[TEST v2 1/1] [WIP] Try compile linux on macOS with the help of nix

From: jw910731 <[email protected]>

Signed-off-by: Wen-Yuan Wu <[email protected]>
---
 flake.lock                       | 82 ++++++++++++++++++++++++++++++++
 flake.nix                        | 43 +++++++++++++++++
 scripts/Kconfig.include          |  2 +-
 scripts/install.sh               |  2 +-
 scripts/macos-include/byteswap.h |  4 ++
 scripts/macos-include/elf.h      | 24 ++++++++++
 scripts/macos-include/endian.h   |  8 ++++
 scripts/mod/file2alias.c         |  3 ++
 usr/gen_init_cpio.c              |  4 +-
 9 files changed, 168 insertions(+), 4 deletions(-)
 create mode 100644 flake.lock
 create mode 100644 flake.nix
 create mode 100644 scripts/macos-include/byteswap.h
 create mode 100644 scripts/macos-include/elf.h
 create mode 100644 scripts/macos-include/endian.h

diff --git a/flake.lock b/flake.lock
new file mode 100644
index 000000000..e6c1f5f67
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,82 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1772963539,
+        "narHash": "sha256-9jVDGZnvCckTGdYT53d/EfznygLskyLQXYwJLKMPsZs=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "9dcb002ca1690658be4a04645215baea8b95f31d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs",
+        "rust-overlay": "rust-overlay",
+        "utils": "utils"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1773115373,
+        "narHash": "sha256-bfK9FJFcQth6f3ydYggS5m0z2NRGF/PY6Y2XgZDJ6pg=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "1924b4672a2b8e4aee6e6652ec2e59a8d3c5648e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 000000000..b2199f6eb
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,43 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    utils.url = "github:numtide/flake-utils";
+    rust-overlay = {
+      url = "github:oxalica/rust-overlay";
+      inputs = {
+        nixpkgs.follows = "nixpkgs";
+      };
+    };
+  };
+  outputs = { self, nixpkgs, utils, rust-overlay }: utils.lib.eachDefaultSystem (system:
+    let
+      overlays = [ (import rust-overlay) ];
+      pkgs = import nixpkgs {
+        inherit system overlays;
+      };
+      pkgsCross = pkgs.pkgsCross.aarch64-multiplatform;
+    in
+    {
+      devShell = pkgsCross.mkShell {
+        nativeBuildInputs = with pkgsCross; [
+          gnumake
+          ncurses
+          flex
+          bison
+          lld
+          rustc 
+          rust-bindgen
+          rustfmt
+          clippy
+          pahole
+        ];
+        buildInputs = [];
+        HOSTCC="${pkgs.lib.getBin pkgs.clang}/bin/clang";
+        HOSTLD="${pkgs.lib.getBin pkgs.lld}/bin/lld";
+        HOSTCFLAGS="-I${pkgs.lib.getLib pkgs.libelf}/include -Iscripts/macos-include";
+        NIX_CFLAGS_COMPILE="-march=armv8-a+crypto";
+        RUST_LIB_SRC = "${pkgsCross.rust.packages.stable.rustPlatform.rustLibSrc}";
+      };
+    }
+  );
+}
\ No newline at end of file
diff --git a/scripts/Kconfig.include b/scripts/Kconfig.include
index 33193ca6e..c3f38006c 100644
--- a/scripts/Kconfig.include
+++ b/scripts/Kconfig.include
@@ -54,7 +54,7 @@ as-version := $(shell,set -- $(as-info) && echo $2)
 
 # Get the linker name, version, and error out if it is not supported.
 ld-info := $(shell,$(srctree)/scripts/ld-version.sh $(LD))
-$(error-if,$(success,test -z "$(ld-info)"),Sorry$(comma) this linker is not supported.)
+$(error-if,$(success,test -z "$(ld-info)"),Sorry$(comma) this linker $(LD) is not supported.)
 ld-name := $(shell,set -- $(ld-info) && echo $1)
 ld-version := $(shell,set -- $(ld-info) && echo $2)
 
diff --git a/scripts/install.sh b/scripts/install.sh
index 05d62ac51..b99183bb8 100755
--- a/scripts/install.sh
+++ b/scripts/install.sh
@@ -6,7 +6,7 @@
 # Adapted from code in arch/i386/boot/Makefile by H. Peter Anvin
 # Common code factored out by Masahiro Yamada
 
-set -e
+set -xe
 
 # Make sure the files actually exist
 for file in "${KBUILD_IMAGE}" System.map
diff --git a/scripts/macos-include/byteswap.h b/scripts/macos-include/byteswap.h
new file mode 100644
index 000000000..fd97ed5e1
--- /dev/null
+++ b/scripts/macos-include/byteswap.h
@@ -0,0 +1,4 @@
+#pragma once
+#define bswap_16 __builtin_bswap16
+#define bswap_32 __builtin_bswap32
+#define bswap_64 __builtin_bswap64
diff --git a/scripts/macos-include/elf.h b/scripts/macos-include/elf.h
new file mode 100644
index 000000000..5d42ed858
--- /dev/null
+++ b/scripts/macos-include/elf.h
@@ -0,0 +1,24 @@
+#pragma once
+#include <libelf/gelf.h>
+
+#define STT_SPARC_REGISTER 3
+#define R_386_32 1
+#define R_386_PC32 2
+#define R_MIPS_HI16 5
+#define R_MIPS_LO16 6
+#define R_MIPS_26 4
+#define R_MIPS_32 2
+#define R_ARM_ABS32 2
+#define R_ARM_REL32 3
+#define R_ARM_PC24 1
+#define R_ARM_CALL 28
+#define R_ARM_JUMP24 29
+#define R_ARM_THM_JUMP24 30
+#define R_ARM_THM_PC22 10
+#define R_ARM_MOVW_ABS_NC 43
+#define R_ARM_MOVT_ABS 44
+#define R_ARM_THM_MOVW_ABS_NC 47
+#define R_ARM_THM_MOVT_ABS 48
+#define R_ARM_THM_JUMP19 51
+#define R_AARCH64_ABS64 257
+#define R_AARCH64_PREL64 260
diff --git a/scripts/macos-include/endian.h b/scripts/macos-include/endian.h
new file mode 100644
index 000000000..6a27c4a0b
--- /dev/null
+++ b/scripts/macos-include/endian.h
@@ -0,0 +1,8 @@
+#pragma once
+#include <machine/endian.h>
+#include <libkern/OSByteOrder.h>
+
+#define le16toh(x) OSSwapLittleToHostInt16(x)
+#define le32toh(x) OSSwapLittleToHostInt32(x)
+#define le64toh(x) OSSwapLittleToHostInt64(x)
+#define EM_AARCH64 183
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index 4e99393a3..98aee9a4d 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -16,7 +16,10 @@
 #include "list.h"
 #include "xalloc.h"
 
+#define _UUID_T
+#define uuid_t int
 #include "modpost.h"
+#undef uuid_t
 #include "devicetable-offsets.h"
 
 /* We use the ELF typedefs for kernel_ulong_t but bite the bullet and
diff --git a/usr/gen_init_cpio.c b/usr/gen_init_cpio.c
index b7296edc6..809602912 100644
--- a/usr/gen_init_cpio.c
+++ b/usr/gen_init_cpio.c
@@ -457,7 +457,7 @@ static int cpio_mkfile(const char *name, const char *location,
 			goto error;
 
 		if (size) {
-			this_read = copy_file_range(file, NULL, outfd, NULL, size, 0);
+			// this_read = copy_file_range(file, NULL, outfd, NULL, size, 0);
 			if (this_read > 0) {
 				if (this_read > size)
 					goto error;
@@ -674,7 +674,7 @@ int main (int argc, char *argv[])
 			break;
 		case 'o':
 			outfd = open(optarg,
-				     O_WRONLY | O_CREAT | O_LARGEFILE | O_TRUNC,
+				     O_WRONLY | O_CREAT | O_TRUNC,
 				     0600);
 			if (outfd < 0) {
 				fprintf(stderr, "failed to open %s\n", optarg);
-- 
2.51.2