rev/armssembly_0

rev/armssembly_0/chall.S

@@ -0,0 +1,59 @@
+	.arch armv8-a
+	.file	"chall.c"
+	.text
+	.align	2
+	.global	func1
+	.type	func1, %function
+func1:
+	sub	sp, sp, #16
+	str	w0, [sp, 12]
+	str	w1, [sp, 8]
+	ldr	w1, [sp, 12]
+	ldr	w0, [sp, 8]
+	cmp	w1, w0
+	bls	.L2
+	ldr	w0, [sp, 12]
+	b	.L3
+.L2:
+	ldr	w0, [sp, 8]
+.L3:
+	add	sp, sp, 16
+	ret
+	.size	func1, .-func1
+	.section	.rodata
+	.align	3
+.LC0:
+	.string	"Result: %ld\n"
+	.text
+	.align	2
+	.global	main
+	.type	main, %function
+main:
+	stp	x29, x30, [sp, -48]!
+	add	x29, sp, 0
+	str	x19, [sp, 16]
+	str	w0, [x29, 44]
+	str	x1, [x29, 32]
+	ldr	x0, [x29, 32]
+	add	x0, x0, 8
+	ldr	x0, [x0]
+	bl	atoi
+	mov	w19, w0
+	ldr	x0, [x29, 32]
+	add	x0, x0, 16
+	ldr	x0, [x0]
+	bl	atoi
+	mov	w1, w0
+	mov	w0, w19
+	bl	func1
+	mov	w1, w0
+	adrp	x0, .LC0
+	add	x0, x0, :lo12:.LC0
+	bl	printf
+	mov	w0, 0
+	ldr	x19, [sp, 16]
+	ldp	x29, x30, [sp], 48
+	ret
+	.size	main, .-main
+	.ident	"GCC: (Ubuntu/Linaro 7.5.0-3ubuntu1~18.04) 7.5.0"
+	.section	.note.GNU-stack,"",@progbits

rev/armssembly_0/solve.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p pkgsCross.aarch64-multiplatform.stdenv.cc
+
+"$CC_FOR_TARGET" chall.S -o chall
+
+./chall 2593949075 2233560849 | cut -d' ' -f2 | xargs printf "picoCTF{%08x}\n"