зеркало из https://github.com/mozilla/gecko-dev.git
50 строки
1.7 KiB
ArmAsm
50 строки
1.7 KiB
ArmAsm
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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.global SharedStub
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/*
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in the frame for the function that called SharedStub are the
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rest of the parameters we need
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*/
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SharedStub:
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! we don't create a new frame yet, but work within the frame of the calling
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! function to give ourselves the other parameters we want
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mov %o0, %o1 ! shuffle the index up to 2nd place
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mov %i0, %o0 ! the original 'this'
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add %fp, 72, %o2 ! previous stack top adjusted to the first argument slot (beyond 'this')
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! save off the original incoming parameters that arrived in
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! registers, the ABI guarantees the space for us to do this
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st %i1, [%fp + 72]
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st %i2, [%fp + 76]
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st %i3, [%fp + 80]
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st %i4, [%fp + 84]
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st %i5, [%fp + 88]
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! now we can build our own stack frame
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save %sp,-(64 + 32),%sp ! room for the register window and
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! struct pointer, rounded up to 0 % 32
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! our function now appears to have been called
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! as SharedStub(nsISupports* that, uint32_t index, uint32_t* args)
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! so we can just copy these through
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mov %i0, %o0
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mov %i1, %o1
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mov %i2, %o2
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call PrepareAndDispatch
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nop
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mov %o0,%i0 ! propagate return value
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b .LL1
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nop
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.LL1:
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ret
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restore
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.size SharedStub, .-SharedStub
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.type SharedStub, #function
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