[PATCH 07/17] crypto: dedicated ELF sections for collected crypto initcalls

[Jay Wang]

The addresses of init functions for crypto collected into the standalone
modules are placed into a dedicated ELF section. This is achieved by
introducing a custom linker script crypto/fips140/fips140.lds. Since in
later patch the init crypto will be called in the proper ordering (e.g.,
device_initcall should be earlier than late_initcall), the linker script
allocates different levels of ELF section (e.g.,
__fips140_initcall0_start and __fips140_initcall1_start) to preserve the
proper ordering.

Signed-off-by: Jay Wang <wanjay at amazon.com>
---
 Makefile                   |  2 +-
 crypto/fips140/fips140.lds | 17 +++++++++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)
 create mode 100644 crypto/fips140/fips140.lds

diff --git a/Makefile b/Makefile
index b5ae385ed5f3..8413cc02665c 100644
--- a/Makefile
+++ b/Makefile
@@ -1313,7 +1313,7 @@ crypto/fips140/.fips140.symvers: fips140-ready
 	@:
 modpost: crypto/fips140/.fips140.symvers
 quiet_cmd_ld_fips140 = LD [M]  $@
-      cmd_ld_fips140 = $(LD) -r $(KBUILD_LDFLAGS) $(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) --build-id=none --whole-archive $< --no-whole-archive -o $@
+      cmd_ld_fips140 = $(LD) -r $(KBUILD_LDFLAGS) $(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) --build-id=none -T $(srctree)/crypto/fips140/fips140.lds --whole-archive $< --no-whole-archive -o $@
 
 cmd_fips140_mod = ar -t $< > $@
 
diff --git a/crypto/fips140/fips140.lds b/crypto/fips140/fips140.lds
new file mode 100644
index 000000000000..1adb3ccb5b9d
--- /dev/null
+++ b/crypto/fips140/fips140.lds
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+SECTIONS {
+	.init.data : {
+		__fips140_initcalls_start = .;
+		__fips140_initcall0_start = .;
+		*(.fips_initcall0)
+		__fips140_initcall0_end = .;
+		__fips140_initcall1_start = .;
+		*(.fips_initcall1)
+		__fips140_initcall1_end = .;
+		__fips140_initcall2_start = .;
+		*(.fips_initcall2)
+		__fips140_initcall2_end = .;
+		__fips140_initcalls_end = .;
+	}
+}
\ No newline at end of file
-- 
2.47.3