tyler.durden
/
audk
mirror of https://github.com/acidanthera/audk.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

ArmPkg: introduce ASM_FUNC, MOV32/MOV64 and ADRL/LDRL macros 

This introduces the ASM_FUNC() macro to annotate function entry points
in assembler files. This allows us to add additional metadata that
marks a function entry point as a function, and allows us to emit
a .section directive for each function, which makes it possible for
the linker to drop unreferenced code.

In addition, introduce a couple of utility macros that we can use to
clean up the code.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Eugene Cohen <eugene@hp.com>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
This commit is contained in:
Ard Biesheuvel 2016-08-10 11:43:50 +02:00
parent 66edb631f8
commit d2d0e27c76
2 changed files with 42 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
ArmPkg/Include/AsmMacroIoLib.h
View File

@ -3,6 +3,7 @@
Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR> Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
Copyright (c) 2011-2012, ARM Ltd. All rights reserved.<BR> Copyright (c) 2011-2012, ARM Ltd. All rights reserved.<BR>
Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>
This program and the accompanying materials This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License are licensed and made available under the terms and conditions of the BSD License
@ -51,4 +52,26 @@
#endif #endif
#define _ASM_FUNC(Name, Section) \
.global Name ; \
.section #Section, "ax" ; \
.type Name, %function ; \
Name:
#define ASM_FUNC(Name) _ASM_FUNC(ASM_PFX(Name), .text. ## Name)
#define MOV32(Reg, Val) \
movw Reg, #(Val) & 0xffff ; \
movt Reg, #(Val) >> 16
#define ADRL(Reg, Sym) \
movw Reg, #:lower16:(Sym) - (. + 16) ; \
movt Reg, #:upper16:(Sym) - (. + 12) ; \
add Reg, Reg, pc
#define LDRL(Reg, Sym) \
movw Reg, #:lower16:(Sym) - (. + 16) ; \
movt Reg, #:upper16:(Sym) - (. + 12) ; \
ldr Reg, [pc, Reg]
#endif #endif

20
ArmPkg/Include/AsmMacroIoLibV8.h
View File

@ -3,6 +3,7 @@
Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR> Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
Portions copyright (c) 2011 - 2014, ARM Ltd. All rights reserved.<BR> Portions copyright (c) 2011 - 2014, ARM Ltd. All rights reserved.<BR>
Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>
This program and the accompanying materials This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License are licensed and made available under the terms and conditions of the BSD License
@ -71,5 +72,22 @@
#endif // __GNUC__ #endif // __GNUC__
#endif // __MACRO_IO_LIBV8_H__ #define _ASM_FUNC(Name, Section) \
.global Name ; \
.section #Section, "ax" ; \
.type Name, %function ; \
Name:
#define ASM_FUNC(Name) _ASM_FUNC(ASM_PFX(Name), .text. ## Name)
#define MOV32(Reg, Val) \
movz Reg, (Val) >> 16, lsl #16 ; \
movk Reg, (Val) & 0xffff
#define MOV64(Reg, Val) \
movz Reg, (Val) >> 48, lsl #48 ; \
movk Reg, ((Val) >> 32) & 0xffff, lsl #32 ; \
movk Reg, ((Val) >> 16) & 0xffff, lsl #16 ; \
movk Reg, (Val) & 0xffff
#endif // __MACRO_IO_LIBV8_H__