Since some P6 .asm files uses a trick to implment jump tables with LEA,
prepend X86_NOTRACK to "jmp *%reg" to disable indirect branch tracking
when Intel CET is enabled.
* mpn/x86/p6/aors_n.asm: Prepend X86_NOTRACK to "jmp *%reg".
* mpn/x86/p6/aorsmul_1.asm: Likewise.
* mpn/x86/p6/lshsub_n.asm: Likewise.
* mpn/x86/p6/mul_basecase.asm: Likewise.
* mpn/x86/p6/sqr_basecase.asm: Likewise.
---
mpn/x86/p6/aors_n.asm | 2 +-
mpn/x86/p6/aorsmul_1.asm | 2 +-
mpn/x86/p6/lshsub_n.asm | 2 +-
mpn/x86/p6/mul_basecase.asm | 2 +-
mpn/x86/p6/sqr_basecase.asm | 2 +-
5 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/mpn/x86/p6/aors_n.asm b/mpn/x86/p6/aors_n.asm
index b4a32150f..ab172df7e 100644
--- a/mpn/x86/p6/aors_n.asm
+++ b/mpn/x86/p6/aors_n.asm
@@ -90,7 +90,7 @@ L(here):
')
shr %edx C set cy flag
- jmp *%eax
+ X86_NOTRACK jmp *%eax
ifdef(`PIC',`
L(pic_calc):
diff --git a/mpn/x86/p6/aorsmul_1.asm b/mpn/x86/p6/aorsmul_1.asm
index d6bc549e3..2a3b122ee 100644
--- a/mpn/x86/p6/aorsmul_1.asm
+++ b/mpn/x86/p6/aorsmul_1.asm
@@ -240,7 +240,7 @@ L(here):
cmovnz( %ebx, %ecx) C high,low carry other way around
cmovnz( %eax, %ebx)
- jmp *%edx
+ X86_NOTRACK jmp *%edx
ifdef(`PIC',`
diff --git a/mpn/x86/p6/lshsub_n.asm b/mpn/x86/p6/lshsub_n.asm
index 2ceb98bd8..17db5d5e0 100644
--- a/mpn/x86/p6/lshsub_n.asm
+++ b/mpn/x86/p6/lshsub_n.asm
@@ -82,7 +82,7 @@ L(here):
pxor %mm1, %mm1
pxor %mm0, %mm0
- jmp *%eax
+ X86_NOTRACK jmp *%eax
ifdef(`PIC',`
L(pic_calc):
diff --git a/mpn/x86/p6/mul_basecase.asm b/mpn/x86/p6/mul_basecase.asm
index 03ae0d6b2..521b31e01 100644
--- a/mpn/x86/p6/mul_basecase.asm
+++ b/mpn/x86/p6/mul_basecase.asm
@@ -524,7 +524,7 @@ L(unroll_outer_entry):
xorl %eax, %ebx C carries other way for odd index
xorl %eax, %ecx
- jmp *%edx
+ X86_NOTRACK jmp *%edx
C -----------------------------------------------------------------------------
diff --git a/mpn/x86/p6/sqr_basecase.asm b/mpn/x86/p6/sqr_basecase.asm
index ca29e8084..f71304f39 100644
--- a/mpn/x86/p6/sqr_basecase.asm
+++ b/mpn/x86/p6/sqr_basecase.asm
@@ -447,7 +447,7 @@
define(cmovX,`ifelse(eval(UNROLL_COUNT%2),1,`cmovz($@)',`cmovnz($@)')')
cmovX( %ebx, %ecx) C high carry reverse
cmovX( %eax, %ebx) C low carry reverse
movl %edx, VAR_JMP
- jmp *%edx
+ X86_NOTRACK jmp *%edx
C Must be on an even address here so the low bit of the jump address
--
2.24.1
_______________________________________________
gmp-devel mailing list
gmp-devel@gmplib.org
https://gmplib.org/mailman/listinfo/gmp-devel
