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authorAli Saidi <Ali.Saidi@ARM.com>2014-04-17 16:55:05 -0500
committerAli Saidi <Ali.Saidi@ARM.com>2014-04-17 16:55:05 -0500
commitc4a2f76fea6f9361363afd901c40290abf3344d9 (patch)
treefe4c8e6d63d351683397418f9f8c4eecf4d0bac9 /src
parentf5c3f60601c8877196f11f8fc7f79d57e9775426 (diff)
downloadgem5-c4a2f76fea6f9361363afd901c40290abf3344d9.tar.xz
sim, arm: implement more of the at variety syscalls
Needed for new AArch64 binaries
Diffstat (limited to 'src')
-rw-r--r--src/arch/arm/linux/process.cc4
-rw-r--r--src/sim/syscall_emul.cc23
-rw-r--r--src/sim/syscall_emul.hh34
3 files changed, 53 insertions, 8 deletions
diff --git a/src/arch/arm/linux/process.cc b/src/arch/arm/linux/process.cc
index 7f8f9ccd6..faa39fd34 100644
--- a/src/arch/arm/linux/process.cc
+++ b/src/arch/arm/linux/process.cc
@@ -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),
diff --git a/src/sim/syscall_emul.cc b/src/sim/syscall_emul.cc
index a86065317..935193e7f 100644
--- a/src/sim/syscall_emul.cc
+++ b/src/sim/syscall_emul.cc
@@ -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);
+}
+
diff --git a/src/sim/syscall_emul.hh b/src/sim/syscall_emul.hh
index ac01ba1e8..e971902cb 100644
--- a/src/sim/syscall_emul.hh
+++ b/src/sim/syscall_emul.hh
@@ -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