/* jit/alpha/asmpart.S - Java-C interface functions for alpha Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Institut f. Computersprachen, TU Wien R. Grafl, A. Krall, C. Kruegel, C. Oates, R. Obermaisser, M. Probst, S. Ring, E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, J. Wenninger This file is part of CACAO. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. Contact: cacao@complang.tuwien.ac.at Authors: Andreas Krall Reinhard Grafl $Id: asmpart.S 963 2004-03-15 07:37:49Z jowenn $ */ #include "offsets.h" #define v0 $0 #define t0 $1 #define t1 $2 #define t2 $3 #define t3 $4 #define t4 $5 #define t5 $6 #define t6 $7 #define t7 $8 #define s0 $9 #define s1 $10 #define s2 $11 #define s3 $12 #define s4 $13 #define s5 $14 #define s6 $15 #define a0 $16 #define a1 $17 #define a2 $18 #define a3 $19 #define a4 $20 #define a5 $21 #define t8 $22 #define t9 $23 #define t10 $24 #define t11 $25 #define ra $26 #define t12 $27 #define pv t12 #define AT $at #define gp $29 #define sp $30 #define zero $31 #define itmp1 $25 #define itmp2 $28 #define itmp3 $29 #define xptr itmp1 #define xpc itmp2 #define sf0 $f2 #define sf1 $f3 #define sf2 $f4 #define sf3 $f5 #define sf4 $f6 #define sf5 $f7 #define sf6 $f8 #define sf7 $f9 #define fzero $f31 #define PAL_imb 134 .text .set noat .set noreorder /********************* exported functions and variables ***********************/ .globl has_no_x_instr_set .globl synchronize_caches .globl asm_calljavafunction .globl asm_calljavafunction2 .globl asm_calljavafunction2double .globl asm_calljavafunction2long .globl asm_call_jit_compiler .globl asm_dumpregistersandcall .globl asm_handle_exception .globl asm_handle_nat_exception .globl asm_check_clinit .globl asm_builtin_checkcast .globl asm_builtin_checkarraycast .globl asm_builtin_aastore .globl asm_builtin_monitorenter .globl asm_builtin_monitorexit .globl asm_builtin_idiv .globl asm_builtin_irem .globl asm_builtin_ldiv .globl asm_builtin_lrem .globl asm_perform_threadswitch .globl asm_initialize_thread_stack .globl asm_switchstackandcall .globl asm_getcallingmethod .globl asm_builtin_trace .globl asm_builtin_exittrace /*************************** imported functions *******************************/ .globl jit_compile .globl builtin_monitorexit .globl builtin_throw_exception .globl builtin_trace_exception .globl class_java_lang_Object /*********************** function has_no_x_instr_set *************************** * * * determines if the byte support instruction set (21164a and higher) * * is available. * * * *******************************************************************************/ .ent has_no_x_instr_set has_no_x_instr_set: .long 0x47e03c20 /* amask 1,v0 */ jmp zero,(ra) /* return */ .end has_no_x_instr_set /********************* function synchronize_caches ****************************/ .ent synchronize_caches synchronize_caches: call_pal PAL_imb /* synchronise instruction cache */ jmp zero,(ra) /* return */ .end synchronize_caches #define MethodPointer -8 #define FrameSize -12 #define IsSync -16 #define IsLeaf -20 #define IntSave -24 #define FltSave -28 #define LineNumberTableSize -32 #define LineNumberTableStart -40 #define ExTableSize -48 #define ExTableStart -48 #define ExEntrySize -32 #define ExStartPC -8 #define ExEndPC -16 #define ExHandlerPC -24 #define ExCatchType -32 #define LineEntrySize -16 #define LinePC 0 #define LineLine -8 /********************* function asm_calljavafunction *************************** * * * This function calls a Java-method (which possibly needs compilation) * * with up to 4 address parameters. * * * * This functions calls the JIT-compiler which eventually translates the * * method into machine code. * * * * C-prototype: * * javaobject_header *asm_calljavafunction (methodinfo *m, * * void *arg1, void *arg2, void *arg3, void *arg4); * * * *******************************************************************************/ .ent asm_calljavafunction call_name: .ascii "calljavafunction\0\0" .align 3 .quad 0 /* catch type all */ .quad calljava_xhandler /* handler pc */ .quad calljava_xhandler /* end pc */ .quad asm_calljavafunction /* start pc */ .long 1 /* extable size */ .quad 0 /* line number table start */ .quad 0 /* line number table size */ .long 0 /* fltsave */ .long 0 /* intsave */ .long 0 /* isleaf */ .long 0 /* IsSync */ .long 32 /* frame size */ .quad 0 /* method pointer (pointer to name) */ asm_calljavafunction: ldgp gp,0(pv) lda sp,-32(sp) /* allocate stack space */ stq gp,24(sp) /* save global pointer */ stq ra,0(sp) /* save return address */ stq a0,16(sp) /* save method pointer for compiler */ lda v0,16(sp) /* pass pointer to method pointer via v0*/ mov a1,a0 /* pass the remaining parameters */ mov a2,a1 mov a3,a2 mov a4,a3 lda $28,asm_call_jit_compiler /* fake virtual function call (2 instr) */ stq $28,8(sp) /* store function address */ mov sp,$28 /* set method pointer */ ldq pv,8($28) /* method call as in Java */ jmp ra,(pv) /* call JIT compiler */ calljava_jit: lda pv,-64(ra) /* asm_calljavafunction-calljava_jit !!!!!*/ calljava_return: ldq ra,0(sp) /* restore return address */ ldq gp,24(sp) /* restore global pointer */ lda sp,32(sp) /* free stack space */ calljava_ret: jmp zero,(ra) calljava_xhandler: ldq gp,24(sp) /* restore global pointer */ mov itmp1,a0 jsr ra,builtin_throw_exception ldq ra,0(sp) /* restore return address */ lda sp,32(sp) /* free stack space */ jmp zero,(ra) .end asm_calljavafunction .ent asm_calljavafunction2 call_name2: .ascii "calljavafunction2\0\0" .align 3 .quad 0 /* catch type all */ .quad calljava_xhandler2 /* handler pc */ .quad calljava_xhandler2 /* end pc */ .quad asm_calljavafunction2 /* start pc */ .long 1 /* extable size */ .quad 0 /* line number table start */ .quad 0 /* line number table size */ .long 0 /* fltsave */ .long 1 /* intsave */ .long 0 /* isleaf */ .long 0 /* IsSync */ .long 40 /* frame size */ .quad 0 /* method pointer (pointer to name) */ asm_calljavafunction2: asm_calljavafunction2double: asm_calljavafunction2long: ldgp gp,0(pv) lda sp,-40(sp) /* allocate stack space */ stq ra,0(sp) /* save return address */ stq s6,24(sp) stq gp,8(sp) /* save global pointer */ stq a0,32(sp) /* save method pointer for compiler */ mov a3,t0 /* pointer to arg block */ mov a1,s6 /* arg count */ ble s6,calljava_argsloaded lda s6,-1(s6) ldq a0,offjniitem(t0) ldt $f16,offjniitem(t0) ble s6,calljava_argsloaded lda s6,-1(s6) ldq a1,offjniitem+sizejniblock*1(t0) ldt $f17,offjniitem+sizejniblock*1(t0) ble s6,calljava_argsloaded lda s6,-1(s6) ldq a2,offjniitem+sizejniblock*2(t0) ldt $f18,offjniitem+sizejniblock*2(t0) ble s6,calljava_argsloaded lda s6,-1(s6) ldq a3,offjniitem+sizejniblock*3(t0) ldt $f19,offjniitem+sizejniblock*3(t0) ble s6,calljava_argsloaded lda s6,-1(s6) ldq a4,offjniitem+sizejniblock*4(t0) ldt $f20,offjniitem+sizejniblock*4(t0) ble s6,calljava_argsloaded lda s6,-1(s6) ldq a5,offjniitem+sizejniblock*5(t0) ldt $f21,offjniitem+sizejniblock*5(t0) calljava_argsloaded: mov sp,t4 ble s6,calljava_nocopy negq s6,t1 s8addq t1,sp,sp s8addq t1,t4,t2 calljava_copyloop: ldq t3,offjniitem+sizejniblock*6(t0) stq t3,0(t2) lda t1,1(t1) lda t0,sizejniblock(t0) lda t2,8(t2) bne t1,calljava_copyloop calljava_nocopy: lda v0,32(t4) /* pass pointer to method pointer via v0*/ lda $28,asm_call_jit_compiler /* fake virtual function call (2 instr) */ stq $28,16(t4) /* store function address */ lda $28,8(t4) /* set method pointer */ ldq pv,8($28) /* method call as in Java */ jmp ra,(pv) /* call JIT compiler */ calljava_jit2: lda pv,-200(ra) /* asm_calljavafunction-calljava_jit !!!*/ s8addq s6,sp,sp calljava_return2: ldq ra,0(sp) /* restore return address */ ldq gp,8(sp) /* restore global pointer */ ldq s6,24(sp) lda sp,40(sp) /* free stack space */ calljava_ret2: jmp zero,(ra) calljava_xhandler2: s8addq s6,sp,sp ldq gp,8(sp) /* restore global pointer */ mov itmp1,a0 jsr ra,builtin_throw_exception ldq ra,0(sp) /* restore return address */ ldq s6,24(sp) lda sp,40(sp) /* free stack space */ jmp zero,(ra) .end asm_calljavafunction2 /****************** function asm_call_jit_compiler ***************************** * * * invokes the compiler for untranslated JavaVM methods. * * * * Register R0 contains a pointer to the method info structure (prepared * * by createcompilerstub). Using the return address in R26 and the * * offset in the LDA instruction or using the value in methodptr R28 the * * patching address for storing the method address can be computed: * * * * method address was either loaded using * * M_LDQ (REG_PV, REG_PV, a) ; invokestatic/special ($27) * * M_LDA (REG_PV, REG_RA, low) * * M_LDAH(REG_PV, REG_RA, high) ; optional * * or * * M_LDQ (REG_PV, REG_METHODPTR, m) ; invokevirtual/interface ($28) * * in the static case the method pointer can be computed using the * * return address and the lda function following the jmp instruction * * * *******************************************************************************/ .ent asm_call_jit_compiler asm_call_jit_compiler: ldgp gp,0(pv) ldl t8,-8(ra) /* load instruction LDQ PV,xxx($yy) */ srl t8,16,t8 /* shift right register number $yy */ and t8,31,t8 /* isolate register number */ subl t8,28,t8 /* test for REG_METHODPTR */ beq t8,noregchange ldl t8,0(ra) /* load instruction LDA PV,xxx(RA) */ sll t8,48,t8 sra t8,48,t8 /* isolate offset */ addq t8,ra,$28 /* compute update address */ ldl t8,4(ra) /* load instruction LDAH PV,xxx(PV) */ srl t8,16,t8 /* isolate instruction code */ lda t8,-0x177b(t8) /* test for LDAH */ bne t8,noregchange ldl t8,4(ra) /* load instruction LDAH PV,xxx(PV) */ sll t8,16,t8 /* compute high offset */ addl t8,0,t8 /* sign extend high offset */ addq t8,$28,$28 /* compute update address */ noregchange: lda sp,-14*8(sp) /* reserve stack space */ stq a0,0*8(sp) /* save all argument registers */ stq a1,1*8(sp) /* they could be used by method */ stq a2,2*8(sp) stq a3,3*8(sp) stq a4,4*8(sp) stq a5,5*8(sp) stt $f16,6*8(sp) stt $f17,7*8(sp) stt $f18,8*8(sp) stt $f19,9*8(sp) stt $f20,10*8(sp) stt $f21,11*8(sp) stq $28,12*8(sp) /* save method pointer */ stq ra,13*8(sp) /* save return address */ ldq a0,0(v0) /* pass 'methodinfo' pointer to */ jsr ra,jit_compile /* jit compiler */ ldgp gp,0(ra) call_pal PAL_imb /* synchronise instruction cache */ ldq a0,0*8(sp) /* load argument registers */ ldq a1,1*8(sp) ldq a2,2*8(sp) ldq a3,3*8(sp) ldq a4,4*8(sp) ldq a5,5*8(sp) ldt $f16,6*8(sp) ldt $f17,7*8(sp) ldt $f18,8*8(sp) ldt $f19,9*8(sp) ldt $f20,10*8(sp) ldt $f21,11*8(sp) ldq $28,12*8(sp) /* load method pointer */ ldq ra,13*8(sp) /* load return address */ lda sp,14*8(sp) /* deallocate stack area */ ldl t8,-8(ra) /* load instruction LDQ PV,xxx($yy) */ sll t8,48,t8 sra t8,48,t8 /* isolate offset */ addq t8,$28,t8 /* compute update address via method pointer*/ stq v0,0(t8) /* save new method address there */ mov v0,pv /* load method address into pv */ jmp zero,(pv) /* and call method. The method returns */ /* directly to the caller (ra). */ .end asm_call_jit_compiler /****************** function asm_dumpregistersandcall ************************** * * * This funtion saves all callee saved registers and calls the function * * which is passed as parameter. * * * * This function is needed by the garbage collector, which needs to access * * all registers which are stored on the stack. Unused registers are * * cleared to avoid interferances with the GC. * * * * void asm_dumpregistersandcall (functionptr f); * * * *******************************************************************************/ .ent asm_dumpregistersandcall asm_dumpregistersandcall: lda sp,-16*8(sp) /* allocate stack */ stq ra,0(sp) /* save return address */ stq s0,1*8(sp) /* save all callee saved registers */ stq s1,2*8(sp) /* intialize the remaining registers */ stq s2,3*8(sp) stq s3,4*8(sp) stq s4,5*8(sp) stq s5,6*8(sp) stq s6,7*8(sp) stt $f2,8*8(sp) stt $f3,9*8(sp) stt $f4,10*8(sp) stt $f5,11*8(sp) stt $f6,12*8(sp) stt $f7,13*8(sp) stt $f8,14*8(sp) stt $f9,15*8(sp) clr v0 /* intialize the remaining registers */ clr t0 clr t1 clr t2 clr t3 clr t4 clr t5 clr t6 clr t7 clr a1 clr a2 clr a3 clr a4 clr a5 clr t8 clr t9 clr t10 clr t11 clr t12 clr $28 clr $29 cpys $f31,$f31,$f0 cpys $f31,$f31,$f1 cpys $f31,$f31,$f10 cpys $f31,$f31,$f11 cpys $f31,$f31,$f12 cpys $f31,$f31,$f13 cpys $f31,$f31,$f14 cpys $f31,$f31,$f15 cpys $f31,$f31,$f16 cpys $f31,$f31,$f17 cpys $f31,$f31,$f18 cpys $f31,$f31,$f19 cpys $f31,$f31,$f20 cpys $f31,$f31,$f21 cpys $f31,$f31,$f22 cpys $f31,$f31,$f23 cpys $f31,$f31,$f24 cpys $f31,$f31,$f25 cpys $f31,$f31,$f26 cpys $f31,$f31,$f27 cpys $f31,$f31,$f28 cpys $f31,$f31,$f29 cpys $f31,$f31,$f30 mov a0,pv /* load function pointer */ jmp ra,(pv) /* and call function */ ldq ra,0(sp) /* load return address */ lda sp,16*8(sp) /* deallocate stack */ jmp zero,(ra) /* return */ .end asm_dumpregistersandcall /********************* function asm_handle_exception *************************** * * * This function handles an exception. It does not use the usual calling * * conventions. The exception pointer is passed in REG_ITMP1 and the * * pc from the exception raising position is passed in REG_ITMP2. It searches * * the local exception table for a handler. If no one is found, it unwinds * * stacks and continues searching the callers. * * * * void asm_handle_exception (exceptionptr, exceptionpc); * * * *******************************************************************************/ .ent asm_handle_nat_exception asm_handle_nat_exception: ldl t0,0(ra) /* load instruction LDA PV,xxx(RA) */ sll t0,48,t0 sra t0,48,t0 /* isolate offset */ addq t0,ra,pv /* compute update address */ ldl t0,4(ra) /* load instruction LDAH PV,xxx(PV) */ srl t0,16,t0 /* isolate instruction code */ lda t0,-0x177b(t0) /* test for LDAH */ bne t0,asm_handle_exception ldl t0,4(ra) /* load instruction LDAH PV,xxx(PV) */ sll t0,16,t0 /* compute high offset */ addl t0,0,t0 /* sign extend high offset */ addq t0,pv,pv /* compute update address */ .aent asm_handle_exception asm_handle_exception: lda sp,-18*8(sp) /* allocate stack */ stq t0,0*8(sp) /* save possible used registers */ stq t1,1*8(sp) /* also registers used by trace_exception */ stq t2,2*8(sp) stq t3,3*8(sp) stq t4,4*8(sp) stq t5,5*8(sp) stq t6,6*8(sp) stq t7,7*8(sp) stq t8,8*8(sp) stq t9,9*8(sp) stq t10,10*8(sp) stq v0,11*8(sp) stq a0,12*8(sp) stq a1,13*8(sp) stq a2,14*8(sp) stq a3,15*8(sp) stq a4,16*8(sp) stq a5,17*8(sp) lda t3,1(zero) /* set no unwind flag */ ex_stack_loop: lda sp,-5*8(sp) /* allocate stack */ stq xptr,0*8(sp) /* save used register */ stq xpc,1*8(sp) stq pv,2*8(sp) stq ra,3*8(sp) stq t3,4*8(sp) mov xptr,a0 ldq a1,MethodPointer(pv) mov xpc,a2 /* mov t3,a3 */ lda a3,1(zero) br ra,ex_trace /* set ra for gp loading */ ex_trace: ldgp gp,0(ra) /* load gp */ jsr ra,builtin_trace_exception /* trace_exception(xptr,methodptr) */ ldq xptr,0*8(sp) /* restore used register */ ldq xpc,1*8(sp) ldq pv,2*8(sp) ldq ra,3*8(sp) ldq t3,4*8(sp) lda sp,5*8(sp) /* deallocate stack */ ldl t0,ExTableSize(pv) /* t0 = exception table size */ beq t0,empty_table /* if empty table skip */ lda t1,ExTableStart(pv) /* t1 = start of exception table */ ex_table_loop: ldq t2,ExStartPC(t1) /* t2 = exception start pc */ cmple t2,xpc,t2 /* t2 = (startpc <= xpc) */ beq t2,ex_table_cont /* if (false) continue */ ldq t2,ExEndPC(t1) /* t2 = exception end pc */ cmplt xpc,t2,t2 /* t2 = (xpc < endpc) */ beq t2,ex_table_cont /* if (false) continue */ ldq a1,ExCatchType(t1) /* arg1 = exception catch type */ beq a1,ex_handle_it /* NULL catches everything */ ldq a0,offobjvftbl(xptr) /* a0 = vftblptr(xptr) */ ldq a1,offclassvftbl(a1) /* a1 = vftblptr(catchtype) class (not obj) */ ldl a0,offbaseval(a0) /* a0 = baseval(xptr) */ ldl v0,offbaseval(a1) /* a2 = baseval(catchtype) */ ldl a1,offdiffval(a1) /* a1 = diffval(catchtype) */ subl a0,v0,a0 /* a0 = baseval(xptr) - baseval(catchtype) */ cmpule a0,a1,v0 /* v0 = xptr is instanceof catchtype */ beq v0,ex_table_cont /* if (false) continue */ ex_handle_it: ldq xpc,ExHandlerPC(t1) /* xpc = exception handler pc */ beq t3,ex_jump /* if (!(no stack unwinding) skip */ ldq t0,0*8(sp) /* restore possible used registers */ ldq t1,1*8(sp) /* also registers used by trace_exception */ ldq t2,2*8(sp) ldq t3,3*8(sp) ldq t4,4*8(sp) ldq t5,5*8(sp) ldq t6,6*8(sp) ldq t7,7*8(sp) ldq t8,8*8(sp) ldq t9,9*8(sp) ldq t10,10*8(sp) ldq v0,11*8(sp) ldq a0,12*8(sp) ldq a1,13*8(sp) ldq a2,14*8(sp) ldq a3,15*8(sp) ldq a4,16*8(sp) ldq a5,17*8(sp) lda sp,18*8(sp) /* deallocate stack */ ex_jump: jmp zero,(xpc) /* jump to the handler */ ex_table_cont: lda t1,ExEntrySize(t1) /* next exception table entry */ subl t0,1,t0 /* decrement entry counter */ bgt t0,ex_table_loop /* if (t0 > 0) next entry */ empty_table: beq t3,ex_already_cleared /* if here the first time, then */ lda sp,18*8(sp) /* deallocate stack and */ clr t3 /* clear the no unwind flag */ ex_already_cleared: ldl t0,IsSync(pv) /* t0 = SyncOffset */ beq t0,no_monitor_exit /* if zero no monitorexit */ addq sp,t0,t0 /* add stackptr to Offset */ ldq a0,-8(t0) /* load monitorexit pointer */ lda sp,-7*8(sp) /* allocate stack */ stq t0,0*8(sp) /* save used register */ stq t1,1*8(sp) stq t3,2*8(sp) stq xptr,3*8(sp) stq xpc,4*8(sp) stq pv,5*8(sp) stq ra,6*8(sp) br ra,ex_mon_load /* set ra for gp loading */ ex_mon_load: ldgp gp,0(ra) /* load gp */ jsr ra,builtin_monitorexit/* builtin_monitorexit(objectptr) */ ldq t0,0*8(sp) /* restore used register */ ldq t1,1*8(sp) ldq t3,2*8(sp) ldq xptr,3*8(sp) ldq xpc,4*8(sp) ldq pv,5*8(sp) ldq ra,6*8(sp) lda sp,7*8(sp) /* deallocate stack */ no_monitor_exit: ldl t0,FrameSize(pv) /* t0 = frame size */ addq sp,t0,sp /* unwind stack */ mov sp,t0 /* t0 = pointer to save area */ ldl t1,IsLeaf(pv) /* t1 = is leaf procedure */ bne t1,ex_no_restore /* if (leaf) skip */ ldq ra,-8(t0) /* restore ra */ lda t0,-8(t0) /* t0-- */ ex_no_restore: mov ra,xpc /* the new xpc is ra */ ldl t1,IntSave(pv) /* t1 = saved int register count */ br t2,ex_int1 /* t2 = current pc */ ex_int1: lda t2,44(t2) /* lda t2,ex_int2-ex_int1(t2) !!!!!!!!!!!!! */ negl t1,t1 /* negate register count */ s4addq t1,t2,t2 /* t2 = ex_int_sav - 4 * register count */ jmp zero,(t2) /* jump to save position */ ldq s0,-56(t0) ldq s1,-48(t0) ldq s2,-40(t0) ldq s3,-32(t0) ldq s4,-24(t0) ldq s5,-16(t0) ldq s6,-8(t0) ex_int2: s8addq t1,t0,t0 /* t0 = t0 - 8 * register count */ ldl t1,FltSave(pv) /* t1 = saved flt register count */ br t2,ex_flt1 /* t2 = current pc */ ex_flt1: lda t2,48(t2) /* lda t2,ex_flt2-ex_flt1(t2) !!!!!!!!!!!!! */ negl t1,t1 /* negate register count */ s4addq t1,t2,t2 /* t2 = ex_flt_sav - 4 * register count */ jmp zero,(t2) /* jump to save position */ ldt $f2,-64(t0) ldt $f3,-56(t0) ldt $f4,-48(t0) ldt $f5,-40(t0) ldt $f6,-32(t0) ldt $f7,-24(t0) ldt $f8,-16(t0) ldt $f9,-8(t0) ex_flt2: ldl t0,0(ra) /* load instruction LDA PV,xxx(RA) */ sll t0,48,t0 sra t0,48,t0 /* isolate offset */ addq t0,ra,pv /* compute update address */ ldl t0,4(ra) /* load instruction LDAH PV,xxx(PV) */ srl t0,16,t0 /* isolate instruction code */ lda t0,-0x177b(t0) /* test for LDAH */ bne t0,ex_stack_loop ldl t0,4(ra) /* load instruction LDAH PV,xxx(RA) */ sll t0,16,t0 /* compute high offset */ addl t0,0,t0 /* sign extend high offset */ addq t0,pv,pv /* compute update address */ br ex_stack_loop .end asm_handle_nat_exception /********************* asm_check_clinit **************************************** * * * Does null check and calls monitorenter or throws an exception * * * *******************************************************************************/ .ent asm_check_clinit asm_check_clinit: ldgp gp,0(pv) ldl itmp2,offclassinit(itmp1) bne itmp2,L_is_initialized subq sp,7*8,sp stq ra,0*8(sp) stq a0,1*8(sp) /* save argument registers for leaf funcs */ stq a1,2*8(sp) stq a2,3*8(sp) stq a3,4*8(sp) stq a4,5*8(sp) stq a5,6*8(sp) mov itmp1,a0 jsr ra,class_init ldgp gp,0(ra) ldq ra,0*8(sp) ldq a0,1*8(sp) /* restore argument registers */ ldq a1,2*8(sp) ldq a2,3*8(sp) ldq a3,4*8(sp) ldq a4,5*8(sp) ldq a5,6*8(sp) addq sp,7*8,sp L_is_initialized: mov ra,itmp1 /* now patch the calling code */ subq itmp1,(3*4),itmp1 /* go back 3 instructions */ ldah itmp2,-15392(zero) /* br -- 0xc3e0 == -15392 */ lda itmp2,4(itmp2) /* jump over 4 instructions */ stl itmp2,0(itmp1) /* store the new branch: br +4 */ jmp zero,(ra) .end asm_check_clinit /********************* function asm_builtin_monitorenter *********************** * * * Does null check and calls monitorenter or throws an exception * * * *******************************************************************************/ .ent asm_builtin_monitorenter asm_builtin_monitorenter: ldgp gp,0(pv) lda pv,builtin_monitorenter beq a0,nb_monitorenter /* if (null) throw exception */ jmp zero,(pv) /* else call builtin_monitorenter */ nb_monitorenter: subq sp,8,sp stq ra,0(sp) ldq a0,string_java_lang_NullPointerException jsr ra,new_exception_message ldgp gp,0(ra) mov v0,xptr ldq ra,0(sp) addq sp,8,sp lda xpc,-4(ra) /* faulting address is return adress - 4*/ br asm_handle_nat_exception .end asm_builtin_monitorenter /********************* function asm_builtin_monitorexit ************************ * * * Does null check and calls monitorexit or throws an exception * * * *******************************************************************************/ .ent asm_builtin_monitorexit asm_builtin_monitorexit: ldgp gp,0(pv) lda pv,builtin_monitorexit beq a0,nb_monitorexit /* if (null) throw exception */ jmp zero,(pv) /* else call builtin_monitorexit */ nb_monitorexit: subq sp,8,sp stq ra,0(sp) ldq a0,string_java_lang_NullPointerException jsr ra,new_exception_message ldgp gp,0(ra) mov v0,xptr ldq ra,0(sp) addq sp,8,sp lda xpc,-4(ra) /* faulting address is return adress - 4*/ br asm_handle_nat_exception .end asm_builtin_monitorexit /************************ function asm_builtin_idiv **************************** * * * Does null check and calls idiv or throws an exception * * * *******************************************************************************/ .ent asm_builtin_idiv asm_builtin_idiv: ldgp gp,0(pv) lda pv,builtin_idiv beq a1,nb_idiv /* if (null) throw exception */ jmp zero,(pv) /* else call builtin_idiv */ nb_idiv: subq sp,8,sp stq ra,0(sp) ldq a0,string_java_lang_ArithmeticException ldq a1,string_java_lang_ArithmeticException_message jsr ra,new_exception_message ldgp gp,0(ra) mov v0,xptr ldq ra,0(sp) addq sp,8,sp lda xpc,-4(ra) /* faulting address is return adress - 4*/ br asm_handle_nat_exception .end asm_builtin_idiv /************************ function asm_builtin_ldiv **************************** * * * Does null check and calls ldiv or throws an exception * * * *******************************************************************************/ .ent asm_builtin_ldiv asm_builtin_ldiv: ldgp gp,0(pv) lda pv,builtin_ldiv beq a1,nb_ldiv /* if (null) throw exception */ jmp zero,(pv) /* else call builtin_ldiv */ nb_ldiv: subq sp,8,sp stq ra,0(sp) ldq a0,string_java_lang_ArithmeticException ldq a1,string_java_lang_ArithmeticException_message jsr ra,new_exception_message ldgp gp,0(ra) mov v0,xptr ldq ra,0(sp) addq sp,8,sp lda xpc,-4(ra) /* faulting address is return adress - 4*/ br asm_handle_nat_exception .end asm_builtin_ldiv /************************ function asm_builtin_irem **************************** * * * Does null check and calls irem or throws an exception * * * *******************************************************************************/ .ent asm_builtin_irem asm_builtin_irem: ldgp gp,0(pv) lda pv,builtin_irem beq a1,nb_irem /* if (null) throw exception */ jmp zero,(pv) /* else call builtin_irem */ nb_irem: subq sp,8,sp stq ra,0(sp) ldq a0,string_java_lang_ArithmeticException ldq a1,string_java_lang_ArithmeticException_message jsr ra,new_exception_message ldgp gp,0(ra) mov v0,xptr ldq ra,0(sp) addq sp,8,sp lda xpc,-4(ra) /* faulting address is return adress - 4*/ br asm_handle_nat_exception .end asm_builtin_irem /************************ function asm_builtin_lrem **************************** * * * Does null check and calls lrem or throws an exception * * * *******************************************************************************/ .ent asm_builtin_lrem asm_builtin_lrem: ldgp gp,0(pv) lda pv,builtin_lrem beq a1,nb_lrem /* if (null) throw exception */ jmp zero,(pv) /* else call builtin_lrem */ nb_lrem: subq sp,8,sp stq ra,0(sp) ldq a0,string_java_lang_ArithmeticException ldq a1,string_java_lang_ArithmeticException_message jsr ra,new_exception_message ldgp gp,0(ra) mov v0,xptr ldq ra,0(sp) addq sp,8,sp lda xpc,-4(ra) /* faulting address is return adress - 4*/ br asm_handle_nat_exception .end asm_builtin_lrem /*********************** function new_builtin_checkcast ************************ * * * Does the cast check and eventually throws an exception * * * *******************************************************************************/ .ent asm_builtin_checkcast asm_builtin_checkcast: ldgp gp,0(pv) lda sp,-16(sp) # allocate stack space stq ra,0(sp) # save return address stq a0,8(sp) # save object pointer jsr ra,builtin_checkcast # builtin_checkcast ldgp gp,0(ra) beq v0,nb_ccast_throw # if (false) throw exception ldq ra,0(sp) # restore return address ldq v0,8(sp) # return object pointer lda sp,16(sp) # free stack space jmp zero,(ra) nb_ccast_throw: ldq a0,string_java_lang_ClassCastException jsr ra,new_exception ldgp gp,0(ra) mov v0,xptr ldq ra,0(sp) # restore return address lda sp,16(sp) # free stack space lda xpc,-4(ra) # faulting address is return adress - 4 br asm_handle_nat_exception .end asm_builtin_checkcast /******************* function asm_builtin_checkarraycast *********************** * * * Does the cast check and eventually throws an exception * * * *******************************************************************************/ .ent asm_builtin_checkarraycast asm_builtin_checkarraycast: ldgp gp,0(pv) lda sp,-16(sp) /* allocate stack space */ stq ra,0(sp) /* save return address */ stq a0,8(sp) /* save object pointer */ jsr ra,builtin_checkarraycast /* builtin_checkarraycast */ ldgp gp,0(ra) beq v0,nb_carray_throw /* if (false) throw exception */ ldq ra,0(sp) /* restore return address */ ldq v0,8(sp) /* return object pointer */ lda sp,16(sp) /* free stack space */ jmp zero,(ra) nb_carray_throw: ldq a0,string_java_lang_ClassCastException jsr ra,new_exception ldgp gp,0(ra) mov v0,xptr ldq ra,0(sp) /* restore return address */ lda sp,16(sp) /* free stack space */ lda xpc,-4(ra) /* faulting address is return adress - 4*/ br asm_handle_nat_exception .end asm_builtin_checkarraycast /******************* function asm_builtin_aastore ****************************** * * * Does the cast check and eventually throws an exception * * * *******************************************************************************/ .ent asm_builtin_aastore asm_builtin_aastore: ldgp gp,0(pv) beq a0,nb_aastore_null /* if null pointer throw exception */ ldl t0,offarraysize(a0) /* load size */ lda sp,-24(sp) /* allocate stack space */ stq ra,0(sp) /* save return address */ s8addq a1,a0,t1 /* add index*8 to arrayref */ cmpult a1,t0,t0 /* do bound check */ beq t0,nb_aastore_bound /* if out of bounds throw exception */ mov a2,a1 /* object is second argument */ stq t1,8(sp) /* save store position */ stq a1,16(sp) /* save object */ jsr ra,builtin_canstore /* builtin_canstore(arrayref,object) */ ldgp gp,0(ra) ldq ra,0(sp) /* restore return address */ ldq a0,8(sp) /* restore store position */ ldq a1,16(sp) /* restore object */ lda sp,24(sp) /* free stack space */ beq v0,nb_aastore_throw /* if (false) throw exception */ stq a1,offobjarrdata(a0) /* store objectptr in array */ jmp zero,(ra) nb_aastore_null: subq sp,8,sp /* allocate stack space */ stq ra,0(sp) /* save return address */ ldq a0,string_java_lang_NullPointerException jsr ra,new_exception ldgp gp,0(ra) mov v0,xptr ldq ra,0(sp) addq sp,8,sp mov ra,xpc /* faulting address is return adress */ br asm_handle_nat_exception nb_aastore_bound: ldq a0,string_java_lang_ArrayIndexOutOfBoundsException jsr ra,new_exception_int /* a1 already contains the index */ ldgp gp,0(ra) mov v0,xptr ldq ra,0(sp) /* restore return address */ lda sp,24(sp) /* free stack space */ mov ra,xpc /* faulting address is return adress */ br asm_handle_nat_exception nb_aastore_throw: subq sp,8,sp /* allocate stack space */ stq ra,0(sp) /* save return address */ ldq a0,string_java_lang_ArrayStoreException jsr ra,new_exception ldgp gp,0(ra) mov v0,xptr ldq ra,0(sp) addq sp,8,sp mov ra,xpc /* faulting address is return adress */ br asm_handle_nat_exception .end asm_builtin_aastore /******************* function asm_initialize_thread_stack ********************** * * * initialized a thread stack * * * *******************************************************************************/ .ent asm_initialize_thread_stack asm_initialize_thread_stack: lda a1,-128(a1) stq zero, 0(a1) stq zero, 8(a1) stq zero, 16(a1) stq zero, 24(a1) stq zero, 32(a1) stq zero, 40(a1) stq zero, 48(a1) stt fzero, 56(a1) stt fzero, 64(a1) stt fzero, 72(a1) stt fzero, 80(a1) stt fzero, 88(a1) stt fzero, 96(a1) stt fzero, 104(a1) stt fzero, 112(a1) stq a0, 120(a1) mov a1, v0 jmp zero,(ra) .end asm_initialize_thread_stack /******************* function asm_perform_threadswitch ************************* * * * void asm_perform_threadswitch (u1 **from, u1 **to, u1 **stackTop); * * * * performs a threadswitch * * * *******************************************************************************/ .ent asm_perform_threadswitch asm_perform_threadswitch: subq sp,128,sp stq s0, 0(sp) stq s1, 8(sp) stq s2, 16(sp) stq s3, 24(sp) stq s4, 32(sp) stq s5, 40(sp) stq s6, 48(sp) stt sf0, 56(sp) stt sf1, 64(sp) stt sf2, 72(sp) stt sf3, 80(sp) stt sf4, 88(sp) stt sf5, 96(sp) stt sf6, 104(sp) stt sf7, 112(sp) stq ra, 120(sp) stq sp, 0(a0) stq sp, 0(a2) ldq sp, 0(a1) ldq s0, 0(sp) ldq s1, 8(sp) ldq s2, 16(sp) ldq s3, 24(sp) ldq s4, 32(sp) ldq s5, 40(sp) ldq s6, 48(sp) ldt sf0, 56(sp) ldt sf1, 64(sp) ldt sf2, 72(sp) ldt sf3, 80(sp) ldt sf4, 88(sp) ldt sf5, 96(sp) ldt sf6, 104(sp) ldt sf7, 112(sp) ldq ra, 120(sp) mov ra, pv addq sp, 128, sp jmp zero,(ra) .end asm_perform_threadswitch /********************* function asm_switchstackandcall ************************* * * * void *asm_switchstackandcall (void *stack, void *func, void **stacktopsave, * * void *p); * * * * Switches to a new stack, calls a function and switches back. * * a0 new stack pointer * * a1 function pointer * * a2 pointer to variable where stack top should be stored * * a3 pointer to user data, is passed to the function * * * *******************************************************************************/ .ent asm_switchstackandcall asm_switchstackandcall: lda a0,-2*8(a0) /* allocate new stack */ stq ra,0(a0) /* save return address on new stack */ stq sp,1*8(a0) /* save old stack pointer on new stack */ stq sp,0(a2) /* save old stack pointer to variable */ mov a0,sp /* switch to new stack */ mov a1,pv /* load function pointer */ mov a3,a0 /* pass pointer */ jmp ra,(pv) /* and call function */ ldq ra,0(sp) /* load return address */ ldq sp,1*8(sp) /* switch to old stack */ jmp zero,(ra) /* return */ .end asm_switchstackandcall /********************* function asm_getcallingmethod *************************** * * * classinfo *asm_getcallingmethodclass (); * * * * goes back stack frames to get the calling method * * * * t2 .. sp * * t3 .. ra * * t4 .. pv * * * *******************************************************************************/ .ent asm_getcallingmethod asm_getcallingmethod: ldq t3,16(sp) /* load return address of native function */ addq sp,24,t2 /* skip frames of C-Function and nativestub */ /* determine pv (t3) of java-function from ra */ ldl t0,0(t3) /* load instruction LDA PV,xxx(RA) */ sll t0,48,t0 sra t0,48,t0 /* isolate offset */ addq t0,t3,t4 /* compute update address */ ldl t0,4(t3) /* load instruction LDAH PV,xxx(PV) */ srl t0,16,t0 /* isolate instruction code */ lda t0,-0x177b(t0) /* test for LDAH */ bne t0,pv_ok1 ldl t0,0(t3) /* load instruction LDA PV,xxx(RA) */ sll t0,16,t0 /* compute high offset */ addl t0,0,t0 /* sign extend high offset */ addq t0,t4,t4 /* compute update address */ pv_ok1: ldl t0,FrameSize(t4) /* t0 = frame size */ addq t2,t0,t2 /* skip frame of java function */ ldq t3,-8(t2) /* load new ra */ /* determine pv (t3) of java-function from ra */ ldl t0,0(t3) /* load instruction LDA PV,xxx(RA) */ sll t0,48,t0 sra t0,48,t0 /* isolate offset */ addq t0,t3,t4 /* compute update address */ ldl t0,4(t3) /* load instruction LDAH PV,xxx(PV) */ srl t0,16,t0 /* isolate instruction code */ lda t0,-0x177b(t0) /* test for LDAH */ bne t0,pv_ok2 ldl t0,0(t3) /* load instruction LDA PV,xxx(RA) */ sll t0,16,t0 /* compute high offset */ addl t0,0,t0 /* sign extend high offset */ addq t0,t4,t4 /* compute update address */ pv_ok2: ldq v0,MethodPointer(t4) /* */ jmp zero,(ra) /* return */ .end asm_getcallingmethod /* * These are local overrides for various environment variables in Emacs. * Please do not remove this and leave it at the end of the file, where * Emacs will automagically detect them. * --------------------------------------------------------------------- * Local variables: * mode: asm * indent-tabs-mode: t * c-basic-offset: 4 * tab-width: 4 * End: */