From b933a9955a2a1eb0ab32b232e23d24dc207cba46 Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Sun, 9 Aug 2020 18:50:17 +0200
Subject: Added syscall templates

---
 lib/Makefile  |  3 ++-
 lib/cpu.c     |  6 ++++++
 lib/inc/cpu.h |  1 +
 lib/inc/sys.h | 16 ++++++++++++++++
 lib/print.c   |  2 ++
 lib/serial.c  |  2 ++
 lib/sys.c     | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 7 files changed, 86 insertions(+), 1 deletion(-)
 create mode 100644 lib/inc/sys.h
 create mode 100644 lib/sys.c

(limited to 'lib')

diff --git a/lib/Makefile b/lib/Makefile
index 4190ec8..730ed6d 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -7,7 +7,8 @@ COBJS = str.o \
 	conv.o \
 	print.o \
 	serial.o \
-	cpu.o
+	cpu.o \
+	sys.o
 CC = ../cross/opt/bin/i686-elf-gcc
 LD = ../cross/opt/bin/i686-elf-ld
 OC = ../cross/opt/bin/i686-elf-ar
diff --git a/lib/cpu.c b/lib/cpu.c
index 5c27c51..5ed9de9 100644
--- a/lib/cpu.c
+++ b/lib/cpu.c
@@ -67,3 +67,9 @@ void idle()
 	while (1)
 		hlt();
 }
+
+void loop()
+{
+	cli();
+	idle();
+}
diff --git a/lib/inc/cpu.h b/lib/inc/cpu.h
index eb09291..2d367cb 100644
--- a/lib/inc/cpu.h
+++ b/lib/inc/cpu.h
@@ -17,6 +17,7 @@ void cli();
 void sti();
 void hlt();
 void idle();
+void loop();
 
 static inline void spinlock(int *ptr)
 {
diff --git a/lib/inc/sys.h b/lib/inc/sys.h
new file mode 100644
index 0000000..aaeb6ca
--- /dev/null
+++ b/lib/inc/sys.h
@@ -0,0 +1,16 @@
+// MIT License, Copyright (c) 2020 Marvin Borner
+// Syscall implementation
+
+#ifndef SYS_H
+#define SYS_H
+
+enum sys { SYS_HALT, SYS_EXEC };
+
+int sys0(enum sys num);
+int sys1(enum sys num, int d1);
+int sys2(enum sys num, int d1, int d2);
+int sys3(enum sys num, int d1, int d2, int d3);
+int sys4(enum sys num, int d1, int d2, int d3, int d4);
+int sys5(enum sys num, int d1, int d2, int d3, int d4, int d5);
+
+#endif
diff --git a/lib/print.c b/lib/print.c
index 1cbed69..84c4975 100644
--- a/lib/print.c
+++ b/lib/print.c
@@ -1,3 +1,5 @@
+// MIT License, Copyright (c) 2020 Marvin Borner
+
 #include <arg.h>
 #include <conv.h>
 #include <def.h>
diff --git a/lib/serial.c b/lib/serial.c
index dcee4dd..28de140 100644
--- a/lib/serial.c
+++ b/lib/serial.c
@@ -1,3 +1,5 @@
+// MIT License, Copyright (c) 2020 Marvin Borner
+
 #include <cpu.h>
 #include <def.h>
 #include <str.h>
diff --git a/lib/sys.c b/lib/sys.c
new file mode 100644
index 0000000..d676445
--- /dev/null
+++ b/lib/sys.c
@@ -0,0 +1,57 @@
+// MIT License, Copyright (c) 2020 Marvin Borner
+// Syscall implementation
+
+#include <sys.h>
+
+/**
+ * Definitions
+ */
+
+int sys0(enum sys num)
+{
+	int a;
+	__asm__ volatile("int $0x80" : "=a"(a) : "0"(num));
+	return a;
+}
+
+int sys1(enum sys num, int d1)
+{
+	int a;
+	__asm__ volatile("int $0x80" : "=a"(a) : "0"(num), "b"((int)d1));
+	return a;
+}
+
+int sys2(enum sys num, int d1, int d2)
+{
+	int a;
+	__asm__ volatile("int $0x80" : "=a"(a) : "0"(num), "b"((int)d1), "c"((int)d2));
+	return a;
+}
+
+int sys3(enum sys num, int d1, int d2, int d3)
+{
+	int a;
+	__asm__ volatile("int $0x80"
+			 : "=a"(a)
+			 : "0"(num), "b"((int)d1), "c"((int)d2), "d"((int)d3));
+	return a;
+}
+
+int sys4(enum sys num, int d1, int d2, int d3, int d4)
+{
+	int a;
+	__asm__ volatile("int $0x80"
+			 : "=a"(a)
+			 : "0"(num), "b"((int)d1), "c"((int)d2), "d"((int)d3), "S"((int)d4));
+	return a;
+}
+
+int sys5(enum sys num, int d1, int d2, int d3, int d4, int d5)
+{
+	int a;
+	__asm__ volatile("int $0x80"
+			 : "=a"(a)
+			 : "0"(num), "b"((int)d1), "c"((int)d2), "d"((int)d3), "S"((int)d4),
+			   "D"((int)d5));
+	return a;
+}
-- 
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