s390x assembler update: add support for run-time facility detection [from HEAD].

Configure

@@ -133,7 +133,7 @@ my $sparcv9_asm="sparcv9cap.o sparccpuid.o:bn-sparcv9.o sparcv9-mont.o sparcv9a-
 my $sparcv8_asm=":sparcv8.o:des_enc-sparc.o fcrypt_b.o:::::::::::void";
 my $alpha_asm="alphacpuid.o:bn_asm.o alpha-mont.o::::::::::::void";
 my $mips3_asm=":bn-mips3.o::::::::::::void";
-my $s390x_asm="s390xcpuid.o:bn-s390x.o s390x-mont.o::aes-s390x.o:::sha1-s390x.o sha256-s390x.o sha512-s390x.o::rc4-s390x.o:::::void";
+my $s390x_asm="s390xcap.o s390xcpuid.o:bn-s390x.o s390x-mont.o::aes-s390x.o:::sha1-s390x.o sha256-s390x.o sha512-s390x.o::rc4-s390x.o:::::void";
 my $armv4_asm=":bn_asm.o armv4-mont.o::aes_cbc.o aes-armv4.o:::sha1-armv4-large.o sha256-armv4.o sha512-armv4.o:::::::void";
 my $ppc32_asm="ppccpuid.o:bn-ppc.o::aes_core.o aes_cbc.o aes-ppc.o:::sha1-ppc.o sha256-ppc.o::::::";
 my $ppc64_asm="ppccpuid.o:bn-ppc.o ppc-mont.o::aes_core.o aes_cbc.o aes-ppc.o:::sha1-ppc.o sha256-ppc.o sha512-ppc.o::::::";

TABLE

@@ -3728,7 +3728,7 @@ $thread_cflag = -D_REENTRANT
 $sys_id       = 
 $lflags       = -ldl
 $bn_ops       = SIXTY_FOUR_BIT_LONG RC4_CHAR RC4_CHUNK DES_INT DES_UNROLL
-$cpuid_obj    = s390xcpuid.o
+$cpuid_obj    = s390xcap.o s390xcpuid.o
 $bn_obj       = bn-s390x.o s390x-mont.o
 $des_obj      = 
 $aes_obj      = aes-s390x.o

crypto/aes/asm/aes-s390x.pl

@@ -765,6 +765,11 @@ $code.=<<___ if (!$softonly);
 	srl	%r5,6
 	ar	%r5,%r0
 
+	larl	%r1,OPENSSL_s390xcap_P
+	lg	%r0,0(%r1)
+	tmhl	%r0,0x4000	# check for message-security assist
+	jz	.Lekey_internal
+
 	lghi	%r0,0		# query capability vector
 	la	%r1,16($sp)
 	.long	0xb92f0042	# kmc %r4,%r2
@@ -1323,6 +1328,7 @@ $code.=<<___;
 4:	ex	$len,0($s1)
 	j	.Lcbc_dec_exit
 .size	AES_cbc_encrypt,.-AES_cbc_encrypt
+.comm  OPENSSL_s390xcap_P,8,8
 ___
 }
 $code.=<<___;

crypto/s390xcap.c

@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <setjmp.h>
+#include <signal.h>
+
+extern unsigned long OPENSSL_s390xcap_P;
+
+static sigjmp_buf ill_jmp;
+static void ill_handler (int sig) { siglongjmp(ill_jmp,sig); }
+
+unsigned long OPENSSL_s390x_facilities(void);
+
+void OPENSSL_cpuid_setup(void)
+	{
+	sigset_t oset;
+	struct sigaction ill_act,oact;
+
+	if (OPENSSL_s390xcap_P) return;
+
+	memset(&ill_act,0,sizeof(ill_act));
+	ill_act.sa_handler = ill_handler;
+	sigfillset(&ill_act.sa_mask);
+	sigdelset(&ill_act.sa_mask,SIGILL);
+	sigdelset(&ill_act.sa_mask,SIGTRAP);
+	sigprocmask(SIG_SETMASK,&ill_act.sa_mask,&oset);
+	sigaction (SIGILL,&ill_act,&oact);
+
+	/* protection against missing store-facility-list-extended */
+	if (sigsetjmp(ill_jmp,0) == 0)
+		OPENSSL_s390xcap_P = OPENSSL_s390x_facilities();
+	else
+		OPENSSL_s390xcap_P = 1UL<<63;
+
+	sigaction (SIGILL,&oact,NULL);
+	sigprocmask(SIG_SETMASK,&oset,NULL);
+	}

crypto/s390xcpuid.S

@@ -1,12 +1,5 @@
 .text
 
-.globl	OPENSSL_cpuid_setup
-.type	OPENSSL_cpuid_setup,@function
-.align	16
-OPENSSL_cpuid_setup:
-	br	%r14		# reserved for future
-.size	OPENSSL_cpuid_setup,.-OPENSSL_cpuid_setup
-
 .globl	OPENSSL_s390x_facilities
 .type	OPENSSL_s390x_facilities,@function
 .align	16
@@ -14,6 +7,8 @@ OPENSSL_s390x_facilities:
 	lghi	%r0,0
 	.long	0xb2b0f010	# stfle	16(%r15)
 	lg	%r2,16(%r15)
+	larl	%r1,OPENSSL_s390xcap_P
+	stg	%r2,0(%r1)
 	br	%r14
 .size	OPENSSL_s390x_facilities,.-OPENSSL_s390x_facilities
 
@@ -88,3 +83,8 @@ OPENSSL_cleanse:
 	jnz	.Little
 	br	%r14
 .size	OPENSSL_cleanse,.-OPENSSL_cleanse
+
+.section	.init
+	brasl	%r14,OPENSSL_cpuid_setup
+
+.comm	OPENSSL_s390xcap_P,8,8

crypto/sha/asm/sha1-s390x.pl

@@ -143,6 +143,10 @@ Ktable: .long	0x5a827999,0x6ed9eba1,0x8f1bbcdc,0xca62c1d6
 sha1_block_data_order:
 ___
 $code.=<<___ if ($kimdfunc);
+	larl	%r1,OPENSSL_s390xcap_P
+	lg	%r0,0(%r1)
+	tmhl	%r0,0x4000	# check for message-security assist
+	jz	.Lsoftware
 	lghi	%r0,0
 	la	%r1,16($sp)
 	.long	0xb93e0002	# kimd %r0,%r2
@@ -213,6 +217,7 @@ $code.=<<___;
 	br	%r14
 .size	sha1_block_data_order,.-sha1_block_data_order
 .string	"SHA1 block transform for s390x, CRYPTOGAMS by <appro\@openssl.org>"
+.comm	OPENSSL_s390xcap_P,8,8
 ___
 
 $code =~ s/\`([^\`]*)\`/eval $1/gem;

crypto/sha/asm/sha512-s390x.pl

@@ -214,6 +214,10 @@ $code.=<<___;
 $Func:
 ___
 $code.=<<___ if ($kimdfunc);
+	larl	%r1,OPENSSL_s390xcap_P
+	lg	%r0,0(%r1)
+	tmhl	%r0,0x4000	# check for message-security assist
+	jz	.Lsoftware
 	lghi	%r0,0
 	la	%r1,16($sp)
 	.long	0xb93e0002	# kimd %r0,%r2
@@ -286,6 +290,7 @@ $code.=<<___;
 	br	%r14
 .size	$Func,.-$Func
 .string	"SHA${label} block transform for s390x, CRYPTOGAMS by <appro\@openssl.org>"
+.comm	OPENSSL_s390xcap_P,8,8
 ___
 
 $code =~ s/\`([^\`]*)\`/eval $1/gem;