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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.
.syntax unified
.thumb
#include <AsmOffsets.inc> // generated by the build from AsmOffsets.cpp
#include <unixasmmacros.inc>
#define POINTER_SIZE 4
//
// RhCommonStub
//
NESTED_ENTRY RhCommonStub, _TEXT, NoHandler
// Custom calling convention:
// red zone has pointer to the current thunk's data block (data contains 2 pointer values: context + target pointers)
// Copy red zone value into r12 so that the PROLOG_PUSH doesn't destroy it
ldr r12, [sp, #-4]
PROLOG_PUSH "{r0-r4, lr}"
PROLOG_VPUSH {d0-d7} // Capture the floating point argument registers
mov r4, r12
INLINE_GET_TLS_VAR tls_thunkData
// r0 = base address of TLS data
// r4 = address of context cell in thunk's data
ldr r12, [r4]
str r12, [r0]
// Now load the target address and jump to it.
ldr r12, [r4, #POINTER_SIZE]
EPILOG_VPOP {d0-d7}
EPILOG_POP "{r0-r4, lr}"
bx r12
NESTED_END RhCommonStub, _TEXT
//
// IntPtr RhGetCommonStubAddress()
//
LEAF_ENTRY RhGetCommonStubAddress, _TEXT
ldr r0, =C_FUNC(RhCommonStub)
bx lr
LEAF_END RhGetCommonStubAddress, _TEXT
//
// IntPtr RhGetCurrentThunkContext()
//
LEAF_ENTRY RhGetCurrentThunkContext, _TEXT
PROLOG_PUSH "{r12, lr}"
INLINE_GET_TLS_VAR tls_thunkData
ldr r0, [r0]
EPILOG_POP "{r12, pc}"
LEAF_END RhGetCurrentThunkContext, _TEXT
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