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signal: ucontext and a fix

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Matheus
2024-12-25 20:23:32 -03:00
parent 643876b911
commit 936180e228
4 changed files with 92 additions and 7 deletions
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kernel-src/sys/scheduler/scheduler.c
+9 -3
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@@ -162,7 +162,7 @@ typedef struct {
} checkargs_t;
// SHOULD NOT BE CALLED WITH THE SCHEDULER STACK
static void userspacecheck(void *_args) {
static bool userspacecheck(void *_args) {
checkargs_t *args = _args;
thread_t *thread = current_thread();
@@ -171,7 +171,10 @@ static void userspacecheck(void *_args) {
sched_threadexit();
}
while (signal_check(thread, args->context, args->syscall, args->syscallret, args->syscallerrno)) ;
bool need_context_switch = false;
while (signal_check(thread, args->context, args->syscall, args->syscallret, args->syscallerrno, &need_context_switch)) ;
return need_context_switch;
}
static void checktrampoline(context_t *context, void *_args) {
@@ -203,7 +206,10 @@ __attribute__((no_caller_saved_registers)) void sched_userspacecheck(context_t *
if (&args < (checkargs_t *)current_cpu()->schedulerstack && &args >= (checkargs_t *)((uintptr_t)current_cpu()->schedulerstack - SCHEDULER_STACK_SIZE)) {
arch_context_saveandcall(checktrampoline, current_thread()->kernelstacktop, &args);
} else {
userspacecheck(&args);
if (userspacecheck(&args)) {
// need context switch
arch_context_switch(context);
}
}
current_cpu()->intstatus = intstatus;