From aa8a8811818331cf511681327e3ba95e456f0d33 Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Sat, 2 May 2020 15:44:11 +0200
Subject: Added many syscalls to get better POSIX compliance

---
 src/kernel/syscall/actions/sys_exit.c     |  8 ++++++++
 src/kernel/syscall/actions/sys_fork.c     | 19 +++++++++++++++++++
 src/kernel/syscall/actions/sys_get_pid.c  |  7 +++++++
 src/kernel/syscall/actions/sys_pointers.c | 20 --------------------
 src/kernel/syscall/actions/sys_putch.c    |  9 ---------
 src/kernel/syscall/actions/sys_read.c     | 22 ++++++++++++++++++++++
 src/kernel/syscall/actions/sys_scancode.c | 11 -----------
 src/kernel/syscall/actions/sys_write.c    | 22 ++++++++++++++++++++++
 8 files changed, 78 insertions(+), 40 deletions(-)
 create mode 100644 src/kernel/syscall/actions/sys_exit.c
 create mode 100644 src/kernel/syscall/actions/sys_fork.c
 create mode 100644 src/kernel/syscall/actions/sys_get_pid.c
 delete mode 100644 src/kernel/syscall/actions/sys_pointers.c
 delete mode 100644 src/kernel/syscall/actions/sys_putch.c
 create mode 100644 src/kernel/syscall/actions/sys_read.c
 delete mode 100644 src/kernel/syscall/actions/sys_scancode.c
 create mode 100644 src/kernel/syscall/actions/sys_write.c

(limited to 'src/kernel/syscall/actions')

diff --git a/src/kernel/syscall/actions/sys_exit.c b/src/kernel/syscall/actions/sys_exit.c
new file mode 100644
index 0000000..e2761fd
--- /dev/null
+++ b/src/kernel/syscall/actions/sys_exit.c
@@ -0,0 +1,8 @@
+#include <stdint.h>
+#include <kernel/tasks/process.h>
+
+uint32_t sys_exit(uint32_t code)
+{
+	current_proc->state = PROC_ASLEEP;
+	return code;
+}
\ No newline at end of file
diff --git a/src/kernel/syscall/actions/sys_fork.c b/src/kernel/syscall/actions/sys_fork.c
new file mode 100644
index 0000000..af64ff9
--- /dev/null
+++ b/src/kernel/syscall/actions/sys_fork.c
@@ -0,0 +1,19 @@
+#include <stdint.h>
+#include <kernel/interrupts/interrupts.h>
+#include <kernel/memory/paging.h>
+#include <kernel/tasks/process.h>
+#include <kernel/lib/lib.h>
+
+uint32_t sys_fork(struct regs *r)
+{
+	struct page_directory *dir = paging_copy_user_directory(current_proc->cr3);
+	struct process *proc = process_make_new();
+	proc->cr3 = dir;
+	memcpy(&proc->registers, r, sizeof(struct regs));
+	proc->registers.eax = proc->pid;
+	proc->pid = current_proc->pid;
+
+	process_spawn(proc);
+
+	return 0;
+}
\ No newline at end of file
diff --git a/src/kernel/syscall/actions/sys_get_pid.c b/src/kernel/syscall/actions/sys_get_pid.c
new file mode 100644
index 0000000..7631230
--- /dev/null
+++ b/src/kernel/syscall/actions/sys_get_pid.c
@@ -0,0 +1,7 @@
+#include <stdint.h>
+#include <kernel/tasks/process.h>
+
+uint32_t sys_get_pid()
+{
+	return current_proc->pid;
+}
\ No newline at end of file
diff --git a/src/kernel/syscall/actions/sys_pointers.c b/src/kernel/syscall/actions/sys_pointers.c
deleted file mode 100644
index 1a9a5cf..0000000
--- a/src/kernel/syscall/actions/sys_pointers.c
+++ /dev/null
@@ -1,20 +0,0 @@
-#include <stdint.h>
-#include <kernel/graphics/vesa.h>
-#include <kernel/fs/load.h>
-#include <kernel/memory/alloc.h>
-#include <kernel/memory/paging.h>
-#include <kernel/tasks/process.h>
-
-struct pointers {
-	struct vbe_mode_info *current_mode_info;
-	struct font *font;
-};
-
-uint32_t sys_pointers()
-{
-	struct pointers *pointers = umalloc(sizeof(struct vbe_mode_info) + sizeof(struct font));
-	pointers->current_mode_info = current_mode_info;
-	pointers->font = font;
-
-	return pointers;
-}
\ No newline at end of file
diff --git a/src/kernel/syscall/actions/sys_putch.c b/src/kernel/syscall/actions/sys_putch.c
deleted file mode 100644
index beaa4a2..0000000
--- a/src/kernel/syscall/actions/sys_putch.c
+++ /dev/null
@@ -1,9 +0,0 @@
-#include <stdint.h>
-#include <kernel/lib/stdio.h>
-#include <kernel/lib/string.h>
-
-uint32_t sys_putch(char ch)
-{
-	putch(ch);
-	return 0;
-}
\ No newline at end of file
diff --git a/src/kernel/syscall/actions/sys_read.c b/src/kernel/syscall/actions/sys_read.c
new file mode 100644
index 0000000..a954f56
--- /dev/null
+++ b/src/kernel/syscall/actions/sys_read.c
@@ -0,0 +1,22 @@
+#include <stdint.h>
+#include <kernel/fs/vfs.h>
+#include <kernel/fs/ext2.h>
+#include <kernel/lib/stdlib.h>
+#include <kernel/memory/alloc.h>
+
+uint32_t sys_read(char *path, uint32_t offset, uint32_t count, char *buf)
+{
+	struct fs_node *node = (struct fs_node *)umalloc(sizeof(struct fs_node));
+	strcpy(node->name, path);
+	ext2_root->open(node);
+	if (node->inode != 0) {
+		uint32_t size = ((struct ext2_file *)node->impl)->inode.size;
+		ext2_root->read(node, 0, size, buf);
+		buf[size - 1] = '\0';
+		ext2_root->close(node);
+		return size;
+	} else {
+		ext2_root->close(node);
+		return -1;
+	}
+}
\ No newline at end of file
diff --git a/src/kernel/syscall/actions/sys_scancode.c b/src/kernel/syscall/actions/sys_scancode.c
deleted file mode 100644
index 612326a..0000000
--- a/src/kernel/syscall/actions/sys_scancode.c
+++ /dev/null
@@ -1,11 +0,0 @@
-#include <stdint.h>
-#include <kernel/input/input.h>
-#include <kernel/io/io.h>
-
-uint32_t sys_scancode()
-{
-	sti();
-	uint32_t key = wait_scancode();
-	cli();
-	return key;
-}
\ No newline at end of file
diff --git a/src/kernel/syscall/actions/sys_write.c b/src/kernel/syscall/actions/sys_write.c
new file mode 100644
index 0000000..d79ef37
--- /dev/null
+++ b/src/kernel/syscall/actions/sys_write.c
@@ -0,0 +1,22 @@
+#include <stdint.h>
+#include <kernel/fs/vfs.h>
+#include <kernel/fs/ext2.h>
+#include <kernel/lib/stdlib.h>
+#include <kernel/memory/alloc.h>
+
+uint32_t sys_write(char *path, uint32_t offset, uint32_t count, char *buf)
+{
+	struct fs_node *node = (struct fs_node *)umalloc(sizeof(struct fs_node));
+	strcpy(node->name, path);
+	ext2_root->open(node);
+	if (node->inode != 0) {
+		uint32_t size = ((struct ext2_file *)node->impl)->inode.size;
+		ext2_root->write(node, 0, size, buf);
+		buf[size - 1] = '\0';
+		ext2_root->close(node);
+		return size;
+	} else {
+		ext2_root->close(node);
+		return -1;
+	}
+}
\ No newline at end of file
-- 
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