linux-kernel - [PATCH] tile/vdso: emit a GNU hash as well

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Message-ID: <1438908520-3192-1-git-send-email-cmetcalf@ezchip.com>
Date:	Thu, 6 Aug 2015 20:48:40 -0400
From:	Chris Metcalf <cmetcalf@...hip.com>
To:	Andy Lutomirski <luto@...nel.org>,
	Anton Blanchard <anton@...ba.org>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Richard Kuo <rkuo@...eaurora.org>
CC:	Chris Metcalf <cmetcalf@...hip.com>, X86 ML <x86@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Nathan Lynch <nathan_lynch@...tor.com>,
	Isaac Dunham <ibid.ag@...il.com>,
	Rich Felker <dalias@...c.org>,
	"musl@...ts.openwall.com" <musl@...ts.openwall.com>
Subject: [PATCH] tile/vdso: emit a GNU hash as well

In principle, including the GNU hash can allow libc to avoid
calculating SysV hashes at all.

Signed-off-by: Chris Metcalf <cmetcalf@...hip.com>
---
 arch/tile/kernel/vdso/Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/tile/kernel/vdso/Makefile b/arch/tile/kernel/vdso/Makefile
index a025f63d54cd..c54fff37b5ff 100644
--- a/arch/tile/kernel/vdso/Makefile
+++ b/arch/tile/kernel/vdso/Makefile
@@ -54,7 +54,7 @@ $(obj)/built-in.o: $(obj)/vdso-syms.o
 $(obj)/built-in.o: ld_flags += -R $(obj)/vdso-syms.o
 
 SYSCFLAGS_vdso.so.dbg = -shared -s -Wl,-soname=linux-vdso.so.1 \
-                            $(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
+                            $(call cc-ldoption, -Wl$(comma)--hash-style=both)
 SYSCFLAGS_vdso_syms.o = -r
 $(obj)/vdso-syms.o: $(src)/vdso.lds $(obj)/vrt_sigreturn.o FORCE
 	$(call if_changed,vdsold)
@@ -113,6 +113,6 @@ $(obj)/vrt_sigreturn32.o: $(obj)/vrt_sigreturn.S
 $(obj)/vdso32.o: $(obj)/vdso32.so
 
 SYSCFLAGS_vdso32.so.dbg = -m32 -shared -s -Wl,-soname=linux-vdso32.so.1 \
-			    $(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
+			    $(call cc-ldoption, -Wl$(comma)--hash-style=both)
 $(obj)/vdso32.so.dbg: $(src)/vdso.lds $(obj-vdso32)
 	$(call if_changed,vdsold)
-- 
2.1.2

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