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Changes to support building shared libraries with PIC support.

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This commit is contained in:
joseph
2000-01-28 20:52:45 +00:00
parent cfd45a3465
commit fbfc04864d
3 changed files with 98 additions and 12 deletions
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52
glide2x/cvg/glide/src/gdraw.c
View File

@@ -19,6 +19,9 @@
**
** $Header$
** $Log$
** Revision 1.3 2000/01/17 22:18:41 joseph
** A nicer, cleaner fix than the evil hack.
**
** Revision 1.2 2000/01/15 00:08:22 joseph
** Evil nasty hack to fix dispatch code using binutils 2.9.5.
**
@@ -687,16 +690,53 @@ all_done:
}
#endif
#if defined( __linux__ )
/* Here's the basic strategy for this dispatch code:
* We jump to _GlideRoot.curGC->archDispatchProcs.triSetupProc
* which contains code that looks like a function, we leave the
* paramters passed to grDrawTriangle on the stack and the dispatched
* function picks them up. However we have to compensate for
* the compiler pushing anything on the stack. The following describes
* why and when we have to pop.
*
* BIG_OPT: gcc pushes a frame pointer to maintain things, BIG_OPT
* turns on -fomit-frame-pointer so we don't have to pop it.
*
* PIC: When using position independant code gcc stores eip in ebx
* so it saves ebx from the previous call automatically.
* Therefore, once we have the jump address we have to pop ebx
* to restore the stack.
*
* The syntax is further complicated by the fact that gcc can (and will)
* emit code between the asm statements, so they all need to be in a single
* asm statement, wrapped with #ifdef's. This means we have fun with
* deciding if we need to list trashed registers and when we need commas
* between them.
*/
asm (
#if defined(PIC)
"popl %%ebx\n\t"
#endif
#if !defined(BIG_OPT)
asm( "popl %%ebp" : /* no outputs*/ : /* no inputs */ : "ebp");
"popl %%ebp\n\t"
#endif
asm( "jmp *%0"
: /* no outputs */
"jmp *%0"
: /* no outputs */
: "m" (_GlideRoot.curGC->cmdTransportInfo.triSetupProc)
#if defined (PIC) || !defined (BIG_OPT)
:
#endif
#if defined (PIC)
"ebx"
#endif
#if defined (PIC) && !defined (BIG_OPT)
,
#endif
#if !defined(BIG_OPT)
"ebp"
#endif
);
#endif
#endif
#undef FN_NAME

51
glide2x/h3/glide/src/gdraw.c
View File

@@ -19,6 +19,9 @@
**
** $Header$
** $Log$
** Revision 1.1.1.1 1999/12/07 21:49:27 joseph
** Initial checkin into SourceForge.
**
**
** 3 3/17/99 6:16p Dow
** Phantom Menace and other fixes.
@@ -725,12 +728,52 @@ all_done:
}
#endif
#if defined( __linux__ )
/* Here's the basic strategy for this dispatch code:
* We jump to _GlideRoot.curGC->archDispatchProcs.triSetupProc
* which contains code that looks like a function, we leave the
* paramters passed to grDrawTriangle on the stack and the dispatched
* function picks them up. However we have to compensate for
* the compiler pushing anything on the stack. The following describes
* why and when we have to pop.
*
* BIG_OPT: gcc pushes a frame pointer to maintain things, BIG_OPT
* turns on -fomit-frame-pointer so we don't have to pop it.
*
* PIC: When using position independant code gcc stores eip in ebx
* so it saves ebx from the previous call automatically.
* Therefore, once we have the jump address we have to pop ebx
* to restore the stack.
*
* The syntax is further complicated by the fact that gcc can (and will)
* emit code between the asm statements, so they all need to be in a single
* asm statement, wrapped with #ifdef's. This means we have fun with
* deciding if we need to list trashed registers and when we need commas
* between them.
*/
asm (
#if defined(PIC)
"popl %%ebx\n\t"
#endif
#if !defined(BIG_OPT)
asm( "popl %%ebp" : /* no outputs*/ : /* no inputs */ : "ebp");
"popl %%ebp\n\t"
#endif
"jmp *%0"
: /* no outputs */
:"m" (_GlideRoot.curGC->archDispatchProcs.triSetupProc)
#if defined (PIC) || !defined (BIG_OPT)
:
#endif
#if defined (PIC)
"ebx"
#endif
#if defined (PIC) && !defined (BIG_OPT)
,
#endif
#if !defined(BIG_OPT)
"ebp"
#endif
asm( "jmp *%0"
: /* no outputs */
: "m" (_GlideRoot.curGC->archDispatchProcs.triSetupProc)
);
#endif
#endif

7
swlibs/include/make/3dfx.mak
View File

@@ -76,6 +76,9 @@ endif
ifeq "$(OS)" "Linux"
GCINCS = -I. -I$(BUILD_ROOT_SWLIBS)/include -I$(BUILD_ROOT_HW)/include
GCOPTS = -Wall
ifeq "$(FX_GLIDE_PIC)" "1"
GCOPTS := $(GCOPTS) -fPIC -DPIC
endif
#
# BIG_OPT Indicates O3(?) or better is being used. It changes the
# assembly language in grDrawTriangle. Larger optimization removes
@@ -208,8 +211,8 @@ ifdef INSTALL_DESTINATION
$(INSTALL) -m 444 $(LIBRARIES) $(INSTALL_DESTINATION)/lib
ifneq "$(SHARED_LIBRARY)" ""
$(INSTALL) -m 444 $(SHARED_LIBRARY) $(INSTALL_DESTINATION)/lib
ln -s $(INSTALL_DESTINATION)/lib/$(SHARED_LIBRARY) $(INSTALL_DESTINATION)/lib/$(SONAME)
ln -s $(INSTALL_DESTINATION)/lib/$(SHARED_LIBRARY) $(INSTALL_DESTINATION)/lib/$(BASENAME)
ln -sf $(INSTALL_DESTINATION)/lib/$(SHARED_LIBRARY) $(INSTALL_DESTINATION)/lib/$(SONAME)
ln -sf $(INSTALL_DESTINATION)/lib/$(SHARED_LIBRARY) $(INSTALL_DESTINATION)/lib/$(BASENAME)
endif
else
@echo INSTALL_DESTINATION not defined, not installing LIBRARIES