vmlinux.lds.h: Work around Clang issue when targeting PCuABI

CHERI/Morello Clang needlessly places data in the RELRO section in the presence of capabilities. No such section is expected in linker scripts, causing issues at link-time and/or runtime. While waiting for Clang to become more conservative about its use of RELRO data, work around the issue by placing .data.rel.ro together with .rodata, which is appropriate for the kernel. CHERI-LLVM issue: CTSRD-CHERI/llvm-project#673 Signed-off-by: Kevin Brodsky <[email protected]>
stephensmalley · Jan 8, 2024 · 9e5485f · 9e5485f
1 parent 4d876ca
commit 9e5485f
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
@@ -455,6 +455,7 @@
 	.rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {		\
 		__start_rodata = .;					\
 		*(.rodata) *(.rodata.*)					\
+		*(.data.rel.ro)						\
 		SCHED_DATA						\
 		RO_AFTER_INIT_DATA	/* Read only after init */	\
 		. = ALIGN(8);						\