From: wcohen@redhat.com (William Cohen)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] Eliminate the .eh_frame sections from the aarch64 vmlinux and kernel modules
Date: Thu, 21 Jan 2016 22:56:26 -0500 [thread overview]
Message-ID: <1453434986-19307-1-git-send-email-wcohen@redhat.com> (raw)
By default the aarch64 gcc generates .eh_frame sections. Unlike
.debug_frame sections, the .eh_frame sections are loaded into memory
when the associated code is loaded. On an example kernel being built
with this default the .eh_frame section in vmlinux used an extra 1.7MB
of memory. The x86 disables the creation of the .eh_frame section.
The aarch64 should probably do the same to save some memory.
Signed-off-by: William Cohen <wcohen@redhat.com>
---
arch/arm64/Makefile | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index cd822d8..094a137 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -27,6 +27,7 @@ $(warning LSE atomics not supported by binutils)
endif
KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr)
+KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
KBUILD_AFLAGS += $(lseinstr)
ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
--
2.5.0
next reply other threads:[~2016-01-22 3:56 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-22 3:56 William Cohen [this message]
2016-01-22 7:41 ` [PATCH] Eliminate the .eh_frame sections from the aarch64 vmlinux and kernel modules Ard Biesheuvel
2016-01-22 14:43 ` William Cohen
2016-01-22 15:02 ` Mark Rutland
2016-01-22 15:36 ` William Cohen
2016-01-22 17:02 ` Mark Rutland
2016-01-22 19:03 ` William Cohen
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