diff options
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/kern/kern_exit.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/sys/kern/kern_exit.c b/sys/kern/kern_exit.c index 04490b0..3f8f17e 100644 --- a/sys/kern/kern_exit.c +++ b/sys/kern/kern_exit.c @@ -29,9 +29,43 @@ #include <sys/proc.h> #include <sys/sched.h> +#include <sys/syslog.h> #include <vm/physmem.h> #include <vm/dynalloc.h> #include <vm/vm.h> +#include <vm/map.h> +#include <machine/pcb.h> + +#define pr_trace(fmt, ...) kprintf("exit: " fmt, ##__VA_ARGS__) +#define pr_error(...) pr_trace(__VA_ARGS__) + +static void +unload_td(struct proc *td) +{ + const struct auxval *auxvalp; + struct exec_prog *execp; + struct exec_range *range; + struct pcb *pcbp; + size_t len; + + execp = &td->exec; + auxvalp = &execp->auxval; + pcbp = &td->pcb; + + for (size_t i = 0; i < auxvalp->at_phnum; ++i) { + range = &execp->loadmap[i]; + len = (range->end - range->start); + + /* Attempt to unmap the range */ + if (vm_unmap(pcbp->addrsp, range->vbase, len) != 0) { + pr_error("Failed to unmap %p - %p (pid=%d)\n", + range->start, range->end, td->pid); + } + + /* Free the physical memory */ + vm_free_frame(range->start, len / DEFAULT_PAGESIZE); + } +} /* * Kill a thread and deallocate its resources. @@ -63,7 +97,10 @@ exit1(struct proc *td) stack -= VM_HIGHER_HALF; } + unload_td(td); + vm_unmap(pcbp->addrsp, td->stack_base, PROC_STACK_SIZE); vm_free_frame(stack, PROC_STACK_PAGES); + pmap_destroy_vas(pcbp->addrsp); dynfree(td); |