From bd1fe4b2a85f88caac78b653f5b16b0258aa85c7 Mon Sep 17 00:00:00 2001
From: Imbus <>
Date: Mon, 1 Apr 2024 11:09:45 +0200
Subject: [PATCH] Initial

---
 hello.s  | 16 ++++++++++++++++
 main.s   | 12 ++++++++++++
 makefile | 35 +++++++++++++++++++++++++++++++++++
 3 files changed, 63 insertions(+)
 create mode 100644 hello.s
 create mode 100644 main.s
 create mode 100644 makefile

diff --git a/hello.s b/hello.s
new file mode 100644
index 0000000..1a6b2b7
--- /dev/null
+++ b/hello.s
@@ -0,0 +1,16 @@
+.section .text
+.globl _hello
+
+_hello:
+    # Write the string "Hello, World!\n" to stdout
+    la a0, msg              # Load the address of the string into a0
+    li a7, 4                # syscall number for write
+    li a1, 13               # Length of the string
+    li a2, 1                # File descriptor: stdout
+    ecall                   # Make the system call to write
+
+    ret                     # Return from the function
+
+.section .data
+msg:
+    .ascii "Hello, World!\n"
diff --git a/main.s b/main.s
new file mode 100644
index 0000000..faa2533
--- /dev/null
+++ b/main.s
@@ -0,0 +1,12 @@
+.section .text
+.globl _start
+
+_start:
+    # Call the hello function
+    lui a0, %hi(_hello)    # Load upper immediate of _hello address
+    addi a0, a0, %lo(_hello)  # Add lower immediate of _hello address
+    jalr ra, a0, 0          # Jump and link to _hello, ra is return address
+
+    # Exit the program
+    li a7, 10               # syscall number for exit
+    ecall                   # Make the system call to exit
diff --git a/makefile b/makefile
new file mode 100644
index 0000000..c5ab1b6
--- /dev/null
+++ b/makefile
@@ -0,0 +1,35 @@
+# Compiler and assembler
+CC = riscv64-linux-gnu-gcc
+AS = riscv64-linux-gnu-as
+LD = riscv64-linux-gnu-ld
+
+# Flags for compiler and assembler
+CFLAGS = -static -nostartfiles -nostdlib
+ASFLAGS =
+
+# QEMU command and flags
+QEMU = qemu-riscv64-static
+QEMU_FLAGS =
+
+# Assembly source files
+AS_SRCS := $(wildcard *.s)
+
+# Object files
+OBJS := $(AS_SRCS:.s=.o)
+
+# Default target
+all: $(OBJS)
+	$(LD) -o program $(OBJS)	
+# $(CC) $(CFLAGS) -o program $(OBJS)
+
+# Compile assembly sources
+%.o: %.s
+	$(AS) $(ASFLAGS) -o $@ $<
+
+# Run the program in QEMU
+run: all
+	$(QEMU) $(QEMU_FLAGS) ./program
+
+# Clean up
+clean:
+	rm -f program $(OBJS)