riscv: fixed syscall return value
In case of failure, a syscall returns a negative value encoding the
error code. This patch makes the risc-v implementation returns the
encoded value instead of its absolute value upon a failure of a syscall.
Change-Id: I6032b0337fe1cff5b326dbc6bb3b87a415f03300
Reviewed-on: https://gem5-review.googlesource.com/c/9627
Reviewed-by: Alec Roelke <ar4jc@virginia.edu>
Maintainer: Alec Roelke <ar4jc@virginia.edu>
diff --git a/src/arch/riscv/process.cc b/src/arch/riscv/process.cc
index ed6de15..16d0dc7 100644
--- a/src/arch/riscv/process.cc
+++ b/src/arch/riscv/process.cc
@@ -279,6 +279,6 @@
tc->setIntReg(SyscallPseudoReturnReg, sysret.returnValue());
} else {
// got an error, return details
- tc->setIntReg(SyscallPseudoReturnReg, sysret.errnoValue());
+ tc->setIntReg(SyscallPseudoReturnReg, sysret.encodedValue());
}
}
