add loongarch support for buildkit archutil

Signed-off-by: yzewei <[email protected]>

util/archutil/Dockerfile

@@ -1,4 +1,4 @@
-FROM debian:bullseye-slim AS base
+FROM debian:trixie-slim AS base
 RUN apt-get update && apt-get --no-install-recommends install -y \
   gcc-x86-64-linux-gnu \
   binutils-arm-linux-gnueabihf \
@@ -8,7 +8,9 @@ RUN apt-get update && apt-get --no-install-recommends install -y \
   binutils-s390x-linux-gnu \
   binutils-powerpc64le-linux-gnu \
   binutils-mips64el-linux-gnuabi64 \
-  binutils-mips64-linux-gnuabi64
+  binutils-mips64-linux-gnuabi64 \
+  binutils-loongarch64-linux-gnu \
+
 WORKDIR /src
 
 
@@ -52,7 +54,11 @@ FROM base AS exit-mips64
 COPY fixtures/exit.mips64.s .
 RUN mips64-linux-gnuabi64-as --noexecstack -o exit.o exit.mips64.s && mips64-linux-gnuabi64-ld -o exit -s exit.o
 
-FROM golang:1.21-alpine AS generate
+FROM base AS exit-loong64
+COPY fixtures/exit.loongarch64.s .
+RUN loongarch64-linux-gnu-as --noexecstack -o exit.o exit.loongarch64.s && loongarch64-linux-gnu-ld -o exit -s exit.o
+
+FROM golang:1.20-alpine AS generate
 WORKDIR /src
 COPY --from=exit-amd64 /src/exit amd64
 COPY --from=exit-386 /src/exit 386
@@ -64,9 +70,10 @@ COPY --from=exit-ppc64 /src/exit ppc64
 COPY --from=exit-ppc64le /src/exit ppc64le
 COPY --from=exit-mips64le /src/exit mips64le
 COPY --from=exit-mips64 /src/exit mips64
+COPY --from=exit-loong64 /src/exit loong64
 COPY generate.go .
 
-RUN go run generate.go amd64 386 arm64 arm riscv64 s390x ppc64 ppc64le mips64le mips64 && ls -l
+RUN go run generate.go amd64 386 arm64 arm riscv64 s390x ppc64 ppc64le mips64le mips64 loong64 && ls -l
 
 
 FROM scratch

util/archutil/detect.go

@@ -78,6 +78,11 @@ func SupportedPlatforms(noCache bool) []ocispecs.Platform {
 			arr = append(arr, linux(p))
 		}
 	}
+	if p := "loong64"; def.Architecture != p {
+		if _, err := loong64Supported(); err == nil {
+			arr = append(arr, linux(p))
+		}
+	}
 	if p := "arm"; def.Architecture != p {
 		if _, err := armSupported(); err == nil {
 			p := linux("arm")
@@ -144,6 +149,11 @@ func WarnIfUnsupported(pfs []ocispecs.Platform) {
 					printPlatformWarning(p, err)
 				}
 			}
+			if p.Architecture == "loong64" {
+				if _, err := loong64Supported(); err != nil {
+					printPlatformWarning(p, err)
+				}
+			}
 			if p.Architecture == "arm" {
 				if _, err := armSupported(); err != nil {
 					printPlatformWarning(p, err)

util/archutil/fixtures/exit.loongarch64.s

@@ -0,0 +1,6 @@
+	.global _start
+	.text
+_start:
+	li.w $a0,0
+	li.w $a7,93
+	syscall 0

util/archutil/loong64_binary.go

@@ -0,0 +1,9 @@
+//go:build !loong64
+// +build !loong64
+
+package archutil
+
+// This file is generated by running make inside the archutil package.
+// Do not edit manually.
+
+const Binaryloong64 = "\x1f\x8b\x08\x00\x00\x00\x00\x00\x02\xff\xaa\x77\xf5\x71\x63\x62\x64\x64\x80\x01\x26\x06\x08\x6f\x03\x03\x83\x02\x88\x76\x80\x8a\x5f\x80\xd2\xcc\x60\x31\x0b\x06\x26\x06\x07\x06\x66\x06\x26\x06\x90\x1a\x56\x06\x14\xa0\xc0\x88\x44\xef\x81\x0a\xc2\x68\x98\x81\x81\x4f\x4b\x52\xd8\x18\x88\x07\x02\x50\x9a\x85\x41\x94\x81\xbb\xa4\x91\x99\x81\x41\x9b\x81\x41\xaf\x38\xa3\xb8\xa4\xa8\x24\x31\x89\x41\xaf\x24\xb5\xa2\x84\x81\x0a\x80\x9b\x81\x01\xec\x27\x98\xdb\x60\xe1\xb0\x01\xca\xe7\x41\x53\xcf\x88\x85\xcf\x8c\xc5\x5c\x98\xff\x05\x09\xe8\x07\x04\x00\x00\xff\xff\x31\xd2\xf1\xb5\x90\x01\x00\x00"

util/archutil/loong64_check.go

@@ -0,0 +1,8 @@
+//go:build !loong64
+// +build !loong64
+
+package archutil
+
+func loong64Supported() (string, error) {
+	return check("loong64", Binaryloong64)
+}

util/archutil/loong64_check_loong64.go

@@ -0,0 +1,7 @@
+//go:build loong64
+
+package archutil
+
+func loong64Supported() (string, error) {
+	return "", nil
+}