diff options
| -rw-r--r-- | compile.bat | 14 | ||||
| -rw-r--r-- | src/wincrt.c | 48 |
2 files changed, 57 insertions, 5 deletions
diff --git a/compile.bat b/compile.bat index 9d8a2a3..1145b27 100644 --- a/compile.bat +++ b/compile.bat @@ -42,9 +42,9 @@ set objs=%objs% .build/%basename%.o :: year to get anything done. typeof=__typeof prevents pedantic warnings caused
:: by typeof still technically being an extension, and stdbool gives us
:: predefined bool/true/false before compilers start doing that by default
-%CC% -m32 -c -flto %cflags% %warnings% -I.build/include -D_CRT_SECURE_NO_WARNINGS -D_DLL ^
--DWIN32_LEAN_AND_MEAN -DNOMINMAX%dmodname% -Dtypeof=__typeof -include stdbool.h ^
--o .build/%basename%.o %1 || exit /b
+%CC% -m32 -c -flto -mno-stack-arg-probe %cflags% %warnings% -I.build/include ^
+-D_CRT_SECURE_NO_WARNINGS -D_DLL -DWIN32_LEAN_AND_MEAN -DNOMINMAX%dmodname% ^
+-Dtypeof=__typeof -include stdbool.h -o .build/%basename%.o %1 || exit /b
goto :eof
:src
@@ -90,6 +90,7 @@ setlocal DisableDelayedExpansion :: just tack these on, whatever (repeated condition because of expansion memes)
if "%dbg%"=="1" set src=%src% src/dbg.c
if "%dbg%"=="1" set src=%src% src/udis86.c
+if "%dbg%"=="0" set src=%src% src/wincrt.c
%HOSTCC% -municode -O2 %warnings% -D_CRT_SECURE_NO_WARNINGS -include stdbool.h -ladvapi32 ^
-o .build/codegen.exe src/build/codegen.c src/build/cmeta.c || exit /b
@@ -104,11 +105,14 @@ llvm-rc /FO .build\dll.res src\dll.rc || exit /b %CC% -shared -O0 -w -o .build/tier0.dll src/stubs/tier0.c
%CC% -shared -O0 -w -o .build/vstdlib.dll src/stubs/vstdlib.c
for %%b in (%src%) do ( call :cc %%b || exit /b )
-:: we need different library names for debugging because Microsoft.
+:: we need different library names for debugging because Microsoft...
+:: actually, it's different anyway because we don't use vcruntime for releases
+:: any more. see comment in wincrt.c
+:: required runtime bits ourselves (which saves 10KiB over static VCRT)
if "%dbg%"=="1" (
set clibs=-lmsvcrtd -lvcruntimed -lucrtd
) else (
- set clibs=-lmsvcrt -lvcruntime -lucrt
+ set clibs=-lucrt
)
%CC% -shared -flto %ldflags% -Wl,/IMPLIB:.build/sst.lib,/Brepro,/nodefaultlib ^
-L.build %clibs% -lkernel32 -luser32 -ladvapi32 -lshlwapi -ld3d9 -ldsound ^
diff --git a/src/wincrt.c b/src/wincrt.c new file mode 100644 index 0000000..8ffa6cb --- /dev/null +++ b/src/wincrt.c @@ -0,0 +1,48 @@ +/* This file is dedicated to the public domain. */ + +// We get most of the libc functions from ucrtbase.dll, which comes with +// Windows, but for some reason a few of the intrinsic-y things are part of +// vcruntime, which does *not* come with Windows!!! We can statically link just +// that part but it adds ~12KiB of random useless bloat to our binary. So, let's +// just implement the handful of required things here instead. This is only for +// release/non-debug builds; we want the extra checks in Microsoft's CRT when +// debugging. +// +// Is it actually reasonable to have to do any of this? Of course not. + +// TODO(opt): this feels like a sad implementation, can we do marginally better? +int memcmp(const void *x_, const void *y_, unsigned int sz) { + const char *x = x_, *y = y_; + for (unsigned int i = 0; i < sz; ++i) { + if (x[i] > y[i]) return 1; + if (x[i] < y[i]) return -1; + } + return 0; +} + +void *memcpy(void *restrict x, const void *restrict y, unsigned int sz) { +#ifdef __clang__ + __asm__ volatile ( + "rep movsb\n" : + "=D" (x), "=S" (y), "=c" (sz) : + "0" (x), "1" (y), "2" (sz) : + "memory" + ); +#else // terrible fallback just in case someone wants to use this with MSVC + char *restrict xb = x; const char *restrict yb = y; + for (unsigned int i = 0; i < sz; ++i) xb[i] = yb[i]; +#endif + return x; +} + +int __stdcall _DllMainCRTStartup(void *inst, unsigned int reason, + void *reserved) { + return 1; +} + +#ifdef __clang__ +__attribute__((used)) +#endif +int _fltused = 1; + +// vi: sw=4 ts=4 noet tw=80 cc=80 |