/* src/vm/jit/alpha/asmpart.S - Java-C interface functions for alpha
- Copyright (C) 1996-2005 R. Grafl, A. Krall, C. Kruegel, C. Oates,
- R. Obermaisser, M. Platter, M. Probst, S. Ring, E. Steiner,
- C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich, J. Wenninger,
- Institut f. Computersprachen - TU Wien
+ Copyright (C) 1996-2005, 2006, 2007 R. Grafl, A. Krall, C. Kruegel,
+ C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
+ E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
+ J. Wenninger, Institut f. Computersprachen - TU Wien
This file is part of CACAO.
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
-
- Changes: Joseph Wenninger
- Christian Thalinger
-
- $Id: asmpart.S 3285 2005-09-27 14:12:36Z twisti $
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA.
*/
#include "config.h"
-#include "vm/jit/methodheader.h"
-#include "vm/jit/alpha/offsets.h"
+#include "vm/jit/alpha/md-abi.h"
#include "vm/jit/alpha/md-asm.h"
+#include "vm/jit/abi-asm.h"
+#include "vm/jit/methodheader.h"
+
.text
.set noat
.set noreorder
-/********************* exported functions and variables ***********************/
-
- .globl asm_sync_instruction_cache
- .globl has_no_x_instr_set
-
- .globl asm_calljavafunction
- .globl asm_calljavafunction_int
+/* export functions ***********************************************************/
- .globl asm_calljavafunction2
- .globl asm_calljavafunction2int
- .globl asm_calljavafunction2long
- .globl asm_calljavafunction2float
- .globl asm_calljavafunction2double
+ .globl asm_vm_call_method
+ .globl asm_vm_call_method_int
+ .globl asm_vm_call_method_long
+ .globl asm_vm_call_method_float
+ .globl asm_vm_call_method_double
+ .globl asm_vm_call_method_exception_handler
+ .globl asm_vm_call_method_end
.globl asm_call_jit_compiler
+
.globl asm_handle_exception
.globl asm_handle_nat_exception
- .globl asm_wrapper_patcher
-
- .globl asm_perform_threadswitch
- .globl asm_initialize_thread_stack
- .globl asm_switchstackandcall
- .globl asm_criticalsections
- .globl asm_getclassvalues_atomic
-
-
-/* asm_sync_instruction_cache **************************************************
+ .globl asm_abstractmethoderror
- XXX
+ .globl asm_compare_and_swap
+ .globl asm_memory_barrier
-*******************************************************************************/
+ .globl asm_md_init
+ .globl asm_cacheflush
- .ent asm_sync_instruction_cache
-asm_sync_instruction_cache:
- call_pal PAL_imb /* synchronize instruction cache */
- jmp zero,(ra)
-
- .end asm_sync_instruction_cache
-
-/*********************** 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 asm_calljavafunction ***************************
+/* asm_vm_call_method **********************************************************
* *
* This function calls a Java-method (which possibly needs compilation) *
* with up to 4 address parameters. *
* *
*******************************************************************************/
- .ent asm_calljavafunction
-
-call_name:
- .ascii "calljavafunction\0\0"
-
- .align 2 /*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 */
- .long 0 /* ALIGNMENT PADDING */
- .quad 0 /* line number table start */
- .quad 0 /* line number table size */
- .long 0 /* ALIGNMENT PADDING */
- .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:
-asm_calljavafunction_int:
- 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 */
+ .ent asm_vm_call_method
- stq a0,16(sp) /* save method pointer for compiler */
- lda v0,16(sp) /* pass pointer to method pointer via v0*/
+ .align 3
- mov a1,a0 /* pass the remaining parameters */
- mov a2,a1
- mov a3,a2
- mov a4,a3
+ .quad 0 /* catch type all */
+ .quad 0 /* handler pc */
+ .quad 0 /* end pc */
+ .quad 0 /* start pc */
+ .long 1 /* extable size */
+ .long 0 /* ALIGNMENT PADDING */
+ .quad 0 /* line number table start */
+ .quad 0 /* line number table size */
+ .long 0 /* ALIGNMENT PADDING */
+ .long 0 /* fltsave */
+ .long 1 /* intsave */
+ .long 0 /* isleaf */
+ .long 0 /* IsSync */
+ .long 0 /* frame size */
+ .quad 0 /* codeinfo pointer */
+
+asm_vm_call_method:
+asm_vm_call_method_int:
+asm_vm_call_method_long:
+asm_vm_call_method_float:
+asm_vm_call_method_double:
+ ldgp gp,0(pv)
+ lda sp,-5*8(sp) /* allocate stack space */
+ stq ra,0*8(sp) /* save return address */
+ stq gp,1*8(sp) /* save global pointer */
+
+ stq s0,3*8(sp)
+ stq a0,4*8(sp) /* save method PV */
+
+ mov a1,t0 /* address of argument array */
+ mov a2,t1 /* stack argument count */
+ mov sp,s0 /* save stack pointer */
+
+ ldq a0,0*8(t0)
+ ldq a1,1*8(t0)
+ ldq a2,2*8(t0)
+ ldq a3,3*8(t0)
+ ldq a4,4*8(t0)
+ ldq a5,5*8(t0)
+
+ ldt fa0,6*8(t0)
+ ldt fa1,7*8(t0)
+ ldt fa2,8*8(t0)
+ ldt fa3,9*8(t0)
+ ldt fa4,10*8(t0)
+ ldt fa5,11*8(t0)
+
+ beq t1,L_asm_vm_call_method_stack_copy_done
+
+ negq t1,t2 /* calculate stackframe size (* 8) */
+ s8addq t2,sp,sp /* create stackframe */
+ mov sp,t2 /* temporary stack pointer */
+
+L_asm_vm_call_method_stack_copy_loop:
+ ldq t3,12*8(t0) /* load argument */
+ stq t3,0(t2) /* store argument on stack */
+
+ subq t1,1,t1 /* subtract 1 argument */
+ addq t0,8,t0 /* load address of next argument */
+ addq t2,8,t2 /* increase stack pointer */
+
+ bgt t1,L_asm_vm_call_method_stack_copy_loop
+
+L_asm_vm_call_method_stack_copy_done:
+ lda mptr,4*8(s0) /* get address of PV */
+ ldq pv,0*8(mptr) /* load PV */
+ jmp ra,(pv)
+L_asm_vm_call_method_recompute_pv:
+ lda pv,(asm_vm_call_method - L_asm_vm_call_method_recompute_pv)(ra)
+
+ mov s0,sp /* restore stack pointer */
+
+L_asm_vm_call_method_recompute_return:
+ ldq ra,0*8(sp) /* restore RA */
+ ldq gp,1*8(sp) /* restore global pointer */
+ ldq s0,3*8(sp)
+
+ lda sp,5*8(sp) /* free stack space */
+ jmp zero,(ra)
- lda itmp2,asm_call_jit_compiler/* fake virtual function call (2 instr)*/
- stq itmp2,8(sp) /* store function address */
- mov sp,itmp2 /* set method pointer */
+asm_vm_call_method_exception_handler:
+ mov s0,sp /* restore stack pointer */
+ ldq gp,1*8(sp) /* restore global pointer */
+ mov itmp1,a0
+ jsr ra,builtin_throw_exception
- ldq pv,8(itmp2) /* method call as in Java */
- jmp ra,(pv) /* call JIT compiler */
-calljava_jit:
- lda pv,(asm_calljavafunction - calljava_jit)(ra)
+asm_vm_call_method_end:
+ br L_asm_vm_call_method_recompute_return
-calljava_return:
- ldq ra,0(sp) /* restore return address */
- ldq gp,24(sp) /* restore global pointer */
- lda sp,32(sp) /* free stack space */
+ .end asm_vm_call_method
-calljava_ret:
- jmp zero,(ra)
-calljava_xhandler:
- ldq gp,24(sp) /* restore global pointer */
- mov xptr,a0
- jsr ra,builtin_throw_exception
- ldq ra,0(sp) /* restore return address */
- lda sp,32(sp) /* free stack space */
- mov zero,v0 /* return NULL */
- jmp zero,(ra)
- .end asm_calljavafunction
+/* asm_call_jit_compiler *******************************************************
+ Invokes the compiler for untranslated Java methods.
+*******************************************************************************/
+ .ent asm_call_jit_compiler
- .ent asm_calljavafunction2
+asm_call_jit_compiler:
+ ldgp gp,0(pv)
+ lda sp,-(ARG_CNT+2)*8(sp) /* +2: keep stack 16-byte aligned */
-call_name2:
- .align 3
+ stq ra,0*8(sp) /* save return address */
- .quad 0 /* catch type all */
- .quad calljava_xhandler2 /* handler pc */
- .quad calljava_xhandler2 /* end pc */
- .quad asm_calljavafunction2 /* start pc */
- .long 1 /* extable size */
- .long 0 /* ALIGNMENT PADDING */
- .quad 0 /* line number table start */
- .quad 0 /* line number table size */
- .long 0 /* ALIGNMENT PADDING */
- .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_calljavafunction2int:
-asm_calljavafunction2long:
-asm_calljavafunction2float:
-asm_calljavafunction2double:
- ldgp gp,0(pv)
- lda sp,-5*8(sp) /* allocate stack space */
- stq ra,0*8(sp) /* save return address */
- stq gp,1*8(sp) /* save global pointer */
- stq s6,3*8(sp)
-
- stq a0,4*8(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 v0,4*8(t4) /* pass pointer to method pointer via v0*/
-
- lda itmp2,asm_call_jit_compiler/* fake virtual function call (2 instr)*/
- stq itmp2,16(t4) /* store function address */
- lda itmp2,8(t4) /* set method pointer */
-
- ldq pv,8(itmp2) /* method call as in Java */
- jmp ra,(pv) /* call JIT compiler */
-calljava_jit2:
- lda pv,(asm_calljavafunction2 - calljava_jit2)(ra)
-
- s8addq s6,sp,sp
-calljava_return2:
- ldq ra,0*8(sp) /* restore return address */
- ldq gp,1*8(sp) /* restore global pointer */
- ldq s6,3*8(sp)
- lda sp,5*8(sp) /* free stack space */
-
-calljava_ret2:
- jmp zero,(ra)
+ SAVE_ARGUMENT_REGISTERS(1) /* save 6 int/6 float argument registers */
-calljava_xhandler2:
- s8addq s6,sp,sp
- ldq gp,1*8(sp) /* restore global pointer */
- mov itmp1,a0
- jsr ra,builtin_throw_exception
- ldq ra,0*8(sp) /* restore return address */
- ldq s6,3*8(sp)
- lda sp,5*8(sp) /* free stack space */
- mov zero,v0 /* return NULL */
- jmp zero,(ra)
+ mov itmp1,a0 /* pass methodinfo pointer */
+ mov mptr,a1 /* pass method pointer */
+ lda a2,(ARG_CNT+2)*8(sp) /* pass java sp */
+ mov ra,a3
+ jsr ra,jit_asm_compile /* call jit compiler */
+ mov v0,pv
- .end asm_calljavafunction2
+ ldq ra,0*8(sp) /* load return address */
+ RESTORE_ARGUMENT_REGISTERS(1) /* restore 6 int/6 float argument registers */
-/****************** 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 ($28) *
-* in the static case the method pointer can be computed using the *
-* return address and the lda function following the jmp instruction *
-* *
-*******************************************************************************/
+ lda sp,(ARG_CNT+2)*8(sp) /* remove stack frame */
- .ent asm_call_jit_compiler
+ beq pv,L_asm_call_jit_compiler_exception
-asm_call_jit_compiler:
- ldgp gp,0(pv)
- ldl t8,-8(ra) /* load instruction LDQ PV,xxx($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,-(15*8+sizestackframeinfo)(sp) /* reserve stack space */
-
- SAVE_ARGUMENT_REGISTERS(0) /* save 6 int/6 float argument registers */
-
- stq $28,12*8(sp) /* save method pointer */
- stq ra,13*8(sp) /* save return address */
- stq v0,14*8(sp) /* save methodinfo pointer */
-
- lda a0,15*8(sp) /* create stackframe info */
- mov zero,a1 /* we don't have pv handy */
- lda a2,15*8+sizestackframeinfo(sp) /* pass java sp */
- mov ra,a3 /* pass Java ra */
- mov a3,a4 /* xpc is equal to ra */
- jsr ra,stacktrace_create_extern_stackframeinfo
- ldgp gp,0(ra)
-
- ldq v0,14*8(sp) /* restore methodinfo pointer */
- ldq a0,0(v0) /* pass methodinfo pointer */
- jsr ra,jit_compile /* call jit compiler */
- ldgp gp,0(ra)
- stq v0,14*8(sp) /* save return value */
-
- lda a0,15*8(sp) /* remove stackframe info */
- jsr ra,stacktrace_remove_stackframeinfo
- ldgp gp,0(ra)
-
- RESTORE_ARGUMENT_REGISTERS(0) /* restore 6 int/6 float argument registers */
-
- ldq $28,12*8(sp) /* load method pointer */
- ldq ra,13*8(sp) /* load return address */
- ldq v0,14*8(sp) /* restore return value */
- lda sp,15*8+sizestackframeinfo(sp) /* deallocate stack area */
-
- beq v0,L_asm_call_jit_compiler_exception
-
- ldl t8,-8(ra) /* load instruction LDQ PV,xxx($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 */
-
- call_pal PAL_imb /* synchronise instruction cache */
-
- mov v0,pv /* load method address into pv */
- jmp zero,(pv) /* and call method. The method returns */
+ jmp zero,(pv) /* and call method, the method returns */
/* directly to the caller (ra). */
L_asm_call_jit_compiler_exception:
-#if defined(USE_THREADS) && defined(NATIVE_THREADS)
- subq sp,1*8,sp
+ subq sp,2*8,sp
stq ra,0*8(sp) /* save return address (xpc) */
- jsr ra,builtin_asm_get_exceptionptrptr
- ldq ra,0*8(sp) /* restore return address (xpc) */
- addq sp,1*8,sp
-#else
- lda v0,_exceptionptr
-#endif
- ldq xptr,0(v0) /* get the exception pointer */
- stq zero,0(v0) /* clear the exception pointer */
+ jsr ra,exceptions_get_and_clear_exception
+ ldq ra,0*8(sp) /* restore return address (xpc) */
+ addq sp,2*8,sp
- subq ra,4,xpc
- br asm_handle_nat_exception
+ mov v0,xptr /* get exception */
+ subq ra,4,xpc /* exception address is ra - 4 */
+ br L_asm_handle_nat_exception
.end asm_call_jit_compiler
-/********************* 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); *
-* *
+/* 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.
+
+ ATTENTION: itmp3 == gp!
+
*******************************************************************************/
.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 */
+L_asm_handle_nat_exception: /* required for PIC code */
+L_asm_handle_exception_stack_loop:
+ lda sp,-6*8(sp) /* keep stack 16-byte aligned */
+ stq xptr,0*8(sp) /* save xptr */
+ stq xpc,1*8(sp) /* save xpc */
+ stq ra,3*8(sp) /* save RA */
+ stq zero,4*8(sp) /* save maybe-leaf flag (cleared) */
+
+ mov ra,a0 /* pass RA */
+
+ br ra,L_asm_handle_exception_load_gp
+L_asm_handle_exception_load_gp:
+ ldgp gp,0(ra) /* load gp */
+
+ jsr ra,md_codegen_get_pv_from_pc/* get PV from RA */
+ stq v0,2*8(sp) /* save PV */
+
+ ldq a0,0*8(sp) /* pass xptr */
+ ldq a1,1*8(sp) /* pass xpc */
+ mov v0,a2 /* pass PV */
+ addq sp,6*8,a3 /* pass Java SP */
+
+ br L_asm_handle_exception_continue
.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 a3,0(zero)
- lda a4,1(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 */
-
- ldl itmp3,offclassloaded(a1)
- bne itmp3,L_class_loaded
-
- subq sp,8*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)
- stq a1,7*8(sp)
-
- mov a1,a0
-
- br ra,L_class_load_ra /* set ra for gp loading */
-L_class_load_ra:
- ldgp gp,0(ra) /* load gp */
- jsr ra,load_class_bootstrap
-
- 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)
- ldq a1,7*8(sp)
- addq sp,8*8,sp /* deallocate stack */
-
-L_class_loaded:
- ldl itmp3,offclasslinked(a1)
- subq sp,8*8,sp /* allocate stack */
- stq a1,7*8(sp)
- bne itmp3,L_class_linked
-
- 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)
-
- mov a1,a0
-
- br ra,L_class_link_ra /* set ra for gp loading */
-L_class_link_ra:
- ldgp gp,0(ra) /* load gp */
- jsr ra,link_class
-
- 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)
-
-L_class_linked:
-_crit_restart1:
- ldq a1,7*8(sp)
-_crit_begin1:
- 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) */
-_crit_end1:
- subl a0,v0,a0 /* a0 = baseval(xptr) - baseval(catchtype) */
- cmpule a0,a1,v0 /* v0 = xptr is instanceof catchtype */
- addq sp,8*8,sp /* deallocate stack */
- 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 */
-
-#if defined(USE_THREADS)
- 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) */
+L_asm_handle_exception: /* required for PIC code */
+ lda sp,-(ARG_CNT+TMP_CNT)*8(sp) /* create maybe-leaf stackframe */
+
+ SAVE_ARGUMENT_REGISTERS(0) /* we save arg and temp registers in */
+ SAVE_TEMPORARY_REGISTERS(ARG_CNT) /* case this is a leaf method */
+
+ lda sp,-6*8(sp) /* keep stack 16-byte aligned */
+ stq xptr,0*8(sp) /* save xptr */
+ stq pv,2*8(sp) /* save PV */
+ stq ra,3*8(sp) /* save RA */
+ lda t0,1(zero) /* set maybe-leaf flag */
+ stq t0,4*8(sp) /* save maybe-leaf flag */
+
+ br ra,L_asm_handle_exception_load_gp_2
+L_asm_handle_exception_load_gp_2:
+ ldgp gp,0(ra) /* load gp */
+
+ mov xptr,a0 /* pass xptr */
+ mov xpc,a1 /* pass xpc */
+ mov pv,a2 /* pass PV */
+ lda a3,(ARG_CNT+TMP_CNT+6)*8(sp)/* pass Java SP */
+
+L_asm_handle_exception_continue:
+ jsr ra,exceptions_handle_exception
+
+ beq v0,L_asm_handle_exception_not_catched
+
+ mov v0,xpc /* move handlerpc into xpc */
+ ldq xptr,0*8(sp) /* restore xptr */
+ ldq pv,2*8(sp) /* restore PV */
+ ldq ra,3*8(sp) /* restore RA */
+ ldq t0,4*8(sp) /* get maybe-leaf flag */
+ lda sp,6*8(sp) /* free stack frame */
+
+ beq t0,L_asm_handle_exception_no_leaf
+
+ RESTORE_ARGUMENT_REGISTERS(0) /* if this is a leaf method, we have */
+ RESTORE_TEMPORARY_REGISTERS(ARG_CNT)/* to restore arg and temp registers */
- 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 */
-#endif
+ lda sp,(ARG_CNT+TMP_CNT)*8(sp) /* remove maybe-leaf stackframe */
+
+L_asm_handle_exception_no_leaf:
+ jmp zero,(xpc) /* jump to the handler */
+
+L_asm_handle_exception_not_catched:
+ ldq xptr,0*8(sp) /* restore xptr */
+ ldq pv,2*8(sp) /* restore PV */
+ ldq ra,3*8(sp) /* restore RA */
+ ldq t0,4*8(sp) /* get maybe-leaf flag */
+ lda sp,6*8(sp)
+
+ beq t0,L_asm_handle_exception_no_leaf_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 */
+ lda sp,(ARG_CNT+TMP_CNT)*8(sp) /* remove maybe-leaf stackframe */
+ mov zero,t0 /* clear the maybe-leaf flag */
+
+L_asm_handle_exception_no_leaf_stack:
+ ldl t1,FrameSize(pv) /* get frame size */
+ addq t1,sp,t1 /* pointer to save area */
+
+ ldl t2,IsLeaf(pv) /* is leaf procedure */
+ bne t2,L_asm_handle_exception_no_ra_restore
+
+ ldq ra,-1*8(t1) /* restore ra */
+ subq t1,8,t1 /* t1-- */
+
+L_asm_handle_exception_no_ra_restore:
+ mov ra,xpc /* the new xpc is ra */
+ ldl t2,IntSave(pv) /* t2 = saved int register count */
+ br t3,ex_int1 /* t3 = 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)
+ lda t3,(ex_int2 - ex_int1)(t3)
+ negl t2,t2 /* negate register count */
+ s4addq t2,t3,t3 /* t2 = IntSave - register count * 4 */
+ jmp zero,(t3) /* jump to save position */
+
+ ldq s0,-7*8(t1)
+ ldq s1,-6*8(t1)
+ ldq s2,-5*8(t1)
+ ldq s3,-4*8(t1)
+ ldq s4,-3*8(t1)
+ ldq s5,-2*8(t1)
+ ldq s6,-1*8(t1)
+
ex_int2:
- s8addq t1,t0,t0 /* t0 = t0 - 8 * register count */
+ s8addq t2,t1,t1 /* t1 = t1 - 8 * register count */
- ldl t1,FltSave(pv) /* t1 = saved flt register count */
- br t2,ex_flt1 /* t2 = current pc */
+ ldl t2,FltSave(pv) /* t2 = saved flt register count */
+ br t3,ex_flt1 /* t3 = 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 fs0,-64(t0)
- ldt fs1,-56(t0)
- ldt fs2,-48(t0)
- ldt fs3,-40(t0)
- ldt fs4,-32(t0)
- ldt fs5,-24(t0)
- ldt fs6,-16(t0)
- ldt fs7,-8(t0)
+ lda t3,(ex_flt2 - ex_flt1)(t3)
+ negl t2,t2 /* negate register count */
+ s4addq t2,t3,t3 /* t2 = FltSave - 4 * register count */
+ jmp zero,(t3) /* jump to save position */
+
+ ldt fs0,-8*8(t1)
+ ldt fs1,-7*8(t1)
+ ldt fs2,-6*8(t1)
+ ldt fs3,-5*8(t1)
+ ldt fs4,-4*8(t1)
+ ldt fs5,-3*8(t1)
+ ldt fs6,-2*8(t1)
+ ldt fs7,-1*8(t1)
+
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
+ ldl t1,FrameSize(pv) /* get frame size */
+ addq sp,t1,sp /* unwind stack */
+ br L_asm_handle_exception_stack_loop
.end asm_handle_nat_exception
-/* asm_wrapper_patcher *********************************************************
+/* asm_abstractmethoderror *****************************************************
- XXX
+ Creates and throws an AbstractMethodError.
+
+*******************************************************************************/
+
+ .ent asm_abstractmethoderror
+
+asm_abstractmethoderror:
+ subq sp,2*8,sp /* create stackframe */
+ stq ra,0*8(sp) /* save return address */
+ addq sp,2*8,a0 /* pass java sp */
+ mov ra,a1 /* pass exception address */
+ jsr ra,exceptions_asm_new_abstractmethoderror
+ ldq ra,0*8(sp) /* restore return address */
+ addq sp,2*8,sp /* remove stackframe */
+
+ mov v0,xptr /* get exception pointer */
+ subq ra,4,xpc /* exception address is ra - 4 */
+ br L_asm_handle_nat_exception
+
+ .end asm_abstractmethoderror
+
+
+/* asm_compare_and_swap ********************************************************
+
+ Does an atomic compare and swap. Required for the lock
+ implementation.
- Stack layout:
- 40 return address into JIT code (patch position)
- 32 pointer to virtual java_objectheader
- 24 machine code (which is patched back later)
- 16 unresolved class/method/field reference
- 8 data segment displacement from load instructions
- 0 patcher function pointer to call (pv afterwards)
+ Atomically do the following: Check if the location still contains
+ `oldval`. If so, replace it by `newval` and return `oldval`.
- ATTENTION: itmp3 == gp! But we don't need gp do call the patcher function.
+ RETURN VALUE:
+ the old value at *p
+
+ long compare_and_swap(volatile long *p, long oldval, long newval);
*******************************************************************************/
-
- .ent asm_wrapper_patcher
-
-asm_wrapper_patcher:
- lda sp,-((12+27+4)*8+sizestackframeinfo)(sp) /* create stack frame */
-
- SAVE_ARGUMENT_REGISTERS(0) /* save 6 int/6 float argument registers */
- SAVE_TEMPORARY_REGISTERS(12) /* save 11 int/16 float temporary registers */
-
- stq itmp1,(12+27+0)*8(sp) /* save itmp1 */
- stq itmp2,(12+27+1)*8(sp) /* save itmp2 */
- stq ra,(12+27+2)*8(sp) /* save method return address (for leafs) */
- stq pv,(12+27+3)*8(sp) /* save pv of calling java function */
-
- br ra,L_asm_wrapper_patcher_load_gp
-L_asm_wrapper_patcher_load_gp:
- ldgp gp,0(ra) /* load gp (it's not set correctly in jit) */
-
- lda a0,(12+27+4)*8(sp) /* create stackframe info */
- mov pv,a1 /* pass java pv */
- lda a2,((6+12+27+4)*8+sizestackframeinfo)(sp) /* pass java sp */
- ldq a3,(12+27+2)*8(sp) /* this is correct for leafs */
- ldq a4,((5+12+27+4)*8+sizestackframeinfo)(sp) /* pass xpc */
- jsr ra,stacktrace_create_extern_stackframeinfo
- ldgp gp,0(ra)
-
- lda a0,((0+12+27+4)*8+sizestackframeinfo)(sp) /* pass sp */
- ldq pv,((0+12+27+4)*8+sizestackframeinfo)(sp) /* get function pointer */
- ldq itmp1,(12+27+3)*8(sp) /* save pv to the position of fp */
- stq itmp1,((0+12+27+4)*8+sizestackframeinfo)(sp)
- jmp ra,(pv) /* call the patcher function */
- ldgp gp,0(ra)
-
- lda a0,(12+27+4)*8(sp) /* remove stackframe info */
- jsr ra,stacktrace_remove_stackframeinfo
- ldgp gp,0(ra)
-
- RESTORE_ARGUMENT_REGISTERS(0) /* restore 6 int/6 float argument registers */
- RESTORE_TEMPORARY_REGISTERS(12)/* restore 11 integer temporary registers */
-
- ldq itmp1,(12+27+0)*8(sp) /* restore itmp1 */
- ldq itmp2,(12+27+1)*8(sp) /* restore itmp2 */
- ldq ra,(12+27+2)*8(sp) /* restore method return address (for leafs)*/
- ldq pv,(12+27+3)*8(sp) /* restore pv of calling java function */
-
- ldq itmp3,((5+12+27+4)*8+sizestackframeinfo)(sp)/* get RA to jit code */
- lda sp,((6+12+27+4)*8+sizestackframeinfo)(sp) /* remove stack frame */
-
- beq v0,L_asm_wrapper_patcher_exception
-
- jmp zero,(itmp3) /* jump to new patched code */
-
-L_asm_wrapper_patcher_exception:
- mov itmp3,xpc /* return address into JIT code is xpc */
-
- br itmp1,L_asm_wrapper_patcher_exception_load_gp
-L_asm_wrapper_patcher_exception_load_gp:
- ldgp gp,0(itmp1) /* itmp3 == gp, load the current gp */
-
-#if defined(USE_THREADS) && defined(NATIVE_THREADS)
- subq sp,3*8,sp
- stq xpc,0*8(sp) /* save return address (xpc) */
- stq ra,1*8(sp)
- stq pv,2*8(sp)
- jsr ra,builtin_asm_get_exceptionptrptr
- ldq xpc,0*8(sp) /* restore return address (xpc) */
- ldq ra,1*8(sp)
- ldq pv,2*8(sp)
- addq sp,3*8,sp
-#else
- lda v0,_exceptionptr
-#endif
- ldq xptr,0(v0) /* get the exception pointer */
- stq zero,0(v0) /* clear the exception pointer */
- br asm_handle_exception /* we have the pv of the calling java func. */
- .end asm_wrapper_patcher
+ .ent asm_compare_and_swap
+
+asm_compare_and_swap:
+1:
+ ldq_l v0,0(a0)
+ cmpeq v0,a1,t0
+ beq t0,2f
+ mov a2,t0
+ stq_c t0,0(a0)
+ beq t0,1b
+2:
+ jmp zero,(ra)
+
+ .end asm_compare_and_swap
+
+
+/* asm_memory_barrier **********************************************************
+
+ A memory barrier for the Java Memory Model.
-
-/******************* 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
+ .ent asm_memory_barrier
+
+asm_memory_barrier:
+ mb
jmp zero,(ra)
- .end asm_initialize_thread_stack
+ .end asm_memory_barrier
-/******************* function asm_perform_threadswitch *************************
-* *
-* void asm_perform_threadswitch (u1 **from, u1 **to, u1 **stackTop); *
-* *
-* performs a threadswitch *
-* *
+/* asm_md_init *****************************************************************
+
+ Initialize machine dependent stuff.
+
+ Determines if the byte support instruction set (21164a and higher)
+ is available.
+
*******************************************************************************/
- .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 fs0, 56(sp)
- stt fs1, 64(sp)
- stt fs2, 72(sp)
- stt fs3, 80(sp)
- stt fs4, 88(sp)
- stt fs5, 96(sp)
- stt fs6, 104(sp)
- stt fs7, 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 fs0, 56(sp)
- ldt fs1, 64(sp)
- ldt fs2, 72(sp)
- ldt fs3, 80(sp)
- ldt fs4, 88(sp)
- ldt fs5, 96(sp)
- ldt fs6, 104(sp)
- ldt fs7, 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_md_init
+
+asm_md_init:
+ .long 0x47e03c20 /* amask 1,v0 */
+ jmp zero,(ra) /* return */
+
+ .end asm_md_init
+
+
+/* asm_cacheflush **************************************************************
+
+ XXX
+
*******************************************************************************/
+ .ent asm_cacheflush
+
+asm_cacheflush:
+ call_pal PAL_imb /* synchronize instruction cache */
+ jmp zero,(ra)
+
+ .end asm_cacheflush
- .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
-
- .ent asm_getclassvalues_atomic
-
-asm_getclassvalues_atomic:
-_crit_restart2:
-_crit_begin2:
- ldl t0,offbaseval(a0)
- ldl t1,offdiffval(a0)
- ldl t2,offbaseval(a1)
-_crit_end2:
- stl t0,offcast_super_baseval(a2)
- stl t1,offcast_super_diffval(a2)
- stl t2,offcast_sub_baseval(a2)
- jmp zero,(ra)
-
- .end asm_getclassvalues_atomic
-
- .data
-
-asm_criticalsections:
-#if defined(USE_THREADS) && defined(NATIVE_THREADS)
- .quad _crit_begin1
- .quad _crit_end1
- .quad _crit_restart1
- .quad _crit_begin2
- .quad _crit_end2
- .quad _crit_restart2
+/* disable exec-stacks ********************************************************/
+
+#if defined(__linux__) && defined(__ELF__)
+ .section .note.GNU-stack,"",%progbits
#endif
- .quad 0
/*
* c-basic-offset: 4
* tab-width: 4
* End:
+ * vim:noexpandtab:sw=4:ts=4:
*/
projects / cacao.git / blobdiff