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https://dev.lirent.ru/Vatrog/vm-introspection-engine.git
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lirent
7c0995a4f2
Library vmie (libvmie.a), CLI vmie_cli, guest agent vmie-startup.exe, symbol prefix VMIE_ (header guards, the LTO build option). No behavior change.
64 lines
3.1 KiB
C
64 lines
3.1 KiB
C
/* scan.h - typed value scanner, pointer scanner, and gva<->signature bridges.
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*
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* Layered above the pure matcher (sigscan.h) and the gva core (include.h): this
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* is the gva-bound scanning surface. The value scanner narrows a candidate set
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* across successive snapshots; the pointer scanner discovers module-anchored
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* pointer chains; the gva_sig_* bridges build mem_view_t windows out of guest
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* memory and feed them to the signature matcher.
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*/
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#ifndef VMIE_SCAN_H
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#define VMIE_SCAN_H
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#include <stdint.h>
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#include <stddef.h>
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#include "include.h" /* gva_ctx, process (vregion - internal) */
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#include "sigscan.h" /* mem_view_t, sig_pattern_t */
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/* typed value scanner. ENUMERATOR ORDER IS LOAD-BEARING: scan.c indexes the
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* table g_tsz[] = {1,2,4,8, 1,2,4,8, 4,8, 2} by these values - do not reorder
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* without updating scan.c. */
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typedef enum {
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SCAN_I8, SCAN_I16, SCAN_I32, SCAN_I64, /* signed */
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SCAN_U8, SCAN_U16, SCAN_U32, SCAN_U64, /* unsigned */
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SCAN_F32, SCAN_F64, SCAN_F16 /* float */
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} scan_type;
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typedef enum {
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SCAN_EQ, SCAN_NEQ, SCAN_GT, SCAN_LT, /* require a value argument */
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SCAN_INC, SCAN_DEC, SCAN_CHANGED, SCAN_UNCHANGED /* relative to the previous snapshot */
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} scan_op;
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typedef struct scan scan; /* opaque session */
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typedef struct { uint64_t addr; uint64_t value; } scan_hit;
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#define SCAN_PTR_MAXDEPTH 8 /* DFS depth and size of off[] */
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typedef struct {
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uint64_t base; /* module-anchored base address */
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int depth; /* number of offsets in off[] */
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int32_t off[SCAN_PTR_MAXDEPTH]; /* dereference chain */
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} scan_ptr_path;
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scan* scan_new(gva_ctx* ctx, const process* pr, scan_type t, const void* value,
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int be, int aligned, uint64_t lo, uint64_t hi);
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scan* scan_new_cr3(gva_ctx* ctx, uintptr_t cr3, scan_type t, const void* value,
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int be, int aligned, uint64_t lo, uint64_t hi);
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int64_t scan_next(scan* s, scan_op op, const void* value);
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int64_t scan_count(scan* s);
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int scan_results(scan* s, uint64_t offset, int max, scan_hit* out);
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void scan_free(scan* s);
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int scan_pointer(gva_ctx* ctx, const process* pr, uint64_t target,
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int max_depth, uint32_t max_off, scan_ptr_path* out, int max);
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/* gva bridges to the signature matcher: build mem_view from guest memory and feed sigscan.h */
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int gva_sig_scan (gva_ctx* ctx, uintptr_t cr3, uint64_t lo, uint64_t hi,
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uint32_t prot_any, const sig_pattern_t* p, uint64_t* out, int max);
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int gva_sig_first(gva_ctx* ctx, uintptr_t cr3, uint64_t lo, uint64_t hi,
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uint32_t prot_any, const sig_pattern_t* p, uint64_t* va);
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int gva_sig_rip (gva_ctx* ctx, uintptr_t cr3, uint64_t hit_va,
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size_t disp_off, size_t instr_len, uint64_t* target);
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int gva_pe_section(gva_ctx* ctx, uintptr_t cr3, uint64_t module_base,
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const char* name, uint8_t* buf, size_t bufcap, mem_view_t* out);
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int gva_sig_phys (gva_ctx* ctx, const sig_pattern_t* p, uint64_t* out, int max);
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#endif /* VMIE_SCAN_H */
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