File: GC_Shim_x86_64.S

package info (click to toggle)
chromium 139.0.7258.127-1
  • links: PTS, VCS
  • area: main
  • in suites:
  • size: 6,122,068 kB
  • sloc: cpp: 35,100,771; ansic: 7,163,530; javascript: 4,103,002; python: 1,436,920; asm: 946,517; xml: 746,709; pascal: 187,653; perl: 88,691; sh: 88,436; objc: 79,953; sql: 51,488; cs: 44,583; fortran: 24,137; makefile: 22,147; tcl: 15,277; php: 13,980; yacc: 8,984; ruby: 7,485; awk: 3,720; lisp: 3,096; lex: 1,327; ada: 727; jsp: 228; sed: 36
file content (34 lines) | stat: -rw-r--r-- 854 bytes parent folder | download | duplicates (11) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
 
// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
.text

// This function is assumed to be called only from within InitGC. The value
// pointed to by InitGCs frame pointer is loaded as the stack sentinal value.
.globl InitTopOfStack
InitTopOfStack:
    mov (%rbp), %rdi
    mov %rdi, (TopOfStack)
    ret

.extern StackWalkAndMoveObjects
.globl GC

// We place the frame pointer in the first arg slot register and call
// StackWalkAndMoveObjects. The function epilogue needs to be hand-written
// afterwards so as to not corrupt the stack.
GC:
    pushq %rbp
    movq %rsp, %rbp
    subq $8, %rsp
    mov %rbp, %rdi
    call StackWalkAndMoveObjects
    addq $8, %rsp
    popq %rbp
    ret

.bss
.globl TopOfStack
TopOfStack:
    .quad 0
    .size TopOfStack, 8