arch/um/include/sysdep-x86_64/ptrace.h

   1 /*
   2  * Copyright 2003 PathScale, Inc.
   3  * Copyright (C) 2003 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
   4  *
   5  * Licensed under the GPL
   6  */
   7
   8 #ifndef __SYSDEP_X86_64_PTRACE_H
   9 #define __SYSDEP_X86_64_PTRACE_H
  10
  11 #include "uml-config.h"
  12 #include "user_constants.h"
  13 #include "sysdep/faultinfo.h"
  14
  15 #define MAX_REG_OFFSET (UM_FRAME_SIZE)
  16 #define MAX_REG_NR ((MAX_REG_OFFSET) / sizeof(unsigned long))
  17
  18 #include "skas_ptregs.h"
  19
  20 #define REGS_IP(r) ((r)[HOST_IP])
  21 #define REGS_SP(r) ((r)[HOST_SP])
  22
  23 #define REGS_RBX(r) ((r)[HOST_RBX])
  24 #define REGS_RCX(r) ((r)[HOST_RCX])
  25 #define REGS_RDX(r) ((r)[HOST_RDX])
  26 #define REGS_RSI(r) ((r)[HOST_RSI])
  27 #define REGS_RDI(r) ((r)[HOST_RDI])
  28 #define REGS_RBP(r) ((r)[HOST_RBP])
  29 #define REGS_RAX(r) ((r)[HOST_RAX])
  30 #define REGS_R8(r) ((r)[HOST_R8])
  31 #define REGS_R9(r) ((r)[HOST_R9])
  32 #define REGS_R10(r) ((r)[HOST_R10])
  33 #define REGS_R11(r) ((r)[HOST_R11])
  34 #define REGS_R12(r) ((r)[HOST_R12])
  35 #define REGS_R13(r) ((r)[HOST_R13])
  36 #define REGS_R14(r) ((r)[HOST_R14])
  37 #define REGS_R15(r) ((r)[HOST_R15])
  38 #define REGS_CS(r) ((r)[HOST_CS])
  39 #define REGS_EFLAGS(r) ((r)[HOST_EFLAGS])
  40 #define REGS_SS(r) ((r)[HOST_SS])
  41
  42 #define HOST_FS_BASE 21
  43 #define HOST_GS_BASE 22
  44 #define HOST_DS 23
  45 #define HOST_ES 24
  46 #define HOST_FS 25
  47 #define HOST_GS 26
  48
  49 /* Also defined in asm/ptrace-x86_64.h, but not in libc headers.  So, these
  50  * are already defined for kernel code, but not for userspace code.
  51  */
  52 #ifndef FS_BASE
  53 /* These aren't defined in ptrace.h, but exist in struct user_regs_struct,
  54  * which is what x86_64 ptrace actually uses.
  55  */
  56 #define FS_BASE (HOST_FS_BASE * sizeof(long))
  57 #define GS_BASE (HOST_GS_BASE * sizeof(long))
  58 #define DS (HOST_DS * sizeof(long))
  59 #define ES (HOST_ES * sizeof(long))
  60 #define FS (HOST_FS * sizeof(long))
  61 #define GS (HOST_GS * sizeof(long))
  62 #endif
  63
  64 #define REGS_FS_BASE(r) ((r)[HOST_FS_BASE])
  65 #define REGS_GS_BASE(r) ((r)[HOST_GS_BASE])
  66 #define REGS_DS(r) ((r)[HOST_DS])
  67 #define REGS_ES(r) ((r)[HOST_ES])
  68 #define REGS_FS(r) ((r)[HOST_FS])
  69 #define REGS_GS(r) ((r)[HOST_GS])
  70
  71 #define REGS_ORIG_RAX(r) ((r)[HOST_ORIG_RAX])
  72
  73 #define REGS_SET_SYSCALL_RETURN(r, res) REGS_RAX(r) = (res)
  74
  75 #define REGS_RESTART_SYSCALL(r) IP_RESTART_SYSCALL(REGS_IP(r))
  76
  77 #define REGS_SEGV_IS_FIXABLE(r) SEGV_IS_FIXABLE((r)->trap_type)
  78
  79 #define REGS_FAULT_ADDR(r) ((r)->fault_addr)
  80
  81 #define REGS_FAULT_WRITE(r) FAULT_WRITE((r)->fault_type)
  82
  83 #define REGS_TRAP(r) ((r)->trap_type)
  84
  85 #define REGS_ERR(r) ((r)->fault_type)
  86
  87 struct uml_pt_regs {
  88         unsigned long gp[MAX_REG_NR];
  89         struct faultinfo faultinfo;
  90         long syscall;
  91         int is_user;
  92 };
  93
  94 #define EMPTY_UML_PT_REGS { }
  95
  96 #define UPT_RBX(r) REGS_RBX((r)->gp)
  97 #define UPT_RCX(r) REGS_RCX((r)->gp)
  98 #define UPT_RDX(r) REGS_RDX((r)->gp)
  99 #define UPT_RSI(r) REGS_RSI((r)->gp)
 100 #define UPT_RDI(r) REGS_RDI((r)->gp)
 101 #define UPT_RBP(r) REGS_RBP((r)->gp)
 102 #define UPT_RAX(r) REGS_RAX((r)->gp)
 103 #define UPT_R8(r) REGS_R8((r)->gp)
 104 #define UPT_R9(r) REGS_R9((r)->gp)
 105 #define UPT_R10(r) REGS_R10((r)->gp)
 106 #define UPT_R11(r) REGS_R11((r)->gp)
 107 #define UPT_R12(r) REGS_R12((r)->gp)
 108 #define UPT_R13(r) REGS_R13((r)->gp)
 109 #define UPT_R14(r) REGS_R14((r)->gp)
 110 #define UPT_R15(r) REGS_R15((r)->gp)
 111 #define UPT_CS(r) REGS_CS((r)->gp)
 112 #define UPT_FS_BASE(r) REGS_FS_BASE((r)->gp)
 113 #define UPT_FS(r) REGS_FS((r)->gp)
 114 #define UPT_GS_BASE(r) REGS_GS_BASE((r)->gp)
 115 #define UPT_GS(r) REGS_GS((r)->gp)
 116 #define UPT_DS(r) REGS_DS((r)->gp)
 117 #define UPT_ES(r) REGS_ES((r)->gp)
 118 #define UPT_CS(r) REGS_CS((r)->gp)
 119 #define UPT_SS(r) REGS_SS((r)->gp)
 120 #define UPT_ORIG_RAX(r) REGS_ORIG_RAX((r)->gp)
 121
 122 #define UPT_IP(r) REGS_IP((r)->gp)
 123 #define UPT_SP(r) REGS_SP((r)->gp)
 124
 125 #define UPT_EFLAGS(r) REGS_EFLAGS((r)->gp)
 126 #define UPT_SYSCALL_NR(r) ((r)->syscall)
 127 #define UPT_SYSCALL_RET(r) UPT_RAX(r)
 128
 129 extern int user_context(unsigned long sp);
 130
 131 #define UPT_IS_USER(r) ((r)->is_user)
 132
 133 #define UPT_SYSCALL_ARG1(r) UPT_RDI(r)
 134 #define UPT_SYSCALL_ARG2(r) UPT_RSI(r)
 135 #define UPT_SYSCALL_ARG3(r) UPT_RDX(r)
 136 #define UPT_SYSCALL_ARG4(r) UPT_R10(r)
 137 #define UPT_SYSCALL_ARG5(r) UPT_R8(r)
 138 #define UPT_SYSCALL_ARG6(r) UPT_R9(r)
 139
 140 struct syscall_args {
 141         unsigned long args[6];
 142 };
 143
 144 #define SYSCALL_ARGS(r) ((struct syscall_args) \
 145                          { .args = { UPT_SYSCALL_ARG1(r),        \
 146                                      UPT_SYSCALL_ARG2(r),        \
 147                                      UPT_SYSCALL_ARG3(r),        \
 148                                      UPT_SYSCALL_ARG4(r),        \
 149                                      UPT_SYSCALL_ARG5(r),        \
 150                                      UPT_SYSCALL_ARG6(r) } } )
 151
 152 #define UPT_REG(regs, reg) \
 153         ({      unsigned long val;              \
 154                 switch(reg){                                            \
 155                 case R8: val = UPT_R8(regs); break;                     \
 156                 case R9: val = UPT_R9(regs); break;                     \
 157                 case R10: val = UPT_R10(regs); break;                   \
 158                 case R11: val = UPT_R11(regs); break;                   \
 159                 case R12: val = UPT_R12(regs); break;                   \
 160                 case R13: val = UPT_R13(regs); break;                   \
 161                 case R14: val = UPT_R14(regs); break;                   \
 162                 case R15: val = UPT_R15(regs); break;                   \
 163                 case RIP: val = UPT_IP(regs); break;                    \
 164                 case RSP: val = UPT_SP(regs); break;                    \
 165                 case RAX: val = UPT_RAX(regs); break;                   \
 166                 case RBX: val = UPT_RBX(regs); break;                   \
 167                 case RCX: val = UPT_RCX(regs); break;                   \
 168                 case RDX: val = UPT_RDX(regs); break;                   \
 169                 case RSI: val = UPT_RSI(regs); break;                   \
 170                 case RDI: val = UPT_RDI(regs); break;                   \
 171                 case RBP: val = UPT_RBP(regs); break;                   \
 172                 case ORIG_RAX: val = UPT_ORIG_RAX(regs); break;         \
 173                 case CS: val = UPT_CS(regs); break;                     \
 174                 case SS: val = UPT_SS(regs); break;                     \
 175                 case FS_BASE: val = UPT_FS_BASE(regs); break;           \
 176                 case GS_BASE: val = UPT_GS_BASE(regs); break;           \
 177                 case DS: val = UPT_DS(regs); break;                     \
 178                 case ES: val = UPT_ES(regs); break;                     \
 179                 case FS : val = UPT_FS (regs); break;                   \
 180                 case GS: val = UPT_GS(regs); break;                     \
 181                 case EFLAGS: val = UPT_EFLAGS(regs); break;             \
 182                 default :                                               \
 183                         panic("Bad register in UPT_REG : %d\n", reg);   \
 184                         val = -1;                                       \
 185                 }                                                       \
 186                 val;                                                    \
 187         })
 188
 189
 190 #define UPT_SET(regs, reg, val) \
 191         ({      unsigned long __upt_val = val;  \
 192                 switch(reg){                                            \
 193                 case R8: UPT_R8(regs) = __upt_val; break;               \
 194                 case R9: UPT_R9(regs) = __upt_val; break;               \
 195                 case R10: UPT_R10(regs) = __upt_val; break;             \
 196                 case R11: UPT_R11(regs) = __upt_val; break;             \
 197                 case R12: UPT_R12(regs) = __upt_val; break;             \
 198                 case R13: UPT_R13(regs) = __upt_val; break;             \
 199                 case R14: UPT_R14(regs) = __upt_val; break;             \
 200                 case R15: UPT_R15(regs) = __upt_val; break;             \
 201                 case RIP: UPT_IP(regs) = __upt_val; break;              \
 202                 case RSP: UPT_SP(regs) = __upt_val; break;              \
 203                 case RAX: UPT_RAX(regs) = __upt_val; break;             \
 204                 case RBX: UPT_RBX(regs) = __upt_val; break;             \
 205                 case RCX: UPT_RCX(regs) = __upt_val; break;             \
 206                 case RDX: UPT_RDX(regs) = __upt_val; break;             \
 207                 case RSI: UPT_RSI(regs) = __upt_val; break;             \
 208                 case RDI: UPT_RDI(regs) = __upt_val; break;             \
 209                 case RBP: UPT_RBP(regs) = __upt_val; break;             \
 210                 case ORIG_RAX: UPT_ORIG_RAX(regs) = __upt_val; break;   \
 211                 case CS: UPT_CS(regs) = __upt_val; break;               \
 212                 case SS: UPT_SS(regs) = __upt_val; break;               \
 213                 case FS_BASE: UPT_FS_BASE(regs) = __upt_val; break;     \
 214                 case GS_BASE: UPT_GS_BASE(regs) = __upt_val; break;     \
 215                 case DS: UPT_DS(regs) = __upt_val; break;               \
 216                 case ES: UPT_ES(regs) = __upt_val; break;               \
 217                 case FS: UPT_FS(regs) = __upt_val; break;               \
 218                 case GS: UPT_GS(regs) = __upt_val; break;               \
 219                 case EFLAGS: UPT_EFLAGS(regs) = __upt_val; break;       \
 220                 default :                                               \
 221                         panic("Bad register in UPT_SET : %d\n", reg);   \
 222                         break;                                          \
 223                 }                                                       \
 224                 __upt_val;                                              \
 225         })
 226
 227 #define UPT_SET_SYSCALL_RETURN(r, res) \
 228         REGS_SET_SYSCALL_RETURN((r)->regs, (res))
 229
 230 #define UPT_RESTART_SYSCALL(r) REGS_RESTART_SYSCALL((r)->gp)
 231
 232 #define UPT_SEGV_IS_FIXABLE(r) REGS_SEGV_IS_FIXABLE(&r->skas)
 233
 234 #define UPT_FAULTINFO(r) (&(r)->faultinfo)
 235
 236 static inline void arch_init_registers(int pid)
 237 {
 238 }
 239
 240 #endif