Matt Sinclair has uploaded this change for review. (
https://gem5-review.googlesource.com/11489
Change subject: syscall_emul: adding link system call
......................................................................
syscall_emul: adding link system call
Change-Id: If8922c2233bbe1f6fce35f64d1a44b91d2cfeed2
---
M src/arch/x86/linux/process.cc
M src/sim/syscall_emul.cc
M src/sim/syscall_emul.hh
3 files changed, 25 insertions(+), 1 deletion(-)
diff --git a/src/arch/x86/linux/process.cc b/src/arch/x86/linux/process.cc
index 7993b80..ca42350 100644
--- a/src/arch/x86/linux/process.cc
+++ b/src/arch/x86/linux/process.cc
@@ -558,7 +558,7 @@
/* 6 */ SyscallDesc("close", closeFunc),
/* 7 */ SyscallDesc("waitpid", unimplementedFunc),
/* 8 */ SyscallDesc("creat", unimplementedFunc),
- /* 9 */ SyscallDesc("link", unimplementedFunc),
+ /* 9 */ SyscallDesc("link", linkFunc),
/* 10 */ SyscallDesc("unlink", unimplementedFunc),
/* 11 */ SyscallDesc("execve", execveFunc<X86Linux32>),
/* 12 */ SyscallDesc("chdir", unimplementedFunc),
diff --git a/src/sim/syscall_emul.cc b/src/sim/syscall_emul.cc
index 7f4d766..e8c1f18 100644
--- a/src/sim/syscall_emul.cc
+++ b/src/sim/syscall_emul.cc
@@ -519,6 +519,27 @@
return (result == -1) ? -errno : result;
}
+SyscallReturn
+linkFunc(SyscallDesc *desc, int num, ThreadContext *tc)
+{
+ string path;
+ string new_path;
+
+ int index = 0;
+ auto p = tc->getProcessPtr();
+ auto mem_state = p->getMemState();
+ auto &virt_mem = mem_state->getVirtMem();
+ if (!virt_mem.tryReadString(path, p->getSyscallArg(tc, index)))
+ return -EFAULT;
+ if (!virt_mem.tryReadString(new_path, p->getSyscallArg(tc, index)))
+ return -EFAULT;
+
+ path = p->checkPathRedirect(path);
+ new_path = p->checkPathRedirect(new_path);
+
+ int result = link(path.c_str(), new_path.c_str());
+ return (result == -1) ? -errno : result;
+}
SyscallReturn
mkdirFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc)
diff --git a/src/sim/syscall_emul.hh b/src/sim/syscall_emul.hh
index e5b0f45..8a7591d 100644
--- a/src/sim/syscall_emul.hh
+++ b/src/sim/syscall_emul.hh
@@ -203,6 +203,9 @@
SyscallReturn unlinkFunc(SyscallDesc *desc, int num,
Process *p, ThreadContext *tc);
+/// Target link() handler
+SyscallReturn linkFunc(SyscallDesc *desc, int num, ThreadContext *tc);
+
/// Target mkdir() handler.
SyscallReturn mkdirFunc(SyscallDesc *desc, int num,
Process *p, ThreadContext *tc);
--
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Gerrit-Project: public/gem5
Gerrit-Branch: master
Gerrit-Change-Id: If8922c2233bbe1f6fce35f64d1a44b91d2cfeed2
Gerrit-Change-Number: 11489
Gerrit-PatchSet: 1
Gerrit-Owner: Matt Sinclair <[email protected]>
Gerrit-MessageType: newchange
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