arch/um/sys-i386/shared/sysdep/ptrace.h

   1 /*
   2  * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
   3  * Licensed under the GPL
   4  */
   5
   6 #ifndef __SYSDEP_I386_PTRACE_H
   7 #define __SYSDEP_I386_PTRACE_H
   8
   9 #include "user_constants.h"
  10 #include "sysdep/faultinfo.h"
  11
  12 #define MAX_REG_NR (UM_FRAME_SIZE / sizeof(unsigned long))
  13 #define MAX_REG_OFFSET (UM_FRAME_SIZE)
  14
  15 static inline 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 #include "skas_ptregs.h"
  28
  29 #define REGS_IP(r) ((r)[HOST_IP])
  30 #define REGS_SP(r) ((r)[HOST_SP])
  31 #define REGS_EFLAGS(r) ((r)[HOST_EFLAGS])
  32 #define REGS_EAX(r) ((r)[HOST_EAX])
  33 #define REGS_EBX(r) ((r)[HOST_EBX])
  34 #define REGS_ECX(r) ((r)[HOST_ECX])
  35 #define REGS_EDX(r) ((r)[HOST_EDX])
  36 #define REGS_ESI(r) ((r)[HOST_ESI])
  37 #define REGS_EDI(r) ((r)[HOST_EDI])
  38 #define REGS_EBP(r) ((r)[HOST_EBP])
  39 #define REGS_CS(r) ((r)[HOST_CS])
  40 #define REGS_SS(r) ((r)[HOST_SS])
  41 #define REGS_DS(r) ((r)[HOST_DS])
  42 #define REGS_ES(r) ((r)[HOST_ES])
  43 #define REGS_FS(r) ((r)[HOST_FS])
  44 #define REGS_GS(r) ((r)[HOST_GS])
  45
  46 #define REGS_SET_SYSCALL_RETURN(r, res) REGS_EAX(r) = (res)
  47
  48 #define REGS_RESTART_SYSCALL(r) IP_RESTART_SYSCALL(REGS_IP(r))
  49
  50 #ifndef PTRACE_SYSEMU_SINGLESTEP
  51 #define PTRACE_SYSEMU_SINGLESTEP 32
  52 #endif
  53
  54 struct uml_pt_regs {
  55         unsigned long gp[MAX_REG_NR];
  56         struct faultinfo faultinfo;
  57         long syscall;
  58         int is_user;
  59 };
  60
  61 #define EMPTY_UML_PT_REGS { }
  62
  63 #define UPT_IP(r) REGS_IP((r)->gp)
  64 #define UPT_SP(r) REGS_SP((r)->gp)
  65 #define UPT_EFLAGS(r) REGS_EFLAGS((r)->gp)
  66 #define UPT_EAX(r) REGS_EAX((r)->gp)
  67 #define UPT_EBX(r) REGS_EBX((r)->gp)
  68 #define UPT_ECX(r) REGS_ECX((r)->gp)
  69 #define UPT_EDX(r) REGS_EDX((r)->gp)
  70 #define UPT_ESI(r) REGS_ESI((r)->gp)
  71 #define UPT_EDI(r) REGS_EDI((r)->gp)
  72 #define UPT_EBP(r) REGS_EBP((r)->gp)
  73 #define UPT_ORIG_EAX(r) ((r)->syscall)
  74 #define UPT_CS(r) REGS_CS((r)->gp)
  75 #define UPT_SS(r) REGS_SS((r)->gp)
  76 #define UPT_DS(r) REGS_DS((r)->gp)
  77 #define UPT_ES(r) REGS_ES((r)->gp)
  78 #define UPT_FS(r) REGS_FS((r)->gp)
  79 #define UPT_GS(r) REGS_GS((r)->gp)
  80
  81 #define UPT_SYSCALL_ARG1(r) UPT_EBX(r)
  82 #define UPT_SYSCALL_ARG2(r) UPT_ECX(r)
  83 #define UPT_SYSCALL_ARG3(r) UPT_EDX(r)
  84 #define UPT_SYSCALL_ARG4(r) UPT_ESI(r)
  85 #define UPT_SYSCALL_ARG5(r) UPT_EDI(r)
  86 #define UPT_SYSCALL_ARG6(r) UPT_EBP(r)
  87
  88 extern int user_context(unsigned long sp);
  89
  90 #define UPT_IS_USER(r) ((r)->is_user)
  91
  92 struct syscall_args {
  93         unsigned long args[6];
  94 };
  95
  96 #define SYSCALL_ARGS(r) ((struct syscall_args) \
  97                          { .args = { UPT_SYSCALL_ARG1(r),       \
  98                                      UPT_SYSCALL_ARG2(r),       \
  99                                      UPT_SYSCALL_ARG3(r),       \
 100                                      UPT_SYSCALL_ARG4(r),       \
 101                                      UPT_SYSCALL_ARG5(r),       \
 102                                      UPT_SYSCALL_ARG6(r) } } )
 103
 104 #define UPT_REG(regs, reg) \
 105         ({      unsigned long val; \
 106                 switch(reg){ \
 107                 case EIP: val = UPT_IP(regs); break; \
 108                 case UESP: val = UPT_SP(regs); break; \
 109                 case EAX: val = UPT_EAX(regs); break; \
 110                 case EBX: val = UPT_EBX(regs); break; \
 111                 case ECX: val = UPT_ECX(regs); break; \
 112                 case EDX: val = UPT_EDX(regs); break; \
 113                 case ESI: val = UPT_ESI(regs); break; \
 114                 case EDI: val = UPT_EDI(regs); break; \
 115                 case EBP: val = UPT_EBP(regs); break; \
 116                 case ORIG_EAX: val = UPT_ORIG_EAX(regs); break; \
 117                 case CS: val = UPT_CS(regs); break; \
 118                 case SS: val = UPT_SS(regs); break; \
 119                 case DS: val = UPT_DS(regs); break; \
 120                 case ES: val = UPT_ES(regs); break; \
 121                 case FS: val = UPT_FS(regs); break; \
 122                 case GS: val = UPT_GS(regs); break; \
 123                 case EFL: val = UPT_EFLAGS(regs); break; \
 124                 default :  \
 125                         panic("Bad register in UPT_REG : %d\n", reg);  \
 126                         val = -1; \
 127                 } \
 128                 val; \
 129         })
 130
 131 #define UPT_SET(regs, reg, val) \
 132         do { \
 133                 switch(reg){ \
 134                 case EIP: UPT_IP(regs) = val; break; \
 135                 case UESP: UPT_SP(regs) = val; break; \
 136                 case EAX: UPT_EAX(regs) = val; break; \
 137                 case EBX: UPT_EBX(regs) = val; break; \
 138                 case ECX: UPT_ECX(regs) = val; break; \
 139                 case EDX: UPT_EDX(regs) = val; break; \
 140                 case ESI: UPT_ESI(regs) = val; break; \
 141                 case EDI: UPT_EDI(regs) = val; break; \
 142                 case EBP: UPT_EBP(regs) = val; break; \
 143                 case ORIG_EAX: UPT_ORIG_EAX(regs) = val; break; \
 144                 case CS: UPT_CS(regs) = val; break; \
 145                 case SS: UPT_SS(regs) = val; break; \
 146                 case DS: UPT_DS(regs) = val; break; \
 147                 case ES: UPT_ES(regs) = val; break; \
 148                 case FS: UPT_FS(regs) = val; break; \
 149                 case GS: UPT_GS(regs) = val; break; \
 150                 case EFL: UPT_EFLAGS(regs) = val; break; \
 151                 default :  \
 152                         panic("Bad register in UPT_SET : %d\n", reg);  \
 153                         break; \
 154                 } \
 155         } while (0)
 156
 157 #define UPT_SET_SYSCALL_RETURN(r, res) \
 158         REGS_SET_SYSCALL_RETURN((r)->regs, (res))
 159
 160 #define UPT_RESTART_SYSCALL(r) REGS_RESTART_SYSCALL((r)->gp)
 161
 162 #define UPT_ORIG_SYSCALL(r) UPT_EAX(r)
 163 #define UPT_SYSCALL_NR(r) UPT_ORIG_EAX(r)
 164 #define UPT_SYSCALL_RET(r) UPT_EAX(r)
 165
 166 #define UPT_FAULTINFO(r) (&(r)->faultinfo)
 167
 168 extern void arch_init_registers(int pid);
 169
 170 #endif