Initial import

1 files changed, 112 insertions, 0 deletions

diff --git a/include/linux/linkage.h b/include/linux/linkage.h
new file mode 100644
index 000000000..a6a42dd02
--- /dev/null
+++ b/include/linux/linkage.h
@@ -0,0 +1,112 @@
+#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