um: Save FPU registers between task switches
[linux-2.6.git] / arch / um / sys-x86_64 / shared / sysdep / 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 "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 #include "skas_ptregs.h"
18
19 #define REGS_IP(r) ((r)[HOST_IP])
20 #define REGS_SP(r) ((r)[HOST_SP])
21
22 #define REGS_RBX(r) ((r)[HOST_RBX])
23 #define REGS_RCX(r) ((r)[HOST_RCX])
24 #define REGS_RDX(r) ((r)[HOST_RDX])
25 #define REGS_RSI(r) ((r)[HOST_RSI])
26 #define REGS_RDI(r) ((r)[HOST_RDI])
27 #define REGS_RBP(r) ((r)[HOST_RBP])
28 #define REGS_RAX(r) ((r)[HOST_RAX])
29 #define REGS_R8(r) ((r)[HOST_R8])
30 #define REGS_R9(r) ((r)[HOST_R9])
31 #define REGS_R10(r) ((r)[HOST_R10])
32 #define REGS_R11(r) ((r)[HOST_R11])
33 #define REGS_R12(r) ((r)[HOST_R12])
34 #define REGS_R13(r) ((r)[HOST_R13])
35 #define REGS_R14(r) ((r)[HOST_R14])
36 #define REGS_R15(r) ((r)[HOST_R15])
37 #define REGS_CS(r) ((r)[HOST_CS])
38 #define REGS_EFLAGS(r) ((r)[HOST_EFLAGS])
39 #define REGS_SS(r) ((r)[HOST_SS])
40
41 #define HOST_FS_BASE 21
42 #define HOST_GS_BASE 22
43 #define HOST_DS 23
44 #define HOST_ES 24
45 #define HOST_FS 25
46 #define HOST_GS 26
47
48 /* Also defined in asm/ptrace-x86_64.h, but not in libc headers.  So, these
49  * are already defined for kernel code, but not for userspace code.
50  */
51 #ifndef FS_BASE
52 /* These aren't defined in ptrace.h, but exist in struct user_regs_struct,
53  * which is what x86_64 ptrace actually uses.
54  */
55 #define FS_BASE (HOST_FS_BASE * sizeof(long))
56 #define GS_BASE (HOST_GS_BASE * sizeof(long))
57 #define DS (HOST_DS * sizeof(long))
58 #define ES (HOST_ES * sizeof(long))
59 #define FS (HOST_FS * sizeof(long))
60 #define GS (HOST_GS * sizeof(long))
61 #endif
62
63 #define REGS_FS_BASE(r) ((r)[HOST_FS_BASE])
64 #define REGS_GS_BASE(r) ((r)[HOST_GS_BASE])
65 #define REGS_DS(r) ((r)[HOST_DS])
66 #define REGS_ES(r) ((r)[HOST_ES])
67 #define REGS_FS(r) ((r)[HOST_FS])
68 #define REGS_GS(r) ((r)[HOST_GS])
69
70 #define REGS_ORIG_RAX(r) ((r)[HOST_ORIG_RAX])
71
72 #define REGS_SET_SYSCALL_RETURN(r, res) REGS_RAX(r) = (res)
73
74 #define REGS_RESTART_SYSCALL(r) IP_RESTART_SYSCALL(REGS_IP(r))
75
76 #define REGS_SEGV_IS_FIXABLE(r) SEGV_IS_FIXABLE((r)->trap_type)
77
78 #define REGS_FAULT_ADDR(r) ((r)->fault_addr)
79
80 #define REGS_FAULT_WRITE(r) FAULT_WRITE((r)->fault_type)
81
82 #define REGS_TRAP(r) ((r)->trap_type)
83
84 #define REGS_ERR(r) ((r)->fault_type)
85
86 struct uml_pt_regs {
87         unsigned long gp[MAX_REG_NR];
88         unsigned long fp[HOST_FP_SIZE];
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