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android13/art/runtime/arch/x86/quick_entrypoints_x86.S

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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "asm_support_x86.S"
#include "interpreter/cfi_asm_support.h"
#include "arch/quick_alloc_entrypoints.S"
// For x86, the CFA is esp+4, the address above the pushed return address on the stack.
/*
* Macro that sets up the callee save frame to conform with
* Runtime::CreateCalleeSaveMethod(kSaveRefsOnly)
* and preserves the value of temp_reg at entry.
*/
MACRO1(SETUP_SAVE_REFS_ONLY_FRAME_PRESERVE_TEMP_REG, temp_reg)
PUSH edi // Save callee saves (ebx is saved/restored by the upcall)
PUSH esi
PUSH ebp
PUSH RAW_VAR(temp_reg) // Save temp_reg
subl MACRO_LITERAL(8), %esp // Grow stack by 2 words.
CFI_ADJUST_CFA_OFFSET(8)
LOAD_RUNTIME_INSTANCE \temp_reg
// Push save all callee-save method.
pushl RUNTIME_SAVE_REFS_ONLY_METHOD_OFFSET(REG_VAR(temp_reg))
CFI_ADJUST_CFA_OFFSET(4)
// Store esp as the top quick frame.
movl %esp, %fs:THREAD_TOP_QUICK_FRAME_OFFSET
// Restore temp_reg.
movl 12(%esp), REG_VAR(temp_reg)
CFI_RESTORE(RAW_VAR(temp_reg))
// Ugly compile-time check, but we only have the preprocessor.
// Last +4: implicit return address pushed on stack when caller made call.
#if (FRAME_SIZE_SAVE_REFS_ONLY != 3*4 + 16 + 4)
#error "FRAME_SIZE_SAVE_REFS_ONLY(X86) size not as expected."
#endif
END_MACRO
/*
* Macro that sets up the callee save frame to conform with
* Runtime::CreateCalleeSaveMethod(kSaveRefsAndArgs)
*/
MACRO1(SETUP_SAVE_REFS_AND_ARGS_FRAME, temp_reg)
SETUP_SAVE_REFS_AND_ARGS_FRAME_REGISTERS_ONLY
LOAD_RUNTIME_INSTANCE \temp_reg
// Push save all callee-save method.
pushl RUNTIME_SAVE_REFS_AND_ARGS_METHOD_OFFSET(REG_VAR(temp_reg))
CFI_ADJUST_CFA_OFFSET(4)
// Store esp as the stop quick frame.
movl %esp, %fs:THREAD_TOP_QUICK_FRAME_OFFSET
END_MACRO
/*
* Macro that sets up the callee save frame to conform with
* Runtime::CreateCalleeSaveMethod(kSaveRefsAndArgs) where the method is passed in EAX.
*/
MACRO0(SETUP_SAVE_REFS_AND_ARGS_FRAME_WITH_METHOD_IN_EAX)
SETUP_SAVE_REFS_AND_ARGS_FRAME_REGISTERS_ONLY
pushl %eax // Store the ArtMethod reference at the bottom of the stack.
CFI_ADJUST_CFA_OFFSET(4)
// Store esp as the stop quick frame.
movl %esp, %fs:THREAD_TOP_QUICK_FRAME_OFFSET
END_MACRO
// Restore register and jump to routine
// Inputs: EDI contains pointer to code.
// Notes: Need to pop EAX too (restores Method*)
MACRO0(RESTORE_SAVE_REFS_AND_ARGS_FRAME_AND_JUMP)
POP eax // Restore Method*
// Restore FPRs.
movsd 0(%esp), %xmm0
movsd 8(%esp), %xmm1
movsd 16(%esp), %xmm2
movsd 24(%esp), %xmm3
addl MACRO_LITERAL(32), %esp // Remove FPRs.
CFI_ADJUST_CFA_OFFSET(-32)
POP ecx // Restore args except eax
POP edx
POP ebx
POP ebp // Restore callee saves
POP esi
xchgl 0(%esp),%edi // restore EDI and place code pointer as only value on stack
ret
END_MACRO
/*
* Macro that sets up the callee save frame to conform with
* Runtime::CreateCalleeSaveMethod(kSaveEverything)
* when EDI and ESI are already saved.
*/
MACRO2(SETUP_SAVE_EVERYTHING_FRAME_EDI_ESI_SAVED, temp_reg, runtime_method_offset = RUNTIME_SAVE_EVERYTHING_METHOD_OFFSET)
// Save core registers from highest to lowest to agree with core spills bitmap.
// EDI and ESI, or at least placeholders for them, are already on the stack.
PUSH ebp
PUSH ebx
PUSH edx
PUSH ecx
PUSH eax
// Create space for FPR registers and stack alignment padding.
subl MACRO_LITERAL(12 + 8 * 8), %esp
CFI_ADJUST_CFA_OFFSET(12 + 8 * 8)
// Save FPRs.
movsd %xmm0, 12(%esp)
movsd %xmm1, 20(%esp)
movsd %xmm2, 28(%esp)
movsd %xmm3, 36(%esp)
movsd %xmm4, 44(%esp)
movsd %xmm5, 52(%esp)
movsd %xmm6, 60(%esp)
movsd %xmm7, 68(%esp)
LOAD_RUNTIME_INSTANCE \temp_reg
// Push save everything callee-save method.
pushl \runtime_method_offset(REG_VAR(temp_reg))
CFI_ADJUST_CFA_OFFSET(4)
// Store esp as the stop quick frame.
movl %esp, %fs:THREAD_TOP_QUICK_FRAME_OFFSET
// Ugly compile-time check, but we only have the preprocessor.
// Last +4: implicit return address pushed on stack when caller made call.
#if (FRAME_SIZE_SAVE_EVERYTHING != 7*4 + 8*8 + 12 + 4 + 4)
#error "FRAME_SIZE_SAVE_EVERYTHING(X86) size not as expected."
#endif
END_MACRO
/*
* Macro that sets up the callee save frame to conform with
* Runtime::CreateCalleeSaveMethod(kSaveEverything)
* when EDI is already saved.
*/
MACRO2(SETUP_SAVE_EVERYTHING_FRAME_EDI_SAVED, temp_reg, runtime_method_offset = RUNTIME_SAVE_EVERYTHING_METHOD_OFFSET)
// Save core registers from highest to lowest to agree with core spills bitmap.
// EDI, or at least a placeholder for it, is already on the stack.
PUSH esi
SETUP_SAVE_EVERYTHING_FRAME_EDI_ESI_SAVED RAW_VAR(temp_reg), \runtime_method_offset
END_MACRO
/*
* Macro that sets up the callee save frame to conform with
* Runtime::CreateCalleeSaveMethod(kSaveEverything)
*/
MACRO2(SETUP_SAVE_EVERYTHING_FRAME, temp_reg, runtime_method_offset = RUNTIME_SAVE_EVERYTHING_METHOD_OFFSET)
PUSH edi
SETUP_SAVE_EVERYTHING_FRAME_EDI_SAVED RAW_VAR(temp_reg), \runtime_method_offset
END_MACRO
MACRO0(RESTORE_SAVE_EVERYTHING_FRAME_FRPS)
// Restore FPRs. Method and padding is still on the stack.
movsd 16(%esp), %xmm0
movsd 24(%esp), %xmm1
movsd 32(%esp), %xmm2
movsd 40(%esp), %xmm3
movsd 48(%esp), %xmm4
movsd 56(%esp), %xmm5
movsd 64(%esp), %xmm6
movsd 72(%esp), %xmm7
END_MACRO
MACRO0(RESTORE_SAVE_EVERYTHING_FRAME_GPRS_EXCEPT_EAX)
// Restore core registers (except eax).
POP ecx
POP edx
POP ebx
POP ebp
POP esi
POP edi
END_MACRO
MACRO0(RESTORE_SAVE_EVERYTHING_FRAME)
RESTORE_SAVE_EVERYTHING_FRAME_FRPS
// Remove save everything callee save method, stack alignment padding and FPRs.
addl MACRO_LITERAL(16 + 8 * 8), %esp
CFI_ADJUST_CFA_OFFSET(-(16 + 8 * 8))
POP eax
RESTORE_SAVE_EVERYTHING_FRAME_GPRS_EXCEPT_EAX
END_MACRO
MACRO0(RESTORE_SAVE_EVERYTHING_FRAME_KEEP_EAX)
RESTORE_SAVE_EVERYTHING_FRAME_FRPS
// Remove save everything callee save method, stack alignment padding and FPRs, skip EAX.
addl MACRO_LITERAL(16 + 8 * 8 + 4), %esp
CFI_ADJUST_CFA_OFFSET(-(16 + 8 * 8 + 4))
RESTORE_SAVE_EVERYTHING_FRAME_GPRS_EXCEPT_EAX
END_MACRO
MACRO2(NO_ARG_RUNTIME_EXCEPTION, c_name, cxx_name)
DEFINE_FUNCTION VAR(c_name)
SETUP_SAVE_ALL_CALLEE_SAVES_FRAME ebx // save all registers as basis for long jump context
// Outgoing argument set up
subl MACRO_LITERAL(12), %esp // alignment padding
CFI_ADJUST_CFA_OFFSET(12)
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
call CALLVAR(cxx_name) // cxx_name(Thread*)
UNREACHABLE
END_FUNCTION VAR(c_name)
END_MACRO
MACRO2(NO_ARG_RUNTIME_EXCEPTION_SAVE_EVERYTHING, c_name, cxx_name)
DEFINE_FUNCTION VAR(c_name)
SETUP_SAVE_EVERYTHING_FRAME ebx // save all registers as basis for long jump context
// Outgoing argument set up
subl MACRO_LITERAL(12), %esp // alignment padding
CFI_ADJUST_CFA_OFFSET(12)
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
call CALLVAR(cxx_name) // cxx_name(Thread*)
UNREACHABLE
END_FUNCTION VAR(c_name)
END_MACRO
MACRO2(ONE_ARG_RUNTIME_EXCEPTION, c_name, cxx_name)
DEFINE_FUNCTION VAR(c_name)
SETUP_SAVE_ALL_CALLEE_SAVES_FRAME ebx // save all registers as basis for long jump context
// Outgoing argument set up
subl MACRO_LITERAL(8), %esp // alignment padding
CFI_ADJUST_CFA_OFFSET(8)
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
PUSH eax // pass arg1
call CALLVAR(cxx_name) // cxx_name(arg1, Thread*)
UNREACHABLE
END_FUNCTION VAR(c_name)
END_MACRO
MACRO2(TWO_ARG_RUNTIME_EXCEPTION_SAVE_EVERYTHING, c_name, cxx_name)
DEFINE_FUNCTION VAR(c_name)
SETUP_SAVE_EVERYTHING_FRAME ebx // save all registers as basis for long jump context
// Outgoing argument set up
PUSH eax // alignment padding
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
PUSH ecx // pass arg2
PUSH eax // pass arg1
call CALLVAR(cxx_name) // cxx_name(arg1, arg2, Thread*)
UNREACHABLE
END_FUNCTION VAR(c_name)
END_MACRO
/*
* Called by managed code to create and deliver a NullPointerException.
*/
NO_ARG_RUNTIME_EXCEPTION_SAVE_EVERYTHING art_quick_throw_null_pointer_exception, artThrowNullPointerExceptionFromCode
/*
* Call installed by a signal handler to create and deliver a NullPointerException.
*/
DEFINE_FUNCTION_CUSTOM_CFA art_quick_throw_null_pointer_exception_from_signal, 2 * __SIZEOF_POINTER__
// Fault address and return address were saved by the fault handler.
// Save all registers as basis for long jump context; EDI will replace fault address later.
SETUP_SAVE_EVERYTHING_FRAME_EDI_SAVED ebx
// Retrieve fault address and save EDI.
movl (FRAME_SIZE_SAVE_EVERYTHING - 2 * __SIZEOF_POINTER__)(%esp), %eax
movl %edi, (FRAME_SIZE_SAVE_EVERYTHING - 2 * __SIZEOF_POINTER__)(%esp)
CFI_REL_OFFSET(%edi, (FRAME_SIZE_SAVE_EVERYTHING - 2 * __SIZEOF_POINTER__))
// Outgoing argument set up
subl MACRO_LITERAL(8), %esp // alignment padding
CFI_ADJUST_CFA_OFFSET(8)
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
PUSH eax // pass arg1
call SYMBOL(artThrowNullPointerExceptionFromSignal) // (addr, self)
UNREACHABLE
END_FUNCTION art_quick_throw_null_pointer_exception_from_signal
/*
* Called by managed code to create and deliver an ArithmeticException.
*/
NO_ARG_RUNTIME_EXCEPTION_SAVE_EVERYTHING art_quick_throw_div_zero, artThrowDivZeroFromCode
/*
* Called by managed code to create and deliver a StackOverflowError.
*/
NO_ARG_RUNTIME_EXCEPTION art_quick_throw_stack_overflow, artThrowStackOverflowFromCode
/*
* Called by managed code, saves callee saves and then calls artThrowException
* that will place a mock Method* at the bottom of the stack. Arg1 holds the exception.
*/
ONE_ARG_RUNTIME_EXCEPTION art_quick_deliver_exception, artDeliverExceptionFromCode
/*
* Called by managed code to create and deliver an ArrayIndexOutOfBoundsException. Arg1 holds
* index, arg2 holds limit.
*/
TWO_ARG_RUNTIME_EXCEPTION_SAVE_EVERYTHING art_quick_throw_array_bounds, artThrowArrayBoundsFromCode
/*
* Called by managed code to create and deliver a StringIndexOutOfBoundsException
* as if thrown from a call to String.charAt(). Arg1 holds index, arg2 holds limit.
*/
TWO_ARG_RUNTIME_EXCEPTION_SAVE_EVERYTHING art_quick_throw_string_bounds, artThrowStringBoundsFromCode
/*
* All generated callsites for interface invokes and invocation slow paths will load arguments
* as usual - except instead of loading arg0/r0 with the target Method*, arg0/r0 will contain
* the method_idx. This wrapper will save arg1-arg3 and call the appropriate C helper.
* NOTE: "this" is first visible argument of the target, and so can be found in arg1/r1.
*
* The helper will attempt to locate the target and return a 64-bit result in r0/r1 consisting
* of the target Method* in r0 and method->code_ in r1.
*
* If unsuccessful, the helper will return null/null and there will be a pending exception in the
* thread and we branch to another stub to deliver it.
*
* On success this wrapper will restore arguments and *jump* to the target, leaving the lr
* pointing back to the original caller.
*/
MACRO1(INVOKE_TRAMPOLINE_BODY, cxx_name)
SETUP_SAVE_REFS_AND_ARGS_FRAME ebx
movl %esp, %edx // remember SP
// Outgoing argument set up
PUSH edx // pass SP
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
PUSH ecx // pass arg2
PUSH eax // pass arg1
call CALLVAR(cxx_name) // cxx_name(arg1, arg2, Thread*, SP)
movl %edx, %edi // save code pointer in EDI
addl MACRO_LITERAL(20), %esp // Pop arguments skip eax
CFI_ADJUST_CFA_OFFSET(-20)
// Restore FPRs.
movsd 0(%esp), %xmm0
movsd 8(%esp), %xmm1
movsd 16(%esp), %xmm2
movsd 24(%esp), %xmm3
// Remove space for FPR args.
addl MACRO_LITERAL(4 * 8), %esp
CFI_ADJUST_CFA_OFFSET(-4 * 8)
POP ecx // Restore args except eax
POP edx
POP ebx
POP ebp // Restore callee saves
POP esi
// Swap EDI callee save with code pointer.
xchgl %edi, (%esp)
testl %eax, %eax // Branch forward if exception pending.
jz 1f
// Tail call to intended method.
ret
1:
addl MACRO_LITERAL(4), %esp // Pop code pointer off stack
CFI_ADJUST_CFA_OFFSET(-4)
DELIVER_PENDING_EXCEPTION
END_MACRO
MACRO2(INVOKE_TRAMPOLINE, c_name, cxx_name)
DEFINE_FUNCTION VAR(c_name)
INVOKE_TRAMPOLINE_BODY RAW_VAR(cxx_name)
END_FUNCTION VAR(c_name)
END_MACRO
INVOKE_TRAMPOLINE art_quick_invoke_interface_trampoline_with_access_check, artInvokeInterfaceTrampolineWithAccessCheck
INVOKE_TRAMPOLINE art_quick_invoke_static_trampoline_with_access_check, artInvokeStaticTrampolineWithAccessCheck
INVOKE_TRAMPOLINE art_quick_invoke_direct_trampoline_with_access_check, artInvokeDirectTrampolineWithAccessCheck
INVOKE_TRAMPOLINE art_quick_invoke_super_trampoline_with_access_check, artInvokeSuperTrampolineWithAccessCheck
INVOKE_TRAMPOLINE art_quick_invoke_virtual_trampoline_with_access_check, artInvokeVirtualTrampolineWithAccessCheck
/*
* Helper for quick invocation stub to set up XMM registers.
* Increments shorty and arg_array and clobbers temp_char.
* Branches to finished if it encounters the end of the shorty.
*/
MACRO5(LOOP_OVER_SHORTY_LOADING_XMMS, xmm_reg, shorty, arg_array, temp_char, finished)
1: // LOOP
movb (REG_VAR(shorty)), REG_VAR(temp_char) // temp_char := *shorty
addl MACRO_LITERAL(1), REG_VAR(shorty) // shorty++
cmpb MACRO_LITERAL(0), REG_VAR(temp_char) // if (temp_char == '\0')
je VAR(finished) // goto finished
cmpb MACRO_LITERAL(68), REG_VAR(temp_char) // if (temp_char == 'D')
je 2f // goto FOUND_DOUBLE
cmpb MACRO_LITERAL(70), REG_VAR(temp_char) // if (temp_char == 'F')
je 3f // goto FOUND_FLOAT
addl MACRO_LITERAL(4), REG_VAR(arg_array) // arg_array++
// Handle extra space in arg array taken by a long.
cmpb MACRO_LITERAL(74), REG_VAR(temp_char) // if (temp_char != 'J')
jne 1b // goto LOOP
addl MACRO_LITERAL(4), REG_VAR(arg_array) // arg_array++
jmp 1b // goto LOOP
2: // FOUND_DOUBLE
movsd (REG_VAR(arg_array)), REG_VAR(xmm_reg)
addl MACRO_LITERAL(8), REG_VAR(arg_array) // arg_array+=2
jmp 4f
3: // FOUND_FLOAT
movss (REG_VAR(arg_array)), REG_VAR(xmm_reg)
addl MACRO_LITERAL(4), REG_VAR(arg_array) // arg_array++
4:
END_MACRO
/*
* Helper for quick invocation stub to set up GPR registers.
* Increments shorty and arg_array, and returns the current short character in
* temp_char. Branches to finished if it encounters the end of the shorty.
*/
MACRO4(SKIP_OVER_FLOATS, shorty, arg_array, temp_char, finished)
1: // LOOP:
movb (REG_VAR(shorty)), REG_VAR(temp_char) // temp_char := *shorty
addl MACRO_LITERAL(1), REG_VAR(shorty) // shorty++
cmpb MACRO_LITERAL(0), REG_VAR(temp_char) // if (temp_char == '\0')
je VAR(finished) // goto finished
cmpb MACRO_LITERAL(70), REG_VAR(temp_char) // if (temp_char == 'F')
je 3f // goto SKIP_FLOAT
cmpb MACRO_LITERAL(68), REG_VAR(temp_char) // if (temp_char == 'D')
je 4f // goto SKIP_DOUBLE
jmp 5f // goto end
3: // SKIP_FLOAT
addl MACRO_LITERAL(4), REG_VAR(arg_array) // arg_array++
jmp 1b // goto LOOP
4: // SKIP_DOUBLE
addl MACRO_LITERAL(8), REG_VAR(arg_array) // arg_array+=2
jmp 1b // goto LOOP
5:
END_MACRO
/*
* Quick invocation stub (non-static).
* On entry:
* [sp] = return address
* [sp + 4] = method pointer
* [sp + 8] = argument array or null for no argument methods
* [sp + 12] = size of argument array in bytes
* [sp + 16] = (managed) thread pointer
* [sp + 20] = JValue* result
* [sp + 24] = shorty
*/
DEFINE_FUNCTION art_quick_invoke_stub
// Save the non-volatiles.
PUSH ebp // save ebp
PUSH ebx // save ebx
PUSH esi // save esi
PUSH edi // save edi
// Set up argument XMM registers.
mov 24+16(%esp), %esi // ESI := shorty + 1 ; ie skip return arg character.
addl LITERAL(1), %esi
mov 8+16(%esp), %edi // EDI := arg_array + 4 ; ie skip this pointer.
addl LITERAL(4), %edi
// Clobbers ESI, EDI, EAX.
LOOP_OVER_SHORTY_LOADING_XMMS xmm0, esi, edi, al, .Lxmm_setup_finished
LOOP_OVER_SHORTY_LOADING_XMMS xmm1, esi, edi, al, .Lxmm_setup_finished
LOOP_OVER_SHORTY_LOADING_XMMS xmm2, esi, edi, al, .Lxmm_setup_finished
LOOP_OVER_SHORTY_LOADING_XMMS xmm3, esi, edi, al, .Lxmm_setup_finished
.balign 16
.Lxmm_setup_finished:
mov %esp, %ebp // copy value of stack pointer into base pointer
CFI_DEF_CFA_REGISTER(ebp)
mov 28(%ebp), %ebx // get arg array size
// reserve space for return addr, method*, ebx, ebp, esi, and edi in frame
addl LITERAL(36), %ebx
// align frame size to 16 bytes
andl LITERAL(0xFFFFFFF0), %ebx
subl LITERAL(20), %ebx // remove space for return address, ebx, ebp, esi and edi
subl %ebx, %esp // reserve stack space for argument array
movl LITERAL(0), (%esp) // store null for method*
// Copy arg array into stack.
movl 28(%ebp), %ecx // ECX = size of args
movl 24(%ebp), %esi // ESI = argument array
leal 4(%esp), %edi // EDI = just after Method* in stack arguments
rep movsb // while (ecx--) { *edi++ = *esi++ }
mov 40(%ebp), %esi // ESI := shorty + 1 ; ie skip return arg character.
addl LITERAL(1), %esi
mov 24(%ebp), %edi // EDI := arg_array
mov 0(%edi), %ecx // ECX := this pointer
addl LITERAL(4), %edi // EDI := arg_array + 4 ; ie skip this pointer.
// Enumerate the possible cases for loading GPRS.
// edx (and maybe ebx):
SKIP_OVER_FLOATS esi, edi, al, .Lgpr_setup_finished
cmpb LITERAL(74), %al // if (al == 'J') goto FOUND_LONG
je .LfirstLong
// Must be an integer value.
movl (%edi), %edx
addl LITERAL(4), %edi // arg_array++
// Now check ebx
SKIP_OVER_FLOATS esi, edi, al, .Lgpr_setup_finished
// Must be first word of a long, or an integer. First word of long doesn't
// go into EBX, but can be loaded there anyways, as it is harmless.
movl (%edi), %ebx
jmp .Lgpr_setup_finished
.LfirstLong:
movl (%edi), %edx
movl 4(%edi), %ebx
// Nothing left to load.
.Lgpr_setup_finished:
mov 20(%ebp), %eax // move method pointer into eax
call *ART_METHOD_QUICK_CODE_OFFSET_32(%eax) // call the method
mov %ebp, %esp // restore stack pointer
CFI_DEF_CFA_REGISTER(esp)
POP edi // pop edi
POP esi // pop esi
POP ebx // pop ebx
POP ebp // pop ebp
mov 20(%esp), %ecx // get result pointer
mov %eax, (%ecx) // store the result assuming its a long, int or Object*
mov %edx, 4(%ecx) // store the other half of the result
mov 24(%esp), %edx // get the shorty
cmpb LITERAL(68), (%edx) // test if result type char == 'D'
je .Lreturn_double_quick
cmpb LITERAL(70), (%edx) // test if result type char == 'F'
je .Lreturn_float_quick
ret
.Lreturn_double_quick:
movsd %xmm0, (%ecx) // store the floating point result
ret
.Lreturn_float_quick:
movss %xmm0, (%ecx) // store the floating point result
ret
END_FUNCTION art_quick_invoke_stub
/*
* Quick invocation stub (static).
* On entry:
* [sp] = return address
* [sp + 4] = method pointer
* [sp + 8] = argument array or null for no argument methods
* [sp + 12] = size of argument array in bytes
* [sp + 16] = (managed) thread pointer
* [sp + 20] = JValue* result
* [sp + 24] = shorty
*/
DEFINE_FUNCTION art_quick_invoke_static_stub
// Save the non-volatiles.
PUSH ebp // save ebp
PUSH ebx // save ebx
PUSH esi // save esi
PUSH edi // save edi
// Set up argument XMM registers.
mov 24+16(%esp), %esi // ESI := shorty + 1 ; ie skip return arg character.
addl LITERAL(1), %esi
mov 8+16(%esp), %edi // EDI := arg_array
// Clobbers ESI, EDI, EAX.
LOOP_OVER_SHORTY_LOADING_XMMS xmm0, esi, edi, al, .Lxmm_setup_finished2
LOOP_OVER_SHORTY_LOADING_XMMS xmm1, esi, edi, al, .Lxmm_setup_finished2
LOOP_OVER_SHORTY_LOADING_XMMS xmm2, esi, edi, al, .Lxmm_setup_finished2
LOOP_OVER_SHORTY_LOADING_XMMS xmm3, esi, edi, al, .Lxmm_setup_finished2
.balign 16
.Lxmm_setup_finished2:
mov %esp, %ebp // copy value of stack pointer into base pointer
CFI_DEF_CFA_REGISTER(ebp)
mov 28(%ebp), %ebx // get arg array size
// reserve space for return addr, method*, ebx, ebp, esi, and edi in frame
addl LITERAL(36), %ebx
// align frame size to 16 bytes
andl LITERAL(0xFFFFFFF0), %ebx
subl LITERAL(20), %ebx // remove space for return address, ebx, ebp, esi and edi
subl %ebx, %esp // reserve stack space for argument array
movl LITERAL(0), (%esp) // store null for method*
// Copy arg array into stack.
movl 28(%ebp), %ecx // ECX = size of args
movl 24(%ebp), %esi // ESI = argument array
leal 4(%esp), %edi // EDI = just after Method* in stack arguments
rep movsb // while (ecx--) { *edi++ = *esi++ }
mov 40(%ebp), %esi // ESI := shorty + 1 ; ie skip return arg character.
addl LITERAL(1), %esi
mov 24(%ebp), %edi // EDI := arg_array
// Enumerate the possible cases for loading GPRS.
// ecx (and maybe edx)
SKIP_OVER_FLOATS esi, edi, al, .Lgpr_setup_finished2
cmpb LITERAL(74), %al // if (al == 'J') goto FOUND_LONG
je .LfirstLong2
// Must be an integer value. Load into ECX.
movl (%edi), %ecx
addl LITERAL(4), %edi // arg_array++
// Now check edx (and maybe ebx).
SKIP_OVER_FLOATS esi, edi, al, .Lgpr_setup_finished2
cmpb LITERAL(74), %al // if (al == 'J') goto FOUND_LONG
je .LSecondLong2
// Must be an integer. Load into EDX.
movl (%edi), %edx
addl LITERAL(4), %edi // arg_array++
// Is there anything for ebx?
SKIP_OVER_FLOATS esi, edi, al, .Lgpr_setup_finished2
// Must be first word of a long, or an integer. First word of long doesn't
// go into EBX, but can be loaded there anyways, as it is harmless.
movl (%edi), %ebx
jmp .Lgpr_setup_finished2
.LSecondLong2:
// EDX:EBX is long. That is all.
movl (%edi), %edx
movl 4(%edi), %ebx
jmp .Lgpr_setup_finished2
.LfirstLong2:
// ECX:EDX is a long
movl (%edi), %ecx
movl 4(%edi), %edx
addl LITERAL(8), %edi // arg_array += 2
// Anything for EBX?
SKIP_OVER_FLOATS esi, edi, al, .Lgpr_setup_finished2
// Must be first word of a long, or an integer. First word of long doesn't
// go into EBX, but can be loaded there anyways, as it is harmless.
movl (%edi), %ebx
jmp .Lgpr_setup_finished2
// Nothing left to load.
.Lgpr_setup_finished2:
mov 20(%ebp), %eax // move method pointer into eax
call *ART_METHOD_QUICK_CODE_OFFSET_32(%eax) // call the method
mov %ebp, %esp // restore stack pointer
CFI_DEF_CFA_REGISTER(esp)
POP edi // pop edi
POP esi // pop esi
POP ebx // pop ebx
POP ebp // pop ebp
mov 20(%esp), %ecx // get result pointer
mov %eax, (%ecx) // store the result assuming its a long, int or Object*
mov %edx, 4(%ecx) // store the other half of the result
mov 24(%esp), %edx // get the shorty
cmpb LITERAL(68), (%edx) // test if result type char == 'D'
je .Lreturn_double_quick2
cmpb LITERAL(70), (%edx) // test if result type char == 'F'
je .Lreturn_float_quick2
ret
.Lreturn_double_quick2:
movsd %xmm0, (%ecx) // store the floating point result
ret
.Lreturn_float_quick2:
movss %xmm0, (%ecx) // store the floating point result
ret
END_FUNCTION art_quick_invoke_static_stub
MACRO3(ONE_ARG_DOWNCALL, c_name, cxx_name, return_macro)
DEFINE_FUNCTION VAR(c_name)
SETUP_SAVE_REFS_ONLY_FRAME ebx // save ref containing registers for GC
// Outgoing argument set up
subl MACRO_LITERAL(8), %esp // push padding
CFI_ADJUST_CFA_OFFSET(8)
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
PUSH eax // pass arg1
call CALLVAR(cxx_name) // cxx_name(arg1, Thread*)
addl MACRO_LITERAL(16), %esp // pop arguments
CFI_ADJUST_CFA_OFFSET(-16)
RESTORE_SAVE_REFS_ONLY_FRAME // restore frame up to return address
CALL_MACRO(return_macro) // return or deliver exception
END_FUNCTION VAR(c_name)
END_MACRO
MACRO3(TWO_ARG_DOWNCALL, c_name, cxx_name, return_macro)
DEFINE_FUNCTION VAR(c_name)
SETUP_SAVE_REFS_ONLY_FRAME ebx // save ref containing registers for GC
// Outgoing argument set up
PUSH eax // push padding
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
PUSH ecx // pass arg2
PUSH eax // pass arg1
call CALLVAR(cxx_name) // cxx_name(arg1, arg2, Thread*)
addl MACRO_LITERAL(16), %esp // pop arguments
CFI_ADJUST_CFA_OFFSET(-16)
RESTORE_SAVE_REFS_ONLY_FRAME // restore frame up to return address
CALL_MACRO(return_macro) // return or deliver exception
END_FUNCTION VAR(c_name)
END_MACRO
MACRO3(THREE_ARG_DOWNCALL, c_name, cxx_name, return_macro)
DEFINE_FUNCTION VAR(c_name)
SETUP_SAVE_REFS_ONLY_FRAME ebx // save ref containing registers for GC
// Outgoing argument set up
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
PUSH edx // pass arg3
PUSH ecx // pass arg2
PUSH eax // pass arg1
call CALLVAR(cxx_name) // cxx_name(arg1, arg2, arg3, Thread*)
addl MACRO_LITERAL(16), %esp // pop arguments
CFI_ADJUST_CFA_OFFSET(-16)
RESTORE_SAVE_REFS_ONLY_FRAME // restore frame up to return address
CALL_MACRO(return_macro) // return or deliver exception
END_FUNCTION VAR(c_name)
END_MACRO
MACRO3(FOUR_ARG_DOWNCALL, c_name, cxx_name, return_macro)
DEFINE_FUNCTION VAR(c_name)
SETUP_SAVE_REFS_ONLY_FRAME_PRESERVE_TEMP_REG ebx // save ref containing registers for GC
// Outgoing argument set up
subl MACRO_LITERAL(12), %esp // alignment padding
CFI_ADJUST_CFA_OFFSET(12)
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
PUSH ebx // pass arg4
PUSH edx // pass arg3
PUSH ecx // pass arg2
PUSH eax // pass arg1
call CALLVAR(cxx_name) // cxx_name(arg1, arg2, arg3, arg4, Thread*)
addl MACRO_LITERAL(32), %esp // pop arguments
CFI_ADJUST_CFA_OFFSET(-32)
RESTORE_SAVE_REFS_ONLY_FRAME // restore frame up to return address
CALL_MACRO(return_macro) // return or deliver exception
END_FUNCTION VAR(c_name)
END_MACRO
MACRO3(ONE_ARG_REF_DOWNCALL, c_name, cxx_name, return_macro)
DEFINE_FUNCTION VAR(c_name)
SETUP_SAVE_REFS_ONLY_FRAME ebx // save ref containing registers for GC
// Outgoing argument set up
subl MACRO_LITERAL(8), %esp // alignment padding
CFI_ADJUST_CFA_OFFSET(8)
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
PUSH eax // pass arg1
call CALLVAR(cxx_name) // cxx_name(arg1, Thread*)
addl MACRO_LITERAL(16), %esp // pop arguments
CFI_ADJUST_CFA_OFFSET(-16)
RESTORE_SAVE_REFS_ONLY_FRAME // restore frame up to return address
CALL_MACRO(return_macro) // return or deliver exception
END_FUNCTION VAR(c_name)
END_MACRO
MACRO3(TWO_ARG_REF_DOWNCALL, c_name, cxx_name, return_macro)
DEFINE_FUNCTION VAR(c_name)
SETUP_SAVE_REFS_ONLY_FRAME ebx // save ref containing registers for GC
// Outgoing argument set up
PUSH eax // alignment padding
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
PUSH ecx // pass arg2
PUSH eax // pass arg1
call CALLVAR(cxx_name) // cxx_name(arg1, arg2, referrer, Thread*)
addl MACRO_LITERAL(16), %esp // pop arguments
CFI_ADJUST_CFA_OFFSET(-16)
RESTORE_SAVE_REFS_ONLY_FRAME // restore frame up to return address
CALL_MACRO(return_macro) // return or deliver exception
END_FUNCTION VAR(c_name)
END_MACRO
MACRO3(THREE_ARG_REF_DOWNCALL, c_name, cxx_name, return_macro)
DEFINE_FUNCTION VAR(c_name)
SETUP_SAVE_REFS_ONLY_FRAME ebx // save ref containing registers for GC
// Outgoing argument set up
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
PUSH edx // pass arg3
PUSH ecx // pass arg2
PUSH eax // pass arg1
call CALLVAR(cxx_name) // cxx_name(arg1, arg2, arg3, Thread*)
addl LITERAL(16), %esp // pop arguments
CFI_ADJUST_CFA_OFFSET(-32)
RESTORE_SAVE_REFS_ONLY_FRAME // restore frame up to return address
CALL_MACRO(return_macro) // return or deliver exception
END_FUNCTION VAR(c_name)
END_MACRO
/*
* Macro for resolution and initialization of indexed DEX file
* constants such as classes and strings.
*/
MACRO3(ONE_ARG_SAVE_EVERYTHING_DOWNCALL, c_name, cxx_name, runtime_method_offset = RUNTIME_SAVE_EVERYTHING_METHOD_OFFSET)
DEFINE_FUNCTION VAR(c_name)
SETUP_SAVE_EVERYTHING_FRAME ebx, \runtime_method_offset // save ref containing registers for GC
// Outgoing argument set up
subl MACRO_LITERAL(8), %esp // push padding
CFI_ADJUST_CFA_OFFSET(8)
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
PUSH eax // pass the index of the constant as arg1
call CALLVAR(cxx_name) // cxx_name(arg1, Thread*)
addl MACRO_LITERAL(16), %esp // pop arguments
CFI_ADJUST_CFA_OFFSET(-16)
testl %eax, %eax // If result is null, deliver the OOME.
jz 1f
CFI_REMEMBER_STATE
RESTORE_SAVE_EVERYTHING_FRAME_KEEP_EAX // restore frame up to return address
ret // return
CFI_RESTORE_STATE_AND_DEF_CFA esp, FRAME_SIZE_SAVE_EVERYTHING
1:
DELIVER_PENDING_EXCEPTION_FRAME_READY
END_FUNCTION VAR(c_name)
END_MACRO
MACRO2(ONE_ARG_SAVE_EVERYTHING_DOWNCALL_FOR_CLINIT, c_name, cxx_name)
ONE_ARG_SAVE_EVERYTHING_DOWNCALL \c_name, \cxx_name, RUNTIME_SAVE_EVERYTHING_FOR_CLINIT_METHOD_OFFSET
END_MACRO
MACRO0(RETURN_IF_RESULT_IS_NON_ZERO_OR_DELIVER)
testl %eax, %eax // eax == 0 ?
jz 1f // if eax == 0 goto 1
ret // return
1: // deliver exception on current thread
DELIVER_PENDING_EXCEPTION
END_MACRO
MACRO0(RETURN_IF_EAX_ZERO)
testl %eax, %eax // eax == 0 ?
jnz 1f // if eax != 0 goto 1
ret // return
1: // deliver exception on current thread
DELIVER_PENDING_EXCEPTION
END_MACRO
// Generate the allocation entrypoints for each allocator.
GENERATE_ALLOC_ENTRYPOINTS_FOR_NON_TLAB_ALLOCATORS
// Comment out allocators that have x86 specific asm.
// Region TLAB:
// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_OBJECT_RESOLVED(_region_tlab, RegionTLAB)
// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_OBJECT_INITIALIZED(_region_tlab, RegionTLAB)
GENERATE_ALLOC_ENTRYPOINTS_ALLOC_OBJECT_WITH_ACCESS_CHECK(_region_tlab, RegionTLAB)
GENERATE_ALLOC_ENTRYPOINTS_ALLOC_STRING_OBJECT(_region_tlab, RegionTLAB)
// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_ARRAY_RESOLVED(_region_tlab, RegionTLAB)
// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_ARRAY_RESOLVED8(_region_tlab, RegionTLAB)
// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_ARRAY_RESOLVED16(_region_tlab, RegionTLAB)
// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_ARRAY_RESOLVED32(_region_tlab, RegionTLAB)
// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_ARRAY_RESOLVED64(_region_tlab, RegionTLAB)
GENERATE_ALLOC_ENTRYPOINTS_ALLOC_STRING_FROM_BYTES(_region_tlab, RegionTLAB)
GENERATE_ALLOC_ENTRYPOINTS_ALLOC_STRING_FROM_CHARS(_region_tlab, RegionTLAB)
GENERATE_ALLOC_ENTRYPOINTS_ALLOC_STRING_FROM_STRING(_region_tlab, RegionTLAB)
// Normal TLAB:
// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_OBJECT_RESOLVED(_tlab, TLAB)
// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_OBJECT_INITIALIZED(_tlab, TLAB)
GENERATE_ALLOC_ENTRYPOINTS_ALLOC_OBJECT_WITH_ACCESS_CHECK(_tlab, TLAB)
GENERATE_ALLOC_ENTRYPOINTS_ALLOC_STRING_OBJECT(_tlab, TLAB)
// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_ARRAY_RESOLVED(_tlab, TLAB)
// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_ARRAY_RESOLVED8(_tlab, TLAB)
// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_ARRAY_RESOLVED16(_tlab, TLAB)
// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_ARRAY_RESOLVED32(_tlab, TLAB)
// GENERATE_ALLOC_ENTRYPOINTS_ALLOC_ARRAY_RESOLVED64(_tlab, TLAB)
GENERATE_ALLOC_ENTRYPOINTS_ALLOC_STRING_FROM_BYTES(_tlab, TLAB)
GENERATE_ALLOC_ENTRYPOINTS_ALLOC_STRING_FROM_CHARS(_tlab, TLAB)
GENERATE_ALLOC_ENTRYPOINTS_ALLOC_STRING_FROM_STRING(_tlab, TLAB)
// A hand-written override for GENERATE_ALLOC_ENTRYPOINTS_ALLOC_OBJECT_RESOLVED(_rosalloc, RosAlloc).
MACRO2(ART_QUICK_ALLOC_OBJECT_ROSALLOC, c_name, cxx_name)
DEFINE_FUNCTION VAR(c_name)
// Fast path rosalloc allocation.
// eax: type/return value
// ecx, ebx, edx: free
movl %fs:THREAD_SELF_OFFSET, %ebx // ebx = thread
// Check if the thread local allocation
// stack has room
movl THREAD_LOCAL_ALLOC_STACK_TOP_OFFSET(%ebx), %ecx
cmpl THREAD_LOCAL_ALLOC_STACK_END_OFFSET(%ebx), %ecx
jae .Lslow_path\c_name
movl MIRROR_CLASS_OBJECT_SIZE_ALLOC_FAST_PATH_OFFSET(%eax), %ecx // Load the object size (ecx)
// Check if the size is for a thread
// local allocation. Also does the
// finalizable and initialization check.
cmpl LITERAL(ROSALLOC_MAX_THREAD_LOCAL_BRACKET_SIZE), %ecx
ja .Lslow_path\c_name
shrl LITERAL(ROSALLOC_BRACKET_QUANTUM_SIZE_SHIFT), %ecx // Calculate the rosalloc bracket index
// from object size.
// Load thread local rosalloc run (ebx)
// Subtract __SIZEOF_POINTER__ to subtract
// one from edi as there is no 0 byte run
// and the size is already aligned.
movl (THREAD_ROSALLOC_RUNS_OFFSET - __SIZEOF_POINTER__)(%ebx, %ecx, __SIZEOF_POINTER__), %ebx
// Load free_list head (edi),
// this will be the return value.
movl (ROSALLOC_RUN_FREE_LIST_OFFSET + ROSALLOC_RUN_FREE_LIST_HEAD_OFFSET)(%ebx), %ecx
jecxz .Lslow_path\c_name
// Point of no slow path. Won't go to
// the slow path from here on.
// Load the next pointer of the head
// and update head of free list with
// next pointer
movl ROSALLOC_SLOT_NEXT_OFFSET(%ecx), %edx
movl %edx, (ROSALLOC_RUN_FREE_LIST_OFFSET + ROSALLOC_RUN_FREE_LIST_HEAD_OFFSET)(%ebx)
// Decrement size of free list by 1
decl (ROSALLOC_RUN_FREE_LIST_OFFSET + ROSALLOC_RUN_FREE_LIST_SIZE_OFFSET)(%ebx)
// Store the class pointer in the
// header. This also overwrites the
// next pointer. The offsets are
// asserted to match.
#if ROSALLOC_SLOT_NEXT_OFFSET != MIRROR_OBJECT_CLASS_OFFSET
#error "Class pointer needs to overwrite next pointer."
#endif
POISON_HEAP_REF eax
movl %eax, MIRROR_OBJECT_CLASS_OFFSET(%ecx)
movl %fs:THREAD_SELF_OFFSET, %ebx // ebx = thread
// Push the new object onto the thread
// local allocation stack and
// increment the thread local
// allocation stack top.
movl THREAD_LOCAL_ALLOC_STACK_TOP_OFFSET(%ebx), %eax
movl %ecx, (%eax)
addl LITERAL(COMPRESSED_REFERENCE_SIZE), %eax
movl %eax, THREAD_LOCAL_ALLOC_STACK_TOP_OFFSET(%ebx)
// No fence needed for x86.
movl %ecx, %eax // Move object to return register
ret
.Lslow_path\c_name:
SETUP_SAVE_REFS_ONLY_FRAME ebx // save ref containing registers for GC
// Outgoing argument set up
subl LITERAL(8), %esp // alignment padding
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
PUSH eax
call SYMBOL(artAllocObjectFromCodeResolvedRosAlloc) // cxx_name(arg0, Thread*)
addl LITERAL(16), %esp // pop arguments
CFI_ADJUST_CFA_OFFSET(-16)
RESTORE_SAVE_REFS_ONLY_FRAME // restore frame up to return address
RETURN_IF_RESULT_IS_NON_ZERO_OR_DELIVER // return or deliver exception
END_FUNCTION VAR(c_name)
END_MACRO
ART_QUICK_ALLOC_OBJECT_ROSALLOC art_quick_alloc_object_resolved_rosalloc, artAllocObjectFromCodeResolvedRosAlloc
ART_QUICK_ALLOC_OBJECT_ROSALLOC art_quick_alloc_object_initialized_rosalloc, artAllocObjectFromCodeInitializedRosAlloc
// The common fast path code for art_quick_alloc_object_resolved/initialized_tlab
// and art_quick_alloc_object_resolved/initialized_region_tlab.
//
// EAX: type/return_value
MACRO1(ALLOC_OBJECT_RESOLVED_TLAB_FAST_PATH, slowPathLabel)
movl %fs:THREAD_SELF_OFFSET, %ebx // ebx = thread
movl THREAD_LOCAL_END_OFFSET(%ebx), %edi // Load thread_local_end.
subl THREAD_LOCAL_POS_OFFSET(%ebx), %edi // Compute the remaining buffer size.
movl MIRROR_CLASS_OBJECT_SIZE_ALLOC_FAST_PATH_OFFSET(%eax), %ecx // Load the object size.
cmpl %edi, %ecx // Check if it fits.
ja VAR(slowPathLabel)
movl THREAD_LOCAL_POS_OFFSET(%ebx), %edx // Load thread_local_pos
// as allocated object.
addl %edx, %ecx // Add the object size.
movl %ecx, THREAD_LOCAL_POS_OFFSET(%ebx) // Update thread_local_pos.
incl THREAD_LOCAL_OBJECTS_OFFSET(%ebx) // Increase thread_local_objects.
// Store the class pointer in the header.
// No fence needed for x86.
POISON_HEAP_REF eax
movl %eax, MIRROR_OBJECT_CLASS_OFFSET(%edx)
movl %edx, %eax
POP edi
ret // Fast path succeeded.
END_MACRO
// The common slow path code for art_quick_alloc_object_resolved/initialized_tlab
// and art_quick_alloc_object_resolved/initialized_region_tlab.
MACRO1(ALLOC_OBJECT_RESOLVED_TLAB_SLOW_PATH, cxx_name)
POP edi
SETUP_SAVE_REFS_ONLY_FRAME ebx // save ref containing registers for GC
// Outgoing argument set up
subl LITERAL(8), %esp // alignment padding
CFI_ADJUST_CFA_OFFSET(8)
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
PUSH eax
call CALLVAR(cxx_name) // cxx_name(arg0, Thread*)
addl LITERAL(16), %esp
CFI_ADJUST_CFA_OFFSET(-16)
RESTORE_SAVE_REFS_ONLY_FRAME // restore frame up to return address
RETURN_IF_RESULT_IS_NON_ZERO_OR_DELIVER // return or deliver exception
END_MACRO
MACRO2(ART_QUICK_ALLOC_OBJECT_TLAB, c_name, cxx_name)
DEFINE_FUNCTION VAR(c_name)
// Fast path tlab allocation.
// EAX: type
// EBX, ECX, EDX: free.
PUSH edi
ALLOC_OBJECT_RESOLVED_TLAB_FAST_PATH .Lslow_path\c_name
.Lslow_path\c_name:
ALLOC_OBJECT_RESOLVED_TLAB_SLOW_PATH RAW_VAR(cxx_name)
END_FUNCTION VAR(c_name)
END_MACRO
ART_QUICK_ALLOC_OBJECT_TLAB art_quick_alloc_object_resolved_tlab, artAllocObjectFromCodeResolvedTLAB
ART_QUICK_ALLOC_OBJECT_TLAB art_quick_alloc_object_initialized_tlab, artAllocObjectFromCodeInitializedTLAB
ART_QUICK_ALLOC_OBJECT_TLAB art_quick_alloc_object_resolved_region_tlab, artAllocObjectFromCodeResolvedRegionTLAB
ART_QUICK_ALLOC_OBJECT_TLAB art_quick_alloc_object_initialized_region_tlab, artAllocObjectFromCodeInitializedRegionTLAB
// The fast path code for art_quick_alloc_array_region_tlab.
// Inputs: EAX: the class, ECX: int32_t component_count, EDX: total_size
// Free temp: EBX
// Output: EAX: return value.
MACRO1(ALLOC_ARRAY_TLAB_FAST_PATH_RESOLVED_WITH_SIZE, slowPathLabel)
mov %fs:THREAD_SELF_OFFSET, %ebx // ebx = thread
// Mask out the unaligned part to make sure we are 8 byte aligned.
andl LITERAL(OBJECT_ALIGNMENT_MASK_TOGGLED), %edx
movl THREAD_LOCAL_END_OFFSET(%ebx), %edi
subl THREAD_LOCAL_POS_OFFSET(%ebx), %edi
cmpl %edi, %edx // Check if it fits.
ja RAW_VAR(slowPathLabel)
movl THREAD_LOCAL_POS_OFFSET(%ebx), %edi
addl %edi, %edx // Add the object size.
movl %edx, THREAD_LOCAL_POS_OFFSET(%ebx) // Update thread_local_pos_
addl LITERAL(1), THREAD_LOCAL_OBJECTS_OFFSET(%ebx) // Increase thread_local_objects.
// Store the class pointer in the
// header.
// No fence needed for x86.
POISON_HEAP_REF eax
movl %eax, MIRROR_OBJECT_CLASS_OFFSET(%edi)
movl %ecx, MIRROR_ARRAY_LENGTH_OFFSET(%edi)
movl %edi, %eax
POP edi
ret // Fast path succeeded.
END_MACRO
MACRO1(COMPUTE_ARRAY_SIZE_UNKNOWN, slow_path)
// Possibly a large object, go slow.
// Also does negative array size check.
cmpl LITERAL((MIN_LARGE_OBJECT_THRESHOLD - MIRROR_WIDE_ARRAY_DATA_OFFSET) / 8), %ecx
ja RAW_VAR(slow_path)
PUSH ecx
movl %ecx, %edx
movl MIRROR_CLASS_COMPONENT_TYPE_OFFSET(%eax), %ecx // Load component type.
UNPOISON_HEAP_REF ecx
movl MIRROR_CLASS_OBJECT_PRIMITIVE_TYPE_OFFSET(%ecx), %ecx // Load primitive type.
shr MACRO_LITERAL(PRIMITIVE_TYPE_SIZE_SHIFT_SHIFT), %ecx // Get component size shift.
sall %cl, %edx // Calculate array count shifted.
// Add array header + alignment rounding.
add MACRO_LITERAL(MIRROR_INT_ARRAY_DATA_OFFSET + OBJECT_ALIGNMENT_MASK), %edx
// Add 4 extra bytes if we are doing a long array.
add MACRO_LITERAL(1), %ecx
and MACRO_LITERAL(4), %ecx
#if MIRROR_WIDE_ARRAY_DATA_OFFSET != MIRROR_INT_ARRAY_DATA_OFFSET + 4
#error Long array data offset must be 4 greater than int array data offset.
#endif
addl %ecx, %edx
POP ecx
END_MACRO
MACRO1(COMPUTE_ARRAY_SIZE_8, slow_path)
// EAX: mirror::Class* klass, ECX: int32_t component_count
// Possibly a large object, go slow.
// Also does negative array size check.
cmpl LITERAL(MIN_LARGE_OBJECT_THRESHOLD - MIRROR_INT_ARRAY_DATA_OFFSET), %ecx
ja RAW_VAR(slow_path)
// Add array header + alignment rounding.
leal (MIRROR_INT_ARRAY_DATA_OFFSET + OBJECT_ALIGNMENT_MASK)(%ecx), %edx
END_MACRO
MACRO1(COMPUTE_ARRAY_SIZE_16, slow_path)
// EAX: mirror::Class* klass, ECX: int32_t component_count
// Possibly a large object, go slow.
// Also does negative array size check.
cmpl LITERAL((MIN_LARGE_OBJECT_THRESHOLD - MIRROR_INT_ARRAY_DATA_OFFSET) / 2), %ecx
ja RAW_VAR(slow_path)
// Add array header + alignment rounding.
leal ((MIRROR_INT_ARRAY_DATA_OFFSET + OBJECT_ALIGNMENT_MASK) / 2)(%ecx), %edx
sall MACRO_LITERAL(1), %edx
END_MACRO
MACRO1(COMPUTE_ARRAY_SIZE_32, slow_path)
// EAX: mirror::Class* klass, ECX: int32_t component_count
// Possibly a large object, go slow.
// Also does negative array size check.
cmpl LITERAL((MIN_LARGE_OBJECT_THRESHOLD - MIRROR_INT_ARRAY_DATA_OFFSET) / 4), %ecx
ja RAW_VAR(slow_path)
// Add array header + alignment rounding.
leal ((MIRROR_INT_ARRAY_DATA_OFFSET + OBJECT_ALIGNMENT_MASK) / 4)(%ecx), %edx
sall MACRO_LITERAL(2), %edx
END_MACRO
MACRO1(COMPUTE_ARRAY_SIZE_64, slow_path)
// EAX: mirror::Class* klass, ECX: int32_t component_count
// Possibly a large object, go slow.
// Also does negative array size check.
cmpl LITERAL((MIN_LARGE_OBJECT_THRESHOLD - MIRROR_WIDE_ARRAY_DATA_OFFSET) / 8), %ecx
ja RAW_VAR(slow_path)
// Add array header + alignment rounding.
leal ((MIRROR_WIDE_ARRAY_DATA_OFFSET + OBJECT_ALIGNMENT_MASK) / 8)(%ecx), %edx
sall MACRO_LITERAL(3), %edx
END_MACRO
MACRO3(GENERATE_ALLOC_ARRAY_TLAB, c_entrypoint, cxx_name, size_setup)
DEFINE_FUNCTION VAR(c_entrypoint)
// EAX: mirror::Class* klass, ECX: int32_t component_count
PUSH edi
CALL_MACRO(size_setup) .Lslow_path\c_entrypoint
ALLOC_ARRAY_TLAB_FAST_PATH_RESOLVED_WITH_SIZE .Lslow_path\c_entrypoint
.Lslow_path\c_entrypoint:
POP edi
SETUP_SAVE_REFS_ONLY_FRAME ebx // save ref containing registers for GC
// Outgoing argument set up
PUSH eax // alignment padding
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
PUSH ecx
PUSH eax
call CALLVAR(cxx_name) // cxx_name(arg0, arg1, Thread*)
addl LITERAL(16), %esp // pop arguments
CFI_ADJUST_CFA_OFFSET(-16)
RESTORE_SAVE_REFS_ONLY_FRAME // restore frame up to return address
RETURN_IF_RESULT_IS_NON_ZERO_OR_DELIVER // return or deliver exception
END_FUNCTION VAR(c_entrypoint)
END_MACRO
GENERATE_ALLOC_ARRAY_TLAB art_quick_alloc_array_resolved_region_tlab, artAllocArrayFromCodeResolvedRegionTLAB, COMPUTE_ARRAY_SIZE_UNKNOWN
GENERATE_ALLOC_ARRAY_TLAB art_quick_alloc_array_resolved8_region_tlab, artAllocArrayFromCodeResolvedRegionTLAB, COMPUTE_ARRAY_SIZE_8
GENERATE_ALLOC_ARRAY_TLAB art_quick_alloc_array_resolved16_region_tlab, artAllocArrayFromCodeResolvedRegionTLAB, COMPUTE_ARRAY_SIZE_16
GENERATE_ALLOC_ARRAY_TLAB art_quick_alloc_array_resolved32_region_tlab, artAllocArrayFromCodeResolvedRegionTLAB, COMPUTE_ARRAY_SIZE_32
GENERATE_ALLOC_ARRAY_TLAB art_quick_alloc_array_resolved64_region_tlab, artAllocArrayFromCodeResolvedRegionTLAB, COMPUTE_ARRAY_SIZE_64
GENERATE_ALLOC_ARRAY_TLAB art_quick_alloc_array_resolved_tlab, artAllocArrayFromCodeResolvedTLAB, COMPUTE_ARRAY_SIZE_UNKNOWN
GENERATE_ALLOC_ARRAY_TLAB art_quick_alloc_array_resolved8_tlab, artAllocArrayFromCodeResolvedTLAB, COMPUTE_ARRAY_SIZE_8
GENERATE_ALLOC_ARRAY_TLAB art_quick_alloc_array_resolved16_tlab, artAllocArrayFromCodeResolvedTLAB, COMPUTE_ARRAY_SIZE_16
GENERATE_ALLOC_ARRAY_TLAB art_quick_alloc_array_resolved32_tlab, artAllocArrayFromCodeResolvedTLAB, COMPUTE_ARRAY_SIZE_32
GENERATE_ALLOC_ARRAY_TLAB art_quick_alloc_array_resolved64_tlab, artAllocArrayFromCodeResolvedTLAB, COMPUTE_ARRAY_SIZE_64
ONE_ARG_SAVE_EVERYTHING_DOWNCALL_FOR_CLINIT art_quick_initialize_static_storage, artInitializeStaticStorageFromCode
ONE_ARG_SAVE_EVERYTHING_DOWNCALL_FOR_CLINIT art_quick_resolve_type, artResolveTypeFromCode
ONE_ARG_SAVE_EVERYTHING_DOWNCALL art_quick_resolve_type_and_verify_access, artResolveTypeAndVerifyAccessFromCode
ONE_ARG_SAVE_EVERYTHING_DOWNCALL art_quick_resolve_method_handle, artResolveMethodHandleFromCode
ONE_ARG_SAVE_EVERYTHING_DOWNCALL art_quick_resolve_method_type, artResolveMethodTypeFromCode
ONE_ARG_SAVE_EVERYTHING_DOWNCALL art_quick_resolve_string, artResolveStringFromCode
TWO_ARG_REF_DOWNCALL art_quick_handle_fill_data, artHandleFillArrayDataFromCode, RETURN_IF_EAX_ZERO
/*
* Entry from managed code that tries to lock the object in a fast path and
* calls `artLockObjectFromCode()` for the difficult cases, may block for GC.
* EAX holds the possibly null object to lock.
*/
DEFINE_FUNCTION art_quick_lock_object
testl %eax, %eax
jz SYMBOL(art_quick_lock_object_no_inline)
movl %eax, %ecx // Move obj to a different register.
LOCK_OBJECT_FAST_PATH ecx, edx, /*saved_eax*/ none, .Llock_object_slow
.Llock_object_slow:
movl %ecx, %eax // Move obj back to EAX.
jmp SYMBOL(art_quick_lock_object_no_inline)
END_FUNCTION art_quick_lock_object
/*
* Entry from managed code that calls `artLockObjectFromCode()`, may block for GC.
* EAX holds the possibly null object to lock.
*/
DEFINE_FUNCTION art_quick_lock_object_no_inline
// This is also the slow path for art_quick_lock_object.
SETUP_SAVE_REFS_ONLY_FRAME ebx // save ref containing registers for GC
// Outgoing argument set up
INCREASE_FRAME 8 // alignment padding
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
PUSH_ARG eax // pass object
call SYMBOL(artLockObjectFromCode) // artLockObjectFromCode(object, Thread*)
DECREASE_FRAME 16 // pop arguments
RESTORE_SAVE_REFS_ONLY_FRAME // restore frame up to return address
RETURN_IF_EAX_ZERO
END_FUNCTION art_quick_lock_object_no_inline
/*
* Entry from managed code that tries to unlock the object in a fast path and calls
* `artUnlockObjectFromCode()` for the difficult cases and delivers exception on failure.
* EAX holds the possibly null object to unlock.
*/
DEFINE_FUNCTION art_quick_unlock_object
testl %eax, %eax
jz SYMBOL(art_quick_unlock_object_no_inline)
movl %eax, %ecx // Move obj to a different register.
UNLOCK_OBJECT_FAST_PATH ecx, edx, /*saved_eax*/ none, .Lunlock_object_slow
.Lunlock_object_slow:
movl %ecx, %eax // Move obj back to EAX.
jmp SYMBOL(art_quick_unlock_object_no_inline)
END_FUNCTION art_quick_unlock_object
/*
* Entry from managed code that calls `artUnlockObjectFromCode()`
* and delivers exception on failure.
* EAX holds the possibly null object to unlock.
*/
DEFINE_FUNCTION art_quick_unlock_object_no_inline
// This is also the slow path for art_quick_unlock_object.
SETUP_SAVE_REFS_ONLY_FRAME ebx // save ref containing registers for GC
// Outgoing argument set up
INCREASE_FRAME 8 // alignment padding
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
PUSH_ARG eax // pass object
call SYMBOL(artUnlockObjectFromCode) // artUnlockObjectFromCode(object, Thread*)
DECREASE_FRAME 16 // pop arguments
RESTORE_SAVE_REFS_ONLY_FRAME // restore frame up to return address
RETURN_IF_EAX_ZERO
END_FUNCTION art_quick_unlock_object_no_inline
DEFINE_FUNCTION art_quick_instance_of
PUSH eax // alignment padding
PUSH ecx // pass arg2 - obj->klass
PUSH eax // pass arg1 - checked class
call SYMBOL(artInstanceOfFromCode) // (Object* obj, Class* ref_klass)
addl LITERAL(12), %esp // pop arguments
CFI_ADJUST_CFA_OFFSET(-12)
ret
END_FUNCTION art_quick_instance_of
DEFINE_FUNCTION art_quick_check_instance_of
// Type check using the bit string passes null as the target class. In that case just throw.
testl %ecx, %ecx
jz .Lthrow_class_cast_exception_for_bitstring_check
PUSH eax // alignment padding
PUSH ecx // pass arg2 - checked class
PUSH eax // pass arg1 - obj
call SYMBOL(artInstanceOfFromCode) // (Object* obj, Class* ref_klass)
testl %eax, %eax
jz .Lthrow_class_cast_exception // jump forward if not assignable
addl LITERAL(12), %esp // pop arguments
CFI_ADJUST_CFA_OFFSET(-12)
ret
CFI_ADJUST_CFA_OFFSET(12) // Reset unwind info so following code unwinds.
.Lthrow_class_cast_exception:
POP eax // pop arguments
POP ecx
addl LITERAL(4), %esp
CFI_ADJUST_CFA_OFFSET(-4)
.Lthrow_class_cast_exception_for_bitstring_check:
SETUP_SAVE_ALL_CALLEE_SAVES_FRAME ebx // save all registers as basis for long jump context
// Outgoing argument set up
PUSH eax // alignment padding
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
PUSH ecx // pass arg2
PUSH eax // pass arg1
call SYMBOL(artThrowClassCastExceptionForObject) // (Object* src, Class* dest, Thread*)
UNREACHABLE
END_FUNCTION art_quick_check_instance_of
// Restore reg's value if reg is not the same as exclude_reg, otherwise just adjust stack.
MACRO2(POP_REG_NE, reg, exclude_reg)
.ifc RAW_VAR(reg), RAW_VAR(exclude_reg)
addl MACRO_LITERAL(4), %esp
CFI_ADJUST_CFA_OFFSET(-4)
.else
POP RAW_VAR(reg)
.endif
END_MACRO
/*
* Macro to insert read barrier, only used in art_quick_aput_obj.
* obj_reg and dest_reg are registers, offset is a defined literal such as
* MIRROR_OBJECT_CLASS_OFFSET.
* pop_eax is a boolean flag, indicating if eax is popped after the call.
* TODO: When read barrier has a fast path, add heap unpoisoning support for the fast path.
*/
MACRO4(READ_BARRIER, obj_reg, offset, dest_reg, pop_eax)
#ifdef USE_READ_BARRIER
PUSH eax // save registers used in art_quick_aput_obj
PUSH ebx
PUSH edx
PUSH ecx
// Outgoing argument set up
pushl MACRO_LITERAL((RAW_VAR(offset))) // pass offset, double parentheses are necessary
CFI_ADJUST_CFA_OFFSET(4)
PUSH RAW_VAR(obj_reg) // pass obj_reg
PUSH eax // pass ref, just pass eax for now since parameter ref is unused
call SYMBOL(artReadBarrierSlow) // artReadBarrierSlow(ref, obj_reg, offset)
// No need to unpoison return value in eax, artReadBarrierSlow() would do the unpoisoning.
.ifnc RAW_VAR(dest_reg), eax
movl %eax, REG_VAR(dest_reg) // save loaded ref in dest_reg
.endif
addl MACRO_LITERAL(12), %esp // pop arguments
CFI_ADJUST_CFA_OFFSET(-12)
POP_REG_NE ecx, RAW_VAR(dest_reg) // Restore args except dest_reg
POP_REG_NE edx, RAW_VAR(dest_reg)
POP_REG_NE ebx, RAW_VAR(dest_reg)
.ifc RAW_VAR(pop_eax), true
POP_REG_NE eax, RAW_VAR(dest_reg)
.endif
#else
movl RAW_VAR(offset)(REG_VAR(obj_reg)), REG_VAR(dest_reg)
UNPOISON_HEAP_REF RAW_VAR(dest_reg)
#endif // USE_READ_BARRIER
END_MACRO
DEFINE_FUNCTION art_quick_aput_obj
test %edx, %edx // store of null
jz .Ldo_aput_null
READ_BARRIER eax, MIRROR_OBJECT_CLASS_OFFSET, ebx, true
READ_BARRIER ebx, MIRROR_CLASS_COMPONENT_TYPE_OFFSET, ebx, true
// value's type == array's component type - trivial assignability
#if defined(USE_READ_BARRIER)
READ_BARRIER edx, MIRROR_OBJECT_CLASS_OFFSET, eax, false
cmpl %eax, %ebx
POP eax // restore eax from the push in the beginning of READ_BARRIER macro
// This asymmetric push/pop saves a push of eax and maintains stack alignment.
#elif defined(USE_HEAP_POISONING)
PUSH eax // save eax
movl MIRROR_OBJECT_CLASS_OFFSET(%edx), %eax
UNPOISON_HEAP_REF eax
cmpl %eax, %ebx
POP eax // restore eax
#else
cmpl MIRROR_OBJECT_CLASS_OFFSET(%edx), %ebx
#endif
jne .Lcheck_assignability
.Ldo_aput:
POISON_HEAP_REF edx
movl %edx, MIRROR_OBJECT_ARRAY_DATA_OFFSET(%eax, %ecx, 4)
movl %fs:THREAD_CARD_TABLE_OFFSET, %edx
shrl LITERAL(CARD_TABLE_CARD_SHIFT), %eax
movb %dl, (%edx, %eax)
ret
.Ldo_aput_null:
movl %edx, MIRROR_OBJECT_ARRAY_DATA_OFFSET(%eax, %ecx, 4)
ret
.Lcheck_assignability:
PUSH eax // save arguments
PUSH ecx
PUSH edx
#if defined(USE_READ_BARRIER)
subl LITERAL(4), %esp // alignment padding
CFI_ADJUST_CFA_OFFSET(4)
READ_BARRIER edx, MIRROR_OBJECT_CLASS_OFFSET, eax, true
subl LITERAL(4), %esp // alignment padding
CFI_ADJUST_CFA_OFFSET(4)
PUSH eax // pass arg2 - type of the value to be stored
#elif defined(USE_HEAP_POISONING)
subl LITERAL(8), %esp // alignment padding
CFI_ADJUST_CFA_OFFSET(8)
movl MIRROR_OBJECT_CLASS_OFFSET(%edx), %eax
UNPOISON_HEAP_REF eax
PUSH eax // pass arg2 - type of the value to be stored
#else
subl LITERAL(8), %esp // alignment padding
CFI_ADJUST_CFA_OFFSET(8)
pushl MIRROR_OBJECT_CLASS_OFFSET(%edx) // pass arg2 - type of the value to be stored
CFI_ADJUST_CFA_OFFSET(4)
#endif
PUSH ebx // pass arg1 - component type of the array
call SYMBOL(artIsAssignableFromCode) // (Class* a, Class* b)
addl LITERAL(16), %esp // pop arguments
CFI_ADJUST_CFA_OFFSET(-16)
testl %eax, %eax
jz .Lthrow_array_store_exception
POP edx
POP ecx
POP eax
POISON_HEAP_REF edx
movl %edx, MIRROR_OBJECT_ARRAY_DATA_OFFSET(%eax, %ecx, 4) // do the aput
movl %fs:THREAD_CARD_TABLE_OFFSET, %edx
shrl LITERAL(CARD_TABLE_CARD_SHIFT), %eax
movb %dl, (%edx, %eax)
ret
CFI_ADJUST_CFA_OFFSET(12) // 3 POP after the jz for unwinding.
.Lthrow_array_store_exception:
POP edx
POP ecx
POP eax
SETUP_SAVE_ALL_CALLEE_SAVES_FRAME ebx // save all registers as basis for long jump context
// Outgoing argument set up
PUSH eax // alignment padding
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
PUSH edx // pass arg2 - value
PUSH eax // pass arg1 - array
call SYMBOL(artThrowArrayStoreException) // (array, value, Thread*)
UNREACHABLE
END_FUNCTION art_quick_aput_obj
DEFINE_FUNCTION art_quick_memcpy
PUSH edx // pass arg3
PUSH ecx // pass arg2
PUSH eax // pass arg1
// PLT call requires EBX initialized to the $_GLOBAL_OFFSET_TABLE_.
SETUP_PC_REL_BASE_0 ebx
1:
addl $_GLOBAL_OFFSET_TABLE_ + (1b - 0b), %ebx
call PLT_SYMBOL(memcpy) // (void*, const void*, size_t)
addl LITERAL(12), %esp // pop arguments
CFI_ADJUST_CFA_OFFSET(-12)
ret
END_FUNCTION art_quick_memcpy
DEFINE_FUNCTION art_quick_test_suspend
SETUP_SAVE_EVERYTHING_FRAME ebx, RUNTIME_SAVE_EVERYTHING_FOR_SUSPEND_CHECK_METHOD_OFFSET // save everything for GC
// Outgoing argument set up
subl MACRO_LITERAL(12), %esp // push padding
CFI_ADJUST_CFA_OFFSET(12)
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
call SYMBOL(artTestSuspendFromCode) // (Thread*)
addl MACRO_LITERAL(16), %esp // pop arguments
CFI_ADJUST_CFA_OFFSET(-16)
RESTORE_SAVE_EVERYTHING_FRAME // restore frame up to return address
ret // return
END_FUNCTION art_quick_test_suspend
DEFINE_FUNCTION art_quick_d2l
subl LITERAL(12), %esp // alignment padding, room for argument
CFI_ADJUST_CFA_OFFSET(12)
movsd %xmm0, 0(%esp) // arg a
call SYMBOL(art_d2l) // (jdouble a)
addl LITERAL(12), %esp // pop arguments
CFI_ADJUST_CFA_OFFSET(-12)
ret
END_FUNCTION art_quick_d2l
DEFINE_FUNCTION art_quick_f2l
subl LITERAL(12), %esp // alignment padding
CFI_ADJUST_CFA_OFFSET(12)
movss %xmm0, 0(%esp) // arg a
call SYMBOL(art_f2l) // (jfloat a)
addl LITERAL(12), %esp // pop arguments
CFI_ADJUST_CFA_OFFSET(-12)
ret
END_FUNCTION art_quick_f2l
DEFINE_FUNCTION art_quick_ldiv
subl LITERAL(12), %esp // alignment padding
CFI_ADJUST_CFA_OFFSET(12)
PUSH ebx // pass arg4 b.hi
PUSH edx // pass arg3 b.lo
PUSH ecx // pass arg2 a.hi
PUSH eax // pass arg1 a.lo
call SYMBOL(artLdiv) // (jlong a, jlong b)
addl LITERAL(28), %esp // pop arguments
CFI_ADJUST_CFA_OFFSET(-28)
ret
END_FUNCTION art_quick_ldiv
DEFINE_FUNCTION art_quick_lmod
subl LITERAL(12), %esp // alignment padding
CFI_ADJUST_CFA_OFFSET(12)
PUSH ebx // pass arg4 b.hi
PUSH edx // pass arg3 b.lo
PUSH ecx // pass arg2 a.hi
PUSH eax // pass arg1 a.lo
call SYMBOL(artLmod) // (jlong a, jlong b)
addl LITERAL(28), %esp // pop arguments
CFI_ADJUST_CFA_OFFSET(-28)
ret
END_FUNCTION art_quick_lmod
DEFINE_FUNCTION art_quick_lmul
imul %eax, %ebx // ebx = a.lo(eax) * b.hi(ebx)
imul %edx, %ecx // ecx = b.lo(edx) * a.hi(ecx)
mul %edx // edx:eax = a.lo(eax) * b.lo(edx)
add %ebx, %ecx
add %ecx, %edx // edx += (a.lo * b.hi) + (b.lo * a.hi)
ret
END_FUNCTION art_quick_lmul
DEFINE_FUNCTION art_quick_lshl
// ecx:eax << edx
xchg %edx, %ecx
shld %cl,%eax,%edx
shl %cl,%eax
test LITERAL(32), %cl
jz 1f
mov %eax, %edx
xor %eax, %eax
1:
ret
END_FUNCTION art_quick_lshl
DEFINE_FUNCTION art_quick_lshr
// ecx:eax >> edx
xchg %edx, %ecx
shrd %cl,%edx,%eax
sar %cl,%edx
test LITERAL(32),%cl
jz 1f
mov %edx, %eax
sar LITERAL(31), %edx
1:
ret
END_FUNCTION art_quick_lshr
DEFINE_FUNCTION art_quick_lushr
// ecx:eax >>> edx
xchg %edx, %ecx
shrd %cl,%edx,%eax
shr %cl,%edx
test LITERAL(32),%cl
jz 1f
mov %edx, %eax
xor %edx, %edx
1:
ret
END_FUNCTION art_quick_lushr
// Note: Functions `art{Get,Set}<Kind>{Static,Instance}FromCompiledCode` are
// defined with a macro in runtime/entrypoints/quick/quick_field_entrypoints.cc.
ONE_ARG_REF_DOWNCALL art_quick_get_boolean_static, artGetBooleanStaticFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION
ONE_ARG_REF_DOWNCALL art_quick_get_byte_static, artGetByteStaticFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION
ONE_ARG_REF_DOWNCALL art_quick_get_char_static, artGetCharStaticFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION
ONE_ARG_REF_DOWNCALL art_quick_get_short_static, artGetShortStaticFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION
ONE_ARG_REF_DOWNCALL art_quick_get32_static, artGet32StaticFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION
ONE_ARG_REF_DOWNCALL art_quick_get64_static, artGet64StaticFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION
ONE_ARG_REF_DOWNCALL art_quick_get_obj_static, artGetObjStaticFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION
TWO_ARG_REF_DOWNCALL art_quick_get_boolean_instance, artGetBooleanInstanceFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION
TWO_ARG_REF_DOWNCALL art_quick_get_byte_instance, artGetByteInstanceFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION
TWO_ARG_REF_DOWNCALL art_quick_get_char_instance, artGetCharInstanceFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION
TWO_ARG_REF_DOWNCALL art_quick_get_short_instance, artGetShortInstanceFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION
TWO_ARG_REF_DOWNCALL art_quick_get32_instance, artGet32InstanceFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION
TWO_ARG_REF_DOWNCALL art_quick_get64_instance, artGet64InstanceFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION
TWO_ARG_REF_DOWNCALL art_quick_get_obj_instance, artGetObjInstanceFromCompiledCode, RETURN_OR_DELIVER_PENDING_EXCEPTION
TWO_ARG_REF_DOWNCALL art_quick_set8_static, artSet8StaticFromCompiledCode, RETURN_IF_EAX_ZERO
TWO_ARG_REF_DOWNCALL art_quick_set16_static, artSet16StaticFromCompiledCode, RETURN_IF_EAX_ZERO
TWO_ARG_REF_DOWNCALL art_quick_set32_static, artSet32StaticFromCompiledCode, RETURN_IF_EAX_ZERO
TWO_ARG_REF_DOWNCALL art_quick_set_obj_static, artSetObjStaticFromCompiledCode, RETURN_IF_EAX_ZERO
THREE_ARG_REF_DOWNCALL art_quick_set64_static, artSet64StaticFromCompiledCode, RETURN_IF_EAX_ZERO
THREE_ARG_REF_DOWNCALL art_quick_set8_instance, artSet8InstanceFromCompiledCode, RETURN_IF_EAX_ZERO
THREE_ARG_REF_DOWNCALL art_quick_set16_instance, artSet16InstanceFromCompiledCode, RETURN_IF_EAX_ZERO
THREE_ARG_REF_DOWNCALL art_quick_set32_instance, artSet32InstanceFromCompiledCode, RETURN_IF_EAX_ZERO
THREE_ARG_REF_DOWNCALL art_quick_set_obj_instance, artSetObjInstanceFromCompiledCode, RETURN_IF_EAX_ZERO
// Call artSet64InstanceFromCode with 4 word size arguments.
DEFINE_FUNCTION art_quick_set64_instance
movd %ebx, %xmm0
SETUP_SAVE_REFS_ONLY_FRAME ebx // save ref containing registers for GC
movd %xmm0, %ebx
// Outgoing argument set up
subl LITERAL(12), %esp // alignment padding
CFI_ADJUST_CFA_OFFSET(12)
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
PUSH ebx // pass high half of new_val
PUSH edx // pass low half of new_val
PUSH ecx // pass object
PUSH eax // pass field_idx
call SYMBOL(artSet64InstanceFromCompiledCode) // (field_idx, Object*, new_val, Thread*)
addl LITERAL(32), %esp // pop arguments
CFI_ADJUST_CFA_OFFSET(-32)
RESTORE_SAVE_REFS_ONLY_FRAME // restore frame up to return address
RETURN_IF_EAX_ZERO // return or deliver exception
END_FUNCTION art_quick_set64_instance
DEFINE_FUNCTION art_quick_proxy_invoke_handler
SETUP_SAVE_REFS_AND_ARGS_FRAME_WITH_METHOD_IN_EAX
PUSH esp // pass SP
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
PUSH ecx // pass receiver
PUSH eax // pass proxy method
call SYMBOL(artQuickProxyInvokeHandler) // (proxy method, receiver, Thread*, SP)
movd %eax, %xmm0 // place return value also into floating point return value
movd %edx, %xmm1
punpckldq %xmm1, %xmm0
addl LITERAL(16 + FRAME_SIZE_SAVE_REFS_AND_ARGS - FRAME_SIZE_SAVE_REFS_ONLY), %esp
CFI_ADJUST_CFA_OFFSET(-(16 + FRAME_SIZE_SAVE_REFS_AND_ARGS - FRAME_SIZE_SAVE_REFS_ONLY))
RESTORE_SAVE_REFS_ONLY_FRAME
RETURN_OR_DELIVER_PENDING_EXCEPTION // return or deliver exception
END_FUNCTION art_quick_proxy_invoke_handler
/*
* Called to resolve an imt conflict.
* eax is the conflict ArtMethod.
* xmm7 is a hidden argument that holds the target interface method.
*
* Note that this stub writes to eax.
* Because of lack of free registers, it also saves and restores esi.
*/
DEFINE_FUNCTION art_quick_imt_conflict_trampoline
PUSH ESI
movd %xmm7, %esi // Get target method index stored in xmm7, remember it in ESI.
movl ART_METHOD_JNI_OFFSET_32(%eax), %eax // Load ImtConflictTable.
.Limt_table_iterate:
cmpl %esi, 0(%eax)
jne .Limt_table_next_entry
// We successfully hit an entry in the table. Load the target method
// and jump to it.
movl __SIZEOF_POINTER__(%eax), %eax
CFI_REMEMBER_STATE
POP ESI
jmp *ART_METHOD_QUICK_CODE_OFFSET_32(%eax)
CFI_RESTORE_STATE_AND_DEF_CFA esp, 8
.Limt_table_next_entry:
// If the entry is null, the interface method is not in the ImtConflictTable.
cmpl LITERAL(0), 0(%eax)
jz .Lconflict_trampoline
// Iterate over the entries of the ImtConflictTable.
addl LITERAL(2 * __SIZEOF_POINTER__), %eax
jmp .Limt_table_iterate
.Lconflict_trampoline:
// Call the runtime stub to populate the ImtConflictTable and jump to the
// resolved method.
// Pass the interface method in first argument.
movl %esi, %eax
POP ESI
INVOKE_TRAMPOLINE_BODY artInvokeInterfaceTrampoline
END_FUNCTION art_quick_imt_conflict_trampoline
DEFINE_FUNCTION art_quick_resolution_trampoline
SETUP_SAVE_REFS_AND_ARGS_FRAME ebx
movl %esp, %edi
PUSH EDI // pass SP. do not just PUSH ESP; that messes up unwinding
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
PUSH ecx // pass receiver
PUSH eax // pass method
call SYMBOL(artQuickResolutionTrampoline) // (Method* called, receiver, Thread*, SP)
movl %eax, %edi // remember code pointer in EDI
addl LITERAL(16), %esp // pop arguments
CFI_ADJUST_CFA_OFFSET(-16)
test %eax, %eax // if code pointer is null goto deliver pending exception
jz 1f
RESTORE_SAVE_REFS_AND_ARGS_FRAME_AND_JUMP
1:
RESTORE_SAVE_REFS_AND_ARGS_FRAME
DELIVER_PENDING_EXCEPTION
END_FUNCTION art_quick_resolution_trampoline
DEFINE_FUNCTION art_quick_generic_jni_trampoline
SETUP_SAVE_REFS_AND_ARGS_FRAME_WITH_METHOD_IN_EAX
movl %esp, %ebp // save SP at callee-save frame
CFI_DEF_CFA_REGISTER(ebp)
subl LITERAL(5120), %esp
// prepare for artQuickGenericJniTrampoline call
// (Thread*, managed_sp, reserved_area)
// (esp) 4(esp) 8(esp) <= C calling convention
// fs:... ebp esp <= where they are
movl %esp, %eax
subl LITERAL(4), %esp // Padding for 16B alignment.
pushl %eax // Pass reserved area.
pushl %ebp // Pass managed frame SP.
pushl %fs:THREAD_SELF_OFFSET // Pass Thread::Current().
call SYMBOL(artQuickGenericJniTrampoline) // (Thread*, sp)
// The C call will have registered the complete save-frame on success.
// The result of the call is:
// eax: pointer to native code, 0 on error.
// The bottom of the reserved area contains values for arg registers,
// hidden arg register and SP for out args for the call.
// Check for error (class init check or locking for synchronized native method can throw).
test %eax, %eax
jz .Lexception_in_native
// On x86 there are no registers passed, so no native call args to pop here.
// Save code pointer in EDX.
movl %eax, %edx
// Load hidden arg (EAX) for @CriticalNative.
movl 16(%esp), %eax
// Load SP for out args, releasing unneeded reserved area.
movl 20(%esp), %esp
// Native call.
call *%edx
// result sign extension is handled in C code
// prepare for artQuickGenericJniEndTrampoline call
// (Thread*, result, result_f)
// (esp) 4(esp) 12(esp) <= C calling convention
// fs:... eax:edx fp0 <= where they are
subl LITERAL(20), %esp // Padding & pass float result.
fstpl (%esp)
pushl %edx // Pass int result.
pushl %eax
pushl %fs:THREAD_SELF_OFFSET // Pass Thread::Current().
call SYMBOL(artQuickGenericJniEndTrampoline)
// Pending exceptions possible.
mov %fs:THREAD_EXCEPTION_OFFSET, %ebx
testl %ebx, %ebx
jnz .Lexception_in_native
// Tear down the alloca.
movl %ebp, %esp
CFI_REMEMBER_STATE
CFI_DEF_CFA_REGISTER(esp)
// Tear down the callee-save frame.
// Remove space for FPR args and EAX
addl LITERAL(4 + 4 * 8), %esp
CFI_ADJUST_CFA_OFFSET(-(4 + 4 * 8))
POP ecx
addl LITERAL(4), %esp // Avoid edx, as it may be part of the result.
CFI_ADJUST_CFA_OFFSET(-4)
POP ebx
POP ebp // Restore callee saves
POP esi
POP edi
// Quick expects the return value to be in xmm0.
movd %eax, %xmm0
movd %edx, %xmm1
punpckldq %xmm1, %xmm0
ret
// Undo the unwinding information from above since it doesn't apply below.
CFI_RESTORE_STATE_AND_DEF_CFA ebp, 64
.Lexception_in_native:
pushl %fs:THREAD_TOP_QUICK_FRAME_OFFSET
addl LITERAL(-1), (%esp) // Remove the GenericJNI tag.
movl (%esp), %esp
call art_deliver_pending_exception
END_FUNCTION art_quick_generic_jni_trampoline
DEFINE_FUNCTION art_deliver_pending_exception
// This will create a new save-all frame, required by the runtime.
DELIVER_PENDING_EXCEPTION
END_FUNCTION art_deliver_pending_exception
DEFINE_FUNCTION art_quick_to_interpreter_bridge
SETUP_SAVE_REFS_AND_ARGS_FRAME ebx // save frame
mov %esp, %edx // remember SP
PUSH eax // alignment padding
PUSH edx // pass SP
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
PUSH eax // pass method
call SYMBOL(artQuickToInterpreterBridge) // (method, Thread*, SP)
addl LITERAL(16), %esp // pop arguments
CFI_ADJUST_CFA_OFFSET(-16)
// Return eax:edx in xmm0 also.
movd %eax, %xmm0
movd %edx, %xmm1
punpckldq %xmm1, %xmm0
addl LITERAL(48), %esp // Remove FPRs and EAX, ECX, EDX, EBX.
CFI_ADJUST_CFA_OFFSET(-48)
POP ebp // Restore callee saves
POP esi
POP edi
RETURN_OR_DELIVER_PENDING_EXCEPTION // return or deliver exception
END_FUNCTION art_quick_to_interpreter_bridge
/*
* Called by managed code, saves callee saves and then calls artInvokeObsoleteMethod
*/
ONE_ARG_RUNTIME_EXCEPTION art_invoke_obsolete_method_stub, artInvokeObsoleteMethod
/*
* Routine that intercepts method calls and returns.
*/
DEFINE_FUNCTION art_quick_instrumentation_entry
SETUP_SAVE_REFS_AND_ARGS_FRAME edx
PUSH eax // Save eax which will be clobbered by the callee-save method.
subl LITERAL(16), %esp // Align stack (12 bytes) and reserve space for the SP argument
CFI_ADJUST_CFA_OFFSET(16) // (4 bytes). We lack the scratch registers to calculate the SP
// right now, so we will just fill it in later.
pushl %fs:THREAD_SELF_OFFSET // Pass Thread::Current().
CFI_ADJUST_CFA_OFFSET(4)
PUSH ecx // Pass receiver.
PUSH eax // Pass Method*.
leal 32(%esp), %eax // Put original SP into eax
movl %eax, 12(%esp) // set SP
call SYMBOL(artInstrumentationMethodEntryFromCode) // (Method*, Object*, Thread*, SP)
addl LITERAL(28), %esp // Pop arguments upto saved Method*.
CFI_ADJUST_CFA_OFFSET(-28)
testl %eax, %eax
jz 1f // Test for null return (indicating exception) and handle it.
movl 60(%esp), %edi // Restore edi.
movl %eax, 60(%esp) // Place code* over edi, just under return pc.
SETUP_PC_REL_BASE ebx, .Linstrumentation_entry_pc_rel_base
leal SYMBOL(art_quick_instrumentation_exit) - .Linstrumentation_entry_pc_rel_base(%ebx), %ebx
// Place instrumentation exit as return pc. ebx holds the GOT computed on entry.
movl %ebx, 64(%esp)
movl 0(%esp), %eax // Restore eax.
// Restore FPRs (extra 4 bytes of offset due to EAX push at top).
movsd 8(%esp), %xmm0
movsd 16(%esp), %xmm1
movsd 24(%esp), %xmm2
movsd 32(%esp), %xmm3
// Restore GPRs.
movl 40(%esp), %ecx // Restore ecx.
movl 44(%esp), %edx // Restore edx.
movl 48(%esp), %ebx // Restore ebx.
movl 52(%esp), %ebp // Restore ebp.
movl 56(%esp), %esi // Restore esi.
addl LITERAL(60), %esp // Wind stack back upto code*.
CFI_ADJUST_CFA_OFFSET(-60)
ret // Call method (and pop).
1:
// Make caller handle exception
addl LITERAL(4), %esp
CFI_ADJUST_CFA_OFFSET(-4)
RESTORE_SAVE_REFS_AND_ARGS_FRAME
DELIVER_PENDING_EXCEPTION
END_FUNCTION art_quick_instrumentation_entry
DEFINE_FUNCTION_CUSTOM_CFA art_quick_instrumentation_exit, 0
pushl LITERAL(0) // Push a fake return PC as there will be none on the stack.
CFI_ADJUST_CFA_OFFSET(4)
SETUP_SAVE_EVERYTHING_FRAME ebx
movl %esp, %ecx // Remember SP
subl LITERAL(8), %esp // Align stack.
CFI_ADJUST_CFA_OFFSET(8)
PUSH edx // Save gpr return value. edx and eax need to be together,
// which isn't the case in kSaveEverything frame.
PUSH eax
leal 32(%esp), %eax // Get pointer to fpr_result, in kSaveEverything frame
movl %esp, %edx // Get pointer to gpr_result
PUSH eax // Pass fpr_result
PUSH edx // Pass gpr_result
PUSH ecx // Pass SP
pushl %fs:THREAD_SELF_OFFSET // Pass Thread::Current.
CFI_ADJUST_CFA_OFFSET(4)
call SYMBOL(artInstrumentationMethodExitFromCode) // (Thread*, SP, gpr_result*, fpr_result*)
// Return result could have been changed if it's a reference.
movl 16(%esp), %ecx
movl %ecx, (80+32)(%esp)
addl LITERAL(32), %esp // Pop arguments and grp_result.
CFI_ADJUST_CFA_OFFSET(-32)
testl %eax, %eax // Check if we returned error.
jz .Ldo_deliver_instrumentation_exception
testl %edx, %edx
jnz .Ldeoptimize
// Normal return.
movl %eax, FRAME_SIZE_SAVE_EVERYTHING-4(%esp) // Set return pc.
RESTORE_SAVE_EVERYTHING_FRAME
ret
.Ldeoptimize:
mov %edx, (FRAME_SIZE_SAVE_EVERYTHING-4)(%esp) // Set return pc.
RESTORE_SAVE_EVERYTHING_FRAME
jmp SYMBOL(art_quick_deoptimize)
.Ldo_deliver_instrumentation_exception:
DELIVER_PENDING_EXCEPTION_FRAME_READY
END_FUNCTION art_quick_instrumentation_exit
/*
* Instrumentation has requested that we deoptimize into the interpreter. The deoptimization
* will long jump to the upcall with a special exception of -1.
*/
DEFINE_FUNCTION art_quick_deoptimize
SETUP_SAVE_EVERYTHING_FRAME ebx
subl LITERAL(12), %esp // Align stack.
CFI_ADJUST_CFA_OFFSET(12)
pushl %fs:THREAD_SELF_OFFSET // Pass Thread::Current().
CFI_ADJUST_CFA_OFFSET(4)
call SYMBOL(artDeoptimize) // (Thread*)
UNREACHABLE
END_FUNCTION art_quick_deoptimize
/*
* Compiled code has requested that we deoptimize into the interpreter. The deoptimization
* will long jump to the interpreter bridge.
*/
DEFINE_FUNCTION art_quick_deoptimize_from_compiled_code
SETUP_SAVE_EVERYTHING_FRAME ebx
subl LITERAL(8), %esp // Align stack.
CFI_ADJUST_CFA_OFFSET(8)
pushl %fs:THREAD_SELF_OFFSET // Pass Thread::Current().
CFI_ADJUST_CFA_OFFSET(4)
PUSH eax
call SYMBOL(artDeoptimizeFromCompiledCode) // (DeoptimizationKind, Thread*)
UNREACHABLE
END_FUNCTION art_quick_deoptimize_from_compiled_code
/*
* String's compareTo.
*
* On entry:
* eax: this string object (known non-null)
* ecx: comp string object (known non-null)
*/
DEFINE_FUNCTION art_quick_string_compareto
PUSH esi // push callee save reg
PUSH edi // push callee save reg
mov MIRROR_STRING_COUNT_OFFSET(%eax), %edx
mov MIRROR_STRING_COUNT_OFFSET(%ecx), %ebx
lea MIRROR_STRING_VALUE_OFFSET(%eax), %esi
lea MIRROR_STRING_VALUE_OFFSET(%ecx), %edi
#if (STRING_COMPRESSION_FEATURE)
/* Differ cases */
shrl LITERAL(1), %edx
jnc .Lstring_compareto_this_is_compressed
shrl LITERAL(1), %ebx
jnc .Lstring_compareto_that_is_compressed
jmp .Lstring_compareto_both_not_compressed
.Lstring_compareto_this_is_compressed:
shrl LITERAL(1), %ebx
jnc .Lstring_compareto_both_compressed
/* If (this->IsCompressed() && that->IsCompressed() == false) */
mov %edx, %eax
subl %ebx, %eax
mov %edx, %ecx
cmovg %ebx, %ecx
/* Going into loop to compare each character */
jecxz .Lstring_compareto_keep_length // check loop counter (if 0, don't compare)
.Lstring_compareto_loop_comparison_this_compressed:
movzbl (%esi), %edx // move *(this_cur_char) byte to long
movzwl (%edi), %ebx // move *(that_cur_char) word to long
addl LITERAL(1), %esi // ++this_cur_char (8-bit)
addl LITERAL(2), %edi // ++that_cur_char (16-bit)
subl %ebx, %edx
loope .Lstring_compareto_loop_comparison_this_compressed
cmovne %edx, %eax // return eax = *(this_cur_char) - *(that_cur_char)
jmp .Lstring_compareto_return
.Lstring_compareto_that_is_compressed:
mov %edx, %eax
subl %ebx, %eax
mov %edx, %ecx
cmovg %ebx, %ecx
/* If (this->IsCompressed() == false && that->IsCompressed()) */
jecxz .Lstring_compareto_keep_length // check loop counter, if 0, don't compare
.Lstring_compareto_loop_comparison_that_compressed:
movzwl (%esi), %edx // move *(this_cur_char) word to long
movzbl (%edi), %ebx // move *(that_cur_char) byte to long
addl LITERAL(2), %esi // ++this_cur_char (16-bit)
addl LITERAL(1), %edi // ++that_cur_char (8-bit)
subl %ebx, %edx
loope .Lstring_compareto_loop_comparison_that_compressed
cmovne %edx, %eax
jmp .Lstring_compareto_return // return eax = *(this_cur_char) - *(that_cur_char)
.Lstring_compareto_both_compressed:
/* Calculate min length and count diff */
mov %edx, %ecx
mov %edx, %eax
subl %ebx, %eax
cmovg %ebx, %ecx
jecxz .Lstring_compareto_keep_length
repe cmpsb
je .Lstring_compareto_keep_length
movzbl -1(%esi), %eax // get last compared char from this string (8-bit)
movzbl -1(%edi), %ecx // get last compared char from comp string (8-bit)
jmp .Lstring_compareto_count_difference
#endif // STRING_COMPRESSION_FEATURE
.Lstring_compareto_both_not_compressed:
/* Calculate min length and count diff */
mov %edx, %ecx
mov %edx, %eax
subl %ebx, %eax
cmovg %ebx, %ecx
/*
* At this point we have:
* eax: value to return if first part of strings are equal
* ecx: minimum among the lengths of the two strings
* esi: pointer to this string data
* edi: pointer to comp string data
*/
jecxz .Lstring_compareto_keep_length
repe cmpsw // find nonmatching chars in [%esi] and [%edi], up to length %ecx
je .Lstring_compareto_keep_length
movzwl -2(%esi), %eax // get last compared char from this string (16-bit)
movzwl -2(%edi), %ecx // get last compared char from comp string (16-bit)
.Lstring_compareto_count_difference:
subl %ecx, %eax
.Lstring_compareto_keep_length:
.Lstring_compareto_return:
POP edi // pop callee save reg
POP esi // pop callee save reg
ret
END_FUNCTION art_quick_string_compareto
DEFINE_FUNCTION art_quick_string_builder_append
SETUP_SAVE_REFS_ONLY_FRAME ebx // save ref containing registers for GC
// Outgoing argument set up
leal FRAME_SIZE_SAVE_REFS_ONLY + __SIZEOF_POINTER__(%esp), %edi // prepare args
push %eax // push padding
CFI_ADJUST_CFA_OFFSET(4)
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
push %edi // pass args
CFI_ADJUST_CFA_OFFSET(4)
push %eax // pass format
CFI_ADJUST_CFA_OFFSET(4)
call SYMBOL(artStringBuilderAppend) // (uint32_t, const unit32_t*, Thread*)
addl MACRO_LITERAL(16), %esp // pop arguments
CFI_ADJUST_CFA_OFFSET(-16)
RESTORE_SAVE_REFS_ONLY_FRAME // restore frame up to return address
RETURN_IF_RESULT_IS_NON_ZERO_OR_DELIVER // return or deliver exception
END_FUNCTION art_quick_string_builder_append
// Create a function `name` calling the ReadBarrier::Mark routine,
// getting its argument and returning its result through register
// `reg`, saving and restoring all caller-save registers.
//
// If `reg` is different from `eax`, the generated function follows a
// non-standard runtime calling convention:
// - register `reg` is used to pass the (sole) argument of this function
// (instead of EAX);
// - register `reg` is used to return the result of this function
// (instead of EAX);
// - EAX is treated like a normal (non-argument) caller-save register;
// - everything else is the same as in the standard runtime calling
// convention (e.g. standard callee-save registers are preserved).
MACRO2(READ_BARRIER_MARK_REG, name, reg)
DEFINE_FUNCTION VAR(name)
// Null check so that we can load the lock word.
test REG_VAR(reg), REG_VAR(reg)
jz .Lret_rb_\name
.Lnot_null_\name:
// Check the mark bit, if it is 1 return.
testl LITERAL(LOCK_WORD_MARK_BIT_MASK_SHIFTED), MIRROR_OBJECT_LOCK_WORD_OFFSET(REG_VAR(reg))
jz .Lslow_rb_\name
ret
.Lslow_rb_\name:
PUSH eax
mov MIRROR_OBJECT_LOCK_WORD_OFFSET(REG_VAR(reg)), %eax
add LITERAL(LOCK_WORD_STATE_FORWARDING_ADDRESS_OVERFLOW), %eax
// Jump if overflow, the only case where it overflows should be the forwarding address one.
// Taken ~25% of the time.
jnae .Lret_forwarding_address\name
// Save all potentially live caller-save core registers.
mov 0(%esp), %eax
PUSH ecx
PUSH edx
PUSH ebx
// 8-byte align the stack to improve (8-byte) XMM register saving and restoring.
// and create space for caller-save floating-point registers.
subl MACRO_LITERAL(4 + 8 * 8), %esp
CFI_ADJUST_CFA_OFFSET(4 + 8 * 8)
// Save all potentially live caller-save floating-point registers.
movsd %xmm0, 0(%esp)
movsd %xmm1, 8(%esp)
movsd %xmm2, 16(%esp)
movsd %xmm3, 24(%esp)
movsd %xmm4, 32(%esp)
movsd %xmm5, 40(%esp)
movsd %xmm6, 48(%esp)
movsd %xmm7, 56(%esp)
subl LITERAL(4), %esp // alignment padding
CFI_ADJUST_CFA_OFFSET(4)
PUSH RAW_VAR(reg) // pass arg1 - obj from `reg`
call SYMBOL(artReadBarrierMark) // artReadBarrierMark(obj)
.ifnc RAW_VAR(reg), eax
movl %eax, REG_VAR(reg) // return result into `reg`
.endif
addl LITERAL(8), %esp // pop argument and remove padding
CFI_ADJUST_CFA_OFFSET(-8)
// Restore floating-point registers.
movsd 0(%esp), %xmm0
movsd 8(%esp), %xmm1
movsd 16(%esp), %xmm2
movsd 24(%esp), %xmm3
movsd 32(%esp), %xmm4
movsd 40(%esp), %xmm5
movsd 48(%esp), %xmm6
movsd 56(%esp), %xmm7
// Remove floating-point registers and padding.
addl MACRO_LITERAL(8 * 8 + 4), %esp
CFI_ADJUST_CFA_OFFSET(-(8 * 8 + 4))
// Restore core regs, except `reg`, as it is used to return the
// result of this function (simply remove it from the stack instead).
POP_REG_NE ebx, RAW_VAR(reg)
POP_REG_NE edx, RAW_VAR(reg)
POP_REG_NE ecx, RAW_VAR(reg)
POP_REG_NE eax, RAW_VAR(reg)
.Lret_rb_\name:
ret
.Lret_forwarding_address\name:
// The overflow cleared the top bits.
sall LITERAL(LOCK_WORD_STATE_FORWARDING_ADDRESS_SHIFT), %eax
mov %eax, REG_VAR(reg)
POP_REG_NE eax, RAW_VAR(reg)
ret
END_FUNCTION VAR(name)
END_MACRO
READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg00, eax
READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg01, ecx
READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg02, edx
READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg03, ebx
READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg05, ebp
// Note: There is no art_quick_read_barrier_mark_reg04, as register 4 (ESP)
// cannot be used to pass arguments.
READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg06, esi
READ_BARRIER_MARK_REG art_quick_read_barrier_mark_reg07, edi
DEFINE_FUNCTION art_quick_read_barrier_slow
PUSH edx // pass arg3 - offset
PUSH ecx // pass arg2 - obj
PUSH eax // pass arg1 - ref
call SYMBOL(artReadBarrierSlow) // artReadBarrierSlow(ref, obj, offset)
addl LITERAL(12), %esp // pop arguments
CFI_ADJUST_CFA_OFFSET(-12)
ret
END_FUNCTION art_quick_read_barrier_slow
DEFINE_FUNCTION art_quick_read_barrier_for_root_slow
subl LITERAL(8), %esp // alignment padding
CFI_ADJUST_CFA_OFFSET(8)
PUSH eax // pass arg1 - root
call SYMBOL(artReadBarrierForRootSlow) // artReadBarrierForRootSlow(root)
addl LITERAL(12), %esp // pop argument and remove padding
CFI_ADJUST_CFA_OFFSET(-12)
ret
END_FUNCTION art_quick_read_barrier_for_root_slow
/*
* On stack replacement stub.
* On entry:
* [sp] = return address
* [sp + 4] = stack to copy
* [sp + 8] = size of stack
* [sp + 12] = pc to call
* [sp + 16] = JValue* result
* [sp + 20] = shorty
* [sp + 24] = thread
*/
DEFINE_FUNCTION art_quick_osr_stub
// Save native callee saves.
PUSH ebp
PUSH ebx
PUSH esi
PUSH edi
SAVE_SIZE=20 // 4 registers and the return address
mov 4+16(%esp), %esi // ESI = argument array
mov 8+16(%esp), %ecx // ECX = size of args
mov 12+16(%esp), %ebx // EBX = pc to call
mov %esp, %ebp // Save stack pointer
CFI_DEF_CFA(ebp, SAVE_SIZE) // CFA = ebp + SAVE_SIZE
CFI_REMEMBER_STATE
andl LITERAL(0xFFFFFFF0), %esp // Align stack
pushl %ebp // Save old stack pointer
subl LITERAL(12), %esp // Align stack
movl LITERAL(0), (%esp) // Store null for ArtMethod* slot
// ebp isn't properly spilled in the osr method, so we need use DWARF expression.
// NB: the CFI must be before the call since this is the address gdb will lookup.
// NB: gdb expects that cfa_expression returns the CFA value (not address to it).
CFI_ESCAPE( /* cfa = [sp + 12] + SAVE_SIZE */ \
0x0f, 6, /* DW_CFA_def_cfa_expression(len) */ \
0x92, 4, 12, /* DW_OP_bregx(reg,offset) */ \
0x06, /* DW_OP_deref */ \
0x23, SAVE_SIZE) /* DW_OP_plus_uconst(val) */
call .Losr_entry
mov 12(%esp), %esp // Restore stack pointer.
CFI_DEF_CFA(esp, SAVE_SIZE) // CFA = esp + SAVE_SIZE
// Restore callee saves.
POP edi
POP esi
POP ebx
POP ebp
mov 16(%esp), %ecx // Get JValue result
mov %eax, (%ecx) // Store the result.
mov %edx, 4(%ecx) // Store the other half of the result.
ret
.Losr_entry:
CFI_RESTORE_STATE_AND_DEF_CFA ebp, SAVE_SIZE // CFA = ebp + SAVE_SIZE
subl LITERAL(4), %ecx // Given stack size contains pushed frame pointer, substract it.
subl %ecx, %esp
mov %esp, %edi // EDI = beginning of stack
rep movsb // while (ecx--) { *edi++ = *esi++ }
jmp *%ebx
END_FUNCTION art_quick_osr_stub
DEFINE_FUNCTION art_quick_invoke_polymorphic
// On entry: EAX := unused, ECX := receiver
SETUP_SAVE_REFS_AND_ARGS_FRAME ebx // Save frame.
mov %esp, %edx // Remember SP
sub LITERAL(4), %esp // Alignment padding
CFI_ADJUST_CFA_OFFSET(4)
push %edx // Push SP
CFI_ADJUST_CFA_OFFSET(4)
pushl %fs:THREAD_SELF_OFFSET // Push Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
push %ecx // Push receiver (method handle)
CFI_ADJUST_CFA_OFFSET(4)
call SYMBOL(artInvokePolymorphic) // invoke with (receiver, thread, SP)
addl LITERAL(16), %esp // Pop arguments.
CFI_ADJUST_CFA_OFFSET(-16)
mov %eax, 4(%esp) // Result is in EAX:EDX. Copy to saved FP state.
mov %edx, 8(%esp)
mov %edx, 40(%esp) // Copy EDX to saved context
RESTORE_SAVE_REFS_AND_ARGS_FRAME
RETURN_OR_DELIVER_PENDING_EXCEPTION
END_FUNCTION art_quick_invoke_polymorphic
DEFINE_FUNCTION art_quick_invoke_custom
SETUP_SAVE_REFS_AND_ARGS_FRAME ebx // Save frame.
// EAX := call_site_index
mov %esp, %ecx // Remember SP.
subl LITERAL(4), %esp // Alignment padding.
CFI_ADJUST_CFA_OFFSET(4)
push %ecx // pass SP
CFI_ADJUST_CFA_OFFSET(4)
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
push %eax // pass call_site_index
CFI_ADJUST_CFA_OFFSET(4)
call SYMBOL(artInvokeCustom) // artInvokeCustom(call_site_index, Thread*, SP)
addl LITERAL(16), %esp // Pop arguments.
CFI_ADJUST_CFA_OFFSET(-16)
mov %eax, 4(%esp) // Result is in EAX:EDX. Copy to saved FP state.
mov %edx, 8(%esp)
mov %edx, 40(%esp) // Copy EDX to saved context
RESTORE_SAVE_REFS_AND_ARGS_FRAME
RETURN_OR_DELIVER_PENDING_EXCEPTION
END_FUNCTION art_quick_invoke_custom
// Wrap ExecuteSwitchImpl in assembly method which specifies DEX PC for unwinding.
// Argument 0: ESP+4: The context pointer for ExecuteSwitchImpl.
// Argument 1: ESP+8: Pointer to the templated ExecuteSwitchImpl to call.
// Argument 2: ESP+12: The value of DEX PC (memory address of the methods bytecode).
DEFINE_FUNCTION ExecuteSwitchImplAsm
PUSH ebx // Spill EBX; Increments ESP, so arg0 is at ESP+8 now.
mov 12(%esp), %eax // EAX = C++ templated interpreter function
mov 16(%esp), %ebx // EBX = DEX PC (callee save register)
mov 8(%esp), %ecx // ECX = Context argument for the function
CFI_DEFINE_DEX_PC_WITH_OFFSET(0 /* EAX */, 3 /* EBX */, 0)
sub LITERAL(4), %esp // Alignment padding
CFI_ADJUST_CFA_OFFSET(4)
push %ecx // Push argument
CFI_ADJUST_CFA_OFFSET(4)
call *%eax // Call the wrapped function
addl LITERAL(8), %esp
CFI_ADJUST_CFA_OFFSET(-8)
POP ebx // Restore EBX
ret
END_FUNCTION ExecuteSwitchImplAsm
// On entry: eax is the class, ebp is the inline cache.
DEFINE_FUNCTION art_quick_update_inline_cache
#if (INLINE_CACHE_SIZE != 5)
#error "INLINE_CACHE_SIZE not as expected."
#endif
// Don't update the cache if we are marking.
cmpl LITERAL(0), %fs:THREAD_IS_GC_MARKING_OFFSET
jnz .Lret
PUSH ecx
movl %eax, %ecx // eax will be used for cmpxchg
.Lentry1:
movl INLINE_CACHE_CLASSES_OFFSET(%ebp), %eax
cmpl %ecx, %eax
je .Ldone
cmpl LITERAL(0), %eax
jne .Lentry2
lock cmpxchg %ecx, INLINE_CACHE_CLASSES_OFFSET(%ebp)
jz .Ldone
jmp .Lentry1
.Lentry2:
movl (INLINE_CACHE_CLASSES_OFFSET+4)(%ebp), %eax
cmpl %ecx, %eax
je .Ldone
cmpl LITERAL(0), %eax
jne .Lentry3
lock cmpxchg %ecx, (INLINE_CACHE_CLASSES_OFFSET+4)(%ebp)
jz .Ldone
jmp .Lentry2
.Lentry3:
movl (INLINE_CACHE_CLASSES_OFFSET+8)(%ebp), %eax
cmpl %ecx, %eax
je .Ldone
cmpl LITERAL(0), %eax
jne .Lentry4
lock cmpxchg %ecx, (INLINE_CACHE_CLASSES_OFFSET+8)(%ebp)
jz .Ldone
jmp .Lentry3
.Lentry4:
movl (INLINE_CACHE_CLASSES_OFFSET+12)(%ebp), %eax
cmpl %ecx, %eax
je .Ldone
cmpl LITERAL(0), %eax
jne .Lentry5
lock cmpxchg %ecx, (INLINE_CACHE_CLASSES_OFFSET+12)(%ebp)
jz .Ldone
jmp .Lentry4
.Lentry5:
// Unconditionally store, the cache is megamorphic.
movl %ecx, (INLINE_CACHE_CLASSES_OFFSET+16)(%ebp)
.Ldone:
// Restore registers
movl %ecx, %eax
POP ecx
.Lret:
ret
END_FUNCTION art_quick_update_inline_cache
// TODO: implement these!
UNIMPLEMENTED art_quick_memcmp16
// On entry, the method is at the bottom of the stack.
DEFINE_FUNCTION art_quick_compile_optimized
SETUP_SAVE_EVERYTHING_FRAME ebx
mov FRAME_SIZE_SAVE_EVERYTHING(%esp), %eax // Fetch ArtMethod
sub LITERAL(8), %esp // Alignment padding
CFI_ADJUST_CFA_OFFSET(8)
pushl %fs:THREAD_SELF_OFFSET // pass Thread::Current()
CFI_ADJUST_CFA_OFFSET(4)
pushl %eax
CFI_ADJUST_CFA_OFFSET(4)
call SYMBOL(artCompileOptimized) // (ArtMethod*, Thread*)
addl LITERAL(16), %esp // Pop arguments.
CFI_ADJUST_CFA_OFFSET(-16)
RESTORE_SAVE_EVERYTHING_FRAME
ret
END_FUNCTION art_quick_compile_optimized
DEFINE_FUNCTION art_quick_method_entry_hook
SETUP_SAVE_EVERYTHING_FRAME edx
mov FRAME_SIZE_SAVE_EVERYTHING(%esp), %eax // Fetch ArtMethod
subl LITERAL(8), %esp
CFI_ADJUST_CFA_OFFSET(8)
pushl %fs:THREAD_SELF_OFFSET // Pass Thread::Current().
CFI_ADJUST_CFA_OFFSET(4)
pushl %eax // Pass Method*.
CFI_ADJUST_CFA_OFFSET(4)
call SYMBOL(artMethodEntryHook) // (Method*, Thread*)
addl LITERAL(16), %esp // Pop arguments.
CFI_ADJUST_CFA_OFFSET(-16)
RESTORE_SAVE_EVERYTHING_FRAME
ret
END_FUNCTION art_quick_method_entry_hook
DEFINE_FUNCTION art_quick_method_exit_hook
SETUP_SAVE_EVERYTHING_FRAME ebx
mov FRAME_SIZE_SAVE_EVERYTHING(%esp), %ebx // Remember ArtMethod*
subl LITERAL(8), %esp // Align stack.
CFI_ADJUST_CFA_OFFSET(8)
PUSH_ARG edx // Save gpr return value. edx and eax need to be together
// which isn't the case in kSaveEverything frame.
PUSH_ARG eax
movl %esp, %edx // Get pointer to gpr_result
leal 32(%esp), %eax // Get pointer to fpr_result, in kSaveEverything frame
PUSH_ARG eax // Pass fpr_result
PUSH_ARG edx // Pass gpr_result
PUSH_ARG ebx // Pass ArtMethod*
pushl %fs:THREAD_SELF_OFFSET // Pass Thread::Current.
CFI_ADJUST_CFA_OFFSET(4)
call SYMBOL(artMethodExitHook) // (Thread*, ArtMethod*, gpr_result*, fpr_result*)
// Return result could have been changed if it's a reference.
movl 16(%esp), %ecx
movl %ecx, (80+32)(%esp)
addl LITERAL(32), %esp // Pop arguments and grp_result.
CFI_ADJUST_CFA_OFFSET(-32)
cmpl LITERAL(1), %eax // Check if we returned error.
CFI_REMEMBER_STATE
je .Ldo_deliver_instrumentation_exception_exit
// Normal return.
RESTORE_SAVE_EVERYTHING_FRAME
ret
.Ldo_deliver_instrumentation_exception_exit:
CFI_RESTORE_STATE_AND_DEF_CFA esp, FRAME_SIZE_SAVE_EVERYTHING
DELIVER_PENDING_EXCEPTION_FRAME_READY
END_FUNCTION art_quick_method_exit_hook
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