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sim: Use the Guest ABI mechanism in writeFunc.

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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>
This commit is contained in:
Gabe Black
2019-11-25 23:30:26 -08:00
parent af07a51f0b
commit c7cb8bb5d8
1 changed files with 2 additions and 5 deletions
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7
src/sim/syscall_emul.hh
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@@ -2645,13 +2645,10 @@ readFunc(SyscallDesc *desc, int num, ThreadContext *tc)
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)