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 /* Macro values need to be marked */
  18 #define VAL(x) x
  19
  20 /* MASM/ML doesn't want explicit [rip] addressing */
  21 #define RIP(address) [address]
  22
  23 /* Due to MASM's reverse syntax, we are forced to use a precompiler macro */
  24 #define MACRO(name, ...) name MACRO __VA_ARGS__
  25
  26 /* To avoid reverse syntax we provide a new macro .PROC, replacing PROC... */
  27 .PROC MACRO namex
  28     namex PROC FRAME
  29 ENDM
  30
  31 /* ... and .ENDP, replacing ENDP */
  32 .ENDP MACRO name
  33     name ENDP
  34 ENDM
  35
  36 /* MASM doesn't have an ASCII macro */
  37 .ASCII MACRO text
  38     DB text
  39 ENDM
  40
  41 /* MASM doesn't have an ASCIZ macro */
  42 .ASCIZ MACRO text
  43     DB text, 0
  44 ENDM
  45
  46 /* We need this to distinguish repeat from macros */
  47 #define ENDR ENDM
  48
  49 #else /***********************************************************************/
  50
  51 /* Force intel syntax */
  52 .intel_syntax noprefix
  53 .code64
  54
  55 .altmacro
  56
  57 /* Hex numbers need to be in 0x1AB format */
  58 #define HEX(x) 0x##x
  59
  60 /* Macro values need to be marked */
  61 #define VAL(x) \x
  62
  63 /* GAS needs explicit [rip] addressing */
  64 #define RIP(address) address##[rip]
  65
  66 /* Due to MASM's reverse syntax, we are forced to use a precompiler macro */
  67 #define MACRO(...) .macro __VA_ARGS__
  68 #define ENDM .endm
  69
  70 /* To avoid reverse syntax we provide a new macro .PROC, replacing PROC... */
  71 .macro .PROC name
  72     .func \name
  73     \name:
  74     .cfi_startproc
  75     .equ cfa_current_offset, -8
  76 .endm
  77
  78 /* ... and .ENDP, replacing ENDP */
  79 .macro .ENDP name
  80     .cfi_endproc
  81     .endfunc
  82 .endm
  83
  84 /* MASM compatible PUBLIC */
  85 #define PUBLIC .global
  86
  87 /* MASM compatible ALIGN */
  88 #define ALIGN .align
  89
  90 /* MASM compatible REPEAT, additional ENDR */
  91 #define REPEAT .rept
  92 #define ENDR .endr
  93
  94 /* MASM compatible EXTERN */
  95 .macro EXTERN name
  96 .endm
  97
  98 /* MASM needs an END tag */
  99 #define END
 100
 101 /* Macros for x64 stack unwind OPs */
 102
 103 .macro .allocstack size
 104     .cfi_adjust_cfa_offset \size
 105     .set cfa_current_offset, cfa_current_offset - \size
 106 .endm
 107
 108 code = 1
 109 .macro .pushframe param=0
 110     .if (\param)
 111         .cfi_adjust_cfa_offset 0x30
 112         .set cfa_current_offset, cfa_current_offset - 0x30
 113     .else
 114         .cfi_adjust_cfa_offset 0x28
 115         .set cfa_current_offset, cfa_current_offset - 0x28
 116     .endif
 117 .endm
 118
 119 .macro .pushreg reg
 120     .cfi_adjust_cfa_offset 8
 121     .equ cfa_current_offset, cfa_current_offset - 8
 122     .cfi_offset \reg, cfa_current_offset
 123 .endm
 124
 125 .macro .savereg reg, offset
 126     // checkme!!!
 127     .cfi_offset \reg, \offset
 128 .endm
 129
 130 .macro .savexmm128 reg, offset
 131     // checkme!!!
 132     .cfi_offset \reg, \offset
 133 .endm
 134
 135 .macro .setframe reg, offset
 136     .cfi_def_cfa reg, \offset
 137     .equ cfa_current_offset, \offset
 138 .endm
 139
 140 .macro .endprolog
 141 .endm
 142
 143 // Note the file1. This is a hack, as "\file" doesn't work with __FILE__, when
 144 // .altmacro is specified.
 145 .macro UNIMPLEMENTED2 file1, line, func
 146
 147     jmp 3f
 148 1:  .asciz "\func"
 149 2:  .asciz "\file"
 150 3:
 151     sub rsp, 0x20
 152     lea rcx, _MsgUnimplemented[rip]
 153     lea rdx, 1b[rip]
 154     lea r8, 2b[rip]
 155     mov r9, \line
 156     call _DbgPrint
 157     add rsp, 0x20
 158 .endm
 159 #define UNIMPLEMENTED UNIMPLEMENTED2 __FILE__, __LINE__,
 160
 161 /* MASM/ML uses ".if" for runtime conditionals, and "if" for compile time
 162    conditionals. We therefore use "if", too. .if shouldn't be used at all */
 163 #define if .if
 164 #define endif .endif
 165
 166 #endif