Gabe Black has uploaded this change for review. (
https://gem5-review.googlesource.com/c/public/gem5/+/53205 )
Change subject: sim-se: Implement the newfstatat system call.
......................................................................
sim-se: Implement the newfstatat system call.
Jira Issue: https://gem5.atlassian.net/browse/GEM5-1117
Change-Id: Id611bc7d6369b7d94ce27f33aff74a61879ce900
---
M src/sim/syscall_emul.hh
1 file changed, 54 insertions(+), 1 deletion(-)
diff --git a/src/sim/syscall_emul.hh b/src/sim/syscall_emul.hh
index 6cbbf00..738ee9d 100644
--- a/src/sim/syscall_emul.hh
+++ b/src/sim/syscall_emul.hh
@@ -367,7 +367,10 @@
if (!ffdp)
return -EBADF;
- path = ffdp->getFileName() + "/" + path;
+ if (path.empty())
+ path = ffdp->getFileName();
+ else
+ path = ffdp->getFileName() + "/" + path;
}
return 0;
@@ -1368,6 +1371,45 @@
return 0;
}
+/// Target newfstatat() handler.
+template <class OS>
+SyscallReturn
+newfstatatFunc(SyscallDesc *desc, ThreadContext *tc, int dirfd,
+ VPtr<> pathname, VPtr<typename OS::tgt_stat> tgt_stat,
+ int flags)
+{
+ std::string path;
+
+ if (!SETranslatingPortProxy(tc).tryReadString(path, pathname))
+ return -EFAULT;
+
+ if (path.empty() && !(flags & OS::TGT_AT_EMPTY_PATH))
+ return -ENOENT;
+ flags = flags & ~OS::TGT_AT_EMPTY_PATH;
+
+ warn_if(flags != 0, "newfstatat: Flag bits %#x not supported.", flags);
+
+ // Modifying path from the directory descriptor
+ if (auto res = atSyscallPath<OS>(tc, dirfd, path); !res.successful()) {
+ return res;
+ }
+
+ auto p = tc->getProcessPtr();
+
+ // Adjust path for cwd and redirection
+ path = p->checkPathRedirect(path);
+
+ struct stat host_buf;
+ int result = stat(path.c_str(), &host_buf);
+
+ if (result < 0)
+ return -errno;
+
+ copyOutStatBuf<OS>(tgt_stat, &host_buf);
+
+ return 0;
+}
+
/// Target fstatat64() handler.
template <class OS>
SyscallReturn
--
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Gerrit-Project: public/gem5
Gerrit-Branch: develop
Gerrit-Change-Id: Id611bc7d6369b7d94ce27f33aff74a61879ce900
Gerrit-Change-Number: 53205
Gerrit-PatchSet: 1
Gerrit-Owner: Gabe Black <gabe.bl...@gmail.com>
Gerrit-MessageType: newchange
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