x

src/ChangeLog

@@ -10,7 +10,7 @@
 //----------------------------------------------------------------------------//
 
 2018/10/??  - Started talking about making our own OS
-2018/11/??  - Name decided & creation of gnu-os-k.eu
+2018/11/??  - Name decided & creation of os-k.eu
 2018/12/06  - Actually started project, began MBR, decided directories organization, created this file and others
 2018/12/08  - MBR actually supports Long Mode Compatibility Verification
             - Added A20 line Enabling to MBR

src/Makefile

@@ -8,11 +8,11 @@
 #----------------------------------------------------------------------------#
 
 CCNAME="/opt/cross-cc/bin/x86_64-elf-gcc"
-CWARNS=-Wall -Wextra -Werror -pedantic
 CLDSCR=-T kernel.ld
+CWARNS= -pedantic -Wall -Wextra -Werror
 CFLAGS=-nostdlib -ffreestanding -mcmodel=large -mno-red-zone -mno-mmx -mno-sse -mno-sse2
+CDEFINES=-D_KALEID_KERNEL
 CINCLUDES=-I./kaleid
-CDEFINES=
 
 CC=$(CCNAME) $(CWARNS) $(CLDSCR) $(CFLAGS) $(CDEFINES) $(CINCLUDES)
 
@@ -57,23 +57,26 @@ COBJDIR=$(OBJDIR)/$(COMMDIR)
 COMMDEPS=$(COMMDIR)/common.h $(COMMDIR)/assert.h $(COMMDIR)/atomic.h $(COMMDIR)/config.h \
 			$(COMMDIR)/status.h
 
-COBJECTS=$(COBJDIR)/lib/string.o
+COBJECTS=$(COBJDIR)/lib/string.o $(COBJDIR)/lib/status.o
 
-common: common.lib.string.c $(COMMDEPS)
+common: common.lib.string.c common.lib.status.c
 
 common.lib.string.c: $(COMMDIR)/lib/string.c $(COMMDEPS)
-	$(CC) -c $(COMMDIR)/lib/string.c -o $(OBJDIR)/$(COMMDIR)/lib/string.o
+	$(CC) -c $(COMMDIR)/lib/string.c -o $(COBJDIR)/lib/string.o
+
+common.lib.status.c: $(COMMDIR)/lib/status.c $(COMMDEPS)
+	$(CC) -c $(COMMDIR)/lib/status.c -o $(COBJDIR)/lib/status.o
 
 #----------------------------------------------------------------------------#
 # KERNEL MAKEFILE
 
 KOBJDIR=$(OBJDIR)/$(KERNDIR)
 
-KERNDEPS=$(COMMDEPS) $(KERNDIR)/init.h $(KERNDIR)/io/terminal.h $(KERNDIR)/io/ports.h
+KERNDEPS=$(COMMDEPS) $(KERNDIR)/init.h $(KERNDIR)/io/terminal.h $(KERNDIR)/io/ports.h $(KERNDIR)/ke/panic.h
 
-kernel: common kernel.io.terminal.c kernel.init.c kernel.io.ports.c
+kernel: common kernel.io.terminal.c kernel.init.c kernel.io.ports.c kernel.ke.panic.c
 	$(CC) -o $(BINDIR)/kaleid-kernel.elf \
-			$(COBJECTS) $(KOBJDIR)/init.o \
+			$(COBJECTS) $(KOBJDIR)/init.o $(KOBJDIR)/ke/panic.o \
 			$(KOBJDIR)/io/terminal.o $(KOBJDIR)/io/ports.o
 
 
@@ -85,44 +88,9 @@ kernel.io.ports.c: $(KERNDIR)/io/ports.c $(KERNDEPS)
 
 kernel.io.terminal.c: $(KERNDIR)/io/terminal.c $(KERNDEPS)
 	$(CC) -c $(KERNDIR)/io/terminal.c -o $(KOBJDIR)/io/terminal.o
-	
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+kernel.ke.panic.c: $(KERNDIR)/ke/panic.c $(KERNDEPS)
+	$(CC) -c $(KERNDIR)/ke/panic.c -o $(KOBJDIR)/ke/panic.o
 
+#----------------------------------------------------------------------------#
 

src/boot/loader64.inc

@@ -5,7 +5,7 @@
 ;            NeoX                                                              ;
 ;                                                                              ;
 ;   Desc:   Kernel (second stage) Loader for OS/K INCLUDED FUNCTIONS           ;
-;                   (x86_64 architecture only)                                 ;
+;                  (x86_64 architecture only)                                 ;
 ;=----------------------------------------------------------------------------=;
 
 [BITS 64]
@@ -34,7 +34,7 @@ write:
 ; bl  : color code                                                      ;
 ; esi : string address                                                  ;
 ;-----------------------------------------------------------------------;
-    mov  edi, [NextTRAM]                     ;TRAM ADDRESS
+    mov  edi, [NextTRAM]                     ; TRAM ADDRESS
     push rsi
     push rdi
 .pLoop:
@@ -49,7 +49,7 @@ write:
     mov al, bl
     stosb                                   ; color subpixel
     add qword [NextTRAM], 0x2               ; Cursor moving
-    add qword  [VGA_X], 0x2                 ; coord + 2 because 2 subpixels
+    add qword [VGA_X], 0x2                  ; coord + 2 because 2 subpixels
     jmp .pLoop
 .pEnd:    
     pop rdi
@@ -73,3 +73,4 @@ write:
 .scroll:
     ; XXX ;
     jmp .pLoop
+

src/kaleid/common/assert.h

@@ -10,17 +10,19 @@
 #ifndef _KALCOMM_ASSERT_H
 #define _KALCOMM_ASSERT_H
 
-extern const char *panicstr;
-extern void panic(const char *) __dead;
+#if !defined(_NO_DEBUG) && !defined(NDEBUG)
 
-#if !defined(_NO_DEBUG)
+// uses panic() in kernel, abort() in system
+noreturn void ___assert_handler(const char *, const char *, int, const char *);
 
-#define assert(x) do{if(!(x))panic(#x);}while(0);
+#define assert(x) do{if(!(x))___assert_handler(#x, __FILE__, __LINE__, __func__);}while(0);
 
+/*
 #define assert_never_used(x) do{static bool __##x##_init = FALSE; \
         assert(__##x##_init == FALSE); __##x##_init = TRUE;}while(0);
 
 #define assert_used_once(x) do{static bool __##x##_init; assert(__##x##_init == TRUE);} while(0);
+*/
 
 #else // not debugging
 
@@ -28,9 +30,13 @@ extern void panic(const char *) __dead;
 #define NDEBUG 1
 #endif
 
+#if !defined(_NO_DEBUG)
+#define _NO_DEBUG 1
+#endif
+
 #define assert(x)
-#define assert_never_used(x)
 #define assert_used_once(x)
+#define assert_never_used(x)
 
 #endif
 

src/kaleid/common/atomic.h

@@ -12,9 +12,14 @@
 
 // atomic_t defined in common/types.h
 
+#ifdef _KALEID_KERNEL
+
+// only available in the kernel
 #define cli() asm volatile ("cli")
 #define sti() asm volatile ("sti")
 #define hlt() asm volatile ("hlt")
 
 #endif
 
+#endif
+

src/kaleid/common/common.h

@@ -22,7 +22,7 @@
 #define NULL ((void*)0)
 
 #define PACKED __attribute__((packed))
-#define __dead __attribute__((noreturn))
+#define noreturn __attribute__((noreturn))
 
 #define THROWS(...)
 #define ERRS(...)

src/kaleid/common/config.h

@@ -20,11 +20,22 @@
 //		General configuration choices		//
 //------------------------------------------//
 
-// Enable multiprocessor support?
-// Right now this has to be left to NO
+//
+//  Enable/disable multiprocessor support
+//
 #define MULTIPROCESSOR NO
 
-// etc...
+//
+//  Enable/disable preemptivity
+//
+#define PREEMPTIVE YES
+
+//
+//  Size of a tabulation in spaces
+//  Default: 4 spaces/tab
+//
+#define TABSIZE 4
+
 // this file is to be progressively filled
 
 #endif

src/kaleid/common/config.h.in

@@ -20,11 +20,22 @@
 //		General configuration choices		//
 //------------------------------------------//
 
-// Enable multiprocessor support?
-// Right now this has to be left to NO
+//
+//  Enable/disable multiprocessor support
+//
 #define MULTIPROCESSOR NO
 
-// etc...
+//
+//  Enable/disable preemptivity
+//
+#define PREEMPTIVE YES
+
+//
+//  Size of a tabulation in spaces
+//  Default: 4 spaces/tab
+//
+#define TABSIZE 4
+
 // this file is to be progressively filled
 
 #endif

src/kaleid/common/lib/status.c

@@ -0,0 +1,31 @@
+//----------------------------------------------------------------------------//
+//                           GNU GPL OS/K                                     //
+//                                                                            //
+//  Authors:    spectral`                                                     //
+//              NeoX                                                          //
+//                                                                            //
+//  Desc:       Implementation of describe_status()                           //
+//----------------------------------------------------------------------------//
+
+#include "common/common.h"
+
+static const char *descriptions[] = {
+    [-SUCCESS]              = "Success",
+    [-FAILED]               = "Failed (no precision)",
+    [-NOT_PERMITTED]        = "Operation not permitted",
+    [-ACCESS_DENIED]        = "Access denied",
+    
+    [-BAD_ARGUMENT]         = "Bad argument",
+    [-BAD_ARG_RANGE]        = "Bad argument (not in range)",
+    [-BAD_ARG_NULL]         = "Bad argument (null pointer)",
+};
+
+const char *describe_status(status_t status)
+{
+    (void)descriptions;
+    (void)status;
+
+    // XXX
+    return "";
+}
+

src/kaleid/common/lib/string.c

@@ -4,21 +4,38 @@
 //  Authors:    spectral`                                                     //
 //              NeoX                                                          //
 //                                                                            //
-//  Desc:       strlen() function                                             //
+//  Desc:       String-related functions                                      //
 //----------------------------------------------------------------------------//
 
 #include "common/string.h"
 
-//
-//  Return str's length
 //  TODO multibyte, assembly
-//
+
 size_t strlen(const char *str)
+{
+    const char *base = str;
+
+    while (str) str++;
+
+    return (str - base);
+}
+
+char *strcpy(char *dest, const char *src)
+{
+    char *base = dest;
+    while ((*dest++ = *src++));
+    return base; 
+}
+
+char *strncpy(char *dest, const char *src, size_t n)
 {
     size_t i;
 
-    for (i = 0; str; str++, i++);
+    for (i = 0; i < n && src[i]; i++) {
+        dest[i] = src[i];
+    }
 
-    return i;
+    while (i < n) dest[i++] = 0;
+    return dest;
 }
 

src/kaleid/common/status.h

@@ -14,6 +14,9 @@
 #define STATUS_FAILED(x)  ((x) < 0))
 #define STATUS_SUCCESS(x) (!STATUS_FAILED(x))
 
+// see in common/lib/status.c for status messages
+const char *describe_status(status_t);
+
 #define SUCCESS            (0)          // everything went fine
 
 #define FAILED             (-1)

src/kaleid/common/string.h

@@ -13,7 +13,9 @@
 
 #include "common/common.h"
 
-size_t strlen(const char *s);
+size_t strlen(const char *);
+char *strcpy(char *, const char *);
+char *strncpy(char *, const char *, size_t);
 
 #endif
 

src/kaleid/common/types.h

@@ -22,9 +22,10 @@ typedef short           port_t;
 typedef uint            wchar_t;
 typedef ulong           size_t;
 typedef long            ssize_t;
+typedef size_t          off_t;
 
-typedef int atomic_t;
-typedef ulong pid_t;
+typedef int             atomic_t;
+typedef ulong           pid_t;
 
 #endif
 

src/kaleid/kernel/init.h

@@ -12,6 +12,7 @@
 
 #include "common/common.h"
 #include "common/string.h"
+#include "kernel/ke/panic.h"
 
 // kernel entry point
 void kstart(void);

src/kaleid/kernel/io/ports.h

@@ -14,8 +14,8 @@
 
 #define outb(port,val) asm volatile ("outb %1, %0" : : "dN" (port), "a" (value))
 
-uchar  inb(port_t port); 
-ushort inw(port_t port);
+uchar  inb(port_t); 
+ushort inw(port_t);
 
 #endif
 

src/kaleid/kernel/io/terminal.c

@@ -125,7 +125,7 @@ void kterm_putch_unlocked(struct kterm *kt, char ch)
     else if (ch == '\t') {
         prev_row = kt->kt_curr_y;
         // compiler will optimize this away
-        for (i = 0; i < 4; i++) {
+        for (i = 0; i < TABSIZE; i++) {
             // tabulations can't spread over two lines
             if (kt->kt_curr_y == prev_row) {
                 kterm_putch_unlocked(kt, ' ');
@@ -176,45 +176,11 @@ status_t kterm_print(struct kterm *kt, const char *str)
 
     kterm_lock(kt);
     while (*str) {
-        kterm_putch_unlocked(kt, *str);
-        s++;
+        kterm_putch_unlocked(kt, *str++);
     }
     kterm_unlock(kt);
     
     return SUCCESS;
 }
 
-//
-//  Panic message
-//
-const char *panicstr = NULL;
-
-//
-//  Your best boy panic()
-//
-void panic(const char *s)
-{
-    cli();
-
-    ktclear();
-    
-    if (s == NULL) {
-        s = "(no message given)";
-    }
-    
-    if (panicstr) {
-        // shouldn't be possible
-        ktprint("double panic!\n");
-        hlt();
-    }
-
-    panicstr = s;
-
-    ktprint("panic! - ");
-    ktprint(s);
-
-    while (TRUE) {
-        hlt();
-    }
-}
 

src/kaleid/kernel/io/terminal.h

@@ -25,17 +25,15 @@ enum kterm_color {
 };
 
 struct kterm {
-    // flags?
-
-    void *kt_lock;
-    ushort *kt_buffer;
-
-    uchar kt_color;
-    size_t kt_width,  kt_height;
-    size_t kt_curr_x, kt_curr_y;
-
+    void    *kt_lock;
+    ushort  *kt_buffer;
+    uchar    kt_color;
+    size_t   kt_width;
+    size_t   kt_height;
+    off_t    kt_curr_x;
+    off_t    kt_curr_y;
 #ifndef _NO_DEBUG
-    bool kt_init;
+    bool     kt_init;
 #endif
     
 };
@@ -50,13 +48,13 @@ status_t kterm_print(struct kterm *, const char *);
 status_t kterm_change_color(struct kterm *, uchar);
 
 #ifdef _UNLOCKED_IO
-void kterm_putch_unlocked(struct kterm *, char ch);
+void kterm_putch_unlocked(struct kterm *, char);
 #endif
 
 #define ktclear() kterm_clear(kt_stdout)
-#define ktputch(c) kterm_putch(kt_stdout,c)
-#define ktprint(s) kterm_print(kt_stdout,s)
-#define ktchcol(c) kterm_change_color(kt_stdout, c)
+#define ktputch(c) kterm_putch(kt_stdout, (c))
+#define ktprint(s) kterm_print(kt_stdout, (s))
+#define ktchcol(c) kterm_change_color(kt_stdout, (c))
 
 #define kterm_lock(kt)
 #define kterm_trylock(kt)

src/kaleid/kernel/ke/panic.c

@@ -0,0 +1,59 @@
+//----------------------------------------------------------------------------//
+//                           GNU GPL OS/K                                     //
+//                                                                            //
+//  Authors:    spectral`                                                     //
+//              NeoX                                                          //
+//                                                                            //
+//  Desc:       How NOT to panic 101                                          //
+//----------------------------------------------------------------------------//
+
+#include "kernel/ke/panic.h"
+
+//
+//  Panic message
+//
+const char *panicstr = NULL;
+
+//
+//  Failed assert() handler
+//
+noreturn void ___assert_handler(const char *msg, const char *file, int line, const char *func)
+{
+    // not getting out of here
+    cli();
+    
+    (void)file; (void)line; (void)func;
+    
+    // XXX sprintf() to create a proper panicstr
+    panic(msg);
+}
+
+//
+//  Your best boy panic()
+//
+void panic(const char *str)
+{
+    cli();
+
+    ktclear();
+    
+    if (str == NULL) {
+        str = "(no message given)";
+    }
+    
+    if (panicstr) {
+        // shouldn't be possible
+        ktprint("double panic!\n");
+        hlt();
+    }
+
+    panicstr = str;
+
+    ktprint("panic! - ");
+    ktprint(str);
+
+    while (TRUE) {
+        hlt();
+    }
+}
+

src/kaleid/kernel/ke/panic.h

@@ -0,0 +1,18 @@
+//----------------------------------------------------------------------------//
+//                           GNU GPL OS/K                                     //
+//                                                                            //
+//  Authors:    spectral`                                                     //
+//              NeoX                                                          //
+//                                                                            //
+//  Desc:       Looking to create some panic? Look no further!                //
+//----------------------------------------------------------------------------//
+
+#ifndef _KALKERN_KE_PANIC_H
+#define _KALKERN_KE_PANIC_H
+
+#include "kernel/io/terminal.h"
+
+extern const char *panicstr;
+noreturn void panic(const char *);
+
+#endif