subsystems/mvdm/dos/asmxtras.inc

   1 /*
   2  * COPYRIGHT:       See COPYING in the top level directory
   3  * PROJECT:         ReactOS Kernel
   4  * FILE:            asmxtras.inc
   5  * PURPOSE:         Extended ASM macros for GAS and MASM/ML64
   6  * PROGRAMMERS:     Hermes Belusca-Maito (hermes.belusca@sfr.fr)
   7  *
   8  * NOTE: This file is an extension to our well-known asm.inc that defines
   9  *       a set of macros allowing us to assemble specially-crafted ASM files
  10  *       with both GAS and MASM/ML.
  11  *
  12  *       The additions introduced here are:
  13  *       - a 'long' define for MASM/ML that aliases to DWORD, and a 'dword'
  14  *         and 'DWORD' defines for GAS that alias to long.
  15  *       - an OFF(...) macro that is used for initializing global symbols with
  16  *         the offset value of another symbol.
  17  *       - a set of macros for defining and using structures.
  18  */
  19
  20 #ifndef __ASMXTRAS_INC__
  21 #define __ASMXTRAS_INC__
  22
  23 /* 'long' / 'dword'|'DWORD' macros for MASM/ML and GAS */
  24 #ifdef _USE_ML
  25     #define long dword
  26 #else
  27     #define dword long
  28     #define DWORD long
  29 #endif
  30
  31 /* OFFset macro */
  32 #ifdef _USE_ML
  33     #define OFF(x) offset x
  34 #else
  35     #define OFF(x) x
  36 #endif
  37
  38 /*
  39  * Set of macros for defining and using structures:
  40  * - STRUCT(name, ...) defines a structure of name 'name'.
  41  * - FIELD_DECL(field, type, value) adds a new structure member 'field'
  42  *   of type 'type', with the default value 'value'.
  43  * - ENDS(name) terminates the definition of the structure 'name'.
  44  * - A symbol 'name' of type 'struct' is declared with VAR_STRUCT(name, struct).
  45  * - Referencing a member 'field' of a symbol 'name' is done with FIELD(name, field).
  46  */
  47 #ifdef _USE_ML
  48
  49 #define STRUCT(name, ...) \
  50     name STRUCT __VA_ARGS__
  51
  52 #define FIELD_DECL(field, type, value) \
  53     field   type   value
  54
  55 #define ENDS(name) \
  56     name ENDS
  57
  58 #define VAR_STRUCT(name, struct) \
  59     name struct <>
  60
  61 #define FIELD(name, field) \
  62     name##.##field
  63
  64 #else
  65
  66 #define STRUCT(name, ...) \
  67     MACRO(name, VarName)
  68
  69 #define FIELD_DECL(field, type, value) \
  70     VarName\()_\()field:   .type   value
  71
  72 #define ENDS(...) ENDM
  73
  74 #define VAR_STRUCT(name, struct) \
  75     name: struct name
  76
  77 #define FIELD(name, field) \
  78     name##_##field
  79
  80 #endif
  81
  82 #endif /* __ASMXTRAS_INC__ */