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lirent
b3441dd6f6
CORE (src/core): vmie_mem — guest-physical substrate with a data-driven segment map (replaces the hardcoded 4 GiB PCI-hole topology). ENGINE (src/engine): x86-64 paging + Windows bring-up; produces the generic memory model. HANDLERS (src/handlers): the signature/value/pointer scanners, which now consume an OS-agnostic contract. Keystone: gva_ctx is split into vmie_mem (core) + vmie (engine); the generic access functions take vmie_mem* + cr3 and no longer compile in the Windows offset table. New public contract include/memmodel.h (vmie_mem, mem_view_t, vregion, task, range, the gva_* access); win32 surface in include/vmie.h. Leak relocations: the PE parser, UTF-16 decode and CR3-recovery heuristics move engine-side; the matcher stays a pure, source-agnostic handler, and the pointer scanner takes a generic range[] instead of reaching into the process enumerator.
68 lines
3.2 KiB
C
68 lines
3.2 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 generic memory-model
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* contract (memmodel.h): this is the OS-agnostic scanning surface. Everything
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* here is keyed by a `vmie_mem*` + `cr3` (and, for the pointer scan, a decoded
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* `range[]`); it names no Windows object. The value scanner narrows a candidate
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* set across successive snapshots; the pointer scanner discovers range-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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* The Windows-typed convenience entry points (scan_new(process*),
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* vmie_scan_pointer(process*)) live in the win32 surface (vmie.h).
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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 "memmodel.h" /* vmie_mem, range, vregion */
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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; /* range-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_cr3(vmie_mem* m, 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(vmie_mem* m, uintptr_t cr3, const range* mods, int nmods,
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uint64_t target, int max_depth, uint32_t max_off,
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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 (vmie_mem* m, 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(vmie_mem* m, 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 (vmie_mem* m, 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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/* gva_sig_phys (scan the raw physical image) needs the core segment map, so it
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* is an engine bridge, declared in engine.h - not part of the handler surface. */
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#endif /* VMIE_SCAN_H */
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