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X86: Distinguish the width of values on the stack between 32 and 64 bit processes.

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This commit is contained in:
Gabe Black 2009-02-27 09:21:36 -08:00
parent 932f6440a1
commit 05de9f4e2c
4 changed files with 173 additions and 70 deletions
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13
src/arch/x86/linux/process.cc
View file

@ -64,25 +64,16 @@
#include "kern/linux/linux.hh"
#include "sim/process.hh"
#include "sim/syscall_emul.hh"
using namespace std;
using namespace X86ISA;
SyscallDesc*
X86LinuxProcess::getDesc(int callnum)
{
if (callnum < 0 || callnum >= Num_Syscall_Descs)
return NULL;
return &syscallDescs[callnum];
}
X86_64LinuxProcess::X86_64LinuxProcess(LiveProcessParams * params,
ObjectFile *objFile)
: X86LinuxProcess(params, objFile, syscallDescs, 273)
: X86_64LiveProcess(params, objFile, syscallDescs, 273)
{}
I386LinuxProcess::I386LinuxProcess(LiveProcessParams * params,
ObjectFile *objFile)
: X86LinuxProcess(params, objFile, syscallDescs, 324)
: I386LiveProcess(params, objFile, syscallDescs, 324)
{}

33
src/arch/x86/linux/process.hh
View file

@ -65,43 +65,26 @@
namespace X86ISA {
/// A process with emulated x86/Linux syscalls.
class X86LinuxProcess : public X86LiveProcess
class X86_64LinuxProcess : public X86_64LiveProcess
{
protected:
SyscallDesc *syscallDescs;
/// Array of syscall descriptors, indexed by call number.
static SyscallDesc syscallDescs[];
const int Num_Syscall_Descs;
/// Constructor.
X86LinuxProcess(LiveProcessParams * params, ObjectFile *objFile,
SyscallDesc *_syscallDescs, int numSyscallDescs) :
X86LiveProcess(params, objFile), syscallDescs(_syscallDescs),
Num_Syscall_Descs(numSyscallDescs)
{}
public:
SyscallDesc* getDesc(int callnum);
};
class X86_64LinuxProcess : public X86LinuxProcess
{
public:
/// Constructor.
X86_64LinuxProcess(LiveProcessParams * params, ObjectFile *objFile);
/// Array of syscall descriptors, indexed by call number.
static SyscallDesc syscallDescs[];
};
class I386LinuxProcess : public X86LinuxProcess
class I386LinuxProcess : public I386LiveProcess
{
protected:
/// Array of syscall descriptors, indexed by call number.
static SyscallDesc syscallDescs[];
public:
/// Constructor.
I386LinuxProcess(LiveProcessParams * params, ObjectFile *objFile);
/// Array of syscall descriptors, indexed by call number.
static SyscallDesc syscallDescs[];
};
} // namespace X86ISA

164
src/arch/x86/process.cc
View file

@ -98,48 +98,72 @@
#include "mem/page_table.hh"
#include "mem/translating_port.hh"
#include "sim/process_impl.hh"
#include "sim/syscall_emul.hh"
#include "sim/system.hh"
using namespace std;
using namespace X86ISA;
X86LiveProcess::X86LiveProcess(LiveProcessParams * params,
ObjectFile *objFile)
: LiveProcess(params, objFile)
X86LiveProcess::X86LiveProcess(LiveProcessParams * params, ObjectFile *objFile,
SyscallDesc *_syscallDescs, int _numSyscallDescs) :
LiveProcess(params, objFile), syscallDescs(_syscallDescs),
numSyscallDescs(_numSyscallDescs)
{
brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize();
brk_point = roundUp(brk_point, VMPageSize);
}
// Set pointer for next thread stack. Reserve 8M for main stack.
next_thread_stack_base = stack_base - (8 * 1024 * 1024);
X86_64LiveProcess::X86_64LiveProcess(LiveProcessParams *params,
ObjectFile *objFile, SyscallDesc *_syscallDescs,
int _numSyscallDescs) :
X86LiveProcess(params, objFile, _syscallDescs, _numSyscallDescs)
{
// Set up stack. On X86_64 Linux, stack goes from the top of memory
// downward, less the hole for the kernel address space plus one page
// for undertermined purposes.
stack_base = (Addr)0x7FFFFFFFF000ULL;
// Set pointer for next thread stack. Reserve 8M for main stack.
next_thread_stack_base = stack_base - (8 * 1024 * 1024);
// Set up region for mmaps. This was determined empirically and may not
// always be correct.
mmap_start = mmap_end = (Addr)0x2aaaaaaab000ULL;
}
void X86LiveProcess::handleTrap(int trapNum, ThreadContext *tc)
I386LiveProcess::I386LiveProcess(LiveProcessParams *params,
ObjectFile *objFile, SyscallDesc *_syscallDescs,
int _numSyscallDescs) :
X86LiveProcess(params, objFile, _syscallDescs, _numSyscallDescs)
{
switch(trapNum)
{
default:
panic("Unimplemented trap to operating system: trap number %#x.\n", trapNum);
}
stack_base = (Addr)0xffffe000ULL;
// Set pointer for next thread stack. Reserve 8M for main stack.
next_thread_stack_base = stack_base - (8 * 1024 * 1024);
// Set up region for mmaps. This was determined empirically and may not
// always be correct.
mmap_start = mmap_end = (Addr)0xf7ffd000ULL;
}
SyscallDesc*
X86LiveProcess::getDesc(int callnum)
{
if (callnum < 0 || callnum >= numSyscallDescs)
return NULL;
return &syscallDescs[callnum];
}
void
X86LiveProcess::startup()
X86_64LiveProcess::startup()
{
LiveProcess::startup();
if (checkpointRestored)
return;
argsInit(sizeof(IntReg), VMPageSize);
argsInit(sizeof(uint64_t), VMPageSize);
for (int i = 0; i < contextIds.size(); i++) {
ThreadContext * tc = system->getThreadContext(contextIds[i]);
@ -198,12 +222,80 @@ X86LiveProcess::startup()
}
void
X86LiveProcess::argsInit(int intSize, int pageSize)
I386LiveProcess::startup()
{
typedef AuxVector<uint64_t> auxv_t;
std::vector<auxv_t> auxv;
LiveProcess::startup();
Process::startup();
if (checkpointRestored)
return;
argsInit(sizeof(uint32_t), VMPageSize);
for (int i = 0; i < contextIds.size(); i++) {
ThreadContext * tc = system->getThreadContext(contextIds[i]);
SegAttr dataAttr = 0;
dataAttr.writable = 1;
dataAttr.readable = 1;
dataAttr.expandDown = 0;
dataAttr.dpl = 3;
dataAttr.defaultSize = 1;
dataAttr.longMode = 0;
//Initialize the segment registers.
for(int seg = 0; seg < NUM_SEGMENTREGS; seg++) {
tc->setMiscRegNoEffect(MISCREG_SEG_BASE(seg), 0);
tc->setMiscRegNoEffect(MISCREG_SEG_EFF_BASE(seg), 0);
tc->setMiscRegNoEffect(MISCREG_SEG_ATTR(seg), dataAttr);
tc->setMiscRegNoEffect(MISCREG_SEG_SEL(seg), 0xB);
}
SegAttr csAttr = 0;
csAttr.writable = 0;
csAttr.readable = 1;
csAttr.expandDown = 0;
csAttr.dpl = 3;
csAttr.defaultSize = 1;
csAttr.longMode = 0;
tc->setMiscRegNoEffect(MISCREG_CS_ATTR, csAttr);
//Set up the registers that describe the operating mode.
CR0 cr0 = 0;
cr0.pg = 1; // Turn on paging.
cr0.cd = 0; // Don't disable caching.
cr0.nw = 0; // This is bit is defined to be ignored.
cr0.am = 0; // No alignment checking
cr0.wp = 0; // Supervisor mode can write read only pages
cr0.ne = 1;
cr0.et = 1; // This should always be 1
cr0.ts = 0; // We don't do task switching, so causing fp exceptions
// would be pointless.
cr0.em = 0; // Allow x87 instructions to execute natively.
cr0.mp = 1; // This doesn't really matter, but the manual suggests
// setting it to one.
cr0.pe = 1; // We're definitely in protected mode.
tc->setMiscReg(MISCREG_CR0, cr0);
Efer efer = 0;
efer.sce = 1; // Enable system call extensions.
efer.lme = 1; // Enable long mode.
efer.lma = 0; // Deactivate long mode.
efer.nxe = 1; // Enable nx support.
efer.svme = 0; // Disable svm support for now. It isn't implemented.
efer.ffxsr = 1; // Turn on fast fxsave and fxrstor.
tc->setMiscReg(MISCREG_EFER, efer);
}
}
template<class IntType>
void
X86LiveProcess::argsInit(int pageSize)
{
int intSize = sizeof(IntType);
typedef AuxVector<IntType> auxv_t;
std::vector<auxv_t> auxv;
string filename;
if(argv.size() < 1)
@ -396,15 +488,15 @@ X86LiveProcess::argsInit(int intSize, int pageSize)
roundUp(stack_size, pageSize));
// map out initial stack contents
Addr sentry_base = stack_base - sentry_size;
Addr file_name_base = sentry_base - file_name_size;
Addr env_data_base = file_name_base - env_data_size;
Addr arg_data_base = env_data_base - arg_data_size;
Addr aux_data_base = arg_data_base - info_block_padding - aux_data_size;
Addr auxv_array_base = aux_data_base - aux_array_size - aux_padding;
Addr envp_array_base = auxv_array_base - envp_array_size;
Addr argv_array_base = envp_array_base - argv_array_size;
Addr argc_base = argv_array_base - argc_size;
IntType sentry_base = stack_base - sentry_size;
IntType file_name_base = sentry_base - file_name_size;
IntType env_data_base = file_name_base - env_data_size;
IntType arg_data_base = env_data_base - arg_data_size;
IntType aux_data_base = arg_data_base - info_block_padding - aux_data_size;
IntType auxv_array_base = aux_data_base - aux_array_size - aux_padding;
IntType envp_array_base = auxv_array_base - envp_array_size;
IntType argv_array_base = envp_array_base - argv_array_size;
IntType argc_base = argv_array_base - argc_size;
DPRINTF(Stack, "The addresses of items on the initial stack:\n");
DPRINTF(Stack, "0x%x - file name\n", file_name_base);
@ -420,11 +512,11 @@ X86LiveProcess::argsInit(int intSize, int pageSize)
// write contents to stack
// figure out argc
uint64_t argc = argv.size();
uint64_t guestArgc = X86ISA::htog(argc);
IntType argc = argv.size();
IntType guestArgc = X86ISA::htog(argc);
//Write out the sentry void *
uint64_t sentry_NULL = 0;
IntType sentry_NULL = 0;
initVirtMem->writeBlob(sentry_base,
(uint8_t*)&sentry_NULL, sentry_size);
@ -470,3 +562,15 @@ X86LiveProcess::argsInit(int intSize, int pageSize)
// num_processes++;
}
void
X86_64LiveProcess::argsInit(int intSize, int pageSize)
{
X86LiveProcess::argsInit<uint64_t>(pageSize);
}
void
I386LiveProcess::argsInit(int intSize, int pageSize)
{
X86LiveProcess::argsInit<uint32_t>(pageSize);
}

33
src/arch/x86/process.hh
View file

@ -62,22 +62,47 @@
#include <vector>
#include "sim/process.hh"
class SyscallDesc;
namespace X86ISA
{
class X86LiveProcess : public LiveProcess
{
protected:
X86LiveProcess(LiveProcessParams * params, ObjectFile *objFile);
SyscallDesc *syscallDescs;
const int numSyscallDescs;
void startup();
X86LiveProcess(LiveProcessParams * params, ObjectFile *objFile,
SyscallDesc *_syscallDescs, int _numSyscallDescs);
template<class IntType>
void argsInit(int pageSize);
public:
SyscallDesc* getDesc(int callnum);
};
//Handles traps which request services from the operating system
virtual void handleTrap(int trapNum, ThreadContext *tc);
class X86_64LiveProcess : public X86LiveProcess
{
protected:
X86_64LiveProcess(LiveProcessParams *params, ObjectFile *objFile,
SyscallDesc *_syscallDescs, int _numSyscallDescs);
public:
void argsInit(int intSize, int pageSize);
void startup();
};
class I386LiveProcess : public X86LiveProcess
{
protected:
I386LiveProcess(LiveProcessParams *params, ObjectFile *objFile,
SyscallDesc *_syscallDescs, int _numSyscallDescs);
public:
void argsInit(int intSize, int pageSize);
void startup();
};
}