libbb: mark stack in assembly files read-only

Signed-off-by: Ludwig Nussel <ludwig.nussel@suse.de>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

libbb/hash_md5_sha256_x86-32_shaNI.S

@@ -19,6 +19,9 @@
 // We do not check SSSE3 in cpuid,
 // all SHA-capable CPUs support it as well.
 
+#ifdef __linux__
+	.section	.note.GNU-stack, "", @progbits
+#endif
 	.section	.text.sha256_process_block64_shaNI, "ax", @progbits
 	.globl	sha256_process_block64_shaNI
 	.hidden	sha256_process_block64_shaNI

libbb/hash_md5_sha256_x86-64_shaNI.S

@@ -19,6 +19,9 @@
 // We do not check SSSE3 in cpuid,
 // all SHA-capable CPUs support it as well.
 
+#ifdef __linux__
+	.section	.note.GNU-stack, "", @progbits
+#endif
 	.section	.text.sha256_process_block64_shaNI, "ax", @progbits
 	.globl	sha256_process_block64_shaNI
 	.hidden	sha256_process_block64_shaNI

libbb/hash_md5_sha_x86-32_shaNI.S

@@ -25,6 +25,9 @@
 // We do not check SSSE3/SSE4.1 in cpuid,
 // all SHA-capable CPUs support them as well.
 
+#ifdef __linux__
+	.section	.note.GNU-stack, "", @progbits
+#endif
 	.section	.text.sha1_process_block64_shaNI, "ax", @progbits
 	.globl	sha1_process_block64_shaNI
 	.hidden	sha1_process_block64_shaNI

libbb/hash_md5_sha_x86-64.S

@@ -1,6 +1,9 @@
 ### Generated by hash_md5_sha_x86-64.S.sh ###
 
 #if CONFIG_SHA1_SMALL == 0 && defined(__GNUC__) && defined(__x86_64__)
+#ifdef __linux__
+	.section	.note.GNU-stack, "", @progbits
+#endif
 	.section	.text.sha1_process_block64, "ax", @progbits
 	.globl	sha1_process_block64
 	.hidden	sha1_process_block64

libbb/hash_md5_sha_x86-64.S.sh

@@ -127,6 +127,9 @@ echo \
 "### Generated by hash_md5_sha_x86-64.S.sh ###
 
 #if CONFIG_SHA1_SMALL == 0 && defined(__GNUC__) && defined(__x86_64__)
+#ifdef __linux__
+	.section	.note.GNU-stack, \"\", @progbits
+#endif
 	.section	.text.sha1_process_block64, \"ax\", @progbits
 	.globl	sha1_process_block64
 	.hidden	sha1_process_block64

libbb/hash_md5_sha_x86-64_shaNI.S

@@ -25,6 +25,9 @@
 // We do not check SSSE3/SSE4.1 in cpuid,
 // all SHA-capable CPUs support them as well.
 
+#ifdef __linux__
+	.section	.note.GNU-stack, "", @progbits
+#endif
 	.section	.text.sha1_process_block64_shaNI, "ax", @progbits
 	.globl	sha1_process_block64_shaNI
 	.hidden	sha1_process_block64_shaNI