arch/x86/um/shared/sysdep/ptrace_64.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 <generated/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 #define REGS_IP(r) ((r)[HOST_IP])
  18 #define REGS_SP(r) ((r)[HOST_SP])
  19
  20 #define REGS_RBX(r) ((r)[HOST_BX])
  21 #define REGS_RCX(r) ((r)[HOST_CX])
  22 #define REGS_RDX(r) ((r)[HOST_DX])
  23 #define REGS_RSI(r) ((r)[HOST_SI])
  24 #define REGS_RDI(r) ((r)[HOST_DI])
  25 #define REGS_RBP(r) ((r)[HOST_BP])
  26 #define REGS_RAX(r) ((r)[HOST_AX])
  27 #define REGS_R8(r) ((r)[HOST_R8])
  28 #define REGS_R9(r) ((r)[HOST_R9])
  29 #define REGS_R10(r) ((r)[HOST_R10])
  30 #define REGS_R11(r) ((r)[HOST_R11])
  31 #define REGS_R12(r) ((r)[HOST_R12])
  32 #define REGS_R13(r) ((r)[HOST_R13])
  33 #define REGS_R14(r) ((r)[HOST_R14])
  34 #define REGS_R15(r) ((r)[HOST_R15])
  35 #define REGS_CS(r) ((r)[HOST_CS])
  36 #define REGS_EFLAGS(r) ((r)[HOST_EFLAGS])
  37 #define REGS_SS(r) ((r)[HOST_SS])
  38
  39 #define HOST_FS_BASE 21
  40 #define HOST_GS_BASE 22
  41 #define HOST_DS 23
  42 #define HOST_ES 24
  43 #define HOST_FS 25
  44 #define HOST_GS 26
  45
  46 /* Also defined in asm/ptrace-x86_64.h, but not in libc headers.  So, these
  47  * are already defined for kernel code, but not for userspace code.
  48  */
  49 #ifndef FS_BASE
  50 /* These aren't defined in ptrace.h, but exist in struct user_regs_struct,
  51  * which is what x86_64 ptrace actually uses.
  52  */
  53 #define FS_BASE (HOST_FS_BASE * sizeof(long))
  54 #define GS_BASE (HOST_GS_BASE * sizeof(long))
  55 #define DS (HOST_DS * sizeof(long))
  56 #define ES (HOST_ES * sizeof(long))
  57 #define FS (HOST_FS * sizeof(long))
  58 #define GS (HOST_GS * sizeof(long))
  59 #endif
  60
  61 #define REGS_FS_BASE(r) ((r)[HOST_FS_BASE])
  62 #define REGS_GS_BASE(r) ((r)[HOST_GS_BASE])
  63 #define REGS_DS(r) ((r)[HOST_DS])
  64 #define REGS_ES(r) ((r)[HOST_ES])
  65 #define REGS_FS(r) ((r)[HOST_FS])
  66 #define REGS_GS(r) ((r)[HOST_GS])
  67
  68 #define REGS_ORIG_RAX(r) ((r)[HOST_ORIG_AX])
  69
  70 #define REGS_SET_SYSCALL_RETURN(r, res) REGS_RAX(r) = (res)
  71
  72 #define IP_RESTART_SYSCALL(ip) ((ip) -= 2)
  73 #define REGS_RESTART_SYSCALL(r) IP_RESTART_SYSCALL(REGS_IP(r))
  74
  75 #define REGS_FAULT_ADDR(r) ((r)->fault_addr)
  76
  77 #define REGS_FAULT_WRITE(r) FAULT_WRITE((r)->fault_type)
  78
  79 #define REGS_TRAP(r) ((r)->trap_type)
  80
  81 #define REGS_ERR(r) ((r)->fault_type)
  82
  83 struct uml_pt_regs {
  84         unsigned long gp[MAX_REG_NR];
  85         unsigned long fp[HOST_FP_SIZE];
  86         struct faultinfo faultinfo;
  87         long syscall;
  88         int is_user;
  89 };
  90
  91 #define EMPTY_UML_PT_REGS { }
  92
  93 #define UPT_RBX(r) REGS_RBX((r)->gp)
  94 #define UPT_RCX(r) REGS_RCX((r)->gp)
  95 #define UPT_RDX(r) REGS_RDX((r)->gp)
  96 #define UPT_RSI(r) REGS_RSI((r)->gp)
  97 #define UPT_RDI(r) REGS_RDI((r)->gp)
  98 #define UPT_RBP(r) REGS_RBP((r)->gp)
  99 #define UPT_RAX(r) REGS_RAX((r)->gp)
 100 #define UPT_R8(r) REGS_R8((r)->gp)
 101 #define UPT_R9(r) REGS_R9((r)->gp)
 102 #define UPT_R10(r) REGS_R10((r)->gp)
 103 #define UPT_R11(r) REGS_R11((r)->gp)
 104 #define UPT_R12(r) REGS_R12((r)->gp)
 105 #define UPT_R13(r) REGS_R13((r)->gp)
 106 #define UPT_R14(r) REGS_R14((r)->gp)
 107 #define UPT_R15(r) REGS_R15((r)->gp)
 108 #define UPT_CS(r) REGS_CS((r)->gp)
 109 #define UPT_FS_BASE(r) REGS_FS_BASE((r)->gp)
 110 #define UPT_FS(r) REGS_FS((r)->gp)
 111 #define UPT_GS_BASE(r) REGS_GS_BASE((r)->gp)
 112 #define UPT_GS(r) REGS_GS((r)->gp)
 113 #define UPT_DS(r) REGS_DS((r)->gp)
 114 #define UPT_ES(r) REGS_ES((r)->gp)
 115 #define UPT_CS(r) REGS_CS((r)->gp)
 116 #define UPT_SS(r) REGS_SS((r)->gp)
 117 #define UPT_ORIG_RAX(r) REGS_ORIG_RAX((r)->gp)
 118
 119 #define UPT_IP(r) REGS_IP((r)->gp)
 120 #define UPT_SP(r) REGS_SP((r)->gp)
 121
 122 #define UPT_EFLAGS(r) REGS_EFLAGS((r)->gp)
 123 #define UPT_SYSCALL_NR(r) ((r)->syscall)
 124 #define UPT_SYSCALL_RET(r) UPT_RAX(r)
 125
 126 extern int user_context(unsigned long sp);
 127
 128 #define UPT_IS_USER(r) ((r)->is_user)
 129
 130 #define UPT_SYSCALL_ARG1(r) UPT_RDI(r)
 131 #define UPT_SYSCALL_ARG2(r) UPT_RSI(r)
 132 #define UPT_SYSCALL_ARG3(r) UPT_RDX(r)
 133 #define UPT_SYSCALL_ARG4(r) UPT_R10(r)
 134 #define UPT_SYSCALL_ARG5(r) UPT_R8(r)
 135 #define UPT_SYSCALL_ARG6(r) UPT_R9(r)
 136
 137 struct syscall_args {
 138         unsigned long args[6];
 139 };
 140
 141 #define SYSCALL_ARGS(r) ((struct syscall_args) \
 142                          { .args = { UPT_SYSCALL_ARG1(r),        \
 143                                      UPT_SYSCALL_ARG2(r),        \
 144                                      UPT_SYSCALL_ARG3(r),        \
 145                                      UPT_SYSCALL_ARG4(r),        \
 146                                      UPT_SYSCALL_ARG5(r),        \
 147                                      UPT_SYSCALL_ARG6(r) } } )
 148
 149 #define UPT_RESTART_SYSCALL(r) REGS_RESTART_SYSCALL((r)->gp)
 150
 151 #define UPT_FAULTINFO(r) (&(r)->faultinfo)
 152
 153 static inline void arch_init_registers(int pid)
 154 {
 155 }
 156
 157 #endif