Include .extern and .hidden in x86-64 asm.

This is backport of BoringSSL's d216b71f909fe56255813dab0a8d052534bdcb91
and https://boringssl-review.googlesource.com/3810 and should allow asm
on x86-64 to build correctly.

Change-Id: Id321768930182951223dbf90c4c910e24d9b6798

12 files changed, 33 insertions, 15 deletions

diff --git a/linux-x86_64/crypto/aes/aes-x86_64.S b/linux-x86_64/crypto/aes/aes-x86_64.S
index b01ad7f..5f4b057 100644
--- a/linux-x86_64/crypto/aes/aes-x86_64.S
+++ b/linux-x86_64/crypto/aes/aes-x86_64.S
@@ -1294,7 +1294,8 @@ asm_AES_set_decrypt_key:
 .globl	asm_AES_cbc_encrypt
 .hidden asm_AES_cbc_encrypt
 .type	asm_AES_cbc_encrypt,@function
-
+.extern	OPENSSL_ia32cap_P
+.hidden OPENSSL_ia32cap_P
 .hidden	asm_AES_cbc_encrypt
 asm_AES_cbc_encrypt:
 	cmpq	$0,%rdx
diff --git a/linux-x86_64/crypto/aes/aesni-x86_64.S b/linux-x86_64/crypto/aes/aesni-x86_64.S
index 9ab973d..ecefbe5 100644
--- a/linux-x86_64/crypto/aes/aesni-x86_64.S
+++ b/linux-x86_64/crypto/aes/aesni-x86_64.S
@@ -1,6 +1,7 @@
 #if defined(__x86_64__)
 .text	
-
+.extern	OPENSSL_ia32cap_P
+.hidden OPENSSL_ia32cap_P
 .globl	aesni_encrypt
 .hidden aesni_encrypt
 .type	aesni_encrypt,@function
diff --git a/linux-x86_64/crypto/aes/bsaes-x86_64.S b/linux-x86_64/crypto/aes/bsaes-x86_64.S
index 2960e95..8cfa4df 100644
--- a/linux-x86_64/crypto/aes/bsaes-x86_64.S
+++ b/linux-x86_64/crypto/aes/bsaes-x86_64.S
@@ -1,8 +1,10 @@
 #if defined(__x86_64__)
 .text	
 
-
-
+.extern	asm_AES_encrypt
+.hidden asm_AES_encrypt
+.extern	asm_AES_decrypt
+.hidden asm_AES_decrypt
 
 .type	_bsaes_encrypt8,@function
 .align	64
@@ -1063,7 +1065,8 @@ _bsaes_key_convert:
 
 	.byte	0xf3,0xc3
 .size	_bsaes_key_convert,.-_bsaes_key_convert
-
+.extern	asm_AES_cbc_encrypt
+.hidden asm_AES_cbc_encrypt
 .globl	bsaes_cbc_encrypt
 .hidden bsaes_cbc_encrypt
 .type	bsaes_cbc_encrypt,@function
diff --git a/linux-x86_64/crypto/bn/rsaz-x86_64.S b/linux-x86_64/crypto/bn/rsaz-x86_64.S
index fe0eed5..dd3d310 100644
--- a/linux-x86_64/crypto/bn/rsaz-x86_64.S
+++ b/linux-x86_64/crypto/bn/rsaz-x86_64.S
@@ -1,7 +1,8 @@
 #if defined(__x86_64__)
 .text	
 
-
+.extern	OPENSSL_ia32cap_P
+.hidden OPENSSL_ia32cap_P
 
 .globl	rsaz_512_sqr
 .hidden rsaz_512_sqr
diff --git a/linux-x86_64/crypto/bn/x86_64-mont.S b/linux-x86_64/crypto/bn/x86_64-mont.S
index ebe7678..4d401c6 100644
--- a/linux-x86_64/crypto/bn/x86_64-mont.S
+++ b/linux-x86_64/crypto/bn/x86_64-mont.S
@@ -1,7 +1,8 @@
 #if defined(__x86_64__)
 .text	
 
-
+.extern	OPENSSL_ia32cap_P
+.hidden OPENSSL_ia32cap_P
 
 .globl	bn_mul_mont
 .hidden bn_mul_mont
@@ -610,7 +611,8 @@ bn_mul4x_mont:
 .Lmul4x_epilogue:
 	.byte	0xf3,0xc3
 .size	bn_mul4x_mont,.-bn_mul4x_mont
-
+.extern	bn_sqr8x_internal
+.hidden bn_sqr8x_internal
 
 .type	bn_sqr8x_mont,@function
 .align	32
diff --git a/linux-x86_64/crypto/bn/x86_64-mont5.S b/linux-x86_64/crypto/bn/x86_64-mont5.S
index 357bc11..02edc69 100644
--- a/linux-x86_64/crypto/bn/x86_64-mont5.S
+++ b/linux-x86_64/crypto/bn/x86_64-mont5.S
@@ -1,7 +1,8 @@
 #if defined(__x86_64__)
 .text	
 
-
+.extern	OPENSSL_ia32cap_P
+.hidden OPENSSL_ia32cap_P
 
 .globl	bn_mul_mont_gather5
 .hidden bn_mul_mont_gather5
diff --git a/linux-x86_64/crypto/modes/ghash-x86_64.S b/linux-x86_64/crypto/modes/ghash-x86_64.S
index bd1b17f..1db7d69 100644
--- a/linux-x86_64/crypto/modes/ghash-x86_64.S
+++ b/linux-x86_64/crypto/modes/ghash-x86_64.S
@@ -1,6 +1,7 @@
 #if defined(__x86_64__)
 .text	
-
+.extern	OPENSSL_ia32cap_P
+.hidden OPENSSL_ia32cap_P
 
 .globl	gcm_gmult_4bit
 .hidden gcm_gmult_4bit
diff --git a/linux-x86_64/crypto/rc4/rc4-x86_64.S b/linux-x86_64/crypto/rc4/rc4-x86_64.S
index edd6565..b022808 100644
--- a/linux-x86_64/crypto/rc4/rc4-x86_64.S
+++ b/linux-x86_64/crypto/rc4/rc4-x86_64.S
@@ -1,6 +1,7 @@
 #if defined(__x86_64__)
 .text	
-
+.extern	OPENSSL_ia32cap_P
+.hidden OPENSSL_ia32cap_P
 
 .globl	asm_RC4
 .hidden asm_RC4
diff --git a/linux-x86_64/crypto/sha/sha1-x86_64.S b/linux-x86_64/crypto/sha/sha1-x86_64.S
index ea2f403..7668c2b 100644
--- a/linux-x86_64/crypto/sha/sha1-x86_64.S
+++ b/linux-x86_64/crypto/sha/sha1-x86_64.S
@@ -1,6 +1,7 @@
 #if defined(__x86_64__)
 .text	
-
+.extern	OPENSSL_ia32cap_P
+.hidden OPENSSL_ia32cap_P
 
 .globl	sha1_block_data_order
 .hidden sha1_block_data_order
diff --git a/linux-x86_64/crypto/sha/sha256-x86_64.S b/linux-x86_64/crypto/sha/sha256-x86_64.S
index 4649baf..f526de5 100644
--- a/linux-x86_64/crypto/sha/sha256-x86_64.S
+++ b/linux-x86_64/crypto/sha/sha256-x86_64.S
@@ -1,7 +1,8 @@
 #if defined(__x86_64__)
 .text	
 
-
+.extern	OPENSSL_ia32cap_P
+.hidden OPENSSL_ia32cap_P
 .globl	sha256_block_data_order
 .hidden sha256_block_data_order
 .type	sha256_block_data_order,@function
diff --git a/linux-x86_64/crypto/sha/sha512-x86_64.S b/linux-x86_64/crypto/sha/sha512-x86_64.S
index 89fd5bf..ca3a3a1 100644
--- a/linux-x86_64/crypto/sha/sha512-x86_64.S
+++ b/linux-x86_64/crypto/sha/sha512-x86_64.S
@@ -1,7 +1,8 @@
 #if defined(__x86_64__)
 .text	
 
-
+.extern	OPENSSL_ia32cap_P
+.hidden OPENSSL_ia32cap_P
 .globl	sha512_block_data_order
 .hidden sha512_block_data_order
 .type	sha512_block_data_order,@function
diff --git a/src/crypto/perlasm/x86_64-xlate.pl b/src/crypto/perlasm/x86_64-xlate.pl
index ed545f2..8b46329 100755
--- a/src/crypto/perlasm/x86_64-xlate.pl
+++ b/src/crypto/perlasm/x86_64-xlate.pl
@@ -497,7 +497,11 @@ my %globals;
 		$self->{value} = $dir . "\t" . $line;
 
 		if ($dir =~ /\.extern/) {
-		    $self->{value} = ""; # swallow extern
+		    if ($flavour eq "elf") {
+			$self->{value} .= "\n.hidden $line";
+		    } else {
+			$self->{value} = "";
+		    }
 		} elsif (!$elf && $dir =~ /\.type/) {
 		    $self->{value} = "";
 		    $self->{value} = ".def\t" . ($globals{$1} or $1) . ";\t" .