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

   1 /*
   2  * Copyright 2003 PathScale, Inc.
   3  *
   4  * Licensed under the GPL
   5  */
   6
   7 #ifndef __SYSDEP_X86_64_PTRACE_H
   8 #define __SYSDEP_X86_64_PTRACE_H
   9
  10 #include "uml-config.h"
  11 #include "user_constants.h"
  12 #include "sysdep/faultinfo.h"
  13
  14 #define MAX_REG_OFFSET (UM_FRAME_SIZE)
  15 #define MAX_REG_NR ((MAX_REG_OFFSET) / sizeof(unsigned long))
  16
  17 #ifdef UML_CONFIG_MODE_TT
  18 #include "sysdep/sc.h"
  19 #endif
  20
  21 #ifdef UML_CONFIG_MODE_SKAS
  22 #include "skas_ptregs.h"
  23
  24 #define REGS_IP(r) ((r)[HOST_IP])
  25 #define REGS_SP(r) ((r)[HOST_SP])
  26
  27 #define REGS_RBX(r) ((r)[HOST_RBX])
  28 #define REGS_RCX(r) ((r)[HOST_RCX])
  29 #define REGS_RDX(r) ((r)[HOST_RDX])
  30 #define REGS_RSI(r) ((r)[HOST_RSI])
  31 #define REGS_RDI(r) ((r)[HOST_RDI])
  32 #define REGS_RBP(r) ((r)[HOST_RBP])
  33 #define REGS_RAX(r) ((r)[HOST_RAX])
  34 #define REGS_R8(r) ((r)[HOST_R8])
  35 #define REGS_R9(r) ((r)[HOST_R9])
  36 #define REGS_R10(r) ((r)[HOST_R10])
  37 #define REGS_R11(r) ((r)[HOST_R11])
  38 #define REGS_R12(r) ((r)[HOST_R12])
  39 #define REGS_R13(r) ((r)[HOST_R13])
  40 #define REGS_R14(r) ((r)[HOST_R14])
  41 #define REGS_R15(r) ((r)[HOST_R15])
  42 #define REGS_CS(r) ((r)[HOST_CS])
  43 #define REGS_EFLAGS(r) ((r)[HOST_EFLAGS])
  44 #define REGS_SS(r) ((r)[HOST_SS])
  45
  46 #define HOST_FS_BASE 21
  47 #define HOST_GS_BASE 22
  48 #define HOST_DS 23
  49 #define HOST_ES 24
  50 #define HOST_FS 25
  51 #define HOST_GS 26
  52
  53 /* Also defined in asm/ptrace-x86_64.h, but not in libc headers.  So, these
  54  * are already defined for kernel code, but not for userspace code.
  55  */
  56 #ifndef FS_BASE
  57 /* These aren't defined in ptrace.h, but exist in struct user_regs_struct,
  58  * which is what x86_64 ptrace actually uses.
  59  */
  60 #define FS_BASE (HOST_FS_BASE * sizeof(long))
  61 #define GS_BASE (HOST_GS_BASE * sizeof(long))
  62 #define DS (HOST_DS * sizeof(long))
  63 #define ES (HOST_ES * sizeof(long))
  64 #define FS (HOST_FS * sizeof(long))
  65 #define GS (HOST_GS * sizeof(long))
  66 #endif
  67
  68 #define REGS_FS_BASE(r) ((r)[HOST_FS_BASE])
  69 #define REGS_GS_BASE(r) ((r)[HOST_GS_BASE])
  70 #define REGS_DS(r) ((r)[HOST_DS])
  71 #define REGS_ES(r) ((r)[HOST_ES])
  72 #define REGS_FS(r) ((r)[HOST_FS])
  73 #define REGS_GS(r) ((r)[HOST_GS])
  74
  75 #define REGS_ORIG_RAX(r) ((r)[HOST_ORIG_RAX])
  76
  77 #define REGS_SET_SYSCALL_RETURN(r, res) REGS_RAX(r) = (res)
  78
  79 #define REGS_RESTART_SYSCALL(r) IP_RESTART_SYSCALL(REGS_IP(r))
  80
  81 #define REGS_SEGV_IS_FIXABLE(r) SEGV_IS_FIXABLE((r)->trap_type)
  82
  83 #define REGS_FAULT_ADDR(r) ((r)->fault_addr)
  84
  85 #define REGS_FAULT_WRITE(r) FAULT_WRITE((r)->fault_type)
  86
  87 #define REGS_TRAP(r) ((r)->trap_type)
  88
  89 #define REGS_ERR(r) ((r)->fault_type)
  90
  91 #endif
  92
  93 #include "choose-mode.h"
  94
  95 /* XXX */
  96 union uml_pt_regs {
  97 #ifdef UML_CONFIG_MODE_TT
  98         struct tt_regs {
  99                 long syscall;
 100                 unsigned long orig_rax;
 101                 void *sc;
 102                 struct faultinfo faultinfo;
 103         } tt;
 104 #endif
 105 #ifdef UML_CONFIG_MODE_SKAS
 106         struct skas_regs {
 107                 /* x86_64 ptrace uses sizeof(user_regs_struct) as its register
 108                  * file size, while i386 uses FRAME_SIZE.  Therefore, we need
 109                  * to use UM_FRAME_SIZE here instead of HOST_FRAME_SIZE.
 110                  */
 111                 unsigned long regs[MAX_REG_NR];
 112                 unsigned long fp[HOST_FP_SIZE];
 113                 struct faultinfo faultinfo;
 114                 long syscall;
 115                 int is_user;
 116         } skas;
 117 #endif
 118 };
 119
 120 #define EMPTY_UML_PT_REGS { }
 121
 122 /* XXX */
 123 extern int mode_tt;
 124
 125 #define UPT_RBX(r) __CHOOSE_MODE(SC_RBX(UPT_SC(r)), REGS_RBX((r)->skas.regs))
 126 #define UPT_RCX(r) __CHOOSE_MODE(SC_RCX(UPT_SC(r)), REGS_RCX((r)->skas.regs))
 127 #define UPT_RDX(r) __CHOOSE_MODE(SC_RDX(UPT_SC(r)), REGS_RDX((r)->skas.regs))
 128 #define UPT_RSI(r) __CHOOSE_MODE(SC_RSI(UPT_SC(r)), REGS_RSI((r)->skas.regs))
 129 #define UPT_RDI(r) __CHOOSE_MODE(SC_RDI(UPT_SC(r)), REGS_RDI((r)->skas.regs))
 130 #define UPT_RBP(r) __CHOOSE_MODE(SC_RBP(UPT_SC(r)), REGS_RBP((r)->skas.regs))
 131 #define UPT_RAX(r) __CHOOSE_MODE(SC_RAX(UPT_SC(r)), REGS_RAX((r)->skas.regs))
 132 #define UPT_R8(r) __CHOOSE_MODE(SC_R8(UPT_SC(r)), REGS_R8((r)->skas.regs))
 133 #define UPT_R9(r) __CHOOSE_MODE(SC_R9(UPT_SC(r)), REGS_R9((r)->skas.regs))
 134 #define UPT_R10(r) __CHOOSE_MODE(SC_R10(UPT_SC(r)), REGS_R10((r)->skas.regs))
 135 #define UPT_R11(r) __CHOOSE_MODE(SC_R11(UPT_SC(r)), REGS_R11((r)->skas.regs))
 136 #define UPT_R12(r) __CHOOSE_MODE(SC_R12(UPT_SC(r)), REGS_R12((r)->skas.regs))
 137 #define UPT_R13(r) __CHOOSE_MODE(SC_R13(UPT_SC(r)), REGS_R13((r)->skas.regs))
 138 #define UPT_R14(r) __CHOOSE_MODE(SC_R14(UPT_SC(r)), REGS_R14((r)->skas.regs))
 139 #define UPT_R15(r) __CHOOSE_MODE(SC_R15(UPT_SC(r)), REGS_R15((r)->skas.regs))
 140 #define UPT_CS(r) __CHOOSE_MODE(SC_CS(UPT_SC(r)), REGS_CS((r)->skas.regs))
 141 #define UPT_FS_BASE(r) \
 142         __CHOOSE_MODE(SC_FS_BASE(UPT_SC(r)), REGS_FS_BASE((r)->skas.regs))
 143 #define UPT_FS(r) __CHOOSE_MODE(SC_FS(UPT_SC(r)), REGS_FS((r)->skas.regs))
 144 #define UPT_GS_BASE(r) \
 145         __CHOOSE_MODE(SC_GS_BASE(UPT_SC(r)), REGS_GS_BASE((r)->skas.regs))
 146 #define UPT_GS(r) __CHOOSE_MODE(SC_GS(UPT_SC(r)), REGS_GS((r)->skas.regs))
 147 #define UPT_DS(r) __CHOOSE_MODE(SC_DS(UPT_SC(r)), REGS_DS((r)->skas.regs))
 148 #define UPT_ES(r) __CHOOSE_MODE(SC_ES(UPT_SC(r)), REGS_ES((r)->skas.regs))
 149 #define UPT_CS(r) __CHOOSE_MODE(SC_CS(UPT_SC(r)), REGS_CS((r)->skas.regs))
 150 #define UPT_SS(r) __CHOOSE_MODE(SC_SS(UPT_SC(r)), REGS_SS((r)->skas.regs))
 151 #define UPT_ORIG_RAX(r) \
 152         __CHOOSE_MODE((r)->tt.orig_rax, REGS_ORIG_RAX((r)->skas.regs))
 153
 154 #define UPT_IP(r) __CHOOSE_MODE(SC_IP(UPT_SC(r)), REGS_IP((r)->skas.regs))
 155 #define UPT_SP(r) __CHOOSE_MODE(SC_SP(UPT_SC(r)), REGS_SP((r)->skas.regs))
 156
 157 #define UPT_EFLAGS(r) \
 158         __CHOOSE_MODE(SC_EFLAGS(UPT_SC(r)), REGS_EFLAGS((r)->skas.regs))
 159 #define UPT_SC(r) ((r)->tt.sc)
 160 #define UPT_SYSCALL_NR(r) __CHOOSE_MODE((r)->tt.syscall, (r)->skas.syscall)
 161 #define UPT_SYSCALL_RET(r) UPT_RAX(r)
 162
 163 extern int user_context(unsigned long sp);
 164
 165 #define UPT_IS_USER(r) \
 166         CHOOSE_MODE(user_context(UPT_SP(r)), (r)->skas.is_user)
 167
 168 #define UPT_SYSCALL_ARG1(r) UPT_RDI(r)
 169 #define UPT_SYSCALL_ARG2(r) UPT_RSI(r)
 170 #define UPT_SYSCALL_ARG3(r) UPT_RDX(r)
 171 #define UPT_SYSCALL_ARG4(r) UPT_R10(r)
 172 #define UPT_SYSCALL_ARG5(r) UPT_R8(r)
 173 #define UPT_SYSCALL_ARG6(r) UPT_R9(r)
 174
 175 struct syscall_args {
 176         unsigned long args[6];
 177 };
 178
 179 #define SYSCALL_ARGS(r) ((struct syscall_args) \
 180                         { .args = { UPT_SYSCALL_ARG1(r), \
 181                                     UPT_SYSCALL_ARG2(r), \
 182                                     UPT_SYSCALL_ARG3(r), \
 183                                     UPT_SYSCALL_ARG4(r), \
 184                                     UPT_SYSCALL_ARG5(r), \
 185                                     UPT_SYSCALL_ARG6(r) } } )
 186
 187 #define UPT_REG(regs, reg) \
 188         ({      unsigned long val; \
 189                 switch(reg){ \
 190                 case R8: val = UPT_R8(regs); break; \
 191                 case R9: val = UPT_R9(regs); break; \
 192                 case R10: val = UPT_R10(regs); break; \
 193                 case R11: val = UPT_R11(regs); break; \
 194                 case R12: val = UPT_R12(regs); break; \
 195                 case R13: val = UPT_R13(regs); break; \
 196                 case R14: val = UPT_R14(regs); break; \
 197                 case R15: val = UPT_R15(regs); break; \
 198                 case RIP: val = UPT_IP(regs); break; \
 199                 case RSP: val = UPT_SP(regs); break; \
 200                 case RAX: val = UPT_RAX(regs); break; \
 201                 case RBX: val = UPT_RBX(regs); break; \
 202                 case RCX: val = UPT_RCX(regs); break; \
 203                 case RDX: val = UPT_RDX(regs); break; \
 204                 case RSI: val = UPT_RSI(regs); break; \
 205                 case RDI: val = UPT_RDI(regs); break; \
 206                 case RBP: val = UPT_RBP(regs); break; \
 207                 case ORIG_RAX: val = UPT_ORIG_RAX(regs); break; \
 208                 case CS: val = UPT_CS(regs); break; \
 209                 case SS: val = UPT_SS(regs); break; \
 210                 case FS_BASE: val = UPT_FS_BASE(regs); break; \
 211                 case GS_BASE: val = UPT_GS_BASE(regs); break; \
 212                 case DS: val = UPT_DS(regs); break; \
 213                 case ES: val = UPT_ES(regs); break; \
 214                 case FS : val = UPT_FS (regs); break; \
 215                 case GS: val = UPT_GS(regs); break;         \
 216                 case EFLAGS: val = UPT_EFLAGS(regs); break; \
 217                 default :  \
 218                         panic("Bad register in UPT_REG : %d\n", reg);  \
 219                         val = -1; \
 220                 } \
 221                 val; \
 222         })
 223
 224
 225 #define UPT_SET(regs, reg, val) \
 226         ({      unsigned long __upt_val = val; \
 227                 switch(reg){ \
 228                 case R8: UPT_R8(regs) = __upt_val; break; \
 229                 case R9: UPT_R9(regs) = __upt_val; break; \
 230                 case R10: UPT_R10(regs) = __upt_val; break; \
 231                 case R11: UPT_R11(regs) = __upt_val; break; \
 232                 case R12: UPT_R12(regs) = __upt_val; break; \
 233                 case R13: UPT_R13(regs) = __upt_val; break; \
 234                 case R14: UPT_R14(regs) = __upt_val; break; \
 235                 case R15: UPT_R15(regs) = __upt_val; break; \
 236                 case RIP: UPT_IP(regs) = __upt_val; break; \
 237                 case RSP: UPT_SP(regs) = __upt_val; break; \
 238                 case RAX: UPT_RAX(regs) = __upt_val; break; \
 239                 case RBX: UPT_RBX(regs) = __upt_val; break; \
 240                 case RCX: UPT_RCX(regs) = __upt_val; break; \
 241                 case RDX: UPT_RDX(regs) = __upt_val; break; \
 242                 case RSI: UPT_RSI(regs) = __upt_val; break; \
 243                 case RDI: UPT_RDI(regs) = __upt_val; break; \
 244                 case RBP: UPT_RBP(regs) = __upt_val; break; \
 245                 case ORIG_RAX: UPT_ORIG_RAX(regs) = __upt_val; break; \
 246                 case CS: UPT_CS(regs) = __upt_val; break; \
 247                 case SS: UPT_SS(regs) = __upt_val; break; \
 248                 case FS_BASE: UPT_FS_BASE(regs) = __upt_val; break; \
 249                 case GS_BASE: UPT_GS_BASE(regs) = __upt_val; break; \
 250                 case DS: UPT_DS(regs) = __upt_val; break; \
 251                 case ES: UPT_ES(regs) = __upt_val; break; \
 252                 case FS: UPT_FS(regs) = __upt_val; break; \
 253                 case GS: UPT_GS(regs) = __upt_val; break; \
 254                 case EFLAGS: UPT_EFLAGS(regs) = __upt_val; break; \
 255                 default :  \
 256                         panic("Bad register in UPT_SET : %d\n", reg);  \
 257                         break; \
 258                 } \
 259                 __upt_val; \
 260         })
 261
 262 #define UPT_SET_SYSCALL_RETURN(r, res) \
 263         CHOOSE_MODE(SC_SET_SYSCALL_RETURN(UPT_SC(r), (res)), \
 264                     REGS_SET_SYSCALL_RETURN((r)->skas.regs, (res)))
 265
 266 #define UPT_RESTART_SYSCALL(r) \
 267         CHOOSE_MODE(SC_RESTART_SYSCALL(UPT_SC(r)), \
 268                     REGS_RESTART_SYSCALL((r)->skas.regs))
 269
 270 #define UPT_SEGV_IS_FIXABLE(r) \
 271         CHOOSE_MODE(SC_SEGV_IS_FIXABLE(UPT_SC(r)), \
 272                     REGS_SEGV_IS_FIXABLE(&r->skas))
 273
 274 #define UPT_FAULTINFO(r) \
 275         CHOOSE_MODE((&(r)->tt.faultinfo), (&(r)->skas.faultinfo))
 276
 277 #endif