2 /*--------------------------------------------------------------------*/
3 /*--- Machine-related stuff. pub_tool_machine.h ---*/
4 /*--------------------------------------------------------------------*/
7 This file is part of Valgrind, a dynamic binary instrumentation
10 Copyright (C) 2000-2010 Julian Seward
13 This program is free software; you can redistribute it and/or
14 modify it under the terms of the GNU General Public License as
15 published by the Free Software Foundation; either version 2 of the
16 License, or (at your option) any later version.
18 This program is distributed in the hope that it will be useful, but
19 WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 General Public License for more details.
23 You should have received a copy of the GNU General Public License
24 along with this program; if not, write to the Free Software
25 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
28 The GNU General Public License is contained in the file COPYING.
31 #ifndef __PUB_TOOL_MACHINE_H
32 #define __PUB_TOOL_MACHINE_H
34 #if defined(VGP_x86_linux)
35 # define VG_MIN_INSTR_SZB 1 // min length of native instruction
36 # define VG_MAX_INSTR_SZB 16 // max length of native instruction
37 # define VG_CLREQ_SZB 14 // length of a client request, may
38 // be larger than VG_MAX_INSTR_SZB
39 # define VG_STACK_REDZONE_SZB 0 // number of addressable bytes below %RSP
41 #elif defined(VGP_amd64_linux)
42 # define VG_MIN_INSTR_SZB 1
43 # define VG_MAX_INSTR_SZB 16
44 # define VG_CLREQ_SZB 19
45 # define VG_STACK_REDZONE_SZB 128
47 #elif defined(VGP_ppc32_linux)
48 # define VG_MIN_INSTR_SZB 4
49 # define VG_MAX_INSTR_SZB 4
50 # define VG_CLREQ_SZB 20
51 # define VG_STACK_REDZONE_SZB 0
53 #elif defined(VGP_ppc64_linux)
54 # define VG_MIN_INSTR_SZB 4
55 # define VG_MAX_INSTR_SZB 4
56 # define VG_CLREQ_SZB 20
57 # define VG_STACK_REDZONE_SZB 288 // number of addressable bytes below R1
58 // from 64-bit PowerPC ELF ABI
61 #elif defined(VGP_arm_linux)
62 # define VG_MIN_INSTR_SZB 2
63 # define VG_MAX_INSTR_SZB 4
64 # define VG_CLREQ_SZB 20
65 # define VG_STACK_REDZONE_SZB 0
67 #elif defined(VGP_ppc32_aix5)
68 # define VG_MIN_INSTR_SZB 4
69 # define VG_MAX_INSTR_SZB 4
70 # define VG_CLREQ_SZB 20
71 /* The PowerOpen ABI actually says 220 bytes, but that is not an
72 8-aligned number, and frequently forces Memcheck's
73 mc_{new,die}_mem_stack_N routines into slow cases by losing
74 8-alignment of the area to be messed with. So let's just say
75 224 instead. Gdb has a similar kludge. */
76 # define VG_STACK_REDZONE_SZB 224
78 #elif defined(VGP_ppc64_aix5)
79 # define VG_MIN_INSTR_SZB 4
80 # define VG_MAX_INSTR_SZB 4
81 # define VG_CLREQ_SZB 20
82 # define VG_STACK_REDZONE_SZB 288 // is this right?
84 #elif defined(VGP_s390x_linux)
85 # define VG_MIN_INSTR_SZB 2
86 # define VG_MAX_INSTR_SZB 6
87 # define VG_CLREQ_SZB 10
88 # define VG_STACK_REDZONE_SZB 0 // s390 has no redzone
90 #elif defined(VGP_x86_darwin)
91 # define VG_MIN_INSTR_SZB 1 // min length of native instruction
92 # define VG_MAX_INSTR_SZB 16 // max length of native instruction
93 # define VG_CLREQ_SZB 14 // length of a client request, may
94 // be larger than VG_MAX_INSTR_SZB
95 # define VG_STACK_REDZONE_SZB 0 // number of addressable bytes below %RSP
97 #elif defined(VGP_amd64_darwin)
98 # define VG_MIN_INSTR_SZB 1
99 # define VG_MAX_INSTR_SZB 16
100 # define VG_CLREQ_SZB 19
101 # define VG_STACK_REDZONE_SZB 128
103 #elif defined(VGP_x86_l4re)
104 # define VG_MIN_INSTR_SZB 1 // min length of native instruction
105 # define VG_MAX_INSTR_SZB 16 // max length of native instruction
106 # define VG_CLREQ_SZB 14 // length of a client request, may
107 // be larger than VG_MAX_INSTR_SZB
108 # define VG_STACK_REDZONE_SZB 0 // number of addressable bytes below %RSP
111 # error Unknown platform
114 // Guest state accessors
115 // Are mostly in the core_ header.
116 // Only these two are available to tools.
117 Addr VG_(get_IP) ( ThreadId tid );
118 Addr VG_(get_SP) ( ThreadId tid );
121 // For get/set, 'area' is where the asked-for guest state will be copied
122 // into/from. If shadowNo == 0, the real (non-shadow) guest state is
123 // accessed. If shadowNo == 1, the first shadow area is accessed, and
124 // if shadowNo == 2, the second shadow area is accessed. This gives a
125 // completely general way to read/modify a thread's guest register state
126 // providing you know the offsets you need.
128 VG_(get_shadow_regs_area) ( ThreadId tid,
130 /*SRC*/Int shadowNo, PtrdiffT offset, SizeT size );
132 VG_(set_shadow_regs_area) ( ThreadId tid,
133 /*DST*/Int shadowNo, PtrdiffT offset, SizeT size,
134 /*SRC*/const UChar* src );
136 // Sets the shadow values for the syscall return value register(s).
137 // This is platform specific.
138 void VG_(set_syscall_return_shadows) ( ThreadId tid,
139 /* shadow vals for the result */
140 UWord s1res, UWord s2res,
141 /* shadow vals for the error val */
142 UWord s1err, UWord s2err );
144 // Apply a function 'f' to all the general purpose registers in all the
146 // This is very Memcheck-specific -- it's used to find the roots when
147 // doing leak checking.
148 extern void VG_(apply_to_GP_regs)(void (*f)(UWord val));
150 // This iterator lets you inspect each live thread's stack bounds.
151 // Returns False at the end. 'tid' is the iterator and you can only
152 // safely change it by making calls to these functions.
153 extern void VG_(thread_stack_reset_iter) ( /*OUT*/ThreadId* tid );
154 extern Bool VG_(thread_stack_next) ( /*MOD*/ThreadId* tid,
155 /*OUT*/Addr* stack_min,
156 /*OUT*/Addr* stack_max );
158 // Returns .client_stack_highest_word for the given thread
159 extern Addr VG_(thread_get_stack_max) ( ThreadId tid );
161 // Returns how many bytes have been allocated for the stack of the given thread
162 extern SizeT VG_(thread_get_stack_size) ( ThreadId tid );
164 // Returns the bottommost address of the alternate signal stack.
165 // See also the man page of sigaltstack().
166 extern Addr VG_(thread_get_altstack_min) ( ThreadId tid );
168 // Returns how many bytes have been allocated for the alternate signal stack.
169 // See also the man page of sigaltstack().
170 extern SizeT VG_(thread_get_altstack_size) ( ThreadId tid );
172 // Given a pointer to a function as obtained by "& functionname" in C,
173 // produce a pointer to the actual entry point for the function. For
174 // most platforms it's the identity function. Unfortunately, on
175 // ppc64-linux it isn't (sigh).
176 extern void* VG_(fnptr_to_fnentry)( void* );
178 #endif // __PUB_TOOL_MACHINE_H
180 /*--------------------------------------------------------------------*/
182 /*--------------------------------------------------------------------*/