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kernel: add xsave support

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monkuous
2025-11-15 23:20:05 +01:00
parent 4024c42af1
commit d301ec6955
8 changed files with 190 additions and 61 deletions
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kernel-src/sys/signal.c
+15 -14
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@@ -540,7 +540,7 @@ bool signal_check(struct thread_t *thread, context_t *context, bool syscall, uin
// get where in memory to put the frame
#if ARCH_SIGNAL_STACK_GROWS_DOWNWARDS == 1
void *stack = altstack ? (void *)((uintptr_t)altstack + thread->signals.stack.size) : (void *)CTX_SP(context);
stack = (void *)((((uintptr_t)stack - ARCH_SIGNAL_REDZONE_SIZE - sizeof(sigframe_t)) & ~0xfl) - 0x8);
stack = (void *)((((uintptr_t)stack - ARCH_SIGNAL_REDZONE_SIZE - ARCH_SIGFRAME_SIZE) & ~0xfl) - 0x8);
#else
#error unsupported
#endif
@@ -553,35 +553,36 @@ bool signal_check(struct thread_t *thread, context_t *context, bool syscall, uin
}
// configure stack frame
sigframe_t sigframe;
sigframe.restorer = action->restorer;
sigframe_t *sigframe = __builtin_alloca(ARCH_SIGFRAME_SIZE);
arch_sigframe_init(sigframe);
sigframe->restorer = action->restorer;
if (altstack) {
memcpy(&sigframe.oldstack, &thread->signals.stack, sizeof(stack_t));
memcpy(&sigframe->oldstack, &thread->signals.stack, sizeof(stack_t));
memset(&thread->signals.stack, 0, sizeof(stack_t));
} else {
memset(&sigframe.oldstack, 0, sizeof(stack_t));
memset(&sigframe->oldstack, 0, sizeof(stack_t));
}
if (thread->signals.hasreturnmask) {
// if we were waiting in signal_suspend, push the old mask into the return frame
// of the first signal and set it to not act this way the next check
memcpy(&sigframe.oldmask, &thread->signals.returnmask, sizeof(sigset_t));
memcpy(&sigframe->oldmask, &thread->signals.returnmask, sizeof(sigset_t));
thread->signals.hasreturnmask = false;
} else {
// else, just push the current mask
memcpy(&sigframe.oldmask, &thread->signals.mask, sizeof(sigset_t));
memcpy(&sigframe->oldmask, &thread->signals.mask, sizeof(sigset_t));
}
memcpy(&sigframe.context, context, sizeof(context_t));
memcpy(&sigframe.extracontext, &thread->extracontext, sizeof(extracontext_t));
memcpy(&sigframe->context, context, sizeof(context_t));
arch_extracontext_copy(&sigframe->extracontext, &thread->extracontext);
arch_sigframe_prepare_mcontext(stack, &sigframe);
arch_sigframe_prepare_mcontext(stack, sigframe);
memset(&sigframe.siginfo, 0, sizeof(siginfo_t));
memset(&sigframe->siginfo, 0, sizeof(siginfo_t));
if (signal == SIGSEGV)
sigframe.siginfo.__si_fields.__sigfault.si_addr = CTX_TRAP_ADDR(context);
sigframe->siginfo.__si_fields.__sigfault.si_addr = CTX_TRAP_ADDR(context);
if (usercopy_touser(stack, &sigframe, sizeof(sigframe_t))) {
printf("signal: bad user stack %p (altstack %p) handling signal %d trapno %lu\n", stack, altstack, signal, sigframe.mcontext.gregs[MCONTEXT_REG_TRAPNO]);
if (usercopy_touser(stack, sigframe, ARCH_SIGFRAME_SIZE)) {
printf("signal: bad user stack %p (altstack %p) handling signal %d trapno %lu\n", stack, altstack, signal, sigframe->mcontext.gregs[MCONTEXT_REG_TRAPNO]);
THREAD_LEAVE(thread);
PROCESS_LEAVE(proc);
interrupt_set(true);