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/isa_traits.hh"
34#include "arch/power/process.hh"
35#include "arch/power/types.hh"
36#include "base/loader/elf_object.hh"
37#include "base/loader/object_file.hh"
38#include "base/misc.hh"
39#include "cpu/thread_context.hh"
40#include "debug/Stack.hh"
41#include "mem/page_table.hh"
42#include "sim/process_impl.hh"
43#include "sim/system.hh"
44
45using namespace std;
46using namespace PowerISA;
47
48PowerLiveProcess::PowerLiveProcess(LiveProcessParams *params,
49 ObjectFile *objFile)
50 : LiveProcess(params, objFile)
51{
52 stack_base = 0xbf000000L;
53
54 // Set pointer for next thread stack. Reserve 8M for main stack.
55 next_thread_stack_base = stack_base - (8 * 1024 * 1024);
56
57 // Set up break point (Top of Heap)
58 brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize();
| 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/isa_traits.hh"
34#include "arch/power/process.hh"
35#include "arch/power/types.hh"
36#include "base/loader/elf_object.hh"
37#include "base/loader/object_file.hh"
38#include "base/misc.hh"
39#include "cpu/thread_context.hh"
40#include "debug/Stack.hh"
41#include "mem/page_table.hh"
42#include "sim/process_impl.hh"
43#include "sim/system.hh"
44
45using namespace std;
46using namespace PowerISA;
47
48PowerLiveProcess::PowerLiveProcess(LiveProcessParams *params,
49 ObjectFile *objFile)
50 : LiveProcess(params, objFile)
51{
52 stack_base = 0xbf000000L;
53
54 // Set pointer for next thread stack. Reserve 8M for main stack.
55 next_thread_stack_base = stack_base - (8 * 1024 * 1024);
56
57 // Set up break point (Top of Heap)
58 brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize();
|
102 //Frequency at which times() increments
103 auxv.push_back(auxv_t(M5_AT_CLKTCK, 0x64));
104 // For statically linked executables, this is the virtual address of the
105 // program header tables if they appear in the executable image
106 auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable()));
107 // This is the size of a program header entry from the elf file.
108 auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize()));
109 // This is the number of program headers from the original elf file.
110 auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount()));
111 //This is the address of the elf "interpreter", It should be set
112 //to 0 for regular executables. It should be something else
113 //(not sure what) for dynamic libraries.
114 auxv.push_back(auxv_t(M5_AT_BASE, 0));
115
116 //XXX Figure out what this should be.
117 auxv.push_back(auxv_t(M5_AT_FLAGS, 0));
118 //The entry point to the program
119 auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint()));
120 //Different user and group IDs
121 auxv.push_back(auxv_t(M5_AT_UID, uid()));
122 auxv.push_back(auxv_t(M5_AT_EUID, euid()));
123 auxv.push_back(auxv_t(M5_AT_GID, gid()));
124 auxv.push_back(auxv_t(M5_AT_EGID, egid()));
125 //Whether to enable "secure mode" in the executable
126 auxv.push_back(auxv_t(M5_AT_SECURE, 0));
127 //The filename of the program
128 auxv.push_back(auxv_t(M5_AT_EXECFN, 0));
129 //The string "v51" with unknown meaning
130 auxv.push_back(auxv_t(M5_AT_PLATFORM, 0));
131 }
132
133 //Figure out how big the initial stack nedes to be
134
135 // A sentry NULL void pointer at the top of the stack.
136 int sentry_size = intSize;
137
138 string platform = "v51";
139 int platform_size = platform.size() + 1;
140
141 // The aux vectors are put on the stack in two groups. The first group are
142 // the vectors that are generated as the elf is loaded. The second group
143 // are the ones that were computed ahead of time and include the platform
144 // string.
145 int aux_data_size = filename.size() + 1;
146
147 int env_data_size = 0;
148 for (int i = 0; i < envp.size(); ++i) {
149 env_data_size += envp[i].size() + 1;
150 }
151 int arg_data_size = 0;
152 for (int i = 0; i < argv.size(); ++i) {
153 arg_data_size += argv[i].size() + 1;
154 }
155
156 int info_block_size =
157 sentry_size + env_data_size + arg_data_size +
158 aux_data_size + platform_size;
159
160 //Each auxilliary vector is two 4 byte words
161 int aux_array_size = intSize * 2 * (auxv.size() + 1);
162
163 int envp_array_size = intSize * (envp.size() + 1);
164 int argv_array_size = intSize * (argv.size() + 1);
165
166 int argc_size = intSize;
167
168 //Figure out the size of the contents of the actual initial frame
169 int frame_size =
170 info_block_size +
171 aux_array_size +
172 envp_array_size +
173 argv_array_size +
174 argc_size;
175
176 //There needs to be padding after the auxiliary vector data so that the
177 //very bottom of the stack is aligned properly.
178 int partial_size = frame_size;
179 int aligned_partial_size = roundUp(partial_size, align);
180 int aux_padding = aligned_partial_size - partial_size;
181
182 int space_needed = frame_size + aux_padding;
183
184 stack_min = stack_base - space_needed;
185 stack_min = roundDown(stack_min, align);
186 stack_size = stack_base - stack_min;
187
188 // map memory
189 allocateMem(roundDown(stack_min, pageSize), roundUp(stack_size, pageSize));
190
191 // map out initial stack contents
192 uint32_t sentry_base = stack_base - sentry_size;
193 uint32_t aux_data_base = sentry_base - aux_data_size;
194 uint32_t env_data_base = aux_data_base - env_data_size;
195 uint32_t arg_data_base = env_data_base - arg_data_size;
196 uint32_t platform_base = arg_data_base - platform_size;
197 uint32_t auxv_array_base = platform_base - aux_array_size - aux_padding;
198 uint32_t envp_array_base = auxv_array_base - envp_array_size;
199 uint32_t argv_array_base = envp_array_base - argv_array_size;
200 uint32_t argc_base = argv_array_base - argc_size;
201
202 DPRINTF(Stack, "The addresses of items on the initial stack:\n");
203 DPRINTF(Stack, "0x%x - aux data\n", aux_data_base);
204 DPRINTF(Stack, "0x%x - env data\n", env_data_base);
205 DPRINTF(Stack, "0x%x - arg data\n", arg_data_base);
206 DPRINTF(Stack, "0x%x - platform base\n", platform_base);
207 DPRINTF(Stack, "0x%x - auxv array\n", auxv_array_base);
208 DPRINTF(Stack, "0x%x - envp array\n", envp_array_base);
209 DPRINTF(Stack, "0x%x - argv array\n", argv_array_base);
210 DPRINTF(Stack, "0x%x - argc \n", argc_base);
211 DPRINTF(Stack, "0x%x - stack min\n", stack_min);
212
213 // write contents to stack
214
215 // figure out argc
216 uint32_t argc = argv.size();
217 uint32_t guestArgc = PowerISA::htog(argc);
218
219 //Write out the sentry void *
220 uint32_t sentry_NULL = 0;
221 initVirtMem.writeBlob(sentry_base,
222 (uint8_t*)&sentry_NULL, sentry_size);
223
224 //Fix up the aux vectors which point to other data
225 for (int i = auxv.size() - 1; i >= 0; i--) {
226 if (auxv[i].a_type == M5_AT_PLATFORM) {
227 auxv[i].a_val = platform_base;
228 initVirtMem.writeString(platform_base, platform.c_str());
229 } else if (auxv[i].a_type == M5_AT_EXECFN) {
230 auxv[i].a_val = aux_data_base;
231 initVirtMem.writeString(aux_data_base, filename.c_str());
232 }
233 }
234
235 //Copy the aux stuff
236 for (int x = 0; x < auxv.size(); x++)
237 {
238 initVirtMem.writeBlob(auxv_array_base + x * 2 * intSize,
239 (uint8_t*)&(auxv[x].a_type), intSize);
240 initVirtMem.writeBlob(auxv_array_base + (x * 2 + 1) * intSize,
241 (uint8_t*)&(auxv[x].a_val), intSize);
242 }
243 //Write out the terminating zeroed auxilliary vector
244 const uint64_t zero = 0;
245 initVirtMem.writeBlob(auxv_array_base + 2 * intSize * auxv.size(),
246 (uint8_t*)&zero, 2 * intSize);
247
248 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
249 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
250
251 initVirtMem.writeBlob(argc_base, (uint8_t*)&guestArgc, intSize);
252
253 ThreadContext *tc = system->getThreadContext(contextIds[0]);
254
255 //Set the stack pointer register
256 tc->setIntReg(StackPointerReg, stack_min);
257
258 tc->pcState(objFile->entryPoint());
259
260 //Align the "stack_min" to a page boundary.
261 stack_min = roundDown(stack_min, pageSize);
262}
263
264PowerISA::IntReg
265PowerLiveProcess::getSyscallArg(ThreadContext *tc, int &i)
266{
267 assert(i < 5);
268 return tc->readIntReg(ArgumentReg0 + i++);
269}
270
271void
272PowerLiveProcess::setSyscallArg(ThreadContext *tc,
273 int i, PowerISA::IntReg val)
274{
275 assert(i < 5);
276 tc->setIntReg(ArgumentReg0 + i, val);
277}
278
279void
280PowerLiveProcess::setSyscallReturn(ThreadContext *tc, SyscallReturn sysret)
281{
282 Cr cr = tc->readIntReg(INTREG_CR);
283 if (sysret.successful()) {
284 cr.cr0.so = 0;
285 } else {
286 cr.cr0.so = 1;
287 }
288 tc->setIntReg(INTREG_CR, cr);
289 tc->setIntReg(ReturnValueReg, sysret.encodedValue());
290}
| 102 //Frequency at which times() increments
103 auxv.push_back(auxv_t(M5_AT_CLKTCK, 0x64));
104 // For statically linked executables, this is the virtual address of the
105 // program header tables if they appear in the executable image
106 auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable()));
107 // This is the size of a program header entry from the elf file.
108 auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize()));
109 // This is the number of program headers from the original elf file.
110 auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount()));
111 //This is the address of the elf "interpreter", It should be set
112 //to 0 for regular executables. It should be something else
113 //(not sure what) for dynamic libraries.
114 auxv.push_back(auxv_t(M5_AT_BASE, 0));
115
116 //XXX Figure out what this should be.
117 auxv.push_back(auxv_t(M5_AT_FLAGS, 0));
118 //The entry point to the program
119 auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint()));
120 //Different user and group IDs
121 auxv.push_back(auxv_t(M5_AT_UID, uid()));
122 auxv.push_back(auxv_t(M5_AT_EUID, euid()));
123 auxv.push_back(auxv_t(M5_AT_GID, gid()));
124 auxv.push_back(auxv_t(M5_AT_EGID, egid()));
125 //Whether to enable "secure mode" in the executable
126 auxv.push_back(auxv_t(M5_AT_SECURE, 0));
127 //The filename of the program
128 auxv.push_back(auxv_t(M5_AT_EXECFN, 0));
129 //The string "v51" with unknown meaning
130 auxv.push_back(auxv_t(M5_AT_PLATFORM, 0));
131 }
132
133 //Figure out how big the initial stack nedes to be
134
135 // A sentry NULL void pointer at the top of the stack.
136 int sentry_size = intSize;
137
138 string platform = "v51";
139 int platform_size = platform.size() + 1;
140
141 // The aux vectors are put on the stack in two groups. The first group are
142 // the vectors that are generated as the elf is loaded. The second group
143 // are the ones that were computed ahead of time and include the platform
144 // string.
145 int aux_data_size = filename.size() + 1;
146
147 int env_data_size = 0;
148 for (int i = 0; i < envp.size(); ++i) {
149 env_data_size += envp[i].size() + 1;
150 }
151 int arg_data_size = 0;
152 for (int i = 0; i < argv.size(); ++i) {
153 arg_data_size += argv[i].size() + 1;
154 }
155
156 int info_block_size =
157 sentry_size + env_data_size + arg_data_size +
158 aux_data_size + platform_size;
159
160 //Each auxilliary vector is two 4 byte words
161 int aux_array_size = intSize * 2 * (auxv.size() + 1);
162
163 int envp_array_size = intSize * (envp.size() + 1);
164 int argv_array_size = intSize * (argv.size() + 1);
165
166 int argc_size = intSize;
167
168 //Figure out the size of the contents of the actual initial frame
169 int frame_size =
170 info_block_size +
171 aux_array_size +
172 envp_array_size +
173 argv_array_size +
174 argc_size;
175
176 //There needs to be padding after the auxiliary vector data so that the
177 //very bottom of the stack is aligned properly.
178 int partial_size = frame_size;
179 int aligned_partial_size = roundUp(partial_size, align);
180 int aux_padding = aligned_partial_size - partial_size;
181
182 int space_needed = frame_size + aux_padding;
183
184 stack_min = stack_base - space_needed;
185 stack_min = roundDown(stack_min, align);
186 stack_size = stack_base - stack_min;
187
188 // map memory
189 allocateMem(roundDown(stack_min, pageSize), roundUp(stack_size, pageSize));
190
191 // map out initial stack contents
192 uint32_t sentry_base = stack_base - sentry_size;
193 uint32_t aux_data_base = sentry_base - aux_data_size;
194 uint32_t env_data_base = aux_data_base - env_data_size;
195 uint32_t arg_data_base = env_data_base - arg_data_size;
196 uint32_t platform_base = arg_data_base - platform_size;
197 uint32_t auxv_array_base = platform_base - aux_array_size - aux_padding;
198 uint32_t envp_array_base = auxv_array_base - envp_array_size;
199 uint32_t argv_array_base = envp_array_base - argv_array_size;
200 uint32_t argc_base = argv_array_base - argc_size;
201
202 DPRINTF(Stack, "The addresses of items on the initial stack:\n");
203 DPRINTF(Stack, "0x%x - aux data\n", aux_data_base);
204 DPRINTF(Stack, "0x%x - env data\n", env_data_base);
205 DPRINTF(Stack, "0x%x - arg data\n", arg_data_base);
206 DPRINTF(Stack, "0x%x - platform base\n", platform_base);
207 DPRINTF(Stack, "0x%x - auxv array\n", auxv_array_base);
208 DPRINTF(Stack, "0x%x - envp array\n", envp_array_base);
209 DPRINTF(Stack, "0x%x - argv array\n", argv_array_base);
210 DPRINTF(Stack, "0x%x - argc \n", argc_base);
211 DPRINTF(Stack, "0x%x - stack min\n", stack_min);
212
213 // write contents to stack
214
215 // figure out argc
216 uint32_t argc = argv.size();
217 uint32_t guestArgc = PowerISA::htog(argc);
218
219 //Write out the sentry void *
220 uint32_t sentry_NULL = 0;
221 initVirtMem.writeBlob(sentry_base,
222 (uint8_t*)&sentry_NULL, sentry_size);
223
224 //Fix up the aux vectors which point to other data
225 for (int i = auxv.size() - 1; i >= 0; i--) {
226 if (auxv[i].a_type == M5_AT_PLATFORM) {
227 auxv[i].a_val = platform_base;
228 initVirtMem.writeString(platform_base, platform.c_str());
229 } else if (auxv[i].a_type == M5_AT_EXECFN) {
230 auxv[i].a_val = aux_data_base;
231 initVirtMem.writeString(aux_data_base, filename.c_str());
232 }
233 }
234
235 //Copy the aux stuff
236 for (int x = 0; x < auxv.size(); x++)
237 {
238 initVirtMem.writeBlob(auxv_array_base + x * 2 * intSize,
239 (uint8_t*)&(auxv[x].a_type), intSize);
240 initVirtMem.writeBlob(auxv_array_base + (x * 2 + 1) * intSize,
241 (uint8_t*)&(auxv[x].a_val), intSize);
242 }
243 //Write out the terminating zeroed auxilliary vector
244 const uint64_t zero = 0;
245 initVirtMem.writeBlob(auxv_array_base + 2 * intSize * auxv.size(),
246 (uint8_t*)&zero, 2 * intSize);
247
248 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
249 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
250
251 initVirtMem.writeBlob(argc_base, (uint8_t*)&guestArgc, intSize);
252
253 ThreadContext *tc = system->getThreadContext(contextIds[0]);
254
255 //Set the stack pointer register
256 tc->setIntReg(StackPointerReg, stack_min);
257
258 tc->pcState(objFile->entryPoint());
259
260 //Align the "stack_min" to a page boundary.
261 stack_min = roundDown(stack_min, pageSize);
262}
263
264PowerISA::IntReg
265PowerLiveProcess::getSyscallArg(ThreadContext *tc, int &i)
266{
267 assert(i < 5);
268 return tc->readIntReg(ArgumentReg0 + i++);
269}
270
271void
272PowerLiveProcess::setSyscallArg(ThreadContext *tc,
273 int i, PowerISA::IntReg val)
274{
275 assert(i < 5);
276 tc->setIntReg(ArgumentReg0 + i, val);
277}
278
279void
280PowerLiveProcess::setSyscallReturn(ThreadContext *tc, SyscallReturn sysret)
281{
282 Cr cr = tc->readIntReg(INTREG_CR);
283 if (sysret.successful()) {
284 cr.cr0.so = 0;
285 } else {
286 cr.cr0.so = 1;
287 }
288 tc->setIntReg(INTREG_CR, cr);
289 tc->setIntReg(ReturnValueReg, sysret.encodedValue());
290}
|