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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132// SPDX-License-Identifier: GPL-2.0-or-later
#include "shared.h"
bool fail_prealloc;unsigned long mmap_min_addr = CONFIG_DEFAULT_MMAP_MIN_ADDR;unsigned long dac_mmap_min_addr = CONFIG_DEFAULT_MMAP_MIN_ADDR;unsigned long stack_guard_gap = 256UL<<PAGE_SHIFT;
const struct vm_operations_struct vma_dummy_vm_ops;struct anon_vma dummy_anon_vma;struct task_struct __current;
struct vm_area_struct *alloc_vma(struct mm_struct *mm, unsigned long start, unsigned long end, pgoff_t pgoff, vma_flags_t vma_flags){ struct vm_area_struct *vma = vm_area_alloc(mm);
if (vma == NULL) return NULL;
vma->vm_start = start; vma->vm_end = end; vma->vm_pgoff = pgoff; vma->flags = vma_flags; vma_assert_detached(vma);
return vma;}
void detach_free_vma(struct vm_area_struct *vma){ vma_mark_detached(vma); vm_area_free(vma);}
struct vm_area_struct *alloc_and_link_vma(struct mm_struct *mm, unsigned long start, unsigned long end, pgoff_t pgoff, vma_flags_t vma_flags){ struct vm_area_struct *vma = alloc_vma(mm, start, end, pgoff, vma_flags);
if (vma == NULL) return NULL;
if (attach_vma(mm, vma)) { detach_free_vma(vma); return NULL; }
/* * Reset this counter which we use to track whether writes have * begun. Linking to the tree will have caused this to be incremented, * which means we will get a false positive otherwise. */ vma->vm_lock_seq = UINT_MAX;
return vma;}
void reset_dummy_anon_vma(void){ dummy_anon_vma.was_cloned = false; dummy_anon_vma.was_unlinked = false;}
int cleanup_mm(struct mm_struct *mm, struct vma_iterator *vmi){ struct vm_area_struct *vma; int count = 0;
fail_prealloc = false; reset_dummy_anon_vma();
vma_iter_set(vmi, 0); for_each_vma(*vmi, vma) { detach_free_vma(vma); count++; }
mtree_destroy(&mm->mm_mt); mm->map_count = 0; return count;}
bool vma_write_started(struct vm_area_struct *vma){ int seq = vma->vm_lock_seq;
/* We reset after each check. */ vma->vm_lock_seq = UINT_MAX;
/* The vma_start_write() stub simply increments this value. */ return seq > -1;}
void __vma_set_dummy_anon_vma(struct vm_area_struct *vma, struct anon_vma_chain *avc, struct anon_vma *anon_vma){ vma->anon_vma = anon_vma; INIT_LIST_HEAD(&vma->anon_vma_chain); list_add(&avc->same_vma, &vma->anon_vma_chain); avc->anon_vma = vma->anon_vma;}
void vma_set_dummy_anon_vma(struct vm_area_struct *vma, struct anon_vma_chain *avc){ __vma_set_dummy_anon_vma(vma, avc, &dummy_anon_vma);}
struct task_struct *get_current(void){ return &__current;}
unsigned long rlimit(unsigned int limit){ return (unsigned long)-1;}
void vma_set_range(struct vm_area_struct *vma, unsigned long start, unsigned long end, pgoff_t pgoff){ vma->vm_start = start; vma->vm_end = end; vma->vm_pgoff = pgoff;}