From 0d8da6f5436874c1dd987b53d11a3d3aea468f67 Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Tue, 16 Apr 2024 20:10:07 -0400
Subject: kernel: vm_map: Add mmap() and munmap()

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 sys/kern/kern_sched.c   | 10 ++++++++++
 sys/kern/kern_syscall.c |  3 +++
 2 files changed, 13 insertions(+)

(limited to 'sys/kern')

diff --git a/sys/kern/kern_sched.c b/sys/kern/kern_sched.c
index 877c55d..214032a 100644
--- a/sys/kern/kern_sched.c
+++ b/sys/kern/kern_sched.c
@@ -265,6 +265,10 @@ sched_create_td(uintptr_t rip, char *argvp[], char *envp[], struct auxval auxv,
     td->tf = tf;
     td->addrsp = vas;
     td->is_user = is_user;
+    for (size_t i = 0; i < MTAB_ENTRIES; ++i) {
+        /* Init the memory mapping table */
+        TAILQ_INIT(&td->mapspace.mtab[i]);
+    }
     if (prog_range != NULL) {
         memcpy(exec_range, prog_range, sizeof(struct vm_range));
     }
@@ -288,6 +292,7 @@ static void
 sched_destroy_td(struct proc *td)
 {
     const struct vm_range *stack_range = &td->addr_range[ADDR_RANGE_STACK];
+    vm_mapq_t *mapq;
 
     processor_free_pcb(td);
 
@@ -308,6 +313,11 @@ sched_destroy_td(struct proc *td)
         fd_close_fdnum(td, i);
     }
 
+    for (size_t i = 0; i < MTAB_ENTRIES; ++i) {
+        mapq = &td->mapspace.mtab[i];
+        vm_free_mapq(mapq);
+    }
+
     pmap_free_vas(vm_get_ctx(), td->addrsp);
     dynfree(td);
 }
diff --git a/sys/kern/kern_syscall.c b/sys/kern/kern_syscall.c
index a630195..b4a86f3 100644
--- a/sys/kern/kern_syscall.c
+++ b/sys/kern/kern_syscall.c
@@ -32,6 +32,7 @@
 #include <sys/cdefs.h>
 #include <sys/types.h>
 #include <sys/filedesc.h>
+#include <vm/map.h>
 
 __noreturn static uint64_t
 sys_exit(struct syscall_args *args)
@@ -47,4 +48,6 @@ uint64_t(*g_syscall_table[__MAX_SYSCALLS])(struct syscall_args *args) = {
     sys_close,
     sys_read,
     sys_lseek,
+    sys_mmap,
+    sys_munmap
 };
-- 
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