reactos/include/reactos/asm.h

   1 /*
   2  * COPYRIGHT:       See COPYING in the top level directory
   3  * PROJECT:         ReactOS Kernel
   4  * FILE:            ntoskrnl/include/amd64/asmmacro.S
   5  * PURPOSE:         ASM macros for for GAS and MASM/ML64
   6  * PROGRAMMERS:     Timo Kreuzer (timo.kreuzer@reactos.org)
   7  */
   8
   9 #ifdef _MSC_VER
  10
  11 /* Allow ".name" identifiers */
  12 OPTION DOTNAME
  13
  14 /* Hex numbers need to be in 01ABh format */
  15 #define HEX(x) 0##x##h
  16
  17 /* MASM/ML doesn't want explicit [rip] addressing */
  18 #define RIP(address) address
  19
  20 /* Due to MASM's reverse syntax, we are forced to use a precompiler macro */
  21 #define MACRO(name, ...) name MACRO __VA_ARGS__
  22
  23 /* To avoid reverse syntax we provide a new macro .PROC, replacing PROC... */
  24 .PROC MACRO namex
  25     namex PROC FRAME
  26 ENDM
  27
  28 /* ... and .ENDP, replacing ENDP */
  29 .ENDP MACRO name
  30     name ENDP
  31 ENDM
  32
  33 /* MASM doesn't have an ASCIIZ macro */
  34 .ASCIIZ MACRO text
  35     DB text, 0
  36 ENDM
  37
  38 /* We need this to distinguish repeat from macros */
  39 #define ENDR ENDM
  40
  41 #else /***********************************************************************/
  42
  43 /* Force intel syntax */
  44 .intel_syntax noprefix
  45 .code64
  46
  47 /* Hex numbers need to be in 0x1AB format */
  48 #define HEX(x) 0x##x
  49
  50 /* GAS needs explicit [rip] addressing */
  51 #define RIP(address) address##[rip]
  52
  53 /* Due to MASM's reverse syntax, we are forced to use a precompiler macro */
  54 #define MACRO(name, ...) .MACRO name, __VA_ARGS__
  55
  56 /* To avoid reverse syntax we provide a new macro .PROC, replacing PROC... */
  57 .macro .PROC name
  58     .func \name
  59     \name:
  60     .cfi_startproc
  61     .equ cfa_current_offset, -8
  62 .endm
  63
  64 /* ... and .ENDP, replacing ENDP */
  65 .macro .ENDP name
  66     .cfi_endproc
  67     .endfunc
  68 .endm
  69
  70 /* MASM compatible PUBLIC */
  71 #define PUBLIC .global
  72
  73 /* MASM compatible ALIGN */
  74 #define ALIGN .align
  75
  76 /* MASM compatible REPEAT, additional ENDR */
  77 #define REPEAT .rept
  78 #define ENDR .endr
  79
  80
  81 /* Macros for x64 stack unwind OPs */
  82
  83 .macro .allocstack size
  84     .cfi_adjust_cfa_offset \size
  85     .set cfa_current_offset, cfa_current_offset - \size
  86 .endm
  87
  88 .macro .pushframe code
  89     .if (\code == 0)
  90         .cfi_adjust_cfa_offset 0x28
  91         .set cfa_current_offset, cfa_current_offset - 0x28
  92     .else
  93         .cfi_adjust_cfa_offset 0x30
  94         .set cfa_current_offset, cfa_current_offset - 0x30
  95     .endif
  96 .endm
  97
  98 .macro .pushreg reg
  99     .cfi_adjust_cfa_offset 8
 100     .equ cfa_current_offset, cfa_current_offset - 8
 101     .cfi_offset \reg, cfa_current_offset
 102 .endm
 103
 104 .macro .savereg reg, offset
 105     // checkme!!!
 106     .cfi_offset \reg, \offset
 107 .endm
 108
 109 .macro .savexmm128 reg, offset
 110     // checkme!!!
 111     .cfi_offset \reg, \offset
 112 .endm
 113
 114 .macro .setframe reg, offset
 115     .cfi_def_cfa reg, \offset
 116     .equ cfa_current_offset, \offset
 117 .endm
 118
 119 .macro .endprolog
 120 .endm
 121
 122 .macro UNIMPLEMENTED2 file, line, func
 123     jmp 3f
 124     .equ expr, 12
 125 1:  .asciz "\func"
 126 2:  .asciz "\file"
 127 3:
 128     sub rsp, 0x20
 129     lea rcx, _MsgUnimplemented[rip]
 130     lea rdx, 1b[rip]
 131     lea r8, 2b[rip]
 132     mov r9, \line
 133     call _DbgPrint
 134     add rsp, 0x20
 135 .endm
 136 #define UNIMPLEMENTED UNIMPLEMENTED2 __FILE__, __LINE__,
 137
 138 /* MASM/ML uses ".if" for runtime conditionals, and "if" for compile time
 139    conditionals. We therefore use "if", too. .if shouldn't be used at all */
 140 #define if .if
 141 #define endif .endif
 142
 143 #endif