-/* src/vm/jit/mips/asmpart.S - Java-C interface functions for mips
+/* src/vm/jit/mips/asmpart.S - Java-C interface functions for MIPS
Copyright (C) 1996-2005 R. Grafl, A. Krall, C. Kruegel, C. Oates,
R. Obermaisser, M. Platter, M. Probst, S. Ring, E. Steiner,
Changes: Christian Thalinger
- $Id: asmpart.S 3707 2005-11-18 00:11:55Z twisti $
+ $Id: asmpart.S 3930 2005-12-09 14:39:10Z twisti $
*/
#include "config.h"
-#include "vm/jit/mips/offsets.h"
+#include "vm/jit/mips/md-abi.h"
#include "vm/jit/mips/md-asm.h"
+#include "vm/jit/mips/offsets.h"
+#include "vm/jit/abi.h"
#include "vm/jit/methodheader.h"
.align 3
- .dword 0 /* catch type all */
- .dword calljava_xhandler /* handler pc */
- .dword calljava_xhandler /* end pc */
- .dword asm_calljavafunction /* start pc */
- .word 1 /* extable size */
- .word 0 /* 4-byte ALIGNMENT PADDING */
- .dword 0 /* line number table start */
- .dword 0 /* line number table size */
- .word 0 /* 4-byte ALIGNMENT PADDING */
- .word 0 /* fltsave */
- .word 0 /* intsave */
- .word 0 /* isleaf */
- .word 0 /* IsSync */
- .word 10*8 /* frame size */
- .dword 0 /* method pointer (pointer to name) */
+ .dword 0 /* catch type all */
+ .dword calljava_xhandler /* handler pc */
+ .dword calljava_xhandler /* end pc */
+ .dword asm_calljavafunction /* start pc */
+ .word 1 /* extable size */
+ .word 0 /* 4-byte ALIGNMENT PADDING */
+ .dword 0 /* line number table start */
+ .dword 0 /* line number table size */
+ .word 0 /* 4-byte ALIGNMENT PADDING */
+ .word 0 /* fltsave */
+ .word 0 /* intsave */
+ .word 0 /* isleaf */
+ .word 0 /* IsSync */
+ .word 0 /* frame size */
+ .dword 0 /* method pointer (pointer to name) */
asm_calljavafunction:
asm_calljavafunction_int:
.align 3
- .dword 0 /* catch type all */
- .dword calljava_xhandler2 /* handler pc */
- .dword calljava_xhandler2 /* end pc */
- .dword asm_calljavafunction2 /* start pc */
- .word 1 /* extable size */
- .word 0 /* 4-byte ALIGNMENT PADDING */
- .dword 0 /* line number table start */
- .dword 0 /* line number table size */
- .word 0 /* 4-byte ALIGNMENT PADDING */
- .word 0 /* fltsave */
- .word 1 /* intsave */
- .word 0 /* isleaf */
- .word 0 /* IsSync */
- .word 12*8 /* frame size */
- .dword 0 /* method pointer (pointer to name) */
+ .dword 0 /* catch type all */
+ .dword calljava_xhandler2 /* handler pc */
+ .dword calljava_xhandler2 /* end pc */
+ .dword asm_calljavafunction2 /* start pc */
+ .word 1 /* extable size */
+ .word 0 /* 4-byte ALIGNMENT PADDING */
+ .dword 0 /* line number table start */
+ .dword 0 /* line number table size */
+ .word 0 /* 4-byte ALIGNMENT PADDING */
+ .word 0 /* fltsave */
+ .word 0 /* intsave */
+ .word 0 /* isleaf */
+ .word 0 /* IsSync */
+ .word 0 /* frame size */
+ .dword 0 /* method pointer (pointer to name) */
asm_calljavafunction2:
asm_calljavafunction2int:
.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.
+
*******************************************************************************/
.ent asm_handle_nat_exception
asm_handle_nat_exception:
- lw t0,0(ra) /* load instruction LDA PV,xxx(RA) */
- sll t0,t0,16
- sra t0,t0,16 /* isolate offset */
- aaddu pv,t0,ra /* compute update address */
+L_asm_handle_exception_stack_loop:
+ aaddiu sp,sp,-6*8 /* allocate stack */
+ ast xptr,0*8(sp) /* save exception pointer */
+ ast xpc,1*8(sp) /* save exception pc */
+ ast ra,3*8(sp) /* save return address */
+ ast zero,4*8(sp) /* save maybe-leaf flag (cleared) */
+
+ move a0,ra /* pass return address */
+ jal md_codegen_findmethod /* get PV from RA */
+ ast v0,2*8(sp) /* save data segment pointer */
+
+ ald a0,0*8(sp) /* pass exception pointer */
+ ald a1,1*8(sp) /* pass exception pc */
+ move a2,v0 /* pass data segment pointer */
+ aaddiu a3,sp,6*8 /* pass Java stack pointer */
+
+ b L_asm_handle_exception_continue
.aent asm_handle_exception
asm_handle_exception:
- aaddiu sp,sp,-14*8 /* allocate stack */
-
- sd v0,0*8(sp) /* save possible used registers */
- sd t0,1*8(sp) /* also registers used by trace_exception */
- sd t1,2*8(sp)
- sd t2,3*8(sp)
- sd t3,4*8(sp)
- sd t8,5*8(sp)
- sd a0,6*8(sp)
- sd a1,7*8(sp)
- sd a2,8*8(sp)
- sd a3,9*8(sp)
- sd a4,10*8(sp)
- sd a5,11*8(sp)
- sd a6,12*8(sp)
- sd a7,13*8(sp)
-
- addu t3,zero,1 /* set no unwind flag */
-ex_stack_loop:
- aaddiu sp,sp,-6*8 /* allocate stack */
- sd xptr,0*8(sp) /* save used registers */
- sd xpc,1*8(sp)
- sd pv,2*8(sp)
- sd ra,3*8(sp)
- sd t3,4*8(sp)
-
- move a0,xptr
- ald a1,MethodPointer(pv)
- move a2,xpc
-/* move a3,t3 */
- move a3,zero
- addu a4,zero,1
- jal builtin_trace_exception /* trace_exception(xptr,methodptr) */
+ aaddiu sp,sp,-(ARG_CNT+TMP_CNT)*8 /* 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 */
+
+ aaddiu sp,sp,-6*8 /* allocate stack */
+ ast xptr,0*8(sp) /* save exception pointer */
+ ast xpc,1*8(sp) /* save exception pc */
+ ast pv,2*8(sp) /* save data segment pointer */
+ ast ra,3*8(sp) /* save return address */
+ addu t0,zero,1 /* set maybe-leaf flag */
+ ast t0,4*8(sp) /* save maybe-leaf flag */
+
+ move a0,xptr /* pass exception pointer */
+ move a1,xpc /* pass exception pc */
+ move a2,pv /* pass data segment pointer */
+ aaddiu a3,sp,(ARG_CNT+TMP_CNT+6)*8 /* pass Java stack pointer */
+
+L_asm_handle_exception_continue:
+ jal exceptions_handle_exception
- ld xptr,0*8(sp) /* restore used register */
- ld xpc,1*8(sp)
- ld pv,2*8(sp)
- ld ra,3*8(sp)
- ld t3,4*8(sp)
- aaddiu sp,sp,6*8 /* deallocate stack */
+ beqz v0,L_asm_handle_exception_not_catched
+
+ move xpc,v0 /* move handlerpc into xpc */
+ ald xptr,0*8(sp) /* restore exception pointer */
+ ald pv,2*8(sp) /* restore data segment pointer */
+ ald ra,3*8(sp) /* restore return address */
+ ald t0,4*8(sp) /* get maybe-leaf flag */
+ aaddiu sp,sp,6*8 /* free stackframe */
- lw t0,ExTableSize(pv) /* t0 = exception table size */
- beqz t0,empty_table /* if empty table skip */
- aaddiu t1,pv,ExTableStart /* t1 = start of exception table */
-
-ex_table_loop:
- ald t2,ExStartPC(t1) /* t2 = exception start pc */
- sle t2,t2,xpc /* t2 = (startpc <= xpc) */
- beqz t2,ex_table_cont /* if (false) continue */
- ald t2,ExEndPC(t1) /* t2 = exception end pc */
- slt t2,xpc,t2 /* t2 = (xpc < endpc) */
- beqz t2,ex_table_cont /* if (false) continue */
- ald a1,ExCatchType(t1) /* arg1 = exception catch type */
- beqz a1,ex_handle_it /* NULL catches everything */
-
- lw itmp3,offclassloaded(a1)
- bnez itmp3,L_class_loaded
-
- aaddiu sp,sp,-8*8 /* allocate stack */
- sd t0,0*8(sp) /* save used register */
- sd t1,1*8(sp)
- sd t3,2*8(sp)
- sd xptr,3*8(sp)
- sd xpc,4*8(sp)
- sd pv,5*8(sp)
- sd ra,6*8(sp)
- sd a1,7*8(sp)
-
- move a0,a1
- jal load_class_bootstrap
-
- ld t0,0*8(sp) /* restore used register */
- ld t1,1*8(sp)
- ld t3,2*8(sp)
- ld xptr,3*8(sp)
- ld xpc,4*8(sp)
- ld pv,5*8(sp)
- ld ra,6*8(sp)
- ld a1,7*8(sp)
- aaddiu sp,sp,8*8 /* deallocate stack */
-
-L_class_loaded:
- lw itmp3,offclasslinked(a1)
- aaddiu sp,sp,-8*8 /* allocate stack */
- sd a1,7*8(sp)
- bnez itmp3,L_class_linked
-
- sd t0,0*8(sp) /* save used register */
- sd t1,1*8(sp)
- sd t3,2*8(sp)
- sd xptr,3*8(sp)
- sd xpc,4*8(sp)
- sd pv,5*8(sp)
- sd ra,6*8(sp)
-
- move a0,a1
- jal link_class
-
- ld t0,0*8(sp) /* restore used register */
- ld t1,1*8(sp)
- ld t3,2*8(sp)
- ld xptr,3*8(sp)
- ld xpc,4*8(sp)
- ld pv,5*8(sp)
- ld ra,6*8(sp)
-
-L_class_linked:
-_crit_restart1:
- ld a1,7*8(sp)
-_crit_begin1:
- ald a0,offobjvftbl(xptr) /* a0 = vftblptr(xptr) */
- ald a1,offclassvftbl(a1) /* a1 = vftblptr(catchtype) class (not obj) */
- lw a0,offbaseval(a0) /* a0 = baseval(xptr) */
- lw v0,offbaseval(a1) /* a2 = baseval(catchtype) */
- lw a1,offdiffval(a1) /* a1 = diffval(catchtype) */
-_crit_end1:
- subu a0,a0,v0 /* a0 = baseval(xptr) - baseval(catchtype) */
- sltu v0,a1,a0 /* v0 = xptr is instanceof catchtype */
- aaddiu sp,sp,8*8 /* deallocate stack */
- bnez v0,ex_table_cont /* if (false) continue */
-
-ex_handle_it:
- ald xpc,ExHandlerPC(t1) /* xpc = exception handler pc */
-
- beqz t3,ex_jump /* if (!(no stack unwinding) skip */
-
- ld v0,0*8(sp) /* restore possible used registers */
- ld t0,1*8(sp) /* also registers used by trace_exception */
- ld t1,2*8(sp)
- ld t2,3*8(sp)
- ld t3,4*8(sp)
- ld t8,5*8(sp)
- ld a0,6*8(sp)
- ld a1,7*8(sp)
- ld a2,8*8(sp)
- ld a3,9*8(sp)
- ld a4,10*8(sp)
- ld a5,11*8(sp)
- ld a6,12*8(sp)
- ld a7,13*8(sp)
-
- aaddiu sp,sp,14*8 /* deallocate stack */
-
-ex_jump:
- jr xpc /* jump to the handler */
-
-ex_table_cont:
- aaddiu t1,t1,ExEntrySize /* next exception table entry */
- addiu t0,t0,-1 /* decrement entry counter */
- bgtz t0,ex_table_loop /* if (t0 > 0) next entry */
-
-empty_table:
- beqz t3,ex_already_cleared /* if here the first time, then */
- aaddiu sp,sp,14*8 /* deallocate stack and */
- move t3,zero /* clear the no unwind flag */
-ex_already_cleared:
- lw t0,IsSync(pv) /* t0 = SyncOffset */
- beqz t0,no_monitor_exit /* if zero no monitorexit */
-
-#if defined(USE_THREADS)
- aaddu t0,sp,t0 /* add stackptr to Offset */
- ald a0,-8(t0) /* load monitorexit pointer */
-
- aaddiu sp,sp,-8*8 /* allocate stack */
- sd t0,0*8(sp) /* save used register */
- sd t1,1*8(sp)
- sd t3,2*8(sp)
- sd xptr,3*8(sp)
- sd xpc,4*8(sp)
- sd pv,5*8(sp)
- sd ra,6*8(sp)
-
- jal builtin_monitorexit /* builtin_monitorexit(objectptr) */
+ beqz 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 */
- ld t0,0*8(sp) /* restore used register */
- ld t1,1*8(sp)
- ld t3,2*8(sp)
- ld xptr,3*8(sp)
- ld xpc,4*8(sp)
- ld pv,5*8(sp)
- ld ra,6*8(sp)
- aaddiu sp,sp,8*8 /* deallocate stack */
-#endif
+ aaddiu sp,sp,(ARG_CNT+TMP_CNT)*8 /* remove maybe-leaf stackframe */
+
+L_asm_handle_exception_no_leaf:
+ jr xpc /* jump to the handler */
-no_monitor_exit:
- lw t0,FrameSize(pv) /* t0 = frame size */
- aaddu sp,sp,t0 /* unwind stack */
- move t0,sp /* t0 = pointer to save area */
- lw t1,IsLeaf(pv) /* t1 = is leaf procedure */
- bnez t1,ex_no_restore /* if (leaf) skip */
- ld ra,-8(t0) /* restore ra */
- aaddiu t0,t0,-8 /* t0-- */
-ex_no_restore:
- move xpc,ra /* the new xpc is ra */
- lw t1,IntSave(pv) /* t1 = saved int register count */
- ala t2,ex_int2 /* t2 = current pc */
- sll t1,t1,2 /* t1 = register count * 4 */
- asubu t2,t2,t1 /* t2 = ex_int_sav - 4 * register count */
- jr t2 /* jump to save position */
- ld s0,-8*8(t0)
- ld s1,-7*8(t0)
- ld s2,-6*8(t0)
- ld s3,-5*8(t0)
- ld s4,-4*8(t0)
- ld s5,-3*8(t0)
- ld s6,-2*8(t0)
- ld s7,-1*8(t0)
+L_asm_handle_exception_not_catched:
+ ald xptr,0*8(sp) /* restore exception pointer */
+ ald pv,2*8(sp) /* restore data segment pointer */
+ ald ra,3*8(sp) /* restore return address */
+ ald t0,4*8(sp) /* get maybe-leaf flag */
+ aaddiu sp,sp,6*8 /* free stackframe */
+
+ beqz t0,L_asm_handle_exception_no_leaf_stack
+
+ aaddiu sp,sp,(ARG_CNT+TMP_CNT)*8 /* remove maybe-leaf stackframe */
+ move t0,zero /* clear the maybe-leaf flag */
+
+L_asm_handle_exception_no_leaf_stack:
+ lw t1,FrameSize(pv) /* get frame size */
+ aaddu t1,sp,t1 /* pointer to save area */
+
+ lw t2,IsLeaf(pv) /* is leaf procedure */
+ bnez t2,L_asm_handle_exception_no_ra_restore
+
+ ald ra,-1*8(t1) /* restore ra */
+ aaddiu t1,t1,-8 /* t1-- */
+
+L_asm_handle_exception_no_ra_restore:
+ move xpc,ra /* the new xpc is ra */
+ lw t2,IntSave(pv) /* t1 = saved int register count */
+ ala t3,ex_int2 /* t3 = current pc */
+ sll t2,t2,2 /* t2 = register count * 4 */
+ asubu t3,t3,t2 /* t3 = IntSave - 4 * register count */
+ jr t3 /* jump to save position */
+
+ ald s0,-8*8(t1)
+ ald s1,-7*8(t1)
+ ald s2,-6*8(t1)
+ ald s3,-5*8(t1)
+ ald s4,-4*8(t1)
+ ald s5,-3*8(t1)
+ ald s6,-2*8(t1)
+ ald s7,-1*8(t1)
ex_int2:
- sll t1,t1,1 /* t1 = register count * 4 * 2 */
- asubu t0,t0,t1 /* t0 = t0 - 8 * register count */
-
- lw t1,FltSave(pv) /* t1 = saved flt register count */
- ala t2,ex_flt2 /* t2 = current pc */
- sll t1,t1,2 /* t1 = register count * 4 */
- asubu t2,t2,t1 /* t2 = ex_int_sav - 4 * register count */
- jr t2 /* jump to save position */
- ldc1 fs0,-4*8(t0)
- ldc1 fs1,-3*8(t0)
- ldc1 fs2,-2*8(t0)
- ldc1 fs3,-1*8(t0)
+ sll t2,t2,1 /* t2 = register count * 4 * 2 */
+ asubu t1,t1,t2 /* t1 = t0 - 8 * register count */
+
+ lw t2,FltSave(pv) /* t2 = saved flt register count */
+ ala t3,ex_flt2 /* t3 = current pc */
+ sll t2,t2,2 /* t2 = register count * 4 */
+ asubu t3,t3,t2 /* t3 = ex_int_sav - 4 * register count */
+ jr t3 /* jump to save position */
+
+ ldc1 fs0,-4*8(t1)
+ ldc1 fs1,-3*8(t1)
+ ldc1 fs2,-2*8(t1)
+ ldc1 fs3,-1*8(t1)
+
ex_flt2:
- lw t0,0(ra) /* load instruction LDA PV,xxx(RA) */
- sll t0,t0,16
- sra t0,t0,16 /* isolate offset */
- aaddu pv,t0,ra /* compute update address */
- b ex_stack_loop
+ lw t1,FrameSize(pv) /* get frame size */
+ aaddu sp,sp,t1 /* unwind stack */
+ b L_asm_handle_exception_stack_loop
.end asm_handle_nat_exception
.ent asm_getclassvalues_atomic
asm_getclassvalues_atomic:
-_crit_restart2:
-_crit_begin2:
+_crit_restart:
+_crit_begin:
lw t0,offbaseval(a0)
lw t1,offdiffval(a0)
lw t2,offbaseval(a1)
-_crit_end2:
+_crit_end:
sw t0,offcast_super_baseval(a2)
sw t1,offcast_super_diffval(a2)
sw t2,offcast_sub_baseval(a2)
asm_criticalsections:
#if defined(USE_THREADS) && defined(NATIVE_THREADS)
- .dword _crit_begin1
- .dword _crit_end1
- .dword _crit_restart1
- .dword _crit_begin2
- .dword _crit_end2
- .dword _crit_restart2
+ .dword _crit_begin
+ .dword _crit_end
+ .dword _crit_restart
#endif
.dword 0
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