1 /* -----------------------------------------------------------------------------
3 * (c) The GHC Team, 1998-2004
5 * Registers in the STG machine.
7 * The STG machine has a collection of "registers", each one of which
8 * may or may not correspond to an actual machine register when
11 * The register set is backed by a table in memory (struct
12 * StgRegTable). If a particular STG register is not mapped to a
13 * machine register, then the apprpriate slot in this table is used
16 * This table is itself pointed to by another register, BaseReg. If
17 * BaseReg is not in a machine register, then the register table is
18 * used from an absolute location (MainCapability).
20 * ---------------------------------------------------------------------------*/
25 #include "gmp.h" // Needs MP_INT definition
28 * Spark pools: used to store pending sparks
29 * (THREADED_RTS & PARALLEL_HASKELL only)
30 * This is a circular buffer. Invariants:
33 * - if hd==tl, then the pool is empty.
34 * - if hd == tl+1, then the pool is full.
35 * Adding to the pool is done by assigning to *tl++ (wrapping round as
36 * necessary). When adding to a full pool, we have the option of
37 * throwing away either the oldest (hd++) or the most recent (tl--) entry.
39 typedef struct StgSparkPool_ {
46 #define ASSERT_SPARK_POOL_INVARIANTS(p) \
47 ASSERT((p)->base <= (p)->hd); \
48 ASSERT((p)->hd < (p)->lim); \
49 ASSERT((p)->base <= (p)->tl); \
50 ASSERT((p)->tl < (p)->lim);
53 StgFunPtr stgGCEnter1;
58 * Vanilla registers are given this union type, which is purely so
59 * that we can cast the vanilla reg to a variety of types with the
60 * minimum of syntax. eg. R1.w instead of (StgWord)R1.
71 StgStackOffset offset; /* unused? */
77 * This is the table that holds shadow-locations for all the STG
78 * registers. The shadow locations are used when:
80 * 1) the particular register isn't mapped to a real machine
81 * register, probably because there's a shortage of real registers.
82 * 2) caller-saves registers are saved across a CCall
84 typedef struct StgRegTable_ {
93 StgUnion rR9; /* used occasionally by heap/stack checks */
94 StgUnion rR10; /* used occasionally by heap/stack checks */
106 struct StgTSO_ *rCurrentTSO;
107 struct step_ *rNursery;
108 struct bdescr_ *rCurrentNursery; /* Hp/HpLim point into this block */
109 struct bdescr_ *rCurrentAlloc; /* for allocation using allocate() */
110 StgWord rHpAlloc; /* number of *bytes* being allocated in heap */
111 // rmp_tmp1..rmp_result2 are only used in THREADED_RTS builds to
112 // avoid per-thread temps in bss, but currently always incldue here
113 // so we just run mkDerivedConstants once
119 StgWord rRet; // holds the return code of the thread
120 #if defined(THREADED_RTS) || defined(PAR)
121 StgSparkPool rSparks; /* per-task spark pool */
128 * Registers Hp and HpLim are global across the entire system, and are
129 * copied into the RegTable before executing a thread.
131 * Registers Sp and SpLim are saved in the TSO for the
132 * thread, but are copied into the RegTable before executing a thread.
134 * All other registers are "general purpose", and are used for passing
135 * arguments to functions, and returning values. The code generator
136 * knows how many of these are in real registers, and avoids
137 * generating code that uses non-real registers. General purpose
138 * registers are never saved when returning to the scheduler, instead
139 * we save whatever is live at the time on the stack, and restore it
140 * later. This should reduce the context switch time, amongst other
143 * For argument passing, the stack will be used in preference to
144 * pseudo-registers if the architecture has too few general purpose
147 * Some special RTS functions like newArray and the Integer primitives
148 * expect their arguments to be in registers R1-Rn, so we use these
149 * (pseudo-)registers in those cases.
153 * Locations for saving per-thread registers.
156 #define SAVE_Sp (CurrentTSO->sp)
157 #define SAVE_SpLim (CurrentTSO->splim)
159 #define SAVE_Hp (BaseReg->rHp)
160 #define SAVE_HpLim (BaseReg->rHpLim)
162 #define SAVE_CurrentTSO (BaseReg->rCurrentTSO)
163 #define SAVE_CurrentNursery (BaseReg->rCurrentNursery)
164 #define SAVE_HpAlloc (BaseReg->rHpAlloc)
165 #define SAVE_SparkHd (BaseReg->rSparks.hd)
166 #define SAVE_SparkTl (BaseReg->rSparks.tl)
167 #define SAVE_SparkBase (BaseReg->rSparks.base)
168 #define SAVE_SparkLim (BaseReg->rSparks.lim)
170 /* We sometimes need to save registers across a C-call, eg. if they
171 * are clobbered in the standard calling convention. We define the
172 * save locations for all registers in the register table.
175 #define SAVE_R1 (BaseReg->rR1)
176 #define SAVE_R2 (BaseReg->rR2)
177 #define SAVE_R3 (BaseReg->rR3)
178 #define SAVE_R4 (BaseReg->rR4)
179 #define SAVE_R5 (BaseReg->rR5)
180 #define SAVE_R6 (BaseReg->rR6)
181 #define SAVE_R7 (BaseReg->rR7)
182 #define SAVE_R8 (BaseReg->rR8)
184 #define SAVE_F1 (BaseReg->rF1)
185 #define SAVE_F2 (BaseReg->rF2)
186 #define SAVE_F3 (BaseReg->rF3)
187 #define SAVE_F4 (BaseReg->rF4)
189 #define SAVE_D1 (BaseReg->rD1)
190 #define SAVE_D2 (BaseReg->rD2)
192 #define SAVE_L1 (BaseReg->rL1)
194 /* -----------------------------------------------------------------------------
195 * Emit the GCC-specific register declarations for each machine
196 * register being used. If any STG register isn't mapped to a machine
197 * register, then map it to an offset from BaseReg.
199 * First, the general purpose registers. The idea is, if a particular
200 * general-purpose STG register can't be mapped to a real machine
201 * register, it won't be used at all. Instead, we'll use the stack.
203 * This is an improvement on the way things used to be done, when all
204 * registers were mapped to locations in the register table, and stuff
205 * was being shifted from the stack to the register table and back
206 * again for no good reason (on register-poor architectures).
209 /* define NO_REGS to omit register declarations - used in RTS C code
210 * that needs all the STG definitions but not the global register
213 #define GLOBAL_REG_DECL(type,name,reg) register type name REG(reg);
215 #if defined(REG_R1) && !defined(NO_GLOBAL_REG_DECLS)
216 GLOBAL_REG_DECL(StgUnion,R1,REG_R1)
218 # define R1 (BaseReg->rR1)
221 #if defined(REG_R2) && !defined(NO_GLOBAL_REG_DECLS)
222 GLOBAL_REG_DECL(StgUnion,R2,REG_R2)
224 # define R2 (BaseReg->rR2)
227 #if defined(REG_R3) && !defined(NO_GLOBAL_REG_DECLS)
228 GLOBAL_REG_DECL(StgUnion,R3,REG_R3)
230 # define R3 (BaseReg->rR3)
233 #if defined(REG_R4) && !defined(NO_GLOBAL_REG_DECLS)
234 GLOBAL_REG_DECL(StgUnion,R4,REG_R4)
236 # define R4 (BaseReg->rR4)
239 #if defined(REG_R5) && !defined(NO_GLOBAL_REG_DECLS)
240 GLOBAL_REG_DECL(StgUnion,R5,REG_R5)
242 # define R5 (BaseReg->rR5)
245 #if defined(REG_R6) && !defined(NO_GLOBAL_REG_DECLS)
246 GLOBAL_REG_DECL(StgUnion,R6,REG_R6)
248 # define R6 (BaseReg->rR6)
251 #if defined(REG_R7) && !defined(NO_GLOBAL_REG_DECLS)
252 GLOBAL_REG_DECL(StgUnion,R7,REG_R7)
254 # define R7 (BaseReg->rR7)
257 #if defined(REG_R8) && !defined(NO_GLOBAL_REG_DECLS)
258 GLOBAL_REG_DECL(StgUnion,R8,REG_R8)
260 # define R8 (BaseReg->rR8)
263 #if defined(REG_R9) && !defined(NO_GLOBAL_REG_DECLS)
264 GLOBAL_REG_DECL(StgUnion,R9,REG_R9)
266 # define R9 (BaseReg->rR9)
269 #if defined(REG_R10) && !defined(NO_GLOBAL_REG_DECLS)
270 GLOBAL_REG_DECL(StgUnion,R10,REG_R10)
272 # define R10 (BaseReg->rR10)
275 #if defined(REG_F1) && !defined(NO_GLOBAL_REG_DECLS)
276 GLOBAL_REG_DECL(StgFloat,F1,REG_F1)
278 #define F1 (BaseReg->rF1)
281 #if defined(REG_F2) && !defined(NO_GLOBAL_REG_DECLS)
282 GLOBAL_REG_DECL(StgFloat,F2,REG_F2)
284 #define F2 (BaseReg->rF2)
287 #if defined(REG_F3) && !defined(NO_GLOBAL_REG_DECLS)
288 GLOBAL_REG_DECL(StgFloat,F3,REG_F3)
290 #define F3 (BaseReg->rF3)
293 #if defined(REG_F4) && !defined(NO_GLOBAL_REG_DECLS)
294 GLOBAL_REG_DECL(StgFloat,F4,REG_F4)
296 #define F4 (BaseReg->rF4)
299 #if defined(REG_D1) && !defined(NO_GLOBAL_REG_DECLS)
300 GLOBAL_REG_DECL(StgDouble,D1,REG_D1)
302 #define D1 (BaseReg->rD1)
305 #if defined(REG_D2) && !defined(NO_GLOBAL_REG_DECLS)
306 GLOBAL_REG_DECL(StgDouble,D2,REG_D2)
308 #define D2 (BaseReg->rD2)
311 #if defined(REG_L1) && !defined(NO_GLOBAL_REG_DECLS)
312 GLOBAL_REG_DECL(StgWord64,L1,REG_L1)
314 #define L1 (BaseReg->rL1)
318 * If BaseReg isn't mapped to a machine register, just use the global
319 * address of the current register table (CurrentRegTable in
320 * concurrent Haskell, MainRegTable otherwise).
323 /* A capability is a combination of a FunTable and a RegTable. In STG
324 * code, BaseReg normally points to the RegTable portion of this
325 * structure, so that we can index both forwards and backwards to take
326 * advantage of shorter instruction forms on some archs (eg. x86).
327 * This is a cut-down version of the Capability structure; the full
328 * version is defined in Capability.h.
330 struct PartCapability_ {
335 /* No such thing as a MainCapability under THREADED_RTS - each thread must have
336 * its own Capability.
338 #if IN_STG_CODE && !defined(THREADED_RTS)
339 extern W_ MainCapability[];
343 * Assigning to BaseReg (the ASSIGN_BaseReg macro): this happens on
344 * return from a "safe" foreign call, when the thread might be running
345 * on a new Capability. Obviously if BaseReg is not a register, then
346 * we are restricted to a single Capability (this invariant is enforced
347 * in Capability.c:initCapabilities), and assigning to BaseReg can be omitted.
350 #if defined(REG_Base) && !defined(NO_GLOBAL_REG_DECLS)
351 GLOBAL_REG_DECL(StgRegTable *,BaseReg,REG_Base)
352 #define ASSIGN_BaseReg(e) (BaseReg = (e))
355 #error BaseReg must be in a register for THREADED_RTS
357 #define BaseReg (&((struct PartCapability_ *)MainCapability)->r)
358 #define ASSIGN_BaseReg(e) (e)
361 #if defined(REG_Sp) && !defined(NO_GLOBAL_REG_DECLS)
362 GLOBAL_REG_DECL(P_,Sp,REG_Sp)
364 #define Sp (BaseReg->rSp)
367 #if defined(REG_SpLim) && !defined(NO_GLOBAL_REG_DECLS)
368 GLOBAL_REG_DECL(P_,SpLim,REG_SpLim)
370 #define SpLim (BaseReg->rSpLim)
373 #if defined(REG_Hp) && !defined(NO_GLOBAL_REG_DECLS)
374 GLOBAL_REG_DECL(P_,Hp,REG_Hp)
376 #define Hp (BaseReg->rHp)
379 #if defined(REG_HpLim) && !defined(NO_GLOBAL_REG_DECLS)
380 GLOBAL_REG_DECL(P_,HpLim,REG_HpLim)
382 #define HpLim (BaseReg->rHpLim)
385 #if defined(REG_CurrentTSO) && !defined(NO_GLOBAL_REG_DECLS)
386 GLOBAL_REG_DECL(struct _StgTSO *,CurrentTSO,REG_CurrentTSO)
388 #define CurrentTSO (BaseReg->rCurrentTSO)
391 #if defined(REG_CurrentNursery) && !defined(NO_GLOBAL_REG_DECLS)
392 GLOBAL_REG_DECL(bdescr *,CurrentNursery,REG_CurrentNursery)
394 #define CurrentNursery (BaseReg->rCurrentNursery)
397 #if defined(REG_HpAlloc) && !defined(NO_GLOBAL_REG_DECLS)
398 GLOBAL_REG_DECL(bdescr *,HpAlloc,REG_HpAlloc)
400 #define HpAlloc (BaseReg->rHpAlloc)
403 #if defined(REG_SparkHd) && !defined(NO_GLOBAL_REG_DECLS)
404 GLOBAL_REG_DECL(bdescr *,SparkHd,REG_SparkHd)
406 #define SparkHd (BaseReg->rSparks.hd)
409 #if defined(REG_SparkTl) && !defined(NO_GLOBAL_REG_DECLS)
410 GLOBAL_REG_DECL(bdescr *,SparkTl,REG_SparkTl)
412 #define SparkTl (BaseReg->rSparks.tl)
415 #if defined(REG_SparkBase) && !defined(NO_GLOBAL_REG_DECLS)
416 GLOBAL_REG_DECL(bdescr *,SparkBase,REG_SparkBase)
418 #define SparkBase (BaseReg->rSparks.base)
421 #if defined(REG_SparkLim) && !defined(NO_GLOBAL_REG_DECLS)
422 GLOBAL_REG_DECL(bdescr *,SparkLim,REG_SparkLim)
424 #define SparkLim (BaseReg->rSparks.lim)
427 /* -----------------------------------------------------------------------------
428 Get absolute function pointers from the register table, to save
437 as long as the offset is within the range of a signed byte
438 (-128..+127). So we pick some common absolute_addresses and put
439 them in the register table. As a bonus, linking time should also
442 Other possible candidates in order of importance:
445 stg_CAF_BLACKHOLE_info
448 anything else probably isn't worth the effort.
450 -------------------------------------------------------------------------- */
453 #define FunReg ((StgFunTable *)((void *)BaseReg - sizeof(StgFunTable)))
455 #define stg_gc_enter_1 (FunReg->stgGCEnter1)
456 #define stg_gc_fun (FunReg->stgGCFun)
458 /* -----------------------------------------------------------------------------
459 For any registers which are denoted "caller-saves" by the C calling
460 convention, we have to emit code to save and restore them across C
462 -------------------------------------------------------------------------- */
464 #ifdef CALLER_SAVES_R1
465 #define CALLER_SAVE_R1 SAVE_R1 = R1;
466 #define CALLER_RESTORE_R1 R1 = SAVE_R1;
468 #define CALLER_SAVE_R1 /* nothing */
469 #define CALLER_RESTORE_R1 /* nothing */
472 #ifdef CALLER_SAVES_R2
473 #define CALLER_SAVE_R2 SAVE_R2 = R2;
474 #define CALLER_RESTORE_R2 R2 = SAVE_R2;
476 #define CALLER_SAVE_R2 /* nothing */
477 #define CALLER_RESTORE_R2 /* nothing */
480 #ifdef CALLER_SAVES_R3
481 #define CALLER_SAVE_R3 SAVE_R3 = R3;
482 #define CALLER_RESTORE_R3 R3 = SAVE_R3;
484 #define CALLER_SAVE_R3 /* nothing */
485 #define CALLER_RESTORE_R3 /* nothing */
488 #ifdef CALLER_SAVES_R4
489 #define CALLER_SAVE_R4 SAVE_R4 = R4;
490 #define CALLER_RESTORE_R4 R4 = SAVE_R4;
492 #define CALLER_SAVE_R4 /* nothing */
493 #define CALLER_RESTORE_R4 /* nothing */
496 #ifdef CALLER_SAVES_R5
497 #define CALLER_SAVE_R5 SAVE_R5 = R5;
498 #define CALLER_RESTORE_R5 R5 = SAVE_R5;
500 #define CALLER_SAVE_R5 /* nothing */
501 #define CALLER_RESTORE_R5 /* nothing */
504 #ifdef CALLER_SAVES_R6
505 #define CALLER_SAVE_R6 SAVE_R6 = R6;
506 #define CALLER_RESTORE_R6 R6 = SAVE_R6;
508 #define CALLER_SAVE_R6 /* nothing */
509 #define CALLER_RESTORE_R6 /* nothing */
512 #ifdef CALLER_SAVES_R7
513 #define CALLER_SAVE_R7 SAVE_R7 = R7;
514 #define CALLER_RESTORE_R7 R7 = SAVE_R7;
516 #define CALLER_SAVE_R7 /* nothing */
517 #define CALLER_RESTORE_R7 /* nothing */
520 #ifdef CALLER_SAVES_R8
521 #define CALLER_SAVE_R8 SAVE_R8 = R8;
522 #define CALLER_RESTORE_R8 R8 = SAVE_R8;
524 #define CALLER_SAVE_R8 /* nothing */
525 #define CALLER_RESTORE_R8 /* nothing */
528 #ifdef CALLER_SAVES_R9
529 #define CALLER_SAVE_R9 SAVE_R9 = R9;
530 #define CALLER_RESTORE_R9 R9 = SAVE_R9;
532 #define CALLER_SAVE_R9 /* nothing */
533 #define CALLER_RESTORE_R9 /* nothing */
536 #ifdef CALLER_SAVES_R10
537 #define CALLER_SAVE_R10 SAVE_R10 = R10;
538 #define CALLER_RESTORE_R10 R10 = SAVE_R10;
540 #define CALLER_SAVE_R10 /* nothing */
541 #define CALLER_RESTORE_R10 /* nothing */
544 #ifdef CALLER_SAVES_F1
545 #define CALLER_SAVE_F1 SAVE_F1 = F1;
546 #define CALLER_RESTORE_F1 F1 = SAVE_F1;
548 #define CALLER_SAVE_F1 /* nothing */
549 #define CALLER_RESTORE_F1 /* nothing */
552 #ifdef CALLER_SAVES_F2
553 #define CALLER_SAVE_F2 SAVE_F2 = F2;
554 #define CALLER_RESTORE_F2 F2 = SAVE_F2;
556 #define CALLER_SAVE_F2 /* nothing */
557 #define CALLER_RESTORE_F2 /* nothing */
560 #ifdef CALLER_SAVES_F3
561 #define CALLER_SAVE_F3 SAVE_F3 = F3;
562 #define CALLER_RESTORE_F3 F3 = SAVE_F3;
564 #define CALLER_SAVE_F3 /* nothing */
565 #define CALLER_RESTORE_F3 /* nothing */
568 #ifdef CALLER_SAVES_F4
569 #define CALLER_SAVE_F4 SAVE_F4 = F4;
570 #define CALLER_RESTORE_F4 F4 = SAVE_F4;
572 #define CALLER_SAVE_F4 /* nothing */
573 #define CALLER_RESTORE_F4 /* nothing */
576 #ifdef CALLER_SAVES_D1
577 #define CALLER_SAVE_D1 SAVE_D1 = D1;
578 #define CALLER_RESTORE_D1 D1 = SAVE_D1;
580 #define CALLER_SAVE_D1 /* nothing */
581 #define CALLER_RESTORE_D1 /* nothing */
584 #ifdef CALLER_SAVES_D2
585 #define CALLER_SAVE_D2 SAVE_D2 = D2;
586 #define CALLER_RESTORE_D2 D2 = SAVE_D2;
588 #define CALLER_SAVE_D2 /* nothing */
589 #define CALLER_RESTORE_D2 /* nothing */
592 #ifdef CALLER_SAVES_L1
593 #define CALLER_SAVE_L1 SAVE_L1 = L1;
594 #define CALLER_RESTORE_L1 L1 = SAVE_L1;
596 #define CALLER_SAVE_L1 /* nothing */
597 #define CALLER_RESTORE_L1 /* nothing */
600 #ifdef CALLER_SAVES_Sp
601 #define CALLER_SAVE_Sp SAVE_Sp = Sp;
602 #define CALLER_RESTORE_Sp Sp = SAVE_Sp;
604 #define CALLER_SAVE_Sp /* nothing */
605 #define CALLER_RESTORE_Sp /* nothing */
608 #ifdef CALLER_SAVES_SpLim
609 #define CALLER_SAVE_SpLim SAVE_SpLim = SpLim;
610 #define CALLER_RESTORE_SpLim SpLim = SAVE_SpLim;
612 #define CALLER_SAVE_SpLim /* nothing */
613 #define CALLER_RESTORE_SpLim /* nothing */
616 #ifdef CALLER_SAVES_Hp
617 #define CALLER_SAVE_Hp SAVE_Hp = Hp;
618 #define CALLER_RESTORE_Hp Hp = SAVE_Hp;
620 #define CALLER_SAVE_Hp /* nothing */
621 #define CALLER_RESTORE_Hp /* nothing */
624 #ifdef CALLER_SAVES_HpLim
625 #define CALLER_SAVE_HpLim SAVE_HpLim = HpLim;
626 #define CALLER_RESTORE_HpLim HpLim = SAVE_HpLim;
628 #define CALLER_SAVE_HpLim /* nothing */
629 #define CALLER_RESTORE_HpLim /* nothing */
632 #ifdef CALLER_SAVES_Base
634 #error "Can't have caller-saved BaseReg with THREADED_RTS"
636 #define CALLER_SAVE_Base /* nothing */
637 #define CALLER_RESTORE_Base BaseReg = &MainRegTable;
639 #define CALLER_SAVE_Base /* nothing */
640 #define CALLER_RESTORE_Base /* nothing */
643 #ifdef CALLER_SAVES_CurrentTSO
644 #define CALLER_SAVE_CurrentTSO SAVE_CurrentTSO = CurrentTSO;
645 #define CALLER_RESTORE_CurrentTSO CurrentTSO = SAVE_CurrentTSO;
647 #define CALLER_SAVE_CurrentTSO /* nothing */
648 #define CALLER_RESTORE_CurrentTSO /* nothing */
651 #ifdef CALLER_SAVES_CurrentNursery
652 #define CALLER_SAVE_CurrentNursery SAVE_CurrentNursery = CurrentNursery;
653 #define CALLER_RESTORE_CurrentNursery CurrentNursery = SAVE_CurrentNursery;
655 #define CALLER_SAVE_CurrentNursery /* nothing */
656 #define CALLER_RESTORE_CurrentNursery /* nothing */
659 #ifdef CALLER_SAVES_HpAlloc
660 #define CALLER_SAVE_HpAlloc SAVE_HpAlloc = HpAlloc;
661 #define CALLER_RESTORE_HpAlloc HpAlloc = SAVE_HpAlloc;
663 #define CALLER_SAVE_HpAlloc /* nothing */
664 #define CALLER_RESTORE_HpAlloc /* nothing */
667 #ifdef CALLER_SAVES_SparkHd
668 #define CALLER_SAVE_SparkHd SAVE_SparkHd = SparkHd;
669 #define CALLER_RESTORE_SparkHd SparkHd = SAVE_SparkHd;
671 #define CALLER_SAVE_SparkHd /* nothing */
672 #define CALLER_RESTORE_SparkHd /* nothing */
675 #ifdef CALLER_SAVES_SparkTl
676 #define CALLER_SAVE_SparkTl SAVE_SparkTl = SparkTl;
677 #define CALLER_RESTORE_SparkTl SparkTl = SAVE_SparkTl;
679 #define CALLER_SAVE_SparkTl /* nothing */
680 #define CALLER_RESTORE_SparkTl /* nothing */
683 #ifdef CALLER_SAVES_SparkBase
684 #define CALLER_SAVE_SparkBase SAVE_SparkBase = SparkBase;
685 #define CALLER_RESTORE_SparkBase SparkBase = SAVE_SparkBase;
687 #define CALLER_SAVE_SparkBase /* nothing */
688 #define CALLER_RESTORE_SparkBase /* nothing */
691 #ifdef CALLER_SAVES_SparkLim
692 #define CALLER_SAVE_SparkLim SAVE_SparkLim = SparkLim;
693 #define CALLER_RESTORE_SparkLim SparkLim = SAVE_SparkLim;
695 #define CALLER_SAVE_SparkLim /* nothing */
696 #define CALLER_RESTORE_SparkLim /* nothing */
699 #endif /* IN_STG_CODE */
701 /* ----------------------------------------------------------------------------
702 Handy bunches of saves/restores
703 ------------------------------------------------------------------------ */
707 #define CALLER_SAVE_USER \
724 /* Save Base last, since the others may
725 be addressed relative to it */
726 #define CALLER_SAVE_SYSTEM \
731 CALLER_SAVE_CurrentTSO \
732 CALLER_SAVE_CurrentNursery \
733 CALLER_SAVE_SparkHd \
734 CALLER_SAVE_SparkTl \
735 CALLER_SAVE_SparkBase \
736 CALLER_SAVE_SparkLim \
739 #define CALLER_RESTORE_USER \
756 /* Restore Base first, since the others may
757 be addressed relative to it */
758 #define CALLER_RESTORE_SYSTEM \
759 CALLER_RESTORE_Base \
761 CALLER_RESTORE_SpLim \
763 CALLER_RESTORE_HpLim \
764 CALLER_RESTORE_CurrentTSO \
765 CALLER_RESTORE_CurrentNursery \
766 CALLER_RESTORE_SparkHd \
767 CALLER_RESTORE_SparkTl \
768 CALLER_RESTORE_SparkBase \
769 CALLER_RESTORE_SparkLim
771 #else /* not IN_STG_CODE */
773 #define CALLER_SAVE_USER /* nothing */
774 #define CALLER_SAVE_SYSTEM /* nothing */
775 #define CALLER_RESTORE_USER /* nothing */
776 #define CALLER_RESTORE_SYSTEM /* nothing */
778 #endif /* IN_STG_CODE */
779 #define CALLER_SAVE_ALL \
783 #define CALLER_RESTORE_ALL \
784 CALLER_RESTORE_SYSTEM \