asm: add .note.GNU-stack section for non-exec stack

fanquake · fanquake · commit 33dc7e4d3e19 · 2023-11-13T14:49:35.000Z
With this in place, we no-longer see warnings like the following: ```bash /usr/lib/gcc-cross/arm-linux-gnueabihf/12/../../../../arm-linux-gnueabihf/bin/ld: warning: field_10x26_arm.o: missing .note.GNU-stack section implies executable stack /usr/lib/gcc-cross/arm-linux-gnueabihf/12/../../../../arm-linux-gnueabihf/bin/ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker ``` Should close #1434.
diff --git a/src/asm/field_10x26_arm.s b/src/asm/field_10x26_arm.s
@@ -913,3 +913,4 @@ secp256k1_fe_sqr_inner:
 	ldmfd	sp!, {r4, r5, r6, r7, r8, r9, r10, r11, pc}
 	.size	secp256k1_fe_sqr_inner, .-secp256k1_fe_sqr_inner
 
+	.section .note.GNU-stack,"",%progbits

Original file line number	Diff line number	Diff line change
`@@ -913,3 +913,4 @@ secp256k1_fe_sqr_inner:`
`913`	`913`	`ldmfd sp!, {r4, r5, r6, r7, r8, r9, r10, r11, pc}`
`914`	`914`	`.size secp256k1_fe_sqr_inner, .-secp256k1_fe_sqr_inner`
`915`	`915`
	`916`	`+ .section .note.GNU-stack,"",%progbits`