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Architecture
Core
Crash
Driver
Interrupts
Memory
Video
CPU.cpp
Debugger.cpp
Disk.cpp
Lock.cpp
PeripheralComponentInterconnect.cpp
Power.cpp
README.md
Random.cpp
StackGuard.cpp
Symbols.cpp
SystemManagementBIOS.cpp
Time.cpp
Timer.cpp
UndefinedBehaviorSanitization.c
UniversalAsynchronousReceiverTransmitter.cpp
crashhandler.hpp
smbios.hpp
ubsan.h
Execute
FileSystem
Files
GUI
Library
Network
Profiling
Recovery
SystemCalls
Tasking
Tests
include
.gitignore
DAPI.hpp
Doxyfile
Fex.hpp
KConfig.cpp
KThread.cpp
Kernel.cpp
LICENSE
Makefile
README.md
dump.sh
ipc.h
kernel.h
syscalls.h
157 lines
4.5 KiB
C++
157 lines
4.5 KiB
C++
#include <rand.hpp>
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#include <cpu.hpp>
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namespace Random
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{
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static uint64_t Seed = 0xdeadbeef;
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uint16_t rand16()
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{
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int RDRANDFlag = 0;
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if (strcmp(CPU::Vendor(), x86_CPUID_VENDOR_AMD) == 0)
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{
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#if defined(a64)
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CPU::x64::AMD::CPUID0x1 cpuid1amd;
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#elif defined(a32)
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CPU::x32::AMD::CPUID0x1 cpuid1amd;
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#endif
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#if defined(a64) || defined(a32)
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asmv("cpuid"
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: "=a"(cpuid1amd.EAX.raw), "=b"(cpuid1amd.EBX.raw), "=c"(cpuid1amd.ECX.raw), "=d"(cpuid1amd.EDX.raw)
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: "a"(0x1));
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#endif
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RDRANDFlag = cpuid1amd.ECX.RDRAND;
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}
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else if (strcmp(CPU::Vendor(), x86_CPUID_VENDOR_INTEL) == 0)
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{
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#if defined(a64)
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CPU::x64::Intel::CPUID0x1 cpuid1intel;
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#elif defined(a32)
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CPU::x32::Intel::CPUID0x1 cpuid1intel;
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#endif
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#if defined(a64) || defined(a32)
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asmv("cpuid"
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: "=a"(cpuid1intel.EAX.raw), "=b"(cpuid1intel.EBX.raw), "=c"(cpuid1intel.ECX.raw), "=d"(cpuid1intel.EDX.raw)
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: "a"(0x1));
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#endif
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RDRANDFlag = cpuid1intel.ECX.RDRAND;
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}
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if (strcmp(CPU::Hypervisor(), x86_CPUID_VENDOR_TCG) == 0)
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RDRANDFlag = 0;
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#if defined(a64) || defined(a32)
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if (RDRANDFlag)
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{
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uint16_t RDRANDValue = 0;
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asmv("1: rdrand %0; jnc 1b"
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: "=r"(RDRANDValue));
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return RDRANDValue;
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}
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#endif
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Seed = Seed * 1103515245 + 12345;
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return (uint16_t)(Seed / 65536) % __UINT16_MAX__;
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}
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uint32_t rand32()
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{
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int RDRANDFlag = 0;
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if (strcmp(CPU::Vendor(), x86_CPUID_VENDOR_AMD) == 0)
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{
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#if defined(a64)
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CPU::x64::AMD::CPUID0x1 cpuid1amd;
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#elif defined(a32)
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CPU::x32::AMD::CPUID0x1 cpuid1amd;
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#endif
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#if defined(a64) || defined(a32)
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asmv("cpuid"
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: "=a"(cpuid1amd.EAX.raw), "=b"(cpuid1amd.EBX.raw), "=c"(cpuid1amd.ECX.raw), "=d"(cpuid1amd.EDX.raw)
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: "a"(0x1));
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#endif
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RDRANDFlag = cpuid1amd.ECX.RDRAND;
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}
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else if (strcmp(CPU::Vendor(), x86_CPUID_VENDOR_INTEL) == 0)
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{
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#if defined(a64)
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CPU::x64::Intel::CPUID0x1 cpuid1intel;
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#elif defined(a32)
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CPU::x32::Intel::CPUID0x1 cpuid1intel;
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#endif
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#if defined(a64) || defined(a32)
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asmv("cpuid"
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: "=a"(cpuid1intel.EAX.raw), "=b"(cpuid1intel.EBX.raw), "=c"(cpuid1intel.ECX.raw), "=d"(cpuid1intel.EDX.raw)
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: "a"(0x1));
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#endif
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RDRANDFlag = cpuid1intel.ECX.RDRAND;
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}
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if (strcmp(CPU::Hypervisor(), x86_CPUID_VENDOR_TCG) == 0)
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RDRANDFlag = 0;
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#if defined(a64) || defined(a32)
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if (RDRANDFlag)
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{
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uint32_t RDRANDValue = 0;
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asmv("1: rdrand %0; jnc 1b"
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: "=r"(RDRANDValue));
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return RDRANDValue;
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}
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#endif
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Seed = Seed * 1103515245 + 12345;
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return (uint32_t)(Seed / 65536) % __UINT16_MAX__;
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}
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uint64_t rand64()
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{
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int RDRANDFlag = 0;
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if (strcmp(CPU::Vendor(), x86_CPUID_VENDOR_AMD) == 0)
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{
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#if defined(a64)
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CPU::x64::AMD::CPUID0x1 cpuid1amd;
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#elif defined(a32)
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CPU::x32::AMD::CPUID0x1 cpuid1amd;
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#endif
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#if defined(a64) || defined(a32)
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asmv("cpuid"
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: "=a"(cpuid1amd.EAX.raw), "=b"(cpuid1amd.EBX.raw), "=c"(cpuid1amd.ECX.raw), "=d"(cpuid1amd.EDX.raw)
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: "a"(0x1));
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#endif
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RDRANDFlag = cpuid1amd.ECX.RDRAND;
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}
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else if (strcmp(CPU::Vendor(), x86_CPUID_VENDOR_INTEL) == 0)
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{
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#if defined(a64)
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CPU::x64::Intel::CPUID0x1 cpuid1intel;
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#elif defined(a32)
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CPU::x32::Intel::CPUID0x1 cpuid1intel;
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#endif
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#if defined(a64) || defined(a32)
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asmv("cpuid"
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: "=a"(cpuid1intel.EAX.raw), "=b"(cpuid1intel.EBX.raw), "=c"(cpuid1intel.ECX.raw), "=d"(cpuid1intel.EDX.raw)
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: "a"(0x1));
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#endif
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RDRANDFlag = cpuid1intel.ECX.RDRAND;
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}
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if (strcmp(CPU::Hypervisor(), x86_CPUID_VENDOR_TCG) == 0)
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RDRANDFlag = 0;
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#if defined(a64) || defined(a32)
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if (RDRANDFlag)
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{
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uint64_t RDRANDValue = 0;
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asmv("1: rdrand %0; jnc 1b"
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: "=r"(RDRANDValue));
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return RDRANDValue;
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}
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#endif
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Seed = Seed * 1103515245 + 12345;
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return (uint64_t)(Seed / 65536) % __UINT16_MAX__;
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}
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void ChangeSeed(uint64_t CustomSeed) { Seed = CustomSeed; }
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}
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