diff options
Diffstat (limited to 'peloader/pe_linker.c')
| -rw-r--r-- | peloader/pe_linker.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/peloader/pe_linker.c b/peloader/pe_linker.c index f0e4737..aaca663 100644 --- a/peloader/pe_linker.c +++ b/peloader/pe_linker.c @@ -27,6 +27,7 @@ #include <stdint.h> #include <stddef.h> #include <stdbool.h> +#include <limits.h> #include <errno.h> #include <string.h> #include <search.h> @@ -48,6 +49,7 @@ struct pe_exports { static struct pe_exports *pe_exports; static int num_pe_exports; +PKUSER_SHARED_DATA SharedUserData; #define DRIVER_NAME "pelinker" #define RVA2VA(image, rva, type) (type)(ULONG_PTR)((void *)image + rva) @@ -91,6 +93,12 @@ extern struct wrap_export crt_exports[]; uintptr_t LocalStorage[1024] = {0}; +static ULONG TlsBitmapData[32]; +static RTL_BITMAP TlsBitmap = { + .SizeOfBitMap = sizeof(TlsBitmapData) * CHAR_BIT, + .Buffer = (PVOID) &TlsBitmapData[0], +}; + struct hsearch_data extraexports; struct hsearch_data crtexports; @@ -639,6 +647,9 @@ bool pe_load_library(const char *filename, void **image, size_t *size) // code that uses SEH as it accesses it via fs selector. setup_nt_threadinfo(NULL); + // Install a minimal KUSER_SHARED_DATA structure. + setup_kuser_shared_data(); + return true; error: @@ -654,9 +665,13 @@ error: bool setup_nt_threadinfo(PEXCEPTION_HANDLER ExceptionHandler) { static EXCEPTION_FRAME ExceptionFrame; + static PEB ProcessEnvironmentBlock = { + .TlsBitmap = &TlsBitmap, + }; static TEB ThreadEnvironment = { .Tib.Self = &ThreadEnvironment.Tib, .ThreadLocalStoragePointer = LocalStorage, // https://github.com/taviso/loadlibrary/issues/65 + .ProcessEnvironmentBlock = &ProcessEnvironmentBlock, }; struct user_desc pebdescriptor = { .entry_number = -1, @@ -688,3 +703,21 @@ bool setup_nt_threadinfo(PEXCEPTION_HANDLER ExceptionHandler) return true; } + +// Minimal KUSER_SHARED_DATA structure, for those applications that require it. +bool setup_kuser_shared_data(void) +{ + SharedUserData = mmap((PVOID)(MM_SHARED_USER_DATA_VA), + sizeof(KUSER_SHARED_DATA), + PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, + -1, + 0); + + if (SharedUserData == MAP_FAILED) { + DebugLog("failed to map KUSER_SHARED_DATA, %m"); + return false; + } + + return true; +} |