mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 07:45:06 +07:00
ad697a1aec
Declaring a global symbol in assembly is tedious, error-prone, and
painful to read. While ENTRY() exists, this is supposed to be used for
function entry points, and this affects alignment in a potentially
undesireable manner.
Instead, let's add a generic GLOBAL() macro for this, as x86 added
locally in commit:
95695547a7 ("x86: asm linkage - introduce GLOBAL macro")
... thus allowing us to use this more freely in the kernel.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: AKASHI Takahiro <takahiro.akashi@linaro.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Torsten Duwe <duwe@suse.de>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
121 lines
2.7 KiB
C
121 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_LINKAGE_H
|
|
#define _LINUX_LINKAGE_H
|
|
|
|
#include <linux/compiler_types.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 " __stringify(x) "\n\t" \
|
|
".set " __stringify(x) "," \
|
|
__stringify(sys_ni_syscall))
|
|
#endif
|
|
|
|
#ifndef SYSCALL_ALIAS
|
|
#define SYSCALL_ALIAS(alias, name) asm( \
|
|
".globl " __stringify(alias) "\n\t" \
|
|
".set " __stringify(alias) "," \
|
|
__stringify(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 GLOBAL
|
|
#define GLOBAL(name) \
|
|
.globl name ASM_NL \
|
|
name:
|
|
#endif
|
|
|
|
#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 \
|
|
ALIGN 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
|