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[1/4] powerpc/64: place sfpr section explicitly with the linker script

Message ID 20161129043942.13848-2-npiggin@gmail.com (mailing list archive)
State Superseded
Headers show

Commit Message

Nicholas Piggin Nov. 29, 2016, 4:39 a.m. UTC 
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
 arch/powerpc/kernel/vmlinux.lds.S | 8 ++++++++
 1 file changed, 8 insertions(+)
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Patch

diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index 861f4e1..f710d15 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -93,6 +93,14 @@  SECTIONS
 		KPROBES_TEXT
 		IRQENTRY_TEXT
 		SOFTIRQENTRY_TEXT
+		/*
+		 * -Os builds call FP save/restore functions. The powerpc64
+		 * linker generates those on demand in the .sfpr section.
+		 * .sfpr gets placed at the beginning of a group of input
+		 * sections, which can break start-of-text offset if it is
+		 * included with the main text sections, so put it by itself.
+		 */
+		*(.sfpr);
 		MEM_KEEP(init.text)
 		MEM_KEEP(exit.text)