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X86: Fix up auxiliary vectors.

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The type constants should go into an architecture independent spot since they are universal to all Linux elf binaries. The right value for some of the vectors needs to be determined. Also, x86 does not store argc or argv_array_base in registers like some other architectures.

--HG--
extra : convert_revision : 8d3f6a3e028d881d3c41e8ddf4f29d25738b529c
This commit is contained in:
Gabe Black 2007-07-28 20:33:42 -07:00
parent 8dd7700482
commit e996ff7497
1 changed files with 28 additions and 21 deletions
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49
src/arch/x86/process.cc
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@ -187,7 +187,14 @@ X86LiveProcess::argsInit(int intSize, int pageSize)
X86_AT_UID = 11,
X86_AT_EUID = 12,
X86_AT_GID = 13,
X86_AT_EGID = 14
X86_AT_EGID = 14,
X86_AT_PLATFORM = 15,
X86_AT_HWCAP = 16,
X86_AT_CLKTCK = 17,
X86_AT_SECURE = 13,
X86_AT_VECTOR_SIZE = 44
};
//Setup the auxilliary vectors. These will already have endian conversion.
@ -195,36 +202,39 @@ X86LiveProcess::argsInit(int intSize, int pageSize)
ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile);
if(elfObject)
{
/*
//Bits which describe the system hardware capabilities
auxv.push_back(auxv_t(SPARC_AT_HWCAP, hwcap));
//XXX Figure out what these should be
auxv.push_back(auxv_t(X86_AT_HWCAP, 0));
//The system page size
auxv.push_back(auxv_t(SPARC_AT_PAGESZ, SparcISA::VMPageSize));
//Defined to be 100 in the kernel source.
auxv.push_back(auxv_t(X86_AT_PAGESZ, X86ISA::VMPageSize));
//Frequency at which times() increments
auxv.push_back(auxv_t(SPARC_AT_CLKTCK, 100));
auxv.push_back(auxv_t(X86_AT_CLKTCK, 100));
// 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(SPARC_AT_PHDR, elfObject->programHeaderTable()));
auxv.push_back(auxv_t(X86_AT_PHDR, elfObject->programHeaderTable()));
// This is the size of a program header entry from the elf file.
auxv.push_back(auxv_t(SPARC_AT_PHENT, elfObject->programHeaderSize()));
auxv.push_back(auxv_t(X86_AT_PHENT, elfObject->programHeaderSize()));
// This is the number of program headers from the original elf file.
auxv.push_back(auxv_t(SPARC_AT_PHNUM, elfObject->programHeaderCount()));
auxv.push_back(auxv_t(X86_AT_PHNUM, elfObject->programHeaderCount()));
//Defined to be 100 in the kernel source.
//This is the address of the elf "interpreter", It should be set
//to 0 for regular executables. It should be something else
//(not sure what) for dynamic libraries.
auxv.push_back(auxv_t(SPARC_AT_BASE, 0));
//This is hardwired to 0 in the elf loading code in the kernel
auxv.push_back(auxv_t(SPARC_AT_FLAGS, 0));
auxv.push_back(auxv_t(X86_AT_BASE, 0));
//XXX Figure out what this should be.
auxv.push_back(auxv_t(X86_AT_FLAGS, 0));
//The entry point to the program
auxv.push_back(auxv_t(SPARC_AT_ENTRY, objFile->entryPoint()));
auxv.push_back(auxv_t(X86_AT_ENTRY, objFile->entryPoint()));
//Different user and group IDs
auxv.push_back(auxv_t(SPARC_AT_UID, uid()));
auxv.push_back(auxv_t(SPARC_AT_EUID, euid()));
auxv.push_back(auxv_t(SPARC_AT_GID, gid()));
auxv.push_back(auxv_t(SPARC_AT_EGID, egid()));
auxv.push_back(auxv_t(X86_AT_UID, uid()));
auxv.push_back(auxv_t(X86_AT_EUID, euid()));
auxv.push_back(auxv_t(X86_AT_GID, gid()));
auxv.push_back(auxv_t(X86_AT_EGID, egid()));
//Whether to enable "secure mode" in the executable
auxv.push_back(auxv_t(SPARC_AT_SECURE, 0));*/
auxv.push_back(auxv_t(X86_AT_SECURE, 0));
//The string "x86_64" with unknown meaning
auxv.push_back(auxv_t(X86_AT_PLATFORM, 0));
}
//Figure out how big the initial stack needs to be
@ -338,9 +348,6 @@ X86LiveProcess::argsInit(int intSize, int pageSize)
initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize);
//Set up the thread context to start running the process
assert(NumArgumentRegs >= 2);
threadContexts[0]->setIntReg(ArgumentReg[0], argc);
threadContexts[0]->setIntReg(ArgumentReg[1], argv_array_base);
threadContexts[0]->setIntReg(StackPointerReg, stack_min);
Addr prog_entry = objFile->entryPoint();