Begin work on `-target:windows_386`

3 files changed, 126 insertions, 56 deletions

diff --git a/core/runtime/procs_windows_386.odin b/core/runtime/procs_windows_386.odin
new file mode 100644
index 000000000..b2597ad67
--- /dev/null
+++ b/core/runtime/procs_windows_386.odin
@@ -0,0 +1,59 @@
+package runtime
+
+foreign import kernel32 "system:Kernel32.lib"
+
+@private
+@(link_name="_tls_index")
+_tls_index: u32;
+
+@private
+@(link_name="_fltused")
+_fltused: i32 = 0x9875;
+
+@(link_name="memcpy")
+memcpy :: proc "c" (dst, src: rawptr, len: int) -> rawptr {
+	foreign kernel32 {
+		RtlCopyMemory :: proc "c" (dst, src: rawptr, len: int) ---
+	}
+	RtlCopyMemory(dst, src, len);
+	return dst;
+}
+
+@(link_name="memmove")
+memmove :: proc "c" (dst, src: rawptr, len: int) -> rawptr {
+	foreign kernel32 {
+		RtlMoveMemory :: proc "c" (dst, src: rawptr, len: int) ---
+	}
+	RtlMoveMemory(dst, src, len);
+	return dst;
+}
+
+@(link_name="memset")
+memset :: proc "c" (ptr: rawptr, val: i32, len: int) -> rawptr {
+	d := uintptr(ptr);
+	b := byte(val);
+	for i in 0..<uintptr(len) {
+		(^byte)(d+i)^ = b;
+	}
+	return ptr;
+}
+
+// @(link_name="memcmp")
+// memcmp :: proc "c" (dst, src: rawptr, len: int) -> i32 {
+// 	if dst == nil || src == nil {
+// 		return 0;
+// 	}
+// 	if dst == src {
+// 		return 0;
+// 	}
+// 	d, s := uintptr(dst), uintptr(src);
+// 	n := uintptr(len);
+
+// 	for i := uintptr(0); i < n; i += 1 {
+// 		x, y := (^byte)(d+i)^, (^byte)(s+i)^;
+// 		if x != y {
+// 			return x < y ? -1 : +1;
+// 		}
+// 	}
+// 	return 0;
+// }
diff --git a/src/main.cpp b/src/main.cpp
index 95340f1fb..bee298738 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -50,7 +50,7 @@ i32 system_exec_command_line_app(char const *name, char const *fmt, ...) {
 	cmd_len = gb_snprintf_va(cmd_line, gb_size_of(cmd_line), fmt, va);
 	va_end(va);
 
-	// gb_printf_err("%.*s\n", cast(int)cmd_len, cmd_line);
+	gb_printf_err("%.*s\n", cast(int)cmd_len, cmd_line);
 
 	tmp = gb_temp_arena_memory_begin(&string_buffer_arena);
 	defer (gb_temp_arena_memory_end(tmp));
@@ -625,6 +625,7 @@ bool parse_build_flags(Array<String> args) {
 						}
 
 						case BuildFlag_Target: {
+							GB_ASSERT(value.kind == ExactValue_String);
 							String str = value.value_string;
 							bool found = false;
 
@@ -1201,7 +1202,7 @@ int main(int arg_count, char const **arg_ptr) {
 
 	init_build_context(selected_target_metrics ? selected_target_metrics->metrics : nullptr);
 	if (build_context.word_size == 4) {
-		print_usage_line(0, "%s 32-bit is not yet supported", args[0]);
+		print_usage_line(0, "%.*s 32-bit is not yet supported", LIT(args[0]));
 		return 1;
 	}
 
@@ -1294,16 +1295,13 @@ int main(int arg_count, char const **arg_ptr) {
 		return exit_code;
 	}
 
-	if (build_context.cross_compiling) {
-		if (0) {
+	if (build_context.cross_compiling && selected_target_metrics->metrics == &target_essence_amd64) {
 #ifdef GB_SYSTEM_UNIX
-		} else if (selected_target_metrics->metrics == &target_essence_amd64) {
-			system_exec_command_line_app("linker", "x86_64-essence-gcc \"%.*s.o\" -o \"%.*s\" %.*s",
-					LIT(output_base), LIT(output_base), LIT(build_context.link_flags));
+		system_exec_command_line_app("linker", "x86_64-essence-gcc \"%.*s.o\" -o \"%.*s\" %.*s",
+				LIT(output_base), LIT(output_base), LIT(build_context.link_flags));
+#else
+		gb_printf_err("Don't know how to cross compile to selected target.\n");
 #endif
-		} else {
-			gb_printf_err("Don't know how to cross compile to selected target.\n");
-		}
 	} else {
 	#if defined(GB_SYSTEM_WINDOWS)
 		timings_start_section(timings, str_lit("msvc-link"));
@@ -1312,6 +1310,36 @@ int main(int arg_count, char const **arg_ptr) {
 		defer (gb_string_free(lib_str));
 		char lib_str_buf[1024] = {0};
 
+		char const *output_ext = "exe";
+		gbString link_settings = gb_string_make_reserve(heap_allocator(), 256);
+		defer (gb_string_free(link_settings));
+
+
+		// NOTE(ic): It would be nice to extend this so that we could specify the Visual Studio version that we want instead of defaulting to the latest.
+		Find_Result_Utf8 find_result = find_visual_studio_and_windows_sdk_utf8();
+
+		if (find_result.windows_sdk_version == 0) {
+			gb_printf_err("Windows SDK not found.\n");
+			return 1;
+		}
+
+		// Add library search paths.
+		if (find_result.vs_library_path.len > 0) {
+			GB_ASSERT(find_result.windows_sdk_um_library_path.len > 0);
+			GB_ASSERT(find_result.windows_sdk_ucrt_library_path.len > 0);
+
+			String path = {};
+			auto add_path = [&](String path) {
+				if (path[path.len-1] == '\\') {
+					path.len -= 1;
+				}
+				link_settings = gb_string_append_fmt(link_settings, " /LIBPATH:\"%.*s\"", LIT(path));
+			};
+			add_path(find_result.windows_sdk_um_library_path);
+			add_path(find_result.windows_sdk_ucrt_library_path);
+			add_path(find_result.vs_library_path);
+		}
+
 		for_array(i, ir_gen.module.foreign_library_paths) {
 			String lib = ir_gen.module.foreign_library_paths[i];
 			GB_ASSERT(lib.len < gb_count_of(lib_str_buf)-1);
@@ -1320,9 +1348,7 @@ int main(int arg_count, char const **arg_ptr) {
 			lib_str = gb_string_appendc(lib_str, lib_str_buf);
 		}
 
-		char const *output_ext = "exe";
-		gbString link_settings = gb_string_make_reserve(heap_allocator(), 256);
-		defer (gb_string_free(link_settings));
+
 
 		if (build_context.is_dll) {
 			output_ext = "dll";
@@ -1345,31 +1371,6 @@ int main(int arg_count, char const **arg_ptr) {
 			link_settings = gb_string_append_fmt(link_settings, " /DEBUG");
 		}
 
-		// NOTE(ic): It would be nice to extend this so that we could specify the Visual Studio version that we want instead of defaulting to the latest.
-		Find_Result_Utf8 find_result = find_visual_studio_and_windows_sdk_utf8();
-		// defer(free_"resource"s(&find_result));
-
-		if (find_result.windows_sdk_version == 0) {
-			gb_printf_err("Windows SDK not found.\n");
-			return 1;
-		}
-
-		// Add library search paths.
-		if (find_result.vs_library_path.len > 0) {
-			GB_ASSERT(find_result.windows_sdk_um_library_path.len > 0);
-			GB_ASSERT(find_result.windows_sdk_ucrt_library_path.len > 0);
-
-			String path = {};
-			auto add_path = [&](String path) {
-				if (path[path.len-1] == '\\') {
-					path.len -= 1;
-				}
-				link_settings = gb_string_append_fmt(link_settings, " /LIBPATH:\"%.*s\"", LIT(path));
-			};
-			add_path(find_result.windows_sdk_um_library_path);
-			add_path(find_result.windows_sdk_ucrt_library_path);
-			add_path(find_result.vs_library_path);
-		}
 
 		if (!build_context.use_lld) { // msvc
 
@@ -1392,8 +1393,8 @@ int main(int arg_count, char const **arg_ptr) {
 					" %s "
 					"",
 					LIT(find_result.vs_exe_path), LIT(output_base), LIT(output_base), LIT(output_base), output_ext,
-					lib_str, LIT(build_context.link_flags),
-					link_settings
+					link_settings, LIT(build_context.link_flags),
+					lib_str
 				);
 			} else {
 				exit_code = system_exec_command_line_app("msvc-link",
@@ -1403,8 +1404,8 @@ int main(int arg_count, char const **arg_ptr) {
 					" %s "
 					"",
 					LIT(find_result.vs_exe_path), LIT(output_base), LIT(output_base), output_ext,
-					lib_str, LIT(build_context.link_flags),
-					link_settings
+					link_settings, LIT(build_context.link_flags),
+					lib_str
 				);
 			}
 		} else { // lld
@@ -1416,8 +1417,8 @@ int main(int arg_count, char const **arg_ptr) {
 				"",
 				LIT(build_context.ODIN_ROOT),
 				LIT(output_base), LIT(output_base), output_ext,
-				lib_str, LIT(build_context.link_flags),
-				link_settings
+				link_settings, LIT(build_context.link_flags),
+				lib_str
 			);
 		}
 
diff --git a/src/microsoft_craziness.h b/src/microsoft_craziness.h
index cfb0438df..1a94aff3f 100644
--- a/src/microsoft_craziness.h
+++ b/src/microsoft_craziness.h
@@ -202,7 +202,7 @@ wchar_t *concat(wchar_t *a, wchar_t *b, wchar_t *c = nullptr, wchar_t *d = nullp
     isize len_c = string16_len(c);
     isize len_d = string16_len(d);
 
-    wchar_t *result = (wchar_t *)malloc((len_a + len_b + len_c + len_d + 1) * 2);
+    wchar_t *result = (wchar_t *)calloc(2, (len_a + len_b + len_c + len_d + 1));
     gb_memmove(result, a, len_a*2);
     gb_memmove(result + len_a, b, len_b*2);
 
@@ -256,7 +256,7 @@ wchar_t *find_windows_kit_root(HKEY key, wchar_t *version) {
     if (rc != 0)  return NULL;
 
     DWORD length = required_length + 2;  // The +2 is for the maybe optional zero later on. Probably we are over-allocating.
-    wchar_t *value = (wchar_t *)malloc(length);
+    wchar_t *value = (wchar_t *)calloc(1, length);
     if (!value) return NULL;
 
     rc = RegQueryValueExW(key, version, NULL, NULL, (LPBYTE)value, &length);  // We know that version is zero-terminated...
@@ -448,7 +448,7 @@ bool find_visual_studio_by_fighting_through_microsoft_craziness(Find_Result *res
             auto version_bytes = (tools_file_size.QuadPart + 1) * 2;  // Warning: This multiplication by 2 presumes there is no variable-length encoding in the wchars (wacky characters in the file could betray this expectation).
             if (version_bytes > 0x7FFFFFFF) continue;   // Avoid overflow.
 
-            wchar_t *version = (wchar_t *)malloc(version_bytes);
+            wchar_t *version = (wchar_t *)calloc(1, version_bytes);
             defer (free(version));
 
             auto read_result = fgetws(version, (int)version_bytes, f);
@@ -516,7 +516,7 @@ bool find_visual_studio_by_fighting_through_microsoft_craziness(Find_Result *res
                 continue;
             }
 
-            auto buffer = (wchar_t *)malloc(cb_data);
+            auto buffer = (wchar_t *)calloc(1, cb_data);
             if (!buffer)  return false;
             defer (free(buffer));
 
@@ -530,7 +530,7 @@ bool find_visual_studio_by_fighting_through_microsoft_craziness(Find_Result *res
             if (build_context.metrics.arch == TargetArch_amd64) {
                 lib_path = concat(buffer, L"VC\\Lib\\amd64\\");
             } else if (build_context.metrics.arch == TargetArch_386) {
-                lib_path = concat(buffer, L"VC\\Lib\\386\\");
+                lib_path = concat(buffer, L"VC\\Lib\\");
             } else {
                 continue;
             }
@@ -540,7 +540,15 @@ bool find_visual_studio_by_fighting_through_microsoft_craziness(Find_Result *res
             defer (free(vcruntime_filename));
 
             if (os_file_exists(vcruntime_filename)) {
-                result->vs_exe_path     = concat(buffer, L"VC\\bin\\");
+                if (build_context.metrics.arch == TargetArch_amd64) {
+                    result->vs_exe_path = concat(buffer, L"VC\\bin\\");
+                } else if (build_context.metrics.arch == TargetArch_386) {
+                    // result->vs_exe_path = concat(buffer, L"VC\\bin\\amd64_x86\\");
+                    result->vs_exe_path = concat(buffer, L"VC\\bin\\x86_amd64\\");
+                } else {
+                    continue;
+                }
+
                 result->vs_library_path = lib_path;
                 return true;
             }
@@ -599,13 +607,15 @@ Find_Result_Utf8 find_visual_studio_and_windows_sdk_utf8() {
     r.vs_exe_path                   = mc_wstring_to_string(result.vs_exe_path);
     r.vs_library_path               = mc_wstring_to_string(result.vs_library_path);
 
-    // printf("windows_sdk_root:              %.*s\n", LIT(r.windows_sdk_root));
-    // printf("windows_sdk_um_library_path:   %.*s\n", LIT(r.windows_sdk_um_library_path));
-    // printf("windows_sdk_ucrt_library_path: %.*s\n", LIT(r.windows_sdk_ucrt_library_path));
-    // printf("vs_exe_path:                   %.*s\n", LIT(r.vs_exe_path));
-    // printf("vs_library_path:               %.*s\n", LIT(r.vs_library_path));
+#if 0
+    printf("windows_sdk_root:              %.*s\n", LIT(r.windows_sdk_root));
+    printf("windows_sdk_um_library_path:   %.*s\n", LIT(r.windows_sdk_um_library_path));
+    printf("windows_sdk_ucrt_library_path: %.*s\n", LIT(r.windows_sdk_ucrt_library_path));
+    printf("vs_exe_path:                   %.*s\n", LIT(r.vs_exe_path));
+    printf("vs_library_path:               %.*s\n", LIT(r.vs_library_path));
 
-    // gb_exit(1);
+    gb_exit(1);
+#endif
 
     return r;
 }