forked from OSchip/llvm-project
113 lines
2.7 KiB
ArmAsm
113 lines
2.7 KiB
ArmAsm
//===-- xray_trampoline_x86.s -----------------------------------*- ASM -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file is a part of XRay, a dynamic runtime instrumentation system.
|
|
//
|
|
// This implements the X86-specific assembler for the trampolines.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
.text
|
|
.file "xray_trampoline_x86.S"
|
|
.globl __xray_FunctionEntry
|
|
.align 16, 0x90
|
|
.type __xray_FunctionEntry,@function
|
|
|
|
__xray_FunctionEntry:
|
|
.cfi_startproc
|
|
// Save caller provided registers before doing any actual work.
|
|
pushq %rbp
|
|
.cfi_def_cfa_offset 16
|
|
subq $200, %rsp
|
|
movupd %xmm0, 184(%rsp)
|
|
movupd %xmm1, 168(%rsp)
|
|
movupd %xmm2, 152(%rsp)
|
|
movupd %xmm3, 136(%rsp)
|
|
movupd %xmm4, 120(%rsp)
|
|
movupd %xmm5, 104(%rsp)
|
|
movupd %xmm6, 88(%rsp)
|
|
movupd %xmm7, 72(%rsp)
|
|
movq %rdi, 64(%rsp)
|
|
movq %rax, 56(%rsp)
|
|
movq %rdx, 48(%rsp)
|
|
movq %rsi, 40(%rsp)
|
|
movq %rcx, 32(%rsp)
|
|
movq %r8, 24(%rsp)
|
|
movq %r9, 16(%rsp)
|
|
|
|
// de-mangled, that's __xray::XRayPatchedFunction, and we're doing an acquire
|
|
// load (on x86 is a normal mov instruction).
|
|
movq _ZN6__xray19XRayPatchedFunctionE(%rip), %rax
|
|
testq %rax, %rax
|
|
je .Ltmp0
|
|
|
|
// assume that %r10d has the function id.
|
|
movl %r10d, %edi
|
|
xor %esi,%esi
|
|
callq *%rax
|
|
.Ltmp0:
|
|
// restore the registers
|
|
movupd 184(%rsp), %xmm0
|
|
movupd 168(%rsp), %xmm1
|
|
movupd 152(%rsp), %xmm2
|
|
movupd 136(%rsp), %xmm3
|
|
movupd 120(%rsp), %xmm4
|
|
movupd 104(%rsp), %xmm5
|
|
movupd 88(%rsp) , %xmm6
|
|
movupd 72(%rsp) , %xmm7
|
|
movq 64(%rsp), %rdi
|
|
movq 56(%rsp), %rax
|
|
movq 48(%rsp), %rdx
|
|
movq 40(%rsp), %rsi
|
|
movq 32(%rsp), %rcx
|
|
movq 24(%rsp), %r8
|
|
movq 16(%rsp), %r9
|
|
addq $200, %rsp
|
|
popq %rbp
|
|
retq
|
|
.Ltmp1:
|
|
.size __xray_FunctionEntry, .Ltmp1-__xray_FunctionEntry
|
|
.cfi_endproc
|
|
|
|
.globl __xray_FunctionExit
|
|
.align 16, 0x90
|
|
.type __xray_FunctionExit,@function
|
|
__xray_FunctionExit:
|
|
.cfi_startproc
|
|
// Save the important registers first. Since we're assuming that this
|
|
// function is only jumped into, we only preserve the registers for
|
|
// returning.
|
|
pushq %rbp
|
|
.cfi_def_cfa_offset 16
|
|
subq $56, %rsp
|
|
.cfi_def_cfa_offset 32
|
|
movupd %xmm0, 40(%rsp)
|
|
movupd %xmm1, 24(%rsp)
|
|
movq %rax, 16(%rsp)
|
|
movq %rdx, 8(%rsp)
|
|
movq _ZN6__xray19XRayPatchedFunctionE(%rip), %rax
|
|
testq %rax,%rax
|
|
je .Ltmp2
|
|
|
|
movl %r10d, %edi
|
|
movl $1, %esi
|
|
callq *%rax
|
|
.Ltmp2:
|
|
// Restore the important registers.
|
|
movupd 40(%rsp), %xmm0
|
|
movupd 24(%rsp), %xmm1
|
|
movq 16(%rsp), %rax
|
|
movq 8(%rsp), %rdx
|
|
addq $56, %rsp
|
|
popq %rbp
|
|
retq
|
|
.Ltmp3:
|
|
.size __xray_FunctionExit, .Ltmp3-__xray_FunctionExit
|
|
.cfi_endproc
|