Added basic exec calls for init and started libc

22 files changed, 168 insertions, 38 deletions

diff --git a/src/kernel/fs/elf.c b/src/kernel/fs/elf.c
index 9ca98f0..a4c78ba 100644
--- a/src/kernel/fs/elf.c
+++ b/src/kernel/fs/elf.c
@@ -40,7 +40,7 @@ struct process *elf_load(char *path)
 	}
 
 	struct process *proc = process_make_new();
-	proc->name = "ROOT";
+	proc->name = path;
 	proc->registers.eip = header->entry;
 
 	paging_switch_directory(proc->cr3);
@@ -71,4 +71,4 @@ struct process *elf_load(char *path)
 
 	paging_switch_directory(paging_root_directory);
 	return proc;
-}
\ No newline at end of file
+}
diff --git a/src/kernel/fs/elf.h b/src/kernel/fs/elf.h
index 8c7d38a..0fe435b 100644
--- a/src/kernel/fs/elf.h
+++ b/src/kernel/fs/elf.h
@@ -76,4 +76,4 @@ struct elf_program_header {
 int is_elf(struct elf_header *header);
 struct process *elf_load(char *path);
 
-#endif
\ No newline at end of file
+#endif
diff --git a/src/kernel/fs/ext2.c b/src/kernel/fs/ext2.c
index 5fb0158..4e4f617 100644
--- a/src/kernel/fs/ext2.c
+++ b/src/kernel/fs/ext2.c
@@ -251,4 +251,4 @@ uint8_t *read_file(char *path)
 		warn("File not found");
 		return NULL;
 	}
-}
\ No newline at end of file
+}
diff --git a/src/kernel/fs/ext2.h b/src/kernel/fs/ext2.h
index 88515a3..7fbe493 100644
--- a/src/kernel/fs/ext2.h
+++ b/src/kernel/fs/ext2.h
@@ -139,4 +139,4 @@ uint32_t ext2_look_up_path(char *path);
 
 uint8_t *read_file(char *path);
 
-#endif
\ No newline at end of file
+#endif
diff --git a/src/kernel/kernel.c b/src/kernel/kernel.c
index 90b967f..8056055 100644
--- a/src/kernel/kernel.c
+++ b/src/kernel/kernel.c
@@ -67,14 +67,8 @@ void kernel_main(uint32_t magic, uint32_t multiboot_address, uint32_t esp)
 	printf("Content of /etc/test: %s", read_file("/etc/test"));
 
 	syscalls_install();
-	struct process *proc = elf_load("/bin/init");
-	if (proc) {
-		proc->stdin = NULL;
-		proc->stdout = NULL;
-		proc->stderr = NULL;
-		process_init(proc);
-	}
+	kexec("/bin/init");
 
 	halt_loop();
 	// asm ("div %0" :: "r"(0)); // Exception testing x/0
-}
\ No newline at end of file
+}
diff --git a/src/kernel/syscall/actions/sys_exec.c b/src/kernel/syscall/actions/sys_exec.c
new file mode 100644
index 0000000..dc1e9c6
--- /dev/null
+++ b/src/kernel/syscall/actions/sys_exec.c
@@ -0,0 +1,7 @@
+#include <stdint.h>
+#include <kernel/tasks/process.h>
+
+uint32_t sys_exec(char *path)
+{
+	return uexec(path);
+}
diff --git a/src/kernel/syscall/actions/sys_getch.c b/src/kernel/syscall/actions/sys_getch.c
index f1e4dfb..91ccda7 100644
--- a/src/kernel/syscall/actions/sys_getch.c
+++ b/src/kernel/syscall/actions/sys_getch.c
@@ -1,10 +1,11 @@
 #include <stdint.h>
 #include <kernel/lib/stdio.h>
-#include <kernel/input/input.h>
-#include <kernel/lib/lib.h>
-#include <kernel/lib/string.h>
+#include <kernel/io/io.h>
 
 uint32_t sys_getch()
 {
-	return (uint32_t)getch();
-}
\ No newline at end of file
+	sti();
+	uint32_t key = getch();
+	cli();
+	return key;
+}
diff --git a/src/kernel/syscall/syscall.c b/src/kernel/syscall/syscall.c
index ca12118..d0b2b96 100644
--- a/src/kernel/syscall/syscall.c
+++ b/src/kernel/syscall/syscall.c
@@ -8,14 +8,15 @@
 typedef uint32_t (*syscall_func)(uint32_t, ...);
 
 uint32_t (*syscalls[])() = { [0] = (uint32_t(*)())halt_loop, // DEBUG!
-			     [1] = (uint32_t(*)())sys_putch,
-			     [2] = sys_getch,
-			     [3] = sys_malloc,
-			     [4] = sys_free };
+			     [1] = sys_exec,
+			     [2] = (uint32_t(*)())sys_putch,
+			     [3] = sys_getch,
+			     [4] = sys_malloc,
+			     [5] = sys_free };
 
 void syscall_handler(struct regs *r)
 {
-	sti();
+	cli();
 	log("Received syscall!");
 
 	if (r->eax >= sizeof(syscalls) / sizeof(*syscalls))
@@ -29,9 +30,10 @@ void syscall_handler(struct regs *r)
 	    r->edx, r->esi, r->edi);
 
 	r->eax = location(r->ebx, r->ecx, r->edx, r->esi, r->edi);
+	sti();
 }
 
 void syscalls_install()
 {
 	isr_install_handler(0x80, syscall_handler);
-}
\ No newline at end of file
+}
diff --git a/src/kernel/syscall/syscall.h b/src/kernel/syscall/syscall.h
index b2bdc6d..5c21d58 100644
--- a/src/kernel/syscall/syscall.h
+++ b/src/kernel/syscall/syscall.h
@@ -7,6 +7,8 @@ extern void idt_syscall();
 
 void syscalls_install();
 
+uint32_t sys_exec(char *path);
+
 uint32_t sys_putch(char ch);
 
 uint32_t sys_getch();
@@ -15,4 +17,4 @@ uint32_t sys_malloc(uint32_t count);
 
 uint32_t sys_free(uint32_t ptr);
 
-#endif
\ No newline at end of file
+#endif
diff --git a/src/kernel/tasks/process.c b/src/kernel/tasks/process.c
index 4cb8d8c..a4c525a 100644
--- a/src/kernel/tasks/process.c
+++ b/src/kernel/tasks/process.c
@@ -8,6 +8,7 @@
 #include <kernel/memory/paging.h>
 #include <kernel/memory/alloc.h>
 #include <kernel/timer/timer.h>
+#include <kernel/fs/elf.h>
 
 uint32_t pid = 0;
 struct process *root;
@@ -203,4 +204,35 @@ struct process *process_make_new()
 	proc->pid = pid++;
 
 	return proc;
-}
\ No newline at end of file
+}
+
+uint32_t kexec(char *path)
+{
+	struct process *proc = elf_load(path);
+	if (proc == NULL)
+		return -1;
+
+	// TODO: Add stdin etc support (?)
+	proc->stdin = NULL;
+	proc->stdout = NULL;
+	proc->stderr = NULL;
+	process_init(proc);
+}
+
+uint32_t uexec(char *path)
+{
+	process_suspend(current_proc->pid);
+
+	struct process *proc = elf_load(path);
+	if (proc == NULL)
+		return -1;
+
+	proc->stdin = NULL;
+	proc->stdout = NULL;
+	proc->stderr = NULL;
+
+	proc->parent = current_proc;
+	proc->gid = current_proc->pid;
+	process_spawn(proc);
+	return 0;
+}
diff --git a/src/kernel/tasks/process.h b/src/kernel/tasks/process.h
index 1a5c607..5230ea4 100644
--- a/src/kernel/tasks/process.h
+++ b/src/kernel/tasks/process.h
@@ -54,6 +54,10 @@ void process_init(struct process *proc);
 
 struct process *process_make_new();
 
+uint32_t kexec(char *path);
+
+uint32_t uexec(char *path);
+
 extern struct process *current_proc;
 
 extern uint32_t stack_hold;
@@ -70,4 +74,4 @@ extern uint32_t stack_hold;
 #define WAIT_ERROR (-1)
 #define WAIT_OKAY 0
 
-#endif
\ No newline at end of file
+#endif
diff --git a/src/userspace/libc/math.h b/src/userspace/libc/math.h
new file mode 100644
index 0000000..2683535
--- /dev/null
+++ b/src/userspace/libc/math.h
@@ -0,0 +1,20 @@
+#ifndef MELVIX_MATH_H
+#define MELVIX_MATH_H
+
+// Trigonometric
+
+// Hyperbolic
+
+// Exponential and logarithmic
+
+// Power
+
+// Error and gamma
+
+// Rounding and remainder
+
+// Floating point manipulation
+
+// Minimum, maximum, difference
+
+#endif
diff --git a/src/userspace/libc/stdarg.h b/src/userspace/libc/stdarg.h
new file mode 100644
index 0000000..41583f9
--- /dev/null
+++ b/src/userspace/libc/stdarg.h
@@ -0,0 +1,6 @@
+#ifndef MELVIX_STDARG_H
+#define MELVIX_STDARG_H
+
+// va_{list,start,arg,end,copy}
+
+#endif
diff --git a/src/userspace/libc/stdbool.h b/src/userspace/libc/stdbool.h
new file mode 100644
index 0000000..b445c80
--- /dev/null
+++ b/src/userspace/libc/stdbool.h
@@ -0,0 +1,11 @@
+#ifndef MELVIX_STDBOOL_H
+#define MELVIX_STDBOOL_H
+
+#define true 1
+#define false 0
+
+// For the strange people in the world
+#define TRUE 1
+#define FALSE 0
+
+#endif
diff --git a/src/userspace/libc/stddef.h b/src/userspace/libc/stddef.h
new file mode 100644
index 0000000..531cee3
--- /dev/null
+++ b/src/userspace/libc/stddef.h
@@ -0,0 +1,8 @@
+#ifndef MELVIX_STDDEF_H
+#define MELVIX_STDDEF_H
+
+// size_t
+
+#define NULL ((void *)0)
+
+#endif
diff --git a/src/userspace/libc/stdint.h b/src/userspace/libc/stdint.h
new file mode 100644
index 0000000..be28300
--- /dev/null
+++ b/src/userspace/libc/stdint.h
@@ -0,0 +1,18 @@
+#ifndef MELVIX_STDINT_H
+#define MELVIX_STDINT_H
+
+// TODO: Use shorter fixed length integers as stdint in kernel
+
+typedef signed char s8;
+typedef unsigned char u8;
+
+typedef signed short s16;
+typedef unsigned short u16;
+
+typedef signed int s32;
+typedef unsigned int u32;
+
+typedef signed long s64;
+typedef unsigned long u64;
+
+#endif
diff --git a/src/userspace/libc/stdio.h b/src/userspace/libc/stdio.h
new file mode 100644
index 0000000..03dfd1a
--- /dev/null
+++ b/src/userspace/libc/stdio.h
@@ -0,0 +1,8 @@
+#ifndef MELVIX_STDIO_H
+#define MELVIX_STDIO_H
+
+// File operations
+
+// Character input/output
+
+#endif
diff --git a/src/userspace/libc/stdlib.h b/src/userspace/libc/stdlib.h
new file mode 100644
index 0000000..ab6bff4
--- /dev/null
+++ b/src/userspace/libc/stdlib.h
@@ -0,0 +1,10 @@
+#ifndef MELVIX_STDLIB_H
+#define MELVIX_STDLIB_H
+
+// String conversion
+
+// Exit functions
+
+// Memory management
+
+#endif
diff --git a/src/userspace/libc/syscall.c b/src/userspace/libc/syscall.c
index fd27ef5..42786d4 100644
--- a/src/userspace/libc/syscall.c
+++ b/src/userspace/libc/syscall.c
@@ -5,10 +5,12 @@
  */
 DEFN_SYSCALL0(halt, 0);
 
-DEFN_SYSCALL1(putch, 1, const char *);
+DEFN_SYSCALL1(exec, 1, char *);
 
-DEFN_SYSCALL0(getch, 2);
+DEFN_SYSCALL1(putch, 2, char *);
 
-DEFN_SYSCALL1(malloc, 3, uint32_t);
+DEFN_SYSCALL0(getch, 3);
 
-DEFN_SYSCALL1(free, 4, uint32_t);
\ No newline at end of file
+DEFN_SYSCALL1(malloc, 4, u32);
+
+DEFN_SYSCALL1(free, 5, u32);
diff --git a/src/userspace/libc/syscall.h b/src/userspace/libc/syscall.h
index 61ffecc..394118c 100644
--- a/src/userspace/libc/syscall.h
+++ b/src/userspace/libc/syscall.h
@@ -70,12 +70,14 @@
  */
 DECL_SYSCALL0(halt);
 
-DECL_SYSCALL1(putch, const char *);
+DECL_SYSCALL1(exec, char *);
+
+DECL_SYSCALL1(putch, char *);
 
 DECL_SYSCALL0(getch);
 
-DECL_SYSCALL1(malloc, uint32_t);
+DECL_SYSCALL1(malloc, u32);
 
-DECL_SYSCALL1(free, uint32_t);
+DECL_SYSCALL1(free, u32);
 
-#endif
\ No newline at end of file
+#endif
diff --git a/src/userspace/programs/init.c b/src/userspace/programs/init.c
index bf3c7f4..3011530 100644
--- a/src/userspace/programs/init.c
+++ b/src/userspace/programs/init.c
@@ -1,6 +1,9 @@
+#include <syscall.h>
+
 void main()
 {
-	// TODO: Exec shell
+	syscall_exec("/bin/sh");
+
 	while (1) {
 	};
-}
\ No newline at end of file
+}
diff --git a/src/userspace/programs/sh.c b/src/userspace/programs/sh.c
index 6dcb206..f477d6e 100644
--- a/src/userspace/programs/sh.c
+++ b/src/userspace/programs/sh.c
@@ -11,4 +11,4 @@ void main()
 	}
 
 	syscall_halt();
-}
\ No newline at end of file
+}