cregit-Linux how code gets into the kernel

Release 4.14 arch/x86/include/asm/dwarf2.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_DWARF2_H

#define _ASM_X86_DWARF2_H

#ifndef __ASSEMBLY__
#warning "asm/dwarf2.h should be only included in pure assembly files"
#endif

/*
 * Macros for dwarf2 CFI unwind table entries.
 * See "as.info" for details on these pseudo ops. Unfortunately
 * they are only supported in very new binutils, so define them
 * away for older version.
 */

#ifdef CONFIG_AS_CFI


#define CFI_STARTPROC		.cfi_startproc

#define CFI_ENDPROC		.cfi_endproc

#define CFI_DEF_CFA		.cfi_def_cfa

#define CFI_DEF_CFA_REGISTER	.cfi_def_cfa_register

#define CFI_DEF_CFA_OFFSET	.cfi_def_cfa_offset

#define CFI_ADJUST_CFA_OFFSET	.cfi_adjust_cfa_offset

#define CFI_OFFSET		.cfi_offset

#define CFI_REL_OFFSET		.cfi_rel_offset

#define CFI_REGISTER		.cfi_register

#define CFI_RESTORE		.cfi_restore

#define CFI_REMEMBER_STATE	.cfi_remember_state

#define CFI_RESTORE_STATE	.cfi_restore_state

#define CFI_UNDEFINED		.cfi_undefined

#define CFI_ESCAPE		.cfi_escape

#ifdef CONFIG_AS_CFI_SIGNAL_FRAME

#define CFI_SIGNAL_FRAME	.cfi_signal_frame
#else

#define CFI_SIGNAL_FRAME
#endif

#if defined(CONFIG_AS_CFI_SECTIONS) && defined(__ASSEMBLY__)
#ifndef BUILD_VDSO
	/*
         * Emit CFI data in .debug_frame sections, not .eh_frame sections.
         * The latter we currently just discard since we don't do DWARF
         * unwinding at runtime.  So only the offline DWARF information is
         * useful to anyone.  Note we should not use this directive if
         * vmlinux.lds.S gets changed so it doesn't discard .eh_frame.
         */
	.cfi_sections .debug_frame
#else
	 /*
          * For the vDSO, emit both runtime unwind information and debug
          * symbols for the .dbg file.
          */
	.cfi_sections .eh_frame, .debug_frame
#endif
#endif

#else

/*
 * Due to the structure of pre-exisiting code, don't use assembler line
 * comment character # to ignore the arguments. Instead, use a dummy macro.
 */
.macro cfi_ignore a=0, b=0, c=0, d=0
.endm

#define CFI_STARTPROC		cfi_ignore
#define CFI_ENDPROC		cfi_ignore
#define CFI_DEF_CFA		cfi_ignore
#define CFI_DEF_CFA_REGISTER	cfi_ignore
#define CFI_DEF_CFA_OFFSET	cfi_ignore
#define CFI_ADJUST_CFA_OFFSET	cfi_ignore
#define CFI_OFFSET		cfi_ignore
#define CFI_REL_OFFSET		cfi_ignore
#define CFI_REGISTER		cfi_ignore
#define CFI_RESTORE		cfi_ignore
#define CFI_REMEMBER_STATE	cfi_ignore
#define CFI_RESTORE_STATE	cfi_ignore
#define CFI_UNDEFINED		cfi_ignore
#define CFI_ESCAPE		cfi_ignore
#define CFI_SIGNAL_FRAME	cfi_ignore

#endif

#endif /* _ASM_X86_DWARF2_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
Andrew Lutomirski20999.52%266.67%
Greg Kroah-Hartman10.48%133.33%
Total210100.00%3100.00%
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