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