lunaix-os/arch/i386/includes/sys/abi.h

   1 #ifndef __LUNAIX_I386ABI_H
   2 #define __LUNAIX_I386ABI_H
   3
   4 #include "sys/x86_isa.h"
   5
   6 #define stack_alignment 0xfffffff0
   7
   8 #ifndef __ASM__
   9 #define align_stack(ptr) ((ptr) & stack_alignment)
  10 #define store_retval(retval) current_thread->hstate->registers.eax = (retval)
  11
  12 #define store_retval_to(th, retval) (th)->hstate->registers.eax = (retval)
  13
  14 static inline void must_inline
  15 j_usr(ptr_t sp, ptr_t pc)
  16 {
  17     asm volatile("movw %0, %%ax\n"
  18                  "movw %%ax, %%es\n"
  19                  "movw %%ax, %%ds\n"
  20                  "movw %%ax, %%fs\n"
  21                  "movw %%ax, %%gs\n"
  22                  "pushl %0\n"
  23                  "pushl %1\n"
  24                  "pushl %2\n"
  25                  "pushl %3\n"
  26                  "retf" ::"i"(UDATA_SEG),
  27                  "r"(sp),
  28                  "i"(UCODE_SEG),
  29                  "r"(pc)
  30                  : "eax", "memory");
  31 }
  32
  33
  34 static inline void must_inline noret
  35 switch_context() {
  36     asm volatile("jmp do_switch\n");
  37     unreachable;
  38 }
  39
  40 #define push_arg1(stack_ptr, arg) *((typeof((arg))*)(stack_ptr)--) = arg
  41 #define push_arg2(stack_ptr, arg1, arg2)                                       \
  42     {                                                                          \
  43         *((typeof((arg1))*)(stack_ptr)--) = arg1;                              \
  44         *((typeof((arg2))*)(stack_ptr)--) = arg2;                              \
  45     }
  46 #define push_arg3(stack_ptr, arg1, arg2, arg3)                                 \
  47     {                                                                          \
  48         *((typeof((arg1))*)(stack_ptr)--) = arg1;                              \
  49         *((typeof((arg2))*)(stack_ptr)--) = arg2;                              \
  50         *((typeof((arg3))*)(stack_ptr)--) = arg3;                              \
  51     }
  52 #define push_arg4(stack_ptr, arg1, arg2, arg3, arg4)                           \
  53     {                                                                          \
  54         *((typeof((arg1))*)(stack_ptr)--) = arg1;                              \
  55         *((typeof((arg2))*)(stack_ptr)--) = arg2;                              \
  56         *((typeof((arg3))*)(stack_ptr)--) = arg3;                              \
  57         *((typeof((arg4))*)(stack_ptr)--) = arg4;                              \
  58     }
  59
  60
  61 static inline ptr_t must_inline
  62 abi_get_callframe()
  63 {
  64     ptr_t val;
  65     asm("movl %%ebp, %0" : "=r"(val)::);
  66     return val;
  67 }
  68
  69 static inline ptr_t
  70 abi_get_retaddr()
  71 {
  72     return *((ptr_t*)abi_get_callframe() + 1);
  73 }
  74
  75 static inline ptr_t
  76 abi_get_retaddrat(ptr_t fp)
  77 {
  78     return *((ptr_t*)fp + 1);
  79 }
  80 #endif
  81 #endif /* __LUNAIX_ABI_H */