src/include/stddef.h

   1 #ifndef STDDEF_H
   2 #define STDDEF_H
   3
   4 #include <commonlib/helpers.h>
   5 #include <rules.h>
   6
   7 typedef long ptrdiff_t;
   8 #ifndef __SIZE_TYPE__
   9 #define __SIZE_TYPE__ unsigned long
  10 #endif
  11 typedef __SIZE_TYPE__ size_t;
  12 /* There is a GCC macro for a size_t type, but not
  13  * for a ssize_t type. Below construct tricks GCC
  14  * into making __SIZE_TYPE__ signed.
  15  */
  16 #define unsigned signed
  17 typedef __SIZE_TYPE__ ssize_t;
  18 #undef unsigned
  19
  20 typedef int wchar_t;
  21 typedef unsigned int wint_t;
  22
  23 #define NULL ((void *)0)
  24
  25 /* The devicetree data structures are only mutable in ramstage. All other
  26    stages have a constant devicetree. */
  27 #if !ENV_RAMSTAGE
  28 #define DEVTREE_EARLY 1
  29 #else
  30 #define DEVTREE_EARLY 0
  31 #endif
  32
  33 #if DEVTREE_EARLY
  34 #define DEVTREE_CONST const
  35 #else
  36 #define DEVTREE_CONST
  37 #endif
  38
  39 /* Work around non-writable data segment in execute-in-place romstage on x86. */
  40 #if defined(__PRE_RAM__) && IS_ENABLED(CONFIG_ARCH_X86)
  41 #define MAYBE_STATIC
  42 #else
  43 #define MAYBE_STATIC static
  44 #endif
  45
  46 #ifndef __ROMCC__
  47 /* Provide a pointer to address 0 that thwarts any "accessing this is
  48  * undefined behaviour and do whatever" trickery in compilers.
  49  * Use when you _really_ need to read32(zeroptr) (ie. read address 0).
  50  */
  51 extern char zeroptr[];
  52 #endif
  53
  54 #endif /* STDDEF_H */