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syms.h
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syms.h
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#pragma once
#include <linux/ptrace.h>
#include <linux/mman.h>
#include <linux/blkdev.h>
#include <linux/mmu_notifier.h>
#define MMU_GATHER_BUNDLE 8
struct mmu_gather_batch {
struct mmu_gather_batch *next;
unsigned int nr;
unsigned int max;
struct page *pages[0];
};
struct mmu_gather {
struct mm_struct *mm;
#ifdef CONFIG_MMU_GATHER_TABLE_FREE
struct mmu_table_batch *batch;
#endif
unsigned long start;
unsigned long end;
/*
* we are in the middle of an operation to clear
* a full mm and can make some optimizations
*/
unsigned int fullmm : 1;
/*
* we have performed an operation which
* requires a complete flush of the tlb
*/
unsigned int need_flush_all : 1;
/*
* we have removed page directories
*/
unsigned int freed_tables : 1;
/*
* at which levels have we cleared entries?
*/
unsigned int cleared_ptes : 1;
unsigned int cleared_pmds : 1;
unsigned int cleared_puds : 1;
unsigned int cleared_p4ds : 1;
/*
* tracks VM_EXEC | VM_HUGETLB in tlb_start_vma
*/
unsigned int vma_exec : 1;
unsigned int vma_huge : 1;
unsigned int batch_count;
#ifndef CONFIG_MMU_GATHER_NO_GATHER
struct mmu_gather_batch *active;
struct mmu_gather_batch local;
struct page *__pages[MMU_GATHER_BUNDLE];
#ifdef CONFIG_MMU_GATHER_PAGE_SIZE
unsigned int page_size;
#endif
#endif
};
/* ================================ START needed symbols/functions ================================ */
extern void mmput(struct mm_struct *mm);
extern void kfree(const void *x);
extern ssize_t import_iovec(int type, const struct iovec *uvec, unsigned int nr_segs, unsigned int fast_segs, struct iovec **iovp, struct iov_iter *i);
typedef struct mm_struct *(*mm_access_t)(struct task_struct *task, unsigned int mode);
extern mm_access_t mm_access_sym;
typedef void (*zap_page_range_t)(struct vm_area_struct *vma, unsigned long start, unsigned long size);
extern zap_page_range_t zap_page_range_sym;
typedef int (*soft_offline_page_t)(unsigned long pfn, int flags);
extern soft_offline_page_t soft_offline_page_sym;
typedef struct vm_area_struct * (*find_vma_prev_t)(struct mm_struct * mm, unsigned long addr, struct vm_area_struct **pprev);
extern find_vma_prev_t find_vma_prev_sym;
typedef struct task_struct *(*pidfd_get_task_t)(int pidfd, unsigned int *flags);
extern pidfd_get_task_t pidfd_get_task_sym;
typedef void (*lru_add_drain_t)(void);
extern lru_add_drain_t lru_add_drain_sym;
typedef void (*tlb_finish_mmu_t)(struct mmu_gather *tlb);
extern tlb_finish_mmu_t tlb_finish_mmu_sym;
typedef int (*__mmu_notifier_invalidate_range_start_t)(struct mmu_notifier_range *range);
extern __mmu_notifier_invalidate_range_start_t __mmu_notifier_invalidate_range_start_sym;
typedef void (*__mmu_notifier_invalidate_range_end_t)(struct mmu_notifier_range *range, bool only_end);
extern __mmu_notifier_invalidate_range_end_t __mmu_notifier_invalidate_range_end_sym;
typedef void (*tlb_gather_mmu_t)(struct mmu_gather *tlb, struct mm_struct *mm);
extern tlb_gather_mmu_t tlb_gather_mmu_sym;
typedef void (*unmap_single_vma_t)(struct mmu_gather *tlb, struct vm_area_struct *vma, unsigned long start_addr, unsigned long end_addr, struct zap_details *details);
extern unmap_single_vma_t unmap_single_vma_sym;
static inline bool can_madv_lru_vma(struct vm_area_struct *vma)
{
return !(vma->vm_flags & (VM_LOCKED|VM_HUGETLB|VM_PFNMAP));
}
/* ================================ END needed symbols/functions ================================ */
asmlinkage ssize_t hooked_process_madvise(struct pt_regs *regs);