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2011-09-28x86-64: Fix CFI data for interrupt framesJan Beulich
The patch titled "x86: Don't use frame pointer to save old stack on irq entry" did not properly adjust CFI directives, so this patch is a follow-up to that one. With the old stack pointer no longer stored in a callee-saved register (plus some offset), we now have to use a CFA expression to describe the memory location where it is being found. This requires the use of .cfi_escape (allowing arbitrary byte streams to be emitted into .eh_frame), as there is no .cfi_def_cfa_expression (which also cannot reasonably be expected, as it would require a full expression parser). Signed-off-by: Jan Beulich <jbeulich@suse.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Link: http://lkml.kernel.org/r/4E8360200200007800058467@nat28.tlf.novell.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-09-03x86: Use {push,pop}{l,q}_cfi in more placesJan Beulich
... plus additionally introduce {push,pop}f{l,q}_cfi. All in the hope that the code becomes better readable this way (it gets quite a bit smaller in any case). Signed-off-by: Jan Beulich <jbeulich@novell.com> Acked-by: Alexander van Heukelum <heukelum@fastmail.fm> LKML-Reference: <4C7FBDA40200007800013FAF@vpn.id2.novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-05-14x86: Use .cfi_sections for assembly codeRoland McGrath
The newer assemblers support the .cfi_sections directive so we can put the CFI from .S files into the .debug_frame section that is preserved in unstripped vmlinux and in separate debuginfo, rather than the .eh_frame section that is now discarded by vmlinux.lds.S. Signed-off-by: Roland McGrath <roland@redhat.com> LKML-Reference: <20100514044303.A6FE7400BE@magilla.sf.frob.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-08-31x86, asm: Add 32-bit versions of the combined CFI macrosH. Peter Anvin
Add 32-bit versions of the combined CFI macros, equivalent to the 64-bit ones except, obviously, operating on 32-bit stack words. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-11-23x86: move dwarf2 related macro to dwarf2.hCyrill Gorcunov
Impact: cleanup Move recently introduced dwarf2 macros to dwarf2.h file. It allow us to not duplicate them in assembly files. Active usage of _cfi macros don't make assembly files more obvious to understand but we already have a lot of macros there which requires to search the definitions of them *anyway*. But at least it make every cfi usage one line shorter. Also some code alignment is done. Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-23x86: Fix ASM_X86__ header guardsH. Peter Anvin
Change header guards named "ASM_X86__*" to "_ASM_X86_*" since: a. the double underscore is ugly and pointless. b. no leading underscore violates namespace constraints. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-10-23x86, um: ... and asm-x86 moveAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: H. Peter Anvin <hpa@zytor.com>