[Qemu-devel] [PATCH v3 04/11] linux-user: arm: set CPSR.E correctly for BE8 mode

[Paolo Bonzini <pbonzini@redhat.com>]

Set it on startup, in signal handler frames and in new threads.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 linux-user/arm/target_cpu.h | 2 ++
 linux-user/main.c           | 3 ++-
 linux-user/signal.c         | 2 ++
 target-arm/cpu.h            | 3 +++
 4 files changed, 9 insertions(+), 1 deletions(-)

diff --git a/linux-user/arm/target_cpu.h b/linux-user/arm/target_cpu.h
index 39d65b6..d0411c7 100644
--- a/linux-user/arm/target_cpu.h
+++ b/linux-user/arm/target_cpu.h
@@ -25,6 +25,8 @@ static inline void cpu_clone_regs(CPUARMState *env, target_ulong newsp)
         env->regs[13] = newsp;
     }
     env->regs[0] = 0;
+    env->uncached_cpsr &= ~CPSR_E;
+    env->uncached_cpsr |= env->signal_cpsr_e;
 }
 
 static inline void cpu_set_tls(CPUARMState *env, target_ulong newtls)
diff --git a/linux-user/main.c b/linux-user/main.c
index dbaa42a..795a407 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -4195,7 +4195,8 @@ int main(int argc, char **argv, char **envp)
         /* Enable BE8.  */
         if (EF_ARM_EABI_VERSION(info->elf_flags) >= EF_ARM_EABI_VER4
             && (info->elf_flags & EF_ARM_BE8)) {
-            /* nothing for now, CPSR.E not emulated yet */
+            env->uncached_cpsr |= CPSR_E;
+            env->signal_cpsr_e = CPSR_E;
         } else {
             if (arm_feature(env, ARM_FEATURE_V7)) {
                 fprintf(stderr, "BE32 binaries only supported until ARMv6\n");
diff --git a/linux-user/signal.c b/linux-user/signal.c
index 624c34d..87ddabd 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -1609,6 +1609,8 @@ setup_return(CPUARMState *env, struct target_sigaction *ka,
         cpsr &= ~CPSR_T;
     }
 
+    cpsr |= env->signal_cpsr_e;
+
     if (ka->sa_flags & TARGET_SA_RESTORER) {
         retcode = ka->sa_restorer;
     } else {
diff --git a/target-arm/cpu.h b/target-arm/cpu.h
index 4a9d2a8..cb5be84 100644
--- a/target-arm/cpu.h
+++ b/target-arm/cpu.h
@@ -316,6 +316,9 @@ typedef struct CPUARMState {
 #if defined(CONFIG_USER_ONLY)
     /* For usermode syscall translation.  */
     int eabi;
+
+    /* CPSR.E value for new threads and signal handlers.  */
+    uint32_t signal_cpsr_e;
 #endif
 
     CPU_COMMON
-- 
1.9.3