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Kernel+Userland: Addd reboot syscall (#334)

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Rolling with the theme of adding a dialog to shutdown the machine, it is
probably nice to have a way to reboot the machine without performing a full
system powerdown.

A reboot program has been added to `/bin/` as well as a corresponding
`syscall` (SC_reboot). This syscall works by attempting to pulse the 8042
keyboard controller. Note that this is NOT supported on  new machines, and
should only be a fallback until we have proper ACPI support.

The implementation causes a triple fault in QEMU, which then restarts the
system. The filesystems are locked and synchronized before this occurs,
so there shouldn't be any corruption etctera.
This commit is contained in:
Jesse 2019-07-19 17:58:12 +10:00 • committed by Andreas Kling
parent 23d45532fc
commit a27c9e3e01
7 changed files with 45 additions and 2 deletions
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6
Libraries/LibC/unistd.cpp
View file

@ -514,4 +514,10 @@ int fsync(int fd)
dbgprintf("FIXME: Implement fsync()\n");
return 0;
}
int reboot()
{
int rc = syscall(SC_reboot);
__RETURN_WITH_ERRNO(rc, rc, -1);
}
}