smaller stack; complete vector table

link.ld

@@ -46,7 +46,7 @@ SECTIONS {
 	.stack : {
 		. = ALIGN(4);
 		_bstack = .;
-                . += 2048;
+                . += 1024;
 		_tstack = .;
 	} > RAM
 }

src/bootstrap.s

@@ -5,6 +5,8 @@
 .extern _tstack
 
 .section .vector_table
+.global init_vector_table
+init_vector_table:
     .word _tstack
     .word _start
     .skip 4 * 14

src/interrupt.zig

@@ -1,8 +1,10 @@
-const vector_table_type = [256] *const fn () void;
+extern const init_vector_table: [2]u32;
+
+const vector_table_type = [128] *const fn () void; // up to 256
 var vector_table: vector_table_type align(256) = undefined;
 var vtor: **volatile vector_table_type = @ptrFromInt(0xE000ED08);
 
-pub const vector = enum(u8) {
+pub const vector = enum(u7) {
     NMI = 2,
     HardFault,
     MemManage,
@@ -20,6 +22,8 @@ pub const vector = enum(u8) {
 };
 
 pub fn initialize() void {
+    vector_table[0] = @ptrFromInt(init_vector_table[0]);
+    vector_table[1] = @ptrFromInt(init_vector_table[1]);
     register(.NMI, nmi);
     register(.HardFault, hardfault);
     register(.MemManage, memmanage);