fe7cacc1c2
To increase the usefulness of reliable stack unwinding, this adds CFI unwind annotations to many low-level i386 routines. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
#ifndef _DWARF2_H
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#define _DWARF2_H
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#include <linux/config.h>
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#ifndef __ASSEMBLY__
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#warning "asm/dwarf2.h should be only included in pure assembly files"
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#endif
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/*
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Macros for dwarf2 CFI unwind table entries.
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See "as.info" for details on these pseudo ops. Unfortunately
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they are only supported in very new binutils, so define them
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away for older version.
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*/
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#ifdef CONFIG_UNWIND_INFO
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#define CFI_STARTPROC .cfi_startproc
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#define CFI_ENDPROC .cfi_endproc
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#define CFI_DEF_CFA .cfi_def_cfa
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#define CFI_DEF_CFA_REGISTER .cfi_def_cfa_register
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#define CFI_DEF_CFA_OFFSET .cfi_def_cfa_offset
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#define CFI_ADJUST_CFA_OFFSET .cfi_adjust_cfa_offset
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#define CFI_OFFSET .cfi_offset
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#define CFI_REL_OFFSET .cfi_rel_offset
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#define CFI_REGISTER .cfi_register
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#define CFI_RESTORE .cfi_restore
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#define CFI_REMEMBER_STATE .cfi_remember_state
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#define CFI_RESTORE_STATE .cfi_restore_state
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#else
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/* Due to the structure of pre-exisiting code, don't use assembler line
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comment character # to ignore the arguments. Instead, use a dummy macro. */
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.macro ignore a=0, b=0, c=0, d=0
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.endm
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#define CFI_STARTPROC ignore
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#define CFI_ENDPROC ignore
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#define CFI_DEF_CFA ignore
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#define CFI_DEF_CFA_REGISTER ignore
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#define CFI_DEF_CFA_OFFSET ignore
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#define CFI_ADJUST_CFA_OFFSET ignore
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#define CFI_OFFSET ignore
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#define CFI_REL_OFFSET ignore
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#define CFI_REGISTER ignore
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#define CFI_RESTORE ignore
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#define CFI_REMEMBER_STATE ignore
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#define CFI_RESTORE_STATE ignore
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#endif
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#endif
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