fixes

kernel/syscalls/vmo.c

@@ -15,8 +15,8 @@
 #include <stdatomic.h>
 
 zn_status_t syscall_vmo_create(struct arch_context* ctx) {
-    size_t length = ctx->ARCH_CTX_A0;
-    __user zn_handle_t* out = (__user zn_handle_t*)ctx->ARCH_CTX_A1;
+    size_t length = ctx->a0;
+    __user zn_handle_t* out = (__user zn_handle_t*)ctx->a1;
 
     // Allocate new VMO.
     struct paged_vmo* vmo;
@@ -43,9 +43,9 @@ zn_status_t syscall_vmo_create(struct arch_context* ctx) {
 }
 
 zn_status_t syscall_vmo_create_phys(struct arch_context* ctx) {
-    uintptr_t addr = ctx->ARCH_CTX_A0;
-    size_t length = ctx->ARCH_CTX_A1;
-    __user zn_handle_t* out = (__user zn_handle_t*)ctx->ARCH_CTX_A2;
+    uintptr_t addr = ctx->a0;
+    size_t length = ctx->a1;
+    __user zn_handle_t* out = (__user zn_handle_t*)ctx->a2;
 
     struct vmo* vmo;
     zn_status_t status = vmo_new_phys_range(addr, length, &vmo);
@@ -71,12 +71,12 @@ zn_status_t syscall_vmo_create_phys(struct arch_context* ctx) {
 }
 
 zn_status_t syscall_vmo_map(struct arch_context* ctx) {
-    zn_handle_t vmo_handle = ctx->ARCH_CTX_A0;
-    zn_handle_t vas_handle = ctx->ARCH_CTX_A1;
-    uintptr_t vmo_offset = ctx->ARCH_CTX_A2;
-    __user uintptr_t* addr = (__user uintptr_t*)ctx->ARCH_CTX_A3;
-    size_t bytes = ctx->ARCH_CTX_A4;
-    enum zn_vm_flags flags = ctx->ARCH_CTX_A5;
+    zn_handle_t vmo_handle = ctx->a0;
+    zn_handle_t vas_handle = ctx->a1;
+    uintptr_t vmo_offset = ctx->a2;
+    auto addr = (__user uintptr_t*)ctx->a3;
+    size_t bytes = ctx->a4;
+    enum zn_vm_flags flags = ctx->a5;
 
     struct task* current = percpu_get()->sched.current;
 
@@ -112,8 +112,8 @@ zn_status_t syscall_vmo_map(struct arch_context* ctx) {
 
     // TODO: Use actual allocator for user task.
     if (target_addr == 0) {
-        static uintptr_t map_offset = 0xA000'0000;
-        target_addr = atomic_fetch_add(&map_offset, ALIGN_UP(bytes, arch_mem_page_size()));
+        static _Atomic uintptr_t map_offset = 0xA000'0000;
+        target_addr = atomic_fetch_add((volatile uintptr_t*)&map_offset, ALIGN_UP(bytes, arch_mem_page_size()));
     }
 
     if (addr != nullptr) {