src/runtime/x86-lispregs.h

   1 /*
   2  * These register names and offsets correspond to definitions in
   3  * compiler/x86/vm.lisp. They map into accessors in the OS-dependent
   4  * POSIX signal context structure os_context_t via the
   5  * os_context_register_addr(..) OS-dependent function.
   6  */
   7
   8 /*
   9  * This software is part of the SBCL system. See the README file for
  10  * more information.
  11  *
  12  * This software is derived from the CMU CL system, which was
  13  * written at Carnegie Mellon University and released into the
  14  * public domain. The software is in the public domain and is
  15  * provided with absolutely no warranty. See the COPYING and CREDITS
  16  * files for more information.
  17  */
  18
  19 /* the number of registers visible as registers in the virtual machine
  20  * (excludes stuff like segment registers) */
  21 #define NREGS   (8)
  22
  23 #ifdef LANGUAGE_ASSEMBLY
  24 #define REG(num) $ ## num
  25 #else
  26 #define REG(num) num
  27 #endif
  28
  29 #define reg_EAX REG( 0)
  30 #define reg_ECX REG( 2)
  31 #define reg_EDX REG( 4)
  32 #define reg_EBX REG( 6)
  33 #define reg_ESP REG( 8)
  34 #define reg_EBP REG(10)
  35 #define reg_ESI REG(12)
  36 #define reg_EDI REG(14)
  37 #define reg_UESP REG(16)
  38
  39 #define REGNAMES "EAX", "ECX", "EDX", "EBX", "ESP", "EBP", "ESI", "EDI", "UESP"
  40
  41 /* classification of registers
  42  *
  43  * reg_SP = the register used by Lisp as stack pointer
  44  * reg_FP = the register used by Lisp as frame pointer
  45  * BOXED_REGISTERS =
  46  *   the registers which may contain Lisp object pointers */
  47 #define reg_SP reg_ESP
  48 #define reg_FP reg_EBP
  49 #define BOXED_REGISTERS {\
  50   reg_EAX, reg_ECX, reg_EDX, reg_EBX, reg_ESI, reg_EDI \
  51   }