include/asm/asm.inc

   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 _USE_ML
  10
  11 /* Allow ".name" identifiers */
  12 OPTION DOTNAME
  13
  14 #ifdef _M_IX86
  15 .686P
  16 .XMM
  17 .MODEL FLAT
  18 ASSUME CS:NOTHING, DS:NOTHING, ES:NOTHING, FS:NOTHING, GS:NOTHING
  19 #endif
  20
  21 /* Hex numbers need to be in 01ABh format */
  22 #define HEX(x) 0##x##h
  23
  24 /* Macro values need to be marked */
  25 #define VAL(x) x
  26
  27 /* MASM/ML doesn't want explicit [rip] addressing */
  28 rip = 0
  29
  30 /* Due to MASM's reverse syntax, we are forced to use a precompiler macro */
  31 #define MACRO(name, ...) name MACRO __VA_ARGS__
  32
  33 /* To avoid reverse syntax we provide a new macro .PROC, replacing PROC... */
  34 .PROC MACRO name
  35     name PROC FRAME
  36     _name:
  37 ENDM
  38
  39 /* ... and .ENDP, replacing ENDP */
  40 .ENDP MACRO name
  41     name ENDP
  42 ENDM
  43
  44 /* MASM doesn't have an ASCII macro */
  45 .ASCII MACRO text
  46     DB text
  47 ENDM
  48
  49 /* MASM doesn't have an ASCIZ macro */
  50 .ASCIZ MACRO text
  51     DB text, 0
  52 ENDM
  53
  54 #define lgdt lgdt fword ptr ds:
  55
  56 #define lidt lidt fword ptr ds:
  57
  58 ljmp MACRO segment, offset
  59     DB 0
  60 ENDM
  61
  62 .code64 MACRO
  63     .code
  64 ENDM
  65
  66 .code32 MACRO
  67     .code
  68     .586P
  69 ENDM
  70
  71 .code16 MACRO
  72     ASSUME nothing
  73     .text16 SEGMENT use16
  74 ENDM
  75
  76 .endcode16 MACRO
  77     .text16 ENDS
  78 ENDM
  79
  80 .bss MACRO
  81     .DATA?
  82     ASSUME nothing
  83 ENDM
  84
  85 //.text MACRO
  86 //ENDM
  87
  88 .align MACRO alignment
  89     ALIGN alignment
  90 ENDM
  91
  92 .byte MACRO args:VARARG
  93     db args
  94 ENDM
  95
  96 .short MACRO args:VARARG
  97     dw args
  98 ENDM
  99
 100 .word MACRO args:VARARG
 101     dw args
 102 ENDM
 103
 104 .long MACRO args:VARARG
 105     dd args
 106 ENDM
 107
 108 .double MACRO args:VARARG
 109     dq args
 110 ENDM
 111
 112 .org MACRO value
 113     ORG value
 114 ENDM
 115
 116 .fill MACRO count, size, value
 117     REPEAT count
 118         if (size == 1)
 119             DB value
 120         elseif (size == 2)
 121             DW value
 122         elseif (size == 4)
 123             DD value
 124         else
 125         endif
 126     ENDM
 127 ENDM
 128
 129 .space MACRO count
 130     DB 0 DUP (count)
 131 ENDM
 132
 133 ljmp MACRO segment, offset
 134     DB 0EAh
 135     DD offset
 136     DW segment
 137 ENDM
 138
 139 ljmp16 MACRO segment, offset
 140     DB 0EAh
 141     DW offset
 142     DW segment
 143 ENDM
 144
 145 UNIMPLEMENTED MACRO name
 146 ENDM
 147
 148 /* We need this to distinguish repeat from macros */
 149 #define ENDR ENDM
 150
 151 #else /***********************************************************************/
 152
 153 /* Force intel syntax */
 154 .intel_syntax noprefix
 155
 156 .altmacro
 157
 158 /* Hex numbers need to be in 0x1AB format */
 159 #define HEX(y) 0x##y
 160
 161 /* Macro values need to be marked */
 162 #define VAL(x) \x
 163
 164 /* Due to MASM's reverse syntax, we are forced to use a precompiler macro */
 165 #define MACRO(...) .macro __VA_ARGS__
 166 #define ENDM .endm
 167
 168 /* To avoid reverse syntax we provide a new macro .PROC, replacing PROC... */
 169 .macro .PROC name
 170     .func \name
 171     \name:
 172     .cfi_startproc
 173     .equ cfa_current_offset, -8
 174 .endm
 175
 176 /* ... and .ENDP, replacing ENDP */
 177 .macro .ENDP name
 178     .cfi_endproc
 179     .endfunc
 180 .endm
 181
 182 /* MASM compatible PUBLIC */
 183 .macro PUBLIC symbol
 184     .global \symbol
 185 .endm
 186
 187 /* Dummy ASSUME */
 188 .macro ASSUME p1 p2 p3 p4 p5 p6 p7 p8
 189 .endm
 190
 191 /* MASM needs an end tag for segments */
 192 .macro .endcode16
 193 .endm
 194
 195 /* MASM compatible ALIGN */
 196 #define ALIGN .align
 197
 198 /* MASM compatible REPEAT, additional ENDR */
 199 #define REPEAT .rept
 200 #define ENDR .endr
 201
 202 .macro ljmp segment, offset
 203     jmp far ptr \segment:\offset
 204 .endm
 205
 206 .macro ljmp16 segment, offset
 207     jmp far ptr \segment:\offset
 208 .endm
 209
 210 /* MASM compatible EXTERN */
 211 .macro EXTERN name
 212 .endm
 213
 214 /* MASM needs an END tag */
 215 #define END
 216
 217 .macro .MODEL model
 218 .endm
 219
 220 .macro .code
 221     .text
 222 .endm
 223
 224 /* Macros for x64 stack unwind OPs */
 225
 226 .macro .allocstack size
 227     .cfi_adjust_cfa_offset \size
 228     .set cfa_current_offset, cfa_current_offset - \size
 229 .endm
 230
 231 code = 1
 232 .macro .pushframe param=0
 233     .if (\param)
 234         .cfi_adjust_cfa_offset 0x30
 235         .set cfa_current_offset, cfa_current_offset - 0x30
 236     .else
 237         .cfi_adjust_cfa_offset 0x28
 238         .set cfa_current_offset, cfa_current_offset - 0x28
 239     .endif
 240 .endm
 241
 242 .macro .pushreg reg
 243     .cfi_adjust_cfa_offset 8
 244     .equ cfa_current_offset, cfa_current_offset - 8
 245     .cfi_offset \reg, cfa_current_offset
 246 .endm
 247
 248 .macro .savereg reg, offset
 249     // checkme!!!
 250     .cfi_offset \reg, \offset
 251 .endm
 252
 253 .macro .savexmm128 reg, offset
 254     // checkme!!!
 255     .cfi_offset \reg, \offset
 256 .endm
 257
 258 .macro .setframe reg, offset
 259     .cfi_def_cfa reg, \offset
 260     .equ cfa_current_offset, \offset
 261 .endm
 262
 263 .macro .endprolog
 264 .endm
 265
 266 .macro UNIMPLEMENTED2 file, line, func
 267
 268     jmp 3f
 269 1:  .asciz "\func"
 270 2:  .asciz \file
 271 3:
 272     sub rsp, 0x20
 273     lea rcx, MsgUnimplemented[rip]
 274     lea rdx, 1b[rip]
 275     lea r8, 2b[rip]
 276     mov r9, \line
 277     call DbgPrint
 278     add rsp, 0x20
 279 .endm
 280 #define UNIMPLEMENTED UNIMPLEMENTED2 __FILE__, __LINE__,
 281
 282 /* MASM/ML uses ".if" for runtime conditionals, and "if" for compile time
 283    conditionals. We therefore use "if", too. .if shouldn't be used at all */
 284 #define if .if
 285 #define endif .endif
 286 #define else .else
 287 #define elseif .elseif
 288
 289 #endif