[PATCH v5 1/2] rust: add zerocopy to bindings and uapi

[Deborah Brouwer]

Make the zerocopy and zerocopy_derive crates available to use when
building the bindings and uapi crates and their tests. Also make the
zerocopy and zerocopy_derive crates available to rust-analyzer when it
runs on the bindings and uapi crates.

This will be used by the Tyr driver that needs the traits IntoBytes and
Immutable to safely copy the struct byte-for-byte to userspace.

Signed-off-by: Deborah Brouwer <deborah.brouwer@xxxxxxxxxxxxx>
---
 rust/Makefile                     | 24 ++++++++++++++++++------
 scripts/generate_rust_analyzer.py |  4 ++--
 2 files changed, 20 insertions(+), 8 deletions(-)

diff --git a/rust/Makefile b/rust/Makefile
index da1a7409d984..a182c0e96974 100644
--- a/rust/Makefile
+++ b/rust/Makefile
@@ -361,12 +361,18 @@ rusttestlib-kernel: $(src)/kernel/lib.rs rusttestlib-bindings rusttestlib-uapi \
     $(obj)/bindings.o rusttestlib-zerocopy rusttestlib-zerocopy_derive FORCE
 	+$(call if_changed,rustc_test_library)
 
-rusttestlib-bindings: private rustc_target_flags = --extern ffi --extern pin_init
-rusttestlib-bindings: $(src)/bindings/lib.rs rusttestlib-ffi rusttestlib-pin_init FORCE
+rusttestlib-bindings: private rustc_target_flags = --extern ffi --extern pin_init \
+    --extern zerocopy=$(objtree)/$(obj)/test/libzerocopy.rlib \
+    --extern zerocopy_derive=$(objtree)/$(obj)/test/$(libzerocopy_derive_name)
+rusttestlib-bindings: $(src)/bindings/lib.rs rusttestlib-ffi rusttestlib-pin_init \
+    rusttestlib-zerocopy rusttestlib-zerocopy_derive FORCE
 	+$(call if_changed,rustc_test_library)
 
-rusttestlib-uapi: private rustc_target_flags = --extern ffi --extern pin_init
-rusttestlib-uapi: $(src)/uapi/lib.rs rusttestlib-ffi rusttestlib-pin_init FORCE
+rusttestlib-uapi: private rustc_target_flags = --extern ffi --extern pin_init \
+    --extern zerocopy=$(objtree)/$(obj)/test/libzerocopy.rlib \
+    --extern zerocopy_derive=$(objtree)/$(obj)/test/$(libzerocopy_derive_name)
+rusttestlib-uapi: $(src)/uapi/lib.rs rusttestlib-ffi rusttestlib-pin_init \
+    rusttestlib-zerocopy rusttestlib-zerocopy_derive FORCE
 	+$(call if_changed,rustc_test_library)
 
 quiet_cmd_rustdoc_test = RUSTDOC T $<
@@ -774,19 +780,25 @@ $(obj)/ffi.o: private skip_gendwarfksyms = 1
 $(obj)/ffi.o: $(src)/ffi.rs $(obj)/compiler_builtins.o FORCE
 	+$(call if_changed_rule,rustc_library)
 
-$(obj)/bindings.o: private rustc_target_flags = --extern ffi --extern pin_init
+$(obj)/bindings.o: private rustc_target_flags = --extern ffi --extern pin_init \
+    --extern zerocopy --extern zerocopy_derive
 $(obj)/bindings.o: $(src)/bindings/lib.rs \
     $(obj)/ffi.o \
     $(obj)/pin_init.o \
+    $(obj)/zerocopy.o \
+    $(obj)/$(libzerocopy_derive_name) \
     $(obj)/bindings/bindings_generated.rs \
     $(obj)/bindings/bindings_helpers_generated.rs FORCE
 	+$(call if_changed_rule,rustc_library)
 
-$(obj)/uapi.o: private rustc_target_flags = --extern ffi --extern pin_init
+$(obj)/uapi.o: private rustc_target_flags = --extern ffi --extern pin_init \
+    --extern zerocopy --extern zerocopy_derive
 $(obj)/uapi.o: private skip_gendwarfksyms = 1
 $(obj)/uapi.o: $(src)/uapi/lib.rs \
     $(obj)/ffi.o \
     $(obj)/pin_init.o \
+    $(obj)/zerocopy.o \
+    $(obj)/$(libzerocopy_derive_name) \
     $(obj)/uapi/uapi_generated.rs FORCE
 	+$(call if_changed_rule,rustc_library)
 
diff --git a/scripts/generate_rust_analyzer.py b/scripts/generate_rust_analyzer.py
index dc1219736f77..6255a81591eb 100755
--- a/scripts/generate_rust_analyzer.py
+++ b/scripts/generate_rust_analyzer.py
@@ -313,8 +313,8 @@ def generate_crates(
         }
         return register_crate(crate_with_generated)
 
-    bindings = append_crate_with_generated("bindings", [core, ffi, pin_init])
-    uapi = append_crate_with_generated("uapi", [core, ffi, pin_init])
+    bindings = append_crate_with_generated("bindings", [core, ffi, pin_init, zerocopy, zerocopy_derive])
+    uapi = append_crate_with_generated("uapi", [core, ffi, pin_init, zerocopy, zerocopy_derive])
     kernel = append_crate_with_generated(
         "kernel", [core, macros, build_error, pin_init, ffi, bindings, uapi, zerocopy, zerocopy_derive]
     )

-- 
2.56.0