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sim, arm: implement more of the at variety syscalls

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Needed for new AArch64 binaries
This commit is contained in:
Ali Saidi 2014-04-17 16:55:05 -05:00
parent f5c3f60601
commit c4a2f76fea
3 changed files with 53 additions and 8 deletions
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4
src/arch/arm/linux/process.cc
View file

@ -536,7 +536,7 @@ static SyscallDesc syscallDescs64[] = {
/* 45 */ SyscallDesc("truncate64", unimplementedFunc),
/* 46 */ SyscallDesc("ftruncate64", ftruncate64Func),
/* 47 */ SyscallDesc("fallocate", unimplementedFunc),
/* 48 */ SyscallDesc("faccessat", unimplementedFunc),
/* 48 */ SyscallDesc("faccessat", faccessatFunc<ArmLinux64>),
/* 49 */ SyscallDesc("chdir", unimplementedFunc),
/* 50 */ SyscallDesc("fchdir", unimplementedFunc),
/* 51 */ SyscallDesc("chroot", unimplementedFunc),
@ -566,7 +566,7 @@ static SyscallDesc syscallDescs64[] = {
/* 75 */ SyscallDesc("vmsplice", unimplementedFunc),
/* 76 */ SyscallDesc("splice", unimplementedFunc),
/* 77 */ SyscallDesc("tee", unimplementedFunc),
/* 78 */ SyscallDesc("readlinkat", unimplementedFunc),
/* 78 */ SyscallDesc("readlinkat", readlinkatFunc<ArmLinux64>),
/* 79 */ SyscallDesc("fstatat64", fstatat64Func<ArmLinux64>),
/* 80 */ SyscallDesc("fstat64", fstat64Func<ArmLinux64>),
/* 81 */ SyscallDesc("sync", unimplementedFunc),

23
src/sim/syscall_emul.cc
View file

@ -351,13 +351,20 @@ getcwdFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
return (result == -1) ? -errno : result;
}
/// Target open() handler.
SyscallReturn
readlinkFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
ThreadContext *tc)
{
return readlinkFunc(desc, callnum, process, tc, 0);
}
SyscallReturn
readlinkFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
readlinkFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc,
int index)
{
string path;
int index = 0;
if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index)))
return (TheISA::IntReg)-EFAULT;
@ -852,10 +859,9 @@ cloneFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
}
SyscallReturn
accessFunc(SyscallDesc *desc, int callnum, LiveProcess *p, ThreadContext *tc)
accessFunc(SyscallDesc *desc, int callnum, LiveProcess *p, ThreadContext *tc,
int index)
{
int index = 0;
string path;
if (!tc->getMemProxy().tryReadString(path, p->getSyscallArg(tc, index)))
return (TheISA::IntReg)-EFAULT;
@ -868,3 +874,10 @@ accessFunc(SyscallDesc *desc, int callnum, LiveProcess *p, ThreadContext *tc)
int result = access(path.c_str(), mode);
return (result == -1) ? -errno : result;
}
SyscallReturn
accessFunc(SyscallDesc *desc, int callnum, LiveProcess *p, ThreadContext *tc)
{
return accessFunc(desc, callnum, p, tc, 0);
}

34
src/sim/syscall_emul.hh
View file

@ -253,7 +253,10 @@ SyscallReturn gethostnameFunc(SyscallDesc *desc, int num,
SyscallReturn getcwdFunc(SyscallDesc *desc, int num,
LiveProcess *p, ThreadContext *tc);
/// Target unlink() handler.
/// Target readlink() handler.
SyscallReturn readlinkFunc(SyscallDesc *desc, int num,
LiveProcess *p, ThreadContext *tc,
int index = 0);
SyscallReturn readlinkFunc(SyscallDesc *desc, int num,
LiveProcess *p, ThreadContext *tc);
@ -350,6 +353,9 @@ SyscallReturn cloneFunc(SyscallDesc *desc, int num,
/// Target access() handler
SyscallReturn accessFunc(SyscallDesc *desc, int num,
LiveProcess *p, ThreadContext *tc);
SyscallReturn accessFunc(SyscallDesc *desc, int num,
LiveProcess *p, ThreadContext *tc,
int index);
/// Futex system call
/// Implemented by Daniel Sanchez
@ -696,6 +702,32 @@ openatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
return openFunc<OS>(desc, callnum, process, tc, 1);
}
/// Target facessat() handler
template <class OS>
SyscallReturn
faccessatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
ThreadContext *tc)
{
int index = 0;
int dirfd = process->getSyscallArg(tc, index);
if (dirfd != OS::TGT_AT_FDCWD)
warn("faccessat: first argument not AT_FDCWD; unlikely to work");
return accessFunc(desc, callnum, process, tc, 1);
}
/// Target readlinkat() handler
template <class OS>
SyscallReturn
readlinkatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
ThreadContext *tc)
{
int index = 0;
int dirfd = process->getSyscallArg(tc, index);
if (dirfd != OS::TGT_AT_FDCWD)
warn("openat: first argument not AT_FDCWD; unlikely to work");
return readlinkFunc(desc, callnum, process, tc, 1);
}
/// Target sysinfo() handler.
template <class OS>
SyscallReturn