Build a userland version of the kernel for tests

include/unistd.h

@@ -11,6 +11,13 @@
 # include <stdint.h>
 
 
+/* constants */
+/* file streams */
+# define STDIN_FILENO	0
+# define STDOUT_FILENO	1
+# define STDERR_FILENO	2
+
+
 /* prototypes */
 void _exit(int status);
 

project.conf

@@ -1,5 +1,5 @@
 package=uKernel
 version=0.0.0
 
-subdirs=include,src,tests
+subdirs=include,src,tools,tests
 dist=COPYING,Makefile,README.md

tools/arch/i386/start.S

@@ -0,0 +1,87 @@
+/* $Id$ */
+/* Copyright (c) 2018 Pierre Pronchery <khorben@defora.org> */
+/* This file is part of DeforaOS uKernel */
+
+
+.section .text
+/* exit */
+.global _exit
+.type _exit, @function
+_exit:
+	mov	$0x1, %eax
+	int	$0x80
+	ret
+
+
+/* start */
+_start:
+	/* reset the stack */
+	xor	%ebp, %ebp
+
+	/* setup the environment */
+	mov	(%esp), %eax	/* argc */
+	mov	%esp, %ebx	/* argv */
+	add	$0x4, %ebx
+	mov	%eax, %ecx	/* envp */
+	shl	$2, %ecx
+	add	%ebx, %ecx
+#if defined(__ELF__)
+	mov	%ecx, %edx	/* auxv */
+auxv:
+	cmpl	$0x0, (%edx)
+	jz	auxv_done
+	add	$0x4, %edx
+	jmp	auxv
+auxv_done:
+	add	$0x4, %edx
+#endif
+	push	%ebp
+	push	%esp
+	mov	%esp, %ebp
+	push	%ecx
+	push	%ebx
+	push	%eax
+#if defined(__ELF__)
+	push	%edx
+#endif
+
+#if defined(__SSP__)
+	/* initialize SSP */
+	call	__stack_chk_setup
+#endif
+
+	/* run the userland kernel */
+	call	main
+
+	/* exit the userland kernel */
+	mov	%ebp, %esp
+	push	%eax
+	call	exit
+
+	hlt
+
+
+/* write */
+.global _write
+.type _write, @function
+_write:
+	mov	$0x4, %eax
+	int	$0x80
+	ret
+
+
+#if defined(__NetBSD__)
+/* NetBSD emulation */
+# define __NetBSD_Version__	600000000
+
+.section ".note.netbsd.ident", "a"
+	.p2align 2
+
+	.long	7
+	.long	4
+	.long	1
+	.ascii	"NetBSD\0\0"
+	.long	__NetBSD_Version__
+	.previous
+	.p2align 2
+#endif

tools/console.c

@@ -0,0 +1,47 @@
+/* $Id$ */
+/* Copyright (c) 2018 Pierre Pronchery <khorben@defora.org> */
+/* This file is part of DeforaOS uKernel */
+
+
+
+#include <unistd.h>
+#include <stdint.h>
+#include "drivers/console.h"
+
+
+/* types */
+struct _Console
+{
+	int fd;
+};
+
+
+/* prototypes */
+int _write(int fd, char const * buf, size_t len);
+
+
+/* variables */
+static Console _console;
+
+
+/* functions */
+/* console_init */
+Console * console_init(void)
+{
+	_console.fd = STDOUT_FILENO;
+	return &_console;
+}
+
+
+/* useful */
+/* console_clear */
+void console_clear(Console * console)
+{
+}
+
+
+/* console_print */
+void console_print(Console * console, char const * text, size_t len)
+{
+	_write(console->fd, text, len);
+}

tools/main.c

@@ -0,0 +1 @@
+#include "../src/main.c"

tools/project.conf

@@ -0,0 +1,18 @@
+targets=start.o,uKernel
+cppflags_force=-nostdinc -isystem ../include -I ../src
+cflags_force=-ffreestanding -m32
+cflags=-W -Wall -g -O2 -fstack-protector
+as=$(CC)
+asflags_force=$(CFLAGSF) $(CFLAGS) -c
+ldflags_force=-nostdlib -static -m32
+dist=Makefile
+
+[start.o]
+type=object
+sources=start.S
+
+[uKernel]
+type=binary
+sources=console.c,main.c
+ldflags=$(OBJDIR)start.o $(OBJDIR)../src/lib/libuKernel.a `$(CC) -m32 -print-libgcc-file-name`
+depends=$(OBJDIR)start.o,$(OBJDIR)../src/lib/libuKernel.a

tools/start.S

@@ -0,0 +1,20 @@
+/* $Id$ */
+/* Copyright (c) 2018 Pierre Pronchery <khorben@defora.org> */
+/* This file is part of DeforaOS uKernel */
+
+
+
+.text
+
+
+/* _start */
+.global _start
+.type _start, @function
+
+
+/* check for supported architectures */
+#if defined(__amd64__) || defined(__i386__)
+# include "arch/i386/start.S"
+#else
+# warning Unsupported architecture
+#endif