From ca8b6e6696e279f56faacad39501019c3762a1b7 Mon Sep 17 00:00:00 2001
From: Alejandro Soto <alejandro@34project.org>
Date: Fri, 16 Dec 2022 23:36:05 -0600
Subject: Fix privilege escalation while in user mode

---
 rtl/core/psr.sv | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'rtl/core/psr.sv')

diff --git a/rtl/core/psr.sv b/rtl/core/psr.sv
index 41982c0..7bbffe6 100644
--- a/rtl/core/psr.sv
+++ b/rtl/core/psr.sv
@@ -8,6 +8,7 @@ module core_psr
 	                   saved,
 	                   wr_flags,
 	                   wr_control,
+	                   escalating,
 	                   update_flags,
 	                   alu_v_valid,
 	input  psr_flags   alu_flags,
@@ -133,7 +134,7 @@ module core_psr
 			wr_clean.mode = mode;
 		end
 
-		if(mode == `MODE_USR) begin
+		if(mode == `MODE_USR && !escalating) begin
 			wr_clean.mask = mask;
 			wr_clean.mode = `MODE_USR;
 		end
-- 
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