[PATCH] uml: fix CONFIG_STATIC_LINK=y build failure with newer glibc

From: Roland McGrath
Date: Fri Aug 20 2010 - 19:10:32 EST


The following changes since commit 36423a5ed5e4ea95ceedb68fad52965033e11639:

Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip (2010-08-20 14:25:08 -0700)

are available in the git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-roland.git uml/ld-irel

Roland McGrath (1):
uml: fix CONFIG_STATIC_LINK=y build failure with newer glibc

arch/um/kernel/dyn.lds.S | 14 ++++++++++++--
arch/um/kernel/uml.lds.S | 17 +++++++++++++++++
2 files changed, 29 insertions(+), 2 deletions(-)

Thanks,
Roland
---
[PATCH] uml: fix CONFIG_STATIC_LINK=y build failure with newer glibc

With glibc 2.11 or later that was built with --enable-multi-arch,
the UML link fails with undefined references to __rel_iplt_start and
similar symbols. In recent binutils, the default linker script
defines these symbols (see ld --verbose). Fix the UML linker
scripts to match the new defaults for these sections.

Signed-off-by: Roland McGrath <roland@xxxxxxxxxx>
---
arch/um/kernel/dyn.lds.S | 14 ++++++++++++--
arch/um/kernel/uml.lds.S | 17 +++++++++++++++++
2 files changed, 29 insertions(+), 2 deletions(-)

diff --git a/arch/um/kernel/dyn.lds.S b/arch/um/kernel/dyn.lds.S
index 6926801..a3cab6d 100644
--- a/arch/um/kernel/dyn.lds.S
+++ b/arch/um/kernel/dyn.lds.S
@@ -50,8 +50,18 @@ SECTIONS
.rela.got : { *(.rela.got) }
.rel.bss : { *(.rel.bss .rel.bss.* .rel.gnu.linkonce.b.*) }
.rela.bss : { *(.rela.bss .rela.bss.* .rela.gnu.linkonce.b.*) }
- .rel.plt : { *(.rel.plt) }
- .rela.plt : { *(.rela.plt) }
+ .rel.plt : {
+ *(.rel.plt)
+ PROVIDE_HIDDEN(__rel_iplt_start = .);
+ *(.rel.iplt)
+ PROVIDE_HIDDEN(__rel_iplt_end = .);
+ }
+ .rela.plt : {
+ *(.rela.plt)
+ PROVIDE_HIDDEN(__rela_iplt_start = .);
+ *(.rela.iplt)
+ PROVIDE_HIDDEN(__rela_iplt_end = .);
+ }
.init : {
KEEP (*(.init))
} =0x90909090
diff --git a/arch/um/kernel/uml.lds.S b/arch/um/kernel/uml.lds.S
index ec63785..a7cbffb 100644
--- a/arch/um/kernel/uml.lds.S
+++ b/arch/um/kernel/uml.lds.S
@@ -43,6 +43,23 @@ SECTIONS
__syscall_stub_end = .;
}

+ /*
+ * These are needed even in a static link, even if they wind up being empty.
+ * Newer glibc needs these __rel{,a}_iplt_{start,end} symbols.
+ */
+ .rel.plt : {
+ *(.rel.plt)
+ PROVIDE_HIDDEN(__rel_iplt_start = .);
+ *(.rel.iplt)
+ PROVIDE_HIDDEN(__rel_iplt_end = .);
+ }
+ .rela.plt : {
+ *(.rela.plt)
+ PROVIDE_HIDDEN(__rela_iplt_start = .);
+ *(.rela.iplt)
+ PROVIDE_HIDDEN(__rela_iplt_end = .);
+ }
+
#include "asm/common.lds.S"

init.data : { INIT_DATA }
--
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