From b67c9ae8ab0d4a625f3291fce37c0f2aba5102d5 Mon Sep 17 00:00:00 2001
From: Alwin Berger <alwin.berger@tu-dortmund.de>
Date: Fri, 14 Jun 2024 13:54:57 +0200
Subject: [PATCH] add libafl_qemu_read_user_sp_unchecked

---
 cpu-target.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/cpu-target.c b/cpu-target.c
index b6233f6bd1..2e465ee144 100644
--- a/cpu-target.c
+++ b/cpu-target.c
@@ -160,6 +160,19 @@ int libafl_qemu_num_regs(CPUState* cpu)
     return cc->gdb_num_core_regs;
 }
 
+#ifdef TARGET_ARM
+// use-case: get the user-stack pointer and return addr from at an isr-return
+#include "target/arm/cpu.h"
+#include "target/arm/internals.h"
+
+int libafl_qemu_read_user_sp_unchecked(CPUState* cpu);
+int libafl_qemu_read_user_sp_unchecked(CPUState* cpu) {
+    CPUARMState *env = cpu_env(cpu);
+    return env->v7m.other_sp;
+}
+
+#endif
+
 #ifndef CONFIG_USER_ONLY
 hwaddr libafl_qemu_current_paging_id(CPUState* cpu)
 {