132 lines
3.3 KiB
C
132 lines
3.3 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef PERF_LINUX_LINKAGE_H_
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#define PERF_LINUX_LINKAGE_H_
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/* linkage.h ... for including arch/x86/lib/memcpy_64.S */
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/* Some toolchains use other characters (e.g. '`') to mark new line in macro */
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#ifndef ASM_NL
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#define ASM_NL ;
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#endif
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#ifndef __ALIGN
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#define __ALIGN .align 4,0x90
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#define __ALIGN_STR ".align 4,0x90"
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#endif
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/* SYM_T_FUNC -- type used by assembler to mark functions */
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#ifndef SYM_T_FUNC
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#define SYM_T_FUNC STT_FUNC
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#endif
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/* SYM_A_* -- align the symbol? */
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#define SYM_A_ALIGN ALIGN
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/* SYM_L_* -- linkage of symbols */
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#define SYM_L_GLOBAL(name) .globl name
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#define SYM_L_WEAK(name) .weak name
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#define SYM_L_LOCAL(name) /* nothing */
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#define ALIGN __ALIGN
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/* === generic annotations === */
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/* SYM_ENTRY -- use only if you have to for non-paired symbols */
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#ifndef SYM_ENTRY
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#define SYM_ENTRY(name, linkage, align...) \
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linkage(name) ASM_NL \
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align ASM_NL \
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name:
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#endif
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/* SYM_START -- use only if you have to */
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#ifndef SYM_START
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#define SYM_START(name, linkage, align...) \
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SYM_ENTRY(name, linkage, align)
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#endif
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/* SYM_END -- use only if you have to */
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#ifndef SYM_END
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#define SYM_END(name, sym_type) \
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.type name sym_type ASM_NL \
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.set .L__sym_size_##name, .-name ASM_NL \
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.size name, .-name
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#endif
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/* SYM_ALIAS -- use only if you have to */
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#ifndef SYM_ALIAS
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#define SYM_ALIAS(alias, name, sym_type, linkage) \
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linkage(alias) ASM_NL \
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.set alias, name ASM_NL \
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.type alias sym_type ASM_NL \
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.set .L__sym_size_##alias, .L__sym_size_##name ASM_NL \
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.size alias, .L__sym_size_##alias
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#endif
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/* SYM_FUNC_START -- use for global functions */
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#ifndef SYM_FUNC_START
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#define SYM_FUNC_START(name) \
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SYM_START(name, SYM_L_GLOBAL, SYM_A_ALIGN)
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#endif
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/* SYM_FUNC_START_LOCAL -- use for local functions */
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#ifndef SYM_FUNC_START_LOCAL
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#define SYM_FUNC_START_LOCAL(name) \
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SYM_START(name, SYM_L_LOCAL, SYM_A_ALIGN)
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#endif
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/* SYM_FUNC_START_WEAK -- use for weak functions */
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#ifndef SYM_FUNC_START_WEAK
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#define SYM_FUNC_START_WEAK(name) \
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SYM_START(name, SYM_L_WEAK, SYM_A_ALIGN)
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#endif
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/*
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* SYM_FUNC_END -- the end of SYM_FUNC_START_LOCAL, SYM_FUNC_START,
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* SYM_FUNC_START_WEAK, ...
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*/
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#ifndef SYM_FUNC_END
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#define SYM_FUNC_END(name) \
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SYM_END(name, SYM_T_FUNC)
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#endif
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/*
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* SYM_FUNC_ALIAS -- define a global alias for an existing function
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*/
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#ifndef SYM_FUNC_ALIAS
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#define SYM_FUNC_ALIAS(alias, name) \
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SYM_ALIAS(alias, name, SYM_T_FUNC, SYM_L_GLOBAL)
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#endif
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/*
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* SYM_FUNC_ALIAS_LOCAL -- define a local alias for an existing function
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*/
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#ifndef SYM_FUNC_ALIAS_LOCAL
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#define SYM_FUNC_ALIAS_LOCAL(alias, name) \
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SYM_ALIAS(alias, name, SYM_T_FUNC, SYM_L_LOCAL)
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#endif
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/*
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* SYM_FUNC_ALIAS_WEAK -- define a weak global alias for an existing function
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*/
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#ifndef SYM_FUNC_ALIAS_WEAK
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#define SYM_FUNC_ALIAS_WEAK(alias, name) \
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SYM_ALIAS(alias, name, SYM_T_FUNC, SYM_L_WEAK)
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#endif
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// In the kernel sources (include/linux/cfi_types.h), this has a different
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// definition when CONFIG_CFI_CLANG is used, for tools/ just use the !clang
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// definition:
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#ifndef SYM_TYPED_START
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#define SYM_TYPED_START(name, linkage, align...) \
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SYM_START(name, linkage, align)
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#endif
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#ifndef SYM_TYPED_FUNC_START
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#define SYM_TYPED_FUNC_START(name) \
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SYM_TYPED_START(name, SYM_L_GLOBAL, SYM_A_ALIGN)
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#endif
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#endif /* PERF_LINUX_LINKAGE_H_ */
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