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authorPeter Maydell <peter.maydell@linaro.org>2013-12-17 19:42:30 +0000
committerPeter Maydell <peter.maydell@linaro.org>2013-12-17 19:42:30 +0000
commitd356312fdc8640af929e0dbab61c6e514d47feb8 (patch)
treeef3cdeaf3ef2e87cb21cc42199f2fe5188f82ae9 /linux-user
parentb197ebd410f0298ec078c3048f9cfb9f6bfc3b3c (diff)
target-arm: Clean up handling of AArch64 PSTATE
The env->pstate field is a little odd since it doesn't strictly speaking represent an architectural register. However it's convenient for QEMU to use it to hold the various PSTATE architectural bits in the same format the architecture specifies for SPSR registers (since this is the same format the kernel uses for signal handlers and the KVM register). Add some structure to how we deal with it: * document what env->pstate is * add some #defines for various bits in it * add helpers for reading/writing it taking account of caching of NZCV, and use them where appropriate * reset it on startup Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1385645602-18662-3-git-send-email-peter.maydell@linaro.org Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'linux-user')
-rw-r--r--linux-user/signal.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/linux-user/signal.c b/linux-user/signal.c
index 7751c47ef1..4e7148a2d6 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -1171,7 +1171,7 @@ static int target_setup_sigframe(struct target_rt_sigframe *sf,
}
__put_user(env->xregs[31], &sf->uc.tuc_mcontext.sp);
__put_user(env->pc, &sf->uc.tuc_mcontext.pc);
- __put_user(env->pstate, &sf->uc.tuc_mcontext.pstate);
+ __put_user(pstate_read(env), &sf->uc.tuc_mcontext.pstate);
__put_user(/*current->thread.fault_address*/ 0,
&sf->uc.tuc_mcontext.fault_address);
@@ -1210,6 +1210,7 @@ static int target_restore_sigframe(CPUARMState *env,
struct target_aux_context *aux =
(struct target_aux_context *)sf->uc.tuc_mcontext.__reserved;
uint32_t magic, size;
+ uint64_t pstate;
target_to_host_sigset(&set, &sf->uc.tuc_sigmask);
sigprocmask(SIG_SETMASK, &set, NULL);
@@ -1220,7 +1221,8 @@ static int target_restore_sigframe(CPUARMState *env,
__get_user(env->xregs[31], &sf->uc.tuc_mcontext.sp);
__get_user(env->pc, &sf->uc.tuc_mcontext.pc);
- __get_user(env->pstate, &sf->uc.tuc_mcontext.pstate);
+ __get_user(pstate, &sf->uc.tuc_mcontext.pstate);
+ pstate_write(env, pstate);
__get_user(magic, &aux->fpsimd.head.magic);
__get_user(size, &aux->fpsimd.head.size);