Alexandre Julliard : kernelbase: Make memory writable in WriteProcessMemory if necessary.
Module: wine Branch: master Commit: 6ea77ec0864eb7870ce3418bf828077c2a072413 URL: https://gitlab.winehq.org/wine/wine/-/commit/6ea77ec0864eb7870ce3418bf828077...
Author: Alexandre Julliard julliard@winehq.org Date: Tue Jun 18 12:08:03 2024 +0200
kernelbase: Make memory writable in WriteProcessMemory if necessary.
---
dlls/kernel32/tests/virtual.c | 2 -- dlls/kernelbase/memory.c | 44 ++++++++++++++++++++++++++++++++++++++++++- dlls/ntdll/tests/wow64.c | 2 +- include/winnt.h | 40 ++++++++++++++++++++++++++++----------- 4 files changed, 73 insertions(+), 15 deletions(-)
diff --git a/dlls/kernel32/tests/virtual.c b/dlls/kernel32/tests/virtual.c index 86cd3bc9015..5fa8a1b5266 100644 --- a/dlls/kernel32/tests/virtual.c +++ b/dlls/kernel32/tests/virtual.c @@ -206,10 +206,8 @@ static void test_VirtualAllocEx(void) ok( b, "VirtualProtectEx, error %lu\n", GetLastError() ); bytes_written = 0xdeadbeef; b = WriteProcessMemory(hProcess, addr1, src, alloc_size, &bytes_written); - todo_wine ok( !b, "WriteProcessMemory succeeded\n" ); if (!b) ok( GetLastError() == ERROR_NOACCESS, "wrong error %lu\n", GetLastError() ); - todo_wine ok( bytes_written == 0xdeadbeef, "%Iu bytes written\n", bytes_written ); status = pNtWriteVirtualMemory( hProcess, addr1, src, alloc_size, &bytes_written ); todo_wine diff --git a/dlls/kernelbase/memory.c b/dlls/kernelbase/memory.c index 4f4bba9a13b..d552e5b81d8 100644 --- a/dlls/kernelbase/memory.c +++ b/dlls/kernelbase/memory.c @@ -46,6 +46,9 @@ WINE_DECLARE_DEBUG_CHANNEL(globalmem); * Virtual memory functions ***********************************************************************/
+static const SIZE_T page_mask = 0xfff; +#define ROUND_ADDR(addr) ((void *)((UINT_PTR)(addr) & ~page_mask)) +#define ROUND_SIZE(addr,size) (((SIZE_T)(size) + ((UINT_PTR)(addr) & page_mask) + page_mask) & ~page_mask)
/*********************************************************************** * DiscardVirtualMemory (kernelbase.@) @@ -537,7 +540,46 @@ BOOL WINAPI DECLSPEC_HOTPATCH VirtualUnlock( void *addr, SIZE_T size ) BOOL WINAPI DECLSPEC_HOTPATCH WriteProcessMemory( HANDLE process, void *addr, const void *buffer, SIZE_T size, SIZE_T *bytes_written ) { - return set_ntstatus( NtWriteVirtualMemory( process, addr, buffer, size, bytes_written )); + DWORD old_prot, prot = PAGE_TARGETS_NO_UPDATE | PAGE_ENCLAVE_NO_CHANGE | PAGE_EXECUTE_WRITECOPY; + MEMORY_BASIC_INFORMATION info; + void *base_addr; + SIZE_T region_size; + NTSTATUS status; + + if (!VirtualQueryEx( process, addr, &info, sizeof(info) )) return FALSE; + + switch (info.Protect) + { + case PAGE_READWRITE: + case PAGE_WRITECOPY: + case PAGE_EXECUTE_READWRITE: + case PAGE_EXECUTE_WRITECOPY: + /* already writable */ + if ((status = NtWriteVirtualMemory( process, addr, buffer, size, bytes_written ))) break; + NtFlushInstructionCache( process, addr, size ); + break; + + case PAGE_EXECUTE: + case PAGE_EXECUTE_READ: + /* make it writable */ + base_addr = ROUND_ADDR( addr ); + region_size = ROUND_SIZE( addr, size ); + region_size = min( region_size, (char *)info.BaseAddress + info.RegionSize - (char *)base_addr ); + status = NtProtectVirtualMemory( process, &base_addr, ®ion_size, prot, &old_prot ); + if (status) break; + status = NtWriteVirtualMemory( process, addr, buffer, size, bytes_written ); + if (!status) NtFlushInstructionCache( process, addr, size ); + prot = PAGE_TARGETS_NO_UPDATE | PAGE_ENCLAVE_NO_CHANGE | old_prot; + NtProtectVirtualMemory( process, &base_addr, ®ion_size, prot, &old_prot ); + break; + + default: + /* not writable */ + status = STATUS_ACCESS_VIOLATION; + break; + } + + return set_ntstatus( status ); }
diff --git a/dlls/ntdll/tests/wow64.c b/dlls/ntdll/tests/wow64.c index 77f6f304289..a8849ae5633 100644 --- a/dlls/ntdll/tests/wow64.c +++ b/dlls/ntdll/tests/wow64.c @@ -729,7 +729,7 @@ static void test_cross_process_notifications( HANDLE process, ULONG_PTR section,
WriteProcessMemory( process, (char *)addr + 0x1ffe, data, sizeof(data), &size ); entry = pop_from_work_list( &list->work_list ); - todo_wine + todo_wine_if (current_machine == IMAGE_FILE_MACHINE_ARM64) { entry = expect_cross_work_entry( list, entry, CrossProcessPreVirtualProtect, (char *)addr + 0x1000, 0x2000, 0x60000000 | PAGE_EXECUTE_WRITECOPY, diff --git a/include/winnt.h b/include/winnt.h index b18d255a79c..c4749bf7028 100644 --- a/include/winnt.h +++ b/include/winnt.h @@ -815,17 +815,35 @@ typedef struct DECLSPEC_ALIGN(8) MEM_EXTENDED_PARAMETER { #define MEM_EXTENDED_PARAMETER_EC_CODE 0x00000040 #define MEM_EXTENDED_PARAMETER_IMAGE_NO_HPAT 0x00000080
-#define PAGE_NOACCESS 0x01 -#define PAGE_READONLY 0x02 -#define PAGE_READWRITE 0x04 -#define PAGE_WRITECOPY 0x08 -#define PAGE_EXECUTE 0x10 -#define PAGE_EXECUTE_READ 0x20 -#define PAGE_EXECUTE_READWRITE 0x40 -#define PAGE_EXECUTE_WRITECOPY 0x80 -#define PAGE_GUARD 0x100 -#define PAGE_NOCACHE 0x200 -#define PAGE_WRITECOMBINE 0x400 +#define PAGE_NOACCESS 0x00000001 +#define PAGE_READONLY 0x00000002 +#define PAGE_READWRITE 0x00000004 +#define PAGE_WRITECOPY 0x00000008 +#define PAGE_EXECUTE 0x00000010 +#define PAGE_EXECUTE_READ 0x00000020 +#define PAGE_EXECUTE_READWRITE 0x00000040 +#define PAGE_EXECUTE_WRITECOPY 0x00000080 +#define PAGE_GUARD 0x00000100 +#define PAGE_NOCACHE 0x00000200 +#define PAGE_WRITECOMBINE 0x00000400 +#define PAGE_GRAPHICS_NOACCESS 0x00000800 +#define PAGE_GRAPHICS_READONLY 0x00001000 +#define PAGE_GRAPHICS_READWRITE 0x00002000 +#define PAGE_GRAPHICS_EXECUTE 0x00004000 +#define PAGE_GRAPHICS_EXECUTE_READ 0x00008000 +#define PAGE_GRAPHICS_EXECUTE_READWRITE 0x00010000 +#define PAGE_GRAPHICS_COHERENT 0x00020000 +#define PAGE_GRAPHICS_NOCACHE 0x00040000 +#define PAGE_ENCLAVE_MASK 0x10000000 +#define PAGE_ENCLAVE_UNVALIDATED 0x20000000 +#define PAGE_ENCLAVE_NO_CHANGE 0x20000000 +#define PAGE_TARGETS_NO_UPDATE 0x40000000 +#define PAGE_TARGETS_INVALID 0x40000000 +#define PAGE_REVERT_TO_FILE_MAP 0x80000000 +#define PAGE_ENCLAVE_THREAD_CONTROL 0x80000000 +#define PAGE_ENCLAVE_DECOMMIT (PAGE_ENCLAVE_MASK | 0) +#define PAGE_ENCLAVE_SS_FIRST (PAGE_ENCLAVE_MASK | 1) +#define PAGE_ENCLAVE_SS_REST (PAGE_ENCLAVE_MASK | 2)
#define MEM_COMMIT 0x00001000 #define MEM_RESERVE 0x00002000
-
Alexandre Julliard