Messages in this thread Patch in this message | | | Date | Thu, 24 Apr 2008 11:03:45 -0400 | From | Mathieu Desnoyers <> | Subject | [patch 21/37] Add __discard section to x86 |
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Add a __discard sectionto the linker script. Code produced in this section will not be put in the vmlinux file. This is useful when we have to calculate the size of an instruction before actually declaring it (for alignment purposes for instance). This is used by the immediate values.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Acked-by: H. Peter Anvin <hpa@zytor.com> CC: Andi Kleen <ak@muc.de> CC: Chuck Ebbert <cebbert@redhat.com> CC: Christoph Hellwig <hch@infradead.org> CC: Jeremy Fitzhardinge <jeremy@goop.org> CC: Thomas Gleixner <tglx@linutronix.de> CC: Ingo Molnar <mingo@redhat.com> --- arch/x86/kernel/vmlinux_32.lds.S | 1 + arch/x86/kernel/vmlinux_64.lds.S | 1 + 2 files changed, 2 insertions(+)
Index: linux-2.6-sched-devel/arch/x86/kernel/vmlinux_32.lds.S =================================================================== --- linux-2.6-sched-devel.orig/arch/x86/kernel/vmlinux_32.lds.S 2008-04-22 20:04:02.000000000 -0400 +++ linux-2.6-sched-devel/arch/x86/kernel/vmlinux_32.lds.S 2008-04-22 20:33:15.000000000 -0400 @@ -213,6 +213,7 @@ SECTIONS /* Sections to be discarded */ /DISCARD/ : { *(.exitcall.exit) + *(__discard) } STABS_DEBUG Index: linux-2.6-sched-devel/arch/x86/kernel/vmlinux_64.lds.S =================================================================== --- linux-2.6-sched-devel.orig/arch/x86/kernel/vmlinux_64.lds.S 2008-04-22 20:04:02.000000000 -0400 +++ linux-2.6-sched-devel/arch/x86/kernel/vmlinux_64.lds.S 2008-04-22 20:33:15.000000000 -0400 @@ -246,6 +246,7 @@ SECTIONS /DISCARD/ : { *(.exitcall.exit) *(.eh_frame) + *(__discard) } STABS_DEBUG -- Mathieu Desnoyers Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
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