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Fix building on OpenBSD/riscv64.

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Unbreak on riscv64, we don't have sys/auxv.h or getauxval().

OpenBSD/riscv64 assumes RV64GC, aka RV64IMAFDC.

Our kernel provides no support for the V extension.
This commit is contained in:
Brad Smith 2024-04-27 07:44:37 -04:00
parent 1786a4ddb0
commit 59ba9ab973
1 changed files with 12 additions and 0 deletions
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12
Common/RiscVCPUDetect.cpp
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@ -27,7 +27,9 @@
#include <cstring> #include <cstring>
#include <set> #include <set>
#include <sstream> #include <sstream>
#ifndef __OpenBSD__
#include <sys/auxv.h> #include <sys/auxv.h>
#endif
#include <vector> #include <vector>
#include "Common/Common.h" #include "Common/Common.h"
#include "Common/CPUDetect.h" #include "Common/CPUDetect.h"
@ -201,6 +203,15 @@ void CPUInfo::Detect()
} }
#endif #endif
#ifdef __OpenBSD__
/* OpenBSD uses RV64GC */
RiscV_M = true;
RiscV_A = true;
RiscV_F = true;
RiscV_D = true;
RiscV_C = true;
RiscV_V = false;
#else
unsigned long hwcap = getauxval(AT_HWCAP); unsigned long hwcap = getauxval(AT_HWCAP);
RiscV_M = ExtensionSupported(hwcap, 'M'); RiscV_M = ExtensionSupported(hwcap, 'M');
RiscV_A = ExtensionSupported(hwcap, 'A'); RiscV_A = ExtensionSupported(hwcap, 'A');
@ -208,6 +219,7 @@ void CPUInfo::Detect()
RiscV_D = ExtensionSupported(hwcap, 'D'); RiscV_D = ExtensionSupported(hwcap, 'D');
RiscV_C = ExtensionSupported(hwcap, 'C'); RiscV_C = ExtensionSupported(hwcap, 'C');
RiscV_V = ExtensionSupported(hwcap, 'V'); RiscV_V = ExtensionSupported(hwcap, 'V');
#endif
// We assume as in RVA20U64 that F means Zicsr is available. // We assume as in RVA20U64 that F means Zicsr is available.
RiscV_Zicsr = RiscV_F; RiscV_Zicsr = RiscV_F;