/* src/vm/jit/arm/asmpart.S - Java-C interface functions for ARM
- 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: Michael Starzinger
-
- Changes: Christian Thalinger
-
- $Id: asmpart.S 6541 2006-08-22 14:48:01Z twisti $
-
*/
#include "config.h"
-#include "vm/jit/arm/offsets.h"
#include "vm/jit/arm/md-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_abstractmethoderror
- .globl asm_patcher_wrapper
-
.globl asm_cacheflush
- .globl asm_getclassvalues_atomic
- .globl asm_criticalsections
-
-
#if !defined(ENABLE_THREADS)
asm_exceptionptr:
.word _no_threads_exceptionptr
#endif
-asm_jitcompilerptr:
- .word asm_call_jit_compiler
-
-asm_criticalsections:
-#if defined(ENABLE_THREADS)
- .word _crit_begin
- .word _crit_end
- .word _crit_restart
-#endif
- .word 0
-
/* asm_vm_call_method **********************************************************
/* asm_vm_call_method_float:
asm_vm_call_method_double: */
SAVE_SCRATCH_REGISTERS /* save our personal scratch regs */
- stmfd sp!, {v1} /* V1 is used to recompute SP ... */
- mov v1, #0 /* ... when using stack arguments */
- ldr ip, asm_jitcompilerptr
- str ip, [sp, #-4]! /* store fake address */
- mov mptr, sp /* set method pointer */
+ stmfd sp!, {v1} /* V1 is used to remember SP */
+ str a0, [sp, #-4]! /* store methods entrypoint */
- mov itmp1, a1 /* pass methodinfo* via ITMP1 */
+ mov v1, sp /* remember SP */
- cmp a2, #0 /* do we have arguments? */
- ble asm_calljava_copyfinish /* no -> do not care :-) */
+ mov itmp1, a1 /* address of data structure */
+ mov itmp3, a2 /* stack argument count */
- /* REMEMBER: stack space for arguments is reserved here! */
- /* TODO: we possibly reserve to much here */
- mov v1, a2, lsl #3 /* how much stack do we alloc? */
- sub sp, sp, v1 /* allocate stack for arguments! */
+ ldr a0, [itmp1], #8 /* load argument registers */
+ ldr a1, [itmp1], #8
+ ldr a2, [itmp1], #8
+ ldr a3, [itmp1], #8
- mov itmp3, #0 /* stack position */
+ cmp itmp3, #0 /* do we have stack arguments? */
+ ble asm_calljava_copyfinish /* no -> do not care :-) */
+
+ mov itmp2, #0
+ sub sp, sp, itmp3, lsl #3 /* create stackframe for arguments */
asm_calljava_copyloop: /* reorder stack arguments! */
-#if defined(__ARMEL__)
- ldr ip, [a3,#offvmargdata] /* get LOW word of argument */
- str ip, [sp, itmp3]
- add itmp3, itmp3, #4
- ldr ip, [a3,#offvmargtype] /* is it a 2_WORD_TYPE? */
- tst ip, #1
- ldrne ip, [a3,#offvmargdata + 4] /* yes -> get HIGH word of argument */
- strne ip, [sp, itmp3]
- addne itmp3, itmp3, #4
-#else /* defined(__ARMEB__) */
- ldr ip, [a3,#offvmargtype + 4] /* get our item type (it is u8) */
- teq ip, #2 /* is it a TYPE_FLOAT? */
- ldreq ip, [a3,#offvmargdata] /* yes -> get LOW word of float */
- streq ip, [sp, itmp3]
- addeq itmp3, itmp3, #4
- beq asm_calljava_copydone
- tst ip, #1 /* is it a 2_WORD_TYPE? */
- ldrne ip, [a3,#offvmargdata] /* yes -> get HIGH word of argument */
- strne ip, [sp, itmp3]
- addne itmp3, itmp3, #4
- ldr ip, [a3,#offvmargdata + 4] /* get LOW word of argument */
- str ip, [sp, itmp3]
- add itmp3, itmp3, #4
-asm_calljava_copydone:
-#endif
- add a3, a3, #sizevmarg /* next argument block */
- subs a2, a2, #1
+ ldr ip, [itmp1], #4 /* load argument */
+ str ip, [sp, itmp2] /* store argument on stack */
+ add itmp2, itmp2, #4 /* next stackslot */
+ ldr ip, [itmp1], #4 /* load argument */
+ str ip, [sp, itmp2] /* store argument on stack */
+ add itmp2, itmp2, #4 /* next stackslot */
+ subs itmp3, itmp3, #1 /* next argument */
bgt asm_calljava_copyloop
- /* REMEMBER: first four args are passed in regs, take them out again */
- ldmfd sp, {a1, a2, a3, a4} /* load first four args to register */
- cmp v1, #16 /* do we have four arguments? */
- addlt sp, sp, v1
- movlt v1, #0
- addge sp, sp, #16
- subge v1, v1, #16
-
asm_calljava_copyfinish:
+ mov mptr, v1 /* set method pointer */
+
/* REMEMBER: do the method call just like in java! */
ldr ip, [mptr] /* fake virtual function call */
- mov lr, pc
- mov pc, ip
-fake2:
- sub ip, pc, #(fake2 - asm_vm_call_method)+8
+ mov lr, pc
+ mov pc, ip
+fake:
+ sub ip, pc, #(fake - asm_vm_call_method)+8
- add sp, sp, v1 /* free stack arguments! */
+ mov sp, v1 /* restore SP */
add sp, sp, #4 /* free fake address */
ldmfd sp!, {v1}
RESTORE_SCRATCH_REGS_AND_RETURN /* return to caller, restore regs */
asm_vm_call_method_exception_handler:
- mov a1, xptr /* exception pointer is arg1 */
+ mov a0, xptr /* exception pointer is arg1 */
bl builtin_throw_exception /* throw the exception */
mov res1, #0 /* return NULL */
mov res2, #0 /* return NULL */
- add sp, sp, v1 /* free stack arguments! */
+ mov sp, v1 /* restore SP */
add sp, sp, #4 /* free fake address */
ldmfd sp!, {v1}
RESTORE_SCRATCH_REGS_AND_RETURN /* return to caller, restore regs */
asm_vm_call_method_float:
- mov a1,#0x51
- b asm_debug
+ mov a0,#0x51
+ b asm_debug
asm_vm_call_method_double:
- mov a1,#0x52
- b asm_debug
+ mov a0,#0x52
+ b asm_debug
+
+asm_vm_call_method_end:
/****************** function asm_call_jit_compiler *****************************
* *
*******************************************************************************/
-#define MYSTACKSIZE (5*4)
+#define MYSTACKSIZE (6*4)
asm_call_jit_compiler:
SAVE_ARGUMENT_REGISTERS /* save our argument registers & LR */
+ sub sp, sp, #4 /* keep stack 8-byte aligned */
- mov a1, itmp1 /* pass methodinfo pointer */
- mov a2, mptr /* pass method pointer */
- add a3, sp, #MYSTACKSIZE /* pass Java sp */
- mov a4, lr /* pass Java RA (correct for leafs) */
+ mov a0, itmp1 /* pass methodinfo pointer */
+ mov a1, mptr /* pass method pointer */
+ add a2, sp, #MYSTACKSIZE /* pass Java sp */
+ mov a3, lr /* pass Java RA (correct for leafs) */
bl jit_asm_compile
mov itmp1, res1 /* save pointer to new jit-code */
tst itmp1,itmp1 /* check for exeption */
beq L_asm_call_jit_compiler_exception
+ add sp, sp, #4 /* keep stack 8-byte aligned */
RESTORE_ARGUMENT_REGISTERS /* load our argument registers & LR */
mov ip, itmp1
bl exceptions_get_and_clear_exception
mov xptr, res1 /* get exception */
+ add sp, sp, #4 /* keep stack 8-byte aligned */
RESTORE_ARGUMENT_REGISTERS /* load LR */
sub xpc, lr, #4 /* xpc = instruction that called us */
asm_handle_nat_exception:
/*TODO:maybe make a macro out of it!!!*/
SAVE_ARGUMENT_REGISTERS
- mov a1, lr
+ mov a0, lr
bl md_codegen_get_pv_from_pc
mov ip, res1
RESTORE_ARGUMENT_REGISTERS
asm_handle_exception:
stmfd sp!, {r0 - r3} /* save possible used registers */
mov itmp3, #1 /* set maybe-leaf flag */
- mov a4, #(4*4) /* prepare a4 for handle_exception */
+ mov a3, #(4*4) /* prepare a3 for handle_exception */
asm_handle_exception_loop:
stmfd sp!, {ip,lr} /* call exception helper here! */
- mov a1, xptr /* pass exception pointer */
- mov a2, xpc /* pass exception pointer */
- mov a3, ip /* pass data segment pointer */
- add a4, sp, a4 /* calculate Java sp into a4... */
- add a4, a4, #(2*4)
+ mov a0, xptr /* pass exception pointer */
+ mov a1, xpc /* pass exception pointer */
+ mov a2, ip /* pass data segment pointer */
+ add a3, sp, a3 /* calculate Java sp into a3... */
+ add a3, a3, #(2*4)
bl exceptions_handle_exception
ldmfd sp!, {ip,lr}
- tst a1, a1
+ tst a0, a0
beq asm_handle_exception_not_catched
- mov xpc, a1 /* move handlerpc into xpc */
+ mov xpc, a0 /* move handlerpc into xpc */
tst itmp3,itmp3 /* if this is a lead method ... */
ldmnefd sp!, {r0 - r3} /* restore argument registers */
addne sp, sp, #(4*4) /* remove maybe-leaf stackframe */
movne itmp3, #0 /* remove maybe-leaf flag */
- ldr a3, [ip, #FrameSize] /* t2 = frame size */
- add a1, sp, a3 /* t0 = pointer to save area */
- ldr a2, [ip, #IsLeaf] /* t1 = is leaf procedure */
- tst a2, a2 /* if is leaf ... */
- ldreq lr, [a1, #-4]! /* ... restore RA */
+ ldr a2, [ip, #FrameSize] /* t2 = frame size */
+ add a0, sp, a2 /* t0 = pointer to save area */
+ ldr a1, [ip, #IsLeaf] /* t1 = is leaf procedure */
+ tst a1, a1 /* if is leaf ... */
+ ldreq lr, [a0, #-4]! /* ... restore RA */
mov xpc, lr /* the new xpc is RA */
- ldr a2, [ip, #IntSave] /* t1 = saved int register count */
- rsb a2, a2, #5 /* t1 = count of unsaved registers */
- sub a2, a2, #1
- add pc, pc, a2, lsl #2 /* do not load unsaved registers */
- ldr v1, [a1, #-20] /* ... but restore the other ones */
- ldr v2, [a1, #-16]
- ldr v3, [a1, #-12]
- ldr v4, [a1, #- 8]
- ldr v5, [a1, #- 4]
+ ldr a1, [ip, #IntSave] /* t1 = saved int register count */
+ rsb a1, a1, #5 /* t1 = count of unsaved registers */
+ sub a1, a1, #1
+ add pc, pc, a1, lsl #2 /* do not load unsaved registers */
+ ldr v1, [a0, #-20] /* ... but restore the other ones */
+ ldr v2, [a0, #-16]
+ ldr v3, [a0, #-12]
+ ldr v4, [a0, #- 8]
+ ldr v5, [a0, #- 4]
- add sp, sp, a3 /* unwind stack (using t2) */
- mov a4, #0 /* prepare a4 for handle_exception */
+ add sp, sp, a2 /* unwind stack (using t2) */
+ mov a3, #0 /* prepare a3 for handle_exception */
/*TODO:maybe make a macro out of it!!!*/
SAVE_ARGUMENT_REGISTERS
- mov a1, lr
+ mov a0, lr
bl md_codegen_get_pv_from_pc
mov ip, res1
RESTORE_ARGUMENT_REGISTERS
b asm_handle_exception_loop
-/* asm_patcher_wrapper *********************************************************
-* *
-* TODO: document me *
-* *
-* Stack layout when calling patcher function: *
-* 24 saved REG_ITMP3, should be restored ( -4) *
-* 20 data segment displacement from load instructions ( -8) *
-* 16 return address into JIT code (patch position) (-12) *
-* 12 pointer to virtual java_objectheader *
-* 8 machine code (which is patched back later) *
-* [ 8 result of patcher function (indicates exception) ] *
-* 4 unresolved class/method/field reference *
-* [ 0 patcher function pointer to call ] *
-* 0 saved IP of caller (caller needs it!) *
-* *
-*******************************************************************************/
-
-#define PATCHSTACKSIZE 7*4
-
-asm_patcher_wrapper:
- mov itmp3, sp /* preserve original SP in ITMP3 */
-
- SAVE_ARGUMENT_REGISTERS_IP /* save our argument registers & LR */
- SAVE_FLOAT_REGISTERS /* save our float registers here */
-
- mov a1, itmp3 /* pass SP of patcher stub */
- mov a2, ip /* pass PV */
- mov a3, lr /* pass RA (correct for leafs) */
- bl patcher_wrapper
- mov itmp3, res1 /* save return value */
-
- RESTORE_FLOAT_REGISTERS /* restore our float registers here */
- RESTORE_ARGUMENT_REGISTERS_IP /* load our argument registers & LR */
-
- tst itmp3, itmp3 /* check for an exception */
- bne L_asm_patcher_wrapper_exception
-
- add sp, sp, #PATCHSTACKSIZE /* remove patcher stack frame */
-
- ldr itmp3, [sp, #-4] /* restore ITMP3 for calling method */
- ldr pc, [sp, #-12] /* jump to new patched code */
-
-L_asm_patcher_wrapper_exception:
- mov xptr, itmp3 /* get exception */
- ldr xpc, [sp, #16] /* RA is xpc */
-
- add sp, sp, #PATCHSTACKSIZE /* remove patcher stack frame */
-
- b asm_handle_exception
-
-
/* asm_abstractmethoderror *****************************************************
Creates and throws an AbstractMethodError.
asm_abstractmethoderror:
stmfd sp!, {lr} /* save return address */
- add a1, sp, #(1*4) /* pass java sp */
- mov a2, lr /* pass exception address */
+ add a0, sp, #(1*4) /* pass java sp */
+ mov a1, lr /* pass exception address */
bl exceptions_asm_new_abstractmethoderror
ldmfd sp!, {lr} /* restore return address */
#if 1
.equ sys_cacheflush, 0x9f0002
asm_cacheflush:
- add a2, a1, a2
- mov a3, #0
- #if 1
- /* TODO: repeair this! */
- /* cacheflush is messed up beyond all repair! */
- mov a1, #0x0
- mov a2, #0xff000000
- #endif
- swi #sys_cacheflush
- mov pc, lr
-#else
-.equ IMBa, 0xf00000
-.equ IMBb, 0xf00001
-asm_cacheflush:
- /* clean and invalidate the entire cache!!! */
- swi #IMBa
- mov pc, lr
+ add a1, a0, a1
+ mov a2, #0
+
+#if 0
+ /* TWISTI: required on iyonix, maybe a linux-2.4 bug */
+ /* TODO: repeair this! */
+ /* cacheflush is messed up beyond all repair! */
+ mov a0, #0x0
+ mov a1, #0xff000000
#endif
-
-/********************* function asm_getclassvalues_atomic *********************/
-
-asm_getclassvalues_atomic:
- stmfd sp!, {r4, r5, r6}
-_crit_restart:
-_crit_begin:
- ldr r4,[a1,#offbaseval]
- ldr r5,[a1,#offdiffval]
- ldr r6,[a2,#offbaseval]
-_crit_end:
- str r4,[a3,#offcast_super_baseval]
- str r5,[a3,#offcast_super_diffval]
- str r6,[a3,#offcast_sub_baseval]
- ldmfd sp!, {r4, r5, r6}
+ swi #sys_cacheflush
mov pc, lr
+#endif
-/* 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
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