Commit 214b9a83 authored by Peter Zijlstra's avatar Peter Zijlstra
Browse files

x86/ibt,crypto: Add ENDBR for the jump-table entries 



The code does:

	## branch into array
	mov     jump_table(,%rax,8), %bufp
	JMP_NOSPEC bufp

resulting in needing to mark the jump-table entries with ENDBR.

Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: default avatarJosh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/20220308154318.110500806@infradead.org
parent c3b03791

arch/x86/crypto/crc32c-pcl-intel-asm_64.S

+3 −0
Original line number Diff line number Diff line
@@ -195,6 +195,7 @@ crc_array: 
.altmacro

LABEL crc_ %i

.noaltmacro

	ENDBR

	crc32q   -i*8(block_0), crc_init

	crc32q   -i*8(block_1), crc1

	crc32q   -i*8(block_2), crc2
@@ -204,6 +205,7 @@ LABEL crc_ %i 
.altmacro

LABEL crc_ %i

.noaltmacro

	ENDBR

	crc32q   -i*8(block_0), crc_init

	crc32q   -i*8(block_1), crc1

# SKIP  crc32  -i*8(block_2), crc2 ; Don't do this one yet
@@ -237,6 +239,7 @@ LABEL crc_ %i 
	################################################################



LABEL crc_ 0

	ENDBR

	mov     tmp, len

	cmp     $128*24, tmp

	jae     full_block