From 4a9b204920152c668228a9d43a63be39b0c32f45 Mon Sep 17 00:00:00 2001 From: Matthias Aßhauer Date: Sat, 8 Jan 2022 16:02:30 +0000 Subject: lazyload: use correct calling conventions MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Christoph Reiter reported on the Git for Windows issue tracker[1], that mingw_strftime() imports strftime() from ucrtbase.dll with the wrong calling convention. It should be __cdecl instead of WINAPI, which we always use in DECLARE_PROC_ADDR(). The MSYS2 project encountered cmake sefaults on x86 Windows caused by the same issue in the cmake source. [2] There are no known git crashes that where caused by this, yet, but we should try to prevent them. We import two other non-WINAPI functions via DECLARE_PROC_ADDR(), too. * NtSetSystemInformation() (NTAPI) * GetUserNameExW() (SEC_ENTRY) NTAPI, SEC_ENTRY and WINAPI are all ususally defined as __stdcall, but there are circumstances where they're defined differently. Teach DECLARE_PROC_ADDR() about calling conventions and be explicit about when we want to use which calling convention. Import winnt.h for the definition of NTAPI and sspi.h for SEC_ENTRY near their respective only users. [1] https://github.com/git-for-windows/git/issues/3560 [2] https://github.com/msys2/MINGW-packages/issues/10152 Reported-By: Christoph Reiter Signed-off-by: Matthias Aßhauer Signed-off-by: Junio C Hamano --- compat/mingw.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'compat/mingw.c') diff --git a/compat/mingw.c b/compat/mingw.c index 9e0cd1e097..f38c438112 100644 --- a/compat/mingw.c +++ b/compat/mingw.c @@ -8,6 +8,8 @@ #include "win32/lazyload.h" #include "../config.h" #include "dir.h" +#define SECURITY_WIN32 +#include #define HCAST(type, handle) ((type)(intptr_t)handle) @@ -1008,7 +1010,7 @@ size_t mingw_strftime(char *s, size_t max, /* a pointer to the original strftime in case we can't find the UCRT version */ static size_t (*fallback)(char *, size_t, const char *, const struct tm *) = strftime; size_t ret; - DECLARE_PROC_ADDR(ucrtbase.dll, size_t, strftime, char *, size_t, + DECLARE_PROC_ADDR(ucrtbase.dll, size_t, __cdecl, strftime, char *, size_t, const char *, const struct tm *); if (INIT_PROC_ADDR(strftime)) @@ -2183,7 +2185,7 @@ enum EXTENDED_NAME_FORMAT { static char *get_extended_user_info(enum EXTENDED_NAME_FORMAT type) { - DECLARE_PROC_ADDR(secur32.dll, BOOL, GetUserNameExW, + DECLARE_PROC_ADDR(secur32.dll, BOOL, SEC_ENTRY, GetUserNameExW, enum EXTENDED_NAME_FORMAT, LPCWSTR, PULONG); static wchar_t wbuffer[1024]; DWORD len; -- cgit v1.3