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