1/* 2 * Copyright (c) 2002-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Ali Saidi 29 * Nathan Binkert 30 */ 31
| 1/* 2 * Copyright (c) 2002-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Ali Saidi 29 * Nathan Binkert 30 */ 31
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| 32#include <sys/signal.h> 33
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32#include "arch/alpha/ev5.hh" 33#include "arch/alpha/system.hh" 34#include "arch/alpha/remote_gdb.hh" 35#include "arch/vtophys.hh" 36#include "base/loader/object_file.hh" 37#include "base/loader/symtab.hh" 38#include "base/trace.hh" 39#include "mem/physical.hh" 40#include "sim/byteswap.hh" 41#include "sim/builder.hh" 42 43 44using namespace LittleEndianGuest; 45 46AlphaSystem::AlphaSystem(Params *p) 47 : System(p) 48{ 49 consoleSymtab = new SymbolTable; 50 palSymtab = new SymbolTable; 51 52 53 /** 54 * Load the pal, and console code into memory 55 */ 56 // Load Console Code 57 console = createObjectFile(params()->console_path); 58 if (console == NULL) 59 fatal("Could not load console file %s", params()->console_path); 60 61 // Load pal file 62 pal = createObjectFile(params()->palcode); 63 if (pal == NULL) 64 fatal("Could not load PALcode file %s", params()->palcode); 65 66 67 // Load program sections into memory 68 pal->loadSections(&functionalPort, AlphaISA::LoadAddrMask); 69 console->loadSections(&functionalPort, AlphaISA::LoadAddrMask); 70 71 // load symbols 72 if (!console->loadGlobalSymbols(consoleSymtab)) 73 panic("could not load console symbols\n"); 74 75 if (!pal->loadGlobalSymbols(palSymtab)) 76 panic("could not load pal symbols\n"); 77 78 if (!pal->loadLocalSymbols(palSymtab)) 79 panic("could not load pal symbols\n"); 80 81 if (!console->loadGlobalSymbols(debugSymbolTable)) 82 panic("could not load console symbols\n"); 83 84 if (!pal->loadGlobalSymbols(debugSymbolTable)) 85 panic("could not load pal symbols\n"); 86 87 if (!pal->loadLocalSymbols(debugSymbolTable)) 88 panic("could not load pal symbols\n"); 89 90 Addr addr = 0; 91#ifndef NDEBUG 92 consolePanicEvent = addConsoleFuncEvent<BreakPCEvent>("panic"); 93#endif 94 95 /** 96 * Copy the osflags (kernel arguments) into the consoles 97 * memory. (Presently Linux does not use the console service 98 * routine to get these command line arguments, but Tru64 and 99 * others do.) 100 */ 101 if (consoleSymtab->findAddress("env_booted_osflags", addr)) { 102 virtPort.writeBlob(addr, (uint8_t*)params()->boot_osflags.c_str(), 103 strlen(params()->boot_osflags.c_str())); 104 } 105 106 /** 107 * Set the hardware reset parameter block system type and revision 108 * information to Tsunami. 109 */ 110 if (consoleSymtab->findAddress("m5_rpb", addr)) { 111 uint64_t data; 112 data = htog(params()->system_type); 113 virtPort.write(addr+0x50, data); 114 data = htog(params()->system_rev); 115 virtPort.write(addr+0x58, data); 116 } else 117 panic("could not find hwrpb\n"); 118 119} 120 121AlphaSystem::~AlphaSystem() 122{ 123 delete consoleSymtab; 124 delete console; 125 delete pal; 126#ifdef DEBUG 127 delete consolePanicEvent; 128#endif 129} 130 131/** 132 * This function fixes up addresses that are used to match PCs for 133 * hooking simulator events on to target function executions. 134 * 135 * Alpha binaries may have multiple global offset table (GOT) 136 * sections. A function that uses the GOT starts with a 137 * two-instruction prolog which sets the global pointer (gp == r29) to 138 * the appropriate GOT section. The proper gp value is calculated 139 * based on the function address, which must be passed by the caller 140 * in the procedure value register (pv aka t12 == r27). This sequence 141 * looks like the following: 142 * 143 * opcode Ra Rb offset 144 * ldah gp,X(pv) 09 29 27 X 145 * lda gp,Y(gp) 08 29 29 Y 146 * 147 * for some constant offsets X and Y. The catch is that the linker 148 * (or maybe even the compiler, I'm not sure) may recognize that the 149 * caller and callee are using the same GOT section, making this 150 * prolog redundant, and modify the call target to skip these 151 * instructions. If we check for execution of the first instruction 152 * of a function (the one the symbol points to) to detect when to skip 153 * it, we'll miss all these modified calls. It might work to 154 * unconditionally check for the third instruction, but not all 155 * functions have this prolog, and there's some chance that those 156 * first two instructions could have undesired consequences. So we do 157 * the Right Thing and pattern-match the first two instructions of the 158 * function to decide where to patch. 159 * 160 * Eventually this code should be moved into an ISA-specific file. 161 */ 162Addr 163AlphaSystem::fixFuncEventAddr(Addr addr) 164{ 165 // mask for just the opcode, Ra, and Rb fields (not the offset) 166 const uint32_t inst_mask = 0xffff0000; 167 // ldah gp,X(pv): opcode 9, Ra = 29, Rb = 27 168 const uint32_t gp_ldah_pattern = (9 << 26) | (29 << 21) | (27 << 16); 169 // lda gp,Y(gp): opcode 8, Ra = 29, rb = 29 170 const uint32_t gp_lda_pattern = (8 << 26) | (29 << 21) | (29 << 16); 171 172 uint32_t i1 = virtPort.read<uint32_t>(addr); 173 uint32_t i2 = virtPort.read<uint32_t>(addr + sizeof(AlphaISA::MachInst)); 174 175 if ((i1 & inst_mask) == gp_ldah_pattern && 176 (i2 & inst_mask) == gp_lda_pattern) { 177 Addr new_addr = addr + 2* sizeof(AlphaISA::MachInst); 178 DPRINTF(Loader, "fixFuncEventAddr: %p -> %p", addr, new_addr); 179 return new_addr; 180 } else { 181 return addr; 182 } 183} 184 185 186void 187AlphaSystem::setAlphaAccess(Addr access) 188{ 189 Addr addr = 0; 190 if (consoleSymtab->findAddress("m5AlphaAccess", addr)) { 191 virtPort.write(addr, htog(EV5::Phys2K0Seg(access))); 192 } else 193 panic("could not find m5AlphaAccess\n"); 194} 195 196bool 197AlphaSystem::breakpoint() 198{
| 34#include "arch/alpha/ev5.hh" 35#include "arch/alpha/system.hh" 36#include "arch/alpha/remote_gdb.hh" 37#include "arch/vtophys.hh" 38#include "base/loader/object_file.hh" 39#include "base/loader/symtab.hh" 40#include "base/trace.hh" 41#include "mem/physical.hh" 42#include "sim/byteswap.hh" 43#include "sim/builder.hh" 44 45 46using namespace LittleEndianGuest; 47 48AlphaSystem::AlphaSystem(Params *p) 49 : System(p) 50{ 51 consoleSymtab = new SymbolTable; 52 palSymtab = new SymbolTable; 53 54 55 /** 56 * Load the pal, and console code into memory 57 */ 58 // Load Console Code 59 console = createObjectFile(params()->console_path); 60 if (console == NULL) 61 fatal("Could not load console file %s", params()->console_path); 62 63 // Load pal file 64 pal = createObjectFile(params()->palcode); 65 if (pal == NULL) 66 fatal("Could not load PALcode file %s", params()->palcode); 67 68 69 // Load program sections into memory 70 pal->loadSections(&functionalPort, AlphaISA::LoadAddrMask); 71 console->loadSections(&functionalPort, AlphaISA::LoadAddrMask); 72 73 // load symbols 74 if (!console->loadGlobalSymbols(consoleSymtab)) 75 panic("could not load console symbols\n"); 76 77 if (!pal->loadGlobalSymbols(palSymtab)) 78 panic("could not load pal symbols\n"); 79 80 if (!pal->loadLocalSymbols(palSymtab)) 81 panic("could not load pal symbols\n"); 82 83 if (!console->loadGlobalSymbols(debugSymbolTable)) 84 panic("could not load console symbols\n"); 85 86 if (!pal->loadGlobalSymbols(debugSymbolTable)) 87 panic("could not load pal symbols\n"); 88 89 if (!pal->loadLocalSymbols(debugSymbolTable)) 90 panic("could not load pal symbols\n"); 91 92 Addr addr = 0; 93#ifndef NDEBUG 94 consolePanicEvent = addConsoleFuncEvent<BreakPCEvent>("panic"); 95#endif 96 97 /** 98 * Copy the osflags (kernel arguments) into the consoles 99 * memory. (Presently Linux does not use the console service 100 * routine to get these command line arguments, but Tru64 and 101 * others do.) 102 */ 103 if (consoleSymtab->findAddress("env_booted_osflags", addr)) { 104 virtPort.writeBlob(addr, (uint8_t*)params()->boot_osflags.c_str(), 105 strlen(params()->boot_osflags.c_str())); 106 } 107 108 /** 109 * Set the hardware reset parameter block system type and revision 110 * information to Tsunami. 111 */ 112 if (consoleSymtab->findAddress("m5_rpb", addr)) { 113 uint64_t data; 114 data = htog(params()->system_type); 115 virtPort.write(addr+0x50, data); 116 data = htog(params()->system_rev); 117 virtPort.write(addr+0x58, data); 118 } else 119 panic("could not find hwrpb\n"); 120 121} 122 123AlphaSystem::~AlphaSystem() 124{ 125 delete consoleSymtab; 126 delete console; 127 delete pal; 128#ifdef DEBUG 129 delete consolePanicEvent; 130#endif 131} 132 133/** 134 * This function fixes up addresses that are used to match PCs for 135 * hooking simulator events on to target function executions. 136 * 137 * Alpha binaries may have multiple global offset table (GOT) 138 * sections. A function that uses the GOT starts with a 139 * two-instruction prolog which sets the global pointer (gp == r29) to 140 * the appropriate GOT section. The proper gp value is calculated 141 * based on the function address, which must be passed by the caller 142 * in the procedure value register (pv aka t12 == r27). This sequence 143 * looks like the following: 144 * 145 * opcode Ra Rb offset 146 * ldah gp,X(pv) 09 29 27 X 147 * lda gp,Y(gp) 08 29 29 Y 148 * 149 * for some constant offsets X and Y. The catch is that the linker 150 * (or maybe even the compiler, I'm not sure) may recognize that the 151 * caller and callee are using the same GOT section, making this 152 * prolog redundant, and modify the call target to skip these 153 * instructions. If we check for execution of the first instruction 154 * of a function (the one the symbol points to) to detect when to skip 155 * it, we'll miss all these modified calls. It might work to 156 * unconditionally check for the third instruction, but not all 157 * functions have this prolog, and there's some chance that those 158 * first two instructions could have undesired consequences. So we do 159 * the Right Thing and pattern-match the first two instructions of the 160 * function to decide where to patch. 161 * 162 * Eventually this code should be moved into an ISA-specific file. 163 */ 164Addr 165AlphaSystem::fixFuncEventAddr(Addr addr) 166{ 167 // mask for just the opcode, Ra, and Rb fields (not the offset) 168 const uint32_t inst_mask = 0xffff0000; 169 // ldah gp,X(pv): opcode 9, Ra = 29, Rb = 27 170 const uint32_t gp_ldah_pattern = (9 << 26) | (29 << 21) | (27 << 16); 171 // lda gp,Y(gp): opcode 8, Ra = 29, rb = 29 172 const uint32_t gp_lda_pattern = (8 << 26) | (29 << 21) | (29 << 16); 173 174 uint32_t i1 = virtPort.read<uint32_t>(addr); 175 uint32_t i2 = virtPort.read<uint32_t>(addr + sizeof(AlphaISA::MachInst)); 176 177 if ((i1 & inst_mask) == gp_ldah_pattern && 178 (i2 & inst_mask) == gp_lda_pattern) { 179 Addr new_addr = addr + 2* sizeof(AlphaISA::MachInst); 180 DPRINTF(Loader, "fixFuncEventAddr: %p -> %p", addr, new_addr); 181 return new_addr; 182 } else { 183 return addr; 184 } 185} 186 187 188void 189AlphaSystem::setAlphaAccess(Addr access) 190{ 191 Addr addr = 0; 192 if (consoleSymtab->findAddress("m5AlphaAccess", addr)) { 193 virtPort.write(addr, htog(EV5::Phys2K0Seg(access))); 194 } else 195 panic("could not find m5AlphaAccess\n"); 196} 197 198bool 199AlphaSystem::breakpoint() 200{
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199 return remoteGDB[0]->trap(ALPHA_KENTRY_INT);
| 201 return remoteGDB[0]->trap(SIGTRAP);
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200} 201 202void 203AlphaSystem::serialize(std::ostream &os) 204{ 205 System::serialize(os); 206 consoleSymtab->serialize("console_symtab", os); 207 palSymtab->serialize("pal_symtab", os); 208} 209 210 211void 212AlphaSystem::unserialize(Checkpoint *cp, const std::string §ion) 213{ 214 System::unserialize(cp,section); 215 consoleSymtab->unserialize("console_symtab", cp, section); 216 palSymtab->unserialize("pal_symtab", cp, section); 217} 218 219 220BEGIN_DECLARE_SIM_OBJECT_PARAMS(AlphaSystem) 221 222 Param<Tick> boot_cpu_frequency; 223 SimObjectParam<PhysicalMemory *> physmem; 224 SimpleEnumParam<System::MemoryMode> mem_mode; 225 226 Param<std::string> kernel; 227 Param<std::string> console; 228 Param<std::string> pal; 229 230 Param<std::string> boot_osflags; 231 Param<std::string> readfile; 232 Param<std::string> symbolfile; 233 Param<unsigned int> init_param; 234 235 Param<uint64_t> system_type; 236 Param<uint64_t> system_rev; 237 238END_DECLARE_SIM_OBJECT_PARAMS(AlphaSystem) 239 240BEGIN_INIT_SIM_OBJECT_PARAMS(AlphaSystem) 241 242 INIT_PARAM(boot_cpu_frequency, "Frequency of the boot CPU"), 243 INIT_PARAM(physmem, "phsyical memory"), 244 INIT_ENUM_PARAM(mem_mode, "Memory Mode, (1=atomic, 2=timing)", 245 System::MemoryModeStrings), 246 INIT_PARAM(kernel, "file that contains the kernel code"), 247 INIT_PARAM(console, "file that contains the console code"), 248 INIT_PARAM(pal, "file that contains palcode"), 249 INIT_PARAM_DFLT(boot_osflags, "flags to pass to the kernel during boot", 250 "a"), 251 INIT_PARAM_DFLT(readfile, "file to read startup script from", ""), 252 INIT_PARAM_DFLT(symbolfile, "file to read symbols from", ""), 253 INIT_PARAM_DFLT(init_param, "numerical value to pass into simulator", 0), 254 INIT_PARAM_DFLT(system_type, "Type of system we are emulating", 34), 255 INIT_PARAM_DFLT(system_rev, "Revision of system we are emulating", 1<<10) 256 257END_INIT_SIM_OBJECT_PARAMS(AlphaSystem) 258 259CREATE_SIM_OBJECT(AlphaSystem) 260{ 261 AlphaSystem::Params *p = new AlphaSystem::Params; 262 p->name = getInstanceName(); 263 p->boot_cpu_frequency = boot_cpu_frequency; 264 p->physmem = physmem; 265 p->mem_mode = mem_mode; 266 p->kernel_path = kernel; 267 p->console_path = console; 268 p->palcode = pal; 269 p->boot_osflags = boot_osflags; 270 p->init_param = init_param; 271 p->readfile = readfile; 272 p->symbolfile = symbolfile; 273 p->system_type = system_type; 274 p->system_rev = system_rev; 275 return new AlphaSystem(p); 276} 277 278REGISTER_SIM_OBJECT("AlphaSystem", AlphaSystem) 279 280
| 202} 203 204void 205AlphaSystem::serialize(std::ostream &os) 206{ 207 System::serialize(os); 208 consoleSymtab->serialize("console_symtab", os); 209 palSymtab->serialize("pal_symtab", os); 210} 211 212 213void 214AlphaSystem::unserialize(Checkpoint *cp, const std::string §ion) 215{ 216 System::unserialize(cp,section); 217 consoleSymtab->unserialize("console_symtab", cp, section); 218 palSymtab->unserialize("pal_symtab", cp, section); 219} 220 221 222BEGIN_DECLARE_SIM_OBJECT_PARAMS(AlphaSystem) 223 224 Param<Tick> boot_cpu_frequency; 225 SimObjectParam<PhysicalMemory *> physmem; 226 SimpleEnumParam<System::MemoryMode> mem_mode; 227 228 Param<std::string> kernel; 229 Param<std::string> console; 230 Param<std::string> pal; 231 232 Param<std::string> boot_osflags; 233 Param<std::string> readfile; 234 Param<std::string> symbolfile; 235 Param<unsigned int> init_param; 236 237 Param<uint64_t> system_type; 238 Param<uint64_t> system_rev; 239 240END_DECLARE_SIM_OBJECT_PARAMS(AlphaSystem) 241 242BEGIN_INIT_SIM_OBJECT_PARAMS(AlphaSystem) 243 244 INIT_PARAM(boot_cpu_frequency, "Frequency of the boot CPU"), 245 INIT_PARAM(physmem, "phsyical memory"), 246 INIT_ENUM_PARAM(mem_mode, "Memory Mode, (1=atomic, 2=timing)", 247 System::MemoryModeStrings), 248 INIT_PARAM(kernel, "file that contains the kernel code"), 249 INIT_PARAM(console, "file that contains the console code"), 250 INIT_PARAM(pal, "file that contains palcode"), 251 INIT_PARAM_DFLT(boot_osflags, "flags to pass to the kernel during boot", 252 "a"), 253 INIT_PARAM_DFLT(readfile, "file to read startup script from", ""), 254 INIT_PARAM_DFLT(symbolfile, "file to read symbols from", ""), 255 INIT_PARAM_DFLT(init_param, "numerical value to pass into simulator", 0), 256 INIT_PARAM_DFLT(system_type, "Type of system we are emulating", 34), 257 INIT_PARAM_DFLT(system_rev, "Revision of system we are emulating", 1<<10) 258 259END_INIT_SIM_OBJECT_PARAMS(AlphaSystem) 260 261CREATE_SIM_OBJECT(AlphaSystem) 262{ 263 AlphaSystem::Params *p = new AlphaSystem::Params; 264 p->name = getInstanceName(); 265 p->boot_cpu_frequency = boot_cpu_frequency; 266 p->physmem = physmem; 267 p->mem_mode = mem_mode; 268 p->kernel_path = kernel; 269 p->console_path = console; 270 p->palcode = pal; 271 p->boot_osflags = boot_osflags; 272 p->init_param = init_param; 273 p->readfile = readfile; 274 p->symbolfile = symbolfile; 275 p->system_type = system_type; 276 p->system_rev = system_rev; 277 return new AlphaSystem(p); 278} 279 280REGISTER_SIM_OBJECT("AlphaSystem", AlphaSystem) 281 282
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