From c1669e1c205dc8e695fb0c10a655f434e758b9f7 Mon Sep 17 00:00:00 2001
From: Andy Polyakov <appro@openssl.org>
Date: Fri, 7 Nov 2014 22:48:22 +0100
Subject: [PATCH] Remove inconsistency in ARM support. This facilitates
 "universal" builds, ones that target multiple architectures, e.g. ARMv5
 through ARMv7. See commentary in Configure for details.

Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
---
 Configure                          |  30 ++++++-
 crypto/aes/asm/aesv8-armx.pl       |   8 +-
 crypto/aes/asm/bsaes-armv7.pl      |   8 +-
 crypto/arm_arch.h                  |  12 +++
 crypto/armcap.c                    |   7 +-
 crypto/armv4cpuid.S                | 140 ++++++++++++++---------------
 crypto/bn/asm/armv4-gf2m.pl        | 128 +++++++++++++-------------
 crypto/bn/asm/armv4-mont.pl        |   9 +-
 crypto/evp/e_aes.c                 |   2 +-
 crypto/modes/asm/ghash-armv4.pl    |   3 +-
 crypto/modes/gcm128.c              |   2 +-
 crypto/sha/asm/sha1-armv4-large.pl |  11 ++-
 crypto/sha/asm/sha256-armv4.pl     |  11 ++-
 crypto/sha/asm/sha512-armv4.pl     |  11 ++-
 14 files changed, 223 insertions(+), 159 deletions(-)

diff --git a/Configure b/Configure
index 5c4a4600d4..6246822eb0 100755
--- a/Configure
+++ b/Configure
@@ -350,8 +350,34 @@ my %table=(
 # throw in -D[BL]_ENDIAN, whichever appropriate...
 "linux-generic32","gcc:-DTERMIO -O3 -fomit-frame-pointer -Wall::-D_REENTRANT::-ldl:BN_LLONG RC4_CHAR RC4_CHUNK DES_INT DES_UNROLL BF_PTR:${no_asm}:dlfcn:linux-shared:-fPIC::.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
 "linux-ppc",	"gcc:-DB_ENDIAN -DTERMIO -O3 -Wall::-D_REENTRANT::-ldl:BN_LLONG RC4_CHAR RC4_CHUNK DES_RISC1 DES_UNROLL:${ppc32_asm}:linux32:dlfcn:linux-shared:-fPIC::.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
-# It's believed that majority of ARM toolchains predefine appropriate -march.
-# If you compiler does not, do complement config command line with one!
+
+#######################################################################
+# Note that -march is not among compiler options in below linux-armv4
+# target line. Not specifying one is intentional to give you choice to:
+#
+# a) rely on your compiler default by not specifying one;
+# b) specify your target platform explicitly for optimal performance,
+#    e.g. -march=armv6 or -march=armv7-a;
+# c) build "universal" binary that targets *range* of platforms by
+#    specifying minimum and maximum supported architecture;
+#
+# As for c) option. It actually makes no sense to specify maximum to be
+# less than ARMv7, because it's the least requirement for run-time
+# switch between platform-specific code paths. And without run-time
+# switch performance would be equivalent to one for minimum. Secondly,
+# there are some natural limitations that you'd have to accept and
+# respect. Most notably you can *not* build "universal" binary for
+# big-endian platform. This is because ARMv7 processor always picks
+# instructions in little-endian order. Another similar limitation is
+# that -mthumb can't "cross" -march=armv6t2 boundary, because that's
+# where it became Thumb-2. Well, this limitation is a bit artificial,
+# because it's not really impossible, but it's deemed too tricky to
+# support. And of course you have to be sure that your binutils are
+# actually up to the task of handling maximum target platform. With all
+# this in mind here is an example of how to configure "universal" build:
+#
+#       ./Configure linux-armv4 -march=armv6 -D__ARM_MAX_ARCH__=8
+#
 "linux-armv4",	"gcc:-DTERMIO -O3 -Wall::-D_REENTRANT::-ldl:BN_LLONG RC4_CHAR RC4_CHUNK DES_INT DES_UNROLL BF_PTR:${armv4_asm}:dlfcn:linux-shared:-fPIC::.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
 "linux-aarch64","gcc:-DTERMIO -O3 -Wall::-D_REENTRANT::-ldl:SIXTY_FOUR_BIT_LONG RC4_CHAR RC4_CHUNK DES_INT DES_UNROLL BF_PTR:${aarch64_asm}:linux64:dlfcn:linux-shared:-fPIC::.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
 # Configure script adds minimally required -march for assembly support,
diff --git a/crypto/aes/asm/aesv8-armx.pl b/crypto/aes/asm/aesv8-armx.pl
index 923c7f62d5..1e93f86852 100755
--- a/crypto/aes/asm/aesv8-armx.pl
+++ b/crypto/aes/asm/aesv8-armx.pl
@@ -35,11 +35,13 @@ $prefix="aes_v8";
 $code=<<___;
 #include "arm_arch.h"
 
-#if __ARM_ARCH__>=7
+#if __ARM_MAX_ARCH__>=7
 .text
 ___
-$code.=".arch	armv8-a+crypto\n"	if ($flavour =~ /64/);
-$code.=".fpu	neon\n.code	32\n"	if ($flavour !~ /64/);
+$code.=".arch	armv8-a+crypto\n"			if ($flavour =~ /64/);
+$code.=".arch	armv7-a\n.fpu	neon\n.code	32\n"	if ($flavour !~ /64/);
+		#^^^^^^ this is done to simplify adoption by not depending
+		#	on latest binutils.
 
 # Assembler mnemonics are an eclectic mix of 32- and 64-bit syntax,
 # NEON is mostly 32-bit mnemonics, integer - mostly 64. Goal is to
diff --git a/crypto/aes/asm/bsaes-armv7.pl b/crypto/aes/asm/bsaes-armv7.pl
index f3d96d9325..fcc81d1a49 100644
--- a/crypto/aes/asm/bsaes-armv7.pl
+++ b/crypto/aes/asm/bsaes-armv7.pl
@@ -702,13 +702,17 @@ $code.=<<___;
 # define BSAES_ASM_EXTENDED_KEY
 # define XTS_CHAIN_TWEAK
 # define __ARM_ARCH__ __LINUX_ARM_ARCH__
+# define __ARM_MAX_ARCH__ __LINUX_ARM_ARCH__
 #endif
 
 #ifdef __thumb__
 # define adrl adr
 #endif
 
-#if __ARM_ARCH__>=7
+#if __ARM_MAX_ARCH__>=7
+.arch	armv7-a
+.fpu	neon
+
 .text
 .syntax	unified 	@ ARMv7-capable assembler is expected to handle this
 #ifdef __thumb2__
@@ -717,8 +721,6 @@ $code.=<<___;
 .code   32
 #endif
 
-.fpu	neon
-
 .type	_bsaes_decrypt8,%function
 .align	4
 _bsaes_decrypt8:
diff --git a/crypto/arm_arch.h b/crypto/arm_arch.h
index d406c8c229..9a125d878b 100644
--- a/crypto/arm_arch.h
+++ b/crypto/arm_arch.h
@@ -48,6 +48,18 @@
 # endif
 #endif
 
+#if !defined(__ARM_MAX_ARCH__)
+# define __ARM_MAX_ARCH__ __ARM_ARCH__
+#endif
+
+#if __ARM_MAX_ARCH__<__ARM_ARCH__
+# error "__ARM_MAX_ARCH__ can't be less than __ARM_ARCH__"
+#elif __ARM_MAX_ARCH__!=__ARM_ARCH__
+# if __ARM_ARCH__<7 && __ARM_MAX_ARCH__>=7 && defined(__ARMEB__)
+#  error "can't build universal big-endian binary"
+# endif
+#endif
+
 #if !__ASSEMBLER__
 extern unsigned int OPENSSL_armcap_P;
 #endif
diff --git a/crypto/armcap.c b/crypto/armcap.c
index 7e46d07a32..24f7a0829a 100644
--- a/crypto/armcap.c
+++ b/crypto/armcap.c
@@ -7,8 +7,12 @@
 
 #include "arm_arch.h"
 
-unsigned int OPENSSL_armcap_P;
+unsigned int OPENSSL_armcap_P=0;
 
+#if __ARM_MAX_ARCH__<7
+void OPENSSL_cpuid_setup(void) {}
+unsigned long OPENSSL_rdtsc(void) { return 0; }
+#else
 static sigset_t all_masked;
 
 static sigjmp_buf ill_jmp;
@@ -155,3 +159,4 @@ void OPENSSL_cpuid_setup(void)
 	sigaction (SIGILL,&ill_oact,NULL);
 	sigprocmask(SIG_SETMASK,&oset,NULL);
 	}
+#endif
diff --git a/crypto/armv4cpuid.S b/crypto/armv4cpuid.S
index 0059311303..65010ae4fe 100644
--- a/crypto/armv4cpuid.S
+++ b/crypto/armv4cpuid.S
@@ -3,69 +3,6 @@
 .text
 .code	32
 
-@ Special note about using .byte directives to encode instructions.
-@ Initial reason for hand-coding instructions was to allow module to
-@ be compilable by legacy tool-chains. At later point it was pointed
-@ out that since ARMv7, instructions are always encoded in little-endian
-@ order, therefore one has to opt for endian-neutral presentation.
-@ Contemporary tool-chains offer .inst directive for this purpose,
-@ but not legacy ones. Therefore .byte. But there is an exception,
-@ namely ARMv7-R profile still allows for big-endian encoding even for
-@ instructions. This raises the question what if probe instructions
-@ appear executable to such processor operating in big-endian order?
-@ They have to be chosen in a way that avoids this problem. As failed
-@ NEON probe disables a number of other probes we have to ensure that
-@ only NEON probe instruction doesn't appear executable in big-endian
-@ order, therefore 'vorr q8,q8,q8', and not some other register. The
-@ only probe that is not bypassed on failed NEON probe is _armv7_tick,
-@ where you'll spot 'mov r0,r6' that serves this purpose. Basic idea is
-@ that if fetched in alternative byte oder instruction should crash to
-@ denote lack of probed capability...
-
-.align	5
-.global	_armv7_neon_probe
-.type	_armv7_neon_probe,%function
-_armv7_neon_probe:
-	.byte	0xf0,0x01,0x60,0xf2	@ vorr	q8,q8,q8
-	.byte	0x1e,0xff,0x2f,0xe1	@ bx	lr
-.size	_armv7_neon_probe,.-_armv7_neon_probe
-
-.global	_armv7_tick
-.type	_armv7_tick,%function
-_armv7_tick:
-	.byte	0x06,0x00,0xa0,0xe1	@ mov	r0,r6
-	.byte	0x1e,0x0f,0x51,0xec	@ mrrc	p15,1,r0,r1,c14	@ CNTVCT
-	.byte	0x1e,0xff,0x2f,0xe1	@ bx	lr
-	nop
-.size	_armv7_tick,.-_armv7_tick
-
-.global	_armv8_aes_probe
-.type	_armv8_aes_probe,%function
-_armv8_aes_probe:
-	.byte	0x00,0x03,0xb0,0xf3	@ aese.8	q0,q0
-	.byte	0x1e,0xff,0x2f,0xe1	@ bx	lr
-.size	_armv8_aes_probe,.-_armv8_aes_probe
-
-.global	_armv8_sha1_probe
-.type	_armv8_sha1_probe,%function
-_armv8_sha1_probe:
-	.byte	0x40,0x0c,0x00,0xf2	@ sha1c.32	q0,q0,q0
-	.byte	0x1e,0xff,0x2f,0xe1	@ bx	lr
-.size	_armv8_sha1_probe,.-_armv8_sha1_probe
-
-.global	_armv8_sha256_probe
-.type	_armv8_sha256_probe,%function
-_armv8_sha256_probe:
-	.byte	0x40,0x0c,0x00,0xf3	@ sha256h.32	q0,q0,q0
-	.byte	0x1e,0xff,0x2f,0xe1	@ bx lr
-.size	_armv8_sha256_probe,.-_armv8_sha256_probe
-.global	_armv8_pmull_probe
-.type	_armv8_pmull_probe,%function
-_armv8_pmull_probe:
-	.byte	0x00,0x0e,0xa0,0xf2	@ vmull.p64	q0,d0,d0
-	.byte	0x1e,0xff,0x2f,0xe1	@ bx	lr
-.size	_armv8_pmull_probe,.-_armv8_pmull_probe
-
 .align	5
 .global	OPENSSL_atomic_add
 .type	OPENSSL_atomic_add,%function
@@ -139,30 +76,81 @@ OPENSSL_cleanse:
 #endif
 .size	OPENSSL_cleanse,.-OPENSSL_cleanse
 
+#if __ARM_MAX_ARCH__>=7
+.arch	armv7-a
+.fpu	neon
+
+.align	5
+.global	_armv7_neon_probe
+.type	_armv7_neon_probe,%function
+_armv7_neon_probe:
+	vorr	q0,q0,q0
+	bx	lr
+.size	_armv7_neon_probe,.-_armv7_neon_probe
+
+.global	_armv7_tick
+.type	_armv7_tick,%function
+_armv7_tick:
+	mrrc	p15,1,r0,r1,c14		@ CNTVCT
+	bx	lr
+.size	_armv7_tick,.-_armv7_tick
+
+.global	_armv8_aes_probe
+.type	_armv8_aes_probe,%function
+_armv8_aes_probe:
+	.byte	0x00,0x03,0xb0,0xf3	@ aese.8	q0,q0
+	bx	lr
+.size	_armv8_aes_probe,.-_armv8_aes_probe
+
+.global	_armv8_sha1_probe
+.type	_armv8_sha1_probe,%function
+_armv8_sha1_probe:
+	.byte	0x40,0x0c,0x00,0xf2	@ sha1c.32	q0,q0,q0
+	bx	lr
+.size	_armv8_sha1_probe,.-_armv8_sha1_probe
+
+.global	_armv8_sha256_probe
+.type	_armv8_sha256_probe,%function
+_armv8_sha256_probe:
+	.byte	0x40,0x0c,0x00,0xf3	@ sha256h.32	q0,q0,q0
+	bx	lr
+.size	_armv8_sha256_probe,.-_armv8_sha256_probe
+.global	_armv8_pmull_probe
+.type	_armv8_pmull_probe,%function
+_armv8_pmull_probe:
+	.byte	0x00,0x0e,0xa0,0xf2	@ vmull.p64	q0,d0,d0
+	bx	lr
+.size	_armv8_pmull_probe,.-_armv8_pmull_probe
+#endif
+
 .global	OPENSSL_wipe_cpu
 .type	OPENSSL_wipe_cpu,%function
 OPENSSL_wipe_cpu:
+#if __ARM_MAX_ARCH__>=7
 	ldr	r0,.LOPENSSL_armcap
 	adr	r1,.LOPENSSL_armcap
 	ldr	r0,[r1,r0]
+#endif
 	eor	r2,r2,r2
 	eor	r3,r3,r3
 	eor	ip,ip,ip
+#if __ARM_MAX_ARCH__>=7
 	tst	r0,#1
 	beq	.Lwipe_done
-	.byte	0x50,0x01,0x00,0xf3	@ veor	q0, q0, q0
-	.byte	0x52,0x21,0x02,0xf3	@ veor	q1, q1, q1
-	.byte	0x54,0x41,0x04,0xf3	@ veor	q2, q2, q2
-	.byte	0x56,0x61,0x06,0xf3	@ veor	q3, q3, q3
-	.byte	0xf0,0x01,0x40,0xf3	@ veor	q8, q8, q8
-	.byte	0xf2,0x21,0x42,0xf3	@ veor	q9, q9, q9
-	.byte	0xf4,0x41,0x44,0xf3	@ veor	q10, q10, q10
-	.byte	0xf6,0x61,0x46,0xf3	@ veor	q11, q11, q11
-	.byte	0xf8,0x81,0x48,0xf3	@ veor	q12, q12, q12
-	.byte	0xfa,0xa1,0x4a,0xf3	@ veor	q13, q13, q13
-	.byte	0xfc,0xc1,0x4c,0xf3	@ veor	q14, q14, q14
-	.byte	0xfe,0xe1,0x4e,0xf3	@ veor	q14, q14, q14
+	veor	q0, q0, q0
+	veor	q1, q1, q1
+	veor	q2, q2, q2
+	veor	q3, q3, q3
+	veor	q8, q8, q8
+	veor	q9, q9, q9
+	veor	q10, q10, q10
+	veor	q11, q11, q11
+	veor	q12, q12, q12
+	veor	q13, q13, q13
+	veor	q14, q14, q14
+	veor	q15, q15, q15
 .Lwipe_done:
+#endif
 	mov	r0,sp
 #if __ARM_ARCH__>=5
 	bx	lr
@@ -200,8 +188,10 @@ OPENSSL_instrument_bus2:
 .size	OPENSSL_instrument_bus2,.-OPENSSL_instrument_bus2
 
 .align	5
+#if __ARM_MAX_ARCH__>=7
 .LOPENSSL_armcap:
 .word	OPENSSL_armcap_P-.LOPENSSL_armcap
+#endif
 #if __ARM_ARCH__>=6
 .align	5
 #else
diff --git a/crypto/bn/asm/armv4-gf2m.pl b/crypto/bn/asm/armv4-gf2m.pl
index b781afbf89..8f529c95cf 100644
--- a/crypto/bn/asm/armv4-gf2m.pl
+++ b/crypto/bn/asm/armv4-gf2m.pl
@@ -40,10 +40,6 @@ $code=<<___;
 
 .text
 .code	32
-
-#if __ARM_ARCH__>=7
-.fpu	neon
-#endif
 ___
 ################
 # private interface to mul_1x1_ialu
@@ -142,20 +138,80 @@ ___
 #	BN_ULONG a1,BN_ULONG a0,
 #	BN_ULONG b1,BN_ULONG b0);	# r[3..0]=a1a0·b1b0
 {
-my ($r,$t0,$t1,$t2,$t3)=map("q$_",(0..3,8..12));
-my ($a,$b,$k48,$k32,$k16)=map("d$_",(26..31));
-
 $code.=<<___;
 .global	bn_GF2m_mul_2x2
 .type	bn_GF2m_mul_2x2,%function
 .align	5
 bn_GF2m_mul_2x2:
-#if __ARM_ARCH__>=7
+#if __ARM_MAX_ARCH__>=7
 	ldr	r12,.LOPENSSL_armcap
 .Lpic:	ldr	r12,[pc,r12]
 	tst	r12,#1
-	beq	.Lialu
+	bne	.LNEON
+#endif
+___
+$ret="r10";	# reassigned 1st argument
+$code.=<<___;
+	stmdb	sp!,{r4-r10,lr}
+	mov	$ret,r0			@ reassign 1st argument
+	mov	$b,r3			@ $b=b1
+	ldr	r3,[sp,#32]		@ load b0
+	mov	$mask,#7<<2
+	sub	sp,sp,#32		@ allocate tab[8]
+
+	bl	mul_1x1_ialu		@ a1·b1
+	str	$lo,[$ret,#8]
+	str	$hi,[$ret,#12]
+
+	eor	$b,$b,r3		@ flip b0 and b1
+	 eor	$a,$a,r2		@ flip a0 and a1
+	eor	r3,r3,$b
+	 eor	r2,r2,$a
+	eor	$b,$b,r3
+	 eor	$a,$a,r2
+	bl	mul_1x1_ialu		@ a0·b0
+	str	$lo,[$ret]
+	str	$hi,[$ret,#4]
 
+	eor	$a,$a,r2
+	eor	$b,$b,r3
+	bl	mul_1x1_ialu		@ (a1+a0)·(b1+b0)
+___
+@r=map("r$_",(6..9));
+$code.=<<___;
+	ldmia	$ret,{@r[0]-@r[3]}
+	eor	$lo,$lo,$hi
+	eor	$hi,$hi,@r[1]
+	eor	$lo,$lo,@r[0]
+	eor	$hi,$hi,@r[2]
+	eor	$lo,$lo,@r[3]
+	eor	$hi,$hi,@r[3]
+	str	$hi,[$ret,#8]
+	eor	$lo,$lo,$hi
+	add	sp,sp,#32		@ destroy tab[8]
+	str	$lo,[$ret,#4]
+
+#if __ARM_ARCH__>=5
+	ldmia	sp!,{r4-r10,pc}
+#else
+	ldmia	sp!,{r4-r10,lr}
+	tst	lr,#1
+	moveq	pc,lr			@ be binary compatible with V4, yet
+	bx	lr			@ interoperable with Thumb ISA:-)
+#endif
+___
+}
+{
+my ($r,$t0,$t1,$t2,$t3)=map("q$_",(0..3,8..12));
+my ($a,$b,$k48,$k32,$k16)=map("d$_",(26..31));
+
+$code.=<<___;
+#if __ARM_MAX_ARCH__>=7
+.arch	armv7-a
+.fpu	neon
+
+.align	5
+.LNEON:
 	ldr		r12, [sp]		@ 5th argument
 	vmov.32		$a, r2, r1
 	vmov.32		$b, r12, r3
@@ -203,62 +259,12 @@ bn_GF2m_mul_2x2:
 
 	vst1.32		{$r}, [r0]
 	ret		@ bx lr
-.align	4
-.Lialu:
 #endif
 ___
 }
-$ret="r10";	# reassigned 1st argument
 $code.=<<___;
-	stmdb	sp!,{r4-r10,lr}
-	mov	$ret,r0			@ reassign 1st argument
-	mov	$b,r3			@ $b=b1
-	ldr	r3,[sp,#32]		@ load b0
-	mov	$mask,#7<<2
-	sub	sp,sp,#32		@ allocate tab[8]
-
-	bl	mul_1x1_ialu		@ a1·b1
-	str	$lo,[$ret,#8]
-	str	$hi,[$ret,#12]
-
-	eor	$b,$b,r3		@ flip b0 and b1
-	 eor	$a,$a,r2		@ flip a0 and a1
-	eor	r3,r3,$b
-	 eor	r2,r2,$a
-	eor	$b,$b,r3
-	 eor	$a,$a,r2
-	bl	mul_1x1_ialu		@ a0·b0
-	str	$lo,[$ret]
-	str	$hi,[$ret,#4]
-
-	eor	$a,$a,r2
-	eor	$b,$b,r3
-	bl	mul_1x1_ialu		@ (a1+a0)·(b1+b0)
-___
-@r=map("r$_",(6..9));
-$code.=<<___;
-	ldmia	$ret,{@r[0]-@r[3]}
-	eor	$lo,$lo,$hi
-	eor	$hi,$hi,@r[1]
-	eor	$lo,$lo,@r[0]
-	eor	$hi,$hi,@r[2]
-	eor	$lo,$lo,@r[3]
-	eor	$hi,$hi,@r[3]
-	str	$hi,[$ret,#8]
-	eor	$lo,$lo,$hi
-	add	sp,sp,#32		@ destroy tab[8]
-	str	$lo,[$ret,#4]
-
-#if __ARM_ARCH__>=5
-	ldmia	sp!,{r4-r10,pc}
-#else
-	ldmia	sp!,{r4-r10,lr}
-	tst	lr,#1
-	moveq	pc,lr			@ be binary compatible with V4, yet
-	bx	lr			@ interoperable with Thumb ISA:-)
-#endif
 .size	bn_GF2m_mul_2x2,.-bn_GF2m_mul_2x2
-#if __ARM_ARCH__>=7
+#if __ARM_MAX_ARCH__>=7
 .align	5
 .LOPENSSL_armcap:
 .word	OPENSSL_armcap_P-(.Lpic+8)
@@ -266,7 +272,9 @@ $code.=<<___;
 .asciz	"GF(2^m) Multiplication for ARMv4/NEON, CRYPTOGAMS by <appro\@openssl.org>"
 .align	5
 
+#if __ARM_MAX_ARCH__>=7
 .comm	OPENSSL_armcap_P,4,4
+#endif
 ___
 
 foreach (split("\n",$code)) {
diff --git a/crypto/bn/asm/armv4-mont.pl b/crypto/bn/asm/armv4-mont.pl
index 72bad8e308..1d330e9f8a 100644
--- a/crypto/bn/asm/armv4-mont.pl
+++ b/crypto/bn/asm/armv4-mont.pl
@@ -72,7 +72,7 @@ $code=<<___;
 .text
 .code	32
 
-#if __ARM_ARCH__>=7
+#if __ARM_MAX_ARCH__>=7
 .align	5
 .LOPENSSL_armcap:
 .word	OPENSSL_armcap_P-bn_mul_mont
@@ -85,7 +85,7 @@ $code=<<___;
 bn_mul_mont:
 	ldr	ip,[sp,#4]		@ load num
 	stmdb	sp!,{r0,r2}		@ sp points at argument block
-#if __ARM_ARCH__>=7
+#if __ARM_MAX_ARCH__>=7
 	tst	ip,#7
 	bne	.Lialu
 	adr	r0,bn_mul_mont
@@ -256,7 +256,8 @@ my ($rptr,$aptr,$bptr,$nptr,$n0,$num)=map("r$_",(0..5));
 my ($tinptr,$toutptr,$inner,$outer)=map("r$_",(6..9));
 
 $code.=<<___;
-#if __ARM_ARCH__>=7
+#if __ARM_MAX_ARCH__>=7
+.arch	armv7-a
 .fpu	neon
 
 .type	bn_mul8x_mont_neon,%function
@@ -663,7 +664,7 @@ ___
 $code.=<<___;
 .asciz	"Montgomery multiplication for ARMv4/NEON, CRYPTOGAMS by <appro\@openssl.org>"
 .align	2
-#if __ARM_ARCH__>=7
+#if __ARM_MAX_ARCH__>=7
 .comm	OPENSSL_armcap_P,4,4
 #endif
 ___
diff --git a/crypto/evp/e_aes.c b/crypto/evp/e_aes.c
index ba3d43b9fa..ddd856ec71 100644
--- a/crypto/evp/e_aes.c
+++ b/crypto/evp/e_aes.c
@@ -1036,7 +1036,7 @@ const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \
 
 #if defined(OPENSSL_CPUID_OBJ) && (defined(__arm__) || defined(__arm) || defined(__aarch64__))
 #include "arm_arch.h"
-#if __ARM_ARCH__>=7
+#if __ARM_MAX_ARCH__>=7
 # if defined(BSAES_ASM)
 #  define BSAES_CAPABLE	(OPENSSL_armcap_P & ARMV7_NEON)
 # endif
diff --git a/crypto/modes/asm/ghash-armv4.pl b/crypto/modes/asm/ghash-armv4.pl
index 0023bf994b..77fbf34465 100644
--- a/crypto/modes/asm/ghash-armv4.pl
+++ b/crypto/modes/asm/ghash-armv4.pl
@@ -365,7 +365,8 @@ ___
 }
 
 $code.=<<___;
-#if __ARM_ARCH__>=7
+#if __ARM_MAX_ARCH__>=7
+.arch	armv7-a
 .fpu	neon
 
 .global	gcm_init_neon
diff --git a/crypto/modes/gcm128.c b/crypto/modes/gcm128.c
index 261dc597a1..4038d9c364 100644
--- a/crypto/modes/gcm128.c
+++ b/crypto/modes/gcm128.c
@@ -675,7 +675,7 @@ void gcm_ghash_4bit_x86(u64 Xi[2],const u128 Htable[16],const u8 *inp,size_t len
 #  endif
 # elif defined(__arm__) || defined(__arm) || defined(__aarch64__)
 #  include "arm_arch.h"
-#  if __ARM_ARCH__>=7
+#  if __ARM_MAX_ARCH__>=7
 #   define GHASH_ASM_ARM
 #   define GCM_FUNCREF_4BIT
 #   define PMULL_CAPABLE	(OPENSSL_armcap_P & ARMV8_PMULL)
diff --git a/crypto/sha/asm/sha1-armv4-large.pl b/crypto/sha/asm/sha1-armv4-large.pl
index 50bd07b331..b2c30322c3 100644
--- a/crypto/sha/asm/sha1-armv4-large.pl
+++ b/crypto/sha/asm/sha1-armv4-large.pl
@@ -174,7 +174,7 @@ $code=<<___;
 
 .align	5
 sha1_block_data_order:
-#if __ARM_ARCH__>=7
+#if __ARM_MAX_ARCH__>=7
 	sub	r3,pc,#8		@ sha1_block_data_order
 	ldr	r12,.LOPENSSL_armcap
 	ldr	r12,[r3,r12]		@ OPENSSL_armcap_P
@@ -264,8 +264,10 @@ $code.=<<___;
 .LK_20_39:	.word	0x6ed9eba1
 .LK_40_59:	.word	0x8f1bbcdc
 .LK_60_79:	.word	0xca62c1d6
+#if __ARM_MAX_ARCH__>=7
 .LOPENSSL_armcap:
 .word	OPENSSL_armcap_P-sha1_block_data_order
+#endif
 .asciz	"SHA1 block transform for ARMv4/NEON/ARMv8, CRYPTOGAMS by <appro\@openssl.org>"
 .align	5
 ___
@@ -476,7 +478,8 @@ sub Xloop()
 }
 
 $code.=<<___;
-#if __ARM_ARCH__>=7
+#if __ARM_MAX_ARCH__>=7
+.arch	armv7-a
 .fpu	neon
 
 .type	sha1_block_data_order_neon,%function
@@ -563,7 +566,7 @@ my @Kxx=map("q$_",(8..11));
 my ($W0,$W1,$ABCD_SAVE)=map("q$_",(12..14));
 
 $code.=<<___;
-#if __ARM_ARCH__>=7
+#if __ARM_MAX_ARCH__>=7
 .type	sha1_block_data_order_armv8,%function
 .align	5
 sha1_block_data_order_armv8:
@@ -637,7 +640,9 @@ $code.=<<___;
 ___
 }}}
 $code.=<<___;
+#if __ARM_MAX_ARCH__>=7
 .comm	OPENSSL_armcap_P,4,4
+#endif
 ___
 
 {   my  %opcode = (
diff --git a/crypto/sha/asm/sha256-armv4.pl b/crypto/sha/asm/sha256-armv4.pl
index 505ca8f350..b0ae93633f 100644
--- a/crypto/sha/asm/sha256-armv4.pl
+++ b/crypto/sha/asm/sha256-armv4.pl
@@ -177,8 +177,10 @@ K256:
 .word	0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
 .size	K256,.-K256
 .word	0				@ terminator
+#if __ARM_MAX_ARCH__>=7
 .LOPENSSL_armcap:
 .word	OPENSSL_armcap_P-sha256_block_data_order
+#endif
 .align	5
 
 .global	sha256_block_data_order
@@ -186,7 +188,7 @@ K256:
 sha256_block_data_order:
 	sub	r3,pc,#8		@ sha256_block_data_order
 	add	$len,$inp,$len,lsl#6	@ len to point at the end of inp
-#if __ARM_ARCH__>=7
+#if __ARM_MAX_ARCH__>=7
 	ldr	r12,.LOPENSSL_armcap
 	ldr	r12,[r3,r12]		@ OPENSSL_armcap_P
 	tst	r12,#ARMV8_SHA256
@@ -423,7 +425,8 @@ sub body_00_15 () {
 }
 
 $code.=<<___;
-#if __ARM_ARCH__>=7
+#if __ARM_MAX_ARCH__>=7
+.arch	armv7-a
 .fpu	neon
 
 .type	sha256_block_data_order_neon,%function
@@ -545,7 +548,7 @@ my ($W0,$W1,$ABCD_SAVE,$EFGH_SAVE)=map("q$_",(12..15));
 my $Ktbl="r3";
 
 $code.=<<___;
-#if __ARM_ARCH__>=7
+#if __ARM_MAX_ARCH__>=7
 .type	sha256_block_data_order_armv8,%function
 .align	5
 sha256_block_data_order_armv8:
@@ -616,7 +619,9 @@ ___
 $code.=<<___;
 .asciz  "SHA256 block transform for ARMv4/NEON/ARMv8, CRYPTOGAMS by <appro\@openssl.org>"
 .align	2
+#if __ARM_MARCH_ARCH__>=7
 .comm   OPENSSL_armcap_P,4,4
+#endif
 ___
 
 {   my  %opcode = (
diff --git a/crypto/sha/asm/sha512-armv4.pl b/crypto/sha/asm/sha512-armv4.pl
index 1d5275b917..fb7dc506ac 100644
--- a/crypto/sha/asm/sha512-armv4.pl
+++ b/crypto/sha/asm/sha512-armv4.pl
@@ -237,16 +237,20 @@ WORD64(0x3c9ebe0a,0x15c9bebc, 0x431d67c4,0x9c100d4c)
 WORD64(0x4cc5d4be,0xcb3e42b6, 0x597f299c,0xfc657e2a)
 WORD64(0x5fcb6fab,0x3ad6faec, 0x6c44198c,0x4a475817)
 .size	K512,.-K512
+#if __ARM_MAX_ARCH__>=7
 .LOPENSSL_armcap:
 .word	OPENSSL_armcap_P-sha512_block_data_order
 .skip	32-4
+#else
+.skip	32
+#endif
 
 .global	sha512_block_data_order
 .type	sha512_block_data_order,%function
 sha512_block_data_order:
 	sub	r3,pc,#8		@ sha512_block_data_order
 	add	$len,$inp,$len,lsl#7	@ len to point at the end of inp
-#if __ARM_ARCH__>=7
+#if __ARM_MAX_ARCH__>=7
 	ldr	r12,.LOPENSSL_armcap
 	ldr	r12,[r3,r12]		@ OPENSSL_armcap_P
 	tst	r12,#1
@@ -551,7 +555,8 @@ ___
 }
 
 $code.=<<___;
-#if __ARM_ARCH__>=7
+#if __ARM_MAX_ARCH__>=7
+.arch	armv7-a
 .fpu	neon
 
 .align	4
@@ -592,7 +597,9 @@ $code.=<<___;
 .size	sha512_block_data_order,.-sha512_block_data_order
 .asciz	"SHA512 block transform for ARMv4/NEON, CRYPTOGAMS by <appro\@openssl.org>"
 .align	2
+#if __ARM_MAX_ARCH__>=7
 .comm	OPENSSL_armcap_P,4,4
+#endif
 ___
 
 $code =~ s/\`([^\`]*)\`/eval $1/gem;
-- 
2.25.1