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target/m68k,linux-user: manage FP registers in ucontext 

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Laurent Vivier 2017-09-14 18:35:05 +02:00 committed by Riku Voipio
parent 5f9cee46cd
commit ee46a46b02
1 changed files with 43 additions and 0 deletions
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43
linux-user/signal.c
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@ -5704,6 +5704,24 @@ give_sigsegv:
force_sigsegv(sig);
}
static inline void target_rt_save_fpu_state(struct target_ucontext *uc,
CPUM68KState *env)
{
int i;
target_fpregset_t *fpregs = &uc->tuc_mcontext.fpregs;
__put_user(env->fpcr, &fpregs->f_fpcntl[0]);
__put_user(env->fpsr, &fpregs->f_fpcntl[1]);
/* fpiar is not emulated */
for (i = 0; i < 8; i++) {
uint32_t high = env->fregs[i].d.high << 16;
__put_user(high, &fpregs->f_fpregs[i * 3]);
__put_user(env->fregs[i].d.low,
(uint64_t *)&fpregs->f_fpregs[i * 3 + 1]);
}
}
static inline int target_rt_setup_ucontext(struct target_ucontext *uc,
CPUM68KState *env)
{
@ -5730,9 +5748,32 @@ static inline int target_rt_setup_ucontext(struct target_ucontext *uc,
__put_user(env->pc, &gregs[16]);
__put_user(sr, &gregs[17]);
target_rt_save_fpu_state(uc, env);
return 0;
}
static inline void target_rt_restore_fpu_state(CPUM68KState *env,
struct target_ucontext *uc)
{
int i;
target_fpregset_t *fpregs = &uc->tuc_mcontext.fpregs;
uint32_t fpcr;
__get_user(fpcr, &fpregs->f_fpcntl[0]);
cpu_m68k_set_fpcr(env, fpcr);
__get_user(env->fpsr, &fpregs->f_fpcntl[1]);
/* fpiar is not emulated */
for (i = 0; i < 8; i++) {
uint32_t high;
__get_user(high, &fpregs->f_fpregs[i * 3]);
env->fregs[i].d.high = high >> 16;
__get_user(env->fregs[i].d.low,
(uint64_t *)&fpregs->f_fpregs[i * 3 + 1]);
}
}
static inline int target_rt_restore_ucontext(CPUM68KState *env,
struct target_ucontext *uc)
{
@ -5764,6 +5805,8 @@ static inline int target_rt_restore_ucontext(CPUM68KState *env,
__get_user(temp, &gregs[17]);
cpu_m68k_set_ccr(env, temp);
target_rt_restore_fpu_state(env, uc);
return 0;
badframe: