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linux-user/sparc: Add 64-bit support to fpu save/restore 

The shape of the kernel's __siginfo_fpu_t is dependent on
the cpu type, not the abi.  Which is weird, but there ya go.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210426025334.1168495-23-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Richard Henderson 2021-04-25 19:53:31 -07:00 committed by Laurent Vivier
parent 1176e57a8b
commit 11670e8492
1 changed files with 36 additions and 0 deletions
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36
linux-user/sparc/signal.c
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@ -44,6 +44,12 @@ struct target_stackf {
};
struct target_siginfo_fpu {
#ifdef TARGET_SPARC64
uint64_t si_double_regs[32];
uint64_t si_fsr;
uint64_t si_gsr;
uint64_t si_fprs;
#else
/* It is more convenient for qemu to move doubles, not singles. */
uint64_t si_double_regs[16];
uint32_t si_fsr;
@ -52,6 +58,7 @@ struct target_siginfo_fpu {
uint32_t insn_addr;
uint32_t insn;
} si_fpqueue [16];
#endif
};
struct target_signal_frame {
@ -167,21 +174,50 @@ static void save_fpu(struct target_siginfo_fpu *fpu, CPUSPARCState *env)
{
int i;
#ifdef TARGET_SPARC64
for (i = 0; i < 32; ++i) {
__put_user(env->fpr[i].ll, &fpu->si_double_regs[i]);
}
__put_user(env->fsr, &fpu->si_fsr);
__put_user(env->gsr, &fpu->si_gsr);
__put_user(env->fprs, &fpu->si_fprs);
#else
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);
#endif
}
static void restore_fpu(struct target_siginfo_fpu *fpu, CPUSPARCState *env)
{
int i;
#ifdef TARGET_SPARC64
uint64_t fprs;
__get_user(fprs, &fpu->si_fprs);
/* In case the user mucks about with FPRS, restore as directed. */
if (fprs & FPRS_DL) {
for (i = 0; i < 16; ++i) {
__get_user(env->fpr[i].ll, &fpu->si_double_regs[i]);
}
}
if (fprs & FPRS_DU) {
for (i = 16; i < 32; ++i) {
__get_user(env->fpr[i].ll, &fpu->si_double_regs[i]);
}
}
__get_user(env->fsr, &fpu->si_fsr);
__get_user(env->gsr, &fpu->si_gsr);
env->fprs |= fprs;
#else
for (i = 0; i < 16; ++i) {
__get_user(env->fpr[i].ll, &fpu->si_double_regs[i]);
}
__get_user(env->fsr, &fpu->si_fsr);
#endif
}
void setup_frame(int sig, struct target_sigaction *ka,