refactor: use uefi-amd64.json instead of modify target.go

compileopts/target.go

@@ -375,43 +375,6 @@ func defaultTarget(goos, goarch, triple string) (*TargetSpec, error) {
 			"--no-insert-timestamp",
 			"--no-dynamicbase",
 		)
-	} else if goos == "uefi" {
-		spec.Triple = strings.ReplaceAll(triple, "-unknown-uefi", "-unknown-windows-gnu")
-		spec.GOOS = "linux"
-		spec.Linker = "ld.lld"
-		spec.Libc = "picolibc"
-		spec.BuildTags = append(spec.BuildTags, "baremetal")
-		spec.CFlags = append(spec.CFlags,
-			"-ffreestanding",
-			"-fshort-wchar",
-			"-fshort-enums",
-			"-mno-red-zone",
-		)
-		switch goarch {
-		case "amd64", "i386":
-			spec.LDFlags = append(spec.LDFlags,
-				"-m", "i386pep",
-				"--image-base", "0x400000",
-			)
-			spec.ExtraFiles = append(spec.ExtraFiles,
-				"src/device/x86/cpu_"+goarch+".S",
-			)
-		case "arm64":
-			spec.LDFlags = append(spec.LDFlags,
-				"-m", "arm64pe",
-			)
-		}
-		spec.LDFlags = append(spec.LDFlags,
-			"--entry", "efi_main",
-			"--subsystem", "efi_application",
-			"-Bdynamic",
-			"--gc-sections",
-			"--no-insert-timestamp",
-			"--no-dynamicbase",
-		)
-		spec.ExtraFiles = append(spec.ExtraFiles,
-			"src/machine/uefi/asm_"+goarch+".S",
-		)
 	} else if goos == "wasip1" {
 		spec.GC = "" // use default GC
 		spec.Scheduler = "asyncify"
@@ -433,7 +396,7 @@ func defaultTarget(goos, goarch, triple string) (*TargetSpec, error) {
 	}
 	if goarch != "wasm" {
 		suffix := ""
-		if (goos == "windows" || goos == "uefi") && goarch == "amd64" {
+		if goos == "windows" && goarch == "amd64" {
 			// Windows uses a different calling convention on amd64 from other
 			// operating systems so we need separate assembly files.
 			suffix = "_windows"

targets/uefi-amd64.json

@@ -0,0 +1,40 @@
+{
+  "build-tags": ["uefi", "baremetal", "linux", "amd64"],
+  "llvm-target": "x86_64-unknown-windows-gnu",
+  "goos": "linux",
+  "goarch": "amd64",
+  "gc": "precise",
+  "linker": "ld.lld",
+  "libc": "picolibc",
+  "scheduler": "tasks",
+  "automatic-stack-size": false,
+  "default-stack-size": 65536,
+  "cflags": [
+    "-Werror",
+    "-fshort-enums",
+    "-fomit-frame-pointer",
+    "-mfloat-abi=soft",
+    "-fno-exceptions", "-fno-unwind-tables", "-fno-asynchronous-unwind-tables",
+    "-ffunction-sections", "-fdata-sections",
+    "-ffreestanding",
+    "-fshort-wchar",
+    "-mno-red-zone"
+  ],
+  "ldflags": [
+    "-m", "i386pep",
+    "--image-base", "0x400000",
+    "--entry", "efi_main",
+    "--subsystem", "efi_application",
+    "-Bdynamic",
+    "--gc-sections",
+    "--no-insert-timestamp",
+    "--no-dynamicbase"
+  ],
+  "extra-files": [
+    "src/device/x86/cpu_amd64.S",
+    "src/machine/uefi/asm_amd64.S",
+    "src/internal/task/task_stack_amd64_windows.S",
+    "src/runtime/asm_amd64_windows.S"
+  ],
+  "gdb": ["gdb-multiarch", "gdb"]
+}