initial commit

2 files changed, 51 insertions, 0 deletions

diff --git a/src/bootstrap.s b/src/bootstrap.s
new file mode 100644
index 0000000..22f66f0
--- /dev/null
+++ b/src/bootstrap.s
@@ -0,0 +1,38 @@
+.cpu cortex-m4
+.thumb
+
+.extern _start
+.extern fault_handler
+
+.section .text
+
+fault1:
+    mov r0, 1
+    b fault_handler
+fault2:
+    mov r0, 2
+    b fault_handler
+fault3:
+    mov r0, 3
+    b fault_handler
+fault4:
+    mov r0, 4
+    b fault_handler
+fault5:
+    mov r0, 5
+    b fault_handler
+
+.section .bss
+.skip 128
+stack_top:
+
+.section .isr_vector
+    .word stack_top
+    .word _start
+    .word fault1
+    .word fault2
+    .word fault3
+    .word fault4
+    .word fault5
+    .skip 4 * 91
+
diff --git a/src/main.zig b/src/main.zig
new file mode 100644
index 0000000..de602dd
--- /dev/null
+++ b/src/main.zig
@@ -0,0 +1,13 @@
+//! By convention, main.zig is where your main function lives in the case that
+//! you are building an executable. If you are making a library, the convention
+//! is to delete this file and start with root.zig instead.
+//const std = @import("std");
+
+export fn _start() callconv(.C) noreturn {
+    while (true) {}
+}
+
+export fn fault_handler() callconv(.C) void {
+    while (true) {}
+}
+