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Replace most interposed functions with dlsym wrappers on OS X

develop
lethosor 2015-02-21 14:12:25 -05:00
parent db9bcc27e4
commit bd809d7bbc
2 changed files with 74 additions and 77 deletions
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135
library/Hooks-darwin.cpp
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@ -67,15 +67,6 @@ DYLD_INTERPOSE(DFH_SDL_Init,SDL_Init);
DYLD_INTERPOSE(DFH_SDL_PollEvent,SDL_PollEvent);
DYLD_INTERPOSE(DFH_SDL_Quit,SDL_Quit);
DYLD_INTERPOSE(DFH_SDL_NumJoysticks,SDL_NumJoysticks);
DYLD_INTERPOSE(DFH_SDL_CreateRGBSurface,SDL_CreateRGBSurface);
DYLD_INTERPOSE(DFH_SDL_CreateRGBSurfaceFrom,SDL_CreateRGBSurfaceFrom);
DYLD_INTERPOSE(DFH_SDL_UnlockSurface,SDL_UnlockSurface);
DYLD_INTERPOSE(DFH_SDL_LockSurface,SDL_LockSurface);
DYLD_INTERPOSE(DFH_SDL_ConvertSurface,SDL_ConvertSurface);
DYLD_INTERPOSE(DFH_SDL_FreeSurface,SDL_FreeSurface);
DYLD_INTERPOSE(DFH_SDL_GetMouseState,SDL_GetMouseState);
DYLD_INTERPOSE(DFH_SDL_GetVideoSurface,SDL_GetVideoSurface);
DYLD_INTERPOSE(DFH_SDL_UpperBlit,SDL_UpperBlit);
/*******************************************************************************
* SDL part starts here *
@ -93,10 +84,6 @@ DFhackCExport void DFH_SDL_Quit(void)
{
DFHack::Core & c = DFHack::Core::getInstance();
c.Shutdown();
/*if(_SDL_Quit)
{
_SDL_Quit();
}*/
SDL_Quit();
}
@ -145,98 +132,83 @@ DFhackCExport int wgetch(WINDOW *win)
}
}
// hook - called at program start, initialize some stuffs we'll use later
static int (*_SDL_Init)(uint32_t flags) = 0;
DFhackCExport int DFH_SDL_Init(uint32_t flags)
void dlsym_bind_or_exit(void **target, const char *name)
{
// reroute stderr
fprintf(stderr,"dfhack: attempting to hook in\n");
freopen("stderr.log", "w", stderr);
// we don't reroute stdout until we figure out if this should be done at all
// See: Console-linux.cpp
// find real functions
fprintf(stderr,"dfhack: saving real SDL functions\n");
_SDL_Init = (int (*)( uint32_t )) dlsym(RTLD_NEXT, "SDL_Init");
_SDL_Quit = (void (*)( void )) dlsym(RTLD_NEXT, "SDL_Quit");
_SDL_PollEvent = (int (*)(SDL::Event*))dlsym(RTLD_NEXT,"SDL_PollEvent");
fprintf(stderr,"dfhack: saved real SDL functions\n");
// check if we got them
if(_SDL_Init && _SDL_Quit && _SDL_PollEvent)
void *sym = dlsym(RTLD_NEXT, name);
if (sym)
{
if (*target && *target != sym)
{
fprintf(stderr,"dfhack: hooking successful\n");
fprintf(stderr, "warning: rebinding symbol %s from %p to %p\n",
name, *target, sym);
}
*target = sym;
}
else
{
// bail, this would be a disaster otherwise
fprintf(stderr,"dfhack: something went horribly wrong\n");
fprintf(stderr, "Fatal: Could not find symbol: %s\n", name);
fprintf(stdout, "dfhack: something went horribly wrong\n"
"Check stderr.log for details\n");
exit(1);
}
DFHack::Core & c = DFHack::Core::getInstance();
//c.Init();
//int ret = _SDL_Init(flags);
int ret = SDL_Init(flags);
return ret;
}
// New SDL functions starting in r5
static int (*_SDL_CreateRGBSurface)(uint32_t flags, int width, int height, int depth,
static vPtr (*_SDL_CreateRGBSurface)(uint32_t flags, int width, int height, int depth,
uint32_t Rmask, uint32_t Gmask, uint32_t Bmask, uint32_t Amask) = 0;
DFhackCExport vPtr DFH_SDL_CreateRGBSurface(uint32_t flags, int width, int height, int depth,
DFhackCExport vPtr SDL_CreateRGBSurface(uint32_t flags, int width, int height, int depth,
uint32_t Rmask, uint32_t Gmask, uint32_t Bmask, uint32_t Amask)
{
return SDL_CreateRGBSurface(flags, width, height, depth, Rmask, Gmask, Bmask, Amask);
return _SDL_CreateRGBSurface(flags, width, height, depth, Rmask, Gmask, Bmask, Amask);
}
static vPtr (*_SDL_CreateRGBSurfaceFrom)(vPtr pixels, int width, int height, int depth, int pitch,
uint32_t Rmask, uint32_t Gmask, uint32_t Bmask, uint32_t Amask) = 0;
DFhackCExport vPtr DFH_SDL_CreateRGBSurfaceFrom(vPtr pixels, int width, int height, int depth, int pitch,
DFhackCExport vPtr SDL_CreateRGBSurfaceFrom(vPtr pixels, int width, int height, int depth, int pitch,
uint32_t Rmask, uint32_t Gmask, uint32_t Bmask, uint32_t Amask)
{
return SDL_CreateRGBSurfaceFrom(pixels, width, height, depth, pitch, Rmask, Gmask, Bmask, Amask);
return _SDL_CreateRGBSurfaceFrom(pixels, width, height, depth, pitch, Rmask, Gmask, Bmask, Amask);
}
static void (*_SDL_FreeSurface)(vPtr surface) = 0;
DFhackCExport void DFH_SDL_FreeSurface(vPtr surface)
DFhackCExport void SDL_FreeSurface(vPtr surface)
{
SDL_FreeSurface(surface);
_SDL_FreeSurface(surface);
}
static vPtr (*_SDL_ConvertSurface)(vPtr surface, vPtr format, uint32_t flags) = 0;
DFhackCExport vPtr DFH_SDL_ConvertSurface(vPtr surface, vPtr format, uint32_t flags)
DFhackCExport vPtr SDL_ConvertSurface(vPtr surface, vPtr format, uint32_t flags)
{
return SDL_ConvertSurface(surface, format, flags);
return _SDL_ConvertSurface(surface, format, flags);
}
static int (*_SDL_LockSurface)(vPtr surface) = 0;
DFhackCExport int DFH_SDL_LockSurface(vPtr surface)
DFhackCExport int SDL_LockSurface(vPtr surface)
{
return SDL_LockSurface(surface);
return _SDL_LockSurface(surface);
}
static void (*_SDL_UnlockSurface)(vPtr surface) = 0;
DFhackCExport void DFH_SDL_UnlockSurface(vPtr surface)
DFhackCExport void SDL_UnlockSurface(vPtr surface)
{
SDL_UnlockSurface(surface);
_SDL_UnlockSurface(surface);
}
static uint8_t (*_SDL_GetMouseState)(int *, int *) = 0;
DFhackCExport uint8_t DFH_SDL_GetMouseState(int *x, int *y)
DFhackCExport uint8_t SDL_GetMouseState(int *x, int *y)
{
return SDL_GetMouseState(x,y);
return _SDL_GetMouseState(x,y);
}
static void * (*_SDL_GetVideoSurface)( void ) = 0;
DFhackCExport void * DFH_SDL_GetVideoSurface(void)
DFhackCExport void * SDL_GetVideoSurface(void)
{
return SDL_GetVideoSurface();
return _SDL_GetVideoSurface();
}
static int (*_SDL_UpperBlit)(DFHack::DFSDL_Surface* src, DFHack::DFSDL_Rect* srcrect, DFHack::DFSDL_Surface* dst, DFHack::DFSDL_Rect* dstrect) = 0;
DFhackCExport int DFH_SDL_UpperBlit(DFHack::DFSDL_Surface* src, DFHack::DFSDL_Rect* srcrect, DFHack::DFSDL_Surface* dst, DFHack::DFSDL_Rect* dstrect)
DFhackCExport int SDL_UpperBlit(DFHack::DFSDL_Surface* src, DFHack::DFSDL_Rect* srcrect, DFHack::DFSDL_Surface* dst, DFHack::DFSDL_Rect* dstrect)
{
if ( dstrect != NULL && dstrect->h != 0 && dstrect->w != 0 )
{
@ -248,7 +220,7 @@ DFhackCExport int DFH_SDL_UpperBlit(DFHack::DFSDL_Surface* src, DFHack::DFSDL_Re
{
if ( ov->paintOver )
{
SDL_UpperBlit(src, srcrect, dst, dstrect);
_SDL_UpperBlit(src, srcrect, dst, dstrect);
}
DFHack::DFSDL_Rect* dstrect2 = new DFHack::DFSDL_Rect;
@ -266,11 +238,50 @@ DFhackCExport int DFH_SDL_UpperBlit(DFHack::DFSDL_Surface* src, DFHack::DFSDL_Re
dstrect2->h += r->h;
}
int result = SDL_UpperBlit(ov->surface, ov->rect, dst, dstrect2);
int result = _SDL_UpperBlit(ov->surface, ov->rect, dst, dstrect2);
delete dstrect2;
return result;
}
}
return SDL_UpperBlit(src, srcrect, dst, dstrect);
return _SDL_UpperBlit(src, srcrect, dst, dstrect);
}
// hook - called at program start, initialize some stuffs we'll use later
static int (*_SDL_Init)(uint32_t flags) = 0;
DFhackCExport int DFH_SDL_Init(uint32_t flags)
{
// reroute stderr
fprintf(stderr,"dfhack: attempting to hook in\n");
freopen("stderr.log", "w", stderr);
// we don't reroute stdout until we figure out if this should be done at all
// See: Console-linux.cpp
// find real functions
fprintf(stderr,"dfhack: saving real SDL functions\n");
#define bind(sym) dlsym_bind_or_exit((void**)&_##sym, #sym)
bind(SDL_Init);
bind(SDL_Quit);
bind(SDL_PollEvent);
bind(SDL_UpperBlit);
bind(SDL_CreateRGBSurface);
bind(SDL_CreateRGBSurfaceFrom);
bind(SDL_FreeSurface);
bind(SDL_ConvertSurface);
bind(SDL_LockSurface);
bind(SDL_UnlockSurface);
bind(SDL_GetMouseState);
bind(SDL_GetVideoSurface);
#undef bind
fprintf(stderr, "dfhack: saved real SDL functions\n");
assert(_SDL_Init && _SDL_Quit && _SDL_PollEvent);
fprintf(stderr, "dfhack: hooking successful\n");
DFHack::Core & c = DFHack::Core::getInstance();
int ret = SDL_Init(flags);
return ret;
}

16
library/include/Hooks.h
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@ -52,27 +52,13 @@ DFhackCExport int DFH_SDL_NumJoysticks(void);
DFhackCExport void DFH_SDL_Quit(void);
DFhackCExport int DFH_SDL_PollEvent(SDL::Event* event);
DFhackCExport int DFH_SDL_Init(uint32_t flags);
DFhackCExport uint8_t DFH_SDL_GetMouseState(int *x, int *y);
DFhackCExport void * DFH_SDL_GetVideoSurface(void);
DFhackCExport int DFH_SDL_UpperBlit(DFHack::DFSDL_Surface* src, DFHack::DFSDL_Rect* srcrect, DFHack::DFSDL_Surface* dst, DFHack::DFSDL_Rect* dstrect);
DFhackCExport vPtr DFH_SDL_CreateRGBSurface(uint32_t flags, int width, int height, int depth,
uint32_t Rmask, uint32_t Gmask, uint32_t Bmask, uint32_t Amask);
DFhackCExport vPtr DFH_SDL_CreateRGBSurfaceFrom(vPtr pixels, int width, int height, int depth, int pitch,
uint32_t Rmask, uint32_t Gmask, uint32_t Bmask, uint32_t Amask);
DFhackCExport void DFH_SDL_FreeSurface(vPtr surface);
DFhackCExport vPtr DFH_SDL_ConvertSurface(vPtr surface, vPtr format, uint32_t flags);
DFhackCExport int DFH_SDL_LockSurface(vPtr surface);
DFhackCExport void DFH_SDL_UnlockSurface(vPtr surface);
DFhackCExport uint8_t DFH_SDL_GetMouseState(int *x, int *y);
DFhackCExport void * DFH_SDL_GetVideoSurface(void);
#endif
DFhackCExport int SDL_NumJoysticks(void);
DFhackCExport void SDL_Quit(void);
DFhackCExport int SDL_PollEvent(SDL::Event* event);
DFhackCExport int SDL_Init(uint32_t flags);
DFhackCExport int wgetch(WINDOW * win);
DFhackCExport uint8_t SDL_GetMouseState(int *x, int *y);
DFhackCExport void * SDL_GetVideoSurface(void);
DFhackCExport int SDL_UpperBlit(DFHack::DFSDL_Surface* src, DFHack::DFSDL_Rect* srcrect, DFHack::DFSDL_Surface* dst, DFHack::DFSDL_Rect* dstrect);
DFhackCExport vPtr SDL_CreateRGBSurface(uint32_t flags, int width, int height, int depth,
uint32_t Rmask, uint32_t Gmask, uint32_t Bmask, uint32_t Amask);