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[Qemu-devel] [PULL 14/22] armv7m: set CFSR.UNDEFINSTR on undefined instr

From: Peter Maydell
Subject: [Qemu-devel] [PULL 14/22] armv7m: set CFSR.UNDEFINSTR on undefined instructions
Date: Fri, 27 Jan 2017 15:32:09 +0000

From: Michael Davidsaver <address@hidden>

When we take an exception for an undefined instruction, set the
appropriate CFSR bit.

Signed-off-by: Michael Davidsaver <address@hidden>
Reviewed-by: Alex Bennée <address@hidden>
Message-id: address@hidden
[PMM: tweaked commit message, comment]
Signed-off-by: Peter Maydell <address@hidden>
 target/arm/helper.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/target/arm/helper.c b/target/arm/helper.c
index 7dc30f5..e6b1c36 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -6072,6 +6072,7 @@ void arm_v7m_cpu_do_interrupt(CPUState *cs)
     switch (cs->exception_index) {
     case EXCP_UDEF:
         armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE);
+        env->v7m.cfsr |= R_V7M_CFSR_UNDEFINSTR_MASK;
     case EXCP_SWI:
         /* The PC already points to the next instruction.  */

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