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refactor(il2cpp): use memkit_xdl wrappers instead of raw xdl calls #2

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Merged
HanSoBored merged 1 commit into from
Apr 8, 2026
Merged

refactor(il2cpp): use memkit_xdl wrappers instead of raw xdl calls #2

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18 changes: 18 additions & 0 deletions include/memkit.h
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Original file line number Diff line number Diff line change
Expand Up @@ -167,6 +167,24 @@ typedef struct {
*/
typedef struct memkit_addr_ctx memkit_addr_ctx_t;

// ============================================================================
// XDL FLAG CONSTANTS
// ============================================================================

/* memkit_xdl_open() flags */
#define XDL_DEFAULT 0x00
#define XDL_TRY_FORCE_LOAD 0x01
#define XDL_ALWAYS_FORCE_LOAD 0x02

/* memkit_xdl_addr_to_symbol4() flags */
#define XDL_NON_SYM 0x01

/* memkit_xdl_iterate() flags */
#define XDL_FULL_PATHNAME 0x01

/* xdl_dlinfo() selector */
#define XDL_DI_DLINFO 1

// ============================================================================
// XDL WRAPPER API - PHASE 1: CORE DISCOVERY
// ============================================================================
Expand Down
15 changes: 7 additions & 8 deletions src/il2cpp.c
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Expand Up @@ -5,7 +5,6 @@
#include <stdatomic.h>

#include "memkit.h"
#include "xdl.h"

// ============================================================================
// IL2CPP: STATIC STATE (Thread-Safe via C11 Atomics)
Expand All @@ -21,10 +20,10 @@ static atomic_bool g_initialized = ATOMIC_VAR_INIT(false);
bool memkit_il2cpp_init(void) {
bool expected = false;

// Only the first thread (CAS succeeds) executes xdl_open
// Only the first thread (CAS succeeds) executes memkit_xdl_open
// atomic_compare_exchange_strong: 100% thread-safe, lock-free
if (atomic_compare_exchange_strong(&g_initialized, &expected, true)) {
g_il2cpp_handle = xdl_open("libil2cpp.so", XDL_DEFAULT);
g_il2cpp_handle = memkit_xdl_open("libil2cpp.so", XDL_DEFAULT);
}

// Wait briefly if another thread is still opening the handle (rare case)
Expand Down Expand Up @@ -60,16 +59,16 @@ void* memkit_il2cpp_resolve(const char* symbol_name) {

// If handle is NULL, try to open directly
if (!g_il2cpp_handle) {
g_il2cpp_handle = xdl_open("libil2cpp.so", XDL_DEFAULT);
g_il2cpp_handle = memkit_xdl_open("libil2cpp.so", XDL_DEFAULT);
if (!g_il2cpp_handle) {
return NULL;
}
}

// Resolve the symbol using XDL
// xdl_sym searches in .dynsym (dynamic symbol table)
// memkit_xdl_sym searches in .dynsym (dynamic symbol table)
// This is where most exported functions live
return xdl_sym(g_il2cpp_handle, symbol_name, NULL);
return memkit_xdl_sym(g_il2cpp_handle, symbol_name, NULL);
}

// ============================================================================
Expand All @@ -89,10 +88,10 @@ void* memkit_il2cpp_resolve_symtab(const char* symbol_name) {
return NULL;
}

// Use xdl_dsym to search only in .symtab section
// Use memkit_xdl_dsym to search only in .symtab section
// This is useful for:
// - Stripped symbols
// - Internal/private functions
// - Debug symbols
return xdl_dsym(g_il2cpp_handle, symbol_name, NULL);
return memkit_xdl_dsym(g_il2cpp_handle, symbol_name, NULL);
}
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