Using ret with FASM on Win32
- by Jon Purdy
I'm using SDL with FASM, and have code that's minimally like the following:
format ELF
extrn _SDL_Init
extrn _SDL_SetVideoMode
extrn _SDL_Quit
extrn _exit
SDL_INIT_VIDEO equ 0x00000020
section '.text'
public _SDL_main
_SDL_main:
ccall _SDL_Init, SDL_INIT_VIDEO
ccall _SDL_SetVideoMode, 640, 480, 32, 0
ccall _SDL_Quit
ccall _exit, 0 ; Success, or
ret ; failure.
With the following quick-and-dirty makefile:
SOURCES = main.asm
OBJECTS = main.o
TARGET = SDLASM.exe
FASM = C:\fasm\fasm.exe
release : $(OBJECTS)
ld $(OBJECTS) -LC:/SDL/lib/ -lSDLmain -lSDL -LC:/MinGW/lib/ -lmingw32 -lcrtdll -o $(TARGET) --subsystem windows
cleanrelease :
del $(OBJECTS)
%.o : %.asm
$(FASM) $< $@
Using exit() (or Windows' ExitProcess()) seems to be the only way to get this program to exit cleanly, even though I feel like I should be able to use retn/retf. When I just ret without calling exit(), the application does not terminate and needs to be killed. Could anyone shed some light on this? It only happens when I make the call to SDL_SetVideoMode().
