[PATCH v2 4/7] powerpc/build: move .data.rel.ro, .sdata2 to read-only
From: Nicholas Piggin <npiggin@gmail.com>
Date: 2022-09-16 04:11:04
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
.sdata2 is a readonly small data section for ppc32, and .data.rel.ro is data that needs relocating but is read-only after that so these can both be moved to the read only memory region. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> --- arch/powerpc/kernel/vmlinux.lds.S | 20 ++++++++++++-------- 1 file changed, 12 insertions(+), 8 deletions(-)
diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index 16c4389d498d..ae0814063900 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S@@ -131,6 +131,16 @@ SECTIONS /* Read-only data */ RO_DATA(PAGE_SIZE) +#ifdef CONFIG_PPC32 + .sdata2 : AT(ADDR(.sdata2) - LOAD_OFFSET) { + *(.sdata2) + } +#endif + + .data.rel.ro : AT(ADDR(.data.rel.ro) - LOAD_OFFSET) { + *(.data.rel.ro*) + } + .branch_lt : AT(ADDR(.branch_lt) - LOAD_OFFSET) { *(.branch_lt) }
@@ -348,19 +358,13 @@ SECTIONS . = ALIGN(PAGE_SIZE); _sdata = .; -#ifdef CONFIG_PPC32 .data : AT(ADDR(.data) - LOAD_OFFSET) { DATA_DATA *(.data.rel*) +#ifdef CONFIG_PPC32 *(SDATA_MAIN) - *(.sdata2) - } -#else - .data : AT(ADDR(.data) - LOAD_OFFSET) { - DATA_DATA - *(.data.rel*) - } #endif + } /* The initial task and kernel stack */ INIT_TASK_DATA_SECTION(THREAD_ALIGN)
--
2.37.2