/* src/vm/jit/alpha/asmpart.S - Java-C interface functions for alpha
- Copyright (C) 1996-2005, 2006 R. Grafl, A. Krall, C. Kruegel,
+ 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
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
- Contact: cacao@cacaojvm.org
-
- Authors: Andreas Krall
- Reinhard Grafl
-
- Changes: Joseph Wenninger
- Christian Thalinger
- Edwin Steiner
-
- $Id: asmpart.S 4921 2006-05-15 14:24:36Z twisti $
-
*/
#include "vm/jit/alpha/md-abi.h"
#include "vm/jit/alpha/md-asm.h"
-#include "vm/jit/alpha/offsets.h"
#include "vm/jit/abi-asm.h"
#include "vm/jit/methodheader.h"
.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_abstractmethoderror
- .globl asm_replacement_out
- .globl asm_replacement_in
-
- .globl asm_perform_threadswitch
- .globl asm_initialize_thread_stack
- .globl asm_switchstackandcall
- .globl asm_criticalsections
- .globl asm_getclassvalues_atomic
+ .globl asm_compare_and_swap
+ .globl asm_memory_barrier
.globl asm_md_init
.globl asm_cacheflush
.long 0 /* isleaf */
.long 0 /* IsSync */
.long 0 /* frame size */
- .quad 0 /* method pointer (pointer to name) */
+ .quad 0 /* codeinfo pointer */
asm_vm_call_method:
asm_vm_call_method_int:
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 s6,3*8(sp)
-
- stq a0,4*8(sp) /* save method pointer for compiler */
-
- mov a2,t0 /* pointer to arg block */
- mov a1,s6 /* arg count */
-
- ble s6,calljava_argsloaded
- lda s6,-1(s6)
- ldq a0,offvmargdata(t0)
- ldt $f16,offvmargdata(t0)
- ble s6,calljava_argsloaded
-
- lda s6,-1(s6)
- ldq a1,offvmargdata+sizevmarg*1(t0)
- ldt $f17,offvmargdata+sizevmarg*1(t0)
- ble s6,calljava_argsloaded
-
- lda s6,-1(s6)
- ldq a2,offvmargdata+sizevmarg*2(t0)
- ldt $f18,offvmargdata+sizevmarg*2(t0)
- ble s6,calljava_argsloaded
-
- lda s6,-1(s6)
- ldq a3,offvmargdata+sizevmarg*3(t0)
- ldt $f19,offvmargdata+sizevmarg*3(t0)
- ble s6,calljava_argsloaded
-
- lda s6,-1(s6)
- ldq a4,offvmargdata+sizevmarg*4(t0)
- ldt $f20,offvmargdata+sizevmarg*4(t0)
- ble s6,calljava_argsloaded
-
- lda s6,-1(s6)
- ldq a5,offvmargdata+sizevmarg*5(t0)
- ldt $f21,offvmargdata+sizevmarg*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,offvmargdata+sizevmarg*6(t0)
- stq t3,0(t2)
- lda t1,1(t1)
- lda t0,sizevmarg(t0)
- lda t2,8(t2)
- bne t1,calljava_copyloop
-
-calljava_nocopy:
- ldq itmp1,4*8(t4) /* pass method pointer via itmp1 */
-
- lda mptr,asm_call_jit_compiler/* fake virtual function call (2 instr) */
- stq mptr,2*8(t4) /* store function address */
- lda mptr,1*8(t4) /* set method pointer */
-
- ldq pv,1*8(mptr) /* method call as in Java */
- jmp ra,(pv) /* call JIT compiler */
-calljava_jit2:
- lda pv,(asm_vm_call_method - 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:
+ 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)
asm_vm_call_method_exception_handler:
- s8addq s6,sp,sp
- ldq gp,1*8(sp) /* restore global pointer */
+ mov s0,sp /* restore stack pointer */
+ 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 */
- jmp zero,(ra)
+
+asm_vm_call_method_end:
+ br L_asm_vm_call_method_recompute_return
.end asm_vm_call_method
/* directly to the caller (ra). */
L_asm_call_jit_compiler_exception:
-#if defined(ENABLE_THREADS)
subq sp,2*8,sp
stq ra,0*8(sp) /* save return address (xpc) */
- jsr ra,builtin_asm_get_exceptionptrptr
+ jsr ra,exceptions_get_and_clear_exception
ldq ra,0*8(sp) /* restore return address (xpc) */
addq sp,2*8,sp
-#else
- lda v0,_exceptionptr
-#endif
- ldq xptr,0(v0) /* get the exception pointer */
- stq zero,0(v0) /* clear the exception pointer */
- subq ra,4,xpc
+ 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
asm_handle_nat_exception:
L_asm_handle_nat_exception: /* required for PIC code */
- 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,L_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_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
SAVE_ARGUMENT_REGISTERS(0) /* we save arg and temp registers in */
SAVE_TEMPORARY_REGISTERS(ARG_CNT) /* case this is a leaf method */
- lda a3,(ARG_CNT+TMP_CNT)*8(zero)/* prepare a3 for handle_exception */
- lda a4,1(zero) /* set maybe-leaf flag */
+ 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 */
-L_asm_handle_exception_stack_loop:
- lda sp,-5*8(sp) /* allocate stack */
- stq xptr,0*8(sp) /* save exception pointer */
- stq xpc,1*8(sp) /* save exception pc */
- stq pv,2*8(sp) /* save data segment pointer */
- stq ra,3*8(sp) /* save return address */
- addq a3,sp,a3 /* calculate Java sp into a3... */
- addq a3,5*8,a3
- stq a4,4*8(sp) /* save maybe-leaf flag */
-
- br ra,L_asm_handle_exception_load_gp /* set ra for gp loading */
-L_asm_handle_exception_load_gp:
+ 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 exception pointer */
- mov xpc,a1 /* pass exception pc */
- mov pv,a2 /* pass data segment pointer */
- /* a3 is still set */
+ 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 exception pointer */
- ldq pv,2*8(sp) /* restore data segment pointer */
- ldq ra,3*8(sp) /* restore return address */
- ldq a4,4*8(sp) /* get maybe-leaf flag */
- lda sp,5*8(sp) /* free stack frame */
+ 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 a4,L_asm_handle_exception_no_leaf
+ 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 */
jmp zero,(xpc) /* jump to the handler */
L_asm_handle_exception_not_catched:
- ldq xptr,0*8(sp) /* restore exception pointer */
- ldq pv,2*8(sp) /* restore data segment pointer */
- ldq ra,3*8(sp) /* restore return address */
- ldq a4,4*8(sp) /* get maybe-leaf flag */
- lda sp,5*8(sp)
+ 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 a4,L_asm_handle_exception_no_leaf_stack
+ beq t0,L_asm_handle_exception_no_leaf_stack
lda sp,(ARG_CNT+TMP_CNT)*8(sp) /* remove maybe-leaf stackframe */
- mov zero,a4 /* clear the maybe-leaf flag */
+ mov zero,t0 /* clear the maybe-leaf flag */
L_asm_handle_exception_no_leaf_stack:
- ldl t0,FrameSize(pv) /* get frame size */
- addq t0,sp,t0 /* pointer to save area */
+ ldl t1,FrameSize(pv) /* get frame size */
+ addq t1,sp,t1 /* pointer to save area */
- ldl t1,IsLeaf(pv) /* is leaf procedure */
- bne t1,L_asm_handle_exception_no_ra_restore
+ ldl t2,IsLeaf(pv) /* is leaf procedure */
+ bne t2,L_asm_handle_exception_no_ra_restore
- ldq ra,-1*8(t0) /* restore ra */
- subq t0,8,t0 /* t0-- */
+ 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 t1,IntSave(pv) /* t1 = saved int register count */
- br t2,ex_int1 /* t2 = current pc */
+ ldl t2,IntSave(pv) /* t2 = saved int register count */
+ br t3,ex_int1 /* t3 = current pc */
ex_int1:
- lda t2,(ex_int2-ex_int1)(t2)
- negl t1,t1 /* negate register count */
- s4addq t1,t2,t2 /* t2 = IntSave - register count * 4 */
- jmp zero,(t2) /* jump to save position */
-
- ldq s0,-7*8(t0)
- ldq s1,-6*8(t0)
- ldq s2,-5*8(t0)
- ldq s3,-4*8(t0)
- ldq s4,-3*8(t0)
- ldq s5,-2*8(t0)
- ldq s6,-1*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,(ex_flt2-ex_flt1)(t2)
- negl t1,t1 /* negate register count */
- s4addq t1,t2,t2 /* t2 = FltSave - 4 * register count */
- jmp zero,(t2) /* jump to save position */
-
- ldt fs0,-8*8(t0)
- ldt fs1,-7*8(t0)
- ldt fs2,-6*8(t0)
- ldt fs3,-5*8(t0)
- ldt fs4,-4*8(t0)
- ldt fs5,-3*8(t0)
- ldt fs6,-2*8(t0)
- ldt fs7,-1*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,FrameSize(pv) /* get frame size */
- addq sp,t0,sp /* unwind stack */
- mov zero,a3 /* prepare a3 for handle_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,L_asm_handle_exception_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 */
-
+ 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 *********************************************************
-
- XXX
+/* asm_abstractmethoderror *****************************************************
- 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)
-
- ATTENTION: itmp3 == gp! But we don't need gp do call the patcher function.
+ Creates and throws an AbstractMethodError.
*******************************************************************************/
-
- .ent asm_wrapper_patcher
-
-asm_wrapper_patcher:
- lda sp,-((2+12+27+4)*8+sizestackframeinfo)(sp) /* create stack frame */
-
- SAVE_RETURN_REGISTERS(0) /* save 1 int/1 float return registers */
- SAVE_ARGUMENT_REGISTERS(2) /* save 6 int/6 float argument registers */
- SAVE_TEMPORARY_REGISTERS(14) /* save 11 int/16 float temporary registers */
-
- stq itmp1,(2+12+27+0)*8(sp) /* save itmp1 */
- stq itmp2,(2+12+27+1)*8(sp) /* save itmp2 */
- stq ra,(2+12+27+2)*8(sp) /* save method return address (for leafs) */
- stq pv,(2+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,(2+12+27+4)*8(sp) /* create stackframe info */
- mov pv,a1 /* pass java pv */
- lda a2,((6+2+12+27+4)*8+sizestackframeinfo)(sp) /* pass java sp */
- ldq a3,(2+12+27+2)*8(sp) /* this is correct for leafs */
- ldq a4,((5+2+12+27+4)*8+sizestackframeinfo)(sp) /* pass xpc */
- jsr ra,stacktrace_create_extern_stackframeinfo
- ldgp gp,0(ra)
-
- lda a0,((0+2+12+27+4)*8+sizestackframeinfo)(sp) /* pass sp */
- ldq pv,((0+2+12+27+4)*8+sizestackframeinfo)(sp) /* get function */
- ldq itmp1,(2+12+27+3)*8(sp) /* save pv to the position of fp */
- stq itmp1,((0+2+12+27+4)*8+sizestackframeinfo)(sp)
- jmp ra,(pv) /* call the patcher function */
- ldgp gp,0(ra)
- stq v0,((0+2+12+27+4)*8+sizestackframeinfo)(sp) /* save return value */
-
- lda a0,(2+12+27+4)*8(sp) /* remove stackframe info */
- jsr ra,stacktrace_remove_stackframeinfo
- ldgp gp,0(ra)
-
- RESTORE_RETURN_REGISTERS(0) /* restore 1 int/1 float return registers */
- RESTORE_ARGUMENT_REGISTERS(2) /* restore 6 int/6 float argument registers */
- RESTORE_TEMPORARY_REGISTERS(14) /* restore 11 integer temporary registers */
-
- ldq itmp1,(2+12+27+0)*8(sp) /* restore itmp1 */
- ldq itmp2,(2+12+27+1)*8(sp) /* restore itmp2 */
- ldq ra,(2+12+27+2)*8(sp) /* restore method return address (for leafs)*/
- ldq pv,(2+12+27+3)*8(sp) /* restore pv of calling java function */
-
- ldq itmp3,((0+2+12+27+4)*8+sizestackframeinfo)(sp) /* get return value*/
- beq itmp3,L_asm_wrapper_patcher_exception
-
- ldq itmp3,((5+2+12+27+4)*8+sizestackframeinfo)(sp)/* get RA to JIT */
- lda sp,((6+2+12+27+4)*8+sizestackframeinfo)(sp) /* remove stack frame */
-
- jmp zero,(itmp3) /* jump to new patched code */
-
-L_asm_wrapper_patcher_exception:
- ldq xpc,((5+2+12+27+4)*8+sizestackframeinfo)(sp) /* RA is xpc */
- lda sp,((6+2+12+27+4)*8+sizestackframeinfo)(sp) /* remove stack frame */
-
- 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(ENABLE_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 L_asm_handle_exception/* we have the pv of the calling java func. */
-
- .end asm_wrapper_patcher
-
-
-/* asm_replacement_out *********************************************************
-
- This code is jumped to from the replacement-out stubs that are executed
- when a thread reaches an activated replacement point.
-
- The purpose of asm_replacement_out is to read out the parts of the
- execution state that cannot be accessed from C code, store this state,
- and then call the C function replace_me.
-
- Stack layout:
- 16 start of stack inside method to replace
- 0 rplpoint * info on the replacement point that was reached
-
- NOTE: itmp3 has been clobbered by the replacement-out stub!
-
-*******************************************************************************/
-
-/* some room to accomodate changes of the stack frame size during replacement */
- /* XXX we should find a cleaner solution here */
-#define REPLACEMENT_ROOM 512
-
-#define REPLACEMENT_STACK_OFFSET ((sizeexecutionstate + REPLACEMENT_ROOM + 0xf) & ~0xf)
-
- .ent asm_replacement_out
-
-asm_replacement_out:
- /* create stack frame */
- lda sp,-(REPLACEMENT_STACK_OFFSET)(sp)
-
- /* save registers in execution state */
- stq $0 ,( 0*8+offes_intregs)(sp)
- stq $1 ,( 1*8+offes_intregs)(sp)
- stq $2 ,( 2*8+offes_intregs)(sp)
- stq $3 ,( 3*8+offes_intregs)(sp)
- stq $4 ,( 4*8+offes_intregs)(sp)
- stq $5 ,( 5*8+offes_intregs)(sp)
- stq $6 ,( 6*8+offes_intregs)(sp)
- stq $7 ,( 7*8+offes_intregs)(sp)
- stq $8 ,( 8*8+offes_intregs)(sp)
- stq $9 ,( 9*8+offes_intregs)(sp)
- stq $10,(10*8+offes_intregs)(sp)
- stq $11,(11*8+offes_intregs)(sp)
- stq $12,(12*8+offes_intregs)(sp)
- stq $13,(13*8+offes_intregs)(sp)
- stq $14,(14*8+offes_intregs)(sp)
- stq $15,(15*8+offes_intregs)(sp)
- stq $16,(16*8+offes_intregs)(sp)
- stq $17,(17*8+offes_intregs)(sp)
- stq $18,(18*8+offes_intregs)(sp)
- stq $19,(19*8+offes_intregs)(sp)
- stq $20,(20*8+offes_intregs)(sp)
- stq $21,(21*8+offes_intregs)(sp)
- stq $22,(22*8+offes_intregs)(sp)
- stq $23,(23*8+offes_intregs)(sp)
- stq $24,(24*8+offes_intregs)(sp)
- stq $25,(25*8+offes_intregs)(sp)
- stq $26,(26*8+offes_intregs)(sp)
- stq $27,(27*8+offes_intregs)(sp)
- stq $28,(28*8+offes_intregs)(sp)
- stq $29,(29*8+offes_intregs)(sp)
- stq $30,(30*8+offes_intregs)(sp)
- stq $31,(31*8+offes_intregs)(sp)
-
- stt $f0 ,( 0*8+offes_fltregs)(sp)
- stt $f1 ,( 1*8+offes_fltregs)(sp)
- stt $f2 ,( 2*8+offes_fltregs)(sp)
- stt $f3 ,( 3*8+offes_fltregs)(sp)
- stt $f4 ,( 4*8+offes_fltregs)(sp)
- stt $f5 ,( 5*8+offes_fltregs)(sp)
- stt $f6 ,( 6*8+offes_fltregs)(sp)
- stt $f7 ,( 7*8+offes_fltregs)(sp)
- stt $f8 ,( 8*8+offes_fltregs)(sp)
- stt $f9 ,( 9*8+offes_fltregs)(sp)
- stt $f10,(10*8+offes_fltregs)(sp)
- stt $f11,(11*8+offes_fltregs)(sp)
- stt $f12,(12*8+offes_fltregs)(sp)
- stt $f13,(13*8+offes_fltregs)(sp)
- stt $f14,(14*8+offes_fltregs)(sp)
- stt $f15,(15*8+offes_fltregs)(sp)
- stt $f16,(16*8+offes_fltregs)(sp)
- stt $f17,(17*8+offes_fltregs)(sp)
- stt $f18,(18*8+offes_fltregs)(sp)
- stt $f19,(19*8+offes_fltregs)(sp)
- stt $f20,(20*8+offes_fltregs)(sp)
- stt $f21,(21*8+offes_fltregs)(sp)
- stt $f22,(22*8+offes_fltregs)(sp)
- stt $f23,(23*8+offes_fltregs)(sp)
- stt $f24,(24*8+offes_fltregs)(sp)
- stt $f25,(25*8+offes_fltregs)(sp)
- stt $f26,(26*8+offes_fltregs)(sp)
- stt $f27,(27*8+offes_fltregs)(sp)
- stt $f28,(28*8+offes_fltregs)(sp)
- stt $f29,(29*8+offes_fltregs)(sp)
- stt $f30,(30*8+offes_fltregs)(sp)
- stt $f31,(31*8+offes_fltregs)(sp)
-
- /* calculate sp of method */
- lda itmp1,(REPLACEMENT_STACK_OFFSET + 2*8)(sp)
- stq itmp1,(offes_sp)(sp)
-
- br ra,L_asm_replacement_out_load_gp
-L_asm_replacement_out_load_gp:
- ldgp gp,0(ra) /* load gp */
-
- /* store pv */
- stq pv,(offes_pv)(sp)
-
- /* call replace_me */
- ldq a0,-(2*8)(itmp1) /* arg0: rplpoint * */
- mov sp,a1 /* arg1: execution state */
- jmp zero,replace_me /* call C function replace_me */
- jmp zero,abort /* NEVER REACHED */
- .end asm_replacement_out
+ .ent asm_abstractmethoderror
-/* asm_replacement_in **********************************************************
+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 */
- This code writes the given execution state and jumps to the replacement
- code.
-
- This function never returns!
+ mov v0,xptr /* get exception pointer */
+ subq ra,4,xpc /* exception address is ra - 4 */
+ br L_asm_handle_nat_exception
- NOTE: itmp3 is not restored!
+ .end asm_abstractmethoderror
- C prototype:
- void asm_replacement_in(executionstate *es);
-*******************************************************************************/
+/* asm_compare_and_swap ********************************************************
- .ent asm_replacement_in
-
-asm_replacement_in:
- /* a0 == executionstate *es */
+ Does an atomic compare and swap. Required for the lock
+ implementation.
- /* set new sp and pv */
- ldq sp,(offes_sp)(a0)
- ldq pv,(offes_pv)(a0)
-
- /* copy registers from execution state */
- ldq $0 ,( 0*8+offes_intregs)(a0)
- ldq $1 ,( 1*8+offes_intregs)(a0)
- ldq $2 ,( 2*8+offes_intregs)(a0)
- ldq $3 ,( 3*8+offes_intregs)(a0)
- ldq $4 ,( 4*8+offes_intregs)(a0)
- ldq $5 ,( 5*8+offes_intregs)(a0)
- ldq $6 ,( 6*8+offes_intregs)(a0)
- ldq $7 ,( 7*8+offes_intregs)(a0)
- ldq $8 ,( 8*8+offes_intregs)(a0)
- ldq $9 ,( 9*8+offes_intregs)(a0)
- ldq $10,(10*8+offes_intregs)(a0)
- ldq $11,(11*8+offes_intregs)(a0)
- ldq $12,(12*8+offes_intregs)(a0)
- ldq $13,(13*8+offes_intregs)(a0)
- ldq $14,(14*8+offes_intregs)(a0)
- ldq $15,(15*8+offes_intregs)(a0)
- /* a0 is loaded below */
- ldq $17,(17*8+offes_intregs)(a0)
- ldq $18,(18*8+offes_intregs)(a0)
- ldq $19,(19*8+offes_intregs)(a0)
- ldq $20,(20*8+offes_intregs)(a0)
- ldq $21,(21*8+offes_intregs)(a0)
- ldq $22,(22*8+offes_intregs)(a0)
- ldq $23,(23*8+offes_intregs)(a0)
- ldq $24,(24*8+offes_intregs)(a0)
- ldq $25,(25*8+offes_intregs)(a0)
- ldq $26,(26*8+offes_intregs)(a0)
- /* $27 is pv */
- ldq $28,(28*8+offes_intregs)(a0)
- ldq $29,(29*8+offes_intregs)(a0)
- /* $30 is sp */
- /* $31 is zero */
-
- ldt $f0 ,( 0*8+offes_fltregs)(a0)
- ldt $f1 ,( 1*8+offes_fltregs)(a0)
- ldt $f2 ,( 2*8+offes_fltregs)(a0)
- ldt $f3 ,( 3*8+offes_fltregs)(a0)
- ldt $f4 ,( 4*8+offes_fltregs)(a0)
- ldt $f5 ,( 5*8+offes_fltregs)(a0)
- ldt $f6 ,( 6*8+offes_fltregs)(a0)
- ldt $f7 ,( 7*8+offes_fltregs)(a0)
- ldt $f8 ,( 8*8+offes_fltregs)(a0)
- ldt $f9 ,( 9*8+offes_fltregs)(a0)
- ldt $f10,(10*8+offes_fltregs)(a0)
- ldt $f11,(11*8+offes_fltregs)(a0)
- ldt $f12,(12*8+offes_fltregs)(a0)
- ldt $f13,(13*8+offes_fltregs)(a0)
- ldt $f14,(14*8+offes_fltregs)(a0)
- ldt $f15,(15*8+offes_fltregs)(a0)
- ldt $f16,(16*8+offes_fltregs)(a0)
- ldt $f17,(17*8+offes_fltregs)(a0)
- ldt $f18,(18*8+offes_fltregs)(a0)
- ldt $f19,(19*8+offes_fltregs)(a0)
- ldt $f20,(20*8+offes_fltregs)(a0)
- ldt $f21,(21*8+offes_fltregs)(a0)
- ldt $f22,(22*8+offes_fltregs)(a0)
- ldt $f23,(23*8+offes_fltregs)(a0)
- ldt $f24,(24*8+offes_fltregs)(a0)
- ldt $f25,(25*8+offes_fltregs)(a0)
- ldt $f26,(26*8+offes_fltregs)(a0)
- ldt $f27,(27*8+offes_fltregs)(a0)
- ldt $f28,(28*8+offes_fltregs)(a0)
- ldt $f29,(29*8+offes_fltregs)(a0)
- ldt $f30,(30*8+offes_fltregs)(a0)
- ldt $f31,(31*8+offes_fltregs)(a0)
-
- /* load new pc */
-
- ldq itmp3,offes_pc(a0)
-
- /* load a0 */
-
- ldq a0,(16*8+offes_intregs)(a0)
-
- /* jump to new code */
+ Atomically do the following: Check if the location still contains
+ `oldval`. If so, replace it by `newval` and return `oldval`.
- jmp zero,(itmp3)
+ RETURN VALUE:
+ the old value at *p
- .end asm_replacement_in
+ long compare_and_swap(volatile long *p, long oldval, long newval);
-/******************* 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_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_initialize_thread_stack
+ .end asm_compare_and_swap
-/******************* function asm_perform_threadswitch *************************
-* *
-* void asm_perform_threadswitch (u1 **from, u1 **to, u1 **stackTop); *
-* *
-* performs a threadswitch *
-* *
-*******************************************************************************/
+/* asm_memory_barrier **********************************************************
- .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_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
+ A memory barrier for the Java Memory Model.
+*******************************************************************************/
- .ent asm_getclassvalues_atomic
+ .ent asm_memory_barrier
-asm_getclassvalues_atomic:
-_crit_restart:
-_crit_begin:
- ldl t0,offbaseval(a0)
- ldl t1,offdiffval(a0)
- ldl t2,offbaseval(a1)
-_crit_end:
- stl t0,offcast_super_baseval(a2)
- stl t1,offcast_super_diffval(a2)
- stl t2,offcast_sub_baseval(a2)
+asm_memory_barrier:
+ mb
jmp zero,(ra)
- .end asm_getclassvalues_atomic
-
-
- .data
-
-asm_criticalsections:
-#if defined(ENABLE_THREADS)
- .quad _crit_begin
- .quad _crit_end
- .quad _crit_restart
-#endif
- .quad 0
+ .end asm_memory_barrier
/* asm_md_init *****************************************************************
.end asm_cacheflush
-/* Disable exec-stacks, required for Gentoo ***********************************/
+/* disable exec-stacks ********************************************************/
-#if defined(__GCC__) && defined(__ELF__)
- .section .note.GNU-stack,"",@progbits
+#if defined(__linux__) && defined(__ELF__)
+ .section .note.GNU-stack,"",%progbits
#endif
projects / cacao.git / blobdiff