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