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[MAIN]: Rewrote init_mods to load tar archives and run main.wasm

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luccie 2025-08-11 18:36:00 +02:00
parent f0af9b9955
commit 120da3e3cd
4 changed files with 84 additions and 25 deletions
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9
src/mods/vm.zig
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@ -103,9 +103,6 @@ pub const Runtime = struct {
pub fn init(allocator: Allocator, module: Module, global_runtime: *wasm.GlobalRuntime) !Runtime {
// if memory max is not set the memory is allowed to grow but it is not supported at the moment
const max = module.memory.max orelse module.memory.min;
if (module.memory.max == null) {
std.log.warn("Growing memory is not yet supported, usign the minimum memory\n", .{});
}
const memory = try allocator.alloc(u8, max);
@memset(memory, 0);
@memcpy(memory[0..module.data.len], module.data);
@ -336,8 +333,12 @@ pub const Runtime = struct {
.memorysize => @panic("UNIMPLEMENTED"),
.memorygrow => {
const newPages = self.stack.pop().?.i32;
const newSize = (self.memory.len / Parser.PAGE_SIZE) + @as(usize, @intCast(newPages));
if (self.module.memory.max != null and newSize > self.module.memory.max.?){
std.debug.panic("Mod failed to stay within memory range\n", .{});
}
const oldPages: i32 = @intCast(self.memory.len / Parser.PAGE_SIZE);
self.memory = try allocator.realloc(self.memory, self.memory.len + @as(usize, @intCast(newPages * Parser.PAGE_SIZE)));
self.memory = try allocator.realloc(self.memory, newSize * Parser.PAGE_SIZE);
try self.stack.append(.{ .i32 = oldPages });
},
.memoryinit => @panic("UNIMPLEMENTED"),