sim: Use the Guest ABI mechanism in writeFunc.
This change only modifies the writeFunc since it's easy to test using
the hello world test programs.
Jira Issue: https://gem5.atlassian.net/browse/GEM5-187
Change-Id: Ia4a7bacdb9938d9fbe4093fc6958904d6c423360
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/23192
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
diff --git a/src/sim/syscall_emul.hh b/src/sim/syscall_emul.hh
index 6202039..a0c3cf5 100644
--- a/src/sim/syscall_emul.hh
+++ b/src/sim/syscall_emul.hh
@@ -2645,13 +2645,10 @@
template <class OS>
SyscallReturn
-writeFunc(SyscallDesc *desc, int num, ThreadContext *tc)
+writeFunc(SyscallDesc *desc, int num, ThreadContext *tc,
+ int tgt_fd, Addr buf_ptr, int nbytes)
{
- int index = 0;
auto p = tc->getProcessPtr();
- int tgt_fd = p->getSyscallArg(tc, index);
- Addr buf_ptr = p->getSyscallArg(tc, index);
- int nbytes = p->getSyscallArg(tc, index);
auto hbfdp = std::dynamic_pointer_cast<HBFDEntry>((*p->fds)[tgt_fd]);
if (!hbfdp)
