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authorTejun Heo <tj@kernel.org>2009-07-08 22:27:40 -0400
committerTejun Heo <tj@kernel.org>2009-07-08 22:27:40 -0400
commit023bf6f1b8bf58dc4da7f0dc1cf4787b0d5297c1 (patch)
tree780331cadf207ced67dfcdf36a6479dc0e3d3c04 /arch/um
parent1dcdd0911b5553f0282ce8525773955b59a56919 (diff)
linker script: unify usage of discard definition
Discarded sections in different archs share some commonality but have considerable differences. This led to linker script for each arch implementing its own /DISCARD/ definition, which makes maintaining tedious and adding new entries error-prone. This patch makes all linker scripts to move discard definitions to the end of the linker script and use the common DISCARDS macro. As ld uses the first matching section definition, archs can include default discarded sections by including them earlier in the linker script. ia64 is notable because it first throws away some ia64 specific subsections and then include the rest of the sections into the final image, so those sections must be discarded before the inclusion. defconfig compile tested for x86, x86-64, powerpc, powerpc64, ia64, alpha, sparc, sparc64 and s390. Michal Simek tested microblaze. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Paul Mundt <lethal@linux-sh.org> Acked-by: Mike Frysinger <vapier@gentoo.org> Tested-by: Michal Simek <monstr@monstr.eu> Cc: linux-arch@vger.kernel.org Cc: Michal Simek <monstr@monstr.eu> Cc: microblaze-uclinux@itee.uq.edu.au Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/um')
-rw-r--r--arch/um/include/asm/common.lds.S5
-rw-r--r--arch/um/kernel/dyn.lds.S2
-rw-r--r--arch/um/kernel/uml.lds.S2
3 files changed, 2 insertions, 7 deletions
diff --git a/arch/um/include/asm/common.lds.S b/arch/um/include/asm/common.lds.S
index cb0248616d49..37ecc5577a9a 100644
--- a/arch/um/include/asm/common.lds.S
+++ b/arch/um/include/asm/common.lds.S
@@ -123,8 +123,3 @@
123 __initramfs_end = .; 123 __initramfs_end = .;
124 } 124 }
125 125
126 /* Sections to be discarded */
127 /DISCARD/ : {
128 *(.exitcall.exit)
129 }
130
diff --git a/arch/um/kernel/dyn.lds.S b/arch/um/kernel/dyn.lds.S
index 2916d6eadffd..715a188c0472 100644
--- a/arch/um/kernel/dyn.lds.S
+++ b/arch/um/kernel/dyn.lds.S
@@ -157,5 +157,5 @@ SECTIONS
157 157
158 DWARF_DEBUG 158 DWARF_DEBUG
159 159
160 /DISCARD/ : { *(.discard) } 160 DISCARDS
161} 161}
diff --git a/arch/um/kernel/uml.lds.S b/arch/um/kernel/uml.lds.S
index 1f8a622cabe1..2ebd39765db8 100644
--- a/arch/um/kernel/uml.lds.S
+++ b/arch/um/kernel/uml.lds.S
@@ -101,5 +101,5 @@ SECTIONS
101 101
102 DWARF_DEBUG 102 DWARF_DEBUG
103 103
104 /DISCARD/ : { *(.discard) } 104 DISCARDS
105} 105}