1/*
2 * Copyright (c) 2007-2008 The Florida State University
3 * Copyright (c) 2009 The University of Edinburgh
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met: redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer;
10 * redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution;
13 * neither the name of the copyright holders nor the names of its
14 * contributors may be used to endorse or promote products derived from
15 * this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * Authors: Stephen Hines
30 * Timothy M. Jones
31 */
32
33#include "arch/power/process.hh"
34
35#include "arch/power/isa_traits.hh"
36#include "arch/power/types.hh"
37#include "base/loader/elf_object.hh"
38#include "base/loader/object_file.hh"
39#include "base/logging.hh"
40#include "cpu/thread_context.hh"
41#include "debug/Stack.hh"
42#include "mem/page_table.hh"
43#include "params/Process.hh"
44#include "sim/aux_vector.hh"
45#include "sim/process_impl.hh"
46#include "sim/syscall_return.hh"
47#include "sim/system.hh"
48
49using namespace std;
50using namespace PowerISA;
51
52PowerProcess::PowerProcess(ProcessParams *params, ObjectFile *objFile)
53 : Process(params,
54 new EmulationPageTable(params->name, params->pid, PageBytes),
55 objFile)
56{
57 fatal_if(params->useArchPT, "Arch page tables not implemented.");
58 // Set up break point (Top of Heap)
59 Addr brk_point = objFile->dataBase() + objFile->dataSize() +
60 objFile->bssSize();
61 brk_point = roundUp(brk_point, PageBytes);
62
63 Addr stack_base = 0xbf000000L;
64
65 Addr max_stack_size = 8 * 1024 * 1024;
66
67 // Set pointer for next thread stack. Reserve 8M for main stack.
68 Addr next_thread_stack_base = stack_base - max_stack_size;
69
70 // Set up region for mmaps. For now, start at bottom of kuseg space.
71 Addr mmap_end = 0x70000000L;
72
73 memState = make_shared<MemState>(brk_point, stack_base, max_stack_size,
74 next_thread_stack_base, mmap_end);
75}
76
77void
78PowerProcess::initState()
79{
80 Process::initState();
81
82 argsInit(MachineBytes, PageBytes);
83}
84
85void
86PowerProcess::argsInit(int intSize, int pageSize)
87{
88 typedef AuxVector<uint32_t> auxv_t;
89 std::vector<auxv_t> auxv;
90
91 string filename;
92 if (argv.size() < 1)
93 filename = "";
94 else
95 filename = argv[0];
96
97 //We want 16 byte alignment
98 uint64_t align = 16;
99
100 // Patch the ld_bias for dynamic executables.
101 updateBias();
102
103 // load object file into target memory
104 objFile->loadSections(initVirtMem);
105
106 //Setup the auxilliary vectors. These will already have endian conversion.
107 //Auxilliary vectors are loaded only for elf formatted executables.
108 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile);
109 if (elfObject) {
110 uint32_t features = 0;
111
112 //Bits which describe the system hardware capabilities
113 //XXX Figure out what these should be
114 auxv.push_back(auxv_t(M5_AT_HWCAP, features));
115 //The system page size
116 auxv.push_back(auxv_t(M5_AT_PAGESZ, PowerISA::PageBytes));
117 //Frequency at which times() increments
118 auxv.push_back(auxv_t(M5_AT_CLKTCK, 0x64));
119 // For statically linked executables, this is the virtual address of the
120 // program header tables if they appear in the executable image
121 auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable()));
122 // This is the size of a program header entry from the elf file.
123 auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize()));
124 // This is the number of program headers from the original elf file.
125 auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount()));
126 // This is the base address of the ELF interpreter; it should be
127 // zero for static executables or contain the base address for
128 // dynamic executables.
129 auxv.push_back(auxv_t(M5_AT_BASE, getBias()));
130 //XXX Figure out what this should be.
131 auxv.push_back(auxv_t(M5_AT_FLAGS, 0));
132 //The entry point to the program
133 auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint()));
134 //Different user and group IDs
135 auxv.push_back(auxv_t(M5_AT_UID, uid()));
136 auxv.push_back(auxv_t(M5_AT_EUID, euid()));
137 auxv.push_back(auxv_t(M5_AT_GID, gid()));
138 auxv.push_back(auxv_t(M5_AT_EGID, egid()));
139 //Whether to enable "secure mode" in the executable
140 auxv.push_back(auxv_t(M5_AT_SECURE, 0));
141 //The filename of the program
142 auxv.push_back(auxv_t(M5_AT_EXECFN, 0));
143 //The string "v51" with unknown meaning
144 auxv.push_back(auxv_t(M5_AT_PLATFORM, 0));
145 }
146
147 //Figure out how big the initial stack nedes to be
148
149 // A sentry NULL void pointer at the top of the stack.
150 int sentry_size = intSize;
151
152 string platform = "v51";
153 int platform_size = platform.size() + 1;
154
155 // The aux vectors are put on the stack in two groups. The first group are
156 // the vectors that are generated as the elf is loaded. The second group
157 // are the ones that were computed ahead of time and include the platform
158 // string.
159 int aux_data_size = filename.size() + 1;
160
161 int env_data_size = 0;
162 for (int i = 0; i < envp.size(); ++i) {
163 env_data_size += envp[i].size() + 1;
164 }
165 int arg_data_size = 0;
166 for (int i = 0; i < argv.size(); ++i) {
167 arg_data_size += argv[i].size() + 1;
168 }
169
170 int info_block_size =
171 sentry_size + env_data_size + arg_data_size +
172 aux_data_size + platform_size;
173
174 //Each auxilliary vector is two 4 byte words
175 int aux_array_size = intSize * 2 * (auxv.size() + 1);
176
177 int envp_array_size = intSize * (envp.size() + 1);
178 int argv_array_size = intSize * (argv.size() + 1);
179
180 int argc_size = intSize;
181
182 //Figure out the size of the contents of the actual initial frame
183 int frame_size =
184 info_block_size +
185 aux_array_size +
186 envp_array_size +
187 argv_array_size +
188 argc_size;
189
190 //There needs to be padding after the auxiliary vector data so that the
191 //very bottom of the stack is aligned properly.
192 int partial_size = frame_size;
193 int aligned_partial_size = roundUp(partial_size, align);
194 int aux_padding = aligned_partial_size - partial_size;
195
196 int space_needed = frame_size + aux_padding;
197
198 Addr stack_min = memState->getStackBase() - space_needed;
199 stack_min = roundDown(stack_min, align);
200
201 memState->setStackSize(memState->getStackBase() - stack_min);
202
203 // map memory
204 allocateMem(roundDown(stack_min, pageSize),
205 roundUp(memState->getStackSize(), pageSize));
206
207 // map out initial stack contents
208 uint32_t sentry_base = memState->getStackBase() - sentry_size;
209 uint32_t aux_data_base = sentry_base - aux_data_size;
210 uint32_t env_data_base = aux_data_base - env_data_size;
211 uint32_t arg_data_base = env_data_base - arg_data_size;
212 uint32_t platform_base = arg_data_base - platform_size;
213 uint32_t auxv_array_base = platform_base - aux_array_size - aux_padding;
214 uint32_t envp_array_base = auxv_array_base - envp_array_size;
215 uint32_t argv_array_base = envp_array_base - argv_array_size;
216 uint32_t argc_base = argv_array_base - argc_size;
217
218 DPRINTF(Stack, "The addresses of items on the initial stack:\n");
219 DPRINTF(Stack, "0x%x - aux data\n", aux_data_base);
220 DPRINTF(Stack, "0x%x - env data\n", env_data_base);
221 DPRINTF(Stack, "0x%x - arg data\n", arg_data_base);
222 DPRINTF(Stack, "0x%x - platform base\n", platform_base);
223 DPRINTF(Stack, "0x%x - auxv array\n", auxv_array_base);
224 DPRINTF(Stack, "0x%x - envp array\n", envp_array_base);
225 DPRINTF(Stack, "0x%x - argv array\n", argv_array_base);
226 DPRINTF(Stack, "0x%x - argc \n", argc_base);
227 DPRINTF(Stack, "0x%x - stack min\n", stack_min);
228
229 // write contents to stack
230
231 // figure out argc
232 uint32_t argc = argv.size();
233 uint32_t guestArgc = PowerISA::htog(argc);
234
235 //Write out the sentry void *
236 uint32_t sentry_NULL = 0;
237 initVirtMem.writeBlob(sentry_base,
238 (uint8_t*)&sentry_NULL, sentry_size);
239
240 //Fix up the aux vectors which point to other data
241 for (int i = auxv.size() - 1; i >= 0; i--) {
| 1/*
2 * Copyright (c) 2007-2008 The Florida State University
3 * Copyright (c) 2009 The University of Edinburgh
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met: redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer;
10 * redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution;
13 * neither the name of the copyright holders nor the names of its
14 * contributors may be used to endorse or promote products derived from
15 * this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * Authors: Stephen Hines
30 * Timothy M. Jones
31 */
32
33#include "arch/power/process.hh"
34
35#include "arch/power/isa_traits.hh"
36#include "arch/power/types.hh"
37#include "base/loader/elf_object.hh"
38#include "base/loader/object_file.hh"
39#include "base/logging.hh"
40#include "cpu/thread_context.hh"
41#include "debug/Stack.hh"
42#include "mem/page_table.hh"
43#include "params/Process.hh"
44#include "sim/aux_vector.hh"
45#include "sim/process_impl.hh"
46#include "sim/syscall_return.hh"
47#include "sim/system.hh"
48
49using namespace std;
50using namespace PowerISA;
51
52PowerProcess::PowerProcess(ProcessParams *params, ObjectFile *objFile)
53 : Process(params,
54 new EmulationPageTable(params->name, params->pid, PageBytes),
55 objFile)
56{
57 fatal_if(params->useArchPT, "Arch page tables not implemented.");
58 // Set up break point (Top of Heap)
59 Addr brk_point = objFile->dataBase() + objFile->dataSize() +
60 objFile->bssSize();
61 brk_point = roundUp(brk_point, PageBytes);
62
63 Addr stack_base = 0xbf000000L;
64
65 Addr max_stack_size = 8 * 1024 * 1024;
66
67 // Set pointer for next thread stack. Reserve 8M for main stack.
68 Addr next_thread_stack_base = stack_base - max_stack_size;
69
70 // Set up region for mmaps. For now, start at bottom of kuseg space.
71 Addr mmap_end = 0x70000000L;
72
73 memState = make_shared<MemState>(brk_point, stack_base, max_stack_size,
74 next_thread_stack_base, mmap_end);
75}
76
77void
78PowerProcess::initState()
79{
80 Process::initState();
81
82 argsInit(MachineBytes, PageBytes);
83}
84
85void
86PowerProcess::argsInit(int intSize, int pageSize)
87{
88 typedef AuxVector<uint32_t> auxv_t;
89 std::vector<auxv_t> auxv;
90
91 string filename;
92 if (argv.size() < 1)
93 filename = "";
94 else
95 filename = argv[0];
96
97 //We want 16 byte alignment
98 uint64_t align = 16;
99
100 // Patch the ld_bias for dynamic executables.
101 updateBias();
102
103 // load object file into target memory
104 objFile->loadSections(initVirtMem);
105
106 //Setup the auxilliary vectors. These will already have endian conversion.
107 //Auxilliary vectors are loaded only for elf formatted executables.
108 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile);
109 if (elfObject) {
110 uint32_t features = 0;
111
112 //Bits which describe the system hardware capabilities
113 //XXX Figure out what these should be
114 auxv.push_back(auxv_t(M5_AT_HWCAP, features));
115 //The system page size
116 auxv.push_back(auxv_t(M5_AT_PAGESZ, PowerISA::PageBytes));
117 //Frequency at which times() increments
118 auxv.push_back(auxv_t(M5_AT_CLKTCK, 0x64));
119 // For statically linked executables, this is the virtual address of the
120 // program header tables if they appear in the executable image
121 auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable()));
122 // This is the size of a program header entry from the elf file.
123 auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize()));
124 // This is the number of program headers from the original elf file.
125 auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount()));
126 // This is the base address of the ELF interpreter; it should be
127 // zero for static executables or contain the base address for
128 // dynamic executables.
129 auxv.push_back(auxv_t(M5_AT_BASE, getBias()));
130 //XXX Figure out what this should be.
131 auxv.push_back(auxv_t(M5_AT_FLAGS, 0));
132 //The entry point to the program
133 auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint()));
134 //Different user and group IDs
135 auxv.push_back(auxv_t(M5_AT_UID, uid()));
136 auxv.push_back(auxv_t(M5_AT_EUID, euid()));
137 auxv.push_back(auxv_t(M5_AT_GID, gid()));
138 auxv.push_back(auxv_t(M5_AT_EGID, egid()));
139 //Whether to enable "secure mode" in the executable
140 auxv.push_back(auxv_t(M5_AT_SECURE, 0));
141 //The filename of the program
142 auxv.push_back(auxv_t(M5_AT_EXECFN, 0));
143 //The string "v51" with unknown meaning
144 auxv.push_back(auxv_t(M5_AT_PLATFORM, 0));
145 }
146
147 //Figure out how big the initial stack nedes to be
148
149 // A sentry NULL void pointer at the top of the stack.
150 int sentry_size = intSize;
151
152 string platform = "v51";
153 int platform_size = platform.size() + 1;
154
155 // The aux vectors are put on the stack in two groups. The first group are
156 // the vectors that are generated as the elf is loaded. The second group
157 // are the ones that were computed ahead of time and include the platform
158 // string.
159 int aux_data_size = filename.size() + 1;
160
161 int env_data_size = 0;
162 for (int i = 0; i < envp.size(); ++i) {
163 env_data_size += envp[i].size() + 1;
164 }
165 int arg_data_size = 0;
166 for (int i = 0; i < argv.size(); ++i) {
167 arg_data_size += argv[i].size() + 1;
168 }
169
170 int info_block_size =
171 sentry_size + env_data_size + arg_data_size +
172 aux_data_size + platform_size;
173
174 //Each auxilliary vector is two 4 byte words
175 int aux_array_size = intSize * 2 * (auxv.size() + 1);
176
177 int envp_array_size = intSize * (envp.size() + 1);
178 int argv_array_size = intSize * (argv.size() + 1);
179
180 int argc_size = intSize;
181
182 //Figure out the size of the contents of the actual initial frame
183 int frame_size =
184 info_block_size +
185 aux_array_size +
186 envp_array_size +
187 argv_array_size +
188 argc_size;
189
190 //There needs to be padding after the auxiliary vector data so that the
191 //very bottom of the stack is aligned properly.
192 int partial_size = frame_size;
193 int aligned_partial_size = roundUp(partial_size, align);
194 int aux_padding = aligned_partial_size - partial_size;
195
196 int space_needed = frame_size + aux_padding;
197
198 Addr stack_min = memState->getStackBase() - space_needed;
199 stack_min = roundDown(stack_min, align);
200
201 memState->setStackSize(memState->getStackBase() - stack_min);
202
203 // map memory
204 allocateMem(roundDown(stack_min, pageSize),
205 roundUp(memState->getStackSize(), pageSize));
206
207 // map out initial stack contents
208 uint32_t sentry_base = memState->getStackBase() - sentry_size;
209 uint32_t aux_data_base = sentry_base - aux_data_size;
210 uint32_t env_data_base = aux_data_base - env_data_size;
211 uint32_t arg_data_base = env_data_base - arg_data_size;
212 uint32_t platform_base = arg_data_base - platform_size;
213 uint32_t auxv_array_base = platform_base - aux_array_size - aux_padding;
214 uint32_t envp_array_base = auxv_array_base - envp_array_size;
215 uint32_t argv_array_base = envp_array_base - argv_array_size;
216 uint32_t argc_base = argv_array_base - argc_size;
217
218 DPRINTF(Stack, "The addresses of items on the initial stack:\n");
219 DPRINTF(Stack, "0x%x - aux data\n", aux_data_base);
220 DPRINTF(Stack, "0x%x - env data\n", env_data_base);
221 DPRINTF(Stack, "0x%x - arg data\n", arg_data_base);
222 DPRINTF(Stack, "0x%x - platform base\n", platform_base);
223 DPRINTF(Stack, "0x%x - auxv array\n", auxv_array_base);
224 DPRINTF(Stack, "0x%x - envp array\n", envp_array_base);
225 DPRINTF(Stack, "0x%x - argv array\n", argv_array_base);
226 DPRINTF(Stack, "0x%x - argc \n", argc_base);
227 DPRINTF(Stack, "0x%x - stack min\n", stack_min);
228
229 // write contents to stack
230
231 // figure out argc
232 uint32_t argc = argv.size();
233 uint32_t guestArgc = PowerISA::htog(argc);
234
235 //Write out the sentry void *
236 uint32_t sentry_NULL = 0;
237 initVirtMem.writeBlob(sentry_base,
238 (uint8_t*)&sentry_NULL, sentry_size);
239
240 //Fix up the aux vectors which point to other data
241 for (int i = auxv.size() - 1; i >= 0; i--) {
|
258 }
259 //Write out the terminating zeroed auxilliary vector
260 const uint64_t zero = 0;
261 initVirtMem.writeBlob(auxv_array_base + 2 * intSize * auxv.size(),
262 (uint8_t*)&zero, 2 * intSize);
263
264 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
265 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
266
267 initVirtMem.writeBlob(argc_base, (uint8_t*)&guestArgc, intSize);
268
269 ThreadContext *tc = system->getThreadContext(contextIds[0]);
270
271 //Set the stack pointer register
272 tc->setIntReg(StackPointerReg, stack_min);
273
274 tc->pcState(getStartPC());
275
276 //Align the "stack_min" to a page boundary.
277 memState->setStackMin(roundDown(stack_min, pageSize));
278}
279
280PowerISA::IntReg
281PowerProcess::getSyscallArg(ThreadContext *tc, int &i)
282{
283 assert(i < 5);
284 return tc->readIntReg(ArgumentReg0 + i++);
285}
286
287void
288PowerProcess::setSyscallArg(ThreadContext *tc, int i, PowerISA::IntReg val)
289{
290 assert(i < 5);
291 tc->setIntReg(ArgumentReg0 + i, val);
292}
293
294void
295PowerProcess::setSyscallReturn(ThreadContext *tc, SyscallReturn sysret)
296{
297 Cr cr = tc->readIntReg(INTREG_CR);
298 if (sysret.successful()) {
299 cr.cr0.so = 0;
300 } else {
301 cr.cr0.so = 1;
302 }
303 tc->setIntReg(INTREG_CR, cr);
304 tc->setIntReg(ReturnValueReg, sysret.encodedValue());
305}
| 258 }
259 //Write out the terminating zeroed auxilliary vector
260 const uint64_t zero = 0;
261 initVirtMem.writeBlob(auxv_array_base + 2 * intSize * auxv.size(),
262 (uint8_t*)&zero, 2 * intSize);
263
264 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
265 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
266
267 initVirtMem.writeBlob(argc_base, (uint8_t*)&guestArgc, intSize);
268
269 ThreadContext *tc = system->getThreadContext(contextIds[0]);
270
271 //Set the stack pointer register
272 tc->setIntReg(StackPointerReg, stack_min);
273
274 tc->pcState(getStartPC());
275
276 //Align the "stack_min" to a page boundary.
277 memState->setStackMin(roundDown(stack_min, pageSize));
278}
279
280PowerISA::IntReg
281PowerProcess::getSyscallArg(ThreadContext *tc, int &i)
282{
283 assert(i < 5);
284 return tc->readIntReg(ArgumentReg0 + i++);
285}
286
287void
288PowerProcess::setSyscallArg(ThreadContext *tc, int i, PowerISA::IntReg val)
289{
290 assert(i < 5);
291 tc->setIntReg(ArgumentReg0 + i, val);
292}
293
294void
295PowerProcess::setSyscallReturn(ThreadContext *tc, SyscallReturn sysret)
296{
297 Cr cr = tc->readIntReg(INTREG_CR);
298 if (sysret.successful()) {
299 cr.cr0.so = 0;
300 } else {
301 cr.cr0.so = 1;
302 }
303 tc->setIntReg(INTREG_CR, cr);
304 tc->setIntReg(ReturnValueReg, sysret.encodedValue());
305}
|