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fix(ke/um): fix IPL handling

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Loïc Grégoire
2026-03-24 22:22:46 -04:00
parent b89ee0e3e5
commit d59cb46154
1 changed files with 8 additions and 9 deletions
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src/kern/um/impl.zig
+8 -9
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@@ -17,18 +17,19 @@ fn set_signals(enabled: bool) bool {
_ = c.sigfillset(&newmask);
const how = if (enabled) c.SIG_BLOCK else c.SIG_UNBLOCK;
const how = if (enabled) c.SIG_UNBLOCK else c.SIG_BLOCK;
if (c.pthread_sigmask(how, &newmask, &oldmask) != 0) {
ke.panic("pthread_sigmask failed", .{});
}
return std.mem.eql(u8, std.mem.asBytes(&newmask), std.mem.asBytes(&oldmask));
return c.sigismember(&oldmask, c.SIGUSR1) == 0;
}
/// Set the hardware IPL.
pub fn set_hardware_ipl(ipl: ke.Ipl) void {
_ = set_signals(@intFromEnum(ipl) > @intFromEnum(ke.Ipl.get_max_software()));
// This is a no-op since we handle this in enable_interrupts().
_ = ipl;
}
/// Disable interrupts and return the previous state.
@@ -38,16 +39,14 @@ pub fn disable_interrupts() bool {
/// Enable interrupts and return the previous state.
pub fn enable_interrupts() bool {
return set_signals(true);
const ipl_allows_ints = @intFromEnum(ke.curcpu().ipl) <= @intFromEnum(ke.Ipl.get_max_software());
return set_signals(ipl_allows_ints);
}
/// Restore an interrupt state.
pub fn restore_interrupts(val: bool) void {
if (val) {
_ = enable_interrupts();
} else {
_ = disable_interrupts();
}
const ipl_allows_ints = @intFromEnum(ke.curcpu().ipl) <= @intFromEnum(ke.Ipl.get_max_software());
_ = set_signals(val and ipl_allows_ints);
}
pub fn send_resched_ipi(cpu: *ke.Cpu) void {