src/arch/i386/include/registers.h

   1 #ifndef REGISTERS_H
   2 #define REGISTERS_H
   3
   4 #include "stdint.h"
   5
   6 /* Basic 16-bit and 32-bit register types */
   7 typedef union {
   8         struct {
   9                 union {
  10                         uint8_t l;
  11                         uint8_t byte;
  12                 };
  13                 uint8_t h;
  14         } PACKED;
  15         uint16_t word;
  16 } PACKED reg16_t;
  17
  18 typedef union {
  19         reg16_t;
  20         uint32_t dword;
  21 } PACKED reg32_t;
  22
  23 /* As created by pushal / read by popal */
  24 struct i386_regs {
  25         union {
  26                 uint16_t di;
  27                 uint32_t edi;
  28         };
  29         union {
  30                 uint16_t si;
  31                 uint32_t esi;
  32         };
  33         union {
  34                 uint16_t bp;
  35                 uint32_t ebp;
  36         };
  37         union {
  38                 uint16_t sp;
  39                 uint32_t esp;
  40         };
  41         union {
  42                 struct {
  43                         uint8_t bl;
  44                         uint8_t bh;
  45                 } PACKED;
  46                 uint16_t bx;
  47                 uint32_t ebx;
  48         };
  49         union {
  50                 struct {
  51                         uint8_t dl;
  52                         uint8_t dh;
  53                 } PACKED;
  54                 uint16_t dx;
  55                 uint32_t edx;
  56         };
  57         union {
  58                 struct {
  59                         uint8_t cl;
  60                         uint8_t ch;
  61                 } PACKED;
  62                 uint16_t cx;
  63                 uint32_t ecx;
  64         };
  65         union {
  66                 struct {
  67                         uint8_t al;
  68                         uint8_t ah;
  69                 } PACKED;
  70                 uint16_t ax;
  71                 uint32_t eax;
  72         };
  73 } PACKED;
  74
  75 /* Our pushal/popal equivalent for segment registers */
  76 struct i386_seg_regs {
  77         uint16_t cs;
  78         uint16_t ss;
  79         uint16_t ds;
  80         uint16_t es;
  81         uint16_t fs;
  82         uint16_t gs;
  83 } PACKED;
  84
  85 /* All i386 registers, as passed in by prot_call or kir_call */
  86 struct i386_all_regs {
  87         struct i386_seg_regs;
  88         struct i386_regs;
  89         uint32_t i386_flags;
  90 } PACKED;
  91
  92 #endif /* REGISTERS_H */