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