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linux-user/sparc: Save and restore fpu in signal frame 

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210426025334.1168495-19-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Richard Henderson 2021-04-25 19:53:27 -07:00 committed by Laurent Vivier
parent a0774ec4d4
commit 71cda6e912
1 changed files with 51 additions and 33 deletions
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84
linux-user/sparc/signal.c
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@ -43,26 +43,25 @@ struct target_stackf {
abi_ulong xargs[8];
};
typedef struct {
abi_ulong si_float_regs[32];
unsigned long si_fsr;
unsigned long si_fpqdepth;
struct target_siginfo_fpu {
/* It is more convenient for qemu to move doubles, not singles. */
uint64_t si_double_regs[16];
uint32_t si_fsr;
uint32_t si_fpqdepth;
struct {
unsigned long *insn_addr;
unsigned long insn;
uint32_t insn_addr;
uint32_t insn;
} si_fpqueue [16];
} qemu_siginfo_fpu_t;
};
struct target_signal_frame {
struct target_stackf ss;
struct target_pt_regs regs;
uint32_t si_mask;
abi_ulong fpu_save;
uint32_t insns[2] QEMU_ALIGNED(8);
abi_ulong extramask[TARGET_NSIG_WORDS - 1];
abi_ulong extra_size; /* Should be 0 */
qemu_siginfo_fpu_t fpu_state;
uint32_t si_mask;
abi_ulong fpu_save;
uint32_t insns[2] QEMU_ALIGNED(8);
abi_ulong extramask[TARGET_NSIG_WORDS - 1];
abi_ulong extra_size; /* Should be 0 */
};
static abi_ulong get_sigframe(struct target_sigaction *sa,
@ -163,33 +162,51 @@ static void save_reg_win(struct target_reg_window *win, CPUSPARCState *env)
}
}
#define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7)))
static void save_fpu(struct target_siginfo_fpu *fpu, CPUSPARCState *env)
{
int i;
for (i = 0; i < 16; ++i) {
__put_user(env->fpr[i].ll, &fpu->si_double_regs[i]);
}
__put_user(env->fsr, &fpu->si_fsr);
__put_user(0, &fpu->si_fpqdepth);
}
static void restore_fpu(struct target_siginfo_fpu *fpu, CPUSPARCState *env)
{
int i;
for (i = 0; i < 16; ++i) {
__get_user(env->fpr[i].ll, &fpu->si_double_regs[i]);
}
__get_user(env->fsr, &fpu->si_fsr);
}
void setup_frame(int sig, struct target_sigaction *ka,
target_sigset_t *set, CPUSPARCState *env)
{
abi_ulong sf_addr;
struct target_signal_frame *sf;
int sigframe_size, i;
size_t sf_size = sizeof(*sf) + sizeof(struct target_siginfo_fpu);
int i;
/* 1. Make sure everything is clean */
//synchronize_user_stack();
sigframe_size = NF_ALIGNEDSZ;
sf_addr = get_sigframe(ka, env, sigframe_size);
sf_addr = get_sigframe(ka, env, sf_size);
trace_user_setup_frame(env, sf_addr);
sf = lock_user(VERIFY_WRITE, sf_addr,
sizeof(struct target_signal_frame), 0);
sf = lock_user(VERIFY_WRITE, sf_addr, sf_size, 0);
if (!sf) {
goto sigsegv;
}
/* 2. Save the current process state */
save_pt_regs(&sf->regs, env);
__put_user(0, &sf->extra_size);
//save_fpu_state(regs, &sf->fpu_state);
//__put_user(&sf->fpu_state, &sf->fpu_save);
save_fpu((struct target_siginfo_fpu *)(sf + 1), env);
__put_user(sf_addr + sizeof(*sf), &sf->fpu_save);
__put_user(set->sig[0], &sf->si_mask);
for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
@ -226,7 +243,7 @@ void setup_frame(int sig, struct target_sigaction *ka,
val32 = 0x91d02010;
__put_user(val32, &sf->insns[1]);
}
unlock_user(sf, sf_addr, sizeof(struct target_signal_frame));
unlock_user(sf, sf_addr, sf_size);
return;
#if 0
sigill_and_return:
@ -248,7 +265,7 @@ long do_sigreturn(CPUSPARCState *env)
{
abi_ulong sf_addr;
struct target_signal_frame *sf;
abi_ulong pc, npc;
abi_ulong pc, npc, ptr;
target_sigset_t set;
sigset_t host_set;
int i;
@ -276,14 +293,15 @@ long do_sigreturn(CPUSPARCState *env)
env->pc = pc;
env->npc = npc;
/* FIXME: implement FPU save/restore:
* __get_user(fpu_save, &sf->fpu_save);
* if (fpu_save) {
* if (restore_fpu_state(env, fpu_save)) {
* goto segv_and_exit;
* }
* }
*/
__get_user(ptr, &sf->fpu_save);
if (ptr) {
struct target_siginfo_fpu *fpu;
if ((ptr & 3) || !lock_user_struct(VERIFY_READ, fpu, ptr, 1)) {
goto segv_and_exit;
}
restore_fpu(fpu, env);
unlock_user_struct(fpu, ptr, 0);
}
__get_user(set.sig[0], &sf->si_mask);
for (i = 1; i < TARGET_NSIG_WORDS; i++) {