113 lines
2.6 KiB
C
113 lines
2.6 KiB
C
#ifndef _LINUX_LINKAGE_H
|
|
#define _LINUX_LINKAGE_H
|
|
|
|
#include <linux/compiler.h>
|
|
#include <linux/stringify.h>
|
|
#include <linux/export.h>
|
|
#include <asm/linkage.h>
|
|
|
|
/* Some toolchains use other characters (e.g. '`') to mark new line in macro */
|
|
#ifndef ASM_NL
|
|
#define ASM_NL ;
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
#define CPP_ASMLINKAGE extern "C"
|
|
#else
|
|
#define CPP_ASMLINKAGE
|
|
#endif
|
|
|
|
#ifndef asmlinkage
|
|
#define asmlinkage CPP_ASMLINKAGE
|
|
#endif
|
|
|
|
#ifndef cond_syscall
|
|
#define cond_syscall(x) asm( \
|
|
".weak " VMLINUX_SYMBOL_STR(x) "\n\t" \
|
|
".set " VMLINUX_SYMBOL_STR(x) "," \
|
|
VMLINUX_SYMBOL_STR(sys_ni_syscall))
|
|
#endif
|
|
|
|
#ifndef SYSCALL_ALIAS
|
|
#define SYSCALL_ALIAS(alias, name) asm( \
|
|
".globl " VMLINUX_SYMBOL_STR(alias) "\n\t" \
|
|
".set " VMLINUX_SYMBOL_STR(alias) "," \
|
|
VMLINUX_SYMBOL_STR(name))
|
|
#endif
|
|
|
|
#define __page_aligned_data __section(.data..page_aligned) __aligned(PAGE_SIZE)
|
|
#define __page_aligned_bss __section(.bss..page_aligned) __aligned(PAGE_SIZE)
|
|
|
|
/*
|
|
* For assembly routines.
|
|
*
|
|
* Note when using these that you must specify the appropriate
|
|
* alignment directives yourself
|
|
*/
|
|
#define __PAGE_ALIGNED_DATA .section ".data..page_aligned", "aw"
|
|
#define __PAGE_ALIGNED_BSS .section ".bss..page_aligned", "aw"
|
|
|
|
/*
|
|
* This is used by architectures to keep arguments on the stack
|
|
* untouched by the compiler by keeping them live until the end.
|
|
* The argument stack may be owned by the assembly-language
|
|
* caller, not the callee, and gcc doesn't always understand
|
|
* that.
|
|
*
|
|
* We have the return value, and a maximum of six arguments.
|
|
*
|
|
* This should always be followed by a "return ret" for the
|
|
* protection to work (ie no more work that the compiler might
|
|
* end up needing stack temporaries for).
|
|
*/
|
|
/* Assembly files may be compiled with -traditional .. */
|
|
#ifndef __ASSEMBLY__
|
|
#ifndef asmlinkage_protect
|
|
# define asmlinkage_protect(n, ret, args...) do { } while (0)
|
|
#endif
|
|
#endif
|
|
|
|
#ifndef __ALIGN
|
|
#define __ALIGN .align 4,0x90
|
|
#define __ALIGN_STR ".align 4,0x90"
|
|
#endif
|
|
|
|
#ifdef __ASSEMBLY__
|
|
|
|
#ifndef LINKER_SCRIPT
|
|
#define ALIGN __ALIGN
|
|
#define ALIGN_STR __ALIGN_STR
|
|
|
|
#ifndef ENTRY
|
|
#define ENTRY(name) \
|
|
.globl name ASM_NL \
|
|
ALIGN ASM_NL \
|
|
name:
|
|
#endif
|
|
#endif /* LINKER_SCRIPT */
|
|
|
|
#ifndef WEAK
|
|
#define WEAK(name) \
|
|
.weak name ASM_NL \
|
|
name:
|
|
#endif
|
|
|
|
#ifndef END
|
|
#define END(name) \
|
|
.size name, .-name
|
|
#endif
|
|
|
|
/* If symbol 'name' is treated as a subroutine (gets called, and returns)
|
|
* then please use ENDPROC to mark 'name' as STT_FUNC for the benefit of
|
|
* static analysis tools such as stack depth analyzer.
|
|
*/
|
|
#ifndef ENDPROC
|
|
#define ENDPROC(name) \
|
|
.type name, @function ASM_NL \
|
|
END(name)
|
|
#endif
|
|
|
|
#endif
|
|
|
|
#endif
|