diff options
| author | Diego Nieto Cid <dnietoc@gmail.com> | 2025-09-21 21:23:42 +0100 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2025-09-22 00:51:29 +0200 |
| commit | 9ae4d99c1d1e7c9c0977cebb4df9b86fa92cca94 (patch) | |
| tree | 62e1baaaefde974b943755eb8771ad0a2ca182f4 /vm/vm_kern.c | |
| parent | 1269629d90b28a23ef9742645cfaf657ea3165bb (diff) | |
* doc/mach.texi: add a "Memory Limitations" section to document the new interfaces.
* include/mach/gnumach.defs: (vm_set_size_limit) new routine
(vm_get_size_limit) likewise
* kern/task.c: (task_create_kernel) if parent_task is not null copy virtual memory limit
* tests/test-vm.c: (test_vm_limit) add test for the new routines
* vm/vm_map.h: (struct vm_map) new fields size_none, size_cur_limit and size_max_limit
(vm_map_find_entry) add new parameters cur_protection and max_protection
* vm/vm_map.c: (vm_map_setup) initialize new fields
(vm_map_enforce_limit) new function
(vm_map_copy_limits) new function
(vm_map_find_entry) add protection and max_protection parameters.
call limit enforcer function
(vm_map_enter) likewise
(vm_map_copyout) likewise
(vm_map_copyout_page_list) likewise
(vm_map_fork) copy parent limit to the new map and compute and set size_none of the new map
* vm/vm_user.c: (vm_set_size_limit) new function
(vm_get_size_limit) likewise
* xen/grant.c: update call to vm_map_find_entry to pass protection parameters
Message-ID: <0b71f4f89b7cc2b159893a805480d7493d522d60.1758485757.git.dnietoc@gmail.com>
Diffstat (limited to 'vm/vm_kern.c')
| -rw-r--r-- | vm/vm_kern.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/vm/vm_kern.c b/vm/vm_kern.c index 51223d98..37185687 100644 --- a/vm/vm_kern.c +++ b/vm/vm_kern.c @@ -108,7 +108,8 @@ projected_buffer_allocate( vm_map_lock(kernel_map); kr = vm_map_find_entry(kernel_map, &addr, size, (vm_offset_t) 0, - VM_OBJECT_NULL, &k_entry); + VM_OBJECT_NULL, &k_entry, + VM_PROT_DEFAULT, VM_PROT_ALL); if (kr != KERN_SUCCESS) { vm_map_unlock(kernel_map); vm_object_deallocate(object); @@ -125,7 +126,8 @@ projected_buffer_allocate( vm_map_lock(map); kr = vm_map_find_entry(map, &addr, size, (vm_offset_t) 0, - VM_OBJECT_NULL, &u_entry); + VM_OBJECT_NULL, &u_entry, + protection, protection); if (kr != KERN_SUCCESS) { vm_map_unlock(map); vm_map_lock(kernel_map); @@ -141,8 +143,6 @@ projected_buffer_allocate( /*Creates coupling with kernel mapping of the buffer, and also guarantees that user cannot directly manipulate buffer VM entry*/ - u_entry->protection = protection; - u_entry->max_protection = protection; u_entry->inheritance = inheritance; vm_map_unlock(map); *user_p = addr; @@ -209,7 +209,8 @@ projected_buffer_map( vm_map_lock(map); kr = vm_map_find_entry(map, &user_addr, size, (vm_offset_t) 0, - VM_OBJECT_NULL, &u_entry); + VM_OBJECT_NULL, &u_entry, + protection, protection); if (kr != KERN_SUCCESS) { vm_map_unlock(map); return kr; @@ -222,8 +223,6 @@ projected_buffer_map( /*Creates coupling with kernel mapping of the buffer, and also guarantees that user cannot directly manipulate buffer VM entry*/ - u_entry->protection = protection; - u_entry->max_protection = protection; u_entry->inheritance = inheritance; u_entry->wired_count = k_entry->wired_count; vm_map_unlock(map); @@ -393,7 +392,8 @@ kmem_alloc( retry: vm_map_lock(map); kr = vm_map_find_entry(map, &addr, size, (vm_offset_t) 0, - VM_OBJECT_NULL, &entry); + VM_OBJECT_NULL, &entry, + VM_PROT_DEFAULT, VM_PROT_ALL); if (kr != KERN_SUCCESS) { vm_map_unlock(map); @@ -465,7 +465,8 @@ kmem_valloc( retry: vm_map_lock(map); kr = vm_map_find_entry(map, &addr, size, (vm_offset_t) 0, - kernel_object, &entry); + kernel_object, &entry, + VM_PROT_DEFAULT, VM_PROT_ALL); if (kr != KERN_SUCCESS) { vm_map_unlock(map); @@ -585,7 +586,8 @@ kmem_alloc_aligned( retry: vm_map_lock(map); kr = vm_map_find_entry(map, &addr, size, size - 1, - kernel_object, &entry); + kernel_object, &entry, + VM_PROT_DEFAULT, VM_PROT_ALL); if (kr != KERN_SUCCESS) { vm_map_unlock(map); |