arch/um/include/sysdep-i386/ptrace.h

   1 /*
   2  * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
   3  * Licensed under the GPL
   4  */
   5
   6 #ifndef __SYSDEP_I386_PTRACE_H
   7 #define __SYSDEP_I386_PTRACE_H
   8
   9 #include "uml-config.h"
  10 #include "user_constants.h"
  11
  12 #define MAX_REG_NR (UM_FRAME_SIZE / sizeof(unsigned long))
  13 #define MAX_REG_OFFSET (UM_FRAME_SIZE)
  14
  15 extern void update_debugregs(int seq);
  16
  17 /* syscall emulation path in ptrace */
  18
  19 #ifndef PTRACE_SYSEMU
  20 #define PTRACE_SYSEMU 31
  21 #endif
  22
  23 void set_using_sysemu(int value);
  24 int get_using_sysemu(void);
  25 extern int sysemu_supported;
  26
  27 #ifdef UML_CONFIG_MODE_TT
  28 #include "sysdep/sc.h"
  29 #endif
  30
  31 #ifdef UML_CONFIG_MODE_SKAS
  32
  33 #include "skas_ptregs.h"
  34
  35 #define REGS_IP(r) ((r)[HOST_IP])
  36 #define REGS_SP(r) ((r)[HOST_SP])
  37 #define REGS_EFLAGS(r) ((r)[HOST_EFLAGS])
  38 #define REGS_EAX(r) ((r)[HOST_EAX])
  39 #define REGS_EBX(r) ((r)[HOST_EBX])
  40 #define REGS_ECX(r) ((r)[HOST_ECX])
  41 #define REGS_EDX(r) ((r)[HOST_EDX])
  42 #define REGS_ESI(r) ((r)[HOST_ESI])
  43 #define REGS_EDI(r) ((r)[HOST_EDI])
  44 #define REGS_EBP(r) ((r)[HOST_EBP])
  45 #define REGS_CS(r) ((r)[HOST_CS])
  46 #define REGS_SS(r) ((r)[HOST_SS])
  47 #define REGS_DS(r) ((r)[HOST_DS])
  48 #define REGS_ES(r) ((r)[HOST_ES])
  49 #define REGS_FS(r) ((r)[HOST_FS])
  50 #define REGS_GS(r) ((r)[HOST_GS])
  51
  52 #define REGS_SET_SYSCALL_RETURN(r, res) REGS_EAX(r) = (res)
  53
  54 #define REGS_RESTART_SYSCALL(r) IP_RESTART_SYSCALL(REGS_IP(r))
  55
  56 #define REGS_SEGV_IS_FIXABLE(r) SEGV_IS_FIXABLE((r)->trap_type)
  57
  58 #define REGS_FAULT_ADDR(r) ((r)->fault_addr)
  59
  60 #define REGS_FAULT_WRITE(r) FAULT_WRITE((r)->fault_type)
  61
  62 #endif
  63 #ifndef PTRACE_SYSEMU_SINGLESTEP
  64 #define PTRACE_SYSEMU_SINGLESTEP 32
  65 #endif
  66
  67 #include "choose-mode.h"
  68
  69 union uml_pt_regs {
  70 #ifdef UML_CONFIG_MODE_TT
  71         struct tt_regs {
  72                 long syscall;
  73                 void *sc;
  74         } tt;
  75 #endif
  76 #ifdef UML_CONFIG_MODE_SKAS
  77         struct skas_regs {
  78                 unsigned long regs[HOST_FRAME_SIZE];
  79                 unsigned long fp[HOST_FP_SIZE];
  80                 unsigned long xfp[HOST_XFP_SIZE];
  81                 unsigned long fault_addr;
  82                 unsigned long fault_type;
  83                 unsigned long trap_type;
  84                 long syscall;
  85                 int is_user;
  86         } skas;
  87 #endif
  88 };
  89
  90 #define EMPTY_UML_PT_REGS { }
  91
  92 extern int mode_tt;
  93
  94 #define UPT_SC(r) ((r)->tt.sc)
  95 #define UPT_IP(r) \
  96         __CHOOSE_MODE(SC_IP(UPT_SC(r)), REGS_IP((r)->skas.regs))
  97 #define UPT_SP(r) \
  98         __CHOOSE_MODE(SC_SP(UPT_SC(r)), REGS_SP((r)->skas.regs))
  99 #define UPT_EFLAGS(r) \
 100         __CHOOSE_MODE(SC_EFLAGS(UPT_SC(r)), REGS_EFLAGS((r)->skas.regs))
 101 #define UPT_EAX(r) \
 102         __CHOOSE_MODE(SC_EAX(UPT_SC(r)), REGS_EAX((r)->skas.regs))
 103 #define UPT_EBX(r) \
 104         __CHOOSE_MODE(SC_EBX(UPT_SC(r)), REGS_EBX((r)->skas.regs))
 105 #define UPT_ECX(r) \
 106         __CHOOSE_MODE(SC_ECX(UPT_SC(r)), REGS_ECX((r)->skas.regs))
 107 #define UPT_EDX(r) \
 108         __CHOOSE_MODE(SC_EDX(UPT_SC(r)), REGS_EDX((r)->skas.regs))
 109 #define UPT_ESI(r) \
 110         __CHOOSE_MODE(SC_ESI(UPT_SC(r)), REGS_ESI((r)->skas.regs))
 111 #define UPT_EDI(r) \
 112         __CHOOSE_MODE(SC_EDI(UPT_SC(r)), REGS_EDI((r)->skas.regs))
 113 #define UPT_EBP(r) \
 114         __CHOOSE_MODE(SC_EBP(UPT_SC(r)), REGS_EBP((r)->skas.regs))
 115 #define UPT_ORIG_EAX(r) \
 116         __CHOOSE_MODE((r)->tt.syscall, (r)->skas.syscall)
 117 #define UPT_CS(r) \
 118         __CHOOSE_MODE(SC_CS(UPT_SC(r)), REGS_CS((r)->skas.regs))
 119 #define UPT_SS(r) \
 120         __CHOOSE_MODE(SC_SS(UPT_SC(r)), REGS_SS((r)->skas.regs))
 121 #define UPT_DS(r) \
 122         __CHOOSE_MODE(SC_DS(UPT_SC(r)), REGS_DS((r)->skas.regs))
 123 #define UPT_ES(r) \
 124         __CHOOSE_MODE(SC_ES(UPT_SC(r)), REGS_ES((r)->skas.regs))
 125 #define UPT_FS(r) \
 126         __CHOOSE_MODE(SC_FS(UPT_SC(r)), REGS_FS((r)->skas.regs))
 127 #define UPT_GS(r) \
 128         __CHOOSE_MODE(SC_GS(UPT_SC(r)), REGS_GS((r)->skas.regs))
 129
 130 #define UPT_SYSCALL_ARG1(r) UPT_EBX(r)
 131 #define UPT_SYSCALL_ARG2(r) UPT_ECX(r)
 132 #define UPT_SYSCALL_ARG3(r) UPT_EDX(r)
 133 #define UPT_SYSCALL_ARG4(r) UPT_ESI(r)
 134 #define UPT_SYSCALL_ARG5(r) UPT_EDI(r)
 135 #define UPT_SYSCALL_ARG6(r) UPT_EBP(r)
 136
 137 extern int user_context(unsigned long sp);
 138
 139 #define UPT_IS_USER(r) \
 140         CHOOSE_MODE(user_context(UPT_SP(r)), (r)->skas.is_user)
 141
 142 struct syscall_args {
 143         unsigned long args[6];
 144 };
 145
 146 #define SYSCALL_ARGS(r) ((struct syscall_args) \
 147                         { .args = { UPT_SYSCALL_ARG1(r), \
 148                                     UPT_SYSCALL_ARG2(r), \
 149                                     UPT_SYSCALL_ARG3(r), \
 150                                     UPT_SYSCALL_ARG4(r), \
 151                                     UPT_SYSCALL_ARG5(r), \
 152                                     UPT_SYSCALL_ARG6(r) } } )
 153
 154 #define UPT_REG(regs, reg) \
 155         ({      unsigned long val; \
 156                 switch(reg){ \
 157                 case EIP: val = UPT_IP(regs); break; \
 158                 case UESP: val = UPT_SP(regs); break; \
 159                 case EAX: val = UPT_EAX(regs); break; \
 160                 case EBX: val = UPT_EBX(regs); break; \
 161                 case ECX: val = UPT_ECX(regs); break; \
 162                 case EDX: val = UPT_EDX(regs); break; \
 163                 case ESI: val = UPT_ESI(regs); break; \
 164                 case EDI: val = UPT_EDI(regs); break; \
 165                 case EBP: val = UPT_EBP(regs); break; \
 166                 case ORIG_EAX: val = UPT_ORIG_EAX(regs); break; \
 167                 case CS: val = UPT_CS(regs); break; \
 168                 case SS: val = UPT_SS(regs); break; \
 169                 case DS: val = UPT_DS(regs); break; \
 170                 case ES: val = UPT_ES(regs); break; \
 171                 case FS: val = UPT_FS(regs); break; \
 172                 case GS: val = UPT_GS(regs); break; \
 173                 case EFL: val = UPT_EFLAGS(regs); break; \
 174                 default :  \
 175                         panic("Bad register in UPT_REG : %d\n", reg);  \
 176                         val = -1; \
 177                 } \
 178                 val; \
 179         })
 180
 181
 182 #define UPT_SET(regs, reg, val) \
 183         do { \
 184                 switch(reg){ \
 185                 case EIP: UPT_IP(regs) = val; break; \
 186                 case UESP: UPT_SP(regs) = val; break; \
 187                 case EAX: UPT_EAX(regs) = val; break; \
 188                 case EBX: UPT_EBX(regs) = val; break; \
 189                 case ECX: UPT_ECX(regs) = val; break; \
 190                 case EDX: UPT_EDX(regs) = val; break; \
 191                 case ESI: UPT_ESI(regs) = val; break; \
 192                 case EDI: UPT_EDI(regs) = val; break; \
 193                 case EBP: UPT_EBP(regs) = val; break; \
 194                 case ORIG_EAX: UPT_ORIG_EAX(regs) = val; break; \
 195                 case CS: UPT_CS(regs) = val; break; \
 196                 case SS: UPT_SS(regs) = val; break; \
 197                 case DS: UPT_DS(regs) = val; break; \
 198                 case ES: UPT_ES(regs) = val; break; \
 199                 case FS: UPT_FS(regs) = val; break; \
 200                 case GS: UPT_GS(regs) = val; break; \
 201                 case EFL: UPT_EFLAGS(regs) = val; break; \
 202                 default :  \
 203                         panic("Bad register in UPT_SET : %d\n", reg);  \
 204                         break; \
 205                 } \
 206         } while (0)
 207
 208 #define UPT_SET_SYSCALL_RETURN(r, res) \
 209         CHOOSE_MODE(SC_SET_SYSCALL_RETURN(UPT_SC(r), (res)), \
 210                     REGS_SET_SYSCALL_RETURN((r)->skas.regs, (res)))
 211
 212 #define UPT_RESTART_SYSCALL(r) \
 213         CHOOSE_MODE(SC_RESTART_SYSCALL(UPT_SC(r)), \
 214                     REGS_RESTART_SYSCALL((r)->skas.regs))
 215
 216 #define UPT_ORIG_SYSCALL(r) UPT_EAX(r)
 217 #define UPT_SYSCALL_NR(r) UPT_ORIG_EAX(r)
 218 #define UPT_SYSCALL_RET(r) UPT_EAX(r)
 219
 220 #define UPT_SEGV_IS_FIXABLE(r) \
 221         CHOOSE_MODE(SC_SEGV_IS_FIXABLE(UPT_SC(r)), \
 222                     REGS_SEGV_IS_FIXABLE(&r->skas))
 223
 224 #define UPT_FAULT_ADDR(r) \
 225         __CHOOSE_MODE(SC_FAULT_ADDR(UPT_SC(r)), REGS_FAULT_ADDR(&r->skas))
 226
 227 #define UPT_FAULT_WRITE(r) \
 228         CHOOSE_MODE(SC_FAULT_WRITE(UPT_SC(r)), REGS_FAULT_WRITE(&r->skas))
 229
 230 #endif
 231
 232 /*
 233  * Overrides for Emacs so that we follow Linus's tabbing style.
 234  * Emacs will notice this stuff at the end of the file and automatically
 235  * adjust the settings for this buffer only.  This must remain at the end
 236  * of the file.
 237  * ---------------------------------------------------------------------------
 238  * Local variables:
 239  * c-file-style: "linux"
 240  * End:
 241  */