lunaix-os/includes/arch/x86/i386_abi.h

   1 #ifndef __LUNAIX_I386ABI_H
   2 #define __LUNAIX_I386ABI_H
   3
   4 #define store_retval(retval) __current->intr_ctx.registers.eax = (retval)
   5
   6 #define store_retval_to(proc, retval) (proc)->intr_ctx.registers.eax = (retval)
   7
   8 #define j_usr(sp, pc)                                                          \
   9     asm volatile("movw %0, %%ax\n"                                             \
  10                  "movw %%ax, %%es\n"                                           \
  11                  "movw %%ax, %%ds\n"                                           \
  12                  "movw %%ax, %%fs\n"                                           \
  13                  "movw %%ax, %%gs\n"                                           \
  14                  "pushl %0\n"                                                  \
  15                  "pushl %1\n"                                                  \
  16                  "pushl %2\n"                                                  \
  17                  "pushl %3\n"                                                  \
  18                  "retf" ::"i"(UDATA_SEG),                                      \
  19                  "r"(sp),                                                      \
  20                  "i"(UCODE_SEG),                                               \
  21                  "r"(pc)                                                       \
  22                  : "eax", "memory");
  23
  24 #endif /* __LUNAIX_ABI_H */