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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
.intel_syntax noprefix
#include <AsmOffsets.inc> // generated by the build from AsmOffsets.cpp
#include <unixasmmacros.inc>
// Allocate non-array, non-finalizable object. If the allocation doesn't fit into the current thread's
// allocation context then automatically fallback to the slow allocation path.
// RDI == EEType
NESTED_ENTRY RhpNewFast, _TEXT, NoHandler
push_nonvol_reg rbx
mov rbx, rdi
// rax = GetThread()
INLINE_GETTHREAD
//
// rbx contains EEType pointer
//
mov edx, [rbx + OFFSETOF__EEType__m_uBaseSize]
//
// rax: Thread pointer
// rbx: EEType pointer
// rdx: base size
//
mov rsi, [rax + OFFSETOF__Thread__m_alloc_context__alloc_ptr]
add rdx, rsi
cmp rdx, [rax + OFFSETOF__Thread__m_alloc_context__alloc_limit]
ja LOCAL_LABEL(RhpNewFast_RarePath)
// set the new alloc pointer
mov [rax + OFFSETOF__Thread__m_alloc_context__alloc_ptr], rdx
mov rax, rsi
// set the new object's EEType pointer
mov [rsi], rbx
.cfi_remember_state
pop_nonvol_reg rbx
ret
.cfi_restore_state
.cfi_def_cfa_offset 16 // workaround cfi_restore_state bug
LOCAL_LABEL(RhpNewFast_RarePath):
mov rdi, rbx // restore EEType
xor esi, esi
pop_nonvol_reg rbx
jmp C_FUNC(RhpNewObject)
NESTED_END RhpNewFast, _TEXT
// Allocate non-array object with finalizer
// RDI == EEType
LEAF_ENTRY RhpNewFinalizable, _TEXT
mov esi, GC_ALLOC_FINALIZE
jmp C_FUNC(RhpNewObject)
LEAF_END RhpNewFinalizable, _TEXT
// Allocate non-array object
// RDI == EEType
// ESI == alloc flags
NESTED_ENTRY RhpNewObject, _TEXT, NoHandler
PUSH_COOP_PINVOKE_FRAME rcx
END_PROLOGUE
// RCX: transition frame
// Preserve the EEType in RBX
mov rbx, rdi
mov edx, [rdi + OFFSETOF__EEType__m_uBaseSize] // cbSize
// Call the rest of the allocation helper.
// void* RhpGcAlloc(EEType *pEEType, UInt32 uFlags, UIntNative cbSize, void * pTransitionFrame)
call C_FUNC(RhpGcAlloc)
// Set the new object's EEType pointer on success.
test rax, rax
jz LOCAL_LABEL(NewOutOfMemory)
mov [rax + OFFSETOF__Object__m_pEEType], rbx
// If the object is bigger than RH_LARGE_OBJECT_SIZE, we must publish it to the BGC
mov esi, [rbx + OFFSETOF__EEType__m_uBaseSize]
.att_syntax
cmp $RH_LARGE_OBJECT_SIZE, %rsi
.intel_syntax noprefix
jb LOCAL_LABEL(New_SkipPublish)
mov rdi, rax // rdi: object
// rsi: already contains object size
call C_FUNC(RhpPublishObject) // rax: this function returns the object that was passed-in
LOCAL_LABEL(New_SkipPublish):
.cfi_remember_state
POP_COOP_PINVOKE_FRAME
ret
.cfi_restore_state
.cfi_def_cfa_offset 96 // workaround cfi_restore_state bug
LOCAL_LABEL(NewOutOfMemory):
// This is the OOM failure path. We're going to tail-call to a managed helper that will throw
// an out of memory exception that the caller of this allocator understands.
mov rdi, rbx // EEType pointer
xor esi, esi // Indicate that we should throw OOM.
POP_COOP_PINVOKE_FRAME
jmp C_FUNC(RhExceptionHandling_FailedAllocation)
NESTED_END RhpNewObject, _TEXT
// Allocate a string.
// RDI == EEType
// ESI == character/element count
NESTED_ENTRY RhNewString, _TEXT, NoHandler
// we want to limit the element count to the non-negative 32-bit int range
cmp rsi, 07fffffffh
ja LOCAL_LABEL(StringSizeOverflow)
push_nonvol_reg rbx
push_nonvol_reg r12
push_register rcx // padding
mov rbx, rdi // save EEType
mov r12, rsi // save element count
// rax = GetThread()
INLINE_GETTHREAD
mov rcx, rax // rcx = Thread*
// Compute overall allocation size (align(base size + (element size * elements), 8)).
lea rax, [r12 * STRING_COMPONENT_SIZE + STRING_BASE_SIZE + 7]
and rax, -8
// rax == string size
// rbx == EEType
// rcx == Thread*
// r12 == element count
mov rdx, rax
add rax, [rcx + OFFSETOF__Thread__m_alloc_context__alloc_ptr]
jc LOCAL_LABEL(RhNewString_RarePath)
// rax == new alloc ptr
// rbx == EEType
// rcx == Thread*
// rdx == string size
// r12 == element count
cmp rax, [rcx + OFFSETOF__Thread__m_alloc_context__alloc_limit]
ja LOCAL_LABEL(RhNewString_RarePath)
mov [rcx + OFFSETOF__Thread__m_alloc_context__alloc_ptr], rax
// calc the new object pointer
sub rax, rdx
mov [rax + OFFSETOF__Object__m_pEEType], rbx
mov [rax + OFFSETOF__String__m_Length], r12d
.cfi_remember_state
pop_register rcx // padding
pop_nonvol_reg r12
pop_nonvol_reg rbx
ret
.cfi_restore_state
.cfi_def_cfa_offset 32 // workaround cfi_restore_state bug
LOCAL_LABEL(RhNewString_RarePath):
mov rdi, rbx // restore EEType
mov rsi, r12 // restore element count
// passing string size in rdx
pop_register rcx // padding
pop_nonvol_reg r12
pop_nonvol_reg rbx
jmp C_FUNC(RhpNewArrayRare)
LOCAL_LABEL(StringSizeOverflow):
// We get here if the size of the final string object can't be represented as an unsigned
// 32-bit value. We're going to tail-call to a managed helper that will throw
// an OOM exception that the caller of this allocator understands.
// rdi holds EEType pointer already
xor esi, esi // Indicate that we should throw OOM.
jmp C_FUNC(RhExceptionHandling_FailedAllocation)
NESTED_END RhNewString, _TEXT
// Allocate one dimensional, zero based array (SZARRAY).
// RDI == EEType
// ESI == element count
NESTED_ENTRY RhpNewArray, _TEXT, NoHandler
// we want to limit the element count to the non-negative 32-bit int range
cmp rsi, 07fffffffh
ja LOCAL_LABEL(ArraySizeOverflow)
push_nonvol_reg rbx
push_nonvol_reg r12
push_register rcx // padding
mov rbx, rdi // save EEType
mov r12, rsi // save element count
// rax = GetThread()
INLINE_GETTHREAD
mov rcx, rax // rcx = Thread*
// Compute overall allocation size (align(base size + (element size * elements), 8)).
movzx eax, word ptr [rbx + OFFSETOF__EEType__m_usComponentSize]
mul r12
mov edx, [rbx + OFFSETOF__EEType__m_uBaseSize]
add rax, rdx
add rax, 7
and rax, -8
// rax == array size
// rbx == EEType
// rcx == Thread*
// r12 == element count
mov rdx, rax
add rax, [rcx + OFFSETOF__Thread__m_alloc_context__alloc_ptr]
jc LOCAL_LABEL(RhpNewArray_RarePath)
// rax == new alloc ptr
// rbx == EEType
// rcx == Thread*
// rdx == array size
// r12 == element count
cmp rax, [rcx + OFFSETOF__Thread__m_alloc_context__alloc_limit]
ja LOCAL_LABEL(RhpNewArray_RarePath)
mov [rcx + OFFSETOF__Thread__m_alloc_context__alloc_ptr], rax
// calc the new object pointer
sub rax, rdx
mov [rax + OFFSETOF__Object__m_pEEType], rbx
mov [rax + OFFSETOF__Array__m_Length], r12d
.cfi_remember_state
pop_register rcx // padding
pop_nonvol_reg r12
pop_nonvol_reg rbx
ret
.cfi_restore_state
.cfi_def_cfa_offset 32 // workaround cfi_restore_state bug
LOCAL_LABEL(RhpNewArray_RarePath):
mov rdi, rbx // restore EEType
mov rsi, r12 // restore element count
// passing array size in rdx
pop_register rcx // padding
pop_nonvol_reg r12
pop_nonvol_reg rbx
jmp C_FUNC(RhpNewArrayRare)
LOCAL_LABEL(ArraySizeOverflow):
// We get here if the size of the final array object can't be represented as an unsigned
// 32-bit value. We're going to tail-call to a managed helper that will throw
// an overflow exception that the caller of this allocator understands.
// rdi holds EEType pointer already
mov esi, 1 // Indicate that we should throw OverflowException
jmp C_FUNC(RhExceptionHandling_FailedAllocation)
NESTED_END RhpNewArray, _TEXT
NESTED_ENTRY RhpNewArrayRare, _TEXT, NoHandler
// rdi == EEType
// rsi == element count
// rdx == array size
PUSH_COOP_PINVOKE_FRAME rcx
END_PROLOGUE
// rcx: transition frame
// Preserve the EEType in RBX
mov rbx, rdi
// Preserve the element count in R12
mov r12, rsi
// Preserve the size in R13
mov r13, rdx
// passing EEType in rdi
xor rsi, rsi // uFlags
// pasing size in rdx
// pasing pTransitionFrame in rcx
// Call the rest of the allocation helper.
// void* RhpGcAlloc(EEType *pEEType, UInt32 uFlags, UIntNative cbSize, void * pTransitionFrame)
call C_FUNC(RhpGcAlloc)
// Set the new object's EEType pointer and length on success.
test rax, rax
jz LOCAL_LABEL(ArrayOutOfMemory)
mov [rax + OFFSETOF__Object__m_pEEType], rbx
mov [rax + OFFSETOF__Array__m_Length], r12d
// If the object is bigger than RH_LARGE_OBJECT_SIZE, we must publish it to the BGC
.att_syntax
cmp $RH_LARGE_OBJECT_SIZE, %r13
.intel_syntax noprefix
jb LOCAL_LABEL(NewArray_SkipPublish)
mov rdi, rax // rcx: object
mov rsi, r13 // rdx: object size
call C_FUNC(RhpPublishObject) // rax: this function returns the object that was passed-in
LOCAL_LABEL(NewArray_SkipPublish):
.cfi_remember_state
POP_COOP_PINVOKE_FRAME
ret
.cfi_restore_state
.cfi_def_cfa_offset 96 // workaround cfi_restore_state bug
LOCAL_LABEL(ArrayOutOfMemory):
// This is the OOM failure path. We're going to tail-call to a managed helper that will throw
// an out of memory exception that the caller of this allocator understands.
mov rdi, rbx // EEType pointer
xor esi, esi // Indicate that we should throw OOM.
POP_COOP_PINVOKE_FRAME
jmp C_FUNC(RhExceptionHandling_FailedAllocation)
NESTED_END RhpNewArrayRare, _TEXT
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