Added process arguments when loaded as modules.

10 files changed, 96 insertions, 31 deletions

diff --git a/doc/syscalls.txt b/doc/syscalls.txt
index 39982c0..833041a 100644
--- a/doc/syscalls.txt
+++ b/doc/syscalls.txt
@@ -21,6 +21,10 @@ id=eax	Name			Parameters				Description
   12	mmap			(see linux specs)		not implemented
   13	munmap			(see linux specs)		not implemented
 
+  14	run				ebx: char* filename		spans a new process and run the executable filename
+  						ecx: char** args
+  15	waitpid			ebx: int pid			wait for a process to exit, returns retval.
+
   20	open			ebx: char* filename		open a file, returns a descriptor
   						ecx: mode
   21	open_relative	ebx: root				open a file, returns a descriptor
diff --git a/menu_cdrom.lst b/menu_cdrom.lst
index 1b99614..4728398 100644
--- a/menu_cdrom.lst
+++ b/menu_cdrom.lst
@@ -2,5 +2,5 @@ timeout	10
 
 title	T/CE
 kernel	/kernel.elf
-module	/test.elf
-module	/initrd
+module	/initrd somewhere
+module	/test.elf arg
diff --git a/src/kernel/config.h b/src/kernel/config.h
index ffb56d2..21035ba 100644
--- a/src/kernel/config.h
+++ b/src/kernel/config.h
@@ -2,8 +2,7 @@
 #define DEF_CONFIG_H
 
 #define K_OS_NAME "T/CE"
-#define K_OS_VER "0.1.0"
-#define K_OS_CODENAME "Mind Your VFS"
-
+#define K_OS_VER "0.1.1"
+#define K_OS_CODENAME "executify"
 
 #endif
diff --git a/src/kernel/core/kmain.cpp b/src/kernel/core/kmain.cpp
index 58a3c48..96c4050 100644
--- a/src/kernel/core/kmain.cpp
+++ b/src/kernel/core/kmain.cpp
@@ -80,7 +80,25 @@ extern "C" void kmain(multiboot_info_t* mbd, int32_t magic) {
 		char* cmd = (char*)mods[i].string;
 		*ke_vt << " * " << cmd << " \t";
 		if (elf_check((uint8_t*)mods[i].mod_start) == 0) {
-			process *pr = elf_exec((uint8_t*)mods[i].mod_start, PL_USER);
+
+			char *args[16] = { cmd, 0 };
+			int a = 1;
+			for (char* c = cmd; c != 0; c++) {
+				if (*c == ' ') {
+					*c = 0;
+					args[a] = c + 1;
+					a++;
+					if (a == 15) {
+						args[a] = 0;
+						break;
+					}
+				} else if (*c == 0) {
+					args[a] = 0;
+					break;
+				}
+			}
+
+			process *pr = elf_exec((uint8_t*)mods[i].mod_start, PL_USER, args);	// todo add args
 			if (pr == 0) {
 				*ke_vt << "Error loading\n";
 			} else {
diff --git a/src/kernel/linker/elf.cpp b/src/kernel/linker/elf.cpp
index 0375e40..8fc2e0c 100644
--- a/src/kernel/linker/elf.cpp
+++ b/src/kernel/linker/elf.cpp
@@ -44,14 +44,14 @@ thread_entry elf_load(uint8_t *data, process* process) {
 	return (thread_entry)ehdr->e_entry;
 }
 
-process* elf_exec(uint8_t *data, int privilege) {
+process* elf_exec(uint8_t *data, int privilege, char** args) {
 	if (elf_check(data)) return 0;
 	
 	process* p = new process(0, 0, privilege);
 
 	thread_entry e = elf_load(data, p);
 
-	new thread(p, e, 0, 0);
+	new thread(p, e, p->set_args(args), 0);
 
 	return p;
 }
diff --git a/src/kernel/linker/elf.h b/src/kernel/linker/elf.h
index 184f410..12216b7 100644
--- a/src/kernel/linker/elf.h
+++ b/src/kernel/linker/elf.h
@@ -58,6 +58,6 @@ struct phdr {
 
 int elf_check(uint8_t *data);	//0 if ok, -1 if not a valid ELF
 thread_entry elf_load(uint8_t *data, process* process);	//Load an ELF to a process, return entry point
-process* elf_exec(uint8_t *data, int privilege);	//Creates a new process and a thread for running ELF file
+process* elf_exec(uint8_t *data, int privilege, char **args);	//Creates a new process and a thread for running ELF file
 
 #endif
diff --git a/src/kernel/task/task.cpp b/src/kernel/task/task.cpp
index e513608..1a5d535 100644
--- a/src/kernel/task/task.cpp
+++ b/src/kernel/task/task.cpp
@@ -340,37 +340,36 @@ static void process_delete(process *pr) {
 	kfree(pr);
 }
 
-size_t process_sbrk(size_t size) {
-	process *p = current_process;
-	if (p->data == 0) return -1;
-	ASSERT(p->data < K_HIGHHALF_ADDR);
-	if (p->data + size >= K_HIGHHALF_ADDR) return -1;
+size_t process::sbrk(size_t size) {
+	if (data == 0) return -1;
+	ASSERT(data < K_HIGHHALF_ADDR);
+	if (data + size >= K_HIGHHALF_ADDR) return -1;
 
 	size_t ret;
-	if (p->dataseg == 0) {
-		size_t start = p->data;
+	if (dataseg == 0) {
+		size_t start = data;
 		if (start & 0x0FFF) start = (start & 0xFFFFF000) + 0x1000;
 		size_t end = start + size;
 		if (end & 0x0FFF) end = (end & 0xFFFFF000) + 0x1000;
 		
 		segment *s = new simpleseg(start, end - start, 1);
 		if (s == 0) return -5;
-		p->dataseg = s->map(p->pagedir, 0);
-		if (p->dataseg == 0) return -1;
+		dataseg = s->map(pagedir, 0);
+		if (dataseg == 0) return -1;
 
 		ret = start;
-		p->data = start + size;
+		data = start + size;
 	} else {
-		size_t start = p->dataseg->start;
-		size_t end = p->data + size;
+		size_t start = dataseg->start;
+		size_t end = data + size;
 		if (end <= start) return -1;
 
 		if (end & 0x0FFF) end = (end & 0xFFFFF000) + 0x1000;
-		simpleseg *s = (simpleseg*)(p->dataseg->seg);
-		s->resize(p->dataseg, end - start);
+		simpleseg *s = (simpleseg*)(dataseg->seg);
+		s->resize(dataseg, end - start);
 
-		ret = p->data;
-		p->data += size;
+		ret = data;
+		data += size;
 	}
 	/* (DBG) ke_vt->writeStr("(sbrk ");
 	ke_vt->writeHex(size);
@@ -380,8 +379,40 @@ size_t process_sbrk(size_t size) {
 	return ret;
 }
 
+void* process::set_args(char** args) {
+	if (args == 0) return 0;
+
+	cli();		// we're writing to this process's user space
+	page_directory *r = current_pagedir;
+	pagedir_switch(pagedir);
+
+	int len = sizeof(char*), argc = 0;
+	for (char** a = args; *a != 0; a++) {
+		len += strlen(*a) + 1 + sizeof(char*);
+		argc++;
+	}
+
+	void* p = (void*)sbrk(len);
+	char** si = (char**)p;
+	char* s = (char*)p + ((argc + 1) * sizeof(char*));
+	for (int i = 0; i < argc; i++) {
+		si[i] = s;
+		strcpy(s, args[i]);
+		s += strlen(args[i]) + 1;
+	}
+	si[argc] = 0;
+
+	pagedir_switch(r);
+	sti();
+
+	return p;
+}
+
+// syscalls
+size_t process_sbrk(size_t size) {
+	return current_process->sbrk(size);
+}
 void process_brk(size_t ptr) {
 	ASSERT(ptr < K_HIGHHALF_ADDR);
-	process_sbrk(ptr - current_process->data);
+	current_process->sbrk(ptr - current_process->data);
 }
-
diff --git a/src/kernel/task/task.h b/src/kernel/task/task.h
index 1c32657..99738b9 100644
--- a/src/kernel/task/task.h
+++ b/src/kernel/task/task.h
@@ -41,6 +41,9 @@ class process {
 
 	process() : fd(4, 4) {}	// must not be used directly
 	process(process *parent, uint32_t uid, uint32_t privilege);
+
+	void* set_args(char** args);
+	size_t sbrk(size_t size);
 };
 
 class thread {
diff --git a/src/user/lib/start.c b/src/user/lib/start.c
index 3dbb994..2521f97 100644
--- a/src/user/lib/start.c
+++ b/src/user/lib/start.c
@@ -1,8 +1,8 @@
 #include <tce/syscall.h>
 
-extern int main();
+extern int main(char **args);
 
-void start() {
-	int ret = main();
+void start(char **args) {
+	int ret = main(args);
 	process_exit(ret);
 }
diff --git a/src/user/test/main.c b/src/user/test/main.c
index c98a619..81753bd 100644
--- a/src/user/test/main.c
+++ b/src/user/test/main.c
@@ -78,7 +78,17 @@ void fprint(FILE f, char *s) {
 	write(f, 0, strlen(s), s);
 }
 
-int main() {
+int main(char** args) {
+	char**a;
+	if (args != 0) {
+		printk("args");
+		for (a = args; *a != 0; a++) {
+			printk(" - ");
+			printk(*a);
+		}
+		printk("\n");
+	}
+
 	printk("(test app) malloc(42) = ");
 	printk_hex((uint32_t)malloc(42));
 	printk("\n");