Added support for multiple user applications

12 files changed, 21 insertions, 125 deletions

diff --git a/src/bootloader/grub.cfg b/src/bootloader/grub.cfg
index 75d4934..cdd19b4 100644
--- a/src/bootloader/grub.cfg
+++ b/src/bootloader/grub.cfg
@@ -1,6 +1,6 @@
 set timeout=0
 set default=0
 menuentry "Melvix" {
-    multiboot2 /boot/kernel.bin
+    multiboot2 /boot/kernel.bin foo bar
     boot
 }
\ No newline at end of file
diff --git a/src/kernel/acpi/acpi.c b/src/kernel/acpi/acpi.c
index 865435f..3e07171 100644
--- a/src/kernel/acpi/acpi.c
+++ b/src/kernel/acpi/acpi.c
@@ -35,6 +35,7 @@ void acpi_init(struct rsdp *rsdp)
 	hpet = (struct hpet *)kmalloc(sizeof(struct hpet));
 	madt = (struct madt *)kmalloc(sizeof(struct madt));
 
+	// TODO: Fix ACPI table discovering (HPET & MADT missing)
 	if (strncmp(rsdp->signature, "RSD PTR ", 8) == 0) {
 		memcpy(rsdt, rsdp->rsdt_address, sizeof(struct rsdt) + 32);
 		debug("Found RSDT");
diff --git a/src/kernel/graphics/vesa.c b/src/kernel/graphics/vesa.c
index 43b0799..898a0f3 100644
--- a/src/kernel/graphics/vesa.c
+++ b/src/kernel/graphics/vesa.c
@@ -122,6 +122,8 @@ void set_optimal_resolution()
 		if (mode_info->width > vbe_width ||
 		    (mode_info->width == vbe_width && (mode_info->bpp >> 3) > vbe_bpl)) {
 			// if (mode_info->bpp == 32) { // Force specific bpp for debugging
+			debug("Found mode: %dx%dx%d", mode_info->width, mode_info->height,
+			      mode_info->bpp);
 			highest = *mode;
 			vbe_width = mode_info->width;
 			vbe_height = mode_info->height;
diff --git a/src/kernel/kernel.c b/src/kernel/kernel.c
index 3efe193..90b967f 100644
--- a/src/kernel/kernel.c
+++ b/src/kernel/kernel.c
@@ -44,9 +44,8 @@ void kernel_main(uint32_t magic, uint32_t multiboot_address, uint32_t esp)
 	isrs_install();
 	irq_install();
 
+	// multiboot_parse(multiboot_address); // TODO: Why does this break graphics?
 	paging_install();
-	log("0x%x", multiboot_address); // TODO: Fix multiboot table mmap
-	multiboot_parse(multiboot_address);
 
 	// Install drivers
 	cli();
@@ -65,10 +64,10 @@ void kernel_main(uint32_t magic, uint32_t multiboot_address, uint32_t esp)
 
 	load_binaries();
 	set_optimal_resolution();
-	printf("%s", read_file("/etc/test"));
+	printf("Content of /etc/test: %s", read_file("/etc/test"));
 
 	syscalls_install();
-	struct process *proc = elf_load("/bin/sh");
+	struct process *proc = elf_load("/bin/init");
 	if (proc) {
 		proc->stdin = NULL;
 		proc->stdout = NULL;
@@ -76,7 +75,6 @@ void kernel_main(uint32_t magic, uint32_t multiboot_address, uint32_t esp)
 		process_init(proc);
 	}
 
-	log("Okidoko!");
 	halt_loop();
 	// asm ("div %0" :: "r"(0)); // Exception testing x/0
 }
\ No newline at end of file
diff --git a/src/kernel/lib/memory.c b/src/kernel/lib/memory.c
index 30f75f9..819a70f 100644
--- a/src/kernel/lib/memory.c
+++ b/src/kernel/lib/memory.c
@@ -58,6 +58,7 @@ uint32_t memory_get_free()
 void memory_print()
 {
 	if (meminfo != NULL) {
+		// TODO: Fix multiboot mem lower/upper
 		info("Mem lower: 0x%x", meminfo->mem_lower);
 		info("Mem upper: 0x%x", meminfo->mem_upper);
 	}
diff --git a/src/kernel/multiboot.c b/src/kernel/multiboot.c
index 086e628..e922ee7 100644
--- a/src/kernel/multiboot.c
+++ b/src/kernel/multiboot.c
@@ -15,7 +15,8 @@ void multiboot_parse(uint32_t multiboot_address)
 	     tag = (struct multiboot_tag *)((multiboot_uint8_t *)tag + ((tag->size + 7) & ~7))) {
 		switch (tag->type) {
 		case MULTIBOOT_TAG_TYPE_CMDLINE:
-			debug("Got cmdline");
+			// TODO: Add cmdline config support
+			debug("Got cmdline: %s", ((struct multiboot_tag_string *)tag)->string);
 			break;
 		case MULTIBOOT_TAG_TYPE_BOOT_LOADER_NAME:
 			debug("Got bootloader name: %s",
diff --git a/src/kernel/syscall.c b/src/kernel/syscall.c
deleted file mode 100644
index 68750e1..0000000
--- a/src/kernel/syscall.c
+++ /dev/null
@@ -1,20 +0,0 @@
-#include <kernel/syscall.h>
-
-/**
- * DEFINITIONS
- */
-DEFN_SYSCALL0(halt, 0);
-
-DEFN_SYSCALL1(write, 1, const char *);
-
-DEFN_SYSCALL1(read, 2, const char *);
-
-DEFN_SYSCALL1(writec, 3, char);
-
-DEFN_SYSCALL0(readc, 4);
-
-DEFN_SYSCALL0(get_pointers, 5);
-
-DEFN_SYSCALL1(alloc, 6, uint32_t);
-
-DEFN_SYSCALL1(free, 7, uint32_t);
\ No newline at end of file
diff --git a/src/kernel/syscall.h b/src/kernel/syscall.h
deleted file mode 100644
index 9f5bdb0..0000000
--- a/src/kernel/syscall.h
+++ /dev/null
@@ -1,87 +0,0 @@
-#ifndef MELVIX_SYSCALL_H
-#define MELVIX_SYSCALL_H
-
-#include <stdint.h>
-
-#define DECL_SYSCALL0(fn) int syscall_##fn();
-#define DECL_SYSCALL1(fn, p1) int syscall_##fn(p1);
-#define DECL_SYSCALL2(fn, p1, p2) int syscall_##fn(p1, p2);
-#define DECL_SYSCALL3(fn, p1, p2, p3) int syscall_##fn(p1, p2, p3);
-#define DECL_SYSCALL4(fn, p1, p2, p3, p4) int syscall_##fn(p1, p2, p3, p4);
-#define DECL_SYSCALL5(fn, p1, p2, p3, p4, p5) int syscall_##fn(p1, p2, p3, p4, p5);
-
-#define DEFN_SYSCALL0(fn, num)                                                                     \
-	int syscall_##fn()                                                                         \
-	{                                                                                          \
-		int a;                                                                             \
-		asm volatile("int $0x80" : "=a"(a) : "0"(num));                                    \
-		return a;                                                                          \
-	}
-
-#define DEFN_SYSCALL1(fn, num, P1)                                                                 \
-	int syscall_##fn(P1 p1)                                                                    \
-	{                                                                                          \
-		int a;                                                                             \
-		asm volatile("int $0x80" : "=a"(a) : "0"(num), "b"((int)p1));                      \
-		return a;                                                                          \
-	}
-
-#define DEFN_SYSCALL2(fn, num, P1, P2)                                                             \
-	int syscall_##fn(P1 p1, P2 p2)                                                             \
-	{                                                                                          \
-		int a;                                                                             \
-		asm volatile("int $0x80" : "=a"(a) : "0"(num), "b"((int)p1), "c"((int)p2));        \
-		return a;                                                                          \
-	}
-
-#define DEFN_SYSCALL3(fn, num, P1, P2, P3)                                                         \
-	int syscall_##fn(P1 p1, P2 p2, P3 p3)                                                      \
-	{                                                                                          \
-		int a;                                                                             \
-		asm volatile("int $0x80"                                                           \
-			     : "=a"(a)                                                             \
-			     : "0"(num), "b"((int)p1), "c"((int)p2), "d"((int)p3));                \
-		return a;                                                                          \
-	}
-
-#define DEFN_SYSCALL4(fn, num, P1, P2, P3, P4)                                                     \
-	int syscall_##fn(P1 p1, P2 p2, P3 p3, P4 p4)                                               \
-	{                                                                                          \
-		int a;                                                                             \
-		asm volatile("int $0x80"                                                           \
-			     : "=a"(a)                                                             \
-			     : "0"(num), "b"((int)p1), "c"((int)p2), "d"((int)p3), "S"((int)p4));  \
-		return a;                                                                          \
-	}
-
-#define DEFN_SYSCALL5(fn, num)                                                                     \
-	int syscall_##fn(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5)                                        \
-	{                                                                                          \
-		int a;                                                                             \
-		asm volatile("int $0x80"                                                           \
-			     : "=a"(a)                                                             \
-			     : "0"(num), "b"((int)p1), "c"((int)p2), "d"((int)p3), "S"((int)p4),   \
-			       "D"((int)p5));                                                      \
-		return a;                                                                          \
-	}
-
-/**
- * DECLARATIONS
- */
-DECL_SYSCALL0(halt);
-
-DECL_SYSCALL1(write, const char *);
-
-DECL_SYSCALL1(read, const char *);
-
-DECL_SYSCALL1(writec, char);
-
-DECL_SYSCALL0(readc);
-
-DECL_SYSCALL0(get_pointers);
-
-DECL_SYSCALL1(alloc, uint32_t);
-
-DECL_SYSCALL1(free, uint32_t);
-
-#endif
\ No newline at end of file
diff --git a/src/kernel/syscall/syscall.c b/src/kernel/syscall/syscall.c
index a106f07..ca12118 100644
--- a/src/kernel/syscall/syscall.c
+++ b/src/kernel/syscall/syscall.c
@@ -8,7 +8,7 @@
 typedef uint32_t (*syscall_func)(uint32_t, ...);
 
 uint32_t (*syscalls[])() = { [0] = (uint32_t(*)())halt_loop, // DEBUG!
-			     [1] = sys_putch,
+			     [1] = (uint32_t(*)())sys_putch,
 			     [2] = sys_getch,
 			     [3] = sys_malloc,
 			     [4] = sys_free };
diff --git a/src/userspace/libc/syscall.h b/src/userspace/libc/syscall.h
index 9f5bdb0..61ffecc 100644
--- a/src/userspace/libc/syscall.h
+++ b/src/userspace/libc/syscall.h
@@ -70,17 +70,11 @@
  */
 DECL_SYSCALL0(halt);
 
-DECL_SYSCALL1(write, const char *);
+DECL_SYSCALL1(putch, const char *);
 
-DECL_SYSCALL1(read, const char *);
+DECL_SYSCALL0(getch);
 
-DECL_SYSCALL1(writec, char);
-
-DECL_SYSCALL0(readc);
-
-DECL_SYSCALL0(get_pointers);
-
-DECL_SYSCALL1(alloc, uint32_t);
+DECL_SYSCALL1(malloc, uint32_t);
 
 DECL_SYSCALL1(free, uint32_t);
 
diff --git a/src/userspace/linker.ld b/src/userspace/linker.ld
index 8ede485..69018c4 100644
--- a/src/userspace/linker.ld
+++ b/src/userspace/linker.ld
@@ -1,4 +1,4 @@
-ENTRY(_start)
+ENTRY(main)
 SECTIONS
 {
 	.text 0x40000000:
diff --git a/src/userspace/programs/init.c b/src/userspace/programs/init.c
new file mode 100644
index 0000000..bf3c7f4
--- /dev/null
+++ b/src/userspace/programs/init.c
@@ -0,0 +1,6 @@
+void main()
+{
+	// TODO: Exec shell
+	while (1) {
+	};
+}
\ No newline at end of file