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[v2,24/33] target/mips: Adjust set_hflags_for_handler() for nanoMIPS

Message ID 1531169431-10772-25-git-send-email-aleksandar.markovic@rt-rk.com
State New
Headers show
Series Add nanoMIPS support to QEMU | expand

Commit Message

Aleksandar Markovic July 9, 2018, 8:50 p.m. UTC 
From: James Hogan <james.hogan@mips.com>

We shouldn't clear M16 mode when entering an interrupt on nanoMIPS,
otherwise we'll start interpreting the code as normal MIPS code.

Signed-off-by: James Hogan <james.hogan@mips.com>
Signed-off-by: Yongbok Kim <yongbok.kim@mips.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Stefan Markovic <smarkovic@wavecomp.com>
---
 target/mips/helper.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/target/mips/helper.c b/target/mips/helper.c
index 20a81aa..efc3f25 100644
--- a/target/mips/helper.c
+++ b/target/mips/helper.c
@@ -671,6 +671,9 @@  target_ulong exception_resume_pc (CPUMIPSState *env)
 #if !defined(CONFIG_USER_ONLY)
 static void set_hflags_for_handler (CPUMIPSState *env)
 {
+    if (env->insn_flags & ISA_NANOMIPS32) {
+        return;
+    }
     /* Exception handlers are entered in 32-bit mode.  */
     env->hflags &= ~(MIPS_HFLAG_M16);
     /* ...except that microMIPS lets you choose.  */