Added a process execute API.

libmaxsi/Makefile

@@ -44,7 +44,7 @@ c/h/stdio.h
 
 COMMONOBJS=c++.o thread.o io.o memory.o string.o error.o format.o
 SORTIXOBJS:=$(addprefix sortix/,$(COMMONOBJS))
-LIBMAXSIOBJS:=$(COMMONOBJS) sortix-vga.o sortix-keyboard.o sortix-sound.o
+LIBMAXSIOBJS:=$(COMMONOBJS) sortix-vga.o sortix-keyboard.o sortix-sound.o process.o
 HEADERS=\
 error.h \
 io.h \
@@ -53,6 +53,7 @@ platform.h \
 string.h \
 syscall.h \
 thread.h \
+process.h \
 types.h \
 format.h \
 keyboard.h \

libmaxsi/hsrc/process.h

@@ -0,0 +1,37 @@
+/******************************************************************************
+
+	COPYRIGHT(C) JONAS 'SORTIE' TERMANSEN 2011.
+
+	This file is part of LibMaxsi.
+
+	LibMaxsi is free software: you can redistribute it and/or modify it under
+	the terms of the GNU Lesser General Public License as published by the Free
+	Software Foundation, either version 3 of the License, or (at your option)
+	any later version.
+
+	LibMaxsi is distributed in the hope that it will be useful, but WITHOUT ANY
+	WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+	FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
+	more details.
+
+	You should have received a copy of the GNU Lesser General Public License
+	along with LibMaxsi. If not, see <http://www.gnu.org/licenses/>.
+
+	process.h
+	Exposes system calls for process creation and management.
+
+******************************************************************************/
+
+#ifndef LIBMAXSI_PROCESS_H
+#define LIBMAXSI_PROCESS_H
+
+namespace Maxsi
+{
+	namespace Process
+	{
+		int Execute(const char* filepath, int argc, const char** argv);
+	}
+}
+
+#endif
+

libmaxsi/process.cpp

@@ -0,0 +1,41 @@
+/******************************************************************************
+
+	COPYRIGHT(C) JONAS 'SORTIE' TERMANSEN 2011.
+
+	This file is part of LibMaxsi.
+
+	LibMaxsi is free software: you can redistribute it and/or modify it under
+	the terms of the GNU Lesser General Public License as published by the Free
+	Software Foundation, either version 3 of the License, or (at your option)
+	any later version.
+
+	LibMaxsi is distributed in the hope that it will be useful, but WITHOUT ANY
+	WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+	FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
+	more details.
+
+	You should have received a copy of the GNU Lesser General Public License
+	along with LibMaxsi. If not, see <http://www.gnu.org/licenses/>.
+
+	process.cpp
+	Exposes system calls for process creation and management.
+
+******************************************************************************/
+
+#include "platform.h"
+#include "syscall.h"
+#include "process.h"
+
+namespace Maxsi
+{
+	namespace Process
+	{
+		DEFN_SYSCALL3(int, SysExecute, 10, const char*, int, const char**);
+
+		int Execute(const char* filepath, int argc, const char** argv)
+		{
+			return SysExecute(filepath, argc, argv);
+		}
+	}
+}
+

sortix/process.cpp

@@ -26,6 +26,8 @@
 #include <libmaxsi/memory.h>
 #include "process.h"
 #include "memorymanagement.h"
+#include "initrd.h"
+#include "elf.h"
 
 namespace Sortix
 {
@@ -75,4 +77,21 @@ namespace Sortix
 
 		segments = NULL;
 	}
+
+	void SysExecute(CPU::InterruptRegisters* R)
+	{
+		const char* programname = (const char*) R->ebx;
+		size_t programsize = 0;
+		byte* program = InitRD::Open(programname, &programsize);
+		if ( program == NULL ) { R->eax = -1; return; }
+		addr_t entry = ELF::Construct(CurrentProcess(), program, programsize);
+		if ( entry == 0 )
+		{
+			PanicF("Could not create process '%s'", programname);
+		}
+		
+		// This is a hacky way to set up the thread!
+		R->eip = entry;
+		R->useresp = 0x80000000UL;
+	}
 }

sortix/process.h

@@ -75,6 +75,8 @@ namespace Sortix
 	};
 
 	Process* CurrentProcess();
+
+	void SysExecute(CPU::InterruptRegisters* R);
 }
 
 #endif

sortix/syscall.cpp

@@ -34,6 +34,7 @@
 #include "vga.h"
 #include "keyboard.h"
 #include "sound.h"
+#include "process.h"
 
 namespace Sortix
 {
@@ -50,7 +51,7 @@ namespace Sortix
 #endif
 		}
 
-		const size_t NumSyscalls = 10;
+		const size_t NumSyscalls = 11;
 		const Syscall Syscalls[NumSyscalls] =
 		{
 			&Scheduler::SysCreateThread,
@@ -63,6 +64,7 @@ namespace Sortix
 			&VGA::SysDeleteFrame,
 			&Keyboard::SysReceieveKeystroke,
 			&Sound::SysSetFrequency,
+			&SysExecute,
 		};
 
 		void Init()