lkml.org 
[lkml]   [2018]   [Feb]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH tip-pti 1/2] x86/entry: remove SAVE_C_REGS_EXCEPT_* macros
The macros which save all but specific registers have been unused for
a long time. Remove them and the SAVE_C_REGS_HELPER macro, but
instead provide the SAVE_C_REGS macro directly.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

diff --git a/arch/x86/entry/calling.h b/arch/x86/entry/calling.h
index f4b129d4af42..75a237c95ff7 100644
--- a/arch/x86/entry/calling.h
+++ b/arch/x86/entry/calling.h
@@ -101,41 +101,18 @@ For 32-bit we have the following conventions - kernel is built with
addq $-(15*8), %rsp
.endm

- .macro SAVE_C_REGS_HELPER offset=0 rax=1 rcx=1 r8910=1 r11=1
- .if \r11
+ .macro SAVE_C_REGS offset=0
movq %r11, 6*8+\offset(%rsp)
- .endif
- .if \r8910
movq %r10, 7*8+\offset(%rsp)
movq %r9, 8*8+\offset(%rsp)
movq %r8, 9*8+\offset(%rsp)
- .endif
- .if \rax
movq %rax, 10*8+\offset(%rsp)
- .endif
- .if \rcx
movq %rcx, 11*8+\offset(%rsp)
- .endif
movq %rdx, 12*8+\offset(%rsp)
movq %rsi, 13*8+\offset(%rsp)
movq %rdi, 14*8+\offset(%rsp)
UNWIND_HINT_REGS offset=\offset extra=0
.endm
- .macro SAVE_C_REGS offset=0
- SAVE_C_REGS_HELPER \offset, 1, 1, 1, 1
- .endm
- .macro SAVE_C_REGS_EXCEPT_RAX_RCX offset=0
- SAVE_C_REGS_HELPER \offset, 0, 0, 1, 1
- .endm
- .macro SAVE_C_REGS_EXCEPT_R891011
- SAVE_C_REGS_HELPER 0, 1, 1, 0, 0
- .endm
- .macro SAVE_C_REGS_EXCEPT_RCX_R891011
- SAVE_C_REGS_HELPER 0, 1, 0, 0, 0
- .endm
- .macro SAVE_C_REGS_EXCEPT_RAX_RCX_R11
- SAVE_C_REGS_HELPER 0, 0, 0, 1, 0
- .endm

.macro SAVE_EXTRA_REGS offset=0
movq %r15, 0*8+\offset(%rsp)
\
 
 \ /
  Last update: 2018-02-06 22:34    [W:0.119 / U:0.712 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site