43418e7f81
The Process class is full of implementation details and structures related to SE Mode. This changeset factors out an internal class from Process and moves it into a separate file. The purpose behind doing this is to clean up the code and make it a bit more modular. Change-Id: Ic6941a1657751e8d51d5b6b1dcc04f1195884280 Reviewed-on: https://gem5-review.googlesource.com/2263 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
302 lines
11 KiB
C++
302 lines
11 KiB
C++
/*
|
|
* Copyright (c) 2007-2008 The Florida State University
|
|
* Copyright (c) 2009 The University of Edinburgh
|
|
* 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: Stephen Hines
|
|
* Timothy M. Jones
|
|
*/
|
|
|
|
#include "arch/power/process.hh"
|
|
|
|
#include "arch/power/isa_traits.hh"
|
|
#include "arch/power/types.hh"
|
|
#include "base/loader/elf_object.hh"
|
|
#include "base/loader/object_file.hh"
|
|
#include "base/misc.hh"
|
|
#include "cpu/thread_context.hh"
|
|
#include "debug/Stack.hh"
|
|
#include "mem/page_table.hh"
|
|
#include "sim/aux_vector.hh"
|
|
#include "sim/process_impl.hh"
|
|
#include "sim/syscall_return.hh"
|
|
#include "sim/system.hh"
|
|
|
|
using namespace std;
|
|
using namespace PowerISA;
|
|
|
|
PowerProcess::PowerProcess(ProcessParams *params, ObjectFile *objFile)
|
|
: Process(params, objFile)
|
|
{
|
|
// Set up break point (Top of Heap)
|
|
Addr brk_point = objFile->dataBase() + objFile->dataSize() +
|
|
objFile->bssSize();
|
|
brk_point = roundUp(brk_point, PageBytes);
|
|
|
|
Addr stack_base = 0xbf000000L;
|
|
|
|
Addr max_stack_size = 8 * 1024 * 1024;
|
|
|
|
// Set pointer for next thread stack. Reserve 8M for main stack.
|
|
Addr next_thread_stack_base = stack_base - max_stack_size;
|
|
|
|
// Set up region for mmaps. For now, start at bottom of kuseg space.
|
|
Addr mmap_end = 0x70000000L;
|
|
|
|
memState = make_shared<MemState>(brk_point, stack_base, max_stack_size,
|
|
next_thread_stack_base, mmap_end);
|
|
}
|
|
|
|
void
|
|
PowerProcess::initState()
|
|
{
|
|
Process::initState();
|
|
|
|
argsInit(MachineBytes, PageBytes);
|
|
}
|
|
|
|
void
|
|
PowerProcess::argsInit(int intSize, int pageSize)
|
|
{
|
|
typedef AuxVector<uint32_t> auxv_t;
|
|
std::vector<auxv_t> auxv;
|
|
|
|
string filename;
|
|
if (argv.size() < 1)
|
|
filename = "";
|
|
else
|
|
filename = argv[0];
|
|
|
|
//We want 16 byte alignment
|
|
uint64_t align = 16;
|
|
|
|
// Patch the ld_bias for dynamic executables.
|
|
updateBias();
|
|
|
|
// load object file into target memory
|
|
objFile->loadSections(initVirtMem);
|
|
|
|
//Setup the auxilliary vectors. These will already have endian conversion.
|
|
//Auxilliary vectors are loaded only for elf formatted executables.
|
|
ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile);
|
|
if (elfObject) {
|
|
uint32_t features = 0;
|
|
|
|
//Bits which describe the system hardware capabilities
|
|
//XXX Figure out what these should be
|
|
auxv.push_back(auxv_t(M5_AT_HWCAP, features));
|
|
//The system page size
|
|
auxv.push_back(auxv_t(M5_AT_PAGESZ, PowerISA::PageBytes));
|
|
//Frequency at which times() increments
|
|
auxv.push_back(auxv_t(M5_AT_CLKTCK, 0x64));
|
|
// For statically linked executables, this is the virtual address of the
|
|
// program header tables if they appear in the executable image
|
|
auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable()));
|
|
// This is the size of a program header entry from the elf file.
|
|
auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize()));
|
|
// This is the number of program headers from the original elf file.
|
|
auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount()));
|
|
// This is the base address of the ELF interpreter; it should be
|
|
// zero for static executables or contain the base address for
|
|
// dynamic executables.
|
|
auxv.push_back(auxv_t(M5_AT_BASE, getBias()));
|
|
//XXX Figure out what this should be.
|
|
auxv.push_back(auxv_t(M5_AT_FLAGS, 0));
|
|
//The entry point to the program
|
|
auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint()));
|
|
//Different user and group IDs
|
|
auxv.push_back(auxv_t(M5_AT_UID, uid()));
|
|
auxv.push_back(auxv_t(M5_AT_EUID, euid()));
|
|
auxv.push_back(auxv_t(M5_AT_GID, gid()));
|
|
auxv.push_back(auxv_t(M5_AT_EGID, egid()));
|
|
//Whether to enable "secure mode" in the executable
|
|
auxv.push_back(auxv_t(M5_AT_SECURE, 0));
|
|
//The filename of the program
|
|
auxv.push_back(auxv_t(M5_AT_EXECFN, 0));
|
|
//The string "v51" with unknown meaning
|
|
auxv.push_back(auxv_t(M5_AT_PLATFORM, 0));
|
|
}
|
|
|
|
//Figure out how big the initial stack nedes to be
|
|
|
|
// A sentry NULL void pointer at the top of the stack.
|
|
int sentry_size = intSize;
|
|
|
|
string platform = "v51";
|
|
int platform_size = platform.size() + 1;
|
|
|
|
// The aux vectors are put on the stack in two groups. The first group are
|
|
// the vectors that are generated as the elf is loaded. The second group
|
|
// are the ones that were computed ahead of time and include the platform
|
|
// string.
|
|
int aux_data_size = filename.size() + 1;
|
|
|
|
int env_data_size = 0;
|
|
for (int i = 0; i < envp.size(); ++i) {
|
|
env_data_size += envp[i].size() + 1;
|
|
}
|
|
int arg_data_size = 0;
|
|
for (int i = 0; i < argv.size(); ++i) {
|
|
arg_data_size += argv[i].size() + 1;
|
|
}
|
|
|
|
int info_block_size =
|
|
sentry_size + env_data_size + arg_data_size +
|
|
aux_data_size + platform_size;
|
|
|
|
//Each auxilliary vector is two 4 byte words
|
|
int aux_array_size = intSize * 2 * (auxv.size() + 1);
|
|
|
|
int envp_array_size = intSize * (envp.size() + 1);
|
|
int argv_array_size = intSize * (argv.size() + 1);
|
|
|
|
int argc_size = intSize;
|
|
|
|
//Figure out the size of the contents of the actual initial frame
|
|
int frame_size =
|
|
info_block_size +
|
|
aux_array_size +
|
|
envp_array_size +
|
|
argv_array_size +
|
|
argc_size;
|
|
|
|
//There needs to be padding after the auxiliary vector data so that the
|
|
//very bottom of the stack is aligned properly.
|
|
int partial_size = frame_size;
|
|
int aligned_partial_size = roundUp(partial_size, align);
|
|
int aux_padding = aligned_partial_size - partial_size;
|
|
|
|
int space_needed = frame_size + aux_padding;
|
|
|
|
Addr stack_min = memState->getStackBase() - space_needed;
|
|
stack_min = roundDown(stack_min, align);
|
|
|
|
memState->setStackSize(memState->getStackBase() - stack_min);
|
|
|
|
// map memory
|
|
allocateMem(roundDown(stack_min, pageSize),
|
|
roundUp(memState->getStackSize(), pageSize));
|
|
|
|
// map out initial stack contents
|
|
uint32_t sentry_base = memState->getStackBase() - sentry_size;
|
|
uint32_t aux_data_base = sentry_base - aux_data_size;
|
|
uint32_t env_data_base = aux_data_base - env_data_size;
|
|
uint32_t arg_data_base = env_data_base - arg_data_size;
|
|
uint32_t platform_base = arg_data_base - platform_size;
|
|
uint32_t auxv_array_base = platform_base - aux_array_size - aux_padding;
|
|
uint32_t envp_array_base = auxv_array_base - envp_array_size;
|
|
uint32_t argv_array_base = envp_array_base - argv_array_size;
|
|
uint32_t argc_base = argv_array_base - argc_size;
|
|
|
|
DPRINTF(Stack, "The addresses of items on the initial stack:\n");
|
|
DPRINTF(Stack, "0x%x - aux data\n", aux_data_base);
|
|
DPRINTF(Stack, "0x%x - env data\n", env_data_base);
|
|
DPRINTF(Stack, "0x%x - arg data\n", arg_data_base);
|
|
DPRINTF(Stack, "0x%x - platform base\n", platform_base);
|
|
DPRINTF(Stack, "0x%x - auxv array\n", auxv_array_base);
|
|
DPRINTF(Stack, "0x%x - envp array\n", envp_array_base);
|
|
DPRINTF(Stack, "0x%x - argv array\n", argv_array_base);
|
|
DPRINTF(Stack, "0x%x - argc \n", argc_base);
|
|
DPRINTF(Stack, "0x%x - stack min\n", stack_min);
|
|
|
|
// write contents to stack
|
|
|
|
// figure out argc
|
|
uint32_t argc = argv.size();
|
|
uint32_t guestArgc = PowerISA::htog(argc);
|
|
|
|
//Write out the sentry void *
|
|
uint32_t sentry_NULL = 0;
|
|
initVirtMem.writeBlob(sentry_base,
|
|
(uint8_t*)&sentry_NULL, sentry_size);
|
|
|
|
//Fix up the aux vectors which point to other data
|
|
for (int i = auxv.size() - 1; i >= 0; i--) {
|
|
if (auxv[i].a_type == M5_AT_PLATFORM) {
|
|
auxv[i].a_val = platform_base;
|
|
initVirtMem.writeString(platform_base, platform.c_str());
|
|
} else if (auxv[i].a_type == M5_AT_EXECFN) {
|
|
auxv[i].a_val = aux_data_base;
|
|
initVirtMem.writeString(aux_data_base, filename.c_str());
|
|
}
|
|
}
|
|
|
|
//Copy the aux stuff
|
|
for (int x = 0; x < auxv.size(); x++)
|
|
{
|
|
initVirtMem.writeBlob(auxv_array_base + x * 2 * intSize,
|
|
(uint8_t*)&(auxv[x].a_type), intSize);
|
|
initVirtMem.writeBlob(auxv_array_base + (x * 2 + 1) * intSize,
|
|
(uint8_t*)&(auxv[x].a_val), intSize);
|
|
}
|
|
//Write out the terminating zeroed auxilliary vector
|
|
const uint64_t zero = 0;
|
|
initVirtMem.writeBlob(auxv_array_base + 2 * intSize * auxv.size(),
|
|
(uint8_t*)&zero, 2 * intSize);
|
|
|
|
copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
|
|
copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
|
|
|
|
initVirtMem.writeBlob(argc_base, (uint8_t*)&guestArgc, intSize);
|
|
|
|
ThreadContext *tc = system->getThreadContext(contextIds[0]);
|
|
|
|
//Set the stack pointer register
|
|
tc->setIntReg(StackPointerReg, stack_min);
|
|
|
|
tc->pcState(getStartPC());
|
|
|
|
//Align the "stack_min" to a page boundary.
|
|
memState->setStackMin(roundDown(stack_min, pageSize));
|
|
}
|
|
|
|
PowerISA::IntReg
|
|
PowerProcess::getSyscallArg(ThreadContext *tc, int &i)
|
|
{
|
|
assert(i < 5);
|
|
return tc->readIntReg(ArgumentReg0 + i++);
|
|
}
|
|
|
|
void
|
|
PowerProcess::setSyscallArg(ThreadContext *tc, int i, PowerISA::IntReg val)
|
|
{
|
|
assert(i < 5);
|
|
tc->setIntReg(ArgumentReg0 + i, val);
|
|
}
|
|
|
|
void
|
|
PowerProcess::setSyscallReturn(ThreadContext *tc, SyscallReturn sysret)
|
|
{
|
|
Cr cr = tc->readIntReg(INTREG_CR);
|
|
if (sysret.successful()) {
|
|
cr.cr0.so = 0;
|
|
} else {
|
|
cr.cr0.so = 1;
|
|
}
|
|
tc->setIntReg(INTREG_CR, cr);
|
|
tc->setIntReg(ReturnValueReg, sysret.encodedValue());
|
|
}
|