1//===-- orc_rt_macho_tlv.x86-64.s -------------------------------*- ASM -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file is a part of the ORC runtime support library.
10//
11//===----------------------------------------------------------------------===//
12
13// The content of this file is x86_64-only
14#if defined(__x86_64__)
15
16// Save all GRPS except %rsp.
17// This value is also subtracted from %rsp below, despite the fact that %rbp
18// has already been pushed, because we need %rsp to stay 16-byte aligned.
19#define GPR_SAVE_SPACE_SIZE 15 * 8
20#define FXSAVE64_SAVE_SPACE_SIZE 512
21#define REGISTER_SAVE_SPACE_SIZE \
22 GPR_SAVE_SPACE_SIZE + FXSAVE64_SAVE_SPACE_SIZE
23
24 .text
25
26 // returns address of TLV in %rax, all other registers preserved
27 .globl __orc_rt_sysv_reenter
28__orc_rt_sysv_reenter:
29 pushq %rbp
30 movq %rsp, %rbp
31 subq $REGISTER_SAVE_SPACE_SIZE, %rsp
32 movq %rax, -8(%rbp)
33 movq %rbx, -16(%rbp)
34 movq %rcx, -24(%rbp)
35 movq %rdx, -32(%rbp)
36 movq %rsi, -40(%rbp)
37 movq %rdi, -48(%rbp)
38 movq %r8, -56(%rbp)
39 movq %r9, -64(%rbp)
40 movq %r10, -72(%rbp)
41 movq %r11, -80(%rbp)
42 movq %r12, -88(%rbp)
43 movq %r13, -96(%rbp)
44 movq %r14, -104(%rbp)
45 movq %r15, -112(%rbp)
46 fxsave64 (%rsp)
47 movq 8(%rbp), %rdi
48
49 // Load return address and subtract five from it (on the assumption
50 // that it's a call instruction).
51 subq $5, %rdi
52
53 // Call __orc_rt_resolve to look up the implementation corresponding to
54 // the calling stub, then store this in x17 (which we'll return to
55 // below).
56#if !defined(__APPLE__)
57 call __orc_rt_resolve
58#else
59 call ___orc_rt_resolve
60#endif
61 movq %rax, 8(%rbp)
62 fxrstor64 (%rsp)
63 movq -112(%rbp), %r15
64 movq -104(%rbp), %r14
65 movq -96(%rbp), %r13
66 movq -88(%rbp), %r12
67 movq -80(%rbp), %r11
68 movq -72(%rbp), %r10
69 movq -64(%rbp), %r9
70 movq -56(%rbp), %r8
71 movq -48(%rbp), %rdi
72 movq -40(%rbp), %rsi
73 movq -32(%rbp), %rdx
74 movq -24(%rbp), %rcx
75 movq -16(%rbp), %rbx
76 movq -8(%rbp), %rax
77 addq $REGISTER_SAVE_SPACE_SIZE, %rsp
78 popq %rbp
79 ret
80
81#endif // defined(__x86_64__)
82