gfxapi/templates/opengl32_x64.asm.tmpl

{{/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */}}

{{Include "cpp_common.tmpl"}}
{{Include "opengl32_exports.tmpl"}}
{{$ | Macro "opengl32_x64.asm" | Reflow 4 | Write "opengl32_x64.asm"}}

{{/*
-------------------------------------------------------------------------------
  Entry point.
-------------------------------------------------------------------------------
*/}}
{{define "opengl32_x64.asm"}}
; Copyright (C) 2015 The Android Open Source Project
;
; Licensed under the Apache License, Version 2.0 (the "License");
; you may not use this file except in compliance with the License.
; You may obtain a copy of the License at
;
;      http://www.apache.org/licenses/LICENSE-2.0
;
; Unless required by applicable law or agreed to in writing, software
; distributed under the License is distributed on an "AS IS" BASIS,
; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
; See the License for the specific language governing permissions and
; limitations under the License.
¶
; This masm exposes trampoline functions for OpenGL 1.1 and WGL functions that
; are expected to be exposed by OpenGL32.dll but not declared by the API files.
¶
; Lazy resolve all functions, then trampoline to the resolved address
TRAMPOLINE macro FUNC, REAL»
    local skip
    public FUNC
    extern REAL:proc
¶
«FUNC PROC»
    mov eax, resolved
    cmp eax, 0
    jnz skip
    ; Function are not resolved, resolve now...
¶
    ; Preserve arguments stored in registers (ecx, edx, r8 and r9)
    push rcx
    push rdx
    push r8
    push r9
¶
    ; give resolve() the necessary 32 byte 'shadow space', and call resolve
    sub rsp, 28h
    call resolve
    add rsp, 28h
¶
    ; Reload argument registers
    pop r9
    pop r8
    pop rdx
    pop rcx
«skip:»
    mov rax, [REAL]
    mov rax, [rax]
    jmp rax
«FUNC ENDP»
    endm
«
¶
extern resolve:proc
extern resolved:SDWORD
¶
.CODE
  {{/* This is the list of functions that OpenGL32.dll needs to export. */}}
  {{$opengl32_exports := Strings (Macro "OpenGL32Exports") | SplitOn "\n"}}

  {{/* This is the list of functions that the spy exports. */}}
  {{$api_exports := (ForEach (AllCommands $) "CmdName") | Strings "wglGetProcAddress"}}

  {{/* This is list of functions we need to create trampolines for. */}}
  {{$trampolines := $opengl32_exports | FilterOut $api_exports}}

  {{range $f := $trampolines}}
    TRAMPOLINE {{$f}}, real__{{$f}}
  {{end}}
end
¶
{{end}}