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arm: Add unlinkat syscall implementation

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added ARM aarch64 unlinkat syscall support, modeled on other <xxx>at syscalls.
This gets all of the cpu2006 int workloads passing in SE mode on aarch64.

Committed by: Nilay Vaish <nilay@cs.wisc.edu>
This commit is contained in:
mike upton 2015-01-03 17:51:48 -06:00
parent 5a5416d575
commit cb911559dc
3 changed files with 25 additions and 2 deletions
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2
src/arch/arm/linux/process.cc
View file

@ -523,7 +523,7 @@ static SyscallDesc syscallDescs64[] = {
/* 32 */ SyscallDesc("flock", unimplementedFunc),
/* 33 */ SyscallDesc("mknodat", unimplementedFunc),
/* 34 */ SyscallDesc("mkdirat", unimplementedFunc),
/* 35 */ SyscallDesc("unlinkat", unimplementedFunc),
/* 35 */ SyscallDesc("unlinkat", unlinkatFunc<ArmLinux64>),
/* 36 */ SyscallDesc("symlinkat", unimplementedFunc),
/* 37 */ SyscallDesc("linkat", unimplementedFunc),
/* 38 */ SyscallDesc("renameat", unimplementedFunc),

8
src/sim/syscall_emul.cc
View file

@ -399,10 +399,16 @@ readlinkFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc,
SyscallReturn
unlinkFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
{
return unlinkHelper(desc, num, p, tc, 0);
}
SyscallReturn
unlinkHelper(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 -EFAULT;

17
src/sim/syscall_emul.hh
View file

@ -195,6 +195,9 @@ SyscallReturn readlinkFunc(SyscallDesc *desc, int num,
LiveProcess *p, ThreadContext *tc);
/// Target unlink() handler.
SyscallReturn unlinkHelper(SyscallDesc *desc, int num,
LiveProcess *p, ThreadContext *tc,
int index);
SyscallReturn unlinkFunc(SyscallDesc *desc, int num,
LiveProcess *p, ThreadContext *tc);
@ -655,6 +658,20 @@ openatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
return openFunc<OS>(desc, callnum, process, tc, 1);
}
/// Target unlinkat() handler.
template <class OS>
SyscallReturn
unlinkatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
ThreadContext *tc)
{
int index = 0;
int dirfd = process->getSyscallArg(tc, index);
if (dirfd != OS::TGT_AT_FDCWD)
warn("unlinkat: first argument not AT_FDCWD; unlikely to work");
return unlinkHelper(desc, callnum, process, tc, 1);
}
/// Target facessat() handler
template <class OS>
SyscallReturn