kern/amd64: proc: Add proc_kill() routine

Add a new function to kill processes and clean them up. They will then
be marked as EXITING and it is up to the parent to do the rest.

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 40 insertions, 0 deletions

diff --git a/src/sys/arch/amd64/os/os_proc.c b/src/sys/arch/amd64/os/os_proc.c
index 8c7b6f3..1064c10 100644
--- a/src/sys/arch/amd64/os/os_proc.c
+++ b/src/sys/arch/amd64/os/os_proc.c
@@ -39,6 +39,8 @@
 #include <machine/lapic.h>
 #include <string.h>
 
+extern struct proc g_rootproc;
+
 /*
  * Put the current process into userland for its first
  * run. The catch is that we have never been in userland
@@ -212,3 +214,41 @@ done:
     lapic_eoi();
     lapic_timer_oneshot_us(SCHED_QUANTUM);
 }
+
+/*
+ * Commit procedural murder
+ */
+int
+md_proc_kill(struct proc *procp, int flags)
+{
+    struct proc *self;
+    struct pcore *core = this_core();
+    struct md_pcb *pcbp;
+
+    if (core == NULL) {
+        return -ENXIO;
+    }
+
+    /* Default to ourself */
+    if (procp == NULL) {
+        procp = core->curproc;
+    }
+
+    /* Release the VAS */
+    pcbp = &procp->pcb;
+    mmu_free_vas(&pcbp->vas);
+
+    /* Sanity check */
+    if ((self = core->curproc) == NULL) {
+        printf("kill: could not get self, using rootproc\n");
+        self = &g_rootproc;
+    }
+
+    /* If this is us, spin time */
+    if (self->pid == procp->pid) {
+        core->curproc = NULL;
+        md_proc_yield();
+    }
+
+    return 0;
+}