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5a205a32ff
1. detect whether binutils supports the cfi pseudo ops
2. define conditional macros to generate the ops
3. define new ENTRY_CFI/END_CFI to annotate hand asm code.
- Needed because we don't want to emit dwarf info in general ENTRY/END
used by lowest level trap/exception/interrutp handlers as unwinder
gets confused trying to unwind out of them. We want unwinder to
instead stop when it hits onfo those routines
- These provide minimal start/end cfi ops assuming routine doesn't
touch stack memory/regs
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
64 lines
1.4 KiB
C
64 lines
1.4 KiB
C
/*
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* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __ASM_LINKAGE_H
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#define __ASM_LINKAGE_H
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#include <asm/dwarf.h>
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#ifdef __ASSEMBLY__
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#define ASM_NL ` /* use '`' to mark new line in macro */
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/* annotation for data we want in DCCM - if enabled in .config */
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.macro ARCFP_DATA nm
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#ifdef CONFIG_ARC_HAS_DCCM
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.section .data.arcfp
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#else
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.section .data
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#endif
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.global \nm
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.endm
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/* annotation for data we want in DCCM - if enabled in .config */
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.macro ARCFP_CODE
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#ifdef CONFIG_ARC_HAS_ICCM
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.section .text.arcfp, "ax",@progbits
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#else
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.section .text, "ax",@progbits
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#endif
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.endm
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#define ENTRY_CFI(name) \
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.globl name ASM_NL \
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ALIGN ASM_NL \
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name: ASM_NL \
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CFI_STARTPROC ASM_NL
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#define END_CFI(name) \
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CFI_ENDPROC ASM_NL \
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.size name, .-name
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#else /* !__ASSEMBLY__ */
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#ifdef CONFIG_ARC_HAS_ICCM
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#define __arcfp_code __attribute__((__section__(".text.arcfp")))
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#else
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#define __arcfp_code __attribute__((__section__(".text")))
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#endif
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#ifdef CONFIG_ARC_HAS_DCCM
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#define __arcfp_data __attribute__((__section__(".data.arcfp")))
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#else
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#define __arcfp_data __attribute__((__section__(".data")))
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#endif
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#endif /* __ASSEMBLY__ */
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#endif
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