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root/cebix/SheepShaver/src/Unix/ppc_asm.S

Comparing SheepShaver/src/Unix/ppc_asm.S (file contents):
Revision 1.2 by gbeauche, 2005-02-27T21:52:06Z vs.
Revision 1.7 by gbeauche, 2005-06-28T16:47:32Z

#	Line 180 | Line 180 | C_SYMBOL_NAME(test_and_set):
180		isync
181		lwarx   r5,0,r3
182		cmpi    0,r5,0x0000
183	<	beq     1f
183	>	bne     1f
184		stwcx.  r4,0,r3
185		bne-    0b
186		1:      isync
#	Line 245 | Line 245 | C_SYMBOL_NAME(jump_to_rom):
245		// Restore PowerPC registers
246		lwz     r1,XLM_EMUL_RETURN_STACK(0)
247		RESTORE_SYSTEM_R2
248	+	RESTORE_SYSTEM_R13
249		lmw     r13,20(r1)
250		lfd     f14,20+19*4+0*8(r1)
251		lfd     f15,20+19*4+1*8(r1)
#	Line 344 | Line 345 | C_SYMBOL_NAME(jump_to_rom):
345		lwz     r0,56+19*4+18*8+4(r1)
346		mtlr    r0
347		addi    r1,r1,56+19*4+18*8
348	+	RESTORE_SYSTEM_R2
349	+	RESTORE_SYSTEM_R13
350		blr
351
352
#	Line 380 | Line 383 | C_SYMBOL_NAME(jump_to_rom):
383		mfxer   r0
384		stw     r0,16(r1)
385		stw     r2,12(r1)
386	<	stwu    r1,-(24+16*4+15*8)(r1)
384	<	RESTORE_SYSTEM_R2
386	>	stwu    r1,-(56+16*4+15*8)(r1)
387
388		// Save 68k registers (M68kRegisters)
389	<	stw     r8,24+0*4(r1)   // d[0]..d[7]
390	<	stw     r9,24+1*4(r1)
391	<	stw     r10,24+2*4(r1)
392	<	stw     r11,24+3*4(r1)
393	<	stw     r12,24+4*4(r1)
394	<	stw     r13,24+5*4(r1)
395	<	stw     r14,24+6*4(r1)
396	<	stw     r15,24+7*4(r1)
397	<	stw     r16,24+8*4(r1)  // a[0]..a[7]
398	<	stw     r17,24+9*4(r1)
399	<	stw     r18,24+10*4(r1)
400	<	stw     r19,24+11*4(r1)
401	<	stw     r20,24+12*4(r1)
402	<	stw     r21,24+13*4(r1)
403	<	stw     r22,24+14*4(r1)
404	<	stw     r3,24+15*4(r1)
405	<	stfd    f0,24+16*4+0*8(r1)
406	<	stfd    f1,24+16*4+1*8(r1)
407	<	stfd    f2,24+16*4+2*8(r1)
408	<	stfd    f3,24+16*4+3*8(r1)
409	<	stfd    f4,24+16*4+4*8(r1)
410	<	stfd    f5,24+16*4+5*8(r1)
411	<	stfd    f6,24+16*4+6*8(r1)
412	<	stfd    f7,24+16*4+7*8(r1)
389	>	stw     r8,56+0*4(r1)   // d[0]..d[7]
390	>	stw     r9,56+1*4(r1)
391	>	stw     r10,56+2*4(r1)
392	>	stw     r11,56+3*4(r1)
393	>	stw     r12,56+4*4(r1)
394	>	stw     r13,56+5*4(r1)
395	>	stw     r14,56+6*4(r1)
396	>	stw     r15,56+7*4(r1)
397	>	stw     r16,56+8*4(r1)  // a[0]..a[7]
398	>	stw     r17,56+9*4(r1)
399	>	stw     r18,56+10*4(r1)
400	>	stw     r19,56+11*4(r1)
401	>	stw     r20,56+12*4(r1)
402	>	stw     r21,56+13*4(r1)
403	>	stw     r22,56+14*4(r1)
404	>	stw     r3,56+15*4(r1)
405	>	stfd    f0,56+16*4+0*8(r1)
406	>	stfd    f1,56+16*4+1*8(r1)
407	>	stfd    f2,56+16*4+2*8(r1)
408	>	stfd    f3,56+16*4+3*8(r1)
409	>	stfd    f4,56+16*4+4*8(r1)
410	>	stfd    f5,56+16*4+5*8(r1)
411	>	stfd    f6,56+16*4+6*8(r1)
412	>	stfd    f7,56+16*4+7*8(r1)
413		mffs    f0
414	<	stfd    f8,24+16*4+8*8(r1)
415	<	stfd    f9,24+16*4+9*8(r1)
416	<	stfd    f10,24+16*4+10*8(r1)
417	<	stfd    f11,24+16*4+11*8(r1)
418	<	stfd    f12,24+16*4+12*8(r1)
419	<	stfd    f13,24+16*4+13*8(r1)
420	<	stfd    f0,24+16*4+14*8(r1)
414	>	stfd    f8,56+16*4+8*8(r1)
415	>	stfd    f9,56+16*4+9*8(r1)
416	>	stfd    f10,56+16*4+10*8(r1)
417	>	stfd    f11,56+16*4+11*8(r1)
418	>	stfd    f12,56+16*4+12*8(r1)
419	>	stfd    f13,56+16*4+13*8(r1)
420	>	stfd    f0,56+16*4+14*8(r1)
421
422		// Execute native routine
423		RESTORE_SYSTEM_R2
424		RESTORE_SYSTEM_R13
425	<	addi    r3,r1,24
425	>	addi    r3,r1,56
426		mr      r4,r24
427		bl      C_SYMBOL_NAME(EmulOp)
428
429		// Restore 68k registers (M68kRegisters)
430	<	lwz     r8,24+0*4(r1)   // d[0]..d[7]
431	<	lwz     r9,24+1*4(r1)
432	<	lwz     r10,24+2*4(r1)
433	<	lwz     r11,24+3*4(r1)
434	<	lwz     r12,24+4*4(r1)
435	<	lwz     r13,24+5*4(r1)
436	<	lwz     r14,24+6*4(r1)
437	<	lwz     r15,24+7*4(r1)
438	<	lwz     r16,24+8*4(r1)  // a[0]..a[7]
439	<	lwz     r17,24+9*4(r1)
440	<	lwz     r18,24+10*4(r1)
441	<	lwz     r19,24+11*4(r1)
442	<	lwz     r20,24+12*4(r1)
443	<	lwz     r21,24+13*4(r1)
444	<	lwz     r22,24+14*4(r1)
445	<	lwz     r3,24+15*4(r1)
446	<	lfd     f13,24+16*4+14*8(r1)
447	<	lfd     f0,24+16*4+0*8(r1)
448	<	lfd     f1,24+16*4+1*8(r1)
449	<	lfd     f2,24+16*4+2*8(r1)
450	<	lfd     f3,24+16*4+3*8(r1)
451	<	lfd     f4,24+16*4+4*8(r1)
452	<	lfd     f5,24+16*4+5*8(r1)
453	<	lfd     f6,24+16*4+6*8(r1)
454	<	lfd     f7,24+16*4+7*8(r1)
430	>	lwz     r8,56+0*4(r1)   // d[0]..d[7]
431	>	lwz     r9,56+1*4(r1)
432	>	lwz     r10,56+2*4(r1)
433	>	lwz     r11,56+3*4(r1)
434	>	lwz     r12,56+4*4(r1)
435	>	lwz     r13,56+5*4(r1)
436	>	lwz     r14,56+6*4(r1)
437	>	lwz     r15,56+7*4(r1)
438	>	lwz     r16,56+8*4(r1)  // a[0]..a[7]
439	>	lwz     r17,56+9*4(r1)
440	>	lwz     r18,56+10*4(r1)
441	>	lwz     r19,56+11*4(r1)
442	>	lwz     r20,56+12*4(r1)
443	>	lwz     r21,56+13*4(r1)
444	>	lwz     r22,56+14*4(r1)
445	>	lwz     r3,56+15*4(r1)
446	>	lfd     f13,56+16*4+14*8(r1)
447	>	lfd     f0,56+16*4+0*8(r1)
448	>	lfd     f1,56+16*4+1*8(r1)
449	>	lfd     f2,56+16*4+2*8(r1)
450	>	lfd     f3,56+16*4+3*8(r1)
451	>	lfd     f4,56+16*4+4*8(r1)
452	>	lfd     f5,56+16*4+5*8(r1)
453	>	lfd     f6,56+16*4+6*8(r1)
454	>	lfd     f7,56+16*4+7*8(r1)
455		mtfsf   0xff,f13
456	<	lfd     f8,24+16*4+8*8(r1)
457	<	lfd     f9,24+16*4+9*8(r1)
458	<	lfd     f10,24+16*4+10*8(r1)
459	<	lfd     f11,24+16*4+11*8(r1)
460	<	lfd     f12,24+16*4+12*8(r1)
461	<	lfd     f13,24+16*4+13*8(r1)
456	>	lfd     f8,56+16*4+8*8(r1)
457	>	lfd     f9,56+16*4+9*8(r1)
458	>	lfd     f10,56+16*4+10*8(r1)
459	>	lfd     f11,56+16*4+11*8(r1)
460	>	lfd     f12,56+16*4+12*8(r1)
461	>	lfd     f13,56+16*4+13*8(r1)
462
463		// Delete PowerPC stack frame
464	<	lwz     r2,24+16*4+15*8+12(r1)
465	<	lwz     r0,24+16*4+15*8+16(r1)
464	>	lwz     r2,56+16*4+15*8+12(r1)
465	>	lwz     r0,56+16*4+15*8+16(r1)
466		mtxer   r0
467	<	lwz     r0,24+16*4+15*8+4(r1)
467	>	lwz     r0,56+16*4+15*8+4(r1)
468		mtcrf   0xff,r0
469		mr      r1,r3
470
#	Line 595 | Line 597 | ASM_MACRO_START        prolog
597		ASM_MACRO_END
598
599		ASM_MACRO_START epilog
598	–	RESTORE_SYSTEM_R2
599	–	RESTORE_SYSTEM_R13
600		lwz     r0,64+4(r1)
601		mtlr    r0
602		addi    r1,r1,64
603	+	RESTORE_SYSTEM_R2
604	+	RESTORE_SYSTEM_R13
605		blr
606		ASM_MACRO_END
607
#	Line 708 | Line 710 | C_SYMBOL_NAME(call_macos7):
710		*  Native resource manager patches
711		*/
712
713	<	ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(get_resource)
712	<	C_SYMBOL_NAME(get_resource):
713	>	ASM_MACRO_START do_get_resource ASM_MACRO_ARG0_DEF
714		// Create stack frame
715		mflr    r0
716		stw     r0,8(r1)
#	Line 720 | Line 721 | C_SYMBOL_NAME(get_resource):
721		stw     r4,56+4(r1)
722
723		// Call old routine
724	<	lwz     r0,XLM_GET_RESOURCE(0)
724	>	lwz     r0,ASM_MACRO_ARG0(0)
725		lwz     r2,XLM_RES_LIB_TOC(0)
726		mtctr   r0
727		bctrl
727	–	RESTORE_SYSTEM_R2
728		stw     r3,56+8(r1)             // Save handle
729
730		// Call CheckLoad
731	+	RESTORE_SYSTEM_R2
732	+	RESTORE_SYSTEM_R13
733		lwz     r3,56(r1)
734		lha     r4,56+6(r1)
735		lwz     r5,56+8(r1)
#	Line 739 | Line 741 | C_SYMBOL_NAME(get_resource):
741		mtlr    r0
742		addi    r1,r1,56+12
743		blr
744	+	ASM_MACRO_END
745	+
746	+	ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(get_resource)
747	+	C_SYMBOL_NAME(get_resource):
748	+	do_get_resource XLM_GET_RESOURCE
749
750		ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(get_1_resource)
751		C_SYMBOL_NAME(get_1_resource):
752	<	// Create stack frame
746	<	mflr    r0
747	<	stw     r0,8(r1)
748	<	stwu    r1,-(56+12)(r1)
749	<
750	<	// Save type/ID
751	<	stw     r3,56(r1)
752	<	stw     r4,56+4(r1)
753	<
754	<	// Call old routine
755	<	lwz     r0,XLM_GET_1_RESOURCE(0)
756	<	lwz     r2,XLM_RES_LIB_TOC(0)
757	<	mtctr   r0
758	<	bctrl
759	<	RESTORE_SYSTEM_R2
760	<	stw     r3,56+8(r1)             // Save handle
761	<
762	<	// Call CheckLoad
763	<	lwz     r3,56(r1)
764	<	lha     r4,56+6(r1)
765	<	lwz     r5,56+8(r1)
766	<	bl      C_SYMBOL_NAME(check_load_invoc)
767	<	lwz     r3,56+8(r1)             // Restore handle
768	<
769	<	// Return to caller
770	<	lwz     r0,56+12+8(r1)
771	<	mtlr    r0
772	<	addi    r1,r1,56+12
773	<	blr
752	>	do_get_resource XLM_GET_1_RESOURCE
753
754		ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(get_ind_resource)
755		C_SYMBOL_NAME(get_ind_resource):
756	<	// Create stack frame
778	<	mflr    r0
779	<	stw     r0,8(r1)
780	<	stwu    r1,-(56+12)(r1)
781	<
782	<	// Save type/index
783	<	stw     r3,56(r1)
784	<	stw     r4,56+4(r1)
785	<
786	<	// Call old routine
787	<	lwz     r0,XLM_GET_IND_RESOURCE(0)
788	<	lwz     r2,XLM_RES_LIB_TOC(0)
789	<	mtctr   r0
790	<	bctrl
791	<	RESTORE_SYSTEM_R2
792	<	stw     r3,56+8(r1)             // Save handle
793	<
794	<	// Call CheckLoad
795	<	lwz     r3,56(r1)
796	<	lha     r4,56+6(r1)
797	<	lwz     r5,56+8(r1)
798	<	bl      C_SYMBOL_NAME(check_load_invoc)
799	<	lwz     r3,56+8(r1)             // Restore handle
800	<
801	<	// Return to caller
802	<	lwz     r0,56+12+8(r1)
803	<	mtlr    r0
804	<	addi    r1,r1,56+12
805	<	blr
756	>	do_get_resource XLM_GET_IND_RESOURCE
757
758		ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(get_1_ind_resource)
759		C_SYMBOL_NAME(get_1_ind_resource):
760	<	// Create stack frame
810	<	mflr    r0
811	<	stw     r0,8(r1)
812	<	stwu    r1,-(56+12)(r1)
813	<
814	<	// Save type/index
815	<	stw     r3,56(r1)
816	<	stw     r4,56+4(r1)
817	<
818	<	// Call old routine
819	<	lwz     r0,XLM_GET_1_IND_RESOURCE(0)
820	<	lwz     r2,XLM_RES_LIB_TOC(0)
821	<	mtctr   r0
822	<	bctrl
823	<	RESTORE_SYSTEM_R2
824	<	stw     r3,56+8(r1)             // Save handle
825	<
826	<	// Call CheckLoad
827	<	lwz     r3,56(r1)
828	<	lha     r4,56+6(r1)
829	<	lwz     r5,56+8(r1)
830	<	bl      C_SYMBOL_NAME(check_load_invoc)
831	<	lwz     r3,56+8(r1)             // Restore handle
832	<
833	<	// Return to caller
834	<	lwz     r0,56+12+8(r1)
835	<	mtlr    r0
836	<	addi    r1,r1,56+12
837	<	blr
760	>	do_get_resource XLM_GET_1_IND_RESOURCE
761
762		ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(r_get_resource)
763		C_SYMBOL_NAME(r_get_resource):
764	<	// Create stack frame
842	<	mflr    r0
843	<	stw     r0,8(r1)
844	<	stwu    r1,-(56+12)(r1)
845	<
846	<	// Save type/ID
847	<	stw     r3,56(r1)
848	<	stw     r4,56+4(r1)
849	<
850	<	// Call old routine
851	<	lwz     r0,XLM_R_GET_RESOURCE(0)
852	<	lwz     r2,XLM_RES_LIB_TOC(0)
853	<	mtctr   r0
854	<	bctrl
855	<	RESTORE_SYSTEM_R2
856	<	stw     r3,56+8(r1)             // Save handle
857	<
858	<	// Call CheckLoad
859	<	lwz     r3,56(r1)
860	<	lha     r4,56+6(r1)
861	<	lwz     r5,56+8(r1)
862	<	bl      C_SYMBOL_NAME(check_load_invoc)
863	<	lwz     r3,56+8(r1)             // Restore handle
864	<
865	<	// Return to caller
866	<	lwz     r0,56+12+8(r1)
867	<	mtlr    r0
868	<	addi    r1,r1,56+12
869	<	blr
764	>	do_get_resource XLM_R_GET_RESOURCE
765
766
767		/*
#	Line 919 | Line 814 | C_SYMBOL_NAME(ppc_interrupt):
814
815
816		/*
817	<	*  Glue for glibc with TLS support which clobbers r2
923	<	*
924	<	*  The following is derived from dietlibc and only provides
925	<	*  pass-through to kernel syscalls. You also lose asynchronous
926	<	*  cancellation support.
817	>	*  Define signal handlers with alternate stack initialization magic
818		*/
819
820	<	#if defined(__linux__)
821	<	#define __NR_getpid             20
822	<	#define __NR__newselect         142
823	<
824	<	#define syscall_weak(name,wsym,sym) \
825	<	.text; \
826	<	.type wsym,@function; \
827	<	.weak wsym; \
828	<	wsym: ; \
829	<	.type sym,@function; \
830	<	.global sym; \
831	<	sym: \
832	<	li      0,__NR_##name; \
833	<	b       __unified_syscall
834	<
835	<	#define syscall(name,sym) \
836	<	.text; \
837	<	.type sym,@function; \
838	<	.global sym; \
839	<	sym: \
840	<	li      0,__NR_##name; \
841	<	b       __unified_syscall
842	<
843	<
844	<	.type __unified_syscall,@function
845	<	__unified_syscall:
846	<	sc
847	<	bnslr+
848	<	stwu    1,-16(1)
849	<	mflr    0
850	<	stw     0,20(1)
851	<	stw     3,12(1)
852	<	bl      __errno_location
853	<	lwz     0,12(1)
854	<	stw     0,0(3)
855	<	lwz     0,20(1)
856	<	mtlr    0
857	<	addi    1,1,16
858	<	blr
859	<
860	<	/*              name            weak symbol     symbol          */
861	<	syscall(        getpid,         getpid)
862	<	syscall_weak(   _newselect,     select,         __select)
863	<	#endif
820	>	#define SIG_STACK_SIZE 0x10000
821	>
822	>	ASM_MACRO_START do_define_signal_handler        \
823	>	ASM_MACRO_ARG0_DEF /* name */           \
824	>	ASM_MACRO_ARG1_DEF /* stack */          \
825	>	ASM_MACRO_ARG2_DEF /* stack id */       \
826	>	ASM_MACRO_ARG3_DEF /* signal handler */
827	>
828	>	// Alternate stack lower base for this signal handler
829	>	.lcomm ASM_MACRO_ARG1,SIG_STACK_SIZE,ASM_ALIGN_2(4)
830	>	ASM_TYPE(ASM_MACRO_ARG1,@object)
831	>
832	>	// Represents the current nest level for this signal handler
833	>	// Note that in SheepShaver, SIGUSR2 signals are blocked while
834	>	// handling other signals so, it's unlikely we ever get a nest
835	>	// level greater than 1
836	>	.lcomm ASM_MACRO_ARG2,4,ASM_ALIGN_2(2)
837	>	ASM_TYPE(ASM_MACRO_ARG2,@object)
838	>
839	>	ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(ASM_MACRO_ARG0)
840	>	C_SYMBOL_NAME(ASM_MACRO_ARG0):
841	>	// Preserve args in scratch registers
842	>	mflr    r14
843	>	mr      r15,r3
844	>	mr      r16,r4
845	>	mr      r17,r5
846	>	mr      r18,r1
847	>
848	>	// Atomically increase stack_id
849	>	lis     r19,ASM_HA16(ASM_MACRO_ARG2)
850	>	la      r19,ASM_LO16(ASM_MACRO_ARG2,r19)
851	>	li      r4,1
852	>	mr      r3,r19
853	>	bl      C_SYMBOL_NAME(atomic_add)
854	>	cmpwi   r3,0
855	>	bne-    1f
856	>
857	>	// ID was 0, we can use the local stack
858	>	lis     r9,ASM_HA16(ASM_MACRO_ARG1)
859	>	lis     r3,(SIG_STACK_SIZE>>16)
860	>	la      r9,ASM_LO16(ASM_MACRO_ARG1,r9)
861	>	addi    r3,r3,((SIG_STACK_SIZE&0xffff)-64)
862	>	add     r1,r9,r3
863	>
864	>	1:      // Invoke signal handler
865	>	stwu    r1,-16(r1)
866	>	mr      r3,r15
867	>	mr      r4,r16
868	>	mr      r5,r17
869	>	bl      C_SYMBOL_NAME(ASM_MACRO_ARG3)
870	>	addi    r1,r1,16
871	>
872	>	// Atomically decrease stack id
873	>	mr      r3,r19
874	>	li      r4,-1
875	>	bl      C_SYMBOL_NAME(atomic_add)
876	>
877	>	// Restore kernel stack and return
878	>	mtlr    r14
879	>	mr      r1,r18
880	>	blr
881	>	ASM_MACRO_END
882	>
883	>	#define DEFINE_SIGNAL_HANDLER(NAME)               \
884	>	do_define_signal_handler                  \
885	>	NAME##_handler_init     ASM_MACRO_ARG_SEP \
886	>	NAME##_stack            ASM_MACRO_ARG_SEP \
887	>	NAME##_stack_id         ASM_MACRO_ARG_SEP \
888	>	NAME##_handler
889	>
890	>	DEFINE_SIGNAL_HANDLER(sigusr2)

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