/ext2/ext2.h fs/vfs.h
-fs/vfs.o: fs/vfs.h fs/ext2/ext2.h
+fs/vfs.o: lang/vector.h
 fs/ext2/ext2.o: display/kout.h hos_defines.h mm/vmm.h multiboot.h lang/lang.h
-fs/ext2/ext2.o: fs/ext2/ext2.h fs/vfs.h devices.h
+fs/ext2/ext2.o: fs/ext2/ext2.h fs/vfs.h devices.h fs/ext2/Ext2OpenDirectory.h
+fs/ext2/ext2.o: fs/OpenDirectory.h fs/vfs.h fs/OpenFile.h lang/string.h
+fs/ext2/ext2.o: fs/ext2/Ext2OpenFile.h fs/OpenFile.h
 fs/sysfs/sysfs.o: display/kout.h hos_defines.h fs/vfs.h devices.h
-fs/sysfs/sysfs.o: fs/sysfs/sysfs.h fs/FileSystem.h fs/OpenFile.h
+fs/sysfs/sysfs.o: fs/sysfs/sysfs.h fs/sysfs/sysfs_entry.h lang/vector.h
-fs/sysfs/sysfs.o: fs/OpenDirectory.h fs/vfs.h lang/string.h lang/vector.h
+fs/sysfs/sysfs.o: lang/string.h
-fs/sysfs/sysfs.o: fs/VFSMount.h fs/FileSystem.h fs/sysfs/sysfs_entry.h
 fs/sysfs/sysfs_entry.o: fs/sysfs/sysfs_entry.h lang/vector.h hos_defines.h
 fs/sysfs/sysfs_entry.o: lang/string.h
 sys/pci.o: hos_defines.h display/kout.h sys/io.h sys/pci.h lang/vector.h
@@ -113,6 +115,9 @@ proc/proc.o: lang/vector.h
 proc/hash.o: hos_defines.h proc/hash.h lang/vector.h display/kout.h mm/vmm.h
 proc/hash.o: multiboot.h
 fs/OpenFile.o: fs/OpenFile.h hos_defines.h
-fs/OpenDirectory.o: fs/OpenDirectory.h fs/vfs.h hos_defines.h devices.h
+fs/OpenDirectory.o: fs/vfs.h hos_defines.h devices.h fs/OpenDirectory.h
-fs/OpenDirectory.o: lang/string.h lang/vector.h fs/FileSystem.h fs/OpenFile.h
+fs/OpenDirectory.o: fs/OpenFile.h lang/string.h
-fs/OpenDirectory.o: fs/VFSMount.h fs/FileSystem.h fs/vfs.h
+fs/ext2/Ext2OpenDirectory.o: display/kout.h hos_defines.h lang/lang.h
+fs/ext2/Ext2OpenDirectory.o: fs/vfs.h devices.h fs/ext2/Ext2OpenDirectory.h
+fs/ext2/Ext2OpenDirectory.o: fs/OpenDirectory.h fs/vfs.h fs/OpenFile.h
+fs/ext2/Ext2OpenDirectory.o: lang/string.h fs/ext2/ext2.h

kernel/idt.inc

@@ -1,7 +1,7 @@
 ;idt.inc
 ;Author: Josh Holtrop
 ;Date: 10/30/03
-;Modified: 07/06/04
+;Modified: 01/02/06
 
 idtr:
 	dw	50*8-1		;size of idt
@@ -67,6 +67,23 @@ isr_label	48
 isr_label	49
 
 isr_main:
+	; ok, here, we need to duplicate the top item on the stack
+	; (the old eax) if the interrupt number is not 8 or 10-14
+	; this is to properly align the stack for both exceptions
+	; having and not having error codes
+	cmp	eax, 8
+	jz	isr_main_nodup		; if int=8, no dup
+	cmp	eax, 10
+	jb	isr_main_dup		; if int<10, dup
+	cmp	eax, 14
+	jbe	isr_main_nodup		; if int<=14, no dup
+isr_main_dup:				; else dup
+	sub	esp, 4
+	push	eax
+	mov	eax, [esp+8]
+	mov	[esp+4], eax
+	pop	eax
+isr_main_nodup:
 	push	ebx
 	push	ecx
 	push	edx
@@ -93,6 +110,7 @@ isr_main:
 	pop	edx
 	pop	ecx
 	pop	ebx
+	add	esp, 4		;bypass error code
 	pop	eax		;original saved eax
 
 	iret

kernel/kernel.c

@@ -24,6 +24,7 @@
 #include "fs/ext2/ext2.h"
 #include "sys/pci.h"
 #include "proc/proc.h"
+#include "syscall.h"
 
 mb_info_t mb_info_block;
 mb_mmap_t mb_mmap[MAX_MMAP];
@@ -38,6 +39,7 @@ u32_t timer;				// number of IRQ 0's
 
 extern u32_t mm_freepages;
 extern u32_t proc_new_esp;
+extern u32_t cur_task;
 
 /* This function runs in segmented memory - 0xC000_0000 is mapped to 0x0 but 0x0
    itself is an invalid linear address. Therefore, the multiboot information addresses
@@ -151,35 +153,6 @@ void k_init()
 		}
 	}
 
-	char *buffer = kmalloc(2000);
-	void *ulab;
-	vfs_stat_t ulabstat;
-
-	vfs_stat("/ulab", &ulabstat);
-	ulab = vfs_open_file("/ulab", VFS_MODE_READ);
-	vfs_read_file_block(ulab, buffer, ulabstat.size);
-	for (i = 0; i < ulabstat.size; i++)
-		putc(buffer[i]);
-	kprintf("\n");
-	vfs_close_file(ulab);
-
-	ulab = vfs_open_file("/ulab", VFS_MODE_WRITE | VFS_MODE_APPEND);
-	vfs_write_file_block(ulab, "String!!!", 9);
-	vfs_write_file(ulab, 'H');
-	vfs_write_file_block(ulab, "String!!!", 9);
-	vfs_write_file(ulab, 'I');
-	vfs_write_file_block(ulab, "String!!!", 9);
-	vfs_write_file(ulab, '!');
-	vfs_write_file_block(ulab, "String!!!", 9);
-	vfs_close_file(ulab);
-
-	vfs_stat("/ulab", &ulabstat);
-	ulab = vfs_open_file("/ulab", VFS_MODE_READ);
-	vfs_read_file_block(ulab, buffer, ulabstat.size);
-	for (i = 0; i < ulabstat.size; i++)
-		putc(buffer[i]);
-	kprintf("\n");
-	vfs_close_file(ulab);
 
 	void *root = vfs_open_dir("///");
 	char name[VFS_MAX_PATH_LENGTH];
@@ -224,7 +197,7 @@ void k_init()
 		kprintf("Error: Could not open directory\n");
 
 	/* Create the initial task */
-/*	vfs_stat_t stat;
+	vfs_stat_t stat;
 	if (!vfs_stat(HOS_INIT_TASK, &stat))
 	{
 		if (stat.permissions &
@@ -237,7 +210,7 @@ void k_init()
 			create_task(buf, stat.size, 0, 0);
 		}
 	}
-*/
+
 	criticalCounter--;
 }
 
@@ -246,6 +219,9 @@ void isr(u32_t num, int_stack_t *int_stack)
 	criticalCounter++;
 	switch (num)
 	{
+	case 0x0:				/* divide by zero */
+		kprintf("divide by zero, current process: %u\n", cur_task);
+		break;
 	case 0x20:				// timer
 		timer++;
 		(*(u16_t *)CONSOLE_MEMORY)++;
@@ -257,9 +233,29 @@ void isr(u32_t num, int_stack_t *int_stack)
 		pic_eoi();
 		break;
 	case 0x30:
-		if (int_stack->eax == 1)
+		syscall(cur_task, int_stack);
-			putc(int_stack->ebx);
 		break;
+	case 0x0D:				/* general protection (error code) */
+		kprintf("General protection fault process %u, error #%u\n", cur_task, int_stack->error);
+		break;
+	case 0x0E:				/* Page fault (error code) */
+		kprintf("Page fault process %u, error #%u\n", cur_task, int_stack->error);
+		break;
+	case 0x01:				/* debug exception */
+	case 0x02:				/* non-maskable interrupt */
+	case 0x03:				/* breakpoint */
+	case 0x04:				/* overflow */
+	case 0x05:				/* bound exception */
+	case 0x06:				/* invalid opcode */
+	case 0x07:				/* FPU not available */
+	case 0x08:				/* Double fault (error code) */
+	case 0x09:				/* coprocessor segment overrun */
+	case 0x0A:				/* invalid TSS (error code) */
+	case 0x0B:				/* segment not present (error code) */
+	case 0x0C:				/* stack exception (error code) */
+	case 0x10:				/* floating point error */
+	case 0x11:				/* alignment check */
+	case 0x12:				/* machine check */
 	default:
 		kprintf("Unhandled interrupt #%d, CR2 = 0x%x, int_stack at 0x%x!\n", num, read_cr2(), int_stack);
 		halt();

kernel/kernel.h

@@ -32,11 +32,12 @@ typedef struct
 	u32_t	ecx;
 	u32_t	ebx;
 	u32_t	eax;
-	u32_t	eip;
 
+	u32_t	error;		/* valid on exceptions 8, 10-14 */
+	u32_t	eip;
 	u32_t	cs;
 	u32_t	eflags;
-	u32_t	esp;		/* present if ring3->ring0 transition ?? */
+	u32_t	esp;		/* present if privilege transition */
 	u32_t	ss;
 } int_stack_t;
 

kernel/proc/proc.cpp

@@ -22,11 +22,11 @@ extern u32_t mm_freepages;
 #include "proc/hash.h"
 
 extern "C" {
-u32_t	cur_task = 0;
+u32_t	cur_task = 0;		/* PID of currently executing process */
-u32_t	n_processes = 0;
+u32_t	n_processes = 0;	/* total number of processes */
 tss_t	tss0;
 u32_t	pid_base = 1024;
-u32_t	pid_index = 0;
+u32_t	pid_index = 0;		/* index of running process in 'pids' vector */
 }
 
 hash	*processes;
@@ -48,6 +48,11 @@ int	proc_init()
 	return 0;
 }
 
+process_t *proc_get_struct(u32_t pid)
+{
+	return (process_t *) processes->get(pid);
+}
+
 void	proc_sched(int_stack_t *int_stack)
 {
 	u32_t new_pid_index = (pid_index + 1) % pids->size();
@@ -146,7 +151,7 @@ void	create_process_stack(process_t *p, void *entry)
 	p->int_stack.fs = SEG_USER_DATA | 0x3;
 	p->int_stack.gs = SEG_USER_DATA | 0x3;
 	p->int_stack.ss = SEG_USER_DATA | 0x3;
-	p->int_stack.esp = 0x20000000;
+	p->int_stack.esp = 0x80000000;			/* esp at 2GB */
 	p->int_stack.eflags = 0x0202;
 	p->int_stack.cs = SEG_USER_CODE | 0x3;
 	p->int_stack.eip = (u32_t)entry;

kernel/proc/proc.h

@@ -68,6 +68,8 @@ typedef struct
 } __attribute__((packed)) tss_t;
 
 int	proc_init();
+process_t *proc_get_struct(u32_t pid);
+
 void	proc_sched(int_stack_t *int_stack);
 u32_t	get_pid();
 void	switch_task(int_stack_t *int_stack, u32_t new_task);

kernel/syscall.c

@@ -0,0 +1,25 @@
+// syscall.c
+// Author: Josh Holtrop
+// Date; 01/02/06
+// Modified: 01/02/06
+
+#include "syscall.h"
+#include "display/kout.h"
+#include "proc/proc.h"
+
+void	syscall(u32_t cur_task, int_stack_t *int_stack)
+{
+	static u32_t times = 0;
+	process_t *proc = proc_get_struct(cur_task);
+	switch (int_stack->eax)
+	{
+	case 1:
+		times++;
+		kprintf("\033[sTimes Called: %d\033[u", times);
+		break;
+	case 2:
+		kprintf("%s", int_stack->ebx);
+		break;
+	}
+}
+

kernel/syscall.h

@@ -0,0 +1,14 @@
+// syscall.h
+// Author: Josh Holtrop
+// Date; 01/02/06
+// Modified: 01/02/06
+
+#ifndef __HOS_SYSCALL_H__
+#define __HOS_SYSCALL_H__ __HOS_SYSCALL_H__
+
+#include "hos_defines.h"
+#include "kernel.h"
+
+void	syscall(u32_t cur_task, int_stack_t *int_stack);
+
+#endif