120 lines
2.7 KiB
C
120 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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#pragma once
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/*
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* Contains declarations that exist in the kernel which have been CUSTOMISED for
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* testing purposes to faciliate userland VMA testing.
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*/
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#ifdef CONFIG_MMU
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extern unsigned long mmap_min_addr;
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extern unsigned long dac_mmap_min_addr;
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#else
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#define mmap_min_addr 0UL
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#define dac_mmap_min_addr 0UL
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#endif
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#define VM_WARN_ON(_expr) (WARN_ON(_expr))
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#define VM_WARN_ON_ONCE(_expr) (WARN_ON_ONCE(_expr))
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#define VM_WARN_ON_VMG(_expr, _vmg) (WARN_ON(_expr))
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#define VM_BUG_ON(_expr) (BUG_ON(_expr))
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#define VM_BUG_ON_VMA(_expr, _vma) (BUG_ON(_expr))
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/* We hardcode this for now. */
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#define sysctl_max_map_count 0x1000000UL
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#define TASK_SIZE ((1ul << 47)-PAGE_SIZE)
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/*
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* The shared stubs do not implement this, it amounts to an fprintf(STDERR,...)
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* either way :)
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*/
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#define pr_warn_once pr_err
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#define pgtable_supports_soft_dirty() 1
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struct anon_vma {
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struct anon_vma *root;
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struct rb_root_cached rb_root;
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/* Test fields. */
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bool was_cloned;
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bool was_unlinked;
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};
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static inline void unlink_anon_vmas(struct vm_area_struct *vma)
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{
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/* For testing purposes, indicate that the anon_vma was unlinked. */
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vma->anon_vma->was_unlinked = true;
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}
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static inline void vma_start_write(struct vm_area_struct *vma)
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{
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/* Used to indicate to tests that a write operation has begun. */
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vma->vm_lock_seq++;
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}
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static inline __must_check
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int vma_start_write_killable(struct vm_area_struct *vma)
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{
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/* Used to indicate to tests that a write operation has begun. */
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vma->vm_lock_seq++;
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return 0;
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}
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static inline int anon_vma_clone(struct vm_area_struct *dst, struct vm_area_struct *src,
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enum vma_operation operation)
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{
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/* For testing purposes. We indicate that an anon_vma has been cloned. */
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if (src->anon_vma != NULL) {
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dst->anon_vma = src->anon_vma;
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dst->anon_vma->was_cloned = true;
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}
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return 0;
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}
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static inline int __anon_vma_prepare(struct vm_area_struct *vma)
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{
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struct anon_vma *anon_vma = calloc(1, sizeof(struct anon_vma));
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if (!anon_vma)
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return -ENOMEM;
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anon_vma->root = anon_vma;
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vma->anon_vma = anon_vma;
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return 0;
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}
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static inline int anon_vma_prepare(struct vm_area_struct *vma)
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{
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if (likely(vma->anon_vma))
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return 0;
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return __anon_vma_prepare(vma);
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}
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static inline void vma_lock_init(struct vm_area_struct *vma, bool reset_refcnt)
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{
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if (reset_refcnt)
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refcount_set(&vma->vm_refcnt, 0);
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}
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static inline vma_flags_t __mk_vma_flags(size_t count, const vma_flag_t *bits)
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{
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vma_flags_t flags;
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int i;
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/*
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* For testing purposes: allow invalid bit specification so we can
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* easily test.
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*/
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vma_flags_clear_all(&flags);
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for (i = 0; i < count; i++)
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if (bits[i] < NUM_VMA_FLAG_BITS)
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vma_flag_set(&flags, bits[i]);
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return flags;
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}
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