system/freebsd-src
system/freebsd-src
1
0
Fork 0
mirror of https://github.com/freebsd/freebsd-src synced 2024-07-21 18:27:22 +00:00
Code Issues Actions 2 Packages Projects Releases Wiki Activity

Rename skein_block_asm.s to .S and assemble using Clang IAS

Browse source 
Comparing the object files produced by GNU as 2.17.50 and Clang IAS
shows many immaterial changes in strtab etc., and one material change
in .text:

   1bac:  4c 8b 4f 18             mov    0x18(%rdi),%r9
   1bb0:  eb 0e                   jmp    1bc0 <Skein1024_block_loop>
-  1bb2:  66 66 2e 0f 1f 84 00    data16 nopw %cs:0x0(%rax,%rax,1)
-  1bb9:  00 00 00 00
-  1bbd:  0f 1f 00                nopl   (%rax)
+  1bb2:  66 2e 0f 1f 84 00 00    nopw   %cs:0x0(%rax,%rax,1)
+  1bb9:  00 00 00
+  1bbc:  0f 1f 40 00             nopl   0x0(%rax)

 0000000000001bc0 <Skein1024_block_loop>:
 Skein1024_block_loop():
   1bc0:  4c 8b 47 10             mov    0x10(%rdi),%r8
   1bc4:  4c 03 85 c0 00 00 00    add    0xc0(%rbp),%r8

That is, GNU as and Clang's integrated assembler use different multi-
byte NOPs for alignment (GNU as emits an 11 byte NOP + a 3 byte NOP,
while Clang IAS emits a 10 byte NOP + a 4 byte NOP).

Dependency cleanup hacks are not required, because we do not create
.depend files from GNU as.

Reviewed by:	allanjude, arichardson, cem, tsoome
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D8434
This commit is contained in:
Ed Maste 2020-06-06 00:35:41 +00:00
parent c2ea3d44bf
commit 24ed6f550a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=361853
3 changed files with 7 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
lib/libmd/Makefile
View file

@ -116,18 +116,15 @@ CFLAGS+= -DSHA1_ASM
SRCS+= rmd160.S
CFLAGS+= -DRMD160_ASM
.endif
.if exists(${MACHINE_ARCH}/skein_block_asm.s)
.if defined(XAS) || ${MK_BINUTILS_BOOTSTRAP} != "no"
AFLAGS += --strip-local-absolute
.if exists(${MACHINE_ARCH}/skein_block_asm.S)
# Fully unroll all loops in the assembly optimized version
AFLAGS+= --defsym SKEIN_LOOP=0 --defsym SKEIN_USE_ASM=1792
SRCS+= skein_block_asm.s
ACFLAGS+= -DSKEIN_LOOP=0
SRCS+= skein_block_asm.S
CFLAGS+= -DSKEIN_ASM -DSKEIN_USE_ASM=1792 # list of block functions to replace with assembly: 256+512+1024 = 1792
.else
.warning as not available: not using optimized Skein asm
.endif
.endif
.if exists(${MACHINE_ARCH}/sha.S) || exists(${MACHINE_ARCH}/rmd160.S) || exists(${MACHINE_ARCH}/skein_block_asm.s)
.if exists(${MACHINE_ARCH}/sha.S) || exists(${MACHINE_ARCH}/rmd160.S) || exists(${MACHINE_ARCH}/skein_block_asm.S)
ACFLAGS+= -DELF -Wa,--noexecstack
.endif
.endif # ${USE_ASM_SOURCES} != 0

0
sys/crypto/skein/amd64/skein_block_asm.s → sys/crypto/skein/amd64/skein_block_asm.S
View file

6
sys/modules/crypto/Makefile
View file

@ -28,13 +28,13 @@ SRCS += sha1.c sha256c.c sha512c.c
SRCS += skein.c skein_block.c
# unroll the 256 and 512 loops, half unroll the 1024
CFLAGS.skein_block.c += -DSKEIN_LOOP=995
.if exists(${MACHINE_ARCH}/skein_block_asm.s)
.if exists(${MACHINE_ARCH}/skein_block_asm.S)
.PATH: ${SRCTOP}/sys/crypto/skein/${MACHINE_ARCH}
SRCS += skein_block_asm.s
SRCS += skein_block_asm.S
CFLAGS += -DSKEIN_ASM -DSKEIN_USE_ASM=1792 # list of block functions to replace with assembly: 256+512+1024 = 1792
ACFLAGS += -DELF -Wa,--noexecstack
# Fully unroll all loops in the assembly optimized version
AFLAGS+= --defsym SKEIN_LOOP=0 --defsym SKEIN_USE_ASM=1792
ACFLAGS += -DSKEIN_LOOP=0
.endif
SRCS += siphash.c
SRCS += gmac.c gfmult.c