DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (5b81998bb7ab)

VCS Links

Line Code
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 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137
/ -*- Mode: C++/ tab-width: 4/ indent-tabs-mode: nil/ c-basic-offset: 4 -*-
/ This Source Code Form is subject to the terms of the Mozilla Public
/ License, v. 2.0. If a copy of the MPL was not distributed with this
/ file, You can obtain one at http://mozilla.org/MPL/2.0/.

.text

/ JSBool JaegerTrampoline(JSContext *cx, StackFrame *fp, void *code,
/                         Value *stackLimit)
.global JaegerTrampoline
.type   JaegerTrampoline, @function
JaegerTrampoline:
    /* Prologue. */
    pushq %rbp
    movq %rsp, %rbp
    /* Save non-volatile registers. */
    pushq %r12
    pushq %r13
    pushq %r14
    pushq %r15
    pushq %rbx

    /* Load mask registers. */
    movq $0xFFFF800000000000, %r13
    movq $0x00007FFFFFFFFFFF, %r14

    /* Build the JIT frame.
     * rdi = cx
     * rsi = fp
     * rcx = inlineCallCount
     * fp must go into rbx
     */
    pushq $0x0        /* stubRejoin */
    pushq %rsi        /* entryncode */
    pushq %rsi        /* entryfp */
    pushq %rcx        /* inlineCallCount */
    pushq %rdi        /* cx */
    pushq %rsi        /* fp */
    movq  %rsi, %rbx

    /* Space for the rest of the VMFrame. */
    subq  $0x28, %rsp

    /* This is actually part of the VMFrame. */
    pushq %r8

    /* Set cx->regs and set the active frame. Save rdx and align frame in one. */
    pushq %rdx
    movq  %rsp, %rdi
    call PushActiveVMFrame

    /* Jump into into the JIT'd code. */
    jmp *0(%rsp)
.size   JaegerTrampoline, . - JaegerTrampoline

/ void JaegerTrampolineReturn()
.global JaegerTrampolineReturn
.type   JaegerTrampolineReturn, @function
JaegerTrampolineReturn:
    or   %rdi, %rsi
    movq %rsx, 0x30(%rbx)
    movq %rsp, %rdi
    call PopActiveVMFrame

    addq $0x68, %rsp
    popq %rbx
    popq %r15
    popq %r14
    popq %r13
    popq %r12
    popq %rbp
    movq $1, %rax
    ret
.size   JaegerTrampolineReturn, . - JaegerTrampolineReturn


/ void *JaegerThrowpoline(js::VMFrame *vmFrame)
.global JaegerThrowpoline
.type   JaegerThrowpoline, @function
JaegerThrowpoline:
    movq %rsp, %rdi
    call js_InternalThrow
    testq %rax, %rax
    je   throwpoline_exit
    jmp  *%rax
  throwpoline_exit:
    movq %rsp, %rdi
    call PopActiveVMFrame
    addq $0x68, %rsp
    popq %rbx
    popq %r15
    popq %r14
    popq %r13
    popq %r12
    popq %rbp
    xorq %rax,%rax
    ret
.size   JaegerThrowpoline, . - JaegerThrowpoline

/ void JaegerInterpoline()
.global JaegerInterpoline
.type   JaegerInterpoline, @function
JaegerInterpoline:
    movq %rsp, %rcx
    movq %rax, %rdx
    call js_InternalInterpret
    movq 0x38(%rsp), %rbx             /* Load frame */
    movq 0x30(%rbx), %rsi             /* Load rval payload */
    and %r14, %rsi                    /* Mask rval payload */
    movq 0x30(%rbx), %rdi             /* Load rval type */
    and %r13, %rdi                    /* Mask rval type */
    movq 0x18(%rsp), %rcx             /* Load scratch -> argc */
    testq %rax, %rax
    je   interpoline_exit
    jmp  *%rax
  interpoline_exit:
    movq %rsp, %rdi
    call PopActiveVMFrame
    addq $0x68, %rsp
    popq %rbx
    popq %r15
    popq %r14
    popq %r13
    popq %r12
    popq %rbp
    xorq %rax,%rax
    ret
.size   JaegerInterpoline, . - JaegerInterpoline

/ void JaegerInterpolineScripted()
.global JaegerInterpolineScripted
.type   JaegerInterpolineScripted, @function
JaegerInterpolineScripted:
    movq 0x20(%rbx), %rbx             /* load prev */
    movq %rbx, 0x38(%rsp)
    jmp JaegerInterpoline
.size   JaegerInterpolineScripted, . - JaegerInterpolineScripted