derek.holloway
7502bf64a4
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83 lines
3.1 KiB
ArmAsm
83 lines
3.1 KiB
ArmAsm
//===-- orc_rt_macho_tlv.x86-64.s -------------------------------*- ASM -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of the ORC runtime support library.
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//
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//===----------------------------------------------------------------------===//
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// The content of this file is x86_64-only
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#if defined(__x86_64__)
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.att_syntax
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// Save all GRPS except %rsp.
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// This value is also subtracted from %rsp below, despite the fact that %rbp
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// has already been pushed, because we need %rsp to stay 16-byte aligned.
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#define GPR_SAVE_SPACE_SIZE 15 * 8
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#define FXSAVE64_SAVE_SPACE_SIZE 512
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#define REGISTER_SAVE_SPACE_SIZE \
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GPR_SAVE_SPACE_SIZE + FXSAVE64_SAVE_SPACE_SIZE
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.text
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// returns address of TLV in %rax, all other registers preserved
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.globl __orc_rt_sysv_reenter
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__orc_rt_sysv_reenter:
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pushq %rbp
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movq %rsp, %rbp
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subq $REGISTER_SAVE_SPACE_SIZE, %rsp
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movq %rax, -8(%rbp)
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movq %rbx, -16(%rbp)
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movq %rcx, -24(%rbp)
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movq %rdx, -32(%rbp)
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movq %rsi, -40(%rbp)
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movq %rdi, -48(%rbp)
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movq %r8, -56(%rbp)
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movq %r9, -64(%rbp)
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movq %r10, -72(%rbp)
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movq %r11, -80(%rbp)
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movq %r12, -88(%rbp)
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movq %r13, -96(%rbp)
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movq %r14, -104(%rbp)
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movq %r15, -112(%rbp)
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fxsave64 (%rsp)
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movq 8(%rbp), %rdi
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// Load return address and subtract five from it (on the assumption
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// that it's a call instruction).
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subq $5, %rdi
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// Call __orc_rt_resolve to look up the implementation corresponding to
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// the calling stub, then store this in x17 (which we'll return to
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// below).
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#if !defined(__APPLE__)
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call __orc_rt_resolve
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#else
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call ___orc_rt_resolve
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#endif
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movq %rax, 8(%rbp)
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fxrstor64 (%rsp)
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movq -112(%rbp), %r15
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movq -104(%rbp), %r14
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movq -96(%rbp), %r13
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movq -88(%rbp), %r12
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movq -80(%rbp), %r11
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movq -72(%rbp), %r10
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movq -64(%rbp), %r9
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movq -56(%rbp), %r8
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movq -48(%rbp), %rdi
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movq -40(%rbp), %rsi
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movq -32(%rbp), %rdx
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movq -24(%rbp), %rcx
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movq -16(%rbp), %rbx
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movq -8(%rbp), %rax
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addq $REGISTER_SAVE_SPACE_SIZE, %rsp
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popq %rbp
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ret
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#endif // defined(__x86_64__)
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