1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
/*
* Copyright (c) 2002-2005 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Ali Saidi
* Nathan Binkert
*/
#include <sys/signal.h>
#include "arch/alpha/ev5.hh"
#include "arch/alpha/system.hh"
#include "arch/vtophys.hh"
#include "base/loader/object_file.hh"
#include "base/loader/symtab.hh"
#include "base/trace.hh"
#include "debug/Loader.hh"
#include "mem/physical.hh"
#include "mem/vport.hh"
#include "params/AlphaSystem.hh"
#include "sim/byteswap.hh"
using namespace AlphaISA;
AlphaSystem::AlphaSystem(Params *p)
: System(p)
{
consoleSymtab = new SymbolTable;
palSymtab = new SymbolTable;
/**
* Load the pal, and console code into memory
*/
// Load Console Code
console = createObjectFile(params()->console);
if (console == NULL)
fatal("Could not load console file %s", params()->console);
// Load pal file
pal = createObjectFile(params()->pal);
if (pal == NULL)
fatal("Could not load PALcode file %s", params()->pal);
// Load program sections into memory
pal->loadSections(functionalPort, loadAddrMask);
console->loadSections(functionalPort, loadAddrMask);
// load symbols
if (!console->loadGlobalSymbols(consoleSymtab))
panic("could not load console symbols\n");
if (!pal->loadGlobalSymbols(palSymtab))
panic("could not load pal symbols\n");
if (!pal->loadLocalSymbols(palSymtab))
panic("could not load pal symbols\n");
if (!console->loadGlobalSymbols(debugSymbolTable))
panic("could not load console symbols\n");
if (!pal->loadGlobalSymbols(debugSymbolTable))
panic("could not load pal symbols\n");
if (!pal->loadLocalSymbols(debugSymbolTable))
panic("could not load pal symbols\n");
Addr addr = 0;
#ifndef NDEBUG
consolePanicEvent = addConsoleFuncEvent<BreakPCEvent>("panic");
#endif
/**
* Copy the osflags (kernel arguments) into the consoles
* memory. (Presently Linux does not use the console service
* routine to get these command line arguments, but Tru64 and
* others do.)
*/
if (consoleSymtab->findAddress("env_booted_osflags", addr)) {
virtPort->writeBlob(addr, (uint8_t*)params()->boot_osflags.c_str(),
strlen(params()->boot_osflags.c_str()));
}
/**
* Set the hardware reset parameter block system type and revision
* information to Tsunami.
*/
if (consoleSymtab->findAddress("m5_rpb", addr)) {
uint64_t data;
data = htog(params()->system_type);
virtPort->write(addr+0x50, data);
data = htog(params()->system_rev);
virtPort->write(addr+0x58, data);
} else
panic("could not find hwrpb\n");
}
AlphaSystem::~AlphaSystem()
{
delete consoleSymtab;
delete console;
delete pal;
#ifdef DEBUG
delete consolePanicEvent;
#endif
}
/**
* This function fixes up addresses that are used to match PCs for
* hooking simulator events on to target function executions.
*
* Alpha binaries may have multiple global offset table (GOT)
* sections. A function that uses the GOT starts with a
* two-instruction prolog which sets the global pointer (gp == r29) to
* the appropriate GOT section. The proper gp value is calculated
* based on the function address, which must be passed by the caller
* in the procedure value register (pv aka t12 == r27). This sequence
* looks like the following:
*
* opcode Ra Rb offset
* ldah gp,X(pv) 09 29 27 X
* lda gp,Y(gp) 08 29 29 Y
*
* for some constant offsets X and Y. The catch is that the linker
* (or maybe even the compiler, I'm not sure) may recognize that the
* caller and callee are using the same GOT section, making this
* prolog redundant, and modify the call target to skip these
* instructions. If we check for execution of the first instruction
* of a function (the one the symbol points to) to detect when to skip
* it, we'll miss all these modified calls. It might work to
* unconditionally check for the third instruction, but not all
* functions have this prolog, and there's some chance that those
* first two instructions could have undesired consequences. So we do
* the Right Thing and pattern-match the first two instructions of the
* function to decide where to patch.
*
* Eventually this code should be moved into an ISA-specific file.
*/
Addr
AlphaSystem::fixFuncEventAddr(Addr addr)
{
// mask for just the opcode, Ra, and Rb fields (not the offset)
const uint32_t inst_mask = 0xffff0000;
// ldah gp,X(pv): opcode 9, Ra = 29, Rb = 27
const uint32_t gp_ldah_pattern = (9 << 26) | (29 << 21) | (27 << 16);
// lda gp,Y(gp): opcode 8, Ra = 29, rb = 29
const uint32_t gp_lda_pattern = (8 << 26) | (29 << 21) | (29 << 16);
uint32_t i1 = virtPort->read<uint32_t>(addr);
uint32_t i2 = virtPort->read<uint32_t>(addr + sizeof(MachInst));
if ((i1 & inst_mask) == gp_ldah_pattern &&
(i2 & inst_mask) == gp_lda_pattern) {
Addr new_addr = addr + 2 * sizeof(MachInst);
DPRINTF(Loader, "fixFuncEventAddr: %p -> %p", addr, new_addr);
return new_addr;
} else {
return addr;
}
}
void
AlphaSystem::setAlphaAccess(Addr access)
{
Addr addr = 0;
if (consoleSymtab->findAddress("m5AlphaAccess", addr)) {
virtPort->write(addr, htog(Phys2K0Seg(access)));
} else {
panic("could not find m5AlphaAccess\n");
}
}
void
AlphaSystem::serialize(std::ostream &os)
{
System::serialize(os);
consoleSymtab->serialize("console_symtab", os);
palSymtab->serialize("pal_symtab", os);
}
void
AlphaSystem::unserialize(Checkpoint *cp, const std::string §ion)
{
System::unserialize(cp,section);
consoleSymtab->unserialize("console_symtab", cp, section);
palSymtab->unserialize("pal_symtab", cp, section);
}
AlphaSystem *
AlphaSystemParams::create()
{
return new AlphaSystem(this);
}
|
